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TI(4) Device Drivers Manual TI(4)

tiAlteon Networks Tigon I and II Gigabit Ethernet device

ti* at pci?
ti* at sbus?

The ti driver provides support for Gigabit Ethernet adapters based on the Alteon Networks Tigon Gigabit Ethernet controller chip, including the following:

The Tigon contains an embedded R4000 CPU, Gigabit MAC, dual DMA channels and a PCI interface 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. Communication with the chip is achieved via PCI shared memory and bus master DMA. SBus cards are also available and use a special bridge chip. The Tigon I and II support hardware multicast address filtering, VLAN tag insertion and stripping, and jumbo frames.

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

The ti driver supports the following media types:

Enable autoselection of the media type and options. The user can manually override the autoselected mode by adding media options to the appropriate hostname.if(5) file.
Set 10Mbps operation The mediaopt option can also be used to select either full-duplex or half-duplex modes.
Set 100Mbps (Fast Ethernet) operation. The mediaopt option can also be used to select either full-duplex or half-duplex modes.
Set 1000Mbps (Gigabit Ethernet) on fiber operation. Only full-duplex mode is supported at this speed.
Set 1000Mbps (Gigabit Ethernet) on copper operation.

The ti driver supports the following media options:

Force full duplex operation
Force half duplex operation

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

Two firmware files are necessary, for Tigon 1 and Tigon 2 devices. These are loaded on demand when the device is attached:


ti0: couldn't map memory
A fatal initialization error has occurred.
ti0: couldn't map interrupt
A fatal initialization error has occurred.
ti0: no memory for softc struct!
The driver failed to allocate memory for per-device instance information during initialization.
ti0: 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.
ti0: no memory for jumbo buffers!
The driver failed to allocate memory for jumbo frames during initialization.
ti0: bios thinks we're in a 64 bit slot, but we aren't
The BIOS has programmed 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.
ti0: board self-diagnostics failed!
The ROMFAIL bit in the CPU state register was set after system startup, indicating that the on-board NIC diagnostics failed.
ti0: unknown hwrev
The driver detected a board with an unsupported hardware revision. The ti driver supports revision 4 (Tigon 1) and revision 6 (Tigon 2) chips and has firmware only for those devices.
ti0: watchdog timeout -- resetting
The device has stopped responding to the network, or there is a problem with the network connection (cable).

arp(4), ifmedia(4), intro(4), netintro(4), pci(4), sbus(4), hostname.if(5), ifconfig(8)

The ti device driver first appeared in FreeBSD 3.0. OpenBSD support first appeared in OpenBSD 2.6. SBus support was added in OpenBSD 4.7.

The ti driver was written by Bill Paul <>. SBus support was added by Mark Kettenis <>.

September 14, 2014 OpenBSD-6.4