Commit Graph

41 Commits

Author SHA1 Message Date
Jim Harris
854c31980e isci: check return value of pci_alloc_msix()
Certain VM guest types (VMware, Xen) do not support MSI, so pci_alloc_msix()
always fails.  isci(4) was not properly detecting the allocation failure,
and would try to proceed with MSIx resource initialization rather than
reverting to INTx.

Reported and tested by: Bradley W. Dutton (brad-fbsd-stable@duttonbros.com)
MFC after:	3 days
Sponsored by:	Intel
2015-09-08 16:05:18 +00:00
Jim Harris
c16120409b isci: explicitly enable/disable PCI busmaster
BIOS always enables PCI busmaster on the isci device, which effectively
worked around this omission.  But when passing the isci device through
to a guest VM, the hypervisor will disable busmaster and isci will not
work without calling pci_enable_busmaster().

MFC after:	3 days
Sponsored by:	Intel
2015-09-08 15:59:55 +00:00
Jung-uk Kim
fd90e2ed54 CALLOUT_MPSAFE has lost its meaning since r141428, i.e., for more than ten
years for head.  However, it is continuously misused as the mpsafe argument
for callout_init(9).  Deprecate the flag and clean up callout_init() calls
to make them more consistent.

Differential Revision:	https://reviews.freebsd.org/D2613
Reviewed by:	jhb
MFC after:	2 weeks
2015-05-22 17:05:21 +00:00
Scott Long
23059fc77f Fix tunable and sysctl handling of the fail_on_task_timeout knob.
Reviewed by:	emax
Obtained from:	Netflix, Inc.
MFC after:	3 days
2014-12-24 07:04:04 +00:00
Steven Hartland
85c9dd9d89 Prevent overflow issues in timeout processing
Previously, any timeout value for which (timeout * hz) will overflow the
signed integer, will give weird results, since callout(9) routines will
convert negative values of ticks to '1'. For unsigned integer overflow we
will get sufficiently smaller timeout values than expected.

Switch from callout_reset, which requires conversion to int based ticks
to callout_reset_sbt to avoid this.

Also correct isci to correctly resolve ccb timeout.

This was based on the original work done by Eygene Ryabinkin
<rea@freebsd.org> back in 5 Aug 2011 which used a macro to help avoid
the overlow.

Differential Revision:	https://reviews.freebsd.org/D1157
Reviewed by:	mav, davide
MFC after:	1 month
Sponsored by:	Multiplay
2014-11-21 21:01:24 +00:00
Scott Long
3da2a91a57 In rare cases, a SATA drive can stop responding to commands and trigger a
reset device task request from the driver.  If the drive fails to respond
with a signature FIS, the driver would previously get into an endless retry
loop, stalling all I/O to the drive and keeping user processes stranded.
Instead, fail the i/o and invalidate the device if the task management
command times out.  This is controllable with the sysctl and tunable
hw.isci.fail_on_task_timeout
dev.isci.0.fail_on_task_timeout

The default for these is 1.

Reviewed by:	jimharris
Obtained from:	Netflix, Inc.
MFC after:	2 days
2014-06-30 01:01:54 +00:00
Scott Long
58cf99d20d Fix a case in ndling ATA_PASSTHROUGH commands that have an unaligned buffer.
This impacts some home-rolled SMART tools.

Reviewed by:	jimharris
Obtained from:	Netflix
MFC after:	2 days
2014-06-30 00:41:46 +00:00
Jim Harris
5d16b89793 Base the max number of SG elements on MAXPHYS.
Sponsored by:	Intel
Discussed with:	scottl, emax
MFC after:	3 days
2014-03-17 22:32:54 +00:00
Jim Harris
5c300060a8 isci: Ensure ATA passthrough commands with RETURN_RESPONSE bit set
translate their response.

Sponsored by:	Intel
Discussed with:	scottl
MFC after:	3 days
2014-03-17 22:30:54 +00:00
Jim Harris
cce45f0b07 Improve logging around some of the isci(4) reset and recovery paths.
Sponsored by:	Intel
Discussed with:	scottl
Approved by:	re (marius)
MFC after:	1 week
2013-10-09 19:37:41 +00:00
Konstantin Belousov
50fbc8e7e8 Make isci(4) loadable.
Reviewed by:	jimharris
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Approved by:	re (gjb)
2013-10-07 20:48:24 +00:00
Jim Harris
666b0fab76 For ATA_PASSTHROUGH commands, pretend isci(4) supports multiword DMA
by treating it as UDMA.

