X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fsvm%2Fsvm_fifo.h;h=e049d3e314719f2df52788b50e745e57da154fa3;hb=b4d3053;hp=a8aea00996ed2dd11209fad1f50acb24805a04ef;hpb=41c9e04be0ca3a081926045e78dc969dab563532;p=vpp.git

diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h
index a8aea00996e..e049d3e3147 100644
--- a/src/svm/svm_fifo.h
+++ b/src/svm/svm_fifo.h
@@ -36,8 +36,9 @@ 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)
+#define SVM_FIFO_TRACE 			(0)
+#define OOO_SEGMENT_INVALID_INDEX 	((u32)~0)
+#define SVM_FIFO_INVALID_SESSION_INDEX 	((u32)~0)
 
 typedef struct
 {
@@ -60,8 +61,10 @@ typedef struct _svm_fifo
   u8 master_thread_index;
   u8 client_thread_index;
   u32 segment_manager;
+  u32 ct_session_index;		/**< Local session index for vpp */
     CLIB_CACHE_LINE_ALIGN_MARK (end_shared);
   u32 head;
+  volatile u32 want_tx_evt;	/**< producer wants nudge */
     CLIB_CACHE_LINE_ALIGN_MARK (end_consumer);
 
   /* producer */
@@ -85,6 +88,12 @@ typedef enum
   SVM_FIFO_FULL = -2,
 } svm_fifo_err_t;
 
+typedef struct svm_fifo_segment_
+{
+  u8 *data;
+  u32 len;
+} svm_fifo_segment_t;
+
 #if SVM_FIFO_TRACE
 #define svm_fifo_trace_add(_f, _s, _l, _t)		\
 {							\
@@ -147,8 +156,8 @@ svm_fifo_has_ooo_data (svm_fifo_t * f)
 always_inline u8
 svm_fifo_set_event (svm_fifo_t * f)
 {
-//  return __sync_lock_test_and_set (&f->has_event, 1) == 0;
-//  return __sync_bool_compare_and_swap (&f->has_event, 0, 1);
+  /* return __sync_lock_test_and_set (&f->has_event, 1) == 0;
+     return __sync_bool_compare_and_swap (&f->has_event, 0, 1); */
   return !__atomic_exchange_n (&f->has_event, 1, __ATOMIC_RELEASE);
 }
 
@@ -160,7 +169,19 @@ svm_fifo_set_event (svm_fifo_t * f)
 always_inline void
 svm_fifo_unset_event (svm_fifo_t * f)
 {
-  __sync_lock_release (&f->has_event);
+  clib_atomic_release (&f->has_event);
+}
+
+static inline void
+svm_fifo_set_want_tx_evt (svm_fifo_t * f, u8 want_evt)
+{
+  f->want_tx_evt = want_evt;
+}
+
+static inline u8
+svm_fifo_want_tx_evt (svm_fifo_t * f)
+{
+  return f->want_tx_evt;
 }
 
 svm_fifo_t *svm_fifo_create (u32 data_size_in_bytes);
@@ -175,6 +196,8 @@ int svm_fifo_dequeue_nowait (svm_fifo_t * f, u32 max_bytes, u8 * copy_here);
 int svm_fifo_peek (svm_fifo_t * f, u32 offset, u32 max_bytes, u8 * copy_here);
 int svm_fifo_dequeue_drop (svm_fifo_t * f, u32 max_bytes);
 void svm_fifo_dequeue_drop_all (svm_fifo_t * f);
+int svm_fifo_segments (svm_fifo_t * f, svm_fifo_segment_t * fs);
+void svm_fifo_segments_free (svm_fifo_t * f, svm_fifo_segment_t * fs);
 u32 svm_fifo_number_ooo_segments (svm_fifo_t * f);
 ooo_segment_t *svm_fifo_first_ooo_segment (svm_fifo_t * f);
 void svm_fifo_init_pointers (svm_fifo_t * f, u32 pointer);