1.\" Copyright (c) 2007-2008, Chelsio Inc 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions are met: 6.\" 7.\" 1. Redistributions of source code must retain the above copyright notice, 8.\" this list of conditions and the following disclaimer. 9.\" 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" 3. Neither the name of the Chelsio Inc nor the names of its 15.\" contributors may be used to endorse or promote products derived from 16.\" this software without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19.\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.\" * Other names and brands may be claimed as the property of others. 31.\" 32.\" $FreeBSD$ 33.\" 34.Dd March 14, 2007 35.Dt CXGB 4 36.Os 37.Sh NAME 38.Nm cxgb 39.Nd "Chelsio T3 10 Gigabit Ethernet adapter driver" 40.Sh SYNOPSIS 41To compile this driver into the kernel, 42place the following lines in your 43kernel configuration file: 44.Bd -ragged -offset indent 45.Cd "device firmware" 46.Cd "device cxgb" 47.Ed 48.Pp 49To load the driver as a 50module at boot time, place the following line in 51.Xr loader.conf 5 : 52.Bd -literal -offset indent 53if_cxgb_load="YES" 54.Ed 55.Sh DESCRIPTION 56The 57.Nm 58driver supports Transmit/Receive checksum offload, 59Jumbo Frames, TCP segmentation offload (TSO), Large Receive Offload (LRO), 60VLAN hardware insertion / extraction, and VLAN checksum offload. 61For further hardware information, see 62.Pa http://www.chelsio.com/ . 63.Pp 64For questions related to hardware requirements, 65refer to the documentation supplied with your Chelsio T3 adapter. 66All hardware requirements listed apply to use with 67.Fx . 68.Pp 69Support for Jumbo Frames is provided via the interface MTU setting. 70Selecting an MTU larger than 1500 bytes with the 71.Xr ifconfig 8 72utility configures the adapter to receive and transmit Jumbo Frames. 73The maximum MTU size for Jumbo Frames is 9000. 74.Pp 75For more information on configuring this device, see 76.Xr ifconfig 8 . 77.Sh HARDWARE 78The 79.Nm 80driver supports 10 Gigabit and 1 Gigabit Ethernet adapters based on the T3 and T3B chipset: 81.Pp 82.Bl -bullet -compact 83.It 84Chelsio 10GBase-CX4 85.It 86Chelsio 10GBase-LR 87.It 88Chelsio 10GBase-SR 89.El 90.Sh LOADER TUNABLES 91Tunables can be set at the 92.Xr loader 8 93prompt before booting the kernel or stored in 94.Xr loader.conf 5 . 95.Sh DIAGNOSTICS 96.Bl -diag 97.It "cxgb%d: Unable to allocate bus resource: memory" 98A fatal initialization error has occurred. 99.It "cxgb%d: Unable to allocate bus resource: interrupt" 100A fatal initialization error has occurred. 101.It "cxgb%d: Could not find firmware image %s" 102The appropriate firmware kld module was not installed. 103This is a fatal initialization error. 104.El 105.Sh SUPPORT 106For general information and support, 107go to the Chelsio support website at: 108.Pa http://www.chelsio.com/ . 109.Pp 110If an issue is identified with the released source code on the supported kernel 111with a supported adapter, email the specific information related to the 112issue to 113.Aq Mt support@chelsio.com . 114.Sh SEE ALSO 115.Xr altq 4 , 116.Xr arp 4 , 117.Xr netintro 4 , 118.Xr ng_ether 4 , 119.Xr ifconfig 8 120.Sh HISTORY 121The 122.Nm 123device driver first appeared in 124.Fx 6.3 125and 126.Fx 7.0 . 127.Sh AUTHORS 128.An -nosplit 129The 130.Nm 131driver was written by 132.An Kip Macy Aq Mt kmacy@FreeBSD.org 133with substantial support from 134.An Scott Long Aq Mt scottl@FreeBSD.org . 135