Re: zero-copy TCP

From: Jes Sorensen (
Date: Sun Sep 03 2000 - 09:37:06 EST

>>>>> "Andrew" == Andrew Morton <> writes:

Andrew> Jes Sorensen wrote:
>> I only know of a few 100baseT cards that can do it such as the
>> Adaptec Starfire and the 3C905B (though I am not sure what it
>> provides is sufficient).

Andrew> The 3c905, 3c905B, 3c905C and all 3Com Cardbus NICs will do
Andrew> scatter and gather of up to 63 fragments per packet with
Andrew> byte-granular fragment alignment and length.

Andrew> All of them except the 3c905 provide hardware Rx and Tx
Andrew> checksumming of IP, TCP and UDP headers. No 64 bit addressing
Andrew> support.

Read what I wrote above, the 905B was on the list I posted ;-) The
905B is not a 1995 card on the other hand. The 905 doesn't count since
scatter/gather without checksumming makes it pretty useless.

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