LXR linux/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
   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);
  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_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
  19void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
  20
  21void blk_mq_sched_insert_request(struct request *rq, bool at_head,
  22                                 bool run_queue, bool async);
  23void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
  24                                  struct blk_mq_ctx *ctx,
  25                                  struct list_head *list, bool run_queue_async);
  26
  27void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
  28
  29int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
  30void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
  31void blk_mq_sched_free_requests(struct request_queue *q);
  32
  33static inline bool
  34blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
  35{
  36        if (blk_queue_nomerges(q) || !bio_mergeable(bio))
  37                return false;
  38
  39        return __blk_mq_sched_bio_merge(q, bio);
  40}
  41
  42static inline bool
  43blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
  44                         struct bio *bio)
  45{
  46        struct elevator_queue *e = q->elevator;
  47
  48        if (e && e->type->ops.allow_merge)
  49                return e->type->ops.allow_merge(q, rq, bio);
  50
  51        return true;
  52}
  53
  54static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
  55{
  56        struct elevator_queue *e = rq->q->elevator;
  57
  58        if (e && e->type->ops.completed_request)
  59                e->type->ops.completed_request(rq, now);
  60}
  61
  62static inline void blk_mq_sched_started_request(struct request *rq)
  63{
  64        struct request_queue *q = rq->q;
  65        struct elevator_queue *e = q->elevator;
  66
  67        if (e && e->type->ops.started_request)
  68                e->type->ops.started_request(rq);
  69}
  70
  71static inline void blk_mq_sched_requeue_request(struct request *rq)
  72{
  73        struct request_queue *q = rq->q;
  74        struct elevator_queue *e = q->elevator;
  75
  76        if (e && e->type->ops.requeue_request)
  77                e->type->ops.requeue_request(rq);
  78}
  79
  80static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
  81{
  82        struct elevator_queue *e = hctx->queue->elevator;
  83
  84        if (e && e->type->ops.has_work)
  85                return e->type->ops.has_work(hctx);
  86
  87        return false;
  88}
  89
  90static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
  91{
  92        return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
  93}
  94
  95#endif
  96