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 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.

win32-cfgmgr32
    Device listing on Windows systems using the Windows Configuration Manager via cfgmgr32.dll system library. This method does not require any special Administrator rights or privileges. Configuration Manager provides only basic information about devices, assigned resources and device tree structure. There is no access to the PCI configuration space but libpci provides read-only virtual emulation based on information from Configuration Manager. Starting with Windows 8 (NT 6.2) it is not possible to retrieve resources from 32-bit application or library on 64-bit system.

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>.