1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2016-2017 Advanced Micro Devices, Inc.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining a
5*4882a593Smuzhiyun * copy of this software and associated documentation files (the "Software"),
6*4882a593Smuzhiyun * to deal in the Software without restriction, including without limitation
7*4882a593Smuzhiyun * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8*4882a593Smuzhiyun * and/or sell copies of the Software, and to permit persons to whom the
9*4882a593Smuzhiyun * Software is furnished to do so, subject to the following conditions:
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * The above copyright notice and this permission notice shall be included in
12*4882a593Smuzhiyun * all copies or substantial portions of the Software.
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17*4882a593Smuzhiyun * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18*4882a593Smuzhiyun * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19*4882a593Smuzhiyun * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20*4882a593Smuzhiyun * OTHER DEALINGS IN THE SOFTWARE.
21*4882a593Smuzhiyun */
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #include <linux/debugfs.h>
24*4882a593Smuzhiyun #include <linux/uaccess.h>
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #include "kfd_priv.h"
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun static struct dentry *debugfs_root;
29*4882a593Smuzhiyun
kfd_debugfs_open(struct inode * inode,struct file * file)30*4882a593Smuzhiyun static int kfd_debugfs_open(struct inode *inode, struct file *file)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun int (*show)(struct seq_file *, void *) = inode->i_private;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun return single_open(file, show, NULL);
35*4882a593Smuzhiyun }
kfd_debugfs_hang_hws_read(struct seq_file * m,void * data)36*4882a593Smuzhiyun static int kfd_debugfs_hang_hws_read(struct seq_file *m, void *data)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun seq_printf(m, "echo gpu_id > hang_hws\n");
39*4882a593Smuzhiyun return 0;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
kfd_debugfs_hang_hws_write(struct file * file,const char __user * user_buf,size_t size,loff_t * ppos)42*4882a593Smuzhiyun static ssize_t kfd_debugfs_hang_hws_write(struct file *file,
43*4882a593Smuzhiyun const char __user *user_buf, size_t size, loff_t *ppos)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun struct kfd_dev *dev;
46*4882a593Smuzhiyun char tmp[16];
47*4882a593Smuzhiyun uint32_t gpu_id;
48*4882a593Smuzhiyun int ret = -EINVAL;
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun memset(tmp, 0, 16);
51*4882a593Smuzhiyun if (size >= 16) {
52*4882a593Smuzhiyun pr_err("Invalid input for gpu id.\n");
53*4882a593Smuzhiyun goto out;
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun if (copy_from_user(tmp, user_buf, size)) {
56*4882a593Smuzhiyun ret = -EFAULT;
57*4882a593Smuzhiyun goto out;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun if (kstrtoint(tmp, 10, &gpu_id)) {
60*4882a593Smuzhiyun pr_err("Invalid input for gpu id.\n");
61*4882a593Smuzhiyun goto out;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun dev = kfd_device_by_id(gpu_id);
64*4882a593Smuzhiyun if (dev) {
65*4882a593Smuzhiyun kfd_debugfs_hang_hws(dev);
66*4882a593Smuzhiyun ret = size;
67*4882a593Smuzhiyun } else
68*4882a593Smuzhiyun pr_err("Cannot find device %d.\n", gpu_id);
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun out:
71*4882a593Smuzhiyun return ret;
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun static const struct file_operations kfd_debugfs_fops = {
75*4882a593Smuzhiyun .owner = THIS_MODULE,
76*4882a593Smuzhiyun .open = kfd_debugfs_open,
77*4882a593Smuzhiyun .read = seq_read,
78*4882a593Smuzhiyun .llseek = seq_lseek,
79*4882a593Smuzhiyun .release = single_release,
80*4882a593Smuzhiyun };
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun static const struct file_operations kfd_debugfs_hang_hws_fops = {
83*4882a593Smuzhiyun .owner = THIS_MODULE,
84*4882a593Smuzhiyun .open = kfd_debugfs_open,
85*4882a593Smuzhiyun .read = seq_read,
86*4882a593Smuzhiyun .write = kfd_debugfs_hang_hws_write,
87*4882a593Smuzhiyun .llseek = seq_lseek,
88*4882a593Smuzhiyun .release = single_release,
89*4882a593Smuzhiyun };
90*4882a593Smuzhiyun
kfd_debugfs_init(void)91*4882a593Smuzhiyun void kfd_debugfs_init(void)
92*4882a593Smuzhiyun {
93*4882a593Smuzhiyun debugfs_root = debugfs_create_dir("kfd", NULL);
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun debugfs_create_file("mqds", S_IFREG | 0444, debugfs_root,
96*4882a593Smuzhiyun kfd_debugfs_mqds_by_process, &kfd_debugfs_fops);
97*4882a593Smuzhiyun debugfs_create_file("hqds", S_IFREG | 0444, debugfs_root,
98*4882a593Smuzhiyun kfd_debugfs_hqds_by_device, &kfd_debugfs_fops);
99*4882a593Smuzhiyun debugfs_create_file("rls", S_IFREG | 0444, debugfs_root,
100*4882a593Smuzhiyun kfd_debugfs_rls_by_device, &kfd_debugfs_fops);
101*4882a593Smuzhiyun debugfs_create_file("hang_hws", S_IFREG | 0200, debugfs_root,
102*4882a593Smuzhiyun kfd_debugfs_hang_hws_read, &kfd_debugfs_hang_hws_fops);
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun
kfd_debugfs_fini(void)105*4882a593Smuzhiyun void kfd_debugfs_fini(void)
106*4882a593Smuzhiyun {
107*4882a593Smuzhiyun debugfs_remove_recursive(debugfs_root);
108*4882a593Smuzhiyun }
109