1 /* SPDX-License-Identifier: GPL-2.0 OR Apache-2.0 */
3 * drivers/staging/android/uapi/ashmem.h
5 * Copyright 2008 Google Inc.
9 #ifndef _UAPI_LINUX_ASHMEM_H
10 #define _UAPI_LINUX_ASHMEM_H
12 #include <linux/ioctl.h>
13 #include <linux/types.h>
15 #define ASHMEM_NAME_LEN 256
17 #define ASHMEM_NAME_DEF "dev/ashmem"
19 /* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
20 #define ASHMEM_NOT_PURGED 0
21 #define ASHMEM_WAS_PURGED 1
23 /* Return values from ASHMEM_GET_PIN_STATUS: Is the mapping pinned? */
24 #define ASHMEM_IS_UNPINNED 0
25 #define ASHMEM_IS_PINNED 1
28 __u32 offset; /* offset into region, in bytes, page-aligned */
29 __u32 len; /* length forward from offset, in bytes, page-aligned */
32 #define __ASHMEMIOC 0x77
34 #define ASHMEM_SET_NAME _IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN])
35 #define ASHMEM_GET_NAME _IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN])
36 #define ASHMEM_SET_SIZE _IOW(__ASHMEMIOC, 3, size_t)
37 #define ASHMEM_GET_SIZE _IO(__ASHMEMIOC, 4)
38 #define ASHMEM_SET_PROT_MASK _IOW(__ASHMEMIOC, 5, unsigned long)
39 #define ASHMEM_GET_PROT_MASK _IO(__ASHMEMIOC, 6)
40 #define ASHMEM_PIN _IOW(__ASHMEMIOC, 7, struct ashmem_pin)
41 #define ASHMEM_UNPIN _IOW(__ASHMEMIOC, 8, struct ashmem_pin)
42 #define ASHMEM_GET_PIN_STATUS _IO(__ASHMEMIOC, 9)
43 #define ASHMEM_PURGE_ALL_CACHES _IO(__ASHMEMIOC, 10)
45 #endif /* _UAPI_LINUX_ASHMEM_H */