tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef BLK_MQ_SCHED_H
2#define BLK_MQ_SCHED_H
3
4#include "blk-mq.h"
5#include "blk-mq-tag.h"
6
7void blk_mq_sched_free_hctx_data(struct request_queue *q,
8 void (*exit)(struct blk_mq_hw_ctx *));
9
10void blk_mq_sched_assign_ioc(struct request *rq, struct bio *bio);
11
12void blk_mq_sched_request_inserted(struct request *rq);
13bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
14 struct request **merged_request);
15bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
16bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
17void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
18
19void blk_mq_sched_insert_request(struct request *rq, bool at_head,
20 bool run_queue, bool async, bool can_block);
21void blk_mq_sched_insert_requests(struct request_queue *q,
22 struct blk_mq_ctx *ctx,
23 struct list_head *list, bool run_queue_async);
24
25void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
26
27int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
28void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
29
30int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
31 unsigned int hctx_idx);
32void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
33 unsigned int hctx_idx);
34
35int blk_mq_sched_init(struct request_queue *q);
36
37static inline bool
38blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
39{
40 if (blk_queue_nomerges(q) || !bio_mergeable(bio))
41 return false;
42
43 return __blk_mq_sched_bio_merge(q, bio);
44}
45
46static inline bool
47blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
48 struct bio *bio)
49{
50 struct elevator_queue *e = q->elevator;
51
52 if (e && e->type->ops.mq.allow_merge)
53 return e->type->ops.mq.allow_merge(q, rq, bio);
54
55 return true;
56}
57
58static inline void blk_mq_sched_completed_request(struct request *rq)
59{
60 struct elevator_queue *e = rq->q->elevator;
61
62 if (e && e->type->ops.mq.completed_request)
63 e->type->ops.mq.completed_request(rq);
64}
65
66static inline void blk_mq_sched_started_request(struct request *rq)
67{
68 struct request_queue *q = rq->q;
69 struct elevator_queue *e = q->elevator;
70
71 if (e && e->type->ops.mq.started_request)
72 e->type->ops.mq.started_request(rq);
73}
74
75static inline void blk_mq_sched_requeue_request(struct request *rq)
76{
77 struct request_queue *q = rq->q;
78 struct elevator_queue *e = q->elevator;
79
80 if (e && e->type->ops.mq.requeue_request)
81 e->type->ops.mq.requeue_request(rq);
82}
83
84static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
85{
86 struct elevator_queue *e = hctx->queue->elevator;
87
88 if (e && e->type->ops.mq.has_work)
89 return e->type->ops.mq.has_work(hctx);
90
91 return false;
92}
93
94static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
95{
96 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
97}
98
99#endif