152 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2#include "edac_module.h"3 4static struct dentry *edac_debugfs;5 6static ssize_t edac_fake_inject_write(struct file *file,7 const char __user *data,8 size_t count, loff_t *ppos)9{10 struct device *dev = file->private_data;11 struct mem_ctl_info *mci = to_mci(dev);12 static enum hw_event_mc_err_type type;13 u16 errcount = mci->fake_inject_count;14 15 if (!errcount)16 errcount = 1;17 18 type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED19 : HW_EVENT_ERR_CORRECTED;20 21 printk(KERN_DEBUG22 "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",23 errcount,24 (type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE",25 errcount > 1 ? "s" : "",26 mci->fake_inject_layer[0],27 mci->fake_inject_layer[1],28 mci->fake_inject_layer[2]29 );30 edac_mc_handle_error(type, mci, errcount, 0, 0, 0,31 mci->fake_inject_layer[0],32 mci->fake_inject_layer[1],33 mci->fake_inject_layer[2],34 "FAKE ERROR", "for EDAC testing only");35 36 return count;37}38 39static const struct file_operations debug_fake_inject_fops = {40 .open = simple_open,41 .write = edac_fake_inject_write,42 .llseek = generic_file_llseek,43};44 45void __init edac_debugfs_init(void)46{47 edac_debugfs = debugfs_create_dir("edac", NULL);48}49 50void edac_debugfs_exit(void)51{52 debugfs_remove_recursive(edac_debugfs);53}54 55void edac_create_debugfs_nodes(struct mem_ctl_info *mci)56{57 struct dentry *parent;58 char name[80];59 int i;60 61 parent = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs);62 63 for (i = 0; i < mci->n_layers; i++) {64 sprintf(name, "fake_inject_%s",65 edac_layer_name[mci->layers[i].type]);66 debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent,67 &mci->fake_inject_layer[i]);68 }69 70 debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent,71 &mci->fake_inject_ue);72 73 debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent,74 &mci->fake_inject_count);75 76 debugfs_create_file("fake_inject", S_IWUSR, parent, &mci->dev,77 &debug_fake_inject_fops);78 79 mci->debugfs = parent;80}81 82/* Create a toplevel dir under EDAC's debugfs hierarchy */83struct dentry *edac_debugfs_create_dir(const char *dirname)84{85 if (!edac_debugfs)86 return NULL;87 88 return debugfs_create_dir(dirname, edac_debugfs);89}90EXPORT_SYMBOL_GPL(edac_debugfs_create_dir);91 92/* Create a toplevel dir under EDAC's debugfs hierarchy with parent @parent */93struct dentry *94edac_debugfs_create_dir_at(const char *dirname, struct dentry *parent)95{96 return debugfs_create_dir(dirname, parent);97}98EXPORT_SYMBOL_GPL(edac_debugfs_create_dir_at);99 100/*101 * Create a file under EDAC's hierarchy or a sub-hierarchy:102 *103 * @name: file name104 * @mode: file permissions105 * @parent: parent dentry. If NULL, it becomes the toplevel EDAC dir106 * @data: private data of caller107 * @fops: file operations of this file108 */109struct dentry *110edac_debugfs_create_file(const char *name, umode_t mode, struct dentry *parent,111 void *data, const struct file_operations *fops)112{113 if (!parent)114 parent = edac_debugfs;115 116 return debugfs_create_file(name, mode, parent, data, fops);117}118EXPORT_SYMBOL_GPL(edac_debugfs_create_file);119 120/* Wrapper for debugfs_create_x8() */121void edac_debugfs_create_x8(const char *name, umode_t mode,122 struct dentry *parent, u8 *value)123{124 if (!parent)125 parent = edac_debugfs;126 127 debugfs_create_x8(name, mode, parent, value);128}129EXPORT_SYMBOL_GPL(edac_debugfs_create_x8);130 131/* Wrapper for debugfs_create_x16() */132void edac_debugfs_create_x16(const char *name, umode_t mode,133 struct dentry *parent, u16 *value)134{135 if (!parent)136 parent = edac_debugfs;137 138 debugfs_create_x16(name, mode, parent, value);139}140EXPORT_SYMBOL_GPL(edac_debugfs_create_x16);141 142/* Wrapper for debugfs_create_x32() */143void edac_debugfs_create_x32(const char *name, umode_t mode,144 struct dentry *parent, u32 *value)145{146 if (!parent)147 parent = edac_debugfs;148 149 debugfs_create_x32(name, mode, parent, value);150}151EXPORT_SYMBOL_GPL(edac_debugfs_create_x32);152