/* SPDX-License-Identifier: GPL-2.0-only */ /* * fence-array: aggregates fence to be waited together * * Copyright (C) 2016 Collabora Ltd * Copyright (C) 2016 Advanced Micro Devices, Inc. * Authors: * Gustavo Padovan <gustavo@padovan.org> * Christian König <christian.koenig@amd.com> */ #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 */ struct dma_fence_array { struct dma_fence base; spinlock_t lock; unsigned num_fences; atomic_t num_pending; struct dma_fence **fences; struct irq_work work; }; extern const struct dma_fence_ops dma_fence_array_ops; /** * dma_fence_is_array - check if a fence is from the array subsclass * @fence: fence to test * * Return true if it is a dma_fence_array and false otherwise. */ static inline bool dma_fence_is_array(struct dma_fence *fence) { return fence->ops == &dma_fence_array_ops; } /** * 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->ops != &dma_fence_array_ops) return NULL; return container_of(fence, struct dma_fence_array, base); } struct dma_fence_array *dma_fence_array_create(int num_fences, struct dma_fence **fences, u64 context, unsigned seqno, bool signal_on_any); bool dma_fence_match_context(struct dma_fence *fence, u64 context); #endif /* __LINUX_DMA_FENCE_ARRAY_H */