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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: 3.0.0" |
19 | |
20 | #ifdef CONFIG_EDAC_DEBUG |
21 | |
22 | static int edac_set_debug_level(const char *buf, struct kernel_param *kp) |
23 | { |
24 | unsigned long val; |
25 | int ret; |
26 | |
27 | ret = kstrtoul(buf, 0, &val); |
28 | if (ret) |
29 | return ret; |
30 | |
31 | if (val < 0 || val > 4) |
32 | return -EINVAL; |
33 | |
34 | return param_set_int(buf, kp); |
35 | } |
36 | |
37 | /* Values of 0 to 4 will generate output */ |
38 | int edac_debug_level = 2; |
39 | EXPORT_SYMBOL_GPL(edac_debug_level); |
40 | |
41 | module_param_call(edac_debug_level, edac_set_debug_level, param_get_int, |
42 | &edac_debug_level, 0644); |
43 | MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2"); |
44 | #endif |
45 | |
46 | /* scope is to module level only */ |
47 | struct workqueue_struct *edac_workqueue; |
48 | |
49 | /* |
50 | * edac_op_state_to_string() |
51 | */ |
52 | char *edac_op_state_to_string(int opstate) |
53 | { |
54 | if (opstate == OP_RUNNING_POLL) |
55 | return "POLLED"; |
56 | else if (opstate == OP_RUNNING_INTERRUPT) |
57 | return "INTERRUPT"; |
58 | else if (opstate == OP_RUNNING_POLL_INTR) |
59 | return "POLL-INTR"; |
60 | else if (opstate == OP_ALLOC) |
61 | return "ALLOC"; |
62 | else if (opstate == OP_OFFLINE) |
63 | return "OFFLINE"; |
64 | |
65 | return "UNKNOWN"; |
66 | } |
67 | |
68 | /* |
69 | * edac_workqueue_setup |
70 | * initialize the edac work queue for polling operations |
71 | */ |
72 | static int edac_workqueue_setup(void) |
73 | { |
74 | edac_workqueue = create_singlethread_workqueue("edac-poller"); |
75 | if (edac_workqueue == NULL) |
76 | return -ENODEV; |
77 | else |
78 | return 0; |
79 | } |
80 | |
81 | /* |
82 | * edac_workqueue_teardown |
83 | * teardown the edac workqueue |
84 | */ |
85 | static void edac_workqueue_teardown(void) |
86 | { |
87 | if (edac_workqueue) { |
88 | flush_workqueue(edac_workqueue); |
89 | destroy_workqueue(edac_workqueue); |
90 | edac_workqueue = NULL; |
91 | } |
92 | } |
93 | |
94 | /* |
95 | * edac_init |
96 | * module initialization entry point |
97 | */ |
98 | static int __init edac_init(void) |
99 | { |
100 | int err = 0; |
101 | |
102 | edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n"); |
103 | |
104 | /* |
105 | * Harvest and clear any boot/initialization PCI parity errors |
106 | * |
107 | * FIXME: This only clears errors logged by devices present at time of |
108 | * module initialization. We should also do an initial clear |
109 | * of each newly hotplugged device. |
110 | */ |
111 | edac_pci_clear_parity_errors(); |
112 | |
113 | err = edac_mc_sysfs_init(); |
114 | if (err) |
115 | goto error; |
116 | |
117 | edac_debugfs_init(); |
118 | |
119 | /* Setup/Initialize the workq for this core */ |
120 | err = edac_workqueue_setup(); |
121 | if (err) { |
122 | edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n"); |
123 | goto error; |
124 | } |
125 | |
126 | return 0; |
127 | |
128 | error: |
129 | return err; |
130 | } |
131 | |
132 | /* |
133 | * edac_exit() |
134 | * module exit/termination function |
135 | */ |
136 | static void __exit edac_exit(void) |
137 | { |
138 | edac_dbg(0, "\n"); |
139 | |
140 | /* tear down the various subsystems */ |
141 | edac_workqueue_teardown(); |
142 | edac_mc_sysfs_exit(); |
143 | edac_debugfs_exit(); |
144 | } |
145 | |
146 | /* |
147 | * Inform the kernel of our entry and exit points |
148 | */ |
149 | subsys_initcall(edac_init); |
150 | module_exit(edac_exit); |
151 | |
152 | MODULE_LICENSE("GPL"); |
153 | MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al"); |
154 | MODULE_DESCRIPTION("Core library routines for EDAC reporting"); |
155 |
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