NAME

       pcilib - a library for accessing PCI devices

DESCRIPTION

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

ACCESS METHODS

       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).

       linux-sysfs
              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.

       linux-proc
              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.

       intel-conf1
              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.

       intel-conf2
              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 cases.

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

       aix-device
              Access method used on AIX. Requires root privileges.

       nbsd-libpci
              The /dev/pci0 device on NetBSD accessed using the local libpci library.

       obsd-device
              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.

PARAMETERS

       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
       lspci).

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

       fbsd.path
              Path to the FreeBSD PCI device.

       nbsd.path
              Path to the NetBSD PCI device.

       obsd.path
              Path to the OpenBSD PCI device.

       proc.path
              Path to the procfs bus tree.

       sysfs.path
              Path to the sysfs device tree.

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

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

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

SEE ALSO

       lspci(8), setpci(8), pci.ids(5), update-pciids(8)

AUTHOR

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