Commit Graph

32 Commits

Author SHA1 Message Date
Kenneth D. Merry
ecef54656d Set the max_lun field of the path inquiry CCB to 8.
This allows LUNs greater than 0 to be probed.  It can be increased later if
need be.

This brings back SVN rev 224973, which was inadvertently removed with the
import of the LSI driver.

Reported by:	dwhite
MFC after:	3 days
2012-02-14 22:27:43 +00:00
Kenneth D. Merry
bab893586b Return BUS_PROBE_DEFAULT instead of BUS_PROBE_VENDOR from the mps driver
probe routine.

This will allow LSI to ship drivers that return BUS_PROBE_VENDOR to
override the in-tree version of the driver.

MFC after:	3 days
2012-02-11 00:28:30 +00:00
Kenneth D. Merry
653c521f8d Bring in a number of mps(4) driver fixes from LSI:
1.  Fixed timeout specification for the msleep in mps_wait_command().
    Added 30 second timeout for mps_wait_command() calls in mps_user.c.

2.  Make sure we call mps_detach_user() from the kldunload path.

3.  Raid Hotplug behavior change.

    The driver now removes a volume when it goes to a failed state,
    so we also need to add volume back to the OS when it goes to
    opitimal/degraded/online from failed/missing.

    Handle raid volume add and remove from the IR_Volume event.
4.  Added some more debugging information.

5.  Replace xpt_async(AC_LOST_DEVICE, path, NULL) with
    mpssas_rescan_target().

    This is to work around a panic in CAM that shows up when adding a
    drive with a rescan and removing another device from the driver thread
    with an AC_LOST_DEVICE async notification.

    This problem was encountered in testing with the LSI sas2ircu utility,
    which was used to create a RAID volume from physical disks.  The driver
    has to create the RAID volume target and remove the physical disk
    targets, and triggered a panic in the process.

    The CAM issue needs to be fully diagnosed and fixed, but this works
    around the issue for now.

6.  Fix some memory initialization issues in mps_free_command().

7.  Resolve the "devq freeze forever" issue.  This was caused by the
    internal read capacity command issued in the non-head version of the
    driver.  When the command completed with an error, the driver wasn't
    unfreezing thd device queue.

    The version in head uses the CAM infrastructure for getting the read
    capacity information, and therefore doesn't have the same issue.

8.  Bump the version to 13.00.00.00-fbsd. (this is very close to LSI's
    internal stable driver 13.00.00.00)

Submitted by:	Kashyap Desai <Kashyap.Desai@lsi.com>
MFC after:	3 days
2012-02-09 00:16:12 +00:00
Kenneth D. Merry
d043c56453 Bring in the LSI-supported version of the mps(4) driver.
This involves significant changes to the mps(4) driver, but is not a
complete rewrite.

Some of the changes in this version of the driver:
 - Integrated RAID (IR) support.
 - Support for WarpDrive controllers.
 - Support for SCSI protection information (EEDP).
 - Support for TLR (Transport Level Retries), needed for tape drives.
 - Improved error recovery code.
 - ioctl interface compatible with LSI utilities.

mps.4:		Update the mps(4) driver man page somewhat for the driver
		changes.  The list of supported hardware still needs to be
		updated to reflect the full list of supported cards.

conf/files:	Add the new driver files.

mps/mpi/*:	Updated version of the MPI header files, with a BSD style
		copyright.

mps/*:		See above for a description of the new driver features.

modules/mps/Makefile:
		Add the new mps(4) driver files.

Submitted by:	Kashyap Desai <Kashyap.Desai@lsi.com>
Reviewed by:	ken
MFC after:	1 week
2012-01-26 18:17:21 +00:00
Alexander Motin
a0b435f856 Set maximum I/O size for mps(4) to MAXPHYS. Looking into the code, I see
no reason why it should be limited to 64K of DFLTPHYS. DMA data tag is any
way set to allow MAXPHYS, S/G lists (chain elements) are sufficient and
overflows are also handled. On my tests even 1MB I/Os are working fine.

