1#ifndef INT_BLK_MQ_TAG_H 2#define INT_BLK_MQ_TAG_H 3 4struct blk_mq_tags; 5 6extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags, unsigned int reserved_tags, int node); 7extern void blk_mq_free_tags(struct blk_mq_tags *tags); 8 9extern unsigned int blk_mq_get_tag(struct blk_mq_tags *tags, gfp_t gfp, bool reserved); 10extern void blk_mq_wait_for_tags(struct blk_mq_tags *tags); 11extern void blk_mq_put_tag(struct blk_mq_tags *tags, unsigned int tag); 12extern void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data, unsigned long *), void *data); 13extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags); 14extern ssize_t blk_mq_tag_sysfs_show(struct blk_mq_tags *tags, char *page); 15 16enum { 17 BLK_MQ_TAG_CACHE_MIN = 1, 18 BLK_MQ_TAG_CACHE_MAX = 64, 19}; 20 21enum { 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 28