This commit adds driver support for the SysKonnect SK-984x series

gigabit ethernet adapters. This includes two single port cards
(single mode and multimode fiber) and two dual port cards (also single
mode and multimode fiber). SysKonnect is currently the only
vendor with a dual port gigabit ethernet NIC.

The ports on dual port adapters are treated as separate network
interfaces. Thus, if you have an SK-9844 dual port SX card, you
should have both sk0 and sk1 interfaces attached. Dual port cards
are implemented using two XMAC II chips connected to a single
SysKonnect GEnesis controller. Hence, dual port cards are really
one PCI device, as opposed to two separate PCI devices connected
through a PCI to PCI bridge. Note that SysKonnect's drivers use
the two ports for failover purposes rather that as two separate
interfaces, plus they don't support jumbo frames. This applies to
their Linux driver too. :)

Support is provided for hardware multicast filtering, BPF and
jumbo frames. The SysKonnect cards support TCP checksum offload
however this feature is not currently enabled (hopefully it will
be once we get checksum offload support).

There are still a few things that need to be implemeted, like
the ability to communicate with the on-board LM80 voltage/temperature
monitor, but I wanted to get the driver under CVS control and into
-current so people could bang on it.

A big thanks for SysKonnect for making all their programming info
for these cards (and for their FDDI and token ring cards) available
without NDA (see www.syskonnect.com).

1 files changed, 159 insertions, 0 deletions

diff --git a/share/man/man4/sk.4 b/share/man/man4/sk.4
new file mode 100644
index 000000000000..c5535c3c4485
--- /dev/null
+++ b/share/man/man4/sk.4
@@ -0,0 +1,159 @@
+.\" Copyright (c) 1997, 1998, 1999
+.\"	Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by Bill Paul.
+.\" 4. Neither the name of the author nor the names of any co-contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"   without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+.\" THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.\"	$Id$
+.\"
+.Dd July 3, 1999
+.Dt SK 4 i386
+.Os FreeBSD
+.Sh NAME
+.Nm sk
+.Nd
+SysKonnect SK-984x PCI gigabit ethernet adapter driver
+.Sh SYNOPSIS
+.Cd "device sk0"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the SysKonnect SK-984x series PCI
+gigabit ethernet adapters, including the following:
+.Bl -bullet -offset indent
+.It
+SK-9841 SK-NET GE-LX single port, single mode fiber adapter
+.It
+SK-9842 SK-NET GE-SX single port, multimode fiber adapter
+.It
+SK-9843 SK-NET GE-LX dual port, single mode fiber adapter
+.It
+SK-9844 SK-NET GE-SX duak port, multimode fiber adapter
+.El
+.Pp
+The SysKonnect adapters consist of two main components: the XaQti Corp.
+XMAC II gigabit MAC and the SysKonnect GEnesis controller ASIC. The
+XMAC provides the gigabit MAC and PHY suspport while the GEnesis
+provides an interface to the PCI bus, DMA support, packet buffering
+and arbitration. The GEnesis can control up to two XMACs simultaneously,
+allowing dual-port NIC configurations.
+.Pp
+The
+.Nm
+driver configures dual port SysKonnect adapters such that each XMAC
+is treated as a separate logical network interface. Both ports can
+operate indepenently of each other and can be connected to separate
+networks. The SysKonnect driver software currently only uses the
+second port on dual port adapters for failover purposes: if the link
+on the primary port fails, the SysKonnect driver will automatically
+switch traffic onto the second port.
+.Pp
+The XaQti XMAC II supports full and half duplex operation with
+autonegotiation. The XMAC also supports unlimited frame sizes.
+Support for jumbo frames is provided via the interface MTU setting.
+Selecting an MTU larger than 1500 bytes with the
+.Xr ifconfig 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.
+.Pp
+The
+.Nm
+driver supports the following media types:
+.Pp
+.Bl -tag -width xxxxxxxxxxxxxxxxxxxx
+.It autoselect
+Enable autoselection of the media type and options.
+The user can manually override
+the autoselected mode by adding media options to the
+.Pa /etc/rc.conf
+file.
+.It 1000baseSX
+Set 1000Mbps (gigabit ethernet) operation. Both
+.Ar full-duplex
+and
+.Ar half-duplex
+modes are supported.
+.El
+.Pp
+The
+.Nm
+driver supports the following media options:
+.Pp
+.Bl -tag -width xxxxxxxxxxxxxxxxxxxx
+.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 DIAGNOSTICS
+.Bl -diag
+.It "sk%d: couldn't map memory"
+A fatal initialization error has occurred.
+.It "sk%d: couldn't map ports"
+A fatal initialization error has occurred.
+.It "sk%d: couldn't map interrupt"
+A fatal initialization error has occurred.
+.It "sk%d: no memory for softc struct!"
+The driver failed to allocate memory for per-device instance information
+during initialization.
+.It "sk%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.
+.It "sk%d: no memory for jumbo buffers!"
+The driver failed to allocate memory for jumbo frames during
+initialization.
+.It "sk%d: watchdog timeout"
+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 netintro 4 , 
+.Xr ifconfig 8 ,
+.Xr vlan 4
+.Rs
+.%T XaQti XMAC II datasheet
+.%O http://www.xaqti.com
+.Re
+.Rs
+.%T SysKonnect GEnesis programming manual
+.%O http://www.syskonnect.com
+.Re
+.Sh HISTORY
+The
+.Nm
+device driver first appeared in
+.Fx 3.0 .
+.Sh AUTHOR
+The
+.Nm
+driver was written by
+.An Bill Paul Aq wpaul@ctr.columbia.edu .