99 строки
2.6 KiB
C
99 строки
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef INT_BLK_MQ_TAG_H
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#define INT_BLK_MQ_TAG_H
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struct blk_mq_alloc_data;
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/*
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* Tag address space map.
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*/
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struct blk_mq_tags {
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unsigned int nr_tags;
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unsigned int nr_reserved_tags;
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atomic_t active_queues;
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struct sbitmap_queue bitmap_tags;
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struct sbitmap_queue breserved_tags;
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struct request **rqs;
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struct request **static_rqs;
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struct list_head page_list;
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/*
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* used to clear request reference in rqs[] before freeing one
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* request pool
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*/
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spinlock_t lock;
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};
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extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags,
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unsigned int reserved_tags,
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int node, int alloc_policy);
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extern void blk_mq_free_tags(struct blk_mq_tags *tags);
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extern int blk_mq_init_bitmaps(struct sbitmap_queue *bitmap_tags,
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struct sbitmap_queue *breserved_tags,
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unsigned int queue_depth,
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unsigned int reserved,
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int node, int alloc_policy);
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extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
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unsigned long blk_mq_get_tags(struct blk_mq_alloc_data *data, int nr_tags,
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unsigned int *offset);
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extern void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx,
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unsigned int tag);
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void blk_mq_put_tags(struct blk_mq_tags *tags, int *tag_array, int nr_tags);
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extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
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struct blk_mq_tags **tags,
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unsigned int depth, bool can_grow);
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extern void blk_mq_tag_resize_shared_tags(struct blk_mq_tag_set *set,
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unsigned int size);
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extern void blk_mq_tag_update_sched_shared_tags(struct request_queue *q);
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extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
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void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
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void *priv);
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void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
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void *priv);
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static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt,
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struct blk_mq_hw_ctx *hctx)
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{
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if (!hctx)
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return &bt->ws[0];
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return sbq_wait_ptr(bt, &hctx->wait_index);
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}
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enum {
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BLK_MQ_NO_TAG = -1U,
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BLK_MQ_TAG_MIN = 1,
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BLK_MQ_TAG_MAX = BLK_MQ_NO_TAG - 1,
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};
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extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
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extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
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static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
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{
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if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
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return false;
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return __blk_mq_tag_busy(hctx);
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}
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static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
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{
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if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
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return;
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__blk_mq_tag_idle(hctx);
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}
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static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
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unsigned int tag)
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{
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return tag < tags->nr_reserved_tags;
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}
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#endif
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