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gerrit-public.fairphone.software / kernel / msm-5.4 / bd6737f1ae92e2f1c6e8362efe96dbe7f18fa07d / . / block / blk-mq-sched.h
blob: 9478aaeb48c59b9a72e40e9e465e39f0e24df437 [file] [log] [blame]
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]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
7int blk_mq_sched_init_hctx_data(struct request_queue *q, size_t size,
8 int (*init)(struct blk_mq_hw_ctx *),
9 void (*exit)(struct blk_mq_hw_ctx *));
10
11void blk_mq_sched_free_hctx_data(struct request_queue *q,
12 void (*exit)(struct blk_mq_hw_ctx *));
13
14struct request *blk_mq_sched_get_request(struct request_queue *q, struct bio *bio, unsigned int op, struct blk_mq_alloc_data *data);
15void blk_mq_sched_put_request(struct request *rq);
16
17void blk_mq_sched_request_inserted(struct request *rq);
18bool blk_mq_sched_bypass_insert(struct blk_mq_hw_ctx *hctx, struct request *rq);
19bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio);
20bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
21bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
Jens Axboe50e1dab2017-01-26 14:42:34 -0700[diff] [blame]22void blk_mq_sched_restart_queues(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]23
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame^]24void blk_mq_sched_insert_request(struct request *rq, bool at_head,
25 bool run_queue, bool async, bool can_block);
26void blk_mq_sched_insert_requests(struct request_queue *q,
27 struct blk_mq_ctx *ctx,
28 struct list_head *list, bool run_queue_async);
29
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]30void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
31void blk_mq_sched_move_to_dispatch(struct blk_mq_hw_ctx *hctx,
32 struct list_head *rq_list,
33 struct request *(*get_rq)(struct blk_mq_hw_ctx *));
34
35int blk_mq_sched_setup(struct request_queue *q);
36void blk_mq_sched_teardown(struct request_queue *q);
37
Jens Axboed3484992017-01-13 14:43:58 -0700[diff] [blame]38int blk_mq_sched_init(struct request_queue *q);
39
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]40static inline bool
41blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
42{
43 struct elevator_queue *e = q->elevator;
44
45 if (!e || blk_queue_nomerges(q) || !bio_mergeable(bio))
46 return false;
47
48 return __blk_mq_sched_bio_merge(q, bio);
49}
50
51static inline int blk_mq_sched_get_rq_priv(struct request_queue *q,
52 struct request *rq)
53{
54 struct elevator_queue *e = q->elevator;
55
56 if (e && e->type->ops.mq.get_rq_priv)
57 return e->type->ops.mq.get_rq_priv(q, rq);
58
59 return 0;
60}
61
62static inline void blk_mq_sched_put_rq_priv(struct request_queue *q,
63 struct request *rq)
64{
65 struct elevator_queue *e = q->elevator;
66
67 if (e && e->type->ops.mq.put_rq_priv)
68 e->type->ops.mq.put_rq_priv(q, rq);
69}
70
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]71static inline bool
72blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
73 struct bio *bio)
74{
75 struct elevator_queue *e = q->elevator;
76
77 if (e && e->type->ops.mq.allow_merge)
78 return e->type->ops.mq.allow_merge(q, rq, bio);
79
80 return true;
81}
82
83static inline void
84blk_mq_sched_completed_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
85{
86 struct elevator_queue *e = hctx->queue->elevator;
87
88 if (e && e->type->ops.mq.completed_request)
89 e->type->ops.mq.completed_request(hctx, rq);
90
91 BUG_ON(rq->internal_tag == -1);
92
93 blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]94}
95
96static inline void blk_mq_sched_started_request(struct request *rq)
97{
98 struct request_queue *q = rq->q;
99 struct elevator_queue *e = q->elevator;
100
101 if (e && e->type->ops.mq.started_request)
102 e->type->ops.mq.started_request(rq);
103}
104
105static inline void blk_mq_sched_requeue_request(struct request *rq)
106{
107 struct request_queue *q = rq->q;
108 struct elevator_queue *e = q->elevator;
109
110 if (e && e->type->ops.mq.requeue_request)
111 e->type->ops.mq.requeue_request(rq);
112}
113
114static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
115{
116 struct elevator_queue *e = hctx->queue->elevator;
117
118 if (e && e->type->ops.mq.has_work)
119 return e->type->ops.mq.has_work(hctx);
120
121 return false;
122}
123
124static inline void blk_mq_sched_mark_restart(struct blk_mq_hw_ctx *hctx)
125{
Jens Axboe50e1dab2017-01-26 14:42:34 -0700[diff] [blame]126 if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) {
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]127 set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
Jens Axboe50e1dab2017-01-26 14:42:34 -0700[diff] [blame]128 if (hctx->flags & BLK_MQ_F_TAG_SHARED) {
129 struct request_queue *q = hctx->queue;
130
131 if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags))
132 set_bit(QUEUE_FLAG_RESTART, &q->queue_flags);
133 }
134 }
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]135}
136
137static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
138{
139 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
140}
141
142#endif