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84 lines
2.1 KiB
84 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* fence-array: aggregates fence to be waited together |
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* |
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* Copyright (C) 2016 Collabora Ltd |
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* Copyright (C) 2016 Advanced Micro Devices, Inc. |
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* Authors: |
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* Gustavo Padovan <[email protected]> |
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* Christian König <[email protected]> |
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*/ |
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#ifndef __LINUX_DMA_FENCE_ARRAY_H |
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#define __LINUX_DMA_FENCE_ARRAY_H |
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#include <linux/dma-fence.h> |
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#include <linux/irq_work.h> |
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/** |
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* struct dma_fence_array_cb - callback helper for fence array |
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* @cb: fence callback structure for signaling |
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* @array: reference to the parent fence array object |
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*/ |
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struct dma_fence_array_cb { |
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struct dma_fence_cb cb; |
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struct dma_fence_array *array; |
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}; |
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/** |
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* struct dma_fence_array - fence to represent an array of fences |
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* @base: fence base class |
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* @lock: spinlock for fence handling |
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* @num_fences: number of fences in the array |
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* @num_pending: fences in the array still pending |
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* @fences: array of the fences |
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* @work: internal irq_work function |
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*/ |
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struct dma_fence_array { |
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struct dma_fence base; |
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spinlock_t lock; |
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unsigned num_fences; |
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atomic_t num_pending; |
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struct dma_fence **fences; |
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struct irq_work work; |
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}; |
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extern const struct dma_fence_ops dma_fence_array_ops; |
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/** |
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* dma_fence_is_array - check if a fence is from the array subsclass |
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* @fence: fence to test |
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* |
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* Return true if it is a dma_fence_array and false otherwise. |
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*/ |
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static inline bool dma_fence_is_array(struct dma_fence *fence) |
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{ |
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return fence->ops == &dma_fence_array_ops; |
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} |
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/** |
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* to_dma_fence_array - cast a fence to a dma_fence_array |
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* @fence: fence to cast to a dma_fence_array |
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* |
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* Returns NULL if the fence is not a dma_fence_array, |
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* or the dma_fence_array otherwise. |
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*/ |
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static inline struct dma_fence_array * |
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to_dma_fence_array(struct dma_fence *fence) |
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{ |
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if (fence->ops != &dma_fence_array_ops) |
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return NULL; |
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return container_of(fence, struct dma_fence_array, base); |
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} |
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struct dma_fence_array *dma_fence_array_create(int num_fences, |
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struct dma_fence **fences, |
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u64 context, unsigned seqno, |
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bool signal_on_any); |
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bool dma_fence_match_context(struct dma_fence *fence, u64 context); |
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#endif /* __LINUX_DMA_FENCE_ARRAY_H */
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