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lspci - Unix, Linux Command

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NAME

lspci - list all PCI devices

SYNOPSIS

lspci [options]

DESCRIPTION

lspci is a utility for displaying information about all PCI buses in the system and all devices connected to them.

By default, it shows a brief list of devices. Use the options described below to request either a more verbose output or output intended for parsing by other programs.

If you are going to report bugs in PCI device drivers or in lspci itself, please include output of "lspci -vvx" or even better "lspci -vvxxx" (however, see below for possible caveats).

Some parts of the output, especially in the highly verbose modes, is probably intelligible only to experienced PCI hackers. For the exact definitions of the fields, please consult either the PCI specifications or the header.h and /usr/include/linux/pci.h include files.

Access to some parts of the PCI configuration space is restricted to root on many operating systems, so the features of lspci available to normal users are limited. However, lspci tries its best to display as much as available and mark all other information with <access denied> text.

OPTIONS

TagDescription
-v Be verbose and display detailed information about all devices.
-vv Be very verbose and display more details. This level includes everything deemed useful.
-vvv Be even more verbose and display everything we are able to parse, even if it doesn’t look interesting at all (e.g., undefined memory regions).
-n Show PCI vendor and device codes as numbers instead of looking them up in the PCI ID list.
-x Show hexadecimal dump of the standard part of the configuration space (the first 64 bytes or 128 bytes for CardBus bridges).
-xxx Show hexadecimal dump of the whole PCI configuration space. It is available only to root as several PCI devices crash when you try to read some parts of the config space (this behavior probably doesn’t violate the PCI standard, but it’s at least very stupid). However, such devices are rare, so you needn’t worry much.
-xxxx Show hexadecimal dump of the extended (4096-byte) PCI configuration space available on PCI-X 2.0 and PCI Express buses.
-b Bus-centric view. Show all IRQ numbers and addresses as seen by the cards on the PCI bus instead of as seen by the kernel.
-t Show a tree-like diagram containing all buses, bridges, devices and connections between them.
-s [[[[<domain>]:]<bus>]:][<slot>][.[<func>]]
  Show only devices in the specified domain (in case your machine has several host bridges, they can either share a common bus number space or each of them can address a PCI domain of its own; domains are numbered from 0 to ffff), bus (0 to ff), slot (0 to 1f) and function (0 to 7). Each component of the device address can be omitted or set to "*", both meaning "any value". All numbers are hexadecimal. E.g., "0:" means all devices on bus 0, "0" means all functions of device 0 on any bus, "0.3" selects third function of device 0 on all buses and ".4" shows only the fourth function of each device.
-d [<vendor>]:[<device>]
  Show only devices with specified vendor and device ID. Both ID’s are given in hexadecimal and may be omitted or given as "*", both meaning "any value".
-i <file>
  Use <file> as the PCI ID list instead of /usr/share/hwdata/pci.ids.
-m Dump PCI device data in machine readable form (both normal and verbose format supported) for easy parsing by scripts. Please don’t use any other formats for this purpose, they are likely to change in the future versions of lspci.
-D Always show PCI domain numbers. By default, lspci suppresses them on machines which have only domain 0.
-M Invoke bus mapping mode which performs a thorough scan of all PCI devices, including those behind misconfigured bridges etc. This option is available only to root and it gives meaningful results only if combined with direct hardware access mode (otherwise the results are identical to normal listing modes, modulo bugs in lspci). Please note that the bus mapper doesn’t support PCI domains and scans only domain 0.
--version
  Shows lspci version. This option should be used stand-alone.

PCILIB AND ITS OPTIONS

The PCI utilities use PCILIB (a portable library providing platform-independent functions for PCI configuration space access) to talk to the PCI cards. It supports the following access methods:

TagDescription
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 and PCI domains.
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 and Windows. Requires root privileges.
intel_conf2
  Direct hardware access via Intel configuration mechanism 2. Available on i386 and compatibles on Linux, Solaris/x86 and GNU Hurd. Requires root privileges. Warning: This method is able to address only 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.

By default, PCILIB uses the first available access method and displays no debugging messages, but you can use the following switches to control its behavior:

-P <dir>
  Force use of the linux_proc access method, using <dir> instead of /proc/bus/pci.
-H1 Use direct hardware access via Intel configuration mechanism 1.
-H2 Use direct hardware access via Intel configuration mechanism 2.
-F <file>
  Extract all information from given file containing output of lspci -x. This is very useful for analysis of user-supplied bug reports, because you can display the hardware configuration in any way you want without disturbing the user with requests for more dumps.
-G Increase debug level of the library.

FILES

TagDescription
/usr/share/hwdata/pci.ids
  A list of all known PCI ID’s (vendors, devices, classes and subclasses). Maintained at http://pciids.sourceforge.net/, use the update-pciids utility to download the most recent version.
/usr/share/hwdata/pci.ids.d/*.ids
  Modified by Red Hat, so that lspci also takes all /usr/share/hwdata/pci.ids.d/*.ids files into account.
/proc/bus/pci
  An interface to PCI bus configuration space provided by the post-2.1.82 Linux kernels. Contains per-bus subdirectories with per-card config space files and a devices file containing a list of all PCI devices.

SEE ALSO

AUTHOR

The PCI Utilities are maintained by Martin Mares <mj@ucw.cz>.
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