Reviewed by:	ken@
2011-12-28 22:49:28 +00:00
Marius Strobl
4b7ec27007 - There's no need to overwrite the default device method with the default
one. Interestingly, these are actually the default for quite some time
  (bus_generic_driver_added(9) since r52045 and bus_generic_print_child(9)
  since r52045) but even recently added device drivers do this unnecessarily.
  Discussed with: jhb, marcel
- While at it, use DEVMETHOD_END.
  Discussed with: jhb
- Also while at it, use __FBSDID.
2011-11-22 21:28:20 +00:00
Ed Schouten
d745c852be Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.
This means that their use is restricted to a single C file.
2011-11-07 06:44:47 +00:00
Marius Strobl
50e66535b9 Sync with ahc(4)/ahd(4)/sym(4) etc:
Zero any sense not transferred by the device as the SCSI specification
mandates that any untransferred data should be assumed to be zero.

Reviewed by:	ken
2011-10-07 21:23:42 +00:00
Kenneth D. Merry
1cc052e80f Add descriptor sense support to CAM, and honor sense residuals properly in
CAM.

Desriptor sense is a new sense data format that originated in SPC-3.  Among
other things, it allows for an 8-byte info field, which is necessary to
pass back block numbers larger than 4 bytes.

This change adds a number of new functions to scsi_all.c (and therefore
libcam) that abstract out most access to sense data.

This includes a bump of CAM_VERSION, because the CCB ABI has changed.
Userland programs that use the CAM pass(4) driver will need to be
recompiled.

camcontrol.c:	Change uses of scsi_extract_sense() to use
		scsi_extract_sense_len().

		Use scsi_get_sks() instead of accessing sense key specific
		data directly.

scsi_modes:	Update the control mode page to the latest version (SPC-4).

scsi_cmds.c,
scsi_target.c:	Change references to struct scsi_sense_data to struct
		scsi_sense_data_fixed.  This should be changed to allow the
		user to specify fixed or descriptor sense, and then use
		scsi_set_sense_data() to build the sense data.

ps3cdrom.c:	Use scsi_set_sense_data() instead of setting sense data
		manually.

cam_periph.c:	Use scsi_extract_sense_len() instead of using
		scsi_extract_sense() or accessing sense data directly.

cam_ccb.h:	Bump the CAM_VERSION from 0x15 to 0x16.  The change of
		struct scsi_sense_data from 32 to 252 bytes changes the
		size of struct ccb_scsiio, but not the size of union ccb.
		So the version must be bumped to prevent structure
		mis-matches.

scsi_all.h:	Lots of updated SCSI sense data and other structures.

		Add function prototypes for the new sense data functions.

		Take out the inline implementation of scsi_extract_sense().
		It is now too large to put in a header file.

		Add macros to calculate whether fields are present and
		filled in fixed and descriptor sense data

scsi_all.c:	In scsi_op_desc(), allow the user to pass in NULL inquiry
		data, and we'll assume a direct access device in that case.

		Changed the SCSI RESERVED sense key name and description
		to COMPLETED, as it is now defined in the spec.

		Change the error recovery action for a number of read errors
		to prevent lots of retries when the drive has said that the
		block isn't accessible.  This speeds up reconstruction of
		the block by any RAID software running on top of the drive
		(e.g. ZFS).

		In scsi_sense_desc(), allow for invalid sense key numbers.
		This allows calling this routine without checking the input
		values first.

		Change scsi_error_action() to use scsi_extract_sense_len(),
		and handle things when invalid asc/ascq values are
		encountered.

		Add a new routine, scsi_desc_iterate(), that will call the
		supplied function for every descriptor in descriptor format
		sense data.

		Add scsi_set_sense_data(), and scsi_set_sense_data_va(),
		which build descriptor and fixed format sense data.  They
		currently default to fixed format sense data.

		Add a number of scsi_get_*() functions, which get different
		types of sense data fields from either fixed or descriptor
		format sense data, if the data is present.

		Add a number of scsi_*_sbuf() functions, which print
		formatted versions of various sense data fields.  These
		functions work for either fixed or descriptor sense.

