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freebsd-skq/sys/dev/sdhci/sdhci.c

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Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/*-
sys/dev: further adoption of SPDX licensing ID tags. Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
2017-11-27 14:52:40 +00:00
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
* Copyright (c) 2008 Alexander Motin <mav@FreeBSD.org>
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
* Copyright (c) 2017 Marius Strobl <marius@FreeBSD.org>
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
#include <sys/callout.h>
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
#include <sys/conf.h>
#include <sys/kernel.h>
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
#include <sys/kobj.h>
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
#include <sys/lock.h>
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
#include <sys/malloc.h>
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/resource.h>
#include <sys/rman.h>
Add hw.sdhci.debug sysctl to control debug level.
2009-01-28 22:53:41 +00:00
#include <sys/sysctl.h>
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
#include <sys/taskqueue.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/stdarg.h>
#include <dev/mmc/bridge.h>
#include <dev/mmc/mmcreg.h>
#include <dev/mmc/mmcbrvar.h>
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
#include <dev/sdhci/sdhci.h>
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_debug.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
#include "mmcbr_if.h"
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
#include "sdhci_if.h"
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#include "opt_mmccam.h"
- Nuke unused sdhci_softc. - Static'ize sdhci_debug local to sdhci.c. - Const'ify PCI device description strings. - Nuke redundant resource ID members from sdhci_pci_softc. - Nuke unused hw.sdhci_pci.debug tunable. - Add support for using MSI instead of INTx, controllable via the tunable hw.sdhci.enable_msi (defaulting to on) and tested with a RICOH R5CE823 SD controller. - Use NULL instead of 0 for pointers. MFC after: 3 days
2014-08-31 17:56:54 +00:00
SYSCTL_NODE(_hw, OID_AUTO, sdhci, CTLFLAG_RD, 0, "sdhci driver");
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
static int sdhci_debug = 0;
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
SYSCTL_INT(_hw_sdhci, OID_AUTO, debug, CTLFLAG_RWTUN, &sdhci_debug, 0,
"Debug level");
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
u_int sdhci_quirk_clear = 0;
SYSCTL_INT(_hw_sdhci, OID_AUTO, quirk_clear, CTLFLAG_RWTUN, &sdhci_quirk_clear,
0, "Mask of quirks to clear");
u_int sdhci_quirk_set = 0;
SYSCTL_INT(_hw_sdhci, OID_AUTO, quirk_set, CTLFLAG_RWTUN, &sdhci_quirk_set, 0,
"Mask of quirks to set");
Add hw.sdhci.debug sysctl to control debug level.
2009-01-28 22:53:41 +00:00
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
#define RD1(slot, off) SDHCI_READ_1((slot)->bus, (slot), (off))
#define RD2(slot, off) SDHCI_READ_2((slot)->bus, (slot), (off))
#define RD4(slot, off) SDHCI_READ_4((slot)->bus, (slot), (off))
#define RD_MULTI_4(slot, off, ptr, count) \
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
SDHCI_READ_MULTI_4((slot)->bus, (slot), (off), (ptr), (count))
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
#define WR1(slot, off, val) SDHCI_WRITE_1((slot)->bus, (slot), (off), (val))
#define WR2(slot, off, val) SDHCI_WRITE_2((slot)->bus, (slot), (off), (val))
#define WR4(slot, off, val) SDHCI_WRITE_4((slot)->bus, (slot), (off), (val))
#define WR_MULTI_4(slot, off, ptr, count) \
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
SDHCI_WRITE_MULTI_4((slot)->bus, (slot), (off), (ptr), (count))
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
static void sdhci_card_poll(void *arg);
static void sdhci_card_task(void *arg, int pending);
static int sdhci_exec_tuning(struct sdhci_slot *slot, bool reset);
static void sdhci_req_wakeup(struct mmc_request *req);
static void sdhci_retune(void *arg);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
static void sdhci_set_clock(struct sdhci_slot *slot, uint32_t clock);
static void sdhci_start(struct sdhci_slot *slot);
static void sdhci_start_data(struct sdhci_slot *slot, struct mmc_data *data);
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
#ifdef MMCCAM
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
/* CAM-related */
int sdhci_cam_get_possible_host_clock(struct sdhci_slot *slot, int proposed_clock);
static int sdhci_cam_update_ios(struct sdhci_slot *slot);
static int sdhci_cam_request(struct sdhci_slot *slot, union ccb *ccb);
static void sdhci_cam_action(struct cam_sim *sim, union ccb *ccb);
static void sdhci_cam_poll(struct cam_sim *sim);
static int sdhci_cam_settran_settings(struct sdhci_slot *slot, union ccb *ccb);
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
#endif
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* helper routines */
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
static void sdhci_dumpregs(struct sdhci_slot *slot);
static int slot_printf(struct sdhci_slot *slot, const char * fmt, ...)
__printflike(2, 3);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
static uint32_t sdhci_tuning_intmask(struct sdhci_slot *slot);
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
#define SDHCI_LOCK(_slot) mtx_lock(&(_slot)->mtx)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
#define SDHCI_UNLOCK(_slot) mtx_unlock(&(_slot)->mtx)
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
#define SDHCI_LOCK_INIT(_slot) \
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
mtx_init(&_slot->mtx, "SD slot mtx", "sdhci", MTX_DEF)
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
#define SDHCI_LOCK_DESTROY(_slot) mtx_destroy(&_slot->mtx);
#define SDHCI_ASSERT_LOCKED(_slot) mtx_assert(&_slot->mtx, MA_OWNED);
#define SDHCI_ASSERT_UNLOCKED(_slot) mtx_assert(&_slot->mtx, MA_NOTOWNED);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
- Get proper maximum clock frequency for SDHCI v3.0 and higher
2012-11-30 02:35:13 +00:00
#define SDHCI_DEFAULT_MAX_FREQ 50
Various timing-related fixes: - Replace divisor numbers with more descirptive names - Properly calculate minimum frequency for SDHCI 3.0 - Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock - Add min_freq method to sdhci_if.m and provide default implementation. By re-implementing this method hardware drivers can control frequency controller operates when executing initialization sequence
2013-02-16 23:12:06 +00:00
#define SDHCI_200_MAX_DIVIDER 256
#define SDHCI_300_MAX_DIVIDER 2046
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
#define SDHCI_CARD_PRESENT_TICKS (hz / 5)
#define SDHCI_INSERT_DELAY_TICKS (hz / 2)
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
/*
* Broadcom BCM577xx Controller Constants
*/
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
/* Maximum divider supported by the default clock source. */
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
#define BCM577XX_DEFAULT_MAX_DIVIDER 256
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
/* Alternative clock's base frequency. */
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
#define BCM577XX_ALT_CLOCK_BASE 63000000
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
#define BCM577XX_HOST_CONTROL 0x198
#define BCM577XX_CTRL_CLKSEL_MASK 0xFFFFCFFF
#define BCM577XX_CTRL_CLKSEL_SHIFT 12
#define BCM577XX_CTRL_CLKSEL_DEFAULT 0x0
#define BCM577XX_CTRL_CLKSEL_64MHZ 0x3
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
static void
sdhci_getaddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
if (error != 0) {
printf("getaddr: error %d\n", error);
return;
}
*(bus_addr_t *)arg = segs[0].ds_addr;
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
static int
slot_printf(struct sdhci_slot *slot, const char * fmt, ...)
{
va_list ap;
int retval;
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
retval = printf("%s-slot%d: ",
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
device_get_nameunit(slot->bus), slot->num);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
va_start(ap, fmt);
retval += vprintf(fmt, ap);
va_end(ap);
return (retval);
}
static void
sdhci_dumpregs(struct sdhci_slot *slot)
{
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot_printf(slot,
"============== REGISTER DUMP ==============\n");
slot_printf(slot, "Sys addr: 0x%08x | Version: 0x%08x\n",
RD4(slot, SDHCI_DMA_ADDRESS), RD2(slot, SDHCI_HOST_VERSION));
slot_printf(slot, "Blk size: 0x%08x | Blk cnt: 0x%08x\n",
RD2(slot, SDHCI_BLOCK_SIZE), RD2(slot, SDHCI_BLOCK_COUNT));
slot_printf(slot, "Argument: 0x%08x | Trn mode: 0x%08x\n",
RD4(slot, SDHCI_ARGUMENT), RD2(slot, SDHCI_TRANSFER_MODE));
slot_printf(slot, "Present: 0x%08x | Host ctl: 0x%08x\n",
RD4(slot, SDHCI_PRESENT_STATE), RD1(slot, SDHCI_HOST_CONTROL));
slot_printf(slot, "Power: 0x%08x | Blk gap: 0x%08x\n",
RD1(slot, SDHCI_POWER_CONTROL), RD1(slot, SDHCI_BLOCK_GAP_CONTROL));
slot_printf(slot, "Wake-up: 0x%08x | Clock: 0x%08x\n",
RD1(slot, SDHCI_WAKE_UP_CONTROL), RD2(slot, SDHCI_CLOCK_CONTROL));
slot_printf(slot, "Timeout: 0x%08x | Int stat: 0x%08x\n",
RD1(slot, SDHCI_TIMEOUT_CONTROL), RD4(slot, SDHCI_INT_STATUS));
slot_printf(slot, "Int enab: 0x%08x | Sig enab: 0x%08x\n",
RD4(slot, SDHCI_INT_ENABLE), RD4(slot, SDHCI_SIGNAL_ENABLE));
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
slot_printf(slot, "AC12 err: 0x%08x | Host ctl2:0x%08x\n",
- Adds macros for the content of SDHCI_ADMA_ERR and SDHCI_HOST_CONTROL2 registers. - Add slot type capability bits. These bits should allow recognizing removable card slots, embedded cards and shared buses (shared bus supposedly is always comprised of non-removable cards). - Dump CAPABILITIES2, ADMA_ERR, HOST_CONTROL2 and ADMA_ADDRESS_LO registers in sdhci_dumpregs(). - The drive type support flags in the CAPABILITIES2 register are for drive types A,C,D, drive type B is the default setting (value 0) of the drive strength field in the SDHCI_HOST_CONTROL2 register. Obtained from: DragonFlyBSD (9e3c8f63, 455bd1b1)
2017-03-16 22:42:17 +00:00
RD2(slot, SDHCI_ACMD12_ERR), RD2(slot, SDHCI_HOST_CONTROL2));
slot_printf(slot, "Caps: 0x%08x | Caps2: 0x%08x\n",
RD4(slot, SDHCI_CAPABILITIES), RD4(slot, SDHCI_CAPABILITIES2));
slot_printf(slot, "Max curr: 0x%08x | ADMA err: 0x%08x\n",
RD4(slot, SDHCI_MAX_CURRENT), RD1(slot, SDHCI_ADMA_ERR));
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
slot_printf(slot, "ADMA addr:0x%08x | Slot int: 0x%08x\n",
- Adds macros for the content of SDHCI_ADMA_ERR and SDHCI_HOST_CONTROL2 registers. - Add slot type capability bits. These bits should allow recognizing removable card slots, embedded cards and shared buses (shared bus supposedly is always comprised of non-removable cards). - Dump CAPABILITIES2, ADMA_ERR, HOST_CONTROL2 and ADMA_ADDRESS_LO registers in sdhci_dumpregs(). - The drive type support flags in the CAPABILITIES2 register are for drive types A,C,D, drive type B is the default setting (value 0) of the drive strength field in the SDHCI_HOST_CONTROL2 register. Obtained from: DragonFlyBSD (9e3c8f63, 455bd1b1)
2017-03-16 22:42:17 +00:00
RD4(slot, SDHCI_ADMA_ADDRESS_LO), RD2(slot, SDHCI_SLOT_INT_STATUS));
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot_printf(slot,
"===========================================\n");
}
static void
sdhci_reset(struct sdhci_slot *slot, uint8_t mask)
{
int timeout;
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
uint32_t clock;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
if (slot->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
Add a new sdhci interface method, get_card_present(). Many embedded SoC controllers that are (more or less) sdhci-compatible don't implement card detect, and the related values in the PRESENT_STATE register aren't useful. A bridge driver can now implement get_card_present() to read a gpio pin or whatever else is necessary for that system. The default implementation reads the CARD_PRESENT bit from the PRESENT_STATE register, so existing drivers will keep working (or keep not-fully-working, since many drivers right now can't detect card insert/remove).
2017-01-08 02:32:53 +00:00
if (!SDHCI_GET_CARD_PRESENT(slot->bus, slot))
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
return;
}
/* Some controllers need this kick or reset won't work. */
if ((mask & SDHCI_RESET_ALL) == 0 &&
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
(slot->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET)) {
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* This is to force an update */
clock = slot->clock;
slot->clock = 0;
sdhci_set_clock(slot, clock);
}
Forget current bus power settings on full reset. Chip must be reconfigured. Do not issue command if there is no card, clock or power. Controller will not detect command timeout without clock active.
2008-12-06 01:31:07 +00:00
if (mask & SDHCI_RESET_ALL) {
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->clock = 0;
Forget current bus power settings on full reset. Chip must be reconfigured. Do not issue command if there is no card, clock or power. Controller will not detect command timeout without clock active.
2008-12-06 01:31:07 +00:00
slot->power = 0;
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
Add a new sdhci quirk, SDHCI_QUIRK_WAITFOR_RESET_ASSERTED, to work around TI OMAP controllers which will return the reset-in-progress bit as zero if you read the status register too fast after setting the reset bit. The zero is apparently from a stale snapshot of the internal state presented in the interface register, and leads to a false indication that the reset is complete when it either hasn't started yet or is in-progress. The workaround is to first loop until the bit is seen as asserted, then do the normal loop waiting to see it de-asserted. Submitted by: Michal Meloun <meloun@miracle.cz>
2014-12-20 01:13:13 +00:00
WR1(slot, SDHCI_SOFTWARE_RESET, mask);
if (slot->quirks & SDHCI_QUIRK_WAITFOR_RESET_ASSERTED) {
/*
* Resets on TI OMAPs and AM335x are incompatible with SDHCI
* specification. The reset bit has internal propagation delay,
* so a fast read after write returns 0 even if reset process is
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
* in progress. The workaround is to poll for 1 before polling
Add a new sdhci quirk, SDHCI_QUIRK_WAITFOR_RESET_ASSERTED, to work around TI OMAP controllers which will return the reset-in-progress bit as zero if you read the status register too fast after setting the reset bit. The zero is apparently from a stale snapshot of the internal state presented in the interface register, and leads to a false indication that the reset is complete when it either hasn't started yet or is in-progress. The workaround is to first loop until the bit is seen as asserted, then do the normal loop waiting to see it de-asserted. Submitted by: Michal Meloun <meloun@miracle.cz>
2014-12-20 01:13:13 +00:00
* for 0. In the worst case, if we miss seeing it asserted the
* time we spent waiting is enough to ensure the reset finishes.
*/
timeout = 10000;
while ((RD1(slot, SDHCI_SOFTWARE_RESET) & mask) != mask) {
if (timeout <= 0)
break;
timeout--;
DELAY(1);
}
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* Wait max 100 ms */
Add a new sdhci quirk, SDHCI_QUIRK_WAITFOR_RESET_ASSERTED, to work around TI OMAP controllers which will return the reset-in-progress bit as zero if you read the status register too fast after setting the reset bit. The zero is apparently from a stale snapshot of the internal state presented in the interface register, and leads to a false indication that the reset is complete when it either hasn't started yet or is in-progress. The workaround is to first loop until the bit is seen as asserted, then do the normal loop waiting to see it de-asserted. Submitted by: Michal Meloun <meloun@miracle.cz>
2014-12-20 01:13:13 +00:00
timeout = 10000;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* Controller clears the bits when it's done */
Add a new sdhci quirk, SDHCI_QUIRK_WAITFOR_RESET_ASSERTED, to work around TI OMAP controllers which will return the reset-in-progress bit as zero if you read the status register too fast after setting the reset bit. The zero is apparently from a stale snapshot of the internal state presented in the interface register, and leads to a false indication that the reset is complete when it either hasn't started yet or is in-progress. The workaround is to first loop until the bit is seen as asserted, then do the normal loop waiting to see it de-asserted. Submitted by: Michal Meloun <meloun@miracle.cz>
2014-12-20 01:13:13 +00:00
while (RD1(slot, SDHCI_SOFTWARE_RESET) & mask) {
if (timeout <= 0) {
slot_printf(slot, "Reset 0x%x never completed.\n",
mask);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
sdhci_dumpregs(slot);
return;
}
timeout--;
Add a new sdhci quirk, SDHCI_QUIRK_WAITFOR_RESET_ASSERTED, to work around TI OMAP controllers which will return the reset-in-progress bit as zero if you read the status register too fast after setting the reset bit. The zero is apparently from a stale snapshot of the internal state presented in the interface register, and leads to a false indication that the reset is complete when it either hasn't started yet or is in-progress. The workaround is to first loop until the bit is seen as asserted, then do the normal loop waiting to see it de-asserted. Submitted by: Michal Meloun <meloun@miracle.cz>
2014-12-20 01:13:13 +00:00
DELAY(10);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
}
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
static uint32_t
sdhci_tuning_intmask(struct sdhci_slot *slot)
{
uint32_t intmask;
intmask = 0;
if (slot->opt & SDHCI_TUNING_SUPPORTED) {
intmask |= SDHCI_INT_TUNEERR;
if (slot->retune_mode == SDHCI_RETUNE_MODE_2 ||
slot->retune_mode == SDHCI_RETUNE_MODE_3)
intmask |= SDHCI_INT_RETUNE;
}
return (intmask);
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
static void
sdhci_init(struct sdhci_slot *slot)
{
sdhci_reset(slot, SDHCI_RESET_ALL);
/* Enable interrupts. */
slot->intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE |
Back out enabling the card interrupt detection bit. It is not ready to commit. Noticed by: marius@
2017-07-09 20:49:02 +00:00
SDHCI_INT_ACMD12ERR;
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
if (!(slot->quirks & SDHCI_QUIRK_POLL_CARD_PRESENT) &&
!(slot->opt & SDHCI_NON_REMOVABLE)) {
slot->intmask |= SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT;
}
- There is no need to keep the tuning error and re-tuning interrupts enabled (though, no interrupt generation enabled for them) all the time as soon as (re-)tuning is supported; only enable them and let them generate interrupts when actually using (re-)tuning. - Also disable all interrupts except SDHCI_INT_DATA_AVAIL ones while executing tuning and not just their signaling.
2017-12-29 12:48:19 +00:00
WR4(slot, SDHCI_INT_ENABLE, slot->intmask);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
}
static void
sdhci_set_clock(struct sdhci_slot *slot, uint32_t clock)
{
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
uint32_t clk_base;
uint32_t clk_sel;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
uint32_t res;
uint16_t clk;
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
uint16_t div;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
int timeout;
if (clock == slot->clock)
return;
slot->clock = clock;
/* Turn off the clock. */
When changing the sd bus clock divisor, clear just the bus clock enable bit before changing the divisor bits in the register. We were writing a zero to the register, which clears the enable, but also cleared the divisor bits at the same time. That's a violation of the sdhci spec, which says the divisor can only be changed when the clock is disabled. This has worked okay on most hardware for years, but the TI OMAP controller would misbehave after changing the divisor improperly. Submitted by: Svatopluk Kraus <onwahe@gmail.com>
2014-04-04 01:10:02 +00:00
clk = RD2(slot, SDHCI_CLOCK_CONTROL);
WR2(slot, SDHCI_CLOCK_CONTROL, clk & ~SDHCI_CLOCK_CARD_EN);
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
/* If no clock requested - leave it so. */
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
if (clock == 0)
return;
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
/* Determine the clock base frequency */
clk_base = slot->max_clk;
if (slot->quirks & SDHCI_QUIRK_BCM577XX_400KHZ_CLKSRC) {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
clk_sel = RD2(slot, BCM577XX_HOST_CONTROL) &
BCM577XX_CTRL_CLKSEL_MASK;
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
/*
* Select clock source appropriate for the requested frequency.
*/
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
if ((clk_base / BCM577XX_DEFAULT_MAX_DIVIDER) > clock) {
clk_base = BCM577XX_ALT_CLOCK_BASE;
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
clk_sel |= (BCM577XX_CTRL_CLKSEL_64MHZ <<
BCM577XX_CTRL_CLKSEL_SHIFT);
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
} else {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
clk_sel |= (BCM577XX_CTRL_CLKSEL_DEFAULT <<
BCM577XX_CTRL_CLKSEL_SHIFT);
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
}
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
WR2(slot, BCM577XX_HOST_CONTROL, clk_sel);
}
When the timeout clock is based on the SD clock, the timeout counter has to be recalculated every time the SD clock frequency changes. Also, tidy up the counter calculation... it makes no sense to calculate a value one larger than the limit, then whine that it's too large and truncate it to the limit. If the BROKEN_TIMEOUT quirk is set, don't calculate the counter at all, just set it to the limit value.
2013-08-16 19:40:00 +00:00
/* Recalculate timeout clock frequency based on the new sd clock. */
if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)
slot->timeout_clk = slot->clock / 1000;
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
if (slot->version < SDHCI_SPEC_300) {
/* Looking for highest freq <= clock. */
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
res = clk_base;
Various timing-related fixes: - Replace divisor numbers with more descirptive names - Properly calculate minimum frequency for SDHCI 3.0 - Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock - Add min_freq method to sdhci_if.m and provide default implementation. By re-implementing this method hardware drivers can control frequency controller operates when executing initialization sequence
2013-02-16 23:12:06 +00:00
for (div = 1; div < SDHCI_200_MAX_DIVIDER; div <<= 1) {
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
if (res <= clock)
break;
res >>= 1;
}
/* Divider 1:1 is 0x00, 2:1 is 0x01, 256:1 is 0x80 ... */
div >>= 1;
Again, fixes regarding style(4), to comments, includes and unused parameters.
