On Mon, Jun 6, 2011 at 10:20 PM, Roedel, Joerg <Joerg.Roedel@xxxxxxx> wrote: > Well, it certainly makes sense to have a single implementation for this. > But I want to hide this complexity to the user of the IOMMU-API. The > best choice is to put this into the layer between the IOMMU-API and the > backend implementation. I agree. The IOMMU API should take physically contiguous regions from the user, split them up according to page-sizes (/alignment requirements) supported by the hardware, and then tell the underlying implementation what to map where. > That interface is not put into stone. There were other complains about > the ->unmap part recently, so there is certainly room for improvement > there. Once the supported page sizes are exposed to the framework, the current ->unmap API should probably be enough. 'va' + 'order' sounds like all the information an implementation needs to unmap a page. -- 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