This fixes a problem introduced in r249933/r249939, where CAM sends
ATA_DSM_TRIM to SATA devices using ATA_PASSTHROUGH_16.  scsi_ata_trim()
sets protocol as DMA (not UDMA) which is for multi-word DMA, even
though no such mode is selected for the device.  isci(4) would fail
these commands which is the correct behavior but not consistent with
other HBAs, namely LSI's.

smh@ did some further testing on an LSI controller, which rejected
ATA_PASSTHROUGH_16 commands with mode=UDMA_OUT, even though only
a UDMA mode was selected on the device.  So this precludes adding
any kind of mode detection in CAM to determine which mode to use on
a per-device basis.

Sponsored by:	Intel
Discussed with:	scottl, smh
Reported by:	scottl
Tested by:	scottl
MFC after:	3 days
2013-06-26 22:08:45 +00:00
Eitan Adler
7a2b450ff8 Fxi a bunch of typos.
PR:	misc/174625
Submitted by:	Jeremy Chadwick <jdc@koitsu.org>
2013-05-10 16:41:26 +00:00
Gabor Kovesdan
b78540b1c7 - Correct mispellings of word resource
Submitted by:	Christoph Mallon <christoph.mallon@gmx.de>
2013-04-17 11:47:32 +00:00
Alexander Motin
e5dfa058da MFprojects/camlock r248982:
Stop abusing xpt_periph in random plases that really have no periph related
to CCB, for example, bus scanning.  NULL value is fine in such cases and it
is correctly logged in debug messages as "noperiph".  If at some point we
need some real XPT periphs (alike to pmpX now), quite likely they will be
per-bus, and not a single global instance as xpt_periph now.
2013-04-14 09:55:48 +00:00
Jim Harris
944497f65f Panic should the SCI framework ever request a pointer into the ccb's
data buffer for a ccb that is unmapped.

This case is currently not possible, since the SCI framework only
requests these pointers for doing SCSI/ATA translation of non-
READ/WRITE commands.  The panic is more to protect against the
unlikely future scenario where additional commands could be unmapped.

Sponsored by:	Intel
2013-03-27 00:15:22 +00:00
Jim Harris
1da66a2776 Report support for unmapped I/O by adding PIM_UNMAPPED flag.
Submitted by:	jhb, scottl
2013-03-26 23:04:06 +00:00
Konstantin Belousov
dd0b4fb6d5 Reform the busdma API so that new types may be added without modifying
every architecture's busdma_machdep.c.  It is done by unifying the
bus_dmamap_load_buffer() routines so that they may be called from MI
code.  The MD busdma is then given a chance to do any final processing
in the complete() callback.

The cam changes unify the bus_dmamap_load* handling in cam drivers.

The arm and mips implementations are updated to track virtual
addresses for sync().  Previously this was done in a type specific
way.  Now it is done in a generic way by recording the list of
virtuals in the map.

Submitted by:	jeff (sponsored by EMC/Isilon)
Reviewed by:	kan (previous version), scottl,
	mjacob (isp(4), no objections for target mode changes)
Discussed with:	     ian (arm changes)
Tested by:	marius (sparc64), mips (jmallet), isci(4) on x86 (jharris),
	amd64 (Fabian Keil <freebsd-listen@fabiankeil.de>)
2013-02-12 16:57:20 +00:00
Jim Harris
dfbc6dc2fa Don't call bus_dmamap_load in CAM_DIR_NONE case, since there is nothing
to map, and technically this isn't allowed.

Functionally, it works OK (at least on x86) to call bus_dmamap_load with
a NULL data pointer and zero length, so this is primarily for correctness
and consistency with other drivers.

While here, remove check in isci_io_request_construct for nseg==0.
Previously, bus_dmamap_load would pass nseg==1, even for case where
buffer is NULL and length = 0, which allowed CAM_DIR_NONE CCBs
to get processed.  This check is not correct though, and needed to be
removed both for the changes elsewhere in this patch, as well as jeff's
preliminary bus_dmamap_load_ccb patch (which uncovered all of this in
the first place).

MFC after:	3 days
2012-12-05 20:21:33 +00:00
Jim Harris
500cbe13db Add support for locate LED.
While here, change ISCI_LED to ISCI_PHY since conceptually the hardware
ties the LEDs to a phy and the LEDs for a given phy cannot be controlled
independently.

