diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_range_fence.h')
-rw-r--r-- | drivers/gpu/drm/xe/xe_range_fence.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_range_fence.h b/drivers/gpu/drm/xe/xe_range_fence.h new file mode 100644 index 0000000000..edd58b34f5 --- /dev/null +++ b/drivers/gpu/drm/xe/xe_range_fence.h @@ -0,0 +1,75 @@ +/* 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 |