1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3 * Berkeley style UIO structures - Alan Cox 1994.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.
9 */
10 #ifndef _UAPI__LINUX_UIO_H
11 #define _UAPI__LINUX_UIO_H
12
13 #include <linux/compiler.h>
14 #include <linux/types.h>
15
16
17 struct iovec
18 {
19 void __user *iov_base; /* BSD uses caddr_t (1003.1g requires void *) */
20 __kernel_size_t iov_len; /* Must be size_t (1003.1g) */
21 };
22
23 struct dmabuf_cmsg {
24 __u64 frag_offset; /* offset into the dmabuf where the frag starts.
25 */
26 __u32 frag_size; /* size of the frag. */
27 __u32 frag_token; /* token representing this frag for
28 * DEVMEM_DONTNEED.
29 */
30 __u32 dmabuf_id; /* dmabuf id this frag belongs to. */
31 __u32 flags; /* Currently unused. Reserved for future
32 * uses.
33 */
34 };
35
36 struct dmabuf_token {
37 __u32 token_start;
38 __u32 token_count;
39 };
40
41 /*
42 * UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1)
43 */
44
45 #define UIO_FASTIOV 8
46 #define UIO_MAXIOV 1024
47
48
49 #endif /* _UAPI__LINUX_UIO_H */
50
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