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review.shift-gmbh.com / SHIFTPHONES / kernel / shift / mainline / deeb7d84f20a5b390c1b1bae088170f568958d20 / . / block / blk-mq-sched.h
blob: 0476360f05f18a23c01bfc92c0ba2d891c88ce2e [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
10void blk_mq_sched_request_inserted(struct request *rq);
Jens Axboee4d750c2017-02-03 09:48:28 -0700[diff] [blame]11bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]12 unsigned int nr_segs, struct request **merged_request);
13bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
14 unsigned int nr_segs);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]15bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
Damien Le Moal7211aef82018-12-17 15:14:05 +0900[diff] [blame]16void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
Bart Van Assche6d8c6c02017-04-07 12:40:09 -0600[diff] [blame]17void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]18
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]19void blk_mq_sched_insert_request(struct request *rq, bool at_head,
Mike Snitzer9e97d292018-01-17 11:25:58 -0500[diff] [blame]20 bool run_queue, bool async);
Jens Axboe67cae4c2018-10-30 11:31:51 -0600[diff] [blame]21void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]22 struct blk_mq_ctx *ctx,
23 struct list_head *list, bool run_queue_async);
24
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]25void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]26
Omar Sandoval6917ff02017-04-05 12:01:30 -0700[diff] [blame]27int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
Omar Sandoval54d53292017-04-07 08:52:27 -0600[diff] [blame]28void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
Ming Leic3e22192019-06-04 21:08:02 +0800[diff] [blame]29void blk_mq_sched_free_requests(struct request_queue *q);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]30
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]31static inline bool
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]32blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
33 unsigned int nr_segs)
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]34{
Ming Lei9bddeb22017-05-26 19:53:20 +0800[diff] [blame]35 if (blk_queue_nomerges(q) || !bio_mergeable(bio))
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]36 return false;
37
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]38 return __blk_mq_sched_bio_merge(q, bio, nr_segs);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]39}
40
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]41static inline bool
42blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
43 struct bio *bio)
44{
45 struct elevator_queue *e = q->elevator;
46
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]47 if (e && e->type->ops.allow_merge)
48 return e->type->ops.allow_merge(q, rq, bio);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]49
50 return true;
51}
52
Omar Sandovaled886602018-09-27 15:55:51 -0700[diff] [blame]53static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]54{
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]55 struct elevator_queue *e = rq->q->elevator;
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]56
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]57 if (e && e->type->ops.completed_request)
58 e->type->ops.completed_request(rq, now);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]59}
60
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]61static inline void blk_mq_sched_requeue_request(struct request *rq)
62{
63 struct request_queue *q = rq->q;
64 struct elevator_queue *e = q->elevator;
65
Omar Sandovale8a8a182020-09-08 13:46:37 -0700[diff] [blame]66 if ((rq->rq_flags & RQF_ELVPRIV) && e && e->type->ops.requeue_request)
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]67 e->type->ops.requeue_request(rq);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]68}
69
70static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
71{
72 struct elevator_queue *e = hctx->queue->elevator;
73
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]74 if (e && e->type->ops.has_work)
75 return e->type->ops.has_work(hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]76
77 return false;
78}
79
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]80static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
81{
82 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
83}
84
85#endif