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Installation Notes Broadcom tg3 Linux Driver

Installation Notes
Broadcom tg3 Linux Driver
Version 3.57b

Broadcom Corporation
16215 Alton Parkway,
Irvine, CA 92619-7013

Copyright (c) 2004, 2005, 2006 Broadcom Corporation
All rights reserved

Table of Contents

Installing Source RPM Package
Building Driver From TAR File
Driver Settings
Driver Defaults
Unloading and Removing Driver
Driver Messages


This file describes the tg3 Linux driver for the Broadcom NetXtreme
10/100/1000 Mbps PCI/PCI-X/PCI Express Ethernet Network Controllers.
The latest driver is in the latest 2.6 Linux kernel. It can also be
downloaded from http://www.broadcom.com as a source package, but is
generally not necessary to do so if you are using the latest 2.6
upstream kernel from http://www.kernel.org or one of the latest
vendor kernels from Red Hat, SuSE, or others.

The tg3 driver from the Broadcom package is almost identical to the
tg3 driver in the latest 2.6 upstream Linux kernel. It includes some
additional kernel compatible code to allow it to compile on older 2.6
and some 2.4 kernels. The version number is also similar but generally
has a one letter suffix at the end, (e.g. 3.55b) to distinguish it from
the in-kernel tg3 driver.

The next few sections on packaging, compiling, and installation apply
mostly to the Broadcom driver package only.


The current version of the driver has been tested on 2.4.x kernels starting
from 2.4.24 and all 2.6.x kernels. The driver may not compile on kernels
older than 2.4.24. Testing is concentrated on i386 and x86_64 architectures.
Only limited testing has been done on some other architectures such as
powerpc and sparc64.

Minor changes to some source files and Makefile may be needed on some


To replace an older previously installed or in-kernel tg3 driver, follow
the instructions below.

The driver package from http://www.broadcom.com is released in two packaging
formats: source RPM and compressed tar formats. The file names for the two
packages are tg3-<version>.src.rpm and tg3-<version>.tar.gz respectively.
Identical source files to build the driver are included in both packages.

Installing Source RPM Package

The following are general guidelines for installing the driver.

1. Install the source RPM package:

rpm -ivh tg3-<version>.src.rpm

2. CD to the RPM path and build the binary driver for your kernel:

cd /usr/src/{redhat,OpenLinux,turbo,packages,rpm ..}

rpm -bb SPECS/tg3.spec


rpmbuild -bb SPECS/tg3.spec (for RPM version 4.x.x)

Note that the RPM path is different for different Linux distributions.

3. Install the newly built package (driver and man page):

rpm -ivh RPMS/<arch>/tg3-<version>.<arch>.rpm

<arch> is the architecture of the machine, e.g. i386:

rpm -ivh RPMS/i386/tg3-<version>.i386.rpm

Note that the –force option may be needed on some Linux distributions
if conflicts are reported.

The driver will be installed in the following path:

2.4.x kernels:


2.6.x kernels:


4. Load the driver:

insmod tg3.o
insmod tg3.ko (on 2.6.x kernels)
modprobe tg3

5. To configure network protocol and address, refer to various Linux

Building Driver From TAR File

The following are general guidelines for installing the driver.

1. Create a directory and extract the files:

tar xvzf tg3-<version>.tar.gz

2. Build the driver tg3.o (or tg3.ko) as a loadable module for the
running kernel:

cd src

3. Test the driver by loading it:

insmod tg3.o
insmod tg3.ko (on 2.6.x kernels)
insmod tg3

4. Install the driver:

make install

See RPM instructions above for the location of the installed driver.

5. To configure network protocol and address, refer to various Linux

Driver Settings

This and the rest of the sections below apply to both the in-kernel tg3
driver and the tg3 driver package from Broadcom.

