[PATCH] EDAC: core EDAC support code

This is a subset of the bluesmoke project core code, stripped of the NMI work
which isn't ready to merge and some of the "interesting" proc functionality
that needs reworking or just has no place in kernel.  It requires no core
kernel changes except the added scrub functions already posted.

The goal is to merge further functionality only after the core code is
accepted and proven in the base kernel, and only at the point the upstream
extras are really ready to merge.

From: doug thompson <norsk5@xmission.com>

  This converts EDAC to sysfs and is the final chunk neccessary before EDAC
  has a stable user space API and can be considered for submission into the
  base kernel.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: doug thompson <norsk5@xmission.com>
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2209 insertions, 0 deletions

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
new file mode 100644
index 00000000000..4be9bd0a126
--- /dev/null
+++ b/drivers/edac/edac_mc.c
@@ -0,0 +1,2209 @@
+/*
+ * edac_mc kernel module
+ * (C) 2005 Linux Networx (http://lnxi.com)
+ * This file may be distributed under the terms of the
+ * GNU General Public License.
+ *
+ * Written by Thayne Harbaugh
+ * Based on work by Dan Hollis <goemon at anime dot net> and others.
+ *	http://www.anime.net/~goemon/linux-ecc/
+ *
+ * Modified by Dave Peterson and Doug Thompson
+ *
+ */
+
+
+#include <linux/config.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/smp.h>
+#include <linux/init.h>
+#include <linux/sysctl.h>
+#include <linux/highmem.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/sysdev.h>
+#include <linux/ctype.h>
+
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/edac.h>
+
+#include "edac_mc.h"
+
+#define	EDAC_MC_VERSION	"edac_mc  Ver: 2.0.0 " __DATE__
+
+#ifdef CONFIG_EDAC_DEBUG
+/* Values of 0 to 4 will generate output */
+int edac_debug_level = 1;
+EXPORT_SYMBOL(edac_debug_level);
+#endif
+
+/* EDAC Controls, setable by module parameter, and sysfs */
+static int log_ue = 1;
+static int log_ce = 1;
+static int panic_on_ue = 1;
+static int poll_msec = 1000;
+
+static int check_pci_parity = 0;	/* default YES check PCI parity */
+static int panic_on_pci_parity;		/* default no panic on PCI Parity */
+static atomic_t pci_parity_count = ATOMIC_INIT(0);
+
+/* lock to memory controller's control array */
+static DECLARE_MUTEX(mem_ctls_mutex);
+static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices);
+
+/* Structure of the whitelist and blacklist arrays */
+struct edac_pci_device_list {
+	unsigned int  vendor;		/* Vendor ID */
+	unsigned int  device;		/* Deviice ID */
+};
+
+
+#define MAX_LISTED_PCI_DEVICES		32
+
+/* List of PCI devices (vendor-id:device-id) that should be skipped */
+static struct edac_pci_device_list pci_blacklist[MAX_LISTED_PCI_DEVICES];
+static int pci_blacklist_count;
+
+/* List of PCI devices (vendor-id:device-id) that should be scanned */
+static struct edac_pci_device_list pci_whitelist[MAX_LISTED_PCI_DEVICES];
+static int pci_whitelist_count ;
+
+/*  START sysfs data and methods */
+
+static const char *mem_types[] = {
+	[MEM_EMPTY] = "Empty",
+	[MEM_RESERVED] = "Reserved",
+	[MEM_UNKNOWN] = "Unknown",
+	[MEM_FPM] = "FPM",
+	[MEM_EDO] = "EDO",
+	[MEM_BEDO] = "BEDO",
+	[MEM_SDR] = "Unbuffered-SDR",
+	[MEM_RDR] = "Registered-SDR",
+	[MEM_DDR] = "Unbuffered-DDR",
+	[MEM_RDDR] = "Registered-DDR",
+	[MEM_RMBS] = "RMBS"
+};
+
+static const char *dev_types[] = {
+	[DEV_UNKNOWN] = "Unknown",
+	[DEV_X1] = "x1",
+	[DEV_X2] = "x2",
+	[DEV_X4] = "x4",
+	[DEV_X8] = "x8",
+	[DEV_X16] = "x16",
+	[DEV_X32] = "x32",
+	[DEV_X64] = "x64"
+};
+
+static const char *edac_caps[] = {
+	[EDAC_UNKNOWN] = "Unknown",
+	[EDAC_NONE] = "None",
+	[EDAC_RESERVED] = "Reserved",
+	[EDAC_PARITY] = "PARITY",
+	[EDAC_EC] = "EC",
+	[EDAC_SECDED] = "SECDED",
+	[EDAC_S2ECD2ED] = "S2ECD2ED",
