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authorJens Axboe <axboe@kernel.dk>2018-11-01 16:36:27 -0600
committerJens Axboe <axboe@kernel.dk>2018-11-07 13:42:32 -0700
commitf664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6 (patch)
treed49b6866c48f12638ae5e8dcbddf97d0074243e4 /include/scsi
parent3a7ea2c483a53fc89e336f69c6ee1d7defe00811 (diff)
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scsi: kill off the legacy IO path
This removes the legacy (non-mq) IO path for SCSI. Cc: linux-scsi@vger.kernel.org Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/scsi_host.h18
-rw-r--r--include/scsi/scsi_tcq.h14
2 files changed, 7 insertions, 25 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 5ea06d310a25..aa760df8c6b3 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -11,7 +11,6 @@
#include <linux/blk-mq.h>
#include <scsi/scsi.h>
-struct request_queue;
struct block_device;
struct completion;
struct module;
@@ -22,7 +21,6 @@ struct scsi_target;
struct Scsi_Host;
struct scsi_host_cmd_pool;
struct scsi_transport_template;
-struct blk_queue_tags;
/*
@@ -547,14 +545,8 @@ struct Scsi_Host {
struct scsi_host_template *hostt;
struct scsi_transport_template *transportt;
- /*
- * Area to keep a shared tag map (if needed, will be
- * NULL if not).
- */
- union {
- struct blk_queue_tag *bqt;
- struct blk_mq_tag_set tag_set;
- };
+ /* Area to keep a shared tag map */
+ struct blk_mq_tag_set tag_set;
atomic_t host_busy; /* commands actually active on low-level */
atomic_t host_blocked;
@@ -648,7 +640,6 @@ struct Scsi_Host {
/* The controller does not support WRITE SAME */
unsigned no_write_same:1;
- unsigned use_blk_mq:1;
unsigned use_cmd_list:1;
/* Host responded with short (<36 bytes) INQUIRY result */
@@ -742,11 +733,6 @@ static inline int scsi_host_in_recovery(struct Scsi_Host *shost)
shost->tmf_in_progress;
}
-static inline bool shost_use_blk_mq(struct Scsi_Host *shost)
-{
- return shost->use_blk_mq;
-}
-
extern int scsi_queue_work(struct Scsi_Host *, struct work_struct *);
extern void scsi_flush_work(struct Scsi_Host *);
diff --git a/include/scsi/scsi_tcq.h b/include/scsi/scsi_tcq.h
index e192a0caa850..6053d46e794e 100644
--- a/include/scsi/scsi_tcq.h
+++ b/include/scsi/scsi_tcq.h
@@ -23,19 +23,15 @@ static inline struct scsi_cmnd *scsi_host_find_tag(struct Scsi_Host *shost,
int tag)
{
struct request *req = NULL;
+ u16 hwq;
if (tag == SCSI_NO_TAG)
return NULL;
- if (shost_use_blk_mq(shost)) {
- u16 hwq = blk_mq_unique_tag_to_hwq(tag);
-
- if (hwq < shost->tag_set.nr_hw_queues) {
- req = blk_mq_tag_to_rq(shost->tag_set.tags[hwq],
- blk_mq_unique_tag_to_tag(tag));
- }
- } else {
- req = blk_map_queue_find_tag(shost->bqt, tag);
+ hwq = blk_mq_unique_tag_to_hwq(tag);
+ if (hwq < shost->tag_set.nr_hw_queues) {
+ req = blk_mq_tag_to_rq(shost->tag_set.tags[hwq],
+ blk_mq_unique_tag_to_tag(tag));
}
if (!req)