Driver settings can be queried and changed using ethtool. The latest ethtool
can be downloaded from http://sourceforge.net/projects/gkernel if it is not
already installed. The following are some common examples on how to use
ethtool. See the ethtool man page for more information. ethtool settings do
not persist across reboot or module reload. The ethtool commands can be put
in a startup script such as /etc/rc.local to preserve the settings across a

1. Show current speed, duplex, and link status:

ethtool eth0

2. Change speed, duplex, autoneg:

Example: 100Mbps half duplex, no autonegotiation:

ethtool -s eth0 speed 100 duplex half autoneg off

Example: Autonegotiation with full advertisement:

ethtool -s eth0 autoneg on

Example: Autonegotiation with 100Mbps full duplex advertisement only:

ethtool -s eth0 speed 100 duplex full autoneg on

3. Show flow control settings:

ethtool -a eth0

4. Change flow control settings:

Example: Turn off flow control

ethtool -A eth0 autoneg off rx off tx off

Example: Turn flow control autonegotiation on with tx and rx advertisement:

ethtool -A eth0 autoneg on rx on tx on

Note that this is only valid if speed is set to autonegotiation.

5. Show offload settings:

ethtool -k eth0

6. Change offload settings:

Example: Turn off TSO (TCP segmentation offload)

ethtool -K eth0 tso off

7. Get statistics:

ethtool -S eth0

8. Perform self-test:

ethtool -t eth0

Note that the interface (eth0) must be up to do all tests.

9. See ethtool man page for more options.

Driver Defaults

Speed :                    Autonegotiation with all speeds advertised

Flow control :             Autonegotiation with rx and tx advertised

MTU :                      1500 (range 46 – 9000)

Some chips do not support jumbo MTUs bigger than

Rx Ring Size :              200 (range 0 – 511)

Some chips are fixed at 64

Rx Jumbo Ring Size :        100 (range 0 – 255)

Not all chips support the jumbo ring, and some
chips that support jumbo frames do not use the
jumbo ring.

Tx Ring Size :              511 (range (MAX_SKB_FRAGS+1) – 511)

MAX_SKB_FRAGS varies on different kernels and
different architectures. On a 2.6 kernel for
x86, MAX_SKB_FRAGS is 18.

Coalesce rx usecs :          20 (range 0 – 1023)

Coalesce rx usecs irq :      20 (range 0 – 255)

Coalesce rx frames :          5 (range 0 – 1023)

Coalesce rx frames irq :      5 (range 0 – 255)

Coalesce tx usecs :          72 (range 0 – 1023)

Coalesce tx usecs irq :      20 (range 0 – 255)

Coalesce tx frames :         53 (range 0 – 1023)

Coalesce tx frames irq :     5 (range 0 – 255)

Coalesce stats usecs   : 1000000 (aprox. 1 sec.)

Some coalescing parameters are not used or have
different defaults on some chips

MSI :                      Enabled (if supported by the chip and passed
the interrupt test)

TSO :                      Enabled on newer chips that support TCP segmentation
offload in hardware.

Unloading and Removing Driver

To unload the driver, use ifconfig to bring down all eth# interfaces opened
by the driver, then do the following:

rmmod tg3

Note that on 2.6 kernels, it is not necessary to bring down the eth#
interfaces before unloading the driver module.

If the driver was installed using rpm, do the following to remove it:

rpm -e tg3

If the driver was installed using make install from the tar file, the driver
tg3.o (or tg3.ko) has to be manually deleted from the system. Refer
to the section “Installing Source RPM Package” for the location of the
installed driver.

Driver Messages

The following are the most common sample messages that may be logged in the file
/var/log/messages. Use dmesg -n <level> to control the level at which messages
will appear on the console. Most systems are set to level 6 by default. To see
all messages, set the level higher.

Driver signon:

tg3.c:v3.53c (Mar 13, 2006)

NIC detected:

eth0: Tigon3 [partno(BCM95704CA40) rev 2002 PHY(5704)] (PCI:66MHz:64-bit) 10/100/1000BaseT Ethernet 00:10:18:04:3e:64
eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] Split[0] WireSpeed[1] TSOcap[1]
eth0: dma_rwctrl[763f0000] dma_mask[64-bit]

Link up and speed indication:

tg3: eth0: Link is up at 1000 Mbps, full duplex.
tg3: eth0: Flow control is on for TX and on for RX.

Link down indication:

tg3: eth0: Link is down.