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BGE(4)		       FreeBSD Kernel Interfaces Manual			BGE(4)

NAME
     bge -- Broadcom BCM57xx/BCM590x Gigabit/Fast Ethernet driver

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

	   device miibus
	   device bge

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

	   if_bge_load="YES"

DESCRIPTION
     The bge driver provides support for various NICs based on the Broadcom
     BCM570x, 571x, 572x, 575x,	576x, 578x, 5776x and 5778x Gigabit Ethernet
     controller	chips and the 590x and 5779x Fast Ethernet controller chips.

     All of these NICs are capable of 10, 100 and 1000Mbps speeds over CAT5
     copper 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 compliant.	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	inter-
     face) and GMII transceivers, which	means it can be	used with either cop-
     per or 1000baseX fiber applications.  Note	however	the device only	sup-
     ports 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 BCM5700, BCM5701, BCM5702, BCM5703, BCM5704 and BCM5717 also support
     jumbo frames, which can be	configured via the interface MTU setting.
     Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility con-
     figures 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.

     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	fol-
     lowing:

     +o	 3Com 3c996-SX (1000baseSX)
     +o	 3Com 3c996-T (10/100/1000baseTX)
     +o	 Dell PowerEdge	1750 integrated	BCM5704C NIC (10/100/1000baseTX)
     +o	 Dell PowerEdge	2550 integrated	BCM5700	NIC (10/100/1000baseTX)
     +o	 Dell PowerEdge	2650 integrated	BCM5703	NIC (10/100/1000baseTX)
     +o	 IBM x235 server integrated BCM5703x NIC (10/100/1000baseTX)
     +o	 HP Compaq dc7600 integrated BCM5752 NIC (10/100/1000baseTX)
     +o	 HP ProLiant NC7760 embedded Gigabit NIC (10/100/1000baseTX)
     +o	 HP ProLiant NC7770 PCI-X Gigabit NIC (10/100/1000baseTX)
     +o	 HP ProLiant NC7771 PCI-X Gigabit NIC (10/100/1000baseTX)
     +o	 HP ProLiant NC7781 embedded PCI-X Gigabit NIC (10/100/1000baseTX)
     +o	 Netgear GA302T	(10/100/1000baseTX)
     +o	 SysKonnect SK-9D21 (10/100/1000baseTX)
     +o	 SysKonnect SK-9D41 (1000baseSX)

LOADER TUNABLES
     The following tunable can be set at the loader(8) prompt before booting
     the kernel, or stored in loader.conf(5).

     hw.bge.allow_asf
	     Allow the ASF feature for cooperating with	IPMI.  Can cause sys-
	     tem lockup	problems on a small number of systems.	Disabled by
	     default.

SYSCTL VARIABLES
     The following variables are available as both sysctl(8) variables and
     loader(8) tunables:

     dev.bge.%d.forced_collapse
	     Allow collapsing multiple transmit	buffers	into a single buffer
	     to	increase transmit performance with the cost of CPU cycles.
	     The default value is 0 to disable transmit	buffer collapsing.

     dev.bge.%d.forced_udpcsum
	     Enable UDP	transmit checksum offloading even if controller	can
	     generate UDP datagrams with checksum value	0.  UDP	datagrams with
	     checksum value 0 can confuse receiver host	as it means sender did
	     not compute UDP checksum.	The default value is 0 which disables
	     UDP transmit checksum offloading.	The interface need to be
	     brought down and up again before a	change takes effect.

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 net-
     work, 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)

HISTORY
     The bge device driver first appeared in FreeBSD 4.5.

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

FreeBSD	9.2		       November	23, 2010		   FreeBSD 9.2

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | LOADER TUNABLES | SYSCTL VARIABLES | DIAGNOSTICS | SEE ALSO | HISTORY | AUTHORS

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