Messages in this thread | | | Date | Mon, 29 Oct 2007 19:52:43 +0000 (GMT) | From | Dave Airlie <> | Subject | Re: [RFC] AGP initial support for chipset flushing.. |
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> > In this case, we're performing basically a dma_sync*(...DMA_TO_DEVICE) > right? Can we be sure that a single flush is sufficient? Is there any > window between when we flush and when we start accessing memory with > the device that we could get into more caching trouble?
Not that I can think off, but I don't work for the company who screwed up the coherency :-), and I don't have the docs, so please investigate for me ;-)
> Looks reasonable, I'm not sure we can do much better. The only concern > I have is that allocating some more PCI space like that may end up > clobbering some *other* hidden BIOS mapping, but there's not a whole > lot we can do about that.
Again I'm trying to workaround broken BIOS.. nothing I can do.
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