diff options
Diffstat (limited to 'block/blk-mq-tag.h')
| -rw-r--r-- | block/blk-mq-tag.h | 62 |
1 files changed, 53 insertions, 9 deletions
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h index b602e3fa66ea..c959de58d2a5 100644 --- a/block/blk-mq-tag.h +++ b/block/blk-mq-tag.h @@ -1,7 +1,32 @@ #ifndef INT_BLK_MQ_TAG_H #define INT_BLK_MQ_TAG_H -#include <linux/percpu_ida.h> +#include "blk-mq.h" + +enum { + BT_WAIT_QUEUES = 8, + BT_WAIT_BATCH = 8, +}; + +struct bt_wait_state { + atomic_t wait_cnt; + wait_queue_head_t wait; +} ____cacheline_aligned_in_smp; + +#define TAG_TO_INDEX(bt, tag) ((tag) >> (bt)->bits_per_word) +#define TAG_TO_BIT(bt, tag) ((tag) & ((1 << (bt)->bits_per_word) - 1)) + +struct blk_mq_bitmap_tags { + unsigned int depth; + unsigned int wake_cnt; + unsigned int bits_per_word; + + unsigned int map_nr; + struct blk_align_bitmap *map; + + unsigned int wake_index; + struct bt_wait_state *bs; +}; /* * Tag address space map. @@ -9,11 +34,11 @@ struct blk_mq_tags { unsigned int nr_tags; unsigned int nr_reserved_tags; - unsigned int nr_batch_move; - unsigned int nr_max_cache; - struct percpu_ida free_tags; - struct percpu_ida reserved_tags; + atomic_t active_queues; + + struct blk_mq_bitmap_tags bitmap_tags; + struct blk_mq_bitmap_tags breserved_tags; struct request **rqs; struct list_head page_list; @@ -23,12 +48,12 @@ struct blk_mq_tags { extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags, unsigned int reserved_tags, int node); extern void blk_mq_free_tags(struct blk_mq_tags *tags); -extern unsigned int blk_mq_get_tag(struct blk_mq_tags *tags, gfp_t gfp, bool reserved); -extern void blk_mq_wait_for_tags(struct blk_mq_tags *tags); -extern void blk_mq_put_tag(struct blk_mq_tags *tags, unsigned int tag); -extern void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data, unsigned long *), void *data); +extern unsigned int blk_mq_get_tag(struct blk_mq_hw_ctx *hctx, unsigned int *last_tag, gfp_t gfp, bool reserved); +extern void blk_mq_put_tag(struct blk_mq_hw_ctx *hctx, unsigned int tag, unsigned int *last_tag); extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags); extern ssize_t blk_mq_tag_sysfs_show(struct blk_mq_tags *tags, char *page); +extern void blk_mq_tag_init_last_tag(struct blk_mq_tags *tags, unsigned int *last_tag); +extern int blk_mq_tag_update_depth(struct blk_mq_tags *tags, unsigned int depth); enum { BLK_MQ_TAG_CACHE_MIN = 1, @@ -41,4 +66,23 @@ enum { BLK_MQ_TAG_MAX = BLK_MQ_TAG_FAIL - 1, }; +extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *); +extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *); + +static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx) +{ + if (!(hctx->flags & BLK_MQ_F_TAG_SHARED)) + return false; + + return __blk_mq_tag_busy(hctx); +} + +static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx) +{ + if (!(hctx->flags & BLK_MQ_F_TAG_SHARED)) + return; + + __blk_mq_tag_idle(hctx); +} + #endif |