Chapter 2. The

proc

File System

35

2.2.25.

/proc/pci

This file contains a full listing of every PCI device on your system. Depending on the number of PCI

devices you have,

/proc/pci

can get rather long. An example from this file on a basic system looks

similar to this:

Bus

0, device

0, function

0:

Host bridge: Intel Corporation 440BX/ZX   82443BX/ZX Host bridge (rev 3).

Master Capable.

Latency=64.

Prefetchable 32 bit memory at 0xe4000000 [0xe7ffffff].

Bus

0, device

1, function

0:

PCI bridge: Intel Corporation 440BX/ZX   82443BX/ZX AGP bridge (rev 3).

Master Capable.

Latency=64.

Min Gnt=128.

Bus

0, device

4, function

0:

ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 2).

Bus

0, device

4, function

1:

IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 1).

Master Capable.

Latency=32.

I/O at 0xd800 [0xd80f].

Bus

0, device

4, function

2:

USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 1).

IRQ 5.

Master Capable.

Latency=32.

I/O at 0xd400 [0xd41f].

Bus

0, device

4, function

3:

Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 2).

IRQ 9.

Bus

0, device

9, function

0:

Ethernet controller: Lite On Communications Inc LNE100TX (rev 33).

IRQ 5.

Master Capable.

Latency=32.

I/O at 0xd000 [0xd0ff].

Non prefetchable 32 bit memory at 0xe3000000 [0xe30000ff].

Bus

0, device

12, function

0:

VGA compatible controller: S3 Inc. ViRGE/DX or /GX (rev 1).

IRQ 11.

Master Capable.

Latency=32.

Min Gnt=4.Max Lat=255.

Non prefetchable 32 bit memory at 0xdc000000 [0xdfffffff].

This output shows a list of all PCI devices, sorted in the order of bus, device, and function. Beyond

providing the name and version of the device, this list also gives you detailed IRQ information so you

can quickly look for conflicts.

Tip

To get a more readable version of this informations, type:

lspci  vb