2017-03-17 22:57:37 +00:00
} else {
/* Version 3.0 divisors are multiples of two up to 1023 * 2 */
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
if (clock >= clk_base)
Various timing-related fixes: - Replace divisor numbers with more descirptive names - Properly calculate minimum frequency for SDHCI 3.0 - Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock - Add min_freq method to sdhci_if.m and provide default implementation. By re-implementing this method hardware drivers can control frequency controller operates when executing initialization sequence
2013-02-16 23:12:06 +00:00
div = 0;
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
else {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
for (div = 2; div < SDHCI_300_MAX_DIVIDER; div += 2) {
if ((clk_base / div) <= clock)
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
break;
}
}
div >>= 1;
}
if (bootverbose || sdhci_debug)
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
slot_printf(slot, "Divider %d for freq %d (base %d)\n",
Add support for the BCM57765 card reader. This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
2015-10-15 04:22:56 +00:00
div, clock, clk_base);
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* Now we have got divider, set it. */
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
clk = (div & SDHCI_DIVIDER_MASK) << SDHCI_DIVIDER_SHIFT;
clk |= ((div >> SDHCI_DIVIDER_MASK_LEN) & SDHCI_DIVIDER_HI_MASK)
<< SDHCI_DIVIDER_HI_SHIFT;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
WR2(slot, SDHCI_CLOCK_CONTROL, clk);
/* Enable clock. */
clk |= SDHCI_CLOCK_INT_EN;
WR2(slot, SDHCI_CLOCK_CONTROL, clk);
/* Wait up to 10 ms until it stabilize. */
timeout = 10;
while (!((clk = RD2(slot, SDHCI_CLOCK_CONTROL))
& SDHCI_CLOCK_INT_STABLE)) {
if (timeout == 0) {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
slot_printf(slot,
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
"Internal clock never stabilised.\n");
sdhci_dumpregs(slot);
return;
}
timeout--;
DELAY(1000);
}
/* Pass clock signal to the bus. */
clk |= SDHCI_CLOCK_CARD_EN;
WR2(slot, SDHCI_CLOCK_CONTROL, clk);
}
static void
sdhci_set_power(struct sdhci_slot *slot, u_char power)
{
Retry up to 20 ms to enable bus power as at least with some Intel SDHCI/eMMC controllers the first attempt after a D3 to D0 transition, i. e. when the firmware has put the devices into D3 state before, can fail.
2017-07-02 19:13:01 +00:00
int i;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
uint8_t pwr;
if (slot->power == power)
return;
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->power = power;
/* Turn off the power. */
pwr = 0;
WR1(slot, SDHCI_POWER_CONTROL, pwr);
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
/* If power down requested - leave it so. */
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
if (power == 0)
return;
/* Set voltage. */
switch (1 << power) {
case MMC_OCR_LOW_VOLTAGE:
pwr |= SDHCI_POWER_180;
break;
case MMC_OCR_290_300:
case MMC_OCR_300_310:
pwr |= SDHCI_POWER_300;
break;
case MMC_OCR_320_330:
case MMC_OCR_330_340:
pwr |= SDHCI_POWER_330;
break;
}
WR1(slot, SDHCI_POWER_CONTROL, pwr);
Retry up to 20 ms to enable bus power as at least with some Intel SDHCI/eMMC controllers the first attempt after a D3 to D0 transition, i. e. when the firmware has put the devices into D3 state before, can fail.
2017-07-02 19:13:01 +00:00
/*
* Turn on VDD1 power. Note that at least some Intel controllers can
* fail to enable bus power on the first try after transiting from D3
Correct a typo in the comment part of r320577, later on copied into the commit message; as actually implemented, the intent is to retry up to 2 ms for controllers to enable bus power. Noticed by: ian@, rgrimes@ Additional note: Among others, the problem addressed by r320577 is the APL32 ("Storage Controllers May Not Be Power Gated") erratum. Hopefully, along with r318282, r320577 works around the remaining problems seen with Intel Apollo Lake eMMC and SDXC controllers.
2017-07-03 20:47:32 +00:00
* to D0, so we give them up to 2 ms.
Retry up to 20 ms to enable bus power as at least with some Intel SDHCI/eMMC controllers the first attempt after a D3 to D0 transition, i. e. when the firmware has put the devices into D3 state before, can fail.
2017-07-02 19:13:01 +00:00
*/
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
pwr |= SDHCI_POWER_ON;
Retry up to 20 ms to enable bus power as at least with some Intel SDHCI/eMMC controllers the first attempt after a D3 to D0 transition, i. e. when the firmware has put the devices into D3 state before, can fail.
2017-07-02 19:13:01 +00:00
for (i = 0; i < 20; i++) {
WR1(slot, SDHCI_POWER_CONTROL, pwr);
if (RD1(slot, SDHCI_POWER_CONTROL) & SDHCI_POWER_ON)
break;
DELAY(100);
}
if (!(RD1(slot, SDHCI_POWER_CONTROL) & SDHCI_POWER_ON))
slot_printf(slot, "Bus power failed to enable");
- Add support for Intel Apollo Lake and Bay Trail eMMC controllers. Besides slots always having non-removable media, these HCIs require a custom hardware reset sequence after power-up. - Flesh out the support for Intel Braswell eMMC controllers further. Apart from also requiring said reset code, the timeout clock needs to be hardcoded to 1 MHz for these. Both the special reset and timeout clock handlings are implemented as global sdhci(4) quirks as the same treatment will be necessary for Intel eMMC controllers attached via ACPI (once sdhci(4) grows such a front-end). - In sdhci_init_slot(), use the right capability field for determining the announced bus width based on MMC_CAP_*_BIT_DATA. - Correct inverted sdhci_pci_softc member comments added in r276469. [1] Submitted by: Anton Yuzhaninov [1] MFC after: 5 days
2017-01-09 17:07:13 +00:00
if (slot->quirks & SDHCI_QUIRK_INTEL_POWER_UP_RESET) {
WR1(slot, SDHCI_POWER_CONTROL, pwr | 0x10);
DELAY(10);
WR1(slot, SDHCI_POWER_CONTROL, pwr);
DELAY(300);
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
static void
sdhci_read_block_pio(struct sdhci_slot *slot)
{
uint32_t data;
char *buffer;
size_t left;
buffer = slot->curcmd->data->data;
buffer += slot->offset;
/* Transfer one block at a time. */
left = min(512, slot->curcmd->data->len - slot->offset);
slot->offset += left;
/* If we are too fast, broken controllers return zeroes. */
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
if (slot->quirks & SDHCI_QUIRK_BROKEN_TIMINGS)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
DELAY(10);
Style changes and typos fixed.
2013-08-19 05:48:42 +00:00
/* Handle unaligned and aligned buffer cases. */
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
if ((intptr_t)buffer & 3) {
while (left > 3) {
data = RD4(slot, SDHCI_BUFFER);
buffer[0] = data;
buffer[1] = (data >> 8);
buffer[2] = (data >> 16);
buffer[3] = (data >> 24);
buffer += 4;
left -= 4;
}
} else {
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
RD_MULTI_4(slot, SDHCI_BUFFER,
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
(uint32_t *)buffer, left >> 2);
left &= 3;
}
/* Handle uneven size case. */
if (left > 0) {
data = RD4(slot, SDHCI_BUFFER);
while (left > 0) {
*(buffer++) = data;
data >>= 8;
left--;
}
}
}
static void
sdhci_write_block_pio(struct sdhci_slot *slot)
{
uint32_t data = 0;
char *buffer;
size_t left;
buffer = slot->curcmd->data->data;
buffer += slot->offset;
/* Transfer one block at a time. */
left = min(512, slot->curcmd->data->len - slot->offset);
slot->offset += left;
Style changes and typos fixed.
2013-08-19 05:48:42 +00:00
/* Handle unaligned and aligned buffer cases. */
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
if ((intptr_t)buffer & 3) {
while (left > 3) {
data = buffer[0] +
(buffer[1] << 8) +
(buffer[2] << 16) +
(buffer[3] << 24);
left -= 4;
buffer += 4;
WR4(slot, SDHCI_BUFFER, data);
}
} else {
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
WR_MULTI_4(slot, SDHCI_BUFFER,
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
(uint32_t *)buffer, left >> 2);
left &= 3;
}
/* Handle uneven size case. */
if (left > 0) {
while (left > 0) {
data <<= 8;
data += *(buffer++);
left--;
}
WR4(slot, SDHCI_BUFFER, data);
}
}
static void
sdhci_transfer_pio(struct sdhci_slot *slot)
{
/* Read as many blocks as possible. */
if (slot->curcmd->data->flags & MMC_DATA_READ) {
while (RD4(slot, SDHCI_PRESENT_STATE) &
SDHCI_DATA_AVAILABLE) {
sdhci_read_block_pio(slot);
if (slot->offset >= slot->curcmd->data->len)
break;
}
} else {
while (RD4(slot, SDHCI_PRESENT_STATE) &
SDHCI_SPACE_AVAILABLE) {
sdhci_write_block_pio(slot);
if (slot->offset >= slot->curcmd->data->len)
break;
}
}
}
static void
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
sdhci_card_task(void *arg, int pending __unused)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
struct sdhci_slot *slot = arg;
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
device_t d;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
SDHCI_LOCK(slot);
Add a new sdhci interface method, get_card_present(). Many embedded SoC controllers that are (more or less) sdhci-compatible don't implement card detect, and the related values in the PRESENT_STATE register aren't useful. A bridge driver can now implement get_card_present() to read a gpio pin or whatever else is necessary for that system. The default implementation reads the CARD_PRESENT bit from the PRESENT_STATE register, so existing drivers will keep working (or keep not-fully-working, since many drivers right now can't detect card insert/remove).
2017-01-08 02:32:53 +00:00
if (SDHCI_GET_CARD_PRESENT(slot->bus, slot)) {
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#ifdef MMCCAM
if (slot->card_present == 0) {
#else
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
if (slot->dev == NULL) {
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#endif
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* If card is present - attach mmc bus. */
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
if (bootverbose || sdhci_debug)
slot_printf(slot, "Card inserted\n");
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#ifdef MMCCAM
slot->card_present = 1;
union ccb *ccb;
uint32_t pathid;
pathid = cam_sim_path(slot->sim);
ccb = xpt_alloc_ccb_nowait();
if (ccb == NULL) {
slot_printf(slot, "Unable to alloc CCB for rescan\n");
SDHCI_UNLOCK(slot);
return;
}
/*
* We create a rescan request for BUS:0:0, since the card
* will be at lun 0.
*/
if (xpt_create_path(&ccb->ccb_h.path, NULL, pathid,
/* target */ 0, /* lun */ 0) != CAM_REQ_CMP) {
slot_printf(slot, "Unable to create path for rescan\n");
SDHCI_UNLOCK(slot);
xpt_free_ccb(ccb);
return;
}
SDHCI_UNLOCK(slot);
xpt_rescan(ccb);
#else
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
d = slot->dev = device_add_child(slot->bus, "mmc", -1);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
SDHCI_UNLOCK(slot);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (d) {
device_set_ivars(d, slot);
(void)device_probe_and_attach(d);
}
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#endif
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
} else
SDHCI_UNLOCK(slot);
} else {
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#ifdef MMCCAM
if (slot->card_present == 1) {
#else
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
if (slot->dev != NULL) {
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#endif
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* If no card present - detach mmc bus. */
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
if (bootverbose || sdhci_debug)
slot_printf(slot, "Card removed\n");
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
d = slot->dev;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->dev = NULL;
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#ifdef MMCCAM
slot->card_present = 0;
union ccb *ccb;
uint32_t pathid;
pathid = cam_sim_path(slot->sim);
ccb = xpt_alloc_ccb_nowait();
if (ccb == NULL) {
slot_printf(slot, "Unable to alloc CCB for rescan\n");
SDHCI_UNLOCK(slot);
return;
}
/*
* We create a rescan request for BUS:0:0, since the card
* will be at lun 0.
*/
if (xpt_create_path(&ccb->ccb_h.path, NULL, pathid,
/* target */ 0, /* lun */ 0) != CAM_REQ_CMP) {
slot_printf(slot, "Unable to create path for rescan\n");
SDHCI_UNLOCK(slot);
xpt_free_ccb(ccb);
return;
}
SDHCI_UNLOCK(slot);
xpt_rescan(ccb);
#else
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
slot->intmask &= ~sdhci_tuning_intmask(slot);
- There is no need to keep the tuning error and re-tuning interrupts enabled (though, no interrupt generation enabled for them) all the time as soon as (re-)tuning is supported; only enable them and let them generate interrupts when actually using (re-)tuning. - Also disable all interrupts except SDHCI_INT_DATA_AVAIL ones while executing tuning and not just their signaling.
2017-12-29 12:48:19 +00:00
WR4(slot, SDHCI_INT_ENABLE, slot->intmask);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
slot->opt &= ~SDHCI_TUNING_ENABLED;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
SDHCI_UNLOCK(slot);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
callout_drain(&slot->retune_callout);
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
device_delete_child(slot->bus, d);
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#endif
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
} else
SDHCI_UNLOCK(slot);
}
}
Add sdhci_handle_card_present_locked() that can be called from the interrupt handler which already holds the mutex, and have sdhci_handle_card_present() be just a tiny wrapper that does the locking for external callers. This should fix the recursive locking panics seen on rpi3. Reported by: Shawn Webb
2017-01-09 17:10:50 +00:00
static void
sdhci_handle_card_present_locked(struct sdhci_slot *slot, bool is_present)
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
{
bool was_present;
/*
* If there was no card and now there is one, schedule the task to
* create the child device after a short delay. The delay is to
* debounce the card insert (sometimes the card detect pin stabilizes
* before the other pins have made good contact).
*
* If there was a card present and now it's gone, immediately schedule
* the task to delete the child device. No debouncing -- gone is gone,
* because once power is removed, a full card re-init is needed, and
* that happens by deleting and recreating the child device.
*/
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#ifdef MMCCAM
was_present = slot->card_present;
#else
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
was_present = slot->dev != NULL;
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#endif
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
if (!was_present && is_present) {
taskqueue_enqueue_timeout(taskqueue_swi_giant,
&slot->card_delayed_task, -SDHCI_INSERT_DELAY_TICKS);
} else if (was_present && !is_present) {
taskqueue_enqueue(taskqueue_swi_giant, &slot->card_task);
}
Add sdhci_handle_card_present_locked() that can be called from the interrupt handler which already holds the mutex, and have sdhci_handle_card_present() be just a tiny wrapper that does the locking for external callers. This should fix the recursive locking panics seen on rpi3. Reported by: Shawn Webb
2017-01-09 17:10:50 +00:00
}
void
sdhci_handle_card_present(struct sdhci_slot *slot, bool is_present)
{
SDHCI_LOCK(slot);
sdhci_handle_card_present_locked(slot, is_present);
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
SDHCI_UNLOCK(slot);
}
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
static void
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
sdhci_card_poll(void *arg)
{
struct sdhci_slot *slot = arg;
sdhci_handle_card_present(slot,
SDHCI_GET_CARD_PRESENT(slot->bus, slot));
callout_reset(&slot->card_poll_callout, SDHCI_CARD_PRESENT_TICKS,
sdhci_card_poll, slot);
}
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
sdhci_init_slot(device_t dev, struct sdhci_slot *slot, int num)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
kobjop_desc_t kobj_desc;
kobj_method_t *kobj_method;
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
uint32_t caps, caps2, freq, host_caps;
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int err;
SDHCI_LOCK_INIT(slot);
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
slot->num = num;
slot->bus = dev;
/* Allocate DMA tag. */
err = bus_dma_tag_create(bus_get_dma_tag(dev),
DMA_BLOCK_SIZE, 0, BUS_SPACE_MAXADDR_32BIT,
BUS_SPACE_MAXADDR, NULL, NULL,
DMA_BLOCK_SIZE, 1, DMA_BLOCK_SIZE,
BUS_DMA_ALLOCNOW, NULL, NULL,
&slot->dmatag);
if (err != 0) {
device_printf(dev, "Can't create DMA tag\n");
SDHCI_LOCK_DESTROY(slot);
return (err);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
/* Allocate DMA memory. */
err = bus_dmamem_alloc(slot->dmatag, (void **)&slot->dmamem,
BUS_DMA_NOWAIT, &slot->dmamap);
if (err != 0) {
device_printf(dev, "Can't alloc DMA memory\n");
- Check the slot type capability, set SDHCI_SLOT_{EMBEDDED,NON_REMOVABLE} for embedded slots. Fail in the sdhci(4) initialization for slot type shared, which is completely unsupported by this driver at the moment. [1] For Intel eMMC controllers, taking the embedded slot type into account obsoltes setting SDHCI_QUIRK_ALL_SLOTS_NON_REMOVABLE so remove these quirk entries. - Hide the 1.8 V VDD capability when the slot is detected as non-embedded, as the SDHCI specification explicitly states that 1.8 V VDD is applicable to embedded slots only. [2] - Define some easy bits of the SDHCI specification v4.20. [3] - Don't leak bus_dma(9) resources in failure paths of sdhci_init_slot(). Obtained from: DragonFlyBSD 65704a46 [1], 7ba10b88 [2], 0df14648 [3]
2017-07-26 22:04:23 +00:00
bus_dma_tag_destroy(slot->dmatag);
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
SDHCI_LOCK_DESTROY(slot);
return (err);
}
/* Map the memory. */
err = bus_dmamap_load(slot->dmatag, slot->dmamap,
(void *)slot->dmamem, DMA_BLOCK_SIZE,
sdhci_getaddr, &slot->paddr, 0);
if (err != 0 || slot->paddr == 0) {
device_printf(dev, "Can't load DMA memory\n");
- Check the slot type capability, set SDHCI_SLOT_{EMBEDDED,NON_REMOVABLE} for embedded slots. Fail in the sdhci(4) initialization for slot type shared, which is completely unsupported by this driver at the moment. [1] For Intel eMMC controllers, taking the embedded slot type into account obsoltes setting SDHCI_QUIRK_ALL_SLOTS_NON_REMOVABLE so remove these quirk entries. - Hide the 1.8 V VDD capability when the slot is detected as non-embedded, as the SDHCI specification explicitly states that 1.8 V VDD is applicable to embedded slots only. [2] - Define some easy bits of the SDHCI specification v4.20. [3] - Don't leak bus_dma(9) resources in failure paths of sdhci_init_slot(). Obtained from: DragonFlyBSD 65704a46 [1], 7ba10b88 [2], 0df14648 [3]
2017-07-26 22:04:23 +00:00
bus_dmamem_free(slot->dmatag, slot->dmamem, slot->dmamap);
bus_dma_tag_destroy(slot->dmatag);
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
SDHCI_LOCK_DESTROY(slot);
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
if (err)
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
return (err);
else
return (EFAULT);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
slot->version = (RD2(slot, SDHCI_HOST_VERSION)
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
>> SDHCI_SPEC_VER_SHIFT) & SDHCI_SPEC_VER_MASK;
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
if (slot->quirks & SDHCI_QUIRK_MISSING_CAPS) {
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
caps = slot->caps;
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
caps2 = slot->caps2;
} else {
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
caps = RD4(slot, SDHCI_CAPABILITIES);
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
if (slot->version >= SDHCI_SPEC_300)
caps2 = RD4(slot, SDHCI_CAPABILITIES2);
else
caps2 = 0;
}
- Check the slot type capability, set SDHCI_SLOT_{EMBEDDED,NON_REMOVABLE} for embedded slots. Fail in the sdhci(4) initialization for slot type shared, which is completely unsupported by this driver at the moment. [1] For Intel eMMC controllers, taking the embedded slot type into account obsoltes setting SDHCI_QUIRK_ALL_SLOTS_NON_REMOVABLE so remove these quirk entries. - Hide the 1.8 V VDD capability when the slot is detected as non-embedded, as the SDHCI specification explicitly states that 1.8 V VDD is applicable to embedded slots only. [2] - Define some easy bits of the SDHCI specification v4.20. [3] - Don't leak bus_dma(9) resources in failure paths of sdhci_init_slot(). Obtained from: DragonFlyBSD 65704a46 [1], 7ba10b88 [2], 0df14648 [3]
2017-07-26 22:04:23 +00:00
if (slot->version >= SDHCI_SPEC_300) {
if ((caps & SDHCI_SLOTTYPE_MASK) != SDHCI_SLOTTYPE_REMOVABLE &&
(caps & SDHCI_SLOTTYPE_MASK) != SDHCI_SLOTTYPE_EMBEDDED) {
device_printf(dev,
"Driver doesn't support shared bus slots\n");
bus_dmamap_unload(slot->dmatag, slot->dmamap);
bus_dmamem_free(slot->dmatag, slot->dmamem,
slot->dmamap);
bus_dma_tag_destroy(slot->dmatag);
SDHCI_LOCK_DESTROY(slot);
return (ENXIO);
} else if ((caps & SDHCI_SLOTTYPE_MASK) ==
SDHCI_SLOTTYPE_EMBEDDED) {
slot->opt |= SDHCI_SLOT_EMBEDDED | SDHCI_NON_REMOVABLE;
}
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
/* Calculate base clock frequency. */
- Get proper maximum clock frequency for SDHCI v3.0 and higher
2012-11-30 02:35:13 +00:00
if (slot->version >= SDHCI_SPEC_300)
Allow a hardware driver to pass clock frequencies into the sdhci driver. The sdhci spec says that if the base or timeout clock frequency in the capabilities register is zero, the driver must obtain the frequency "from another source." This change defines that other source to be the low-level hardware driver, which can pre-set the frequencies in slot.max_clk and slot.timeout_clk before calling sdhci_init_slot(). This helps with a growing number of SoCs that have sdhci base clock frequencies that either won't fit into the range allowed by the number of bits available in the capabilities register, or the frequency is runtime- configurable.
