131 lines
2.8 KiB
C
131 lines
2.8 KiB
C
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#include <linux/freezer.h>
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#include <linux/kthread.h>
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#include "edac_mc.h"
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#include "edac_module.h"
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#define EDAC_MC_VERSION "Ver: 2.0.3" __DATE__
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#ifdef CONFIG_EDAC_DEBUG
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/* Values of 0 to 4 will generate output */
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int edac_debug_level = 1;
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EXPORT_SYMBOL_GPL(edac_debug_level);
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#endif
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static struct task_struct *edac_thread;
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/*
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* Check MC status every edac_get_poll_msec().
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* Check PCI status every edac_get_poll_msec() as well.
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*
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* This where the work gets done for edac.
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*
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* SMP safe, doesn't use NMI, and auto-rate-limits.
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*/
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static void do_edac_check(void)
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{
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debugf3("%s()\n", __func__);
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/* perform the poll activities */
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edac_check_mc_devices();
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edac_pci_do_parity_check();
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}
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/*
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* Action thread for EDAC to perform the POLL operations
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*/
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static int edac_kernel_thread(void *arg)
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{
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int msec;
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while (!kthread_should_stop()) {
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do_edac_check();
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/* goto sleep for the interval */
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msec = (HZ * edac_get_poll_msec()) / 1000;
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schedule_timeout_interruptible(msec);
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try_to_freeze();
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}
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return 0;
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}
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/*
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* edac_init
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* module initialization entry point
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*/
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static int __init edac_init(void)
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{
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edac_printk(KERN_INFO, EDAC_MC, EDAC_MC_VERSION "\n");
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/*
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* Harvest and clear any boot/initialization PCI parity errors
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*
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* FIXME: This only clears errors logged by devices present at time of
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* module initialization. We should also do an initial clear
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* of each newly hotplugged device.
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*/
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edac_pci_clear_parity_errors();
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/* Create the MC sysfs entries */
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if (edac_sysfs_memctrl_setup()) {
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edac_printk(KERN_ERR, EDAC_MC,
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"Error initializing sysfs code\n");
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return -ENODEV;
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}
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/* Create the PCI parity sysfs entries */
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if (edac_sysfs_pci_setup()) {
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edac_sysfs_memctrl_teardown();
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edac_printk(KERN_ERR, EDAC_MC,
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"PCI: Error initializing sysfs code\n");
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return -ENODEV;
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}
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/* create our kernel thread */
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edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac");
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if (IS_ERR(edac_thread)) {
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/* remove the sysfs entries */
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edac_sysfs_memctrl_teardown();
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edac_sysfs_pci_teardown();
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return PTR_ERR(edac_thread);
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}
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return 0;
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}
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/*
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* edac_exit()
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* module exit/termination function
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*/
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static void __exit edac_exit(void)
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{
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debugf0("%s()\n", __func__);
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kthread_stop(edac_thread);
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/* tear down the sysfs device */
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edac_sysfs_memctrl_teardown();
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edac_sysfs_pci_teardown();
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}
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/*
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* Inform the kernel of our entry and exit points
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*/
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module_init(edac_init);
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module_exit(edac_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
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MODULE_DESCRIPTION("Core library routines for EDAC reporting");
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/* refer to *_sysfs.c files for parameters that are exported via sysfs */
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#ifdef CONFIG_EDAC_DEBUG
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module_param(edac_debug_level, int, 0644);
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MODULE_PARM_DESC(edac_debug_level, "Debug level");
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#endif
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