1 /* SPDX-License-Identifier: GPL-2.0 */
6 #include "blk-mq-tag.h"
8 void blk_mq_sched_free_hctx_data(struct request_queue *q,
9 void (*exit)(struct blk_mq_hw_ctx *));
11 void blk_mq_sched_assign_ioc(struct request *rq);
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);
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);
28 void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
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);
35 blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
38 if (blk_queue_nomerges(q) || !bio_mergeable(bio))
41 return __blk_mq_sched_bio_merge(q, bio, nr_segs);
45 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
48 struct elevator_queue *e = q->elevator;
50 if (e && e->type->ops.allow_merge)
51 return e->type->ops.allow_merge(q, rq, bio);
56 static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
58 struct elevator_queue *e = rq->q->elevator;
60 if (e && e->type->ops.completed_request)
61 e->type->ops.completed_request(rq, now);
64 static inline void blk_mq_sched_requeue_request(struct request *rq)
66 struct request_queue *q = rq->q;
67 struct elevator_queue *e = q->elevator;
69 if (e && e->type->ops.requeue_request)
70 e->type->ops.requeue_request(rq);
73 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
75 struct elevator_queue *e = hctx->queue->elevator;
77 if (e && e->type->ops.has_work)
78 return e->type->ops.has_work(hctx);
83 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
85 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);