On Thu, Apr 24, 2014 at 10:30 AM, Santosh Shilimkar
wrote:
> On few architectures, there are few restrictions on DMAble area of system
> RAM. That also means that devices needs to know about this restrictions so
> that the dma_masks can be updated accordingly and dma address translation
> helpers
On few architectures, there are few restrictions on DMAble area of system
RAM. That also means that devices needs to know about this restrictions so
that the dma_masks can be updated accordingly and dma address translation
helpers can add/subtract the dma offset.
In most of cases DMA addresses can
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