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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES
*/
#include <linux/vfio.h>
#include <linux/iommufd.h>
#include "vfio.h"
MODULE_IMPORT_NS(IOMMUFD);
MODULE_IMPORT_NS(IOMMUFD_VFIO);
int vfio_iommufd_bind(struct vfio_device *vdev, struct iommufd_ctx *ictx)
{
u32 ioas_id;
u32 device_id;
int ret;
lockdep_assert_held(&vdev->dev_set->lock);
/*
* If the driver doesn't provide this op then it means the device does
* not do DMA at all. So nothing to do.
*/
if (!vdev->ops->bind_iommufd)
return 0;
ret = vdev->ops->bind_iommufd(vdev, ictx, &device_id);
if (ret)
return ret;
ret = iommufd_vfio_compat_ioas_id(ictx, &ioas_id);
if (ret)
goto err_unbind;
ret = vdev->ops->attach_ioas(vdev, &ioas_id);
if (ret)
goto err_unbind;
/*
* The legacy path has no way to return the device id or the selected
* pt_id
*/
return 0;
err_unbind:
if (vdev->ops->unbind_iommufd)
vdev->ops->unbind_iommufd(vdev);
return ret;
}
void vfio_iommufd_unbind(struct vfio_device *vdev)
{
lockdep_assert_held(&vdev->dev_set->lock);
if (vdev->ops->unbind_iommufd)
vdev->ops->unbind_iommufd(vdev);
}
/*
* The physical standard ops mean that the iommufd_device is bound to the
* physical device vdev->dev that was provided to vfio_init_group_dev(). Drivers
* using this ops set should call vfio_register_group_dev()
*/
int vfio_iommufd_physical_bind(struct vfio_device *vdev,
struct iommufd_ctx *ictx, u32 *out_device_id)
{
struct iommufd_device *idev;
idev = iommufd_device_bind(ictx, vdev->dev, out_device_id);
if (IS_ERR(idev))
return PTR_ERR(idev);
vdev->iommufd_device = idev;
return 0;
}
EXPORT_SYMBOL_GPL(vfio_iommufd_physical_bind);
void vfio_iommufd_physical_unbind(struct vfio_device *vdev)
{
lockdep_assert_held(&vdev->dev_set->lock);
if (vdev->iommufd_attached) {
iommufd_device_detach(vdev->iommufd_device);
vdev->iommufd_attached = false;
}
iommufd_device_unbind(vdev->iommufd_device);
vdev->iommufd_device = NULL;
}
EXPORT_SYMBOL_GPL(vfio_iommufd_physical_unbind);
int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id)
{
int rc;
rc = iommufd_device_attach(vdev->iommufd_device, pt_id);
if (rc)
return rc;
vdev->iommufd_attached = true;
return 0;
}
EXPORT_SYMBOL_GPL(vfio_iommufd_physical_attach_ioas);
|
