5 #include "blk-mq-tag.h"
7 void blk_mq_sched_free_hctx_data(struct request_queue *q,
8 void (*exit)(struct blk_mq_hw_ctx *));
10 struct request *blk_mq_sched_get_request(struct request_queue *q, struct bio *bio, unsigned int op, struct blk_mq_alloc_data *data);
11 void blk_mq_sched_put_request(struct request *rq);
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);
20 void blk_mq_sched_insert_request(struct request *rq, bool at_head,
21 bool run_queue, bool async, bool can_block);
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);
26 void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
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);
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);
36 int blk_mq_sched_init(struct request_queue *q);
39 blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
41 struct elevator_queue *e = q->elevator;
43 if (!e || blk_queue_nomerges(q) || !bio_mergeable(bio))
46 return __blk_mq_sched_bio_merge(q, bio);
49 static inline int blk_mq_sched_get_rq_priv(struct request_queue *q,
53 struct elevator_queue *e = q->elevator;
55 if (e && e->type->ops.mq.get_rq_priv)
56 return e->type->ops.mq.get_rq_priv(q, rq, bio);
61 static inline void blk_mq_sched_put_rq_priv(struct request_queue *q,
64 struct elevator_queue *e = q->elevator;
66 if (e && e->type->ops.mq.put_rq_priv)
67 e->type->ops.mq.put_rq_priv(q, rq);
71 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
74 struct elevator_queue *e = q->elevator;
76 if (e && e->type->ops.mq.allow_merge)
77 return e->type->ops.mq.allow_merge(q, rq, bio);
82 static inline void blk_mq_sched_completed_request(struct request *rq)
84 struct elevator_queue *e = rq->q->elevator;
86 if (e && e->type->ops.mq.completed_request)
87 e->type->ops.mq.completed_request(rq);
90 static inline void blk_mq_sched_started_request(struct request *rq)
92 struct request_queue *q = rq->q;
93 struct elevator_queue *e = q->elevator;
95 if (e && e->type->ops.mq.started_request)
96 e->type->ops.mq.started_request(rq);
99 static inline void blk_mq_sched_requeue_request(struct request *rq)
101 struct request_queue *q = rq->q;
102 struct elevator_queue *e = q->elevator;
104 if (e && e->type->ops.mq.requeue_request)
105 e->type->ops.mq.requeue_request(rq);
108 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
110 struct elevator_queue *e = hctx->queue->elevator;
112 if (e && e->type->ops.mq.has_work)
113 return e->type->ops.mq.has_work(hctx);
119 * Mark a hardware queue as needing a restart.
121 static inline void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx)
123 if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
124 set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
127 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
129 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);