		Add a number of scsi_sense_*_sbuf() functions, which have a
		standard calling interface and print the indicated field.
		These functions take descriptors only.

		Add scsi_sense_desc_sbuf(), which will print a formatted
		version of the given sense descriptor.

		Pull out a majority of the scsi_sense_sbuf() function and
		put it into scsi_sense_only_sbuf().  This allows callers
		that don't use struct ccb_scsiio to easily utilize the
		printing routines.  Revamp that function to handle
		descriptor sense and use the new sense fetching and
		printing routines.

		Move scsi_extract_sense() into scsi_all.c, and implement it
		in terms of the new function, scsi_extract_sense_len().
		The _len() version takes a length (which should be the
		sense length - residual) and can indicate which fields are
		present and valid in the sense data.

		Add a couple of new scsi_get_*() routines to get the sense
		key, asc, and ascq only.

mly.c:		Rename struct scsi_sense_data to struct
		scsi_sense_data_fixed.

sbp_targ.c:	Use the new sense fetching routines to get sense data
		instead of accessing it directly.

sbp.c:		Change the firewire/SCSI sense data transformation code to
		use struct scsi_sense_data_fixed instead of struct
		scsi_sense_data.  This should be changed later to use
		scsi_set_sense_data().

ciss.c:		Calculate the sense residual properly.  Use
		scsi_get_sense_key() to fetch the sense key.

mps_sas.c,
mpt_cam.c:	Set the sense residual properly.

iir.c:		Use scsi_set_sense_data() instead of building sense data by
		hand.

iscsi_subr.c:	Use scsi_extract_sense_len() instead of grabbing sense data
		directly.

umass.c:	Use scsi_set_sense_data() to build sense data.

		Grab the sense key using scsi_get_sense_key().

		Calculate the sense residual properly.

isp_freebsd.h:	Use scsi_get_*() routines to grab asc, ascq, and sense key
		values.

		Calculate and set the sense residual.

MFC after:	3 days
Sponsored by:	Spectra Logic Corporation
2011-10-03 20:32:55 +00:00
Kenneth D. Merry
5f06dfb792 Set the max_lun field in the path inquiry CCB for the mps(4) driver to 8.
This allows LUNs greater than 0 to be probed.  The value can be increased
later if need be.

Approved by:	re (kib)
2011-08-18 16:07:41 +00:00
Kenneth D. Merry
750ffe843d Silence 'out of chain frames' warnings and bump the number of frames.
mps.c:		Hide the 'out of chain frames' warning behind MPS_INFO.

mps_sas.c:	Hide the SIM queue freeze/unfreeze messages behind MPS_INFO.

mpsvar.h:	Bump the number of chain frames from 1024 to 2048.  From
		testing, it looks like this makes it less likely that we'll
		run out of chain frames, and it doesn't cost much memory
		(32K).

MFC after:	3 days
2011-02-25 17:30:25 +00:00
Kenneth D. Merry
550e2acdfc Fix several issues with the mps(4) driver.
When the driver ran out of DMA chaining buffers, it kept the timeout for
the I/O, and I/O would stall.

The driver was not freezing the device queue on errors.

mps.c:		Pull command completion logic into a separate
		function, and call the callback/wakeup for commands
		that are never sent due to lack of chain buffers.

		Add a number of extra diagnostic sysctl variables.

		Handle pre-hardware errors for configuration I/O.
		This doesn't panic the system, but it will fail the
		configuration I/O and there is no retry mechanism.
		So the device probe will not succeed.  This should
		be a very uncommon situation, however.

mps_sas.c:	Freeze the SIM queue when we run out of chain
		buffers, and unfreeze it when more commands
		complete.

		Freeze the device queue when errors occur, so that
		CAM can insure proper command ordering.

		Report pre-hardware errors for task management
		commands.  In general, that shouldn't be possible
		because task management commands don't have S/G
		lists, and that is currently the only error path
		before we get to the hardware.

