Merge tag 'devicetree-fixes-for-6.1-2' of git://git.kernel.org/pub/scm/linux/kernel...
[platform/kernel/linux-starfive.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 "elevator.h"
6 #include "blk-mq.h"
7 #include "blk-mq-tag.h"
8
9 #define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ)
10
11 bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
12                 unsigned int nr_segs, struct request **merged_request);
13 bool blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
14                 unsigned int nr_segs);
15 bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq,
16                                    struct list_head *free);
17 void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
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 blk_mq_hw_ctx *hctx,
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 void blk_mq_sched_free_rqs(struct request_queue *q);
31
32 static inline void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
33 {
34         if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
35                 __blk_mq_sched_restart(hctx);
36 }
37
38 static inline bool bio_mergeable(struct bio *bio)
39 {
40         return !(bio->bi_opf & REQ_NOMERGE_FLAGS);
41 }
42
43 static inline bool
44 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
45                          struct bio *bio)
46 {
47         if (rq->rq_flags & RQF_ELV) {
48                 struct elevator_queue *e = q->elevator;
49
50                 if (e->type->ops.allow_merge)
51                         return e->type->ops.allow_merge(q, rq, bio);
52         }
53         return true;
54 }
55
56 static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
57 {
58         if (rq->rq_flags & RQF_ELV) {
59                 struct elevator_queue *e = rq->q->elevator;
60
61                 if (e->type->ops.completed_request)
62                         e->type->ops.completed_request(rq, now);
63         }
64 }
65
66 static inline void blk_mq_sched_requeue_request(struct request *rq)
67 {
68         if (rq->rq_flags & RQF_ELV) {
69                 struct request_queue *q = rq->q;
70                 struct elevator_queue *e = q->elevator;
71
72                 if ((rq->rq_flags & RQF_ELVPRIV) && e->type->ops.requeue_request)
73                         e->type->ops.requeue_request(rq);
74         }
75 }
76
77 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
78 {
79         struct elevator_queue *e = hctx->queue->elevator;
80
81         if (e && e->type->ops.has_work)
82                 return e->type->ops.has_work(hctx);
83
84         return false;
85 }
86
87 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
88 {
89         return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
90 }
91
92 #endif