Date: Mon, 16 Jul 2001 15:56:33 -0700 (PDT) From: Richard Hodges <rh@matriplex.com> To: Bill Paul <wpaul@FreeBSD.ORG> Cc: hackers@FreeBSD.ORG Subject: Re: NatSemi DP83820 gigE driver kit for 4.2 and 4.3 Message-ID: <Pine.BSF.4.10.10107161550460.38762-100000@mail.matriplex.com> In-Reply-To: <20010716165722.EA84737B401@hub.freebsd.org>
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On Mon, 16 Jul 2001, Bill Paul wrote:
> They're "okay." The NatSemi chip has one flaw, which is that RX buffers
> must be aligned on a 64-bit boundary. None of the more expensive NICs have
> this restriction.
Go ahead and beat me up if you have to :-) But why is there _any_ issue
with RX buffer alignment? I get some mbufs and set the data pointer to
any point I want, or I get a cluster, which is always on a 2k boundary.
Now TX buffers are a problem - I have to take what I get and just
"deal with it". If both start address and length need to be aligned,
then I'm pretty much screwed - I have to copy...
All the best,
-Richard
-------------------------------------------
Richard Hodges | Matriplex, inc.
Product Manager | 769 Basque Way
rh@matriplex.com | Carson City, NV 89706
775-886-6477 | www.matriplex.com
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