Gitiles
Code Review Sign In
review.shift-gmbh.com / SHIFTPHONES / mainline / linux / fd2ef39cc9a6b9c4c41864ac506906c52f94b06a / . / block / blk-mq-sched.h
blob: 5246ae0407047ebd754a14afdc13a45e5ce11315 [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
John Garryd97e5942021-05-13 20:00:58 +0800[diff] [blame]8#define MAX_SCHED_RQ (16 * BLKDEV_MAX_RQ)
9
Damien Le Moale2b3fa52018-11-20 10:52:34 +0900[diff] [blame]10void blk_mq_sched_assign_ioc(struct request *rq);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]11
Jens Axboee4d750c2017-02-03 09:48:28 -0700[diff] [blame]12bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]13 unsigned int nr_segs, struct request **merged_request);
14bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
15 unsigned int nr_segs);
Jan Karafd2ef392021-06-23 11:36:34 +0200[diff] [blame^]16bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq,
17 struct list_head *free);
Damien Le Moal7211aef82018-12-17 15:14:05 +0900[diff] [blame]18void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
Bart Van Assche6d8c6c02017-04-07 12:40:09 -0600[diff] [blame]19void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]20
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]21void blk_mq_sched_insert_request(struct request *rq, bool at_head,
Mike Snitzer9e97d292018-01-17 11:25:58 -0500[diff] [blame]22 bool run_queue, bool async);
Jens Axboe67cae4c2018-10-30 11:31:51 -0600[diff] [blame]23void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]24 struct blk_mq_ctx *ctx,
25 struct list_head *list, bool run_queue_async);
26
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]27void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]28
Omar Sandoval6917ff02017-04-05 12:01:30 -0700[diff] [blame]29int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
Omar Sandoval54d53292017-04-07 08:52:27 -0600[diff] [blame]30void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
Ming Leic3e22192019-06-04 21:08:02 +0800[diff] [blame]31void blk_mq_sched_free_requests(struct request_queue *q);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]32
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]33static inline bool
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]34blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
35 unsigned int nr_segs)
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]36{
Ming Lei9bddeb22017-05-26 19:53:20 +0800[diff] [blame]37 if (blk_queue_nomerges(q) || !bio_mergeable(bio))
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]38 return false;
39
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]40 return __blk_mq_sched_bio_merge(q, bio, nr_segs);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]41}
42
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]43static inline bool
44blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
45 struct bio *bio)
46{
47 struct elevator_queue *e = q->elevator;
48
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]49 if (e && e->type->ops.allow_merge)
50 return e->type->ops.allow_merge(q, rq, bio);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]51
52 return true;
53}
54
Omar Sandovaled886602018-09-27 15:55:51 -0700[diff] [blame]55static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]56{
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]57 struct elevator_queue *e = rq->q->elevator;
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]58
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]59 if (e && e->type->ops.completed_request)
60 e->type->ops.completed_request(rq, now);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]61}
62
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]63static inline void blk_mq_sched_requeue_request(struct request *rq)
64{
65 struct request_queue *q = rq->q;
66 struct elevator_queue *e = q->elevator;
67
Omar Sandovale8a8a182020-09-08 13:46:37 -0700[diff] [blame]68 if ((rq->rq_flags & RQF_ELVPRIV) && e && e->type->ops.requeue_request)
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]69 e->type->ops.requeue_request(rq);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]70}
71
72static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
73{
74 struct elevator_queue *e = hctx->queue->elevator;
75
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]76 if (e && e->type->ops.has_work)
77 return e->type->ops.has_work(hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]78
79 return false;
80}
81
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]82static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
83{
84 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
85}
86
87#endif