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