1 /** @file 2 Thunk driver's entry that install filter for DataRecord. 3 4 Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 #include "Thunk.h" 16 17 // 18 // Global variables 19 // 20 LIST_ENTRY mStructureList; 21 22 /** 23 Entry Point of thunk driver. 24 25 @param[in] ImageHandle Image handle of this driver. 26 @param[in] SystemTable Pointer to EFI system table. 27 28 @retval EFI_SUCCESS The event handlers were registered. 29 @retval EFI_DEVICE_ERROR Failed to register the event handlers 30 **/ 31 EFI_STATUS 32 EFIAPI 33 ThunkEntry ( 34 IN EFI_HANDLE ImageHandle, 35 IN EFI_SYSTEM_TABLE *SystemTable 36 ) 37 { 38 EFI_STATUS Status; 39 EFI_DATA_HUB_PROTOCOL *DataHub; 40 EFI_EVENT FilterEvent; 41 42 Status = gBS->LocateProtocol (&gEfiDataHubProtocolGuid, NULL, (VOID**) &DataHub); 43 ASSERT_EFI_ERROR (Status); 44 ASSERT (DataHub != NULL); 45 46 InitializeListHead (&mStructureList); 47 48 // 49 // Register SmBios Data Filter Function. 50 // This function is notified at TPL_CALLBACK. 51 // 52 Status = gBS->CreateEvent ( 53 EVT_NOTIFY_SIGNAL, 54 TPL_CALLBACK, 55 SmbiosDataFilter, 56 NULL, 57 &FilterEvent 58 ); 59 if (EFI_ERROR (Status)) { 60 return Status; 61 } 62 63 Status = DataHub->RegisterFilterDriver ( 64 DataHub, 65 FilterEvent, 66 TPL_APPLICATION, 67 EFI_DATA_RECORD_CLASS_DATA, 68 NULL 69 ); 70 if (EFI_ERROR (Status)) { 71 gBS->CloseEvent (FilterEvent); 72 return Status; 73 } 74 75 return Status; 76 77 } 78 79 /** 80 Smbios data filter function. This function is invoked when there is data records 81 available in the Data Hub. 82 83 @param Event The event that is signaled. 84 @param Context not used here. 85 **/ 86 VOID 87 EFIAPI 88 SmbiosDataFilter ( 89 IN EFI_EVENT Event, 90 IN VOID *Context 91 ) 92 { 93 EFI_STATUS Status; 94 EFI_DATA_HUB_PROTOCOL *DataHub; 95 EFI_HANDLE DataHubHandle; 96 UINTN HandleSize; 97 UINT64 MonotonicCount; 98 EFI_DATA_RECORD_HEADER *Record; 99 100 Status = EFI_SUCCESS; 101 DataHub = NULL; 102 103 // 104 // Get the Data Hub Protocol. Assume only one instance 105 // of Data Hub Protocol is available in the system. 106 // 107 HandleSize = sizeof (EFI_HANDLE); 108 109 Status = gBS->LocateHandle ( 110 ByProtocol, 111 &gEfiDataHubProtocolGuid, 112 NULL, 113 &HandleSize, 114 &DataHubHandle 115 ); 116 117 if (EFI_ERROR (Status)) { 118 goto Done; 119 } 120 121 Status = gBS->HandleProtocol ( 122 DataHubHandle, 123 &gEfiDataHubProtocolGuid, 124 (VOID **) &DataHub 125 ); 126 127 if (EFI_ERROR (Status)) { 128 goto Done; 129 } 130 // 131 // Get all available data records from data hub 132 // 133 MonotonicCount = 0; 134 Record = NULL; 135 136 do { 137 138 Status = DataHub->GetNextRecord ( 139 DataHub, 140 &MonotonicCount, 141 &Event, 142 &Record 143 ); 144 145 if (!EFI_ERROR (Status)) { 146 if (Record->DataRecordClass == EFI_DATA_RECORD_CLASS_DATA) { 147 148 // 149 // It's of expected Data Type. Process it. 150 // 151 SmbiosProcessDataRecord (Record); 152 } 153 } 154 } while (!EFI_ERROR (Status) && (MonotonicCount != 0)); 155 156 Done: 157 158 return ; 159 160 } 161
