[PATCH 22/33] virtio_net: xsk: introduce xsk disable
From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Date: 2023-02-02 11:02:04
Also in:
bpf, virtualization
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Introduce virtnet_xsk_pool_disable() for xsk unbind. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/net/virtio/xsk.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)
diff --git a/drivers/net/virtio/xsk.c b/drivers/net/virtio/xsk.c
index a7e8005233d2..18c0c6e4d501 100644
--- a/drivers/net/virtio/xsk.c
+++ b/drivers/net/virtio/xsk.c@@ -113,3 +113,32 @@ static int virtnet_xsk_pool_enable(struct net_device *dev, DMA_TO_DEVICE); return err; } + +static int virtnet_xsk_pool_disable(struct net_device *dev, u16 qid) +{ + struct virtnet_info *vi = netdev_priv(dev); + struct receive_queue *rq; + struct send_queue *sq; + int err1, err2; + + if (qid >= vi->curr_queue_pairs) + return -EINVAL; + + sq = &vi->sq[qid]; + rq = &vi->rq[qid]; + + virtio_dma_unmap(&vi->vdev->dev, sq->xsk.hdr_dma_address, vi->hdr_len, + DMA_TO_DEVICE); + + xsk_pool_dma_unmap(sq->xsk.pool, 0); + + rcu_assign_pointer(sq->xsk.pool, NULL); + + /* Sync with the XSK wakeup and with NAPI. */ + synchronize_net(); + + err1 = virtnet_tx_reset(vi, sq); + err2 = virtnet_rq_bind_xsk_pool(vi, rq, NULL, NULL); + + return err1 | err2; +}
--
2.32.0.3.g01195cf9f