kfdtest: Add SDMANopPacket class

The class is very useful for triaging complex SDMA issues.

Change-Id: Ib5de729f7fc62f41e894ef98d3967e7e1745d454
Signed-off-by: Yong Zhao <Yong.Zhao@amd.com>

tests/kfdtest/include/sdma_pkt_struct.h

@@ -25,6 +25,7 @@
 #define __SDMA_PKT_STRUCT_H__
 
 
+const unsigned int SDMA_OP_NOP = 0;
 const unsigned int SDMA_OP_COPY = 1;
 const unsigned int SDMA_OP_WRITE = 2;
 
@@ -354,4 +355,33 @@ typedef struct SDMA_PKT_TIMESTAMP_TAG
     } ADDR_HI_UNION;
 } SDMA_PKT_TIMESTAMP, *PSDMA_PKT_TIMESTAMP;
 
+
+/*
+** Definitions for SDMA_PKT_NOP packet
+*/
+
+typedef struct SDMA_PKT_NOP_TAG
+{
+    union
+    {
+        struct
+        {
+            unsigned int op:8;
+            unsigned int sub_op:8;
+            unsigned int count:14;
+            unsigned int reserved_0:2;
+        };
+        unsigned int DW_0_DATA;
+    } HEADER_UNION;
+
+    union
+    {
+        struct
+        {
+            unsigned int data0:32;
+        };
+        unsigned int DW_1_DATA;
+    } DATA0_UNION;
+} SDMA_PKT_NOP, *PSDMA_PKT_NOP;
+
 #endif // __SDMA_PKT_STRUCT_H__