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