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: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
index 86da176..87fb396 100644
--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -766,6 +766,23 @@
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(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 @@
&dev_attr_ue_count.attr,
&dev_attr_ce_count.attr,
&dev_attr_sdram_scrub_rate.attr,
+ &dev_attr_max_location.attr,
NULL
};