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.Dd March 14, 2007 33.Dt CXGB 4 34.Os 35.Sh NAME 36.Nm cxgb 37.Nd "Chelsio T3 10 Gigabit Ethernet adapter driver" 38.Sh SYNOPSIS 39To compile this driver into the kernel, 40place the following lines in your 41kernel configuration file: 42.Bd -ragged -offset indent 43.Cd "device firmware" 44.Cd "device cxgb" 45.Ed 46.Pp 47To load the driver as a 48module at boot time, place the following line in 49.Xr loader.conf 5 : 50.Bd -literal -offset indent 51if_cxgb_load="YES" 52.Ed 53.Sh DESCRIPTION 54The 55.Nm 56driver supports Transmit/Receive checksum offload, 57Jumbo Frames, TCP segmentation offload (TSO), Large Receive Offload (LRO), 58VLAN hardware insertion / extraction, and VLAN checksum offload. 59For further hardware information, see 60.Pa http://www.chelsio.com/ . 61.Pp 62For questions related to hardware requirements, 63refer to the documentation supplied with your Chelsio T3 adapter. 64All hardware requirements listed apply to use with 65.Fx . 66.Pp 67Support for Jumbo Frames is provided via the interface MTU setting. 68Selecting an MTU larger than 1500 bytes with the 69.Xr ifconfig 8 70utility configures the adapter to receive and transmit Jumbo Frames. 71The maximum MTU size for Jumbo Frames is 9000. 72.Pp 73For more information on configuring this device, see 74.Xr ifconfig 8 . 75.Sh HARDWARE 76The 77.Nm 78driver supports 10 Gigabit and 1 Gigabit Ethernet adapters based on the T3 and T3B chipset: 79.Pp 80.Bl -bullet -compact 81.It 82Chelsio 10GBase-CX4 83.It 84Chelsio 10GBase-LR 85.It 86Chelsio 10GBase-SR 87.El 88.Sh LOADER TUNABLES 89Tunables can be set at the 90.Xr loader 8 91prompt before booting the kernel or stored in 92.Xr loader.conf 5 . 93.Sh DIAGNOSTICS 94.Bl -diag 95.It "cxgb%d: Unable to allocate bus resource: memory" 96A fatal initialization error has occurred. 97.It "cxgb%d: Unable to allocate bus resource: interrupt" 98A fatal initialization error has occurred. 99.It "cxgb%d: Could not find firmware image %s" 100The appropriate firmware kld module was not installed. 101This is a fatal initialization error. 102.El 103.Sh SUPPORT 104For general information and support, 105go to the Chelsio support website at: 106.Pa http://www.chelsio.com/ . 107.Pp 108If an issue is identified with the released source code on the supported kernel 109with a supported adapter, email the specific information related to the 110issue to 111.Aq Mt support@chelsio.com . 112.Sh SEE ALSO 113.Xr altq 4 , 114.Xr arp 4 , 115.Xr netintro 4 , 116.Xr ng_ether 4 , 117.Xr ifconfig 8 118.Sh HISTORY 119The 120.Nm 121device driver first appeared in 122.Fx 6.3 123and 124.Fx 7.0 . 125.Sh AUTHORS 126.An -nosplit 127The 128.Nm 129driver was written by 130.An Kip Macy Aq Mt kmacy@FreeBSD.org 131with substantial support from 132.An Scott Long Aq Mt scottl@FreeBSD.org . 133