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-rw-r--r--include/scsi/scsi_host.h18
1 files changed, 17 insertions, 1 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 5e8ebc1..ba20347 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -7,6 +7,7 @@
#include <linux/workqueue.h>
#include <linux/mutex.h>
#include <linux/seq_file.h>
+#include <linux/blk-mq.h>
#include <scsi/scsi.h>
struct request_queue;
@@ -510,6 +511,9 @@ struct scsi_host_template {
*/
unsigned int cmd_size;
struct scsi_host_cmd_pool *cmd_pool;
+
+ /* temporary flag to disable blk-mq I/O path */
+ bool disable_blk_mq;
};
/*
@@ -580,7 +584,10 @@ struct Scsi_Host {
* Area to keep a shared tag map (if needed, will be
* NULL if not).
*/
- struct blk_queue_tag *bqt;
+ union {
+ struct blk_queue_tag *bqt;
+ struct blk_mq_tag_set tag_set;
+ };
atomic_t host_busy; /* commands actually active on low-level */
atomic_t host_blocked;
@@ -672,6 +679,8 @@ struct Scsi_Host {
/* The controller does not support WRITE SAME */
unsigned no_write_same:1;
+ unsigned use_blk_mq:1;
+
/*
* Optional work queue to be utilized by the transport
*/
@@ -772,6 +781,13 @@ static inline int scsi_host_in_recovery(struct Scsi_Host *shost)
shost->tmf_in_progress;
}
+extern bool scsi_use_blk_mq;
+
+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 *);
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