kernel/eka/drivers/locmedia/dmasupport.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 26 Jan 2010 13:13:38 +0200
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permissions -rw-r--r--
Revision: 201004 Kit: 201004
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// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// e32\drivers\locmedia\dmasupport.cpp
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// 
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//
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#include <kernel/kernel.h>
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#include <kernel/cache.h>
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#include "locmedia.h"
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#include "dmasupport.h"
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#include "dmasupport.inl"
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#include "OstTraceDefinitions.h"
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#ifdef OST_TRACE_COMPILER_IN_USE
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#include "locmedia_ost.h"
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#ifdef __VC32__
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#pragma warning(disable: 4127) // disabling warning "conditional expression is constant"
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#endif
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#include "dmasupportTraces.h"
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#endif
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#define PHYSADDR_FAULT()	Kern::Fault("TLOCDRV-PHYS-ADDR",__LINE__)
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//#define __DEBUG_DMASUP__
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#ifdef __DEBUG_DMASUP__
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#define __KTRACE_DMA(p) {p;}
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#else
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#define __KTRACE_DMA(p)
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#endif
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TInt DDmaHelper::iPageSize;
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TInt DDmaHelper::iPageSizeLog2;
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TInt DDmaHelper::iPageSizeMsk;
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/******************************************************************************
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 DDmaHelper
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 ******************************************************************************/
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const TPhysAddr KPhysMemFragmented = KPhysAddrInvalid;
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TUint32 Log2(TUint32 aVal)
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	{	
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    __ASSERT_COMPILE(sizeof(TUint32) == 4);
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    TUint32 bitPos=31;
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    if(!(aVal >> 16)) {bitPos-=16; aVal<<=16;}
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    if(!(aVal >> 24)) {bitPos-=8;  aVal<<=8 ;}
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    if(!(aVal >> 28)) {bitPos-=4;  aVal<<=4 ;}
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    if(!(aVal >> 30)) {bitPos-=2;  aVal<<=2 ;}
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    if(!(aVal >> 31)) {bitPos-=1;}
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    return bitPos;
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	}
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TBool IsPowerOfTwo(TInt aNum)
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//
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// Returns ETrue if aNum is a power of two
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//
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	{
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	return (aNum != 0 && (aNum & -aNum) == aNum);
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	}
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void DDmaHelper::ResetPageLists()
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	{
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	iFragLen = 0;
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	iFragLenRemaining = 0;
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	}
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DDmaHelper::DDmaHelper()
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	{
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	OstTraceFunctionEntry0( DDMAHELPER_DDMAHELPER_ENTRY );
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	iPageSize = Kern::RoundToPageSize(1);
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	__ASSERT_ALWAYS(IsPowerOfTwo(iPageSize), PHYSADDR_FAULT());
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	iPageSizeLog2 = Log2(iPageSize);
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	iPageSizeMsk = iPageSize-1;
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	OstTraceFunctionExit0( DDMAHELPER_DDMAHELPER_EXIT );
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	}
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DDmaHelper::~DDmaHelper()
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	{
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	OstTraceFunctionEntry0( DESTRUCTOR_DDMAHELPER_ENTRY );
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	delete [] iPageArray;
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	delete [] iPageList;
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	if (iPhysicalPinObject)
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		{
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		NKern::ThreadEnterCS();
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		Kern::DestroyPhysicalPinObject(iPhysicalPinObject);
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		NKern::ThreadLeaveCS();
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		}
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	OstTraceFunctionExit0( DESTRUCTOR_DDMAHELPER_EXIT );
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	}
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/**
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Constructs the DDmaHelper object 
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@param aLength The maximum length of data mapped by this object.
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			   Should be a multiple of the page size 
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@param aMediaBlockSize The minimum amount data that the media can transfer in read / write operations
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@param aDmaAlignment The memory alignment required by the media devices DMA controller. (i.e. word aligned = 2)
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   111
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   112
@return KErrNone,if successful;
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		KErrNoMemory, if unable to create Page Array's.
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   114
*/
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   115
TInt DDmaHelper::Construct(TInt aLength, TInt aMediaBlockSize, TInt aDmaAlignment)
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   116
	{
13
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	OstTraceFunctionEntry1( DDMAHELPER_CONSTRUCT_ENTRY, this );
9
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   118
	__ASSERT_ALWAYS(aMediaBlockSize > 0, PHYSADDR_FAULT());
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	__ASSERT_ALWAYS(IsPowerOfTwo(aMediaBlockSize), PHYSADDR_FAULT());
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	__ASSERT_ALWAYS(aLength > 0, PHYSADDR_FAULT());
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   121
	__ASSERT_ALWAYS(aLength > iPageSize, PHYSADDR_FAULT());
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   122
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	// This code assumes that the media block size (normally 512) is >= the processor's 
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	// cache-line size (typically 32 bytes). This may not be true for future processors.
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	// If the cache-line size was 1024, for example,  reading 512 bytes into a client's 
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	// buffer & then calling Cache::SyncMemoryAfterDmaRead would invalidate an entire 1024 
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	// bytes in the user's address space.
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	TUint cacheLineSize = Cache::DmaBufferAlignment();
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	__ASSERT_ALWAYS(IsPowerOfTwo(cacheLineSize), PHYSADDR_FAULT());
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	if (cacheLineSize > (TUint) aMediaBlockSize)
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	    {
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		OstTraceFunctionExitExt( DDMAHELPER_CONSTRUCT_EXIT1, this, KErrNotSupported );
9
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		return KErrNotSupported;
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	    }
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   135
	
