projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 320ae51f JA |
1 | #ifndef INT_BLK_MQ_TAG_H |
| 2 | #define INT_BLK_MQ_TAG_H | |
| 3 | ||
| 24d2f903 CH |
4 | #include <linux/percpu_ida.h> |
| 5 | ||
| 6 | /* | |
| 7 | * Tag address space map. | |
| 8 | */ | |
| 9 | struct blk_mq_tags { | |
| 10 | unsigned int nr_tags; | |
| 11 | unsigned int nr_reserved_tags; | |
| 12 | unsigned int nr_batch_move; | |
| 13 | unsigned int nr_max_cache; | |
| 14 | ||
| 15 | struct percpu_ida free_tags; | |
| 16 | struct percpu_ida reserved_tags; | |
| 17 | ||
| 18 | struct request **rqs; | |
| 19 | struct list_head page_list; | |
| 20 | }; | |
| 21 | ||
| 320ae51f JA |
22 | |
| 23 | extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags, unsigned int reserved_tags, int node); | |
| 24 | extern void blk_mq_free_tags(struct blk_mq_tags *tags); | |
| 25 | ||
| 26 | extern unsigned int blk_mq_get_tag(struct blk_mq_tags *tags, gfp_t gfp, bool reserved); | |
| 5810d903 | 27 | extern void blk_mq_wait_for_tags(struct blk_mq_tags *tags, bool reserved); |
| 320ae51f JA |
28 | extern void blk_mq_put_tag(struct blk_mq_tags *tags, unsigned int tag); |
| 29 | extern void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data, unsigned long *), void *data); | |
| 30 | extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags); | |
| 31 | extern ssize_t blk_mq_tag_sysfs_show(struct blk_mq_tags *tags, char *page); | |
| 32 | ||
| 33 | enum { | |
| 34 | BLK_MQ_TAG_CACHE_MIN = 1, | |
| 35 | BLK_MQ_TAG_CACHE_MAX = 64, | |
| 36 | }; | |
| 37 | ||
| 38 | enum { | |
| 39 | BLK_MQ_TAG_FAIL = -1U, | |
| 40 | BLK_MQ_TAG_MIN = BLK_MQ_TAG_CACHE_MIN, | |
| 41 | BLK_MQ_TAG_MAX = BLK_MQ_TAG_FAIL - 1, | |
| 42 | }; | |
| 43 | ||
| 44 | #endif |