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STGE(4)			    Kernel Interfaces Manual		       STGE(4)

NAME
       stge -- Sundance/Tamarack TC9021	Gigabit	Ethernet adapter driver

SYNOPSIS
       To  compile  this  driver into the kernel, place	the following lines in
       your kernel configuration file:

	     device miibus
	     device stge

       Alternatively, to load the driver as a module at	boot time,  place  the
       following line in loader.conf(5):

	     if_stge_load="YES"

DESCRIPTION
       The  stge  device driver	provides support for various NICs based	on the
       Sundance/Tamarack TC9021	Gigabit	Ethernet controller chip.

       The Sundance/Tamarack TC9021 is found on	the D-Link  DGE-550T  and  the
       Antares	Microsystems  Gigabit Ethernet board.  It uses an external PHY
       or an external 10-bit interface.

       All NICs	supported by the stge driver have TCP/UDP/IP checksum  offload
       for  both  receive  and transmit, hardware VLAN tag stripping/insertion
       features, and receive interrupt	moderation  mechanism  as  well	 as  a
       64-bit  multicast  hash	filter.	 The Sundance/Tamarack TC9021 supports
       TBI (ten	bit interface) and GMII	transceivers, which means  it  can  be
       used with either	copper or 1000baseX fiber applications.

       The  Sundance/Tamarack  TC9021 also supports jumbo frames, which	can be
       configured via the interface MTU	setting.  Selecting an MTU larger than
       1500 bytes with the ifconfig(8) utility configures the adapter  to  re-
       ceive and transmit jumbo	frames.

       The stge	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 Sun-
		    dance/Tamarack supports 1000Mbps in	autoselect mode	only.

       The stge	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).

HARDWARE
       The stge	driver provides	support	for various NICs  based	 on  the  Sun-
       dance/Tamarack  TC9021 based Gigabit Ethernet controller	chips, includ-
       ing:

       o   Antares Microsystems	Gigabit	Ethernet
       o   ASUS	NX1101 Gigabit Ethernet
       o   D-Link DL-4000 Gigabit Ethernet
       o   IC Plus IP1000A Gigabit Ethernet
       o   Sundance ST-2021 Gigabit Ethernet
       o   Sundance ST-2023 Gigabit Ethernet
       o   Sundance TC9021 Gigabit Ethernet
       o   Tamarack TC9021 Gigabit Ethernet

SYSCTL VARIABLES
       The following variables are available as	both sysctl(8)	variables  and
       loader(8) tunables:

       dev.stge.%d.rxint_nframe
	       Number  of  frames  between  RxDMAComplete interrupts.  The ac-
	       cepted range is 1 to 255, default value is 8 frames.   The  in-
	       terface	has  to	 be  brought down and up again before a	change
	       takes effect.

       dev.stge.%d.rxint_dmawait
	       Maximum amount of time to wait in 1us increments	before issuing
	       an Rx interrupt if the number of	frames received	is  less  than
	       rxint_nframe.   The  accepted range is 0	to 4194, default value
	       is 30 microseconds.  The	interface has to be brought  down  and
	       up again	before a change	takes effect.

SEE ALSO
       altq(4),	  arp(4),  miibus(4),  netintro(4),  ng_ether(4),  polling(4),
       vlan(4),	ifconfig(8)

HISTORY
       The  stge  driver  was  ported  from  NetBSD  and  first	 appeared   in
       FreeBSD	6.2.   The  NetBSD  version  was  written  by  Jason R.	Thorpe
       <thorpej@NetBSD.org>.

AUTHORS
       The stge	driver was ported by Pyun YongHyeon <yongari@FreeBSD.org>.

FreeBSD	13.2		       November	23, 2010		       STGE(4)

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | SYSCTL VARIABLES | SEE ALSO | HISTORY | AUTHORS

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