Marvell YukonII Status Update?

[Nikolas Britton]

On 7/1/06, Pyun YongHyeon <pyunyh at gmail.com> wrote:
> On Fri, Jun 30, 2006 at 11:39:14PM -0500, Nikolas Britton wrote:
>  > On 6/30/06, Pyun YongHyeon <pyunyh at gmail.com> wrote:
>  > >On Thu, Jun 29, 2006 at 10:53:52PM -0500, Nikolas Britton wrote:
>  > > > Anyone know what's going on with YukonII support in FreeBSD,
>  > > > specifically the Marvell chips used in PCI-Express add-on cards?
>  > > >
>  > > > Last I checked somebody was developing an experimental driver and
>  > > > Marvell had just released the code to their FreeBSD 5.x/6.x driver:
>  > > > mykbsd60x86-8.12.2.3.tar (bindary kmod package)
>  > > > mykbsd60x86-8.12.1.3-src.tgz (source code)
>  > > >
>  > >
>  > >I don't know current status of the driver. ATM FreeBSD YukonII
>  > >driver has stability issues and the driver needs big cleanups
>  > >if we import the driver into src tree. But I wouldn't do the
>  > >job and I'll spend my spare time to other thing.
>  > >I know, from my previous experience(sk(4), stge(4)), how
>  > >difficult to write a driver without a document and how hard to
>  > >write a correct driver without knowing hardware internals. I'm
>  > >sure there are many developers eager to write YukonII driver if
>  > >they can access the hardware documentation. However I think there
>  > >is no possibility that Marvell releases their chip documentations.
>  > >
>  >
>  > Marvell will give you the docs if you sign an NDA, I know it's stupid
>  > but I think it's the only way... unless we vote with the wallet... Who
>  > has PCI-Express gigabit NIC cards that meet the following criteria?:
>  >
>  > a) Supported by FreeBSD.
>  > b) Unencumbered documentation.
>  > c) Checksum offloading.
>  >
>
> There are many PCIe GigE hardwares upported by em(4) or bge/bce(4).
> AFAIK the only hardware features not supported by em(4)/bge(4) driver
> is TSO. And hardwares supported by em(4) also have a capability to
> offload IPv6 checksumming too but it's not yet supported by the driver.
>

Will TCP Segmentation Offloading help if you already use a 9000 byte
mtu, and is it going to be supported, someday, with em(4)/bge(4)?...
I'm mostly clueless about TSO.



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