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// 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() */
void edac_debugfs_create_x8(const char *name, umode_t mode,
struct dentry *parent, u8 *value)
{
if (!parent)
parent = edac_debugfs;
debugfs_create_x8(name, mode, parent, value);
}
EXPORT_SYMBOL_GPL(edac_debugfs_create_x8);
/* Wrapper for debugfs_create_x16() */
void edac_debugfs_create_x16(const char *name, umode_t mode,
struct dentry *parent, u16 *value)
{
if (!parent)
parent = edac_debugfs;
debugfs_create_x16(name, mode, parent, value);
}
EXPORT_SYMBOL_GPL(edac_debugfs_create_x16);
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