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SIS(4)			 BSD Kernel Interfaces Manual			SIS(4)

     sis -- SiS	900, SiS 7016 and NS DP83815/DP83816 Fast Ethernet device

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

	   device miibus
	   device sis

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


     The sis driver provides support for PCI Ethernet adapters and embedded
     controllers based on the Silicon Integrated Systems SiS 900 and SiS 7016
     Fast Ethernet controller chips.

     This driver also supports adapters	based on the National Semiconductor
     DP83815 (MacPhyter) and DP83816 PCI Ethernet controller chip.

     The SiS 900 is a 100Mbps Ethernet MAC and MII-compliant transceiver in a
     single package.  It uses a	bus master DMA and a scatter/gather descriptor
     scheme.  The SiS 7016 is similar to the SiS 900 except that it has	no in-
     ternal PHY, requiring instead an external transceiver to be attached to
     its MII interface.	 The SiS 900 and SiS 7016 both have a 128-bit multi-
     cast hash filter and a single perfect filter entry	for the	station	ad-

     The NS DP83815 is also a 100Mbps Ethernet MAC with	integrated PHY.	 The
     NatSemi chip and the SiS 900 share	many of	the same features and a	fairly
     similar programming interface, hence both chips are supported by the same

     The sis 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 rc.conf(5).

     10baseT/UTP  Set 10Mbps operation.	 The ifconfig(8) mediaopt option can
		  also be used to select either	`full-duplex' or `half-duplex'

     100baseTX	  Set 100Mbps (Fast Ethernet) operation.  The ifconfig(8)
		  mediaopt option can also be used to select either
		  `full-duplex'	or `half-duplex' modes.

     The sis 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 sis driver supports Silicon Integrated	Systems	SiS 900	and SiS	7016
     based Fast	Ethernet adapters and embedded controllers, as well as Fast
     Ethernet adapters based on	the National Semiconductor DP83815 (MacPhyter)
     and DP83816 chips.	 Supported adapters include:

     +o	 @Nifty	FNECHARD IFC USUP-TX
     +o	 Netgear FA311-TX (DP83815)
     +o	 Netgear FA312-TX (DP83815)
     +o	 SiS 630, 635, and 735 motherboard chipsets
     +o	 Soekris Engineering net45xx, net48xx, lan1621,	and lan1641

     The following variable is available as both sysctl(8) variable and
     loader(8) tunable:

	     This variable controls how	to pad short frames for
	     DP83815/DP83816 controllers on the	specified device.
	     DP83815/DP83816 controllers are known to pad 0xFF for short
	     frames which is violation of RFC 1042.  Set this variable to a
	     non-zero value to let driver manually pad each short frame	with
	     zeros at the cost of extra	CPU cycles.  The default value is 0 to
	     let hardware perform automatic padding.

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

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

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

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

     sis%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.

     sis%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 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)

     SiS 900 and SiS 7016 datasheets,

     NatSemi DP83815 datasheet,

     The sis device driver first appeared in FreeBSD 3.0.

     The sis driver was	written	by Bill	Paul <>.

BSD			       September 2, 2010			   BSD


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