linux-kernel - [EDAC ABI v13 15/25] edac: add a sysfs node to report the maximum location for the system

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Message-Id: <1334608729-30803-16-git-send-email-mchehab@redhat.com>
Date:	Mon, 16 Apr 2012 17:38:39 -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>,
	Doug Thompson <norsk5@...oo.com>
Subject: [EDAC ABI v13 15/25] 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@...hat.com>
Cc: Doug Thompson <norsk5@...oo.com>
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 a4ee4aa..67a07c4 100644
--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -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
 };
 
-- 
1.7.8

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