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setpci

NAME

setpci - configure PCI devices

SYNOPSIS

setpci [options] devices operations...

DESCRIPTION

setpci is a utility for querying and configuring PCI devices.

All numbers are entered in hexadecimal notation.

Root privileges are necessary for almost all operations, excluding reads of the standard header of the configuration space on some operating systems. Please see lspci(8) for details on access rights.

OPTIONS

-v

Tells setpci to be verbose and display detailed information about configuration space accesses.

-f

Tells setpci not to complain when there's nothing to do (when no devices are selected). This option is intended for use in widely-distributed configuration scripts where it's uncertain whether the device in question is present in the machine or not.

-D

`Demo mode' -- don't write anything to the configuration registers. It's useful to try setpci -vD to see what your complex sequence of setpci operations does before you actually execute it.

--version

Shows setpci version. This option should be used stand-alone.

DEVICE SELECTION

Before each sequence of operations you need to select which devices you wish that operation to affect.

-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>]

Select 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".

OPERATIONS

To query value of a configuration register, just name it (either by typing its name or by typing register address with optional .B, .W or .L suffix specifying register width as byte, word or longword).

To set a register, write reg=values where reg is the same as you would use to query the register and values is a comma-separated list of values you want to write starting with the given address. Each value to be written can be specified either as a hexadecimal number or as a bits:mask pair which causes the bits corresponding to binary ones in the mask to be changed to values of the corresponding bits in the bits

REGISTER NAMES

setpci knows the following configuration register names. See PCI bus specifications for their precise meaning or consult header.h or /usr/include/linux/pci.h for a couple of comments.

VENDOR_ID

DEVICE_ID

COMMAND

STATUS

REVISION

CLASS_PROG

CLASS_DEVICE

CACHE_LINE_SIZE

LATENCY_TIMER

HEADER_TYPE

BIST

BASE_ADDRESS_0

BASE_ADDRESS_1

BASE_ADDRESS_2

BASE_ADDRESS_3

BASE_ADDRESS_4

BASE_ADDRESS_5

CARDBUS_CIS

SUBSYSTEM_VENDOR_ID

SUBSYSTEM_ID

ROM_ADDRESS

INTERRUPT_LINE

INTERRUPT_PIN

MIN_GNT

MAX_LAT

PRIMARY_BUS

SECONDARY_BUS

SUBORDINATE_BUS

SEC_LATENCY_TIMER

IO_BASE

IO_LIMIT

SEC_STATUS

MEMORY_BASE

MEMORY_LIMIT

PREF_MEMORY_BASE

PREF_MEMORY_LIMIT

PREF_BASE_UPPER32

PREF_LIMIT_UPPER32

IO_BASE_UPPER16

IO_LIMIT_UPPER16

BRIDGE_ROM_ADDRESS

BRIDGE_CONTROL

CB_CARDBUS_BASE

CB_CAPABILITIES

CB_SEC_STATUS

CB_BUS_NUMBER

CB_CARDBUS_NUMBER

CB_SUBORDINATE_BUS

CB_CARDBUS_LATENCY

CB_MEMORY_BASE_0

CB_MEMORY_LIMIT_0

CB_MEMORY_BASE_1

CB_MEMORY_LIMIT_1

CB_IO_BASE_0

CB_IO_BASE_0_HI

CB_IO_LIMIT_0

CB_IO_LIMIT_0_HI

CB_IO_BASE_1

CB_IO_BASE_1_HI

CB_IO_LIMIT_1

CB_IO_LIMIT_1_HI

CB_SUBSYSTEM_VENDOR_ID

CB_SUBSYSTEM_ID

CB_LEGACY_MODE_BASE

 

PCILIB OPTIONS

The PCI utilities use PCILIB (a portable library providing platform-independent functions for PCI configuration space access) to talk to the PCI cards. Please see lspci(8) for a list of switches controlling behavior of the library.

EXAMPLES

`setpci -d *:* latency_timer=40' sets the latency timer to 64 (40 hexadecimal).

`setpci -s 0 device_id vendor_id' lists ID's of devices in slot 0 in all buses.

`setpci -s 12:3.4 3c.l=1,2,3' writes longword 1 to register 3c, 2 to register 3d and 3 to register 3e of device at bus 12, slot 3, function 4.

`setpci -s 13:8.4 40.b=50:d0,04:0c,ff' works on bus 13, device 8, function 4: turns bit 7 off and bits 6 and 4 on in the byte register 40; turns bit 3 off and bit 2 on in the byte register 41; sets byte register 42 to ff.

SEE ALSO

lspci(8)

AUTHOR

The PCI Utilities are maintained by Martin Mares <mj@ucw.cz>.