[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_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);
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,
	52	struct request *rq)
	53	{
	54	struct elevator_queue *e = q->elevator;
	55
	56	if (e && e->type->ops.mq.get_rq_priv)
	57	return e->type->ops.mq.get_rq_priv(q, rq);
	58
	59	return 0;
	60	}
	61
	62	static inline void blk_mq_sched_put_rq_priv(struct request_queue *q,
	63	struct request *rq)
	64	{
	65	struct elevator_queue *e = q->elevator;
	66
	67	if (e && e->type->ops.mq.put_rq_priv)
	68	e->type->ops.mq.put_rq_priv(q, rq);
	69	}
	70
bd166ef1 JA	71	static inline bool
	72	blk_mq_sched_allow_merge(struct request_queue q, struct request rq,
	73	struct bio *bio)
	74	{
	75	struct elevator_queue *e = q->elevator;
	76
	77	if (e && e->type->ops.mq.allow_merge)
	78	return e->type->ops.mq.allow_merge(q, rq, bio);
	79
	80	return true;
	81	}
	82
	83	static inline void
	84	blk_mq_sched_completed_request(struct blk_mq_hw_ctx hctx, struct request rq)
	85	{
	86	struct elevator_queue *e = hctx->queue->elevator;
	87
	88	if (e && e->type->ops.mq.completed_request)
	89	e->type->ops.mq.completed_request(hctx, rq);
	90
	91	BUG_ON(rq->internal_tag == -1);
	92
	93	blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag);
bd166ef1 JA	94	}
	95
	96	static inline void blk_mq_sched_started_request(struct request *rq)
	97	{
	98	struct request_queue *q = rq->q;
	99	struct elevator_queue *e = q->elevator;
	100
	101	if (e && e->type->ops.mq.started_request)
	102	e->type->ops.mq.started_request(rq);
	103	}
	104
	105	static inline void blk_mq_sched_requeue_request(struct request *rq)
	106	{
	107	struct request_queue *q = rq->q;
	108	struct elevator_queue *e = q->elevator;
	109
	110	if (e && e->type->ops.mq.requeue_request)
	111	e->type->ops.mq.requeue_request(rq);
	112	}
	113
	114	static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
	115	{
	116	struct elevator_queue *e = hctx->queue->elevator;
	117
	118	if (e && e->type->ops.mq.has_work)
	119	return e->type->ops.mq.has_work(hctx);
	120
	121	return false;
	122	}
	123
	124	static inline void blk_mq_sched_mark_restart(struct blk_mq_hw_ctx *hctx)
	125	{
50e1dab8	126	if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) {
bd166ef1	127	set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
50e1dab8 JA	128	if (hctx->flags & BLK_MQ_F_TAG_SHARED) {
	129	struct request_queue *q = hctx->queue;
	130
	131	if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags))
	132	set_bit(QUEUE_FLAG_RESTART, &q->queue_flags);
	133	}
	134	}
bd166ef1 JA	135	}
	136
	137	static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
	138	{
	139	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
	140	}
	141
	142	#endif