STE(4)                    OpenBSD Programmer's Manual                   STE(4)

NAME
     ste - Sundance Technologies ST201 10/100 Ethernet device

SYNOPSIS
     ste* at pci?

DESCRIPTION
     The ste driver provides support for PCI Ethernet adapters and embedded
     controllers based on the Sundance Technologies ST201 PCI Fast Ethernet
     controller chip.  This includes:

           o   D-Link DFE-550TX
           o   D-Link DFE-580TX
           o   Encore ENL832-TX-ICNT 10/100 M PCI

     The Sundance ST201 uses bus master DMA and is designed to be a 3Com
     EtherLink XL work-alike.  It uses the same DMA descriptor structure and
     is very similar in operation, however its register layout is different.
     The ST201 has a 64-bit multicast hash filter and a single perfect filter
     entry for the station address.  It supports both 10 and 100Mbps speeds in
     either full or half duplex using an MII transceiver.

     The ste driver supports the following media types:

     autoselect   Enable autoselection of the media type and options.  The us-
                  er can manually override the autoselected mode by adding me-
                  dia options to the hostname.if(5) file.

     10baseT      Set 10Mbps operation.  The mediaopt option can also be used
                  to select either full-duplex or half-duplex modes.

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

     The ste 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
     ste%d: couldn't map ports/memory  A fatal initialization error has oc-
     curred.

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

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

     ste%d: no memory for rx list  The driver failed to allocate an mbuf for
     the receiver ring.

     ste%d: no memory for tx list  The driver failed to allocate an mbuf for
     the transmitter ring when allocating a pad buffer or collapsing an mbuf
     chain into a cluster.

     ste%d: chip is in D3 power state -- setting to D0  This message applies
     only to adapters which support power management.  Some operating systems
     place the controller in low power mode when shutting down, and some PCI
     BIOSes fail to bring the chip out of this state before configuring it.
     The controller loses all of its PCI configuration in the D3 state, so if
     the BIOS does not set it back to full power mode in time, it won't be
     able to configure it correctly.  The driver tries to detect this condi-
     tion and bring the adapter back to the D0 (full power) state, but this
     may not be enough to return the driver to a fully operational condition.
     If this message appears at boot time and the driver fails to attach the
     device as a network interface, a second warm boot will have to be per-
     formed to have the device properly configured.

     Note that this condition only occurs when warm booting from another oper-
     ating system.  If the system is powered down prior to booting OpenBSD,
     the card should be configured correctly.

SEE ALSO
     arp(4), ifmedia(4), intro(4), netintro(4), pci(4), hostname.if(5),
     ifconfig(8)

     Sundance ST201 data sheet, http://www.sundanceti.com.

HISTORY
     The ste device driver first appeared in FreeBSD 3.0.  OpenBSD support was
     added in OpenBSD 2.7.

AUTHORS
     The ste driver was written by Bill Paul <wpaul@ee.columbia.edu> and port-
     ed to OpenBSD by Aaron Campbell <aaron@openbsd.org>.

OpenBSD 4.7                      May 31, 2007                                2
