1 This package contains the PCI Utilities, version @VERSION@.
3 Copyright (c) 1997--2004 Martin Mares <mj@ucw.cz>
5 All files in this package can be freely distributed and used according
6 to the terms of the GNU General Public License, either version 2 or
7 (at your opinion) any newer version. See http://www.gnu.org/ for details.
10 ############################################################################
12 Beware, this is a preliminary test version! Anything might not work!
14 Some more things I intend to merge before the 2.2.0 release:
16 o pcimodules and possibly other Linux module related stuff
17 o New ID's from the pciids project
18 o Avoid calling show_ext_caps() for non-ext devices.
20 ############################################################################
26 The PCI Utilities package contains a library for portable access to PCI bus
27 configuration registers and several utilities based on this library.
29 Currently, pciutils work on all versions of Linux and they also have somewhat
30 experimental support for FreeBSD, NetBSD, AIX, GNU Hurd and Solaris/x86.
31 It should be very easy to add support for other systems as well (volunteers
32 wanted; if you want to try that, I'll be very glad to see the patches and
33 include them in the next version).
35 The utilities include: (See manual pages for more details)
37 - lspci: displays detailed information about all PCI busses and devices.
39 - setpci: allows to read from and write to PCI device configuration
40 registers. For example, you can adjust the latency timers with it.
41 CAUTION: There is a couple of dangerous points and caveats, please read
42 the manual page first!
44 - update-pciids: download the current version of the pci.ids file.
47 2. Compiling and (un)installing
48 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
49 Just run "make" to compile the package and then "make install" to install it.
51 If you want to change the default installation location, please override
52 the ROOT and PREFIX variables specified in the Makefile -- e.g., you can
53 use "make PREFIX=/opt/pciutils ROOT=/opt/pciutils install" to create
54 a separate installation not interfering with the rest of your system.
56 When you are bored of dumping PCI registers, just use "make uninstall".
61 The database of PCI ID's (the pci.ids file) gets out of date much faster
62 than I release new versions of this package.
64 If you are missing names for any of your devices or you just want to stay
65 on the bleeding edge, download the most recent pci.ids file from
66 http://pciids.sf.net/ (e.g., by running the update-ids utility).
68 If your devices still appear as unknown, please send us their ID's and
69 names, the detailed instructions for submissions are listed on the
73 4. Available access methods
74 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
75 The library (and therefore all the utilities) know a variety of methods for
76 accessing the PCI registers. Here is a list of them, sorted by autodetection
79 /proc/bus/pci on all Linux systems since kernel 2.1.82.
80 /sys/bus/pci on all Linux systems since kernel 2.5.xx.
81 direct port access on i386 systems running Linux, GNU Hurd or Solaris/x86;
82 available only to root, useful if no other access
83 method is available or you want to hunt kernel bugs
84 /dev/pci used on FreeBSD
85 lsdev + odmget used on AIX
87 dumps reading of dumps produced by `lspci -x'
88 (this one is not autodetected)
93 There is still no documentation for the library, if you want to use it
94 in your programs, please follow the comments in lib/pci.h and in the
95 example program lib/example.c.
100 If you have any bug reports or suggestions, send them to the author.
102 If you have any new ID's, I'll be very glad to add them to the database, but
103 please take a look at http://pciids.sf.net/ first and follow the instructions.
105 If you want, subscribe to linux-pci@atrey.karlin.mff.cuni.cz (send
106 "subscribe linux-pci" to majordomo@atrey.karlin.mff.cuni.cz).
107 Release notes about new versions will be send to the list and problems with
108 the Linux PCI support will be probably discussed there, too.
113 You also might want to look at the pciutils web page containing release
114 notes and other news: http://atrey.karlin.mff.cuni.cz/~mj/pciutils.shtml .
116 There also exists a utility called PowerTweak which is able to fine tune
117 parameters of many chipsets much better than the Bridge Optimization code
118 in Linux kernel (already removed in 2.3.x). See http://powertweak.sf.net/
119 for more information.