daf292270b
Yukon Extreme uses new descriptor format for TSO and has Tx frame parser which greatly reduces CPU cycles spent in computing TCP/UDP payload offset calculation in Tx checksum offloading path. The new descriptor format also removed TCP/UDP payload computation for TSO which in turn results in better TSO performance. It seems Yukon Extreme has a lot of new (unknown) features but only basic offloading is supported at this time. So far there are two known issues. o Sometimes Rx overrun errors happen when pulling data over gigabit link. Running over 100Mbps seem to ok. o Ethernet hardware address shows all-zeroed value on 88E8070. Assigning ethernet address with ifconfig is necessary to make it work. Support for Yukon Extreme is not perfect but it would be better than having a non-working device. Special thanks to jbh who fixed several bugs of initial patch. Tested by: jhb, Warren Block ( wblock <> wonkity dot com )
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