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 */
 22int edac_debug_level = 2;
 23EXPORT_SYMBOL_GPL(edac_debug_level);
 24#endif
 25
 26/* scope is to module level only */
 27struct workqueue_struct *edac_workqueue;
 
 
 28
 29/*
 30 * edac_op_state_to_string()
 31 */
 32char *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 */
 52static 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 */
 65static 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 */
 78static 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 */
110workq_fail:
111	edac_sysfs_teardown_mc_kset();
 
 
 
112
113error:
114	return err;
115}
116
117/*
118 * edac_exit()
119 *      module exit/termination function
120 */
121static 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 */
133module_init(edac_init);
134module_exit(edac_exit);
135
136MODULE_LICENSE("GPL");
137MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
138MODULE_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
143module_param(edac_debug_level, int, 0644);
144MODULE_PARM_DESC(edac_debug_level, "Debug level");
145#endif

  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_mc.h"
 16#include "edac_module.h"
 17
 18#define EDAC_VERSION "Ver: 3.0.0"
 19
 20#ifdef CONFIG_EDAC_DEBUG
 21
 22static int edac_set_debug_level(const char *buf,
 23				const struct kernel_param *kp)
 24{
 25	unsigned long val;
 26	int ret;
 27
 28	ret = kstrtoul(buf, 0, &val);
 29	if (ret)
 30		return ret;
 31
 32	if (val > 4)
 33		return -EINVAL;
 34
 35	return param_set_int(buf, kp);
 36}
 37
 38/* Values of 0 to 4 will generate output */
 39int edac_debug_level = 2;
 40EXPORT_SYMBOL_GPL(edac_debug_level);
 
 41
 42module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
 43		  &edac_debug_level, 0644);
 44MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");
 45#endif
 46
 47/*
 48 * edac_op_state_to_string()
 49 */
 50char *edac_op_state_to_string(int opstate)
 51{
 52	if (opstate == OP_RUNNING_POLL)
 53		return "POLLED";
 54	else if (opstate == OP_RUNNING_INTERRUPT)
 55		return "INTERRUPT";
 56	else if (opstate == OP_RUNNING_POLL_INTR)
 57		return "POLL-INTR";
 58	else if (opstate == OP_ALLOC)
 59		return "ALLOC";
 60	else if (opstate == OP_OFFLINE)
 61		return "OFFLINE";
 62
 63	return "UNKNOWN";
 64}
 65
 66/*
 67 * sysfs object: /sys/devices/system/edac
 68 *	need to export to other files
 69 */
 70static const struct bus_type edac_subsys = {
 71	.name = "edac",
 72	.dev_name = "edac",
 73};
 74
 75static int edac_subsys_init(void)
 76{
 77	int err;
 78
 79	/* create the /sys/devices/system/edac directory */
 80	err = subsys_system_register(&edac_subsys, NULL);
 81	if (err)
 82		printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");
 83
 84	return err;
 85}
 86
 87static void edac_subsys_exit(void)
 
 
 
 
 88{
 89	bus_unregister(&edac_subsys);
 
 
 
 
 90}
 91
 92/* return pointer to the 'edac' node in sysfs */
 93const struct bus_type *edac_get_sysfs_subsys(void)
 94{
 95	return &edac_subsys;
 96}
 97EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);
 98/*
 99 * edac_init
100 *      module initialization entry point
101 */
102static int __init edac_init(void)
103{
104	int err = 0;
105
106	edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n");
107
108	err = edac_subsys_init();
109	if (err)
110		return err;
111
112	/*
113	 * Harvest and clear any boot/initialization PCI parity errors
114	 *
115	 * FIXME: This only clears errors logged by devices present at time of
116	 *      module initialization.  We should also do an initial clear
117	 *      of each newly hotplugged device.
118	 */
119	edac_pci_clear_parity_errors();
120
121	err = edac_mc_sysfs_init();
 
 
 
122	if (err)
123		goto err_sysfs;
124
125	edac_debugfs_init();
126
 
127	err = edac_workqueue_setup();
128	if (err) {
129		edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");
130		goto err_wq;
131	}
132
133	return 0;
134
135err_wq:
136	edac_debugfs_exit();
137	edac_mc_sysfs_exit();
138
139err_sysfs:
140	edac_subsys_exit();
141
 
142	return err;
143}
144
145/*
146 * edac_exit()
147 *      module exit/termination function
148 */
149static void __exit edac_exit(void)
150{
151	edac_dbg(0, "\n");
152
153	/* tear down the various subsystems */
154	edac_workqueue_teardown();
155	edac_mc_sysfs_exit();
156	edac_debugfs_exit();
157	edac_subsys_exit();
158}
159
160/*
161 * Inform the kernel of our entry and exit points
162 */
163subsys_initcall(edac_init);
164module_exit(edac_exit);
165
166MODULE_LICENSE("GPL");
167MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
168MODULE_DESCRIPTION("Core library routines for EDAC reporting");