1.\" Copyright (c) 2019 The FreeBSD Foundation. 2.\" 3.\" Redistribution and use in source and binary forms, with or without 4.\" modification, are permitted provided that the following conditions 5.\" are met: 6.\" 1. Redistributions of source code must retain the above copyright 7.\" notice, this list of conditions and the following disclaimer. 8.\" 2. Redistributions in binary form must reproduce the above copyright 9.\" notice, this list of conditions and the following disclaimer in the 10.\" documentation and/or other materials provided with the distribution. 11.\" 12.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 13.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 16.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 18.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 19.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 22.\" SUCH DAMAGE. 23.\" 24.\" $FreeBSD$ 25.\" 26.Dd September 28, 2021 27.Dt MGB 4 28.Os 29.Sh NAME 30.Nm mgb 31.Nd "Microchip LAN743x PCIe Gigabit Ethernet driver" 32.Sh SYNOPSIS 33To load the driver as a module at boot time, place the following line in 34.Xr loader.conf 5 : 35.Bd -literal -offset indent 36if_mgb_load="YES" 37.Ed 38.Sh DESCRIPTION 39The 40.Nm 41driver is experimental, and has a number of caveats and limitations. 42It is currently available only as a kernel module. 43.Pp 44The 45.Nm 46device driver provides support for PCIe Gigabit Ethernet adapters based on 47Microchip's LAN7430 and LAN7431. 48.Pp 49For more information on configuring this device, see 50.Xr ifconfig 8 . 51.Sh HARDWARE 52The 53.Nm 54driver supports: 55.Pp 56.Bl -bullet -compact 57.It 58Microchip LAN7430 PCIe Gigabit Ethernet controller with PHY 59.It 60Microchip LAN7431 PCIe Gigabit Ethernet controller with RGMII interface 61.El 62.Sh SEE ALSO 63.Xr arp 4 , 64.Xr miibus 4 , 65.Xr ifconfig 8 66.Sh CAVEATS 67The driver does not yet implement support for many hardware features, 68including: 69.Bl -bullet -compact 70.It 71Multiple RX queue support 72.It 73RX and TX checksum offload 74.It 75Hardware VLAN tagging or untagging 76.It 77Multicast receive packet filtering 78.It 79Wake on LAN (WoL) 80.It 81LSO 82.It 83RSS 84.El 85.Pp 86LAN7431 support is completely untested. 87