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>.

Debian                                           March 14, 2007                                          CXGB(4)