From 6058989bad05b82e78baacce69ec14f27a11b5fd Mon Sep 17 00:00:00 2001 From: "Narendra_K@Dell.com" Date: Wed, 2 Mar 2011 22:34:17 +0530 Subject: 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 Signed-off-by: Jordan Hargrave Signed-off-by: Narendra K Signed-off-by: Jesse Barnes --- Documentation/ABI/testing/sysfs-bus-pci | 31 ++++++++++++++++++++++++------- 1 file changed, 24 insertions(+), 7 deletions(-) (limited to 'Documentation') diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci index f979d825d112..36bf454ba855 100644 --- a/Documentation/ABI/testing/sysfs-bus-pci +++ b/Documentation/ABI/testing/sysfs-bus-pci @@ -145,9 +145,11 @@ Date: July 2010 Contact: Narendra K , linux-bugs@dell.com Description: Reading this attribute will provide the firmware - given name(SMBIOS type 41 string) of the PCI device. - The attribute will be created only if the firmware - has given a name to the PCI device. + given name (SMBIOS type 41 string or ACPI _DSM string) of + the PCI device. The attribute will be created only + if the firmware has given a name to the PCI device. + ACPI _DSM string name will be given priority if the + system firmware provides SMBIOS type 41 string also. Users: Userspace applications interested in knowing the firmware assigned name of the PCI device. @@ -157,12 +159,27 @@ Date: July 2010 Contact: Narendra K , 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 a device type instance - to the PCI device. + 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. Users: Userspace applications interested in knowing the firmware assigned device type instance of the PCI device that can help in understanding the firmware intended order of the PCI device. + +What: /sys/bus/pci/devices/.../acpi_index +Date: July 2010 +Contact: Narendra K , linux-bugs@dell.com +Description: + Reading this attribute will provide the firmware + given instance (ACPI _DSM instance number) of the PCI device. + The attribute will be created only if the firmware has given + an instance number to the PCI device. ACPI _DSM instance number + will be given priority if the system firmware provides SMBIOS + type 41 device type instance also. +Users: + Userspace applications interested in knowing the + firmware assigned instance number of the PCI + device that can help in understanding the firmware + intended order of the PCI device. -- cgit v1.2.1