On 30.06.2025 15:38, Christoph Hellwig wrote: > On Fri, Jun 27, 2025 at 08:02:13PM +0300, Leon Romanovsky wrote: >>> Thanks for this rework! I assume that the next step is to add map_phys >>> callback also to the dma_map_ops and teach various dma-mapping providers >>> to use it to avoid more phys-to-page-to-phys conversions. >> Probably Christoph will say yes, however I personally don't see any >> benefit in this. Maybe I wrong here, but all existing .map_page() >> implementation platforms don't support p2p anyway. They won't benefit >> from this such conversion. > I think that conversion should eventually happen, and rather sooner than > later.
Agreed. Applied patches 1-7 to my dma-mapping-next branch. Let me know if one needs a stable branch with it. Leon, it would be great if You could also prepare an incremental patch adding map_phys callback to the dma_maps_ops, so the individual arch-specific dma-mapping providers can be then converted (or simplified in many cases) too. Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland
