net/virtio: revert not claiming IP checksum offload

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

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 4b6f004..2ac2523 100644 (file)
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1671,12 +1671,13 @@ virtio_dev_configure(struct rte_eth_dev *dev)
                        return ret;
        }
 
-       /* Virtio does L4 checksum but not L3! */
-       if (rxmode->hw_ip_checksum) {
-               PMD_DRV_LOG(NOTICE,
-                           "virtio does not support IP checksum");
-               return -ENOTSUP;
-       }
+       /* The name hw_ip_checksum is a bit confusing since it can be
+        * set by the application to request L3 and/or L4 checksums. In
+        * case of virtio, only L4 checksum is supported.
+        */
+       if (rxmode->hw_ip_checksum)
+               req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
+
        if (rxmode->enable_lro)
                req_features |=
                        (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
@@ -1689,6 +1690,13 @@ virtio_dev_configure(struct rte_eth_dev *dev)
                        return ret;
        }
 
+       if (rxmode->hw_ip_checksum &&
+               !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
+               PMD_DRV_LOG(NOTICE,
+                       "rx checksum not available on this host");
+               return -ENOTSUP;
+       }
+
        if (rxmode->enable_lro &&
                (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
                        !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {