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 int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
  32                            unsigned int hctx_idx);
  33 void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
  34                             unsigned int hctx_idx);
  35
  36 int blk_mq_sched_init(struct request_queue *q);
  37
  38 static inline bool
  39 blk_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
  47 static inline bool
  48 blk_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
  59 static 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
  67 static 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
  76 static 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
  85 static 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
  95 static 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