On Tue, Feb 27, 2024 at 08:17:27AM +0000, Chaitanya Kulkarni wrote: > Hi, > > * Problem Statement :- > ------------------------------------------------------------------------- > The existing IOMMU DMA mapping operation is performed in two steps at the > same time (one-shot): > 1. Allocates IOVA space. > 2. Actually maps DMA pages to that space. > For example, map scatter-gather list: For clarity, this has come out of last years topic on the "physr" - we agreed to a general direction where instead of adding a parallel DMA API surface for a new scatterlist alternative we'd improve the DMA API so callers can efficiently bring their own data structure. https://lore.kernel.org/linux-rdma/Y8v+qVZ8OmodOCQ9@xxxxxxxxxx/ Jason
