1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef INT_BLK_MQ_TAG_H
3 #define INT_BLK_MQ_TAG_H
4
5 /*
6 * Tag address space map.
7 */
8 struct blk_mq_tags {
9 unsigned int nr_tags;
10 unsigned int nr_reserved_tags;
11
12 atomic_t active_queues;
13
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;
19
20 struct request **rqs;
21 struct request **static_rqs;
22 struct list_head page_list;
23
24 /*
25 * used to clear request reference in rqs[] before freeing one
26 * request pool
27 */
28 spinlock_t lock;
29
30 ANDROID_OEM_DATA(1);
31 };
32
33 extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags,
34 unsigned int reserved_tags,
35 int node, unsigned int flags);
36 extern void blk_mq_free_tags(struct blk_mq_tags *tags, unsigned int flags);
37 extern int blk_mq_init_bitmaps(struct sbitmap_queue *bitmap_tags,
38 struct sbitmap_queue *breserved_tags,
39 unsigned int queue_depth,
40 unsigned int reserved,
41 int node, int alloc_policy);
42
43 extern int blk_mq_init_shared_sbitmap(struct blk_mq_tag_set *set);
44 extern void blk_mq_exit_shared_sbitmap(struct blk_mq_tag_set *set);
45 extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
46 extern void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx,
47 unsigned int tag);
48 extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
49 struct blk_mq_tags **tags,
50 unsigned int depth, bool can_grow);
51 extern void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set,
52 unsigned int size);
53
54 extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
55 void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
56 void *priv);
57 void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
58 void *priv);
59
bt_wait_ptr(struct sbitmap_queue * bt,struct blk_mq_hw_ctx * hctx)60 static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt,
61 struct blk_mq_hw_ctx *hctx)
62 {
63 if (!hctx)
64 return &bt->ws[0];
65 return sbq_wait_ptr(bt, &hctx->wait_index);
66 }
67
68 enum {
69 BLK_MQ_NO_TAG = -1U,
70 BLK_MQ_TAG_MIN = 1,
71 BLK_MQ_TAG_MAX = BLK_MQ_NO_TAG - 1,
72 };
73
74 extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
75 extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
76
blk_mq_tag_busy(struct blk_mq_hw_ctx * hctx)77 static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
78 {
79 if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
80 return false;
81
82 return __blk_mq_tag_busy(hctx);
83 }
84
blk_mq_tag_idle(struct blk_mq_hw_ctx * hctx)85 static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
86 {
87 if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
88 return;
89
90 __blk_mq_tag_idle(hctx);
91 }
92
blk_mq_tag_is_reserved(struct blk_mq_tags * tags,unsigned int tag)93 static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
94 unsigned int tag)
95 {
96 return tag < tags->nr_reserved_tags;
97 }
98
99 #endif
100