projects / thirdparty / kernel / stable.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 | ||
| e93ecf60 JA |
5 | #include "blk-mq.h" |
| 6 | ||
| 24d2f903 CH |
7 | /* |
| 8 | * Tag address space map. | |
| 9 | */ | |
| 10 | struct blk_mq_tags { | |
| 11 | unsigned int nr_tags; | |
| 12 | unsigned int nr_reserved_tags; | |
| 24d2f903 | 13 | |
| 0d2602ca JA |
14 | atomic_t active_queues; |
| 15 | ||
| 88459642 OS |
16 | struct sbitmap_queue bitmap_tags; |
| 17 | struct sbitmap_queue breserved_tags; | |
| 24d2f903 CH |
18 | |
| 19 | struct request **rqs; | |
| 2af8cbe3 | 20 | struct request **static_rqs; |
| 24d2f903 CH |
21 | struct list_head page_list; |
| 22 | }; | |
| 23 | ||
| 320ae51f | 24 | |
| 24391c0d | 25 | extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags, unsigned int reserved_tags, int node, int alloc_policy); |
| 320ae51f JA |
26 | extern void blk_mq_free_tags(struct blk_mq_tags *tags); |
| 27 | ||
| cb96a42c | 28 | extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data); |
| 4941115b JA |
29 | extern void blk_mq_put_tag(struct blk_mq_hw_ctx *hctx, struct blk_mq_tags *tags, |
| 30 | struct blk_mq_ctx *ctx, unsigned int tag); | |
| 320ae51f | 31 | extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags); |
| 70f36b60 JA |
32 | extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx, |
| 33 | struct blk_mq_tags **tags, | |
| 34 | unsigned int depth, bool can_grow); | |
| aed3ea94 | 35 | extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool); |
| 0bf6cd5b CH |
36 | void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn, |
| 37 | void *priv); | |
| 320ae51f | 38 | |
| 88459642 OS |
39 | static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt, |
| 40 | struct blk_mq_hw_ctx *hctx) | |
| 41 | { | |
| 42 | if (!hctx) | |
| 43 | return &bt->ws[0]; | |
| 44 | return sbq_wait_ptr(bt, &hctx->wait_index); | |
| 45 | } | |
| 46 | ||
| 320ae51f JA |
47 | enum { |
| 48 | BLK_MQ_TAG_FAIL = -1U, | |
| 5385fa47 | 49 | BLK_MQ_TAG_MIN = 1, |
| 320ae51f JA |
50 | BLK_MQ_TAG_MAX = BLK_MQ_TAG_FAIL - 1, |
| 51 | }; | |
| 52 | ||
| 0d2602ca JA |
53 | extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *); |
| 54 | extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *); | |
| 55 | ||
| 56 | static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx) | |
| 57 | { | |
| 58 | if (!(hctx->flags & BLK_MQ_F_TAG_SHARED)) | |
| 59 | return false; | |
| 60 | ||
| 61 | return __blk_mq_tag_busy(hctx); | |
| 62 | } | |
| 63 | ||
| 64 | static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx) | |
| 65 | { | |
| 66 | if (!(hctx->flags & BLK_MQ_F_TAG_SHARED)) | |
| 67 | return; | |
| 68 | ||
| 69 | __blk_mq_tag_idle(hctx); | |
| 70 | } | |
| 71 | ||
| 0048b483 ML |
72 | /* |
| 73 | * This helper should only be used for flush request to share tag | |
| 74 | * with the request cloned from, and both the two requests can't be | |
| 75 | * in flight at the same time. The caller has to make sure the tag | |
| 76 | * can't be freed. | |
| 77 | */ | |
| 78 | static inline void blk_mq_tag_set_rq(struct blk_mq_hw_ctx *hctx, | |
| 79 | unsigned int tag, struct request *rq) | |
| 80 | { | |
| 81 | hctx->tags->rqs[tag] = rq; | |
| 82 | } | |
| 83 | ||
| 415b806d SG |
84 | static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags, |
| 85 | unsigned int tag) | |
| 86 | { | |
| 87 | return tag < tags->nr_reserved_tags; | |
| 88 | } | |
| 89 | ||
| 320ae51f | 90 | #endif |