drivers/edac: split out functions to unique files

This is a large patch to refactor the original EDAC module in the kernel
and to break it up into better file granularity, such that each source
file contains a given subsystem of the EDAC CORE.

Originally, the EDAC 'core' was contained in one source file: edac_mc.c
with it corresponding edac_mc.h file.

Now, there are the following files:

edac_module.c	The main module init/exit function and other overhead
edac_mc.c	Code handling the edac_mc class of object
edac_mc_sysfs.c	Code handling for sysfs presentation
edac_pci_sysfs.c  Code handling for PCI sysfs presentation
edac_core.h	CORE .h include file for 'edac_mc' and 'edac_device' drivers
edac_module.h	Internal CORE .h include file

This forms a foundation upon which a later patch can create the 'edac_device'
class of object code in a new file 'edac_device.c'.

Signed-off-by: Douglas Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 889 insertions, 0 deletions

diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
new file mode 100644
index 000000000000..4a5e335f61d3
--- /dev/null
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -0,0 +1,889 @@
+/*
+ * edac_mc kernel module
+ * (C) 2005, 2006 Linux Networx (http://lnxi.com)
+ * This file may be distributed under the terms of the
+ * GNU General Public License.
+ *
+ * Written Doug Thompson <norsk5@xmission.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/sysdev.h>
+#include <linux/ctype.h>
+
+#include "edac_mc.h"
+#include "edac_module.h"
+
+/* MC EDAC Controls, setable by module parameter, and sysfs */
+static int log_ue = 1;
+static int log_ce = 1;
+static int panic_on_ue;
+static int poll_msec = 1000;
+
+/* Getter functions for above */
+int edac_get_log_ue()
+{
+        return log_ue;
+}
+
+int edac_get_log_ce()
+{
+        return log_ce;
+}
+
+int edac_get_panic_on_ue()
+{
+        return panic_on_ue;
+}
+
+int edac_get_poll_msec()
+{
+        return poll_msec;
+}
+
+/* Parameter declarations for above */
+module_param(panic_on_ue, int, 0644);
+MODULE_PARM_DESC(panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
+module_param(log_ue, int, 0644);
+MODULE_PARM_DESC(log_ue, "Log uncorrectable error to console: 0=off 1=on");
+module_param(log_ce, int, 0644);
+MODULE_PARM_DESC(log_ce, "Log correctable error to console: 0=off 1=on");
+module_param(poll_msec, int, 0644);
+MODULE_PARM_DESC(poll_msec, "Polling period in milliseconds");
+
+
+/*
+ * various constants for Memory Controllers
+ */
+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
+ *      need to export to other files in this modules
+ */
+struct sysdev_class edac_class = {
+        set_kset_name("edac"),
+};
+
+/* sysfs object:
+ *      /sys/devices/system/edac/mc
+ */
+static struct kobject edac_memctrl_kobj;
+
+/* We use these to wait for the reference counts on edac_memctrl_kobj and
+ * edac_pci_kobj to reach 0.
+ */
+static struct completion edac_memctrl_kobj_complete;
+
+/*
+ * /sys/devices/system/edac/mc;
+ *      data structures and methods
+ */
+static ssize_t memctrl_int_show(void *ptr, char *buffer)
+{
+        int *value = (int*) ptr;
+        return sprintf(buffer, "%u\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)                  \
+static 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)     \
+static struct memctrl_dev_attribute attr_##_name = {                    \
+        .attr = {.name = __stringify(_name), .mode = _mode },   \
+        .value  = _data,                                        \
+        .show   = _show,                                        \
+        .store  = _store,                                       \
+};
+
+/* 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,
+        NULL,
+};
+
+/* Main MC kobject release() function */
+static void edac_memctrl_master_release(struct kobject *kobj)
+{
+        debugf1("%s()\n", __func__);
+        complete(&edac_memctrl_kobj_complete);
+}
+
+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
+ */
+int edac_sysfs_memctrl_setup(void)
+{
+        int err = 0;
+
+        debugf1("%s()\n", __func__);
+
+        /* create the /sys/devices/system/edac directory */
+        err = sysdev_class_register(&edac_class);
+
+        if (err) {
+                debugf1("%s() error=%d\n", __func__, err);
+                return err;
+        }
+
+        /* Init the MC's kobject */
+        memset(&edac_memctrl_kobj, 0, sizeof (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)
+                goto fail;
+
+        /* FIXME: maybe new sysdev_create_subdir() */
+        err = kobject_register(&edac_memctrl_kobj);
+
+        if (err) {
+                debugf1("Failed to register '.../edac/mc'\n");
+                goto fail;
+        }
+
+        debugf1("Registered '.../edac/mc' kobject\n");
+
+        return 0;
+
+fail:
+        sysdev_class_unregister(&edac_class);
+        return err;
+}
+
+/*
+ * MC teardown:
