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/* SPDX-License-Identifier: GPL-2.0 */
/*
 * DMABUF Heaps Allocation Infrastructure
 *
 * Copyright (C) 2011 Google, Inc.
 * Copyright (C) 2019 Linaro Ltd.
 */

#ifndef _DMA_HEAPS_H
#define _DMA_HEAPS_H

#include <linux/cdev.h>
#include <linux/types.h>

struct dma_heap;

/**
 * struct dma_heap_ops - ops to operate on a given heap
 * @allocate:		allocate dmabuf and return struct dma_buf ptr
 *
 * allocate returns dmabuf on success, ERR_PTR(-errno) on error.
 */
struct dma_heap_ops {
	struct dma_buf *(*allocate)(struct dma_heap *heap,
				    unsigned long len,
				    unsigned long fd_flags,
				    unsigned long heap_flags);
};

/**
 * struct dma_heap_export_info - information needed to export a new dmabuf heap
 * @name:	used for debugging/device-node name
 * @ops:	ops struct for this heap
 * @priv:	heap exporter private data
 *
 * Information needed to export a new dmabuf heap.
 */
struct dma_heap_export_info {
	const char *name;
	const struct dma_heap_ops *ops;
	void *priv;
};

/**
 * dma_heap_get_drvdata() - get per-heap driver data
 * @heap: DMA-Heap to retrieve private data for
 *
 * Returns:
 * The per-heap data for the heap.
 */
void *dma_heap_get_drvdata(struct dma_heap *heap);

/**
 * dma_heap_get_name() - get heap name
 * @heap: DMA-Heap to ret