[linux-2.6-block.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"

void blk_mq_sched_free_hctx_data(struct request_queue *q,
				 void (*exit)(struct blk_mq_hw_ctx *));

void blk_mq_sched_assign_ioc(struct request *rq);

void blk_mq_sched_request_inserted(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);
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 (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
bd166ef1 JA	8	void blk_mq_sched_free_hctx_data(struct request_queue *q,
	9	void (exit)(struct blk_mq_hw_ctx ));
	10
e2b3fa5a	11	void blk_mq_sched_assign_ioc(struct request *rq);
bd166ef1 JA	12
bd166ef1 JA	13	void blk_mq_sched_request_inserted(struct request *rq);
e4d750c9	14	bool blk_mq_sched_try_merge(struct request_queue q, struct bio bio,
14ccb66b CH	15	unsigned int nr_segs, struct request **merged_request);
	16	bool __blk_mq_sched_bio_merge(struct request_queue q, struct bio bio,
	17	unsigned int nr_segs);
bd166ef1	18	bool blk_mq_sched_try_insert_merge(struct request_queue q, struct request rq);
7211aef8	19	void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
6d8c6c0f	20	void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
bd166ef1	21
bd6737f1	22	void blk_mq_sched_insert_request(struct request *rq, bool at_head,
9e97d295	23	bool run_queue, bool async);
67cae4c9	24	void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
bd6737f1 JA	25	struct blk_mq_ctx *ctx,
	26	struct list_head *list, bool run_queue_async);
	27
bd166ef1	28	void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
bd166ef1	29
6917ff0b	30	int blk_mq_init_sched(struct request_queue q, struct elevator_type e);
54d5329d	31	void blk_mq_exit_sched(struct request_queue q, struct elevator_queue e);
c3e22192	32	void blk_mq_sched_free_requests(struct request_queue *q);
bd166ef1 JA	33
bd166ef1 JA	34	static inline bool
14ccb66b CH	35	blk_mq_sched_bio_merge(struct request_queue q, struct bio bio,
14ccb66b CH	36	unsigned int nr_segs)
bd166ef1	37	{
9bddeb2a	38	if (blk_queue_nomerges(q) \|\| !bio_mergeable(bio))
bd166ef1 JA	39	return false;
bd166ef1 JA	40
14ccb66b	41	return __blk_mq_sched_bio_merge(q, bio, nr_segs);
bd166ef1 JA	42	}
bd166ef1 JA	43
bd166ef1 JA	44	static inline bool
	45	blk_mq_sched_allow_merge(struct request_queue q, struct request rq,
	46	struct bio *bio)
	47	{
	48	struct elevator_queue *e = q->elevator;
	49
f9cd4bfe JA	50	if (e && e->type->ops.allow_merge)
f9cd4bfe JA	51	return e->type->ops.allow_merge(q, rq, bio);
bd166ef1 JA	52
	53	return true;
	54	}
	55
ed88660a	56	static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
bd166ef1	57	{
c05f8525	58	struct elevator_queue *e = rq->q->elevator;
bd166ef1	59
f9cd4bfe JA	60	if (e && e->type->ops.completed_request)
f9cd4bfe JA	61	e->type->ops.completed_request(rq, now);
bd166ef1 JA	62	}
bd166ef1 JA	63
bd166ef1 JA	64	static 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
f9cd4bfe JA	69	if (e && e->type->ops.requeue_request)
f9cd4bfe JA	70	e->type->ops.requeue_request(rq);
bd166ef1 JA	71	}
	72
	73	static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
	74	{
	75	struct elevator_queue *e = hctx->queue->elevator;
	76
f9cd4bfe JA	77	if (e && e->type->ops.has_work)
f9cd4bfe JA	78	return e->type->ops.has_work(hctx);
bd166ef1 JA	79
	80	return false;
	81	}
	82
bd166ef1 JA	83	static 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