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gerrit-public.fairphone.software / kernel / msm-4.19 / 2dbc644ac62bbcb9ee78e84719953f611be0413d / . / block / blk-mq-sched.h
blob: ba1d1418a96dbbd1a394e07d06f7847b4df2c8fe [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +0100[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0 */
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]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
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]8void blk_mq_sched_free_hctx_data(struct request_queue *q,
9 void (*exit)(struct blk_mq_hw_ctx *));
10
Christoph Hellwig44e8c2b2017-06-16 18:15:25 +0200[diff] [blame]11void blk_mq_sched_assign_ioc(struct request *rq, struct bio *bio);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]12
13void blk_mq_sched_request_inserted(struct request *rq);
Jens Axboee4d750c2017-02-03 09:48:28 -0700[diff] [blame]14bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
15 struct request **merged_request);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]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);
Bart Van Assche6d8c6c02017-04-07 12:40:09 -0600[diff] [blame]18void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]19
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]20void blk_mq_sched_insert_request(struct request *rq, bool at_head,
21 bool run_queue, bool async, bool can_block);
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
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]26void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]27
Omar Sandoval6917ff02017-04-05 12:01:30 -0700[diff] [blame]28int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
Omar Sandoval54d53292017-04-07 08:52:27 -0600[diff] [blame]29void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]30
Omar Sandoval93252632017-04-05 12:01:31 -0700[diff] [blame]31int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
32 unsigned int hctx_idx);
33void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
34 unsigned int hctx_idx);
35
Jens Axboed3484992017-01-13 14:43:58 -0700[diff] [blame]36int blk_mq_sched_init(struct request_queue *q);
37
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]38static inline bool
39blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
40{
Ming Lei9bddeb22017-05-26 19:53:20 +0800[diff] [blame]41 if (blk_queue_nomerges(q) || !bio_mergeable(bio))
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]42 return false;
43
44 return __blk_mq_sched_bio_merge(q, bio);
45}
46
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]47static inline bool
48blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
49 struct bio *bio)
50{
51 struct elevator_queue *e = q->elevator;
52
53 if (e && e->type->ops.mq.allow_merge)
54 return e->type->ops.mq.allow_merge(q, rq, bio);
55
56 return true;
57}
58
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]59static inline void blk_mq_sched_completed_request(struct request *rq)
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]60{
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]61 struct elevator_queue *e = rq->q->elevator;
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]62
63 if (e && e->type->ops.mq.completed_request)
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]64 e->type->ops.mq.completed_request(rq);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]65}
66
67static inline void blk_mq_sched_started_request(struct request *rq)
68{
69 struct request_queue *q = rq->q;
70 struct elevator_queue *e = q->elevator;
71
72 if (e && e->type->ops.mq.started_request)
73 e->type->ops.mq.started_request(rq);
74}
75
76static inline void blk_mq_sched_requeue_request(struct request *rq)
77{
78 struct request_queue *q = rq->q;
79 struct elevator_queue *e = q->elevator;
80
81 if (e && e->type->ops.mq.requeue_request)
82 e->type->ops.mq.requeue_request(rq);
83}
84
85static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
86{
87 struct elevator_queue *e = hctx->queue->elevator;
88
89 if (e && e->type->ops.mq.has_work)
90 return e->type->ops.mq.has_work(hctx);
91
92 return false;
93}
94
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]95static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
96{
97 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
98}
99
100#endif