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>
24#include <linux/uaccess.h>
25
26#include "kfd_priv.h"
27
28static struct dentry *debugfs_root;
29
30static 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}
36
37static ssize_t kfd_debugfs_hang_hws_write(struct file *file,
38 const char __user *user_buf, size_t size, loff_t *ppos)
39{
40 struct kfd_dev *dev;
41 char tmp[16];
42 uint32_t gpu_id;
43 int ret = -EINVAL;
44
45 memset(tmp, 0, 16);
46 if (size >= 16) {
47 pr_err("Invalid input for gpu id.\n");
48 goto out;
49 }
50 if (copy_from_user(tmp, user_buf, size)) {
51 ret = -EFAULT;
52 goto out;
53 }
54 if (kstrtoint(tmp, 10, &gpu_id)) {
55 pr_err("Invalid input for gpu id.\n");
56 goto out;
57 }
58 dev = kfd_device_by_id(gpu_id);
59 if (dev) {
60 kfd_debugfs_hang_hws(dev);
61 ret = size;
62 } else
63 pr_err("Cannot find device %d.\n", gpu_id);
64
65out:
66 return ret;
67}
68
69static const struct file_operations kfd_debugfs_fops = {
70 .owner = THIS_MODULE,
71 .open = kfd_debugfs_open,
72 .read = seq_read,
73 .llseek = seq_lseek,
74 .release = single_release,
75};
76
77static const struct file_operations kfd_debugfs_hang_hws_fops = {
78 .owner = THIS_MODULE,
79 .open = kfd_debugfs_open,
80 .read = seq_read,
81 .write = kfd_debugfs_hang_hws_write,
82 .llseek = seq_lseek,
83 .release = single_release,
84};
85
86void kfd_debugfs_init(void)
87{
88 struct dentry *ent;
89
90 debugfs_root = debugfs_create_dir("kfd", NULL);
91 if (!debugfs_root || debugfs_root == ERR_PTR(-ENODEV)) {
92 pr_warn("Failed to create kfd debugfs dir\n");
93 return;
94 }
95
96 ent = debugfs_create_file("mqds", S_IFREG | 0444, debugfs_root,
97 kfd_debugfs_mqds_by_process,
98 &kfd_debugfs_fops);
99 if (!ent)
100 pr_warn("Failed to create mqds in kfd debugfs\n");
101
102 ent = debugfs_create_file("hqds", S_IFREG | 0444, debugfs_root,
103 kfd_debugfs_hqds_by_device,
104 &kfd_debugfs_fops);
105 if (!ent)
106 pr_warn("Failed to create hqds in kfd debugfs\n");
107
108 ent = debugfs_create_file("rls", S_IFREG | 0444, debugfs_root,
109 kfd_debugfs_rls_by_device,
110 &kfd_debugfs_fops);
111
112 ent = debugfs_create_file("hang_hws", S_IFREG | 0644, debugfs_root,
113 NULL,
114 &kfd_debugfs_hang_hws_fops);
115
116 if (!ent)
117 pr_warn("Failed to create rls in kfd debugfs\n");
118}
119
120void kfd_debugfs_fini(void)
121{
122 debugfs_remove_recursive(debugfs_root);
123}
124