1.\" Copyright (c) 2006, Myricom 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 Myricom 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 September 15, 2006 35.Dt MXGE 4 36.Os 37.Sh NAME 38.Nm mxge 39.Nd "Myricom Myri10GE 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 mxge" 47.Ed 48.Pp 49Alternatively, to load the driver as a 50module at boot time, place the following lines in 51.Xr loader.conf 5 : 52.Bd -literal -offset indent 53if_mxge_load="YES" 54mxge_ethp_z8e_load="YES" 55mxge_eth_z8e_load="YES" 56.Ed 57.Sh DESCRIPTION 58The 59.Nm 60driver provides support for PCI Express 10 Gigabit Ethernet adapters based on 61the Myricom LANai Z8E chip. 62The driver supports Transmit/Receive checksum offload, 63Jumbo Frames as well as TCP segmentation offload (TSO). 64For further hardware information, see 65.Pa http://www.myri.com/ . 66.Pp 67For questions related to hardware requirements, 68refer to the documentation supplied with your Myri10GE adapter. 69All hardware requirements listed apply to use with 70.Fx . 71.Pp 72Support for Jumbo Frames is provided via the interface MTU setting. 73Selecting an MTU larger than 1500 bytes with the 74.Xr ifconfig 8 75utility configures the adapter to receive and transmit Jumbo Frames. 76The maximum MTU size for Jumbo Frames is 9000. 77.Pp 78For more information on configuring this device, see 79.Xr ifconfig 8 . 80.Sh HARDWARE 81The 82.Nm 83driver supports 10 Gigabit Ethernet adapters based on the 84Myricom LANai Z8E chips: 85.Pp 86.Bl -bullet -compact 87.It 88Myricom 10GBase-CX4 (10G-PCIE-8A-C, 10G-PCIE-8AL-C) 89.It 90Myricom 10GBase-R (10G-PCIE-8A-R, 10G-PCIE-8AL-R) 91.It 92Myricom 10G XAUI over ribbon fiber (10G-PCIE-8A-Q, 10G-PCIE-8AL-Q) 93.El 94.Sh LOADER TUNABLES 95Tunables can be set at the 96.Xr loader 8 97prompt before booting the kernel or stored in 98.Xr loader.conf 5 . 99.Bl -tag -width indent 100.It Va hw.mxge.flow_control_enabled 101Whether or not hardware flow control is enabled on the adapter. 102The default value is 1. 103.It Va hw.mxge.intr_coal_delay 104This value delays the generation of all interrupts in units of 1051 microsecond. 106The default value is 30. 107.It Va hw.mxge.skip_pio_read 108This value determines whether or not the driver may omit doing a 109pio read in the interrupt handler which ensures that the interrupt 110line has been deasserted when using xPIC interrupts. 111A non-zero value 112may result in lower CPU overhead, however it may also result in 113spurious interrupts. 114The default value is 0. 115.El 116.Sh DIAGNOSTICS 117.Bl -diag 118.It "mxge%d: Unable to allocate bus resource: memory" 119A fatal initialization error has occurred. 120.It "mxge%d: Unable to allocate bus resource: interrupt" 121A fatal initialization error has occurred. 122.It "mxge%d: Could not find firmware image %s" 123The appropriate firmware kld module was not installed. 124This is a fatal initialization error. 125.El 126.Sh SUPPORT 127For general information and support, 128go to the Myricom support website at: 129.Pa http://www.myri.com/scs/ . 130.Pp 131If an issue is identified with the released source code on the supported kernel 132with a supported adapter, email the specific information related to the 133issue to 134.Aq help@myri.com . 135.Sh SEE ALSO 136.Xr altq 4 , 137.Xr arp 4 , 138.Xr netintro 4 , 139.Xr ng_ether 4 , 140.Xr ifconfig 8 141.Sh HISTORY 142The 143.Nm 144device driver first appeared in 145.Fx 6.3 . 146.Sh AUTHORS 147The 148.Nm 149driver was written by 150.An Andrew Gallatin Aq gallatin@FreeBSD.org . 151