+	[EDAC_S4ECD4ED] = "S4ECD4ED",
+	[EDAC_S8ECD8ED] = "S8ECD8ED",
+	[EDAC_S16ECD16ED] = "S16ECD16ED"
+};
+
+
+/* sysfs object: /sys/devices/system/edac */
+static struct sysdev_class edac_class = {
+	set_kset_name("edac"),
+};
+
+/* sysfs objects:
+ *	/sys/devices/system/edac/mc
+ *	/sys/devices/system/edac/pci
+ */
+static struct kobject edac_memctrl_kobj;
+static struct kobject edac_pci_kobj;
+
+/*
+ * /sys/devices/system/edac/mc;
+ * 	data structures and methods
+ */
+static ssize_t memctrl_string_show(void *ptr, char *buffer)
+{
+	char *value = (char*) ptr;
+	return sprintf(buffer, "%s\n", value);
+}
+
+static ssize_t memctrl_int_show(void *ptr, char *buffer)
+{
+	int *value = (int*) ptr;
+	return sprintf(buffer, "%d\n", *value);
+}
+
+static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
+{
+	int *value = (int*) ptr;
+
+	if (isdigit(*buffer))
+		*value = simple_strtoul(buffer, NULL, 0);
+
+	return count;
+}
+
+struct memctrl_dev_attribute {
+	struct attribute	attr;
+	void	*value;
+	ssize_t (*show)(void *,char *);
+	ssize_t (*store)(void *, const char *, size_t);
+};
+
+/* Set of show/store abstract level functions for memory control object */
+static ssize_t
+memctrl_dev_show(struct kobject *kobj, struct attribute *attr, char *buffer)
+{
+	struct memctrl_dev_attribute *memctrl_dev;
+	memctrl_dev = (struct memctrl_dev_attribute*)attr;
+
+	if (memctrl_dev->show)
+		return memctrl_dev->show(memctrl_dev->value, buffer);
+	return -EIO;
+}
+
+static ssize_t
+memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
+			const char *buffer, size_t count)
+{
+	struct memctrl_dev_attribute *memctrl_dev;
+	memctrl_dev = (struct memctrl_dev_attribute*)attr;
+
+	if (memctrl_dev->store)
+		return memctrl_dev->store(memctrl_dev->value, buffer, count);
+	return -EIO;
+}
+
+static struct sysfs_ops memctrlfs_ops = {
+	.show   = memctrl_dev_show,
+	.store  = memctrl_dev_store
+};
+
+#define MEMCTRL_ATTR(_name,_mode,_show,_store)			\
+struct memctrl_dev_attribute attr_##_name = {			\
+	.attr = {.name = __stringify(_name), .mode = _mode },	\
+	.value  = &_name,					\
+	.show   = _show,					\
+	.store  = _store,					\
+};
+
+#define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store)	\
+struct memctrl_dev_attribute attr_##_name = {			\
+	.attr = {.name = __stringify(_name), .mode = _mode },	\
+	.value  = _data,					\
+	.show   = _show,					\
+	.store  = _store,					\
+};
+
+/* cwrow<id> attribute f*/
+MEMCTRL_STRING_ATTR(mc_version,EDAC_MC_VERSION,S_IRUGO,memctrl_string_show,NULL);
+
+/* csrow<id> control files */
+MEMCTRL_ATTR(panic_on_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
+MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
+MEMCTRL_ATTR(log_ce,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
+MEMCTRL_ATTR(poll_msec,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
+
+
+/* Base Attributes of the memory ECC object */
+static struct memctrl_dev_attribute *memctrl_attr[] = {
+	&attr_panic_on_ue,
+	&attr_log_ue,
+	&attr_log_ce,
+	&attr_poll_msec,
+	&attr_mc_version,
+	NULL,
+};
+
+/* Main MC kobject release() function */
+static void edac_memctrl_master_release(struct kobject *kobj)
+{
+	debugf1("EDAC MC: " __FILE__ ": %s()\n", __func__);
+}
+
+static struct kobj_type ktype_memctrl = {
+	.release	= edac_memctrl_master_release,
+	.sysfs_ops	= &memctrlfs_ops,
+	.default_attrs	= (struct attribute **) memctrl_attr,
+};
+
+
+/* Initialize the main sysfs entries for edac:
+ *   /sys/devices/system/edac
+ *
+ * and children
+ *
+ * Return:  0 SUCCESS
+ *         !0 FAILURE
+ */
+static int edac_sysfs_memctrl_setup(void)
+{
+	int err=0;
+
+	debugf1("MC: " __FILE__ ": %s()\n", __func__);
+
+	/* create the /sys/devices/system/edac directory */
+	err = sysdev_class_register(&edac_class);
+	if (!err) {
+		/* Init the MC's kobject */
+		memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj));
