Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
edac_module.c
Go to the documentation of this file.
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 <[email protected]>
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 /* 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  */
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  */
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  */
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  */
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  err = edac_mc_sysfs_init();
94  if (err)
95  goto error;
96 
97  edac_debugfs_init();
98 
99  /* Setup/Initialize the workq for this core */
100  err = edac_workqueue_setup();
101  if (err) {
102  edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n");
103  goto error;
104  }
105 
106  return 0;
107 
108 error:
109  return err;
110 }
111 
112 /*
113  * edac_exit()
114  * module exit/termination function
115  */
116 static void __exit edac_exit(void)
117 {
118  edac_dbg(0, "\n");
119 
120  /* tear down the various subsystems */
121  edac_workqueue_teardown();
122  edac_mc_sysfs_exit();
123  edac_debugfs_exit();
124 }
125 
126 /*
127  * Inform the kernel of our entry and exit points
128  */
129 module_init(edac_init);
130 module_exit(edac_exit);
131 
132 MODULE_LICENSE("GPL");
133 MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
134 MODULE_DESCRIPTION("Core library routines for EDAC reporting");
135 
136 /* refer to *_sysfs.c files for parameters that are exported via sysfs */
137 
138 #ifdef CONFIG_EDAC_DEBUG
139 module_param(edac_debug_level, int, 0644);
140 MODULE_PARM_DESC(edac_debug_level, "Debug level");
141 #endif
Generated on Thu Jan 10 2013 13:29:57 for Linux Kernel by   doxygen 1.8.2