Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
bd166ef1 JA |
2 | #ifndef BLK_MQ_SCHED_H |
3 | #define BLK_MQ_SCHED_H | |
4 | ||
2e9bc346 | 5 | #include "elevator.h" |
bd166ef1 JA |
6 | #include "blk-mq.h" |
7 | #include "blk-mq-tag.h" | |
8 | ||
d2a27964 | 9 | #define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ) |
d97e594c | 10 | |
e4d750c9 | 11 | bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, |
14ccb66b | 12 | unsigned int nr_segs, struct request **merged_request); |
179ae84f | 13 | bool blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio, |
14ccb66b | 14 | unsigned int nr_segs); |
fd2ef39c JK |
15 | bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq, |
16 | struct list_head *free); | |
7211aef8 | 17 | void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx); |
e9ea1596 | 18 | void __blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx); |
bd166ef1 | 19 | |
bd6737f1 | 20 | void blk_mq_sched_insert_request(struct request *rq, bool at_head, |
9e97d295 | 21 | bool run_queue, bool async); |
67cae4c9 | 22 | void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx, |
bd6737f1 JA |
23 | struct blk_mq_ctx *ctx, |
24 | struct list_head *list, bool run_queue_async); | |
25 | ||
bd166ef1 | 26 | void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx); |
bd166ef1 | 27 | |
6917ff0b | 28 | int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e); |
54d5329d | 29 | void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e); |
1820f4f0 | 30 | void blk_mq_sched_free_rqs(struct request_queue *q); |
bd166ef1 | 31 | |
e9ea1596 PB |
32 | static inline void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx) |
33 | { | |
34 | if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) | |
35 | __blk_mq_sched_restart(hctx); | |
36 | } | |
37 | ||
8addffd6 CH |
38 | static inline bool bio_mergeable(struct bio *bio) |
39 | { | |
40 | return !(bio->bi_opf & REQ_NOMERGE_FLAGS); | |
41 | } | |
42 | ||
bd166ef1 JA |
43 | static inline bool |
44 | blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq, | |
45 | struct bio *bio) | |
46 | { | |
2ff0682d JA |
47 | if (rq->rq_flags & RQF_ELV) { |
48 | struct elevator_queue *e = q->elevator; | |
bd166ef1 | 49 | |
2ff0682d JA |
50 | if (e->type->ops.allow_merge) |
51 | return e->type->ops.allow_merge(q, rq, bio); | |
52 | } | |
bd166ef1 JA |
53 | return true; |
54 | } | |
55 | ||
ed88660a | 56 | static inline void blk_mq_sched_completed_request(struct request *rq, u64 now) |
bd166ef1 | 57 | { |
2ff0682d JA |
58 | if (rq->rq_flags & RQF_ELV) { |
59 | struct elevator_queue *e = rq->q->elevator; | |
bd166ef1 | 60 | |
2ff0682d JA |
61 | if (e->type->ops.completed_request) |
62 | e->type->ops.completed_request(rq, now); | |
63 | } | |
bd166ef1 JA |
64 | } |
65 | ||
bd166ef1 JA |
66 | static inline void blk_mq_sched_requeue_request(struct request *rq) |
67 | { | |
2ff0682d JA |
68 | if (rq->rq_flags & RQF_ELV) { |
69 | struct request_queue *q = rq->q; | |
70 | struct elevator_queue *e = q->elevator; | |
bd166ef1 | 71 | |
2ff0682d JA |
72 | if ((rq->rq_flags & RQF_ELVPRIV) && e->type->ops.requeue_request) |
73 | e->type->ops.requeue_request(rq); | |
74 | } | |
bd166ef1 JA |
75 | } |
76 | ||
77 | static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx) | |
78 | { | |
79 | struct elevator_queue *e = hctx->queue->elevator; | |
80 | ||
f9cd4bfe JA |
81 | if (e && e->type->ops.has_work) |
82 | return e->type->ops.has_work(hctx); | |
bd166ef1 JA |
83 | |
84 | return false; | |
85 | } | |
86 | ||
bd166ef1 JA |
87 | static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx) |
88 | { | |
89 | return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); | |
90 | } | |
91 | ||
92 | #endif |