+ *      the '..../edac/mc' kobject followed by '..../edac' itself
+ */
+void edac_sysfs_memctrl_teardown(void)
+{
+        debugf0("MC: " __FILE__ ": %s()\n", __func__);
+
+        /* Unregister the MC's kobject and wait for reference count to reach 0.
+         */
+        init_completion(&edac_memctrl_kobj_complete);
+        kobject_unregister(&edac_memctrl_kobj);
+        wait_for_completion(&edac_memctrl_kobj_complete);
+
+        /* Unregister the 'edac' object */
+        sysdev_class_unregister(&edac_class);
+}
+
+
+/* EDAC sysfs CSROW data structures and methods
+ */
+
+/* Set of more default csrow<id> attribute show/store functions */
+static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data, int private)
+{
+        return sprintf(data,"%u\n", csrow->ue_count);
+}
+
+static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data, int private)
+{
+        return sprintf(data,"%u\n", csrow->ce_count);
+}
+
+static ssize_t csrow_size_show(struct csrow_info *csrow, char *data, int private)
+{
+        return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
+}
+
+static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data, int private)
+{
+        return sprintf(data,"%s\n", mem_types[csrow->mtype]);
+}
+
+static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data, int private)
+{
+        return sprintf(data,"%s\n", dev_types[csrow->dtype]);
+}
+
+static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data, int private)
+{
+        return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]);
+}
+
+/* show/store functions for DIMM Label attributes */
+static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
+                char *data, int channel)
+{
+        return snprintf(data, EDAC_MC_LABEL_LEN,"%s",
+                        csrow->channels[channel].label);
+}
+
+static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
+                                const char *data,
+                                size_t count,
+                                int channel)
+{
+        ssize_t max_size = 0;
+
+        max_size = min((ssize_t)count,(ssize_t)EDAC_MC_LABEL_LEN-1);
+        strncpy(csrow->channels[channel].label, data, max_size);
+        csrow->channels[channel].label[max_size] = '\0';
+
+        return max_size;
+}
+
+/* show function for dynamic chX_ce_count attribute */
+static ssize_t channel_ce_count_show(struct csrow_info *csrow,
+                                char *data,
+                                int channel)
+{
+        return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
+}
+
+/* csrow specific attribute structure */
+struct csrowdev_attribute {
+        struct attribute attr;
+        ssize_t (*show)(struct csrow_info *,char *,int);
+        ssize_t (*store)(struct csrow_info *, const char *,size_t,int);
+        int    private;
+};
+
+#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 default csrow attributes */
+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,
+                                        csrowdev_attr->private);
+        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,
+                                        csrowdev_attr->private);
+        return -EIO;
+}
+
+static struct sysfs_ops csrowfs_ops = {
+        .show   = csrowdev_show,
+        .store  = csrowdev_store
+};
+
+#define CSROWDEV_ATTR(_name,_mode,_show,_store,_private)        \
+static struct csrowdev_attribute attr_##_name = {                       \
+        .attr = {.name = __stringify(_name), .mode = _mode },   \
+        .show   = _show,                                        \
+        .store  = _store,                                       \
+        .private = _private,                                    \
+};
+
+/* default cwrow<id>/attribute files */
+CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL,0);
+CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL,0);
+CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL,0);
+CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL,0);
+CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL,0);
+CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL,0);
+
+/* default attributes of the CSROW<id> object */
+static struct csrowdev_attribute *default_csrow_attr[] = {
+        &attr_dev_type,
+        &attr_mem_type,
+        &attr_edac_mode,
+        &attr_size_mb,
+        &attr_ue_count,
+        &attr_ce_count,
+        NULL,
+};
+
+
+/* possible dynamic channel DIMM Label attribute files */
+CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR,
+                channel_dimm_label_show,
+                channel_dimm_label_store,
+                0 );
+CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR,
+                channel_dimm_label_show,
+                channel_dimm_label_store,
+                1 );
+CSROWDEV_ATTR(ch2_dimm_label,S_IRUGO|S_IWUSR,
+                channel_dimm_label_show,
