[janderwald] 51369: [USBEHCI_NEW] - Implement IDMAMemoryManager interface, with IDMAMemoryManager::Allocate, IDMAMemoryManager::Free - Fix interface of IDMAMemoryManager - Will be used by IUSBHardw...
Author: janderwald Date: Sat Apr 16 12:26:06 2011 New Revision: 51369
URL: http://svn.reactos.org/svn/reactos?rev=51369&view=rev Log: [USBEHCI_NEW] - Implement IDMAMemoryManager interface, with IDMAMemoryManager::Allocate, IDMAMemoryManager::Free - Fix interface of IDMAMemoryManager - Will be used by IUSBHardwareDevice
Added: branches/usb-bringup/drivers/usb/usbehci_new/memory_manager.cpp (with props) Modified: branches/usb-bringup/drivers/usb/usbehci_new/CMakeLists.txt branches/usb-bringup/drivers/usb/usbehci_new/interfaces.h branches/usb-bringup/drivers/usb/usbehci_new/usbehci.h
Modified: branches/usb-bringup/drivers/usb/usbehci_new/CMakeLists.txt URL: http://svn.reactos.org/svn/reactos/branches/usb-bringup/drivers/usb/usbehci_... ============================================================================== --- branches/usb-bringup/drivers/usb/usbehci_new/CMakeLists.txt [iso-8859-1] (original) +++ branches/usb-bringup/drivers/usb/usbehci_new/CMakeLists.txt [iso-8859-1] Sat Apr 16 12:26:06 2011 @@ -11,6 +11,7 @@ misc.cpp purecall.cpp hub_controller.cpp + memory_manager.cpp usbehci.rc)
target_link_libraries(usbehci
Modified: branches/usb-bringup/drivers/usb/usbehci_new/interfaces.h URL: http://svn.reactos.org/svn/reactos/branches/usb-bringup/drivers/usb/usbehci_... ============================================================================== --- branches/usb-bringup/drivers/usb/usbehci_new/interfaces.h [iso-8859-1] (original) +++ branches/usb-bringup/drivers/usb/usbehci_new/interfaces.h [iso-8859-1] Sat Apr 16 12:26:06 2011 @@ -253,7 +253,7 @@
virtual NTSTATUS Allocate(IN ULONG Size, OUT PVOID *OutVirtualBase, - OUT PPHYSICAL_ADDRESS *OutPhysicalAddress) = 0; + OUT PPHYSICAL_ADDRESS OutPhysicalAddress) = 0;
//-----------------------------------------------------------------------------------------
Added: branches/usb-bringup/drivers/usb/usbehci_new/memory_manager.cpp URL: http://svn.reactos.org/svn/reactos/branches/usb-bringup/drivers/usb/usbehci_... ============================================================================== --- branches/usb-bringup/drivers/usb/usbehci_new/memory_manager.cpp (added) +++ branches/usb-bringup/drivers/usb/usbehci_new/memory_manager.cpp [iso-8859-1] Sat Apr 16 12:26:06 2011 @@ -1,0 +1,339 @@ +/* + * PROJECT: ReactOS Universal Serial Bus Bulk Enhanced Host Controller Interface + * LICENSE: GPL - See COPYING in the top level directory + * FILE: drivers/usb/usbehci/memory_manager.cpp + * PURPOSE: USB EHCI device driver. + * PROGRAMMERS: + * Michael Martin (michael.martin@reactos.org) + * Johannes Anderwald (johannes.anderwald@reactos.org) + */ + +#include "usbehci.h" + +class CDMAMemoryManager : public IDMAMemoryManager +{ +public: + STDMETHODIMP QueryInterface( REFIID InterfaceId, PVOID* Interface); + + STDMETHODIMP_(ULONG) AddRef() + { + InterlockedIncrement(&m_Ref); + return m_Ref; + } + STDMETHODIMP_(ULONG) Release() + { + InterlockedDecrement(&m_Ref); + + if (!m_Ref) + { + delete this; + return 0; + } + return m_Ref; + } + + // IDMAMemoryManager interface functions + virtual NTSTATUS