block/blk-pm.h

   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
   9 static 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
  19 static 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
  25 static 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
  33 static 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
  42 static 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
  50 static inline int blk_pm_resume_queue(const bool pm, struct request_queue *q)
  51 {
  52         return 1;
  53 }
  54
  55 static inline void blk_pm_mark_last_busy(struct request *rq)
  56 {
  57 }
  58
  59 static inline void blk_pm_requeue_request(struct request *rq)
  60 {
  61 }
  62
  63 static inline void blk_pm_add_request(struct request_queue *q,
  64                                       struct request *rq)
  65 {
  66 }
  67
  68 static inline void blk_pm_put_request(struct request *rq)
  69 {
  70 }
  71 #endif
  72
  73 #endif /* _BLOCK_BLK_PM_H_ */