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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / bcf5a06304d69a3bb194a494d87b532d5e90b01c / . / block / blk-mq-sched.h
blob: 126021fc3a11f9308a5fe0745ba2a6f9f1ee2ee5 [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
Damien Le Moale2b3fa52018-11-20 10:52:34 +0900[diff] [blame]11void blk_mq_sched_assign_ioc(struct request *rq);
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,
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]15 unsigned int nr_segs, struct request **merged_request);
16bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
17 unsigned int nr_segs);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]18bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
Damien Le Moal7211aef82018-12-17 15:14:05 +0900[diff] [blame]19void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
Bart Van Assche6d8c6c02017-04-07 12:40:09 -0600[diff] [blame]20void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]21
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]22void blk_mq_sched_insert_request(struct request *rq, bool at_head,
Mike Snitzer9e97d292018-01-17 11:25:58 -0500[diff] [blame]23 bool run_queue, bool async);
Jens Axboe67cae4c2018-10-30 11:31:51 -0600[diff] [blame]24void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
Jens Axboebd6737f2017-01-27 01:00:47 -0700[diff] [blame]25 struct blk_mq_ctx *ctx,
26 struct list_head *list, bool run_queue_async);
27
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]28void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]29
Omar Sandoval6917ff02017-04-05 12:01:30 -0700[diff] [blame]30int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
Omar Sandoval54d53292017-04-07 08:52:27 -0600[diff] [blame]31void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
Ming Leic3e22192019-06-04 21:08:02 +0800[diff] [blame]32void blk_mq_sched_free_requests(struct request_queue *q);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]33
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]34static inline bool
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]35blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
36 unsigned int nr_segs)
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]37{
Ming Lei9bddeb22017-05-26 19:53:20 +0800[diff] [blame]38 if (blk_queue_nomerges(q) || !bio_mergeable(bio))
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]39 return false;
40
Christoph Hellwig14ccb662019-06-06 12:29:01 +0200[diff] [blame]41 return __blk_mq_sched_bio_merge(q, bio, nr_segs);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]42}
43
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]44static inline bool
45blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
46 struct bio *bio)
47{
48 struct elevator_queue *e = q->elevator;
49
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]50 if (e && e->type->ops.allow_merge)
51 return e->type->ops.allow_merge(q, rq, bio);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]52
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{
Omar Sandovalc05f8522017-04-14 01:00:01 -0700[diff] [blame]58 struct elevator_queue *e = rq->q->elevator;
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]59
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]60 if (e && e->type->ops.completed_request)
61 e->type->ops.completed_request(rq, now);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]62}
63
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]64static inline void blk_mq_sched_requeue_request(struct request *rq)
65{
66 struct request_queue *q = rq->q;
67 struct elevator_queue *e = q->elevator;
68
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]69 if (e && e->type->ops.requeue_request)
70 e->type->ops.requeue_request(rq);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]71}
72
73static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
74{
75 struct elevator_queue *e = hctx->queue->elevator;
76
Jens Axboef9cd4bf2018-11-01 16:41:41 -0600[diff] [blame]77 if (e && e->type->ops.has_work)
78 return e->type->ops.has_work(hctx);
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]79
80 return false;
81}
82
Jens Axboebd166ef2017-01-17 06:03:22 -0700[diff] [blame]83static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
84{
85 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
86}
87
88#endif