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[VIDEOPRT] Give to each device its own entry in HKLM\SYSTEM\CurrentControlSet\Services

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This is required if you have two graphic cards using the same driver.
This commit is contained in:
Hervé Poussineau 2021-05-29 08:29:30 +02:00
parent e8902450bc
commit 2ae6bd7453
3 changed files with 24 additions and 3 deletions
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24
win32ss/drivers/videoprt/registry.c
View file

@ -531,18 +531,33 @@ NTSTATUS
NTAPI
IntCreateRegistryPath(
IN PCUNICODE_STRING DriverRegistryPath,
IN ULONG DeviceNumber,
OUT PUNICODE_STRING DeviceRegistryPath)
{
static WCHAR RegistryMachineSystem[] = L"\\REGISTRY\\MACHINE\\SYSTEM\\";
static WCHAR CurrentControlSet[] = L"CURRENTCONTROLSET\\";
static WCHAR ControlSet[] = L"CONTROLSET";
static WCHAR Insert1[] = L"Hardware Profiles\\Current\\System\\CurrentControlSet\\";
static WCHAR Insert2[] = L"\\Device0";
static WCHAR Insert2[] = L"\\Device";
UNICODE_STRING DeviceNumberString;
WCHAR DeviceNumberBuffer[20];
BOOLEAN Valid;
UNICODE_STRING AfterControlSet;
NTSTATUS Status;
AfterControlSet = *DriverRegistryPath;
/* Convert DeviceNumber to string */
DeviceNumberString.Length = 0;
DeviceNumberString.MaximumLength = sizeof(DeviceNumberBuffer);
DeviceNumberString.Buffer = DeviceNumberBuffer;
Status = RtlIntegerToUnicodeString(DeviceNumber, 10, &DeviceNumberString);
if (!NT_SUCCESS(Status))
{
ERR_(VIDEOPRT, "RtlIntegerToUnicodeString(%u) returned 0x%08x\n", DeviceNumber, Status);
return Status;
}
/* Check if path begins with \\REGISTRY\\MACHINE\\SYSTEM\\ */
Valid = (DriverRegistryPath->Length > sizeof(RegistryMachineSystem) &&
0 == _wcsnicmp(DriverRegistryPath->Buffer, RegistryMachineSystem,
@ -586,7 +601,8 @@ IntCreateRegistryPath(
if (Valid)
{
DeviceRegistryPath->MaximumLength = DriverRegistryPath->Length + sizeof(Insert1) + sizeof(Insert2);
DeviceRegistryPath->MaximumLength = DriverRegistryPath->Length + sizeof(Insert1) + sizeof(Insert2)
+ DeviceNumberString.Length;
DeviceRegistryPath->Buffer = ExAllocatePoolWithTag(PagedPool,
DeviceRegistryPath->MaximumLength,
TAG_VIDEO_PORT);
@ -600,6 +616,7 @@ IntCreateRegistryPath(
RtlAppendUnicodeToString(DeviceRegistryPath, Insert1);
RtlAppendUnicodeStringToString(DeviceRegistryPath, &AfterControlSet);
RtlAppendUnicodeToString(DeviceRegistryPath, Insert2);
RtlAppendUnicodeStringToString(DeviceRegistryPath, &DeviceNumberString);
/* Check if registry key exists */
Valid = NT_SUCCESS(RtlCheckRegistryKey(RTL_REGISTRY_ABSOLUTE, DeviceRegistryPath->Buffer));
@ -620,7 +637,7 @@ IntCreateRegistryPath(
/* If path doesn't point to *ControlSet*, use DriverRegistryPath directly */
if (!Valid)
{
DeviceRegistryPath->MaximumLength = DriverRegistryPath->Length + sizeof(Insert2);
DeviceRegistryPath->MaximumLength = DriverRegistryPath->Length + sizeof(Insert2) + DeviceNumberString.Length;
DeviceRegistryPath->Buffer = ExAllocatePoolWithTag(NonPagedPool,
DeviceRegistryPath->MaximumLength,
TAG_VIDEO_PORT);
@ -630,6 +647,7 @@ IntCreateRegistryPath(
RtlCopyUnicodeString(DeviceRegistryPath, DriverRegistryPath);
RtlAppendUnicodeToString(DeviceRegistryPath, Insert2);
RtlAppendUnicodeStringToString(DeviceRegistryPath, &DeviceNumberString);
}
DPRINT("Formatted registry key '%wZ' -> '%wZ'\n",

2
win32ss/drivers/videoprt/videoprt.c
View file

@ -170,6 +170,7 @@ IntVideoPortCreateAdapterDeviceObject(
/* Get the registry path associated with this device. */
Status = IntCreateRegistryPath(&DriverExtension->RegistryPath,
DriverExtension->InitializationData.StartingDeviceNumber,
&DeviceExtension->RegistryPath);
if (!NT_SUCCESS(Status))
{
@ -242,6 +243,7 @@ IntVideoPortCreateAdapterDeviceObject(
IntCreateNewRegistryPath(DeviceExtension);
IntSetupDeviceSettingsKey(DeviceExtension);
DriverExtension->InitializationData.StartingDeviceNumber++;
/* Remove the initailizing flag */
(*DeviceObject)->Flags &= ~DO_DEVICE_INITIALIZING;

1
win32ss/drivers/videoprt/videoprt.h
View file

@ -342,6 +342,7 @@ NTSTATUS
NTAPI
IntCreateRegistryPath(
IN PCUNICODE_STRING DriverRegistryPath,
IN ULONG DeviceNumber,
OUT PUNICODE_STRING DeviceRegistryPath);