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/* $Id: D3DKMT.cpp $ */
/** @file
* WDDM Kernel Mode Thunks helpers.
*/
/*
* Copyright (C) 2018-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program 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, in version 3 of the
* License.
*
* This program 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 this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/* We're unable to use standard r3 vbgl-based backdoor logging API because win8 Metro apps
* can not do CreateFile/Read/Write by default.
* This is why we use miniport escape functionality to issue backdoor log string to the miniport
* and submit it to host via standard r0 backdoor logging api accordingly
*/
#include "UmHlpInternal.h"
/** Loads a system DLL.
*
* @returns Module handle or NULL
* @param pszName The DLL name.
*/
DECLCALLBACK(HMODULE) VBoxWddmLoadSystemDll(const char *pszName)
{
char szPath[MAX_PATH];
UINT cchPath = GetSystemDirectoryA(szPath, sizeof(szPath));
size_t cbName = strlen(pszName) + 1;
if (cchPath + 1 + cbName > sizeof(szPath))
{
SetLastError(ERROR_FILENAME_EXCED_RANGE);
return NULL;
}
szPath[cchPath] = '\\';
memcpy(&szPath[cchPath + 1], pszName, cbName);
return LoadLibraryA(szPath);
}
DECLCALLBACK(void) VBoxWddmLoadAdresses(HMODULE hmod, VBOXWDDMDLLPROC *paProcs)
{
struct VBOXWDDMDLLPROC *pIter = paProcs;
while (pIter->pszName)
{
FARPROC pfn = GetProcAddress(hmod, pIter->pszName);
*pIter->ppfn = pfn;
++pIter;
}
}
/*
* Kernel Mode Thunks (KMT) initialization.
*/
#define D3DKMT_LOAD_ENTRY(a) { #a, (FARPROC *)&g_D3DKMT.pfn##a }
static D3DKMTFUNCTIONS g_D3DKMT = { 0 };
static VBOXWDDMDLLPROC g_D3DKMTLoadTable[] =
{
D3DKMT_LOAD_ENTRY(D3DKMTOpenAdapterFromHdc),
D3DKMT_LOAD_ENTRY(D3DKMTOpenAdapterFromDeviceName),
D3DKMT_LOAD_ENTRY(D3DKMTCloseAdapter),
D3DKMT_LOAD_ENTRY(D3DKMTQueryAdapterInfo),
D3DKMT_LOAD_ENTRY(D3DKMTEscape),
D3DKMT_LOAD_ENTRY(D3DKMTCreateDevice),
D3DKMT_LOAD_ENTRY(D3DKMTDestroyDevice),
D3DKMT_LOAD_ENTRY(D3DKMTCreateContext),
D3DKMT_LOAD_ENTRY(D3DKMTDestroyContext),
D3DKMT_LOAD_ENTRY(D3DKMTCreateAllocation),
D3DKMT_LOAD_ENTRY(D3DKMTDestroyAllocation),
D3DKMT_LOAD_ENTRY(D3DKMTRender),
D3DKMT_LOAD_ENTRY(D3DKMTPresent),
D3DKMT_LOAD_ENTRY(D3DKMTGetSharedPrimaryHandle),
D3DKMT_LOAD_ENTRY(D3DKMTQueryResourceInfo),
D3DKMT_LOAD_ENTRY(D3DKMTOpenResource),
D3DKMT_LOAD_ENTRY(D3DKMTEnumAdapters),
D3DKMT_LOAD_ENTRY(D3DKMTOpenAdapterFromLuid),
{NULL, NULL},
};
#undef D3DKMT_LOAD_ENTRY
/** Initialize Kernel Mode Thunks (KMT) pointers in the g_D3DKMT structure.
*
* @returns True if successful.
*/
DECLCALLBACK(int) D3DKMTLoad(void)
{
/* Modules which use D3DKMT must link with gdi32. */
HMODULE hmod = GetModuleHandleA("gdi32.dll");
Assert(hmod);
if (hmod)
{
VBoxWddmLoadAdresses(hmod, g_D3DKMTLoadTable);
}
return hmod != NULL;
}
DECLCALLBACK(D3DKMTFUNCTIONS const *) D3DKMTFunctions(void)
{
return &g_D3DKMT;
}
/*
* Getting VirtualBox Graphics Adapter handle.
