[linux-2.6-block.git] / block / blk-mq-tag.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef INT_BLK_MQ_TAG_H
#define INT_BLK_MQ_TAG_H

struct blk_mq_alloc_data;

/*
 * Tag address space map.
 */
struct blk_mq_tags {
	unsigned int nr_tags;
	unsigned int nr_reserved_tags;

	atomic_t active_queues;

	struct sbitmap_queue bitmap_tags;
	struct sbitmap_queue breserved_tags;

	struct request **rqs;
	struct request **static_rqs;
	struct list_head page_list;

	/*
	 * used to clear request reference in rqs[] before freeing one
	 * request pool
	 */
	spinlock_t lock;
};

extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags,
					unsigned int reserved_tags,
					int node, int alloc_policy);
extern void blk_mq_free_tags(struct blk_mq_tags *tags);
extern int blk_mq_init_bitmaps(struct sbitmap_queue *bitmap_tags,
			       struct sbitmap_queue *breserved_tags,
			       unsigned int queue_depth,
			       unsigned int reserved,
			       int node, int alloc_policy);

extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
extern void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx,
			   unsigned int tag);
extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
					struct blk_mq_tags **tags,
					unsigned int depth, bool can_grow);
extern void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set,
					     unsigned int size);
extern void blk_mq_tag_update_sched_shared_sbitmap(struct request_queue *q);

extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
		void *priv);
void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
		void *priv);

static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt,
						 struct blk_mq_hw_ctx *hctx)
{
	if (!hctx)
		return &bt->ws[0];
	return sbq_wait_ptr(bt, &hctx->wait_index);
}

enum {
	BLK_MQ_NO_TAG		= -1U,
	BLK_MQ_TAG_MIN		= 1,
	BLK_MQ_TAG_MAX		= BLK_MQ_NO_TAG - 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_QUEUE_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_QUEUE_SHARED))
		return;

	__blk_mq_tag_idle(hctx);
}

static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
					  unsigned int tag)
{
	return tag < tags->nr_reserved_tags;
}

#endif
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
2e9bc346 CH	5	struct blk_mq_alloc_data;
2e9bc346 CH	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;
0d2602ca JA	15
ae0f1a73 JG	16	struct sbitmap_queue bitmap_tags;
ae0f1a73 JG	17	struct sbitmap_queue breserved_tags;
24d2f903 CH	18
24d2f903 CH	19	struct request **rqs;
2af8cbe3	20	struct request **static_rqs;
24d2f903	21	struct list_head page_list;
bd63141d ML	22
	23	/*
	24	* used to clear request reference in rqs[] before freeing one
	25	* request pool
	26	*/
	27	spinlock_t lock;
24d2f903 CH	28	};
24d2f903 CH	29
1c0706a7 JG	30	extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags,
1c0706a7 JG	31	unsigned int reserved_tags,
e155b0c2 JG	32	int node, int alloc_policy);
e155b0c2 JG	33	extern void blk_mq_free_tags(struct blk_mq_tags *tags);
56b68085 JG	34	extern int blk_mq_init_bitmaps(struct sbitmap_queue *bitmap_tags,
	35	struct sbitmap_queue *breserved_tags,
	36	unsigned int queue_depth,
	37	unsigned int reserved,
	38	int node, int alloc_policy);
320ae51f	39
cb96a42c	40	extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
cae740a0 JG	41	extern void blk_mq_put_tag(struct blk_mq_tags tags, struct blk_mq_ctx ctx,
cae740a0 JG	42	unsigned int tag);
70f36b60 JA	43	extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
	44	struct blk_mq_tags **tags,
	45	unsigned int depth, bool can_grow);
32bc15af JG	46	extern void blk_mq_tag_resize_shared_sbitmap(struct blk_mq_tag_set *set,
32bc15af JG	47	unsigned int size);
a7e7388d	48	extern void blk_mq_tag_update_sched_shared_sbitmap(struct request_queue *q);
32bc15af	49
aed3ea94	50	extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
0bf6cd5b CH	51	void blk_mq_queue_tag_busy_iter(struct request_queue q, busy_iter_fn fn,
0bf6cd5b CH	52	void *priv);
602380d2 ML	53	void blk_mq_all_tag_iter(struct blk_mq_tags tags, busy_tag_iter_fn fn,
602380d2 ML	54	void *priv);
320ae51f	55
88459642 OS	56	static inline struct sbq_wait_state bt_wait_ptr(struct sbitmap_queue bt,
	57	struct blk_mq_hw_ctx *hctx)
	58	{
	59	if (!hctx)
	60	return &bt->ws[0];
	61	return sbq_wait_ptr(bt, &hctx->wait_index);
	62	}
	63
320ae51f	64	enum {
419c3d5e	65	BLK_MQ_NO_TAG = -1U,
5385fa47	66	BLK_MQ_TAG_MIN = 1,
419c3d5e	67	BLK_MQ_TAG_MAX = BLK_MQ_NO_TAG - 1,
320ae51f JA	68	};
320ae51f JA	69
0d2602ca JA	70	extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
	71	extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
	72
	73	static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
	74	{
51db1c37	75	if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
0d2602ca JA	76	return false;
	77
	78	return __blk_mq_tag_busy(hctx);
	79	}
	80
	81	static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
	82	{
51db1c37	83	if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
0d2602ca JA	84	return;
	85
	86	__blk_mq_tag_idle(hctx);
	87	}
	88
415b806d SG	89	static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
	90	unsigned int tag)
	91	{
	92	return tag < tags->nr_reserved_tags;
	93	}
	94
320ae51f	95	#endif