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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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fc39f8d2d1
Typedefs busy_iter_fn and busy_tag_iter_fn are now identical, so delete busy_iter_fn to reduce duplication. It would be nicer to delete busy_tag_iter_fn, as the name busy_iter_fn is less specific. However busy_tag_iter_fn is used in many different parts of the tree, unlike busy_iter_fn which is just use in block/, so just take the straightforward path now, so that we could rename later treewide. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Tested-by: Kashyap Desai <kashyap.desai@broadcom.com> Link: https://lore.kernel.org/r/1638794990-137490-3-git-send-email-john.garry@huawei.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
75 lines
2.3 KiB
C
75 lines
2.3 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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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_tag_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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