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gerrit-public.fairphone.software / kernel / msm-4.19 / ee38053fcf5d401e8b5c05bd6a40b687a875f02a / . / block / blk-mq-sched.h
blob: 4e028ee4243014ff8eed44627f8e0cc5068217ca [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
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]31static inline bool
32blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
33{
Ming Lei9bddeb22017-05-26 19:53:20 +0800[diff] [blame]34 if (blk_queue_nomerges(q) || !bio_mergeable(bio))
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]35 return false;
36
37 return __blk_mq_sched_bio_merge(q, bio);
38}
39
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]40static inline bool
41blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
42 struct bio *bio)
43{
44 struct elevator_queue *e = q->elevator;
45
46 if (e && e->type->ops.mq.allow_merge)
47 return e->type->ops.mq.allow_merge(q, rq, bio);
48
49 return true;
50}
51
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]52static inline void blk_mq_sched_completed_request(struct request *rq)
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]53{
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]54 struct elevator_queue *e = rq->q->elevator;
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]55
56 if (e && e->type->ops.mq.completed_request)
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]57 e->type->ops.mq.completed_request(rq);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]58}
59
60static inline void blk_mq_sched_started_request(struct request *rq)
61{
62 struct request_queue *q = rq->q;
63 struct elevator_queue *e = q->elevator;
64
65 if (e && e->type->ops.mq.started_request)
66 e->type->ops.mq.started_request(rq);
67}
68
69static inline void blk_mq_sched_requeue_request(struct request *rq)
70{
71 struct request_queue *q = rq->q;
72 struct elevator_queue *e = q->elevator;
73
74 if (e && e->type->ops.mq.requeue_request)
75 e->type->ops.mq.requeue_request(rq);
76}
77
78static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
79{
80 struct elevator_queue *e = hctx->queue->elevator;
81
82 if (e && e->type->ops.mq.has_work)
83 return e->type->ops.mq.has_work(hctx);
84
85 return false;
86}
87
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]88static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
89{
90 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
91}
92
93#endif