On Fri, Jul 18, 2025 at 10:38 AM Jason Wang <jasowang@xxxxxxxxxx> wrote: > > Hi all: > > Virtio used to be coupled with DMA API. This works fine for the device > that do real DMA but not the others. For example, VDUSE nees to craft > with DMA API in order to let the virtio-vdpa driver to work. > > This series tries to solve this issue by introducing the mapping API > in the virtio core. So transport like vDPA can implement their own > mapping logic without the need to hack with DMA API. The mapping API > are abstracted with a new map operations in order to be re-used by > transprot or device. So device like VDUSE can implement its own > mapping loigc. > > For device that uses DMA (for example PCI device), the virtio core > will still call DMA API directly without the need of implementing map > ops per device/transport. > > Please review. > > Changes since V2: > > - Drop VDUSE dependenct for HAS_DMA and ARCH_HAS_DMA_OPS I just realized V2 has been merged. So I will post an independent patch to do this on top. Thanks