2013-08-19 01:29:13 +00:00
freq = (caps & SDHCI_CLOCK_V3_BASE_MASK) >>
SDHCI_CLOCK_BASE_SHIFT;
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
else
Allow a hardware driver to pass clock frequencies into the sdhci driver. The sdhci spec says that if the base or timeout clock frequency in the capabilities register is zero, the driver must obtain the frequency "from another source." This change defines that other source to be the low-level hardware driver, which can pre-set the frequencies in slot.max_clk and slot.timeout_clk before calling sdhci_init_slot(). This helps with a growing number of SoCs that have sdhci base clock frequencies that either won't fit into the range allowed by the number of bits available in the capabilities register, or the frequency is runtime- configurable.
2013-08-19 01:29:13 +00:00
freq = (caps & SDHCI_CLOCK_BASE_MASK) >>
SDHCI_CLOCK_BASE_SHIFT;
if (freq != 0)
slot->max_clk = freq * 1000000;
/*
* If the frequency wasn't in the capabilities and the hardware driver
* hasn't already set max_clk we're probably not going to work right
* with an assumption, so complain about it.
*/
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
if (slot->max_clk == 0) {
Allow a hardware driver to pass clock frequencies into the sdhci driver. The sdhci spec says that if the base or timeout clock frequency in the capabilities register is zero, the driver must obtain the frequency "from another source." This change defines that other source to be the low-level hardware driver, which can pre-set the frequencies in slot.max_clk and slot.timeout_clk before calling sdhci_init_slot(). This helps with a growing number of SoCs that have sdhci base clock frequencies that either won't fit into the range allowed by the number of bits available in the capabilities register, or the frequency is runtime- configurable.
2013-08-19 01:29:13 +00:00
slot->max_clk = SDHCI_DEFAULT_MAX_FREQ * 1000000;
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
device_printf(dev, "Hardware doesn't specify base clock "
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
"frequency, using %dMHz as default.\n",
SDHCI_DEFAULT_MAX_FREQ);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
- Add support for Intel Apollo Lake and Bay Trail eMMC controllers. Besides slots always having non-removable media, these HCIs require a custom hardware reset sequence after power-up. - Flesh out the support for Intel Braswell eMMC controllers further. Apart from also requiring said reset code, the timeout clock needs to be hardcoded to 1 MHz for these. Both the special reset and timeout clock handlings are implemented as global sdhci(4) quirks as the same treatment will be necessary for Intel eMMC controllers attached via ACPI (once sdhci(4) grows such a front-end). - In sdhci_init_slot(), use the right capability field for determining the announced bus width based on MMC_CAP_*_BIT_DATA. - Correct inverted sdhci_pci_softc member comments added in r276469. [1] Submitted by: Anton Yuzhaninov [1] MFC after: 5 days
2017-01-09 17:07:13 +00:00
/* Calculate/set timeout clock frequency. */
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) {
slot->timeout_clk = slot->max_clk / 1000;
- Add support for Intel Apollo Lake and Bay Trail eMMC controllers. Besides slots always having non-removable media, these HCIs require a custom hardware reset sequence after power-up. - Flesh out the support for Intel Braswell eMMC controllers further. Apart from also requiring said reset code, the timeout clock needs to be hardcoded to 1 MHz for these. Both the special reset and timeout clock handlings are implemented as global sdhci(4) quirks as the same treatment will be necessary for Intel eMMC controllers attached via ACPI (once sdhci(4) grows such a front-end). - In sdhci_init_slot(), use the right capability field for determining the announced bus width based on MMC_CAP_*_BIT_DATA. - Correct inverted sdhci_pci_softc member comments added in r276469. [1] Submitted by: Anton Yuzhaninov [1] MFC after: 5 days
2017-01-09 17:07:13 +00:00
} else if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_1MHZ) {
slot->timeout_clk = 1000;
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
} else {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
slot->timeout_clk = (caps & SDHCI_TIMEOUT_CLK_MASK) >>
SDHCI_TIMEOUT_CLK_SHIFT;
Add new quirks: - Data timeout is broken - Data timeout uses SD clock - Capabilities register is unavailable Add calculations for clock divisor for SDHCI 3.0
2012-10-29 17:21:58 +00:00
if (caps & SDHCI_TIMEOUT_CLK_UNIT)
slot->timeout_clk *= 1000;
}
Allow a hardware driver to pass clock frequencies into the sdhci driver. The sdhci spec says that if the base or timeout clock frequency in the capabilities register is zero, the driver must obtain the frequency "from another source." This change defines that other source to be the low-level hardware driver, which can pre-set the frequencies in slot.max_clk and slot.timeout_clk before calling sdhci_init_slot(). This helps with a growing number of SoCs that have sdhci base clock frequencies that either won't fit into the range allowed by the number of bits available in the capabilities register, or the frequency is runtime- configurable.
2013-08-19 01:29:13 +00:00
/*
* If the frequency wasn't in the capabilities and the hardware driver
* hasn't already set timeout_clk we'll probably work okay using the
* max timeout, but still mention it.
*/
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
if (slot->timeout_clk == 0) {
device_printf(dev, "Hardware doesn't specify timeout clock "
When the timeout clock is based on the SD clock, the timeout counter has to be recalculated every time the SD clock frequency changes. Also, tidy up the counter calculation... it makes no sense to calculate a value one larger than the limit, then whine that it's too large and truncate it to the limit. If the BROKEN_TIMEOUT quirk is set, don't calculate the counter at all, just set it to the limit value.
2013-08-16 19:40:00 +00:00
"frequency, setting BROKEN_TIMEOUT quirk.\n");
slot->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
Various timing-related fixes: - Replace divisor numbers with more descirptive names - Properly calculate minimum frequency for SDHCI 3.0 - Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock - Add min_freq method to sdhci_if.m and provide default implementation. By re-implementing this method hardware drivers can control frequency controller operates when executing initialization sequence
2013-02-16 23:12:06 +00:00
slot->host.f_min = SDHCI_MIN_FREQ(slot->bus, slot);
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
slot->host.f_max = slot->max_clk;
slot->host.host_ocr = 0;
if (caps & SDHCI_CAN_VDD_330)
slot->host.host_ocr |= MMC_OCR_320_330 | MMC_OCR_330_340;
if (caps & SDHCI_CAN_VDD_300)
slot->host.host_ocr |= MMC_OCR_290_300 | MMC_OCR_300_310;
- Check the slot type capability, set SDHCI_SLOT_{EMBEDDED,NON_REMOVABLE} for embedded slots. Fail in the sdhci(4) initialization for slot type shared, which is completely unsupported by this driver at the moment. [1] For Intel eMMC controllers, taking the embedded slot type into account obsoltes setting SDHCI_QUIRK_ALL_SLOTS_NON_REMOVABLE so remove these quirk entries. - Hide the 1.8 V VDD capability when the slot is detected as non-embedded, as the SDHCI specification explicitly states that 1.8 V VDD is applicable to embedded slots only. [2] - Define some easy bits of the SDHCI specification v4.20. [3] - Don't leak bus_dma(9) resources in failure paths of sdhci_init_slot(). Obtained from: DragonFlyBSD 65704a46 [1], 7ba10b88 [2], 0df14648 [3]
2017-07-26 22:04:23 +00:00
/* 1.8V VDD is not supposed to be used for removable cards. */
if ((caps & SDHCI_CAN_VDD_180) && (slot->opt & SDHCI_SLOT_EMBEDDED))
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
slot->host.host_ocr |= MMC_OCR_LOW_VOLTAGE;
if (slot->host.host_ocr == 0) {
device_printf(dev, "Hardware doesn't report any "
"support voltages.\n");
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
host_caps = MMC_CAP_4_BIT_DATA;
Detect, report and use 8-bit bus if is available. Differential Revision: https://reviews.freebsd.org/D1921 Submitted by: Michal Meloun
2015-02-27 15:47:30 +00:00
if (caps & SDHCI_CAN_DO_8BITBUS)
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
host_caps |= MMC_CAP_8_BIT_DATA;
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
if (caps & SDHCI_CAN_DO_HISPD)
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
host_caps |= MMC_CAP_HSPEED;
- Add support for eMMC "partitions". Besides the user data area, i. e. the default partition, eMMC v4.41 and later devices can additionally provide up to: 1 enhanced user data area partition 2 boot partitions 1 RPMB (Replay Protected Memory Block) partition 4 general purpose partitions (optionally with a enhanced or extended attribute) Of these "partitions", only the enhanced user data area one actually slices the user data area partition and, thus, gets handled with the help of geom_flashmap(4). The other types of partitions have address space independent from the default partition and need to be switched to via CMD6 (SWITCH), i. e. constitute a set of additional "disks". The second kind of these "partitions" doesn't fit that well into the design of mmc(4) and mmcsd(4). I've decided to let mmcsd(4) hook all of these "partitions" up as disk(9)'s (except for the RPMB partition as it didn't seem to make much sense to be able to put a file-system there and may require authentication; therefore, RPMB partitions are solely accessible via the newly added IOCTL interface currently; see also below). This approach for one resulted in cleaner code. Second, it retains the notion of mmcsd(4) children corresponding to a single physical device each. With the addition of some layering violations, it also would have been possible for mmc(4) to add separate mmcsd(4) instances with one disk each for all of these "partitions", however. Still, both mmc(4) and mmcsd(4) share some common code now e. g. for issuing CMD6, which has been factored out into mmc_subr.c. Besides simply subdividing eMMC devices, some Intel NUCs having UEFI code in the boot partitions etc., another use case for the partition support is the activation of pseudo-SLC mode, which manufacturers of eMMC chips typically associate with the enhanced user data area and/ or the enhanced attribute of general purpose partitions. CAVEAT EMPTOR: Partitioning eMMC devices is a one-time operation. - Now that properly issuing CMD6 is crucial (so data isn't written to the wrong partition for example), make a step into the direction of correctly handling the timeout for these commands in the MMC layer. Also, do a SEND_STATUS when CMD6 is invoked with an R1B response as recommended by relevant specifications. However, quite some work is left to be done in this regard; all other R1B-type commands done by the MMC layer also should be followed by a SEND_STATUS (CMD13), the erase timeout calculations/handling as documented in specifications are entirely ignored so far, the MMC layer doesn't provide timeouts applicable up to the bridge drivers and at least sdhci(4) currently is hardcoding 1 s as timeout for all command types unconditionally. Let alone already available return codes often not being checked in the MMC layer ... - Add an IOCTL interface to mmcsd(4); this is sufficiently compatible with Linux so that the GNU mmc-utils can be ported to and used with FreeBSD (note that due to the remaining deficiencies outlined above SANITIZE operations issued by/with `mmc` currently most likely will fail). These latter will be added to ports as sysutils/mmc-utils in a bit. Among others, the `mmc` tool of the GNU mmc-utils allows for partitioning eMMC devices (tested working). - For devices following the eMMC specification v4.41 or later, year 0 is 2013 rather than 1997; so correct this for assembling the device ID string properly. - Let mmcsd.ko depend on mmc.ko. Additionally, bump MMC_VERSION as at least for some of the above a matching pair is required. - In the ACPI front-end of sdhci(4) describe the Intel eMMC and SDXC controllers as such in order to match the PCI one. Additionally, in the entry for the 80860F14 SDXC controller remove the eMMC-only SDHCI_QUIRK_INTEL_POWER_UP_RESET. OKed by: imp Submitted by: ian (mmc_switch_status() implementation)
2017-03-16 22:23:04 +00:00
if (slot->quirks & SDHCI_QUIRK_BOOT_NOACC)
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
host_caps |= MMC_CAP_BOOT_NOACC;
- Add support for eMMC "partitions". Besides the user data area, i. e. the default partition, eMMC v4.41 and later devices can additionally provide up to: 1 enhanced user data area partition 2 boot partitions 1 RPMB (Replay Protected Memory Block) partition 4 general purpose partitions (optionally with a enhanced or extended attribute) Of these "partitions", only the enhanced user data area one actually slices the user data area partition and, thus, gets handled with the help of geom_flashmap(4). The other types of partitions have address space independent from the default partition and need to be switched to via CMD6 (SWITCH), i. e. constitute a set of additional "disks". The second kind of these "partitions" doesn't fit that well into the design of mmc(4) and mmcsd(4). I've decided to let mmcsd(4) hook all of these "partitions" up as disk(9)'s (except for the RPMB partition as it didn't seem to make much sense to be able to put a file-system there and may require authentication; therefore, RPMB partitions are solely accessible via the newly added IOCTL interface currently; see also below). This approach for one resulted in cleaner code. Second, it retains the notion of mmcsd(4) children corresponding to a single physical device each. With the addition of some layering violations, it also would have been possible for mmc(4) to add separate mmcsd(4) instances with one disk each for all of these "partitions", however. Still, both mmc(4) and mmcsd(4) share some common code now e. g. for issuing CMD6, which has been factored out into mmc_subr.c. Besides simply subdividing eMMC devices, some Intel NUCs having UEFI code in the boot partitions etc., another use case for the partition support is the activation of pseudo-SLC mode, which manufacturers of eMMC chips typically associate with the enhanced user data area and/ or the enhanced attribute of general purpose partitions. CAVEAT EMPTOR: Partitioning eMMC devices is a one-time operation. - Now that properly issuing CMD6 is crucial (so data isn't written to the wrong partition for example), make a step into the direction of correctly handling the timeout for these commands in the MMC layer. Also, do a SEND_STATUS when CMD6 is invoked with an R1B response as recommended by relevant specifications. However, quite some work is left to be done in this regard; all other R1B-type commands done by the MMC layer also should be followed by a SEND_STATUS (CMD13), the erase timeout calculations/handling as documented in specifications are entirely ignored so far, the MMC layer doesn't provide timeouts applicable up to the bridge drivers and at least sdhci(4) currently is hardcoding 1 s as timeout for all command types unconditionally. Let alone already available return codes often not being checked in the MMC layer ... - Add an IOCTL interface to mmcsd(4); this is sufficiently compatible with Linux so that the GNU mmc-utils can be ported to and used with FreeBSD (note that due to the remaining deficiencies outlined above SANITIZE operations issued by/with `mmc` currently most likely will fail). These latter will be added to ports as sysutils/mmc-utils in a bit. Among others, the `mmc` tool of the GNU mmc-utils allows for partitioning eMMC devices (tested working). - For devices following the eMMC specification v4.41 or later, year 0 is 2013 rather than 1997; so correct this for assembling the device ID string properly. - Let mmcsd.ko depend on mmc.ko. Additionally, bump MMC_VERSION as at least for some of the above a matching pair is required. - In the ACPI front-end of sdhci(4) describe the Intel eMMC and SDXC controllers as such in order to match the PCI one. Additionally, in the entry for the 80860F14 SDXC controller remove the eMMC-only SDHCI_QUIRK_INTEL_POWER_UP_RESET. OKed by: imp Submitted by: ian (mmc_switch_status() implementation)
2017-03-16 22:23:04 +00:00
if (slot->quirks & SDHCI_QUIRK_WAIT_WHILE_BUSY)
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
host_caps |= MMC_CAP_WAIT_WHILE_BUSY;
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
/* Determine supported UHS-I and eMMC modes. */
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
if (caps2 & (SDHCI_CAN_SDR50 | SDHCI_CAN_SDR104 | SDHCI_CAN_DDR50))
host_caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
if (caps2 & SDHCI_CAN_SDR104) {
host_caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50;
if (!(slot->quirks & SDHCI_QUIRK_BROKEN_MMC_HS200))
host_caps |= MMC_CAP_MMC_HS200;
} else if (caps2 & SDHCI_CAN_SDR50)
host_caps |= MMC_CAP_UHS_SDR50;
if (caps2 & SDHCI_CAN_DDR50 &&
!(slot->quirks & SDHCI_QUIRK_BROKEN_UHS_DDR50))
host_caps |= MMC_CAP_UHS_DDR50;
if (slot->quirks & SDHCI_QUIRK_MMC_DDR52)
host_caps |= MMC_CAP_MMC_DDR52;
if (slot->quirks & SDHCI_QUIRK_CAPS_BIT63_FOR_MMC_HS400 &&
caps2 & SDHCI_CAN_MMC_HS400)
host_caps |= MMC_CAP_MMC_HS400;
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
/*
* Disable UHS-I and eMMC modes if the set_uhs_timing method is the
* default NULL implementation.
*/
kobj_desc = &sdhci_set_uhs_timing_desc;
kobj_method = kobj_lookup_method(((kobj_t)dev)->ops->cls, NULL,
kobj_desc);
if (kobj_method == &kobj_desc->deflt)
host_caps &= ~(MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_DDR50 | MMC_CAP_UHS_SDR104 |
MMC_CAP_MMC_DDR52 | MMC_CAP_MMC_HS200 | MMC_CAP_MMC_HS400);
#define SDHCI_CAP_MODES_TUNING(caps2) \
(((caps2) & SDHCI_TUNE_SDR50 ? MMC_CAP_UHS_SDR50 : 0) | \
MMC_CAP_UHS_DDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_MMC_HS200 | \
MMC_CAP_MMC_HS400)
/*
* Disable UHS-I and eMMC modes that require (re-)tuning if either
* the tune or re-tune method is the default NULL implementation.
*/
kobj_desc = &mmcbr_tune_desc;
kobj_method = kobj_lookup_method(((kobj_t)dev)->ops->cls, NULL,
kobj_desc);
if (kobj_method == &kobj_desc->deflt)
goto no_tuning;
kobj_desc = &mmcbr_retune_desc;
kobj_method = kobj_lookup_method(((kobj_t)dev)->ops->cls, NULL,
kobj_desc);
if (kobj_method == &kobj_desc->deflt) {
no_tuning:
host_caps &= ~(SDHCI_CAP_MODES_TUNING(caps2));
}
/* Allocate tuning structures and determine tuning parameters. */
if (host_caps & SDHCI_CAP_MODES_TUNING(caps2)) {
slot->opt |= SDHCI_TUNING_SUPPORTED;
slot->tune_req = malloc(sizeof(*slot->tune_req), M_DEVBUF,
M_WAITOK);
slot->tune_cmd = malloc(sizeof(*slot->tune_cmd), M_DEVBUF,
M_WAITOK);
slot->tune_data = malloc(sizeof(*slot->tune_data), M_DEVBUF,
M_WAITOK);
if (caps2 & SDHCI_TUNE_SDR50)
slot->opt |= SDHCI_SDR50_NEEDS_TUNING;
slot->retune_mode = (caps2 & SDHCI_RETUNE_MODES_MASK) >>
SDHCI_RETUNE_MODES_SHIFT;
if (slot->retune_mode == SDHCI_RETUNE_MODE_1) {
slot->retune_count = (caps2 & SDHCI_RETUNE_CNT_MASK) >>
SDHCI_RETUNE_CNT_SHIFT;
if (slot->retune_count > 0xb) {
device_printf(dev, "Unknown re-tuning count "
"%x, using 1 sec\n", slot->retune_count);
slot->retune_count = 1;
} else if (slot->retune_count != 0)
slot->retune_count =
1 << (slot->retune_count - 1);
}
}
#undef SDHCI_CAP_MODES_TUNING
/* Determine supported VCCQ signaling levels. */
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
host_caps |= MMC_CAP_SIGNALING_330;
if (host_caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_DDR50 | MMC_CAP_UHS_SDR104 |
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
MMC_CAP_MMC_DDR52_180 | MMC_CAP_MMC_HS200_180 |
MMC_CAP_MMC_HS400_180))
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
host_caps |= MMC_CAP_SIGNALING_120 | MMC_CAP_SIGNALING_180;
/*
* Disable 1.2 V and 1.8 V signaling if the switch_vccq method is the
* default NULL implementation. Disable 1.2 V support if it's the
* generic SDHCI implementation.
