+/*
+ * 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 <linux/freezer.h>
-#include <linux/kthread.h>
-
-#include "edac_mc.h"
+#include "edac_core.h"
#include "edac_module.h"
-#define EDAC_MC_VERSION "Ver: 2.0.3" __DATE__
+#define EDAC_VERSION "Ver: 2.1.0 " __DATE__
#ifdef CONFIG_EDAC_DEBUG
/* Values of 0 to 4 will generate output */
-int edac_debug_level = 1;
+int edac_debug_level = 2;
EXPORT_SYMBOL_GPL(edac_debug_level);
#endif
-static struct task_struct *edac_thread;
+/* scope is to module level only */
+struct workqueue_struct *edac_workqueue;
/*
- * 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.
+ * sysfs object: /sys/devices/system/edac
+ * need to export to other files in this modules
+ */
+static struct sysdev_class edac_class = {
+ .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()
*
- * SMP safe, doesn't use NMI, and auto-rate-limits.
+ * return pointer to the edac class of 'edac'
*/
-static void do_edac_check(void)
+struct sysdev_class *edac_get_edac_class(void)
{
- debugf3("%s()\n", __func__);
+ struct sysdev_class *classptr = NULL;
+
+ if (edac_class_valid)
+ classptr = &edac_class;
- /* perform the poll activities */
- edac_check_mc_devices();
- edac_pci_do_parity_check();
+ return classptr;
}
/*
- * Action thread for EDAC to perform the POLL operations
+ * edac_register_sysfs_edac_name()
+ *
+ * register the 'edac' into /sys/devices/system
+ *
+ * return:
+ * 0 success
+ * !0 error
*/
-static int edac_kernel_thread(void *arg)
+static int edac_register_sysfs_edac_name(void)
{
- int msec;
-
- while (!kthread_should_stop()) {
+ int err;
- do_edac_check();
+ /* create the /sys/devices/system/edac directory */
+ err = sysdev_class_register(&edac_class);
- /* goto sleep for the interval */
- msec = (HZ * edac_get_poll_msec()) / 1000;
- schedule_timeout_interruptible(msec);
- try_to_freeze();
+ 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)
{
- edac_printk(KERN_INFO, EDAC_MC, EDAC_MC_VERSION "\n");
+ int err = 0;
+
+ edac_printk(KERN_INFO, EDAC_MC, EDAC_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.
+ * 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()) {
+ /*
+ * perform the registration of the /sys/devices/system/edac class object
+ */
+ if (edac_register_sysfs_edac_name()) {
edac_printk(KERN_ERR, EDAC_MC,
- "Error initializing sysfs code\n");
- return -ENODEV;
+ "Error initializing 'edac' kobject\n");
+ err = -ENODEV;
+ goto error;
}
- /* 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;
+ /*
+ * now set up the mc_kset under the edac class object
+ */
+ err = edac_sysfs_setup_mc_kset();
+ if (err)
+ goto sysfs_setup_fail;
+
+ /* Setup/Initialize the workq for this core */
+ err = edac_workqueue_setup();
+ if (err) {
+ edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n");
+ goto workq_fail;
}
- /* create our kernel thread */
- edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac");
+ return 0;
- if (IS_ERR(edac_thread)) {
- /* remove the sysfs entries */
- edac_sysfs_memctrl_teardown();
- edac_sysfs_pci_teardown();
- return PTR_ERR(edac_thread);
- }
+ /* Error teardown stack */
+workq_fail:
+ edac_sysfs_teardown_mc_kset();
- return 0;
+sysfs_setup_fail:
+ edac_unregister_sysfs_edac_name();
+
+error:
+ return err;
}
/*
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();
+ /* tear down the various subsystems */
+ edac_workqueue_teardown();
+ edac_sysfs_teardown_mc_kset();
+ edac_unregister_sysfs_edac_name();
}
/*
module_param(edac_debug_level, int, 0644);
MODULE_PARM_DESC(edac_debug_level, "Debug level");
#endif
-
git.openpandora.org / pandora-kernel.git / blobdiff