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/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2023 Intel Corporation
*/
#ifndef _XE_RANGE_FENCE_H_
#define _XE_RANGE_FENCE_H_
#include <linux/dma-fence.h>
#include <linux/rbtree.h>
#include <linux/types.h>
struct xe_range_fence_tree;
struct xe_range_fence;
/** struct xe_range_fence_ops - XE range fence ops */
struct xe_range_fence_ops {
/** @free: free range fence op */
void (*free)(struct xe_range_fence *rfence);
};
/** struct xe_range_fence - XE range fence (address conflict tracking) */
struct xe_range_fence {
/** @rb: RB tree node inserted into interval tree */
struct rb_node rb;
/** @start: start address of range fence is interval tree */
u64 start;
/** @last: last address (inclusive) of range fence is interval tree */
u64 last;
/** @__subtree_last: interval tree internal usage */
u64 __subtree_last;
/**
* @fence: fence signals address in range fence no longer has conflict
*/
struct dma_fence *fence;
/** @tree: interval tree which range fence belongs to */
struct xe_range_fence_tree *tree;
/**
* @cb: callback when fence signals to remove range fence free from interval tree
*/
struct dma_fence_cb cb;
/** @link: used to defer free of range fence to non-irq context */
struct llist_node link;
/** @ops: range fence ops */
const struct xe_range_fence_ops *ops;
};
/** struct xe_range_fence_tree - interval tree to store range fences */
struct xe_range_fence_tree {
/** @root: interval tree root */
struct rb_root_cached root;
/** @list: list of pending range fences to be freed */
struct llist_head list;
};
extern const struct xe_range_fence_ops xe_range_fence_kfree_ops;
struct xe_range_fence *
xe_range_fence_tree_first(struct xe_range_fence_tree *tree, u64 start,
u64 last);
struct xe_range_fence *
xe_range_fence_tree_next(struct xe_range_fence *rfence, u64 start, u64 last);
void xe_range_fence_tree_init(struct xe_range_fence_tree *tree);
void xe_range_fence_tree_fini(struct xe_range_fence_tree *tree);
int xe_range_fence_insert(struct xe_range_fence_tree *tree,
struct xe_range_fence *rfence,
const struct xe_range_fence_ops *ops,
u64 start, u64 end,
struct dma_fence *fence);
#endif
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