Commit | Line | Data |
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320ae51f JA |
1 | #ifndef INT_BLK_MQ_H |
2 | #define INT_BLK_MQ_H | |
3 | ||
24d2f903 CH |
4 | struct blk_mq_tag_set; |
5 | ||
320ae51f JA |
6 | struct blk_mq_ctx { |
7 | struct { | |
8 | spinlock_t lock; | |
9 | struct list_head rq_list; | |
10 | } ____cacheline_aligned_in_smp; | |
11 | ||
12 | unsigned int cpu; | |
13 | unsigned int index_hw; | |
320ae51f | 14 | |
4bb659b1 JA |
15 | unsigned int last_tag ____cacheline_aligned_in_smp; |
16 | ||
320ae51f JA |
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]; | |
23 | ||
24 | struct request_queue *queue; | |
25 | struct kobject kobj; | |
4bb659b1 | 26 | } ____cacheline_aligned_in_smp; |
320ae51f | 27 | |
320ae51f | 28 | void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async); |
780db207 | 29 | void blk_mq_freeze_queue(struct request_queue *q); |
3edcc0ce | 30 | void blk_mq_free_queue(struct request_queue *q); |
e3a2b3f9 | 31 | int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr); |
aed3ea94 | 32 | void blk_mq_wake_waiters(struct request_queue *q); |
320ae51f JA |
33 | |
34 | /* | |
35 | * CPU hotplug helpers | |
36 | */ | |
37 | struct blk_mq_cpu_notifier; | |
38 | void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier, | |
e814e71b | 39 | int (*fn)(void *, unsigned long, unsigned int), |
320ae51f JA |
40 | void *data); |
41 | void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier); | |
42 | void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier); | |
43 | void blk_mq_cpu_init(void); | |
676141e4 JA |
44 | void blk_mq_enable_hotplug(void); |
45 | void blk_mq_disable_hotplug(void); | |
320ae51f JA |
46 | |
47 | /* | |
48 | * CPU -> queue mappings | |
49 | */ | |
24d2f903 | 50 | extern unsigned int *blk_mq_make_queue_map(struct blk_mq_tag_set *set); |
5778322e AM |
51 | extern int blk_mq_update_queue_map(unsigned int *map, unsigned int nr_queues, |
52 | const struct cpumask *online_mask); | |
f14bbe77 | 53 | extern int blk_mq_hw_queue_to_node(unsigned int *map, unsigned int); |
320ae51f | 54 | |
67aec14c JA |
55 | /* |
56 | * sysfs helpers | |
57 | */ | |
58 | extern int blk_mq_sysfs_register(struct request_queue *q); | |
59 | extern void blk_mq_sysfs_unregister(struct request_queue *q); | |
60 | ||
90415837 CH |
61 | extern void blk_mq_rq_timed_out(struct request *req, bool reserved); |
62 | ||
e09aae7e ML |
63 | void blk_mq_release(struct request_queue *q); |
64 | ||
e93ecf60 JA |
65 | /* |
66 | * Basic implementation of sparser bitmap, allowing the user to spread | |
67 | * the bits over more cachelines. | |
68 | */ | |
69 | struct blk_align_bitmap { | |
70 | unsigned long word; | |
71 | unsigned long depth; | |
72 | } ____cacheline_aligned_in_smp; | |
73 | ||
1aecfe48 ML |
74 | static inline struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q, |
75 | unsigned int cpu) | |
76 | { | |
77 | return per_cpu_ptr(q->queue_ctx, cpu); | |
78 | } | |
79 | ||
80 | /* | |
81 | * This assumes per-cpu software queueing queues. They could be per-node | |
82 | * as well, for instance. For now this is hardcoded as-is. Note that we don't | |
83 | * care about preemption, since we know the ctx's are persistent. This does | |
84 | * mean that we can't rely on ctx always matching the currently running CPU. | |
85 | */ | |
86 | static inline struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q) | |
87 | { | |
88 | return __blk_mq_get_ctx(q, get_cpu()); | |
89 | } | |
90 | ||
91 | static inline void blk_mq_put_ctx(struct blk_mq_ctx *ctx) | |
92 | { | |
93 | put_cpu(); | |
94 | } | |
95 | ||
cb96a42c ML |
96 | struct blk_mq_alloc_data { |
97 | /* input parameter */ | |
98 | struct request_queue *q; | |
6f3b0e8b | 99 | unsigned int flags; |
cb96a42c ML |
100 | |
101 | /* input & output parameter */ | |
102 | struct blk_mq_ctx *ctx; | |
103 | struct blk_mq_hw_ctx *hctx; | |
104 | }; | |
105 | ||
106 | static inline void blk_mq_set_alloc_data(struct blk_mq_alloc_data *data, | |
6f3b0e8b CH |
107 | struct request_queue *q, unsigned int flags, |
108 | struct blk_mq_ctx *ctx, struct blk_mq_hw_ctx *hctx) | |
cb96a42c ML |
109 | { |
110 | data->q = q; | |
6f3b0e8b | 111 | data->flags = flags; |
cb96a42c ML |
112 | data->ctx = ctx; |
113 | data->hctx = hctx; | |
114 | } | |
115 | ||
19c66e59 ML |
116 | static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx *hctx) |
117 | { | |
118 | return hctx->nr_ctx && hctx->tags; | |
119 | } | |
120 | ||
320ae51f | 121 | #endif |