1 What: /sys/bus/pci/drivers/.../bind
3 Contact: linux-pci@vger.kernel.org
5 Writing a device location to this file will cause
6 the driver to attempt to bind to the device found at
7 this location. This is useful for overriding default
8 bindings. The format for the location is: DDDD:BB:DD.F.
9 That is Domain:Bus:Device.Function and is the same as
10 found in /sys/bus/pci/devices/. For example:
11 # echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/bind
12 (Note: kernels before 2.6.28 may require echo -n).
14 What: /sys/bus/pci/drivers/.../unbind
16 Contact: linux-pci@vger.kernel.org
18 Writing a device location to this file will cause the
19 driver to attempt to unbind from the device found at
20 this location. This may be useful when overriding default
21 bindings. The format for the location is: DDDD:BB:DD.F.
22 That is Domain:Bus:Device.Function and is the same as
23 found in /sys/bus/pci/devices/. For example:
24 # echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/unbind
25 (Note: kernels before 2.6.28 may require echo -n).
27 What: /sys/bus/pci/drivers/.../new_id
29 Contact: linux-pci@vger.kernel.org
31 Writing a device ID to this file will attempt to
32 dynamically add a new device ID to a PCI device driver.
33 This may allow the driver to support more hardware than
34 was included in the driver's static device ID support
35 table at compile time. The format for the device ID is:
36 VVVV DDDD SVVV SDDD CCCC MMMM PPPP. That is Vendor ID,
37 Device ID, Subsystem Vendor ID, Subsystem Device ID,
38 Class, Class Mask, and Private Driver Data. The Vendor ID
39 and Device ID fields are required, the rest are optional.
40 Upon successfully adding an ID, the driver will probe
41 for the device and attempt to bind to it. For example:
42 # echo "8086 10f5" > /sys/bus/pci/drivers/foo/new_id
44 What: /sys/bus/pci/drivers/.../remove_id
46 Contact: Chris Wright <chrisw@sous-sol.org>
48 Writing a device ID to this file will remove an ID
49 that was dynamically added via the new_id sysfs entry.
50 The format for the device ID is:
51 VVVV DDDD SVVV SDDD CCCC MMMM. That is Vendor ID, Device
52 ID, Subsystem Vendor ID, Subsystem Device ID, Class,
53 and Class Mask. The Vendor ID and Device ID fields are
54 required, the rest are optional. After successfully
55 removing an ID, the driver will no longer support the
56 device. This is useful to ensure auto probing won't
57 match the driver to the device. For example:
58 # echo "8086 10f5" > /sys/bus/pci/drivers/foo/remove_id
60 What: /sys/bus/pci/rescan
62 Contact: Linux PCI developers <linux-pci@vger.kernel.org>
64 Writing a non-zero value to this attribute will
65 force a rescan of all PCI buses in the system, and
66 re-discover previously removed devices.
67 Depends on CONFIG_HOTPLUG.
69 What: /sys/bus/pci/devices/.../vpd
71 Contact: Ben Hutchings <bhutchings@solarflare.com>
73 A file named vpd in a device directory will be a
74 binary file containing the Vital Product Data for the
75 device. It should follow the VPD format defined in
76 PCI Specification 2.1 or 2.2, but users should consider
77 that some devices may have malformatted data. If the
78 underlying VPD has a writable section then the
79 corresponding section of this file will be writable.
81 What: /sys/bus/pci/devices/.../virtfnN
83 Contact: Yu Zhao <yu.zhao@intel.com>
85 This symbolic link appears when hardware supports the SR-IOV
86 capability and the Physical Function driver has enabled it.
87 The symbolic link points to the PCI device sysfs entry of the
88 Virtual Function whose index is N (0...MaxVFs-1).
90 What: /sys/bus/pci/devices/.../dep_link
92 Contact: Yu Zhao <yu.zhao@intel.com>
94 This symbolic link appears when hardware supports the SR-IOV
95 capability and the Physical Function driver has enabled it,
96 and this device has vendor specific dependencies with others.
97 The symbolic link points to the PCI device sysfs entry of
98 Physical Function this device depends on.
100 What: /sys/bus/pci/devices/.../physfn
102 Contact: Yu Zhao <yu.zhao@intel.com>
104 This symbolic link appears when a device is a Virtual Function.
105 The symbolic link points to the PCI device sysfs entry of the
106 Physical Function this device associates with.