1 .TH setpci 8 "@TODAY@" "@VERSION@" "Linux PCI Utilities"
4 setpci \- configure PCI devices
14 is a utility for querying and configuring PCI devices.
16 To make use of all the features of this program, you need to have Linux kernel
17 2.1.82 or newer which supports the /proc/bus/pci interface. With older kernels,
18 the PCI utilities have to use direct hardware access which is available
19 only to root and it suffers from numerous race conditions and other problems.
21 All numbers are entered in hexadecimal notation.
28 to be verbose and display detailed information about configuration space accesses.
33 not to complain when there's nothing to do (when no devices are selected).
34 This option is intended for use in widely-distributed configuration scripts
35 where it's uncertain whether the device in question is present in the machine
39 `Demo mode' -- simulate configuration space accesses instead of really doing them.
42 to see what your complex sequence of
44 operations does before you actually execute it.
48 Before each sequence of operations you need to select which devices you wish that
51 .B -s [[<bus>]:][<slot>][.[<func>]]
52 Select devices in specified bus, slot and function. Each component of the device
53 address can be omitted or set as "*" meaning "any value". All numbers are
54 hexadecimal. E.g., "0:" means all devices on bus 0, "0" means all functions of device 0
55 on any bus, "0.3" selects third function of device 0 on all busses and ".4" selects only
56 fourth function of each device.
58 .B -d [<vendor>]:[<device>]
59 Select devices with specified vendor and device ID. Both ID's are given in
60 hexadecimal and may be omitted or given as "*" meaning "any value".
64 To query value of a configuration register, just name it (either by typing its name or
65 by typing register address with optional
70 suffix specifying register width as byte, word or longword).
72 To set a register, write
76 is the same you would use to query the register and
78 is a comma-separated list of values you want to write starting with the given
84 knows the following configuration register names. See PCI bus specs for their precise
86 .B /usr/include/linux/pci.h
151 CB_SUBSYSTEM_VENDOR_ID
156 The PCI utilities use PCILIB (a portable library providing platform-independent
157 functions for PCI configuration space access) to talk to the PCI cards. The following
158 options control parameters of the library, especially what access method it uses.
159 By default, PCILIB uses the first available access method and displays no debugging
160 messages. Each switch is accompanied by a list of hardware/software configurations
165 Use Linux 2.1 style configuration access to directory
167 instead of /proc/bus/pci. (Linux 2.1 or newer only)
170 Use direct hardware access via Intel configuration mechanism 1. (i386 and compatible only)
173 Use direct hardware access via Intel configuration mechanism 2. Warning: This method
174 is able to address only first 16 devices on any bus and it seems to be very
175 unrealiable in many cases. (i386 and compatible only)
178 Use PCI access syscalls. (Linux on Alpha and UltraSparc only)
181 Extract all information from given file containing output of lspci -x. This is very
182 useful for analysis of user-supplied bug reports, because you can display the
183 hardware configuration in any way you want without disturbing the user with
184 requests for more dumps. (All systems)
187 Increase debug level of the library. (All systems)
191 `setpci -d *:* latency_timer=40' sets the latency timer to 64 (40 hexadecimal).
193 `setpci -s 0 device_id vendor_id' lists ID's of devices in slot 0 in all busses.
195 `setpci -s 12:3.4 34.l=1,2,3' writes longword 1 to register 34, 2 to register 35
196 and 3 to register 35 of device at bus 12, slot 3, function 4.
202 The Linux PCI Utilities are maintained by Martin Mares <mj@atrey.karlin.mff.cuni.cz>.