9
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	//Check whether Kernel supports physical memory pinning:
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	TInt mm = Kern::HalFunction(EHalGroupKernel, EKernelHalMemModelInfo, 0, 0) & EMemModelTypeMask;
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   138
	if (mm >= EMemModelTypeFlexible)
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   139
		{
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		// Flexible memory model supports physical pinning for user (and Kernel) memory that
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		// is the subject of DMA transfer.
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		// Physical memory pinning ensures that:
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		// - physical memory is not moved by RAM defragmentation.
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		// - it is safe to to DMA against it or do sync cache (using new interface) even if/when
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		// the owner of the memory (e.g. untrusted user aplication) decomits memory or panics.
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		// For details @see Kern::PinPhysicalMemory.
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		// Cache Sync of physically pinned memory on flexible memory model is done by:
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		//  - Cache::SyncPhysicalMemoryBeforeDmaWrite
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		//  - Cache::SyncPhysicalMemoryBeforeDmaRead
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		//  - Cache::SyncPhysicalMemoryAfterDmaRead
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		iPhysPinningAvailable = ETrue;
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		__KTRACE_DMA(Kern::Printf("Memory model (%d) supports physical pinning\n",mm));
9
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		NKern::ThreadEnterCS();
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		TInt r=Kern::CreatePhysicalPinObject(iPhysicalPinObject);
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		OstTraceExt2(TRACE_DMASUPPORT, DDMAHELPER_CONSTRUCT1, "Memory model=%d supports physical pinning; created Physical Pin Object with return value=%d",mm, r);
9
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		NKern::ThreadLeaveCS();
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   157
		if (r) return r;
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   158
		}
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   159
	else
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   160
		{
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   161
		// Memory models before flexible do not support memory pinning.
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   162
		// The driver has to use  PrepareMemoryForDMA/ReleaseMemoryFromDMA Kernel interface 
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		// that ensures that physical memory won't be moved by RAM defragmentation module.
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		// However, Kernel relies on assumption that the user memory won't dissapear (e.g. by
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   165
		// user client closing the chunk or panics), as it would lead to Kernel crash.
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   166
		// For that reason, the only use case for DMA transfer into user memory is File System's
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   167
		// read/write buffer - as it is assumed that File System is trusted component.
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   168
		// To mark its buffers(s) for DMA transfer, File Sytem must call UserSvr::RegisterTrustedChunk
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   169
		// before DMA transfer starts.
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   170
		// Cache sync. operations before/after DMA transfer must be done by using the old Cache interface:
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   171
		//  - Cache::SyncMemoryBeforeDmaWrite
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   172
		//  - Cache::SyncMemoryBeforeDmaRead
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   173
		//  - Cache::SyncMemoryAfterDmaRead
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   174
		// As they all require linear address as input, these methods also rely on File System buffers
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   175
		// to be in valid state during sync calls.
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   176
		iPhysPinningAvailable = EFalse;
13
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   177
		__KTRACE_DMA(Kern::Printf("Memory model (%d) doesn't support physical pining",mm));
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   178
		OstTrace1(TRACE_DMASUPPORT, DDMAHELPER_CONSTRUCT2, "Memory model=%d doesn't support physical pinning",mm);
9
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   179
		iPhysicalPinObject = NULL;
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   180
		}
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   181
	
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	iMaxPages = (aLength >> iPageSizeLog2)-1;
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diff changeset
   183
	
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   184
	// 2 Additional pages for page straddling
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   185
	iPageArray = new TPhysAddr[iMaxPages+2];
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   186
	if (iPageArray != NULL)
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   187
		{
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   188
		iPageList = new TPageList[iMaxPages];
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   189
		if (iPageList != NULL)
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   190
			{
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   191
			iMediaBlockSize = aMediaBlockSize;
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   192
			iMediaBlockSizeMask = TInt64(iMediaBlockSize - 1);
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diff changeset
   193
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   194
			iDmaAlignment = aDmaAlignment;
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   195
			__KTRACE_DMA(Kern::Printf("-PHYSADDR: Construct iMaxPages(%d), MediaBlocks(%d), DMAalign(%d)",iMaxPages,iMediaBlockSize,iDmaAlignment));
13
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diff changeset
   196
			OstTraceExt3(TRACE_FLOW, DDMAHELPER_CONSTRUCT_EXIT2, "< KErrNone PHYSADDR: Construct iMaxPages %d MediaBlocks %d DMAalign %d", iMaxPages,iMediaBlockSize,iDmaAlignment );
9
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   197
			return KErrNone;
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   198
			}
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   199
		delete [] iPageArray; iPageArray = NULL;
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   200
		}
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diff changeset
   201
	
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   202
	iMaxPages = 0;
13
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diff changeset
   203
	OstTraceFunctionExitExt( DDMAHELPER_CONSTRUCT_EXIT3, this, KErrNoMemory );
9
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   204
	return KErrNoMemory;
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   205
	}
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   206
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   207
/**
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   208
 * Each Read/Write request is examined to determine if the descriptor that 
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   209
 * is referenced is mapped to a physical memory object; 
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   210
 * if so it prepares the memory, updates the request with physical memory information
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diff changeset
   211
 * and issues the request.
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   212
 * If a request does not make use of physical memory or is not configured correctly the
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   213
 * request is passed through without modification.
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   214
 */
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   215
TInt DDmaHelper::SendReceive(TLocDrvRequest& aReq, TLinAddr aLinAddress)
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	{
13
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   217
	OstTraceFunctionEntry0( DDMAHELPER_SENDRECEIVE_ENTRY );
9
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	DPrimaryMediaBase& primaryMedia = *aReq.Drive()->iPrimaryMedia;
13
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   219
	
9
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	TInt reqId = aReq.Id();
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   221
	if (reqId != DLocalDrive::ERead && reqId != DLocalDrive::EWrite)
13
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   222
	    {
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   223
	    OstTrace0(TRACE_FLOW, DDMAHELPER_SENDRECEIVE_EXIT1, "< Request is not ERead or EWrite, cannot perform Direct Memory Access");
9
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   224
		return aReq.SendReceive(&primaryMedia.iMsgQ);
13
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   225
	    }
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   226
		
