[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"

int blk_mq_sched_init_hctx_data(struct request_queue *q, size_t size,
				int (*init)(struct blk_mq_hw_ctx *),
				void (*exit)(struct blk_mq_hw_ctx *));

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

struct request *blk_mq_sched_get_request(struct request_queue *q, struct bio *bio, unsigned int op, struct blk_mq_alloc_data *data);
void blk_mq_sched_put_request(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,
				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_queues(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);
void blk_mq_sched_move_to_dispatch(struct blk_mq_hw_ctx *hctx,
			struct list_head *rq_list,
			struct request *(*get_rq)(struct blk_mq_hw_ctx *));

int blk_mq_sched_setup(struct request_queue *q);
void blk_mq_sched_teardown(struct request_queue *q);

int blk_mq_sched_init(struct request_queue *q);

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

	if (!e || blk_queue_nomerges(q) || !bio_mergeable(bio))
		return false;

	return __blk_mq_sched_bio_merge(q, bio);
}

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

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

	return 0;
}

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

	if (e && e->type->ops.mq.put_rq_priv)
		e->type->ops.mq.put_rq_priv(q, rq);
}

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 blk_mq_hw_ctx *hctx, struct request *rq)
{
	struct elevator_queue *e = hctx->queue->elevator;

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

	BUG_ON(rq->internal_tag == -1);

	blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag);
}

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 void blk_mq_sched_mark_restart(struct blk_mq_hw_ctx *hctx)
{
	if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) {
		set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
		if (hctx->flags & BLK_MQ_F_TAG_SHARED) {
			struct request_queue *q = hctx->queue;

			if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags))
				set_bit(QUEUE_FLAG_RESTART, &q->queue_flags);
		}
	}
}

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
	7	int blk_mq_sched_init_hctx_data(struct request_queue *q, size_t size,
	8	int (init)(struct blk_mq_hw_ctx ),
	9	void (exit)(struct blk_mq_hw_ctx ));
	10
	11	void blk_mq_sched_free_hctx_data(struct request_queue *q,
	12	void (exit)(struct blk_mq_hw_ctx ));
	13
	14	struct request blk_mq_sched_get_request(struct request_queue q, struct bio bio, unsigned int op, struct blk_mq_alloc_data data);
	15	void blk_mq_sched_put_request(struct request *rq);
	16
	17	void blk_mq_sched_request_inserted(struct request *rq);
e4d750c9 JA	18	bool blk_mq_sched_try_merge(struct request_queue q, struct bio bio,
e4d750c9 JA	19	struct request **merged_request);
bd166ef1 JA	20	bool __blk_mq_sched_bio_merge(struct request_queue q, struct bio bio);
bd166ef1 JA	21	bool blk_mq_sched_try_insert_merge(struct request_queue q, struct request rq);
50e1dab8	22	void blk_mq_sched_restart_queues(struct blk_mq_hw_ctx *hctx);
bd166ef1	23
bd6737f1 JA	24	void blk_mq_sched_insert_request(struct request *rq, bool at_head,
	25	bool run_queue, bool async, bool can_block);
	26	void blk_mq_sched_insert_requests(struct request_queue *q,
	27	struct blk_mq_ctx *ctx,
	28	struct list_head *list, bool run_queue_async);
	29
bd166ef1 JA	30	void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
	31	void blk_mq_sched_move_to_dispatch(struct blk_mq_hw_ctx *hctx,
	32	struct list_head *rq_list,
	33	struct request (get_rq)(struct blk_mq_hw_ctx *));
	34
	35	int blk_mq_sched_setup(struct request_queue *q);
	36	void blk_mq_sched_teardown(struct request_queue *q);
	37
d3484991 JA	38	int blk_mq_sched_init(struct request_queue *q);
d3484991 JA	39
bd166ef1 JA	40	static inline bool
	41	blk_mq_sched_bio_merge(struct request_queue q, struct bio bio)
	42	{
	43	struct elevator_queue *e = q->elevator;
	44
	45	if (!e \|\| blk_queue_nomerges(q) \|\| !bio_mergeable(bio))
	46	return false;
	47
	48	return __blk_mq_sched_bio_merge(q, bio);
	49	}
	50
	51	static inline int blk_mq_sched_get_rq_priv(struct request_queue *q,
f1ba8261 PV	52	struct request *rq,
f1ba8261 PV	53	struct bio *bio)
bd166ef1 JA	54	{
	55	struct elevator_queue *e = q->elevator;
	56
	57	if (e && e->type->ops.mq.get_rq_priv)
f1ba8261	58	return e->type->ops.mq.get_rq_priv(q, rq, bio);
bd166ef1 JA	59
	60	return 0;
	61	}
	62
	63	static inline void blk_mq_sched_put_rq_priv(struct request_queue *q,
	64	struct request *rq)
	65	{
	66	struct elevator_queue *e = q->elevator;
	67
	68	if (e && e->type->ops.mq.put_rq_priv)
	69	e->type->ops.mq.put_rq_priv(q, rq);
	70	}
	71
bd166ef1 JA	72	static inline bool
	73	blk_mq_sched_allow_merge(struct request_queue q, struct request rq,
	74	struct bio *bio)
	75	{
	76	struct elevator_queue *e = q->elevator;
	77
	78	if (e && e->type->ops.mq.allow_merge)
	79	return e->type->ops.mq.allow_merge(q, rq, bio);
	80
	81	return true;
	82	}
	83
	84	static inline void
	85	blk_mq_sched_completed_request(struct blk_mq_hw_ctx hctx, struct request rq)
	86	{
	87	struct elevator_queue *e = hctx->queue->elevator;
	88
	89	if (e && e->type->ops.mq.completed_request)
	90	e->type->ops.mq.completed_request(hctx, rq);
	91
	92	BUG_ON(rq->internal_tag == -1);
	93
	94	blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag);
bd166ef1 JA	95	}
	96
	97	static inline void blk_mq_sched_started_request(struct request *rq)
	98	{
	99	struct request_queue *q = rq->q;
	100	struct elevator_queue *e = q->elevator;
	101
	102	if (e && e->type->ops.mq.started_request)
	103	e->type->ops.mq.started_request(rq);
	104	}
	105
	106	static inline void blk_mq_sched_requeue_request(struct request *rq)
	107	{
	108	struct request_queue *q = rq->q;
	109	struct elevator_queue *e = q->elevator;
	110
	111	if (e && e->type->ops.mq.requeue_request)
	112	e->type->ops.mq.requeue_request(rq);
	113	}
	114
	115	static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
	116	{
	117	struct elevator_queue *e = hctx->queue->elevator;
	118
	119	if (e && e->type->ops.mq.has_work)
	120	return e->type->ops.mq.has_work(hctx);
	121
	122	return false;
	123	}
	124
	125	static inline void blk_mq_sched_mark_restart(struct blk_mq_hw_ctx *hctx)
	126	{
50e1dab8	127	if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) {
bd166ef1	128	set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
50e1dab8 JA	129	if (hctx->flags & BLK_MQ_F_TAG_SHARED) {
	130	struct request_queue *q = hctx->queue;
	131
	132	if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags))
	133	set_bit(QUEUE_FLAG_RESTART, &q->queue_flags);
	134	}
	135	}
bd166ef1 JA	136	}
	137
	138	static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
	139	{
	140	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
	141	}
	142
	143	#endif