How To Look Up For PCI Devices And Corresponding Modules in SL5

Weblinks

Intel Driver Download Center: http://downloadcenter.intel.com/
Intel Support Site: http://support.intel.com/support/index.htm
Intel Network Connectivity: http://support.intel.com/support/network/sb/cs-008441.htm

Procedure Description

List your PCI devices, look up for the vendor and hardware ID numbers and search the corresponding entry in the table which maps hardware IDs to module names.

This might be helpful if one has a new hardware device such as a new network card, which is not recognized by the system because of a missing entry in the file /lib/modules/<kernelversion>/modules.pcimap, which maps devices to modules. Assumption: the required driver (module) is present.

Step by Step Procedure: Example For a Working Network Card

List your PCI devices using `lscpi`:

# lspci
...
00:19.0 Ethernet controller: Intel Corporation 82566DM-2 Gigabit Network Connection (rev 02)
...

Listing with lspci -n will show identification numbers instead of names:

# lspci -n
...
00:19.0 0200: 8086:10bd (rev 02)
...

a)

19.0 PCI device number
b)

0200 Hardware Type "Ethernet controller"
c)

8086 Vendor ID "Intel Corporation"
d)

10bd Hardware ID "82566DM-2 Gigabit Network Connection"

For a very verbose output use `lspci -vv`:

# lspci -vv | grep 00:19 -A 15
00:19.0 Ethernet controller: Intel Corporation 82566DM-2 Gigabit Network Connection (rev 02)
    Subsystem: Fujitsu Siemens Computer GmbH Unknown device 10fd
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0
    Interrupt: pin A routed to IRQ 74
    Region 0: Memory at f2200000 (32-bit, non-prefetchable) [size=128K]
    Region 1: Memory at f2225000 (32-bit, non-prefetchable) [size=4K]
    Region 2: I/O ports at 1820 [size=32]
    Capabilities: [c8] Power Management version 2
        Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
        Status: D0 PME-Enable- DSel=0 DScale=1 PME-
    Capabilities: [d0] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable+
        Address: 00000000fee00000  Data: 404a
    Capabilities: [e0] #13 [0306]

Hovewer, take the device ID 10bd and look for it in the `modules.pcimap`:

# grep 10bd /lib/modules/2.6.18-92.1.13.el5/modules.pcimap
e1000e      0x00008086 0x000010bd 0xffffffff 0xffffffff 0x00000000 0x00000000 0x0

In this output one can see that the kernel module e1000e is selected for this network device. You can see this by "lsmod" if your network is up:

# lsmod | grep e1000e
e1000e         92801  0

Step by Step Procedure: Example For a Not Working Network Card

Basically the steps from the previous section are repeated to get the required hardware infos.

Eventually the missing entry is added to modules.pcimap. Here we assume that the "e1000e" module works as well for the new network card:

# lscpi
00:19.0 Ethernet controller: Intel Corporation Unknown device 10de (rev 02)

The device ID is `10de`:

# grep 10de /lib/modules/2.6.18-53.1.4.el5/modules.pcimap
...

Only vendor IDs match the number 10de. The following line will be added to `modules.pcimap`:

# vi /lib/modules/2.6.18-53.1.4.el5/modules.pcimap
... adding the line 
e1000e           0x00008086 0x000010de 0xffffffff 0xffffffff 0x00000000 0x00000000 0x0

ethtool

Use ethtool to get network device specific information, e.g. query the specified ethernet device for associated driver information:

[root@pc7377 ~]# ethtool -i eth0
driver: e1000e
version: 0.4.1.7-NAPI
firmware-version: 1.3-0
bus-info: 0000:00:19.0

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