9
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   227
	if ((I64HIGH(aReq.Length()) > 0) || (aReq.Length() < iMediaBlockSize))
13
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   228
	    {
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   229
	    OstTrace0(TRACE_FLOW, DDMAHELPER_SENDRECEIVE_EXIT2, "< Invalid request length, cannot perform Direct Memory Access");
9
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   230
		return aReq.SendReceive(&primaryMedia.iMsgQ);
13
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   231
	    }
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   232
	
9
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   233
	// If more than one user thread tries to access the drive, then bail out as there is 
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   234
	// only one DDmaHelper object per TLocDrv. Normally this shouldn't ever happen unless
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   235
	// a client app accesses the drive directly using TBusLOcalDrive or the file system is 
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   236
	// asynchronous (i.e. there is a separate drive thread) but the file server message is 
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   237
	// flagged as synchronous - e.g. EFsDrive
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   238
	if (TInt(__e32_atomic_add_ord32(&iLockCount, 1)) > 0)	// busy ?
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   239
		{
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   240
		__KTRACE_DMA(Kern::Printf("-PHYSADDR: BUSY"));
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   241
		__e32_atomic_add_ord32(&iLockCount, TUint32(-1));
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   242
		OstTrace0(TRACE_FLOW, DDMAHELPER_SENDRECEIVE_EXIT3, "< DMA Busy");
9
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   243
		return aReq.SendReceive(&primaryMedia.iMsgQ);
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   244
		}
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   245
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   246
	// make a copy of the request 
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   247
	iMemoryType = EUnknown;
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   248
	iReq = &aReq;
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   249
	iReqId = reqId;
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   250
		
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   251
	iReqPosClient = iReq->Pos();
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   252
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   253
	iReqLenClient = I64LOW(iReq->Length());
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   254
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   255
	iReqRemoteDesOffset = iReq->RemoteDesOffset();
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   256
	iReqFlags = iReq->Flags();
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   257
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   258
	iRemoteThread = iReq->RemoteThread();
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   259
	iCurrentThread = &Kern::CurrentThread();
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   260
	iOwningThread = iRemoteThread ? iRemoteThread : iCurrentThread;
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   261
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   262
	iChunk = NULL;
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   263
	iChunkOffset = 0;
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   264
	iLinAddressUser = NULL;
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   265
	iLenConsumed = 0;
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   266
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   267
	// point to the start of the descriptor
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   268
	iLinAddressUser = aLinAddress - iReqRemoteDesOffset;
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   269
	
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   270
	// Need to check descriptors from both direct Clients (i.e. file cache, RemoteThread == NULL )
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   271
	// and Remote Server Clients (file server clients, RemoteThread != NULL)
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   272
	// Shared Memory can potentially be used by both remote server and direct clients
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   273
	NKern::ThreadEnterCS();
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   274
	iChunk = Kern::OpenSharedChunk(iOwningThread, (const TAny*) iLinAddressUser, ETrue, iChunkOffset);
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   275
	NKern::ThreadLeaveCS();
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   276
	
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   277
	TInt fragments = 0;
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   278
	TInt r;
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   279
	do
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   280
		{
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   281
		__KTRACE_DMA(Kern::Printf(">PHYSADDR:SendReceive() iReqLen %d; iLenConsumed %d; fragments %d",iReqLen, iLenConsumed, fragments));
13
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   282
		OstTraceExt2( TRACE_DMASUPPORT, DDMAHELPER_SENDRECEIVE1, "PHYSADDR:SendReceive() iLenConsumed=%d; fragments=%d", iLenConsumed, fragments);
9
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   283
		r = RequestStart();
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   284
		if (r != KErrNone)
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   285
			{
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   286
			if (iChunk)
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diff changeset
   287
				{
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   288
				NKern::ThreadEnterCS();
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diff changeset
   289
				Kern::ChunkClose(iChunk);
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   290
				iChunk = NULL;
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   291
				NKern::ThreadLeaveCS();
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   292
				}
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parents:
diff changeset
   293
			__KTRACE_DMA(Kern::Printf("<PHYSADDR:SendReceive()- r:%d",r));
13
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parents: 9
diff changeset
   294
			OstTrace1( TRACE_FLOW, DDMAHELPER_SENDRECEIVE_EXIT4, "< PHYSADDR:SendReceive() Return code %d",r);
9
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   295
			iMemoryType = EUnknown;
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parents:
diff changeset
   296
			__e32_atomic_add_ord32(&iLockCount, TUint32(-1));
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diff changeset
   297
			return fragments ? r : iReq->SendReceive(&primaryMedia.iMsgQ);
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diff changeset
   298
			}
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diff changeset
   299
		else
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parents:
diff changeset
   300
			{
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diff changeset
   301
			iReq->Flags() |= TLocDrvRequest::EPhysAddr;
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diff changeset
   302
			}
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parents:
diff changeset
   303
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diff changeset
   304
		__KTRACE_DMA(Kern::Printf("-PHYSADDR:SendReceive() rThread %08X pos %08lX, len %d addr %08X off %08X", 
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parents:
diff changeset
   305
				iRemoteThread, iReq->Pos(), I64LOW(iReq->Length()), iLinAddressUser, iReqRemoteDesOffset));
13
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parents: 9
diff changeset
   306
		OstTraceExt4(TRACE_DMASUPPORT, DDMAHELPER_SENDRECEIVE2, "PHYSADDR:SendReceive() position=%Ld; length=%d; address=0x%x; offset=0x%x", iReq->Pos(), (TInt) I64LOW(iReq->Length()), (TUint) iLinAddressUser, (TUint) iReqRemoteDesOffset );
9
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parents:
diff changeset
   307
		