		Handle pre-hardware errors (like out of chain
		elements) for SMP requests.  That shouldn't happen
		either, since we should have enough space for two
		S/G elements in the standard request.

		For commands that end with
		MPI2_IOCSTATUS_SCSI_IOC_TERMINATED and
		MPI2_IOCSTATUS_SCSI_EXT_TERMINATED, return them
		with CAM_REQUEUE_REQ to retry them unconditionally.
		These seem to be related to back end, transport
		related problems that are hopefully transient.  We
		don't want to go through the retry count for
		something that is not a permanent error.

		Keep track of the number of outstanding I/Os.

mpsvar.h:	Track the number of free chain elements.

		Add variables for the number of outstanding I/Os,
		and I/O high water mark.

		Add variables to track the number of free chain
		buffers and the chain low water mark, as well as
		the number of chain allocation failures.

		Add I/O state flags and an attach done flag.

MFC after:	3 days
2011-02-18 17:06:06 +00:00
Kenneth D. Merry
9866848a62 In the MPS driver, during device removal processing, don't assume that
the controller firmware will return all of our commands.  Instead, keep
track of outstanding I/Os and return them to CAM once device removal
processing completes.

mpsvar.h:	Declare the new "io_list" in the mps_softc.

mps.c:		Initialize the new "io_list" in the mps softc.

mps_sas.c:	o Track SCSI I/O requests on the io_list from the
		  time of mpssas_action() through mpssas_scsiio_complete().
		o Zero out the request structures used for device
		  removal commands prior to filling them out.
		o Once the target reset task management function completes
		  during device removal processing, assume any SCSI I/O
		  commands that are still oustanding will never return
		  from the controller, and process them manually.

Submitted by:	gibbs
MFC after:	3 days
2011-02-18 17:01:57 +00:00
Matthew D Fleming
6dc7dc9a3e sysctl(9) cleanup checkpoint: amd64 GENERIC builds cleanly.
Commit the rest of the devices.
2011-01-12 19:53:56 +00:00
Kenneth D. Merry
d970279c91 Fix setting LUN numbers in the mps(4) driver.
Prior to this change, the addressing method wasn't getting set, and
so the LUN field could be set incorrectly in some instances.

This fix should allow for LUN numbers up to 16777215 (and return an error
for anything larger, which wouldn't fit into the flat addressing model).

Submitted by:	scottl (in part)
2010-12-11 00:36:35 +00:00
Kenneth D. Merry
49dfe4a2d4 Fix an event handling bug with the mps(4) driver.
This bug manifested itself after repeated device arrivals and
departures.  The root of the problem was that the last entry in the
reply array wasn't initialized/allocated.  So every time we got
around to that event, we had a bogus address.

There were a couple more problems with the code that are also fixed:

 - The reply mechanism was being treated as sequential (indexed by
   sc->replycurindex) even though the spec says that the driver
   should use the ReplyFrameAddress field of the post queue
   descriptor to figure out where the reply is.  There is no
   guarantee that the reply descriptors will be used in sequential
   order.

 - The second word of the reply post queue descriptor wasn't being
   checked in mps_intr_locked() to make sure that it wasn't
   0xffffffff.  So the driver could potentially come across a
   partially DMAed descriptor.

 - The number of replies allocated was one less than the actual
   size of the queue.  Instead, it was the size of the number of
   replies that can be used at one time.  (Which is one less than
   the size of the queue.)

mps.c:		When initializing the entries in the reply free
		queue, make sure we initialize the full number that
		we tell the chip we have (sc->fqdepth), not the
		number that can be used at any one time (sc->num_replies).

		When allocating replies, make sure we allocate the
		number of replies that we've told the chip exist,
		not just the number that can be used simultaneously.

		Use the ReplyFrameAddress field of the post queue
		descriptor to figure out which reply is being
		referenced.  This is what the spec says to do, and
		the spec doesn't guarantee that the replies will be
		used in order.

		Put a check in to verify that the reply address passed
		back from the card is valid.  (Panic if it isn't, we'll
		panic when we try to deference the reply pointer in any
		case.)