*/
kobj_desc = &mmcbr_switch_vccq_desc;
kobj_method = kobj_lookup_method(((kobj_t)dev)->ops->cls, NULL,
kobj_desc);
if (kobj_method == &kobj_desc->deflt)
host_caps &= ~(MMC_CAP_SIGNALING_120 | MMC_CAP_SIGNALING_180);
else if (kobj_method->func == (kobjop_t)sdhci_generic_switch_vccq)
host_caps &= ~MMC_CAP_SIGNALING_120;
/* Determine supported driver types (type B is always mandatory). */
Fix typo in Driver Type A/C/D capability checks in sdhci. Use the SDHCI_CAN_DRIVE_TYPE_A/_C/_D masks to check for Driver Type support, instead of using the SDHCI_CTRL2_DRIVER_TYPE_A/_C/_D values which are meant for setting the Driver Type in the HOST_CONTROL2 register. Approved by: adrian (mentor), jmcneill Differential Revision: https://reviews.freebsd.org/D10999
2017-05-31 19:20:27 +00:00
if (caps2 & SDHCI_CAN_DRIVE_TYPE_A)
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
host_caps |= MMC_CAP_DRIVER_TYPE_A;
Fix typo in Driver Type A/C/D capability checks in sdhci. Use the SDHCI_CAN_DRIVE_TYPE_A/_C/_D masks to check for Driver Type support, instead of using the SDHCI_CTRL2_DRIVER_TYPE_A/_C/_D values which are meant for setting the Driver Type in the HOST_CONTROL2 register. Approved by: adrian (mentor), jmcneill Differential Revision: https://reviews.freebsd.org/D10999
2017-05-31 19:20:27 +00:00
if (caps2 & SDHCI_CAN_DRIVE_TYPE_C)
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
host_caps |= MMC_CAP_DRIVER_TYPE_C;
Fix typo in Driver Type A/C/D capability checks in sdhci. Use the SDHCI_CAN_DRIVE_TYPE_A/_C/_D masks to check for Driver Type support, instead of using the SDHCI_CTRL2_DRIVER_TYPE_A/_C/_D values which are meant for setting the Driver Type in the HOST_CONTROL2 register. Approved by: adrian (mentor), jmcneill Differential Revision: https://reviews.freebsd.org/D10999
2017-05-31 19:20:27 +00:00
if (caps2 & SDHCI_CAN_DRIVE_TYPE_D)
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
host_caps |= MMC_CAP_DRIVER_TYPE_D;
slot->host.caps = host_caps;
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
/* Decide if we have usable DMA. */
if (caps & SDHCI_CAN_DO_DMA)
slot->opt |= SDHCI_HAVE_DMA;
if (slot->quirks & SDHCI_QUIRK_BROKEN_DMA)
slot->opt &= ~SDHCI_HAVE_DMA;
if (slot->quirks & SDHCI_QUIRK_FORCE_DMA)
slot->opt |= SDHCI_HAVE_DMA;
- Add support for Intel Apollo Lake and Bay Trail eMMC controllers. Besides slots always having non-removable media, these HCIs require a custom hardware reset sequence after power-up. - Flesh out the support for Intel Braswell eMMC controllers further. Apart from also requiring said reset code, the timeout clock needs to be hardcoded to 1 MHz for these. Both the special reset and timeout clock handlings are implemented as global sdhci(4) quirks as the same treatment will be necessary for Intel eMMC controllers attached via ACPI (once sdhci(4) grows such a front-end). - In sdhci_init_slot(), use the right capability field for determining the announced bus width based on MMC_CAP_*_BIT_DATA. - Correct inverted sdhci_pci_softc member comments added in r276469. [1] Submitted by: Anton Yuzhaninov [1] MFC after: 5 days
2017-01-09 17:07:13 +00:00
if (slot->quirks & SDHCI_QUIRK_ALL_SLOTS_NON_REMOVABLE)
slot->opt |= SDHCI_NON_REMOVABLE;
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
/*
Add hooks for plugging platform-provided transfer backend. In order to use platorm backend hardware driver should impement three methods: - platform_start_transfer and platform_finish_transfer to start and finish transfer - platform_will_handle - check whether transaction is suitable for backend. If not - driver will fall back to PIO mode. Submitted by: Daisuke Aoyama <aoyama at peach.ne.jp> Approved by: ian@
2013-02-28 19:43:14 +00:00
* Use platform-provided transfer backend
* with PIO as a fallback mechanism
*/
if (slot->opt & SDHCI_PLATFORM_TRANSFER)
slot->opt &= ~SDHCI_HAVE_DMA;
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
if (bootverbose || sdhci_debug) {
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
slot_printf(slot,
- Check the slot type capability, set SDHCI_SLOT_{EMBEDDED,NON_REMOVABLE} for embedded slots. Fail in the sdhci(4) initialization for slot type shared, which is completely unsupported by this driver at the moment. [1] For Intel eMMC controllers, taking the embedded slot type into account obsoltes setting SDHCI_QUIRK_ALL_SLOTS_NON_REMOVABLE so remove these quirk entries. - Hide the 1.8 V VDD capability when the slot is detected as non-embedded, as the SDHCI specification explicitly states that 1.8 V VDD is applicable to embedded slots only. [2] - Define some easy bits of the SDHCI specification v4.20. [3] - Don't leak bus_dma(9) resources in failure paths of sdhci_init_slot(). Obtained from: DragonFlyBSD 65704a46 [1], 7ba10b88 [2], 0df14648 [3]
2017-07-26 22:04:23 +00:00
"%uMHz%s %s VDD:%s%s%s VCCQ: 3.3V%s%s DRV: B%s%s%s %s %s\n",
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
slot->max_clk / 1000000,
(caps & SDHCI_CAN_DO_HISPD) ? " HS" : "",
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
(host_caps & MMC_CAP_8_BIT_DATA) ? "8bits" :
((host_caps & MMC_CAP_4_BIT_DATA) ? "4bits" : "1bit"),
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
(caps & SDHCI_CAN_VDD_330) ? " 3.3V" : "",
(caps & SDHCI_CAN_VDD_300) ? " 3.0V" : "",
- Check the slot type capability, set SDHCI_SLOT_{EMBEDDED,NON_REMOVABLE} for embedded slots. Fail in the sdhci(4) initialization for slot type shared, which is completely unsupported by this driver at the moment. [1] For Intel eMMC controllers, taking the embedded slot type into account obsoltes setting SDHCI_QUIRK_ALL_SLOTS_NON_REMOVABLE so remove these quirk entries. - Hide the 1.8 V VDD capability when the slot is detected as non-embedded, as the SDHCI specification explicitly states that 1.8 V VDD is applicable to embedded slots only. [2] - Define some easy bits of the SDHCI specification v4.20. [3] - Don't leak bus_dma(9) resources in failure paths of sdhci_init_slot(). Obtained from: DragonFlyBSD 65704a46 [1], 7ba10b88 [2], 0df14648 [3]
2017-07-26 22:04:23 +00:00
((caps & SDHCI_CAN_VDD_180) &&
(slot->opt & SDHCI_SLOT_EMBEDDED)) ? " 1.8V" : "",
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
(host_caps & MMC_CAP_SIGNALING_180) ? " 1.8V" : "",
(host_caps & MMC_CAP_SIGNALING_120) ? " 1.2V" : "",
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
(host_caps & MMC_CAP_DRIVER_TYPE_A) ? "A" : "",
(host_caps & MMC_CAP_DRIVER_TYPE_C) ? "C" : "",
(host_caps & MMC_CAP_DRIVER_TYPE_D) ? "D" : "",
- Check the slot type capability, set SDHCI_SLOT_{EMBEDDED,NON_REMOVABLE} for embedded slots. Fail in the sdhci(4) initialization for slot type shared, which is completely unsupported by this driver at the moment. [1] For Intel eMMC controllers, taking the embedded slot type into account obsoltes setting SDHCI_QUIRK_ALL_SLOTS_NON_REMOVABLE so remove these quirk entries. - Hide the 1.8 V VDD capability when the slot is detected as non-embedded, as the SDHCI specification explicitly states that 1.8 V VDD is applicable to embedded slots only. [2] - Define some easy bits of the SDHCI specification v4.20. [3] - Don't leak bus_dma(9) resources in failure paths of sdhci_init_slot(). Obtained from: DragonFlyBSD 65704a46 [1], 7ba10b88 [2], 0df14648 [3]
2017-07-26 22:04:23 +00:00
(slot->opt & SDHCI_HAVE_DMA) ? "DMA" : "PIO",
(slot->opt & SDHCI_SLOT_EMBEDDED) ? "embedded" :
(slot->opt & SDHCI_NON_REMOVABLE) ? "non-removable" :
"removable");
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
if (host_caps & (MMC_CAP_MMC_DDR52 | MMC_CAP_MMC_HS200 |
MMC_CAP_MMC_HS400 | MMC_CAP_MMC_ENH_STROBE))
slot_printf(slot, "eMMC:%s%s%s%s\n",
(host_caps & MMC_CAP_MMC_DDR52) ? " DDR52" : "",
(host_caps & MMC_CAP_MMC_HS200) ? " HS200" : "",
(host_caps & MMC_CAP_MMC_HS400) ? " HS400" : "",
((host_caps &
(MMC_CAP_MMC_HS400 | MMC_CAP_MMC_ENH_STROBE)) ==
(MMC_CAP_MMC_HS400 | MMC_CAP_MMC_ENH_STROBE)) ?
" HS400ES" : "");
if (host_caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104))
slot_printf(slot, "UHS-I:%s%s%s%s%s\n",
(host_caps & MMC_CAP_UHS_SDR12) ? " SDR12" : "",
(host_caps & MMC_CAP_UHS_SDR25) ? " SDR25" : "",
(host_caps & MMC_CAP_UHS_SDR50) ? " SDR50" : "",
(host_caps & MMC_CAP_UHS_SDR104) ? " SDR104" : "",
(host_caps & MMC_CAP_UHS_DDR50) ? " DDR50" : "");
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (slot->opt & SDHCI_TUNING_SUPPORTED)
slot_printf(slot, "Re-tuning count %d secs, mode %d\n",
slot->retune_count, slot->retune_mode + 1);
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
sdhci_dumpregs(slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
Raise the SDHCI timeout to 10 seconds and add a sysctl to allow changing this value at runtime. The SD card specification says that a block write or a block erase can take up to 250ms to complete and thus, under some circumstances, the existent 2 seconds timeout was triggering with normal usage. This change fixes the sporadic controller timeout that happens on RPi and RPi 2. Discussed with: ian (some time ago)
2015-05-21 20:09:36 +00:00
slot->timeout = 10;
SYSCTL_ADD_INT(device_get_sysctl_ctx(slot->bus),
SYSCTL_CHILDREN(device_get_sysctl_tree(slot->bus)), OID_AUTO,
"timeout", CTLFLAG_RW, &slot->timeout, 0,
"Maximum timeout for SDHCI transfers (in secs)");
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
TASK_INIT(&slot->card_task, 0, sdhci_card_task, slot);
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
TIMEOUT_TASK_INIT(taskqueue_swi_giant, &slot->card_delayed_task, 0,
sdhci_card_task, slot);
callout_init(&slot->card_poll_callout, 1);
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
callout_init_mtx(&slot->timeout_callout, &slot->mtx, 0);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
callout_init_mtx(&slot->retune_callout, &slot->mtx, 0);
Raise the SDHCI timeout to 10 seconds and add a sysctl to allow changing this value at runtime. The SD card specification says that a block write or a block erase can take up to 250ms to complete and thus, under some circumstances, the existent 2 seconds timeout was triggering with normal usage. This change fixes the sporadic controller timeout that happens on RPi and RPi 2. Discussed with: ian (some time ago)
2015-05-21 20:09:36 +00:00
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
if ((slot->quirks & SDHCI_QUIRK_POLL_CARD_PRESENT) &&
!(slot->opt & SDHCI_NON_REMOVABLE)) {
callout_reset(&slot->card_poll_callout,
SDHCI_CARD_PRESENT_TICKS, sdhci_card_poll, slot);
}
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
sdhci_init(slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
return (0);
}
Rename sdhci_cam_start_slot() into sdhci_start_slot() This change allows to just call sdhci_start_slot() in SDHCI drivers and not to think about which stack handles the operation. As a side effect, this will also fix MMCCAM with sdhci_acpi driver. Approved by: imp (mentor) Differential Revision: https://reviews.freebsd.org/D12471
2017-09-24 09:05:35 +00:00
#ifndef MMCCAM
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
void
sdhci_start_slot(struct sdhci_slot *slot)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
sdhci_card_task(slot, 0);
}
Rename sdhci_cam_start_slot() into sdhci_start_slot() This change allows to just call sdhci_start_slot() in SDHCI drivers and not to think about which stack handles the operation. As a side effect, this will also fix MMCCAM with sdhci_acpi driver. Approved by: imp (mentor) Differential Revision: https://reviews.freebsd.org/D12471
2017-09-24 09:05:35 +00:00
#endif
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
sdhci_cleanup_slot(struct sdhci_slot *slot)
{
device_t d;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
callout_drain(&slot->timeout_callout);
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
callout_drain(&slot->card_poll_callout);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
callout_drain(&slot->retune_callout);
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
taskqueue_drain(taskqueue_swi_giant, &slot->card_task);
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
taskqueue_drain_timeout(taskqueue_swi_giant, &slot->card_delayed_task);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
SDHCI_LOCK(slot);
d = slot->dev;
slot->dev = NULL;
SDHCI_UNLOCK(slot);
if (d != NULL)
device_delete_child(slot->bus, d);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
SDHCI_LOCK(slot);
sdhci_reset(slot, SDHCI_RESET_ALL);
SDHCI_UNLOCK(slot);
bus_dmamap_unload(slot->dmatag, slot->dmamap);
bus_dmamem_free(slot->dmatag, slot->dmamem, slot->dmamap);
bus_dma_tag_destroy(slot->dmatag);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (slot->opt & SDHCI_TUNING_SUPPORTED) {
free(slot->tune_req, M_DEVBUF);
free(slot->tune_cmd, M_DEVBUF);
free(slot->tune_data, M_DEVBUF);
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
SDHCI_LOCK_DESTROY(slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
return (0);
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
sdhci_generic_suspend(struct sdhci_slot *slot)
Add controller suspend/resume support. To be able to correctly suspend/resume with card inserted, respective support should be also implemented at mmc and mmcsd layers.
2008-12-01 17:45:56 +00:00
{
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
/*
* We expect the MMC layer to issue initial tuning after resume.
* Otherwise, we'd need to indicate re-tuning including circuit reset
* being required at least for re-tuning modes 1 and 2 ourselves.
*/
callout_drain(&slot->retune_callout);
SDHCI_LOCK(slot);
slot->opt &= ~SDHCI_TUNING_ENABLED;
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
sdhci_reset(slot, SDHCI_RESET_ALL);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
SDHCI_UNLOCK(slot);
Add controller suspend/resume support. To be able to correctly suspend/resume with card inserted, respective support should be also implemented at mmc and mmcsd layers.
2008-12-01 17:45:56 +00:00
return (0);
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
sdhci_generic_resume(struct sdhci_slot *slot)
Add controller suspend/resume support. To be able to correctly suspend/resume with card inserted, respective support should be also implemented at mmc and mmcsd layers.
2008-12-01 17:45:56 +00:00
{
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
SDHCI_LOCK(slot);
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
sdhci_init(slot);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
SDHCI_UNLOCK(slot);
Add controller suspend/resume support. To be able to correctly suspend/resume with card inserted, respective support should be also implemented at mmc and mmcsd layers.
2008-12-01 17:45:56 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
return (0);
Add controller suspend/resume support. To be able to correctly suspend/resume with card inserted, respective support should be also implemented at mmc and mmcsd layers.
2008-12-01 17:45:56 +00:00
}
Various timing-related fixes: - Replace divisor numbers with more descirptive names - Properly calculate minimum frequency for SDHCI 3.0 - Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock - Add min_freq method to sdhci_if.m and provide default implementation. By re-implementing this method hardware drivers can control frequency controller operates when executing initialization sequence
2013-02-16 23:12:06 +00:00
uint32_t
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
sdhci_generic_min_freq(device_t brdev __unused, struct sdhci_slot *slot)
Various timing-related fixes: - Replace divisor numbers with more descirptive names - Properly calculate minimum frequency for SDHCI 3.0 - Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock - Add min_freq method to sdhci_if.m and provide default implementation. By re-implementing this method hardware drivers can control frequency controller operates when executing initialization sequence
2013-02-16 23:12:06 +00:00
{
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
Various timing-related fixes: - Replace divisor numbers with more descirptive names - Properly calculate minimum frequency for SDHCI 3.0 - Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock - Add min_freq method to sdhci_if.m and provide default implementation. By re-implementing this method hardware drivers can control frequency controller operates when executing initialization sequence
2013-02-16 23:12:06 +00:00
if (slot->version >= SDHCI_SPEC_300)
return (slot->max_clk / SDHCI_300_MAX_DIVIDER);
else
return (slot->max_clk / SDHCI_200_MAX_DIVIDER);
}
Add a new sdhci interface method, get_card_present(). Many embedded SoC controllers that are (more or less) sdhci-compatible don't implement card detect, and the related values in the PRESENT_STATE register aren't useful. A bridge driver can now implement get_card_present() to read a gpio pin or whatever else is necessary for that system. The default implementation reads the CARD_PRESENT bit from the PRESENT_STATE register, so existing drivers will keep working (or keep not-fully-working, since many drivers right now can't detect card insert/remove).
2017-01-08 02:32:53 +00:00
bool
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
sdhci_generic_get_card_present(device_t brdev __unused, struct sdhci_slot *slot)
Add a new sdhci interface method, get_card_present(). Many embedded SoC controllers that are (more or less) sdhci-compatible don't implement card detect, and the related values in the PRESENT_STATE register aren't useful. A bridge driver can now implement get_card_present() to read a gpio pin or whatever else is necessary for that system. The default implementation reads the CARD_PRESENT bit from the PRESENT_STATE register, so existing drivers will keep working (or keep not-fully-working, since many drivers right now can't detect card insert/remove).
2017-01-08 02:32:53 +00:00
{
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
if (slot->opt & SDHCI_NON_REMOVABLE)
return true;
Add a new sdhci interface method, get_card_present(). Many embedded SoC controllers that are (more or less) sdhci-compatible don't implement card detect, and the related values in the PRESENT_STATE register aren't useful. A bridge driver can now implement get_card_present() to read a gpio pin or whatever else is necessary for that system. The default implementation reads the CARD_PRESENT bit from the PRESENT_STATE register, so existing drivers will keep working (or keep not-fully-working, since many drivers right now can't detect card insert/remove).
2017-01-08 02:32:53 +00:00
return (RD4(slot, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
}
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
void
sdhci_generic_set_uhs_timing(device_t brdev __unused, struct sdhci_slot *slot)
{
struct mmc_ios *ios;
uint16_t hostctrl2;
if (slot->version < SDHCI_SPEC_300)
return;
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
SDHCI_ASSERT_LOCKED(slot);
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
ios = &slot->host.ios;
sdhci_set_clock(slot, 0);
hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2);
hostctrl2 &= ~SDHCI_CTRL2_UHS_MASK;
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (ios->clock > SD_SDR50_MAX) {
if (ios->timing == bus_timing_mmc_hs400 ||
ios->timing == bus_timing_mmc_hs400es)
hostctrl2 |= SDHCI_CTRL2_MMC_HS400;
else
hostctrl2 |= SDHCI_CTRL2_UHS_SDR104;
}
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
else if (ios->clock > SD_SDR25_MAX)
hostctrl2 |= SDHCI_CTRL2_UHS_SDR50;
else if (ios->clock > SD_SDR12_MAX) {
if (ios->timing == bus_timing_uhs_ddr50 ||
ios->timing == bus_timing_mmc_ddr52)
hostctrl2 |= SDHCI_CTRL2_UHS_DDR50;
else
hostctrl2 |= SDHCI_CTRL2_UHS_SDR25;
} else if (ios->clock > SD_MMC_CARD_ID_FREQUENCY)
hostctrl2 |= SDHCI_CTRL2_UHS_SDR12;
WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2);
sdhci_set_clock(slot, ios->clock);
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
sdhci_generic_update_ios(device_t brdev, device_t reqdev)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
struct mmc_ios *ios = &slot->host.ios;
SDHCI_LOCK(slot);
/* Do full reset on bus power down to clear from any state. */
if (ios->power_mode == power_off) {
WR4(slot, SDHCI_SIGNAL_ENABLE, 0);
sdhci_init(slot);
}
/* Configure the bus. */
sdhci_set_clock(slot, ios->clock);
Detect, report and use 8-bit bus if is available. Differential Revision: https://reviews.freebsd.org/D1921 Submitted by: Michal Meloun
2015-02-27 15:47:30 +00:00
sdhci_set_power(slot, (ios->power_mode == power_off) ? 0 : ios->vdd);
if (ios->bus_width == bus_width_8) {
slot->hostctrl |= SDHCI_CTRL_8BITBUS;
slot->hostctrl &= ~SDHCI_CTRL_4BITBUS;
} else if (ios->bus_width == bus_width_4) {
slot->hostctrl &= ~SDHCI_CTRL_8BITBUS;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->hostctrl |= SDHCI_CTRL_4BITBUS;
Detect, report and use 8-bit bus if is available. Differential Revision: https://reviews.freebsd.org/D1921 Submitted by: Michal Meloun
2015-02-27 15:47:30 +00:00
} else if (ios->bus_width == bus_width_1) {
slot->hostctrl &= ~SDHCI_CTRL_8BITBUS;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->hostctrl &= ~SDHCI_CTRL_4BITBUS;
Detect, report and use 8-bit bus if is available. Differential Revision: https://reviews.freebsd.org/D1921 Submitted by: Michal Meloun
2015-02-27 15:47:30 +00:00
} else {
panic("Invalid bus width: %d", ios->bus_width);
}
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
if (ios->clock > SD_SDR12_MAX &&
Add a new SDHCI quirk, SDHCI_QUIRK_DONT_SET_HISPD_BIT. Apparently some sdhci controllers, such as the one on a Raspberry Pi, mishandle the signal timing in high speed signaling mode, but run just fine in standard mode with the bus running at frequencies between 25-50MHz (which shouldn't work). This is the solution adopted by U-Boot and other OSes (linux and *BSD) for the timeouts on Raspberry Pi boards with certain SD cards. Some research shows that this quirk is also used on a few other boards, so the fix is a generic quirk instead of being in the RPi-specific driver code. This change is based on information discovered by Michal Meloun.
