On Friday 14 March 2014, Santosh Shilimkar wrote: > I remember NAKing this approach in past and my stand remains same. > The cache APIs which you are trying to use here are not suppose > to be used outside. > > I think the right way to fix this is to make use of streaming APIs. > If needed, IOMMU can have its own dma_ops for special case > handling if any. > > Russell, Arnd might have more ideas. I have a bad feeling about using the dma-mapping API within the IOMMU code, because that driver is also used to implement the dma-mapping API for devices attached to the IOMMU. It's possible that it just works. Is the IOMMU actually designed to have page tables in noncoherent memory? I would have expected that the iopt accesses must all be done on dma_alloc_coherent() provided memory to guarantee proper accesses. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