*/
static NTSTATUS vboxDispKmtOpenAdapterFromHdc(D3DKMT_HANDLE *phAdapter, LUID *pLuid)
{
*phAdapter = 0;
D3DKMTFUNCTIONS const *d3dkmt = D3DKMTFunctions();
if (d3dkmt->pfnD3DKMTOpenAdapterFromHdc == NULL)
return STATUS_NOT_SUPPORTED;
D3DKMT_OPENADAPTERFROMHDC OpenAdapterData;
memset(&OpenAdapterData, 0, sizeof(OpenAdapterData));
for (int i = 0; ; ++i)
{
DISPLAY_DEVICEA dd;
memset(&dd, 0, sizeof(dd));
dd.cb = sizeof(dd);
if (!EnumDisplayDevicesA(NULL, i, &dd, 0))
break;
if (dd.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
{
OpenAdapterData.hDc = CreateDCA(NULL, dd.DeviceName, NULL, NULL);
break;
}
}
Assert(OpenAdapterData.hDc);
NTSTATUS Status;
if (OpenAdapterData.hDc)
{
Status = d3dkmt->pfnD3DKMTOpenAdapterFromHdc(&OpenAdapterData);
Assert(Status == STATUS_SUCCESS);
if (Status == STATUS_SUCCESS)
{
*phAdapter = OpenAdapterData.hAdapter;
if (pLuid)
{
*pLuid = OpenAdapterData.AdapterLuid;
}
}
DeleteDC(OpenAdapterData.hDc);
}
else
{
Status = STATUS_NOT_SUPPORTED;
}
return Status;
}
static NTSTATUS vboxDispKmtOpenAdapterFromLuid(D3DKMT_HANDLE *phAdapter, LUID *pLuid)
{
*phAdapter = 0;
D3DKMTFUNCTIONS const *d3dkmt = D3DKMTFunctions();
if ( d3dkmt->pfnD3DKMTOpenAdapterFromLuid == NULL
|| d3dkmt->pfnD3DKMTEnumAdapters == NULL)
return STATUS_NOT_SUPPORTED;
D3DKMT_ENUMADAPTERS EnumAdaptersData;
memset(&EnumAdaptersData, 0, sizeof(EnumAdaptersData));
EnumAdaptersData.NumAdapters = RT_ELEMENTS(EnumAdaptersData.Adapters);
NTSTATUS Status = d3dkmt->pfnD3DKMTEnumAdapters(&EnumAdaptersData);
Assert(Status == STATUS_SUCCESS);
if (Status == STATUS_SUCCESS)
{
Assert(EnumAdaptersData.NumAdapters);
/* Try the same twice: if we fail to open the adapter containing present sources,
* then try to open any adapter.
*/
for (int iPass = 0; iPass < 2 && *phAdapter == 0; ++iPass)
{
for (ULONG i = 0; i < EnumAdaptersData.NumAdapters; ++i)
{
if (iPass > 0 || EnumAdaptersData.Adapters[i].NumOfSources)
{
D3DKMT_OPENADAPTERFROMLUID OpenAdapterData;
memset(&OpenAdapterData, 0, sizeof(OpenAdapterData));
OpenAdapterData.AdapterLuid = EnumAdaptersData.Adapters[i].AdapterLuid;
Status = d3dkmt->pfnD3DKMTOpenAdapterFromLuid(&OpenAdapterData);
Assert(Status == STATUS_SUCCESS);
if (Status == STATUS_SUCCESS)
{
*phAdapter = OpenAdapterData.hAdapter;
if (pLuid)
{
*pLuid = EnumAdaptersData.Adapters[i].AdapterLuid;
}
break;
}
}
}
}
}
return Status;
}
NTSTATUS vboxDispKmtOpenAdapter2(D3DKMT_HANDLE *phAdapter, LUID *pLuid)
{
NTSTATUS Status = vboxDispKmtOpenAdapterFromLuid(phAdapter, pLuid);
if (Status != STATUS_SUCCESS)
{
/* Fallback for pre-Windows8 */
Status = vboxDispKmtOpenAdapterFromHdc(phAdapter, pLuid);
}
return Status;
}
NTSTATUS vboxDispKmtOpenAdapter(D3DKMT_HANDLE *phAdapter)
{
return vboxDispKmtOpenAdapter2(phAdapter, NULL);
}
NTSTATUS vboxDispKmtCloseAdapter(D3DKMT_HANDLE hAdapter)
{
D3DKMTFUNCTIONS const *d3dkmt = D3DKMTFunctions();
if (d3dkmt->pfnD3DKMTCloseAdapter == NULL)
return STATUS_NOT_SUPPORTED;
D3DKMT_CLOSEADAPTER CloseAdapterData;
CloseAdapterData.hAdapter = hAdapter;
NTSTATUS Status = d3dkmt->pfnD3DKMTCloseAdapter(&CloseAdapterData);
Assert(Status == STATUS_SUCCESS);
return Status;
}
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