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freebsd-dev/sys/dev/usb
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Rafal Jaworowski 5713ef0ced Eliminate BUS_DMA <-> cache incoherencies in USB transfers. 
With write-allocate cache we get into the following scenario:

1. data has been updated in the memory by the USB HC, but
2. D-cache holds an un-flushed value of it
3. when affected cache line is being replaced, the old (un-flushed) value is
flushed and overwrites the newly arrived

This is possible due to how write-allocate works with virtual caches (ARM for
example).

In case of USB transfers it leads to fatal tags discrepancies in umass(4)
operation, which look like the following:

umass0: Invalid CSW: tag 1 should be 2
(probe0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(probe0:umass-sim0:0:0:0): Retrying Command
umass0: Invalid CSW: tag 1 should be 3
(probe0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(probe0:umass-sim0:0:0:0): Retrying Command
umass0: Invalid CSW: tag 1 should be 4
(probe0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(probe0:umass-sim0:0:0:0): Retrying Command
umass0: Invalid CSW: tag 1 should be 5
(probe0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(probe0:umass-sim0:0:0:0): Retrying Command
umass0: Invalid CSW: tag 1 should be 6
(probe0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(probe0:umass-sim0:0:0:0): error 5
(probe0:umass-sim0:0:0:0): Retries Exausted

To eliminate this, a BUS_DMASYNC_PREREAD sync operation is required in
usbd_start_transfer().

Credits for nailing this down go to Grzegorz Bernacki gjb AT semihalf DOT com.

