Subject: Re: LANCE (Am7990) DMA
To: Matt Thomas <matt@3am-software.com>
From: Jason Thorpe <thorpej@nas.nasa.gov>
List: tech-net
Date: 10/05/1998 21:14:22
On Mon, 05 Oct 1998 21:27:53 -0700 
 Matt Thomas <matt@3am-software.com> wrote:

 > Am I reading the lance code correctly in that none
 > of the le drivers actually do DMA directly to/from 
 > mbufs  but actually have other buffers they DMA with 
 > and then copy to/from mbufs from those buffers?

That's correct... that's the way the driver is currently structured.

Note, that's safest for e.g. ISA-based LANCE boards, as well as any boards
where it can only DMA to on-board memory.

Jason R. Thorpe                                       thorpej@nas.nasa.gov
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