3  * fence-chain: chain fences together in a timeline
13 #include <linux/dma-fence.h>
18  * struct dma_fence_chain - fence to represent an node of a fence chain
19  * @base: fence base class
20  * @prev: previous fence of the chain
22  * @fence: encapsulated fence
23  * @lock: spinlock for fence handling
29 	struct dma_fence *fence;  member
35 		 * complection of the fence chain. Never used at the same time
54  * to_dma_fence_chain - cast a fence to a dma_fence_chain
55  * @fence: fence to cast to a dma_fence_array
57  * Returns NULL if the fence is not a dma_fence_chain,
61 to_dma_fence_chain(struct dma_fence *fence)  in to_dma_fence_chain()  argument
63 	if (!fence || !dma_fence_is_chain(fence))  in to_dma_fence_chain()
66 	return container_of(fence, struct dma_fence_chain, base);  in to_dma_fence_chain()
70  * dma_fence_chain_contained - return the contained fence
71  * @fence: the fence to test
73  * If the fence is a dma_fence_chain the function returns the fence contained
74  * inside the chain object, otherwise it returns the fence itself.
77 dma_fence_chain_contained(struct dma_fence *fence)  in dma_fence_chain_contained()  argument
79 	struct dma_fence_chain *chain = to_dma_fence_chain(fence);  in dma_fence_chain_contained()
81 	return chain ? chain->fence : fence;  in dma_fence_chain_contained()
101  * doesn't need an RCU grace period since the fence was never initialized nor
102  * published. After dma_fence_chain_init() has been called the fence must be
112  * @iter: current fence
116  * fence while inside the loop which must be dropped when breaking out.
124 struct dma_fence *dma_fence_chain_walk(struct dma_fence *fence);
128 			  struct dma_fence *fence,