+		kobject_init(&edac_memctrl_kobj);
+
+		edac_memctrl_kobj.parent = &edac_class.kset.kobj;
+		edac_memctrl_kobj.ktype = &ktype_memctrl;
+
+		/* generate sysfs "..../edac/mc"   */
+		err = kobject_set_name(&edac_memctrl_kobj,"mc");
+		if (!err) {
+			/* FIXME: maybe new sysdev_create_subdir() */
+			err = kobject_register(&edac_memctrl_kobj);
+			if (err) {
+				debugf1("Failed to register '.../edac/mc'\n");
+			} else {
+				debugf1("Registered '.../edac/mc' kobject\n");
+			}
+		}
+	} else {
+		debugf1(KERN_WARNING "__FILE__ %s() error=%d\n", __func__,err);
+	}
+
+	return err;
+}
+
+/*
+ * MC teardown:
+ *	the '..../edac/mc' kobject followed by '..../edac' itself
+ */
+static void edac_sysfs_memctrl_teardown(void)
+{
+	debugf0("MC: " __FILE__ ": %s()\n", __func__);
+
+	/* Unregister the MC's kobject */
+	kobject_unregister(&edac_memctrl_kobj);
+
+	/* release the master edac mc kobject */
+	kobject_put(&edac_memctrl_kobj);
+
+	/* Unregister the 'edac' object */
+	sysdev_class_unregister(&edac_class);
+}
+
+/*
+ * /sys/devices/system/edac/pci;
+ * 	data structures and methods
+ */
+
+struct list_control {
+	struct edac_pci_device_list *list;
+	int *count;
+};
+
+/* Output the list as:  vendor_id:device:id<,vendor_id:device_id> */
+static ssize_t edac_pci_list_string_show(void *ptr, char *buffer)
+{
+	struct list_control *listctl;
+	struct edac_pci_device_list *list;
+	char *p = buffer;
+	int len=0;
+	int i;
+
+	listctl = ptr;
+	list = listctl->list;
+
+	for (i = 0; i < *(listctl->count); i++, list++ ) {
+		if (len > 0)
+			len += snprintf(p + len, (PAGE_SIZE-len), ",");
+
+		len += snprintf(p + len,
+				(PAGE_SIZE-len),
+				"%x:%x",
+				list->vendor,list->device);
+	}
+
+	len += snprintf(p + len,(PAGE_SIZE-len), "\n");
+
+	return (ssize_t) len;
+}
+
+/**
+ *
+ * Scan string from **s to **e looking for one 'vendor:device' tuple
+ * where each field is a hex value
+ *
+ * return 0 if an entry is NOT found
+ * return 1 if an entry is found
+ *	fill in *vendor_id and *device_id with values found
+ *
+ * In both cases, make sure *s has been moved forward toward *e
+ */
+static int parse_one_device(const char **s,const char **e,
+	unsigned int *vendor_id, unsigned int *device_id)
+{
+	const char *runner, *p;
+
+	/* if null byte, we are done */
+	if (!**s) {
+		(*s)++;	/* keep *s moving */
+		return 0;
+	}
+
+	/* skip over newlines & whitespace */
+	if ((**s == '\n') || isspace(**s)) {
+		(*s)++;
+		return 0;
+	}
+
+	if (!isxdigit(**s)) {
+		(*s)++;
+		return 0;
+	}
+
+	/* parse vendor_id */
+	runner = *s;
+	while (runner < *e) {
+		/* scan for vendor:device delimiter */
+		if (*runner == ':') {
+			*vendor_id = simple_strtol((char*) *s, (char**) &p, 16);
+			runner = p + 1;
+			break;
+		}
+		runner++;
+	}
+
+	if (!isxdigit(*runner)) {
+		*s = ++runner;
+		return 0;
+	}
+
+	/* parse device_id */
+	if (runner < *e) {
+		*device_id = simple_strtol((char*)runner, (char**)&p, 16);
+		runner = p;
+	}
+
+	*s = runner;
+
+	return 1;
+}
+
+static ssize_t edac_pci_list_string_store(void *ptr, const char *buffer,
+					size_t count)
+{
+	struct list_control *listctl;
+	struct edac_pci_device_list *list;
+	unsigned int vendor_id, device_id;
+	const char *s, *e;
+	int *index;
+
+	s = (char*)buffer;
+	e = s + count;
+
+	listctl = ptr;
+	list = listctl->list;
+	index = listctl->count;
+
+	*index = 0;
+	while (*index < MAX_LISTED_PCI_DEVICES) {
+
+		if (parse_one_device(&s,&e,&vendor_id,&device_id)) {
+			list[ *index ].vendor = vendor_id;
+			list[ *index ].device = device_id;
+			(*index)++;
+		}
+
+		/* check for all data consume */
+		if (s >= e)
+			break;
+	}
+
+	return count;
+}
+
+static ssize_t edac_pci_int_show(void *ptr, char *buffer)
+{
+	int *value = ptr;
+	return sprintf(buffer,"%d\n",*value);
+}
+
+static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count)
+{
+	int *value = ptr;
+
+	if (isdigit(*buffer))
+		*value = simple_strtoul(buffer,NULL,0);
