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
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.
virtnet_free_old_xmit distinguishes three type ptr(skb, xdp frame, xsk
buffer) by the last bits of the pointer.
Signed-off-by:
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 b570acb
virtio-net rq submits premapped per-buffer by setting sg page to NULL;
Signed-off-by: Xuan Zhuo
---
drivers/net/virtio_net.c | 16
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 6f4781ec2b36..630e5b21ad69 1
Now, we support AF_XDP(xsk). Add NETDEV_XDP_ACT_XSK_ZEROCOPY to
xdp_features.
Signed-off-by: Xuan Zhuo
Acked-by: Jason Wang
---
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 a1ef0277c550..
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 1a870f1df91
The subsequent commit needs to know whether every indirect buffer is
premapped or not. So we need to introduce an extra struct for every
indirect buffer to record this info.
Signed-off-by: Xuan Zhuo
---
drivers/virtio/virtio_ring.c | 67
1 file changed, 37 in
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/
The subsequent commit needs to know whether every indirect buffer is
premapped or not. So we need to introduce an extra struct for every
indirect buffer to record this info.
Signed-off-by: Xuan Zhuo
---
drivers/virtio/virtio_ring.c | 126 +--
1 file changed, 61 in
Because the merge window is closed, so this is RFC.
v1:
1. some small fixes for
http://lore.kernel.org/all/20240820073330.9161-1-xuanz...@linux.alibaba.com
1. fix the title of the commit #2, #3
2. fix the gcc error for commit #3
3. use virtqueue_dma_ for tx hdr
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
This patch implement the logic of bind/unbind xsk pool to sq and rq.
Signed-off-by: Xuan Zhuo
---
drivers/net/virtio_net.c | 53
1 file changed, 53 insertions(+)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 41a5ea9b788d..7c37961
Because the af-xdp will introduce a new xmit type, so I refactor the
xmit type mechanism first.
In general, pointers are aligned to 4 or 8 bytes. If it is aligned to 4
bytes, then only two bits are free for a pointer. But there are 4 types
here, so we can't use bits to distinguish them. And 2 bits
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