Linux pci device lists
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 text.
OPTIONS
-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 [[[[
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:
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 Force use of the linux_proc access method, using 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 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.