cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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blk-mq-tag.h (2306B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef INT_BLK_MQ_TAG_H
      3#define INT_BLK_MQ_TAG_H
      4
      5struct blk_mq_alloc_data;
      6
      7extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags,
      8					unsigned int reserved_tags,
      9					int node, int alloc_policy);
     10extern void blk_mq_free_tags(struct blk_mq_tags *tags);
     11extern int blk_mq_init_bitmaps(struct sbitmap_queue *bitmap_tags,
     12			       struct sbitmap_queue *breserved_tags,
     13			       unsigned int queue_depth,
     14			       unsigned int reserved,
     15			       int node, int alloc_policy);
     16
     17extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
     18unsigned long blk_mq_get_tags(struct blk_mq_alloc_data *data, int nr_tags,
     19			      unsigned int *offset);
     20extern void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx,
     21			   unsigned int tag);
     22void blk_mq_put_tags(struct blk_mq_tags *tags, int *tag_array, int nr_tags);
     23extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
     24					struct blk_mq_tags **tags,
     25					unsigned int depth, bool can_grow);
     26extern void blk_mq_tag_resize_shared_tags(struct blk_mq_tag_set *set,
     27					     unsigned int size);
     28extern void blk_mq_tag_update_sched_shared_tags(struct request_queue *q);
     29
     30extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
     31void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_tag_iter_fn *fn,
     32		void *priv);
     33void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
     34		void *priv);
     35
     36static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt,
     37						 struct blk_mq_hw_ctx *hctx)
     38{
     39	if (!hctx)
     40		return &bt->ws[0];
     41	return sbq_wait_ptr(bt, &hctx->wait_index);
     42}
     43
     44enum {
     45	BLK_MQ_NO_TAG		= -1U,
     46	BLK_MQ_TAG_MIN		= 1,
     47	BLK_MQ_TAG_MAX		= BLK_MQ_NO_TAG - 1,
     48};
     49
     50extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
     51extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
     52
     53static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
     54{
     55	if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
     56		return false;
     57
     58	return __blk_mq_tag_busy(hctx);
     59}
     60
     61static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
     62{
     63	if (!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
     64		return;
     65
     66	__blk_mq_tag_idle(hctx);
     67}
     68
     69static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
     70					  unsigned int tag)
     71{
     72	return tag < tags->nr_reserved_tags;
     73}
     74
     75#endif