On Thu, Feb 24, 2022 at 07:03:53PM +0800, Xuan Zhuo wrote: > virtqueue_add() only supports virtual addresses, dma is completed in > virtqueue_add(). > > In some scenarios (such as the AF_XDP scenario), DMA is completed in advance, so > it is necessary for us to support passing the DMA address to virtqueue_add(). I picked up a couple of patches. Others are waiting for some acks (Jason?) and improved commit logs for documentation. Thanks! > v2: > 1. rename predma -> premapped > 2. virtio net xdp tx use virtio dma api > > v1: > 1. All sgs requested at one time are required to be unified PREDMA, and several > of them are not supported to be PREDMA > 2. virtio_dma_map() is removed from this patch set and will be submitted > together with the next time AF_XDP supports virtio dma > 3. Added patch #2 #3 to remove the check for flags when performing unmap > indirect desc > > Xuan Zhuo (9): > virtio_ring: rename vring_unmap_state_packed() to > vring_unmap_extra_packed() > virtio_ring: remove flags check for unmap split indirect desc > virtio_ring: remove flags check for unmap packed indirect desc > virtio_ring: virtqueue_add() support premapped > virtio_ring: split: virtqueue_add_split() support premapped > virtio_ring: packed: virtqueue_add_packed() support premapped > virtio_ring: add api virtio_dma_map() for advance dma > virtio_ring: introduce virtqueue_add_outbuf_premapped() > virtio_net: xdp xmit use virtio dma api > > drivers/net/virtio_net.c | 42 +++++- > drivers/virtio/virtio_ring.c | 280 ++++++++++++++++++++++++++--------- > include/linux/virtio.h | 12 ++ > 3 files changed, 254 insertions(+), 80 deletions(-) > > -- > 2.31.0
