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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / b973cb7e89fe3dcc2bc72c5b3aa7a3bfd9d0e6d5 / . / block / blk-mq-sched.h
blob: add5f090a8cd6907e65f35889ad94bf3d7230a9b [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);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]18bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio);
19bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
20bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
Jens Axboe50e1dab2017-01-26 14:42:34 -0700[diff] [blame]21void blk_mq_sched_restart_queues(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]22
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]23void blk_mq_sched_insert_request(struct request *rq, bool at_head,
24 bool run_queue, bool async, bool can_block);
25void blk_mq_sched_insert_requests(struct request_queue *q,
26 struct blk_mq_ctx *ctx,
27 struct list_head *list, bool run_queue_async);
28
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]29void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
30void blk_mq_sched_move_to_dispatch(struct blk_mq_hw_ctx *hctx,
31 struct list_head *rq_list,
32 struct request *(*get_rq)(struct blk_mq_hw_ctx *));
33
34int blk_mq_sched_setup(struct request_queue *q);
35void blk_mq_sched_teardown(struct request_queue *q);
36
Jens Axboed3484992017-01-13 14:43:58 -0700[diff] [blame]37int blk_mq_sched_init(struct request_queue *q);
38
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]39static inline bool
40blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
41{
42 struct elevator_queue *e = q->elevator;
43
44 if (!e || blk_queue_nomerges(q) || !bio_mergeable(bio))
45 return false;
46
47 return __blk_mq_sched_bio_merge(q, bio);
48}
49
50static inline int blk_mq_sched_get_rq_priv(struct request_queue *q,
51 struct request *rq)
52{
53 struct elevator_queue *e = q->elevator;
54
55 if (e && e->type->ops.mq.get_rq_priv)
56 return e->type->ops.mq.get_rq_priv(q, rq);
57
58 return 0;
59}
60
61static inline void blk_mq_sched_put_rq_priv(struct request_queue *q,
62 struct request *rq)
63{
64 struct elevator_queue *e = q->elevator;
65
66 if (e && e->type->ops.mq.put_rq_priv)
67 e->type->ops.mq.put_rq_priv(q, rq);
68}
69
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]70static inline bool
71blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
72 struct bio *bio)
73{
74 struct elevator_queue *e = q->elevator;
75
76 if (e && e->type->ops.mq.allow_merge)
77 return e->type->ops.mq.allow_merge(q, rq, bio);
78
79 return true;
80}
81
82static inline void
83blk_mq_sched_completed_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
84{
85 struct elevator_queue *e = hctx->queue->elevator;
86
87 if (e && e->type->ops.mq.completed_request)
88 e->type->ops.mq.completed_request(hctx, rq);
89
90 BUG_ON(rq->internal_tag == -1);
91
92 blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]93}
94
95static inline void blk_mq_sched_started_request(struct request *rq)
96{
97 struct request_queue *q = rq->q;
98 struct elevator_queue *e = q->elevator;
99
100 if (e && e->type->ops.mq.started_request)
101 e->type->ops.mq.started_request(rq);
102}
103
104static inline void blk_mq_sched_requeue_request(struct request *rq)
105{
106 struct request_queue *q = rq->q;
107 struct elevator_queue *e = q->elevator;
108
109 if (e && e->type->ops.mq.requeue_request)
110 e->type->ops.mq.requeue_request(rq);
111}
112
113static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
114{
115 struct elevator_queue *e = hctx->queue->elevator;
116
117 if (e && e->type->ops.mq.has_work)
118 return e->type->ops.mq.has_work(hctx);
119
120 return false;
121}
122
123static inline void blk_mq_sched_mark_restart(struct blk_mq_hw_ctx *hctx)
124{
Jens Axboe50e1dab2017-01-26 14:42:34 -0700[diff] [blame]125 if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) {
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]126 set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
Jens Axboe50e1dab2017-01-26 14:42:34 -0700[diff] [blame]127 if (hctx->flags & BLK_MQ_F_TAG_SHARED) {
128 struct request_queue *q = hctx->queue;
129
130 if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags))
131 set_bit(QUEUE_FLAG_RESTART, &q->queue_flags);
132 }
133 }
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]134}
135
136static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
137{
138 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
139}
140
141#endif