+
+	return count;
+}
+
+struct edac_pci_dev_attribute {
+	struct attribute	attr;
+	void	*value;
+	ssize_t (*show)(void *,char *);
+	ssize_t (*store)(void *, const char *,size_t);
+};
+
+/* Set of show/store abstract level functions for PCI Parity object */
+static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr,
+				char *buffer)
+{
+	struct edac_pci_dev_attribute *edac_pci_dev;
+	edac_pci_dev= (struct edac_pci_dev_attribute*)attr;
+
+	if (edac_pci_dev->show)
+		return edac_pci_dev->show(edac_pci_dev->value, buffer);
+	return -EIO;
+}
+
+static ssize_t edac_pci_dev_store(struct kobject *kobj, struct attribute *attr,
+				const char *buffer, size_t count)
+{
+	struct edac_pci_dev_attribute *edac_pci_dev;
+	edac_pci_dev= (struct edac_pci_dev_attribute*)attr;
+
+	if (edac_pci_dev->show)
+		return edac_pci_dev->store(edac_pci_dev->value, buffer, count);
+	return -EIO;
+}
+
+static struct sysfs_ops edac_pci_sysfs_ops = {
+	.show   = edac_pci_dev_show,
+	.store  = edac_pci_dev_store
+};
+
+
+#define EDAC_PCI_ATTR(_name,_mode,_show,_store)			\
+struct edac_pci_dev_attribute edac_pci_attr_##_name = {		\
+	.attr = {.name = __stringify(_name), .mode = _mode },	\
+	.value  = &_name,					\
+	.show   = _show,					\
+	.store  = _store,					\
+};
+
+#define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store)	\
+struct edac_pci_dev_attribute edac_pci_attr_##_name = {		\
+	.attr = {.name = __stringify(_name), .mode = _mode },	\
+	.value  = _data,					\
+	.show   = _show,					\
+	.store  = _store,					\
+};
+
+static struct list_control pci_whitelist_control = {
+	.list = pci_whitelist,
+	.count = &pci_whitelist_count
+};
+
+static struct list_control pci_blacklist_control = {
+	.list = pci_blacklist,
+	.count = &pci_blacklist_count
+};
+
+/* whitelist attribute */
+EDAC_PCI_STRING_ATTR(pci_parity_whitelist,
+	&pci_whitelist_control,
+	S_IRUGO|S_IWUSR,
+	edac_pci_list_string_show,
+	edac_pci_list_string_store);
+
+EDAC_PCI_STRING_ATTR(pci_parity_blacklist,
+	&pci_blacklist_control,
+	S_IRUGO|S_IWUSR,
+	edac_pci_list_string_show,
+	edac_pci_list_string_store);
+
+/* PCI Parity control files */
+EDAC_PCI_ATTR(check_pci_parity,S_IRUGO|S_IWUSR,edac_pci_int_show,edac_pci_int_store);
+EDAC_PCI_ATTR(panic_on_pci_parity,S_IRUGO|S_IWUSR,edac_pci_int_show,edac_pci_int_store);
+EDAC_PCI_ATTR(pci_parity_count,S_IRUGO,edac_pci_int_show,NULL);
+
+/* Base Attributes of the memory ECC object */
+static struct edac_pci_dev_attribute *edac_pci_attr[] = {
+	&edac_pci_attr_check_pci_parity,
+	&edac_pci_attr_panic_on_pci_parity,
+	&edac_pci_attr_pci_parity_count,
+	&edac_pci_attr_pci_parity_whitelist,
+	&edac_pci_attr_pci_parity_blacklist,
+	NULL,
+};
+
+/* No memory to release */
+static void edac_pci_release(struct kobject *kobj)
+{
+	debugf1("EDAC PCI: " __FILE__ ": %s()\n", __func__);
+}
+
+static struct kobj_type ktype_edac_pci = {
+	.release	= edac_pci_release,
+	.sysfs_ops	= &edac_pci_sysfs_ops,
+	.default_attrs	= (struct attribute **) edac_pci_attr,
+};
+
+/**
+ * edac_sysfs_pci_setup()
+ *
+ */
+static int edac_sysfs_pci_setup(void)
+{
+	int err;
+
+	debugf1("MC: " __FILE__ ": %s()\n", __func__);
+
+	memset(&edac_pci_kobj, 0, sizeof(edac_pci_kobj));
+
+	kobject_init(&edac_pci_kobj);
+	edac_pci_kobj.parent = &edac_class.kset.kobj;
+	edac_pci_kobj.ktype = &ktype_edac_pci;
+
+	err = kobject_set_name(&edac_pci_kobj, "pci");
+	if (!err) {
+		/* Instanstiate the csrow object */
+		/* FIXME: maybe new sysdev_create_subdir() */
+		err = kobject_register(&edac_pci_kobj);
+		if (err)
+			debugf1("Failed to register '.../edac/pci'\n");
+		else
+			debugf1("Registered '.../edac/pci' kobject\n");
+	}
+	return err;
+}
+
+
+static void edac_sysfs_pci_teardown(void)
+{
+	debugf0("MC: " __FILE__ ": %s()\n", __func__);
+
+	kobject_unregister(&edac_pci_kobj);
+	kobject_put(&edac_pci_kobj);
+}
+
+/* EDAC sysfs CSROW data structures and methods */
