treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers
[sfrench/cifs-2.6.git] / 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);
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_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
19 void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
20
21 void blk_mq_sched_insert_request(struct request *rq, bool at_head,
22                                  bool run_queue, bool async);
23 void 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
27 void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
28
29 int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
30 void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
31
32 static inline bool
33 blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
34 {
35         if (blk_queue_nomerges(q) || !bio_mergeable(bio))
36                 return false;
37
38         return __blk_mq_sched_bio_merge(q, bio);
39 }
40
41 static inline bool
42 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
43                          struct bio *bio)
44 {
45         struct elevator_queue *e = q->elevator;
46
47         if (e && e->type->ops.allow_merge)
48                 return e->type->ops.allow_merge(q, rq, bio);
49
50         return true;
51 }
52
53 static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
54 {
55         struct elevator_queue *e = rq->q->elevator;
56
57         if (e && e->type->ops.completed_request)
58                 e->type->ops.completed_request(rq, now);
59 }
60
61 static inline void blk_mq_sched_started_request(struct request *rq)
62 {
63         struct request_queue *q = rq->q;
64         struct elevator_queue *e = q->elevator;
65
66         if (e && e->type->ops.started_request)
67                 e->type->ops.started_request(rq);
68 }
69
70 static inline void blk_mq_sched_requeue_request(struct request *rq)
71 {
72         struct request_queue *q = rq->q;
73         struct elevator_queue *e = q->elevator;
74
75         if (e && e->type->ops.requeue_request)
76                 e->type->ops.requeue_request(rq);
77 }
78
79 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
80 {
81         struct elevator_queue *e = hctx->queue->elevator;
82
83         if (e && e->type->ops.has_work)
84                 return e->type->ops.has_work(hctx);
85
86         return false;
87 }
88
89 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
90 {
91         return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
92 }
93
94 #endif