edac_mc_sysfs.c 21.8 KB
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/*
 * 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>

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#include "edac_core.h"
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#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",
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	[MEM_RMBS] = "RMBS",
	[MEM_DDR2] = "Unbuffered-DDR2",
	[MEM_FB_DDR2] = "FullyBuffered-DDR2",
	[MEM_RDDR2] = "Registered-DDR2"
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};

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/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;
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	struct sysdev_class *edac_class;
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	debugf1("%s()\n", __func__);

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	/* get the /sys/devices/system/edac class reference */
	edac_class = edac_get_edac_class();
	if (edac_class == NULL) {
		debugf1("%s() no edac_class error=%d\n", __func__, err);
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		return err;
	}

	/* Init the MC's kobject */
	memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj));
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	edac_memctrl_kobj.parent = &edac_class->kset.kobj;
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	edac_memctrl_kobj.ktype = &ktype_memctrl;

	/* generate sysfs "..../edac/mc"   */
	err = kobject_set_name(&edac_memctrl_kobj,"mc");
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	if (err) {
		debugf1("%s() Failed to set name '.../edac/mc'\n", __func__ );
		return err;
	}
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	/* FIXME: maybe new sysdev_create_subdir() */
	err = kobject_register(&edac_memctrl_kobj);
	if (err) {
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		debugf1("%s() Failed to register '.../edac/mc'\n", __func__ );
		return err;
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	}

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	debugf1("%s() Registered '.../edac/mc' kobject\n",__func__);
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	return 0;
}

/*
 * 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);
}


/* EDAC sysfs CSROW data structures and methods
 */

/* Set of more default csrow<id> attribute show/store functions */
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static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data,
			int private)
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{
	return sprintf(data,"%u\n", csrow->ue_count);
}

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static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data,
			int private)
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{
	return sprintf(data,"%u\n", csrow->ce_count);
}

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static ssize_t csrow_size_show(struct csrow_info *csrow, char *data,
			int private)
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{
	return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
}

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static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
			int private)
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{
	return sprintf(data,"%s\n", mem_types[csrow->mtype]);
}

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static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
			int private)
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{
	return sprintf(data,"%s\n", dev_types[csrow->dtype]);
}

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static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
			int private)
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{
	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,
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			(struct attribute *)dynamic_csrow_ce_count_attr[chan]);
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	} else {
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		debugf1("%s()  dimm labels and ce_count files created",
			__func__);
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	}

	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,
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			"Memory scrubbing 'get' control is not implemented\n");
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	}
	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 */
752 753
MCIDEV_ATTR(sdram_scrub_rate,S_IRUGO|S_IWUSR,mci_sdram_scrub_rate_show,\
			mci_sdram_scrub_rate_store);
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884

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);
}