xref: /openbmc/linux/Documentation/ABI/testing/sysfs-bus-pci (revision 0994375e)

What:		/sys/bus/pci/drivers/.../bind
Date:		December 2003
Contact:	linux-pci@vger.kernel.org
Description:
		Writing a device location to this file will cause
		the driver to attempt to bind to the device found at
		this location.	This is useful for overriding default
		bindings.  The format for the location is: DDDD:BB:DD.F.
		That is Domain:Bus:Device.Function and is the same as
		found in /sys/bus/pci/devices/.  For example:
		# echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/bind
		(Note: kernels before 2.6.28 may require echo -n).

What:		/sys/bus/pci/drivers/.../unbind
Date:		December 2003
Contact:	linux-pci@vger.kernel.org
Description:
		Writing a device location to this file will cause the
		driver to attempt to unbind from the device found at
		this location.	This may be useful when overriding default
		bindings.  The format for the location is: DDDD:BB:DD.F.
		That is Domain:Bus:Device.Function and is the same as
		found in /sys/bus/pci/devices/. For example:
		# echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/unbind
		(Note: kernels before 2.6.28 may require echo -n).

What:		/sys/bus/pci/drivers/.../new_id
Date:		December 2003
Contact:	linux-pci@vger.kernel.org
Description:
		Writing a device ID to this file will attempt to
		dynamically add a new device ID to a PCI device driver.
		This may allow the driver to support more hardware than
		was included in the driver's static device ID support
		table at compile time.  The format for the device ID is:
		VVVV DDDD SVVV SDDD CCCC MMMM PPPP.  That is Vendor ID,
		Device ID, Subsystem Vendor ID, Subsystem Device ID,
		Class, Class Mask, and Private Driver Data.  The Vendor ID
		and Device ID fields are required, the rest are optional.
		Upon successfully adding an ID, the driver will probe
		for the device and attempt to bind to it.  For example:
		# echo "8086 10f5" > /sys/bus/pci/drivers/foo/new_id

What:		/sys/bus/pci/drivers/.../remove_id
Date:		February 2009
Contact:	Chris Wright <chrisw@sous-sol.org>
Description:
		Writing a device ID to this file will remove an ID
		that was dynamically added via the new_id sysfs entry.
		The format for the device ID is:
		VVVV DDDD SVVV SDDD CCCC MMMM.	That is Vendor ID, Device
		ID, Subsystem Vendor ID, Subsystem Device ID, Class,
		and Class Mask.  The Vendor ID and Device ID fields are
		required, the rest are optional.  After successfully
		removing an ID, the driver will no longer support the
		device.  This is useful to ensure auto probing won't
		match the driver to the device.  For example:
		# echo "8086 10f5" > /sys/bus/pci/drivers/foo/remove_id

What:		/sys/bus/pci/devices/.../vpd
Date:		February 2008
Contact:	Ben Hutchings <bhutchings@solarflare.com>
Description:
		A file named vpd in a device directory will be a
		binary file containing the Vital Product Data for the
		device.  It should follow the VPD format defined in
		PCI Specification 2.1 or 2.2, but users should consider
		that some devices may have malformatted data.  If the
		underlying VPD has a writable section then the
		corresponding section of this file will be writable.