// SPDX-License-Identifier: GPL-2.0-only#include "edac_module.h" static struct dentry *edac_debugfs; static ssize_t edac_fake_inject_write(struct file *file,				      const char __user *data,				      size_t count, loff_t *ppos){	struct device *dev = file->private_data;	struct mem_ctl_info *mci = to_mci(dev);	static enum hw_event_mc_err_type type;	u16 errcount = mci->fake_inject_count; 	if (!errcount)		errcount = 1; 	type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED				   : HW_EVENT_ERR_CORRECTED; 	printk(KERN_DEBUG	       "Generating %d %s fake error%s to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n",		errcount,		(type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE",		errcount > 1 ? "s" : "",		mci->fake_inject_layer[0],		mci->fake_inject_layer[1],		mci->fake_inject_layer[2]	       );	edac_mc_handle_error(type, mci, errcount, 0, 0, 0,			     mci->fake_inject_layer[0],			     mci->fake_inject_layer[1],			     mci->fake_inject_layer[2],			     "FAKE ERROR", "for EDAC testing only"); 	return count;} static const struct file_operations debug_fake_inject_fops = {	.open = simple_open,	.write = edac_fake_inject_write,	.llseek = generic_file_llseek,}; void __init edac_debugfs_init(void){	edac_debugfs = debugfs_create_dir("edac", NULL);} void edac_debugfs_exit(void){	debugfs_remove_recursive(edac_debugfs);} void edac_create_debugfs_nodes(struct mem_ctl_info *mci){	struct dentry *parent;	char name[80];	int i; 	parent = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs); 	for (i = 0; i < mci->n_layers; i++) {		sprintf(name, "fake_inject_%s",			     edac_layer_name[mci->layers[i].type]);		debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent,				  &mci->fake_inject_layer[i]);	} 	debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent,			    &mci->fake_inject_ue); 	debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent,			   &mci->fake_inject_count); 	debugfs_create_file("fake_inject", S_IWUSR, parent, &mci->dev,			    &debug_fake_inject_fops); 	mci->debugfs = parent;} /* Create a toplevel dir under EDAC's debugfs hierarchy */struct dentry *edac_debugfs_create_dir(const char *dirname){	if (!edac_debugfs)		return NULL; 	return debugfs_create_dir(dirname, edac_debugfs);}EXPORT_SYMBOL_GPL(edac_debugfs_create_dir); /* Create a toplevel dir under EDAC's debugfs hierarchy with parent @parent */struct dentry *edac_debugfs_create_dir_at(const char *dirname, struct dentry *parent){	return debugfs_create_dir(dirname, parent);}EXPORT_SYMBOL_GPL(edac_debugfs_create_dir_at); /* * Create a file under EDAC's hierarchy or a sub-hierarchy: * * @name: file name * @mode: file permissions * @parent: parent dentry. If NULL, it becomes the toplevel EDAC dir * @data: private data of caller * @fops: file operations of this file */struct dentry *edac_debugfs_create_file(const char *name, umode_t mode, struct dentry *parent,			 void *data, const struct file_operations *fops){	if (!parent)		parent = edac_debugfs; 	return debugfs_create_file(name, mode, parent, data, fops);}EXPORT_SYMBOL_GPL(edac_debugfs_create_file); /* Wrapper for debugfs_create_x8() */struct dentry *edac_debugfs_create_x8(const char *name, umode_t mode,				       struct dentry *parent, u8 *value){	if (!parent)		parent = edac_debugfs; 	return debugfs_create_x8(name, mode, parent, value);}EXPORT_SYMBOL_GPL(edac_debugfs_create_x8); /* Wrapper for debugfs_create_x16() */struct dentry *edac_debugfs_create_x16(const char *name, umode_t mode,				       struct dentry *parent, u16 *value){	if (!parent)		parent = edac_debugfs; 	return debugfs_create_x16(name, mode, parent, value);}EXPORT_SYMBOL_GPL(edac_debugfs_create_x16);