3db510989e
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3401 6f19259b-4bc3-4df7-8a09-765794883524
655 lines
20 KiB
C
655 lines
20 KiB
C
/**@file
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This code produces the Data Hub protocol. It preloads the data hub
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with status information copied in from PEI HOBs.
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Only code that implements the Data Hub protocol should go in this file!
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The Term MTC stands for MonoTonicCounter.
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For more information please look at DataHub.doc
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NOTE: For extra security of the log GetNextDataRecord () could return a copy
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of the data record.
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Copyright (c) 2006, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "DataHub.h"
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CONST EFI_GUID gZeroGuid = { 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 } };
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//
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// Worker functions private to this file
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//
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STATIC
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DATA_HUB_FILTER_DRIVER *
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FindFilterDriverByEvent (
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IN LIST_ENTRY *Head,
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IN EFI_EVENT Event
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);
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STATIC
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EFI_DATA_RECORD_HEADER *
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GetNextDataRecord (
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IN LIST_ENTRY *Head,
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IN UINT64 ClassFilter,
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IN OUT UINT64 *PtrCurrentMTC
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);
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STATIC
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EFI_STATUS
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EFIAPI
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DataHubLogData (
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IN EFI_DATA_HUB_PROTOCOL *This,
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IN EFI_GUID *DataRecordGuid,
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IN EFI_GUID *ProducerName,
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IN UINT64 DataRecordClass,
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IN VOID *RawData,
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IN UINT32 RawDataSize
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)
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/*++
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Routine Description:
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Log data record into the data logging hub
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Arguments:
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This - Protocol instance structure
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DataRecordGuid - GUID that defines record contents
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ProducerName - GUID that defines the name of the producer of the data
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DataRecordClass - Class that defines generic record type
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RawData - Data Log record as defined by DataRecordGuid
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RawDataSize - Size of Data Log data in bytes
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Returns:
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EFI_SUCCESS - If data was logged
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EFI_OUT_OF_RESOURCES - If data was not logged due to lack of system
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resources.
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--*/
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{
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EFI_STATUS Status;
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DATA_HUB_INSTANCE *Private;
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EFI_DATA_ENTRY *LogEntry;
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UINT32 TotalSize;
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UINT32 RecordSize;
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EFI_DATA_RECORD_HEADER *Record;
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VOID *Raw;
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DATA_HUB_FILTER_DRIVER *FilterEntry;
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LIST_ENTRY *Link;
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LIST_ENTRY *Head;
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Private = DATA_HUB_INSTANCE_FROM_THIS (This);
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//
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// Combine the storage for the internal structs and a copy of the log record.
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// Record follows PrivateLogEntry. The consumer will be returned a pointer
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// to Record so we don't what it to be the thing that was allocated from
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// pool, so the consumer can't free an data record by mistake.
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//
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RecordSize = sizeof (EFI_DATA_RECORD_HEADER) + RawDataSize;
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TotalSize = sizeof (EFI_DATA_ENTRY) + RecordSize;
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//
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// The Logging action is the critical section, so it is locked.
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// The MTC asignment & update, time, and logging must be an
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// atomic operation, so use the lock.
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//
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Status = EfiAcquireLockOrFail (&Private->DataLock);
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if (EFI_ERROR (Status)) {
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//
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// Reentrancy detected so exit!
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//
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return Status;
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}
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LogEntry = AllocatePool (TotalSize);
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if (LogEntry == NULL) {
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EfiReleaseLock (&Private->DataLock);
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return EFI_OUT_OF_RESOURCES;
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}
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ZeroMem (LogEntry, TotalSize);
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Record = (EFI_DATA_RECORD_HEADER *) (LogEntry + 1);
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Raw = (VOID *) (Record + 1);
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//
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// Build Standard Log Header
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//
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Record->Version = EFI_DATA_RECORD_HEADER_VERSION;
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Record->HeaderSize = sizeof (EFI_DATA_RECORD_HEADER);
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Record->RecordSize = RecordSize;
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CopyMem (&Record->DataRecordGuid, DataRecordGuid, sizeof (EFI_GUID));
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CopyMem (&Record->ProducerName, ProducerName, sizeof (EFI_GUID));
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Record->DataRecordClass = DataRecordClass;
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Record->LogMonotonicCount = Private->GlobalMonotonicCount++;
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gRT->GetTime (&Record->LogTime, NULL);
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//
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// Insert log into the internal linked list.
