--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/vghwinterface/vghwdriver/api/src/guestvideodriver.cpp Wed Oct 06 15:43:10 2010 +0100
@@ -0,0 +1,264 @@
+// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// Guest Video Driver Implementation
+
+#include <e32cmn.h>
+#include <e32des8.h>
+#include <e32std.h>
+#include <e32debug.h>
+
+#include <graphics/guestvideodriver.h>
+#include <graphics/guestvideodriverprotocol.h>
+#include <graphics/guestvideodriverinterfaceconstants.h>
+
+#include "remotefunctioncall.h"
+#include "serializedfunctioncall.h"
+
+// tracing
+#ifdef _DEBUG
+#include <e32debug.h>
+ #define UTIL_TRACE(fmt, args...) RDebug::Printf(fmt, ##args)
+ #define DRVRPANIC_ASSERT(condition, panic) if (!(condition)) { DriverPanic(panic, #condition, __LINE__); }
+ #define DRVRPANIC_ASSERT_DEBUG(condition, panic) if (!(condition)) { DriverPanic(panic, #condition, __LINE__); }
+#else
+ #define UTIL_TRACE(fmt, args...)
+ #define DRVRPANIC_ASSERT(condition, panic) if (!(condition)) { DriverPanic(panic, NULL, __LINE__); }
+ #define DRVRPANIC_ASSERT_DEBUG(condition, panic)
+#endif
+
+//Max supported request size
+const TUint32 KMaxRequestSize( VVI_PARAMETERS_INPUT_MEMORY_SIZE );
+
+typedef enum
+ {
+ EDriverPanicSendBufferFailed=1,
+ EDriverPanicInvalidOperationType,
+ EDriverPanicOperationDataTooBig,
+ EDriverPanicDriverAlreadyOpen,
+ EDriverPanicCreateDriverChannelFailed,
+ EDriverPanicCreateThreadLockFailed,
+ EDriverPanicSendBufferFnDoesNotHaveThreadLock,
+ EDriverPanicBufferCommandFnDoesNotHaveThreadLock,
+ EDriverPanicDriverNotOpenForExecuteCommandFn,
+ EDriverPanicRequestStatusErrorInExecuteCommandFn, // 10
+ EDriverPanicBufferWriteFailed,
+ } TDriverPanic;
+
+_LIT(KDriverPanicCategory, "Guest VidDrv");
+
+void DriverPanic(TDriverPanic aPanicCode, char* aCondition, TInt aLine)
+ {
+ UTIL_TRACE("Guest Video Driver Panic %d for failed Assert (%s), at guestvideodriver.cpp:%d", aPanicCode, aCondition, aLine);
+
+ User::Panic(KDriverPanicCategory, aPanicCode);
+ }
+
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// RGuestVideoDriver::RGuestVideoDriver
+// -----------------------------------------------------------------------------
+//
+EXPORT_C RGuestVideoDriver::RGuestVideoDriver() : iIsOpen(EFalse), iProcessId(0)
+ {
+ }
+
+// -----------------------------------------------------------------------------
+// RGuestVideoDriver::Open
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt RGuestVideoDriver::Open()
+ {
+ UTIL_TRACE("RGuestVideoDriver::Open start iProcessId=0x%x, iIsOpen=%d", iProcessId, iIsOpen);
+ DRVRPANIC_ASSERT(iIsOpen == EFalse, EDriverPanicDriverAlreadyOpen);
+ iProcessId = RProcess().Id();
+ TInt error = iThreadLock.CreateLocal(EOwnerProcess);
+ DRVRPANIC_ASSERT_DEBUG( error == KErrNone, EDriverPanicCreateThreadLockFailed);
+ if (!error)
+ {
+ error = DoCreate(
+ GuestVideoDriver::KDeviceName,
+ TVersion( GuestVideoDriver::KMajorVer,
+ GuestVideoDriver::KMinorVer,
+ GuestVideoDriver::KBuildVer ),
+ KNullUnit,
+ NULL,
+ NULL);
+ DRVRPANIC_ASSERT_DEBUG( error == KErrNone, EDriverPanicCreateDriverChannelFailed);
+ if (!error)
+ {
+ iIsOpen = ETrue;
+ }
+ }
+ UTIL_TRACE("RGuestVideoDriver::Open end iProcessId=0x%x, error=%d", iProcessId, error);
+ return error;
+ }
+
+// -----------------------------------------------------------------------------
+// RGuestVideoDriver::~RGuestVideoDriver
+// -----------------------------------------------------------------------------
+//
+EXPORT_C RGuestVideoDriver::~RGuestVideoDriver()
+ {
+ UTIL_TRACE("RGuestVideoDriver::~RGuestVideoDriver iProcessId=0x%x", iProcessId);
+ iThreadLock.Close();
+ }
+
+// -----------------------------------------------------------------------------
+// RGuestVideoDriver::ExecuteCommand
+// Syncrhonous version with local buffering
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void RGuestVideoDriver::ExecuteCommand(RemoteFunctionCallData& aRequestData)
+ {
+ DRVRPANIC_ASSERT(iIsOpen, EDriverPanicDriverNotOpenForExecuteCommandFn);
+ DRVRPANIC_ASSERT( (RemoteFunctionCallData::EOpRequestWithReply == aRequestData.Header().iOpType) ||
+ (RemoteFunctionCallData::EOpRequest == aRequestData.Header().iOpType),
+ EDriverPanicInvalidOperationType);
+
+ //Set thread and process id
+ aRequestData.SetThreadInformation(iProcessId, RThread().Id());
+ TBool sendNow = (RemoteFunctionCallData::EOpRequest != aRequestData.Header().iOpType);
+ if (!sendNow)
