Web | This Site

Unix for Beginners
Unix Shell Programming
Advanced Unix
Unix Useful References
Unix Useful Resources
Selected Reading
© 2011 TutorialsPoint.COM

| Home |  | References |  | Discussion Forums |  | About TP

# setpci - Unix, Linux Command

# 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

Tag | Description
--- | ---
-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.

Tag | Description
--- | ---
-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>.

Advertisement

Online Image Processing

Indian Baby Names