On Mon, 24 Jul 2023 09:43:42 -0700, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > On Thu, Jul 20, 2023 at 01:21:07PM -0400, Michael S. Tsirkin wrote: > > Well I think we can add wrappers like virtio_dma_sync and so on. > > There are NOP for non-dma so passing the dma device is harmless. > > Yes, please. I am not sure I got this fully. Are you mean this: https://lore.kernel.org/all/20230214072704.126660-8-xuanzhuo@xxxxxxxxxxxxxxxxx/ https://lore.kernel.org/all/20230214072704.126660-9-xuanzhuo@xxxxxxxxxxxxxxxxx/ Then the driver must do dma operation(map and sync) by these virtio_dma_* APIs. No care the device is non-dma device or dma device. Then the AF_XDP must use these virtio_dma_* APIs for virtio device. Thanks
