[RFC net-next 13/13] virtio_net: xdp_features add NETDEV_XDP_ACT_XSK_ZEROCOPY

Now, we supported AF_XDP(xsk). Add NETDEV_XDP_ACT_XSK_ZEROCOPY to xdp_features. Signed-off-by: Xuan Zhuo --- drivers/net/virtio_net.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 38af9f0b632e..79bfc5231426 100644

[RFC net-next 01/13] virtio_ring: introduce vring_need_unmap_buffer

To make the code readable, introduce vring_need_unmap_buffer() to replace do_unmap. use_dma_api premapped -> vring_need_unmap_buffer() 1. false falsefalse 2. truefalsetrue 3. truetrue false Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drive

[RFC net-next 09/13] virtio_net: xsk: prevent disable tx napi

Since xsk's TX queue is consumed by TX NAPI, if sq is bound to xsk, then we must stop tx napi from being disabled. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/net/virtio_net.c | 10 +- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/virtio_net.c b/

[RFC net-next 07/13] virtio_net: refactor the xmit type

Because the af-xdp will introduce a new xmit type, so I refactor the xmit type mechanism first. We use the last two bits of the pointer to distinguish the xmit type, so we can distinguish four xmit types. Now we have three types: skb, orphan and xdp. Signed-off-by: Xuan Zhuo --- drivers/net/vir

[RFC net-next 06/13] virtio_ring: remove API virtqueue_set_dma_premapped

Now, this API is useless. remove it. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 48 include/linux/virtio.h | 2 -- 2 files changed, 50 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index d357f1b

[RFC net-next 05/13] virtio-net: rq submits premapped buffer per buffer

virtio-net rq submits premapped buffer per buffer. And removes the call of the virtnet_rq_set_premapped(). Signed-off-by: Xuan Zhuo --- drivers/net/virtio_net.c | 31 --- 1 file changed, 8 insertions(+), 23 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers

[RFC net-next 12/13] virtio_net: update tx timeout record

If send queue sent some packets, we update the tx timeout record to prevent the tx timeout. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/net/virtio_net.c | 7 +++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 700d080d8c5

[RFC net-next 11/13] virtio_net: xsk: tx: handle the transmitted xsk buffer

virtnet_free_old_xmit distinguishes three type ptr(skb, xdp frame, xsk buffer) by the last bits of the pointer. Signed-off-by: Xuan Zhuo --- drivers/net/virtio_net.c | 85 1 file changed, 59 insertions(+), 26 deletions(-) diff --git a/drivers/net/virtio_

[RFC net-next 10/13] virtio_net: xsk: tx: support xmit xsk buffer

The driver's tx napi is very important for XSK. It is responsible for obtaining data from the XSK queue and sending it out. At the beginning, we need to trigger tx napi. Signed-off-by: Xuan Zhuo --- drivers/net/virtio_net.c | 127 ++- 1 file changed, 125 inse

[RFC net-next 02/13] virtio_ring: split: harden dma unmap for indirect

1. this commit hardens dma unmap for indirect 2. the subsequent commit uses the struct extra to record whether the buffers need to be unmapped or not. So we need a struct extra for every desc, whatever it is indirect or not. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 122 +

[RFC net-next 04/13] virtio_ring: perform premapped operations based on per-buffer

The current configuration sets the virtqueue (vq) to premapped mode, implying that all buffers submitted to this queue must be mapped ahead of time. This presents a challenge for the virtnet send queue (sq): the virtnet driver would be required to keep track of dma information for vq size * 17, whi

[RFC net-next 03/13] virtio_ring: packed: harden dma unmap for indirect

1. this commit hardens dma unmap for indirect 2. the subsequent commit uses the struct extra to record whether the buffers need to be unmapped or not. So we need a struct extra for every desc, whatever it is indirect or not. Signed-off-by: Xuan Zhuo --- drivers/virtio/virtio_ring.c | 57 ++

[RFC net-next 08/13] virtio_net: xsk: bind/unbind xsk for tx

This patch implement the logic of bind/unbind xsk pool to sq and rq. Signed-off-by: Xuan Zhuo --- drivers/net/virtio_net.c | 54 1 file changed, 54 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index f5edd8be4668..c0aba5d

[RFC net-next 00/13] virtio-net: support AF_XDP zero copy (tx)

## AF_XDP XDP socket(AF_XDP) is an excellent bypass kernel network framework. The zero copy feature of xsk (XDP socket) needs to be supported by the driver. The performance of zero copy is very good. mlx5 and intel ixgbe already support this feature, This patch set allows virtio-net to support xsk