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/*
* edac_module.c
*
* (C) 2007 www.douglaskthompson.com
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*
* Author: Doug Thompson <norsk5@xmission.com>
*
*/
#include <linux/edac.h>
#include "edac_core.h"
#include "edac_module.h"
#define EDAC_MC_VERSION "Ver: 2.0.4 " __DATE__
#ifdef CONFIG_EDAC_DEBUG
/* Values of 0 to 4 will generate output */
int edac_debug_level = 1;
EXPORT_SYMBOL_GPL(edac_debug_level);
#endif
/* scope is to module level only */
struct workqueue_struct *edac_workqueue;
/*
* sysfs object: /sys/devices/system/edac
* need to export to other files in this modules
*/
static struct sysdev_class edac_class = {
set_kset_name("edac"),
};
static int edac_class_valid;
/*
* edac_op_state_to_string()
*/
char *edac_op_state_to_string(int opstate)
{
if (opstate == OP_RUNNING_POLL)
return "POLLED";
else if (opstate == OP_RUNNING_INTERRUPT)
return "INTERRUPT";
else if (opstate == OP_RUNNING_POLL_INTR)
return "POLL-INTR";
else if (opstate == OP_ALLOC)
return "ALLOC";
else if (opstate == OP_OFFLINE)
return "OFFLINE";
return "UNKNOWN";
}
/*
* edac_get_edac_class()
*
* return pointer to the edac class of 'edac'
*/
struct sysdev_class *edac_get_edac_class(void)
{
struct sysdev_class *classptr = NULL;
if (edac_class_valid)
classptr = &edac_class;
return classptr;
}
/*
* edac_register_sysfs_edac_name()
*
* register the 'edac' into /sys/devices/system
*
* return:
* 0 success
* !0 error
*/
static int edac_register_sysfs_edac_name(void)
{
int err;
/* create the /sys/devices/system/edac directory */
err = sysdev_class_register(&edac_class);
if (err) {
debugf1("%s() error=%d\n", __func__, err);
return err;
}
edac_class_valid = 1;
return 0;
}
/*
* sysdev_class_unregister()
*
* unregister the 'edac' from /sys/devices/system
*/
static void edac_unregister_sysfs_edac_name(void)
{
/* only if currently registered, then unregister it */
if (edac_class_valid)
sysdev_class_unregister(&edac_class);
edac_class_valid = 0;
}
/*
* edac_workqueue_setup
* initialize the edac work queue for polling operations
*/
static int edac_workqueue_setup(void)
{
edac_workqueue = create_singlethread_workqueue("edac-poller");
if (edac_workqueue == NULL)
return -ENODEV;
else
return 0;
}
/*
* edac_workqueue_teardown
* teardown the edac workqueue
*/
static void edac_workqueue_teardown(void)
{
if (edac_workqueue) {
flush_workqueue(edac_workqueue);
destroy_workqueue(edac_workqueue);
edac_workqueue = NULL;
}
}
/*
* edac_init
* module initialization entry point
*/
static int __init edac_init(void)
{
int err = 0;
edac_printk(KERN_INFO, EDAC_MC, EDAC_MC_VERSION "\n");
/*
* Harvest and clear any boot/initialization PCI parity errors
*
* FIXME: This only clears errors logged by devices present at time of
* module initialization. We should also do an initial clear
* of each newly hotplugged device.
*/
edac_pci_clear_parity_errors();
/*
* perform the registration of the /sys/devices/system/edac object
*/
if (edac_register_sysfs_edac_name()) {
edac_printk(KERN_ERR, EDAC_MC,
"Error initializing 'edac' kobject\n");
err = -ENODEV;
goto error;
}
/* Create the MC sysfs entries, must be first
*/
if (edac_sysfs_memctrl_setup()) {
edac_printk(KERN_ERR, EDAC_MC,
"Error initializing sysfs code\n");
err = -ENODEV;
goto error_sysfs;
}
/* Setup/Initialize the edac_device system */
err = edac_workqueue_setup();
if (err) {
edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n");
goto error_mem;
}
return 0;
/* Error teardown stack */
error_mem:
edac_sysfs_memctrl_teardown();
error_sysfs:
edac_unregister_sysfs_edac_name();
error:
return err;
}
/*
* edac_exit()
* module exit/termination function
*/
static void __exit edac_exit(void)
{
debugf0("%s()\n", __func__);
/* tear down the various subsystems */
edac_workqueue_teardown();
edac_sysfs_memctrl_teardown();
edac_unregister_sysfs_edac_name();
}
/*
* Inform the kernel of our entry and exit points
*/
module_init(edac_init);
module_exit(edac_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
MODULE_DESCRIPTION("Core library routines for EDAC reporting");
/* refer to *_sysfs.c files for parameters that are exported via sysfs */
#ifdef CONFIG_EDAC_DEBUG
module_param(edac_debug_level, int, 0644);
MODULE_PARM_DESC(edac_debug_level, "Debug level");
#endif
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