1/*
2 * drivers/staging/android/uapi/ashmem.h
3 *
4 * Copyright 2008 Google Inc.
5 * Author: Robert Love
6 *
7 * This file is dual licensed.  It may be redistributed and/or modified
8 * under the terms of the Apache 2.0 License OR version 2 of the GNU
9 * General Public License.
10 */
11
12#ifndef _UAPI_LINUX_ASHMEM_H
13#define _UAPI_LINUX_ASHMEM_H
14
15#include <linux/ioctl.h>
16
17#define ASHMEM_NAME_LEN		256
18
19#define ASHMEM_NAME_DEF		"dev/ashmem"
20
21/* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
22#define ASHMEM_NOT_PURGED	0
23#define ASHMEM_WAS_PURGED	1
24
25/* Return values from ASHMEM_GET_PIN_STATUS: Is the mapping pinned? */
26#define ASHMEM_IS_UNPINNED	0
27#define ASHMEM_IS_PINNED	1
28
29struct ashmem_pin {
30	__u32 offset;	/* offset into region, in bytes, page-aligned */
31	__u32 len;	/* length forward from offset, in bytes, page-aligned */
32};
33
34#define __ASHMEMIOC		0x77
35
36#define ASHMEM_SET_NAME		_IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN])
37#define ASHMEM_GET_NAME		_IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN])
38#define ASHMEM_SET_SIZE		_IOW(__ASHMEMIOC, 3, size_t)
39#define ASHMEM_GET_SIZE		_IO(__ASHMEMIOC, 4)
40#define ASHMEM_SET_PROT_MASK	_IOW(__ASHMEMIOC, 5, unsigned long)
41#define ASHMEM_GET_PROT_MASK	_IO(__ASHMEMIOC, 6)
42#define ASHMEM_PIN		_IOW(__ASHMEMIOC, 7, struct ashmem_pin)
43#define ASHMEM_UNPIN		_IOW(__ASHMEMIOC, 8, struct ashmem_pin)
44#define ASHMEM_GET_PIN_STATUS	_IO(__ASHMEMIOC, 9)
45#define ASHMEM_PURGE_ALL_CACHES	_IO(__ASHMEMIOC, 10)
46
47#endif	/* _UAPI_LINUX_ASHMEM_H */
48