ion_test.h revision ceff95d49cc3e28c06c2352e8d94f56046271aeb 
1/*
2 * drivers/staging/android/uapi/ion.h
3 *
4 * Copyright (C) 2011 Google, Inc.
5 *
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 */
16
17#ifndef _UAPI_LINUX_ION_TEST_H
18#define _UAPI_LINUX_ION_TEST_H
19
20#include <linux/ioctl.h>
21#include <linux/types.h>
22
23typedef int ion_user_handle_t;
24
25/**
26 * struct ion_test_rw_data - metadata passed to the kernel to read handle
27 * @ptr:	a pointer to an area at least as large as size
28 * @offset:	offset into the ion buffer to start reading
29 * @size:	size to read or write
30 * @write:	1 to write, 0 to read
31 */
32struct ion_test_rw_data {
33	__u64 ptr;
34	__u64 offset;
35	__u64 size;
36	int write;
37};
38
39#define ION_IOC_MAGIC		'I'
40
41/**
42 * DOC: ION_IOC_TEST_SET_DMA_BUF - attach a dma buf to the test driver
43 *
44 * Attaches a dma buf fd to the test driver.  Passing a second fd or -1 will
45 * release the first fd.
46 */
47#define ION_IOC_TEST_SET_FD \
48			_IO(ION_IOC_MAGIC, 0xf0)
49
50/**
51 * DOC: ION_IOC_TEST_DMA_MAPPING - read or write memory from a handle as DMA
52 *
53 * Reads or writes the memory from a handle using an uncached mapping.  Can be
54 * used by unit tests to emulate a DMA engine as close as possible.  Only
55 * expected to be used for debugging and testing, may not always be available.
56 */
57#define ION_IOC_TEST_DMA_MAPPING \
58			_IOW(ION_IOC_MAGIC, 0xf1, struct ion_test_rw_data)
59
60/**
61 * DOC: ION_IOC_TEST_KERNEL_MAPPING - read or write memory from a handle
62 *
63 * Reads or writes the memory from a handle using a kernel mapping.  Can be
64 * used by unit tests to test heap map_kernel functions.  Only expected to be
65 * used for debugging and testing, may not always be available.
66 */
67#define ION_IOC_TEST_KERNEL_MAPPING \
68			_IOW(ION_IOC_MAGIC, 0xf2, struct ion_test_rw_data)
69
70
71#endif /* _UAPI_LINUX_ION_H */
72