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bd166ef1 JA |
1 | #ifndef BLK_MQ_SCHED_H |
2 | #define BLK_MQ_SCHED_H | |
3 | ||
4 | #include "blk-mq.h" | |
5 | #include "blk-mq-tag.h" | |
6 | ||
7 | int blk_mq_sched_init_hctx_data(struct request_queue *q, size_t size, | |
8 | int (*init)(struct blk_mq_hw_ctx *), | |
9 | void (*exit)(struct blk_mq_hw_ctx *)); | |
10 | ||
11 | void blk_mq_sched_free_hctx_data(struct request_queue *q, | |
12 | void (*exit)(struct blk_mq_hw_ctx *)); | |
13 | ||
14 | struct request *blk_mq_sched_get_request(struct request_queue *q, struct bio *bio, unsigned int op, struct blk_mq_alloc_data *data); | |
15 | void blk_mq_sched_put_request(struct request *rq); | |
16 | ||
17 | void blk_mq_sched_request_inserted(struct request *rq); | |
e4d750c9 JA |
18 | bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, |
19 | struct request **merged_request); | |
bd166ef1 JA |
20 | bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio); |
21 | bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq); | |
50e1dab8 | 22 | void blk_mq_sched_restart_queues(struct blk_mq_hw_ctx *hctx); |
bd166ef1 | 23 | |
bd6737f1 JA |
24 | void blk_mq_sched_insert_request(struct request *rq, bool at_head, |
25 | bool run_queue, bool async, bool can_block); | |
26 | void blk_mq_sched_insert_requests(struct request_queue *q, | |
27 | struct blk_mq_ctx *ctx, | |
28 | struct list_head *list, bool run_queue_async); | |
29 | ||
bd166ef1 JA |
30 | void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx); |
31 | void blk_mq_sched_move_to_dispatch(struct blk_mq_hw_ctx *hctx, | |
32 | struct list_head *rq_list, | |
33 | struct request *(*get_rq)(struct blk_mq_hw_ctx *)); | |
34 | ||
35 | int blk_mq_sched_setup(struct request_queue *q); | |
36 | void blk_mq_sched_teardown(struct request_queue *q); | |
37 | ||
d3484991 JA |
38 | int blk_mq_sched_init(struct request_queue *q); |
39 | ||
bd166ef1 JA |
40 | static inline bool |
41 | blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio) | |
42 | { | |
43 | struct elevator_queue *e = q->elevator; | |
44 | ||
45 | if (!e || blk_queue_nomerges(q) || !bio_mergeable(bio)) | |
46 | return false; | |
47 | ||
48 | return __blk_mq_sched_bio_merge(q, bio); | |
49 | } | |
50 | ||
51 | static inline int blk_mq_sched_get_rq_priv(struct request_queue *q, | |
f1ba8261 PV |
52 | struct request *rq, |
53 | struct bio *bio) | |
bd166ef1 JA |
54 | { |
55 | struct elevator_queue *e = q->elevator; | |
56 | ||
57 | if (e && e->type->ops.mq.get_rq_priv) | |
f1ba8261 | 58 | return e->type->ops.mq.get_rq_priv(q, rq, bio); |
bd166ef1 JA |
59 | |
60 | return 0; | |
61 | } | |
62 | ||
63 | static inline void blk_mq_sched_put_rq_priv(struct request_queue *q, | |
64 | struct request *rq) | |
65 | { | |
66 | struct elevator_queue *e = q->elevator; | |
67 | ||
68 | if (e && e->type->ops.mq.put_rq_priv) | |
69 | e->type->ops.mq.put_rq_priv(q, rq); | |
70 | } | |
71 | ||
bd166ef1 JA |
72 | static inline bool |
73 | blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq, | |
74 | struct bio *bio) | |
75 | { | |
76 | struct elevator_queue *e = q->elevator; | |
77 | ||
78 | if (e && e->type->ops.mq.allow_merge) | |
79 | return e->type->ops.mq.allow_merge(q, rq, bio); | |
80 | ||
81 | return true; | |
82 | } | |
83 | ||
84 | static inline void | |
85 | blk_mq_sched_completed_request(struct blk_mq_hw_ctx *hctx, struct request *rq) | |
86 | { | |
87 | struct elevator_queue *e = hctx->queue->elevator; | |
88 | ||
89 | if (e && e->type->ops.mq.completed_request) | |
90 | e->type->ops.mq.completed_request(hctx, rq); | |
91 | ||
92 | BUG_ON(rq->internal_tag == -1); | |
93 | ||
94 | blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag); | |
bd166ef1 JA |
95 | } |
96 | ||
97 | static inline void blk_mq_sched_started_request(struct request *rq) | |
98 | { | |
99 | struct request_queue *q = rq->q; | |
100 | struct elevator_queue *e = q->elevator; | |
101 | ||
102 | if (e && e->type->ops.mq.started_request) | |
103 | e->type->ops.mq.started_request(rq); | |
104 | } | |
105 | ||
106 | static inline void blk_mq_sched_requeue_request(struct request *rq) | |
107 | { | |
108 | struct request_queue *q = rq->q; | |
109 | struct elevator_queue *e = q->elevator; | |
110 | ||
111 | if (e && e->type->ops.mq.requeue_request) | |
112 | e->type->ops.mq.requeue_request(rq); | |
113 | } | |
114 | ||
115 | static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx) | |
116 | { | |
117 | struct elevator_queue *e = hctx->queue->elevator; | |
118 | ||
119 | if (e && e->type->ops.mq.has_work) | |
120 | return e->type->ops.mq.has_work(hctx); | |
121 | ||
122 | return false; | |
123 | } | |
124 | ||
d38d3515 OS |
125 | /* |
126 | * Mark a hardware queue as needing a restart. | |
127 | */ | |
128 | static inline void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx) | |
bd166ef1 | 129 | { |
d38d3515 | 130 | if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) |
bd166ef1 | 131 | set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); |
d38d3515 OS |
132 | } |
133 | ||
134 | /* | |
135 | * Mark a hardware queue and the request queue it belongs to as needing a | |
136 | * restart. | |
137 | */ | |
138 | static inline void blk_mq_sched_mark_restart_queue(struct blk_mq_hw_ctx *hctx) | |
139 | { | |
140 | struct request_queue *q = hctx->queue; | |
50e1dab8 | 141 | |
d38d3515 OS |
142 | if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) |
143 | set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); | |
144 | if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags)) | |
145 | set_bit(QUEUE_FLAG_RESTART, &q->queue_flags); | |
bd166ef1 JA |
146 | } |
147 | ||
148 | static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx) | |
149 | { | |
150 | return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); | |
151 | } | |
152 | ||
153 | #endif |