aboutsummaryrefslogtreecommitdiff
path: root/drivers/edac/edac_module.c
diff options
context:
space:
mode:
authorDouglas Thompson <dougthompson@xmission.com>2007-07-19 01:49:33 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 10:04:53 -0700
commit7c9281d76c1c0b130f79d5fc021084e9749959d4 (patch)
tree8e54412e8dc529e8bf755633ebe71e35183353d0 /drivers/edac/edac_module.c
parentd56933e018b14fc7cad322f413eecc6cb6edf12e (diff)
drivers/edac: split out functions to unique files
This is a large patch to refactor the original EDAC module in the kernel and to break it up into better file granularity, such that each source file contains a given subsystem of the EDAC CORE. Originally, the EDAC 'core' was contained in one source file: edac_mc.c with it corresponding edac_mc.h file. Now, there are the following files: edac_module.c The main module init/exit function and other overhead edac_mc.c Code handling the edac_mc class of object edac_mc_sysfs.c Code handling for sysfs presentation edac_pci_sysfs.c Code handling for PCI sysfs presentation edac_core.h CORE .h include file for 'edac_mc' and 'edac_device' drivers edac_module.h Internal CORE .h include file This forms a foundation upon which a later patch can create the 'edac_device' class of object code in a new file 'edac_device.c'. Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/edac/edac_module.c')
-rw-r--r--drivers/edac/edac_module.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/drivers/edac/edac_module.c b/drivers/edac/edac_module.c
new file mode 100644
index 00000000000..8db0471a947
--- /dev/null
+++ b/drivers/edac/edac_module.c
@@ -0,0 +1,130 @@
+
+#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
+