124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
/*
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* Copyright 2016-2017 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/debugfs.h>
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#include <linux/uaccess.h>
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#include "kfd_priv.h"
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static struct dentry *debugfs_root;
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static int kfd_debugfs_open(struct inode *inode, struct file *file)
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{
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int (*show)(struct seq_file *, void *) = inode->i_private;
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return single_open(file, show, NULL);
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}
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static ssize_t kfd_debugfs_hang_hws_write(struct file *file,
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const char __user *user_buf, size_t size, loff_t *ppos)
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{
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struct kfd_dev *dev;
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char tmp[16];
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uint32_t gpu_id;
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int ret = -EINVAL;
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memset(tmp, 0, 16);
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if (size >= 16) {
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pr_err("Invalid input for gpu id.\n");
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goto out;
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}
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if (copy_from_user(tmp, user_buf, size)) {
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ret = -EFAULT;
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goto out;
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}
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if (kstrtoint(tmp, 10, &gpu_id)) {
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pr_err("Invalid input for gpu id.\n");
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goto out;
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}
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dev = kfd_device_by_id(gpu_id);
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if (dev) {
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kfd_debugfs_hang_hws(dev);
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ret = size;
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} else
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pr_err("Cannot find device %d.\n", gpu_id);
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out:
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return ret;
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}
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static const struct file_operations kfd_debugfs_fops = {
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.owner = THIS_MODULE,
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.open = kfd_debugfs_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations kfd_debugfs_hang_hws_fops = {
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.owner = THIS_MODULE,
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.open = kfd_debugfs_open,
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.read = seq_read,
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.write = kfd_debugfs_hang_hws_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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void kfd_debugfs_init(void)
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{
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struct dentry *ent;
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debugfs_root = debugfs_create_dir("kfd", NULL);
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if (!debugfs_root || debugfs_root == ERR_PTR(-ENODEV)) {
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pr_warn("Failed to create kfd debugfs dir\n");
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return;
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}
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ent = debugfs_create_file("mqds", S_IFREG | 0444, debugfs_root,
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kfd_debugfs_mqds_by_process,
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&kfd_debugfs_fops);
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if (!ent)
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pr_warn("Failed to create mqds in kfd debugfs\n");
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ent = debugfs_create_file("hqds", S_IFREG | 0444, debugfs_root,
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kfd_debugfs_hqds_by_device,
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&kfd_debugfs_fops);
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if (!ent)
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pr_warn("Failed to create hqds in kfd debugfs\n");
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ent = debugfs_create_file("rls", S_IFREG | 0444, debugfs_root,
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kfd_debugfs_rls_by_device,
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&kfd_debugfs_fops);
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ent = debugfs_create_file("hang_hws", S_IFREG | 0644, debugfs_root,
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NULL,
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&kfd_debugfs_hang_hws_fops);
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if (!ent)
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pr_warn("Failed to create rls in kfd debugfs\n");
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}
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void kfd_debugfs_fini(void)
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{
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debugfs_remove_recursive(debugfs_root);
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}
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