d22157b3d7
Add sysfs ABI docs for driver entries bind, unbind and new_id. These entries are pretty old, from 2.6.0 onwards AFAIK, so this documents current behaviour. Signed-off-by: Chris Wright <chrisw@sous-sol.org> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Jesse Barnes <jbarnes@hobbes.lan>
55 lines
2.3 KiB
Plaintext
55 lines
2.3 KiB
Plaintext
What: /sys/bus/pci/drivers/.../bind
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Date: December 2003
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Contact: linux-pci@vger.kernel.org
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Description:
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Writing a device location to this file will cause
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the driver to attempt to bind to the device found at
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this location. This is useful for overriding default
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bindings. The format for the location is: DDDD:BB:DD.F.
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That is Domain:Bus:Device.Function and is the same as
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found in /sys/bus/pci/devices/. For example:
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# echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/bind
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(Note: kernels before 2.6.28 may require echo -n).
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What: /sys/bus/pci/drivers/.../unbind
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Date: December 2003
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Contact: linux-pci@vger.kernel.org
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Description:
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Writing a device location to this file will cause the
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driver to attempt to unbind from the device found at
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this location. This may be useful when overriding default
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bindings. The format for the location is: DDDD:BB:DD.F.
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That is Domain:Bus:Device.Function and is the same as
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found in /sys/bus/pci/devices/. For example:
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# echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/unbind
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(Note: kernels before 2.6.28 may require echo -n).
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What: /sys/bus/pci/drivers/.../new_id
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Date: December 2003
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Contact: linux-pci@vger.kernel.org
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Description:
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Writing a device ID to this file will attempt to
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dynamically add a new device ID to a PCI device driver.
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This may allow the driver to support more hardware than
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was included in the driver's static device ID support
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table at compile time. The format for the device ID is:
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VVVV DDDD SVVV SDDD CCCC MMMM PPPP. That is Vendor ID,
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Device ID, Subsystem Vendor ID, Subsystem Device ID,
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Class, Class Mask, and Private Driver Data. The Vendor ID
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and Device ID fields are required, the rest are optional.
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Upon successfully adding an ID, the driver will probe
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for the device and attempt to bind to it. For example:
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# echo "8086 10f5" > /sys/bus/pci/drivers/foo/new_id
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What: /sys/bus/pci/devices/.../vpd
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Date: February 2008
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Contact: Ben Hutchings <bhutchings@solarflare.com>
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Description:
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A file named vpd in a device directory will be a
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binary file containing the Vital Product Data for the
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device. It should follow the VPD format defined in
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PCI Specification 2.1 or 2.2, but users should consider
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that some devices may have malformatted data. If the
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underlying VPD has a writable section then the
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corresponding section of this file will be writable.
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