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/** @file
Thunk driver's entry that install filter for DataRecord.
Copyright (c) 2009, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "Thunk.h"
//
// Global variables
//
LIST_ENTRY mStructureList;
/**
Entry Point of thunk driver.
@param[in] ImageHandle Image handle of this driver.
@param[in] SystemTable Pointer to EFI system table.
@retval EFI_SUCCESS The event handlers were registered.
@retval EFI_DEVICE_ERROR Failed to register the event handlers
**/
EFI_STATUS
EFIAPI
ThunkEntry (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_DATA_HUB_PROTOCOL *DataHub;
EFI_EVENT FilterEvent;
Status = gBS->LocateProtocol (&gEfiDataHubProtocolGuid, NULL, (VOID**) &DataHub);
ASSERT_EFI_ERROR (Status);
ASSERT (DataHub != NULL);
InitializeListHead (&mStructureList);
//
// Register SmBios Data Filter Function.
// This function is notified at TPL_CALLBACK.
//
Status = gBS->CreateEvent (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
SmbiosDataFilter,
NULL,
&FilterEvent
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = DataHub->RegisterFilterDriver (
DataHub,
FilterEvent,
TPL_APPLICATION,
EFI_DATA_RECORD_CLASS_DATA,
NULL
);
if (EFI_ERROR (Status)) {
gBS->CloseEvent (FilterEvent);
return Status;
}
return Status;
}
/**
Smbios data filter function. This function is invoked when there is data records
available in the Data Hub.
@param Event The event that is signaled.
@param Context not used here.
**/
VOID
EFIAPI
SmbiosDataFilter (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
EFI_DATA_HUB_PROTOCOL *DataHub;
EFI_HANDLE DataHubHandle;
UINTN HandleSize;
UINT64 MonotonicCount;
EFI_DATA_RECORD_HEADER *Record;
Status = EFI_SUCCESS;
DataHub = NULL;
//
// Get the Data Hub Protocol. Assume only one instance
// of Data Hub Protocol is availabe in the system.
//
HandleSize = sizeof (EFI_HANDLE);
Status = gBS->LocateHandle (
ByProtocol,
&gEfiDataHubProtocolGuid,
NULL,
&HandleSize,
&DataHubHandle
);
if (EFI_ERROR (Status)) {
goto Done;
}
Status = gBS->HandleProtocol (
DataHubHandle,
&gEfiDataHubProtocolGuid,
(VOID **) &DataHub
);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Get all available data records from data hub
//
MonotonicCount = 0;
Record = NULL;
do {
Status = DataHub->GetNextRecord (
DataHub,
&MonotonicCount,
&Event,
&Record
);
if (!EFI_ERROR (Status)) {
if (Record->DataRecordClass == EFI_DATA_RECORD_CLASS_DATA) {
//
// It's of expected Data Type. Process it.
//
SmbiosProcessDataRecord (Record);
}
}
} while (!EFI_ERROR (Status) && (MonotonicCount != 0));
Done:
return ;
}
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