NAME

     ste — Sundance Technologies ST201 Fast Ethernet device driver

SYNOPSIS

     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):

           if_ste_load="YES"

DESCRIPTION

     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 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 user can manually override
                           the autoselected mode by adding media options to the /etc/rc.conf file.

     10baseT/UTP           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).

HARDWARE

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

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

SYSCTL VARIABLES

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

     dev.ste.%d.int_rx_mod
             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 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.

DIAGNOSTICS

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

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

     ste%d: watchdog timeout  The device has stopped responding to the network, 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 condition 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 operating system.  If you power down
     your system prior to booting FreeBSD, the card should be configured correctly.

SEE ALSO

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

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

HISTORY

     The ste device driver first appeared in FreeBSD 3.0.

AUTHORS

     The ste driver was written by Bill Paul <wpaul@ee.columbia.edu>.