Move emacs stuff to extras/

Change-Id: Ibbb7d8500e9064215cf912bd00bdf72a748f8a27
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 302 insertions, 0 deletions

diff --git a/extras/emacs/dual-loop-skel.el b/extras/emacs/dual-loop-skel.el
new file mode 100644
index 00000000000..b23d65acaf3
--- /dev/null
+++ b/extras/emacs/dual-loop-skel.el
@@ -0,0 +1,302 @@
+;;; dual-loop-skel.el - Eliotic dual-loop node skeleton
+
+(require 'skeleton)
+
+(define-skeleton skel-dual-loop
+"Insert a skeleton dual-loop graph node"
+nil
+'(setq node-name (skeleton-read "Node Name: "))
+'(setq uc-node-name (upcase node-name))
+"
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <vppinfra/hash.h>
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+
+typedef struct {
+  /* convenience */
+  vlib_main_t * vlib_main;
+  vnet_main_t * vnet_main;
+  ethernet_main_t * ethernet_main;
+} " node-name "_main_t;
+
+" node-name "_main_t " node-name "_main;
+
+vlib_node_registration_t " node-name "_node;
+
+typedef struct {
+  u32 next_index;
+  u32 sw_if_index;
+} " node-name "_trace_t;
+
+/* packet trace format function */
+static u8 * format_" node-name "_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  " node-name "_trace_t * t = va_arg (*args, " node-name "_trace_t *);
+  
+  s = format (s, \"" uc-node-name ": sw_if_index %d, next index %d\",
+              t->sw_if_index, t->next_index);
+  return s;
+}
+
+vlib_node_registration_t " node-name "_node;
+
+#define foreach_" node-name "_error \\
+_(SWAPPED, \"Mac swap packets processed\")
+
+typedef enum {
+#define _(sym,str) " uc-node-name "_ERROR_##sym,
+  foreach_" node-name "_error
+#undef _
+  " uc-node-name "_N_ERROR,
+} " node-name "_error_t;
+
+static char * " node-name "_error_strings[] = {
+#define _(sym,string) string,
+  foreach_" node-name "_error
+#undef _
+};
+
+typedef enum {
+  " uc-node-name "_NEXT_INTERFACE_OUTPUT,
+  " uc-node-name "_N_NEXT,
+} " node-name "_next_t;
+
+#define foreach_mac_address_offset              \\
+_(0)                                            \\
+_(1)                                            \\
+_(2)                                            \\
+_(3)                                            \\
+_(4)                                            \\
+_(5)
+
+static uword
+" node-name "_node_fn (vlib_main_t * vm,
+		  vlib_node_runtime_t * node,
+		  vlib_frame_t * frame)
+{
+  u32 n_left_from, * from, * to_next;
+  " node-name "_next_t next_index;
+  u32 pkts_swapped = 0;
+
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index,
+			   to_next, n_left_to_next);
+
+      while (n_left_from >= 4 && n_left_to_next >= 2)
+	{
+          u32 next0 = " uc-node-name "_NEXT_INTERFACE_OUTPUT;
+          u32 next1 = " uc-node-name "_NEXT_INTERFACE_OUTPUT;
+          u32 sw_if_index0, sw_if_index1;
+          u8 tmp0[6], tmp1[6];
+          ethernet_header_t *en0, *en1;
+          u32 bi0, bi1;
+	  vlib_buffer_t * b0, * b1;
+          
+	  /* Prefetch next iteration. */
+	  {
+	    vlib_buffer_t * p2, * p3;
+            
+	    p2 = vlib_get_buffer (vm, from[2]);
+	    p3 = vlib_get_buffer (vm, from[3]);
+            
+	    vlib_prefetch_buffer_header (p2, LOAD);
+	    vlib_prefetch_buffer_header (p3, LOAD);
+
+	    CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
+	    CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+	  }
+
+          /* speculatively enqueue b0 and b1 to the current next frame */
+	  to_next[0] = bi0 = from[0];
+	  to_next[1] = bi1 = from[1];
+	  from += 2;
+	  to_next += 2;
+	  n_left_from -= 2;
+	  n_left_to_next -= 2;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  b1 = vlib_get_buffer (vm, bi1);
+
+          /* $$$$$ Dual loop: process 2 x packets here $$$$$ */
+          ASSERT (b0->current_data == 0);
+          ASSERT (b1->current_data == 0);
+          
+          en0 = vlib_buffer_get_current (b0);
+          en1 = vlib_buffer_get_current (b1);
+
+          /* This is not the fastest way to swap src + dst mac addresses */
+#define _(a) tmp0[a] = en0->src_address[a];
+          foreach_mac_address_offset;
+#undef _
+#define _(a) en0->src_address[a] = en0->dst_address[a];
+          foreach_mac_address_offset;
+#undef _
+#define _(a) en0->dst_address[a] = tmp0[a];
+          foreach_mac_address_offset;
+#undef _
+
+#define _(a) tmp1[a] = en1->src_address[a];
+          foreach_mac_address_offset;
+#undef _
+#define _(a) en1->src_address[a] = en1->dst_address[a];
+          foreach_mac_address_offset;
+#undef _
+#define _(a) en1->dst_address[a] = tmp1[a];
+          foreach_mac_address_offset;