		In mps_intr_locked(), verify that the second word of the
		post queue descriptor is not 0xffffffff in addition to
		verifying that the unused flag is not set, so we can
		make sure we didn't get a partially DMAed descriptor.

		Remove references to sc->replycurindex, it isn't needed
		now.

mpsvar.h:	Remove replycurindex from the softc, it isn't needed now.

Reviewed by:	scottl
2010-12-10 21:45:10 +00:00
Kevin Lo
7df9d5acad Fix double ;; 2010-12-06 10:24:06 +00:00
Kenneth D. Merry
06e794928b Add Serial Management Protocol (SMP) passthrough support to CAM.
This includes support in the kernel, camcontrol(8), libcam and the mps(4)
driver for SMP passthrough.

The CAM SCSI probe code has been modified to fetch Inquiry VPD page 0x00
to determine supported pages, and will now fetch page 0x83 in addition to
page 0x80 if supported.

Add two new CAM CCBs, XPT_SMP_IO, and XPT_GDEV_ADVINFO.  The SMP CCB is
intended for SMP requests and responses.  The ADVINFO is currently used to
fetch cached VPD page 0x83 data from the transport layer, but is intended
to be extensible to fetch other types of device-specific data.

SMP-only devices are not currently represented in the CAM topology, and so
the current semantics are that the SIM will route SMP CCBs to either the
addressed device, if it contains an SMP target, or its parent, if it
contains an SMP target.  (This is noted in cam_ccb.h, since it will change
later once we have the ability to have SMP-only devices in CAM's topology.)

smp_all.c,
smp_all.h:		New helper routines for SMP.  This includes
			SMP request building routines, response parsing
			routines, error decoding routines, and structure
			definitions for a number of SMP commands.

libcam/Makefile:	Add smp_all.c to libcam, so that SMP functionality
			is available to userland applications.

camcontrol.8,
camcontrol.c:		Add smp passthrough support to camcontrol.  Several
			new subcommands are now available:

			'smpcmd' functions much like 'cmd', except that it
			allows the user to send generic SMP commands.

			'smprg' sends the SMP report general command, and
			displays the decoded output.  It will automatically
			fetch extended output if it is available.

			'smppc' sends the SMP phy control command, with any
			number of potential options.  Among other things,
			this allows the user to reset a phy on a SAS
			expander, or disable a phy on an expander.

			'smpmaninfo' sends the SMP report manufacturer
			information and displays the decoded output.

			'smpphylist' displays a list of phys on an
			expander, and the CAM devices attached to those
			phys, if any.

cam.h,
cam.c:			Add a status value for SMP errors
			(CAM_SMP_STATUS_ERROR).

			Add a missing description for CAM_SCSI_IT_NEXUS_LOST.

			Add support for SMP commands to cam_error_string().

cam_ccb.h:		Rename the CAM_DIR_RESV flag to CAM_DIR_BOTH.  SMP
			commands are by nature bi-directional, and we may
			need to support bi-directional SCSI commands later.

			Add the XPT_SMP_IO CCB.  Since SMP commands are
			bi-directional, there are pointers for both the
			request and response.

			Add a fill routine for SMP CCBs.

			Add the XPT_GDEV_ADVINFO CCB.  This is currently
			used to fetch cached page 0x83 data from the
			transport later, but is extensible to fetch many
			other types of data.

cam_periph.c:		Add support in cam_periph_mapmem() for XPT_SMP_IO
			and XPT_GDEV_ADVINFO CCBs.

cam_xpt.c:		Add support for executing XPT_SMP_IO CCBs.

cam_xpt_internal.h:	Add fields for VPD pages 0x00 and 0x83 in struct
			cam_ed.

scsi_all.c:		Add scsi_get_sas_addr(), a function that parses
			VPD page 0x83 data and pulls out a SAS address.

scsi_all.h:		Add VPD page 0x00 and 0x83 structures, and a
			prototype for scsi_get_sas_addr().

scsi_pass.c:		Add support for mapping buffers in XPT_SMP_IO and
			XPT_GDEV_ADVINFO CCBs.

scsi_xpt.c:		In the SCSI probe code, first ask the device for
			VPD page 0x00.  If any VPD pages are supported,
			that page is required to be implemented.  Based on
			the response, we may probe for the serial number
			(page 0x80) or device id (page 0x83).

