]> git.baikalelectronics.ru Git - kernel.git/commit
megaraid_sas: Task management support
authorSumit Saxena <sumit.saxena@avagotech.com>
Thu, 28 Jan 2016 15:34:25 +0000 (21:04 +0530)
committerMartin K. Petersen <martin.petersen@oracle.com>
Wed, 24 Feb 2016 02:27:02 +0000 (21:27 -0500)
commit07c52b0017babe8a9b007e3b0ce6f72b3aed9e9a
treed776d9ff2aff21a03b8c910565d2c725b418fe76
parente1365dbf5362c78d3d55c9595c43fe23c09bc4ff
megaraid_sas: Task management support

This patch adds task management for SCSI commands. Added functions are
task abort and target reset.

1. Currently, megaraid_sas driver performs controller reset when any IO
times out.  With task management support added, task abort and target
reset will be tried to recover timed out IO. If task management fails,
then controller reset will be performaned. If the task management
request times out, fail the request and escalate to the next
level (controller reset).

2. mr_device_priv_data will be allocated for all generations of
controller, but is_tm_capable flag will never be set for
controllers (prior to Invader series) as firmware support is not
available for task management.

3. Task management capable firmware will set is_tm_capable flag in
firmware API.

Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
drivers/scsi/megaraid/megaraid_sas.h
drivers/scsi/megaraid/megaraid_sas_base.c
drivers/scsi/megaraid/megaraid_sas_fusion.c
drivers/scsi/megaraid/megaraid_sas_fusion.h