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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#ifndef __LINUX_DMA_FENCE_ARRAY_H#define __LINUX_DMA_FENCE_ARRAY_H
#include <linux/dma-fence.h>#include <linux/irq_work.h>
/** * struct dma_fence_array_cb - callback helper for fence array * @cb: fence callback structure for signaling * @array: reference to the parent fence array object */struct dma_fence_array_cb { struct dma_fence_cb cb; struct dma_fence_array *array;};
/** * struct dma_fence_array - fence to represent an array of fences * @base: fence base class * @lock: spinlock for fence handling * @num_fences: number of fences in the array * @num_pending: fences in the array still pending * @fences: array of the fences * @work: internal irq_work function * @callbacks: array of callback helpers */struct dma_fence_array { struct dma_fence base;
unsigned num_fences; atomic_t num_pending; struct dma_fence **fences;
struct irq_work work;
struct dma_fence_array_cb callbacks[] __counted_by(num_fences);};
/** * to_dma_fence_array - cast a fence to a dma_fence_array * @fence: fence to cast to a dma_fence_array * * Returns NULL if the fence is not a dma_fence_array, * or the dma_fence_array otherwise. */static inline struct dma_fence_array *to_dma_fence_array(struct dma_fence *fence){ if (!fence || !dma_fence_is_array(fence)) return NULL;
return container_of(fence, struct dma_fence_array, base);}
/** * dma_fence_array_for_each - iterate over all fences in array * @fence: current fence * @index: index into the array * @head: potential dma_fence_array object * * Test if @array is a dma_fence_array object and if yes iterate over all fences * in the array. If not just iterate over the fence in @array itself. * * For a deep dive iterator see dma_fence_unwrap_for_each(). */#define dma_fence_array_for_each(fence, index, head) \ for (index = 0, fence = dma_fence_array_first(head); fence; \ ++(index), fence = dma_fence_array_next(head, index))
struct dma_fence_array *dma_fence_array_alloc(int num_fences);void dma_fence_array_init(struct dma_fence_array *array, int num_fences, struct dma_fence **fences, u64 context, unsigned seqno);
struct dma_fence_array *dma_fence_array_create(int num_fences, struct dma_fence **fences, u64 context, unsigned seqno);
bool dma_fence_match_context(struct dma_fence *fence, u64 context);
struct dma_fence *dma_fence_array_first(struct dma_fence *head);struct dma_fence *dma_fence_array_next(struct dma_fence *head, unsigned int index);
#endif /* __LINUX_DMA_FENCE_ARRAY_H */