blk-mq: fix two misuses on RQF_USE_SCHED
[linux-block.git] / block / blk-mq-sched.h
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b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
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2#ifndef BLK_MQ_SCHED_H
3#define BLK_MQ_SCHED_H
4
2e9bc346 5#include "elevator.h"
bd166ef1 6#include "blk-mq.h"
bd166ef1 7
d2a27964 8#define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ)
d97e594c 9
e4d750c9 10bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
14ccb66b 11 unsigned int nr_segs, struct request **merged_request);
179ae84f 12bool blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
14ccb66b 13 unsigned int nr_segs);
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14bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq,
15 struct list_head *free);
7211aef8 16void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
e9ea1596 17void __blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
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18
19void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
bd166ef1 20
6917ff0b 21int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
54d5329d 22void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
1820f4f0 23void blk_mq_sched_free_rqs(struct request_queue *q);
bd166ef1 24
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25static inline void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
26{
27 if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
28 __blk_mq_sched_restart(hctx);
29}
30
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31static inline bool bio_mergeable(struct bio *bio)
32{
33 return !(bio->bi_opf & REQ_NOMERGE_FLAGS);
34}
35
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36static inline bool
37blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
38 struct bio *bio)
39{
dd6216bb 40 if (rq->rq_flags & RQF_USE_SCHED) {
2ff0682d 41 struct elevator_queue *e = q->elevator;
bd166ef1 42
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43 if (e->type->ops.allow_merge)
44 return e->type->ops.allow_merge(q, rq, bio);
45 }
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46 return true;
47}
48
ed88660a 49static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
bd166ef1 50{
dd6216bb 51 if (rq->rq_flags & RQF_USE_SCHED) {
2ff0682d 52 struct elevator_queue *e = rq->q->elevator;
bd166ef1 53
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54 if (e->type->ops.completed_request)
55 e->type->ops.completed_request(rq, now);
56 }
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57}
58
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59static inline void blk_mq_sched_requeue_request(struct request *rq)
60{
dd6216bb 61 if (rq->rq_flags & RQF_USE_SCHED) {
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62 struct request_queue *q = rq->q;
63 struct elevator_queue *e = q->elevator;
bd166ef1 64
fdcab6cd 65 if (e->type->ops.requeue_request)
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66 e->type->ops.requeue_request(rq);
67 }
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68}
69
70static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
71{
72 struct elevator_queue *e = hctx->queue->elevator;
73
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74 if (e && e->type->ops.has_work)
75 return e->type->ops.has_work(hctx);
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76
77 return false;
78}
79
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80static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
81{
82 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
83}
84
85#endif