projects / thirdparty / kernel / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 320ae51f JA |
2 | #ifndef INT_BLK_MQ_TAG_H |
| 3 | #define INT_BLK_MQ_TAG_H | |
| 4 | ||
| 24d2f903 CH |
5 | /* |
| 6 | * Tag address space map. | |
| 7 | */ | |
| 8 | struct blk_mq_tags { | |
| 9 | unsigned int nr_tags; | |
| 10 | unsigned int nr_reserved_tags; | |
| 24d2f903 | 11 | |
| 0d2602ca JA |
12 | atomic_t active_queues; |
| 13 | ||
| 222a5ae0 JG |
14 | struct sbitmap_queue *bitmap_tags; |
| 15 | struct sbitmap_queue *breserved_tags; | |
| 16 | ||
| 17 | struct sbitmap_queue __bitmap_tags; | |
| 18 | struct sbitmap_queue __breserved_tags; | |
| 24d2f903 CH |
19 | |
| 20 | struct request **rqs; | |
| 2af8cbe3 | 21 | struct request **static_rqs; |
| 24d2f903 CH |
22 | struct list_head page_list; |
| 23 | }; | |
| 24 | ||
| 1c0706a7 JG |
25 | extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags, |
| 26 | unsigned int reserved_tags, | |
| 27 | int node, unsigned int flags); | |
| 28 | extern void blk_mq_free_tags(struct blk_mq_tags *tags, unsigned int flags); | |
| 320ae51f | 29 | |
| 32bc15af JG |
30 | extern int blk_mq_init_shared_sbitmap(struct blk_mq_tag_set *set, |
| 31 | unsigned int flags); | |
| 32 | extern void blk_mq_exit_shared_sbitmap(struct blk_mq_tag_set *set); | |
| 33 | ||
| cb96a42c | 34 | extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data); |
| cae740a0 JG |
35 | extern void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx, |
| 36 | unsigned int tag); | |
| 70f36b60 JA |
37 | extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx, |
| 38 | struct blk_mq_tags **tags, | |
| 39 | unsigned int depth, bool can_grow); | |
| 32bc15af JG |
40 | extern void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set, |
| 41 | unsigned int size); | |
| 42 | ||
| aed3ea94 | 43 | extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool); |
| 0bf6cd5b CH |
44 | void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn, |
| 45 | void *priv); | |
| 602380d2 ML |
46 | void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn, |
| 47 | void *priv); | |
| 320ae51f | 48 | |
| 88459642 OS |
49 | static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt, |
| 50 | struct blk_mq_hw_ctx *hctx) | |
| 51 | { | |
| 52 | if (!hctx) | |
| 53 | return &bt->ws[0]; | |
| 54 | return sbq_wait_ptr(bt, &hctx->wait_index); | |
| 55 | } | |
| 56 | ||
| 320ae51f | 57 | enum { |
| 419c3d5e | 58 | BLK_MQ_NO_TAG = -1U, |
| 5385fa47 | 59 | BLK_MQ_TAG_MIN = 1, |
| 419c3d5e | 60 | BLK_MQ_TAG_MAX = BLK_MQ_NO_TAG - 1, |
| 320ae51f JA |
61 | }; |
| 62 | ||
| 0d2602ca JA |
63 | extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *); |
| 64 | extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *); | |
| 65 | ||
| 66 | static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx) | |
| 67 | { | |
| 51db1c37 | 68 | if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)) |
| 0d2602ca JA |
69 | return false; |
| 70 | ||
| 71 | return __blk_mq_tag_busy(hctx); | |
| 72 | } | |
| 73 | ||
| 74 | static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx) | |
| 75 | { | |
| 51db1c37 | 76 | if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)) |
| 0d2602ca JA |
77 | return; |
| 78 | ||
| 79 | __blk_mq_tag_idle(hctx); | |
| 80 | } | |
| 81 | ||
| 415b806d SG |
82 | static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags, |
| 83 | unsigned int tag) | |
| 84 | { | |
| 85 | return tag < tags->nr_reserved_tags; | |
| 86 | } | |
| 87 | ||
| 320ae51f | 88 | #endif |