			Add support for the XPT_GDEV_ADVINFO CCB.

sys/conf/files:		Add smp_all.c.

mps.c:			Add support for passing in a uio in mps_map_command(),
			so we can map a S/G list at once.

			Add support for SMP passthrough commands in
			mps_data_cb().  SMP is a special case, because the
			first buffer in the S/G list is outbound and the
			second buffer is inbound.

			Add support for warning the user if the busdma code
			comes back with more buffers than will work for the
			command.  This will, for example, help the user
			determine why an SMP command failed if busdma comes
			back with three buffers.

mps_pci.c:		Add sys/uio.h.

mps_sas.c:		Add the SAS address and the parent handle to the
			list of fields we pull from device page 0 and cache
			in struct mpssas_target.  These are needed for SMP
			passthrough.

			Add support for the XPT_SMP_IO CCB.  For now, this
			CCB is routed to the addressed device if it supports
			SMP, or to its parent if it does not and the parent
			does.  This is necessary because CAM does not
			currently support SMP-only nodes in the topology.

			Make SMP passthrough support conditional on
			__FreeBSD_version >= 900026.  This will make it
			easier to MFC this change to the driver without
			MFCing the CAM changes as well.

mps_user.c:		Un-staticize mpi_init_sge() so we can use it for
			the SMP passthrough code.

mpsvar.h:		Add a uio and iovecs into struct mps_command for
			SMP passthrough commands.

			Add a cm_max_segs field to struct mps_command so
			that we can warn the user if busdma comes back with
			too many segments.

			Clear the cm_reply when a command gets freed.  If
			it is not cleared, reply frames will eventually get
			freed into the pool multiple times and corrupt the
			pool.  (This fix is from scottl.)

			Add a prototype for mpi_init_sge().

sys/param.h:		Bump __FreeBSD_version to 900026 for the for the
			inclusion of the XPT_GDEV_ADVINFO and XPT_SMP_IO
			CAM CCBs.
2010-11-30 22:39:46 +00:00
Matthew D Fleming
09631173be Currently only opt_compat.h is included by the mps(4) driver. Also
enable /dev/mps0, which was missing from my previous patches enabling
f/w upload and download.

opt_compat.h issue noticed by scottl.
2010-10-15 15:24:59 +00:00
Matthew D Fleming
e658ccea60 Fixes to mps_user_command():
- fix the leak of command struct on error
 - simplify the cleanup logic
 - EINPROGRESS is not a fatal error
 - buggy comment and error message

Reviewed by:   ken
2010-10-14 23:26:08 +00:00
Matthew D Fleming
3f237b0b0c Support firmware download. 2010-10-14 16:44:44 +00:00
Matthew D Fleming
13ac67a784 Re-work the internals of adding items to the driver's scatter-gather
list.  Use the new internals to simplify adding transaction context
elements, and in future diffs, more complicated SGLs.
2010-10-14 16:44:05 +00:00
Matthew D Fleming
45b40ad0da Always set cm_complete_data before calling mps_config_complete().
Reviewed by:	ken
2010-10-12 19:24:29 +00:00
Matthew D Fleming
d95f15e7aa Re-work the internal user ioctl command table, and support the FW_UPLOAD
command.

Reviewed by:	ken (previous version)
2010-10-11 22:44:15 +00:00
Matthew D Fleming
452909d7d9 Add function prototypes for static functions.
Requested by:	ken
2010-10-11 22:44:05 +00:00
Matthew D Fleming
01095e3bf1 Fix a memory leak and locking inconsistency in mps(4) ioctl handling.
Check copyin(9) for error and sanity check the length before copyin.

