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attempt to standardise the way we specify speeds in our name description (Nd)
lines;

sthen and deraadt argued for unit suffixes for speeds 1Gb+
deraadt also requested Gigabit be standardised to 1Gb

ok sthen deraadt ian benno

.\"	$OpenBSD: ti.4,v 1.45 2021/09/08 20:29:21 jmc Exp $
.\"
.\" Copyright (c) 1997, 1998, 1999
.\"	Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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.\"	$FreeBSD: src/share/man/man4/ti.4,v 1.11 2000/08/10 19:47:32 billf Exp $
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.Dd $Mdocdate: September 8 2021 $
.Dt TI 4
.Os
.Sh NAME
.Nm ti
.Nd Alteon Networks Tigon I and II 1Gb Ethernet device
.Sh SYNOPSIS
.Cd "ti* at pci?"
.Cd "ti* at sbus?"
.Sh DESCRIPTION
The
.Nm
driver provides support for Gigabit Ethernet adapters based on the
Alteon Networks Tigon Gigabit Ethernet controller chip, including
the following:
.Pp
.Bl -bullet -compact -offset indent
.It
3Com 3C985-SX Gigabit Ethernet (1000baseSX)
.It
3Com 3C985B-SX Gigabit Ethernet (1000baseSX)
.It
Alteon AceNIC V Gigabit Ethernet (1000baseSX)
.It
Alteon AceNIC V Gigabit Ethernet (1000baseT)
.It
Digital EtherWORKS 1000SX PCI Gigabit Ethernet (1000baseSX)
.It
Farallon PN9000SX Gigabit Ethernet (1000baseSX)
.It
Netgear GA620 Gigabit Ethernet (1000baseSX)
.It
Netgear GA620T Gigabit Ethernet (1000baseT)
.It
Silicon Graphics Gigabit Ethernet (1000baseSX)
.It
Silicon Graphics Gigabit Ethernet (1000baseT)
.It
Sun Vector Gigabit Ethernet (1000baseSX)
.El
.Pp
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.
.Pp
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.
.Pp
The
.Nm
driver supports the following media types:
.Bl -tag -width full-duplex
.It autoselect
Enable autoselection of the media type and options.
The user can manually override
the autoselected mode by adding media options to the appropriate
.Xr hostname.if 5
file.
.It 10baseT
Set 10Mbps operation
The
.Ar mediaopt
option can also be used to select either
.Ar full-duplex
or
.Ar half-duplex
modes.
.It 100baseTX
Set 100Mbps (Fast Ethernet) operation.
The
.Ar mediaopt
option can also be used to select either
.Ar full-duplex
or
.Ar half-duplex
modes.
.It 1000baseSX
Set 1000Mbps (Gigabit Ethernet) on fiber operation.
Only
.Ar full-duplex
mode is supported at this speed.
.It 1000baseT
Set 1000Mbps (Gigabit Ethernet) on copper operation.
.El
.Pp
The
.Nm
driver supports the following media options:
.Bl -tag -width full-duplex
.It full-duplex
Force full duplex operation
.It half-duplex
Force half duplex operation
.El
.Pp
For more information on configuring this device, see
.Xr ifconfig 8 .
.Sh FILES
Two firmware files are necessary, for Tigon 1 and Tigon 2 devices.
These are loaded on demand
when the device is attached:
.Pp
.Bl -tag -width Ds -offset indent -compact
.It Pa /etc/firmware/tigon1
.It Pa /etc/firmware/tigon2
.El
.Sh DIAGNOSTICS
.Bl -diag
.It "ti0: couldn't map memory"
A fatal initialization error has occurred.
.It "ti0: couldn't map interrupt"
A fatal initialization error has occurred.
.It "ti0: no memory for softc struct!"
The driver failed to allocate memory for per-device instance information
during initialization.
.It "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.
.It "ti0: no memory for jumbo buffers!"
The driver failed to allocate memory for jumbo frames during
initialization.
.It "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.
.It "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.
.It "ti0: unknown hwrev"
The driver detected a board with an unsupported hardware revision.
The
.Nm
driver supports revision 4 (Tigon 1) and revision 6 (Tigon 2) chips
and has firmware only for those devices.
.It "ti0: watchdog timeout -- resetting"
The device has stopped responding to the network, or there is a problem with
the network connection (cable).
.El
.Sh SEE ALSO
.Xr arp 4 ,
.Xr ifmedia 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr pci 4 ,
.Xr sbus 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Sh HISTORY
The
.Nm
device driver first appeared in
.Fx 3.0 .
.Ox
support first appeared in
.Ox 2.6 .
SBus support was added in
.Ox 4.7 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Bill Paul Aq Mt wpaul@bsdi.com .
SBus support was added by
.An Mark Kettenis Aq Mt kettenis@openbsd.org .