/*
* edac_module . c
*
* ( C ) 2007 www . softwarebitmaker . 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 < dougthompson @ xmission . com >
*
*/
#include <linux/edac.h>
#include "edac_mc.h"
#include "edac_module.h"
#define EDAC_VERSION "Ver: 3.0.0"
#ifdef CONFIG_EDAC_DEBUG
static int edac_set_debug_level(const char *buf,
const struct kernel_param *kp)
{
unsigned long val;
int ret;
ret = kstrtoul(buf, 0 , &val);
if (ret)
return ret;
if (val > 4 )
return -EINVAL;
return param_set_int(buf, kp);
}
/* Values of 0 to 4 will generate output */
int edac_debug_level = 2 ;
EXPORT_SYMBOL_GPL(edac_debug_level);
module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
&edac_debug_level, 0644 );
MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2" );
#endif
/*
* 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" ;
}
/*
* sysfs object : / sys / devices / system / edac
* need to export to other files
*/
static const struct bus_type edac_subsys = {
.name = "edac" ,
.dev_name = "edac" ,
};
static int edac_subsys_init(void )
{
int err;
/* create the /sys/devices/system/edac directory */
err = subsys_system_register(&edac_subsys, NULL);
if (err)
printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n" );
return err;
}
static void edac_subsys_exit(void )
{
bus_unregister(&edac_subsys);
}
/* return pointer to the 'edac' node in sysfs */
const struct bus_type *edac_get_sysfs_subsys(void )
{
return &edac_subsys;
}
EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);
/*
* edac_init
* module initialization entry point
*/
static int __init edac_init(void )
{
int err = 0 ;
edac_printk(KERN_INFO, EDAC_MC, EDAC_VERSION "\n" );
err = edac_subsys_init();
if (err)
return err;
/*
* 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();
err = edac_mc_sysfs_init();
if (err)
goto err_sysfs;
edac_debugfs_init();
err = edac_workqueue_setup();
if (err) {
edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n" );
goto err_wq;
}
return 0 ;
err_wq:
edac_debugfs_exit();
edac_mc_sysfs_exit();
err_sysfs:
edac_subsys_exit();
return err;
}
/*
* edac_exit ( )
* module exit / termination function
*/
static void __exit edac_exit(void )
{
edac_dbg(0 , "\n" );
/* tear down the various subsystems */
edac_workqueue_teardown();
edac_mc_sysfs_exit();
edac_debugfs_exit();
edac_subsys_exit();
}
/*
* Inform the kernel of our entry and exit points
*/
subsys_initcall(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" );
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