diff options
| author | John Garry <john.garry@huawei.com> | 2022-10-18 19:16:03 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-10-22 03:02:52 +0000 |
| commit | 2acf97f199f9eba8321390325519e9b6bff60108 (patch) | |
| tree | a499918c381f5c049220d8bba92a22010915a704 /drivers/scsi/mvsas/mv_defs.h | |
| parent | ffc9f9bf3f14876d019f67ef17d41138802529a8 (diff) | |
scsi: mvsas: Use sas_task_find_rq() for tagging
The request associated with a SCSI command coming from the block layer has
a unique tag, so use that when possible for getting a slot.
Unfortunately we don't support reserved commands in the SCSI midlayer yet.
As such, SMP tasks - as an example - will not have a request associated, so
in the interim continue to manage those tags for that type of sas_task
internally.
We reserve an arbitrary 4 tags for these internal tags. Indeed, we already
decrement MVS_RSVD_SLOTS by 2 for the shost can_queue when flag
MVF_FLAG_SOC is set. This change was made in commit 20b09c2992fe ("[SCSI]
mvsas: add support for 94xx; layout change; bug fixes"), but what those 2
slots are used for is not obvious.
Also make the tag management functions static, where possible.
Signed-off-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1666091763-11023-8-git-send-email-john.garry@huawei.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/mvsas/mv_defs.h')
| -rw-r--r-- | drivers/scsi/mvsas/mv_defs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/mvsas/mv_defs.h b/drivers/scsi/mvsas/mv_defs.h index 7123a2efbf58..8ef174cd4d37 100644 --- a/drivers/scsi/mvsas/mv_defs.h +++ b/drivers/scsi/mvsas/mv_defs.h @@ -40,6 +40,7 @@ enum driver_configuration { MVS_ATA_CMD_SZ = 96, /* SATA command table buffer size */ MVS_OAF_SZ = 64, /* Open address frame buffer size */ MVS_QUEUE_SIZE = 64, /* Support Queue depth */ + MVS_RSVD_SLOTS = 4, MVS_SOC_CAN_QUEUE = MVS_SOC_SLOTS - 2, }; |