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scsi: libsas: Add sas_task_find_rq()

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blk-mq already provides a unique tag per request. Some libsas LLDDs - like
hisi_sas - already use this tag as the unique per-I/O HW tag.

Add a common function to provide the request associated with a sas_task for
all libsas LLDDs.

Signed-off-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1666091763-11023-2-git-send-email-john.garry@huawei.com
Reviewed-by: Jack Wang <jinpu.wang@ionos.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
John Garry 2022-10-18 19:15:57 +08:00 committed by Martin K. Petersen
parent 621a323c3a
commit a9ee3f8406
1 changed files with 18 additions and 0 deletions
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18
include/scsi/libsas.h
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@ -644,6 +644,24 @@ static inline bool sas_is_internal_abort(struct sas_task *task)
return task->task_proto == SAS_PROTOCOL_INTERNAL_ABORT;
}
static inline struct request *sas_task_find_rq(struct sas_task *task)
{
struct scsi_cmnd *scmd;
if (task->task_proto & SAS_PROTOCOL_STP_ALL) {
struct ata_queued_cmd *qc = task->uldd_task;
scmd = qc ? qc->scsicmd : NULL;
} else {
scmd = task->uldd_task;
}
if (!scmd)
return NULL;
return scsi_cmd_to_rq(scmd);
}
struct sas_domain_function_template {
/* The class calls these to notify the LLDD of an event. */
void (*lldd_port_formed)(struct asd_sas_phy *);