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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / 9bb3fbbff3710dfebeed2f8cf9ee61c415722543 / . / block / blk-mq-sched.h
blob: 5b18ab915c652fad4774216481d07d0567b4d63c [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
Damien Le Moale2b3fa52018-11-20 10:52:34 +0900[diff] [blame]8void blk_mq_sched_assign_ioc(struct request *rq);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]9
Jens Axboee4d750c2017-02-03 09:48:28 -0700[diff] [blame]10bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]11 unsigned int nr_segs, struct request **merged_request);
12bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
13 unsigned int nr_segs);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]14bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
Damien Le Moal7211aef82018-12-17 15:14:05 +0900[diff] [blame]15void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
Bart Van Assche6d8c6c02017-04-07 12:40:09 -0600[diff] [blame]16void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]17
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]18void blk_mq_sched_insert_request(struct request *rq, bool at_head,
Mike Snitzer9e97d292018-01-17 11:25:58 -0500[diff] [blame]19 bool run_queue, bool async);
Jens Axboe67cae4c2018-10-30 11:31:51 -0600[diff] [blame]20void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]21 struct blk_mq_ctx *ctx,
22 struct list_head *list, bool run_queue_async);
23
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]24void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]25
Omar Sandoval6917ff02017-04-05 12:01:30 -0700[diff] [blame]26int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
Omar Sandoval54d53292017-04-07 08:52:27 -0600[diff] [blame]27void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
Ming Leic3e22192019-06-04 21:08:02 +0800[diff] [blame]28void blk_mq_sched_free_requests(struct request_queue *q);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]29
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]30static inline bool
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]31blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
32 unsigned int nr_segs)
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]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
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]37 return __blk_mq_sched_bio_merge(q, bio, nr_segs);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]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
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]46 if (e && e->type->ops.allow_merge)
47 return e->type->ops.allow_merge(q, rq, bio);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]48
49 return true;
50}
51
Omar Sandovaled886602018-09-27 15:55:51 -0700[diff] [blame]52static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
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
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]56 if (e && e->type->ops.completed_request)
57 e->type->ops.completed_request(rq, now);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]58}
59
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]60static inline void blk_mq_sched_requeue_request(struct request *rq)
61{
62 struct request_queue *q = rq->q;
63 struct elevator_queue *e = q->elevator;
64
Omar Sandovale8a8a182020-09-08 13:46:37 -0700[diff] [blame]65 if ((rq->rq_flags & RQF_ELVPRIV) && e && e->type->ops.requeue_request)
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]66 e->type->ops.requeue_request(rq);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]67}
68
69static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
70{
71 struct elevator_queue *e = hctx->queue->elevator;
72
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]73 if (e && e->type->ops.has_work)
74 return e->type->ops.has_work(hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]75
76 return false;
77}
78
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]79static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
80{
81 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
82}
83
84#endif