22ccdbf37c
with Communication Device Class Ethernet Emulation Model (CDC EEM). The driver supports both the device, and host side operation; there is a new USB template (#11) for the former. This enables communication with virtual USB NIC provided by iLO 5, as found in new HPE Proliant servers. Reviewed by: hselasky MFC after: 2 weeks Relnotes: yes Sponsored by: Hewlett Packard Enterprise
120 lines
3.6 KiB
Groff
120 lines
3.6 KiB
Groff
.\" Copyright (c) 2019 Edward Tomasz Napierala <trasz@FreeBSD.org>
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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 THE 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 THE 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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.Dd August 7, 2019
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.Dt CDCEEM 4
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.Os
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.Sh NAME
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.Nm cdceem
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.Nd "USB Communication Device Class Ethernet Emulation Model (CDC EEM) 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 "device uhci"
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.Cd "device ohci"
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.Cd "device usb"
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.Cd "device miibus"
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.Cd "device uether"
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.Cd "device cdceem"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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if_cdceem_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 USB devices based on the USB Communication
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Device Class Ethernet Emulation Model (CDC EEM) specification.
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.Pp
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The driver works on both host, and device-side; see
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.Xr usb_template 4
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for details.
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.Pp
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The USB device appears as a regular network interface on both sides,
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transporting Ethernet frames.
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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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.Pp
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The
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.Nm
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driver does not support different media types or options.
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.Sh SYSCTL VARIABLES
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The following variables are available as both
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.Xr sysctl 8
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variables and
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.Xr loader 8
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tunables:
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.Bl -tag -width indent
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.It Va hw.usb.cdceem.debug
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Verbosity level for log messages from the
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.Nm
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driver.
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Set to 0 to disable logging or 1 to warn about potential problems.
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Larger values enable debugging output.
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Defaults to 1.
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.It Va hw.usb.cdceem.send_echoes
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If set to 1, the driver will send an Echo EEM packet when the
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interface is brought up.
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While responding to Echo is mandatory, some devices cannot handle it.
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Only use for debugging.
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Defaults to 0.
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.It Va hw.usb.cdceem.send_fake_crc
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If set to 1, the driver will use 0xdeadbeef as the CRC value
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for outgoing Data EEM packets.
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Only use for debugging.
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Defaults to 0.
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.El
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.Sh SEE ALSO
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.Xr arp 4 ,
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.Xr cdce 4 ,
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.Xr intro 4 ,
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.Xr ipheth 4 ,
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.Xr netintro 4 ,
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.Xr urndis 4 ,
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.Xr usb 4 ,
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.Xr usb_template 4 ,
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.Xr ifconfig 8
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.Rs
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.%T "Universal Serial Bus Communications Class Subclass Specification for Ethernet Emulation Model Devices"
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.%U https://usb.org/sites/default/files/CDC_EEM10.pdf
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.Re
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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 13.0 .
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.Sh AUTHORS
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The
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.Nm
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driver was written by
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.An Edward Tomasz Napierala Aq Mt trasz@FreeBSD.org
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under sponsorship from Hewlett Packard Enterprise.
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