Submitted by: Paul Maulberger <Paul.Maulberger at gmx.de> (with modifications)
2012-10-10 18:01:56 +00:00
Jim Harris
37274fc04c Create led(4) device nodes mapped to isci(4) SGPIO locate LEDs.
Device nodes are in the format /dev/led/isci.busX.portY.locate.

Sponsored by:	Intel
Requested by:	Paul Maulberger <paul dot maulberger at gmx dot de>
MFC after:	1 week
2012-09-26 16:46:44 +00:00
Kevin Lo
26f370d011 Fix typo: s/protocl/protocol 2012-09-20 10:07:31 +00:00
Eitan Adler
0af1b47258 s/ is is / is /g
s/ a a / a /g

Approved by:	cperciva
MFC after:	3 days
2012-09-14 22:00:03 +00:00
Eitan Adler
582212fa04 s/teh/the/g
Approved by:	cperciva
MFC after:	3 days
2012-09-14 21:59:55 +00:00
Eitan Adler
96240c89f0 Correct double "the the"
Approved by:	cperciva
MFC after:	3 days
2012-09-14 21:28:56 +00:00
Jim Harris
cc31866200 isci(4): Fix SCSI/ATA translation for SCSI_WRITE_BUFFER w/ mode==0x7
(download microcode with offsets, save, and activate).

SATI translation layer was incorrectly using allocation length instead
of blocks, and was constructing the ATA command incorrectly.

Also change #define to specify that the 512 block size here is
specific for DOWNLOAD_MICROCODE, and does not relate to the device's
logical block size.

Submitted by: scottl (with small modifications)
MFC after: 3 days
2012-09-14 20:05:38 +00:00
Jim Harris
a099c5cca0 Do not call sati_check_data_io() for SATI_UNMAP sequences.
This routine is intended only for commands such as INQUIRY where
the controller may fill out a smaller amount of data than allocated
by the host.

The end result of this bug was that isci(4) would report non-zero
resid for successful SCSI_UNMAP commands.

Sponsored by:	Intel
MFC after:	3 days
2012-08-30 00:43:14 +00:00
Jim Harris
c588600407 Clear freeze bit before calling xpt_release_devq.
This ensures that any ccbs which immediately start during the call to
xpt_release_devq see an accurate picture of the frozen_lun_mask.

Sponsored by:	Intel
MFC after:	3 days
2012-08-24 22:04:16 +00:00
Jim Harris
3e0a9f1ff2 Fix/add support for SCSI UNMAP to ATA DSM translation.
This addresses kernel panic observed when sending SCSI UNMAP
commands to SATA disks attached to isci(4).

1) Flesh out callback routines to allocate/free buffers needed for
   translating SCSI UNMAP data to ATA DSM data.
2) Add controller-level pool for storing buffers previously allocated
   for UNMAP translation, to lessen chance of no buffer available
   under memory pressure.
3) Ensure driver properly handles case where buffer pool is empty
   and contigmalloc returns NULL.

Sponsored by: Intel
Reported by: Maksim Yevmenkin <max at netflix dot com>
Discussed with:  scottl
MFC after: 3 days
2012-08-21 22:28:14 +00:00
Jim Harris
dd92530581 Wait until completion context unwinds before retrying CCBs that have been
queued internally.  This works around issue in the isci HAL where it cannot
accept new I/O to a device after a resetting->ready state transition until
the completion context has unwound.

This issue was found by submitting non-tagged CCBs through pass(4) interface
to a SATA disk with an extremely small timeout value (5ms).  This would trigger
internal resets with I/O in the isci(4) internal queues.

The small timeout value had not been intentional (and original reporter has
since changed his test to use 5sec instead), but it did uncover this corner
case that would result in a hung disk.

Sponsored by: Intel
Reported and tested by: Ravi Pokala <rpokala at panasas dot com>
Reviewed by: scottl (earlier version)
MFC after: 1 week
2012-05-21 22:54:33 +00:00
Jim Harris
e0e3e85dc0 Fix off-by-one error in sati_inquiry_block_device_translate_data(). Bug would
result in INQUIRY VPD 0x81 to SATA devices to return only 63 bytes of data
instead of 64 during SCSI/ATA translation.

