linux-kernel - [PATCH 07/14] edac: add a sysfs node to report the maximum location for the system

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Date:	Thu, 29 Mar 2012 14:06:54 -0300
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Linux Edac Mailing List <linux-edac@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Greg K H <gregkh@...uxfoundation.org>
Subject: [PATCH 07/14] 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.

Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>
---
 drivers/edac/edac_mc_sysfs.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
index b0cd5d5..bdd81b4 100644
--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -769,6 +769,23 @@ 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);
 
@@ -780,6 +797,7 @@ 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,
@@ -795,6 +813,7 @@ 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
 };
 
-- 
1.7.8

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