[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);
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 elevator_queue *e = q->elevator;

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

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