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
28 static struct dentry *debugfs_root;
29
kfd_debugfs_open(struct inode * inode,struct file * file)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 }
kfd_debugfs_hang_hws_read(struct seq_file * m,void * data)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 }
41
kfd_debugfs_hang_hws_write(struct file * file,const char __user * user_buf,size_t size,loff_t * ppos)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
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
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
kfd_debugfs_init(void)91 void kfd_debugfs_init(void)
92 {
93 debugfs_root = debugfs_create_dir("kfd", NULL);
94
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);
101 debugfs_create_file("hang_hws", S_IFREG | 0200, debugfs_root,
102 kfd_debugfs_hang_hws_read, &kfd_debugfs_hang_hws_fops);
103 }
104
kfd_debugfs_fini(void)105 void kfd_debugfs_fini(void)
106 {
107 debugfs_remove_recursive(debugfs_root);
108 }
109