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//
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LogEntry->Signature = EFI_DATA_ENTRY_SIGNATURE;
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LogEntry->Record = Record;
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LogEntry->RecordSize = sizeof (EFI_DATA_ENTRY) + RawDataSize;
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InsertTailList (&Private->DataListHead, &LogEntry->Link);
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CopyMem (Raw, RawData, RawDataSize);
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EfiReleaseLock (&Private->DataLock);
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//
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// Send Signal to all the filter drivers which are interested
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// in the record's class and guid.
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//
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Head = &Private->FilterDriverListHead;
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for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {
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FilterEntry = FILTER_ENTRY_FROM_LINK (Link);
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if (((FilterEntry->ClassFilter & DataRecordClass) != 0) &&
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(CompareGuid (&FilterEntry->FilterDataRecordGuid, &gZeroGuid) ||
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CompareGuid (&FilterEntry->FilterDataRecordGuid, DataRecordGuid))) {
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gBS->SignalEvent (FilterEntry->Event);
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}
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}
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return EFI_SUCCESS;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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DataHubGetNextRecord (
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IN EFI_DATA_HUB_PROTOCOL *This,
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IN OUT UINT64 *MonotonicCount,
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IN EFI_EVENT *FilterDriverEvent, OPTIONAL
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OUT EFI_DATA_RECORD_HEADER **Record
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)
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/*++
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Routine Description:
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Get a previously logged data record and the MonotonicCount for the next
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availible Record. This allows all records or all records later
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than a give MonotonicCount to be returned. If an optional FilterDriverEvent
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is passed in with a MonotonicCout of zero return the first record
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not yet read by the filter driver. If FilterDriverEvent is NULL and
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MonotonicCount is zero return the first data record.
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Arguments:
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This - The EFI_DATA_HUB_PROTOCOL instance.
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MonotonicCount - Specifies the Record to return. On input, zero means
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return the first record. On output, contains the next
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record to availible. Zero indicates no more records.
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FilterDriverEvent - If FilterDriverEvent is not passed in a MonotonicCount
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of zero, it means to return the first data record.
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If FilterDriverEvent is passed in, then a MonotonicCount
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of zero means to return the first data not yet read by
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FilterDriverEvent.
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Record - Returns a dynamically allocated memory buffer with a data
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record that matches MonotonicCount.
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Returns:
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EFI_SUCCESS - Data was returned in Record.
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EFI_INVALID_PARAMETER - FilterDriverEvent was passed in but does not exist.
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EFI_NOT_FOUND - MonotonicCount does not match any data record in the
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system. If a MonotonicCount of zero was passed in, then
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no data records exist in the system.
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EFI_OUT_OF_RESOURCES - Record was not returned due to lack of system resources.
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--*/
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{
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DATA_HUB_INSTANCE *Private;
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DATA_HUB_FILTER_DRIVER *FilterDriver;
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UINT64 ClassFilter;
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UINT64 FilterMonotonicCount;
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Private = DATA_HUB_INSTANCE_FROM_THIS (This);
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FilterDriver = NULL;
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FilterMonotonicCount = 0;
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ClassFilter = EFI_DATA_RECORD_CLASS_DEBUG |
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EFI_DATA_RECORD_CLASS_ERROR |
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EFI_DATA_RECORD_CLASS_DATA |
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EFI_DATA_RECORD_CLASS_PROGRESS_CODE;
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if (FilterDriverEvent != NULL) {
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//
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// For events the beginning is the last unread record. This info is
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// stored in the instance structure, so we must look up the event
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// to get the data.
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//
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FilterDriver = FindFilterDriverByEvent (
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&Private->FilterDriverListHead,
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*FilterDriverEvent
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);
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if (FilterDriver == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Use the Class filter the event was created with.
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//
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ClassFilter = FilterDriver->ClassFilter;
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if (*MonotonicCount == 0) {
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//
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// Use the MTC from the Filter Driver.
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//
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FilterMonotonicCount = FilterDriver->GetNextMonotonicCount;
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if (FilterMonotonicCount != 0) {
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//
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// The GetNextMonotonicCount field remembers the last value from the previous time.
