[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 *));

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(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 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 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;
}

/*
 * Mark a hardware queue as needing a restart.
 */
static inline void blk_mq_sched_mark_restart_hctx(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);
}

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
	10	struct request blk_mq_sched_get_request(struct request_queue q, struct bio bio, unsigned int op, struct blk_mq_alloc_data data);
	11	void blk_mq_sched_put_request(struct request *rq);
	12
	13	void blk_mq_sched_request_inserted(struct request *rq);
e4d750c9 JA	14	bool blk_mq_sched_try_merge(struct request_queue q, struct bio bio,
e4d750c9 JA	15	struct request **merged_request);
bd166ef1 JA	16	bool __blk_mq_sched_bio_merge(struct request_queue q, struct bio bio);
bd166ef1 JA	17	bool blk_mq_sched_try_insert_merge(struct request_queue q, struct request rq);
6d8c6c0f	18	void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
bd166ef1	19
bd6737f1 JA	20	void blk_mq_sched_insert_request(struct request *rq, bool at_head,
	21	bool run_queue, bool async, bool can_block);
	22	void blk_mq_sched_insert_requests(struct request_queue *q,
	23	struct blk_mq_ctx *ctx,
	24	struct list_head *list, bool run_queue_async);
	25
bd166ef1	26	void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
bd166ef1	27
6917ff0b	28	int blk_mq_init_sched(struct request_queue q, struct elevator_type e);
54d5329d	29	void blk_mq_exit_sched(struct request_queue q, struct elevator_queue e);
bd166ef1	30
93252632 OS	31	int blk_mq_sched_init_hctx(struct request_queue q, struct blk_mq_hw_ctx hctx,
	32	unsigned int hctx_idx);
	33	void blk_mq_sched_exit_hctx(struct request_queue q, struct blk_mq_hw_ctx hctx,
	34	unsigned int hctx_idx);
	35
d3484991 JA	36	int blk_mq_sched_init(struct request_queue *q);
d3484991 JA	37
bd166ef1 JA	38	static inline bool
	39	blk_mq_sched_bio_merge(struct request_queue q, struct bio bio)
	40	{
9bddeb2a	41	if (blk_queue_nomerges(q) \|\| !bio_mergeable(bio))
bd166ef1 JA	42	return false;
	43
	44	return __blk_mq_sched_bio_merge(q, bio);
	45	}
	46
	47	static inline int blk_mq_sched_get_rq_priv(struct request_queue *q,
f1ba8261 PV	48	struct request *rq,
f1ba8261 PV	49	struct bio *bio)
bd166ef1 JA	50	{
	51	struct elevator_queue *e = q->elevator;
	52
	53	if (e && e->type->ops.mq.get_rq_priv)
f1ba8261	54	return e->type->ops.mq.get_rq_priv(q, rq, bio);
bd166ef1 JA	55
	56	return 0;
	57	}
	58
	59	static inline void blk_mq_sched_put_rq_priv(struct request_queue *q,
	60	struct request *rq)
	61	{
	62	struct elevator_queue *e = q->elevator;
	63
	64	if (e && e->type->ops.mq.put_rq_priv)
	65	e->type->ops.mq.put_rq_priv(q, rq);
	66	}
	67
bd166ef1 JA	68	static inline bool
	69	blk_mq_sched_allow_merge(struct request_queue q, struct request rq,
	70	struct bio *bio)
	71	{
	72	struct elevator_queue *e = q->elevator;
	73
	74	if (e && e->type->ops.mq.allow_merge)
	75	return e->type->ops.mq.allow_merge(q, rq, bio);
	76
	77	return true;
	78	}
	79
c05f8525	80	static inline void blk_mq_sched_completed_request(struct request *rq)
bd166ef1	81	{
c05f8525	82	struct elevator_queue *e = rq->q->elevator;
bd166ef1 JA	83
bd166ef1 JA	84	if (e && e->type->ops.mq.completed_request)
c05f8525	85	e->type->ops.mq.completed_request(rq);
bd166ef1 JA	86	}
	87
	88	static inline void blk_mq_sched_started_request(struct request *rq)
	89	{
	90	struct request_queue *q = rq->q;
	91	struct elevator_queue *e = q->elevator;
	92
	93	if (e && e->type->ops.mq.started_request)
	94	e->type->ops.mq.started_request(rq);
	95	}
	96
	97	static inline void blk_mq_sched_requeue_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.requeue_request)
	103	e->type->ops.mq.requeue_request(rq);
	104	}
	105
	106	static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
	107	{
	108	struct elevator_queue *e = hctx->queue->elevator;
	109
	110	if (e && e->type->ops.mq.has_work)
	111	return e->type->ops.mq.has_work(hctx);
	112
	113	return false;
	114	}
	115
d38d3515 OS	116	/*
	117	* Mark a hardware queue as needing a restart.
	118	*/
	119	static inline void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx)
bd166ef1	120	{
d38d3515	121	if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
bd166ef1	122	set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
d38d3515 OS	123	}
d38d3515 OS	124
bd166ef1 JA	125	static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
	126	{
	127	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
	128	}
	129
	130	#endif