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

#define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_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_rqs(struct request_queue *q);

static inline void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
{
	if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
		__blk_mq_sched_restart(hctx);
}

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
2e9bc346	5	#include "elevator.h"
bd166ef1 JA	6	#include "blk-mq.h"
	7	#include "blk-mq-tag.h"
	8
d2a27964	9	#define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ)
d97e594c	10
e2b3fa5a	11	void blk_mq_sched_assign_ioc(struct request *rq);
bd166ef1	12
e4d750c9	13	bool blk_mq_sched_try_merge(struct request_queue q, struct bio bio,
14ccb66b CH	14	unsigned int nr_segs, struct request **merged_request);
	15	bool __blk_mq_sched_bio_merge(struct request_queue q, struct bio bio,
	16	unsigned int nr_segs);
fd2ef39c JK	17	bool blk_mq_sched_try_insert_merge(struct request_queue q, struct request rq,
fd2ef39c JK	18	struct list_head *free);
7211aef8	19	void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
e9ea1596	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);
1820f4f0	32	void blk_mq_sched_free_rqs(struct request_queue *q);
bd166ef1	33
e9ea1596 PB	34	static inline void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
	35	{
	36	if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
	37	__blk_mq_sched_restart(hctx);
	38	}
	39
bd166ef1	40	static inline bool
14ccb66b CH	41	blk_mq_sched_bio_merge(struct request_queue q, struct bio bio,
14ccb66b CH	42	unsigned int nr_segs)
bd166ef1	43	{
9bddeb2a	44	if (blk_queue_nomerges(q) \|\| !bio_mergeable(bio))
bd166ef1 JA	45	return false;
bd166ef1 JA	46
14ccb66b	47	return __blk_mq_sched_bio_merge(q, bio, nr_segs);
bd166ef1 JA	48	}
bd166ef1 JA	49
bd166ef1 JA	50	static inline bool
	51	blk_mq_sched_allow_merge(struct request_queue q, struct request rq,
	52	struct bio *bio)
	53	{
	54	struct elevator_queue *e = q->elevator;
	55
f9cd4bfe JA	56	if (e && e->type->ops.allow_merge)
f9cd4bfe JA	57	return e->type->ops.allow_merge(q, rq, bio);
bd166ef1 JA	58
	59	return true;
	60	}
	61
ed88660a	62	static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
bd166ef1	63	{
c05f8525	64	struct elevator_queue *e = rq->q->elevator;
bd166ef1	65
f9cd4bfe JA	66	if (e && e->type->ops.completed_request)
f9cd4bfe JA	67	e->type->ops.completed_request(rq, now);
bd166ef1 JA	68	}
bd166ef1 JA	69
bd166ef1 JA	70	static inline void blk_mq_sched_requeue_request(struct request *rq)
	71	{
	72	struct request_queue *q = rq->q;
	73	struct elevator_queue *e = q->elevator;
	74
e8a8a185	75	if ((rq->rq_flags & RQF_ELVPRIV) && e && e->type->ops.requeue_request)
f9cd4bfe	76	e->type->ops.requeue_request(rq);
bd166ef1 JA	77	}
	78
	79	static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
	80	{
	81	struct elevator_queue *e = hctx->queue->elevator;
	82
f9cd4bfe JA	83	if (e && e->type->ops.has_work)
f9cd4bfe JA	84	return e->type->ops.has_work(hctx);
bd166ef1 JA	85
	86	return false;
	87	}
	88
bd166ef1 JA	89	static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
	90	{
	91	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
	92	}
	93
	94	#endif