Allowing the first time FEC and AN configuration to be pushed to SAI (sonic-net#1705)

**What I did**
Allowing the first time configuration for FEC and Autoneg to be pushed to SAI even if they are default.

**Why I did it**
In orchagent, the port struct is pre-initialized with fec = none and autoneg = false (Default SAI values). However in different hardware the underlying implementation might be different. There can also be requirement where the user values need to be forced. In current logic due to the port struct being initialized with default, fec = none or an = false configurations are not pushed from orchagent to SAI. In order to push it even in default case the conditional checks are modified.

Author: dgsudharsan

orchagent/port.h

@@ -152,6 +152,8 @@ class Port
     SystemPortInfo   m_system_port_info;
     SystemLagInfo    m_system_lag_info;
 
+    bool m_fec_cfg = false;
+    bool m_an_cfg = false;
 };
 
 }

orchagent/portsorch.cpp

@@ -2564,12 +2564,13 @@ void PortsOrch::doPortTask(Consumer &consumer)
             }
             else
             {
-                if (an != -1 && an != p.m_autoneg)
+                if (an != -1 && (!p.m_an_cfg || an != p.m_autoneg))
                 {
                     if (setPortAutoNeg(p.m_port_id, an))
                     {
                         SWSS_LOG_NOTICE("Set port %s AutoNeg to %u", alias.c_str(), an);
                         p.m_autoneg = an;
+                        p.m_an_cfg = true;
                         m_portList[alias] = p;
 
                         // Once AN is changed
@@ -2702,7 +2703,7 @@ void PortsOrch::doPortTask(Consumer &consumer)
                     if (fec_mode_map.find(fec_mode) != fec_mode_map.end())
                     {
                         /* reset fec mode upon mode change */
-                        if (p.m_fec_mode != fec_mode_map[fec_mode])
+                        if (!p.m_fec_cfg || p.m_fec_mode != fec_mode_map[fec_mode])
                         {
                             if (p.m_admin_state_up)
                             {
@@ -2716,6 +2717,7 @@ void PortsOrch::doPortTask(Consumer &consumer)
 
                                 p.m_admin_state_up = false;
                                 p.m_fec_mode = fec_mode_map[fec_mode];
+                                p.m_fec_cfg = true;
 
                                 if (setPortFec(p, p.m_fec_mode))
                                 {
@@ -2733,6 +2735,7 @@ void PortsOrch::doPortTask(Consumer &consumer)
                             {
                                 /* Port is already down, setting fec mode*/
                                 p.m_fec_mode = fec_mode_map[fec_mode];
+                                p.m_fec_cfg = true;
                                 if (setPortFec(p, p.m_fec_mode))
                                 {
                                     m_portList[alias] = p;

tests/test_port.py

@@ -70,6 +70,28 @@ def test_PortNotification(self, dvs, testlog):
 
         assert oper_status == "up"
 
+    def test_PortFecForce(self, dvs, testlog):
+        db = swsscommon.DBConnector(0, dvs.redis_sock, 0)
+        adb = dvs.get_asic_db()
+
+        ptbl = swsscommon.ProducerStateTable(db, "PORT_TABLE")
+
+        # set fec
+        fvs = swsscommon.FieldValuePairs([("fec","none")])
+        ptbl.set("Ethernet0", fvs)
+        fvs = swsscommon.FieldValuePairs([("fec","rs")])
+        ptbl.set("Ethernet4", fvs)
+
+        # validate if fec none is pushed to asic db when set first time
+        port_oid = adb.port_name_map["Ethernet0"]
+        expected_fields = {"SAI_PORT_ATTR_FEC_MODE":"SAI_PORT_FEC_MODE_NONE"}
+        adb.wait_for_field_match("ASIC_STATE:SAI_OBJECT_TYPE_PORT", port_oid, expected_fields)
+
+        # validate if fec rs is pushed to asic db when set first time
+        port_oid = adb.port_name_map["Ethernet4"]
+        expected_fields = {"SAI_PORT_ATTR_FEC_MODE":"SAI_PORT_FEC_MODE_RS"}
+        adb.wait_for_field_match("ASIC_STATE:SAI_OBJECT_TYPE_PORT", port_oid, expected_fields)
+
     def test_PortFec(self, dvs, testlog):
         dvs.runcmd("config interface startup Ethernet0")
         dvs.runcmd("config interface ip add Ethernet0 10.0.0.0/31")

tests/test_port_an.py

@@ -6,6 +6,29 @@
 
 
 class TestPortAutoNeg(object):
+    def test_PortAutoNegForce(self, dvs, testlog):
+
+        db = swsscommon.DBConnector(0, dvs.redis_sock, 0)
+        adb = dvs.get_asic_db()
+
+        tbl = swsscommon.ProducerStateTable(db, "PORT_TABLE")
+        fvs = swsscommon.FieldValuePairs([("autoneg","off")])
+        tbl.set("Ethernet0", fvs)
+
+        tbl = swsscommon.ProducerStateTable(db, "PORT_TABLE")
+        fvs = swsscommon.FieldValuePairs([("autoneg","on"), ("speed", "1000")])
+        tbl.set("Ethernet4", fvs)
+
+        # validate if autoneg false is pushed to asic db when set first time
+        port_oid = adb.port_name_map["Ethernet0"]
+        expected_fields = {"SAI_PORT_ATTR_AUTO_NEG_MODE":"false"}
+        adb.wait_for_field_match("ASIC_STATE:SAI_OBJECT_TYPE_PORT", port_oid, expected_fields)
+
+        # validate if autoneg true is pushed to asic db when set first time
+        port_oid = adb.port_name_map["Ethernet4"]
+        expected_fields = {"SAI_PORT_ATTR_AUTO_NEG_MODE":"true"}
+        adb.wait_for_field_match("ASIC_STATE:SAI_OBJECT_TYPE_PORT", port_oid, expected_fields)
+
     def test_PortAutoNegCold(self, dvs, testlog):
 
         db = swsscommon.DBConnector(0, dvs.redis_sock, 0)