Documentation/ABI/testing/sysfs-bus-pci

   1 What:           /sys/bus/pci/drivers/.../bind
   2 Date:           December 2003
   3 Contact:        linux-pci@vger.kernel.org
   4 Description:
   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).
  13
  14 What:           /sys/bus/pci/drivers/.../unbind
  15 Date:           December 2003
  16 Contact:        linux-pci@vger.kernel.org
  17 Description:
  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).
  26
  27 What:           /sys/bus/pci/drivers/.../new_id
  28 Date:           December 2003
  29 Contact:        linux-pci@vger.kernel.org
  30 Description:
  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
  43
  44 What:           /sys/bus/pci/drivers/.../remove_id
  45 Date:           February 2009
  46 Contact:        Chris Wright <chrisw@sous-sol.org>
  47 Description:
  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
  59
  60 What:           /sys/bus/pci/rescan
  61 Date:           January 2009
  62 Contact:        Linux PCI developers <linux-pci@vger.kernel.org>
  63 Description:
  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.
  68
  69 What:           /sys/bus/pci/devices/.../remove
  70 Date:           January 2009
  71 Contact:        Linux PCI developers <linux-pci@vger.kernel.org>
  72 Description:
  73                 Writing a non-zero value to this attribute will
  74                 hot-remove the PCI device and any of its children.
  75                 Depends on CONFIG_HOTPLUG.
  76
  77 What:           /sys/bus/pci/devices/.../rescan
  78 Date:           January 2009
  79 Contact:        Linux PCI developers <linux-pci@vger.kernel.org>
  80 Description:
  81                 Writing a non-zero value to this attribute will
  82                 force a rescan of the device's parent bus and all
  83                 child buses, and re-discover devices removed earlier
  84                 from this part of the device tree.
  85                 Depends on CONFIG_HOTPLUG.
  86
  87 What:           /sys/bus/pci/devices/.../vpd
  88 Date:           February 2008
  89 Contact:        Ben Hutchings <bhutchings@solarflare.com>
  90 Description:
  91                 A file named vpd in a device directory will be a
  92                 binary file containing the Vital Product Data for the
  93                 device.  It should follow the VPD format defined in
  94                 PCI Specification 2.1 or 2.2, but users should consider
  95                 that some devices may have malformatted data.  If the
  96                 underlying VPD has a writable section then the
  97                 corresponding section of this file will be writable.
  98
  99 What:           /sys/bus/pci/devices/.../virtfnN
 100 Date:           March 2009
 101 Contact:        Yu Zhao <yu.zhao@intel.com>
 102 Description:
 103                 This symbolic link appears when hardware supports the SR-IOV
 104                 capability and the Physical Function driver has enabled it.
 105                 The symbolic link points to the PCI device sysfs entry of the
 106                 Virtual Function whose index is N (0...MaxVFs-1).
 107
 108 What:           /sys/bus/pci/devices/.../dep_link
 109 Date:           March 2009
 110 Contact:        Yu Zhao <yu.zhao@intel.com>
 111 Description:
 112                 This symbolic link appears when hardware supports the SR-IOV
 113                 capability and the Physical Function driver has enabled it,
 114                 and this device has vendor specific dependencies with others.
 115                 The symbolic link points to the PCI device sysfs entry of
 116                 Physical Function this device depends on.
 117
 118 What:           /sys/bus/pci/devices/.../physfn
 119 Date:           March 2009
 120 Contact:        Yu Zhao <yu.zhao@intel.com>
 121 Description:
 122                 This symbolic link appears when a device is a Virtual Function.
 123                 The symbolic link points to the PCI device sysfs entry of the
 124                 Physical Function this device associates with.