lspci (8)


       lspci - list all PCI devices


       lspci [options]


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

       To make use of all the features of this program, you need to have Linux
       kernel 2.1.82 or newer which supports the /proc/bus/pci interface. With
       older kernels, the PCI utilities have to  use  direct  hardware  access
       which  is available only to root and it suffers from numerous race con-
       ditions and other problems.

       If you are going to report bugs in  PCI  device  drivers  or  in  lspci
       itself, please include output of "lspci -vvx".


       -v     Tells lspci to be verbose and display detailed information about
              all devices.

       -vv    Tells lspci to be very verbose and display even more information
              (actually  everything the PCI device is able to tell). The exact
              meaning of these data is not explained in this manual  page,  if
              you  want  to know more, consult /usr/include/linux/pci.h or the
              PCI specs.

       -n     Show PCI vendor and device codes as numbers instead  of  looking
              them up in the PCI ID database.

       -x     Show hexadecimal dump of first 64 bytes of the PCI configuration
              space (the standard header). Useful for debugging of drivers and
              lspci itself.

       -xxx   Show  hexadecimal  dump of whole PCI configuration space. Avail-
              able only for root as several PCI devices crash when you try  to
              read  undefined  portions  of  the  config space (this behaviour
              probably doesn't violate the PCI standard,  but  it's  at  least
              very stupid).

       -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 [[<bus>]:][<slot>][.[<func>]]
              Show only devices in specified bus, slot and function. Each com-
              ponent of the device address can be omitted or set as "*"  mean-
              ing  "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

       -p <dir>
              Use <dir> as directory containing PCI bus information instead of

       -m     Dump PCI device data in machine readable form (both  normal  and
              verbose format supported) for easy parsing by scripts.

       -M     Invoke  bus mapping mode which scans the bus extensively to find
              all devices including those behind  misconfigured  bridges  etc.
              Please  note  that this is intended only for debugging and as it
              can crash the machine (only in case of buggy devices, but unfor-
              tunately  these  happen  to exist), it's available only to root.
              Also using -M on PCI access methods which don't  directly  touch
              the  hardware has no sense since the results are (modulo bugs in
              lspci) identical to normal listing modes.

              Shows lspci version. This option should be used standalone.


       The PCI utilities use PCILIB (a portable  library  providing  platform-
       independent  functions  for  PCI configuration space access) to talk to
       the PCI cards. The following options control parameters of the library,
       especially  what  access  method  it uses.  By default, PCILIB uses the
       first available access method and displays no debugging messages.  Each
       switch  is  accompanied  by  a list of hardware/software configurations
       it's supported in.

       -P <dir>
              Use Linux 2.1 style  configuration  access  to  directory  <dir>
              instead of /proc/bus/pci. (Linux 2.1 or newer only)

       -H1    Use  direct hardware access via Intel configuration mechanism 1.
              (i386 and compatible only)

       -H2    Use direct hardware access via Intel configuration mechanism  2.
              Warning: This method is able to address only first 16 devices on
              any bus and it seems to be very unrealiable in many cases. (i386
              and compatible only)

       -S     Use PCI access syscalls. (Linux on Alpha and UltraSparc only)

       -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. (All systems)

       -G     Increase debug level of the library. (All systems)





       The Linux PCI Utilities are maintained by Martin Mares <>.

pciutils-2.1.10                  30 March 2002                        lspci(8)