+
+/* Set of more detailed csrow<id> attribute show/store functions */
+static ssize_t csrow_ch0_dimm_label_show(struct csrow_info *csrow, char *data)
+{
+	ssize_t size = 0;
+
+	if (csrow->nr_channels > 0) {
+		size = snprintf(data, EDAC_MC_LABEL_LEN,"%s\n",
+			csrow->channels[0].label);
+	}
+	return size;
+}
+
+static ssize_t csrow_ch1_dimm_label_show(struct csrow_info *csrow, char *data)
+{
+	ssize_t size = 0;
+
+	if (csrow->nr_channels > 0) {
+		size = snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
+			csrow->channels[1].label);
+	}
+	return size;
+}
+
+static ssize_t csrow_ch0_dimm_label_store(struct csrow_info *csrow,
+			const char *data, size_t size)
+{
+	ssize_t max_size = 0;
+
+	if (csrow->nr_channels > 0) {
+		max_size = min((ssize_t)size,(ssize_t)EDAC_MC_LABEL_LEN-1);
+		strncpy(csrow->channels[0].label, data, max_size);
+		csrow->channels[0].label[max_size] = '\0';
+	}
+	return size;
+}
+
+static ssize_t csrow_ch1_dimm_label_store(struct csrow_info *csrow,
+			const char *data, size_t size)
+{
+	ssize_t max_size = 0;
+
+	if (csrow->nr_channels > 1) {
+		max_size = min((ssize_t)size,(ssize_t)EDAC_MC_LABEL_LEN-1);
+		strncpy(csrow->channels[1].label, data, max_size);
+		csrow->channels[1].label[max_size] = '\0';
+	}
+	return max_size;
+}
+
+static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data)
+{
+	return sprintf(data,"%u\n", csrow->ue_count);
+}
+
+static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data)
+{
+	return sprintf(data,"%u\n", csrow->ce_count);
+}
+
+static ssize_t csrow_ch0_ce_count_show(struct csrow_info *csrow, char *data)
+{
+	ssize_t size = 0;
+
+	if (csrow->nr_channels > 0) {
+		size = sprintf(data,"%u\n", csrow->channels[0].ce_count);
+	}
+	return size;
+}
+
+static ssize_t csrow_ch1_ce_count_show(struct csrow_info *csrow, char *data)
+{
+	ssize_t size = 0;
+
+	if (csrow->nr_channels > 1) {
+		size = sprintf(data,"%u\n", csrow->channels[1].ce_count);
+	}
+	return size;
+}
+
+static ssize_t csrow_size_show(struct csrow_info *csrow, char *data)
+{
+	return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
+}
+
+static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data)
+{
+	return sprintf(data,"%s\n", mem_types[csrow->mtype]);
+}
+
+static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data)
+{
+	return sprintf(data,"%s\n", dev_types[csrow->dtype]);
+}
+
+static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data)
+{
+	return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]);
+}
+
+struct csrowdev_attribute {
+	struct attribute	attr;
+	ssize_t (*show)(struct csrow_info *,char *);
+	ssize_t (*store)(struct csrow_info *, const char *,size_t);
+};
+
+#define to_csrow(k) container_of(k, struct csrow_info, kobj)
+#define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
+
+/* Set of show/store higher level functions for csrow objects */
+static ssize_t csrowdev_show(struct kobject *kobj, struct attribute *attr,
+				char *buffer)
+{
+	struct csrow_info *csrow = to_csrow(kobj);
+	struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
+
+	if (csrowdev_attr->show)
+		return csrowdev_attr->show(csrow, buffer);
+	return -EIO;
+}
+
+static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
+				const char *buffer, size_t count)
+{
+	struct csrow_info *csrow = to_csrow(kobj);
+	struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr);
+
+	if (csrowdev_attr->store)
+		return csrowdev_attr->store(csrow, buffer, count);
+	return -EIO;
+}
+
+static struct sysfs_ops csrowfs_ops = {
+	.show   = csrowdev_show,
+	.store  = csrowdev_store
+};
+
+#define CSROWDEV_ATTR(_name,_mode,_show,_store)			\
+struct csrowdev_attribute attr_##_name = {			\
+	.attr = {.name = __stringify(_name), .mode = _mode },	\
+	.show   = _show,					\
+	.store  = _store,					\
+};
+
+/* cwrow<id>/attribute files */
+CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL);
+CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL);
+CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL);
+CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL);
+CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL);
+CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL);
+CSROWDEV_ATTR(ch0_ce_count,S_IRUGO,csrow_ch0_ce_count_show,NULL);
+CSROWDEV_ATTR(ch1_ce_count,S_IRUGO,csrow_ch1_ce_count_show,NULL);
+
+/* control/attribute files */
+CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR,
+		csrow_ch0_dimm_label_show,
+		csrow_ch0_dimm_label_store);
+CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR,
+		csrow_ch1_dimm_label_show,
+		csrow_ch1_dimm_label_store);
+
+
+/* Attributes of the CSROW<id> object */
+static struct csrowdev_attribute *csrow_attr[] = {
+	&attr_dev_type,
+	&attr_mem_type,
+	&attr_edac_mode,
+	&attr_size_mb,
+	&attr_ue_count,
+	&attr_ce_count,
+	&attr_ch0_ce_count,
+	&attr_ch1_ce_count,
+	&attr_ch0_dimm_label,
+	&attr_ch1_dimm_label,
+	NULL,
+};
+
+
+/* No memory to release */
+static void edac_csrow_instance_release(struct kobject *kobj)
+{
+	debugf1("EDAC MC: " __FILE__ ": %s()\n", __func__);
+}
+
+static struct kobj_type ktype_csrow = {
+	.release	= edac_csrow_instance_release,
+	.sysfs_ops	= &csrowfs_ops,
+	.default_attrs	= (struct attribute **) csrow_attr,
+};
+
+/* Create a CSROW object under specifed edac_mc_device */
+static int edac_create_csrow_object(struct kobject *edac_mci_kobj,
+				struct csrow_info *csrow, int index )
+{
+	int err = 0;
+
+	debugf0("MC: " __FILE__ ": %s()\n", __func__);
+
+	memset(&csrow->kobj, 0, sizeof(csrow->kobj));
+
+	/* generate ..../edac/mc/mc<id>/csrow<index>   */
+
+	kobject_init(&csrow->kobj);
+	csrow->kobj.parent = edac_mci_kobj;
+	csrow->kobj.ktype = &ktype_csrow;
+
+	/* name this instance of csrow<id> */
+	err = kobject_set_name(&csrow->kobj,"csrow%d",index);
+	if (!err) {
+		/* Instanstiate the csrow object */
+		err = kobject_register(&csrow->kobj);
+		if (err)
+			debugf0("Failed to register CSROW%d\n",index);
+		else
+			debugf0("Registered CSROW%d\n",index);
+	}
+
+	return err;
+}
+
+/* sysfs data structures and methods for the MCI kobjects */
+
+static ssize_t mci_reset_counters_store(struct mem_ctl_info  *mci,
+					const char *data, size_t count )
+{
+	int row, chan;
+
+	mci->ue_noinfo_count = 0;
+	mci->ce_noinfo_count = 0;
+	mci->ue_count = 0;
+	mci->ce_count = 0;
+	for (row = 0; row < mci->nr_csrows; row++) {
+		struct csrow_info *ri = &mci->csrows[row];
+
+		ri->ue_count = 0;
+		ri->ce_count = 0;
+		for (chan = 0; chan < ri->nr_channels; chan++)
+			ri->channels[chan].ce_count = 0;
+	}
+	mci->start_time = jiffies;
+
+	return count;
+}
+
+static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
+{
+	return sprintf(data,"%d\n", mci->ue_count);
+}
+
+static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
+{
+	return sprintf(data,"%d\n", mci->ce_count);
+}
+
+static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
+{
+	return sprintf(data,"%d\n", mci->ce_noinfo_count);
+}
+
+static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
+{
+	return sprintf(data,"%d\n", mci->ue_noinfo_count);
+}
+
+static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
+{
+	return sprintf(data,"%ld\n", (jiffies - mci->start_time) / HZ);
+}
+
+static ssize_t mci_mod_name_show(struct mem_ctl_info *mci, char *data)
+{
+	return sprintf(data,"%s %s\n", mci->mod_name, mci->mod_ver);
+}
+
+static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
+{
+	return sprintf(data,"%s\n", mci->ctl_name);
+}
+
+static int mci_output_edac_cap(char *buf, unsigned long edac_cap)
+{
+	char *p = buf;
+	int bit_idx;
+
+	for (bit_idx = 0; bit_idx < 8 * sizeof(edac_cap); bit_idx++) {
+		if ((edac_cap >> bit_idx) & 0x1)
+			p += sprintf(p, "%s ", edac_caps[bit_idx]);
+	}
+
+	return p - buf;
+}
+
+static ssize_t mci_edac_capability_show(struct mem_ctl_info *mci, char *data)
