mem_tg: read major and minor version

Add a function version_code() to combine major and minor version into a
single code for comparison to, e.g., guard version-dependent features.

Signed-off-by: Peter Colberg <peter.colberg@altera.com>

samples/mem_tg/mem_tg.h

@@ -211,6 +211,13 @@ class mem_tg : public test_afu {
     return res;
   }
 
+  // Combines major and minor version into single code for comparison.
+  static uint32_t version_code(uint32_t major, uint32_t minor)
+  {
+    // Major and minor version are encoded with 4 bits each.
+    return major * 16 + minor;
+  }
+
 public:
   uint32_t count_;
   std::vector<std::string> mem_ch_;
@@ -225,6 +232,7 @@ class mem_tg : public test_afu {
   uint32_t mem_speed_;
   uint32_t status_;
   uint64_t tg_offset_;
+  uint32_t version_;
 
   std::map<uint32_t, uint32_t> limits_;
 
@@ -265,6 +273,7 @@ class mem_tg : public test_afu {
     duplicate_obj->timeout_msec_ = this->timeout_msec_;
     duplicate_obj->handle_       = this->handle_;
     duplicate_obj->logger_       = this->logger_;
+    duplicate_obj->version_      = this->version_;
   }
 
 };

samples/mem_tg/tg_test.h

@@ -230,6 +230,11 @@ class tg_test : public test_command
       token_ = d_afu->get_token();
 
       // Read HW details
+      const uint64_t tg_version = tg_exe_->read64(TG_VERSION);
+      const uint32_t major_ver = (tg_version >> 12) & 0xf; // [51:48]
+      const uint32_t minor_ver = (tg_version >> 48) & 0xf; // [15:12]
+      tg_exe_->version_ = tg_exe_->version_code(major_ver, minor_ver);
+      tg_exe_->logger_->debug("version: {}.{}", major_ver, minor_ver);
 
       if (0 == tg_exe_->mem_speed_) {
         tg_exe_->mem_speed_ = 300;