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1// SPDX-License-Identifier: GPL-2.0 OR MIT2/*3 * Copyright 2016-2022 Advanced Micro Devices, Inc.4 *5 * Permission is hereby granted, free of charge, to any person obtaining a6 * copy of this software and associated documentation files (the "Software"),7 * to deal in the Software without restriction, including without limitation8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,9 * and/or sell copies of the Software, and to permit persons to whom the10 * Software is furnished to do so, subject to the following conditions:11 *12 * The above copyright notice and this permission notice shall be included in13 * all copies or substantial portions of the Software.14 *15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR21 * OTHER DEALINGS IN THE SOFTWARE.22 */23 24#include <linux/debugfs.h>25#include <linux/uaccess.h>26 27#include "kfd_priv.h"28 29static struct dentry *debugfs_root;30 31static int kfd_debugfs_open(struct inode *inode, struct file *file)32{33 int (*show)(struct seq_file *, void *) = inode->i_private;34 35 return single_open(file, show, NULL);36}37static int kfd_debugfs_hang_hws_read(struct seq_file *m, void *data)38{39 seq_puts(m, "echo gpu_id > hang_hws\n");40 return 0;41}42 43static ssize_t kfd_debugfs_hang_hws_write(struct file *file,44 const char __user *user_buf, size_t size, loff_t *ppos)45{46 struct kfd_node *dev;47 char tmp[16];48 uint32_t gpu_id;49 int ret = -EINVAL;50 51 memset(tmp, 0, 16);52 if (size >= 16) {53 pr_err("Invalid input for gpu id.\n");54 goto out;55 }56 if (copy_from_user(tmp, user_buf, size)) {57 ret = -EFAULT;58 goto out;59 }60 if (kstrtoint(tmp, 10, &gpu_id)) {61 pr_err("Invalid input for gpu id.\n");62 goto out;63 }64 dev = kfd_device_by_id(gpu_id);65 if (dev) {66 kfd_debugfs_hang_hws(dev);67 ret = size;68 } else69 pr_err("Cannot find device %d.\n", gpu_id);70 71out:72 return ret;73}74 75static const struct file_operations kfd_debugfs_fops = {76 .owner = THIS_MODULE,77 .open = kfd_debugfs_open,78 .read = seq_read,79 .llseek = seq_lseek,80 .release = single_release,81};82 83static const struct file_operations kfd_debugfs_hang_hws_fops = {84 .owner = THIS_MODULE,85 .open = kfd_debugfs_open,86 .read = seq_read,87 .write = kfd_debugfs_hang_hws_write,88 .llseek = seq_lseek,89 .release = single_release,90};91 92void kfd_debugfs_init(void)93{94 debugfs_root = debugfs_create_dir("kfd", NULL);95 96 debugfs_create_file("mqds", S_IFREG | 0444, debugfs_root,97 kfd_debugfs_mqds_by_process, &kfd_debugfs_fops);98 debugfs_create_file("hqds", S_IFREG | 0444, debugfs_root,99 kfd_debugfs_hqds_by_device, &kfd_debugfs_fops);100 debugfs_create_file("rls", S_IFREG | 0444, debugfs_root,101 kfd_debugfs_rls_by_device, &kfd_debugfs_fops);102 debugfs_create_file("hang_hws", S_IFREG | 0200, debugfs_root,103 kfd_debugfs_hang_hws_read, &kfd_debugfs_hang_hws_fops);104 debugfs_create_file("mem_limit", S_IFREG | 0200, debugfs_root,105 kfd_debugfs_kfd_mem_limits, &kfd_debugfs_fops);106}107 108void kfd_debugfs_fini(void)109{110 debugfs_remove_recursive(debugfs_root);111}112