| From: |
| Xuan Zhuo <xuanzhuo-AT-linux.alibaba.com> |
| To: |
| virtualization-AT-lists.linux-foundation.org, netdev-AT-vger.kernel.org |
| Subject: |
| [PATCH v2 0/9] virtio: support advance DMA |
| Date: |
| Thu, 24 Feb 2022 19:03:53 +0800 |
| Message-ID: |
| <20220224110402.108161-1-xuanzhuo@linux.alibaba.com> |
| Cc: |
| "Michael S. Tsirkin" <mst-AT-redhat.com>, Jason Wang <jasowang-AT-redhat.com>, "David S. Miller" <davem-AT-davemloft.net>, Jakub Kicinski <kuba-AT-kernel.org>, Alexei Starovoitov <ast-AT-kernel.org>, Daniel Borkmann <daniel-AT-iogearbox.net>, Jesper Dangaard Brouer <hawk-AT-kernel.org>, John Fastabend <john.fastabend-AT-gmail.com>, bpf-AT-vger.kernel.org |
| Archive-link: |
| Article |
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().
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
