50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* Berkeley style UIO structures - Alan Cox 1994.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _UAPI__LINUX_UIO_H
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#define _UAPI__LINUX_UIO_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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struct iovec
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{
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void __user *iov_base; /* BSD uses caddr_t (1003.1g requires void *) */
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__kernel_size_t iov_len; /* Must be size_t (1003.1g) */
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};
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struct dmabuf_cmsg {
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__u64 frag_offset; /* offset into the dmabuf where the frag starts.
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*/
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__u32 frag_size; /* size of the frag. */
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__u32 frag_token; /* token representing this frag for
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* DEVMEM_DONTNEED.
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*/
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__u32 dmabuf_id; /* dmabuf id this frag belongs to. */
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__u32 flags; /* Currently unused. Reserved for future
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* uses.
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*/
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};
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struct dmabuf_token {
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__u32 token_start;
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__u32 token_count;
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};
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/*
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* UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1)
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*/
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#define UIO_FASTIOV 8
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#define UIO_MAXIOV 1024
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#endif /* _UAPI__LINUX_UIO_H */
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