aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi/libsas/sas_scsi_host.c
Commit message (Collapse)AuthorAgeFilesLines
* [SCSI] sas_scsi_host: Convert to use the kthread APIChristoph Hellwig2007-05-061-23/+13
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: Add an LU reset mechanism to the error handlerDarrick J. Wong2007-02-031-4/+36
| | | | | | | | | After discussion with andmike and dougg, it seems that the purpose of eh_device_reset_handler is to issue LU resets, and that eh_bus_reset_handler would be a more appropriate place for a phy reset. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: fix task attributeFUJITA Tomonori2007-01-301-1/+1
| | | | | | | Why TASK_ATTR_HOQ? Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: Enable automatic spin-up of SAS disksDarrick J. Wong2007-01-271-0/+2
| | | | | | | Set allow_restart=1 for all SAS disks so that they are spun up when needed. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: Handle SCSI commands that complete with failure codesDarrick J. Wong2007-01-271-44/+104
| | | | | | | | | | | | | | This patch moves the code that handles SAS failures out of the main EH function and into a separate function. It also detects commands that have no sas_task (i.e. they completed, but with error data) and sends them into scsi_error for processing. This allows us to handle SCSI errors (and enables auto-spinup as a side effect) instead of dropping them on the floor and falling into an infinite loop. It also requires the implementation of a device reset function, which the SAS failure code has been modified to employ for REQ_DEVICE_RESET. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: Start I_T recovery if ABORT TASK failsDarrick J. Wong2007-01-131-3/+11
| | | | | | | | The EH should fall into I_T recovery (and potentially stronger remedies) if ABORT TASK fails. Signed-off-by: Alexis Bruemmer <alexisb@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: phy port lock needs irq spinlocksDarrick J. Wong2007-01-131-2/+3
| | | | | | | Convert the phy port locks to use irq spinlocks. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: Delay issuing ABORT TASK TMF until the error handlerDarrick J. Wong2007-01-131-22/+29
| | | | | | | | | | | | | | | sas_task_abort() should simply abort the upper-level SCSI command and wait until the error handler to send the actual ABORT TASK command. By deferring things to the EH we simplify the concurrency coordination and eliminate some race conditions. Note that sas_task_abort has a few hooks to handle libsas internal commands properly too. Also rename do_sas_task_abort to __sas_task_abort just in case we really want to abort the task *right now* and we don't have a scsi_cmnd attached to the command. This is a hook for libata internal commands to abort. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: Enable the EH strategy handler to reset a phy after a commandDarrick J. Wong2007-01-131-1/+36
| | | | | | | | | | | When a SAS LLDD needs to request a device port reset, it needs to have all commands aborted before it can reset the port. Since commands are put on the EH's list in the order that they were queued, the LLDD can set a "need reset" flag in the last task to be aborted so that the EH can reset the port after all commands are aborted. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: Remove SAS_TASK_INITIATOR_ABORTED flagDarrick J. Wong2007-01-131-17/+0
| | | | | | | | | This flag is no longer necessary because we push tasks to be aborted into the EH as soon as we possibly can, and let the SCSI EH code take care of the coordination for which this flag was used. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: Reset timer on taskless scsi_cmnds in sas_scsi_timed_outDarrick J. Wong2007-01-131-3/+7
| | | | | | | | | | | | | | | | Every so often, a scsi_cmnd will time out, and the libsas timeout handler will discover that the scsi_cmnd does not have a sas_task attached to it. This can happen in two cases: (1) the scsi_cmnd actually made it through libsas to the HBA and is now going through scsi_done, or (2) the scsi_cmnd has been held up (host lock, slab alloc, etc) and libsas has not yet attached a sas_task. In both cases, it is safe to ask SCSI for more time to process the command via EH_RESET_TIMER; we cannot blindly return EH_HANDLED because if (2) happens, we could end up calling scsi_done while another CPU is heading towards sas_queuecommand, which causes slab corruption when sas_task_done updates the freed scsi_cmnd. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: Add a sysfs knob to enable/disable a phyDarrick J. Wong2007-01-131-0/+1
| | | | | | | | | | This patch lets a user arbitrarily enable or disable a phy via sysfs. Potential applications include shutting down a phy to replace one lane of wide port, and (more importantly) providing a method for the libata SATL to control the phy. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: Don't give scsi_cmnds to the EH if they never made it to the ↵Darrick J. Wong2007-01-131-0/+7