2015-01-17 19:57:03 +00:00
!(slot->quirks & SDHCI_QUIRK_DONT_SET_HISPD_BIT))
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->hostctrl |= SDHCI_CTRL_HISPD;
else
slot->hostctrl &= ~SDHCI_CTRL_HISPD;
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl);
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
SDHCI_SET_UHS_TIMING(brdev, slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* Some controllers like reset after bus changes. */
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
if (slot->quirks & SDHCI_QUIRK_RESET_ON_IOS)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
sdhci_reset(slot, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
SDHCI_UNLOCK(slot);
return (0);
}
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
int
sdhci_generic_switch_vccq(device_t brdev __unused, device_t reqdev)
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
enum mmc_vccq vccq;
int err;
uint16_t hostctrl2;
if (slot->version < SDHCI_SPEC_300)
return (0);
err = 0;
vccq = slot->host.ios.vccq;
SDHCI_LOCK(slot);
sdhci_set_clock(slot, 0);
hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2);
switch (vccq) {
case vccq_330:
if (!(hostctrl2 & SDHCI_CTRL2_S18_ENABLE))
goto done;
hostctrl2 &= ~SDHCI_CTRL2_S18_ENABLE;
WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2);
DELAY(5000);
hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2);
if (!(hostctrl2 & SDHCI_CTRL2_S18_ENABLE))
goto done;
err = EAGAIN;
break;
case vccq_180:
if (!(slot->host.caps & MMC_CAP_SIGNALING_180)) {
err = EINVAL;
goto done;
}
if (hostctrl2 & SDHCI_CTRL2_S18_ENABLE)
goto done;
hostctrl2 |= SDHCI_CTRL2_S18_ENABLE;
WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2);
DELAY(5000);
hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2);
if (hostctrl2 & SDHCI_CTRL2_S18_ENABLE)
goto done;
err = EAGAIN;
break;
default:
slot_printf(slot,
"Attempt to set unsupported signaling voltage\n");
err = EINVAL;
break;
}
done:
sdhci_set_clock(slot, slot->host.ios.clock);
SDHCI_UNLOCK(slot);
return (err);
}
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
int
sdhci_generic_tune(device_t brdev __unused, device_t reqdev, bool hs400)
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
struct mmc_ios *ios = &slot->host.ios;
struct mmc_command *tune_cmd;
struct mmc_data *tune_data;
uint32_t opcode;
int err;
if (!(slot->opt & SDHCI_TUNING_SUPPORTED))
return (0);
slot->retune_ticks = slot->retune_count * hz;
opcode = MMC_SEND_TUNING_BLOCK;
SDHCI_LOCK(slot);
switch (ios->timing) {
case bus_timing_mmc_hs400:
slot_printf(slot, "HS400 must be tuned in HS200 mode\n");
SDHCI_UNLOCK(slot);
return (EINVAL);
case bus_timing_mmc_hs200:
/*
* In HS400 mode, controllers use the data strobe line to
* latch data from the devices so periodic re-tuning isn't
* expected to be required.
*/
if (hs400)
slot->retune_ticks = 0;
opcode = MMC_SEND_TUNING_BLOCK_HS200;
break;
case bus_timing_uhs_ddr50:
case bus_timing_uhs_sdr104:
break;
case bus_timing_uhs_sdr50:
if (slot->opt & SDHCI_SDR50_NEEDS_TUNING)
break;
/* FALLTHROUGH */
default:
SDHCI_UNLOCK(slot);
return (0);
}
tune_cmd = slot->tune_cmd;
memset(tune_cmd, 0, sizeof(*tune_cmd));
tune_cmd->opcode = opcode;
tune_cmd->flags = MMC_RSP_R1 | MMC_CMD_ADTC;
tune_data = tune_cmd->data = slot->tune_data;
memset(tune_data, 0, sizeof(*tune_data));
tune_data->len = (opcode == MMC_SEND_TUNING_BLOCK_HS200 &&
ios->bus_width == bus_width_8) ? MMC_TUNING_LEN_HS200 :
MMC_TUNING_LEN;
tune_data->flags = MMC_DATA_READ;
tune_data->mrq = tune_cmd->mrq = slot->tune_req;
slot->opt &= ~SDHCI_TUNING_ENABLED;
err = sdhci_exec_tuning(slot, true);
if (err == 0) {
slot->opt |= SDHCI_TUNING_ENABLED;
slot->intmask |= sdhci_tuning_intmask(slot);
- There is no need to keep the tuning error and re-tuning interrupts enabled (though, no interrupt generation enabled for them) all the time as soon as (re-)tuning is supported; only enable them and let them generate interrupts when actually using (re-)tuning. - Also disable all interrupts except SDHCI_INT_DATA_AVAIL ones while executing tuning and not just their signaling.
2017-12-29 12:48:19 +00:00
WR4(slot, SDHCI_INT_ENABLE, slot->intmask);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
if (slot->retune_ticks) {
callout_reset(&slot->retune_callout, slot->retune_ticks,
sdhci_retune, slot);
}
}
SDHCI_UNLOCK(slot);
return (err);
}
int
sdhci_generic_retune(device_t brdev __unused, device_t reqdev, bool reset)
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
int err;
if (!(slot->opt & SDHCI_TUNING_ENABLED))
return (0);
/* HS400 must be tuned in HS200 mode. */
if (slot->host.ios.timing == bus_timing_mmc_hs400)
return (EINVAL);
SDHCI_LOCK(slot);
err = sdhci_exec_tuning(slot, reset);
/*
* There are two ways sdhci_exec_tuning() can fail:
* EBUSY should not actually happen when requests are only issued
* with the host properly acquired, and
* EIO re-tuning failed (but it did work initially).
*
* In both cases, we should retry at later point if periodic re-tuning
* is enabled. Note that due to slot->retune_req not being cleared in
* these failure cases, the MMC layer should trigger another attempt at
* re-tuning with the next request anyway, though.
*/
if (slot->retune_ticks) {
callout_reset(&slot->retune_callout, slot->retune_ticks,
sdhci_retune, slot);
}
SDHCI_UNLOCK(slot);
return (err);
}
static int
sdhci_exec_tuning(struct sdhci_slot *slot, bool reset)
{
struct mmc_request *tune_req;
struct mmc_command *tune_cmd;
int i;
uint32_t intmask;
uint16_t hostctrl2;
u_char opt;
SDHCI_ASSERT_LOCKED(slot);
if (slot->req != NULL)
return (EBUSY);
/* Tuning doesn't work with DMA enabled. */
opt = slot->opt;
slot->opt = opt & ~SDHCI_HAVE_DMA;
/*
* Ensure that as documented, SDHCI_INT_DATA_AVAIL is the only
* kind of interrupt we receive in response to a tuning request.
*/
intmask = slot->intmask;
slot->intmask = SDHCI_INT_DATA_AVAIL;
- There is no need to keep the tuning error and re-tuning interrupts enabled (though, no interrupt generation enabled for them) all the time as soon as (re-)tuning is supported; only enable them and let them generate interrupts when actually using (re-)tuning. - Also disable all interrupts except SDHCI_INT_DATA_AVAIL ones while executing tuning and not just their signaling.
2017-12-29 12:48:19 +00:00
WR4(slot, SDHCI_INT_ENABLE, SDHCI_INT_DATA_AVAIL);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
WR4(slot, SDHCI_SIGNAL_ENABLE, SDHCI_INT_DATA_AVAIL);
hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2);
if (reset)
hostctrl2 &= ~SDHCI_CTRL2_SAMPLING_CLOCK;
else
hostctrl2 |= SDHCI_CTRL2_SAMPLING_CLOCK;
WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2 | SDHCI_CTRL2_EXEC_TUNING);
tune_req = slot->tune_req;
tune_cmd = slot->tune_cmd;
for (i = 0; i < MMC_TUNING_MAX; i++) {
memset(tune_req, 0, sizeof(*tune_req));
tune_req->cmd = tune_cmd;
tune_req->done = sdhci_req_wakeup;
tune_req->done_data = slot;
slot->req = tune_req;
slot->flags = 0;
sdhci_start(slot);
while (!(tune_req->flags & MMC_REQ_DONE))
msleep(tune_req, &slot->mtx, 0, "sdhciet", 0);
if (!(tune_req->flags & MMC_TUNE_DONE))
break;
hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2);
if (!(hostctrl2 & SDHCI_CTRL2_EXEC_TUNING))
break;
if (tune_cmd->opcode == MMC_SEND_TUNING_BLOCK)
DELAY(1000);
}
slot->opt = opt;
slot->intmask = intmask;
- There is no need to keep the tuning error and re-tuning interrupts enabled (though, no interrupt generation enabled for them) all the time as soon as (re-)tuning is supported; only enable them and let them generate interrupts when actually using (re-)tuning. - Also disable all interrupts except SDHCI_INT_DATA_AVAIL ones while executing tuning and not just their signaling.
2017-12-29 12:48:19 +00:00
WR4(slot, SDHCI_INT_ENABLE, intmask);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
WR4(slot, SDHCI_SIGNAL_ENABLE, intmask);
if ((hostctrl2 & (SDHCI_CTRL2_EXEC_TUNING |
SDHCI_CTRL2_SAMPLING_CLOCK)) == SDHCI_CTRL2_SAMPLING_CLOCK) {
slot->retune_req = 0;
return (0);
}
slot_printf(slot, "Tuning failed, using fixed sampling clock\n");
WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2 & ~(SDHCI_CTRL2_EXEC_TUNING |
SDHCI_CTRL2_SAMPLING_CLOCK));
sdhci_reset(slot, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
return (EIO);
}
static void
sdhci_retune(void *arg)
{
struct sdhci_slot *slot = arg;
slot->retune_req |= SDHCI_RETUNE_REQ_NEEDED;
}
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#ifdef MMCCAM
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
static void
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
sdhci_req_done(struct sdhci_slot *slot)
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
{
union ccb *ccb;
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 1))
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
slot_printf(slot, "%s\n", __func__);
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
if (slot->ccb != NULL && slot->curcmd != NULL) {
callout_stop(&slot->timeout_callout);
ccb = slot->ccb;
slot->ccb = NULL;
slot->curcmd = NULL;
/* Tell CAM the request is finished */
struct ccb_mmcio *mmcio;
mmcio = &ccb->mmcio;
ccb->ccb_h.status =
(mmcio->cmd.error == 0 ? CAM_REQ_CMP : CAM_REQ_CMP_ERR);
xpt_done(ccb);
}
}
#else
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
static void
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
sdhci_req_done(struct sdhci_slot *slot)
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
{
struct mmc_request *req;
if (slot->req != NULL && slot->curcmd != NULL) {
callout_stop(&slot->timeout_callout);
req = slot->req;
slot->req = NULL;
slot->curcmd = NULL;
req->done(req);
}
}
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#endif
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
static void
sdhci_req_wakeup(struct mmc_request *req)
{
struct sdhci_slot *slot;
slot = req->done_data;
req->flags |= MMC_REQ_DONE;
wakeup(req);
}
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
static void
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
sdhci_timeout(void *arg)
{
struct sdhci_slot *slot = arg;
if (slot->curcmd != NULL) {
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
slot_printf(slot, "Controller timeout\n");
When command and data interrupts have been aggregated together, don't do the data-completed processing if a command-error interrupt is also asserted. Reviewed by: Michal Meloun <meloun@miracle.cz>
2014-12-20 00:37:56 +00:00
sdhci_dumpregs(slot);
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
sdhci_reset(slot, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
slot->curcmd->error = MMC_ERR_TIMEOUT;
sdhci_req_done(slot);
When command and data interrupts have been aggregated together, don't do the data-completed processing if a command-error interrupt is also asserted. Reviewed by: Michal Meloun <meloun@miracle.cz>
2014-12-20 00:37:56 +00:00
} else {
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
slot_printf(slot, "Spurious timeout - no active command\n");
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
}
}
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
static void
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
sdhci_set_transfer_mode(struct sdhci_slot *slot, struct mmc_data *data)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
uint16_t mode;
if (data == NULL)
return;
mode = SDHCI_TRNS_BLK_CNT_EN;
if (data->len > 512)
mode |= SDHCI_TRNS_MULTI;
if (data->flags & MMC_DATA_READ)
mode |= SDHCI_TRNS_READ;
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#ifdef MMCCAM
struct ccb_mmcio *mmcio;
mmcio = &slot->ccb->mmcio;
if (mmcio->stop.opcode == MMC_STOP_TRANSMISSION
&& !(slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP))
mode |= SDHCI_TRNS_ACMD12;
#else
Add a new SDHCI quirk, SDHCI_QUIRK_BROKEN_AUTO_STOP, to workaround controllers that do not support or have broken ACMD12 implementations. Reviewed by: jmcneill Obtained from: NetBSD MFC after: 2 weeks Sponsored by: Rubicon Communications, LLC (Netgate) Differential Revision: https://reviews.freebsd.org/D10602
2017-05-09 19:01:57 +00:00
if (slot->req->stop && !(slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP))
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
mode |= SDHCI_TRNS_ACMD12;
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#endif
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
if (slot->flags & SDHCI_USE_DMA)
mode |= SDHCI_TRNS_DMA;
WR2(slot, SDHCI_TRANSFER_MODE, mode);
}
static void
sdhci_start_command(struct sdhci_slot *slot, struct mmc_command *cmd)
{
int flags, timeout;
Now that the PRESENT_STATE register is only used for the inhibit bits loop in this function, eliminate the state variable and restructure the loop to read the register just once at the top of the loop. Suggested by: skra
2017-01-08 18:28:06 +00:00
uint32_t mask;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->curcmd = cmd;
slot->cmd_done = 0;
cmd->error = MMC_ERR_NONE;
/* This flags combination is not supported by controller. */
if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
slot_printf(slot, "Unsupported response type!\n");
cmd->error = MMC_ERR_FAILED;
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
sdhci_req_done(slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
return;
}
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
/*
* Do not issue command if there is no card, clock or power.
* Controller will not detect timeout without clock active.
*/
Add a new sdhci interface method, get_card_present(). Many embedded SoC controllers that are (more or less) sdhci-compatible don't implement card detect, and the related values in the PRESENT_STATE register aren't useful. A bridge driver can now implement get_card_present() to read a gpio pin or whatever else is necessary for that system. The default implementation reads the CARD_PRESENT bit from the PRESENT_STATE register, so existing drivers will keep working (or keep not-fully-working, since many drivers right now can't detect card insert/remove).
2017-01-08 02:32:53 +00:00
if (!SDHCI_GET_CARD_PRESENT(slot->bus, slot) ||
Forget current bus power settings on full reset. Chip must be reconfigured. Do not issue command if there is no card, clock or power. Controller will not detect command timeout without clock active.
2008-12-06 01:31:07 +00:00
slot->power == 0 ||
slot->clock == 0) {
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
slot_printf(slot,
"Cannot issue a command (power=%d clock=%d)",
slot->power, slot->clock);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
cmd->error = MMC_ERR_FAILED;
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
sdhci_req_done(slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
return;
}
/* Always wait for free CMD bus. */
mask = SDHCI_CMD_INHIBIT;
/* Wait for free DAT if we have data or busy signal. */
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
if (cmd->data != NULL || (cmd->flags & MMC_RSP_BUSY))
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
mask |= SDHCI_DAT_INHIBIT;
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
/*
* We shouldn't wait for DAT for stop commands or CMD19/CMD21. Note
* that these latter are also special in that SDHCI_CMD_DATA should
* be set below but no actual data is ever read from the controller.
*/
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#ifdef MMCCAM
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (cmd == &slot->ccb->mmcio.stop ||
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#else
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (cmd == slot->req->stop ||
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#endif
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
__predict_false(cmd->opcode == MMC_SEND_TUNING_BLOCK ||
cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200))
mask &= ~SDHCI_DAT_INHIBIT;
Increase the wait time for acquiring the bus from 10 to 250ms. Normally it never needs to wait here at all; waiting is done at the end of the prior command. When doing a crash dump, the normal interrupt mechanism isn't used; instead the interrupt handler is called repeatedly in a polling-like manner. This can subvert hardware-specific drivers and lead to trying to start a new command while the previous command is still busy on the bus. Since the SD spec says the longest a card can take to execute any command is 250ms, use that as a timeout.
2014-02-15 17:59:32 +00:00
/*
* Wait for bus no more then 250 ms. Typically there will be no wait
* here at all, but when writing a crash dump we may be bypassing the
* host platform's interrupt handler, and in some cases that handler
* may be working around hardware quirks such as not respecting r1b
* busy indications. In those cases, this wait-loop serves the purpose
* of waiting for the prior command and data transfers to be done, and
* SD cards are allowed to take up to 250ms for write and erase ops.
* (It's usually more like 20-30ms in the real world.)
*/
timeout = 250;
Now that the PRESENT_STATE register is only used for the inhibit bits loop in this function, eliminate the state variable and restructure the loop to read the register just once at the top of the loop. Suggested by: skra
2017-01-08 18:28:06 +00:00
while (mask & RD4(slot, SDHCI_PRESENT_STATE)) {
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
if (timeout == 0) {
slot_printf(slot, "Controller never released "
"inhibit bit(s).\n");
sdhci_dumpregs(slot);
cmd->error = MMC_ERR_FAILED;
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
sdhci_req_done(slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
return;
}
timeout--;
DELAY(1000);
}
/* Prepare command flags. */
if (!(cmd->flags & MMC_RSP_PRESENT))
flags = SDHCI_CMD_RESP_NONE;
else if (cmd->flags & MMC_RSP_136)
flags = SDHCI_CMD_RESP_LONG;
else if (cmd->flags & MMC_RSP_BUSY)
flags = SDHCI_CMD_RESP_SHORT_BUSY;
else
flags = SDHCI_CMD_RESP_SHORT;
if (cmd->flags & MMC_RSP_CRC)
flags |= SDHCI_CMD_CRC;
if (cmd->flags & MMC_RSP_OPCODE)
flags |= SDHCI_CMD_INDEX;
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
if (cmd->data != NULL)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
flags |= SDHCI_CMD_DATA;
if (cmd->opcode == MMC_STOP_TRANSMISSION)
flags |= SDHCI_CMD_TYPE_ABORT;
/* Prepare data. */
sdhci_start_data(slot, cmd->data);
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
/*
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
* Interrupt aggregation: To reduce total number of interrupts
* group response interrupt with data interrupt when possible.
* If there going to be data interrupt, mask response one.
*/
if (slot->data_done == 0) {
WR4(slot, SDHCI_SIGNAL_ENABLE,
slot->intmask &= ~SDHCI_INT_RESPONSE);
}
/* Set command argument. */
WR4(slot, SDHCI_ARGUMENT, cmd->arg);
/* Set data transfer mode. */
sdhci_set_transfer_mode(slot, cmd->data);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 1))
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
slot_printf(slot, "Starting command!\n");
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* Start command. */
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
WR2(slot, SDHCI_COMMAND_FLAGS, (cmd->opcode << 8) | (flags & 0xff));
After a timeout, reset the controller using SDHCI_RESET_CMD|SDHCI_RESET_DATA rather than SDHCI_RESET_ALL; the latter turns off clocks and power, removing any possibility of recovering from the error. Also, double the timeout to 2 seconds. Despite what the SD spec says about all transactions completing in 250ms or less, I have a card which sometimes takes more than a second to complete a write.
