Marvell/SysKonnect YukonII source code available
pyunyh at gmail.com
Tue Jan 24 17:56:33 PST 2006
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:
> 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
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
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.
More information about the freebsd-current