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641d30035c
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Oded Gabbay <oded.gabbay@gmail.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: "Christian König" <christian.koenig@amd.com> Cc: "David (ChunMing) Zhou" <David1.Zhou@amd.com> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: dri-devel@lists.freedesktop.org Cc: amd-gfx@lists.freedesktop.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
103 lines
3 KiB
C
103 lines
3 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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debugfs_root = debugfs_create_dir("kfd", NULL);
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debugfs_create_file("mqds", S_IFREG | 0444, debugfs_root,
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kfd_debugfs_mqds_by_process, &kfd_debugfs_fops);
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debugfs_create_file("hqds", S_IFREG | 0444, debugfs_root,
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kfd_debugfs_hqds_by_device, &kfd_debugfs_fops);
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debugfs_create_file("rls", S_IFREG | 0444, debugfs_root,
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kfd_debugfs_rls_by_device, &kfd_debugfs_fops);
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debugfs_create_file("hang_hws", S_IFREG | 0644, debugfs_root,
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NULL, &kfd_debugfs_hang_hws_fops);
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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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