67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/* 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/device.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;
|
|
};
|
|
|
|
void *dma_heap_get_drvdata(struct dma_heap *heap);
|
|
|
|
const char *dma_heap_get_name(struct dma_heap *heap);
|
|
|
|
struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info);
|
|
|
|
#ifdef CONFIG_DMABUF_HEAPS_CMA
|
|
/**
|
|
* dma_heap_add_cma - adds a device CMA heap to dmabuf heaps
|
|
* @dev: device with a CMA heap to register
|
|
*/
|
|
int dma_heap_add_cma(struct device *dev);
|
|
|
|
#endif /* CONFIG_DMABUF_HEAPS_CMA */
|
|
struct dma_heap *dma_heap_find(const char *name);
|
|
|
|
void dma_heap_put(struct dma_heap *heap);
|
|
|
|
struct dma_buf *dma_heap_buffer_alloc(struct dma_heap *heap, size_t len,
|
|
unsigned int fd_flags,
|
|
unsigned int heap_flags);
|
|
|
|
#endif /* _DMA_HEAPS_H */
|