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_free_hctx_data(struct request_queue *q, 9 void (*exit)(struct blk_mq_hw_ctx *)); 10 11 void blk_mq_sched_assign_ioc(struct request *rq); 12 13 void blk_mq_sched_request_inserted(struct request *rq); 14 bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, 15 unsigned int nr_segs, struct request **merged_request); 16 bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio, 17 unsigned int nr_segs); 18 bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq); 19 void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx); 20 void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx); 21 22 void blk_mq_sched_insert_request(struct request *rq, bool at_head, 23 bool run_queue, bool async); 24 void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx, 25 struct blk_mq_ctx *ctx, 26 struct list_head *list, bool run_queue_async); 27 28 void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx); 29 30 int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e); 31 void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e); 32 void blk_mq_sched_free_requests(struct request_queue *q); 33 34 static inline bool 35 blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio, 36 unsigned int nr_segs) 37 { 38 if (blk_queue_nomerges(q) || !bio_mergeable(bio)) 39 return false; 40 41 return __blk_mq_sched_bio_merge(q, bio, nr_segs); 42 } 43 44 static inline bool 45 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq, 46 struct bio *bio) 47 { 48 struct elevator_queue *e = q->elevator; 49 50 if (e && e->type->ops.allow_merge) 51 return e->type->ops.allow_merge(q, rq, bio); 52 53 return true; 54 } 55 56 static inline void blk_mq_sched_completed_request(struct request *rq, u64 now) 57 { 58 struct elevator_queue *e = rq->q->elevator; 59 60 if (e && e->type->ops.completed_request) 61 e->type->ops.completed_request(rq, now); 62 } 63 64 static inline void blk_mq_sched_requeue_request(struct request *rq) 65 { 66 struct request_queue *q = rq->q; 67 struct elevator_queue *e = q->elevator; 68 69 if (e && e->type->ops.requeue_request) 70 e->type->ops.requeue_request(rq); 71 } 72 73 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx) 74 { 75 struct elevator_queue *e = hctx->queue->elevator; 76 77 if (e && e->type->ops.has_work) 78 return e->type->ops.has_work(hctx); 79 80 return false; 81 } 82 83 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx) 84 { 85 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); 86 } 87 88 #endif 89