pcilib(7)                 (31 May 2020)                 pcilib(7)

     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 stan-
               dard header of the config space is available to all
               users, the rest only to root. Supports extended config-
               uration space, PCI domains, VPD (from Linux 2.6.26),
               physical slots (also since Linux 2.6.26) and informa-
               tion 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 mecha-
               nism 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 mecha-
               nism 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 privi-
               leges.

          aix-device

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               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 privi-
               leges.

          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 over-
          ride 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
          net.domain
               DNS domain containing the ID database.

          net.cache_name

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

        Parameters for resolving of ID's via
          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>.

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