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TI(4)			     Kernel Interfaces Manual			   TI(4)

NAME
     ti -- Alteon Networks Tigon I and Tigon II gigabit ethernet driver

SYNOPSIS
     device ti

DESCRIPTION
     The  ti  driver provides support for PCI gigabit ethernet adapters based on
     the Alteon Networks Tigon gigabit ethernet controller chip.  The Tigon con-
     tains an embedded R4000 CPU, gigabit MAC, dual DMA channels and a	PCI  in-
     terface  unit.  The Tigon II contains two R4000 CPUs and other refinements.
     Either chip can be used in either a 32-bit or 64-bit PCI slot.   Communica-
     tion  with  the  chip is achieved via PCI shared memory and bus master DMA.
     The Tigon I and II support hardware multicast address filtering,  VLAN  tag
     extraction and insertion, and jumbo ethernet frames sizes up to 9000 bytes.
     Note  that  the  Tigon I chipset is no longer in active production: all new
     adapters should come equipped with Tigon II chipsets.

     There are several PCI boards available from both Alteon and  other  vendors
     that  use	the  Tigon  chipset  under OEM contract.  The ti driver has been
     tested with the following Tigon-based adapters:

	   *   The Alteon AceNIC V gigabit ethernet adapter (1000baseSX)
	   *   The Alteon AceNIC V gigabit ethernet adapter (1000baseT)
	   *   The 3Com 3c985-SX gigabit ethernet adapter (Tigon 1)
	   *   The 3Com 3c985B-SX gigabit ethernet adapter (Tigon 2)
	   *   The Netgear GA620 gigabit ethernet adapter (1000baseSX)
	   *   The Netgear GA620T gigabit ethernet adapter (1000baseT)

     The following should also be supported but have not yet been tested:

	   *   The Digital EtherWORKS 1000SX PCI Gigabit Adapter
	   *   Silicon Graphics PCI gigabit ethernet adapter
	   *   Farallon PN9000SX Gigabit Ethernet adapter

     While the Tigon chipset supports 10, 100 and 1000Mbps speeds,  support  for
     10  and  100Mbps  speeds is only available on boards with the proper trans-
     ceivers.  Most adapters are only designed to work at 1000Mbps, however  the
     driver should support those NICs that work at lower speeds as well.

     Support  for  jumbo  frames is provided via the interface MTU setting.  Se-
     lecting an MTU larger than 1500 bytes with the ifconfig(8) utility  config-
     ures  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.

     Support  for  vlans is also available using the vlan(4) mechanism.  See the
     vlan(4) man page for more details.

     The ti 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 the /etc/rc.conf file.

     10baseT/UTP	   Set 10Mbps operation.  The mediaopt option  can  also
			   be  used  to select either full-duplex or half-duplex
			   modes.

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

     1000baseSX 	   Set 1000Mbps (gigabit ethernet) operation.  Only full
			   full-duplex mode is supported at this speed.

     The ti 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).

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

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

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

     ti%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-mas-
     ter slot.

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

     ti%d: bios thinks we're in a 64 bit slot, but we aren't  The BIOS has  pro-
     grammed  the  NIC as though it had been installed in a 64-bit PCI slot, but
     in fact the NIC is in a 32-bit slot.  This happens as a result of a bug  in
     some BIOSes.  This can be worked around on the Tigon II, but on the Tigon I
     initialization will fail.

     ti%d: board self-diagnostics failed!  The ROMFAIL bit in the CPU state reg-
     ister  was set after system startup, indicating that the on-board NIC diag-
     nostics failed.

     ti%d: unknown hwrev  The driver detected a board with an unsupported  hard-
     ware  revision.  The ti driver supports revision 4 (Tigon 1) and revision 6
     (Tigon 2) chips and has firmware only for those devices.

     ti%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), netintro(4), ng_ether(4), vlan(4), ifconfig(8)

     Alteon	Gigabit    Ethernet/PCI    NIC	  manuals,    http://sanjose.al-
     teon.com/open.shtml.

HISTORY
     The ti device driver first appeared in FreeBSD 3.0.

AUTHORS
     The ti driver was written by Bill Paul <wpaul@bsdi.com>.

FreeBSD 4.7			  March 4, 1999 			   TI(4)
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