if_cxgb (4)

Leading comments

Copyright (c) 2007-2008, Chelsio Inc
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/o...

(The comments found at the beginning of the groff file "man4/if_cxgb.4freebsd".)

NAME

cxgb - Chelsio T3 10 Gigabit Ethernet adapter driver

SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file:

device firmware device cxgb

To load the driver as a module at boot time, place the following line in loader.conf5:

if_cxgb_load="YES"

DESCRIPTION

The ifconfig driver supports Transmit/Receive checksum offload, Jumbo Frames, TCP segmentation offload (TSO), Large Receive Offload (LRO), VLAN hardware insertion / extraction, and VLAN checksum offload. For further hardware information, see www.chelsio.com

For questions related to hardware requirements, refer to the documentation supplied with your Chelsio T3 adapter. All hardware requirements listed apply to use with Fx .

Support for Jumbo Frames is provided via the interface MTU setting. Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility configures the adapter to receive and transmit Jumbo Frames. The maximum MTU size for Jumbo Frames is 9000.

For more information on configuring this device, see ifconfig(8).

HARDWARE

The ifconfig driver supports 10 Gigabit and 1 Gigabit Ethernet adapters based on the T3 and T3B chipset:

• Chelsio 10GBase-CX4
• Chelsio 10GBase-LR
• Chelsio 10GBase-SR

LOADER TUNABLES

Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf5.

DIAGNOSTICS

"cxgb%d: Unable to allocate bus resource: memory"

A fatal initialization error has occurred.

"cxgb%d: Unable to allocate bus resource: interrupt"

A fatal initialization error has occurred.

"cxgb%d: Could not find firmware image %s"

The appropriate firmware kld module was not installed. This is a fatal initialization error.

SUPPORT

For general information and support, go to the Chelsio support website at: www.chelsio.com

If an issue is identified with the released source code on the supported kernel with a supported adapter, email the specific information related to the issue to Aq support@chelsio.com .

SEE ALSO

altq(4), arp(4), netintro(4), ng_ether4, ifconfig(8)

HISTORY

The ifconfig device driver first appeared in Fx 6.3 and Fx 7.0 .

AUTHORS

An -nosplit The ifconfig driver was written by An Kip Macy Aq kmacy@FreeBSD.org with substantial support from An Scott Long Aq scottl@FreeBSD.org .