[linux-block.git] / block / blk-mq-sched.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BLK_MQ_SCHED_H
#define BLK_MQ_SCHED_H

#include "elevator.h"
#include "blk-mq.h"
#include "blk-mq-tag.h"

#define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ)

bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
		unsigned int nr_segs, struct request **merged_request);
bool blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
		unsigned int nr_segs);
bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq,
				   struct list_head *free);
void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
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);
void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
				  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);
void blk_mq_sched_free_rqs(struct request_queue *q);

static inline void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
{
	if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
		__blk_mq_sched_restart(hctx);
}

static inline bool bio_mergeable(struct bio *bio)
{
	return !(bio->bi_opf & REQ_NOMERGE_FLAGS);
}

static inline bool
blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
			 struct bio *bio)
{
	if (rq->rq_flags & RQF_ELV) {
		struct elevator_queue *e = q->elevator;

		if (e->type->ops.allow_merge)
			return e->type->ops.allow_merge(q, rq, bio);
	}
	return true;
}

static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
{
	if (rq->rq_flags & RQF_ELV) {
		struct elevator_queue *e = rq->q->elevator;

		if (e->type->ops.completed_request)
			e->type->ops.completed_request(rq, now);
	}
}

static inline void blk_mq_sched_requeue_request(struct request *rq)
{
	if (rq->rq_flags & RQF_ELV) {
		struct request_queue *q = rq->q;
		struct elevator_queue *e = q->elevator;

		if ((rq->rq_flags & RQF_ELVPRIV) && e->type->ops.requeue_request)
			e->type->ops.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.has_work)
		return e->type->ops.has_work(hctx);

	return false;
}

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
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
bd166ef1 JA	2	#ifndef BLK_MQ_SCHED_H
	3	#define BLK_MQ_SCHED_H
	4
2e9bc346	5	#include "elevator.h"
bd166ef1 JA	6	#include "blk-mq.h"
	7	#include "blk-mq-tag.h"
	8
d2a27964	9	#define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ)
d97e594c	10
e4d750c9	11	bool blk_mq_sched_try_merge(struct request_queue q, struct bio bio,
14ccb66b	12	unsigned int nr_segs, struct request **merged_request);
179ae84f	13	bool blk_mq_sched_bio_merge(struct request_queue q, struct bio bio,
14ccb66b	14	unsigned int nr_segs);
fd2ef39c JK	15	bool blk_mq_sched_try_insert_merge(struct request_queue q, struct request rq,
fd2ef39c JK	16	struct list_head *free);
7211aef8	17	void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
e9ea1596	18	void __blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
bd166ef1	19
bd6737f1	20	void blk_mq_sched_insert_request(struct request *rq, bool at_head,
9e97d295	21	bool run_queue, bool async);
67cae4c9	22	void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
bd6737f1 JA	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);
1820f4f0	30	void blk_mq_sched_free_rqs(struct request_queue *q);
bd166ef1	31
e9ea1596 PB	32	static inline void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
	33	{
	34	if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
	35	__blk_mq_sched_restart(hctx);
	36	}
	37
8addffd6 CH	38	static inline bool bio_mergeable(struct bio *bio)
	39	{
	40	return !(bio->bi_opf & REQ_NOMERGE_FLAGS);
	41	}
	42
bd166ef1 JA	43	static inline bool
	44	blk_mq_sched_allow_merge(struct request_queue q, struct request rq,
	45	struct bio *bio)
	46	{
2ff0682d JA	47	if (rq->rq_flags & RQF_ELV) {
2ff0682d JA	48	struct elevator_queue *e = q->elevator;
bd166ef1	49
2ff0682d JA	50	if (e->type->ops.allow_merge)
	51	return e->type->ops.allow_merge(q, rq, bio);
	52	}
bd166ef1 JA	53	return true;
	54	}
	55
ed88660a	56	static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
bd166ef1	57	{
2ff0682d JA	58	if (rq->rq_flags & RQF_ELV) {
2ff0682d JA	59	struct elevator_queue *e = rq->q->elevator;
bd166ef1	60
2ff0682d JA	61	if (e->type->ops.completed_request)
	62	e->type->ops.completed_request(rq, now);
	63	}
bd166ef1 JA	64	}
bd166ef1 JA	65
bd166ef1 JA	66	static inline void blk_mq_sched_requeue_request(struct request *rq)
bd166ef1 JA	67	{
2ff0682d JA	68	if (rq->rq_flags & RQF_ELV) {
	69	struct request_queue *q = rq->q;
	70	struct elevator_queue *e = q->elevator;
bd166ef1	71
2ff0682d JA	72	if ((rq->rq_flags & RQF_ELVPRIV) && e->type->ops.requeue_request)
	73	e->type->ops.requeue_request(rq);
	74	}
bd166ef1 JA	75	}
	76
	77	static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
	78	{
	79	struct elevator_queue *e = hctx->queue->elevator;
	80
f9cd4bfe JA	81	if (e && e->type->ops.has_work)
f9cd4bfe JA	82	return e->type->ops.has_work(hctx);
bd166ef1 JA	83
	84	return false;
	85	}
	86
bd166ef1 JA	87	static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
	88	{
	89	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
	90	}
	91
	92	#endif