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STE(4)			 BSD Kernel Interfaces Manual			STE(4)

     ste -- Sundance Technologies ST201	Fast Ethernet device driver

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

	   device miibus
	   device ste

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


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

     The Sundance ST201	uses bus master	DMA and	is designed to be a 3Com
     Etherlink XL workalike.  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 en-
     try 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 user can	manually override the autoselected
			   mode	by adding media	options	to the /etc/rc.conf

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

     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).

     The ste driver supports Sundance Technologies ST201 based Fast Ethernet
     adapters and embedded controllers including:

     o	 D-Link	DFE-530TXS
     o	 D-Link	DFE-550TX
     o	 D-Link	DFE-580TX

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

	     Maximum number of time to delay RX	interrupts.  The valid range
	     is	0 to 209712 in units of	1us, the default is 150	(150us).  The
	     value 0 effectively disables the RX interrupt moderation.	The
	     resolution	of of timer is about 3.2us so finer tuning than	3.2us
	     wouldn't be available.  The interface does	not need to be brought
	     down and up again before a	change takes effect.

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

     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 will not 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	you see	this message at	boot time and the driver fails to attach the
     device as a network interface, you	will have to perform a second warm
     boot to have the device properly configured.

     Note that this condition only occurs when warm booting from another oper-
     ating system.  If you power down your system prior	to booting FreeBSD,
     the card should be	configured correctly.

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

     Sundance ST201 data sheet,

     The ste device driver first appeared in FreeBSD 3.0.

     The ste driver was	written	by Bill	Paul <>.

BSD			       December	24, 2009			   BSD


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