/** * struct dma_fence_unwrap - cursor into the container structure * * Should be used with dma_fence_unwrap_for_each() iterator macro.
*/ struct dma_fence_unwrap { /** * @chain: potential dma_fence_chain, but can be other fence as well
*/ struct dma_fence *chain; /** * @array: potential dma_fence_array, but can be other fence as well
*/ struct dma_fence *array; /** * @index: last returned index if @array is really a dma_fence_array
*/ unsignedint index;
};
/** * dma_fence_unwrap_for_each - iterate over all fences in containers * @fence: current fence * @cursor: current position inside the containers * @head: starting point for the iterator * * Unwrap dma_fence_chain and dma_fence_array containers and deep dive into all * potential fences in them. If @head is just a normal fence only that one is * returned.
*/ #define dma_fence_unwrap_for_each(fence, cursor, head) \ for (fence = dma_fence_unwrap_first(head, cursor); fence; \
fence = dma_fence_unwrap_next(cursor))
int dma_fence_dedup_array(struct dma_fence **array, int num_fences);
/** * dma_fence_unwrap_merge - unwrap and merge fences * * All fences given as parameters are unwrapped and merged back together as flat * dma_fence_array. Useful if multiple containers need to be merged together. * * Implemented as a macro to allocate the necessary arrays on the stack and * account the stack frame size to the caller. * * Returns NULL on memory allocation failure, a dma_fence object representing * all the given fences otherwise.
*/ #define dma_fence_unwrap_merge(...) \
({ \ struct dma_fence *__f[] = { __VA_ARGS__ }; \ struct dma_fence_unwrap __c[ARRAY_SIZE(__f)]; \
\
__dma_fence_unwrap_merge(ARRAY_SIZE(__f), __f, __c); \
})
#endif
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