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parents:
diff changeset
   308
		__ASSERT_DEBUG(iReq->Length() == FragLength(), PHYSADDR_FAULT());
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parents:
diff changeset
   309
		__ASSERT_DEBUG(iReq->Length() != 0, PHYSADDR_FAULT());
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parents:
diff changeset
   310
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   311
		// reinstate iValue in case overwritten by DMediaPagingDevice::CompleteRequest()
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parents:
diff changeset
   312
		iReq->iValue = iReqId;
13
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parents: 9
diff changeset
   313
		
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parents: 9
diff changeset
   314
		OstTrace1(TRACE_DMASUPPORT, DDMAHELPER_SENDRECEIVE3, "Dma SendReceive Start iReq=%d", iReq);
9
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parents:
diff changeset
   315
		r = iReq->SendReceive(&primaryMedia.iMsgQ);
13
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parents: 9
diff changeset
   316
		OstTrace1(TRACE_DMASUPPORT, DDMAHELPER_SENDRECEIVE4, "Dma SendReceive Return iReq=%d", iReq);
9
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parents:
diff changeset
   317
		
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parents:
diff changeset
   318
		// The media driver could potentially choose to deal with the request 
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parents:
diff changeset
   319
		// without accessing physical memory (e.g. if the data is already cached).
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   320
		iLenConsumed += iFragLenRemaining;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   321
				
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   322
		RequestEnd();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   323
		
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   324
		ResetPageLists();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   325
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   326
		fragments++;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   327
		
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   328
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   329
	while(r == KErrNone && LengthRemaining() > 0);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   330
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   331
	if (iChunk)		
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   332
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   333
		NKern::ThreadEnterCS();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   334
		Kern::ChunkClose(iChunk);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   335
		iChunk = NULL;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   336
		NKern::ThreadLeaveCS();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   337
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   338
	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   339
	// Set remote descriptor length to iReqLenClient
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   340
	if (iReqId == DLocalDrive::ERead && r == KErrNone)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   341
		r = UpdateRemoteDescriptorLength(iReqLenClient);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   342
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   343
	__KTRACE_DMA(Kern::Printf("<PHYSADDR:SendReceive()"));
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   344
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   345
	iMemoryType = EUnknown;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   346
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   347
	__e32_atomic_add_ord32(&iLockCount, TUint32(-1));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   348
	OstTraceFunctionExit0( DDMAHELPER_SENDRECEIVE_EXIT5 );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   349
	return r;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   350
	}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   351
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   352
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   353
/**
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   354
 * Each read/write request is split into one or more DMA "fragments".
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   355
 * The maximum size of each fragment depends on the size of iPageArray[].
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   356
 * Subsquent calls to RequestStart maybe required to complete a request.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   357
 * 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   358
 * The physical address is checked for DMA alignment or the possibility of 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   359
 * eventually alignment due to mis-aligned start/end media blocks.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   360
 * 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   361
 * A DMA "fragment" can be split over a number of pages as follows :
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   362
 * ----------------------------------------------------------
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   363
 * |    4K    |    4K    |    4K    |    4K    |
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   364
 * ----------------------------------------------------------
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   365
 *      ********************************		: region to be read
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   366
 * <----------- iFragLen ----------->
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   367
 * 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   368
 * The pages may not be physically contiguous; if they are not, 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   369
 * then they are supplied to the media driver one contiguous 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   370
 * sequent at a time by GetPhysicalAddress()
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   371
 **/
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   372
TInt DDmaHelper::RequestStart()
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   373
	{
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   374
	OstTraceFunctionEntry1( DDMAHELPER_REQUESTSTART_ENTRY, this );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   375
	__KTRACE_DMA(Kern::Printf(">PHYSADDR:RequestStart()"));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   376
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   377
	iIndex = 0;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   378
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   379
	TLinAddr startAddr = LinAddress();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   380
	TInt64 startPos = iReqPosClient + iLenConsumed;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   381
	TInt mediaBlockOffset = BlockOffset(startPos);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   382
	TInt addrBlockOffset = BlockOffset(startAddr);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   383
	TInt length = Min(LengthRemaining(), MaxFragLength());
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   384
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   385
	iPageArrayCount = iPageListCount = 0;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   386
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   387
	TLinAddr firstPageStart = PageAlign(startAddr);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   388
	TLinAddr lastPageStart = PageAlign(startAddr + length + iPageSize - 1);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   389
	iPageArrayCount = (lastPageStart - firstPageStart + 1) >> iPageSizeLog2;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   390
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   391
	iMemoryType = EUnknown;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   392
	iPhysAddr = KPhysMemFragmented; // Default - Mark memory as fragmented
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   393
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   394
	//*************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   395
	// Check Physical Page Alignment!!	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   396
	//*************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   397
	if (!IsBlockAligned(startPos))
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   398
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   399
		// Will DMA align at next block alignment? such that DMA can be used
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   400
		TInt ofset = I64LOW((startPos + iMediaBlockSize) & (iMediaBlockSize-1));
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   401
		ofset = iMediaBlockSize - ofset;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   402
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   403
		if (!IsDmaAligned(startAddr))
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   404
			{			
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   405
			__KTRACE_DMA(Kern::Printf("<PHYSADDR:RequestStart() - not DMA Aligned pos 0x%x addr 0x%x)",I64LOW(startPos), startAddr));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   406
			OstTraceExt2( TRACE_FLOW, DDMAHELPER_REQUESTSTART_EXIT1, "< KErrNotSupported Not DMA Aligned startPos %x startAddr %x", I64LOW(startPos), startAddr );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   407
			return KErrNotSupported;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   408
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   409
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   410
	else 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   411
		{ //block aligned!
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   412
		if (!IsDmaAligned(startAddr))
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   413
			{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   414
			__KTRACE_DMA(Kern::Printf("<PHYSADDR:RequestStart() - not DMA Aligned (0x%x)",startAddr));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   415
			OstTrace1(TRACE_FLOW, DDMAHELPER_REQUESTSTART_EXIT2, "< KErrNotSupported Not DMA Aligned startAddr %x", startAddr);
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   416
			return KErrNotSupported;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   417
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   418
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   419
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   420
	//************************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   421
	// Check for possible striping of RAM pages vs Media blocks
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   422
	// i.e. Media blocks which may straddle 2 non contiguous pages. 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   423
	//************************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   424
	if (mediaBlockOffset != addrBlockOffset)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   425
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   426
		__KTRACE_DMA(Kern::Printf("<PHYSADDR:RequestStart() - Frag / not block aligned: pos 0x%x addr 0x%x", I64LOW(startPos), startAddr));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   427
		OstTraceExt2(TRACE_FLOW, DDMAHELPER_REQUESTSTART_EXIT3, "< KErrNotSupported Frag / not block aligned: startPos 0x%x startAddr 0x%x", I64LOW(startPos), startAddr );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   428
		return KErrNotSupported;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   429
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   430
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   431
	//************************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   432
	// Is it File Server Cache request ?
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   433
	//************************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   434
	if (iChunk == NULL &&				// Not Shared memory
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   435
		iRemoteThread == NULL &&		// Direct Client Request
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   436
		IsPageAligned(startAddr) &&
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   437
		IsBlockAligned(startPos) &&
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   438
		(iPageArrayCount > 0) )
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   439
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   440
		TLinAddr firstPageAddr = PageAlign(startAddr); //ensure that it is page aligned.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   441
		