Reviewed by:	imp
Approved by:	cognet (mentor)
2008-02-12 11:03:29 +00:00
..
dsbr100io.h Don't pretend to support !BSD systems. 2007-06-12 19:01:32 +00:00
ehci_pci.c Add PCI device support for Intel S7000FC4UR in usb and ichwd, systems 2007-11-15 23:59:36 +00:00
ehci.c - Revert last ehci.c change 2008-02-10 15:50:21 +00:00
ehcireg.h ehcivar.h: 2005-09-18 11:45:39 +00:00
ehcivar.h Expand callout compatibility macros in the main usb bridges. 2007-06-14 16:23:31 +00:00
FILES Acknowledge (dearly) departed files 2006-11-21 22:29:06 +00:00
hid.c s/logprintf/printf/g 2007-06-20 05:11:37 +00:00
hid.h
if_aue.c Remove duplicate ID and recall that I comes after E in alphabetical 2007-06-23 05:59:53 +00:00
if_auereg.h Remove my "custom" locks that allow for lock acquire abort, they are 2007-01-08 23:24:21 +00:00
if_axe.c Add private tx/rx buffer management to support large frame sizes 2007-11-10 16:23:38 +00:00
if_axereg.h Add private tx/rx buffer management to support large frame sizes 2007-11-10 16:23:38 +00:00
if_cdce.c Fix two more PRs: 2007-06-30 20:18:44 +00:00
if_cdcereg.h Prefer device_printf over printf 2007-06-10 07:33:48 +00:00
if_cue.c Note the Belkin F5U111 Adapter is covered by NETMATE entry. 2007-06-23 06:29:19 +00:00
if_cuereg.h Prefer device_printf to printf where sane. 2007-06-11 05:42:47 +00:00
if_kue.c Add a boatload of devices from OpenBSD and NetBSD to kue and cdce. 2007-06-23 06:47:43 +00:00
if_kuereg.h Prefer device_printf to printf 2007-06-11 05:50:47 +00:00
if_rue.c When all the other drivers were converted to scheduling a taskqueue to 2007-07-09 16:58:07 +00:00
if_ruereg.h Missed in last commit: add usb task for rue to use for its ticks. 2007-07-09 20:56:39 +00:00
if_rum.c Add the SparkLAN RT2573, found in HP s3200n 2008-01-07 09:14:37 +00:00
if_rumreg.h Update 802.11 wireless support: 2007-06-11 03:36:55 +00:00
if_rumvar.h Update 802.11 wireless support: 2007-06-11 03:36:55 +00:00
if_udav.c Cleanup lockmgr interface and exported KPI: 2008-01-24 12:34:30 +00:00
if_udavreg.h More removing compatibility macros. 2006-09-07 00:06:42 +00:00
if_ural.c Check wep flag in *_tx_mgt since we need to encrypt some management frame 2007-11-06 07:30:12 +00:00
if_uralreg.h Update 802.11 wireless support: 2007-06-11 03:36:55 +00:00
if_uralvar.h Update 802.11 wireless support: 2007-06-11 03:36:55 +00:00
if_zyd.c Fix incorrect dependencies of zyd(4). 2008-01-07 11:31:55 +00:00
if_zydfw.h upgrade zd1211b firmware for the zyd driver. This solves a hardware 2007-11-03 19:24:51 +00:00
if_zydreg.h - Remove magic number and fit max rx buffer size accurately. 2007-11-08 08:25:58 +00:00
kue_fw.h s/Static/static/g 2006-09-06 23:44:25 +00:00
ohci_pci.c Latest round of usb cleanups: 2007-06-21 14:42:34 +00:00
ohci.c s/logprintf/printf/g 2007-06-20 05:11:37 +00:00
ohcireg.h Use the limited scatter-gather capabilities of ehci, ohci and uhci 2006-05-28 05:27:09 +00:00
ohcivar.h Expand callout compatibility macros in the main usb bridges. 2007-06-14 16:23:31 +00:00
rio500_usb.h Don't pretend to support !BSD systems. 2007-06-12 19:01:32 +00:00
rt2573_ucode.h Add support for Ralink Technology RT2501USB/RT2601USB devices. 2007-05-06 10:07:21 +00:00
sl811hs.c Include usb_port.h to fix build. 2007-06-19 10:28:08 +00:00
sl811hsreg.h
sl811hsvar.h Use pause() rather than using tsleep() on a dummy variable. 2007-02-27 17:19:33 +00:00
slhci_pccard.c Include usb_port.h to fix build. 2007-06-19 10:28:08 +00:00
uark.c Allow arbitrary baud rates, not just the standard ones. 2008-01-26 04:30:48 +00:00
ubsa.c add support for Option GlobeTrotter 3G+ 2007-06-22 05:56:05 +00:00
ubser.c Prefer device_printf to printf("%s: ...", device_get_nameunit()). On 2007-07-05 06:42:14 +00:00
ubser.h
uchcom.c Add Winchiphead (or Nanjin QinHeng Electronics) USB Serial converter driver. 2007-10-18 10:51:06 +00:00