+#undef _
+
+          sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+          sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
+
+          /* Send pkt back out the RX interface */
+          vnet_buffer(b0)->sw_if_index[VLIB_TX] = sw_if_index0;
+          vnet_buffer(b1)->sw_if_index[VLIB_TX] = sw_if_index1;
+
+          pkts_swapped += 2;
+          /* $$$$$ End of processing 2 x packets $$$$$ */
+
+          if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)))
+            {
+              if (b0->flags & VLIB_BUFFER_IS_TRACED) 
+                {
+                    " node-name "_trace_t *t = 
+                      vlib_add_trace (vm, node, b0, sizeof (*t));
+                    t->sw_if_index = sw_if_index0;
+                    t->next_index = next0;
+                  }
+                if (b1->flags & VLIB_BUFFER_IS_TRACED) 
+                  {
+                    " node-name "_trace_t *t = 
+                      vlib_add_trace (vm, node, b1, sizeof (*t));
+                    t->sw_if_index = sw_if_index1;
+                    t->next_index = next1;
+                  }
+              }
+            
+            /* verify speculative enqueues, maybe switch current next frame */
+            vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+                                             to_next, n_left_to_next,
+                                             bi0, bi1, next0, next1);
+        }
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+          u32 bi0;
+	  vlib_buffer_t * b0;
+          u32 next0 = " uc-node-name "_NEXT_INTERFACE_OUTPUT;
+          u32 sw_if_index0;
+          u8 tmp0[6];
+          ethernet_header_t *en0;
+
+          /* speculatively enqueue b0 to the current next frame */
+	  bi0 = from[0];
+	  to_next[0] = bi0;
+	  from += 1;
+	  to_next += 1;
+	  n_left_from -= 1;
+	  n_left_to_next -= 1;
+
+	  b0 = vlib_get_buffer (vm, bi0);
+
+          /* $$$$$ Single loop: process 1  packet here $$$$$ */
+
+          /* 
+           * Direct from the driver, we should be at offset 0
+           * aka at &b0->data[0]
+           */
+          ASSERT (b0->current_data == 0);
+
+          en0 = vlib_buffer_get_current (b0);
+
+          /* This is not the fastest way to swap src + dst mac addresses */
+#define _(a) tmp0[a] = en0->src_address[a];
+          foreach_mac_address_offset;
+#undef _
+#define _(a) en0->src_address[a] = en0->dst_address[a];
+          foreach_mac_address_offset;
+#undef _
+#define _(a) en0->dst_address[a] = tmp0[a];
+          foreach_mac_address_offset;
+#undef _
+
+          sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+
+          /* Send pkt back out the RX interface */
+          vnet_buffer(b0)->sw_if_index[VLIB_TX] = sw_if_index0;
+
+          if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) 
+                            && (b0->flags & VLIB_BUFFER_IS_TRACED))) 
+            {
+              " node-name "_trace_t *t = 
+                 vlib_add_trace (vm, node, b0, sizeof (*t));
+              t->sw_if_index = sw_if_index0;
+              t->next_index = next0;
+            }
+            
+          pkts_swapped += 1;
+
+          /* $$$$$ Done processing 1 packet here $$$$$ */
+
+          /* verify speculative enqueue, maybe switch current next frame */
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+					   to_next, n_left_to_next,
+					   bi0, next0);
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  vlib_node_increment_counter (vm, " node-name "_node.index, 
+                               " uc-node-name "_ERROR_SWAPPED, pkts_swapped);
+  return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (" node-name "_node) = {
+  .function = " node-name "_node_fn,
+  .name = \"" node-name "\",
+  .vector_size = sizeof (u32),
+  .format_trace = format_" node-name "_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  
+  .n_errors = ARRAY_LEN(" node-name "_error_strings),
+  .error_strings = " node-name "_error_strings,
+
+  .n_next_nodes = " uc-node-name "_N_NEXT,
+
+  /* edit / add dispositions here */
+  .next_nodes = {
+        [" uc-node-name "_NEXT_INTERFACE_OUTPUT] = \"interface-output\",
+  },
+};
+
+clib_error_t *" node-name "_init (vlib_main_t *vm)
+{
+  " node-name "_main_t *msm = &" node-name "_main;
+    
+  /* $$$$$ Initialize " node-name "_main_t structure here. $$$$$ */
+  msm->vlib_main = vm;
+  msm->vnet_main = vnet_get_main();
+  msm->ethernet_main = ethernet_get_main(vm);
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION(" node-name "_init);
+")
+