77c27c7b49
This patch adds an attribute named "remove" to a PCI device's sysfs directory. Writing a non-zero value to this attribute will remove the PCI device and any children of it. Trent Piepho wrote the original implementation and documentation. Thanks to Vegard Nossum for testing under kmemcheck and finding locking issues with the sysfs interface. Cc: Trent Piepho <xyzzy@speakeasy.org> Tested-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
115 lines
4.6 KiB
Plaintext
115 lines
4.6 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/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/.../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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