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851a645e FK |
1 | /* |
2 | * Copyright 2016-2017 Advanced Micro Devices, Inc. | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
20 | * OTHER DEALINGS IN THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include <linux/debugfs.h> | |
a29ec470 SL |
24 | #include <linux/uaccess.h> |
25 | ||
851a645e FK |
26 | #include "kfd_priv.h" |
27 | ||
28 | static struct dentry *debugfs_root; | |
29 | ||
30 | static int kfd_debugfs_open(struct inode *inode, struct file *file) | |
31 | { | |
32 | int (*show)(struct seq_file *, void *) = inode->i_private; | |
33 | ||
34 | return single_open(file, show, NULL); | |
35 | } | |
d7361021 QH |
36 | static int kfd_debugfs_hang_hws_read(struct seq_file *m, void *data) |
37 | { | |
38 | seq_printf(m, "echo gpu_id > hang_hws\n"); | |
39 | return 0; | |
40 | } | |
851a645e | 41 | |
a29ec470 SL |
42 | static ssize_t kfd_debugfs_hang_hws_write(struct file *file, |
43 | const char __user *user_buf, size_t size, loff_t *ppos) | |
44 | { | |
45 | struct kfd_dev *dev; | |
46 | char tmp[16]; | |
47 | uint32_t gpu_id; | |
48 | int ret = -EINVAL; | |
49 | ||
50 | memset(tmp, 0, 16); | |
51 | if (size >= 16) { | |
52 | pr_err("Invalid input for gpu id.\n"); | |
53 | goto out; | |
54 | } | |
55 | if (copy_from_user(tmp, user_buf, size)) { | |
56 | ret = -EFAULT; | |
57 | goto out; | |
58 | } | |
59 | if (kstrtoint(tmp, 10, &gpu_id)) { | |
60 | pr_err("Invalid input for gpu id.\n"); | |
61 | goto out; | |
62 | } | |
63 | dev = kfd_device_by_id(gpu_id); | |
64 | if (dev) { | |
65 | kfd_debugfs_hang_hws(dev); | |
66 | ret = size; | |
67 | } else | |
68 | pr_err("Cannot find device %d.\n", gpu_id); | |
69 | ||
70 | out: | |
71 | return ret; | |
72 | } | |
73 | ||
851a645e FK |
74 | static const struct file_operations kfd_debugfs_fops = { |
75 | .owner = THIS_MODULE, | |
76 | .open = kfd_debugfs_open, | |
77 | .read = seq_read, | |
78 | .llseek = seq_lseek, | |
79 | .release = single_release, | |
80 | }; | |
81 | ||
a29ec470 SL |
82 | static const struct file_operations kfd_debugfs_hang_hws_fops = { |
83 | .owner = THIS_MODULE, | |
84 | .open = kfd_debugfs_open, | |
85 | .read = seq_read, | |
86 | .write = kfd_debugfs_hang_hws_write, | |
87 | .llseek = seq_lseek, | |
88 | .release = single_release, | |
89 | }; | |
90 | ||
851a645e FK |
91 | void kfd_debugfs_init(void) |
92 | { | |
851a645e | 93 | debugfs_root = debugfs_create_dir("kfd", NULL); |
a29ec470 | 94 | |
641d3003 GKH |
95 | debugfs_create_file("mqds", S_IFREG | 0444, debugfs_root, |
96 | kfd_debugfs_mqds_by_process, &kfd_debugfs_fops); | |
97 | debugfs_create_file("hqds", S_IFREG | 0444, debugfs_root, | |
98 | kfd_debugfs_hqds_by_device, &kfd_debugfs_fops); | |
99 | debugfs_create_file("rls", S_IFREG | 0444, debugfs_root, | |
100 | kfd_debugfs_rls_by_device, &kfd_debugfs_fops); | |
2bdac179 | 101 | debugfs_create_file("hang_hws", S_IFREG | 0200, debugfs_root, |
d7361021 | 102 | kfd_debugfs_hang_hws_read, &kfd_debugfs_hang_hws_fops); |
851a645e FK |
103 | } |
104 | ||
105 | void kfd_debugfs_fini(void) | |
106 | { | |
107 | debugfs_remove_recursive(debugfs_root); | |
108 | } |