Initialize(IN PUSBHARDWAREDEVICE Device, IN PKSPIN_LOCK Lock, IN ULONG DmaBufferSize, IN PVOID VirtualBase, IN PHYSICAL_ADDRESS PhysicalAddress, IN ULONG DefaultBlockSize); + virtual NTSTATUS Allocate(IN ULONG Size, OUT PVOID *OutVirtualBase, OUT PPHYSICAL_ADDRESS OutPhysicalAddress); + virtual NTSTATUS Release(IN PVOID VirtualBase, IN ULONG Size); + + // constructor / destructor + CDMAMemoryManager(IUnknown *OuterUnknown){} + virtual ~CDMAMemoryManager(){} + +protected: + LONG m_Ref; + PUSBHARDWAREDEVICE m_Device; + PKSPIN_LOCK m_Lock; + LONG m_DmaBufferSize; + PVOID m_VirtualBase; + PHYSICAL_ADDRESS m_PhysicalAddress; + ULONG m_BlockSize; + + PULONG m_BitmapBuffer; + RTL_BITMAP m_Bitmap; +}; + +//---------------------------------------------------------------------------------------- +NTSTATUS +STDMETHODCALLTYPE +CDMAMemoryManager::QueryInterface( + IN REFIID refiid, + OUT PVOID* Output) +{ + return STATUS_UNSUCCESSFUL; +} + +NTSTATUS +CDMAMemoryManager::Initialize( + IN PUSBHARDWAREDEVICE Device, + IN PKSPIN_LOCK Lock, + IN ULONG DmaBufferSize, + IN PVOID VirtualBase, + IN PHYSICAL_ADDRESS PhysicalAddress, + IN ULONG DefaultBlockSize) +{ + ULONG BitmapLength; + + // + // sanity checks + // + PC_ASSERT(DmaBufferSize >= PAGE_SIZE); + PC_ASSERT(DmaBufferSize % PAGE_SIZE == 0); + PC_ASSERT(DefaultBlockSize == 32 || DefaultBlockSize == 64 || DefaultBlockSize == 128); + + // + // calculate bitmap length + // + BitmapLength = (DmaBufferSize / DefaultBlockSize) / sizeof(ULONG); + + // + // allocate bitmap buffer + // + m_BitmapBuffer = (PULONG)ExAllocatePoolWithTag(NonPagedPool, BitmapLength, TAG_USBEHCI); + if (!m_BitmapBuffer) + { + // + // no memory + // + return STATUS_INSUFFICIENT_RESOURCES; + } + + // + // initialize bitmap + // + RtlInitializeBitMap(&m_Bitmap, m_BitmapBuffer, BitmapLength); + + // + // clear all bits + // + RtlClearAllBits(&m_Bitmap); + + // + // initialize rest of memory allocator + // + m_PhysicalAddress = PhysicalAddress; + m_VirtualBase = VirtualBase; + m_DmaBufferSize = DmaBufferSize; + m_BitmapBuffer = m_BitmapBuffer; + m_Lock = Lock; + m_BlockSize = DefaultBlockSize; + + /* done */ + return STATUS_SUCCESS; +} + +NTSTATUS +CDMAMemoryManager::Allocate( + IN ULONG Size, + OUT PVOID *OutVirtualAddress, + OUT PPHYSICAL_ADDRESS OutPhysicalAddress) +{ + ULONG Length, BlockCount, FreeIndex, StartPage, EndPage; + KIRQL OldLevel; + + // + // sanity checks + // + ASSERT(Size < PAGE_SIZE); + ASSERT(KeGetCurrentIrql() == PASSIVE_LEVEL); + + // + // align request + // + Length = (Size + m_BlockSize -1) & ~(m_BlockSize -1); + + // + // sanity check + // + ASSERT(Length); + + // + // convert to block count + // + BlockCount = Length / m_BlockSize; + + // + // acquire lock + // + KeAcquireSpinLock(m_Lock, &OldLevel); + + // + // start search + // + FreeIndex = 0; + do + { + // + // search for an free index + // + FreeIndex = RtlFindClearBits(&m_Bitmap, BlockCount, FreeIndex); + + // + // check if there was a block found + // + if (FreeIndex == MAXULONG) + { + // + // no free block found + // + break; + } + + // + // check that the allocation does not spawn over page boundaries + // + StartPage = (FreeIndex * m_BlockSize); + StartPage = (StartPage != 0 ? StartPage / PAGE_SIZE : 0); + EndPage = ((FreeIndex + BlockCount) * m_BlockSize) / PAGE_SIZE; + + // + // does the request start and end on the same page + // + if (StartPage == EndPage) + { + // + // reserve block + // + RtlSetBits(&m_Bitmap, FreeIndex, BlockCount); + + // + // reserve block + // + break; + } + else + { + // + // request spawned over page boundary + // restart search on next page + // + FreeIndex = (EndPage * PAGE_SIZE) / m_BlockSize; + } + } + while(TRUE); + + // + // release lock + // + KeReleaseSpinLock(m_Lock, OldLevel); + + // + // did allocation succeed + // + if (FreeIndex == MAXULONG) + { + // + // failed to allocate block, requestor must retry + // + return STATUS_UNSUCCESSFUL; + } + + // + // return result + // + *OutVirtualAddress = (PVOID)((ULONG_PTR)m_VirtualBase + FreeIndex * m_BlockSize); + OutPhysicalAddress->QuadPart = m_PhysicalAddress.QuadPart + FreeIndex * m_BlockSize; + + // + // clear block + // + RtlZeroMemory(*OutVirtualAddress, Length); + + // + // done + // + return STATUS_SUCCESS; +} + +NTSTATUS +CDMAMemoryManager::Release( + IN PVOID VirtualAddress, + IN ULONG Size) +{ + KIRQL OldLevel; + ULONG BlockOffset = 0, BlockLength; + + // + // sanity checks + // + PC_ASSERT(VirtualAddress); + PC_ASSERT((ULONG_PTR)VirtualAddress >= (ULONG_PTR)m_VirtualBase); + PC_ASSERT((ULONG_PTR)m_VirtualBase + m_DmaBufferSize > (ULONG_PTR)m_VirtualBase); + + // + // calculate block length + // + BlockLength = ((ULONG_PTR)VirtualAddress - (ULONG_PTR)m_VirtualBase); + + // + // check if its the first block + // + if (BlockLength) + { + // + // divide by base block size + // + BlockOffset = BlockLength / m_BlockSize; + } + + // + // align length to block size + // + Size = (Size + m_BlockSize - 1) & ~(m_BlockSize - 1); + + // + // acquire lock + // + KeAcquireSpinLock(m_Lock, &OldLevel); + + // + // release buffer + // + RtlClearBits(&m_Bitmap, BlockOffset, Size); + + // + // release lock + // + KeReleaseSpinLock(m_Lock, OldLevel); + + // + // done + // + return STATUS_SUCCESS; +} + +NTSTATUS +CreateDMAMemoryManager( + PDMAMEMORYMANAGER *OutMemoryManager) +{ + CDMAMemoryManager* This; + + // + // allocate controller + // + This = new(NonPagedPool, TAG_USBEHCI) CDMAMemoryManager(0); + if (!This) + { + // + // failed to allocate + // + return STATUS_INSUFFICIENT_RESOURCES; + } + + // + // add reference count + // + This->AddRef(); + + // + // return result + // + *OutMemoryManager = (PDMAMEMORYMANAGER)This; + + // + // done + // + return STATUS_SUCCESS; +} +
Propchange: branches/usb-bringup/drivers/usb/usbehci_new/memory_manager.cpp ------------------------------------------------------------------------------ svn:eol-style = native
Modified: branches/usb-bringup/drivers/usb/usbehci_new/usbehci.h URL: http://svn.reactos.org/svn/reactos/branches/usb-bringup/drivers/usb/usbehci_... ============================================================================== --- branches/usb-bringup/drivers/usb/usbehci_new/usbehci.h [iso-8859-1] (original) +++ branches/usb-bringup/drivers/usb/usbehci_new/usbehci.h [iso-8859-1] Sat Apr 16 12:26:06 2011 @@ -62,4 +62,9 @@ // NTSTATUS CreateHubController(PHUBCONTROLLER * OutHubController);
+// +// memory_manager.cpp +// +NTSTATUS CreateDMAMemoryManager(PDMAMEMORYMANAGER *OutMemoryManager); + #endif
-
janderwald＠svn.reactos.org