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

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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: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2012-03-21 17:13:24 -03:00
parent 1997471069
commit 8ad6c78a69
1 changed files with 19 additions and 0 deletions
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19
drivers/edac/edac_mc_sysfs.c
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@ -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
};