Root/
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_core.h" |
16 | #include "edac_module.h" |
17 | |
18 | #define EDAC_VERSION "Ver: 2.1.0 " __DATE__ |
19 | |
20 | #ifdef CONFIG_EDAC_DEBUG |
21 | /* Values of 0 to 4 will generate output */ |
22 | int edac_debug_level = 2; |
23 | EXPORT_SYMBOL_GPL(edac_debug_level); |
24 | #endif |
25 | |
26 | /* scope is to module level only */ |
27 | struct workqueue_struct *edac_workqueue; |
28 | |
29 | /* |
30 | * sysfs object: /sys/devices/system/edac |
31 | * need to export to other files in this modules |
32 | */ |
33 | static struct sysdev_class edac_class = { |
34 | .name = "edac", |
35 | }; |
36 | static int edac_class_valid; |
37 | |
38 | /* |
39 | * edac_op_state_to_string() |
40 | */ |
41 | char *edac_op_state_to_string(int opstate) |
42 | { |
43 | if (opstate == OP_RUNNING_POLL) |
44 | return "POLLED"; |
45 | else if (opstate == OP_RUNNING_INTERRUPT) |
46 | return "INTERRUPT"; |
47 | else if (opstate == OP_RUNNING_POLL_INTR) |
48 | return "POLL-INTR"; |
49 | else if (opstate == OP_ALLOC) |
50 | return "ALLOC"; |
51 | else if (opstate == OP_OFFLINE) |
52 | return "OFFLINE"; |
53 | |
54 | return "UNKNOWN"; |
55 | } |
56 | |
57 | /* |
58 | * edac_get_edac_class() |
59 | * |
60 | * return pointer to the edac class of 'edac' |
61 | */ |
62 | struct sysdev_class *edac_get_edac_class(void) |
63 | { |
64 | struct sysdev_class *classptr = NULL; |
65 | |
66 | if (edac_class_valid) |
67 | classptr = &edac_class; |
68 | |
69 | return classptr; |
70 | } |
71 | |
72 | /* |
73 | * edac_register_sysfs_edac_name() |
74 | * |
75 | * register the 'edac' into /sys/devices/system |
76 | * |
77 | * return: |
78 | * 0 success |
79 | * !0 error |
80 | */ |
81 | static int edac_register_sysfs_edac_name(void) |
82 | { |
83 | int err; |
84 | |
85 | /* create the /sys/devices/system/edac directory */ |
86 | err = sysdev_class_register(&edac_class); |
87 | |
88 | if (err) { |
89 | debugf1("%s() error=%d\n", __func__, err); |
90 | return err; |
91 | } |
92 | |
93 | edac_class_valid = 1; |
94 | return 0; |
95 | } |
96 | |
97 | /* |
98 | * sysdev_class_unregister() |
99 | * |
100 | * unregister the 'edac' from /sys/devices/system |
101 | */ |
102 | static void edac_unregister_sysfs_edac_name(void) |
103 | { |
104 | /* only if currently registered, then unregister it */ |
105 | if (edac_class_valid) |
106 | sysdev_class_unregister(&edac_class); |
107 | |
108 | edac_class_valid = 0; |
109 | } |
110 | |
111 | /* |
112 | * edac_workqueue_setup |
113 | * initialize the edac work queue for polling operations |
114 | */ |
115 | static int edac_workqueue_setup(void) |
116 | { |
117 | edac_workqueue = create_singlethread_workqueue("edac-poller"); |
118 | if (edac_workqueue == NULL) |
119 | return -ENODEV; |
120 | else |
121 | return 0; |
122 | } |
123 | |
124 | /* |
125 | * edac_workqueue_teardown |
126 | * teardown the edac workqueue |
127 | */ |
128 | static void edac_workqueue_teardown(void) |
129 | { |
130 | if (edac_workqueue) { |
131 | flush_workqueue(edac_workqueue); |
132 | destroy_workqueue(edac_workqueue); |
133 | edac_workqueue = NULL; |
134 | } |
135 | } |
136 | |
137 | /* |
138 | * edac_init |
139 | * module initialization entry point |
140 | */ |
141 | static int __init edac_init(void) |
142 | { |
143 | int err = 0; |
144 | |
145 | edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n"); |
146 | |
147 | /* |
148 | * Harvest and clear any boot/initialization PCI parity errors |
149 | * |
150 | * FIXME: This only clears errors logged by devices present at time of |
151 | * module initialization. We should also do an initial clear |
152 | * of each newly hotplugged device. |
153 | */ |
154 | edac_pci_clear_parity_errors(); |
155 | |
156 | /* |
157 | * perform the registration of the /sys/devices/system/edac class object |
158 | */ |
159 | if (edac_register_sysfs_edac_name()) { |
160 | edac_printk(KERN_ERR, EDAC_MC, |
161 | "Error initializing 'edac' kobject\n"); |
162 | err = -ENODEV; |
163 | goto error; |
164 | } |
165 | |
166 | /* |
167 | * now set up the mc_kset under the edac class object |
168 | */ |
169 | err = edac_sysfs_setup_mc_kset(); |
170 | if (err) |
171 | goto sysfs_setup_fail; |
172 | |
173 | /* Setup/Initialize the workq for this core */ |
174 | err = edac_workqueue_setup(); |
175 | if (err) { |
176 | edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n"); |
177 | goto workq_fail; |
178 | } |
179 | |
180 | return 0; |
181 | |
182 | /* Error teardown stack */ |
183 | workq_fail: |
184 | edac_sysfs_teardown_mc_kset(); |
185 | |
186 | sysfs_setup_fail: |
187 | edac_unregister_sysfs_edac_name(); |
188 | |
189 | error: |
190 | return err; |
191 | } |
192 | |
193 | /* |
194 | * edac_exit() |
195 | * module exit/termination function |
196 | */ |
197 | static void __exit edac_exit(void) |
198 | { |
199 | debugf0("%s()\n", __func__); |
200 | |
201 | /* tear down the various subsystems */ |
202 | edac_workqueue_teardown(); |
203 | edac_sysfs_teardown_mc_kset(); |
204 | edac_unregister_sysfs_edac_name(); |
205 | } |
206 | |
207 | /* |
208 | * Inform the kernel of our entry and exit points |
209 | */ |
210 | module_init(edac_init); |
211 | module_exit(edac_exit); |
212 | |
213 | MODULE_LICENSE("GPL"); |
214 | MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al"); |
215 | MODULE_DESCRIPTION("Core library routines for EDAC reporting"); |
216 | |
217 | /* refer to *_sysfs.c files for parameters that are exported via sysfs */ |
218 | |
219 | #ifdef CONFIG_EDAC_DEBUG |
220 | module_param(edac_debug_level, int, 0644); |
221 | MODULE_PARM_DESC(edac_debug_level, "Debug level"); |
222 | #endif |
223 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9