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Subject: Re: virt_to_bus and DMA
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Manish Joshi <mjoshi_blr@yahoo.com>
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> 
> 
> Am I also correct in saying the "standard DMA API" (request_dma, 
> set_dma_addr etc) is NOT available on the 4xx?

The standard DMA mapping API is: dma_map_* and that's what you should be
using.

At one point, virt_to_bus() will be removed and use of __pa in drivers
is highly discouraged.

Ben.