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: couldn't 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: couldn't 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: couldn't 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 Programmer's 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>.