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Linux kernel mirror (for testing)
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kernel
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linux
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
8void blk_mq_sched_free_hctx_data(struct request_queue *q,
9 void (*exit)(struct blk_mq_hw_ctx *));
10
11void blk_mq_sched_assign_ioc(struct request *rq, struct bio *bio);
12
13void blk_mq_sched_request_inserted(struct request *rq);
14bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
15 struct request **merged_request);
16bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
17bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
18void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
19
20void blk_mq_sched_insert_request(struct request *rq, bool at_head,
21 bool run_queue, bool async);
22void 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
26void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
27
28int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
29void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
30
31static inline bool
32blk_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
40static inline bool
41blk_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
52static 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
60static 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
69static 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
78static 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
88static 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