Messages in this thread | | | Subject | Re: [PATCH 5/8] powerpc: override dma_get_required_mask by platform hook and ops | From | Benjamin Herrenschmidt <> | Date | Thu, 19 May 2011 17:43:56 +1000 |
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On Wed, 2011-05-11 at 15:25 -0700, Nishanth Aravamudan wrote: > From: Milton Miller <miltonm@bga.com> > > The hook dma_get_required_mask is supposed to return the mask required > by the platform to operate efficently. The generic version of > dma_get_required_mask in driver/base/platform.c returns a mask based > only on max_pfn. However, this is likely too big for iommu systems > and could be too small for platforms that require a dma offset or have > a secondary window at a high offset.
The result of those 3 patches doesn't build on top of my current tree, the generic dma_ops lacks the dma_get_required_mask hook. I'll have a look again after the merge window.
Cheers, Ben.
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