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NAME

     sf - Adaptec AIC-6915 "Starfire" PCI Fast Ethernet adapter driver

SYNOPSIS

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

           device miibus
           device sf

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

           if_sf_load="YES"

DESCRIPTION

     The sf driver provides support for Adaptec Duralink Fast Ethernet
     adapters based on the Adaptec AIC-6915 "Starfire" chipset.

     The AIC-6915 is a bus master controller with an MII interface.  It
     supports high and low priority transmit and receive queues, TCP/IP
     checksum offload, multiple DMA descriptor formats and both polling and
     producer/consumer DMA models.  The AIC-6915 receive filtering options
     include a 16 entry perfect filter, a 512-bit hash table for multicast
     addresses, a 512-bit hash table for priority address matching and VLAN
     filtering.  An external MII-compliant transceiver is required for media
     interfacing.

     Multiport adapters consist of several AIC-6915 controllers connected via
     a PCI to PCI bridge.  Each controller is treated as a separate interface
     by the sf driver.

     The sf 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 sf 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

     Adapters supported by the sf driver include:

     ·   ANA-62011 64-bit single port 10/100baseTX adapter
     ·   ANA-62022 64-bit dual port 10/100baseTX adapter
     ·   ANA-62044 64-bit quad port 10/100baseTX adapter
     ·   ANA-69011 32-bit single port 10/100baseTX adapter
     ·   ANA-62020 64-bit single port 100baseFX adapter

SYSCTL VARIABLES

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

     dev.sf.%d.int_mod
             Maximum amount of time to delay interrupt processing in units of
             102.4us.  The accepted range is 0 to 31, the default value is 1
             (102.4us).  Value 0 completely disables the interrupt moderation.
             The interface does not need to be brought down and up again
             before a change takes effect.

     dev.sf.%d.stats
             Display lots of useful MAC counters maintained in the driver.

DIAGNOSTICS

     sf%d: couldnt map memory  A fatal initialization error has occurred.
     This may happen if the PCI BIOS not configured the device, which may be
     because the BIOS has been configured for a "Plug and Play" operating
     system.  The "Plug and Play OS" setting in the BIOS should be set to "no"
     or "off" in order for PCI devices to work properly with FreeBSD.

     sf%d: couldnt map ports  A fatal initialization error has occurred.
     This may happen if the PCI BIOS not configured the device, which may be
     because the BIOS has been configured for a "Plug and Play" operating
     system.  The "Plug and Play OS" setting in the BIOS should be set to "no"
     or "off" in order for PCI devices to work properly with FreeBSD.

     sf%d: couldnt map interrupt  A fatal initialization error has occurred.

     sf%d: no memory for softc struct!  The driver failed to allocate memory
     for per-device instance information during initialization.

     sf%d: failed to enable I/O ports/memory mapping!  The driver failed to
     initialize PCI I/O port or shared memory access.  This might happen if
     the card is not in a bus-master slot.

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

SEE ALSO

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

     The Adaptec AIC-6915 Programmers Manual,
     http://download.adaptec.com/pdfs/user_guides/aic6915_pg.pdf.

HISTORY

     The sf device driver first appeared in FreeBSD 3.0.

AUTHORS

     The sf driver was written by Bill Paul 〈wpaul@ctr.columbia.edu〉.