911e1c9b05
This patch exports SMBIOS provided firmware instance and label of onboard PCI devices to sysfs. New files are: /sys/bus/pci/devices/.../label which contains the firmware name for the device in question, and /sys/bus/pci/devices/.../index which contains the firmware device type instance for the given device. 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>
168 lines
6.4 KiB
Text
168 lines
6.4 KiB
Text
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/drivers/.../remove_id
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Date: February 2009
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Contact: Chris Wright <chrisw@sous-sol.org>
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Description:
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Writing a device ID to this file will remove an ID
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that was dynamically added via the new_id sysfs entry.
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The format for the device ID is:
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VVVV DDDD SVVV SDDD CCCC MMMM. That is Vendor ID, Device
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ID, Subsystem Vendor ID, Subsystem Device ID, Class,
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and Class Mask. The Vendor ID and Device ID fields are
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required, the rest are optional. After successfully
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removing an ID, the driver will no longer support the
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device. This is useful to ensure auto probing won't
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match the driver to the device. For example:
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# echo "8086 10f5" > /sys/bus/pci/drivers/foo/remove_id
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What: /sys/bus/pci/rescan
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Date: January 2009
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Contact: Linux PCI developers <linux-pci@vger.kernel.org>
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Description:
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Writing a non-zero value to this attribute will
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force a rescan of all PCI buses in the system, and
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re-discover previously removed devices.
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Depends on CONFIG_HOTPLUG.
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What: /sys/bus/pci/devices/.../remove
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Date: January 2009
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Contact: Linux PCI developers <linux-pci@vger.kernel.org>
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Description:
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Writing a non-zero value to this attribute will
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hot-remove the PCI device and any of its children.
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Depends on CONFIG_HOTPLUG.
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What: /sys/bus/pci/devices/.../rescan
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Date: January 2009
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Contact: Linux PCI developers <linux-pci@vger.kernel.org>
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Description:
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Writing a non-zero value to this attribute will
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force a rescan of the device's parent bus and all
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child buses, and re-discover devices removed earlier
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from this part of the device tree.
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Depends on CONFIG_HOTPLUG.
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What: /sys/bus/pci/devices/.../reset
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Date: July 2009
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Contact: Michael S. Tsirkin <mst@redhat.com>
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Description:
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Some devices allow an individual function to be reset
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without affecting other functions in the same device.
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For devices that have this support, a file named reset
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will be present in sysfs. Writing 1 to this file
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will perform reset.
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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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What: /sys/bus/pci/devices/.../virtfnN
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Date: March 2009
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Contact: Yu Zhao <yu.zhao@intel.com>
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Description:
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This symbolic link appears when hardware supports the SR-IOV
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capability and the Physical Function driver has enabled it.
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The symbolic link points to the PCI device sysfs entry of the
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Virtual Function whose index is N (0...MaxVFs-1).
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What: /sys/bus/pci/devices/.../dep_link
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Date: March 2009
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Contact: Yu Zhao <yu.zhao@intel.com>
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Description:
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This symbolic link appears when hardware supports the SR-IOV
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capability and the Physical Function driver has enabled it,
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and this device has vendor specific dependencies with others.
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The symbolic link points to the PCI device sysfs entry of
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Physical Function this device depends on.
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What: /sys/bus/pci/devices/.../physfn
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Date: March 2009
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Contact: Yu Zhao <yu.zhao@intel.com>
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Description:
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This symbolic link appears when a device is a Virtual Function.
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The symbolic link points to the PCI device sysfs entry of the
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Physical Function this device associates with.
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What: /sys/bus/pci/slots/.../module
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Date: June 2009
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Contact: linux-pci@vger.kernel.org
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Description:
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This symbolic link points to the PCI hotplug controller driver
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module that manages the hotplug slot.
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What: /sys/bus/pci/devices/.../label
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Date: July 2010
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Contact: Narendra K <narendra_k@dell.com>, linux-bugs@dell.com
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Description:
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Reading this attribute will provide the firmware
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given name(SMBIOS type 41 string) of the PCI device.
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The attribute will be created only if the firmware
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has given a name to the PCI device.
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Users:
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Userspace applications interested in knowing the
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firmware assigned name of the PCI device.
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What: /sys/bus/pci/devices/.../index
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Date: July 2010
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Contact: Narendra K <narendra_k@dell.com>, linux-bugs@dell.com
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Description:
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Reading this attribute will provide the firmware
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given instance(SMBIOS type 41 device type instance)
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of the PCI device. The attribute will be created
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only if the firmware has given a device type instance
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to the PCI device.
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Users:
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Userspace applications interested in knowing the
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firmware assigned device type instance of the PCI
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device that can help in understanding the firmware
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intended order of the PCI device.
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