path: root/share/man/man4/re.4

.\" $OpenBSD: re.4,v 1.20 2005/09/30 20:34:24 jaredy Exp $
.\" Copyright (c) 2003
.\"	Bill Paul <wpaul@windriver.com>. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
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.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by Bill Paul.
.\" 4. Neither the name of the author nor the names of any co-contributors
.\"    may be used to endorse or promote products derived from this software
.\"   without specific prior written permission.
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.\" $FreeBSD: /repoman/r/ncvs/src/share/man/man4/re.4,v 1.4 2004/03/04 06:42:46 sanpei Exp $
.\"
.Dd September 4, 2003
.Dt RE 4
.Os
.Sh NAME
.Nm re
.Nd "Realtek 8169/8169S/8110S PCI Gigabit Ethernet adapter driver"
.Sh SYNOPSIS
.Cd "re* at pci?"
.Cd "re* at cardbus?"
.Cd "rgephy* at mii?"
.Sh DESCRIPTION
The
.Nm
driver provides support for various NICs based on the
.\" RealTek RTL8139C+,
RTL8169, RTL8169S, and RTL8110S PCI Ethernet controllers, including
the following:
.Pp
.Bl -bullet -compact
.\" .It
.\" Alloy Computer Products EtherGOLD 1439E 10/100 (8139C+)
.It
Buffalo LGY-PCI-GT (8169S)
.\" .It
.\" Compaq Evo N1015v Integrated Ethernet (8139C+)
.It
Corega CG-LAPCIGT (8169S)
.It
D-Link DGE-528T (8169S)
.It
Gigabyte 7N400 Pro2 Integrated Gigabit Ethernet (8110S)
.It
LevelOne GNC-0105T (8169S)
.It
Linksys EG1032v3 (8169S)
.It
Netgear GA511 PC Card (8169)
.It
PLANEX COMMUNICATIONS Inc. GN-1200TC (8169S)
.It
Surecom EP-320G-TX1 (8169S)
.It
US Robotics USR997902 (8169S)
.It
Xterasys XN-152 10/100/1000 NIC (8169)
.El
.Pp
.\" NICs based on the 8139C+ are capable of 10 and 100Mbps speeds over CAT5
.\" cable.
NICs based on the 8169, 8169S and 8110S are capable of 10, 100 and
1000Mbps operation.
.Pp
All NICs supported by the
.Nm
driver have IPv4 receive IP/TCP/UDP checksum offload and use a descriptor-based
DMA mechanism.
.\" and hardware VLAN tagging/insertion features
.Pp
.\" The 8139C+ is a single-chip solution combining both a 10/100 MAC and PHY.
The 8169 is a 10/100/1000 MAC only, requiring a GMII or TBI external PHY.
The 8169S and 8110S are single-chip devices containing both a 10/100/1000
MAC and 10/100/1000 copper PHY.
Standalone 10/100/1000 cards are available in both 32-bit PCI and 64-bit
PCI models.
The 8110S is designed for embedded LAN-on-motherboard applications.
.Pp
The 8169, 8169S and 8110S also support Jumbo frames, which can be configured
via the interface MTU setting.
The MTU is limited to 7422, since the chip cannot transmit larger frames.
Selecting an MTU larger than 1500 bytes with the
.Xr ifconfig 8
utility configures the adapter to receive and transmit Jumbo frames.
.Pp
The
.Nm
driver supports the following media types:
.Bl -tag -width 10baseTXUTP
.It autoselect
Enable autoselection of the media type and options.
The user can manually override the autoselected mode by adding media options
to the appropriate
.Xr hostname.if 5
file.
.It 10baseT/UTP
Set 10Mbps operation.
The
.Xr ifconfig 8
.Ic mediaopt
option can also be used to select either
.Ar full-duplex
or
.Ar half-duplex
modes.
.It 100baseTX
Set 100Mbps (Fast Ethernet) operation.
The
.Xr ifconfig 8
.Ic mediaopt
option can also be used to select either
.Ar full-duplex
or
.Ar half-duplex
modes.
.It 1000baseTX
Set 1000baseTX operation over twisted pair.
The RealTek gigE chips support 1000Mbps in
.Ar full-duplex
mode only.
.\" .It 1000baseSX
.\" Set 1000Mbps (Gigabit Ethernet) operation.
.\" Both
.\" .Ar full-duplex
.\" and
.\" .Ar half-duplex
.\" modes are supported.
.El
.Pp
The
.Nm
driver supports the following media options:
.Bl -tag -width full-duplex
.It full-duplex
Force full duplex operation.
.It half-duplex
Force half duplex operation.
.El
.Pp
For more information on configuring this device, see
.Xr ifconfig 8 .
.Sh DIAGNOSTICS
.Bl -diag
.It "re%d: can't map mem space"
A fatal initialization error has occurred.
.It "re%d: can't map i/o space"
A fatal initialization error has occurred.
.It "re%d: couldn't map interrupt"
A fatal initialization error has occurred.
.It "re%d: watchdog timeout"
The device has stopped responding to the network, or there is a problem with
the network connection (cable).
.El
.Sh SEE ALSO
.Xr arp 4 ,
.Xr ifmedia 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr pci 4 ,
.Xr rgephy 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Rs
.%T RealTek Semiconductor RTL8139C+, RTL8169, RTL8169S and RTL8110S datasheets
.%O http://www.realtek.com.tw
.Re
.Sh HISTORY
The
.Nm
device driver first appeared in
.Ox 3.6 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Bill Paul Aq wpaul@windriver.com
and ported to
.Ox
by
.An Peter Valchev Aq pvalchev@openbsd.org .
.Sh BUGS
The Xterasys XN-152 32-bit PCI NIC, which uses the RTL8169 MAC and
Marvell 88E1000 PHY, has a defect that causes DMA corruption
if the board is plugged into a 64-bit PCI slot.
The defect lies in the board design, not the chip itself: the PCI REQ64#
and ACK64# lines should be pulled high, but they are not.
The result is that the 8169 chip is tricked into performing 64-bit DMA
transfers even though a 64-bit data path between the NIC and the bus does
not actually exist.
.Pp
Unfortunately, it is not possible to correct this problem in software,
however it is possible to detect it.
When the
.Nm
driver is loaded, it will run a diagnostic routine designed to
validate DMA operation by placing the chip in digital loopback mode
and initiating a packet transmission.
If the card functions properly, the transmitted data will be echoed back
unmodified.
If the echoed data is corrupt, the driver will print an error message on
the console and abort the device attach.
The user should ensure the NIC is installed in a 32-bit PCI slot to avoid
this problem.
.Pp
The RealTek 8169, 8169S and 8110S chips appear to only be capable of
transmitting jumbo frames up to 7.5K in size.