[mirror_ubuntu-bionic-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_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)
{
	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;
}

/*
 * 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);
}

/*
 * Mark a hardware queue and the request queue it belongs to as needing a
 * restart.
 */
static inline void blk_mq_sched_mark_restart_queue(struct blk_mq_hw_ctx *hctx)
{
	struct request_queue *q = hctx->queue;

	if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
		set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
	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
6917ff0b	35	int blk_mq_init_sched(struct request_queue q, struct elevator_type e);
54d5329d	36	void blk_mq_exit_sched(struct request_queue q, struct elevator_queue e);
bd166ef1	37
93252632 OS	38	int blk_mq_sched_init_hctx(struct request_queue q, struct blk_mq_hw_ctx hctx,
	39	unsigned int hctx_idx);
	40	void blk_mq_sched_exit_hctx(struct request_queue q, struct blk_mq_hw_ctx hctx,
	41	unsigned int hctx_idx);
	42
d3484991 JA	43	int blk_mq_sched_init(struct request_queue *q);
d3484991 JA	44
bd166ef1 JA	45	static inline bool
	46	blk_mq_sched_bio_merge(struct request_queue q, struct bio bio)
	47	{
	48	struct elevator_queue *e = q->elevator;
	49
	50	if (!e \|\| blk_queue_nomerges(q) \|\| !bio_mergeable(bio))
	51	return false;
	52
	53	return __blk_mq_sched_bio_merge(q, bio);
	54	}
	55
	56	static inline int blk_mq_sched_get_rq_priv(struct request_queue *q,
f1ba8261 PV	57	struct request *rq,
f1ba8261 PV	58	struct bio *bio)
bd166ef1 JA	59	{
	60	struct elevator_queue *e = q->elevator;
	61
	62	if (e && e->type->ops.mq.get_rq_priv)
f1ba8261	63	return e->type->ops.mq.get_rq_priv(q, rq, bio);
bd166ef1 JA	64
	65	return 0;
	66	}
	67
	68	static inline void blk_mq_sched_put_rq_priv(struct request_queue *q,
	69	struct request *rq)
	70	{
	71	struct elevator_queue *e = q->elevator;
	72
	73	if (e && e->type->ops.mq.put_rq_priv)
	74	e->type->ops.mq.put_rq_priv(q, rq);
	75	}
	76
bd166ef1 JA	77	static inline bool
	78	blk_mq_sched_allow_merge(struct request_queue q, struct request rq,
	79	struct bio *bio)
	80	{
	81	struct elevator_queue *e = q->elevator;
	82
	83	if (e && e->type->ops.mq.allow_merge)
	84	return e->type->ops.mq.allow_merge(q, rq, bio);
	85
	86	return true;
	87	}
	88
	89	static inline void
	90	blk_mq_sched_completed_request(struct blk_mq_hw_ctx hctx, struct request rq)
	91	{
	92	struct elevator_queue *e = hctx->queue->elevator;
	93
	94	if (e && e->type->ops.mq.completed_request)
	95	e->type->ops.mq.completed_request(hctx, rq);
	96
	97	BUG_ON(rq->internal_tag == -1);
	98
	99	blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag);
bd166ef1 JA	100	}
	101
	102	static inline void blk_mq_sched_started_request(struct request *rq)
	103	{
	104	struct request_queue *q = rq->q;
	105	struct elevator_queue *e = q->elevator;
	106
	107	if (e && e->type->ops.mq.started_request)
	108	e->type->ops.mq.started_request(rq);
	109	}
	110
	111	static inline void blk_mq_sched_requeue_request(struct request *rq)
	112	{
	113	struct request_queue *q = rq->q;
	114	struct elevator_queue *e = q->elevator;
	115
	116	if (e && e->type->ops.mq.requeue_request)
	117	e->type->ops.mq.requeue_request(rq);
	118	}
	119
	120	static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
	121	{
	122	struct elevator_queue *e = hctx->queue->elevator;
	123
	124	if (e && e->type->ops.mq.has_work)
	125	return e->type->ops.mq.has_work(hctx);
	126
	127	return false;
	128	}
	129
d38d3515 OS	130	/*
	131	* Mark a hardware queue as needing a restart.
	132	*/
	133	static inline void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx)
bd166ef1	134	{
d38d3515	135	if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
bd166ef1	136	set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
d38d3515 OS	137	}
	138
	139	/*
	140	* Mark a hardware queue and the request queue it belongs to as needing a
	141	* restart.
	142	*/
	143	static inline void blk_mq_sched_mark_restart_queue(struct blk_mq_hw_ctx *hctx)
	144	{
	145	struct request_queue *q = hctx->queue;
50e1dab8	146
d38d3515 OS	147	if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
	148	set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
	149	if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags))
	150	set_bit(QUEUE_FLAG_RESTART, &q->queue_flags);
bd166ef1 JA	151	}
	152
	153	static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
	154	{
	155	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
	156	}
	157
	158	#endif