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authorDoug Thompson <norsk5@yahoo.com>2006-06-14 16:59:48 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-21 12:00:01 -0700
commitbdee9d98d281d84718eaff6bf0dd2b6ad418b36f (patch)
treeb7122ecf946d3922f1462c512e2f0599fb505184
parentacc7c2e0b73a46122ec370bf8a3aa9f19065d331 (diff)
downloadlinux-bdee9d98d281d84718eaff6bf0dd2b6ad418b36f.tar.gz
[PATCH] PCI: Bus Parity Status sysfs interface
From: Doug Thompson <norsk5@yahoo.com> This patch adds the 'broken_parity_status' sysfs attribute file to a PCI device. Reading this attribute a userland program can determine if PCI device provides false positives (value of 1) in its generation of PCI Parity status, or not (value of 0). As PCI devices are found to be 'bad' in this regard, userland programs can also set the appropriate value (root access only) of a faulty device. This per device information will be used in the EDAC PCI Parity scanner code in a future patch once this interface becomes available. Signed-off-by: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/pci/pci-sysfs.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 37897a8c95e0e..bc405c035ce34 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -45,6 +45,28 @@ pci_config_attr(class, "0x%06x\n");
pci_config_attr(irq, "%u\n");
pci_config_attr(is_enabled, "%u\n");
+static ssize_t broken_parity_status_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ return sprintf (buf, "%u\n", pdev->broken_parity_status);
+}
+
+static ssize_t broken_parity_status_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ ssize_t consumed = -EINVAL;
+
+ if ((count > 0) && (*buf == '0' || *buf == '1')) {
+ pdev->broken_parity_status = *buf == '1' ? 1 : 0;
+ consumed = count;
+ }
+ return consumed;
+}
+
static ssize_t local_cpus_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -122,6 +144,8 @@ struct device_attribute pci_dev_attrs[] = {
__ATTR_RO(local_cpus),
__ATTR_RO(modalias),
__ATTR(enable, 0600, is_enabled_show, is_enabled_store),
+ __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
+ broken_parity_status_show,broken_parity_status_store),
__ATTR_NULL,
};