+ {
+ iThreadLock.Wait();
+ while (!BufferCommand(aRequestData))
+ {
+ // Flush any queued commands & retry
+ if (iBuffer.Length())
+ {
+ SendBuffer();
+ }
+ else
+ { // Too big for buffer
+ sendNow = ETrue;
+ break;
+ }
+ }
+ iThreadLock.Signal();
+ }
+
+ if (sendNow)
+ {
+ // Maintain order of operations by flushing queue
+ iThreadLock.Wait();
+ if (iBuffer.Length())
+ {
+ SendBuffer();
+ }
+ iThreadLock.Signal();
+
+ TRequestStatus status;
+ TPckg<RemoteFunctionCallData> data(aRequestData);
+ DRVRPANIC_ASSERT(data().SerialisedLength() <= KMaxRequestSize, EDriverPanicOperationDataTooBig);
+ UTIL_TRACE("RGuestVideoDriver::ExecuteCommand direct send, req length=%d", data().SerialisedLength());
+ DoRequest(GuestVideoDriver::ERequestExecuteCommand, status, (TAny*)&data);
+ User::WaitForRequest(status);
+ // status <> 0 if write of reply data failed
+ DRVRPANIC_ASSERT_DEBUG(status.Int() == KErrNone, EDriverPanicRequestStatusErrorInExecuteCommandFn);
+ }
+ }
+
+// Flush video Command buffer
+EXPORT_C void RGuestVideoDriver::Flush()
+ {
+ iThreadLock.Wait();
+ if (iIsOpen && iBuffer.Length())
+ {
+ SendBuffer();
+ }
+ iThreadLock.Signal();
+ }
+
+
+// -----------------------------------------------------------------------------
+// RGuestVideoDriver::BufferCommand
+// -----------------------------------------------------------------------------
+//
+TBool RGuestVideoDriver::BufferCommand( RemoteFunctionCallData& aRequestData )
+ {
+ DRVRPANIC_ASSERT_DEBUG(iThreadLock.IsHeld(), EDriverPanicBufferCommandFnDoesNotHaveThreadLock);
+ TBool result = EFalse;
+ SerializedFunctionCall data( aRequestData );
+
+ const TUint32 len = aRequestData.SerialisedLength();
+ const TInt alignmentAdjIndex( RemoteFunctionCallData::AlignIndex( iBuffer.Length(), 4 ) );
+
+ if ( (alignmentAdjIndex + len) < iBuffer.MaxLength() )
+ {
+ //There is enough space left on local buffer
+ iBuffer.SetLength( alignmentAdjIndex + len );
+ TPtrC8 serialisedDataPtr = iBuffer.Right( len );
+ TInt wlen = data.WriteToBuffer( const_cast<TUint8*>(serialisedDataPtr.Ptr()), len, 0 );
+ DRVRPANIC_ASSERT(wlen == len, EDriverPanicBufferWriteFailed);
+ result = ETrue;
+ }
+
+ UTIL_TRACE("RGuestVideoDriver::BufferCommand length=%d, Req len=%d, result=%d",
+ iBuffer.Length(), len, result);
+ return result;
+ }
+
+// -----------------------------------------------------------------------------
+// RGuestVideoDriver::MapToHWAddress
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt RGuestVideoDriver::MapToHWAddress( const TInt aChunkHandle, TUint32& aHWAddress )
+ {
+ TPckgBuf<TInt> handle( aChunkHandle );
+ TPckg<TUint32> address( aHWAddress );
+ return DoControl( GuestVideoDriver::ERequestMapAddress, (TAny*)&handle, (TAny*)&address );
+ }
+
+// -----------------------------------------------------------------------------
+// RGuestVideDriver::GetSurfaceBufferBaseAddress
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt RGuestVideoDriver::GetSurfaceBufferBaseAddress( TUint32& aSurfaceBufferBaseAddress )
+ {
+ TPckg<TUint32> address( aSurfaceBufferBaseAddress );
+ return DoControl( GuestVideoDriver::ERequestSurfaceBufferBaseAddress, (TAny*)&address );
+ }
+
+// -----------------------------------------------------------------------------
+// RGuestVideoDriver::EglGetSgHandles
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt RGuestVideoDriver::EglGetSgHandles( const TUint64 aId, TUint64 *aSgHandles )
+ {
+ TPckg<TUint64> sgId( aId );
+ TPckg<TUint64> sgHandles( *aSgHandles );
+ return DoControl( GuestVideoDriver::ERequestSgHandles, (TAny*)&sgId, (TAny*)&sgHandles );
+ }
+
+// -----------------------------------------------------------------------------
+// RGuestVideoDriver::SendBuffer
+// -----------------------------------------------------------------------------
+//
+void RGuestVideoDriver::SendBuffer()
+ {
+ UTIL_TRACE("RGuestVideoDriver::SendBuffer length=%d", iBuffer.Length());
+ DRVRPANIC_ASSERT_DEBUG(iThreadLock.IsHeld(), EDriverPanicSendBufferFnDoesNotHaveThreadLock);
+ TRequestStatus status;
+
+ DoRequest(GuestVideoDriver::ERequestLoadCommands, status, (TAny*)&iBuffer);
+
+ User::WaitForRequest( status );
+
+ iBuffer.Zero();
+ UTIL_TRACE("RGuestVideoDriver::SendBuffer status=%d", status.Int());
+ // Commands expecting a reply should never come through here, so status should always be KErrNone
+ DRVRPANIC_ASSERT(status.Int() == KErrNone, EDriverPanicSendBufferFailed);
+ }