@@ -277,6 +277,28 @@ static void __init dmi_save_ipmi_device(const struct dmi_header *dm)
list_add_tail(&dev->list, &dmi_devices);
}
+static void __init dmi_save_devslot(int id, int seg, int bus, int devfn, const char *name)
+{
+ struct dmi_devslot *slot;
+
+ slot = dmi_alloc(sizeof(*slot) + strlen(name) + 1);
+ if (!slot) {
+ printk(KERN_ERR "dmi_save_devslot: out of memory.\n");
+ return;
+ }
+ slot->id = id;
+ slot->seg = seg;
+ slot->bus = bus;
+ slot->devfn = devfn;
+
+ strcpy((char *)&slot[1], name);
+ slot->dev.type = DMI_DEV_TYPE_DEVSLOT;
+ slot->dev.name = (char *)&slot[1];
+ slot->dev.device_data = slot;
+
+ list_add(&slot->dev.list, &dmi_devices);
+}
+
static void __init dmi_save_extended_devices(const struct dmi_header *dm)
{
const u8 *d = (u8*) dm + 5;
@@ -285,6 +307,7 @@ static void __init dmi_save_extended_devices(const struct dmi_header *dm)
if ((*d & 0x80) == 0)
return;
+ dmi_save_devslot(-1, *(u16 *)(d+2), *(d+4), *(d+5), dmi_string_nosave(dm, *(d-1)));
dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1)));
}
@@ -333,6 +356,7 @@ static void __init dmi_decode(const struct dmi_header *dm, void *dummy)
break;
case 41: /* Onboard Devices Extended Information */
dmi_save_extended_devices(dm);
+ break;
}
}
@@ -4,7 +4,7 @@
obj-y += access.o bus.o probe.o remove.o pci.o \
pci-driver.o search.o pci-sysfs.o rom.o setup-res.o \
- irq.o vpd.o
+ irq.o vpd.o pci-label.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_SYSFS) += slot.o
new file mode 100644
@@ -0,0 +1,274 @@
+/*
+ * Purpose: Export the firmware label associated with a pci network interface
+ * device to sysfs
+ * Copyright (C) 2010 Dell Inc.
+ * by Narendra K <Narendra_K@dell.com>, Jordan Hargrave <Jordan_Hargrave@dell.com>
+ *
+ * This code checks if the pci network device has a related ACPI _DSM. If
+ * available, the code calls the _DSM to retrieve the index and string and
+ * exports them to sysfs. If the ACPI _DSM is not available, it falls back on
+ * SMBIOS. SMBIOS defines type 41 for onboard pci devices. This code retrieves
+ * strings associated with the type 41 and exports it to sysfs.
+ *
+ * Please see http://linux.dell.com/wiki/index.php/Oss/libnetdevname for more
+ * information.
+ */
+
+#include <linux/dmi.h>
+#include <linux/sysfs.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/pci-acpi.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/acpi_bus.h>
+#include "pci.h"
+
+#define DEVICE_LABEL_DSM 0x07
+
+#if defined CONFIG_DMI
+
+struct smbios_attribute {
+ struct attribute attr;
+ ssize_t (*show) (struct device *dev, struct device_attribute *, char *buf);
+ ssize_t (*test) (struct device *dev, char *buf);
+};
+
+static ssize_t
+smbiosname_string_exists(struct device *dev, char *buf)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ const struct dmi_device *dmi;
+ struct dmi_devslot *dslot;
+ int bus;
+ int devfn;
+
+ bus = pdev->bus->number;
+ devfn = pdev->devfn;
+
+ dmi = NULL;
+ while ((dmi = dmi_find_device(DMI_DEV_TYPE_DEVSLOT, NULL, dmi)) != NULL) {
+ dslot = dmi->device_data;
+ if (dslot && dslot->bus == bus && dslot->devfn == devfn) {
+ if (buf)
+ return scnprintf(buf, PAGE_SIZE, "%s\n", dmi->name);