+                channel_dimm_label_store,
+                2 );
+CSROWDEV_ATTR(ch3_dimm_label,S_IRUGO|S_IWUSR,
+                channel_dimm_label_show,
+                channel_dimm_label_store,
+                3 );
+CSROWDEV_ATTR(ch4_dimm_label,S_IRUGO|S_IWUSR,
+                channel_dimm_label_show,
+                channel_dimm_label_store,
+                4 );
+CSROWDEV_ATTR(ch5_dimm_label,S_IRUGO|S_IWUSR,
+                channel_dimm_label_show,
+                channel_dimm_label_store,
+                5 );
+
+/* Total possible dynamic DIMM Label attribute file table */
+static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
+                &attr_ch0_dimm_label,
+                &attr_ch1_dimm_label,
+                &attr_ch2_dimm_label,
+                &attr_ch3_dimm_label,
+                &attr_ch4_dimm_label,
+                &attr_ch5_dimm_label
+};
+
+/* possible dynamic channel ce_count attribute files */
+CSROWDEV_ATTR(ch0_ce_count,S_IRUGO|S_IWUSR,
+                channel_ce_count_show,
+                NULL,
+                0 );
+CSROWDEV_ATTR(ch1_ce_count,S_IRUGO|S_IWUSR,
+                channel_ce_count_show,
+                NULL,
+                1 );
+CSROWDEV_ATTR(ch2_ce_count,S_IRUGO|S_IWUSR,
+                channel_ce_count_show,
+                NULL,
+                2 );
+CSROWDEV_ATTR(ch3_ce_count,S_IRUGO|S_IWUSR,
+                channel_ce_count_show,
+                NULL,
+                3 );
+CSROWDEV_ATTR(ch4_ce_count,S_IRUGO|S_IWUSR,
+                channel_ce_count_show,
+                NULL,
+                4 );
+CSROWDEV_ATTR(ch5_ce_count,S_IRUGO|S_IWUSR,
+                channel_ce_count_show,
+                NULL,
+                5 );
+
+/* Total possible dynamic ce_count attribute file table */
+static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
+                &attr_ch0_ce_count,
+                &attr_ch1_ce_count,
+                &attr_ch2_ce_count,
+                &attr_ch3_ce_count,
+                &attr_ch4_ce_count,
+                &attr_ch5_ce_count
+};
+
+
+#define EDAC_NR_CHANNELS        6
+
+/* Create dynamic CHANNEL files, indexed by 'chan',  under specifed CSROW */
+static int edac_create_channel_files(struct kobject *kobj, int chan)
+{
+        int err=-ENODEV;
+
+        if (chan >= EDAC_NR_CHANNELS)
+                return err;
+
+        /* create the DIMM label attribute file */
+        err = sysfs_create_file(kobj,
+                        (struct attribute *) dynamic_csrow_dimm_attr[chan]);
+
+        if (!err) {
+                /* create the CE Count attribute file */
+                err = sysfs_create_file(kobj,
+                        (struct attribute *) dynamic_csrow_ce_count_attr[chan]);
+        } else {
+                debugf1("%s()  dimm labels and ce_count files created", __func__);
+        }
+
+        return err;
+}
+
+/* No memory to release for this kobj */
+static void edac_csrow_instance_release(struct kobject *kobj)
+{
+        struct csrow_info *cs;
+
+        cs = container_of(kobj, struct csrow_info, kobj);
+        complete(&cs->kobj_complete);
+}
+
+/* the kobj_type instance for a CSROW */
+static struct kobj_type ktype_csrow = {
+        .release = edac_csrow_instance_release,
+        .sysfs_ops = &csrowfs_ops,
+        .default_attrs = (struct attribute **) default_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;
+        int chan;
+
+        memset(&csrow->kobj, 0, sizeof(csrow->kobj));
+
+        /* generate ..../edac/mc/mc<id>/csrow<index>   */
+
+        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)
+                goto error_exit;
+
+        /* Instanstiate the csrow object */
+        err = kobject_register(&csrow->kobj);
+        if (!err) {
+                /* Create the dyanmic attribute files on this csrow,
+                 * namely, the DIMM labels and the channel ce_count
+                 */
+                for (chan = 0; chan < csrow->nr_channels; chan++) {
+                        err = edac_create_channel_files(&csrow->kobj,chan);
+                        if (err)
+                                break;
+                }
+        }
+
+error_exit:
+        return err;
+}
+
+/* default sysfs methods and data structures for the main MCI kobject */
+
+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;
+}
+
+/* memory scrubbing */
+static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
+                                        const char *data, size_t count)
+{
+        u32 bandwidth = -1;
+
+        if (mci->set_sdram_scrub_rate) {
+
+                memctrl_int_store(&bandwidth, data, count);
+
+                if (!(*mci->set_sdram_scrub_rate)(mci, &bandwidth)) {
+                        edac_printk(KERN_DEBUG, EDAC_MC,
+                                "Scrub rate set successfully, applied: %d\n",
+                                bandwidth);
+                } else {