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// But we already processed this vaule, so we need to find the next one. So if
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// It is not the first time get the new record entry.
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//
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*Record = GetNextDataRecord (&Private->DataListHead, ClassFilter, &FilterMonotonicCount);
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*MonotonicCount = FilterMonotonicCount;
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if (FilterMonotonicCount == 0) {
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//
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// If there is no new record to get exit now.
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//
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return EFI_NOT_FOUND;
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}
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}
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}
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}
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//
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// Return the record
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//
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*Record = GetNextDataRecord (&Private->DataListHead, ClassFilter, MonotonicCount);
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if (*Record == NULL) {
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return EFI_NOT_FOUND;
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}
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if (FilterDriver != NULL) {
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//
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// If we have a filter driver update the records that have been read.
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// If MonotonicCount is zero No more reacords left.
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//
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if (*MonotonicCount == 0) {
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if (FilterMonotonicCount != 0) {
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//
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// Return the result of our extra GetNextDataRecord.
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//
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FilterDriver->GetNextMonotonicCount = FilterMonotonicCount;
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}
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} else {
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//
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// Point to next undread record
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//
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FilterDriver->GetNextMonotonicCount = *MonotonicCount;
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}
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}
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return EFI_SUCCESS;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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DataHubRegisterFilterDriver (
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IN EFI_DATA_HUB_PROTOCOL * This,
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IN EFI_EVENT FilterEvent,
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IN EFI_TPL FilterTpl,
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IN UINT64 FilterClass,
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IN EFI_GUID * FilterDataRecordGuid OPTIONAL
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)
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/*++
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Routine Description:
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This function registers the data hub filter driver that is represented
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by FilterEvent. Only one instance of each FilterEvent can be registered.
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After the FilterEvent is registered, it will be signaled so it can sync
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with data records that have been recorded prior to the FilterEvent being
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registered.
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Arguments:
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This - The EFI_DATA_HUB_PROTOCOL instance.
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FilterEvent - The EFI_EVENT to signal whenever data that matches
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FilterClass is logged in the system.
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FilterTpl - The maximum EFI_TPL at which FilterEvent can be
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signaled. It is strongly recommended that you use the
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lowest EFI_TPL possible.
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FilterClass - FilterEvent will be signaled whenever a bit in
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EFI_DATA_RECORD_HEADER.DataRecordClass is also set in
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FilterClass. If FilterClass is zero, no class-based
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filtering will be performed.
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FilterDataRecordGuid - FilterEvent will be signaled whenever FilterDataRecordGuid
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matches EFI_DATA_RECORD_HEADER.DataRecordGuid. If
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FilterDataRecordGuid is NULL, then no GUID-based filtering
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will be performed.
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Returns:
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EFI_SUCCESS - The filter driver event was registered.
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EFI_ALREADY_STARTED - FilterEvent was previously registered and cannot be
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registered again.
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EFI_OUT_OF_RESOURCES - The filter driver event was not registered due to lack of
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system resources.
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--*/
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{
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DATA_HUB_INSTANCE *Private;
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DATA_HUB_FILTER_DRIVER *FilterDriver;
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Private = DATA_HUB_INSTANCE_FROM_THIS (This);
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FilterDriver = (DATA_HUB_FILTER_DRIVER *) AllocateZeroPool (sizeof (DATA_HUB_FILTER_DRIVER));
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if (FilterDriver == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// Initialize filter driver info
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//
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FilterDriver->Signature = EFI_DATA_HUB_FILTER_DRIVER_SIGNATURE;
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FilterDriver->Event = FilterEvent;
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FilterDriver->Tpl = FilterTpl;
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FilterDriver->GetNextMonotonicCount = 0;
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if (FilterClass == 0) {
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FilterDriver->ClassFilter = EFI_DATA_RECORD_CLASS_DEBUG |
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EFI_DATA_RECORD_CLASS_ERROR |
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EFI_DATA_RECORD_CLASS_DATA |
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EFI_DATA_RECORD_CLASS_PROGRESS_CODE;
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} else {
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FilterDriver->ClassFilter = FilterClass;
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}
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if (FilterDataRecordGuid != NULL) {
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CopyMem (&FilterDriver->FilterDataRecordGuid, FilterDataRecordGuid, sizeof (EFI_GUID));
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}
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//
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// Search for duplicate entries
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//
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if (FindFilterDriverByEvent (&Private->FilterDriverListHead, FilterEvent) != NULL) {
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FreePool (FilterDriver);
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return EFI_ALREADY_STARTED;
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}
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//
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// Make insertion an atomic operation with the lock.
