RFC: TSO patch for current

[Andre Oppermann]

Jack Vogel wrote:
> On 9/5/06, Andre Oppermann <andre at freebsd.org> wrote:
>> > If you do the ifconfig changes there will need to be a small amount of
>> > code added to em_ioctl() but it should be trivial.
>> >
>> > You want me to reissue a driver patch with changes for your code?
>>
>> Yes, please do so.  I've got a dual-em card which I can test with myself.
> 
> OK, attached new patch, this one even has the ioctl change so when
> you get the ifconfig change in it will be ready.

The TSO code is committed.  There has been a slight change with the ifcapabilities
to differentiate between TSO for IPv4 and IPv6 which can be set independently.

The pseudo-header checksum is always provided in m_pkthdr.csum_data, you don't
have to compute it yourself in the driver.

TSO for IPv6 is not yet functional as it is missing the in6_pseudo() function and
some changes to ip6_output().  I have contacted one of our IPv6 gurus to develop
the patches and get it fully functional as well.

-- 
Andre