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).
- 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
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).
- 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.
- net.domain
- DNS domain containing the ID database.
- net.cache_name
- Name of the file used for caching of resolved ID's.
- hwdb.disable
- Disable use of HWDB if set to a non-zero value.
lspci(8),
setpci(8),
pci.ids(5),
update-pciids(8)
The PCI Utilities are maintained by Martin Mares <
[email protected]>.