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//
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EfiAcquireLock (&Private->DataLock);
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InsertTailList (&Private->FilterDriverListHead, &FilterDriver->Link);
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EfiReleaseLock (&Private->DataLock);
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//
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// Signal the Filter driver we just loaded so they will recieve all the
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// previous history. If we did not signal here we would have to wait until
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// the next data was logged to get the history. In a case where no next
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// data was logged we would never get synced up.
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//
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gBS->SignalEvent (FilterEvent);
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return EFI_SUCCESS;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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DataHubUnregisterFilterDriver (
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IN EFI_DATA_HUB_PROTOCOL *This,
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IN EFI_EVENT FilterEvent
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)
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/*++
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Routine Description:
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Remove a Filter Driver, so it no longer gets called when data
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information is logged.
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Arguments:
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This - Protocol instance structure
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FilterEvent - Event that represents a filter driver that is to be
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Unregistered.
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Returns:
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EFI_SUCCESS - If FilterEvent was unregistered
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EFI_NOT_FOUND - If FilterEvent does not exist
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--*/
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{
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DATA_HUB_INSTANCE *Private;
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DATA_HUB_FILTER_DRIVER *FilterDriver;
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Private = DATA_HUB_INSTANCE_FROM_THIS (This);
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//
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// Search for duplicate entries
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//
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FilterDriver = FindFilterDriverByEvent (
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&Private->FilterDriverListHead,
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FilterEvent
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);
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if (FilterDriver == NULL) {
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return EFI_NOT_FOUND;
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}
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//
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// Make removal an atomic operation with the lock
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//
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EfiAcquireLock (&Private->DataLock);
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RemoveEntryList (&FilterDriver->Link);
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EfiReleaseLock (&Private->DataLock);
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return EFI_SUCCESS;
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}
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//
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// STATIC Worker fucntions follow
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//
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STATIC
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DATA_HUB_FILTER_DRIVER *
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FindFilterDriverByEvent (
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IN LIST_ENTRY *Head,
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IN EFI_EVENT Event
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)
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/*++
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Routine Description:
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Search the Head list for a EFI_DATA_HUB_FILTER_DRIVER member that
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represents Event and return it.
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Arguments:
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Head - Head of dual linked list of EFI_DATA_HUB_FILTER_DRIVER
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structures.
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Event - Event to be search for in the Head list.
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Returns:
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EFI_DATA_HUB_FILTER_DRIVER - Returned if Event stored in the
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Head doubly linked list.
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NULL - If Event is not in the list
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--*/
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{
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DATA_HUB_FILTER_DRIVER *FilterEntry;
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LIST_ENTRY *Link;
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for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {
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FilterEntry = FILTER_ENTRY_FROM_LINK (Link);
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if (FilterEntry->Event == Event) {
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return FilterEntry;
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}
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}
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return NULL;
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}
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STATIC
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EFI_DATA_RECORD_HEADER *
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GetNextDataRecord (
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IN LIST_ENTRY *Head,
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IN UINT64 ClassFilter,
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IN OUT UINT64 *PtrCurrentMTC
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)
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/*++
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Routine Description:
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Search the Head doubly linked list for the passed in MTC. Return the
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matching element in Head and the MTC on the next entry.
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Arguments:
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Head - Head of Data Log linked list.
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ClassFilter - Only match the MTC if it is in the same Class as the
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ClassFilter.
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PtrCurrentMTC - On IN contians MTC to search for. On OUT contians next
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MTC in the data log list or zero if at end of the list.
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Returns:
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EFI_DATA_LOG_ENTRY - Return pointer to data log data from Head list.
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NULL - If no data record exists.
