1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef BLK_MQ_SCHED_H 3 #define BLK_MQ_SCHED_H 4 5 #include "blk-mq.h" 6 #include "blk-mq-tag.h" 7 8 void blk_mq_sched_assign_ioc(struct request *rq); 9 10 void blk_mq_sched_request_inserted(struct request *rq); 11 bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, 12 unsigned int nr_segs, struct request **merged_request); 13 bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio, 14 unsigned int nr_segs); 15 bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq); 16 void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx); 17 void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx); 18 19 void blk_mq_sched_insert_request(struct request *rq, bool at_head, 20 bool run_queue, bool async); 21 void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx, 22 struct blk_mq_ctx *ctx, 23 struct list_head *list, bool run_queue_async); 24 25 void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx); 26 27 int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e); 28 void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e); 29 void blk_mq_sched_free_requests(struct request_queue *q); 30 31 static inline bool 32 blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio, 33 unsigned int nr_segs) 34 { 35 if (blk_queue_nomerges(q) || !bio_mergeable(bio)) 36 return false; 37 38 return __blk_mq_sched_bio_merge(q, bio, nr_segs); 39 } 40 41 static inline bool 42 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq, 43 struct bio *bio) 44 { 45 struct elevator_queue *e = q->elevator; 46 47 if (e && e->type->ops.allow_merge) 48 return e->type->ops.allow_merge(q, rq, bio); 49 50 return true; 51 } 52 53 static inline void blk_mq_sched_completed_request(struct request *rq, u64 now) 54 { 55 struct elevator_queue *e = rq->q->elevator; 56 57 if (e && e->type->ops.completed_request) 58 e->type->ops.completed_request(rq, now); 59 } 60 61 static inline void blk_mq_sched_requeue_request(struct request *rq) 62 { 63 struct request_queue *q = rq->q; 64 struct elevator_queue *e = q->elevator; 65 66 if ((rq->rq_flags & RQF_ELVPRIV) && e && e->type->ops.requeue_request) 67 e->type->ops.requeue_request(rq); 68 } 69 70 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx) 71 { 72 struct elevator_queue *e = hctx->queue->elevator; 73 74 if (e && e->type->ops.has_work) 75 return e->type->ops.has_work(hctx); 76 77 return false; 78 } 79 80 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx) 81 { 82 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); 83 } 84 85 #endif 86