Re: Marvell/SysKonnect YukonII source code available

On Tue, Jan 24, 2006 at 11:19:05AM +0100, Andre Oppermann wrote:
 > Marvell/SysKonnect made the source code to the YukonII chips available
 > today under a BSD license:
 > 
 >  http://people.freebsd.org/~andre/mykbsd60x86-8.12.1.3-src.tgz
 > 
 > I haven't tested the driver yet and I don't know if it available directly
 > from the their website already.
 > 
 > Many thanks to Gerald and Frank at SysKonnect for working with us and
 > making this possible!
 > 
Yes, that's great news.

Is there any chance to get a copy of data sheet for Yukon chips?
I've tried hard to make Rx TCP/UDP checksum offload work but
failed. ATM both Linux and OpenBSD use Rx IP checksum offload only
but this driver enabled Rx checksum offload for TCP/UDP. So I guess
there is somthing not listed in SK-NET Genesis data sheet. :-(

Quick reading the source shows that this driver has the following
issues.
1. Incomplete bus_dma(9) support. The driver uses BUS_SPACE_MAXADDR
   when it creates DMA tags which means its DMA supports any address
   without limitations. However, I'm sure Rx/Tx descriptors should
   reside in < 4GB. So the driver wouldn't work on systems with > 4GB
   memory.
2. Since the driver makes use of mbpool(9) it wouldn't work when
   bounce buffers are involved. In fact, I think the use of mbpool(9)
   is really bad as it lacks bus_dmamap_sync(9) operation.
3. Lack of ALTQ support.
4. The driver may not work on big-endian architectures.
5. The driver may not work on architectures with strict-alignment.  

Btw, new sk(4) is availabe at the following URL. Due to lack of
documentation it doesn't support YukonII yet.
http://people.freebsd.org/~yongari/sk/if_sk.c
http://people.freebsd.org/~yongari/sk/if_skreg.h

-- 
Regards,
Pyun YongHyeon