286 lines
9.0 KiB
Groff
286 lines
9.0 KiB
Groff
.\" Copyright (c) 2003
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.\" Bill Paul <wpaul@windriver.com>. 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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Bill Paul.
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.\" 4. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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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
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.\" THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd January 26, 2011
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.Dt RE 4
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.Os
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.Sh NAME
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.Nm re
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.Nd "RealTek 8139C+/8169/816xS/811xS/8168/810xE/8111 PCI/PCIe Ethernet adapter driver"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device miibus"
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.Cd "device re"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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if_re_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for various NICs based on the RealTek RTL8139C+,
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RTL8169, RTL816xS, RTL811xS, RTL8168, RTL810xE and RTL8111 PCI and
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PCIe Ethernet controllers.
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.Pp
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NICs based on the 8139C+ and 810xE are capable of 10 and 100Mbps speeds
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over CAT5 cable.
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NICs based on the 8169, 816xS, 811xS, 8168 and 8111 are capable of 10, 100
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and 1000Mbps operation.
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.Pp
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All NICs supported by the
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.Nm
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driver have TCP/IP checksum offload and hardware VLAN tagging/insertion
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features, and use a descriptor-based DMA mechanism.
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They are also
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capable of TCP large send (TCP segmentation offload).
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.Pp
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The 8139C+ is a single-chip solution combining both a 10/100 MAC and PHY.
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The 8169 is a 10/100/1000 MAC only, requiring a GMII or TBI external PHY.
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The 816xS, 811xS, 8168 and 8111 are single-chip devices containing both a
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10/100/1000 MAC and 10/100/1000 copper PHY.
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Standalone 10/100/1000 cards are available
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in both 32-bit PCI and 64-bit PCI models.
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The 8110S is designed for
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embedded LAN-on-motherboard applications.
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.Pp
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The 8169, 8169S and 8110S also support jumbo frames, which can be configured
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via the interface MTU setting.
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The MTU is limited to 7422, since the chip cannot transmit larger frames.
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Selecting an MTU larger than 1500 bytes with the
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.Xr ifconfig 8
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utility configures the adapter to receive and transmit jumbo frames.
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.Pp
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The
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.Nm
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driver supports the following media types:
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.Bl -tag -width ".Cm 10baseT/UTP"
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.It Cm autoselect
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Enable autoselection of the media type and options.
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The user can manually override
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the autoselected mode by adding media options to
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.Xr rc.conf 5 .
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.It Cm 10baseT/UTP
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Set 10Mbps operation.
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The
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.Xr ifconfig 8
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.Cm mediaopt
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option can also be used to select either
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.Cm full-duplex
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or
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.Cm half-duplex
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modes.
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.It Cm 100baseTX
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Set 100Mbps (Fast Ethernet) operation.
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The
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.Xr ifconfig 8
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.Cm mediaopt
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option can also be used to select either
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.Cm full-duplex
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or
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.Cm half-duplex
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modes.
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.It Cm 1000baseTX
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Set 1000baseTX operation over twisted pair.
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The RealTek gigE chips support 1000Mbps in
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.Cm full-duplex
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mode only.
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.\" .It Cm 1000baseSX
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.\" Set 1000Mbps (Gigabit Ethernet) operation.
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.\" Both
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.\" .Cm full-duplex
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.\" and
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.\" .Cm half-duplex
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.\" modes are supported.
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.El
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.Pp
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The
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.Nm
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driver supports the following media options:
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.Bl -tag -width ".Cm full-duplex"
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.It Cm full-duplex
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Force full duplex operation.
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.It Cm half-duplex
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Force half duplex operation.
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.El
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.Pp
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For more information on configuring this device, see
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.Xr ifconfig 8 .
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.Sh HARDWARE
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The
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.Nm
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driver supports RealTek RTL8139C+, RTL8169, RTL816xS, RTL811xS, RTL8168,
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RTL810xE and RTL8111 based Fast Ethernet and Gigabit Ethernet adapters including:
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.Pp
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.Bl -bullet -compact
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.It
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Alloy Computer Products EtherGOLD 1439E 10/100 (8139C+)
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.It
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Compaq Evo N1015v Integrated Ethernet (8139C+)
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.It
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Corega CG-LAPCIGT Gigabit Ethernet (8169S)
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.It
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D-Link DGE-528(T) Gigabit Ethernet (8169S)
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.It
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Gigabyte 7N400 Pro2 Integrated Gigabit Ethernet (8110S)
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.It
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LevelOne GNC-0105T (8169S)
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.It
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LinkSys EG1032 (32-bit PCI)
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.It
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PLANEX COMMUNICATIONS Inc.\& GN-1200TC (8169S)
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.It
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USRobotics USR997902 Gigabit Ethernet (8169S)
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.It
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Xterasys XN-152 10/100/1000 NIC (8169)
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.El
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.Sh LOADER TUNABLES
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Tunables can be set at the
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.Xr loader 8
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prompt before booting the kernel or stored in
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.Xr loader.conf 5 .