| | | | | | | | | | | | | | | | | | | | | SAS LLDD or have already returned On a system with many SAS targets, it appears possible that a scsi_cmnd can time out without ever making it to the SAS LLDD or at the same time that a completion is occurring. In both of these cases, telling the LLDD to abort the sas_task makes no sense because the LLDD won't know about the sas_task; what we really want to do is to increase the timer. Note that this involves creating another sas_task bit to indicate whether or not the task has been sent to the LLDD; I could have implemented this by slightly redefining SAS_TASK_STATE_PENDING, but this way seems cleaner. This second version amends the aic94xx portion to set the TASK_AT_INITIATOR flag for all sas_tasks that were passed to lldd_execute_task. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* Actually update the fixed up compile failures.David Howells2006-12-061-1/+3
| | | | Signed-Off-By: David Howells <dhowells@redhat.com>
* [PATCH] aic94xx: handle REQ_DEVICE_RESETDarrick J. Wong2006-11-221-0/+1
| | | | | | | | | | | | | This patch implements a REQ_DEVICE_RESET handler for the aic94xx driver. Like the earlier REQ_TASK_ABORT patch, this patch defers the device reset to the Scsi_Host's workqueue, which has the added benefit of ensuring that the device reset does not happen at the same time that the abort tmfs are being processed. After the phy reset, the busted drive should go away and be re-detected later, which is indeed what I've seen on both a x260 and a x206m. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: add sas_abort_taskDarrick J. Wong2006-11-151-0/+60
| | | | | | | | | | This patch adds an external function, sas_abort_task, to enable LLDDs to abort sas_tasks. It also adds a work_struct so that the actual work of aborting a task can be shifted from tasklet context (in the LLDD) onto the scsi_host's workqueue. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] libsas: modify error handler to use scsi_eh_* functionsDarrick J. Wong2006-11-151-4/+25
| | | | | | | | | | | This patch adds an EH done queue to sas_ha, converts the error handling strategy function and the sas_scsi_task_done functions in libsas to use the scsi_eh_* commands for error'd commands, and adds checks for the INITIATOR_ABORTED flag so that we do the right thing if a sas_task has been aborted by the initiator. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [PATCH] SCSI: fix request flag-related build breakageJeff Garzik2006-09-301-1/+1
| | | | | | | | | The ->flags in struct request was split into two variables, in a recent changeset. The merge of this change forgot to update SCSI's libsas, probably because libsas was a very recent merge. Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] SCSI gfp_t annotationsAl Viro2006-09-241-1/+1
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [SCSI] aic94xx: new driverJames Bottomley2006-08-291-0/+786
This is the end point of the separate aic94xx driver based on the original driver and transport class from Luben Tuikov <ltuikov@yahoo.com> The log of the separate development is: Alexis Bruemmer: o aic94xx: fix hotplug/unplug for expanderless systems o aic94xx: disable split completion timer/setting by default o aic94xx: wide port off expander support o aic94xx: remove various inline functions o aic94xx: use bitops o aic94xx: remove queue comment o aic94xx: remove sas_common.c o aic94xx: sas remove depot's o aic94xx: use available list_for_each_entry_safe_reverse() o aic94xx: sas header file merge James Bottomley: o aic94xx: fix TF_TMF_NO_CTX processing o aic94xx: convert to request_firmware interface o aic94xx: fix hotplug/unplug o aic94xx: add link error counts to the expander phys o aic94xx: add transport class phy reset capability o aic94xx: remove local_attached flag o Remove README o Fixup Makefile variable for libsas rename o Rename sas->libsas o aic94xx: correct return code for sas_discover_event o aic94xx: use parent backlink port o aic94xx: remove channel abstraction o aic94xx: fix routing algorithms o aic94xx: add backlink port o aic94xx: fix cascaded expander properties o aic94xx: fix sleep under lock o aic94xx: fix panic on module removal in complex topology o aic94xx: make use of the new sas_port o rename sas_port to asd_sas_port o Fix for eh_strategy_handler move o aic94xx: move entirely over to correct transport class formulation o remove last vestages of sas_rphy_alloc() o update for eh_timed_out move o Preliminary expander support for aic94xx o sas: remove event thread o minor warning cleanups o remove last vestiges of id mapping arrays o Further updates o Convert aic94xx over entirely to the transport class end device and o update aic94xx/sas to use the new sas transport class end device o [PATCH] aic94xx: attaching to the sas transport class o Add missing completion removal from prior patch o [PATCH] aic94xx: attaching to the sas transport class o Build fixes from akpm Jeff Garzik: o [scsi aic94xx] Remove ->owner from PCI info table Luben Tuikov: o initial aic94xx driver Mike Anderson: o aic94xx: fix panic on module insertion o aic94xx: stub out SATA_DEV case o aic94xx: compile warning cleanups o aic94xx: sas_alloc_task o aic94xx: ref count update o aic94xx nexus loss time value o [PATCH] aic94xx: driver assertion in non-x86 BIOS env Randy Dunlap: o libsas: externs not needed Robert Tarte: o aic94xx: sequence patch - fixes SATA support Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
generated by cgit v1.1 at 2024-10-31 09:57:35 +0000