[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_started_request(struct request *rq)
{
	struct request_queue *q = rq->q;
	struct elevator_queue *e = q->elevator;

	if (e && e->type->ops.started_request)
		e->type->ops.started_request(rq);
}

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
	1	/* SPDX-License-Identifier: GPL-2.0 */
	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
	8	void blk_mq_sched_free_hctx_data(struct request_queue *q,
	9	void (exit)(struct blk_mq_hw_ctx ));
	10
	11	void blk_mq_sched_assign_ioc(struct request *rq);
	12
	13	void blk_mq_sched_request_inserted(struct request *rq);
	14	bool blk_mq_sched_try_merge(struct request_queue q, struct bio bio,
	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);
	18	bool blk_mq_sched_try_insert_merge(struct request_queue q, struct request rq);
	19	void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
	20	void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
	21
	22	void blk_mq_sched_insert_request(struct request *rq, bool at_head,
	23	bool run_queue, bool async);
	24	void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
	25	struct blk_mq_ctx *ctx,
	26	struct list_head *list, bool run_queue_async);
	27
	28	void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
	29
	30	int blk_mq_init_sched(struct request_queue q, struct elevator_type e);
	31	void blk_mq_exit_sched(struct request_queue q, struct elevator_queue e);
	32	void blk_mq_sched_free_requests(struct request_queue *q);
	33
	34	static inline bool
	35	blk_mq_sched_bio_merge(struct request_queue q, struct bio bio,
	36	unsigned int nr_segs)
	37	{
	38	if (blk_queue_nomerges(q) \|\| !bio_mergeable(bio))
	39	return false;
	40
	41	return __blk_mq_sched_bio_merge(q, bio, nr_segs);
	42	}
	43
	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
	50	if (e && e->type->ops.allow_merge)
	51	return e->type->ops.allow_merge(q, rq, bio);
	52
	53	return true;
	54	}
	55
	56	static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
	57	{
	58	struct elevator_queue *e = rq->q->elevator;
	59
	60	if (e && e->type->ops.completed_request)
	61	e->type->ops.completed_request(rq, now);
	62	}
	63
	64	static inline void blk_mq_sched_started_request(struct request *rq)
	65	{
	66	struct request_queue *q = rq->q;
	67	struct elevator_queue *e = q->elevator;
	68
	69	if (e && e->type->ops.started_request)
	70	e->type->ops.started_request(rq);
	71	}
	72
	73	static inline void blk_mq_sched_requeue_request(struct request *rq)
	74	{
	75	struct request_queue *q = rq->q;
	76	struct elevator_queue *e = q->elevator;
	77
	78	if (e && e->type->ops.requeue_request)
	79	e->type->ops.requeue_request(rq);
	80	}
	81
	82	static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
	83	{
	84	struct elevator_queue *e = hctx->queue->elevator;
	85
	86	if (e && e->type->ops.has_work)
	87	return e->type->ops.has_work(hctx);
	88
	89	return false;
	90	}
	91
	92	static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
	93	{
	94	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
	95	}
	96
	97	#endif