pg: add GSO support
[vpp.git] / src / vnet / pg / input.c
index 019c872..151624f 100644 (file)
@@ -50,6 +50,9 @@
 #include <vnet/vnet.h>
 #include <vnet/ethernet/ethernet.h>
 #include <vnet/feature/feature.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/udp/udp_packet.h>
 #include <vnet/devices/devices.h>
 
 static int
@@ -1108,7 +1111,7 @@ init_buffers_inline (vlib_main_t * vm,
        vnet_buffer (b1)->sw_if_index[VLIB_RX] = s->sw_if_index[VLIB_RX];
 
       vnet_buffer (b0)->sw_if_index[VLIB_TX] =
-       vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+       vnet_buffer (b1)->sw_if_index[VLIB_TX] = s->sw_if_index[VLIB_TX];
 
       if (set_data)
        {
@@ -1133,8 +1136,7 @@ init_buffers_inline (vlib_main_t * vm,
 
       b0 = vlib_get_buffer (vm, bi0);
       vnet_buffer (b0)->sw_if_index[VLIB_RX] = s->sw_if_index[VLIB_RX];
-      /* s->sw_if_index[VLIB_TX]; */
-      vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+      vnet_buffer (b0)->sw_if_index[VLIB_TX] = s->sw_if_index[VLIB_TX];
 
       if (set_data)
        clib_memcpy_fast (b0->data, data, n_data);
@@ -1266,7 +1268,7 @@ pg_stream_fill_replay (pg_main_t * pg, pg_stream_t * s, u32 n_alloc)
          b = vlib_get_buffer (vm, buffers[current_buffer_index]);
          clib_memcpy_fast (b->data, d0 + data_offset, bytes_this_chunk);
          vnet_buffer (b)->sw_if_index[VLIB_RX] = s->sw_if_index[VLIB_RX];
-         vnet_buffer (b)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+         vnet_buffer (b)->sw_if_index[VLIB_TX] = s->sw_if_index[VLIB_TX];
          b->flags = 0;
          b->next_buffer = 0;
          b->current_data = 0;
@@ -1427,7 +1429,7 @@ format_pg_input_trace (u8 * s, va_list * va)
     s = format (s, "stream %d", t->stream_index);
 
   s = format (s, ", %d bytes", t->packet_length);
-  s = format (s, ", %d sw_if_index", t->sw_if_index);
+  s = format (s, ", sw_if_index %d", t->sw_if_index);
 
   s = format (s, "\n%U%U",
              format_white_space, indent, format_vnet_buffer, &t->buffer);
@@ -1450,16 +1452,14 @@ format_pg_input_trace (u8 * s, va_list * va)
 
 static void
 pg_input_trace (pg_main_t * pg,
-               vlib_node_runtime_t * node,
-               pg_stream_t * s, u32 * buffers, u32 n_buffers)
+               vlib_node_runtime_t * node, u32 stream_index, u32 next_index,
+               u32 * buffers, u32 n_buffers)
 {
   vlib_main_t *vm = vlib_get_main ();
-  u32 *b, n_left, stream_index, next_index;
+  u32 *b, n_left;
 
   n_left = n_buffers;
   b = buffers;
-  stream_index = s - pg->streams;
-  next_index = s->next_index;
 
   while (n_left >= 2)
     {
@@ -1526,6 +1526,70 @@ pg_input_trace (pg_main_t * pg,
     }
 }
 
