[dpdk-dev,4/8] driver/virtio:enqueue TSO offload
Commit Message
Enqueue host TSO4/6 offload in guest side.
Signed-off-by: Jijiang Liu <jijiang.liu@intel.com>
---
drivers/net/virtio/virtio_rxtx.c | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
@@ -198,6 +198,31 @@ virtqueue_enqueue_recv_refill(struct virtqueue *vq, struct rte_mbuf *cookie)
return 0;
}
+static int
+virtqueue_enqueue_offload(struct virtqueue *txvq, struct rte_mbuf *m,
+ uint16_t idx, uint16_t hdr_sz)
+{
+ struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)(uintptr_t)
+ (txvq->virtio_net_hdr_addr + idx * hdr_sz);
+
+ if (m->tso_segsz != 0 && m->ol_flags & PKT_TX_TCP_SEG) {
+ if (m->ol_flags & PKT_TX_IPV4) {
+ if (!vtpci_with_feature(txvq->hw,
+ VIRTIO_NET_F_HOST_TSO4))
+ return -1;
+ hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
+ } else if (m->ol_flags & PKT_TX_IPV6) {
+ if (!vtpci_with_feature(txvq->hw,
+ VIRTIO_NET_F_HOST_TSO6))
+ return -1;
+ hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
+ }
+ hdr->gso_size = m->tso_segsz;
+ hdr->hdr_len = m->l2_len + m->l3_len + m->l4_len;
+ }
+ return 0;
+}
+
static int
virtqueue_enqueue_xmit(struct virtqueue *txvq, struct rte_mbuf *cookie)
{
@@ -221,6 +246,9 @@ virtqueue_enqueue_xmit(struct virtqueue *txvq, struct rte_mbuf *cookie)
dxp->cookie = (void *)cookie;
dxp->ndescs = needed;
+ if (virtqueue_enqueue_offload(txvq, cookie, idx, head_size) < 0)
+ return -EPERM;
+
start_dp = txvq->vq_ring.desc;
start_dp[idx].addr =
txvq->virtio_net_hdr_mem + idx * head_size;