[dpdk-dev] [RFC PATCH 4/8] driver/virtio:enqueue TSO offload

[Jijiang Liu]

Enqueue TSO4/6 offload.

Signed-off-by: Jijiang Liu <jijiang.liu at intel.com>
---
 drivers/net/virtio/virtio_rxtx.c |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index c5b53bb..4c2d838 100644
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -198,6 +198,28 @@ virtqueue_enqueue_recv_refill(struct virtqueue *vq, struct 
rte_mbuf *cookie)
        return 0;
 }

+static void
+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;
+                       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;
+                       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;
+       }
+}
+
 static int
 virtqueue_enqueue_xmit(struct virtqueue *txvq, struct rte_mbuf *cookie)
 {
@@ -221,6 +243,7 @@ virtqueue_enqueue_xmit(struct virtqueue *txvq, struct 
rte_mbuf *cookie)
        dxp->cookie = (void *)cookie;
        dxp->ndescs = needed;

+       virtqueue_enqueue_offload(txvq, cookie, idx, head_size);
        start_dp = txvq->vq_ring.desc;
        start_dp[idx].addr =
                txvq->virtio_net_hdr_mem + idx * head_size;
-- 
1.7.7.6