net/virtio: support LRO

[dpdk.git] / drivers / net / virtio / virtio_rxtx.c

diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index 675dc43..0fa635a 100644 (file)
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -715,13 +715,36 @@ virtio_rx_offload(struct rte_mbuf *m, struct virtio_net_hdr *hdr)
                m->ol_flags |= PKT_RX_L4_CKSUM_GOOD;
        }
 
+       /* GSO request, save required information in mbuf */
+       if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
+               /* Check unsupported modes */
+               if ((hdr->gso_type & VIRTIO_NET_HDR_GSO_ECN) ||
+                   (hdr->gso_size == 0)) {
+                       return -EINVAL;
+               }
+
+               /* Update mss lengthes in mbuf */
+               m->tso_segsz = hdr->gso_size;
+               switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
+                       case VIRTIO_NET_HDR_GSO_TCPV4:
+                       case VIRTIO_NET_HDR_GSO_TCPV6:
+                               m->ol_flags |= PKT_RX_LRO | \
+                                       PKT_RX_L4_CKSUM_NONE;
+                               break;
+                       default:
+                               return -EINVAL;
+               }
+       }
+
        return 0;
 }
 
 static inline int
 rx_offload_enabled(struct virtio_hw *hw)
 {
-       return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM);
+       return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
+               vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
+               vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
 }
 
 #define VIRTIO_MBUF_BURST_SZ 64