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NAME | DESCRIPTION | ACCESS METHODS | PARAMETERS | SEE ALSO | AUTHOR | COLOPHON |
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pcilib(7) The PCI Utilities pcilib(7)
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.
ecam Direct hardware access via PCIe ECAM (Enhanced
Configuration Access Mechanism). Available on all PCIe-
compliant hardware. Requires root privileges and access to
physical memory (on Linux systems disabled
CONFIG_STRICT_DEVMEM option). On ACPI compatible systems
is ECAM mapping read from the MCFG table specified by the
ecam.acpimcfg parameter. On EFI compatible systems, ACPI
MCFG table can be located in physical memory via EFI
system table specified by the ecam.efisystab parameter. On
FreeBSD/NetBSD systems, physical address of ACPI MCFG
table can be located by kenv or sysctl interface when the
ecam.bsd parameter is not disabled. On x86 BIOS compatible
systems, ACPI MCFG table can be located in physical memory
by scanning x86 BIOS memory when the ecam.x86bios
parameter is not disabled. Alternatively ECAM mappings can
be specified by the ecam.addrs parameter which takes
precedence over ACPI MCFG table. This option is required
on systems without ACPI and also on systems without EFI or
x86 BIOS.
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 either tries to use other
access method to access configuration space or it provides
read-only virtual emulation based on information from
Configuration Manager. Other access method can be chosen
by the win32.cfgmethod parameter. By default the first
working one is selected (if any). 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).
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.
ecam.addrs
Physical addresses of PCIe ECAM mappings. Each mapping
must contains first PCI bus number and physical address
where mapping starts. And then it may contain the length
of the mapping, the last PCI bus number and PCI domain
number. When the last PCI bus number is not provided then
it is calculated from the length of the mapping or it is
assumed 0xff. When length of the mapping is provided then
it is calculated from the last PCI bus number. And when
PCI domain is not provided then 0x0 is assumed. All
numbers must be supplied in hexadecimal form (leading
prefix 0x is not required). Multiple mappings are
separated by commas. Format:
[domain:]start_bus[-end_bus]:start_addr[+length],...
ecam.acpimcfg
Path to the ACPI MCFG table. Processed by the glob(3)
function, so it may contain wildcards (*).
ecam.efisystab
Path to the EFI system table.
ecam.bsd
When not set to 0 then use BSD kenv or sysctl to find ACPI
MCFG table. Default value is 1 on BSD systems.
ecam.x86bios
When not set to 0 then scan x86 BIOS memory for ACPI MCFG
table. Default value is 1 on x86 systems.
win32.cfgmethod
Config space access method to use with win32-cfgmgr32 on
Windows systems. Value auto or an empty string selects the
first access method which supports access to the config
space on Windows. Value win32-cfgmgr32 or none only builds
a read-only virtual emulated config space with information
from the Configuration Manager.
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.
lspci(8), setpci(8), pci.ids(5), update-pciids(8)
The PCI Utilities are maintained by Martin Mares <[email protected]>.
This page is part of the pciutils (PCI utilities) project.
Information about the project can be found at
⟨http:https://mj.ucw.cz/sw/pciutils/⟩. If you have a bug report for
this manual page, send it to [email protected]. This
page was obtained from the project's upstream Git repository
⟨git:https://git.kernel.org/pub/scm/utils/pciutils/pciutils.git⟩ on
2023-12-22. (At that time, the date of the most recent commit
that was found in the repository was 2023-12-08.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to [email protected]
pciutils-3.10.0 01 May 2023 pcilib(7)
Pages that refer to this page: pci.ids(5), lspci(8), setpci(8)
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HTML rendering created 2023-12-22 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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