2014-02-16 17:22:49 +00:00
/* Start timeout callout. */
Raise the SDHCI timeout to 10 seconds and add a sysctl to allow changing this value at runtime. The SD card specification says that a block write or a block erase can take up to 250ms to complete and thus, under some circumstances, the existent 2 seconds timeout was triggering with normal usage. This change fixes the sporadic controller timeout that happens on RPi and RPi 2. Discussed with: ian (some time ago)
2015-05-21 20:09:36 +00:00
callout_reset(&slot->timeout_callout, slot->timeout * hz,
sdhci_timeout, slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
static void
sdhci_finish_command(struct sdhci_slot *slot)
{
int i;
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
uint32_t val;
uint8_t extra;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 1))
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
slot_printf(slot, "%s: called, err %d flags %d\n",
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
__func__, slot->curcmd->error, slot->curcmd->flags);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->cmd_done = 1;
- Add support for eMMC "partitions". Besides the user data area, i. e. the default partition, eMMC v4.41 and later devices can additionally provide up to: 1 enhanced user data area partition 2 boot partitions 1 RPMB (Replay Protected Memory Block) partition 4 general purpose partitions (optionally with a enhanced or extended attribute) Of these "partitions", only the enhanced user data area one actually slices the user data area partition and, thus, gets handled with the help of geom_flashmap(4). The other types of partitions have address space independent from the default partition and need to be switched to via CMD6 (SWITCH), i. e. constitute a set of additional "disks". The second kind of these "partitions" doesn't fit that well into the design of mmc(4) and mmcsd(4). I've decided to let mmcsd(4) hook all of these "partitions" up as disk(9)'s (except for the RPMB partition as it didn't seem to make much sense to be able to put a file-system there and may require authentication; therefore, RPMB partitions are solely accessible via the newly added IOCTL interface currently; see also below). This approach for one resulted in cleaner code. Second, it retains the notion of mmcsd(4) children corresponding to a single physical device each. With the addition of some layering violations, it also would have been possible for mmc(4) to add separate mmcsd(4) instances with one disk each for all of these "partitions", however. Still, both mmc(4) and mmcsd(4) share some common code now e. g. for issuing CMD6, which has been factored out into mmc_subr.c. Besides simply subdividing eMMC devices, some Intel NUCs having UEFI code in the boot partitions etc., another use case for the partition support is the activation of pseudo-SLC mode, which manufacturers of eMMC chips typically associate with the enhanced user data area and/ or the enhanced attribute of general purpose partitions. CAVEAT EMPTOR: Partitioning eMMC devices is a one-time operation. - Now that properly issuing CMD6 is crucial (so data isn't written to the wrong partition for example), make a step into the direction of correctly handling the timeout for these commands in the MMC layer. Also, do a SEND_STATUS when CMD6 is invoked with an R1B response as recommended by relevant specifications. However, quite some work is left to be done in this regard; all other R1B-type commands done by the MMC layer also should be followed by a SEND_STATUS (CMD13), the erase timeout calculations/handling as documented in specifications are entirely ignored so far, the MMC layer doesn't provide timeouts applicable up to the bridge drivers and at least sdhci(4) currently is hardcoding 1 s as timeout for all command types unconditionally. Let alone already available return codes often not being checked in the MMC layer ... - Add an IOCTL interface to mmcsd(4); this is sufficiently compatible with Linux so that the GNU mmc-utils can be ported to and used with FreeBSD (note that due to the remaining deficiencies outlined above SANITIZE operations issued by/with `mmc` currently most likely will fail). These latter will be added to ports as sysutils/mmc-utils in a bit. Among others, the `mmc` tool of the GNU mmc-utils allows for partitioning eMMC devices (tested working). - For devices following the eMMC specification v4.41 or later, year 0 is 2013 rather than 1997; so correct this for assembling the device ID string properly. - Let mmcsd.ko depend on mmc.ko. Additionally, bump MMC_VERSION as at least for some of the above a matching pair is required. - In the ACPI front-end of sdhci(4) describe the Intel eMMC and SDXC controllers as such in order to match the PCI one. Additionally, in the entry for the 80860F14 SDXC controller remove the eMMC-only SDHCI_QUIRK_INTEL_POWER_UP_RESET. OKed by: imp Submitted by: ian (mmc_switch_status() implementation)
2017-03-16 22:23:04 +00:00
/*
* Interrupt aggregation: Restore command interrupt.
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
* Main restore point for the case when command interrupt
- Add support for eMMC "partitions". Besides the user data area, i. e. the default partition, eMMC v4.41 and later devices can additionally provide up to: 1 enhanced user data area partition 2 boot partitions 1 RPMB (Replay Protected Memory Block) partition 4 general purpose partitions (optionally with a enhanced or extended attribute) Of these "partitions", only the enhanced user data area one actually slices the user data area partition and, thus, gets handled with the help of geom_flashmap(4). The other types of partitions have address space independent from the default partition and need to be switched to via CMD6 (SWITCH), i. e. constitute a set of additional "disks". The second kind of these "partitions" doesn't fit that well into the design of mmc(4) and mmcsd(4). I've decided to let mmcsd(4) hook all of these "partitions" up as disk(9)'s (except for the RPMB partition as it didn't seem to make much sense to be able to put a file-system there and may require authentication; therefore, RPMB partitions are solely accessible via the newly added IOCTL interface currently; see also below). This approach for one resulted in cleaner code. Second, it retains the notion of mmcsd(4) children corresponding to a single physical device each. With the addition of some layering violations, it also would have been possible for mmc(4) to add separate mmcsd(4) instances with one disk each for all of these "partitions", however. Still, both mmc(4) and mmcsd(4) share some common code now e. g. for issuing CMD6, which has been factored out into mmc_subr.c. Besides simply subdividing eMMC devices, some Intel NUCs having UEFI code in the boot partitions etc., another use case for the partition support is the activation of pseudo-SLC mode, which manufacturers of eMMC chips typically associate with the enhanced user data area and/ or the enhanced attribute of general purpose partitions. CAVEAT EMPTOR: Partitioning eMMC devices is a one-time operation. - Now that properly issuing CMD6 is crucial (so data isn't written to the wrong partition for example), make a step into the direction of correctly handling the timeout for these commands in the MMC layer. Also, do a SEND_STATUS when CMD6 is invoked with an R1B response as recommended by relevant specifications. However, quite some work is left to be done in this regard; all other R1B-type commands done by the MMC layer also should be followed by a SEND_STATUS (CMD13), the erase timeout calculations/handling as documented in specifications are entirely ignored so far, the MMC layer doesn't provide timeouts applicable up to the bridge drivers and at least sdhci(4) currently is hardcoding 1 s as timeout for all command types unconditionally. Let alone already available return codes often not being checked in the MMC layer ... - Add an IOCTL interface to mmcsd(4); this is sufficiently compatible with Linux so that the GNU mmc-utils can be ported to and used with FreeBSD (note that due to the remaining deficiencies outlined above SANITIZE operations issued by/with `mmc` currently most likely will fail). These latter will be added to ports as sysutils/mmc-utils in a bit. Among others, the `mmc` tool of the GNU mmc-utils allows for partitioning eMMC devices (tested working). - For devices following the eMMC specification v4.41 or later, year 0 is 2013 rather than 1997; so correct this for assembling the device ID string properly. - Let mmcsd.ko depend on mmc.ko. Additionally, bump MMC_VERSION as at least for some of the above a matching pair is required. - In the ACPI front-end of sdhci(4) describe the Intel eMMC and SDXC controllers as such in order to match the PCI one. Additionally, in the entry for the 80860F14 SDXC controller remove the eMMC-only SDHCI_QUIRK_INTEL_POWER_UP_RESET. OKed by: imp Submitted by: ian (mmc_switch_status() implementation)
2017-03-16 22:23:04 +00:00
* happened first.
*/
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_true(slot->curcmd->opcode != MMC_SEND_TUNING_BLOCK &&
slot->curcmd->opcode != MMC_SEND_TUNING_BLOCK_HS200))
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask |=
SDHCI_INT_RESPONSE);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* In case of error - reset host and return. */
if (slot->curcmd->error) {
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (slot->curcmd->error == MMC_ERR_BADCRC)
slot->retune_req |= SDHCI_RETUNE_REQ_RESET;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
sdhci_reset(slot, SDHCI_RESET_CMD);
sdhci_reset(slot, SDHCI_RESET_DATA);
sdhci_start(slot);
return;
}
/* If command has response - fetch it. */
if (slot->curcmd->flags & MMC_RSP_PRESENT) {
if (slot->curcmd->flags & MMC_RSP_136) {
/* CRC is stripped so we need one byte shift. */
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
extra = 0;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
for (i = 0; i < 4; i++) {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
val = RD4(slot, SDHCI_RESPONSE + i * 4);
if (slot->quirks &
SDHCI_QUIRK_DONT_SHIFT_RESPONSE)
Add a new SDHCI_QUIRK_DONT_SHIFT_RESPONSE for hardware that pre-shifts the response bits the way we do in software. While the hardware is just doing the sensible thing rather than leaving it to the software, it's in violation of the spec by doing so. Grrrr.
2013-08-18 19:08:53 +00:00
slot->curcmd->resp[3 - i] = val;
else {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
slot->curcmd->resp[3 - i] =
Add a new SDHCI_QUIRK_DONT_SHIFT_RESPONSE for hardware that pre-shifts the response bits the way we do in software. While the hardware is just doing the sensible thing rather than leaving it to the software, it's in violation of the spec by doing so. Grrrr.
2013-08-18 19:08:53 +00:00
(val << 8) | extra;
extra = val >> 24;
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
} else
slot->curcmd->resp[0] = RD4(slot, SDHCI_RESPONSE);
}
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 1))
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
printf("Resp: %02x %02x %02x %02x\n",
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
slot->curcmd->resp[0], slot->curcmd->resp[1],
slot->curcmd->resp[2], slot->curcmd->resp[3]);
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* If data ready - finish. */
if (slot->data_done)
sdhci_start(slot);
}
static void
sdhci_start_data(struct sdhci_slot *slot, struct mmc_data *data)
{
uint32_t target_timeout, current_timeout;
uint8_t div;
if (data == NULL && (slot->curcmd->flags & MMC_RSP_BUSY) == 0) {
slot->data_done = 1;
return;
}
slot->data_done = 0;
/* Calculate and set data timeout.*/
/* XXX: We should have this from mmc layer, now assume 1 sec. */
When the timeout clock is based on the SD clock, the timeout counter has to be recalculated every time the SD clock frequency changes. Also, tidy up the counter calculation... it makes no sense to calculate a value one larger than the limit, then whine that it's too large and truncate it to the limit. If the BROKEN_TIMEOUT quirk is set, don't calculate the counter at all, just set it to the limit value.
2013-08-16 19:40:00 +00:00
if (slot->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL) {
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
div = 0xE;
When the timeout clock is based on the SD clock, the timeout counter has to be recalculated every time the SD clock frequency changes. Also, tidy up the counter calculation... it makes no sense to calculate a value one larger than the limit, then whine that it's too large and truncate it to the limit. If the BROKEN_TIMEOUT quirk is set, don't calculate the counter at all, just set it to the limit value.
2013-08-16 19:40:00 +00:00
} else {
target_timeout = 1000000;
div = 0;
current_timeout = (1 << 13) * 1000 / slot->timeout_clk;
while (current_timeout < target_timeout && div < 0xE) {
++div;
current_timeout <<= 1;
}
/* Compensate for an off-by-one error in the CaFe chip.*/
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
if (div < 0xE &&
When the timeout clock is based on the SD clock, the timeout counter has to be recalculated every time the SD clock frequency changes. Also, tidy up the counter calculation... it makes no sense to calculate a value one larger than the limit, then whine that it's too large and truncate it to the limit. If the BROKEN_TIMEOUT quirk is set, don't calculate the counter at all, just set it to the limit value.
2013-08-16 19:40:00 +00:00
(slot->quirks & SDHCI_QUIRK_INCR_TIMEOUT_CONTROL)) {
++div;
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
WR1(slot, SDHCI_TIMEOUT_CONTROL, div);
if (data == NULL)
return;
/* Use DMA if possible. */
if ((slot->opt & SDHCI_HAVE_DMA))
slot->flags |= SDHCI_USE_DMA;
/* If data is small, broken DMA may return zeroes instead of data, */
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
if ((slot->quirks & SDHCI_QUIRK_BROKEN_TIMINGS) &&
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
(data->len <= 512))
slot->flags &= ~SDHCI_USE_DMA;
/* Some controllers require even block sizes. */
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
if ((slot->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE) &&
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
((data->len) & 0x3))
slot->flags &= ~SDHCI_USE_DMA;
/* Load DMA buffer. */
if (slot->flags & SDHCI_USE_DMA) {
if (data->flags & MMC_DATA_READ)
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
bus_dmamap_sync(slot->dmatag, slot->dmamap,
Style changes and typos fixed.
2013-08-19 05:48:42 +00:00
BUS_DMASYNC_PREREAD);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
else {
memcpy(slot->dmamem, data->data,
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
(data->len < DMA_BLOCK_SIZE) ?
Style changes and typos fixed.
2013-08-19 05:48:42 +00:00
data->len : DMA_BLOCK_SIZE);
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
bus_dmamap_sync(slot->dmatag, slot->dmamap,
Style changes and typos fixed.
2013-08-19 05:48:42 +00:00
BUS_DMASYNC_PREWRITE);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
WR4(slot, SDHCI_DMA_ADDRESS, slot->paddr);
/* Interrupt aggregation: Mask border interrupt
* for the last page and unmask else. */
if (data->len == DMA_BLOCK_SIZE)
slot->intmask &= ~SDHCI_INT_DMA_END;
else
slot->intmask |= SDHCI_INT_DMA_END;
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
}
/* Current data offset for both PIO and DMA. */
slot->offset = 0;
/* Set block size and request IRQ on 4K border. */
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
WR2(slot, SDHCI_BLOCK_SIZE, SDHCI_MAKE_BLKSZ(DMA_BOUNDARY,
(data->len < 512) ? data->len : 512));
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* Set block count. */
WR2(slot, SDHCI_BLOCK_COUNT, (data->len + 511) / 512);
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 1))
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
slot_printf(slot, "Block size: %02x, count %lu\n",
(unsigned int)SDHCI_MAKE_BLKSZ(DMA_BOUNDARY, (data->len < 512) ? data->len : 512),
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
(unsigned long)(data->len + 511) / 512);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
Add hooks for plugging platform-provided transfer backend. In order to use platorm backend hardware driver should impement three methods: - platform_start_transfer and platform_finish_transfer to start and finish transfer - platform_will_handle - check whether transaction is suitable for backend. If not - driver will fall back to PIO mode. Submitted by: Daisuke Aoyama <aoyama at peach.ne.jp> Approved by: ian@
2013-02-28 19:43:14 +00:00
void
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
sdhci_finish_data(struct sdhci_slot *slot)
{
struct mmc_data *data = slot->curcmd->data;
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
size_t left;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* Interrupt aggregation: Restore command interrupt.
Style changes and typos fixed.
2013-08-19 05:48:42 +00:00
* Auxiliary restore point for the case when data interrupt
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
* happened first. */
if (!slot->cmd_done) {
WR4(slot, SDHCI_SIGNAL_ENABLE,
slot->intmask |= SDHCI_INT_RESPONSE);
}
/* Unload rest of data from DMA buffer. */
Add a new SDHCI quirk, SDHCI_QUIRK_BROKEN_AUTO_STOP, to workaround controllers that do not support or have broken ACMD12 implementations. Reviewed by: jmcneill Obtained from: NetBSD MFC after: 2 weeks Sponsored by: Rubicon Communications, LLC (Netgate) Differential Revision: https://reviews.freebsd.org/D10602
2017-05-09 19:01:57 +00:00
if (!slot->data_done && (slot->flags & SDHCI_USE_DMA) &&
slot->curcmd->data != NULL) {
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
if (data->flags & MMC_DATA_READ) {
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
left = data->len - slot->offset;
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
bus_dmamap_sync(slot->dmatag, slot->dmamap,
Style changes and typos fixed.
2013-08-19 05:48:42 +00:00
BUS_DMASYNC_POSTREAD);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
memcpy((u_char*)data->data + slot->offset, slot->dmamem,
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
(left < DMA_BLOCK_SIZE) ? left : DMA_BLOCK_SIZE);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
} else
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
bus_dmamap_sync(slot->dmatag, slot->dmamap,
Style changes and typos fixed.
2013-08-19 05:48:42 +00:00
BUS_DMASYNC_POSTWRITE);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
Handle the possibility that SDHCI_PLATFORM_START_TRANSFER() can fail, by moving the handling of curcmd->error != 0 to the end of the interrupt handler. Also make sdhci_finish_data() idempotent by moving the setting of slot->data_done = 1 down past the point where the busdma buffer is unmapped. This allows for the possibility that the finish routine can get called from multiple places when handling errors.
2015-01-11 21:25:03 +00:00
slot->data_done = 1;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* If there was error - reset the host. */
if (slot->curcmd->error) {
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (slot->curcmd->error == MMC_ERR_BADCRC)
slot->retune_req |= SDHCI_RETUNE_REQ_RESET;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
sdhci_reset(slot, SDHCI_RESET_CMD);
sdhci_reset(slot, SDHCI_RESET_DATA);
sdhci_start(slot);
return;
}
/* If we already have command response - finish. */
if (slot->cmd_done)
sdhci_start(slot);
}
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#ifdef MMCCAM
static void
sdhci_start(struct sdhci_slot *slot)
{
union ccb *ccb;
ccb = slot->ccb;
if (ccb == NULL)
return;
struct ccb_mmcio *mmcio;
mmcio = &ccb->mmcio;
if (!(slot->flags & CMD_STARTED)) {
slot->flags |= CMD_STARTED;
sdhci_start_command(slot, &mmcio->cmd);
return;
}
/*
* Old stack doesn't use this!
* Enabling this code causes significant performance degradation
* and IRQ storms on BBB, Wandboard behaves fine.
* Not using this code does no harm...
if (!(slot->flags & STOP_STARTED) && mmcio->stop.opcode != 0) {
slot->flags |= STOP_STARTED;
sdhci_start_command(slot, &mmcio->stop);
return;
}
*/
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 1))
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
slot_printf(slot, "result: %d\n", mmcio->cmd.error);
if (mmcio->cmd.error == 0 &&
(slot->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST)) {
sdhci_reset(slot, SDHCI_RESET_CMD);
sdhci_reset(slot, SDHCI_RESET_DATA);
}
sdhci_req_done(slot);
}
#else
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
static void
sdhci_start(struct sdhci_slot *slot)
{
struct mmc_request *req;
req = slot->req;
if (req == NULL)
return;
if (!(slot->flags & CMD_STARTED)) {
slot->flags |= CMD_STARTED;
sdhci_start_command(slot, req->cmd);
return;
}
Add a new SDHCI quirk, SDHCI_QUIRK_BROKEN_AUTO_STOP, to workaround controllers that do not support or have broken ACMD12 implementations. Reviewed by: jmcneill Obtained from: NetBSD MFC after: 2 weeks Sponsored by: Rubicon Communications, LLC (Netgate) Differential Revision: https://reviews.freebsd.org/D10602
2017-05-09 19:01:57 +00:00
if ((slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP) &&
!(slot->flags & STOP_STARTED) && req->stop) {
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->flags |= STOP_STARTED;
sdhci_start_command(slot, req->stop);
return;
}
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 1))
Add hw.sdhci.debug sysctl to control debug level.
2009-01-28 22:53:41 +00:00
slot_printf(slot, "result: %d\n", req->cmd->error);
if (!req->cmd->error &&
Add a new SDHCI quirk, SDHCI_QUIRK_BROKEN_AUTO_STOP, to workaround controllers that do not support or have broken ACMD12 implementations. Reviewed by: jmcneill Obtained from: NetBSD MFC after: 2 weeks Sponsored by: Rubicon Communications, LLC (Netgate) Differential Revision: https://reviews.freebsd.org/D10602
2017-05-09 19:01:57 +00:00
((slot->curcmd == req->stop &&
(slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP)) ||
(slot->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) {
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
sdhci_reset(slot, SDHCI_RESET_CMD);
sdhci_reset(slot, SDHCI_RESET_DATA);
}
Add timeout logic to sdhci, separate from the timeouts done by the hardware. If the hardware is not in a good state (like maybe clocks aren't running because of a configuration glitch) its timeout clock may also not work correctly, and the next command sent will hang that thread forever. The thread in question is usually the one and only thread (at init time) or a bio queue worker thread whose lockup will eventually lead to the whole system locking up when it runs out of buffers. No sd card command should take longer than 250ms. This new code establishes a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00
sdhci_req_done(slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
#endif
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
sdhci_generic_request(device_t brdev __unused, device_t reqdev,
struct mmc_request *req)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
SDHCI_LOCK(slot);
if (slot->req != NULL) {
SDHCI_UNLOCK(slot);
return (EBUSY);
}
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 1)) {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
slot_printf(slot,
"CMD%u arg %#x flags %#x dlen %u dflags %#x\n",
req->cmd->opcode, req->cmd->arg, req->cmd->flags,
(req->cmd->data)?(u_int)req->cmd->data->len:0,
Add hw.sdhci.debug sysctl to control debug level.
2009-01-28 22:53:41 +00:00
(req->cmd->data)?req->cmd->data->flags:0);
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->req = req;
slot->flags = 0;
sdhci_start(slot);
SDHCI_UNLOCK(slot);
Add support for interruptless kernel dumping.
2009-02-17 19:12:15 +00:00
if (dumping) {
while (slot->req != NULL) {
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
sdhci_generic_intr(slot);
Add support for interruptless kernel dumping.
2009-02-17 19:12:15 +00:00
DELAY(10);
}
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
return (0);
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
sdhci_generic_get_ro(device_t brdev __unused, device_t reqdev)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
uint32_t val;
SDHCI_LOCK(slot);
val = RD4(slot, SDHCI_PRESENT_STATE);
SDHCI_UNLOCK(slot);
return (!(val & SDHCI_WRITE_PROTECT));
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
sdhci_generic_acquire_host(device_t brdev __unused, device_t reqdev)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
int err = 0;
SDHCI_LOCK(slot);
while (slot->bus_busy)
Cleanup msleep() arguments. Move wakeup() out of the lock.
2008-12-06 21:52:32 +00:00
msleep(slot, &slot->mtx, 0, "sdhciah", 0);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->bus_busy++;
/* Activate led. */
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl |= SDHCI_CTRL_LED);
SDHCI_UNLOCK(slot);
return (err);
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
sdhci_generic_release_host(device_t brdev __unused, device_t reqdev)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
SDHCI_LOCK(slot);
/* Deactivate led. */
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl &= ~SDHCI_CTRL_LED);
slot->bus_busy--;
SDHCI_UNLOCK(slot);
Cleanup msleep() arguments. Move wakeup() out of the lock.
