xref: /kernel/linux/linux-5.10/block/blk-pm.h (revision 8c2ecf20) 
1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef _BLOCK_BLK_PM_H_
4#define _BLOCK_BLK_PM_H_
5
6#include <linux/pm_runtime.h>
7
8#ifdef CONFIG_PM
9static inline int blk_pm_resume_queue(const bool pm, struct request_queue *q)
10{
11	if (!q->dev || !blk_queue_pm_only(q))
12		return 1;	/* Nothing to do */
13	if (pm && q->rpm_status != RPM_SUSPENDED)
14		return 1;	/* Request allowed */
15	pm_request_resume(q->dev);
16	return 0;
17}
18
19static inline void blk_pm_mark_last_busy(struct request *rq)
20{
21	if (rq->q->dev && !(rq->rq_flags & RQF_PM))
22		pm_runtime_mark_last_busy(rq->q->dev);
23}
24
25static inline void blk_pm_requeue_request(struct request *rq)
26{
27	lockdep_assert_held(&rq->q->queue_lock);
28
29	if (rq->q->dev && !(rq->rq_flags & RQF_PM))
30		rq->q->nr_pending--;
31}
32
33static inline void blk_pm_add_request(struct request_queue *q,
34				      struct request *rq)
35{
36	lockdep_assert_held(&q->queue_lock);
37
38	if (q->dev && !(rq->rq_flags & RQF_PM))
39		q->nr_pending++;
40}
41
42static inline void blk_pm_put_request(struct request *rq)
43{
44	lockdep_assert_held(&rq->q->queue_lock);
45
46	if (rq->q->dev && !(rq->rq_flags & RQF_PM))
47		--rq->q->nr_pending;
48}
49#else
50static inline int blk_pm_resume_queue(const bool pm, struct request_queue *q)
51{
52	return 1;
53}
54
55static inline void blk_pm_mark_last_busy(struct request *rq)
56{
57}
58
59static inline void blk_pm_requeue_request(struct request *rq)
60{
61}
62
63static inline void blk_pm_add_request(struct request_queue *q,
64				      struct request *rq)
65{
66}
67
68static inline void blk_pm_put_request(struct request *rq)
69{
70}
71#endif
72
73#endif /* _BLOCK_BLK_PM_H_ */
74