/* SPDX-License-Identifier: GPL-2.0 */

  #ifndef BLK_MQ_SCHED_H
  #define BLK_MQ_SCHED_H
  
  #include "blk-mq.h"
  #include "blk-mq-tag.h"

  void blk_mq_sched_free_hctx_data(struct request_queue *q,
  				 void (*exit)(struct blk_mq_hw_ctx *));

  void blk_mq_sched_assign_ioc(struct request *rq, struct bio *bio);

  
  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(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);

  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);

  int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
  			   unsigned int hctx_idx);
  void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
  			    unsigned int hctx_idx);

  int blk_mq_sched_init(struct request_queue *q);

  static inline bool
  blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
  {

  	if (blk_queue_nomerges(q) || !bio_mergeable(bio))

  		return false;
  
  	return __blk_mq_sched_bio_merge(q, bio);
  }

  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 request *rq)

  {

  	struct elevator_queue *e = rq->q->elevator;

  
  	if (e && e->type->ops.mq.completed_request)

  		e->type->ops.mq.completed_request(rq);

  }
  
  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 bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
  {
  	return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
  }
  
  #endif