On 2022-01-11 3:57 p.m., Jason Gunthorpe wrote: > On Tue, Jan 11, 2022 at 03:09:13PM -0700, Logan Gunthorpe wrote: > >> Either that, or we need a wrapper that allocates an appropriately >> sized SGL to pass to any dma_map implementation that doesn't support >> the new structures. > > This is what I think we should do. If we start with RDMA then we can > motivate the 4 main server IOMMU drivers to get updated ASAP, then it > can acceptably start to spread to other users. I suspect the preferred path forward is for the IOMMU drivers that don't use dma-iommu should be converted to use it. Then anything we do to dma-iommu will be applicable to the IOMMU drivers. Better than expecting them to implement a bunch of new functionality themselves. Logan
