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, struct bio *bio); 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 struct request **merged_request); 16 bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio); 17 bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq); 18 void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx); 19 20 void blk_mq_sched_insert_request(struct request *rq, bool at_head, 21 bool run_queue, bool async); 22 void blk_mq_sched_insert_requests(struct request_queue *q, 23 struct blk_mq_ctx *ctx, 24 struct list_head *list, bool run_queue_async); 25 26 void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx); 27 28 int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e); 29 void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e); 30 31 int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx, 32 unsigned int hctx_idx); 33 void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx, 34 unsigned int hctx_idx); 35 36 static inline bool 37 blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio) 38 { 39 if (blk_queue_nomerges(q) || !bio_mergeable(bio)) 40 return false; 41 42 return __blk_mq_sched_bio_merge(q, bio); 43 } 44 45 static inline bool 46 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq, 47 struct bio *bio) 48 { 49 struct elevator_queue *e = q->elevator; 50 51 if (e && e->type->ops.mq.allow_merge) 52 return e->type->ops.mq.allow_merge(q, rq, bio); 53 54 return true; 55 } 56 57 static inline void blk_mq_sched_completed_request(struct request *rq) 58 { 59 struct elevator_queue *e = rq->q->elevator; 60 61 if (e && e->type->ops.mq.completed_request) 62 e->type->ops.mq.completed_request(rq); 63 } 64 65 static inline void blk_mq_sched_started_request(struct request *rq) 66 { 67 struct request_queue *q = rq->q; 68 struct elevator_queue *e = q->elevator; 69 70 if (e && e->type->ops.mq.started_request) 71 e->type->ops.mq.started_request(rq); 72 } 73 74 static inline void blk_mq_sched_requeue_request(struct request *rq) 75 { 76 struct request_queue *q = rq->q; 77 struct elevator_queue *e = q->elevator; 78 79 if (e && e->type->ops.mq.requeue_request) 80 e->type->ops.mq.requeue_request(rq); 81 } 82 83 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx) 84 { 85 struct elevator_queue *e = hctx->queue->elevator; 86 87 if (e && e->type->ops.mq.has_work) 88 return e->type->ops.mq.has_work(hctx); 89 90 return false; 91 } 92 93 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx) 94 { 95 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); 96 } 97 98 #endif 99