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authorJohn Garry <john.garry@huawei.com>2022-10-18 19:15:57 +0800
committerMartin K. Petersen <martin.petersen@oracle.com>2022-10-22 03:02:51 +0000
commita9ee3f840646e2ec419c734e592ffe997195435e (patch)
tree36aa4098783645411c691a388f7f72ed3c8c6659 /include/scsi/libsas.h
parent621a323c3a7e23b364deaddf769e731f2da6ff03 (diff)
scsi: libsas: Add sas_task_find_rq()
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>
Diffstat (limited to 'include/scsi/libsas.h')
-rw-r--r--include/scsi/libsas.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index ec6c9ecd8d12..1aee3d0ebbb2 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -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 *);