On Mar 11, 2005, at 9:19 AM, YAMAMOTO Takashi wrote:

>> OK.  that's reasonable.  I've modified if_wm.c to set ip_len to 0 and
>> now ip_output.c leaves ip_len unchanged.
>
> thanks.
>
>> So when is the support for TSO in re(4) going to be committed? :)
>
> maybe tomorrow.
>
> although it has another problem; IP_MAXPACKET, which is used to limit
> largesend size, seems too large for rtl8169, which has only 64 tx 
> descriptor.
> i guess we need something like NDIS_TASK_TCP_LARGE_SEND.

After pondering this for awhile, I think the solution is even easier.
If you can't fit it into your descriptors, split it up.  That's what
the hardware would do.

copy the ip & hdrs to a new header mbuf, tweak tcp_seq & ip_len
appropriately (maybe ip_id [what do the adapters do for ip_id?] too).


-- 
Matt Thomas                     email: matt@3am-software.com
3am Software Foundry              www: http://3am-software.com/bio/matt/
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