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@@ -0,0 +1,143 @@
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+/*
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+ * Purpose: Export the firmware instance and label associated with
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+ * a pci device to sysfs
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+ * Copyright (C) 2010 Dell Inc.
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+ * by Narendra K <Narendra_K@dell.com>,
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+ * Jordan Hargrave <Jordan_Hargrave@dell.com>
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+ *
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+ * SMBIOS defines type 41 for onboard pci devices. This code retrieves
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+ * the instance number and string from the type 41 record and exports
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+ * it to sysfs.
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+ *
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+ * Please see http://linux.dell.com/wiki/index.php/Oss/libnetdevname for more
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+ * information.
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+ */
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+
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+#include <linux/dmi.h>
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+#include <linux/sysfs.h>
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+#include <linux/pci.h>
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+#include <linux/pci_ids.h>
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+#include <linux/module.h>
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+#include <linux/device.h>
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+#include "pci.h"
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+
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+enum smbios_attr_enum {
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+ SMBIOS_ATTR_NONE = 0,
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+ SMBIOS_ATTR_LABEL_SHOW,
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+ SMBIOS_ATTR_INSTANCE_SHOW,
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+};
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+
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+static mode_t
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+find_smbios_instance_string(struct pci_dev *pdev, char *buf,
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+ enum smbios_attr_enum attribute)
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+{
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+ const struct dmi_device *dmi;
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+ struct dmi_dev_onboard *donboard;
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+ int bus;
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+ int devfn;
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+
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+ bus = pdev->bus->number;
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+ devfn = pdev->devfn;
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+
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+ dmi = NULL;
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+ while ((dmi = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD,
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+ NULL, dmi)) != NULL) {
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+ donboard = dmi->device_data;
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+ if (donboard && donboard->bus == bus &&
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+ donboard->devfn == devfn) {
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+ if (buf) {
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+ if (attribute == SMBIOS_ATTR_INSTANCE_SHOW)
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+ return scnprintf(buf, PAGE_SIZE,
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+ "%d\n",
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+ donboard->instance);
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+ else if (attribute == SMBIOS_ATTR_LABEL_SHOW)
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+ return scnprintf(buf, PAGE_SIZE,
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+ "%s\n",
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+ dmi->name);
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+ }
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+ return strlen(dmi->name);
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+ }
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+ }
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+ return 0;
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+}
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+
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+static mode_t
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+smbios_instance_string_exist(struct kobject *kobj, struct attribute *attr,
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+ int n)
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+{
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+ struct device *dev;
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+ struct pci_dev *pdev;
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+
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+ dev = container_of(kobj, struct device, kobj);
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+ pdev = to_pci_dev(dev);
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+
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+ return find_smbios_instance_string(pdev, NULL, SMBIOS_ATTR_NONE) ?
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+ S_IRUGO : 0;
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+}
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+
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+static ssize_t
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+smbioslabel_show(struct device *dev, struct device_attribute *attr, char *buf)
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+{
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+ struct pci_dev *pdev;
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+ pdev = to_pci_dev(dev);
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+
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+ return find_smbios_instance_string(pdev, buf,
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+ SMBIOS_ATTR_LABEL_SHOW);
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+}
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+
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+static ssize_t
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+smbiosinstance_show(struct device *dev,
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+ struct device_attribute *attr, char *buf)
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+{
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+ struct pci_dev *pdev;
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+ pdev = to_pci_dev(dev);
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+
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+ return find_smbios_instance_string(pdev, buf,
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+ SMBIOS_ATTR_INSTANCE_SHOW);
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+}
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+
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+static struct device_attribute smbios_attr_label = {
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+ .attr = {.name = "label", .mode = 0444, .owner = THIS_MODULE},
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+ .show = smbioslabel_show,
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+};
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+
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+static struct device_attribute smbios_attr_instance = {
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+ .attr = {.name = "index", .mode = 0444, .owner = THIS_MODULE},
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+ .show = smbiosinstance_show,
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+};
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+
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+static struct attribute *smbios_attributes[] = {
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+ &smbios_attr_label.attr,
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+ &smbios_attr_instance.attr,
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+ NULL,
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+};
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+
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+static struct attribute_group smbios_attr_group = {
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+ .attrs = smbios_attributes,
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+ .is_visible = smbios_instance_string_exist,
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+};
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+
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+static int
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+pci_create_smbiosname_file(struct pci_dev *pdev)
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+{
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+ if (!sysfs_create_group(&pdev->dev.kobj, &smbios_attr_group))
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+ return 0;
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+ return -ENODEV;
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+}
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+
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+static void
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+pci_remove_smbiosname_file(struct pci_dev *pdev)
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+{
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+ sysfs_remove_group(&pdev->dev.kobj, &smbios_attr_group);
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+}
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+
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+void pci_create_firmware_label_files(struct pci_dev *pdev)
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+{
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+ if (!pci_create_smbiosname_file(pdev))
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+ ;
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+}
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+
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+void pci_remove_firmware_label_files(struct pci_dev *pdev)
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+{
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+ pci_remove_smbiosname_file(pdev);
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+}
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Narendra K