85 lines
3.2 KiB
Groff
85 lines
3.2 KiB
Groff
.\" $NetBSD: jme.4,v 1.6 2009/10/19 18:41:09 bouyer Exp $
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.\"
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.\" Copyright (c) 2008 Manuel Bouyer
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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 THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd October 17, 2008
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.Dt JME 4
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.Os
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.Sh NAME
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.Nm jme
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.Nd JMicron Technologies JMC250 Gigabit Ethernet and JMC260 Fast Ethernet controller driver
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.Sh SYNOPSIS
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.Cd "jme* at pci? dev ? function ?"
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.Pp
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Configuration of PHYs is 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 jme
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device driver supports network adapters based on the JMicron
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Technologies JMC250 Gigabit Ethernet and JMC260 Fast Ethernet chips.
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The following features are supported:
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.Bd -literal -offset indent
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IPv4 transmit/receive IP/TCP/UDP checksum offload
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IPv6 transmit TCP/UDP checksum offload
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IPv4 and IPv6 TCP segmentation offload
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VLAN tag insertion/removal
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Interrupt coalescing
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10/100/1000Mbps operation in full-duplex mode
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10/100Mbps operation in half-duplex mode
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Jumbo frames (up to 9022 bytes)
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.Ed
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.Pp
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Due to hardware limitation checksums and TCP segmentation offload can't
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be enabled if the configured MTU is larger than 4000 bytes.
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.Pp
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Interrupt coalescing can be controlled on a per-adapter basis through
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the following sysctls:
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.Bl -tag -width ".Cm hw.jme.jmeXxX.int_rxtos"
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.It Cm hw.jme.jme\*[Lt]x\*[Gt].int_rxtos
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jme receive interrupt moderation timer, in microseconds (defaults to 100)
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.It Cm hw.jme.jme\*[Lt]x\*[Gt].int_rxct
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jme receive interrupt moderation packet counter (defaults to 128)
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.It Cm hw.jme.jme\*[Lt]x\*[Gt].int_txto
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jme transmit interrupt moderation timer, in microseconds (defaults to 100)
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.It Cm hw.jme.jme\*[Lt]x\*[Gt].int_txct
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jme transmit interrupt moderation packet counter (defaults to 128)
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.El
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.Sh SEE ALSO
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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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device driver first appeared in
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.Nx 5.0 .
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.Sh BUGS
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Hardware bugs prevent support of IPv6 receive TCP/UDP checksum offload
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in the JMC250 rev A2, and is disabled in the driver.
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This should be revisited when a newer hardware revision is available.
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