6bd57d14ed
New design allows to attach multiple consumers to ntb_transport(4) instance. Previous design obtained from Linux theoretically allowed that, but was not practically usable (Linux also has only one consumer driver now).
80 lines
2.9 KiB
Groff
80 lines
2.9 KiB
Groff
.\"
|
|
.\" Copyright (c) 2016 Alexander Motin <mav@FreeBSD.org>
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd July 29, 2016
|
|
.Dt NTB_TRANSPORT 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm ntb_transport
|
|
.Nd Packet-oriented transport for Non-Transparent Bridges
|
|
.Sh SYNOPSIS
|
|
To load the driver as a module at boot, place the following line in
|
|
.Xr loader.conf 5 :
|
|
.Bd -literal -offset indent
|
|
ntb_transport_load="YES"
|
|
.Ed
|
|
.Pp
|
|
The following tunables are settable from the
|
|
.Xr loader 8 :
|
|
.Bl -ohang
|
|
.It Va hw.ntb_transport.debug_level
|
|
Driver debug level.
|
|
The default value is 0, higher means more verbose.
|
|
.It Va hint.ntb_transport. Ns Ar X Ns Va .config
|
|
Configures queues allocation for consumer devices, separated by commas.
|
|
Each device can be configured as: "<name>[:<queues>]", where:
|
|
.Va name
|
|
is a name of the driver which should attach the device (empty means any),
|
|
.Va queues
|
|
is a number of queues to allocate (empty means automatic),
|
|
The default configuration is empty string, which means single device
|
|
with one queue per memory window allowing any driver attachment.
|
|
.El
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
driver attaches on top of the
|
|
.Nm ntb
|
|
driver to utilize its resources to create set of bidirectional queues,
|
|
delivering packets between the systems.
|
|
The primary purpose of this is to be used by
|
|
.Nm if_ntb
|
|
network interface, but other consumers may also be developed using KPI.
|
|
.Sh SEE ALSO
|
|
.Xr if_ntb 4 ,
|
|
.Xr ntb_hw 4
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
The
|
|
.Nm
|
|
driver was developed by Intel and originally written by
|
|
.An Carl Delsey Aq Mt carl@FreeBSD.org .
|
|
Later improvements were done by
|
|
.An Conrad E. Meyer Aq Mt cem@FreeBSD.org
|
|
and
|
|
.An Alexander Motin Aq Mt mav@FreeBSD.org .
|