linux/drivers/gpu/drm/xe/xe_range_fence.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2023 Intel Corporation
 */

#include <linux/dma-fence.h>
#include <linux/interval_tree_generic.h>
#include <linux/slab.h>

#include "xe_macros.h"
#include "xe_range_fence.h"

#define XE_RANGE_TREE_START(_node) …
#define XE_RANGE_TREE_LAST(_node) …

INTERVAL_TREE_DEFINE(struct xe_range_fence, rb, u64, __subtree_last,
		     XE_RANGE_TREE_START, XE_RANGE_TREE_LAST, static,
		     xe_range_fence_tree);

static void
xe_range_fence_signal_notify(struct dma_fence *fence, struct dma_fence_cb *cb)
{ … }

static bool __xe_range_fence_tree_cleanup(struct xe_range_fence_tree *tree)
{ … }

/**
 * xe_range_fence_insert() - range fence insert
 * @tree: range fence tree to insert intoi
 * @rfence: range fence
 * @ops: range fence ops
 * @start: start address of range fence
 * @last: last address of range fence
 * @fence: dma fence which signals range fence can be removed + freed
 *
 * Return: 0 on success, non-zero on failure
 */
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 last, struct dma_fence *fence)
{ … }

static void xe_range_fence_tree_remove_all(struct xe_range_fence_tree *tree)
{ … }

/**
 * xe_range_fence_tree_init() - Init range fence tree
 * @tree: range fence tree
 */
void xe_range_fence_tree_init(struct xe_range_fence_tree *tree)
{ … }

/**
 * xe_range_fence_tree_fini() - Fini range fence tree
 * @tree: range fence tree
 */
void xe_range_fence_tree_fini(struct xe_range_fence_tree *tree)
{ … }

/**
 * xe_range_fence_tree_first() - range fence tree iterator first
 * @tree: range fence tree
 * @start: start address of range fence
 * @last: last address of range fence
 *
 * Return: first range fence found in range or NULL
 */
struct xe_range_fence *
xe_range_fence_tree_first(struct xe_range_fence_tree *tree, u64 start,
			  u64 last)
{ … }

/**
 * xe_range_fence_tree_next() - range fence tree iterator next
 * @rfence: current range fence
 * @start: start address of range fence
 * @last: last address of range fence
 *
 * Return: next range fence found in range or NULL
 */
struct xe_range_fence *
xe_range_fence_tree_next(struct xe_range_fence *rfence, u64 start, u64 last)
{ … }

static void xe_range_fence_free(struct xe_range_fence *rfence)
{ … }

const struct xe_range_fence_ops xe_range_fence_kfree_ops = …;