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.Bl -tag -width "xxxxxx"
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.It Va hw.re.intr_filter
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This tunable makes driver use interrupt filter handler on
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controllers that support MSI/MSI-X capability.
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If MSI/MSI-X is disabled by administrator this tunable has no
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effect and driver will use interrupt filter handler.
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The default value is 0 to use interrupt thread handler.
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.It Va hw.re.msi_disable
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This tunable disables MSI support on the Ethernet hardware.
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The default value is 0.
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.It Va hw.re.msix_disable
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This tunable disables MSI-X support on the Ethernet hardware.
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The default value is 0.
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.It Va hw.re.prefer_iomap
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This tunable controls which register mapping should be used on the
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specified device.
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A non-zero value enables I/O space register mapping.
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The default value is 0 to use memory space register mapping.
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.El
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.Sh SYSCTL VARIABLES
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The following variables are available as both
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.Xr sysctl 8
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variables and
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.Xr loader 8
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tunables:
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.Bl -tag -width "xxxxxx"
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.It Va dev.re.%d.int_rx_mod
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Maximum amount of time to delay receive interrupt processing in
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units of 1us.
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The accepted range is 0 to 65, the default is 65(65us).
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Value 0 completely disables the interrupt moderation.
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The interface need to be brought down and up again before a change
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takes effect.
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "re%d: couldn't map memory"
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A fatal initialization error has occurred.
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.It "re%d: couldn't map ports"
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A fatal initialization error has occurred.
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.It "re%d: couldn't map interrupt"
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A fatal initialization error has occurred.
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.It "re%d: no memory for softc struct!"
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The driver failed to allocate memory for per-device instance information
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during initialization.
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.It "re%d: failed to enable memory mapping!"
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The driver failed to initialize PCI shared memory mapping.
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This might
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happen if the card is not in a bus-master slot.
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.It "re%d: no memory for jumbo buffers!"
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The driver failed to allocate memory for jumbo frames during
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initialization.
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.It "re%d: watchdog timeout"
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The device has stopped responding to the network, or there is a problem with
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the network connection (cable).
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.El
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.Sh SEE ALSO
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.Xr altq 4 ,
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.Xr arp 4 ,
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.Xr miibus 4 ,
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.Xr netintro 4 ,
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.Xr ng_ether 4 ,
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.Xr polling 4 ,
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.Xr rgephy 4 ,
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.Xr vlan 4 ,
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.Xr ifconfig 8
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.Rs
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.%T RealTek Semiconductor RTL8139C+, RTL8169, RTL8169S and RTL8110S datasheets
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.%U http://www.realtek.com.tw/
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.Re
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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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.Fx 5.2 .
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.Sh AUTHORS
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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 Aq Mt wpaul@windriver.com .
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.Sh BUGS
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The Xterasys XN-152 32-bit PCI NIC, which uses the RTL8169 MAC and
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Marvell 88E1000 PHY, has a defect that causes DMA corruption
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if the board is plugged into a 64-bit PCI slot.
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The defect
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lies in the board design, not the chip itself: the PCI REQ64# and ACK64#
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lines should be pulled high, but they are not.
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The result is that the
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8169 chip is tricked into performing 64-bit DMA transfers even though
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a 64-bit data path between the NIC and the bus does not actually exist.
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.Pp
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Unfortunately, it is not possible to correct this problem in software,
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however it is possible to detect it.
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When the
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.Nm
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driver is loaded, it will run a diagnostic routine designed to
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validate DMA operation by placing the chip in digital loopback mode
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and initiating a packet transmission.
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If the card functions properly,
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the transmitted data will
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be echoed back unmodified.
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If the echoed data is corrupt, the driver
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will print an error message on the console and abort the device attach.
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The
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user should ensure the NIC is installed in a 32-bit PCI slot to
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avoid this problem.
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.Pp
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The RealTek 8169, 8169S and 8110S chips appear to only be capable of
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transmitting jumbo frames up to 7.5K in size.
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