On Wed, 30 Mar 2022 14:56:17 +0800, Jason Wang <jasowang@xxxxxxxxxx> wrote: > On Wed, Mar 30, 2022 at 2:34 PM Michael S. Tsirkin <mst@xxxxxxxxxx> wrote: > > > > 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. > > I will review them. hi, the core code of premapped, I will merge it into 'virtio pci support VIRTIO_F_RING_RESET' because this function will be used when reusing the buffer after resize. Thanks. > > Thanks > > > > > 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 > > >
