linux-kernel - Re: [PATCH] fsldma: use PCI Read Multiple command

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Message-Id: <46B638E2-885C-4281-81EA-CB685264E143@kernel.crashing.org>
Date:	Mon, 27 Apr 2009 14:54:22 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	David Hawkins <dwh@...o.caltech.edu>
Cc:	Timur Tabi <timur@...escale.com>, linuxppc-dev@...abs.org,
	Dan Williams <dan.j.williams@...el.com>,
	Liu Dave-R63238 <DaveLiu@...escale.com>,
	linux-kernel@...r.kernel.org, Ira Snyder <iws@...o.caltech.edu>
Subject: Re: [PATCH] fsldma: use PCI Read Multiple command


On Apr 27, 2009, at 2:48 PM, David Hawkins wrote:

> Can you give me an example of non-PCI memory that would be
> non-prefetchable that you'd like us to try? We can see if our
> host CPUs have an area like that ... we just need to know
> what device to look for first :)

You can mark the pci inbound window on the 83xx as non-prefetchable  
(assuming 83xx is host). On a x86 host I doubt there is any easy way  
to get non-prefetchable memory.

- k
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