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83 lines
2.2 KiB
83 lines
2.2 KiB
/* |
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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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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 as published by |
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* the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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* more details. |
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*/ |
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#ifndef __LINUX_FENCE_ARRAY_H |
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#define __LINUX_FENCE_ARRAY_H |
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#include <linux/fence.h> |
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/** |
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* struct 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 fence_array_cb { |
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struct fence_cb cb; |
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struct fence_array *array; |
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}; |
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/** |
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* struct 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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*/ |
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struct fence_array { |
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struct 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 fence **fences; |
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}; |
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extern const struct fence_ops fence_array_ops; |
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/** |
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* fence_is_array - check if a fence is from the array subsclass |
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* |
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* Return true if it is a fence_array and false otherwise. |
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*/ |
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static inline bool fence_is_array(struct fence *fence) |
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{ |
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return fence->ops == &fence_array_ops; |
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} |
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/** |
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* to_fence_array - cast a fence to a fence_array |
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* @fence: fence to cast to a fence_array |
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* |
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* Returns NULL if the fence is not a fence_array, |
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* or the fence_array otherwise. |
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*/ |
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static inline struct fence_array *to_fence_array(struct fence *fence) |
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{ |
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if (fence->ops != &fence_array_ops) |
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return NULL; |
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return container_of(fence, struct fence_array, base); |
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} |
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struct fence_array *fence_array_create(int num_fences, struct fence **fences, |
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u64 context, unsigned seqno, |
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bool signal_on_any); |
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#endif /* __LINUX_FENCE_ARRAY_H */
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