[Mellanox] Change SDK API sx_mgmt_phy_module_info_get() to sysfs (#15963)

- Why I did it
Change Mellanox platform API implementation to use ASIC driver sysfs for the module operational state and status error fields.

- How I did it
Modify the platform/mellanox/mlnx-platform-api/sonic_platform/sfp.py file by change the call of sx_mgmt_phy_module_info_get() SDK API to sysfs

- How to verify it
Simulate the unplug cable event
Check the CLI output
sfputil show presence
sfputil show error-status -hw
Simulate the plug cable event
Repeat 2 step

Signed-off-by: vadymhlushko-mlnx <[email protected]>

Author: vadymhlushko-mlnx

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

@@ -134,6 +134,8 @@
 SFP_A2H_PAGE0_PATH = '0/i2c-0x51/data'
 SFP_SDK_MODULE_SYSFS_ROOT_TEMPLATE = '/sys/module/sx_core/asic0/module{}/'
 SFP_EEPROM_ROOT_TEMPLATE = SFP_SDK_MODULE_SYSFS_ROOT_TEMPLATE + 'eeprom/pages'
+SFP_SYSFS_STATUS = 'status'
+SFP_SYSFS_STATUS_ERROR = 'statuserror'
 SFP_SYSFS_PRESENT = 'present'
 SFP_SYSFS_RESET = 'reset'
 SFP_SYSFS_POWER_MODE = 'power_mode'
@@ -215,24 +217,18 @@ def sdk_handle(self):
     @classmethod
     def _get_module_info(self, sdk_handle, sdk_index):
         """
-        Get error code of the SFP module
+        Get oper state and error code of the SFP module
 
         Returns:
-            The error code fetch from SDK API
+            The oper state and error code fetched from sysfs
         """
-        module_id_info_list = new_sx_mgmt_module_id_info_t_arr(1)
-        module_info_list = new_sx_mgmt_phy_module_info_t_arr(1)
+        status_file_path = SFP_SDK_MODULE_SYSFS_ROOT_TEMPLATE.format(sdk_index) + SFP_SYSFS_STATUS
+        oper_state = utils.read_int_from_file(status_file_path)
 
-        module_id_info = sx_mgmt_module_id_info_t()
-        module_id_info.slot_id = 0
-        module_id_info.module_id = sdk_index
-        sx_mgmt_module_id_info_t_arr_setitem(module_id_info_list, 0, module_id_info)
+        status_error_file_path = SFP_SDK_MODULE_SYSFS_ROOT_TEMPLATE.format(sdk_index) + SFP_SYSFS_STATUS_ERROR
+        error_type = utils.read_int_from_file(status_error_file_path)
 
-        rc = sx_mgmt_phy_module_info_get(sdk_handle, module_id_info_list, 1, module_info_list)
-        assert SX_STATUS_SUCCESS == rc, "sx_mgmt_phy_module_info_get failed, error code {}".format(rc)
-
-        mod_info = sx_mgmt_phy_module_info_t_arr_getitem(module_info_list, 0)
-        return mod_info.module_state.oper_state, mod_info.module_state.error_type
+        return oper_state, error_type
 
 
 class SFP(NvidiaSFPCommon):