Pyun YongHyeon wrote:
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?
If you are willing and able to sign a NDA for the 'physical' docs
I think so. Using the obtained knowledge in a driver is not longer
a problem as pretty much all of the information is available in the
BSD licensed OSS driver too. It's just a bit harder to digest w/o
the documentation. Ie. now that the driver is OSS there are no more
trade secrets in the chip.
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. :-(
Likely.
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.
Yes, they haven't spent all the time to get up-to-date with FreeBSD.
It seems most of their time is spent on OSX and Solaris drivers for
new wired and wireless chips.
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
What's the differences to our current sk(4)?
--
Andre
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