Subject: Re: BUS_DMA_CONTROLDATA flag for bus_dma(9)
To: Eduardo Horvath <eeh@NetBSD.ORG>
From: Allen Briggs <briggs@wasabisystems.com>
List: tech-kern
Date: 08/15/2003 18:12:19
On Fri, Aug 15, 2003 at 09:30:24PM +0000, Eduardo Horvath wrote:
> Does this mean we can finally get rid of that BUS_DMA_STREAMING
> flag?
No. I don't think so. BUS_DMA_COHERENT is for CPU <-> memory
coherency where BUS_DMA_STREAMING is for controlling device <->
memory coherency in certain cases that I know about only from
the man page. I don't see how that's changed at all.
-allen
--
Allen Briggs briggs@wasabisystems.com
Wasabi Systems, Inc. http://www.wasabisystems.com/