Reviewed by:	ken
2010-10-11 21:38:31 +00:00
Matthew D Fleming
5ef9804274 Fix up the COMPAT_FREEBSD32 ioctl logic for mps(4).
Reviewed by:	ken
2010-10-11 21:26:24 +00:00
Kenneth D. Merry
1476ba4087 Turn on serialization of task management commands going down to the
controller, but make it optional.

After a problem report from Andrew Boyer, it looks like the LSI
chip may have issues (the watchdog timer fired) if too many aborts
are sent down to the chip at the same time.  We know that task
management commands are serialized, and although the manual doesn't
say it, it may be a good idea to just send one at a time.

But, since I'm not certain that this is necessary, add a tunable
and sysctl variable (hw.mps.%d.allow_multiple_tm_cmds) to control
the driver's behavior.

mps.c:		Add support for the sysctl and tunable, and add a
		comment about the possible return values to
		mps_map_command().

mps_sas.c:	Run all task management commands through two new
		routines, mpssas_issue_tm_request() and
		mpssas_complete_tm_request().

		This allows us to optionally serialize task
		management commands.  Also, change things so that
		the response to a task management command always
		comes back through the callback.  (Before it could
		come via the callback or the return value.)

mpsvar.h:	Add softc variables for the list of active task
		management commands, the number of active commands,
		and whether we should allow multiple active task
		management commands.  Add an active command flag.

mps.4:		Describe the new sysctl/loader tunable variable.

Sponsored by:	Spectra Logic Corporation
2010-10-07 21:56:10 +00:00
Kenneth D. Merry
0b883cf6b4 Fix a couple of mps problems.
When the driver is completely saturated with commands (1024 in the
case of the SAS2008 in my test system), I/O stops.  If we tell CAM
that we have one less command slot than we have actually allocated,
everything works fine.  We also need a few extra command slots to
allow for aborts and other task management commands to be sent down.

This needs more investigation to determine the root cause, but for
now this fixes things in my testing.

mps.c:		Change a printf() to mps_printf().

mps_sas.c:	Subtract 5 command slots when we tell CAM how many
		commands we can handle.

		Add some commented-out logic to print the contents
		the CDBs for timed-out commands.  This can help
		in debugging devices that are timing out.  This
		will be uncommented once I bring some CAM changes in.

Reported by:	Andrew Boyer <aboyer at averesystems dot com>
2010-09-17 21:53:56 +00:00
Kenneth D. Merry
63feedfd46 MFp4 (//depot/projects/mps/...):
According to the MPT2 spec, task management commands are
serialized, and so no I/O should start while task management
commands are active.

So, to comply with that, freeze the SIM queue before we send any
task management commands (abort, target reset, etc.) down to the
IOC.  We unfreeze the queue once the task management command
completes.

It isn't clear from the spec whether multiple simultaneous task
management commands are supported.  Right now it is possible to
have multiple outstanding task management commands, especially in
the abort case.  Multiple outstanding aborts do complete
successfully, so it may be supported.

We also don't yet have any recovery mechanism (e.g. reset the IOC)
if the task management command fails.
2010-09-16 22:54:56 +00:00
Kenneth D. Merry
cb1d2fe2cd MFp4: (//depot/projects/mps/...)
Report data overruns properly.

Submitted by:	scottl
2010-09-14 17:22:06 +00:00
Kenneth D. Merry
d3c7b9a08a MFp4 (//depot/projects/mps/...)
Bring in a driver for the LSI Logic MPT2 6Gb SAS controllers.

This driver supports basic I/O, and works with SAS and SATA drives and
expanders.

Basic error recovery works (i.e. timeouts and aborts) as well.

Integrated RAID isn't supported yet, and there are some known bugs.

So this isn't ready for production use, but is certainly ready for
testing and additional development.  For the moment, new commits to this
driver should go into the FreeBSD Perforce repository first
(//depot/projects/mps/...) and then get merged into -current once
they've been vetted.

This has only been added to the amd64 GENERIC, since that is the only
architecture I have tested this driver with.

Submitted by:	scottl
Discussed with:	imp, gibbs, will
Sponsored by:	Yahoo, Spectra Logic Corporation
2010-09-10 15:03:56 +00:00