Sponsored by: Intel
Approved by: scottl
MFC after: 1 week
2012-05-04 23:45:34 +00:00
Jim Harris
cb77f0da67 Queue CCBs internally instead of using CAM_REQUEUE_REQ status. This fixes
problem where userspace apps such as smartctl fail due to CAM_REQUEUE_REQ
status getting returned when tagged commands are outstanding when smartctl
sends its I/O using the pass(4) interface.

Sponsored by: Intel
Found and tested by: Ravi Pokala <rpokala at panasas dot com>
Reviewed by: scottl
Approved by: scottl
MFC after: 1 week
2012-04-10 16:33:19 +00:00
Dimitry Andric
1040a0007e Fix the following compilation warning with clang trunk in isci(4):
sys/dev/isci/isci_task_request.c:198:7: error: case value not in enumerated type 'SCI_TASK_STATUS' (aka 'enum _SCI_TASK_STATUS') [-Werror,-Wswitch]
    case SCI_FAILURE_TIMEOUT:
           ^

This is because the switch is done on a SCI_TASK_STATUS enum type, but
the SCI_FAILURE_TIMEOUT value belongs to SCI_STATUS instead.

Because the list of SCI_TASK_STATUS values cannot be modified at this
time, use the simplest way to get rid of this warning, which is to cast
the switch argument to int.  No functional change.

Reviewed by:	jimharris
MFC after:	3 days
2012-03-30 22:52:08 +00:00
Jim Harris
8e0f1d18c8 Fix bug where isci(4) would report only 15 bytes of returned data on a
READ_CAP_16 command to a SATA target.

Sponsored by: Intel
Reviewed by: sbruno
Approved by: sbruno
MFC after: 3 days
2012-03-29 15:43:07 +00:00
Jim Harris
47c3b89324 Ensure consistent target IDs for direct-attached devices.
Sponsored by: Intel
Reported by: sbruno, <rpokala at panasas dot com>
Tested by: <rpokala at panasas dot com>
Reviewed by: scottl
Approved by: scottl
MFC after: 3 days
2012-03-28 18:38:13 +00:00
Jim Harris
7ccd203639 Call xpt_bus_register during attach context, then freeze and do not release
until domain discovery is complete.  This fixes an isci(4) bug on FreeBSD 7.x
where devices weren't always appearing after boot without an explicit rescan.

Sponsored by: Intel
Reported and tested by: <rpokala at panasas dot com>
Reviewed by: scottl
Approved by: scottl
2012-03-23 16:28:11 +00:00
Sean Bruno
b4b494e126 Update PCI-IDs with devices found on Intel SDP
Return  BUS_PROBE_DEFAULT so that non-default drivers may be loaded

Reviewed by:	jharris@
Obtained from:	Yahoo! Inc. and Intel
MFC after:	3 days
2012-02-27 17:04:18 +00:00
Sean Bruno
da6793f807 During work to port isci(4) to stable/7 I noted that the maxio portion of
struct ccb_pathinq from sys/cam/cam_ccb.h wasn't added to stable/7 at all
and didn't appear in stable/8 until svn R195534.  Since __FreeBSD_version
did not get bumped until svn R195634, assume that maxio is valid at 800102
or higher.

Obtained from:	Yahoo! Inc.
MFC after: 0 days
2012-02-17 06:47:16 +00:00
Jim Harris
0f2a8452df Remove explicit CC assignment in isci(4) Makefile to allow for building
with clang.  Also fix a number of warnings uncovered when building with
clang around some implicit enum conversions.

Sponsored by: Intel
Approved by: scottl
2012-02-09 17:50:24 +00:00
Jim Harris
2d57bb86ed Fix Coverity defects in isci(4) driver.
Sponsored by: Intel
Approved by: scottl
2012-02-07 17:45:11 +00:00
Jim Harris
f11c7f6305 Add isci(4) driver for amd64 and i386 targets.
The isci driver is for the integrated SAS controller in the Intel C600
(Patsburg) chipset.  Source files in sys/dev/isci directory are
FreeBSD-specific, and sys/dev/isci/scil subdirectory contains
an OS-agnostic library (SCIL) published by Intel to control the SAS
controller.  This library is used primarily as-is in this driver, with
some post-processing to better integrate into the kernel build
environment.

isci.4 and a README in the sys/dev/isci directory contain a few
additional details.

This driver is only built for amd64 and i386 targets.

Sponsored by: Intel
Reviewed by: scottl
Approved by: scottl
2012-01-31 19:38:18 +00:00