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Commit 8ad6c78a authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

edac: add a sysfs node to report the maximum location for the system 



The userspace tools need to know what's the maximum location on each
system, as it helps to create nice maps showing how the memory was
filled at the system.

Reviewed-by: default avatarAristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 19974710

drivers/edac/edac_mc_sysfs.c

+19 −0
Original line number Diff line number Diff line
@@ -766,6 +766,23 @@ static ssize_t mci_size_mb_show(struct device *dev, 
	return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));

}



static ssize_t mci_max_location_show(struct device *dev,

				     struct device_attribute *mattr,

				     char *data)

{

	struct mem_ctl_info *mci = to_mci(dev);

	int i;

	char *p = data;



	for (i = 0; i < mci->n_layers; i++) {

		p += sprintf(p, "%s %d ",

			     edac_layer_name[mci->layers[i].type],

			     mci->layers[i].size - 1);

	}



	return p - data;

}



/* default Control file */

DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
@@ -777,6 +794,7 @@ DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL); 
DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);

DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);

DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);

DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);



/* memory scrubber attribute file */

DEVICE_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
@@ -792,6 +810,7 @@ static struct attribute *mci_attrs[] = { 
	&dev_attr_ue_count.attr,

	&dev_attr_ce_count.attr,

	&dev_attr_sdram_scrub_rate.attr,

	&dev_attr_max_location.attr,

	NULL

};