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--*/
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{
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EFI_DATA_ENTRY *LogEntry;
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LIST_ENTRY *Link;
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BOOLEAN ReturnFirstEntry;
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EFI_DATA_RECORD_HEADER *Record;
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EFI_DATA_ENTRY *NextLogEntry;
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//
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// If MonotonicCount == 0 just return the first one
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//
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ReturnFirstEntry = (BOOLEAN) (*PtrCurrentMTC == 0);
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Record = NULL;
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for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {
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LogEntry = DATA_ENTRY_FROM_LINK (Link);
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if ((LogEntry->Record->DataRecordClass & ClassFilter) == 0) {
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//
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// Skip any entry that does not have the correct ClassFilter
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//
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continue;
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}
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if ((LogEntry->Record->LogMonotonicCount == *PtrCurrentMTC) || ReturnFirstEntry) {
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//
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// Return record to the user
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//
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Record = LogEntry->Record;
|
|
|
|
//
|
|
// Calculate the next MTC value. If there is no next entry set
|
|
// MTC to zero.
|
|
//
|
|
*PtrCurrentMTC = 0;
|
|
for (Link = Link->ForwardLink; Link != Head; Link = Link->ForwardLink) {
|
|
NextLogEntry = DATA_ENTRY_FROM_LINK (Link);
|
|
if ((NextLogEntry->Record->DataRecordClass & ClassFilter) != 0) {
|
|
//
|
|
// Return the MTC of the next thing to search for if found
|
|
//
|
|
*PtrCurrentMTC = NextLogEntry->Record->LogMonotonicCount;
|
|
break;
|
|
}
|
|
}
|
|
//
|
|
// Record found exit loop and return
|
|
//
|
|
break;
|
|
}
|
|
}
|
|
|
|
return Record;
|
|
}
|
|
//
|
|
// Module Global:
|
|
// Since this driver will only ever produce one instance of the Logging Hub
|
|
// protocol you are not required to dynamically allocate the PrivateData.
|
|
//
|
|
DATA_HUB_INSTANCE mPrivateData;
|
|
|
|
EFI_STATUS
|
|
EFIAPI
|
|
DataHubInstall (
|
|
IN EFI_HANDLE ImageHandle,
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
Install Driver to produce Data Hub protocol.
|
|
|
|
Arguments:
|
|
(Standard EFI Image entry - EFI_IMAGE_ENTRY_POINT)
|
|
|
|
Returns:
|
|
|
|
EFI_SUCCESS - Logging Hub protocol installed
|
|
|
|
Other - No protocol installed, unload driver.
|
|
|
|
--*/
|
|
{
|
|
EFI_STATUS Status;
|
|
UINT32 HighMontonicCount;
|
|
|
|
mPrivateData.Signature = DATA_HUB_INSTANCE_SIGNATURE;
|
|
mPrivateData.DataHub.LogData = DataHubLogData;
|
|
mPrivateData.DataHub.GetNextRecord = DataHubGetNextRecord;
|
|
mPrivateData.DataHub.RegisterFilterDriver = DataHubRegisterFilterDriver;
|
|
mPrivateData.DataHub.UnregisterFilterDriver = DataHubUnregisterFilterDriver;
|
|
|
|
//
|
|
// Initialize Private Data in CORE_LOGGING_HUB_INSTANCE that is
|
|
// required by this protocol
|
|
//
|
|
InitializeListHead (&mPrivateData.DataListHead);
|
|
InitializeListHead (&mPrivateData.FilterDriverListHead);
|
|
|
|
EfiInitializeLock (&mPrivateData.DataLock, TPL_NOTIFY);
|
|
|
|
//
|
|
// Make sure we get a bigger MTC number on every boot!
|
|
//
|
|
Status = gRT->GetNextHighMonotonicCount (&HighMontonicCount);
|
|
if (EFI_ERROR (Status)) {
|
|
//
|
|
// if system service fails pick a sane value.
|
|
//
|
|
mPrivateData.GlobalMonotonicCount = 0;
|
|
} else {
|
|
mPrivateData.GlobalMonotonicCount = LShiftU64 ((UINT64) HighMontonicCount, 32);
|
|
}
|
|
//
|
|
// Make a new handle and install the protocol
|
|
//
|
|
mPrivateData.Handle = NULL;
|
|
Status = gBS->InstallProtocolInterface (
|
|
&mPrivateData.Handle,
|
|
&gEfiDataHubProtocolGuid,
|
|
EFI_NATIVE_INTERFACE,
|
|
&mPrivateData.DataHub
|
|
);
|
|
return Status;
|
|
}
|