blob: 37de92f0534b8649f153662f6f4886cfdf6af196 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES.
*/
#ifndef _UAPI_IOMMUFD_H
#define _UAPI_IOMMUFD_H
#include <linux/types.h>
#include <linux/ioctl.h>
#define IOMMUFD_TYPE (';')
/**
* DOC: General ioctl format
*
* The ioctl interface follows a general format to allow for extensibility. Each
* ioctl is passed in a structure pointer as the argument providing the size of
* the structure in the first u32. The kernel checks that any structure space
* beyond what it understands is 0. This allows userspace to use the backward
* compatible portion while consistently using the newer, larger, structures.
*
* ioctls use a standard meaning for common errnos:
*
* - ENOTTY: The IOCTL number itself is not supported at all
* - E2BIG: The IOCTL number is supported, but the provided structure has
* non-zero in a part the kernel does not understand.
* - EOPNOTSUPP: The IOCTL number is supported, and the structure is
* understood, however a known field has a value the kernel does not
* understand or support.
* - EINVAL: Everything about the IOCTL was understood, but a field is not
* correct.
* - ENOENT: An ID or IOVA provided does not exist.
* - ENOMEM: Out of memory.
* - EOVERFLOW: Mathematics overflowed.
*
* As well as additional errnos, within specific ioctls.
*/
enum {
IOMMUFD_CMD_BASE = 0x80,
IOMMUFD_CMD_DESTROY = IOMMUFD_CMD_BASE,
};
/**
* struct iommu_destroy - ioctl(IOMMU_DESTROY)
* @size: sizeof(struct iommu_destroy)
* @id: iommufd object ID to destroy. Can by any destroyable object type.
*
* Destroy any object held within iommufd.
*/
struct iommu_destroy {
__u32 size;
__u32 id;
};
#define IOMMU_DESTROY _IO(IOMMUFD_TYPE, IOMMUFD_CMD_DESTROY)
#endif
|
