Added shmem support for get port ecc counters Fixes JIRA https://jirasw.nvidia.com/browse/DGXOPENBMC-15778

diff --git a/nsmd/nsmPort/nsmPort.cpp b/nsmd/nsmPort/nsmPort.cpp
index e4f6a35..7e18179 100644
--- a/nsmd/nsmPort/nsmPort.cpp
+++ b/nsmd/nsmPort/nsmPort.cpp

@@ -1584,7 +1584,11 @@
     std::shared_ptr<PortECCIntf> portECCIntf) :
     NsmSensorAggregator(name, type),
     objPath(inventoryObjPath), portNumber(portNumber), portECCIntf(portECCIntf)
-{}
+{
+#ifdef NVIDIA_SHMEM
+    updateMetricOnSharedMemory();
+#endif
+}
 
 std::optional<std::vector<uint8_t>>
     NsmGetPortECCCounters::genRequestMsg(eid_t eid, uint8_t instanceId)
@@ -1653,9 +1657,48 @@
         }
     }
     portECCIntf->perLaneRawErrors(rawErrorsPerLane);
+
+    updateMetricOnSharedMemory();
     return NSM_SUCCESS;
 }
 
+void NsmGetPortECCCounters::updateMetricOnSharedMemory()
+{
+#ifdef NVIDIA_SHMEM
+    auto ifaceName = std::string(portECCIntf->interface);
+    std::vector<uint8_t> smbusData = {};
+
+    // Update SymbolErrors
+    {
+        nv::sensor_aggregation::DbusVariantType symbolErrorsValue{
+            portECCIntf->symbolErrors()};
+        std::string symbolErrorsProp = "SymbolErrors";
+        nsm_shmem_utils::updateSharedMemoryOnSuccess(
+            objPath, ifaceName, symbolErrorsProp, smbusData, symbolErrorsValue);
+    }
+
+    // Update CorrectedBits
+    {
+        nv::sensor_aggregation::DbusVariantType correctedBitsValue{
+            portECCIntf->correctedBits()};
+        std::string correctedBitsProp = "CorrectedBits";
+        nsm_shmem_utils::updateSharedMemoryOnSuccess(
+            objPath, ifaceName, correctedBitsProp, smbusData,
+            correctedBitsValue);
+    }
+
+    // Update PerLaneRawErrors
+    {
+        nv::sensor_aggregation::DbusVariantType perLaneRawErrorsValue{
+            portECCIntf->perLaneRawErrors()};
+        std::string perLaneRawErrorsProp = "PerLaneRawErrors";
+        nsm_shmem_utils::updateSharedMemoryOnSuccess(
+            objPath, ifaceName, perLaneRawErrorsProp, smbusData,
+            perLaneRawErrorsValue);
+    }
+#endif
+}
+
 static requester::Coroutine createNsmPortSensor(SensorManager& manager,
                                                 const std::string& interface,
                                                 const std::string& objPath,

diff --git a/nsmd/nsmPort/nsmPort.hpp b/nsmd/nsmPort/nsmPort.hpp
index 83b4d46..3d2f72b 100644
--- a/nsmd/nsmPort/nsmPort.hpp
+++ b/nsmd/nsmPort/nsmPort.hpp

@@ -230,6 +230,7 @@
     std::optional<std::vector<uint8_t>>
         genRequestMsg(eid_t eid, uint8_t instanceId) override;
     int handleSamples(const std::vector<TelemetrySample>& samples) override;
+    void updateMetricOnSharedMemory() override;
 
   private:
     std::string objPath;