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Dave Jiang81d87cb2007-07-19 01:49:52 -07001/*
2 * edac_module.c
3 *
Doug Thompsonfb3fb202007-07-19 01:50:30 -07004 * (C) 2007 www.softwarebitmaker.com
5 *
Dave Jiang81d87cb2007-07-19 01:49:52 -07006 * 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 *
Doug Thompsonfb3fb202007-07-19 01:50:30 -070010 * Author: Doug Thompson <dougthompson@xmission.com>
Dave Jiang81d87cb2007-07-19 01:49:52 -070011 *
12 */
Dave Jiangc0d12172007-07-19 01:49:46 -070013#include <linux/edac.h>
Douglas Thompson7c9281d2007-07-19 01:49:33 -070014
Douglas Thompson20bcb7a2007-07-19 01:49:47 -070015#include "edac_core.h"
Douglas Thompson7c9281d2007-07-19 01:49:33 -070016#include "edac_module.h"
17
Mauro Carvalho Chehab5156a5f2012-05-10 12:43:01 -030018#define EDAC_VERSION "Ver: 3.0.0"
Douglas Thompson7c9281d2007-07-19 01:49:33 -070019
20#ifdef CONFIG_EDAC_DEBUG
Borislav Petkov37929872012-09-10 16:50:54 +020021
22static 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
Douglas Thompson7c9281d2007-07-19 01:49:33 -070037/* Values of 0 to 4 will generate output */
Doug Thompson8096cfa2007-07-19 01:50:27 -070038int edac_debug_level = 2;
Douglas Thompson7c9281d2007-07-19 01:49:33 -070039EXPORT_SYMBOL_GPL(edac_debug_level);
Borislav Petkov37929872012-09-10 16:50:54 +020040
41module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
42 &edac_debug_level, 0644);
43MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");
Douglas Thompson7c9281d2007-07-19 01:49:33 -070044#endif
45
Douglas Thompsone27e3da2007-07-19 01:49:36 -070046/* scope is to module level only */
47struct workqueue_struct *edac_workqueue;
48
Douglas Thompsone27e3da2007-07-19 01:49:36 -070049/*
Douglas Thompson494d0d52007-07-19 01:50:21 -070050 * edac_op_state_to_string()
Dave Jiang91b99042007-07-19 01:49:52 -070051 */
Douglas Thompson494d0d52007-07-19 01:50:21 -070052char *edac_op_state_to_string(int opstate)
Dave Jiang91b99042007-07-19 01:49:52 -070053{
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/*
Douglas Thompsone27e3da2007-07-19 01:49:36 -070069 * edac_workqueue_setup
70 * initialize the edac work queue for polling operations
71 */
72static 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 */
85static 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
Douglas Thompsone27e3da2007-07-19 01:49:36 -070094/*
Douglas Thompson7c9281d2007-07-19 01:49:33 -070095 * edac_init
96 * module initialization entry point
97 */
98static int __init edac_init(void)
99{
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700100 int err = 0;
101
Doug Thompsonfb3fb202007-07-19 01:50:30 -0700102 edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700103
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
Douglas Thompson079708b2007-07-19 01:49:58 -0700108 * module initialization. We should also do an initial clear
109 * of each newly hotplugged device.
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700110 */
111 edac_pci_clear_parity_errors();
112
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300113 err = edac_mc_sysfs_init();
Doug Thompson8096cfa2007-07-19 01:50:27 -0700114 if (err)
Borislav Petkov30e1f7a2010-09-02 17:26:48 +0200115 goto error;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700116
Rob Herringe7930ba2012-06-11 21:32:12 -0500117 edac_debugfs_init();
118
Doug Thompson8096cfa2007-07-19 01:50:27 -0700119 /* Setup/Initialize the workq for this core */
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700120 err = edac_workqueue_setup();
121 if (err) {
122 edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n");
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300123 goto error;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700124 }
125
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700126 return 0;
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700127
Douglas Thompson052dfb42007-07-19 01:50:13 -0700128error:
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700129 return err;
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700130}
131
132/*
133 * edac_exit()
134 * module exit/termination function
135 */
136static void __exit edac_exit(void)
137{
Joe Perches956b9ba2012-04-29 17:08:39 -0300138 edac_dbg(0, "\n");
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700139
Douglas Thompson079708b2007-07-19 01:49:58 -0700140 /* tear down the various subsystems */
Douglas Thompsone27e3da2007-07-19 01:49:36 -0700141 edac_workqueue_teardown();
Mauro Carvalho Chehab7a623c02012-04-16 16:41:11 -0300142 edac_mc_sysfs_exit();
Rob Herringe7930ba2012-06-11 21:32:12 -0500143 edac_debugfs_exit();
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700144}
145
146/*
147 * Inform the kernel of our entry and exit points
148 */
Mauro Carvalho Chehab4ab19b02013-02-15 07:57:50 -0300149subsys_initcall(edac_init);
Douglas Thompson7c9281d2007-07-19 01:49:33 -0700150module_exit(edac_exit);
151
152MODULE_LICENSE("GPL");
153MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
154MODULE_DESCRIPTION("Core library routines for EDAC reporting");