Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / edac / edac_module.c

diff --git a/kernel/drivers/edac/edac_module.c b/kernel/drivers/edac/edac_module.c
new file mode 100644 (file)
index 0000000..9cb082a
--- /dev/null
+++ b/kernel/drivers/edac/edac_module.c
@@ -0,0 +1,157 @@
+/*
+ * 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 "edac_core.h"
+#include "edac_module.h"
+
+#define EDAC_VERSION "Ver: 3.0.0"
+
+#ifdef CONFIG_EDAC_DEBUG
+
+static int edac_set_debug_level(const char *buf, struct kernel_param *kp)
+{
+       unsigned long val;
+       int ret;
+
+       ret = kstrtoul(buf, 0, &val);
+       if (ret)
+               return ret;
+
+       if (val > 4)
+               return -EINVAL;
+
+       return param_set_int(buf, kp);
+}
+
+/* Values of 0 to 4 will generate output */
+int edac_debug_level = 2;
+EXPORT_SYMBOL_GPL(edac_debug_level);
+
+module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
+                 &edac_debug_level, 0644);
+MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");
+#endif
+
+/* scope is to module level only */
+struct workqueue_struct *edac_workqueue;
+
+/*
+ * 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_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_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();
+
+       err = edac_mc_sysfs_init();
+       if (err)
+               goto err_sysfs;
+
+       edac_debugfs_init();
+
+       err = edac_workqueue_setup();
+       if (err) {
+               edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");
+               goto err_wq;
+       }
+
+       return 0;
+
+err_wq:
+       edac_debugfs_exit();
+       edac_mc_sysfs_exit();
+
+err_sysfs:
+       return err;
+}
+
+/*
+ * edac_exit()
+ *      module exit/termination function
+ */
+static void __exit edac_exit(void)
+{
+       edac_dbg(0, "\n");
+
+       /* tear down the various subsystems */
+       edac_workqueue_teardown();
+       edac_mc_sysfs_exit();
+       edac_debugfs_exit();
+}
+
+/*
+ * Inform the kernel of our entry and exit points
+ */
+subsys_initcall(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");