On Mon, Jan 31, 2011 at 10:53:43PM +0100, Michał Mirosław wrote:

On Mon, Jan 31, 2011 at 08:45:02AM -0800, Stephen Hemminger wrote:

quoted

On Sat, 22 Jan 2011 23:14:14 +0100 (CET)
Michał Mirosław [off-list ref] wrote:

quoted

The hardware might do full HW_CSUM, not just IP_CSUM, but it's not tested
and so not changed here.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>

The skge hardware does not do full HW_CSUM. It looks at the IP header.

Driver code suggests otherwise. Please look at skge_xmit_frame() and TX
descriptor format.

Besides, I'm locally using a patch that makes skge advertise HW_CSUM - TCP
over IPv6 is correctly checksummed in hardware (haven't tried VLANs yet).

IPv4 UDP inside VLAN-tagged packet is also checksummed properly by hardware.
I don't have time now to make a proper HW_CSUM test (with arbitrary header
prepended). If someone has one (or patches?), I'd be glad to use it, though.

Best Regards,
Michał Mirosław