blob: bc8940ca280dc74c36c706dc6d7c831a39381cc4 [file] [log] [blame]
* fence-array: aggregates fence to be waited together
* Copyright (C) 2016 Collabora Ltd
* Copyright (C) 2016 Advanced Micro Devices, Inc.
* Authors:
* Gustavo Padovan <>
* Christian K├Ânig <>
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
#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
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 */