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Diffstat (limited to 'vidix/dhahelperwin/dhahelper.c')
| -rw-r--r-- | vidix/dhahelperwin/dhahelper.c | 390 |
1 files changed, 0 insertions, 390 deletions
diff --git a/vidix/dhahelperwin/dhahelper.c b/vidix/dhahelperwin/dhahelper.c deleted file mode 100644 index 702f3e52c1..0000000000 --- a/vidix/dhahelperwin/dhahelper.c +++ /dev/null @@ -1,390 +0,0 @@ -/* - * direct hardware access under Windows NT/2000/XP - * - * Copyright (c) 2004 Sascha Sommer <saschasommer@freenet.de> - * Patched to compile with MinGW by Kevin Kofler: - * Copyright (c) 2007 Kevin Kofler - * - * This file is part of MPlayer. - * - * MPlayer is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * MPlayer is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with MPlayer; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - - -#if defined(_MSC_VER) -#include <ntddk.h> -#ifndef STDCALL -#define STDCALL /* nothing */ -#endif -#elif defined(__MINGW32__) -#include <ddk/ntddk.h> -#define NO_SEH /* FIXME */ -#else -#error Unsupported compiler. This driver requires MSVC+DDK or MinGW to build. -#endif - -#include "dhahelper.h" - -#define OutputDebugString DbgPrint - -#define IOPM_SIZE 0x2000 -typedef char IOPM[IOPM_SIZE]; -static IOPM *pIOPM = NULL; - - - -typedef struct { - PMDL Mdl; - PVOID SystemVirtualAddress; - PVOID UserVirtualAddress; - ULONG PhysMemSizeInBytes; -}alloc_priv; -static alloc_priv* alloclist; -static unsigned int alloccount=0; - - - - - - - -static STDCALL NTSTATUS dhahelperdispatch(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp); -static STDCALL void dhahelperunload(IN PDRIVER_OBJECT DriverObject); -static STDCALL NTSTATUS UnmapPhysicalMemory(PVOID UserVirtualAddress); -static STDCALL NTSTATUS MapPhysicalMemoryToLinearSpace(PVOID pPhysAddress,ULONG PhysMemSizeInBytes,PVOID *PhysMemLin); - -void STDCALL Ke386SetIoAccessMap(int, IOPM *); -void STDCALL Ke386QueryIoAccessMap(int, IOPM *); -void STDCALL Ke386IoSetAccessProcess(PEPROCESS, int); - - - - -//entry point -STDCALL NTSTATUS DriverEntry (IN PDRIVER_OBJECT DriverObject,IN PUNICODE_STRING RegistryPath){ - UNICODE_STRING DeviceNameUnicodeString; - UNICODE_STRING DeviceLinkUnicodeString; - NTSTATUS ntStatus; - PDEVICE_OBJECT DeviceObject = NULL; - - OutputDebugString ("dhahelper: entering DriverEntry"); - - RtlInitUnicodeString (&DeviceNameUnicodeString, L"\\Device\\DHAHELPER"); - - // Create an EXCLUSIVE device object (only 1 thread at a time - // can make requests to this device). - - ntStatus = IoCreateDevice(DriverObject,0,&DeviceNameUnicodeString,FILE_DEVICE_DHAHELPER,0,TRUE,&DeviceObject); - - if (NT_SUCCESS(ntStatus)){ - // Create dispatch points for device control, create, close. - DriverObject->MajorFunction[IRP_MJ_CREATE] = - DriverObject->MajorFunction[IRP_MJ_CLOSE] = - DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = dhahelperdispatch; - DriverObject->DriverUnload = dhahelperunload; - - // Create a symbolic link, e.g. a name that a Win32 app can specify - // to open the device. - - RtlInitUnicodeString (&DeviceLinkUnicodeString, L"\\DosDevices\\DHAHELPER"); - - ntStatus = IoCreateSymbolicLink(&DeviceLinkUnicodeString,&DeviceNameUnicodeString); - - if (!NT_SUCCESS(ntStatus)){ - // Symbolic link creation