From mboxrd@z Thu Jan  1 00:00:00 1970
Sender: Peter Korsgaard <jacmet@gmail.com>
From: Peter Korsgaard <jacmet@sunsite.dk>
To: Hong Xu <hong.xu@atmel.com>
Subject: Re: [PATCH] MTD: atmel_nand: Add DMA support to access Nandflash
References: <1294997687-12515-1-git-send-email-hong.xu@atmel.com>
Date: Fri, 14 Jan 2011 12:43:52 +0100
In-Reply-To: <1294997687-12515-1-git-send-email-hong.xu@atmel.com> (Hong Xu's
	message of "Fri, 14 Jan 2011 17:34:47 +0800")
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>>>>> "Hong" == Hong Xu <hong.xu@atmel.com> writes:

 Hong> Some SAM9 chips have the ability to perform DMA between CPU and
 Hong> SMC controller.  This patch adds DMA support for SAM9RL, SAM9G45,
 Hong> SSAM9G46,AM9M10, SAM9M11.

 Hong> Signed-off-by: Hong Xu <hong.xu@atmel.com>

But mtd buffers are not guaranteed to be DMA safe (E.G. might come from
vmalloc), so you'll need to walk the page tables.

-- 
Bye, Peter Korsgaard