1.\" Copyright (c) 2015 Mellanox Technologies 2.\" Copyright (c) 2021 NVIDIA corporation & affiliates 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 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.\" THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd July 20, 2021 29.Dt MLX5EN 4 30.Os 31.Sh NAME 32.Nm mlx5en 33.Nd "NVIDIA Mellanox ConnectX-4/5/6 [Dx/Ex/Lx] based 200Gb, 100Gb, 50Gb, 40Gb, 25Gb and 10Gb ethernet adapter driver" 34.Sh SYNOPSIS 35To compile this driver into the kernel, 36place the following lines in your 37kernel configuration file: 38.Bd -ragged -offset indent 39.Cd "options COMPAT_LINUXKPI" 40.Cd "options RATELIMIT" 41.Cd "options KERN_TLS" 42.Cd "device xz" 43.Cd "device mlxfw" 44.Cd "device firmware" 45.Cd "device mlx5" 46.Cd "device mlx5en" 47.Ed 48.Pp 49To load the driver as a module at run-time, 50run the following command as root: 51.Bd -literal -offset indent 52kldload mlx5en 53.Ed 54.Pp 55To load the driver as a 56module at boot time, place the following lines in 57.Xr loader.conf 5 : 58.Bd -literal -offset indent 59mlx5en_load="YES" 60.Ed 61.Sh DESCRIPTION 62The 63.Nm 64driver provides support for PCI Express Ethernet adapters based on 65ConnectX-4/5/6 [Dx, Ex and Lx variants]. 66The driver supports Jumbo Frames, Transmit and Receive checksum offload, 67TCP segmentation offload (TSO), Large Receive Offload (LRO), 68HW Large Receive Offload (HW LRO), VLAN tag insertion and extraction, 69VLAN checksum offload, VLAN TSO, hardware rate limiting (TXRTLMT), 70stateless VxLAN hardware offload for receive and transmit, 71HW TLS offload for transmit, Receive Side Steering (RSS) and 72.Xr NUMA 4 73awareness. 74.Pp 75The network interface name is 76.Dv mce<N> 77which corresponds to a PCI function, 78.Dv mlx_core<N> , 79where 80.Dv <N> 81is a number starting at zero. 82There is at most one network interface per PCI function. 83.Pp 84For further information and questions related to hardware 85requirements, see 86.Pa https://www.mellanox.com . 87.Sh HARDWARE 88The 89.Nm 90driver supports 200Gb, 100Gb, 50Gb, 40Gb, 25Gb and 10Gb ethernet adapters. 91.Pp 92.Bl -bullet -compact 93.It 94ConnectX-6 supports 10/20/25/40/50/56/100Gb/200Gb/s speeds. 95.It 96ConnectX-5 supports 10/20/25/40/50/56/100Gb/s speeds. 97.It 98ConnectX-4 supports 10/20/25/40/50/56/100Gb/s speeds. 99.It 100ConnectX-4 LX supports 10/25/40/50Gb/s speeds and reduced power consumption. 101.El 102.Sh CONFIGURATION 103The 104.Nm 105network interface is configured using 106.Xr ifconfig 8 107and the 108.Xr sysctl 8 109tree at 110.Dv dev.mce.<N> . 111All configurable entries are also tunables, and can be put directly into the 112.Xr loader.conf 5 113for persistent configuration. 114.Sh SUPPORT 115For general information and support, 116go to the NVIDIA Mellanox networking support website at: 117.Pa https://www.mellanox.com . 118.Pp 119If an issue is identified with this driver using a supported adapter, 120e-mail all the specific information related to the issue to 121.Aq Mt nbu-freebsd-drivers@nvidia.com . 122.Sh SEE ALSO 123.Xr ifconfig 8 124.Sh HISTORY 125The 126.Nm 127device driver first appeared in 128.Fx 11.0 . 129.Sh AUTHORS 130.An -nosplit 131The 132.Nm 133driver was written by 134.An NVIDIA Mellanox networking <nbu-freebsd-drivers@nvidia.com> . 135