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#include <linux/freezer.h>
#include <linux/kthread.h>
#include "edac_mc.h"
#include "edac_module.h"
#define EDAC_MC_VERSION "Ver: 2.0.3" __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
static struct task_struct *edac_thread;
/*
* Check MC status every edac_get_poll_msec().
* Check PCI status every edac_get_poll_msec() as well.
*
* This where the work gets done for edac.
*
* SMP safe, doesn't use NMI, and auto-rate-limits.
*/
static void do_edac_check(void)
{
debugf3("%s()\n", __func__);
/* perform the poll activities */
edac_check_mc_devices();
edac_pci_do_parity_check();
}
/*
* Action thread for EDAC to perform the POLL operations
*/
static int edac_kernel_thread(void *arg)
{
int msec;
while (!kthread_should_stop()) {
do_edac_check();
/* goto sleep for the interval */
msec = (HZ * edac_get_poll_msec()) / 1000;
schedule_timeout_interruptible(msec);
try_to_freeze();
}
return 0;
}
/*
* edac_init
* module initialization entry point
*/
static int __init edac_init(void)
{
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();
/* Create the MC sysfs entries */
if (edac_sysfs_memctrl_setup()) {
edac_printk(KERN_ERR, EDAC_MC,
"Error initializing sysfs code\n");
return -ENODEV;
}
/* Create the PCI parity sysfs entries */
if (edac_sysfs_pci_setup()) {
edac_sysfs_memctrl_teardown();
edac_printk(KERN_ERR, EDAC_MC,
"PCI: Error initializing sysfs code\n");
return -ENODEV;
}
/* create our kernel thread */
edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac");
if (IS_ERR(edac_thread)) {
/* remove the sysfs entries */
edac_sysfs_memctrl_teardown();
edac_sysfs_pci_teardown();
return PTR_ERR(edac_thread);
}
return 0;
}
/*
* edac_exit()
* module exit/termination function
*/
static void __exit edac_exit(void)
{
debugf0("%s()\n", __func__);
kthread_stop(edac_thread);
/* tear down the sysfs device */
edac_sysfs_memctrl_teardown();
edac_sysfs_pci_teardown();
}
/*
* 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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