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

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Message-ID: <49F707FA.7070603@freescale.com>
Date:	Tue, 28 Apr 2009 08:43:22 -0500
From:	Timur Tabi <timur@...escale.com>
To:	David Hawkins <dwh@...o.caltech.edu>
CC:	Liu Dave-R63238 <DaveLiu@...escale.com>, linuxppc-dev@...abs.org,
	Dan Williams <dan.j.williams@...el.com>,
	linux-kernel@...r.kernel.org, Ira Snyder <iws@...o.caltech.edu>
Subject: Re: [PATCH] fsldma: use PCI Read Multiple command

David Hawkins wrote:
>> How about FIFO RAM case?
> 
> If the FIFO has a fixed address, then according to
> the user guide, the DMA controller won't generate
> a burst transaction to it.
> 
> We can try confirming this if you'd like.

Like I said earlier, this driver does not support copying data to/from a
single register address.  It's just a off-loaded memcpy.  So we don't
need to worry about what happens to a fixed address.

-- 
Timur Tabi
Linux kernel developer at Freescale
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