Date: July 2010
Contact: Narendra K <narendra_k@dell.com>, linux-bugs@dell.com
Description:
- Reading this attribute will provide the firmware
- given instance (SMBIOS type 41 device type instance) of the
- PCI device. The attribute will be created only if the firmware
- has given an instance number to the PCI device.
+ Reading this attribute will provide the firmware given instance
+ number of the PCI device. Depending on the platform this can
+ be for example the SMBIOS type 41 device type instance or the
+ user-defined ID (UID) on s390. The attribute will be created
+ only if the firmware has given an instance number to the PCI
+ device and that number is guaranteed to uniquely identify the
+ device in the system.
Users:
Userspace applications interested in knowing the
firmware assigned device type instance of the PCI
}
static DEVICE_ATTR_RO(uid_is_unique);
+#ifndef CONFIG_DMI
+/* analogous to smbios index */
+static ssize_t index_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct zpci_dev *zdev = to_zpci(to_pci_dev(dev));
+ u32 index = ~0;
+
+ if (zpci_unique_uid)
+ index = zdev->uid;
+
+ return sysfs_emit(buf, "%u\n", index);
+}
+static DEVICE_ATTR_RO(index);
+
+static umode_t zpci_index_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ return zpci_unique_uid ? attr->mode : 0;
+}
+
+static struct attribute *zpci_ident_attrs[] = {
+ &dev_attr_index.attr,
+ NULL,
+};
+
+static struct attribute_group zpci_ident_attr_group = {
+ .attrs = zpci_ident_attrs,
+ .is_visible = zpci_index_is_visible,
+};
+#endif
+
static struct bin_attribute *zpci_bin_attrs[] = {
&bin_attr_util_string,
&bin_attr_report_error,
const struct attribute_group *zpci_attr_groups[] = {
&zpci_attr_group,
&pfip_attr_group,
+#ifndef CONFIG_DMI
+ &zpci_ident_attr_group,
+#endif
NULL,
};