Date: Wed, 25 Jan 2006 10:55:11 +0900 From: Pyun YongHyeon <pyunyh@gmail.com> To: Andre Oppermann <andre@freebsd.org> Cc: current@freebsd.org, net@freebsd.org Subject: Re: Marvell/SysKonnect YukonII source code available Message-ID: <20060125015511.GA11296@rndsoft.co.kr> In-Reply-To: <43D5FF19.7090903@freebsd.org> References: <43D5FF19.7090903@freebsd.org>
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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
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