[FEC]Auto FEC initial changes (#2893)

* [FEC]Auto FEC initial changes
Initial Changes to support Auto FEC feature. Added support for mode "auto" in FEC

Why I did it
To implement auto FEC feature HLD: sonic-net/SONiC#1416

Author: dgsudharsan

orchagent/p4orch/tests/fake_portorch.cpp

@@ -537,7 +537,12 @@ bool PortsOrch::getPortPvid(Port &port, sai_uint32_t &pvid)
     return true;
 }
 
-bool PortsOrch::setPortFec(Port &port, sai_port_fec_mode_t fec_mode)
+bool PortsOrch::setPortFec(Port &port, sai_port_fec_mode_t fec_mode, bool override_fec)
+{
+    return true;
+}
+
+bool PortsOrch::isFecModeSupported(const Port &port, sai_port_fec_mode_t fec_mode)
 {
     return true;
 }
@@ -581,12 +586,12 @@ bool PortsOrch::getPortSpeed(sai_object_id_t port_id, sai_uint32_t &speed)
     return true;
 }
 
-bool PortsOrch::setGearboxPortsAttr(const Port &port, sai_port_attr_t id, void *value)
+bool PortsOrch::setGearboxPortsAttr(const Port &port, sai_port_attr_t id, void *value, bool override_fec)
 {
     return true;
 }
 
-bool PortsOrch::setGearboxPortAttr(const Port &port, dest_port_type_t port_type, sai_port_attr_t id, void *value)
+bool PortsOrch::setGearboxPortAttr(const Port &port, dest_port_type_t port_type, sai_port_attr_t id, void *value, bool override_fec)
 {
     return true;
 }

orchagent/port.h

@@ -199,6 +199,7 @@ class Port
     bool m_intf_cfg = false;      // Interface type
     bool m_adv_intf_cfg = false;  // Advertised interface type
     bool m_fec_cfg = false;       // Forward Error Correction (FEC)
+    bool m_override_fec = false;  // Enable Override FEC
     bool m_pfc_asym_cfg = false;  // Asymmetric Priority Flow Control (PFC)
     bool m_lm_cfg = false;        // Forwarding Database (FDB) Learning Mode (LM)
     bool m_lt_cfg = false;        // Link Training (LT)

orchagent/port/portcnt.h

@@ -70,6 +70,7 @@ class PortConfig final
     struct {
         sai_port_fec_mode_t value;
         bool is_set = false;
+        bool override_fec = false;
     } fec; // Port FEC
 
     struct {

orchagent/port/porthlpr.cpp

@@ -74,7 +74,8 @@ static const std::unordered_map<std::string, sai_port_fec_mode_t> portFecMap =
 {
     { PORT_FEC_NONE, SAI_PORT_FEC_MODE_NONE },
     { PORT_FEC_RS,   SAI_PORT_FEC_MODE_RS   },
-    { PORT_FEC_FC,   SAI_PORT_FEC_MODE_FC   }
+    { PORT_FEC_FC,   SAI_PORT_FEC_MODE_FC   },
+    { PORT_FEC_AUTO, SAI_PORT_FEC_MODE_NONE }
 };
 
 static const std::unordered_map<sai_port_fec_mode_t, std::string> portFecRevMap =
@@ -84,6 +85,14 @@ static const std::unordered_map<sai_port_fec_mode_t, std::string> portFecRevMap
     { SAI_PORT_FEC_MODE_FC,   PORT_FEC_FC   }
 };
 
+static const std::unordered_map<std::string, bool> portFecOverrideMap =
+{
+    { PORT_FEC_NONE, true  },
+    { PORT_FEC_RS,   true  },
+    { PORT_FEC_FC,   true  },
+    { PORT_FEC_AUTO, false }
+};
+
 static const std::unordered_map<std::string, sai_port_priority_flow_control_mode_t> portPfcAsymMap =
 {
     { PORT_MODE_ON,  SAI_PORT_PRIORITY_FLOW_CONTROL_MODE_SEPARATE },
@@ -146,6 +155,30 @@ bool PortHelper::fecToStr(std::string &str, sai_port_fec_mode_t value) const
     return true;
 }
 
+bool PortHelper::fecToSaiFecMode(const std::string &str, sai_port_fec_mode_t &value) const
+{
+    const auto &cit = portFecMap.find(str);
+    if (cit == portFecMap.cend())
+    {
+        return false;
+    }
+
+    value = cit->second;
+
+    return true;
+}
+
+bool PortHelper::fecIsOverrideRequired(const std::string &str) const
+{
+    const auto &cit = portFecMap.find(str);
+    if (cit == portFecMap.cend())
+    {
+        return false;
+    }
+
+    return cit->second;
+
+}
 std::string PortHelper::getFieldValueStr(const PortConfig &port, const std::string &field) const
 {
     static std::string str;
@@ -468,8 +501,16 @@ bool PortHelper::parsePortFec(PortConfig &port, const std::string &field, const
         return false;
     }
 
+    const auto &override_cit = portFecOverrideMap.find(value);
+    if (override_cit == portFecOverrideMap.cend())
+    {
+        SWSS_LOG_ERROR("Failed to parse field(%s): invalid value(%s) in override map", field.c_str(), value.c_str());
+        return false;
+    }
+
     port.fec.value = cit->second;
     port.fec.is_set = true;
+    port.fec.override_fec =override_cit->second;
 
     return true;
 }

orchagent/port/porthlpr.h

@@ -15,6 +15,8 @@ class PortHelper final
 
 public:
     bool fecToStr(std::string &str, sai_port_fec_mode_t value) const;
+    bool fecToSaiFecMode(const std::string &str, sai_port_fec_mode_t &value) const;
+    bool fecIsOverrideRequired(const std::string &str) const;
 
     std::string getAutonegStr(const PortConfig &port) const;
     std::string getPortInterfaceTypeStr(const PortConfig &port) const;

orchagent/port/portschema.h

@@ -38,6 +38,7 @@
 #define PORT_FEC_NONE "none"
 #define PORT_FEC_RS   "rs"
 #define PORT_FEC_FC   "fc"
+#define PORT_FEC_AUTO "auto"
 
 #define PORT_LEARN_MODE_DROP         "drop"
 #define PORT_LEARN_MODE_DISABLE      "disable"