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   442
		TInt r = KErrNone;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   443
		if (iPhysPinningAvailable)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   444
			{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   445
			TBool readOnlyMem = (iReqId == DLocalDrive::EWrite); 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   446
			r =  Kern::PinPhysicalMemory(iPhysicalPinObject,  firstPageAddr, iPageArrayCount << iPageSizeLog2,
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   447
					readOnlyMem, iPhysAddr, iPageArray, iMapAttr, iPageColour, iCurrentThread);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   448
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   449
		else
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   450
			{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   451
			NKern::ThreadEnterCS();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   452
			r = Kern::PrepareMemoryForDMA(iCurrentThread, (void*)firstPageAddr, iPageArrayCount << iPageSizeLog2, iPageArray);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   453
			NKern::ThreadLeaveCS();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   454
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   455
		if (r != KErrNone) 
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   456
		    {
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   457
			OstTraceFunctionExitExt( DDMAHELPER_REQUESTSTART_EXIT4, this, r );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   458
			return r;
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   459
		    }
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   460
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   461
		iMemoryType = EFileServerChunk;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   462
		
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   463
		__KTRACE_DMA(Kern::Printf("-PHYSADDR:RequestStart() - EFileServerChunk"));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   464
		OstTrace0( TRACE_DMASUPPORT, DDMAHELPER_REQUESTSTART1, "EFileServerChunk");
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   465
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   466
	//****************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   467
	// Is it shared chunk ?
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   468
	//****************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   469
	else if (iChunk)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   470
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   471
		// calculate chunk offset of start of first page
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   472
		TInt offset = iChunkOffset + iReqRemoteDesOffset+ iLenConsumed;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   473
				
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   474
		TInt r = Kern::ChunkPhysicalAddress(iChunk, offset, length, iLinAddressKernel, iMapAttr, iPhysAddr, iPageArray);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   475
		
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   476
		if (r < KErrNone)
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   477
		    {
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   478
			OstTraceFunctionExitExt( DDMAHELPER_REQUESTSTART_EXIT5, this, r );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   479
			return r;  // 0 = Contiguous Memory, 1 = Fragmented/Dis-Contiguous Memory
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   480
		    }
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   481
			
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   482
		iMemoryType = ESharedChunk;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   483
		
