On Tue, Jul 25, 2023 at 10:13:48AM +0800, Xuan Zhuo wrote: > 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. yes > Then the AF_XDP must use these virtio_dma_* APIs for virtio device. We'll worry about AF_XDP when the patch is posted. -- MST
