PCI: Export ACPI _DSM provided firmware instance number and string name to sysfs
authorNarendra_K@Dell.com <Narendra_K@Dell.com>
Wed, 2 Mar 2011 17:04:17 +0000 (22:04 +0530)
committerJesse Barnes <jbarnes@virtuousgeek.org>
Fri, 4 Mar 2011 18:41:56 +0000 (10:41 -0800)
commit6058989bad05b82e78baacce69ec14f27a11b5fd
tree26353578e7e9a95d2ea101cd9a8e656d85ddd829
parentcdb9755849fbaf2bb9c0a009ba5baa817a0f152d
PCI: Export ACPI _DSM provided firmware instance number and string name to sysfs

This patch exports ACPI _DSM (Device Specific Method) provided firmware
instance number and string name of PCI devices as defined by 'PCI
Firmware Specification Revision 3.1' section 4.6.7.( DSM for Naming a
PCI or PCI Express Device Under Operating Systems) to sysfs.

New files created are:
  /sys/bus/pci/devices/.../label which contains the firmware name for
the device in question, and
  /sys/bus/pci/devices/.../acpi_index which contains the firmware device type
instance for the given device.

cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/acpi_index
1
cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/label
Embedded Broadcom 5709C NIC 1

cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.1/acpi_index
2
cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.1/label
Embedded Broadcom 5709C NIC 2

The ACPI _DSM provided firmware 'instance number' and 'string name' will
be given priority if the firmware also provides 'SMBIOS type 41 device
type instance and string'.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Jordan Hargrave <jordan_hargrave@dell.com>
Signed-off-by: Narendra K <narendra_k@dell.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Documentation/ABI/testing/sysfs-bus-pci
drivers/pci/Kconfig
drivers/pci/Makefile
drivers/pci/pci-label.c
drivers/pci/pci.h