Commit | Line | Data |
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320ae51f JA |
1 | #ifndef INT_BLK_MQ_H |
2 | #define INT_BLK_MQ_H | |
3 | ||
cf43e6be JA |
4 | #include "blk-stat.h" |
5 | ||
24d2f903 CH |
6 | struct blk_mq_tag_set; |
7 | ||
320ae51f JA |
8 | struct blk_mq_ctx { |
9 | struct { | |
10 | spinlock_t lock; | |
11 | struct list_head rq_list; | |
12 | } ____cacheline_aligned_in_smp; | |
13 | ||
14 | unsigned int cpu; | |
15 | unsigned int index_hw; | |
320ae51f JA |
16 | |
17 | /* incremented at dispatch time */ | |
18 | unsigned long rq_dispatched[2]; | |
19 | unsigned long rq_merged; | |
20 | ||
21 | /* incremented at completion time */ | |
22 | unsigned long ____cacheline_aligned_in_smp rq_completed[2]; | |
cf43e6be | 23 | struct blk_rq_stat stat[2]; |
320ae51f JA |
24 | |
25 | struct request_queue *queue; | |
26 | struct kobject kobj; | |
4bb659b1 | 27 | } ____cacheline_aligned_in_smp; |
320ae51f | 28 | |
320ae51f | 29 | void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async); |
780db207 | 30 | void blk_mq_freeze_queue(struct request_queue *q); |
3edcc0ce | 31 | void blk_mq_free_queue(struct request_queue *q); |
e3a2b3f9 | 32 | int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr); |
aed3ea94 | 33 | void blk_mq_wake_waiters(struct request_queue *q); |
f04c3df3 | 34 | bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *, struct list_head *); |
2c3ad667 JA |
35 | void blk_mq_flush_busy_ctxs(struct blk_mq_hw_ctx *hctx, struct list_head *list); |
36 | ||
37 | /* | |
38 | * Internal helpers for allocating/freeing the request map | |
39 | */ | |
40 | void blk_mq_free_rq_map(struct blk_mq_tag_set *set, struct blk_mq_tags *tags, | |
41 | unsigned int hctx_idx); | |
42 | struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set, | |
43 | unsigned int hctx_idx); | |
44 | ||
45 | /* | |
46 | * Internal helpers for request insertion into sw queues | |
47 | */ | |
48 | void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq, | |
49 | bool at_head); | |
320ae51f JA |
50 | |
51 | /* | |
52 | * CPU hotplug helpers | |
53 | */ | |
676141e4 JA |
54 | void blk_mq_enable_hotplug(void); |
55 | void blk_mq_disable_hotplug(void); | |
320ae51f JA |
56 | |
57 | /* | |
58 | * CPU -> queue mappings | |
59 | */ | |
f14bbe77 | 60 | extern int blk_mq_hw_queue_to_node(unsigned int *map, unsigned int); |
320ae51f | 61 | |
7d7e0f90 CH |
62 | static inline struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *q, |
63 | int cpu) | |
64 | { | |
65 | return q->queue_hw_ctx[q->mq_map[cpu]]; | |
66 | } | |
67 | ||
67aec14c JA |
68 | /* |
69 | * sysfs helpers | |
70 | */ | |
71 | extern int blk_mq_sysfs_register(struct request_queue *q); | |
72 | extern void blk_mq_sysfs_unregister(struct request_queue *q); | |
868f2f0b | 73 | extern void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx); |
67aec14c | 74 | |
90415837 CH |
75 | extern void blk_mq_rq_timed_out(struct request *req, bool reserved); |
76 | ||
e09aae7e ML |
77 | void blk_mq_release(struct request_queue *q); |
78 | ||
1aecfe48 ML |
79 | static inline struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q, |
80 | unsigned int cpu) | |
81 | { | |
82 | return per_cpu_ptr(q->queue_ctx, cpu); | |
83 | } | |
84 | ||
85 | /* | |
86 | * This assumes per-cpu software queueing queues. They could be per-node | |
87 | * as well, for instance. For now this is hardcoded as-is. Note that we don't | |
88 | * care about preemption, since we know the ctx's are persistent. This does | |
89 | * mean that we can't rely on ctx always matching the currently running CPU. | |
90 | */ | |
91 | static inline struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q) | |
92 | { | |
93 | return __blk_mq_get_ctx(q, get_cpu()); | |
94 | } | |
95 | ||
96 | static inline void blk_mq_put_ctx(struct blk_mq_ctx *ctx) | |
97 | { | |
98 | put_cpu(); | |
99 | } | |
100 | ||
cb96a42c ML |
101 | struct blk_mq_alloc_data { |
102 | /* input parameter */ | |
103 | struct request_queue *q; | |
6f3b0e8b | 104 | unsigned int flags; |
cb96a42c ML |
105 | |
106 | /* input & output parameter */ | |
107 | struct blk_mq_ctx *ctx; | |
108 | struct blk_mq_hw_ctx *hctx; | |
109 | }; | |
110 | ||
111 | static inline void blk_mq_set_alloc_data(struct blk_mq_alloc_data *data, | |
6f3b0e8b CH |
112 | struct request_queue *q, unsigned int flags, |
113 | struct blk_mq_ctx *ctx, struct blk_mq_hw_ctx *hctx) | |
cb96a42c ML |
114 | { |
115 | data->q = q; | |
6f3b0e8b | 116 | data->flags = flags; |
cb96a42c ML |
117 | data->ctx = ctx; |
118 | data->hctx = hctx; | |
119 | } | |
120 | ||
2c3ad667 JA |
121 | /* |
122 | * Internal helpers for request allocation/init/free | |
123 | */ | |
124 | void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx, | |
125 | struct request *rq, unsigned int op); | |
126 | void __blk_mq_free_request(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx, | |
127 | struct request *rq); | |
128 | struct request *__blk_mq_alloc_request(struct blk_mq_alloc_data *data, | |
129 | unsigned int op); | |
130 | ||
5d1b25c1 BVA |
131 | static inline bool blk_mq_hctx_stopped(struct blk_mq_hw_ctx *hctx) |
132 | { | |
133 | return test_bit(BLK_MQ_S_STOPPED, &hctx->state); | |
134 | } | |
135 | ||
19c66e59 ML |
136 | static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx *hctx) |
137 | { | |
138 | return hctx->nr_ctx && hctx->tags; | |
139 | } | |
140 | ||
320ae51f | 141 | #endif |