1 /*
2 * edac_module.c
3 *
4 * (C) 2007 www.softwarebitmaker.com
5 *
6 * This file is licensed under the terms of the GNU General Public
7 * License version 2. This program is licensed "as is" without any
8 * warranty of any kind, whether express or implied.
9 *
10 * Author: Doug Thompson <dougthompson@xmission.com>
11 *
12 */
13 #include <linux/edac.h>
14
15 #include "edac_mc.h"
16 #include "edac_module.h"
17
18 #define EDAC_VERSION "Ver: 3.0.0"
19
20 #ifdef CONFIG_EDAC_DEBUG
21
edac_set_debug_level(const char * buf,const struct kernel_param * kp)22 static int edac_set_debug_level(const char *buf,
23 const struct kernel_param *kp)
24 {
25 unsigned long val;
26 int ret;
27
28 ret = kstrtoul(buf, 0, &val);
29 if (ret)
30 return ret;
31
32 if (val > 4)
33 return -EINVAL;
34
35 return param_set_int(buf, kp);
36 }
37
38 /* Values of 0 to 4 will generate output */
39 int edac_debug_level = 2;
40 EXPORT_SYMBOL_GPL(edac_debug_level);
41
42 module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
43 &edac_debug_level, 0644);
44 MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");
45 #endif
46
47 /*
48 * edac_op_state_to_string()
49 */
edac_op_state_to_string(int opstate)50 char *edac_op_state_to_string(int opstate)
51 {
52 if (opstate == OP_RUNNING_POLL)
53 return "POLLED";
54 else if (opstate == OP_RUNNING_INTERRUPT)
55 return "INTERRUPT";
56 else if (opstate == OP_RUNNING_POLL_INTR)
57 return "POLL-INTR";
58 else if (opstate == OP_ALLOC)
59 return "ALLOC";
60 else if (opstate == OP_OFFLINE)
61 return "OFFLINE";
62
63 return "UNKNOWN";
64 }
65
66 /*
67 * sysfs object: /sys/devices/system/edac
68 * need to export to other files
69 */
70 static struct bus_type edac_subsys = {
71 .name = "edac",
72 .dev_name = "edac",
73 };
74
edac_subsys_init(void)75 static int edac_subsys_init(void)
76 {
77 int err;
78
79 /* create the /sys/devices/system/edac directory */
80 err = subsys_system_register(&edac_subsys, NULL);
81 if (err)
82 printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");
83
84 return err;
85 }
86
edac_subsys_exit(void)87 static void edac_subsys_exit(void)
88 {
89 bus_unregister(&edac_subsys);
90 }
91
92 /* return pointer to the 'edac' node in sysfs */
edac_get_sysfs_subsys(void)93 struct bus_type *edac_get_sysfs_subsys(void)
94 {
95 return &edac_subsys;
96 }
97 EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);
98 /*
99 * edac_init
100 * module initialization entry point
101 */
edac_init(void)102 static int __init edac_init(void)
103 {
104 int err = 0;
105
106 edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");
107
108 err = edac_subsys_init();
109 if (err)
110 return err;
111
112 /*
113 * Harvest and clear any boot/initialization PCI parity errors
114 *
115 * FIXME: This only clears errors logged by devices present at time of
116 * module initialization. We should also do an initial clear
117 * of each newly hotplugged device.
118 */
119 edac_pci_clear_parity_errors();
120
121 err = edac_mc_sysfs_init();
122 if (err)
123 goto err_sysfs;
124
125 edac_debugfs_init();
126
127 err = edac_workqueue_setup();
128 if (err) {
129 edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");
130 goto err_wq;
131 }
132
133 return 0;
134
135 err_wq:
136 edac_debugfs_exit();
137 edac_mc_sysfs_exit();
138
139 err_sysfs:
140 edac_subsys_exit();
141
142 return err;
143 }
144
145 /*
146 * edac_exit()
147 * module exit/termination function
148 */
edac_exit(void)149 static void __exit edac_exit(void)
150 {
151 edac_dbg(0, "\n");
152
153 /* tear down the various subsystems */
154 edac_workqueue_teardown();
155 edac_mc_sysfs_exit();
156 edac_debugfs_exit();
157 edac_subsys_exit();
158 }
159
160 /*
161 * Inform the kernel of our entry and exit points
162 */
163 subsys_initcall(edac_init);
164 module_exit(edac_exit);
165
166 MODULE_LICENSE("GPL");
167 MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
168 MODULE_DESCRIPTION("Core library routines for EDAC reporting");
169