1 files changed, 41 insertions, 0 deletions

diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h
index fe21de476d7..a83cd858f83 100644
--- a/src/svm/svm_fifo.h
+++ b/src/svm/svm_fifo.h
@@ -36,8 +36,16 @@ typedef struct
 format_function_t format_ooo_segment;
 format_function_t format_ooo_list;
 
+#define SVM_FIFO_TRACE (0)
 #define OOO_SEGMENT_INVALID_INDEX ((u32)~0)
 
+typedef struct
+{
+  u32 offset;
+  u32 len;
+  u32 action;
+} svm_fifo_trace_elem_t;
+
 typedef struct _svm_fifo
 {
   volatile u32 cursize;		/**< current fifo size */
@@ -64,9 +72,28 @@ typedef struct _svm_fifo
   u32 ooos_newest;		/**< Last segment to have been updated */
   struct _svm_fifo *next;	/**< next in freelist/active chain */
   struct _svm_fifo *prev;	/**< prev in active chain */
+#if SVM_FIFO_TRACE
+  svm_fifo_trace_elem_t *trace;
+#endif
     CLIB_CACHE_LINE_ALIGN_MARK (data);
 } svm_fifo_t;
 
+#if SVM_FIFO_TRACE
+#define svm_fifo_trace_add(_f, _s, _l, _t)		\
+{							\
+  svm_fifo_trace_elem_t *trace_elt;			\
+  vec_add2(_f->trace, trace_elt, 1);			\
+  trace_elt->offset = _s;				\
+  trace_elt->len = _l;					\
+  trace_elt->action = _t;				\
+}
+#else
+#define svm_fifo_trace_add(_f, _s, _l, _t)
+#endif
+
+u8 *svm_fifo_dump_trace (u8 * s, svm_fifo_t * f);
+u8 *svm_fifo_replay (u8 * s, svm_fifo_t * f, u8 no_read, u8 verbose);
+
 static inline u32
 svm_fifo_max_dequeue (svm_fifo_t * f)
 {
@@ -132,6 +159,12 @@ svm_fifo_newest_ooo_segment (svm_fifo_t * f)
   return pool_elt_at_index (f->ooo_segments, f->ooos_newest);
 }
 
+always_inline void
+svm_fifo_newest_ooo_segment_reset (svm_fifo_t * f)
+{
+  f->ooos_newest = OOO_SEGMENT_INVALID_INDEX;
+}
+
 always_inline u32
 ooo_segment_distance_from_tail (svm_fifo_t * f, u32 pos)
 {
@@ -174,6 +207,14 @@ ooo_segment_get_prev (svm_fifo_t * f, ooo_segment_t * s)
   return pool_elt_at_index (f->ooo_segments, s->prev);
 }
 
+always_inline ooo_segment_t *
+ooo_segment_next (svm_fifo_t * f, ooo_segment_t * s)
+{
+  if (s->next == OOO_SEGMENT_INVALID_INDEX)
+    return 0;
+  return pool_elt_at_index (f->ooo_segments, s->next);
+}
+
 #endif /* __included_ssvm_fifo_h__ */
 
 /*