• Narendra_K@Dell.com's avatar
    PCI: Export ACPI _DSM provided firmware instance number and string name to sysfs · 6058989b
    Narendra_K@Dell.com authored
    
    
    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: default avatarMatthew Garrett <mjg@redhat.com>
    Signed-off-by: default avatarJordan Hargrave <jordan_hargrave@dell.com>
    Signed-off-by: default avatarNarendra K <narendra_k@dell.com>
    Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
    6058989b