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authorEzequiel Garcia <ezequiel.garcia@free-electrons.com>2014-06-24 17:55:50 +0400
committerBrian Norris <computersforpeace@gmail.com>2014-07-09 05:37:26 +0400
commit990a3af0c20590954be01a95c2c3fcef9360a836 (patch)
treefc993286f8726b9a413b4d79e21133f3157ec2e8 /drivers/mtd/mtdcore.c
parent89384f646287437ba18afb28ccb125d5866a7209 (diff)
downloadlinux-990a3af0c20590954be01a95c2c3fcef9360a836.tar.xz
mtd: Add sysfs attributes to expose the ECC stats fields
These new sysfs device attributes allow us to retrieve the ECC and bad block stats by poking a sysfs file, which is often more convenient than using the ioctl. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Tested-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd/mtdcore.c')
-rw-r--r--drivers/mtd/mtdcore.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index d201feeb3ca6..11857faa0d96 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -298,6 +298,47 @@ static ssize_t mtd_ecc_step_size_show(struct device *dev,
}
static DEVICE_ATTR(ecc_step_size, S_IRUGO, mtd_ecc_step_size_show, NULL);
+static ssize_t mtd_ecc_stats_corrected_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_get_drvdata(dev);
+ struct mtd_ecc_stats *ecc_stats = &mtd->ecc_stats;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", ecc_stats->corrected);
+}
+static DEVICE_ATTR(corrected_bits, S_IRUGO,
+ mtd_ecc_stats_corrected_show, NULL);
+
+static ssize_t mtd_ecc_stats_errors_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_get_drvdata(dev);
+ struct mtd_ecc_stats *ecc_stats = &mtd->ecc_stats;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", ecc_stats->failed);
+}
+static DEVICE_ATTR(ecc_failures, S_IRUGO, mtd_ecc_stats_errors_show, NULL);
+
+static ssize_t mtd_badblocks_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_get_drvdata(dev);
+ struct mtd_ecc_stats *ecc_stats = &mtd->ecc_stats;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", ecc_stats->badblocks);
+}
+static DEVICE_ATTR(bad_blocks, S_IRUGO, mtd_badblocks_show, NULL);
+
+static ssize_t mtd_bbtblocks_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mtd_info *mtd = dev_get_drvdata(dev);
+ struct mtd_ecc_stats *ecc_stats = &mtd->ecc_stats;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", ecc_stats->bbtblocks);
+}
+static DEVICE_ATTR(bbt_blocks, S_IRUGO, mtd_bbtblocks_show, NULL);
+
static struct attribute *mtd_attrs[] = {
&dev_attr_type.attr,
&dev_attr_flags.attr,
@@ -310,6 +351,10 @@ static struct attribute *mtd_attrs[] = {
&dev_attr_name.attr,
&dev_attr_ecc_strength.attr,
&dev_attr_ecc_step_size.attr,
+ &dev_attr_corrected_bits.attr,
+ &dev_attr_ecc_failures.attr,
+ &dev_attr_bad_blocks.attr,
+ &dev_attr_bbt_blocks.attr,
&dev_attr_bitflip_threshold.attr,
NULL,
};