Date: Tue, 18 May 2010 10:13:15 -0700 From: Pyun YongHyeon <pyunyh@gmail.com> To: "Bjoern A. Zeeb" <bz@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Pyun YongHyeon <yongari@freebsd.org> Subject: Re: svn commit: r207851 - head/sys/dev/sge Message-ID: <20100518171315.GA5968@michelle.cdnetworks.com> In-Reply-To: <20100518032628.S23815@maildrop.int.zabbadoz.net> References: <201005101714.o4AHEFuu015079@svn.freebsd.org> <20100518032628.S23815@maildrop.int.zabbadoz.net>
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On Tue, May 18, 2010 at 03:27:33AM +0000, Bjoern A. Zeeb wrote: > On Mon, 10 May 2010, Pyun YongHyeon wrote: > > >Author: yongari > >Date: Mon May 10 17:14:14 2010 > >New Revision: 207851 > >URL: http://svn.freebsd.org/changeset/base/207851 > > > >Log: > > Implement TSO and TSO over VLAN. Increase number of allowed > > fragmentation of mbuf chain to 32 from 16 because TSO can send 64KB > > sized packet which in turn requires long list of mbuf chain. Due to > > lack of documentation, I'm not sure whether driver have to pull up > > ethernet/IP/TCP header with options to make controller work but > > driver have to parse TCP header to update pseudo TCP checksum > > anyway. The controller expects pseudo TCP checksum computed by > > upper stack and the checksum should follow the MS NDIS > > specification to make TSO work. > > > > Tested by: xclin <xclin <> cs dot nctu dot edu dot tw > > > This brings in INET as a dependency for the driver and fails on my > nooptions INET > nooptions INET6 > kernels (in_pseudo()). > AFAIK sge(4) is not the only driver that has INET dependency. I think we need IPv6 offloading framework(checksum offloading, TSO4 and TSO6) before removing INET dependency in various drivers. Most recent ethernet controllers support IPv6 offloading and FreeBSD still lacks these nice features. > /bz > > -- > Bjoern A. Zeeb (from 21) Micky Rosa: > But as we've all said, this game is about the past and the future, > and tonight we forget about the past. We just focus on the future.
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