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   484
		__KTRACE_DMA(Kern::Printf("-PHYSADDR:RequestStart() - ESharedChunk"));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   485
		OstTrace0( TRACE_DMASUPPORT, DDMAHELPER_REQUESTSTART2, "ESharedChunk");
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   486
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   487
	else
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   488
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   489
		__KTRACE_DMA(Kern::Printf("<PHYSADDR:RequestStart() - EUnknown"));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   490
		OstTraceFunctionExitExt( DDMAHELPER_REQUESTSTART_EXIT6, this, KErrNotFound );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   491
		return KErrNotFound;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   492
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   493
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   494
	SetFragLength(length);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   495
	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   496
	//************************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   497
	// Build Contiguous Page list
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   498
	//************************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   499
	BuildPageList();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   500
	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   501
	//************************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   502
	// Set up request parameters for this fragment 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   503
	//************************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   504
	iReq->Length() = MAKE_TINT64(0, length);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   505
	iReq->Pos() = iReqPosClient + iLenConsumed;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   506
	iReq->RemoteDesOffset() = iReqRemoteDesOffset + iLenConsumed;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   507
	// restore EAdjusted flag to ensure iReq->Pos() is adjusted correctly
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   508
	iReq->Flags()&= ~TLocDrvRequest::EAdjusted;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   509
	iReq->Flags()|= (iReqFlags & TLocDrvRequest::EAdjusted);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   510
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   511
	//************************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   512
	// Sync memory
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   513
	//************************************************
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   514
	__KTRACE_DMA(Kern::Printf(">SYNC-PHYSADDR:addr 0x%x len %d", startAddr, length));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   515
	OstTraceExt2(TRACE_DMASUPPORT, DDMAHELPER_REQUESTSTART3, "startAddr=0x%x length=%d", (TUint) startAddr, length );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   516
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   517
	// Only sync whole blocks: it is assumed that the media driver will transfer 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   518
	// partial start and end blocks without DMA
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   519
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   520
	TInt startBlockPartialLen = IsBlockAligned(startPos) ? 0 : iMediaBlockSize - BlockOffset(startPos);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   521
	TInt blockLen = (TInt) BlockAlign(length - startBlockPartialLen);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   522
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   523
	if (iReqId == DLocalDrive::EWrite)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   524
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   525
		if (iMemoryType == ESharedChunk)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   526
			{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   527
			Cache::SyncMemoryBeforeDmaWrite(iLinAddressKernel+startBlockPartialLen, blockLen, iMapAttr);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   528
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   529
		else // (iMemoryType == EFileServerChunk)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   530
			{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   531
			if (iPhysPinningAvailable)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   532
				Cache::SyncPhysicalMemoryBeforeDmaWrite(iPageArray, iPageColour, startBlockPartialLen, blockLen, iMapAttr);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   533
			else
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   534
				Cache::SyncMemoryBeforeDmaWrite(startAddr+startBlockPartialLen, blockLen);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   535
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   536
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   537
	else
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   538
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   539
		if (iMemoryType == ESharedChunk)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   540
			Cache::SyncMemoryBeforeDmaRead(iLinAddressKernel, length, iMapAttr);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   541
		else // (iMemoryType == EFileServerChunk)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   542
			{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   543
			if (iPhysPinningAvailable)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   544
				Cache::SyncPhysicalMemoryBeforeDmaRead(iPageArray, iPageColour, 0, length, iMapAttr);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   545
			else
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   546
				Cache::SyncMemoryBeforeDmaRead(startAddr, length);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   547
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   548
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   549
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   550
	__KTRACE_DMA(Kern::Printf("<PHYSADDR:RequestStart()"));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   551
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   552
	OstTraceFunctionExitExt( DDMAHELPER_REQUESTSTART_EXIT7, this, KErrNone );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   553
	return KErrNone;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   554
	}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   555
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   556
/**
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   557
 * After read requests this method synchronous the current physical memory in use.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   558
 */
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   559
void DDmaHelper::RequestEnd()
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   560
	{
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   561
	OstTraceFunctionEntry0( DDMAHELPER_REQUESTEND_ENTRY );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   562
	__KTRACE_DMA(Kern::Printf(">PHYSADDR:RequestEnd()"));
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   563
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   564
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   565
	__ASSERT_DEBUG(iReqId == DLocalDrive::ERead || iReqId == DLocalDrive::EWrite, PHYSADDR_FAULT());
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   566
	__ASSERT_DEBUG(iMemoryType == ESharedChunk || iMemoryType == EFileServerChunk, PHYSADDR_FAULT());
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   567
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   568
	TInt length = FragLength();	// len of data just transferred
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   569
	TLinAddr startAddr = LinAddress() - length;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   570
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   571
	// Sync the memory : but not if the media driver has decided to transfer ALL the data using IPC rather than DMA.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   572
	// It is assumed that the media driver will transfer partial start & end blocks using IPC, but it may also choose 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   573
	// to use IPC for the ENTIRE fragment when read/writing at the end of the media (see medmmc.cpp)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   574
	if (iFragLenRemaining < length && iReqId == DLocalDrive::ERead)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   575
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   576
		TInt64 startPos = iReq->Pos();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   577
		TInt startBlockPartialLen = IsBlockAligned(startPos) ? 0 : iMediaBlockSize - BlockOffset(startPos);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   578
		TInt blockLen = (TInt) BlockAlign(length - startBlockPartialLen);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   579
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   580
		if (iMemoryType == ESharedChunk)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   581
			{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   582
			Cache::SyncMemoryAfterDmaRead(iLinAddressKernel + startBlockPartialLen, blockLen);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   583
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   584
		else // (iMemoryType == EFileServerChunk)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   585
			{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   586
			if (iPhysPinningAvailable)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   587
				Cache::SyncPhysicalMemoryAfterDmaRead(iPageArray, iPageColour, startBlockPartialLen, blockLen, iMapAttr);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   588
			else
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   589
				Cache::SyncMemoryAfterDmaRead(startAddr + startBlockPartialLen, blockLen);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   590
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   591
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   592
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   593
	ReleasePages(PageAlign(startAddr));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   594
	OstTraceFunctionExit0( DDMAHELPER_REQUESTEND_EXIT );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   595
	}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   596
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   597
/**
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   598
 * For File Server chunks this method releases the current physical memory in use.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   599
 * 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   600
 * @see Kern::ReleaseMemoryFromDMA()
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   601
 */
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   602
void DDmaHelper::ReleasePages(TLinAddr aAddr)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   603
	{
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   604
	OstTraceFunctionEntry1( DDMAHELPER_RELEASEPAGES_ENTRY, this );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   605
	if (iMemoryType == EFileServerChunk)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   606
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   607
		__KTRACE_DMA(Kern::Printf(">PHYSADDR():ReleasePages thread (0x%x) aAddr(0x%08x) size(%d) iPageArray(0x%x)",iCurrentThread, aAddr, (iPageArrayCount << iPageSizeLog2), iPageArray));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   608
		OstTraceExt3( TRACE_DMASUPPORT, DDMAHELPER_RELEASEPAGES, "ReleasePages aAddr=0x%x; size=%d; iPageArray-0x%x", (TUint) aAddr, (iPageArrayCount << iPageSizeLog2), (TUint) iPageArray);
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   609
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   610
		TInt r;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   611
		if (iPhysPinningAvailable)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   612
			{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   613
			r = Kern::UnpinPhysicalMemory(iPhysicalPinObject);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   614
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   615
		else
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   616
			{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   617
			NKern::ThreadEnterCS();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   618
			r = Kern::ReleaseMemoryFromDMA(iCurrentThread, (void*) aAddr, iPageArrayCount << iPageSizeLog2, iPageArray);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   619
			NKern::ThreadLeaveCS();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   620
			}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   621
		__ASSERT_ALWAYS(r == KErrNone, PHYSADDR_FAULT());
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   622
		}		
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   623
	OstTraceFunctionExit1( DDMAHELPER_RELEASEPAGES_EXIT, this );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   624
	}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   625
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   626
/**
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   627
 * Utility method which examines the page array, compiling adjacent pages into contiguous fragments
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   628
 * and populating iPageList with said fragments.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   629
 */
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   630
void DDmaHelper::BuildPageList()
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   631
	{
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   632
	OstTraceFunctionEntry1( DDMAHELPER_BUILDPAGELIST_ENTRY, this );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   633
	iPageListCount = 0;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   634
	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   635
	if (iPhysAddr != KPhysMemFragmented)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   636
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   637
		__KTRACE_DMA(Kern::Printf(">PHYSADDR:BuildPageList() - Contiguous Memory"));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   638
		OstTrace0( TRACE_DMASUPPORT, DDMAHELPER_BUILDPAGELIST1, "Contiguous Memory");
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   639
		// Only one entry required.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   640
		iPageList[0].iAddress = iPhysAddr;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   641
		iPageList[0].iLength = FragLength();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   642
		iPageListCount = 1;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   643
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   644
	else
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   645
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   646
		__KTRACE_DMA(Kern::Printf(">PHYSADDR:BuildPageList() - Dis-Contiguous Memory"));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   647
		OstTrace0( TRACE_DMASUPPORT, DDMAHELPER_BUILDPAGELIST2, "Dis-Contiguous Memory");
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   648
		TInt offset;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   649
		
