On encountering unexpected error conditions from driver initiated
commands, print something useful like CDB and sense data rather than
something useless like the kernel virtual address of the command buffer.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Do no rescan on every events -- way too many rescans are
triggered if we don't filter the events. Limit rescans
to be triggered by the following set of events:
* controller state change
* enclosure hot plug
* physical drive state change
* logical drive state change
* redundant controller state change
* accelerated io enabled/disabled
* accelerated io configuration change
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Add controller-based data-at-rest encryption compatibility
to ioaccel2 path (HP SSD Smart Path).
Encryption feature requires driver to supply additional fields
for encryption enable, tweak index, and data encryption key index
in the ioaccel2 request structure.
Encryption enable flag and data encryption key index come from
raid_map data structure from raid offload command.
During ioaccel2 submission, check device structure's raid map to see if
encryption is enabled for the device. If so, call new function below.
Add function set_encrypt_ioaccel2 to set encryption flag, data encryption key
index, and calculate tweak value from request's logical block address.
Signed-off-by: Scott Teel <scott.teel@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Change the handling of HP SSD Smart Path errors with status:
0x02 CHECK CONDITION
0x08 BUSY
0x18 RESERVATION CONFLICT
0x40 TASK ABORTED
So that they get retried on the RAID Path.
Signed-off-by: Scott Teel <scott.teel@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Code was confused and assumed that page zero was not
VPD page and all non-zero pages were VPD pages.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Allow driver to schedule a rescan whenever a request fails on the ioaccel2 path.
This eliminates the possibility of driver getting stuck in non-ioaccel mode.
IOaccel mode (HP SSD Smart Path) is disabled by driver upon error detection.
Driver relied on idea that request would be retried through normal path, and a
subsequent error would occur on that path, and be processed by controller
firmware. As part of that process, controller disables ioaccel mode and later
reinstates it, signalling driver to change modes.
In some error cases, the error will not duplicate on the standard path,
so the driver could get stuck in non-ioaccel mode.
To avoid that, we allow driver to request a rescan during the next run of the
rescan thread.
Signed-off-by: Scott Teel <scott.teel@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Allow SSD Smart Path for a controller to be disabled by
the user, regardless of settings in controller firmware
or array configuration.
To disable: echo 0 > /sys/class/scsi_host/host<id>/acciopath_status
To re-enable: echo 1 > /sys/class/scsi_host/host<id>/acciopath_status
To check state: cat /sys/class/scsi_host/host<id>/acciopath_status
Signed-off-by: Scott Teel <scott.teel@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Otherwise we could wind up using incorrect raid map data, and
then very bad things would likely happen.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Underlying firmware cannot handle task abort on accelerated path (SSD Smart Path).
Change abort requests for accelerated path commands to physical target reset.
Send reset request on normal IO path.
Signed-off-by: Scott Teel <scott.teel@hp.com>
Signed-off-by: Mike Miller <michael.miller@canonical.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Stephen M. Cameron
Scott Teel
Mike MIller