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.conf(5):

           if_cxgb_load="YES"

DESCRIPTION

     The cxgb 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 http://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 FreeBSD.

     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 cxgb 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.conf(5).

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:
     http://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
     ⟨support@chelsio.com⟩.

SEE ALSO

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

HISTORY

     The cxgb device driver first appeared in FreeBSD 6.3 and FreeBSD 7.0.

AUTHORS

     The cxgb driver was written by Kip Macy <kmacy@FreeBSD.org> with substantial support from
     Scott Long <scottl@FreeBSD.org>.