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   650
		offset = PageOffset(iChunkOffset + iReqRemoteDesOffset+ iLenConsumed);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   651
		iPageList[0].iAddress = iPageArray[0]+offset;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   652
		iPageList[0].iLength  = iPageSize-offset;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   653
		
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   654
		TInt lengthRemaining = FragLength() - iPageList[0].iLength;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   655
		
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   656
		TInt i =1;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   657
        for( ; i < iPageArrayCount; i++)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   658
            {
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   659
            //Check if RAM pages are physically adjacent
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   660
            if ((iPageArray[i-1] + PageSize()) == iPageArray[i])
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   661
                {
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   662
                // Adjacent pages - just add length
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   663
                iPageList[iPageListCount].iLength += PageSize();             
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   664
                }
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   665
            else     	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   666
                {
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   667
                // Not Adjacent, start new Memory fragment
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   668
                iPageListCount++;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   669
                iPageList[iPageListCount].iAddress = iPageArray[i];
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   670
                iPageList[iPageListCount].iLength  = iPageSize;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   671
                }
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   672
            
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   673
            lengthRemaining -= PageSize();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   674
            if (lengthRemaining < 0)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   675
            	{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   676
            	// Last page, re-adjust length for odd remainder.            	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   677
            	iPageList[iPageListCount].iLength += lengthRemaining;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   678
            	break;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   679
            	}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   680
            }
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   681
        