+{
+	char *p = data;
+
+	p += mci_output_edac_cap(p,mci->edac_ctl_cap);
+	p += sprintf(p, "\n");
+
+	return p - data;
+}
+
+static ssize_t mci_edac_current_capability_show(struct mem_ctl_info *mci,
+						char *data)
+{
+	char *p = data;
+
+	p += mci_output_edac_cap(p,mci->edac_cap);
+	p += sprintf(p, "\n");
+
+	return p - data;
+}
+
+static int mci_output_mtype_cap(char *buf, unsigned long mtype_cap)
+{
+	char *p = buf;
+	int bit_idx;
+
+	for (bit_idx = 0; bit_idx < 8 * sizeof(mtype_cap); bit_idx++) {
+		if ((mtype_cap >> bit_idx) & 0x1)
+			p += sprintf(p, "%s ", mem_types[bit_idx]);
+	}
+
+	return p - buf;
+}
+
+static ssize_t mci_supported_mem_type_show(struct mem_ctl_info *mci, char *data)
+{
+	char *p = data;
+
+	p += mci_output_mtype_cap(p,mci->mtype_cap);
+	p += sprintf(p, "\n");
+
+	return p - data;
+}
+
+static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
+{
+	int total_pages, csrow_idx;
+
+	for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
+			csrow_idx++) {
+		struct csrow_info *csrow = &mci->csrows[csrow_idx];
+
+		if (!csrow->nr_pages)
+			continue;
+		total_pages += csrow->nr_pages;
+	}
+
+	return sprintf(data,"%u\n", PAGES_TO_MiB(total_pages));
+}
+
+struct mcidev_attribute {
+	struct attribute	attr;
+	ssize_t (*show)(struct mem_ctl_info *,char *);
+	ssize_t (*store)(struct mem_ctl_info *, const char *,size_t);
+};
+
+#define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
+#define to_mcidev_attr(a) container_of(a, struct mcidev_attribute, attr)
+
+static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
+			char *buffer)
+{
+	struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
+	struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr);
+
+	if (mcidev_attr->show)
+		return mcidev_attr->show(mem_ctl_info, buffer);
+	return -EIO;
+}
+
+static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
+				const char *buffer, size_t count)
+{
+	struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
+	struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr);
+
+	if (mcidev_attr->store)
+		return mcidev_attr->store(mem_ctl_info, buffer, count);
+	return -EIO;
+}
+
+static struct sysfs_ops mci_ops = {
+	.show   = mcidev_show,
+	.store  = mcidev_store
+};
+
+#define MCIDEV_ATTR(_name,_mode,_show,_store)			\
+struct mcidev_attribute mci_attr_##_name = {			\
+	.attr = {.name = __stringify(_name), .mode = _mode },	\
+	.show   = _show,					\
+	.store  = _store,					\
+};
+
+/* Control file */
+MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store);
+
+/* Attribute files */
+MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_show,NULL);
+MCIDEV_ATTR(module_name,S_IRUGO,mci_mod_name_show,NULL);
+MCIDEV_ATTR(edac_capability,S_IRUGO,mci_edac_capability_show,NULL);
+MCIDEV_ATTR(size_mb,S_IRUGO,mci_size_mb_show,NULL);
+MCIDEV_ATTR(seconds_since_reset,S_IRUGO,mci_seconds_show,NULL);
+MCIDEV_ATTR(ue_noinfo_count,S_IRUGO,mci_ue_noinfo_show,NULL);
+MCIDEV_ATTR(ce_noinfo_count,S_IRUGO,mci_ce_noinfo_show,NULL);
+MCIDEV_ATTR(ue_count,S_IRUGO,mci_ue_count_show,NULL);
+MCIDEV_ATTR(ce_count,S_IRUGO,mci_ce_count_show,NULL);
+MCIDEV_ATTR(edac_current_capability,S_IRUGO,
+	mci_edac_current_capability_show,NULL);
+MCIDEV_ATTR(supported_mem_type,S_IRUGO,
+	mci_supported_mem_type_show,NULL);
+
+
+static struct mcidev_attribute *mci_attr[] = {
+	&mci_attr_reset_counters,
+	&mci_attr_module_name,
+	&mci_attr_mc_name,
+	&mci_attr_edac_capability,
+	&mci_attr_edac_current_capability,
+	&mci_attr_supported_mem_type,
+	&mci_attr_size_mb,
+	&mci_attr_seconds_since_reset,
+	&mci_attr_ue_noinfo_count,
+	&mci_attr_ce_noinfo_count,
+	&mci_attr_ue_count,
+	&mci_attr_ce_count,
+	NULL
+};
+
+
+/*
+ * Release of a MC controlling instance
+ */
+static void edac_mci_instance_release(struct kobject *kobj)
+{
+	struct mem_ctl_info *mci;
+	mci = container_of(kobj,struct mem_ctl_info,edac_mci_kobj);
