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BGE(4)			     Kernel Interfaces Manual			  BGE(4)

NAME
     bge -- Broadcom BCM570x/5721/5750/5751 PCI Gigabit Ethernet adapter driver

SYNOPSIS
     device miibus
     device bge

DESCRIPTION
     The  bge  driver  provides  support  for various NICs based on the Broadcom
     BCM570x 5721, 5750 and 5751 families of Gigabit Ethernet controller  chips,
     including the following:

     *	 3Com 3c996-T (10/100/1000baseTX)
     *	 Dell PowerEdge 2550 integrated BCM5700 NIC (10/100/1000baseTX)
     *	 HP ProLiant NC7760 embedded Gigabit NIC (10/100/1000baseTX)
     *	 HP ProLiant NC7770 PCI-X Gigabit NIC (10/100/1000baseTX)
     *	 HP ProLiant NC7781 embedded PCI-X Gigabit NIC (10/100/1000baseTX)
     *	 IBM x235 server integrated BCM5703x NIC (10/100/1000baseTX)
     *	 Netgear GA302T (10/100/1000baseTX)
     *	 SysKonnect SK-9D21 (10/100/1000baseTX)
     *	 SysKonnect SK-9D41 (1000baseSX)

     All of these NICs are capable of 10, 100 and 1000Mbps speeds over CAT5 cop-
     per  cable,  except for the SysKonnect SK-9D41 which supports only 1000Mbps
     over multimode fiber.  The BCM570x builds upon the technology of the Alteon
     Tigon II.	It has two R4000 CPU cores and is PCI v2.2 and PCI-X  v1.0  com-
     pliant.  It supports IP, TCP and UDP checksum checksum offload for both re-
     ceive  and  transmit,  multiple  RX  and TX DMA rings for QoS applications,
     rules-based receive filtering, and VLAN tag stripping/insertion as well  as
     a	256-bit  multicast hash filter.  Additional features may be provided via
     value-add firmware updates.  The BCM570x supports TBI (ten  bit  interface)
     and  GMII	transceivers,  which  means it can be used with either copper or
     1000baseX fiber applications.  Note however the device only supports a sin-
     gle speed in TBI mode.

     Most cards also use the Broadcom BCM5401 or BCM5411 10/100/1000 copper  gi-
     gabit  tranceivers,  which  support autonegotiation of 10, 100 and 1000Mbps
     modes in full or half duplex.

     The BCM5700 also supports jumbo frames, which can be configured via the in-
     terface MTU setting.  Selecting an MTU larger than 1500 bytes with the  if-
     config(8)	utility  configures  the  adapter  to receive and transmit jumbo
     frames.  Using jumbo frames can greatly  improve  performance  for  certain
     tasks, such as file transfers and data streaming.

     The bge 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
		  modes.

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

     1000baseTX   Set  1000baseTX operation over twisted pair.	Only full-duplex
		  mode is supported.

     1000baseSX   Set 1000Mbps (Gigabit Ethernet) operation.   Both  full-duplex
		  and half-duplex modes are supported.

     The bge driver supports the following media options:

     full-duplex  Force full duplex operation.

     half-duplex  Force half duplex operation.

     The bge driver also supports one special link option for 1000baseTX cards:

     link0  With  1000baseTX  cards,  establishing  a link between two ports re-
	    quires that one port be configured as  a  master  and  the	other  a
	    slave.  With autonegotiation, the master/slave settings will be cho-
	    sen  automatically.  However when manually selecting the link state,
	    it is necessary to force one side of the link to be a master and the
	    other a slave.  The bge driver configures the ports as slaves by de-
	    fault.  Setting the link0 flag with ifconfig(8) will set a port as a
	    master instead.

     For more information on configuring this device, see ifconfig(8).

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

     bge%d: couldn't map ports	A fatal initialization error has occurred.

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

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

     bge%d:  failed  to  enable memory mapping!  The driver failed to initialize
     PCI shared memory mapping.  This might happen if the card is not in a  bus-
     master slot.

     bge%d:  no  memory for jumbo buffers!  The driver failed to allocate memory
     for jumbo frames during initialization.

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

SEE ALSO
     arp(4), miibus(4), netintro(4), ng_ether(4), vlan(4), ifconfig(8)

HISTORY
     The bge device driver first appeared in FreeBSD 4.5.

AUTHORS
     The bge driver was written by Bill Paul <wpaul@windriver.com>.

FreeBSD 4.11			December 18, 2004			  BGE(4)
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