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 static inline bool 32 blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio) 33 { 34 if (blk_queue_nomerges(q) || !bio_mergeable(bio)) 35 return false; 36 37 return __blk_mq_sched_bio_merge(q, bio); 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.mq.allow_merge) 47 return e->type->ops.mq.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.mq.completed_request) 57 e->type->ops.mq.completed_request(rq, now); 58 } 59 60 static inline void blk_mq_sched_started_request(struct request *rq) 61 { 62 struct request_queue *q = rq->q; 63 struct elevator_queue *e = q->elevator; 64 65 if (e && e->type->ops.mq.started_request) 66 e->type->ops.mq.started_request(rq); 67 } 68 69 static inline void blk_mq_sched_requeue_request(struct request *rq) 70 { 71 struct request_queue *q = rq->q; 72 struct elevator_queue *e = q->elevator; 73 74 if (e && e->type->ops.mq.requeue_request) 75 e->type->ops.mq.requeue_request(rq); 76 } 77 78 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx) 79 { 80 struct elevator_queue *e = hctx->queue->elevator; 81 82 if (e && e->type->ops.mq.has_work) 83 return e->type->ops.mq.has_work(hctx); 84 85 return false; 86 } 87 88 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx) 89 { 90 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); 91 } 92 93 #endif 94