+
+	debugf0("MC: " __FILE__ ": %s() idx=%d calling kfree\n",
+		__func__, mci->mc_idx);
+
+	kfree(mci);
+}
+
+static struct kobj_type ktype_mci = {
+	.release	= edac_mci_instance_release,
+	.sysfs_ops	= &mci_ops,
+	.default_attrs	= (struct attribute **) mci_attr,
+};
+
+#define EDAC_DEVICE_SYMLINK	"device"
+
+/*
+ * Create a new Memory Controller kobject instance,
+ *	mc<id> under the 'mc' directory
+ *
+ * Return:
+ *	0	Success
+ *	!0	Failure
+ */
+static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
+{
+	int i;
+	int err;
+	struct csrow_info *csrow;
+	struct kobject *edac_mci_kobj=&mci->edac_mci_kobj;
+
+	debugf0("MC: " __FILE__ ": %s() idx=%d\n", __func__, mci->mc_idx);
+
+	memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj));
+	kobject_init(edac_mci_kobj);
+
+	/* set the name of the mc<id> object */
+	err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx);
+	if (err)
+		return err;
+
+	/* link to our parent the '..../edac/mc' object */
+	edac_mci_kobj->parent = &edac_memctrl_kobj;
+	edac_mci_kobj->ktype = &ktype_mci;
+
+	/* register the mc<id> kobject */
+	err = kobject_register(edac_mci_kobj);
+	if (err)
+		return err;
+
+	/* create a symlink for the device */
+	err = sysfs_create_link(edac_mci_kobj, &mci->pdev->dev.kobj,
+				EDAC_DEVICE_SYMLINK);
+	if (err) {
+		kobject_unregister(edac_mci_kobj);
+		return err;
+	}
+
+	/* Make directories for each CSROW object
+	 * under the mc<id> kobject
+	 */
+	for (i = 0; i < mci->nr_csrows; i++) {
+
+		csrow = &mci->csrows[i];
+
+		/* Only expose populated CSROWs */
+		if (csrow->nr_pages > 0) {
+			err = edac_create_csrow_object(edac_mci_kobj,csrow,i);
+			if (err)
+				goto fail;
+		}
+	}
+
+	/* Mark this MCI instance as having sysfs entries */
+	mci->sysfs_active = MCI_SYSFS_ACTIVE;
+
+	return 0;
+
+
+	/* CSROW error: backout what has already been registered,  */
+fail:
+	for ( i--; i >= 0; i--) {
+		if (csrow->nr_pages > 0) {
+			kobject_unregister(&mci->csrows[i].kobj);
+			kobject_put(&mci->csrows[i].kobj);
+		}
+	}
+
+	kobject_unregister(edac_mci_kobj);
+	kobject_put(edac_mci_kobj);
+
+	return err;
+}
+
+/*
+ * remove a Memory Controller instance
+ */
+static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
+{
+	int i;
+
+	debugf0("MC: " __FILE__ ": %s()\n", __func__);
+
+	/* remove all csrow kobjects */
+	for (i = 0; i < mci->nr_csrows; i++) {
+		if (mci->csrows[i].nr_pages > 0)  {
+			kobject_unregister(&mci->csrows[i].kobj);
+			kobject_put(&mci->csrows[i].kobj);
+		}
+	}
+
+	sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
+
+	kobject_unregister(&mci->edac_mci_kobj);
+	kobject_put(&mci->edac_mci_kobj);
+}
+
+/* END OF sysfs data and methods */
+
+#ifdef CONFIG_EDAC_DEBUG
+
+EXPORT_SYMBOL(edac_mc_dump_channel);
+
+void edac_mc_dump_channel(struct channel_info *chan)
+{
+	debugf4("\tchannel = %p\n", chan);
+	debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx);
+	debugf4("\tchannel->ce_count = %d\n", chan->ce_count);
+	debugf4("\tchannel->label = '%s'\n", chan->label);
+	debugf4("\tchannel->csrow = %p\n\n", chan->csrow);
+}
+
+
+EXPORT_SYMBOL(edac_mc_dump_csrow);
+
+void edac_mc_dump_csrow(struct csrow_info *csrow)
+{
+	debugf4("\tcsrow = %p\n", csrow);
+	debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx);
+	debugf4("\tcsrow->first_page = 0x%lx\n",
+		csrow->first_page);
+	debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page);
+	debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask);
+	debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages);
+	debugf4("\tcsrow->nr_channels = %d\n",
+		csrow->nr_channels);
+	debugf4("\tcsrow->channels = %p\n", csrow->channels);
+	debugf4("\tcsrow->mci = %p\n\n", csrow->mci);
+}
+
+
+EXPORT_SYMBOL(edac_mc_dump_mci);
+
+void edac_mc_dump_mci(struct mem_ctl_info *mci)
+{
+	debugf3("\tmci = %p\n", mci);
+	debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap);
+	de