On Tuesday 19 April 2011, Roedel, Joerg wrote: > > Getting back to our video codec - it has 2 IOMMU controllers. The codec > > hardware is able to address only 256MiB of space. Do you have an idea how > > this can be handled with dma-mapping API? The only idea that comes to my > > mind is to provide a second, fake 'struct device' and use it for allocations > > for the second IOMMU controller. > > The GPU IOMMUs can probably be handled in the GPU driver if they are > that different. Recent PCIe GPUs on x86 have their own IOMMUs too which > are very device specific and are handled in the device driver. I tend to disagree with this one, and would suggest that the GPUs should actually provide their own iommu_ops, even if they are the only users of these. However, this is a minor point that we don't need to worry about today. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