2008-12-06 21:52:32 +00:00
wakeup(slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
return (0);
}
static void
sdhci_cmd_irq(struct sdhci_slot *slot, uint32_t intmask)
{
if (!slot->curcmd) {
slot_printf(slot, "Got command interrupt 0x%08x, but "
"there is no active command.\n", intmask);
sdhci_dumpregs(slot);
return;
}
if (intmask & SDHCI_INT_TIMEOUT)
slot->curcmd->error = MMC_ERR_TIMEOUT;
else if (intmask & SDHCI_INT_CRC)
slot->curcmd->error = MMC_ERR_BADCRC;
else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
slot->curcmd->error = MMC_ERR_FIFO;
sdhci_finish_command(slot);
}
static void
sdhci_data_irq(struct sdhci_slot *slot, uint32_t intmask)
{
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
struct mmc_data *data;
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
size_t left;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
if (!slot->curcmd) {
slot_printf(slot, "Got data interrupt 0x%08x, but "
"there is no active command.\n", intmask);
sdhci_dumpregs(slot);
return;
}
if (slot->curcmd->data == NULL &&
(slot->curcmd->flags & MMC_RSP_BUSY) == 0) {
slot_printf(slot, "Got data interrupt 0x%08x, but "
"there is no active data operation.\n",
intmask);
sdhci_dumpregs(slot);
return;
}
if (intmask & SDHCI_INT_DATA_TIMEOUT)
slot->curcmd->error = MMC_ERR_TIMEOUT;
Remove accidentally committed debug panic(9) call
2013-02-17 01:34:25 +00:00
else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT))
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->curcmd->error = MMC_ERR_BADCRC;
if (slot->curcmd->data == NULL &&
(intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
SDHCI_INT_DMA_END))) {
slot_printf(slot, "Got data interrupt 0x%08x, but "
"there is busy-only command.\n", intmask);
sdhci_dumpregs(slot);
slot->curcmd->error = MMC_ERR_INVALID;
}
if (slot->curcmd->error) {
/* No need to continue after any error. */
Handle the possibility that SDHCI_PLATFORM_START_TRANSFER() can fail, by moving the handling of curcmd->error != 0 to the end of the interrupt handler. Also make sdhci_finish_data() idempotent by moving the setting of slot->data_done = 1 down past the point where the busdma buffer is unmapped. This allows for the possibility that the finish routine can get called from multiple places when handling errors.
2015-01-11 21:25:03 +00:00
goto done;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
/* Handle tuning completion interrupt. */
if (__predict_false((intmask & SDHCI_INT_DATA_AVAIL) &&
(slot->curcmd->opcode == MMC_SEND_TUNING_BLOCK ||
slot->curcmd->opcode == MMC_SEND_TUNING_BLOCK_HS200))) {
slot->req->flags |= MMC_TUNE_DONE;
sdhci_finish_command(slot);
sdhci_finish_data(slot);
return;
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* Handle PIO interrupt. */
Add hooks for plugging platform-provided transfer backend. In order to use platorm backend hardware driver should impement three methods: - platform_start_transfer and platform_finish_transfer to start and finish transfer - platform_will_handle - check whether transaction is suitable for backend. If not - driver will fall back to PIO mode. Submitted by: Daisuke Aoyama <aoyama at peach.ne.jp> Approved by: ian@
2013-02-28 19:43:14 +00:00
if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
if ((slot->opt & SDHCI_PLATFORM_TRANSFER) &&
Add hooks for plugging platform-provided transfer backend. In order to use platorm backend hardware driver should impement three methods: - platform_start_transfer and platform_finish_transfer to start and finish transfer - platform_will_handle - check whether transaction is suitable for backend. If not - driver will fall back to PIO mode. Submitted by: Daisuke Aoyama <aoyama at peach.ne.jp> Approved by: ian@
2013-02-28 19:43:14 +00:00
SDHCI_PLATFORM_WILL_HANDLE(slot->bus, slot)) {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
SDHCI_PLATFORM_START_TRANSFER(slot->bus, slot,
&intmask);
Add hooks for plugging platform-provided transfer backend. In order to use platorm backend hardware driver should impement three methods: - platform_start_transfer and platform_finish_transfer to start and finish transfer - platform_will_handle - check whether transaction is suitable for backend. If not - driver will fall back to PIO mode. Submitted by: Daisuke Aoyama <aoyama at peach.ne.jp> Approved by: ian@
2013-02-28 19:43:14 +00:00
slot->flags |= PLATFORM_DATA_STARTED;
} else
sdhci_transfer_pio(slot);
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
/* Handle DMA border. */
if (intmask & SDHCI_INT_DMA_END) {
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
data = slot->curcmd->data;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
Again, fixes regarding style(4), to comments, includes and unused parameters.
2017-03-17 22:57:37 +00:00
/* Unload DMA buffer ... */
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
left = data->len - slot->offset;
if (data->flags & MMC_DATA_READ) {
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_POSTREAD);
memcpy((u_char*)data->data + slot->offset, slot->dmamem,
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
(left < DMA_BLOCK_SIZE) ? left : DMA_BLOCK_SIZE);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
} else {
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_POSTWRITE);
}
/* ... and reload it again. */
slot->offset += DMA_BLOCK_SIZE;
left = data->len - slot->offset;
if (data->flags & MMC_DATA_READ) {
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_PREREAD);
} else {
memcpy(slot->dmamem, (u_char*)data->data + slot->offset,
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
(left < DMA_BLOCK_SIZE)? left : DMA_BLOCK_SIZE);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_PREWRITE);
}
/* Interrupt aggregation: Mask border interrupt
* for the last page. */
if (left == DMA_BLOCK_SIZE) {
slot->intmask &= ~SDHCI_INT_DMA_END;
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
}
/* Restart DMA. */
WR4(slot, SDHCI_DMA_ADDRESS, slot->paddr);
}
/* We have got all data. */
Add hooks for plugging platform-provided transfer backend. In order to use platorm backend hardware driver should impement three methods: - platform_start_transfer and platform_finish_transfer to start and finish transfer - platform_will_handle - check whether transaction is suitable for backend. If not - driver will fall back to PIO mode. Submitted by: Daisuke Aoyama <aoyama at peach.ne.jp> Approved by: ian@
2013-02-28 19:43:14 +00:00
if (intmask & SDHCI_INT_DATA_END) {
if (slot->flags & PLATFORM_DATA_STARTED) {
slot->flags &= ~PLATFORM_DATA_STARTED;
SDHCI_PLATFORM_FINISH_TRANSFER(slot->bus, slot);
} else
sdhci_finish_data(slot);
}
Handle the possibility that SDHCI_PLATFORM_START_TRANSFER() can fail, by moving the handling of curcmd->error != 0 to the end of the interrupt handler. Also make sdhci_finish_data() idempotent by moving the setting of slot->data_done = 1 down past the point where the busdma buffer is unmapped. This allows for the possibility that the finish routine can get called from multiple places when handling errors.
2015-01-11 21:25:03 +00:00
done:
if (slot->curcmd != NULL && slot->curcmd->error != 0) {
if (slot->flags & PLATFORM_DATA_STARTED) {
slot->flags &= ~PLATFORM_DATA_STARTED;
SDHCI_PLATFORM_FINISH_TRANSFER(slot->bus, slot);
} else
sdhci_finish_data(slot);
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
static void
sdhci_acmd_irq(struct sdhci_slot *slot)
{
uint16_t err;
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
err = RD4(slot, SDHCI_ACMD12_ERR);
if (!slot->curcmd) {
slot_printf(slot, "Got AutoCMD12 error 0x%04x, but "
"there is no active command.\n", err);
sdhci_dumpregs(slot);
return;
}
slot_printf(slot, "Got AutoCMD12 error 0x%04x\n", err);
sdhci_reset(slot, SDHCI_RESET_CMD);
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
void
sdhci_generic_intr(struct sdhci_slot *slot)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
Toggle card insert/remove interrupt enable bits on events Some controllers (namely Freescale's eSDHC, tested) will continue to assert the card removed or card insert interrupts even after being handled. To work around this, disable watching the interrupt that just occurred until the opposite interrupt is triggered. Linux has a similar change in its driver to address the same problem.
2016-11-02 00:54:39 +00:00
uint32_t intmask, present;
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
SDHCI_LOCK(slot);
/* Read slot interrupt status. */
intmask = RD4(slot, SDHCI_INT_STATUS);
if (intmask == 0 || intmask == 0xffffffff) {
SDHCI_UNLOCK(slot);
return;
}
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 2))
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
slot_printf(slot, "Interrupt %#x\n", intmask);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
/* Handle tuning error interrupt. */
if (__predict_false(intmask & SDHCI_INT_TUNEERR)) {
slot_printf(slot, "Tuning error indicated\n");
slot->retune_req |= SDHCI_RETUNE_REQ_RESET;
if (slot->curcmd) {
slot->curcmd->error = MMC_ERR_BADCRC;
sdhci_finish_command(slot);
}
}
/* Handle re-tuning interrupt. */
if (__predict_false(intmask & SDHCI_INT_RETUNE))
slot->retune_req |= SDHCI_RETUNE_REQ_NEEDED;
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
/* Handle card presence interrupts. */
if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Bridge drivers can set a new slot option, SDHCI_NON_REMOVABLE, to indicate non-removable media (such as eMMC). The sdhci driver will not enable insert/remove interrupts, and sdhci_generic_get_card_present() will always return true. Bridge drivers can set a new quirk, SDHCI_QUIRK_POLL_CARD_PRESENT, and the sdhci driver will not enable insert/remove interrupts, and instead will use a callout to poll the card-present status at 5 Hz. For bridge drivers that get notified of card insert/remove via gpio interrupts, there is a new sdhci_handle_card_present() function they can call from the gpio interrupt handler to inform the sdhci code of the event. In addition to adding these new features, the existing code to debounce card insertions was updated to use taskqueue_enqueue_timeout() instead of scheduling a callout to do the taskqueue_enqueue(). There is also now a comment explaining that insertion-debounce is what's going on -- it took me a long time to realize that's what the old sdhci_card_delay() routine was really doing. There is no functional difference between the old and new debounce code (I hope!).
2017-01-09 01:15:18 +00:00
present = (intmask & SDHCI_INT_CARD_INSERT) != 0;
Toggle card insert/remove interrupt enable bits on events Some controllers (namely Freescale's eSDHC, tested) will continue to assert the card removed or card insert interrupts even after being handled. To work around this, disable watching the interrupt that just occurred until the opposite interrupt is triggered. Linux has a similar change in its driver to address the same problem.
2016-11-02 00:54:39 +00:00
slot->intmask &=
~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
slot->intmask |= present ? SDHCI_INT_CARD_REMOVE :
SDHCI_INT_CARD_INSERT;
WR4(slot, SDHCI_INT_ENABLE, slot->intmask);
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
WR4(slot, SDHCI_INT_STATUS, intmask &
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE));
Add sdhci_handle_card_present_locked() that can be called from the interrupt handler which already holds the mutex, and have sdhci_handle_card_present() be just a tiny wrapper that does the locking for external callers. This should fix the recursive locking panics seen on rpi3. Reported by: Shawn Webb
2017-01-09 17:10:50 +00:00
sdhci_handle_card_present_locked(slot, present);
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
}
/* Handle command interrupts. */
if (intmask & SDHCI_INT_CMD_MASK) {
WR4(slot, SDHCI_INT_STATUS, intmask & SDHCI_INT_CMD_MASK);
sdhci_cmd_irq(slot, intmask & SDHCI_INT_CMD_MASK);
}
/* Handle data interrupts. */
if (intmask & SDHCI_INT_DATA_MASK) {
WR4(slot, SDHCI_INT_STATUS, intmask & SDHCI_INT_DATA_MASK);
Fix some more overly long lines, whitespace and other bugs according to style(9) as well as spelling in comments.
2017-02-04 19:35:38 +00:00
/* Don't call data_irq in case of errored command. */
When command and data interrupts have been aggregated together, don't do the data-completed processing if a command-error interrupt is also asserted. Reviewed by: Michal Meloun <meloun@miracle.cz>
2014-12-20 00:37:56 +00:00
if ((intmask & SDHCI_INT_CMD_ERROR_MASK) == 0)
sdhci_data_irq(slot, intmask & SDHCI_INT_DATA_MASK);
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
}
/* Handle AutoCMD12 error interrupt. */
if (intmask & SDHCI_INT_ACMD12ERR) {
WR4(slot, SDHCI_INT_STATUS, SDHCI_INT_ACMD12ERR);
sdhci_acmd_irq(slot);
}
/* Handle bus power interrupt. */
if (intmask & SDHCI_INT_BUS_POWER) {
WR4(slot, SDHCI_INT_STATUS, SDHCI_INT_BUS_POWER);
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
slot_printf(slot, "Card is consuming too much power!\n");
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
}
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
intmask &= ~(SDHCI_INT_ERROR | SDHCI_INT_TUNEERR | SDHCI_INT_RETUNE |
SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE | SDHCI_INT_CMD_MASK |
SDHCI_INT_DATA_MASK | SDHCI_INT_ACMD12ERR | SDHCI_INT_BUS_POWER);
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
/* The rest is unknown. */
if (intmask) {
WR4(slot, SDHCI_INT_STATUS, intmask);
slot_printf(slot, "Unexpected interrupt 0x%08x.\n",
intmask);
sdhci_dumpregs(slot);
}
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
SDHCI_UNLOCK(slot);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
sdhci_generic_read_ivar(device_t bus, device_t child, int which,
uintptr_t *result)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
struct sdhci_slot *slot = device_get_ivars(child);
switch (which) {
default:
return (EINVAL);
case MMCBR_IVAR_BUS_MODE:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.ios.bus_mode;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_BUS_WIDTH:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.ios.bus_width;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_CHIP_SELECT:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.ios.chip_select;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_CLOCK:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.ios.clock;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_F_MIN:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.f_min;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_F_MAX:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.f_max;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_HOST_OCR:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.host_ocr;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_MODE:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.mode;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_OCR:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.ocr;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_POWER_MODE:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.ios.power_mode;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_VDD:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.ios.vdd;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
case MMCBR_IVAR_RETUNE_REQ:
if (slot->opt & SDHCI_TUNING_ENABLED) {
if (slot->retune_req & SDHCI_RETUNE_REQ_RESET) {
*result = retune_req_reset;
break;
}
if (slot->retune_req & SDHCI_RETUNE_REQ_NEEDED) {
*result = retune_req_normal;
break;
}
}
*result = retune_req_none;
break;
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
case MMCBR_IVAR_VCCQ:
*result = slot->host.ios.vccq;
break;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
case MMCBR_IVAR_CAPS:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.caps;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
case MMCBR_IVAR_TIMING:
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = slot->host.ios.timing;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
break;
Allow card reader bridge driver to report maximum supported transfer size. sdhci supports up to 65535 blocks transfers, at91_mci - one block. Enable multiblock operations disabled before to follow at91_mci driver limitations. Reviewed by: imp@
2008-10-29 20:01:26 +00:00
case MMCBR_IVAR_MAX_DATA:
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
/*
* Re-tuning modes 1 and 2 restrict the maximum data length
* per read/write command to 4 MiB.
*/
if (slot->opt & SDHCI_TUNING_ENABLED &&
(slot->retune_mode == SDHCI_RETUNE_MODE_1 ||
slot->retune_mode == SDHCI_RETUNE_MODE_2)) {
*result = 4 * 1024 * 1024 / MMC_SECTOR_SIZE;
break;
}
Fix read_ivar implementation for MMC and SD. 1. Both mmc_read_ivar() and sdhci_read_ivar() use the expression '*(int *)result = val' to assign to result which is uintptr_t *. This does not work on big-endian 64 bit systems. 2. The media_size ivar is declared as 'off_t' which does not fit into uintptr_t in 32bit systems, change this to long. Submitted by: kanthms at netlogicmicro com (initial version)
2011-05-30 06:23:51 +00:00
*result = 65535;
Allow card reader bridge driver to report maximum supported transfer size. sdhci supports up to 65535 blocks transfers, at91_mci - one block. Enable multiblock operations disabled before to follow at91_mci driver limitations. Reviewed by: imp@
2008-10-29 20:01:26 +00:00
break;
- Add support for eMMC "partitions". Besides the user data area, i. e. the default partition, eMMC v4.41 and later devices can additionally provide up to: 1 enhanced user data area partition 2 boot partitions 1 RPMB (Replay Protected Memory Block) partition 4 general purpose partitions (optionally with a enhanced or extended attribute) Of these "partitions", only the enhanced user data area one actually slices the user data area partition and, thus, gets handled with the help of geom_flashmap(4). The other types of partitions have address space independent from the default partition and need to be switched to via CMD6 (SWITCH), i. e. constitute a set of additional "disks". The second kind of these "partitions" doesn't fit that well into the design of mmc(4) and mmcsd(4). I've decided to let mmcsd(4) hook all of these "partitions" up as disk(9)'s (except for the RPMB partition as it didn't seem to make much sense to be able to put a file-system there and may require authentication; therefore, RPMB partitions are solely accessible via the newly added IOCTL interface currently; see also below). This approach for one resulted in cleaner code. Second, it retains the notion of mmcsd(4) children corresponding to a single physical device each. With the addition of some layering violations, it also would have been possible for mmc(4) to add separate mmcsd(4) instances with one disk each for all of these "partitions", however. Still, both mmc(4) and mmcsd(4) share some common code now e. g. for issuing CMD6, which has been factored out into mmc_subr.c. Besides simply subdividing eMMC devices, some Intel NUCs having UEFI code in the boot partitions etc., another use case for the partition support is the activation of pseudo-SLC mode, which manufacturers of eMMC chips typically associate with the enhanced user data area and/ or the enhanced attribute of general purpose partitions. CAVEAT EMPTOR: Partitioning eMMC devices is a one-time operation. - Now that properly issuing CMD6 is crucial (so data isn't written to the wrong partition for example), make a step into the direction of correctly handling the timeout for these commands in the MMC layer. Also, do a SEND_STATUS when CMD6 is invoked with an R1B response as recommended by relevant specifications. However, quite some work is left to be done in this regard; all other R1B-type commands done by the MMC layer also should be followed by a SEND_STATUS (CMD13), the erase timeout calculations/handling as documented in specifications are entirely ignored so far, the MMC layer doesn't provide timeouts applicable up to the bridge drivers and at least sdhci(4) currently is hardcoding 1 s as timeout for all command types unconditionally. Let alone already available return codes often not being checked in the MMC layer ... - Add an IOCTL interface to mmcsd(4); this is sufficiently compatible with Linux so that the GNU mmc-utils can be ported to and used with FreeBSD (note that due to the remaining deficiencies outlined above SANITIZE operations issued by/with `mmc` currently most likely will fail). These latter will be added to ports as sysutils/mmc-utils in a bit. Among others, the `mmc` tool of the GNU mmc-utils allows for partitioning eMMC devices (tested working). - For devices following the eMMC specification v4.41 or later, year 0 is 2013 rather than 1997; so correct this for assembling the device ID string properly. - Let mmcsd.ko depend on mmc.ko. Additionally, bump MMC_VERSION as at least for some of the above a matching pair is required. - In the ACPI front-end of sdhci(4) describe the Intel eMMC and SDXC controllers as such in order to match the PCI one. Additionally, in the entry for the 80860F14 SDXC controller remove the eMMC-only SDHCI_QUIRK_INTEL_POWER_UP_RESET. OKed by: imp Submitted by: ian (mmc_switch_status() implementation)
2017-03-16 22:23:04 +00:00
case MMCBR_IVAR_MAX_BUSY_TIMEOUT:
/*
* Currently, sdhci_start_data() hardcodes 1 s for all CMDs.
*/
*result = 1000000;
break;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
return (0);
}
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
int
Fix overly long lines, whitespace and other bugs according to style(9).
2017-01-29 00:05:49 +00:00
sdhci_generic_write_ivar(device_t bus, device_t child, int which,
uintptr_t value)
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
{
struct sdhci_slot *slot = device_get_ivars(child);
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
uint32_t clock, max_clock;
int i;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
if (sdhci_debug > 1)
slot_printf(slot, "%s: var=%d\n", __func__, which);
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
switch (which) {
default:
return (EINVAL);
case MMCBR_IVAR_BUS_MODE:
slot->host.ios.bus_mode = value;
break;
case MMCBR_IVAR_BUS_WIDTH:
slot->host.ios.bus_width = value;
break;
case MMCBR_IVAR_CHIP_SELECT:
slot->host.ios.chip_select = value;
break;
case MMCBR_IVAR_CLOCK:
if (value > 0) {
Various timing-related fixes: - Replace divisor numbers with more descirptive names - Properly calculate minimum frequency for SDHCI 3.0 - Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock - Add min_freq method to sdhci_if.m and provide default implementation. By re-implementing this method hardware drivers can control frequency controller operates when executing initialization sequence
2013-02-16 23:12:06 +00:00
max_clock = slot->max_clk;
clock = max_clock;
if (slot->version < SDHCI_SPEC_300) {
for (i = 0; i < SDHCI_200_MAX_DIVIDER;
i <<= 1) {
if (clock <= value)
break;
clock >>= 1;
}
o Another round fixes for mmc(4), mmcsd(4) and sdhci(4) regarding comments, marking unused parameters as such, style(9), whitespace, etc. o In the mmc(4) bridges and sdhci(4) (bus) front-ends: - Remove redundant assignments of the default bus_generic_print_child device method (I've whipped these out of the tree as part of r227843 once, but they keep coming back ...), - use DEVMETHOD_END, - use NULL instead of 0 for pointers. o Trim/adjust includes.
