linux/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"

#define MAX_SCHED_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_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)
{ … }

static inline bool bio_mergeable(struct bio *bio)
{ … }

static inline bool
blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
			 struct bio *bio)
{ … }

static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
{ … }

static inline void blk_mq_sched_requeue_request(struct request *rq)
{ … }

static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
{ … }

static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
{ … }

#endif