summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/ras
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/drivers/ras')
-rw-r--r--kernel/drivers/ras/Kconfig2
-rw-r--r--kernel/drivers/ras/Makefile1
-rw-r--r--kernel/drivers/ras/debugfs.c56
-rw-r--r--kernel/drivers/ras/ras.c29
4 files changed, 88 insertions, 0 deletions
diff --git a/kernel/drivers/ras/Kconfig b/kernel/drivers/ras/Kconfig
new file mode 100644
index 000000000..f9da61305
--- /dev/null
+++ b/kernel/drivers/ras/Kconfig
@@ -0,0 +1,2 @@
+config RAS
+ bool
diff --git a/kernel/drivers/ras/Makefile b/kernel/drivers/ras/Makefile
new file mode 100644
index 000000000..d7f73341c
--- /dev/null
+++ b/kernel/drivers/ras/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_RAS) += ras.o debugfs.o
diff --git a/kernel/drivers/ras/debugfs.c b/kernel/drivers/ras/debugfs.c
new file mode 100644
index 000000000..0322acf67
--- /dev/null
+++ b/kernel/drivers/ras/debugfs.c
@@ -0,0 +1,56 @@
+#include <linux/debugfs.h>
+
+static struct dentry *ras_debugfs_dir;
+
+static atomic_t trace_count = ATOMIC_INIT(0);
+
+int ras_userspace_consumers(void)
+{
+ return atomic_read(&trace_count);
+}
+EXPORT_SYMBOL_GPL(ras_userspace_consumers);
+
+static int trace_show(struct seq_file *m, void *v)
+{
+ return atomic_read(&trace_count);
+}
+
+static int trace_open(struct inode *inode, struct file *file)
+{
+ atomic_inc(&trace_count);
+ return single_open(file, trace_show, NULL);
+}
+
+static int trace_release(struct inode *inode, struct file *file)
+{
+ atomic_dec(&trace_count);
+ return single_release(inode, file);
+}
+
+static const struct file_operations trace_fops = {
+ .open = trace_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = trace_release,
+};
+
+int __init ras_add_daemon_trace(void)
+{
+ struct dentry *fentry;
+
+ if (!ras_debugfs_dir)
+ return -ENOENT;
+
+ fentry = debugfs_create_file("daemon_active", S_IRUSR, ras_debugfs_dir,
+ NULL, &trace_fops);
+ if (!fentry)
+ return -ENODEV;
+
+ return 0;
+
+}
+
+void __init ras_debugfs_init(void)
+{
+ ras_debugfs_dir = debugfs_create_dir("ras", NULL);
+}
diff --git a/kernel/drivers/ras/ras.c b/kernel/drivers/ras/ras.c
new file mode 100644
index 000000000..b67dd362b
--- /dev/null
+++ b/kernel/drivers/ras/ras.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Chen, Gong <gong.chen@linux.intel.com>
+ */
+
+#include <linux/init.h>
+#include <linux/ras.h>
+
+#define CREATE_TRACE_POINTS
+#define TRACE_INCLUDE_PATH ../../include/ras
+#include <ras/ras_event.h>
+
+static int __init ras_init(void)
+{
+ int rc = 0;
+
+ ras_debugfs_init();
+ rc = ras_add_daemon_trace();
+
+ return rc;
+}
+subsys_initcall(ras_init);
+
+#if defined(CONFIG_ACPI_EXTLOG) || defined(CONFIG_ACPI_EXTLOG_MODULE)
+EXPORT_TRACEPOINT_SYMBOL_GPL(extlog_mem_event);
+#endif
+EXPORT_TRACEPOINT_SYMBOL_GPL(mc_event);