1.\" Copyright (c) 2007, 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 as well as TCP segmentation offload (TSO). 60For further hardware information, see 61.Pa http://www.chelsio.com/ . 62.Pp 63For questions related to hardware requirements, 64refer to the documentation supplied with your Chelsio T3 adapter. 65All hardware requirements listed apply to use with 66.Fx . 67.Pp 68Support for Jumbo Frames is provided via the interface MTU setting. 69Selecting an MTU larger than 1500 bytes with the 70.Xr ifconfig 8 71utility configures the adapter to receive and transmit Jumbo Frames. 72The maximum MTU size for Jumbo Frames is 9000. 73.Pp 74For more information on configuring this device, see 75.Xr ifconfig 8 . 76.Sh HARDWARE 77The 78.Nm 79driver supports 10 Gigabit Ethernet adapters based on the T3 and T3B chipset: 80.Pp 81.Bl -bullet -compact 82.It 83Chelsio 10GBase-CX4 84.It 85Chelsio 10GBase-LR 86.It 87Chelsio 10GBase-SR 88.El 89.Sh LOADER TUNABLES 90Tunables can be set at the 91.Xr loader 8 92prompt before booting the kernel or stored in 93.Xr loader.conf 5 . 94.Bl -tag -width indent 95.El 96.Sh DIAGNOSTICS 97.Bl -diag 98.It "cxgb%d: Unable to allocate bus resource: memory" 99A fatal initialization error has occurred. 100.It "cxgb%d: Unable to allocate bus resource: interrupt" 101A fatal initialization error has occurred. 102.It "cxgb%d: Could not find firmware image %s" 103The appropriate firmware kld module was not installed. 104This is a fatal initialization error. 105.El 106.Sh SUPPORT 107For general information and support, 108go to the Chelsio support website at: 109.Pa http://www.chelsio.com/ . 110.Pp 111If an issue is identified with the released source code on the supported kernel 112with a supported adapter, email the specific information related to the 113issue to 114.Aq help@chelsio.com . 115.Sh SEE ALSO 116.Xr altq 4 , 117.Xr arp 4 , 118.Xr netintro 4 , 119.Xr ng_ether 4 , 120.Xr ifconfig 8 121.Sh HISTORY 122The 123.Nm 124device driver first appeared in 125.Fx 6.3 126and 127.Fx 7.0 . 128.Sh AUTHORS 129.An -nosplit 130The 131.Nm 132driver was written by 133.An Kip Macy Aq kmacy@FreeBSD.org 134with substantial support from 135.An Scott Long Aq scottl@FreeBSD.org . 136