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-rw-r--r--block/blk-pm.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/block/blk-pm.h b/block/blk-pm.h
new file mode 100644
index 000000000000..1ffc8ef203ec
--- /dev/null
+++ b/block/blk-pm.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _BLOCK_BLK_PM_H_
+#define _BLOCK_BLK_PM_H_
+
+#include <linux/pm_runtime.h>
+
+#ifdef CONFIG_PM
+static inline void blk_pm_requeue_request(struct request *rq)
+{
+ if (rq->q->dev && !(rq->rq_flags & RQF_PM))
+ rq->q->nr_pending--;
+}
+
+static inline void blk_pm_add_request(struct request_queue *q,
+ struct request *rq)
+{
+ if (q->dev && !(rq->rq_flags & RQF_PM) && q->nr_pending++ == 0 &&
+ (q->rpm_status == RPM_SUSPENDED || q->rpm_status == RPM_SUSPENDING))
+ pm_request_resume(q->dev);
+}
+
+static inline void blk_pm_put_request(struct request *rq)
+{
+ if (rq->q->dev && !(rq->rq_flags & RQF_PM) && !--rq->q->nr_pending)
+ pm_runtime_mark_last_busy(rq->q->dev);
+}
+#else
+static inline void blk_pm_requeue_request(struct request *rq)
+{
+}
+
+static inline void blk_pm_add_request(struct request_queue *q,
+ struct request *rq)
+{
+}
+
+static inline void blk_pm_put_request(struct request *rq)
+{
+}
+#endif
+
+#endif /* _BLOCK_BLK_PM_H_ */