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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / refs/heads/master / . / block / blk-mq-sched.h
blob: 0250139724539a9411fa50d6b483bda1b0410377 [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
Christoph Hellwig2e9bc342021-09-20 14:33:23 +0200[diff] [blame]5#include "elevator.h"
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]6#include "blk-mq.h"
7#include "blk-mq-tag.h"
8
John Garryd2a27962021-10-05 18:23:27 +0800[diff] [blame]9#define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ)
John Garryd97e5942021-05-13 20:00:58 +0800[diff] [blame]10
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);
Pavel Begunkov179ae84f2021-10-20 20:00:49 +0100[diff] [blame]13bool blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]14 unsigned int nr_segs);
Jan Karafd2ef392021-06-23 11:36:34 +0200[diff] [blame]15bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq,
16 struct list_head *free);
Damien Le Moal7211aef82018-12-17 15:14:05 +0900[diff] [blame]17void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
Pavel Begunkove9ea1592021-10-09 13:25:42 +0100[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 Axboe67cae4c2018-10-30 11:31:51 -0600[diff] [blame]22void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]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);
John Garry1820f4f2021-10-05 18:23:31 +0800[diff] [blame]30void blk_mq_sched_free_rqs(struct request_queue *q);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]31
Pavel Begunkove9ea1592021-10-09 13:25:42 +0100[diff] [blame]32static inline void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
33{
34 if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
35 __blk_mq_sched_restart(hctx);
36}
37
Christoph Hellwig8addffd2021-10-12 18:17:59 +0200[diff] [blame]38static inline bool bio_mergeable(struct bio *bio)
39{
40 return !(bio->bi_opf & REQ_NOMERGE_FLAGS);
41}
42
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]43static inline bool
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]44blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
45 struct bio *bio)
46{
Jens Axboe2ff06822021-10-15 09:44:38 -0600[diff] [blame]47 if (rq->rq_flags & RQF_ELV) {
48 struct elevator_queue *e = q->elevator;
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]49
Jens Axboe2ff06822021-10-15 09:44:38 -0600[diff] [blame]50 if (e->type->ops.allow_merge)
51 return e->type->ops.allow_merge(q, rq, bio);
52 }
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]53 return true;
54}
55
Omar Sandovaled886602018-09-27 15:55:51 -0700[diff] [blame]56static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]57{
Jens Axboe2ff06822021-10-15 09:44:38 -0600[diff] [blame]58 if (rq->rq_flags & RQF_ELV) {
59 struct elevator_queue *e = rq->q->elevator;
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]60
Jens Axboe2ff06822021-10-15 09:44:38 -0600[diff] [blame]61 if (e->type->ops.completed_request)
62 e->type->ops.completed_request(rq, now);
63 }
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]64}
65
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]66static inline void blk_mq_sched_requeue_request(struct request *rq)
67{
Jens Axboe2ff06822021-10-15 09:44:38 -0600[diff] [blame]68 if (rq->rq_flags & RQF_ELV) {
69 struct request_queue *q = rq->q;
70 struct elevator_queue *e = q->elevator;
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]71
Jens Axboe2ff06822021-10-15 09:44:38 -0600[diff] [blame]72 if ((rq->rq_flags & RQF_ELVPRIV) && e->type->ops.requeue_request)
73 e->type->ops.requeue_request(rq);
74 }
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]75}
76
77static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
78{
79 struct elevator_queue *e = hctx->queue->elevator;
80
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]81 if (e && e->type->ops.has_work)
82 return e->type->ops.has_work(hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]83
84 return false;
85}
86
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]87static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
88{
89 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
90}
91
92#endif