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
blk_mq_sched_bio_merge(struct request_queue * q,struct bio * bio,unsigned int nr_segs)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
blk_mq_sched_allow_merge(struct request_queue * q,struct request * rq,struct bio * bio)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
blk_mq_sched_completed_request(struct request * rq,u64 now)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
blk_mq_sched_requeue_request(struct request * rq)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
blk_mq_sched_has_work(struct blk_mq_hw_ctx * hctx)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
blk_mq_sched_needs_restart(struct blk_mq_hw_ctx * hctx)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
