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Diffstat (limited to 'drivers/edac/edac_module.c')
-rw-r--r--drivers/edac/edac_module.c147
1 files changed, 138 insertions, 9 deletions
diff --git a/drivers/edac/edac_module.c b/drivers/edac/edac_module.c
index 8db0471a9476..3cd3a236821c 100644
--- a/drivers/edac/edac_module.c
+++ b/drivers/edac/edac_module.c
@@ -13,8 +13,77 @@ int edac_debug_level = 1;
EXPORT_SYMBOL_GPL(edac_debug_level);
#endif
+/* scope is to module level only */
+struct workqueue_struct *edac_workqueue;
+
+/* private to this file */
static struct task_struct *edac_thread;
+
+/*
+ * sysfs object: /sys/devices/system/edac
+ * need to export to other files in this modules
+ */
+static struct sysdev_class edac_class = {
+ set_kset_name("edac"),
+};
+static int edac_class_valid = 0;
+
+/*
+ * edac_get_edac_class()
+ *
+ * return pointer to the edac class of 'edac'
+ */
+struct sysdev_class *edac_get_edac_class(void)
+{
+ struct sysdev_class *classptr=NULL;
+
+ if (edac_class_valid)
+ classptr = &edac_class;
+
+ return classptr;
+}
+
+/*
+ * edac_register_sysfs_edac_name()
+ *
+ * register the 'edac' into /sys/devices/system
+ *
+ * return:
+ * 0 success
+ * !0 error
+ */
+static int edac_register_sysfs_edac_name(void)
+{
+ int err;
+
+ /* create the /sys/devices/system/edac directory */
+ err = sysdev_class_register(&edac_class);
+
+ 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;
+}
+
+
/*
* Check MC status every edac_get_poll_msec().
* Check PCI status every edac_get_poll_msec() as well.
@@ -53,11 +122,40 @@ static int edac_kernel_thread(void *arg)
}
/*
+ * 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)
{
+ int err = 0;
+
edac_printk(KERN_INFO, EDAC_MC, EDAC_MC_VERSION "\n");
/*
@@ -69,32 +167,61 @@ static int __init edac_init(void)
*/
edac_pci_clear_parity_errors();
- /* Create the MC sysfs entries */
+ /*
+ * perform the registration of the /sys/devices/system/edac object
+ */
+ if (edac_register_sysfs_edac_name()) {
+ edac_printk(KERN_ERR, EDAC_MC,
+ "Error initializing 'edac' kobject\n");
+ err = -ENODEV;
+ goto error;
+ }
+
+ /* Create the MC sysfs entries, must be first
+ */
if (edac_sysfs_memctrl_setup()) {
edac_printk(KERN_ERR, EDAC_MC,
"Error initializing sysfs code\n");
- return -ENODEV;
+ err = -ENODEV;
+ goto error_sysfs;
}
/* 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;
+ err = -ENODEV;
+ goto error_mem;
+ }
+
+ /* Setup/Initialize the edac_device system */
+ err = edac_workqueue_setup();
+ if (err) {
+ edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n");
+ goto error_pci;
}
/* 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);
+ err = PTR_ERR(edac_thread);
+ goto error_work;
}
return 0;
+
+ /* Error teardown stack */
+error_work:
+ edac_workqueue_teardown();
+error_pci:
+ edac_sysfs_pci_teardown();
+error_mem:
+ edac_sysfs_memctrl_teardown();
+error_sysfs:
+ edac_unregister_sysfs_edac_name();
+error:
+ return err;
}
/*
@@ -106,9 +233,11 @@ static void __exit edac_exit(void)
debugf0("%s()\n", __func__);
kthread_stop(edac_thread);
- /* tear down the sysfs device */
+ /* tear down the various subsystems*/
+ edac_workqueue_teardown();
edac_sysfs_memctrl_teardown();
edac_sysfs_pci_teardown();
+ edac_unregister_sysfs_edac_name();
}
/*