ucom.c Starting in version 1.56, ucomstop started calling ucomstart to work 2007-06-25 06:40:20 +00:00
ucomvar.h Eliminate usb_thread_t. 2007-06-12 17:30:54 +00:00
ucycom.c Latest round of usb cleanups: 2007-06-21 14:42:34 +00:00
udbp.c Prefer device_printf to printf + device_get_nameunit. This saves 2007-07-05 15:25:32 +00:00
udbp.h
ufm.c Latest round of usb cleanups: 2007-06-21 14:42:34 +00:00
ufoma.c Minor Bug fix that will cause panic with some terminal with voice path on USB. 2007-07-27 12:00:29 +00:00
uftdi.c Calculate baud rate divisor instead of allowing only a fixed set of 2008-01-25 02:41:44 +00:00
uftdireg.h Calculate baud rate divisor instead of allowing only a fixed set of 2008-01-25 02:41:44 +00:00
ugen.c The timeout is in milliseconds, not in hz. Only the portion of the 2007-06-28 06:22:40 +00:00
ugraphire_rdesc.h Add support for the Wacom Graphire 3 4x5. Like the Graphire 3, it has a 2005-12-31 04:38:50 +00:00
uhci_pci.c Add PCI device support for Intel S7000FC4UR in usb and ichwd, systems 2007-11-15 23:59:36 +00:00
uhci.c Expand callout compatibility macros in the main usb bridges. 2007-06-14 16:23:31 +00:00
uhcireg.h
uhcivar.h Expand callout compatibility macros in the main usb bridges. 2007-06-14 16:23:31 +00:00
uhid.c Latest round of usb cleanups: 2007-06-21 14:42:34 +00:00
uhub.c Fix two more PRs: 2007-06-30 20:18:44 +00:00
uipaq.c Add one of HTC Smartphone/PocketPC device IDs. 2007-10-22 08:28:24 +00:00
ukbd.c Remove explicit calls to keyboard methods with their respective variants 2007-12-29 21:55:25 +00:00
ulpt.c Latest round of usb cleanups: 2007-06-21 14:42:34 +00:00
umass.c Add quirks for Netac Onlydisk 2000 USB disk. 2007-12-11 06:41:38 +00:00
umct.c Finish removal of usb_port.h macros. 2007-06-18 22:27:57 +00:00
umodem.c Add missing newline in printf. 2007-07-29 18:16:43 +00:00
ums.c Sync with rev 1.63 of NetBSD's ums.c: 2007-12-26 14:31:16 +00:00
uplcom.c - Add quirk for the TrendNet TU-S9 adapter, which uses new version of PL2303 2007-12-16 12:39:50 +00:00
urio.c Latest round of usb cleanups: 2007-06-21 14:42:34 +00:00
usb_ethersubr.c Add the following functions to abstract away the creation of task threads 2007-01-08 23:21:06 +00:00
usb_ethersubr.h Add the following functions to abstract away the creation of task threads 2007-01-08 23:21:06 +00:00
usb_if.m
usb_mem.c s/logprintf/printf/g 2007-06-20 05:11:37 +00:00
usb_mem.h Remove more __OtherBSD__ ifdefs that don't make sense, and haven't for 2007-06-13 05:45:48 +00:00
usb_port.h Rename the kthread_xxx (e.g. kthread_create()) calls 2007-10-20 23:23:23 +00:00
usb_quirks.c Update quirks for the MetaGeek Wi-Spy 1A, 1B and 2.4x. 2007-11-11 20:57:08 +00:00
usb_quirks.h Add support for various MS Wirless usb mice. the patch is from 2007-06-29 21:07:41 +00:00
usb_subr.c Fix two more PRs: 2007-06-30 20:18:44 +00:00
usb.c Rename the kthread_xxx (e.g. kthread_create()) calls 2007-10-20 23:23:23 +00:00
usb.h Add definition for UIPROTO_MOUSE. 2007-06-30 02:40:21 +00:00
usbcdc.h
usbdevs Add the SparkLAN RT2573, found in HP s3200n 2008-01-07 09:14:37 +00:00
usbdi_util.c s/logprintf/printf/g 2007-06-20 05:11:37 +00:00
usbdi_util.h protect against multiple inclusion (this is useful when you 2007-01-03 10:50:03 +00:00
usbdi.c Eliminate BUS_DMA <-> cache incoherencies in USB transfers. 2008-02-12 11:03:29 +00:00
usbdi.h Fix two more PRs: 2007-06-30 20:18:44 +00:00
usbdivar.h Expand callout compatibility macros in the main usb bridges. 2007-06-14 16:23:31 +00:00
usbhid.h
uscanner.c Add entries for Epson multifunction scanner/printer/card readers, 2007-10-05 07:26:39 +00:00
uvisor.c Prefer device_printf to printf("%s:...", device_get_nameunit(),...); 2007-07-05 06:28:46 +00:00
uvscom.c Prefer device_printf to printf("%s:...", device_get_nameunit(),...); 2007-07-05 06:28:46 +00:00
uxb360gp_rdesc.h Add support for the Wacom Graphire 3 4x5. Like the Graphire 3, it has a 2005-12-31 04:38:50 +00:00