failed- note this & then delete the - // device object (it's useless if a Win32 app can't get at it). - OutputDebugString ("dhahelper: IoCreateSymbolicLink failed"); - IoDeleteDevice (DeviceObject); - } - } - else{ - OutputDebugString ("dhahelper: IoCreateDevice failed"); - } - OutputDebugString ("dhahelper: leaving DriverEntry"); - return ntStatus; -} - - -// Process the IRPs sent to this device - -static STDCALL NTSTATUS dhahelperdispatch(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp){ - PIO_STACK_LOCATION IrpStack; - ULONG dwInputBufferLength; - ULONG dwOutputBufferLength; - ULONG dwIoControlCode; - PVOID pvIOBuffer; - NTSTATUS ntStatus; - dhahelper_t dhahelper_priv; - - OutputDebugString ("dhahelper: entering dhahelperdispatch"); - - // Init to default settings - - Irp->IoStatus.Status = STATUS_SUCCESS; - Irp->IoStatus.Information = 0; - - IrpStack = IoGetCurrentIrpStackLocation(Irp); - - // Get the pointer to the input/output buffer and it's length - - pvIOBuffer = Irp->AssociatedIrp.SystemBuffer; - dwInputBufferLength = IrpStack->Parameters.DeviceIoControl.InputBufferLength; - dwOutputBufferLength = IrpStack->Parameters.DeviceIoControl.OutputBufferLength; - - switch (IrpStack->MajorFunction){ - case IRP_MJ_CREATE: - OutputDebugString("dhahelper: IRP_MJ_CREATE"); - break; - case IRP_MJ_CLOSE: - OutputDebugString("dhahelper: IRP_MJ_CLOSE"); - break; - case IRP_MJ_DEVICE_CONTROL: - OutputDebugString("dhahelper: IRP_MJ_DEVICE_CONTROL"); - dwIoControlCode = IrpStack->Parameters.DeviceIoControl.IoControlCode; - switch (dwIoControlCode){ - case IOCTL_DHAHELPER_ENABLEDIRECTIO: - OutputDebugString("dhahelper: IOCTL_DHAHELPER_ENABLEDIRECTIO"); - pIOPM = MmAllocateNonCachedMemory(sizeof(IOPM)); - if (pIOPM){ - RtlZeroMemory(pIOPM, sizeof(IOPM)); - Ke386IoSetAccessProcess(PsGetCurrentProcess(), 1); - Ke386SetIoAccessMap(1, pIOPM); - } - else Irp->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES; - break; - case IOCTL_DHAHELPER_DISABLEDIRECTIO: - OutputDebugString("dhahelper: IOCTL_DHAHELPER_DISABLEDIRECTIO"); - if (pIOPM){ - Ke386IoSetAccessProcess(PsGetCurrentProcess(), 0); - Ke386SetIoAccessMap(1, pIOPM); - MmFreeNonCachedMemory(pIOPM, sizeof(IOPM)); - pIOPM = NULL; - } - break; - case IOCTL_DHAHELPER_MAPPHYSTOLIN: - OutputDebugString("dhahelper: IOCTL_DHAHELPER_MAPPHYSTOLIN"); - if (dwInputBufferLength){ - memcpy (&dhahelper_priv, pvIOBuffer, dwInputBufferLength); - ntStatus = MapPhysicalMemoryToLinearSpace(dhahelper_priv.base,dhahelper_priv.size,&dhahelper_priv.ptr); - if (NT_SUCCESS(ntStatus)){ - memcpy (pvIOBuffer, &dhahelper_priv, dwInputBufferLength); - Irp->IoStatus.Information = dwInputBufferLength; - } - Irp->IoStatus.Status = ntStatus; - } - else Irp->IoStatus.Status = STATUS_INVALID_PARAMETER; - break; - case IOCTL_DHAHELPER_UNMAPPHYSADDR: - OutputDebugString("dhahelper: IOCTL_DHAHELPER_UNMAPPHYSADDR"); - if (dwInputBufferLength){ - memcpy (&dhahelper_priv, pvIOBuffer, dwInputBufferLength); - ntStatus = UnmapPhysicalMemory(dhahelper_priv.ptr); - Irp->IoStatus.Status = ntStatus; - } - else - Irp->IoStatus.Status = STATUS_INVALID_PARAMETER; - break; - default: - OutputDebugString("dhahelper: unknown IRP_MJ_DEVICE_CONTROL"); - Irp->IoStatus.Status = STATUS_INVALID_PARAMETER; - break; - } - break; - } - - // DON'T