2017-03-06 23:47:59 +00:00
} else {
Various timing-related fixes: - Replace divisor numbers with more descirptive names - Properly calculate minimum frequency for SDHCI 3.0 - Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock - Add min_freq method to sdhci_if.m and provide default implementation. By re-implementing this method hardware drivers can control frequency controller operates when executing initialization sequence
2013-02-16 23:12:06 +00:00
for (i = 0; i < SDHCI_300_MAX_DIVIDER;
i += 2) {
if (clock <= value)
break;
clock = max_clock / (i + 2);
}
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
}
Various timing-related fixes: - Replace divisor numbers with more descirptive names - Properly calculate minimum frequency for SDHCI 3.0 - Properly calculate frequency for SDHCI 3.0 in mmcbr_set_clock - Add min_freq method to sdhci_if.m and provide default implementation. By re-implementing this method hardware drivers can control frequency controller operates when executing initialization sequence
2013-02-16 23:12:06 +00:00
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
slot->host.ios.clock = clock;
} else
slot->host.ios.clock = 0;
break;
case MMCBR_IVAR_MODE:
slot->host.mode = value;
break;
case MMCBR_IVAR_OCR:
slot->host.ocr = value;
break;
case MMCBR_IVAR_POWER_MODE:
slot->host.ios.power_mode = value;
break;
case MMCBR_IVAR_VDD:
slot->host.ios.vdd = value;
break;
o Add support for eMMC DDR bus speed mode at 52 MHz to sdhci(4) and mmc(4). For the most part, this consists of support for: - Switching the signal voltage (VCCQ) to 1.8 V or (if supported by the host controller) to 1.2 V, - setting the UHS mode as appropriate in the SDHCI_HOST_CONTROL2 register, - setting the power class in the eMMC device according to the core supply voltage (VCC), - using different bits for enabling a bus width of 4 and 8 bits in the the eMMC device at DDR or higher timings respectively, - arbitrating timings faster than high speed if there actually are additional devices on the same MMC bus. Given that support for DDR52 is not denoted by SDHCI capability registers, availability of that timing is indicated by a new quirk SDHCI_QUIRK_MMC_DDR52 and only enabled for Intel SDHCI controllers so far. Generally, what it takes for a sdhci(4) front-end to enable support for DDR52 is to hook up the bridge method mmcbr_switch_vccq (which especially for 1.2 V signaling support is chip/board specific) and the sdhci_set_uhs_timing sdhci(4) method. As a side-effect, this change also fixes communication with some eMMC devices at SDR high speed mode with 52 MHz due to the signaling voltage and UHS bits in the SDHCI controller no longer being left in an inappropriate state. Compared to 52 MHz at SDR high speed which typically yields ~45 MB/s with the eMMC chips tested, throughput goes up to ~80 MB/s at DDR52. Additionally, this change already adds infrastructure and quite some code for modes up to HS400ES and SDR104 respectively (I did not want to add to much stuff at a time, though). Essentially, what is still missing in order to be able to activate support for these latter is is support for and handling of (re-)tuning. o In sdhci(4), add two tunables hw.sdhci.quirk_clear as well as hw.sdhci.quirk_set, which (when hooked up in the front-end) allow to set/clear sdhci(4) quirks for debugging and testing purposes. However, especially for SDHCI controllers on the PCI bus which have no specific support code so far and, thus, are picked up as generic SDHCI controllers, hw.sdhci.quirk_set allows for setting the necessary quirks (if required). o In mmc(4), check and handle the return values of some more function calls instead of assuming that everything went right. In case failures actually are not problematic, indicate that by casting the return value to void. Reviewed by: jmcneill
2017-03-19 23:27:17 +00:00
case MMCBR_IVAR_VCCQ:
slot->host.ios.vccq = value;
break;
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
case MMCBR_IVAR_TIMING:
slot->host.ios.timing = value;
break;
case MMCBR_IVAR_CAPS:
case MMCBR_IVAR_HOST_OCR:
case MMCBR_IVAR_F_MIN:
case MMCBR_IVAR_F_MAX:
Allow card reader bridge driver to report maximum supported transfer size. sdhci supports up to 65535 blocks transfers, at91_mci - one block. Enable multiblock operations disabled before to follow at91_mci driver limitations. Reviewed by: imp@
2008-10-29 20:01:26 +00:00
case MMCBR_IVAR_MAX_DATA:
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
case MMCBR_IVAR_RETUNE_REQ:
Import sdhci (PCI SD Host Controller) driver. Driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification. Update NOTES, enable module and static build. Enable related mmc and mmcsd modules build. Discussed on: mobile@, current@
2008-10-21 20:33:40 +00:00
return (EINVAL);
}
return (0);
}
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
#ifdef MMCCAM
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
void
Rename sdhci_cam_start_slot() into sdhci_start_slot() This change allows to just call sdhci_start_slot() in SDHCI drivers and not to think about which stack handles the operation. As a side effect, this will also fix MMCCAM with sdhci_acpi driver. Approved by: imp (mentor) Differential Revision: https://reviews.freebsd.org/D12471
2017-09-24 09:05:35 +00:00
sdhci_start_slot(struct sdhci_slot *slot)
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
{
if ((slot->devq = cam_simq_alloc(1)) == NULL) {
goto fail;
}
mtx_init(&slot->sim_mtx, "sdhcisim", NULL, MTX_DEF);
slot->sim = cam_sim_alloc(sdhci_cam_action, sdhci_cam_poll,
"sdhci_slot", slot, device_get_unit(slot->bus),
&slot->sim_mtx, 1, 1, slot->devq);
if (slot->sim == NULL) {
cam_simq_free(slot->devq);
slot_printf(slot, "cannot allocate CAM SIM\n");
goto fail;
}
mtx_lock(&slot->sim_mtx);
if (xpt_bus_register(slot->sim, slot->bus, 0) != 0) {
slot_printf(slot,
"cannot register SCSI pass-through bus\n");
cam_sim_free(slot->sim, FALSE);
cam_simq_free(slot->devq);
mtx_unlock(&slot->sim_mtx);
goto fail;
}
mtx_unlock(&slot->sim_mtx);
/* End CAM-specific init */
slot->card_present = 0;
sdhci_card_task(slot, 0);
return;
fail:
if (slot->sim != NULL) {
mtx_lock(&slot->sim_mtx);
xpt_bus_deregister(cam_sim_path(slot->sim));
cam_sim_free(slot->sim, FALSE);
mtx_unlock(&slot->sim_mtx);
}
if (slot->devq != NULL)
cam_simq_free(slot->devq);
}
static void
sdhci_cam_handle_mmcio(struct cam_sim *sim, union ccb *ccb)
{
struct sdhci_slot *slot;
slot = cam_sim_softc(sim);
sdhci_cam_request(slot, ccb);
}
void
sdhci_cam_action(struct cam_sim *sim, union ccb *ccb)
{
struct sdhci_slot *slot;
slot = cam_sim_softc(sim);
if (slot == NULL) {
ccb->ccb_h.status = CAM_SEL_TIMEOUT;
xpt_done(ccb);
return;
}
mtx_assert(&slot->sim_mtx, MA_OWNED);
switch (ccb->ccb_h.func_code) {
case XPT_PATH_INQ:
{
struct ccb_pathinq *cpi;
cpi = &ccb->cpi;
cpi->version_num = 1;
cpi->hba_inquiry = 0;
cpi->target_sprt = 0;
cpi->hba_misc = PIM_NOBUSRESET | PIM_SEQSCAN;
cpi->hba_eng_cnt = 0;
cpi->max_target = 0;
cpi->max_lun = 0;
cpi->initiator_id = 1;
cpi->maxio = MAXPHYS;
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "Deglitch Networks", HBA_IDLEN);
strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->bus_id = cam_sim_bus(sim);
cpi->base_transfer_speed = 100; /* XXX WTF? */
cpi->protocol = PROTO_MMCSD;
cpi->protocol_version = SCSI_REV_0;
cpi->transport = XPORT_MMCSD;
cpi->transport_version = 0;
cpi->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_GET_TRAN_SETTINGS:
{
struct ccb_trans_settings *cts = &ccb->cts;
if (sdhci_debug > 1)
slot_printf(slot, "Got XPT_GET_TRAN_SETTINGS\n");
cts->protocol = PROTO_MMCSD;
cts->protocol_version = 1;
cts->transport = XPORT_MMCSD;
cts->transport_version = 1;
cts->xport_specific.valid = 0;
cts->proto_specific.mmc.host_ocr = slot->host.host_ocr;
cts->proto_specific.mmc.host_f_min = slot->host.f_min;
cts->proto_specific.mmc.host_f_max = slot->host.f_max;
cts->proto_specific.mmc.host_caps = slot->host.caps;
memcpy(&cts->proto_specific.mmc.ios, &slot->host.ios, sizeof(struct mmc_ios));
ccb->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_SET_TRAN_SETTINGS:
{
if (sdhci_debug > 1)
slot_printf(slot, "Got XPT_SET_TRAN_SETTINGS\n");
sdhci_cam_settran_settings(slot, ccb);
ccb->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_RESET_BUS:
if (sdhci_debug > 1)
slot_printf(slot, "Got XPT_RESET_BUS, ACK it...\n");
ccb->ccb_h.status = CAM_REQ_CMP;
break;
case XPT_MMC_IO:
/*
* Here is the HW-dependent part of
* sending the command to the underlying h/w
* At some point in the future an interrupt comes.
* Then the request will be marked as completed.
*/
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 1))
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
slot_printf(slot, "Got XPT_MMC_IO\n");
ccb->ccb_h.status = CAM_REQ_INPROG;
sdhci_cam_handle_mmcio(sim, ccb);
return;
/* NOTREACHED */
break;
default:
ccb->ccb_h.status = CAM_REQ_INVALID;
break;
}
xpt_done(ccb);
return;
}
void
sdhci_cam_poll(struct cam_sim *sim)
{
return;
}
int sdhci_cam_get_possible_host_clock(struct sdhci_slot *slot, int proposed_clock) {
int max_clock, clock, i;
if (proposed_clock == 0)
return 0;
max_clock = slot->max_clk;
clock = max_clock;
if (slot->version < SDHCI_SPEC_300) {
for (i = 0; i < SDHCI_200_MAX_DIVIDER;
i <<= 1) {
if (clock <= proposed_clock)
break;
clock >>= 1;
}
} else {
for (i = 0; i < SDHCI_300_MAX_DIVIDER;
i += 2) {
if (clock <= proposed_clock)
break;
clock = max_clock / (i + 2);
}
}
return clock;
}
int
sdhci_cam_settran_settings(struct sdhci_slot *slot, union ccb *ccb)
{
struct mmc_ios *ios;
struct mmc_ios *new_ios;
struct ccb_trans_settings_mmc *cts;
ios = &slot->host.ios;
cts = &ccb->cts.proto_specific.mmc;
new_ios = &cts->ios;
/* Update only requested fields */
if (cts->ios_valid & MMC_CLK) {
ios->clock = sdhci_cam_get_possible_host_clock(slot, new_ios->clock);
slot_printf(slot, "Clock => %d\n", ios->clock);
}
if (cts->ios_valid & MMC_VDD) {
ios->vdd = new_ios->vdd;
slot_printf(slot, "VDD => %d\n", ios->vdd);
}
if (cts->ios_valid & MMC_CS) {
ios->chip_select = new_ios->chip_select;
slot_printf(slot, "CS => %d\n", ios->chip_select);
}
if (cts->ios_valid & MMC_BW) {
ios->bus_width = new_ios->bus_width;
slot_printf(slot, "Bus width => %d\n", ios->bus_width);
}
if (cts->ios_valid & MMC_PM) {
ios->power_mode = new_ios->power_mode;
slot_printf(slot, "Power mode => %d\n", ios->power_mode);
}
if (cts->ios_valid & MMC_BT) {
ios->timing = new_ios->timing;
slot_printf(slot, "Timing => %d\n", ios->timing);
}
if (cts->ios_valid & MMC_BM) {
ios->bus_mode = new_ios->bus_mode;
slot_printf(slot, "Bus mode => %d\n", ios->bus_mode);
}
/* XXX Provide a way to call a chip-specific IOS update, required for TI */
return (sdhci_cam_update_ios(slot));
}
int
sdhci_cam_update_ios(struct sdhci_slot *slot)
{
struct mmc_ios *ios = &slot->host.ios;
slot_printf(slot, "%s: power_mode=%d, clk=%d, bus_width=%d, timing=%d\n",
__func__, ios->power_mode, ios->clock, ios->bus_width, ios->timing);
SDHCI_LOCK(slot);
/* Do full reset on bus power down to clear from any state. */
if (ios->power_mode == power_off) {
WR4(slot, SDHCI_SIGNAL_ENABLE, 0);
sdhci_init(slot);
}
/* Configure the bus. */
sdhci_set_clock(slot, ios->clock);
sdhci_set_power(slot, (ios->power_mode == power_off) ? 0 : ios->vdd);
if (ios->bus_width == bus_width_8) {
slot->hostctrl |= SDHCI_CTRL_8BITBUS;
slot->hostctrl &= ~SDHCI_CTRL_4BITBUS;
} else if (ios->bus_width == bus_width_4) {
slot->hostctrl &= ~SDHCI_CTRL_8BITBUS;
slot->hostctrl |= SDHCI_CTRL_4BITBUS;
} else if (ios->bus_width == bus_width_1) {
slot->hostctrl &= ~SDHCI_CTRL_8BITBUS;
slot->hostctrl &= ~SDHCI_CTRL_4BITBUS;
} else {
panic("Invalid bus width: %d", ios->bus_width);
}
if (ios->timing == bus_timing_hs &&
!(slot->quirks & SDHCI_QUIRK_DONT_SET_HISPD_BIT))
slot->hostctrl |= SDHCI_CTRL_HISPD;
else
slot->hostctrl &= ~SDHCI_CTRL_HISPD;
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl);
/* Some controllers like reset after bus changes. */
if(slot->quirks & SDHCI_QUIRK_RESET_ON_IOS)
sdhci_reset(slot, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
SDHCI_UNLOCK(slot);
return (0);
}
int
sdhci_cam_request(struct sdhci_slot *slot, union ccb *ccb)
{
struct ccb_mmcio *mmcio;
mmcio = &ccb->mmcio;
SDHCI_LOCK(slot);
/* if (slot->req != NULL) {
SDHCI_UNLOCK(slot);
return (EBUSY);
}
*/
o Add support for eMMC HS200 and HS400 bus speed modes at 200 MHz to sdhci(4), mmc(4) and mmcsd(4). For the most part, this consists of: - Correcting and extending the infrastructure for negotiating and enabling post-DDR52 modes already added as part of r315598. In fact, HS400ES now should work as well but hasn't been activated due to lack of corresponding hardware. - Adding support executing standard SDHCI initial tuning as well as re-tuning as required for eMMC HS200/HS400 and the fast UHS-I SD card modes. Currently, corresponding methods are only hooked up to the ACPI and PCI front-ends of sdhci(4), though. Moreover, sdhci(4) won't offer any modes requiring (re-)tuning to the MMC/SD layer in order to not break operations with other sdhci(4) front- ends. Likewise, sdhci(4) now no longer offers modes requiring the set_uhs_timing method introduced in r315598 to be implemented/ hooked up (previously, this method was used with DDR52 only, which in turn is only available with Intel controllers so far, i. e. no such limitation was necessary before). Similarly for 1.2/1.8 V VCCQ support and the switch_vccq method. - Addition of locking to the IOCTL half of mmcsd(4) to prevent races with detachment and suspension, especially since it's required to immediately switch away from RPMB partitions again after an access to these (so re-tuning can take place anew, given that the current eMMC specification v5.1 doesn't allow tuning commands to be issued with a RPMB partition selected). Therefore, the existing part_mtx lock in the mmcsd(4) softc is additionally renamed to disk_mtx in order to denote that it only refers to the disk(9) half, likewise for corresponding macros. On the system where the addition of DDR52 support increased the read throughput to ~80 MB/s (from ~45 MB/s at high speed), HS200 yields ~154 MB/s and HS400 ~187 MB/s, i. e. performance now has more than quadrupled compared to pre-r315598. Also, with the advent of (re-)tuning support, most infrastructure necessary for SD card UHS-I modes up to SDR104 now is also in place. Note, though, that the standard SDHCI way of (re-)tuning is special in several ways, which also is why sending the actual tuning requests to the device is part of sdhci(4). SDHCI implementations not following the specification, MMC and non-SDHCI SD card controllers likely will use a generic implementation in the MMC/SD layer for executing tuning, which hasn't been written so far, though. However, in fact this isn't a feature-only change; there are boards based on Intel Bay Trail where DDR52 is problematic and the suggested workaround is to use HS200 mode instead. So far exact details are unknown, however, i. e. whether that's due to a defect in these SoCs or on the boards. Moreover, due to the above changes requiring to be aware of possible MMC siblings in the fast path of mmc(4), corresponding information now is cached in mmc_softc. As a side-effect, mmc_calculate_clock(), mmc_delete_cards(), mmc_discover_cards() and mmc_rescan_cards() now all are guaranteed to operate on the same set of devices as there no longer is any use of device_get_children(9), which can fail in low memory situations. Likewise, mmc_calculate_clock() now longer will trigger a panic due to the latter. o Fix a bug in the failure reporting of mmcsd_delete(); in case of an error when the starting block of a previously stored erase request is used (in order to be able to erase a full erase sector worth of data), the starting block of the newly supplied bio_pblkno has to be returned for indicating no progress. Otherwise, upper layers might be told that a negative number of BIOs have been completed, leading to a panic. o Fix 2 bugs on resume: - Things done in fork1(9) like the acquisition of an SX lock or the sleepable memory allocation are incompatible with a MTX_DEF taken. Thus, mmcsd_resume() must not call kproc_create(9), which in turn uses fork1(9), with the disk_mtx (formerly part_mtx) held. - In mmc_suspend(), the bus is powered down, which in the typical case of a device being selected at the time of suspension, causes the device deselection as part of the bus acquisition by mmc(4) in mmc_scan() to fail as the bus isn't powered up again before later in mmc_go_discovery(). Thus, power down with the bus acquired in mmc_suspend(), which will trigger the deselection up-front. o Fix a memory leak in mmcsd_ioctl() in case copyin(9) fails. [1] o Fix missing variable initialization in mmc_switch_status(). [2] o Fix R1_SWITCH_ERROR detection in mmc_switch_status(). [3] o Handle the case of device_add_child(9) failing, for example due to a memory shortage, gracefully in mmc(4) and sdhci(4), including not leaking memory for the instance variables in case of mmc(4) (which might or might not fix [4] as the latter problem has been discovered independently). o Handle the case of an unknown SD CSD version in mmc_decode_csd_sd() gracefully instead of calling panic(9). o Again, check and handle the return values of some additional function calls in mmc(4) instead of assuming that everything went right or mark non-fatal errors by casting the return value to void. o Correct a typo in the Linux IOCTL compatibility; it should have been MMC_IOC_MULTI_CMD rather than MMC_IOC_CMD_MULTI. o Now that we are reaching ever faster speeds (more improvement in this regard is to be expected when adding ADMA support to sdhci(4)), apply a few micro-optimizations like predicting mmc(4) and sdhci(4) debugging to be off or caching erase sector and maximum data sizes as well support of block addressing in mmsd(4) (instead of doing 2 indirections on every read/write request for determining the maximum data size for example). Reported by: Coverity CID: 1372612 [1], 1372624 [2], 1372594 [3], 1007069 [4]
2017-07-23 16:11:47 +00:00
if (__predict_false(sdhci_debug > 1)) {
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
slot_printf(slot, "CMD%u arg %#x flags %#x dlen %u dflags %#x\n",
mmcio->cmd.opcode, mmcio->cmd.arg, mmcio->cmd.flags,
mmcio->cmd.data != NULL ? (unsigned int) mmcio->cmd.data->len : 0,
mmcio->cmd.data != NULL ? mmcio->cmd.data->flags: 0);
}
if (mmcio->cmd.data != NULL) {
if (mmcio->cmd.data->len == 0 || mmcio->cmd.data->flags == 0)
panic("data->len = %d, data->flags = %d -- something is b0rked",
(int)mmcio->cmd.data->len, mmcio->cmd.data->flags);
}
slot->ccb = ccb;
slot->flags = 0;
sdhci_start(slot);
SDHCI_UNLOCK(slot);
if (dumping) {
while (slot->ccb != NULL) {
sdhci_generic_intr(slot);
DELAY(10);
}
}
return (0);
}
Better contain MMCCAM parts of this file Remove some useless to the general user debugs Put debugs under sdhci_debug. Fix some style(9) regressions Submitted by: marius@
2017-07-10 03:38:17 +00:00
#endif /* MMCCAM */
An MMC/SD/SDIO stack using CAM Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's flexible queueing will make it easier to write non-storage drivers than the legacy stack. SDIO drivers from both the kernel and as userland daemons are possible, though much of that functionality will come later. Some of the CAM integration isn't complete (there are sleeps in the device probe state machine, for example), but those minor issues can be improved in-tree more easily than out of tree and shouldn't gate progress on other fronts. Appologies to reviews if specific items have been overlooked. Submitted by: Ilya Bakulin Reviewed by: emaste, imp, mav, adrian, ian Differential Review: https://reviews.freebsd.org/D4761 merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00
Split sdhci driver in two parts: sdhci and sdhci_pci. sdchi encapsulates a generic SD Host Controller logic that relies on actual hardware driver for register access. sdhci_pci implements driver for PCI SDHC controllers using new SDHCI interface No kernel config modifications are required, but if you load sdhc as a module you must switch to sdhci_pci instead.
2012-10-16 01:10:43 +00:00
MODULE_VERSION(sdhci, 1);
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