Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#include "edac_module.h"
2
3static struct dentry *edac_debugfs;
4
5static ssize_t edac_fake_inject_write(struct file *file,
6 const char __user *data,
7 size_t count, loff_t *ppos)
8{
9 struct device *dev = file->private_data;
10 struct mem_ctl_info *mci = to_mci(dev);
11 static enum hw_event_mc_err_type type;
12 u16 errcount = mci->fake_inject_count;
13
14 if (!errcount)
15 errcount = 1;
16
17 type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED
18 : HW_EVENT_ERR_CORRECTED;
19
20 printk(KERN_DEBUG
21 "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",
22 errcount,
23 (type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE",
24 errcount > 1 ? "s" : "",
25 mci->fake_inject_layer[0],
26 mci->fake_inject_layer[1],
27 mci->fake_inject_layer[2]
28 );
29 edac_mc_handle_error(type, mci, errcount, 0, 0, 0,
30 mci->fake_inject_layer[0],
31 mci->fake_inject_layer[1],
32 mci->fake_inject_layer[2],
33 "FAKE ERROR", "for EDAC testing only");
34
35 return count;
36}
37
38static const struct file_operations debug_fake_inject_fops = {
39 .open = simple_open,
40 .write = edac_fake_inject_write,
41 .llseek = generic_file_llseek,
42};
43
44void __init edac_debugfs_init(void)
45{
46 edac_debugfs = debugfs_create_dir("edac", NULL);
47}
48
49void edac_debugfs_exit(void)
50{
51 debugfs_remove_recursive(edac_debugfs);
52}
53
54void edac_create_debugfs_nodes(struct mem_ctl_info *mci)
55{
56 struct dentry *parent;
57 char name[80];
58 int i;
59
60 parent = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs);
61
62 for (i = 0; i < mci->n_layers; i++) {
63 sprintf(name, "fake_inject_%s",
64 edac_layer_name[mci->layers[i].type]);
65 debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent,
66 &mci->fake_inject_layer[i]);
67 }
68
69 debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent,
70 &mci->fake_inject_ue);
71
72 debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent,
73 &mci->fake_inject_count);
74
75 debugfs_create_file("fake_inject", S_IWUSR, parent, &mci->dev,
76 &debug_fake_inject_fops);
77
78 mci->debugfs = parent;
79}
80
81/* Create a toplevel dir under EDAC's debugfs hierarchy */
82struct dentry *edac_debugfs_create_dir(const char *dirname)
83{
84 if (!edac_debugfs)
85 return NULL;
86
87 return debugfs_create_dir(dirname, edac_debugfs);
88}
89EXPORT_SYMBOL_GPL(edac_debugfs_create_dir);
90
91/* Create a toplevel dir under EDAC's debugfs hierarchy with parent @parent */
92struct dentry *
93edac_debugfs_create_dir_at(const char *dirname, struct dentry *parent)
94{
95 return debugfs_create_dir(dirname, parent);
96}
97EXPORT_SYMBOL_GPL(edac_debugfs_create_dir_at);
98
99/*
100 * Create a file under EDAC's hierarchy or a sub-hierarchy:
101 *
102 * @name: file name
103 * @mode: file permissions
104 * @parent: parent dentry. If NULL, it becomes the toplevel EDAC dir
105 * @data: private data of caller
106 * @fops: file operations of this file
107 */
108struct dentry *
109edac_debugfs_create_file(const char *name, umode_t mode, struct dentry *parent,
110 void *data, const struct file_operations *fops)
111{
112 if (!parent)
113 parent = edac_debugfs;
114
115 return debugfs_create_file(name, mode, parent, data, fops);
116}
117EXPORT_SYMBOL_GPL(edac_debugfs_create_file);
118
119/* Wrapper for debugfs_create_x8() */
120struct dentry *edac_debugfs_create_x8(const char *name, umode_t mode,
121 struct dentry *parent, u8 *value)
122{
123 if (!parent)
124 parent = edac_debugfs;
125
126 return debugfs_create_x8(name, mode, parent, value);
127}
128EXPORT_SYMBOL_GPL(edac_debugfs_create_x8);
129
130/* Wrapper for debugfs_create_x16() */
131struct dentry *edac_debugfs_create_x16(const char *name, umode_t mode,
132 struct dentry *parent, u16 *value)
133{
134 if (!parent)
135 parent = edac_debugfs;
136
137 return debugfs_create_x16(name, mode, parent, value);
138}
139EXPORT_SYMBOL_GPL(edac_debugfs_create_x16);