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/*
* drivers/staging/android/uapi/ion.h
*
* Copyright (C) 2011 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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 _UAPI_LINUX_ION_TEST_H
#define _UAPI_LINUX_ION_TEST_H
#include <linux/ioctl.h>
#include <linux/types.h>
typedef int ion_user_handle_t;
/**
* struct ion_test_rw_data - metadata passed to the kernel to read handle
* @ptr: a pointer to an area at least as large as size
* @offset: offset into the ion buffer to start reading
* @size: size to read or write
* @write: 1 to write, 0 to read
*/
struct ion_test_rw_data {
__u64 ptr;
__u64 offset;
__u64 size;
int write;
};
#define ION_IOC_MAGIC 'I'
/**
* DOC: ION_IOC_TEST_SET_DMA_BUF - attach a dma buf to the test driver
*
* Attaches a dma buf fd to the test driver. Passing a second fd or -1 will
* release the first fd.
*/
#define ION_IOC_TEST_SET_FD \
_IO(ION_IOC_MAGIC, 0xf0)
/**
* DOC: ION_IOC_TEST_DMA_MAPPING - read or write memory from a handle as DMA
*
* Reads or writes the memory from a handle using an uncached mapping. Can be
* used by unit tests to emulate a DMA engine as close as possible. Only
* expected to be used for debugging and testing, may not always be available.
*/
#define ION_IOC_TEST_DMA_MAPPING \
_IOW(ION_IOC_MAGIC, 0xf1, struct ion_test_rw_data)
/**
* DOC: ION_IOC_TEST_KERNEL_MAPPING - read or write memory from a handle
*
* Reads or writes the memory from a handle using a kernel mapping. Can be
* used by unit tests to test heap map_kernel functions. Only expected to be
* used for debugging and testing, may not always be available.
*/
#define ION_IOC_TEST_KERNEL_MAPPING \
_IOW(ION_IOC_MAGIC, 0xf2, struct ion_test_rw_data)
#endif /* _UAPI_LINUX_ION_H */
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