block/blk-mq-sched.h

   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
   8 void blk_mq_sched_free_hctx_data(struct request_queue *q,
   9                                  void (*exit)(struct blk_mq_hw_ctx *));
  10
  11 void blk_mq_sched_assign_ioc(struct request *rq, struct bio *bio);
  12
  13 void blk_mq_sched_request_inserted(struct request *rq);
  14 bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
  15                                 struct request **merged_request);
  16 bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
  17 bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
  18 void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
  19
  20 void blk_mq_sched_insert_request(struct request *rq, bool at_head,
  21                                  bool run_queue, bool async);
  22 void 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
  26 void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
  27
  28 int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
  29 void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
  30
  31 static inline bool
  32 blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
  33 {
  34         if (blk_queue_nomerges(q) || !bio_mergeable(bio))
  35                 return false;
  36
  37         return __blk_mq_sched_bio_merge(q, bio);
  38 }
  39
  40 static inline bool
  41 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
  42                          struct bio *bio)
  43 {
  44         struct elevator_queue *e = q->elevator;
  45
  46         if (e && e->type->ops.mq.allow_merge)
  47                 return e->type->ops.mq.allow_merge(q, rq, bio);
  48
  49         return true;
  50 }
  51
  52 static inline void blk_mq_sched_completed_request(struct request *rq)
  53 {
  54         struct elevator_queue *e = rq->q->elevator;
  55
  56         if (e && e->type->ops.mq.completed_request)
  57                 e->type->ops.mq.completed_request(rq);
  58 }
  59
  60 static inline void blk_mq_sched_started_request(struct request *rq)
  61 {
  62         struct request_queue *q = rq->q;
  63         struct elevator_queue *e = q->elevator;
  64
  65         if (e && e->type->ops.mq.started_request)
  66                 e->type->ops.mq.started_request(rq);
  67 }
  68
  69 static inline void blk_mq_sched_requeue_request(struct request *rq)
  70 {
  71         struct request_queue *q = rq->q;
  72         struct elevator_queue *e = q->elevator;
  73
  74         if (e && e->type->ops.mq.requeue_request)
  75                 e->type->ops.mq.requeue_request(rq);
  76 }
  77
  78 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
  79 {
  80         struct elevator_queue *e = hctx->queue->elevator;
  81
  82         if (e && e->type->ops.mq.has_work)
  83                 return e->type->ops.mq.has_work(hctx);
  84
  85         return false;
  86 }
  87
  88 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
  89 {
  90         return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
  91 }
  92
  93 #endif