+static_always_inline void
+fill_gso_buffer_flags (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
+                      u32 packet_data_size)
+{
+
+  for (int i = 0; i < n_buffers; i++)
+    {
+      vlib_buffer_t *b0 = vlib_get_buffer (vm, buffers[i]);
+      u8 l4_proto = 0;
+      u8 l4_hdr_sz = 0;
+
+      ethernet_header_t *eh = (ethernet_header_t *) b0->data;
+      u16 ethertype = clib_net_to_host_u16 (eh->type);
+      u16 l2hdr_sz = sizeof (ethernet_header_t);
+
+      vnet_buffer (b0)->l2_hdr_offset = 0;
+      vnet_buffer (b0)->l3_hdr_offset = l2hdr_sz;
+      if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP4))
+       {
+         ip4_header_t *ip4 = (ip4_header_t *) (b0->data + l2hdr_sz);
+         vnet_buffer (b0)->l4_hdr_offset = l2hdr_sz + ip4_header_bytes (ip4);
+         l4_proto = ip4->protocol;
+         b0->flags |=
+           (VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID
+            | VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+            VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
+         b0->flags |= VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+       }
+      else if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP6))
+       {
+         ip6_header_t *ip6 = (ip6_header_t *) (b0->data + l2hdr_sz);
+         /* FIXME IPv6 EH traversal */
+         vnet_buffer (b0)->l4_hdr_offset = l2hdr_sz + sizeof (ip6_header_t);
+         l4_proto = ip6->protocol;
+         b0->flags |=
+           (VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID
+            | VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+            VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
+         b0->flags |= VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+       }
+      if (l4_proto == IP_PROTOCOL_TCP)
+       {
+         b0->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+         tcp_header_t *tcp = (tcp_header_t *) (b0->data +
+                                               vnet_buffer
+                                               (b0)->l4_hdr_offset);
+         l4_hdr_sz = tcp_header_bytes (tcp);
+         tcp->checksum = 0;
+         vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
+         vnet_buffer2 (b0)->gso_size = packet_data_size;
+         b0->flags |= VNET_BUFFER_F_GSO;
+       }
+      else if (l4_proto == IP_PROTOCOL_UDP)
+       {
+         b0->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
+         udp_header_t *udp = (udp_header_t *) (b0->data +
+                                               vnet_buffer
+                                               (b0)->l4_hdr_offset);
+         vnet_buffer2 (b0)->gso_l4_hdr_sz = sizeof (*udp);
+         udp->checksum = 0;
+       }
+    }
+}
+
 static uword
 pg_generate_packets (vlib_node_runtime_t * node,
                     pg_main_t * pg,
@@ -1541,6 +1605,7 @@ pg_generate_packets (vlib_node_runtime_t * node,
   u8 feature_arc_index = fm->device_input_feature_arc_index;
   cm = &fm->feature_config_mains[feature_arc_index];
   u32 current_config_index = ~(u32) 0;
+  pg_interface_t *pi = pool_elt_at_index (pg->interfaces, s->pg_if_index);
   int i;
 
   bi0 = s->buffer_indices;
@@ -1567,16 +1632,15 @@ pg_generate_packets (vlib_node_runtime_t * node,
          vlib_next_frame_t *nf;
          vlib_frame_t *f;
          ethernet_input_frame_t *ef;
-         pg_interface_t *pi;
          vlib_get_new_next_frame (vm, node, next_index, to_next, n_left);
          nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
-         f = vlib_get_frame (vm, nf->frame_index);
+         f = vlib_get_frame (vm, nf->frame);
          f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
 
          ef = vlib_frame_scalar_args (f);
-         pi = pool_elt_at_index (pg->interfaces, s->pg_if_index);
          ef->sw_if_index = pi->sw_if_index;
          ef->hw_if_index = pi->hw_if_index;
+         vlib_frame_no_append (f);
        }
       else
        vlib_get_next_frame (vm, node, next_index, to_next, n_left);
@@ -1617,11 +1681,14 @@ pg_generate_packets (vlib_node_runtime_t * node,
            vnet_buffer (b)->feature_arc_index = feature_arc_index;
          }
 
+      if (pi->gso_enabled)
+       fill_gso_buffer_flags (vm, to_next, n_this_frame, pi->gso_size);
+
       n_trace = vlib_get_trace_count (vm, node);
       if (n_trace > 0)
        {
          u32 n = clib_min (n_trace, n_this_frame);
-         pg_input_trace (pg, node, s, to_next, n);
+         pg_input_trace (pg, node, s - pg->streams, next_index, to_next, n);
          vlib_set_trace_count (vm, node, n_trace - n);
        }
       n_packets_to_generate -= n_this_frame;