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.
49 version. This option should be used standalone.
54 Before each sequence of operations you need to select which devices you wish that
57 .B -s [[<bus>]:][<slot>][.[<func>]]
58 Select devices in specified bus, slot and function. Each component of the device
59 address can be omitted or set as "*" meaning "any value". All numbers are
60 hexadecimal. E.g., "0:" means all devices on bus 0, "0" means all functions of device 0
61 on any bus, "0.3" selects third function of device 0 on all busses and ".4" selects only
62 fourth function of each device.
64 .B -d [<vendor>]:[<device>]
65 Select devices with specified vendor and device ID. Both ID's are given in
66 hexadecimal and may be omitted or given as "*" meaning "any value".
70 To query value of a configuration register, just name it (either by typing its name or
71 by typing register address with optional
76 suffix specifying register width as byte, word or longword).
78 To set a register, write
82 is the same you would use to query the register and
84 is a comma-separated list of values you want to write starting with the given
90 knows the following configuration register names. See PCI bus specs for their precise
92 .B /usr/include/linux/pci.h
157 CB_SUBSYSTEM_VENDOR_ID
162 The PCI utilities use PCILIB (a portable library providing platform-independent
163 functions for PCI configuration space access) to talk to the PCI cards. The following
164 options control parameters of the library, especially what access method it uses.
165 By default, PCILIB uses the first available access method and displays no debugging
166 messages. Each switch is accompanied by a list of hardware/software configurations
171 Use Linux 2.1 style configuration access to directory
173 instead of /proc/bus/pci. (Linux 2.1 or newer only)
176 Use direct hardware access via Intel configuration mechanism 1. (i386 and compatible only)
179 Use direct hardware access via Intel configuration mechanism 2. Warning: This method
180 is able to address only first 16 devices on any bus and it seems to be very
181 unrealiable in many cases. (i386 and compatible only)
184 Use PCI access syscalls. (Linux on Alpha and UltraSparc only)
187 Extract all information from given file containing output of lspci -x. This is very
188 useful for analysis of user-supplied bug reports, because you can display the
189 hardware configuration in any way you want without disturbing the user with
190 requests for more dumps. (All systems)
193 Increase debug level of the library. (All systems)
197 `setpci -d *:* latency_timer=40' sets the latency timer to 64 (40 hexadecimal).
199 `setpci -s 0 device_id vendor_id' lists ID's of devices in slot 0 in all busses.
201 `setpci -s 12:3.4 3c.l=1,2,3' writes longword 1 to register 3c, 2 to register 3d
202 and 3 to register 3e of device at bus 12, slot 3, function 4.
208 The Linux PCI Utilities are maintained by Martin Mares <mj@suse.cz>.