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