cxgb — Chelsio T3 10 Gigabit Ethernet adapter driver
Contents
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).
Diagnostics
cxgb%d:Unabletoallocatebusresource:memory A fatal initialization error has occurred.
cxgb%d:Unabletoallocatebusresource:interrupt A fatal initialization error has occurred.
cxgb%d:Couldnotfindfirmwareimage%s The appropriate firmware kld module was not installed. This is
a fatal initialization error.
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
History
The cxgb device driver first appeared in FreeBSD 6.3 and FreeBSD 7.0.
Loader Tunables
Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5).
Name
cxgb — Chelsio T3 10 Gigabit Ethernet adapter driver
See Also
altq(4), arp(4), netintro(4), ng_ether(4), ifconfig(8)
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⟩.
Synopsis
To compile this driver into the kernel, place the following lines in your kernel configuration file:
devicefirmwaredevicecxgb
To load the driver as a module at boot time, place the following line in loader.conf(5):
if_cxgb_load="YES"
