1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef BLK_MQ_SCHED_H
  3#define BLK_MQ_SCHED_H
  4
  5#include "blk-mq.h"
  6#include "blk-mq-tag.h"
  7
  8void blk_mq_sched_free_hctx_data(struct request_queue *q,
  9				 void (*exit)(struct blk_mq_hw_ctx *));
 10
 11void blk_mq_sched_assign_ioc(struct request *rq, struct bio *bio);
 12
 13void blk_mq_sched_request_inserted(struct request *rq);
 14bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
 15				struct request **merged_request);
 16bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
 17bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
 18void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
 19
 20void blk_mq_sched_insert_request(struct request *rq, bool at_head,
 21				 bool run_queue, bool async);
 22void blk_mq_sched_insert_requests(struct request_queue *q,
 23				  struct blk_mq_ctx *ctx,
 24				  struct list_head *list, bool run_queue_async);
 25
 26void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
 27
 28int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
 29void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
 30
 31int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
 32			   unsigned int hctx_idx);
 33void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
 34			    unsigned int hctx_idx);
 35
 36int blk_mq_sched_init(struct request_queue *q);
 37
 38static inline bool
 39blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
 40{
 41	if (blk_queue_nomerges(q) || !bio_mergeable(bio))
 42		return false;
 43
 44	return __blk_mq_sched_bio_merge(q, bio);
 45}
 46
 47static inline bool
 48blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
 49			 struct bio *bio)
 50{
 51	struct elevator_queue *e = q->elevator;
 52
 53	if (e && e->type->ops.mq.allow_merge)
 54		return e->type->ops.mq.allow_merge(q, rq, bio);
 55
 56	return true;
 57}
 58
 59static inline void blk_mq_sched_completed_request(struct request *rq)
 60{
 61	struct elevator_queue *e = rq->q->elevator;
 62
 63	if (e && e->type->ops.mq.completed_request)
 64		e->type->ops.mq.completed_request(rq);
 65}
 66
 67static inline void blk_mq_sched_started_request(struct request *rq)
 68{
 69	struct request_queue *q = rq->q;
 70	struct elevator_queue *e = q->elevator;
 71
 72	if (e && e->type->ops.mq.started_request)
 73		e->type->ops.mq.started_request(rq);
 74}
 75
 76static inline void blk_mq_sched_requeue_request(struct request *rq)
 77{
 78	struct request_queue *q = rq->q;
 79	struct elevator_queue *e = q->elevator;
 80
 81	if (e && e->type->ops.mq.requeue_request)
 82		e->type->ops.mq.requeue_request(rq);
 83}
 84
 85static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
 86{
 87	struct elevator_queue *e = hctx->queue->elevator;
 88
 89	if (e && e->type->ops.mq.has_work)
 90		return e->type->ops.mq.has_work(hctx);
 91
 92	return false;
 93}
 94
 95static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
 96{
 97	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
 98}
 99
100#endif