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_ */ 74