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   682
        iPageListCount++;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   683
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   684
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   685
//#ifdef __DEBUG_DMASUP__
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   686
//	for (TInt m=0; m<iPageListCount; m++)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   687
//		__KTRACE_DMA(Kern::Printf("-PHYSADDR:BuildPageList() [%d]: %08X l:%d", m, iPageList[m].iAddress, iPageList[m].iLength));
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   688
//#endif
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   689
	OstTraceFunctionExit1( DDMAHELPER_BUILDPAGELIST_EXIT, this );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   690
	}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   691
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   692
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   693
/**
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   694
 * Returns Address and Length of next contiguous Physical memory fragment
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   695
 * 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   696
 * @param aAddr On success, populated with the Physical Address of the next fragment.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   697
 * @param aLen  On success, populated with the length in bytes of the next fragment.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   698
 * 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   699
 * @return KErrNone, if successful;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   700
 * 		   KErrNoMemory, if no more memory fragments left.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   701
 */
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   702
TInt DDmaHelper::GetPhysicalAddress(TPhysAddr& aAddr, TInt& aLen)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   703
	{
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   704
	OstTraceFunctionEntry1( DUP1_DDMAHELPER_GETPHYSICALADDRESS_ENTRY, this );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   705
	if (iIndex >= iPageListCount)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   706
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   707
		__KTRACE_DMA(Kern::Printf(">PHYSADDR:GetPhysD() [%d], PageListCount:%d", iIndex, iPageListCount));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   708
		OstTraceExt2(TRACE_DMASUPPORT, DDMAHELPER_GETPHYSICALADDRESS1, "GetPhysD() [%d]; iPageCountList=%d", iIndex, iPageListCount );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   709
		aAddr = 0;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   710
		aLen = 0;
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   711
		OstTraceFunctionExitExt( DUP1_DDMAHELPER_GETPHYSICALADDRESS_EXIT1, this, KErrGeneral );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   712
		return KErrGeneral;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   713
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   714
	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   715
	aAddr = iPageList[iIndex].iAddress;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   716
	aLen = iPageList[iIndex].iLength;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   717
	iLenConsumed+= aLen;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   718
	iFragLenRemaining-= aLen;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   719
	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   720
	__KTRACE_DMA(Kern::Printf(">PHYSADDR:GetPhysD() [%d] addr:0x%08X, l:%d; Used:%d, Left:%d", iIndex, aAddr, aLen, iLenConsumed, iFragLenRemaining));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   721
	OstTraceExt5(TRACE_DMASUPPORT, DDMAHELPER_GETPHYSICALADDRESS2, "GetPhysD() [%d]; address=0x%x; length=%d; iLenConsumed=%d; iFragLenRemaining=%d", iIndex, (TUint) aAddr, aLen, iLenConsumed, iFragLenRemaining);
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   722
	__ASSERT_DEBUG(aLen >= 0, PHYSADDR_FAULT());
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   723
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   724
	iIndex++;  //Move index to next page
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   725
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   726
	OstTraceFunctionExitExt( DDMAHELPER_GETPHYSICALADDRESS_EXIT2, this, KErrNone );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   727
	return KErrNone;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   728
	}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   729
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   730
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   731
#ifdef __DEMAND_PAGING__
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   732
/**
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   733
 * Returns Address and Length of next contiguous Physical memory. 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   734
 * Static function specifically for Demand Paging support
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   735
 * 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   736
 * @param aReq  TLocDrvRequest from which physical 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   737
 * @param aAddr Populated with the Physical Address of the Request aReq.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   738
 * @param aLen  Populated with the length in bytes of the memory.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   739
 * 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   740
 * @return KErrNone 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   741
 */
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   742
TInt DDmaHelper::GetPhysicalAddress(TLocDrvRequest& aReq, TPhysAddr& aAddr, TInt& aLen)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   743
	{
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   744
	OstTraceFunctionEntry0( DDMAHELPER_GETPHYSICALADDRESS_ENTRY );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   745
	__ASSERT_DEBUG( (aReq.Flags() & TLocDrvRequest::ETClientBuffer) == 0,  PHYSADDR_FAULT());
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   746
	TLinAddr linAddr = (TLinAddr) aReq.RemoteDes();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   747
	TInt& offset = aReq.RemoteDesOffset();
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   748
	TLinAddr currLinAddr = linAddr + offset;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   749
	TInt reqLen = I64LOW(aReq.Length());
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   750
	__ASSERT_DEBUG(I64HIGH(aReq.Length()) == 0,  PHYSADDR_FAULT());
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   751
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   752
	aAddr = Epoc::LinearToPhysical(currLinAddr);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   753
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   754
	// Set the initial length to be the length remaining in this page or the request length (whichever is shorter).
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   755
	// If there are subsequent pages, we then need to determine whether they are contiguous
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   756
	aLen = Min( (TInt) (PageAlign(currLinAddr+iPageSize) - currLinAddr), reqLen - offset);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   757
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   758
	__ASSERT_DEBUG(aLen > 0,  PHYSADDR_FAULT());
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   759
	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   760
	TPhysAddr currPhysPageAddr = PageAlign((TLinAddr) aAddr);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   761
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   762
	offset+= aLen;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   763
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   764
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   765
	while (offset < reqLen)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   766
		{
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   767
		TPhysAddr nextPhysPageAddr = Epoc::LinearToPhysical(linAddr + offset);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   768
		__ASSERT_DEBUG(PageOffset((TLinAddr) nextPhysPageAddr) == 0,  PHYSADDR_FAULT());
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   769
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   770
		if (nextPhysPageAddr != currPhysPageAddr + iPageSize)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   771
			break;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   772
		
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   773
		currPhysPageAddr = nextPhysPageAddr;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   774
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   775
		TInt len = Min(iPageSize, reqLen - offset);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   776
		offset+= len;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   777
		aLen+= len;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   778
		}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   779
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   780
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   781
	__KTRACE_DMA(Kern::Printf(">PHYSADDR:DP:GetPhysS(), linAddr %08X, physAddr %08X, len %x reqLen %x", linAddr + offset, aAddr, aLen, reqLen));
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   782
	OstTraceExt4(TRACE_DEMANDPAGING, DDMAHELPER_GETPHYSICALADDRESS_DP, "linAddr=0x%x; physAddr=0x%x; length=0x%x; reqLen=0x%x", linAddr + offset, aAddr, aLen, reqLen);
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   783
	OstTraceFunctionExit0( DDMAHELPER_GETPHYSICALADDRESS_EXIT );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   784
	return KErrNone;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   785
	}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   786
#endif	// (__DEMAND_PAGING__)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   787
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   788
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   789
/**
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   790
 * Modifies the current requests remote descriptor length
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   791
 * 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   792
 * @param aLength Length in bytes to which the descriptor is to be set.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   793
 * 
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   794
 * @return KErrNone, if successful;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   795
 * 		   KErrBadDescriptor, if descriptor is corrupted;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   796
 * 		   otherwise one of the other system wide error codes.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   797
 */
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   798
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   799
TInt DDmaHelper::UpdateRemoteDescriptorLength(TInt aLength)
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   800
	{
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   801
	OstTraceFunctionEntryExt( DDMAHELPER_UPDATEREMOTEDESCRIPTORLENGTH_ENTRY, this );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   802
	__KTRACE_DMA(Kern::Printf(">PHYSADDR:UpDesLen(%d)",aLength));
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   803
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   804
	// Restore request Id (overwritten by KErrNone return code) to stop ASSERT in WriteRemote
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   805
	iReq->Id() = DLocalDrive::ERead;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   806
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   807
	// restore caller's descriptor offset
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   808
	iReq->RemoteDesOffset() = iReqRemoteDesOffset;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   809
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   810
	// Write a zero length descriptor at the end such that the descriptors length is correctly updated.
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   811
	TPtrC8 zeroDes(NULL, 0);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   812
	TInt r = iReq->WriteRemote(&zeroDes, aLength);
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   813
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   814
	// restore return code	
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   815
	iReq->iValue = KErrNone;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   816
13
46fffbe7b5a7 Revision: 201004
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 9
diff changeset
   817
	OstTraceFunctionExitExt( DDMAHELPER_UPDATEREMOTEDESCRIPTORLENGTH_EXIT, this, r );
9
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   818
	return r;
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   819
	}
96e5fb8b040d Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   820