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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.
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.
- -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.
- -nn
- Show PCI vendor and device codes as both numbers and names.
- -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.
- -k
- Show kernel drivers handling each device and also kernel modules
capable of handling it. Turned on by default when -v is given
in the normal mode of output. (Currently works only on Linux
with kernel 2.6 or newer.)
- -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.
- -p <file>
-
Use <file> as the map of PCI ID’s handled by kernel modules. By
default, lspci uses /lib/modules/kernel_version/modules.pcimap.
Applies only to Linux systems with recent enough module tools.
- -m
- Dump PCI device data in a backward-compatible machine readable
form. See below for details.
- -mm
- Dump PCI device data in a machine readable form for easy parsing
by scripts. See below for details.
- -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.
The PCI utilities use PCILIB (a portable library providing platformindependent
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, PCI domains 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 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.
obsd_device
The /dev/pci device on OpenBSD. Requires root privileges.
nbsd_libpci
The /dev/pci0 device on NetBSD accessed using the local libpci
library.
aix_device
Access method used on AIX. Requires root privileges.
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.
If you intend to process the output of lspci automatically, please use
one of the machine-readable output formats (-m, -vm, -vmm) described in
this section. All other formats are likely to change between versions
of lspci.
All numbers are always printed in hexadecimal. If you want to process
numeric ID’s instead of names, please add the -n switch.
Simple format (-m)
In the simple format, each device is described on a single line, which
is formatted as parameters suitable for passing to a shell script,
i.e., values separated by whitespaces, quoted and escaped if necessary.
Some of the arguments are positional: slot, class, vendor name, device
name, subsystem vendor name and subsystem name (the last two are empty
if the device has no subsystem); the remaining arguments are optionlike:
- -rrev
- Revision number.
- -pprogif
-
Programming interface.
The relative order of positional arguments and options is undefined.
New options can be added in future versions, but they will always have
a single argument not separated from the option by any spaces, so they
can be easily ignored if not recognized.
Verbose format (-vmm)
The verbose output is a sequence of records separated by blank lines.
Each record describes a single device by a sequence of lines, each line
containing a single ‘tag: value’ pair. The tag and the value are separated
by a single tab character. Neither the records nor the lines
within a record are in any particular order. Tags are case-sensitive.
The following tags are defined:
Slot The name of the slot where the device resides
([domain:]bus:device.function). This tag is always the first in
a record.
Class Name of the class.
Vendor Name of the vendor.
Device Name of the device.
SVendor
Name of the subsystem vendor (optional).
SDevice
Name of the subsystem (optional).
- Rev
- Revision number (optional).
ProgIf Programming interface (optional).
Driver Kernel driver currently handling the device (optional, Linux
only).
Module Kernel module reporting that it is capable of handling the
device (optional, Linux only).
New tags can be added in future versions, so you should silently ignore
any tags you don’t recognize.
Backward-compatible verbose format (-vm)
In this mode, lspci tries to be perfectly compatible with its old versions.
It’s almost the same as the regular verbose format, but the
Device tag is used for both the slot and the device name, so it occurs
twice in a single record. Please avoid using this format in any new
code.
/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.gz
If lspci is compiled with support for compression, this file is
tried before pci.ids.
/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.
Sometimes, lspci is not able to decode the configuration registers completely.
This usually happens when not enough documentation was available
to the authors. In such cases, it at least prints the <?> mark to
signal that there is potentially something more to say. If you know the
details, patches will be of course welcome.
Access to the extended configuration space is currently supported only
by the linux_sysfs back-end.
setpci(8)
, update-pciids(8)
The PCI Utilities are maintained by Martin Mares <mj@ucw.cz>.
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