pcilib

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.

mmio-conf1

Direct hardware access via Intel configuration mechanism 1 via memory-mapped I/O. Mostly used on non-i386 platforms. Requires root privileges. Warning: This method needs to be properly configured via the mmio-conf1.addrs parameter.

mmio-conf1-ext

Direct hardware access via Extended PCIe Intel configuration mechanism 1 via memory-mapped I/O. Mostly used on non-i386 platforms. Requires root privileges. Warning: This method needs to be properly configured via the mmio-conf1-ext.addrs parameter.

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.

win32-sysdbg

Access to the PCI configuration space via NT SysDbg interface on Windows systems. Process needs to have Debug privilege, which local Administrators have by default. Not available on 64-bit systems and neither on recent 32-bit systems. Only devices from the first domain are accessible and only first 256 bytes of the PCI configuration space is accessible via this method.

win32-kldbg

Access to the PCI configuration space via Kernel Local Debugging Driver kldbgdrv.sys. This driver is not part of the Windows system but is part of the Microsoft WinDbg tool. It is required to have kldbgdrv.sys driver installed in the system32 directory or to have windbg.exe or kd.exe binary in PATH. kldbgdrv.sys driver has some restrictions. Process needs to have Debug privilege and Windows system has to be booted with Debugging option. Debugging option can be enabled by calling (takes effect after next boot): bcdedit /debug on

Download links for WinDbg 6.12.2.633 standalone installer from Microsoft Windows SDK for Windows 7 and .NET Framework 4:
amd64: https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools_amd64/dbg_amd64.msi
ia64: https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools_ia64/dbg_ia64.msi
x86: https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools/dbg_x86.msi

Archived download links of previous WinDbg versions:
https://web.archive.org/web/20110221133326/https://www.microsoft.com/whdc/devtools/debugging/installx86.mspx
https://web.archive.org/web/20110214012715/https://www.microsoft.com/whdc/devtools/debugging/install64bit.mspx

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.

devmem.path

Path to the /dev/mem device.

mmio-conf1.addrs

Physical addresses of memory-mapped I/O ports for Intel configuration mechanism 1. CF8 (address) and CFC (data) I/O port addresses are separated by slash and multiple addresses for different PCI domains are separated by commas. Format: 0xaddr1/0xdata1,0xaddr2/0xdata2,...

mmio-conf1-ext.addrs

Physical addresses of memory-mapped I/O ports for Extended PCIe Intel configuration mechanism 1. It has same format as mmio-conf1.addrs parameter.

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 AT ucw DOT cz>.