tap: add gro support

Type: feature

Change-Id: I5868dd267aa26aa97aec5fd70e70c5956ac52277
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

1 files changed, 26 insertions, 7 deletions

diff --git a/src/vnet/devices/virtio/device.c b/src/vnet/devices/virtio/device.c
index 45c390d415d..99157cd6166 100644
--- a/src/vnet/devices/virtio/device.c
+++ b/src/vnet/devices/virtio/device.c
@@ -23,6 +23,7 @@
 #include <vlib/unix/unix.h>
 #include <vnet/vnet.h>
 #include <vnet/ethernet/ethernet.h>
+#include <vnet/gso/gro_func.h>
 #include <vnet/gso/hdr_offset_parser.h>
 #include <vnet/ip/ip4_packet.h>
 #include <vnet/ip/ip6_packet.h>
@@ -502,7 +503,7 @@ static_always_inline uword
 virtio_interface_tx_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 				vlib_frame_t * frame, virtio_if_t * vif,
 				virtio_if_type_t type, int do_gso,
-				int csum_offload)
+				int csum_offload, int do_gro)
 {
   u16 n_left = frame->n_vectors;
   virtio_vring_t *vring;
@@ -513,6 +514,7 @@ virtio_interface_tx_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
   u16 mask = sz - 1;
   u16 retry_count = 2;
   u32 *buffers = vlib_frame_vector_args (frame);
+  u32 to[GRO_TO_VECTOR_SIZE (n_left)];
 
   clib_spinlock_lock_if_init (&vring->lockp);
 
@@ -520,6 +522,12 @@ virtio_interface_tx_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
       (vring->last_kick_avail_idx != vring->avail->idx))
     virtio_kick (vm, vring, vif);
 
+  if (do_gro)
+    {
+      n_left = vnet_gro_inline (vm, vring->flow_table, buffers, n_left, to);
+      buffers = to;
+    }
+
 retry:
   /* free consumed buffers */
   virtio_free_used_device_desc (vm, vring, node->node_index);
@@ -621,7 +629,8 @@ retry:
       if (retry_count--)
 	goto retry;
 
-      virtio_interface_drop_inline (vm, node->node_index, buffers, n_left,
+      virtio_interface_drop_inline (vm, node->node_index,
+				    buffers, n_left,
 				    VIRTIO_TX_ERROR_NO_FREE_SLOTS);
     }
 
@@ -641,15 +650,18 @@ virtio_interface_tx_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
   if (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
     return virtio_interface_tx_gso_inline (vm, node, frame, vif, type,
 					   1 /* do_gso */ ,
-					   1 /* checksum offload */ );
+					   1 /* checksum offload */ ,
+					   vif->packet_coalesce);
   else if (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
     return virtio_interface_tx_gso_inline (vm, node, frame, vif, type,
 					   0 /* no do_gso */ ,
-					   1 /* checksum offload */ );
+					   1 /* checksum offload */ ,
+					   0 /* do_gro */ );
   else
     return virtio_interface_tx_gso_inline (vm, node, frame, vif, type,
 					   0 /* no do_gso */ ,
-					   0 /* no checksum offload */ );
+					   0 /* no checksum offload */ ,
+					   0 /* do_gro */ );
 }
 
 VNET_DEVICE_CLASS_TX_FN (virtio_device_class) (vlib_main_t * vm,
@@ -717,9 +729,16 @@ virtio_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
     }
 
   if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
-    vring->avail->flags |= VIRTIO_RING_FLAG_MASK_INT;
+    {
+      /* only enable packet coalesce in poll mode */
+      gro_flow_table_set_is_enable (vring->flow_table, 1);
+      vring->avail->flags |= VIRTIO_RING_FLAG_MASK_INT;
+    }
   else
-    vring->avail->flags &= ~VIRTIO_RING_FLAG_MASK_INT;
+    {
+      gro_flow_table_set_is_enable (vring->flow_table, 0);
+      vring->avail->flags &= ~VIRTIO_RING_FLAG_MASK_INT;
+    }
 
   return 0;
 }