1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c b/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c
new file mode 100644
index 000000000..4a5a0a4e0
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright 2016-2022 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
+
+#include "kfd_priv.h"
+
+static struct dentry *debugfs_root;
+
+static int kfd_debugfs_open(struct inode *inode, struct file *file)
+{
+	int (*show)(struct seq_file *, void *) = inode->i_private;
+
+	return single_open(file, show, NULL);
+}
+static int kfd_debugfs_hang_hws_read(struct seq_file *m, void *data)
+{
+	seq_puts(m, "echo gpu_id > hang_hws\n");
+	return 0;
+}
+
+static ssize_t kfd_debugfs_hang_hws_write(struct file *file,
+	const char __user *user_buf, size_t size, loff_t *ppos)
+{
+	struct kfd_node *dev;
+	char tmp[16];
+	uint32_t gpu_id;
+	int ret = -EINVAL;
+
+	memset(tmp, 0, 16);
+	if (size >= 16) {
+		pr_err("Invalid input for gpu id.\n");
+		goto out;
+	}
+	if (copy_from_user(tmp, user_buf, size)) {
+		ret = -EFAULT;
+		goto out;
+	}
+	if (kstrtoint(tmp, 10, &gpu_id)) {
+		pr_err("Invalid input for gpu id.\n");
+		goto out;
+	}
+	dev = kfd_device_by_id(gpu_id);
+	if (dev) {
+		kfd_debugfs_hang_hws(dev);
+		ret = size;
+	} else
+		pr_err("Cannot find device %d.\n", gpu_id);
+
+out:
+	return ret;
+}
+
+static const struct file_operations kfd_debugfs_fops = {
+	.owner = THIS_MODULE,
+	.open = kfd_debugfs_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static const struct file_operations kfd_debugfs_hang_hws_fops = {
+	.owner = THIS_MODULE,
+	.open = kfd_debugfs_open,
+	.read = seq_read,
+	.write = kfd_debugfs_hang_hws_write,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+void kfd_debugfs_init(void)
+{
+	debugfs_root = debugfs_create_dir("kfd", NULL);
+
+	debugfs_create_file("mqds", S_IFREG | 0444, debugfs_root,
+			    kfd_debugfs_mqds_by_process, &kfd_debugfs_fops);
+	debugfs_create_file("hqds", S_IFREG | 0444, debugfs_root,
+			    kfd_debugfs_hqds_by_device, &kfd_debugfs_fops);
+	debugfs_create_file("rls", S_IFREG | 0444, debugfs_root,
+			    kfd_debugfs_rls_by_device, &kfd_debugfs_fops);
+	debugfs_create_file("hang_hws", S_IFREG | 0200, debugfs_root,
+			    kfd_debugfs_hang_hws_read, &kfd_debugfs_hang_hws_fops);
+	debugfs_create_file("mem_limit", S_IFREG | 0200, debugfs_root,
+			    kfd_debugfs_kfd_mem_limits, &kfd_debugfs_fops);
+}
+
+void kfd_debugfs_fini(void)
+{
+	debugfs_remove_recursive(debugfs_root);
+}