common: Consider the last dimm as parent

Previously, there was only one DIMM under OCMB. Now, we have two DIMMs under one OCMB. Therefore, in the case of multiple DIMMs, we consider the last DIMM as the parent for OCMB. This approach resolves DIMM numbering issues on Bonnell, as considering OCMB as the parent was causing discrepancies.

Test Results:

Before: Dimm numbers were same for both ocmbs.

root@p10bmc:/tmp# guard -l
ID         | ERROR      | Type     | Path
0x00000001 | 0x50004cce | fatal    | physical:sys-0/node-0/ocmb_chip-4
0x00000002 | 0x50004cce | fatal    | physical:sys-0/node-0/ocmb_chip-5
swetha@IBM-PF3XHYG0:~$ curl -k -H "X-Auth-Token: $bmc_token" -X GET
https://${bmc}/redfish/v1/Systems/system/LogServices/HardwareIsolation
/Entries
{
  "@odata.id": "/redfish/v1/Systems/system/LogServices/HardwareIsolation
               /Entries",
  "@odata.type": "#LogEntryCollection.LogEntryCollection",
  "Description": "Collection of System Hardware Isolation Entries",
  "Members": [
    {
      "@odata.id": "/redfish/v1/Systems/system/LogServices
                    /HardwareIsolation/Entries/1",
      "@odata.type": "#LogEntry.v1_9_0.LogEntry",
      "AdditionalDataURI": "/redfish/v1/Systems/system/LogServices
                            /EventLog/Entries/2956/attachment",
      "Created": "2024-03-25T14:29:47+00:00",
      "EntryType": "Event",
      "Id": "1",
      "Links": {
        "OriginOfCondition": {
          "@odata.id": "/redfish/v1/Systems/system/Memory/dimm0"
        }
      },
      "Message": "OpenCAPI Memory Buffer",
      "Name": "Hardware Isolation Entry",
      "Severity": "Critical"
    },
    {
      "@odata.id": "/redfish/v1/Systems/system/LogServices
                    /HardwareIsolation/Entries/2",
      "@odata.type": "#LogEntry.v1_9_0.LogEntry",
      "AdditionalDataURI": "/redfish/v1/Systems/system/LogServices
                            /EventLog/Entries/2956/attachment",
      "Created": "2024-03-25T14:30:13+00:00",
      "EntryType": "Event",
      "Id": "2",
      "Links": {
        "OriginOfCondition": {
          "@odata.id": "/redfish/v1/Systems/system/Memory/dimm0"
        }
      },
      "Message": "OpenCAPI Memory Buffer",
      "Name": "Hardware Isolation Entry",
      "Severity": "Critical"
    }
  ],
  "Members@odata.count": 2,
  "Name": "Hardware Isolation Entries"
}

After: Dimm numbers are mapped correctly now.

root@p10bmc:/tmp/test# guard -l
ID         | ERROR      | Type      | Path
0x00000001 | 0x50004cce | fatal     | physical:sys-0/node-0/ocmb_chip-4
0x00000002 | 0x50004cce | fatal     | physical:sys-0/node-0/ocmb_chip-5
swetha@IBM-PF3XHYG0:~$ curl -k -H "X-Auth-Token: $bmc_token" -X GET
https://${bmc}/redfish/v1/Systems/system/LogServices/HardwareIsolation
/Entries
{
  "@odata.id": "/redfish/v1/Systems/system/LogServices/HardwareIsolation
                /Entries",
  "@odata.type": "#LogEntryCollection.LogEntryCollection",
  "Description": "Collection of System Hardware Isolation Entries",
  "Members": [
    {
      "@odata.id": "/redfish/v1/Systems/system/LogServices
                    /HardwareIsolation/Entries/1",
      "@odata.type": "#LogEntry.v1_9_0.LogEntry",
      "AdditionalDataURI": "/redfish/v1/Systems/system/LogServices
                            /EventLog/Entries/2956/attachment",
      "Created": "2024-03-25T14:29:47+00:00",
      "EntryType": "Event",
      "Id": "1",
      "Links": {
        "OriginOfCondition": {
          "@odata.id": "/redfish/v1/Systems/system/Memory/dimm0"
        }
      },
      "Message": "OpenCAPI Memory Buffer",
      "Name": "Hardware Isolation Entry",
      "Severity": "Critical"
    },
    {
      "@odata.id": "/redfish/v1/Systems/system/LogServices
                    /HardwareIsolation/Entries/2",
      "@odata.type": "#LogEntry.v1_9_0.LogEntry",
      "AdditionalDataURI": "/redfish/v1/Systems/system/LogServices
                            /EventLog/Entries/2956/attachment",
      "Created": "2024-03-25T14:30:13+00:00",
      "EntryType": "Event",
      "Id": "2",
      "Links": {
        "OriginOfCondition": {
          "@odata.id": "/redfish/v1/Systems/system/Memory/dimm1"
        }
      },
      "Message": "OpenCAPI Memory Buffer",
      "Name": "Hardware Isolation Entry",
      "Severity": "Critical"
    }
  ],
  "Members@odata.count": 2,
  "Name": "Hardware Isolation Entries"
}

Change-Id: I7c64d64d56bbfb9ff7094a751aee2e4ab417b4bf

ibm-openbmc / openpower-hw-isolation

common: Consider the last dimm as parent #89