+ return strlen(dmi->name);
+ }
+ }
+
+ return 0;
+}
+
+static ssize_t
+smbiosname_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return smbiosname_string_exists(dev, buf);
+}
+
+struct smbios_attribute smbios_attr_label = {
+ .attr = {.name = "label", .mode = 0444, .owner = THIS_MODULE},
+ .show = smbiosname_show,
+ .test = smbiosname_string_exists,
+};
+
+static int
+pci_create_smbiosname_file(struct pci_dev *pdev)
+{
+ if (smbios_attr_label.test && smbios_attr_label.test(&pdev->dev, NULL)) {
+ if (sysfs_create_file(&pdev->dev.kobj, &smbios_attr_label.attr))
+ return -1;
+ return 0;
+ }
+ return -1;
+}
+
+static int
+pci_remove_smbiosname_file(struct pci_dev *pdev)
+{
+ if (smbios_attr_label.test && smbios_attr_label.test(&pdev->dev, NULL)) {
+ sysfs_remove_file(&pdev->dev.kobj, &smbios_attr_label.attr);
+ return 0;
+ }
+ return -1;
+}
+#else
+static inline int
+pci_create_smbiosname_file(struct pci_dev *pdev)
+{
+ return -1;
+}
+
+static inline int
+pci_remove_smbiosname_file(struct pci_dev *pdev)
+{
+ return -1;
+}
+#endif
+
+#if defined CONFIG_ACPI
+
+static const char device_label_dsm_uuid[] = {
+ 0xD0, 0x37, 0xC9, 0xE5, 0x53, 0x35, 0x7A, 0x4D,
+ 0x91, 0x17, 0xEA, 0x4D, 0x19, 0xC3, 0x43, 0x4D
+};
+
+struct acpi_attribute {
+ struct attribute attr;
+ ssize_t (*show) (struct device *dev, struct device_attribute *attr, char *buf);
+ ssize_t (*test) (struct device *dev, char *buf, char *attribute);
+};
+
+static int
+dsm_get_label(acpi_handle handle, int func,
+ struct acpi_buffer *output,
+ char *buf, char *attribute)
+{
+ struct acpi_object_list input;
+ union acpi_object params[4];
+ union acpi_object *obj;
+ int len = 0;
+
+ int err;
+
+ input.count = 4;
+ input.pointer = params;
+ params[0].type = ACPI_TYPE_BUFFER;
+ params[0].buffer.length = sizeof(device_label_dsm_uuid);
+ params[0].buffer.pointer = (char *)device_label_dsm_uuid;
+ params[1].type = ACPI_TYPE_INTEGER;
+ params[1].integer.value = 0x02;
+ params[2].type = ACPI_TYPE_INTEGER;
+ params[2].integer.value = func;
+ params[3].type = ACPI_TYPE_PACKAGE;
+ params[3].package.count = 0;
+ params[3].package.elements = NULL;
+
+ err = acpi_evaluate_object(handle, "_DSM", &input, output);
+ if (err)
+ return -1;
+
+
+ obj = (union acpi_object *)output->pointer;
+
+ switch (obj->type) {
+ case ACPI_TYPE_PACKAGE:
+ if (obj->package.count != 2)
+ break;
+ len = obj->package.elements[0].integer.value;
+ if (buf) {
+ if (!strncmp(attribute, "index", strlen(attribute)))
+ scnprintf(buf, PAGE_SIZE, "%llu\n",
+ obj->package.elements[0].integer.value);
+ else
+ scnprintf(buf, PAGE_SIZE, "%s\n",
+ obj->package.elements[1].string.pointer);
+ kfree(output->pointer);
+ return strlen(buf);
+ }
+ kfree(output->pointer);
+ return len;
+ break;
+ default:
+ kfree(output->pointer);
+ }
+ return -1;
+}
+
+static ssize_t
+acpi_index_string_exist(struct device *dev, char *buf, char *attribute)
+{
+ struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
+ acpi_handle handle;
+ int length;
+
+ handle = DEVICE_ACPI_HANDLE(dev);
+
+ if (!handle)
+ return -1;
+
+ if ((length = dsm_get_label(handle, DEVICE_LABEL_DSM,
+ &output, buf, attribute)) < 0)
+ return -1;