+                        /* FIXME: error codes maybe? */
+                        edac_printk(KERN_DEBUG, EDAC_MC,
+                                "Scrub rate set FAILED, could not apply: %d\n",
+                                bandwidth);
+                }
+        } else {
+                /* FIXME: produce "not implemented" ERROR for user-side. */
+                edac_printk(KERN_WARNING, EDAC_MC,
+                        "Memory scrubbing 'set'control is not implemented!\n");
+        }
+        return count;
+}
+
+static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
+{
+        u32 bandwidth = -1;
+
+        if (mci->get_sdram_scrub_rate) {
+                if (!(*mci->get_sdram_scrub_rate)(mci, &bandwidth)) {
+                        edac_printk(KERN_DEBUG, EDAC_MC,
+                                "Scrub rate successfully, fetched: %d\n",
+                                bandwidth);
+                } else {
+                        /* FIXME: error codes maybe? */
+                        edac_printk(KERN_DEBUG, EDAC_MC,
+                                "Scrub rate fetch FAILED, got: %d\n",
+                                bandwidth);
+                }
+        } else {
+                /* FIXME: produce "not implemented" ERROR for user-side.  */
+                edac_printk(KERN_WARNING, EDAC_MC,
+                        "Memory scrubbing 'get' control is not implemented!\n");
+        }
+        return sprintf(data, "%d\n", bandwidth);
+}
+
+/* default attribute files for the MCI object */
+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_ctl_name_show(struct mem_ctl_info *mci, char *data)
+{
+        return sprintf(data,"%s\n", mci->ctl_name);
+}
+
+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)
+
+/* MCI show/store functions for top most object */
+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)                   \
+static struct mcidev_attribute mci_attr_##_name = {                     \
+        .attr = {.name = __stringify(_name), .mode = _mode },   \
+        .show   = _show,                                        \
+        .store  = _store,                                       \
+};
+
+/* default Control file */
+MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store);
+
+/* default Attribute files */
+MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_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);
+
+/* memory scrubber attribute file */
+MCIDEV_ATTR(sdram_scrub_rate,S_IRUGO|S_IWUSR,mci_sdram_scrub_rate_show,mci_sdram_scrub_rate_store);
+
+static struct mcidev_attribute *mci_attr[] = {
+        &mci_attr_reset_counters,
+        &mci_attr_mc_name,
+        &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,
+        &mci_attr_sdram_scrub_rate,
+        NULL
+};
+
+/*
+ * Release of a MC controlling instance
+ */
+static void edac_mci_instance_release(struct kobject *kobj)
+{
+        struct mem_ctl_info *mci;
+
+        mci = to_mci(kobj);
+        debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
+        complete(&mci->kobj_complete);
+}
+
+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
+ */
+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("%s() idx=%d\n", __func__, mci->mc_idx);
+        memset(edac_mci_kobj, 0, sizeof(*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->dev->kobj,
+                                EDAC_DEVICE_SYMLINK);
+        if (err)
+                goto fail0;
+
+        /* 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 fail1;
+                }
+        }
+
+        return 0;
+
+        /* CSROW error: backout what has already been registered,  */
+fail1:
+        for ( i--; i >= 0; i--) {
+                if (csrow->nr_pages > 0) {
+                        init_completion(&csrow->kobj_complete);
+                        kobject_unregister(&mci->csrows[i].kobj);
+                        wait_for_completion(&csrow->kobj_complete);
+                }
+        }
+
+fail0:
+        init_completion(&mci->kobj_complete);
+        kobject_unregister(edac_mci_kobj);
+        wait_for_completion(&mci->kobj_complete);
+        return err;
+}
+
+/*
+ * remove a Memory Controller instance
+ */
+void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
+{
+        int i;
+
+        debugf0("%s()\n", __func__);
+
+        /* remove all csrow kobjects */
+        for (i = 0; i < mci->nr_csrows; i++) {
+                if (mci->csrows[i].nr_pages > 0) {
+                        init_completion(&mci->csrows[i].kobj_complete);
+                        kobject_unregister(&mci->csrows[i].kobj);
+                        wait_for_completion(&mci->csrows[i].kobj_complete);
+                }
+        }
+
+        sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
+        init_completion(&mci->kobj_complete);
+        kobject_unregister(&mci->edac_mci_kobj);
+        wait_for_completion(&mci->kobj_complete);
+}
+
+