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Current Path : /lib/modules/3.10.0-1160.92.1.el7.x86_64/build/include/linux/

Linux 43-225-53-84.webhostbox.net 3.10.0-1160.92.1.el7.x86_64 #1 SMP Tue Jun 20 11:48:01 UTC 2023 x86_64

Current File : //lib/modules/3.10.0-1160.92.1.el7.x86_64/build/include/linux/dma-fence-array.h

/*
 * 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>
 *
 * 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.
 */

#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
 */
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 */

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