116 lines
3.3 KiB
Groff
116 lines
3.3 KiB
Groff
.\" $NetBSD: bge.4,v 1.12 2009/09/26 06:47:55 wiz Exp $
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.\"
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.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Matthias Scheler <tron@NetBSD.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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd September 26, 2009
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.Dt BGE 4
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.Os
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.Sh NAME
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.Nm bge
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.Nd Broadcom BCM570x family Gigabit Ethernet driver
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.Sh SYNOPSIS
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.Cd "bge* at pci? dev ? function ?"
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.Pp
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Configuration of PHYs may also be necessary.
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See
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.Xr mii 4 .
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.Sh DESCRIPTION
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The
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.Nm
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device driver supports Gigabit Ethernet interfaces based on the Broadcom
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BCM570x family of Gigabit Ethernet chips and the BCM5906 chip.
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The interfaces supported by the
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.Nm
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driver include:
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.Bl -bullet
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.It
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3Com 3c996-T (10BASE-T/100BASE-TX/1000BASE-T)
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.It
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Dell PowerEdge 2550 integrated BCM5700 NIC (10BASE-T/100BASE-TX/1000BASE-T)
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.It
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IBM x235 server integrated BCM5703x NIC (10BASE-T/100BASE-TX/1000BASE-T)
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.It
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Netgear GA302T (10BASE-T/100BASE-TX/1000BASE-T)
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.It
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SysKonnect SK-9D21 (10BASE-T/100BASE-TX/1000BASE-T)
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.It
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SysKonnect SK-9D41 (1000BASE-SX)
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.El
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.Pp
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The BCM570x family supports IPv4/TCP/UDP checksumming in hardware.
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The
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.Nm
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driver supports this feature of the chip.
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See
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.Xr ifconfig 8
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for information on how to enable this feature.
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.Pp
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The level of interrupt mitigation for received packets can be adjusted
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with the
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.Li hw.bge.rx_lvl
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.Xr sysctl 8
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control.
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A value of 1 yields a
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.Nm
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interrrupt for every two full-sized Ethernet frames.
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Each increment of the value will, roughly, halve receive interrupt rate,
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up to a maximum of 5, which interrupts about every 30 to 40 full-sized
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TCP segments.
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.Sh SEE ALSO
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.Xr arp 4 ,
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.Xr bce 4 ,
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.Xr ifmedia 4 ,
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.Xr mii 4 ,
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.Xr netintro 4 ,
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.Xr pci 4 ,
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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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driver first appeared in
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.Nx 1.6.1 .
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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 Bill Paul
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.Aq wpaul@windriver.com
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for
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.Fx
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and ported to
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.Nx
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by
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.An Frank van der Linden
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.Aq fvdl@wasabisystems.com ,
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.An Jason R. Thorpe
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.Aq thorpej@wasabisystems.com
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and
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.An Jonathan Stone
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.Aq jonathan@dsg.stanford.edu .
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