[Mellanox] Refactor platform API to remove dependency on database

platform/mellanox/mlnx-platform-api/sonic_platform/chassis.py

@@ -27,7 +27,6 @@
 
 MLNX_NUM_PSU = 2
 
-GET_HWSKU_CMD = "sonic-cfggen -d -v DEVICE_METADATA.localhost.hwsku"
 GET_PLATFORM_CMD = "sonic-cfggen -d -v DEVICE_METADATA.localhost.platform"
 
 EEPROM_CACHE_ROOT = '/var/cache/sonic/decode-syseeprom'
@@ -61,18 +60,12 @@ class Chassis(ChassisBase):
     def __init__(self):
         super(Chassis, self).__init__()
 
-        # Initialize SKU name and Platform name
-        self.sku_name = self._get_sku_name()
-        self.platform_name = self._get_platform_name()
-
-        mi = device_info.get_machine_info()
-        if mi is not None:
-            self.name = mi['onie_platform']
-            self.platform_name = device_info.get_platform()
-        else:
-            self.name = self.sku_name
-            self.platform_name = self._get_platform_name()
+        self.name = "Undefined"
+        self.model = "Undefined"
 
+        # Initialize Platform name
+        self.platform_name = device_info.get_platform()
+
         # move the initialization of each components to their dedicated initializer
         # which will be called from platform
         self.sfp_module_initialized = False
@@ -148,6 +141,9 @@ def initialize_eeprom(self):
         from eeprom import Eeprom
         # Initialize EEPROM
         self._eeprom = Eeprom()
+        # Get chassis name and model from eeprom
+        self.name = self._eeprom.get_product_name()
+        self.model = self._eeprom.get_part_number()
 
 
     def initialize_components(self):
@@ -173,6 +169,15 @@ def get_name(self):
         return self.name
 
 
+    def get_model(self):
+        """
+        Retrieves the model number (or part number) of the device
+
+        Returns:
+            string: Model/part number of device
+        """
+        return self.model
+
     ##############################################
     # SFP methods
     ##############################################
@@ -244,18 +249,6 @@ def _extract_num_of_fans_and_fan_drawers(self):
 
         return num_of_fan, num_of_drawer
 
-
-    def _get_sku_name(self):
-        p = subprocess.Popen(GET_HWSKU_CMD, shell=True, stdout=subprocess.PIPE)
-        out, err = p.communicate()
-        return out.rstrip('\n')
-
-
-    def _get_platform_name(self):
-        p = subprocess.Popen(GET_PLATFORM_CMD, shell=True, stdout=subprocess.PIPE)
-        out, err = p.communicate()
-        return out.rstrip('\n')
-
     def _get_port_position_tuple_by_platform_name(self):
         position_tuple = port_position_tuple_list[platform_dict_port[self.platform_name]]
         return position_tuple

platform/mellanox/mlnx-platform-api/sonic_platform/eeprom.py

@@ -80,13 +80,21 @@ def _load_eeprom(self):
             pass
 
         self._base_mac = self.mgmtaddrstr(eeprom)
-        if self._base_mac == None:
+        if self._base_mac is None:
             self._base_mac = "Undefined."
 
         self._serial_str = self.serial_number_str(eeprom)
-        if self._serial_str == None:
+        if self._serial_str is None:
             self._serial_str = "Undefined."
 
+        self._product_name = self.modelstr(eeprom)
+        if self._product_name is None:
+            self._product_name = "Undefined."
+
+        self._part_number = self.part_number_str(eeprom)
+        if self._part_number is None:
+            self._part_number = "Undefined."
+
         original_stdout = sys.stdout
         sys.stdout = StringIO()
         self.decode_eeprom(eeprom)
@@ -135,6 +143,28 @@ def get_serial_number(self):
             self._load_eeprom()
         return self._serial_str
 
+    def get_product_name(self):
+        """
+        Retrieves the hardware product name for the chassis
+
+        Returns:
+            A string containing the hardware product name for this chassis.
+        """
+        if not self._eeprom_loaded:
+            self._load_eeprom()
+        return self._product_name
+
+    def get_part_number(self):
+        """
+        Retrieves the hardware part number for the chassis
+
+        Returns:
+            A string containing the hardware part number for this chassis.
+        """
+        if not self._eeprom_loaded:
+            self._load_eeprom()
+        return self._part_number
+
     def get_system_eeprom_info(self):
         """
         Retrieves the full content of system EEPROM information for the chassis

platform/mellanox/mlnx-platform-api/sonic_platform/platform.py

@@ -20,6 +20,7 @@ def __init__(self):
             self._chassis = Chassis()
             self._chassis.initialize_components()
             self._chassis.initizalize_system_led()
+            self._chassis.initialize_eeprom()
         else:
             self._chassis = Chassis()
             self._chassis.initialize_psu()