1.\" 2.\" Copyright (c) 2016 Alexander Motin <mav@FreeBSD.org> 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 THE 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 THE 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 29, 2016 29.Dt NTB_TRANSPORT 4 30.Os 31.Sh NAME 32.Nm ntb_transport 33.Nd Packet-oriented transport for Non-Transparent Bridges 34.Sh SYNOPSIS 35To load the driver as a module at boot, place the following line in 36.Xr loader.conf 5 : 37.Bd -literal -offset indent 38ntb_transport_load="YES" 39.Ed 40.Pp 41The following tunables are settable from the 42.Xr loader 8 : 43.Bl -ohang 44.It Va hw.ntb_transport.debug_level 45Driver debug level. 46The default value is 0, higher means more verbose. 47.It Va hint.ntb_transport. Ns Ar X Ns Va .config 48Configures queues allocation for consumer devices, separated by commas. 49Each device can be configured as: "<name>[:<queues>]", where: 50.Va name 51is a name of the driver which should attach the device (empty means any), 52.Va queues 53is a number of queues to allocate (empty means automatic), 54The default configuration is empty string, which means single device 55with one queue per memory window allowing any driver attachment. 56.El 57.Sh DESCRIPTION 58The 59.Nm 60driver attaches on top of the 61.Nm ntb 62driver to utilize its resources to create set of bidirectional queues, 63delivering packets between the systems. 64The primary purpose of this is to be used by 65.Nm if_ntb 66network interface, but other consumers may also be developed using KPI. 67.Sh SEE ALSO 68.Xr if_ntb 4 , 69.Xr ntb_hw 4 70.Sh AUTHORS 71.An -nosplit 72The 73.Nm 74driver was developed by Intel and originally written by 75.An Carl Delsey Aq Mt carl@FreeBSD.org . 76Later improvements were done by 77.An Conrad E. Meyer Aq Mt cem@FreeBSD.org 78and 79.An Alexander Motin Aq Mt mav@FreeBSD.org . 80