projects/linux·blob master · refs

112 lines · 2.7 KiB

1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2023, HiSilicon Ltd.
4 */
5
6#include <linux/device.h>
7#include <linux/debugfs.h>
8#include <linux/seq_file.h>
9#include <linux/vfio.h>
10#include "vfio.h"
11
12static struct dentry *vfio_debugfs_root;
13
14static int vfio_device_state_read(struct seq_file *seq, void *data)
15{
16 struct device *vf_dev = seq->private;
17 struct vfio_device *vdev = container_of(vf_dev,
18 struct vfio_device, device);
19 enum vfio_device_mig_state state;
20 int ret;
21
22 BUILD_BUG_ON(VFIO_DEVICE_STATE_NR !=
23 VFIO_DEVICE_STATE_PRE_COPY_P2P + 1);
24
25 ret = vdev->mig_ops->migration_get_state(vdev, &state);
26 if (ret)
27 return -EINVAL;
28
29 switch (state) {
30 case VFIO_DEVICE_STATE_ERROR:
31 seq_puts(seq, "ERROR\n");
32 break;
33 case VFIO_DEVICE_STATE_STOP:
34 seq_puts(seq, "STOP\n");
35 break;
36 case VFIO_DEVICE_STATE_RUNNING:
37 seq_puts(seq, "RUNNING\n");
38 break;
39 case VFIO_DEVICE_STATE_STOP_COPY:
40 seq_puts(seq, "STOP_COPY\n");
41 break;
42 case VFIO_DEVICE_STATE_RESUMING:
43 seq_puts(seq, "RESUMING\n");
44 break;
45 case VFIO_DEVICE_STATE_RUNNING_P2P:
46 seq_puts(seq, "RUNNING_P2P\n");
47 break;
48 case VFIO_DEVICE_STATE_PRE_COPY:
49 seq_puts(seq, "PRE_COPY\n");
50 break;
51 case VFIO_DEVICE_STATE_PRE_COPY_P2P:
52 seq_puts(seq, "PRE_COPY_P2P\n");
53 break;
54 default:
55 seq_puts(seq, "Invalid\n");
56 }
57
58 return 0;
59}
60
61static int vfio_device_features_read(struct seq_file *seq, void *data)
62{
63 struct device *vf_dev = seq->private;
64 struct vfio_device *vdev = container_of(vf_dev, struct vfio_device, device);
65
66 if (vdev->migration_flags & VFIO_MIGRATION_STOP_COPY)
67 seq_puts(seq, "stop-copy\n");
68 if (vdev->migration_flags & VFIO_MIGRATION_P2P)
69 seq_puts(seq, "p2p\n");
70 if (vdev->migration_flags & VFIO_MIGRATION_PRE_COPY)
71 seq_puts(seq, "pre-copy\n");
72 if (vdev->log_ops)
73 seq_puts(seq, "dirty-tracking\n");
74
75 return 0;
76}
77
78void vfio_device_debugfs_init(struct vfio_device *vdev)
79{
80 struct device *dev = &vdev->device;
81
82 vdev->debug_root = debugfs_create_dir(dev_name(vdev->dev),
83 vfio_debugfs_root);
84
85 if (vdev->mig_ops) {
86 struct dentry *vfio_dev_migration = NULL;
87
88 vfio_dev_migration = debugfs_create_dir("migration",
89 vdev->debug_root);
90 debugfs_create_devm_seqfile(dev, "state", vfio_dev_migration,
91 vfio_device_state_read);
92 debugfs_create_devm_seqfile(dev, "features", vfio_dev_migration,
93 vfio_device_features_read);
94 }
95}
96
97void vfio_device_debugfs_exit(struct vfio_device *vdev)
98{
99 debugfs_remove_recursive(vdev->debug_root);
100 vdev->debug_root = NULL;
101}
102
103void vfio_debugfs_create_root(void)
104{
105 vfio_debugfs_root = debugfs_create_dir("vfio", NULL);
106}
107
108void vfio_debugfs_remove_root(void)
109{
110 debugfs_remove_recursive(vfio_debugfs_root);
111 vfio_debugfs_root = NULL;
112}