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FXP(4)			 BSD Kernel Interfaces Manual			FXP(4)

     fxp -- Intel EtherExpress PRO/100 Ethernet	device driver

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

	   device miibus
	   device fxp

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


     The fxp driver provides support for Ethernet adapters based on the	Intel
     i82557, i82558, i82559, i82550, and i82562	chips.	The driver supports
     TCP/UDP/IP	checksum offload for both transmit and receive on i82550 and
     i82551.  On i82559	only TCP/UDP checksum offload for receive is sup-
     ported.  TCP segmentation offload (TSO) for IPv4 as well as VLAN hardware
     tag insertion/stripping is	supported on i82550 and	i82551.	 Wake On Lan
     (WOL) support is provided on all controllers except i82557, i82259ER and
     early i82558 revisions.

     The fxp driver supports the following media types:

     autoselect	  Enable autoselection of the media type and options.  The au-
		  toselected mode can be overridden by adding the media	op-
		  tions	to rc.conf(5).

     10baseT/UTP  Set 10Mbps operation.

     100baseTX	  Set 100Mbps (Fast Ethernet) operation.

     The fxp driver supports the following media options:

     full-duplex  Force	full duplex operation.

     half-duplex  Force	half duplex operation.

     Note that 100baseTX media type is not available on	the Pro/10.  For fur-
     ther information on configuring this device, see ifconfig(8).

     The fxp driver supports reception and transmission	of extended frames for
     vlan(4).  This capability of fxp can be controlled	by means of the
     vlanmtu parameter to ifconfig(8).

     The fxp driver also supports a special link option:

     link0  Some chip revisions	have loadable microcode	which can be used to
	    reduce the interrupt load on the host cpu.	Not all	boards have
	    microcode support.	Setting	the link0 flag with ifconfig(8)	will
	    download the microcode to the chip if it is	available.

     Adapters supported	by the fxp driver include:

     o	 Intel EtherExpress PRO/10
     o	 Intel InBusiness 10/100
     o	 Intel PRO/100B	/ EtherExpressPRO/100 B	PCI Adapter
     o	 Intel PRO/100+	Management Adapter
     o	 Intel PRO/100 VE Desktop Adapter
     o	 Intel PRO/100 VM Network Connection
     o	 Intel PRO/100 M Desktop Adapter
     o	 Intel PRO/100 S Desktop, Server and Dual-Port Server Adapters
     o	 Contec	C-NET(PI)-100TX	(PC-98)
     o	 NEC PC-9821Ra20, Rv20,	Xv13, Xv20 internal 100Base-TX (PC-98)
     o	 NEC PC-9821X-B06 (PC-98)
     o	 Many on-board network interfaces on Intel motherboards

     Tunables can be set at the	loader(8) prompt before	booting	the kernel or
     stored in loader.conf(5).	The following variables	are available as both
     loader(8) tunables	and sysctl(8) variables:

	     Maximum amount of time, in	microseconds, that an interrupt	may be
	     delayed in	an attempt to coalesce interrupts.  This is only ef-
	     fective if	the Intel microcode is loaded.	The accepted range is
	     300 to 3000, the default is 1000.

	     Number of packets that will be bundled, before an interrupt is
	     generated.	 This is only effective	if the Intel microcode is
	     loaded.  The accepted range is 1 to 65535,	the default is 6.

     The following variables are available as sysctl(8)	variables.

	     This is a read-only variable and shows the	number of events of
	     RNR (resource not ready).

	     This is a read-only variable and displays useful MAC counters
	     maintained	in the driver.

     fxp%d: couldn't map memory	 A fatal initialization	error has occurred.

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

     fxp%d: Failed to malloc memory  There are not enough mbuf's available for

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

     fxp%d: Microcode loaded, int_delay: %d usec  bundle_max: %d  The chip has
     successfully downloaded the microcode, and	changed	the parameterized val-
     ues to the	given settings.

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

     The fxp device driver first appeared in FreeBSD 2.1.

     The fxp device driver was written by David	Greenman.  It has then been
     updated to	use the	busdma API and made endian-clean by Maxime Henrion.
     This manual page was written by David E. O'Brien.

BSD			       November	26, 2010			   BSD


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