Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2#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_UNCORRECTED
19 : HW_EVENT_ERR_CORRECTED;
20
21 printk(KERN_DEBUG
22 "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 name
104 * @mode: file permissions
105 * @parent: parent dentry. If NULL, it becomes the toplevel EDAC dir
106 * @data: private data of caller
107 * @fops: file operations of this file
108 */
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);
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
44int __init edac_debugfs_init(void)
45{
46 edac_debugfs = debugfs_create_dir("edac", NULL);
47 if (IS_ERR(edac_debugfs)) {
48 edac_debugfs = NULL;
49 return -ENOMEM;
50 }
51 return 0;
52}
53
54void edac_debugfs_exit(void)
55{
56 debugfs_remove_recursive(edac_debugfs);
57}
58
59int edac_create_debugfs_nodes(struct mem_ctl_info *mci)
60{
61 struct dentry *d, *parent;
62 char name[80];
63 int i;
64
65 if (!edac_debugfs)
66 return -ENODEV;
67
68 d = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs);
69 if (!d)
70 return -ENOMEM;
71 parent = d;
72
73 for (i = 0; i < mci->n_layers; i++) {
74 sprintf(name, "fake_inject_%s",
75 edac_layer_name[mci->layers[i].type]);
76 d = debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent,
77 &mci->fake_inject_layer[i]);
78 if (!d)
79 goto nomem;
80 }
81
82 d = debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent,
83 &mci->fake_inject_ue);
84 if (!d)
85 goto nomem;
86
87 d = debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent,
88 &mci->fake_inject_count);
89 if (!d)
90 goto nomem;
91
92 d = debugfs_create_file("fake_inject", S_IWUSR, parent,
93 &mci->dev,
94 &debug_fake_inject_fops);
95 if (!d)
96 goto nomem;
97
98 mci->debugfs = parent;
99 return 0;
100nomem:
101 edac_debugfs_remove_recursive(mci->debugfs);
102 return -ENOMEM;
103}
104
105/* Create a toplevel dir under EDAC's debugfs hierarchy */
106struct dentry *edac_debugfs_create_dir(const char *dirname)
107{
108 if (!edac_debugfs)
109 return NULL;
110
111 return debugfs_create_dir(dirname, edac_debugfs);
112}
113EXPORT_SYMBOL_GPL(edac_debugfs_create_dir);
114
115/* Create a toplevel dir under EDAC's debugfs hierarchy with parent @parent */
116struct dentry *
117edac_debugfs_create_dir_at(const char *dirname, struct dentry *parent)
118{
119 return debugfs_create_dir(dirname, parent);
120}
121EXPORT_SYMBOL_GPL(edac_debugfs_create_dir_at);
122
123/*
124 * Create a file under EDAC's hierarchy or a sub-hierarchy:
125 *
126 * @name: file name
127 * @mode: file permissions
128 * @parent: parent dentry. If NULL, it becomes the toplevel EDAC dir
129 * @data: private data of caller
130 * @fops: file operations of this file
131 */
132struct dentry *
133edac_debugfs_create_file(const char *name, umode_t mode, struct dentry *parent,
134 void *data, const struct file_operations *fops)
135{
136 if (!parent)
137 parent = edac_debugfs;
138
139 return debugfs_create_file(name, mode, parent, data, fops);
140}
141EXPORT_SYMBOL_GPL(edac_debugfs_create_file);
142
143/* Wrapper for debugfs_create_x8() */
144struct dentry *edac_debugfs_create_x8(const char *name, umode_t mode,
145 struct dentry *parent, u8 *value)
146{
147 if (!parent)
148 parent = edac_debugfs;
149
150 return debugfs_create_x8(name, mode, parent, value);
151}
152EXPORT_SYMBOL_GPL(edac_debugfs_create_x8);
153
154/* Wrapper for debugfs_create_x16() */
155struct dentry *edac_debugfs_create_x16(const char *name, umode_t mode,
156 struct dentry *parent, u16 *value)
157{
158 if (!parent)
159 parent = edac_debugfs;
160
161 return debugfs_create_x16(name, mode, parent, value);
162}
163EXPORT_SYMBOL_GPL(edac_debugfs_create_x16);