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1 | #ifndef INT_BLK_MQ_TAG_H |
2 | #define INT_BLK_MQ_TAG_H | |
3 | ||
4 | struct blk_mq_tags; | |
5 | ||
6 | extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags, unsigned int reserved_tags, int node); | |
7 | extern void blk_mq_free_tags(struct blk_mq_tags *tags); | |
8 | ||
9 | extern unsigned int blk_mq_get_tag(struct blk_mq_tags *tags, gfp_t gfp, bool reserved); | |
10 | extern void blk_mq_wait_for_tags(struct blk_mq_tags *tags); | |
11 | extern void blk_mq_put_tag(struct blk_mq_tags *tags, unsigned int tag); | |
12 | extern void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data, unsigned long *), void *data); | |
13 | extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags); | |
14 | extern ssize_t blk_mq_tag_sysfs_show(struct blk_mq_tags *tags, char *page); | |
15 | ||
16 | enum { | |
17 | BLK_MQ_TAG_CACHE_MIN = 1, | |
18 | BLK_MQ_TAG_CACHE_MAX = 64, | |
19 | }; | |
20 | ||
21 | enum { | |
22 | BLK_MQ_TAG_FAIL = -1U, | |
23 | BLK_MQ_TAG_MIN = BLK_MQ_TAG_CACHE_MIN, | |
24 | BLK_MQ_TAG_MAX = BLK_MQ_TAG_FAIL - 1, | |
25 | }; | |
26 | ||
27 | #endif |