+
+ return length;
+}
+
+static ssize_t
+acpilabel_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return acpi_index_string_exist(dev, buf, "label");
+}
+
+static ssize_t
+acpiindex_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return acpi_index_string_exist(dev, buf, "index");
+}
+
+struct acpi_attribute acpi_attr_label = {
+ .attr = {.name = "label", .mode = 0444, .owner = THIS_MODULE},
+ .show = acpilabel_show,
+ .test = acpi_index_string_exist,
+};
+
+struct acpi_attribute acpi_attr_index = {
+ .attr = {.name = "index", .mode = 0444, .owner = THIS_MODULE},
+ .show = acpiindex_show,
+ .test = acpi_index_string_exist,
+};
+
+static int
+pci_create_acpi_index_label_files(struct pci_dev *pdev)
+{
+ if (acpi_attr_label.test && acpi_attr_label.test(&pdev->dev, NULL, NULL) > 0) {
+ if (sysfs_create_file(&pdev->dev.kobj, &acpi_attr_label.attr))
+ return -1;
+ if (sysfs_create_file(&pdev->dev.kobj, &acpi_attr_index.attr))
+ return -1;
+ return 0;
+ }
+ return -1;
+}
+
+static int
+pci_remove_acpi_index_label_files(struct pci_dev *pdev)
+{
+ if (acpi_attr_label.test && acpi_attr_label.test(&pdev->dev, NULL, NULL) > 0) {
+ sysfs_remove_file(&pdev->dev.kobj, &acpi_attr_label.attr);
+ sysfs_remove_file(&pdev->dev.kobj, &acpi_attr_index.attr);
+ return 0;
+ }
+ return -1;
+}
+#else
+static inline int
+pci_create_acpi_index_label_files(struct pci_dev *pdev)
+{
+ return -1;
+}
+
+static inline int
+pci_remove_acpi_index_label_files(struct pci_dev *pdev)
+{
+ return -1;
+}
+#endif
+
+int pci_create_firmware_label_files(struct pci_dev *pdev)
+{
+ if (!pci_create_acpi_index_label_files(pdev))
+ return 0;
+ if (!pci_create_smbiosname_file(pdev))
+ return 0;
+ return -ENODEV;
+}
+
+int pci_remove_firmware_label_files(struct pci_dev *pdev)
+{
+ if (!pci_remove_acpi_index_label_files(pdev))
+ return 0;
+ if (!pci_remove_smbiosname_file(pdev))
+ return 0;
+ return -ENODEV;
+}
@@ -1073,6 +1073,8 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
if (retval)
goto err_vga_file;
+ pci_create_firmware_label_files(pdev);
+
return 0;
err_vga_file:
@@ -1140,6 +1142,9 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
kfree(pdev->rom_attr);
}
+
+ pci_remove_firmware_label_files(pdev);
+
}
static int __init pci_sysfs_init(void)
@@ -11,6 +11,8 @@
extern int pci_uevent(struct device *dev, struct kobj_uevent_env *env);
extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
+extern int pci_create_firmware_label_files(struct pci_dev *pdev);
+extern int pci_remove_firmware_label_files(struct pci_dev *pdev);
extern void pci_cleanup_rom(struct pci_dev *dev);
#ifdef HAVE_PCI_MMAP
extern int pci_mmap_fits(struct pci_dev *pdev, int resno,
@@ -20,6 +20,7 @@ enum dmi_device_type {
DMI_DEV_TYPE_SAS,
DMI_DEV_TYPE_IPMI = -1,
DMI_DEV_TYPE_OEM_STRING = -2,
+ DMI_DEV_TYPE_DEVSLOT = -3,
};
struct dmi_header {
@@ -37,6 +38,14 @@ struct dmi_device {
#ifdef CONFIG_DMI
+struct dmi_devslot {
+ struct dmi_device dev;
+ int id;
+ int seg;
+ int bus;
+ int devfn;
+};
+
extern int dmi_check_system(const struct dmi_system_id *list);
const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list);
extern const char * dmi_get_system_info(int field);