get cute and try to use the status field of the irp in the - // return status. That IRP IS GONE as soon as you call IoCompleteRequest. - - ntStatus = Irp->IoStatus.Status; - - IoCompleteRequest (Irp, IO_NO_INCREMENT); - - // We never have pending operation so always return the status code. - - OutputDebugString("dhahelper: leaving dhahelperdispatch"); - - return ntStatus; -} - -// Delete the associated device and return - -static STDCALL void dhahelperunload(IN PDRIVER_OBJECT DriverObject){ - UNICODE_STRING DeviceLinkUnicodeString; - NTSTATUS ntStatus=STATUS_SUCCESS; - OutputDebugString ("dhahelper: entering dhahelperunload"); - OutputDebugString ("dhahelper: unmapping remaining memory"); - - while(alloccount && (ntStatus==STATUS_SUCCESS))ntStatus = UnmapPhysicalMemory(alloclist[alloccount-1].UserVirtualAddress); - RtlInitUnicodeString (&DeviceLinkUnicodeString, L"\\DosDevices\\DHAHELPER"); - ntStatus = IoDeleteSymbolicLink (&DeviceLinkUnicodeString); - - if (NT_SUCCESS(ntStatus)){ - IoDeleteDevice (DriverObject->DeviceObject); - } - else { - OutputDebugString ("dhahelper: IoDeleteSymbolicLink failed"); - } - OutputDebugString ("dhahelper: leaving dhahelperunload"); -} - - - - - - -/************************* memory mapping functions ******************************/ -//unlike the functions of other io helpers these functions allow to map adapter memory on windows xp -//even if it has alread been mapped by the original driver -//the technique used is described in -//http://support.microsoft.com/default.aspx?scid=kb;en-us;q189327 -//furthermore it keeps a list of mapped areas to free them when the driver gets unloaded -//I'm not sure what the limitations of ZwMapViewOfSection are but mapping 128MB videoram (that is probably already mapped by the gfxcard driver) -//won't work so it is generally a good idea to map only the memory you really need - -static STDCALL NTSTATUS MapPhysicalMemoryToLinearSpace(PVOID pPhysAddress,ULONG PhysMemSizeInBytes,PVOID *PhysMemLin){ - alloc_priv* alloclisttmp; - PMDL Mdl=NULL; - PVOID SystemVirtualAddress=NULL; - PVOID UserVirtualAddress=NULL; - PHYSICAL_ADDRESS pStartPhysAddress; - OutputDebugString ("dhahelper: entering MapPhysicalMemoryToLinearSpace"); - -#ifdef _WIN64 - pStartPhysAddress.QuadPart = (ULONGLONG)pPhysAddress; -#else - pStartPhysAddress.QuadPart = (ULONGLONG)(ULONG)pPhysAddress; -#endif -#ifndef NO_SEH - __try { -#endif - SystemVirtualAddress=MmMapIoSpace(pStartPhysAddress,PhysMemSizeInBytes, /*MmWriteCombined*/MmNonCached); - if(!SystemVirtualAddress){ - OutputDebugString("dhahelper: MmMapIoSpace failed"); - return STATUS_INVALID_PARAMETER; - } - OutputDebugString("dhahelper: SystemVirtualAddress 0x%x",SystemVirtualAddress); - Mdl=IoAllocateMdl(SystemVirtualAddress, PhysMemSizeInBytes, FALSE, FALSE,NULL); - if(!Mdl){ - OutputDebugString("dhahelper: IoAllocateMdl failed"); - return STATUS_INSUFFICIENT_RESOURCES; - } - OutputDebugString("dhahelper: Mdl 0x%x",Mdl); - MmBuildMdlForNonPagedPool(Mdl); -#ifdef _WIN64 - UserVirtualAddress = (PVOID)(((ULONGLONG)PAGE_ALIGN(MmMapLockedPages(Mdl,UserMode))) + MmGetMdlByteOffset(Mdl)); -#else - UserVirtualAddress = (PVOID)(((ULONG)PAGE_ALIGN(MmMapLockedPages(Mdl,UserMode))) + MmGetMdlByteOffset(Mdl)); -#endif - if(!UserVirtualAddress){ - OutputDebugString("dhahelper: MmMapLockedPages failed"); - return STATUS_INSUFFICIENT_RESOURCES; - } - OutputDebugString("dhahelper: UserVirtualAddress 0x%x",UserVirtualAddress); -#ifndef NO_SEH - }__except(EXCEPTION_EXECUTE_HANDLER){ - NTSTATUS ntStatus; - ntStatus = GetExceptionCode(); - OutputDebugString("dhahelper: MapPhysicalMemoryToLinearSpace failed due to exception 0x%0x\n", ntStatus); - return ntStatus; - } -#endif - - - OutputDebugString("dhahelper: adding data to internal allocation list"); - alloclisttmp=MmAllocateNonCachedMemory((alloccount+1)*sizeof(alloc_priv)); - - - if(!alloclisttmp){ - OutputDebugString("dhahelper: not enough memory to create temporary allocation list"); - MmUnmapLockedPages(UserVirtualAddress, Mdl); - IoFreeMdl(Mdl); - return STATUS_INSUFFICIENT_RESOURCES; - } - if(alloccount){ - memcpy(alloclisttmp,alloclist,alloccount * sizeof(alloc_priv)); - MmFreeNonCachedMemory(alloclist,alloccount*sizeof(alloc_priv)); - } - alloclist=alloclisttmp; - alloclist[alloccount].Mdl=Mdl; - alloclist[alloccount].SystemVirtualAddress=SystemVirtualAddress; - alloclist[alloccount].UserVirtualAddress=UserVirtualAddress; - alloclist[alloccount].PhysMemSizeInBytes=PhysMemSizeInBytes; - ++alloccount; - - *PhysMemLin=UserVirtualAddress; - - OutputDebugString("dhahelper: leaving MapPhysicalMemoryToLinearSpace"); - return STATUS_SUCCESS; -} - -static STDCALL NTSTATUS UnmapPhysicalMemory(PVOID UserVirtualAddress){ - unsigned int i; - unsigned int x=0; - unsigned int alloccounttmp=alloccount; - OutputDebugString("dhahelper: entering UnmapPhysicalMemory to unmapp 0x%x",UserVirtualAddress); - if(!alloccount){ - OutputDebugString("dhahelper: UnmapPhysicalMemory: nothing todo -> leaving..."); - return STATUS_SUCCESS; - } - - for(i=0;i<alloccount;i++){ - if(alloclist[i].UserVirtualAddress!=UserVirtualAddress){ - if(x!=i){ - alloclist[x].Mdl=alloclist[i].Mdl; - alloclist[x].SystemVirtualAddress=alloclist[i].SystemVirtualAddress; - alloclist[x].UserVirtualAddress=alloclist[i].UserVirtualAddress; - alloclist[x].PhysMemSizeInBytes=alloclist[i].PhysMemSizeInBytes; - - } - x++; - } - else if(alloclist[i].UserVirtualAddress==UserVirtualAddress){ - if(x==i){ -#ifndef NO_SEH - __try { -#endif - MmUnmapLockedPages(alloclist[x].UserVirtualAddress, alloclist[x].Mdl); - IoFreeMdl(alloclist[x].Mdl); - MmUnmapIoSpace(alloclist[x].SystemVirtualAddress,alloclist[x].PhysMemSizeInBytes); -#ifndef NO_SEH - }__except(EXCEPTION_EXECUTE_HANDLER){ - NTSTATUS ntStatus; - ntStatus = GetExceptionCode(); - OutputDebugString("dhahelper: UnmapPhysicalMemory failed due to exception 0x%0x (Mdl 0x%x)\n", ntStatus,alloclist[x].Mdl); - return ntStatus; - } -#endif - } - alloccounttmp--; - } - - } - - if(alloccounttmp){ - alloc_priv* alloclisttmp; - alloclisttmp=MmAllocateNonCachedMemory(alloccounttmp*sizeof(alloc_priv)); - if(!alloclisttmp){ - OutputDebugString("dhahelper: not enough memory to create temporary allocation list"); - return STATUS_INSUFFICIENT_RESOURCES; - } - memcpy(alloclisttmp,alloclist,alloccounttmp * sizeof(alloc_priv)); - MmFreeNonCachedMemory(alloclist,alloccount*sizeof(alloc_priv)); - alloclist=alloclisttmp; - } - alloccount=alloccounttmp; - - OutputDebugString("dhahelper: leaving UnmapPhysicalMemory"); - return STATUS_SUCCESS; -} |