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gerrit-public.fairphone.software / kernel / msm-4.19 / 6ab025ed444cfd1f6cc93c05a977550ce82c8ea1 / . / block / blk-mq-sched.h
blob: 0cb8f938dff9d6a9b2fd3f6b519790c6f9f7b805 [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,
Mike Snitzer9e97d292018-01-17 11:25:58 -0500[diff] [blame]21 bool run_queue, bool async);
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]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 Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]36static inline bool
37blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
38{
Ming Lei9bddeb22017-05-26 19:53:20 +0800[diff] [blame]39 if (blk_queue_nomerges(q) || !bio_mergeable(bio))
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]40 return false;
41
42 return __blk_mq_sched_bio_merge(q, bio);
43}
44
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]45static inline bool
46blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
47 struct bio *bio)
48{
49 struct elevator_queue *e = q->elevator;
50
51 if (e && e->type->ops.mq.allow_merge)
52 return e->type->ops.mq.allow_merge(q, rq, bio);
53
54 return true;
55}
56
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]57static inline void blk_mq_sched_completed_request(struct request *rq)
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]58{
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]59 struct elevator_queue *e = rq->q->elevator;
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]60
61 if (e && e->type->ops.mq.completed_request)
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]62 e->type->ops.mq.completed_request(rq);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]63}
64
65static inline void blk_mq_sched_started_request(struct request *rq)
66{
67 struct request_queue *q = rq->q;
68 struct elevator_queue *e = q->elevator;
69
70 if (e && e->type->ops.mq.started_request)
71 e->type->ops.mq.started_request(rq);
72}
73
74static inline void blk_mq_sched_requeue_request(struct request *rq)
75{
76 struct request_queue *q = rq->q;
77 struct elevator_queue *e = q->elevator;
78
79 if (e && e->type->ops.mq.requeue_request)
80 e->type->ops.mq.requeue_request(rq);
81}
82
83static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
84{
85 struct elevator_queue *e = hctx->queue->elevator;
86
87 if (e && e->type->ops.mq.has_work)
88 return e->type->ops.mq.has_work(hctx);
89
90 return false;
91}
92
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]93static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
94{
95 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
96}
97
98#endif