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NetBSD 6.1.5 - man page for re (netbsd section 4)

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RE(4)				   BSD Kernel Interfaces Manual 			    RE(4)

NAME
     re -- RealTek 8139C+/8169/8169S/8110S PCI Ethernet adapter driver

SYNOPSIS
     re* at pci? dev ? function ?
     re* at cardbus? function ?

DESCRIPTION
     The re driver provides support for various NICs based on the RealTek RTL8139C+, RTL8169,
     RTL8169S, and RTL8110S PCI/Cardbus Ethernet controllers, including the following:

     o	 Alloy Computer Products EtherGOLD 1439E 10/100 (8139C+)
     o	 Compaq Evo N1015v Integrated Ethernet (8139C+)
     o	 Gigabyte 7N400 Pro2 Integrated Gigabit Ethernet (8110S)
     o	 NETGEAR GA311 (8169S)
     o	 PLANEX COMMUNICATIONS Inc. GN-1200TC (8169S)
     o	 Xterasys XN-152 10/100/1000 NIC (8169)
     o	 Corega CG-LAPCIGT Gigabit Ethernet (8169S)
     o	 D-Link DGE-528T Gigabit Ethernet (8169S)
     o	 US Robotics (3Com) USR997902 Gigabit Ethernet (8169S)
     o	 Linksys EG1032 rev. 3 Gigabit Ethernet (8169S)

     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.

     All NICs supported by the re driver have TCP/IP checksum offload and hardware VLAN tag-
     ging/insertion features, and use a descriptor-based DMA mechanism.  They are also capable of
     TCP large send (TCP segmentation offload).

     The 8139C+ is a single-chip solution combining both a 10/100 MAC and PHY, and its PHY is
     supported by rlphy(4).  The 8169 is a 10/100/1000 MAC only, requiring a GMII or TBI external
     PHY and some 8169 based boards have Marvell 88E1000 PHY supported by makphy(4).  The 8169S
     and 8110S are single-chip devices containing both a 10/100/1000 MAC and 10/100/1000 copper
     PHY, which is supported by rgephy(4).  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.

     The 8169, 8169S, and 8110S also support jumbo frames, which can be configured via the inter-
     face MTU setting.	Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility con-
     figures the adapter to receive and transmit jumbo frames.

     The re driver supports the following media types:

     autoselect   Enable autoselection of the media type and options.  The user can manually
		  override the autoselected mode by adding media options to rc.conf(5).

     10baseT/UTP  Set 10Mbps operation.  The ifconfig(8) mediaopt option can also be used to
		  select either full-duplex or half-duplex modes.

     100baseTX	  Set 100Mbps (Fast Ethernet) operation.  The ifconfig(8) mediaopt option can
		  also be used to select either full-duplex or half-duplex modes.

     1000baseTX   Set 1000baseTX operation over twisted pair.  The RealTek GigE chips support
		  1000Mbps in full-duplex mode only.

     The re driver supports the following media options:

     full-duplex  Force full duplex operation.

     half-duplex  Force half duplex operation.

     For more information on configuring this device, see ifconfig(8).

DIAGNOSTICS
     re%d: can't map i/o space	A fatal initialization error has occurred.

     re%d: can't map mem space	A fatal initialization error has occurred.

     re%d: couldn't map interrupt  A fatal initialization error has occurred.

     re%d: watchdog timeout  The device has stopped responding to the network, or there is a
     problem with the network connection (cable).

SEE ALSO
     arp(4), cardbus(4), mii(4), netintro(4), pci(4), rgephy(4), rlphy(4), ifconfig(8)

     RealTek Semiconductor RTL8139C+, RTL8169, RTL8169S, and RTL8110S datasheets,
     http://www.realtek.com.tw.

HISTORY
     The re device driver first appeared in FreeBSD 5.2 and was ported to NetBSD 2.0.

AUTHORS
     The re driver was written by Bill Paul <wpaul@windriver.com>.

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 perform-
     ing 64-bit DMA transfers even though a 64-bit data path between the NIC and the bus does not
     actually exist.

     Unfortunately, it is not possible to correct this problem in software, however it is possi-
     ble to detect it.	When the re 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.

     The RealTek 8169, 8169S, and 8110S chips appear to only be capable of transmitting jumbo
     frames up to 7.5K in size.

BSD					 January 8, 2007				      BSD
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