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 February 9, 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 63and Jumbo Frames. 64For further hardware information, see http://www.myri.com 65.Pp 66For questions related to hardware requirements, 67refer to the documentation supplied with your Myri10GE adapter. 68All hardware requirements listed apply to use with 69.Fx . 70.Pp 71Support for Jumbo Frames is provided via the interface MTU setting. 72Selecting an MTU larger than 1500 bytes with the 73.Xr ifconfig 8 74utility configures the adapter to receive and transmit Jumbo Frames. 75The maximum MTU size for Jumbo Frames is 9000. 76.Pp 77For more information on configuring this device, see 78.Xr ifconfig 8 . 79.Sh HARDWARE 80The 81.Nm 82driver supports 10 Gigabit Ethernet adapters based on the 83Myricom LANai Z8E chips: 84.Pp 85.Bl -bullet -compact 86.It 87Myricom 10GBase-CX4 (10G-PCIE-8A-C, 10G-PCIE-8AL-C) 88.It 89Myricom 10GBase-R (10G-PCIE-8A-R, 10G-PCIE-8AL-R) 90.It 91Myricom 10G XAUI over ribbon fiber (10G-PCIE-8A-Q, 10G-PCIE-8AL-Q) 92.El 93.Sh LOADER TUNABLES 94Tunables can be set at the 95.Xr loader 8 96prompt before booting the kernel or stored in 97.Xr loader.conf 5 . 98.Bl -tag -width indent 99.It Va hw.mxge.flow_control_enabled 100Whether or not hardware flow control is enabled on the adapter. 101The default value is 1. 102.It Va hw.mxge.intr_coal_delay 103This value delays the generation of all interrupts in units of 1041 microsecond. 105The default value is 30. 106.It Va hw.mxge.skip_pio_read 107This value determines whether or not the driver may omit doing a 108pio read in the interrupt handler which ensures that the interrupt 109line has been deasserted when using xPIC interrupts. 110A non-zero value 111may result in lower CPU overhead, however it may also result in 112spurious interrupts. 113The default value is 0. 114.El 115.Sh DIAGNOSTICS 116.Bl -diag 117.It "mxge%d: Unable to allocate bus resource: memory" 118A fatal initialization error has occurred. 119.It "mxge%d: Unable to allocate bus resource: interrupt" 120A fatal initialization error has occurred. 121.It "mxge%d: Could not find firmware image %s" 122The appropriate firmware kld module was not installed. 123This is a fatal initialization error. 124.El 125.Sh SUPPORT 126For general information and support, 127go to the Myricom support website at: 128.Pa http://www.myri.com/scs . 129.Pp 130If an issue is identified with the released source code on the supported kernel 131with a supported adapter, email the specific information related to the 132issue to 133.Aq help@myri.com . 134.Sh SEE ALSO 135.Xr arp 4 , 136.Xr netintro 4 , 137.Xr ng_ether 4 , 138.Xr ifconfig 8 139.Sh HISTORY 140The 141.Nm 142device driver first appeared in 143.Fx 7.0 . 144.Sh AUTHORS 145The 146.Nm 147driver was written by 148.An Andrew Gallatin Aq gallatin@FreeBSD.org . 149