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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 | ||
6917ff0b | 35 | int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e); |
bd166ef1 JA |
36 | void blk_mq_sched_teardown(struct request_queue *q); |
37 | ||
93252632 OS |
38 | int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx, |
39 | unsigned int hctx_idx); | |
40 | void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx, | |
41 | unsigned int hctx_idx); | |
42 | ||
d3484991 JA |
43 | int blk_mq_sched_init(struct request_queue *q); |
44 | ||
bd166ef1 JA |
45 | static inline bool |
46 | blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio) | |
47 | { | |
48 | struct elevator_queue *e = q->elevator; | |
49 | ||
50 | if (!e || blk_queue_nomerges(q) || !bio_mergeable(bio)) | |
51 | return false; | |
52 | ||
53 | return __blk_mq_sched_bio_merge(q, bio); | |
54 | } | |
55 | ||
56 | static inline int blk_mq_sched_get_rq_priv(struct request_queue *q, | |
f1ba8261 PV |
57 | struct request *rq, |
58 | struct bio *bio) | |
bd166ef1 JA |
59 | { |
60 | struct elevator_queue *e = q->elevator; | |
61 | ||
62 | if (e && e->type->ops.mq.get_rq_priv) | |
f1ba8261 | 63 | return e->type->ops.mq.get_rq_priv(q, rq, bio); |
bd166ef1 JA |
64 | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static inline void blk_mq_sched_put_rq_priv(struct request_queue *q, | |
69 | struct request *rq) | |
70 | { | |
71 | struct elevator_queue *e = q->elevator; | |
72 | ||
73 | if (e && e->type->ops.mq.put_rq_priv) | |
74 | e->type->ops.mq.put_rq_priv(q, rq); | |
75 | } | |
76 | ||
bd166ef1 JA |
77 | static inline bool |
78 | blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq, | |
79 | struct bio *bio) | |
80 | { | |
81 | struct elevator_queue *e = q->elevator; | |
82 | ||
83 | if (e && e->type->ops.mq.allow_merge) | |
84 | return e->type->ops.mq.allow_merge(q, rq, bio); | |
85 | ||
86 | return true; | |
87 | } | |
88 | ||
89 | static inline void | |
90 | blk_mq_sched_completed_request(struct blk_mq_hw_ctx *hctx, struct request *rq) | |
91 | { | |
92 | struct elevator_queue *e = hctx->queue->elevator; | |
93 | ||
94 | if (e && e->type->ops.mq.completed_request) | |
95 | e->type->ops.mq.completed_request(hctx, rq); | |
96 | ||
97 | BUG_ON(rq->internal_tag == -1); | |
98 | ||
99 | blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag); | |
bd166ef1 JA |
100 | } |
101 | ||
102 | static inline void blk_mq_sched_started_request(struct request *rq) | |
103 | { | |
104 | struct request_queue *q = rq->q; | |
105 | struct elevator_queue *e = q->elevator; | |
106 | ||
107 | if (e && e->type->ops.mq.started_request) | |
108 | e->type->ops.mq.started_request(rq); | |
109 | } | |
110 | ||
111 | static inline void blk_mq_sched_requeue_request(struct request *rq) | |
112 | { | |
113 | struct request_queue *q = rq->q; | |
114 | struct elevator_queue *e = q->elevator; | |
115 | ||
116 | if (e && e->type->ops.mq.requeue_request) | |
117 | e->type->ops.mq.requeue_request(rq); | |
118 | } | |
119 | ||
120 | static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx) | |
121 | { | |
122 | struct elevator_queue *e = hctx->queue->elevator; | |
123 | ||
124 | if (e && e->type->ops.mq.has_work) | |
125 | return e->type->ops.mq.has_work(hctx); | |
126 | ||
127 | return false; | |
128 | } | |
129 | ||
d38d3515 OS |
130 | /* |
131 | * Mark a hardware queue as needing a restart. | |
132 | */ | |
133 | static inline void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx) | |
bd166ef1 | 134 | { |
d38d3515 | 135 | if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) |
bd166ef1 | 136 | set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); |
d38d3515 OS |
137 | } |
138 | ||
139 | /* | |
140 | * Mark a hardware queue and the request queue it belongs to as needing a | |
141 | * restart. | |
142 | */ | |
143 | static inline void blk_mq_sched_mark_restart_queue(struct blk_mq_hw_ctx *hctx) | |
144 | { | |
145 | struct request_queue *q = hctx->queue; | |
50e1dab8 | 146 | |
d38d3515 OS |
147 | if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) |
148 | set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); | |
149 | if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags)) | |
150 | set_bit(QUEUE_FLAG_RESTART, &q->queue_flags); | |
bd166ef1 JA |
151 | } |
152 | ||
153 | static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx) | |
154 | { | |
155 | return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); | |
156 | } | |
157 | ||
158 | #endif |