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

#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, struct bio *bio);

void blk_mq_sched_request_inserted(struct request *rq);
bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
				struct request **merged_request);
bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
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, bool can_block);
void blk_mq_sched_insert_requests(struct request_queue *q,
				  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);

int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
			   unsigned int hctx_idx);
void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
			    unsigned int hctx_idx);

int blk_mq_sched_init(struct request_queue *q);

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

	return __blk_mq_sched_bio_merge(q, bio);
}

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

	return true;
}

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

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

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.mq.started_request)
		e->type->ops.mq.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.mq.requeue_request)
		e->type->ops.mq.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.mq.has_work)
		return e->type->ops.mq.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
bd166ef1 JA	1	#ifndef BLK_MQ_SCHED_H
	2	#define BLK_MQ_SCHED_H
	3
	4	#include "blk-mq.h"
	5	#include "blk-mq-tag.h"
	6
bd166ef1 JA	7	void blk_mq_sched_free_hctx_data(struct request_queue *q,
	8	void (exit)(struct blk_mq_hw_ctx ));
	9
44e8c2bf	10	void blk_mq_sched_assign_ioc(struct request rq, struct bio bio);
bd166ef1 JA	11
bd166ef1 JA	12	void blk_mq_sched_request_inserted(struct request *rq);
e4d750c9 JA	13	bool blk_mq_sched_try_merge(struct request_queue q, struct bio bio,
e4d750c9 JA	14	struct request **merged_request);
bd166ef1 JA	15	bool __blk_mq_sched_bio_merge(struct request_queue q, struct bio bio);
bd166ef1 JA	16	bool blk_mq_sched_try_insert_merge(struct request_queue q, struct request rq);
6d8c6c0f	17	void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
bd166ef1	18
bd6737f1 JA	19	void blk_mq_sched_insert_request(struct request *rq, bool at_head,
	20	bool run_queue, bool async, bool can_block);
	21	void blk_mq_sched_insert_requests(struct request_queue *q,
	22	struct blk_mq_ctx *ctx,
	23	struct list_head *list, bool run_queue_async);
	24
bd166ef1	25	void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
bd166ef1	26
6917ff0b	27	int blk_mq_init_sched(struct request_queue q, struct elevator_type e);
54d5329d	28	void blk_mq_exit_sched(struct request_queue q, struct elevator_queue e);
bd166ef1	29
93252632 OS	30	int blk_mq_sched_init_hctx(struct request_queue q, struct blk_mq_hw_ctx hctx,
	31	unsigned int hctx_idx);
	32	void blk_mq_sched_exit_hctx(struct request_queue q, struct blk_mq_hw_ctx hctx,
	33	unsigned int hctx_idx);
	34
d3484991 JA	35	int blk_mq_sched_init(struct request_queue *q);
d3484991 JA	36
bd166ef1 JA	37	static inline bool
	38	blk_mq_sched_bio_merge(struct request_queue q, struct bio bio)
	39	{
9bddeb2a	40	if (blk_queue_nomerges(q) \|\| !bio_mergeable(bio))
bd166ef1 JA	41	return false;
	42
	43	return __blk_mq_sched_bio_merge(q, bio);
	44	}
	45
bd166ef1 JA	46	static inline bool
	47	blk_mq_sched_allow_merge(struct request_queue q, struct request rq,
	48	struct bio *bio)
	49	{
	50	struct elevator_queue *e = q->elevator;
	51
	52	if (e && e->type->ops.mq.allow_merge)
	53	return e->type->ops.mq.allow_merge(q, rq, bio);
	54
	55	return true;
	56	}
	57
c05f8525	58	static inline void blk_mq_sched_completed_request(struct request *rq)
bd166ef1	59	{
c05f8525	60	struct elevator_queue *e = rq->q->elevator;
bd166ef1 JA	61
bd166ef1 JA	62	if (e && e->type->ops.mq.completed_request)
c05f8525	63	e->type->ops.mq.completed_request(rq);
bd166ef1 JA	64	}
	65
	66	static inline void blk_mq_sched_started_request(struct request *rq)
	67	{
	68	struct request_queue *q = rq->q;
	69	struct elevator_queue *e = q->elevator;
	70
	71	if (e && e->type->ops.mq.started_request)
	72	e->type->ops.mq.started_request(rq);
	73	}
	74
	75	static inline void blk_mq_sched_requeue_request(struct request *rq)
	76	{
	77	struct request_queue *q = rq->q;
	78	struct elevator_queue *e = q->elevator;
	79
	80	if (e && e->type->ops.mq.requeue_request)
	81	e->type->ops.mq.requeue_request(rq);
	82	}
	83
	84	static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
	85	{
	86	struct elevator_queue *e = hctx->queue->elevator;
	87
	88	if (e && e->type->ops.mq.has_work)
	89	return e->type->ops.mq.has_work(hctx);
	90
	91	return false;
	92	}
	93
bd166ef1 JA	94	static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
	95	{
	96	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
	97	}
	98
	99	#endif