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"
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 * edac_op_state_to_string()
31 */
edac_op_state_to_string(int opstate)32 char *edac_op_state_to_string(int opstate)
33 {
34 if (opstate == OP_RUNNING_POLL)
35 return "POLLED";
36 else if (opstate == OP_RUNNING_INTERRUPT)
37 return "INTERRUPT";
38 else if (opstate == OP_RUNNING_POLL_INTR)
39 return "POLL-INTR";
40 else if (opstate == OP_ALLOC)
41 return "ALLOC";
42 else if (opstate == OP_OFFLINE)
43 return "OFFLINE";
44
45 return "UNKNOWN";
46 }
47
48 /*
49 * edac_workqueue_setup
50 * initialize the edac work queue for polling operations
51 */
edac_workqueue_setup(void)52 static int edac_workqueue_setup(void)
53 {
54 edac_workqueue = create_singlethread_workqueue("edac-poller");
55 if (edac_workqueue == NULL)
56 return -ENODEV;
57 else
58 return 0;
59 }
60
61 /*
62 * edac_workqueue_teardown
63 * teardown the edac workqueue
64 */
edac_workqueue_teardown(void)65 static void edac_workqueue_teardown(void)
66 {
67 if (edac_workqueue) {
68 flush_workqueue(edac_workqueue);
69 destroy_workqueue(edac_workqueue);
70 edac_workqueue = NULL;
71 }
72 }
73
74 /*
75 * edac_init
76 * module initialization entry point
77 */
edac_init(void)78 static int __init edac_init(void)
79 {
80 int err = 0;
81
82 edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");
83
84 /*
85 * Harvest and clear any boot/initialization PCI parity errors
86 *
87 * FIXME: This only clears errors logged by devices present at time of
88 * module initialization. We should also do an initial clear
89 * of each newly hotplugged device.
90 */
91 edac_pci_clear_parity_errors();
92
93 /*
94 * now set up the mc_kset under the edac class object
95 */
96 err = edac_sysfs_setup_mc_kset();
97 if (err)
98 goto error;
99
100 /* Setup/Initialize the workq for this core */
101 err = edac_workqueue_setup();
102 if (err) {
103 edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n");
104 goto workq_fail;
105 }
106
107 return 0;
108
109 /* Error teardown stack */
110 workq_fail:
111 edac_sysfs_teardown_mc_kset();
112
113 error:
114 return err;
115 }
116
117 /*
118 * edac_exit()
119 * module exit/termination function
120 */
edac_exit(void)121 static void __exit edac_exit(void)
122 {
123 debugf0("%s()\n", __func__);
124
125 /* tear down the various subsystems */
126 edac_workqueue_teardown();
127 edac_sysfs_teardown_mc_kset();
128 }
129
130 /*
131 * Inform the kernel of our entry and exit points
132 */
133 module_init(edac_init);
134 module_exit(edac_exit);
135
136 MODULE_LICENSE("GPL");
137 MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
138 MODULE_DESCRIPTION("Core library routines for EDAC reporting");
139
140 /* refer to *_sysfs.c files for parameters that are exported via sysfs */
141
142 #ifdef CONFIG_EDAC_DEBUG
143 module_param(edac_debug_level, int, 0644);
144 MODULE_PARM_DESC(edac_debug_level, "Debug level");
145 #endif
146