/* SPDX-License-Identifier: GPL-2.0 */
|
#ifndef INT_BLK_MQ_TAG_H
|
#define INT_BLK_MQ_TAG_H
|
|
#include "blk-mq.h"
|
|
/*
|
* 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;
|
};
|
|
|
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 unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
|
extern void blk_mq_put_tag(struct blk_mq_hw_ctx *hctx, struct blk_mq_tags *tags,
|
struct blk_mq_ctx *ctx, unsigned int tag);
|
extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags);
|
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_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);
|
|
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_TAG_FAIL = -1U,
|
BLK_MQ_TAG_MIN = 1,
|
BLK_MQ_TAG_MAX = BLK_MQ_TAG_FAIL - 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_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_SHARED))
|
return;
|
|
__blk_mq_tag_idle(hctx);
|
}
|
|
/*
|
* This helper should only be used for flush request to share tag
|
* with the request cloned from, and both the two requests can't be
|
* in flight at the same time. The caller has to make sure the tag
|
* can't be freed.
|
*/
|
static inline void blk_mq_tag_set_rq(struct blk_mq_hw_ctx *hctx,
|
unsigned int tag, struct request *rq)
|
{
|
hctx->tags->rqs[tag] = rq;
|
}
|
|
static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
|
unsigned int tag)
|
{
|
return tag < tags->nr_reserved_tags;
|
}
|
|
#endif
|
