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BGE(4)			     Kernel Interfaces Manual			  BGE(4)

NAME
     bge -- Broadcom BCM570x PCI Gigabit Ethernet adapter driver

SYNOPSIS
     device miibus
     device bge

DESCRIPTION
     The  bge  driver  provides  support  for various NICs based on the Broadcom
     BCM570x family of Gigabit Ethernet controller chips.

     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 offload for both receive  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  single  speed
     in TBI mode.

     Most   BCM5700-based  cards  also	use  the  Broadcom  BCM5401  or  BCM5411
     10/100/1000 copper gigabit transceivers, which support  autonegotiation  of
     10, 100 and 1000Mbps modes in full or half duplex.

     The BCM570x 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).

HARDWARE
     The  bge  driver  provides  support  for various NICs based on the Broadcom
     BCM570x family of Gigabit Ethernet controller chips, including the  follow-
     ing:

     *	 3Com 3c996-T (10/100/1000baseTX)
     *	 Dell PowerEdge 1750 integrated BCM5704C NIC (10/100/1000baseTX)
     *	 Dell PowerEdge 2550 integrated BCM5700 NIC (10/100/1000baseTX)
     *	 Dell PowerEdge 2650 integrated BCM5703 NIC (10/100/1000baseTX)
     *	 IBM x235 server integrated BCM5703x 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)
     *	 Netgear GA302T (10/100/1000baseTX)
     *	 SysKonnect SK-9D21 (10/100/1000baseTX)
     *	 SysKonnect SK-9D41 (1000baseSX)

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 5.3			  July 4, 2004				  BGE(4)
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