pcilib - a library for accessing PCI devices


   The PCI library (also known as pcilib and libpci) is a portable library
   for accessing PCI devices and their configuration space.


   The library supports a variety of methods to access  the  configuration
   space  on  different  operating systems. By default, the first matching
   method in this list is used, but you can specify override the  decision
   (see the -A switch of lspci).

          The  /sys filesystem on Linux 2.6 and newer. The standard header
          of the config space is available to all users, the rest only  to
          root.  Supports  extended  configuration space, PCI domains, VPD
          (from Linux 2.6.26), physical slots (also  since  Linux  2.6.26)
          and information on attached kernel drivers.

          The  /proc/bus/pci  interface  supported by Linux 2.1 and newer.
          The standard header of the config  space  is  available  to  all
          users, the rest only to root.

          Direct  hardware  access  via  Intel  configuration mechanism 1.
          Available on i386 and compatibles  on  Linux,  Solaris/x86,  GNU
          Hurd, Windows, BeOS and Haiku. Requires root privileges.

          Direct  hardware  access  via  Intel  configuration mechanism 2.
          Available on i386 and compatibles  on  Linux,  Solaris/x86,  GNU
          Hurd,   Windows,  BeOS  and  Haiku.  Requires  root  privileges.
          Warning: This method is  able  to  address  only  the  first  16
          devices  on  any  bus and it seems to be very unreliable in many

          The /dev/pci device on FreeBSD. Requires root privileges.

          Access method used on AIX. Requires root privileges.

          The /dev/pci0 device on NetBSD accessed using the  local  libpci

          The /dev/pci device on OpenBSD. Requires root privileges.

   dump   Read  the  contents  of  configuration  registers  from  a  file
          specified in the dump.name parameter. The format corresponds  to
          the output of lspci -x.

   darwin Access method used on Mac OS X / Darwin. Must be run as root and
          the system must have been booted with debug=0x144.


   The library is controlled  by  several  parameters.  They  should  have
   sensible  default  values, but in case you want to do something unusual
   (or even something weird), you can override them (see the -O switch  of

   Parameters of specific access methods
          Name of the bus dump file to read from.

          Path to the FreeBSD PCI device.

          Path to the NetBSD PCI device.

          Path to the OpenBSD PCI device.

          Path to the procfs bus tree.

          Path to the sysfs device tree.

   Parameters for resolving of ID's via DNS
          DNS domain containing the ID database.

          Name of the file used for caching of resolved ID's.

   Parameters for resolving of ID's via UDEV's HWDB
          Disable use of HWDB if set to a non-zero value.


   lspci(8), setpci(8), update-pciids(8)


   The PCI Utilities are maintained by Martin Mares <mj@ucw.cz>.


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