1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef BLK_MQ_SCHED_H
3*4882a593Smuzhiyun #define BLK_MQ_SCHED_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include "blk-mq.h"
6*4882a593Smuzhiyun #include "blk-mq-tag.h"
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun void blk_mq_sched_assign_ioc(struct request *rq);
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun void blk_mq_sched_request_inserted(struct request *rq);
11*4882a593Smuzhiyun bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
12*4882a593Smuzhiyun unsigned int nr_segs, struct request **merged_request);
13*4882a593Smuzhiyun bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
14*4882a593Smuzhiyun unsigned int nr_segs);
15*4882a593Smuzhiyun bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
16*4882a593Smuzhiyun void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
17*4882a593Smuzhiyun void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun void blk_mq_sched_insert_request(struct request *rq, bool at_head,
20*4882a593Smuzhiyun bool run_queue, bool async);
21*4882a593Smuzhiyun void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
22*4882a593Smuzhiyun struct blk_mq_ctx *ctx,
23*4882a593Smuzhiyun struct list_head *list, bool run_queue_async);
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
28*4882a593Smuzhiyun void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
29*4882a593Smuzhiyun void blk_mq_sched_free_requests(struct request_queue *q);
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun static inline bool
blk_mq_sched_bio_merge(struct request_queue * q,struct bio * bio,unsigned int nr_segs)32*4882a593Smuzhiyun blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
33*4882a593Smuzhiyun unsigned int nr_segs)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun if (blk_queue_nomerges(q) || !bio_mergeable(bio))
36*4882a593Smuzhiyun return false;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun return __blk_mq_sched_bio_merge(q, bio, nr_segs);
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun static inline bool
blk_mq_sched_allow_merge(struct request_queue * q,struct request * rq,struct bio * bio)42*4882a593Smuzhiyun blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
43*4882a593Smuzhiyun struct bio *bio)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun struct elevator_queue *e = q->elevator;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun if (e && e->type->ops.allow_merge)
48*4882a593Smuzhiyun return e->type->ops.allow_merge(q, rq, bio);
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun return true;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
blk_mq_sched_completed_request(struct request * rq,u64 now)53*4882a593Smuzhiyun static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
54*4882a593Smuzhiyun {
55*4882a593Smuzhiyun struct elevator_queue *e = rq->q->elevator;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun if (e && e->type->ops.completed_request)
58*4882a593Smuzhiyun e->type->ops.completed_request(rq, now);
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
blk_mq_sched_requeue_request(struct request * rq)61*4882a593Smuzhiyun static inline void blk_mq_sched_requeue_request(struct request *rq)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun struct request_queue *q = rq->q;
64*4882a593Smuzhiyun struct elevator_queue *e = q->elevator;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun if ((rq->rq_flags & RQF_ELVPRIV) && e && e->type->ops.requeue_request)
67*4882a593Smuzhiyun e->type->ops.requeue_request(rq);
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
blk_mq_sched_has_work(struct blk_mq_hw_ctx * hctx)70*4882a593Smuzhiyun static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
71*4882a593Smuzhiyun {
72*4882a593Smuzhiyun struct elevator_queue *e = hctx->queue->elevator;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun if (e && e->type->ops.has_work)
75*4882a593Smuzhiyun return e->type->ops.has_work(hctx);
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun return false;
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
blk_mq_sched_needs_restart(struct blk_mq_hw_ctx * hctx)80*4882a593Smuzhiyun static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
81*4882a593Smuzhiyun {
82*4882a593Smuzhiyun return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun #endif
86