commit 9e2a78564f0fc07f1ea3d15a31fa7ca3a0f6424d
author Mohsin Kazmi <sykazmi@cisco.com> Thu Aug 13 18:57:26 2020 +0200
committer Benoît Ganne <bganne@cisco.com> Mon Aug 17 08:46:53 2020 +0000
tree 03387739672584357b7038b67e998d8824de5d01
parent 00dd39044e64b4a7a33d204ef7d19aac819d71f5

tap: add gro support

Type: feature

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

src/vnet/devices/tap/tap.c

diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c
index fa5eef1..a76b4e0 100644
--- a/src/vnet/devices/tap/tap.c
+++ b/src/vnet/devices/tap/tap.c
@@ -730,6 +730,12 @@
     {
       hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
     }
+  if ((args->tap_flags & TAP_FLAG_GSO)
+      && (args->tap_flags & TAP_FLAG_GRO_COALESCE))
+    {
+      vif->packet_coalesce = 1;
+      virtio_set_packet_coalesce (vif);
+    }
   vnet_hw_interface_set_input_node (vnm, vif->hw_if_index,
 				    virtio_input_node.index);
 
@@ -827,6 +833,7 @@
   vec_foreach_index (i, vif->tap_fds)
     _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload);
   vif->gso_enabled = 0;
+  vif->packet_coalesce = 0;
   vif->csum_offload_enabled = enable_disable ? 1 : 0;
 
   if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0)
@@ -862,7 +869,8 @@
 }
 
 int
-tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable)
+tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable,
+			int is_packet_coalesce)
 {
   vnet_main_t *vnm = vnet_get_main ();
   virtio_main_t *mm = &virtio_main;
@@ -892,6 +900,11 @@
 	  hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
 	    VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
 	}
+      if (is_packet_coalesce)
+	{
+	  vif->packet_coalesce = 1;
+	  virtio_set_packet_coalesce (vif);
+	}
     }
   else
     {
@@ -900,6 +913,7 @@
 	  hw->flags &= ~(VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
 			 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD);
 	}
+      vif->packet_coalesce = 0;
     }
 
 error: