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38535d6cab
The hardware rate limiting feature is enabled by the RATELIMIT kernel option. Please refer to ifconfig(8) and the txrtlmt option and the SO_MAX_PACING_RATE set socket option for more information. This feature is compatible with hardware transmit send offload, TSO. A set of sysctl(8) knobs under dev.mce.<N>.rate_limit are provided to setup the ratelimit table and also to fine tune various rate limit related parameters. Sponsored by: Mellanox Technologies
134 lines
3.8 KiB
Groff
134 lines
3.8 KiB
Groff
.\" Copyright (c) 2015 Mellanox Technologies
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 29, 2018
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.Dt MLX5EN 4
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.Os
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.Sh NAME
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.Nm mlx5en
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.Nd "Mellanox ConnectX-4, ConnectX-4 LX and ConnectX-5 based 100Gb, 50Gb, 40Gb, 25Gb and 10Gb Ethernet adapter driver"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "options COMPAT_LINUXKPI"
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.Cd "options RATELIMIT"
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.Cd "device mlx5"
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.Cd "device mlx5en"
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.Ed
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.Pp
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To load the driver as a module at run-time,
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run the following command as root:
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.Bd -literal -offset indent
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kldload mlx5en
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.Ed
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.Pp
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To load the driver as a
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module at boot time, place the following lines in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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mlx5en_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for PCI Express Ethernet adapters based on
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ConnectX-4, ConnectX-4 LX and ConnectX-5.
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The driver supports Jumbo Frames, Transmit/Receive checksum offload,
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TCP segmentation offload (TSO), Large Receive Offload (LRO),
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HW Large Receive Offload (HW LRO), VLAN tag insertion/extraction,
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VLAN checksum offload, VLAN TSO, hardware rate limiting (TXRTLMT)
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and Receive Side Steering (RSS).
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.br
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The network interface is named mce.
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.br
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For further hardware information and questions related to hardware
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requirements, see
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.Pa http://www.mellanox.com/ .
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.Pp
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For more information on configuring this device, see
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.Xr ifconfig 8 .
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.Sh HARDWARE
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The
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.Nm
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driver supports 100Gb, 50Gb, 40Gb, 25Gb and 10Gb Ethernet adapters.
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ConnectX-5 supports:10/20/25/40/50/56/100Gb/s speeds.
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ConnectX-4 supports:10/20/25/40/50/56/100Gb/s speeds.
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ConnectX-4 LX supports:10/25/40/50Gb/s speeds (and reduced power consumption) :
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.Pp
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.Bl -bullet -compact
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.It
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Mellanox MCX455A-ECAT
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.It
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Mellanox MCX456A-ECAT
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.It
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Mellanox MCX415A-CCAT
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.It
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Mellanox MCX416A-CCAT
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.It
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Mellanox MCX455A-FCAT
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.It
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Mellanox MCX456A-FCAT
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.It
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Mellanox MCX415A-BCAT
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.It
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Mellanox MCX416A-BCAT
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.It
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Mellanox MCX4131A-GCAT
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.It
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Mellanox MCX4131A-BCAT
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.It
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Mellanox MCX4121A-ACAT
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.It
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Mellanox MCX4111A-ACAT
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.It
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Mellanox MCX4121A-XCAT
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.It
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Mellanox MCX4111A-XCAT
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.El
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.Sh SUPPORT
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For general information and support,
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go to the Mellanox support website at:
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.Pa http://www.mellanox.com/ .
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.Pp
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If an issue is identified with this driver with a supported adapter,
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email all the specific information related to the issue to
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.Aq Mt freebsd-drivers@mellanox.com .
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.Sh SEE ALSO
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.Xr ifconfig 8
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 11.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Mellanox Technologies <freebsd-drivers@mellanox.com> .
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