[mirror_ubuntu-jammy-kernel.git] / block / blk-mq-sched.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BLK_MQ_SCHED_H
#define BLK_MQ_SCHED_H

#include "blk-mq.h"
#include "blk-mq-tag.h"

#define MAX_SCHED_RQ (16 * BLKDEV_MAX_RQ)

void blk_mq_sched_assign_ioc(struct request *rq);

bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
		unsigned int nr_segs, struct request **merged_request);
bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
		unsigned int nr_segs);
bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq,
				   struct list_head *free);
void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);

void blk_mq_sched_insert_request(struct request *rq, bool at_head,
				 bool run_queue, bool async);
void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
				  struct blk_mq_ctx *ctx,
				  struct list_head *list, bool run_queue_async);

void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);

int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
void blk_mq_sched_free_requests(struct request_queue *q);

static inline bool
blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
		unsigned int nr_segs)
{
	if (blk_queue_nomerges(q) || !bio_mergeable(bio))
		return false;

	return __blk_mq_sched_bio_merge(q, bio, nr_segs);
}

static inline bool
blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
			 struct bio *bio)
{
	struct elevator_queue *e = q->elevator;

	if (e && e->type->ops.allow_merge)
		return e->type->ops.allow_merge(q, rq, bio);

	return true;
}

static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
{
	struct elevator_queue *e = rq->q->elevator;

	if (e && e->type->ops.completed_request)
		e->type->ops.completed_request(rq, now);
}

static inline void blk_mq_sched_requeue_request(struct request *rq)
{
	struct request_queue *q = rq->q;
	struct elevator_queue *e = q->elevator;

	if ((rq->rq_flags & RQF_ELVPRIV) && e && e->type->ops.requeue_request)
		e->type->ops.requeue_request(rq);
}

static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
{
	struct elevator_queue *e = hctx->queue->elevator;

	if (e && e->type->ops.has_work)
		return e->type->ops.has_work(hctx);

	return false;
}

static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
{
	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
}

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
bd166ef1 JA	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
d97e594c JG	8	#define MAX_SCHED_RQ (16 * BLKDEV_MAX_RQ)
d97e594c JG	9
e2b3fa5a	10	void blk_mq_sched_assign_ioc(struct request *rq);
bd166ef1	11
e4d750c9	12	bool blk_mq_sched_try_merge(struct request_queue q, struct bio bio,
14ccb66b CH	13	unsigned int nr_segs, struct request **merged_request);
	14	bool __blk_mq_sched_bio_merge(struct request_queue q, struct bio bio,
	15	unsigned int nr_segs);
fd2ef39c JK	16	bool blk_mq_sched_try_insert_merge(struct request_queue q, struct request rq,
fd2ef39c JK	17	struct list_head *free);
7211aef8	18	void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
6d8c6c0f	19	void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
bd166ef1	20
bd6737f1	21	void blk_mq_sched_insert_request(struct request *rq, bool at_head,
9e97d295	22	bool run_queue, bool async);
67cae4c9	23	void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
bd6737f1 JA	24	struct blk_mq_ctx *ctx,
	25	struct list_head *list, bool run_queue_async);
	26
bd166ef1	27	void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
bd166ef1	28
6917ff0b	29	int blk_mq_init_sched(struct request_queue q, struct elevator_type e);
54d5329d	30	void blk_mq_exit_sched(struct request_queue q, struct elevator_queue e);
c3e22192	31	void blk_mq_sched_free_requests(struct request_queue *q);
bd166ef1 JA	32
bd166ef1 JA	33	static inline bool
14ccb66b CH	34	blk_mq_sched_bio_merge(struct request_queue q, struct bio bio,
14ccb66b CH	35	unsigned int nr_segs)
bd166ef1	36	{
9bddeb2a	37	if (blk_queue_nomerges(q) \|\| !bio_mergeable(bio))
bd166ef1 JA	38	return false;
bd166ef1 JA	39
14ccb66b	40	return __blk_mq_sched_bio_merge(q, bio, nr_segs);
bd166ef1 JA	41	}
bd166ef1 JA	42
bd166ef1 JA	43	static inline bool
	44	blk_mq_sched_allow_merge(struct request_queue q, struct request rq,
	45	struct bio *bio)
	46	{
	47	struct elevator_queue *e = q->elevator;
	48
f9cd4bfe JA	49	if (e && e->type->ops.allow_merge)
f9cd4bfe JA	50	return e->type->ops.allow_merge(q, rq, bio);
bd166ef1 JA	51
	52	return true;
	53	}
	54
ed88660a	55	static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
bd166ef1	56	{
c05f8525	57	struct elevator_queue *e = rq->q->elevator;
bd166ef1	58
f9cd4bfe JA	59	if (e && e->type->ops.completed_request)
f9cd4bfe JA	60	e->type->ops.completed_request(rq, now);
bd166ef1 JA	61	}
bd166ef1 JA	62
bd166ef1 JA	63	static 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
e8a8a185	68	if ((rq->rq_flags & RQF_ELVPRIV) && e && e->type->ops.requeue_request)
f9cd4bfe	69	e->type->ops.requeue_request(rq);
bd166ef1 JA	70	}
	71
	72	static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
	73	{
	74	struct elevator_queue *e = hctx->queue->elevator;
	75
f9cd4bfe JA	76	if (e && e->type->ops.has_work)
f9cd4bfe JA	77	return e->type->ops.has_work(hctx);
bd166ef1 JA	78
	79	return false;
	80	}
	81
bd166ef1 JA	82	static 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