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
38 extern int blk_mq_init_shared_sbitmap(struct blk_mq_tag_set *set,
39 unsigned int flags);
40 extern void blk_mq_exit_shared_sbitmap(struct blk_mq_tag_set *set);
41
42 extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
43 extern void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx,
44 unsigned int tag);
45 extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
46 struct blk_mq_tags **tags,
47 unsigned int depth, bool can_grow);
48 extern void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set,
49 unsigned int size);
50
51 extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
52 void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
53 void *priv);
54 void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
55 void *priv);
56
bt_wait_ptr(struct sbitmap_queue * bt,struct blk_mq_hw_ctx * hctx)57 static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt,
58 struct blk_mq_hw_ctx *hctx)
59 {
60 if (!hctx)
61 return &bt->ws[0];
62 return sbq_wait_ptr(bt, &hctx->wait_index);
63 }
64
65 enum {
66 BLK_MQ_NO_TAG = -1U,
67 BLK_MQ_TAG_MIN = 1,
68 BLK_MQ_TAG_MAX = BLK_MQ_NO_TAG - 1,
69 };
70
71 extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
72 extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
73
blk_mq_tag_busy(struct blk_mq_hw_ctx * hctx)74 static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
75 {
76 if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
77 return false;
78
79 return __blk_mq_tag_busy(hctx);
80 }
81
blk_mq_tag_idle(struct blk_mq_hw_ctx * hctx)82 static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
83 {
84 if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
85 return;
86
87 __blk_mq_tag_idle(hctx);
88 }
89
blk_mq_tag_is_reserved(struct blk_mq_tags * tags,unsigned int tag)90 static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
91 unsigned int tag)
92 {
93 return tag < tags->nr_reserved_tags;
94 }
95
96 #endif
97