session: support dma option

add dma support to session, acclerate host-stack with dma

Type: feature

Signed-off-by: Marvin Liu <yong.liu@intel.com>
Signed-off-by: Junfeng Wang <drenfong.wang@intel.com>
Change-Id: I3d492921d69d9e3e0b34d33adc33fba3bde9e1cc

1 files changed, 20 insertions, 0 deletions

diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h
index 68ed8431605..a68e51239bd 100644
--- a/src/vnet/session/session.h
+++ b/src/vnet/session/session.h
@@ -21,6 +21,7 @@
 #include <vnet/session/session_debug.h>
 #include <svm/message_queue.h>
 #include <svm/fifo_segment.h>
+#include <vlib/dma/dma.h>
 
 #define foreach_session_input_error                                    	\
 _(NO_SESSION, "No session drops")                                       \
@@ -85,6 +86,13 @@ typedef enum session_wrk_flags_
   SESSION_WRK_F_ADAPTIVE = 1 << 0,
 } __clib_packed session_wrk_flag_t;
 
+#define DMA_TRANS_SIZE 1024
+typedef struct
+{
+  u32 *pending_tx_buffers;
+  u16 *pending_tx_nexts;
+} session_dma_transfer;
+
 typedef struct session_worker_
 {
   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
@@ -155,6 +163,15 @@ typedef struct session_worker_
   /** List head for first worker evts pending handling on main */
   clib_llist_index_t evts_pending_main;
 
+  int config_index;
+  u8 dma_enabled;
+  session_dma_transfer *dma_trans;
+  u16 trans_head;
+  u16 trans_tail;
+  u16 trans_size;
+  u16 batch_num;
+  vlib_dma_batch_t *batch;
+
 #if SESSION_DEBUG
   /** last event poll time by thread */
   clib_time_type_t last_event_poll;
@@ -237,6 +254,9 @@ typedef struct session_main_
   /** Session ssvm segment configs*/
   uword wrk_mqs_segment_size;
 
+  /** Session enable dma*/
+  u8 dma_enabled;
+
   /** Session table size parameters */
   u32 configured_v4_session_table_buckets;
   u32 configured_v4_session_table_memory;