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2202844e LL |
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 | ||
12 | static struct dentry *vfio_debugfs_root; | |
13 | ||
14 | static 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 | ||
61 | void vfio_device_debugfs_init(struct vfio_device *vdev) | |
62 | { | |
63 | struct device *dev = &vdev->device; | |
64 | ||
65 | vdev->debug_root = debugfs_create_dir(dev_name(vdev->dev), | |
66 | vfio_debugfs_root); | |
67 | ||
68 | if (vdev->mig_ops) { | |
69 | struct dentry *vfio_dev_migration = NULL; | |
70 | ||
71 | vfio_dev_migration = debugfs_create_dir("migration", | |
72 | vdev->debug_root); | |
73 | debugfs_create_devm_seqfile(dev, "state", vfio_dev_migration, | |
74 | vfio_device_state_read); | |
75 | } | |
76 | } | |
77 | ||
78 | void vfio_device_debugfs_exit(struct vfio_device *vdev) | |
79 | { | |
80 | debugfs_remove_recursive(vdev->debug_root); | |
81 | } | |
82 | ||
83 | void vfio_debugfs_create_root(void) | |
84 | { | |
85 | vfio_debugfs_root = debugfs_create_dir("vfio", NULL); | |
86 | } | |
87 | ||
88 | void vfio_debugfs_remove_root(void) | |
89 | { | |
90 | debugfs_remove_recursive(vfio_debugfs_root); | |
91 | vfio_debugfs_root = NULL; | |
92 | } |