[Mellanox][Smartswitch] Add no_wait option for dpu reboot and add platform information parsing (sonic-net#20943)

- Why I did it
Changes for dpuctlplat.py:
1. Added option to invoke systemctl rshim start/stop from the pmon container (Using dbus)
2. Added no_wait option for reboot (Since we do not need to wait for the dpu to be ready if NPU+DPU reboot is ongoing)
3. Added platform JSON parsing for rshim and pcie information

- How I did it
Changed dpuctlplat.py to support systemctl commands from pmon container using the dbus-send command

Author: gpunathilell

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

@@ -1,6 +1,7 @@
 #
-# Copyright (c) 2020-2024 NVIDIA CORPORATION & AFFILIATES.
-# Apache-2.0
+# SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
+# Copyright (c) 2020-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -19,12 +20,22 @@
 import os
 import time
 import re
+from enum import Enum
 
 from . import utils
 from sonic_py_common.general import check_output_pipe
 
 DEFAULT_WD_PERIOD = 65535
 
+
+class DpuInterfaceEnum(Enum):
+    MIDPLANE_INT = "midplane_interface"
+    RSHIM_INT = "rshim_info"
+    PCIE_INT = "bus_info"
+
+
+dpu_interface_values = [item.value for item in DpuInterfaceEnum]
+
 DEVICE_DATA = {
     'x86_64-mlnx_msn2700-r0': {
         'thermal': {
@@ -271,16 +282,26 @@ def get_linecard_max_port_count(cls):
     @classmethod
     @utils.read_only_cache()
     def get_platform_dpus_data(cls):
-        json_data = cls.get_platform_json_data()
+        from sonic_py_common import device_info
+        platform_path = device_info.get_path_to_platform_dir()
+        platform_json_path = os.path.join(platform_path, 'platform.json')
+        json_data = utils.load_json_file(platform_json_path)
         return json_data.get('DPUS', None)
 
+    @classmethod
+    def get_dpu_interface(cls, dpu, interface):
+        dpu_data = cls.get_platform_dpus_data()
+        if (not dpu_data) or (interface not in dpu_interface_values):
+            return None
+        return dpu_data.get(dpu, {}).get(interface)
+
     @classmethod
     @utils.read_only_cache()
-    def get_platform_json_data(cls):
-        from sonic_py_common import device_info
-        platform_path = device_info.get_path_to_platform_dir()
-        platform_json_path = os.path.join(platform_path, 'platform.json')
-        return utils.load_json_file(platform_json_path)
+    def get_dpu_count(cls):
+        dpu_data = cls.get_platform_dpus_data()
+        if not dpu_data:
+            return 0
+        return len(dpu_data)
 
     @classmethod
     def get_bios_component(cls):

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

@@ -0,0 +1,46 @@
+#
+# SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
+# Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from .vpd_parser import VpdParser
+
+
+class DpuVpdParser(VpdParser):
+    """DPU Specific VPD parser"""
+    def __init__(self, file_path, dpu_name):
+        super(DpuVpdParser, self).__init__(file_path=file_path)
+        self.dpu_name = dpu_name
+
+    def get_dpu_data(self, key=None):
+        """Retrieves VPD Entry for DPU Specific Key"""
+        return self.get_entry_value(f"{self.dpu_name}_{key}")
+
+    def get_dpu_base_mac(self):
+        """Retrieves VPD Entry for DPU Specific Mac Address"""
+        return self.get_dpu_data("BASE_MAC")
+
+    def get_dpu_serial(self):
+        """Retrieves VPD Entry for DPU Specific Serial Number"""
+        return self.get_dpu_data("SN")
+
+    def get_dpu_revision(self):
+        """Retrieves VPD Entry for DPU Specific Revision"""
+        return self.get_dpu_data("REV")
+
+    def get_dpu_model(self):
+        """Retrieves VPD Entry for DPU Specific Model Number"""
+        return self.get_dpu_data("PN")