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 receive 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 Sundance/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 Sundance/Tamarack TC9021
     based Gigabit Ethernet controller chips, including:

     •   Antares Microsystems Gigabit Ethernet
     •   ASUS NX1101 Gigabit Ethernet
     •   D-Link DL-4000 Gigabit Ethernet
     •   IC Plus IP1000A Gigabit Ethernet
     •   Sundance ST-2021 Gigabit Ethernet
     •   Sundance ST-2023 Gigabit Ethernet
     •   Sundance TC9021 Gigabit Ethernet
     •   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 accepted range is 1 to 255,
             default value is 8 frames.  The interface 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>.