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[VIDEOPRT] In legacy detection, don't guess the maximum number of buses of a certain type.

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Use whatever number there is on the system.
Also ensure that vpStatus is correctly initialized.
This commit is contained in:
Hermès Bélusca-Maïto 2023-06-07 22:53:10 +02:00
parent 6409f97bc4
commit 7eca194709
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GPG key ID: 3B2539C65E7B93D0
1 changed files with 85 additions and 8 deletions
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93
win32ss/drivers/videoprt/videoprt.c
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@ -317,7 +317,7 @@ IntVideoPortCreateAdapterDeviceObject(
IntSetupDeviceSettingsKey(DeviceExtension);
/* Remove the initailizing flag */
/* Remove the initializing flag */
(*DeviceObject)->Flags &= ~DO_DEVICE_INITIALIZING;
/* Set up the VIDEO/DEVICEMAP registry keys */
@ -343,6 +343,71 @@ Failure:
return Status;
}
/**
* @brief
* A PIO_QUERY_DEVICE_ROUTINE callback for IoQueryDeviceDescription()
* to return success when an enumerated bus has been found.
**/
static NTSTATUS
NTAPI
IntVideoPortEnumBusCallback(
_In_ PVOID Context,
_In_ PUNICODE_STRING PathName,
_In_ INTERFACE_TYPE BusType,
_In_ ULONG BusNumber,
_In_ PKEY_VALUE_FULL_INFORMATION* BusInformation,
_In_ CONFIGURATION_TYPE ControllerType,
_In_ ULONG ControllerNumber,
_In_ PKEY_VALUE_FULL_INFORMATION* ControllerInformation,
_In_ CONFIGURATION_TYPE PeripheralType,
_In_ ULONG PeripheralNumber,
_In_ PKEY_VALUE_FULL_INFORMATION* PeripheralInformation)
{
UNREFERENCED_PARAMETER(Context);
UNREFERENCED_PARAMETER(PathName);
UNREFERENCED_PARAMETER(BusType);
UNREFERENCED_PARAMETER(BusNumber);
UNREFERENCED_PARAMETER(BusInformation);
UNREFERENCED_PARAMETER(ControllerType);
UNREFERENCED_PARAMETER(ControllerNumber);
UNREFERENCED_PARAMETER(ControllerInformation);
UNREFERENCED_PARAMETER(PeripheralType);
UNREFERENCED_PARAMETER(PeripheralNumber);
UNREFERENCED_PARAMETER(PeripheralInformation);
/* The bus has been found */
return STATUS_SUCCESS;
}
/**
* @brief
* Enumerates all supported buses on the system.
**/
static NTSTATUS
IntVideoPortEnumBuses(
_In_ INTERFACE_TYPE AdapterInterfaceType,
_Inout_ PULONG BusNumber)
{
// TODO: Forward-compatibility with Windows 7+:
// In case AdapterInterfaceType == PCIBus, check for the
// \Registry\HARDWARE\DESCRIPTION\System\VideoAdapterBusses
// key (created by pci.sys) that enumerates the PCI buses that
// are known to have video display adapters on them.
// This is a handy shortcut for videoprt, that would otherwise
// have to enumerate all the PCI buses (PCI_MAX_BRIDGE_NUMBER)
// to locate any video adapter.
// Otherwise, fall back to the usual method done below.
/* Find the next bus of the given type */
return IoQueryDeviceDescription(&AdapterInterfaceType,
BusNumber,
NULL,
NULL,
NULL,
NULL,
IntVideoPortEnumBusCallback,
NULL);
}
NTSTATUS
NTAPI
@ -401,12 +466,23 @@ IntVideoPortFindAdapter(
if (LegacyDetection)
{
ULONG BusNumber, MaxBuses;
ULONG BusNumber;
MaxBuses = DeviceExtension->AdapterInterfaceType == PCIBus ? PCI_MAX_BRIDGE_NUMBER : 1;
/* Suppose first we may not find any suitable device */
vpStatus = ERROR_DEV_NOT_EXIST; // ERROR_NO_MORE_DEVICES;
for (BusNumber = 0; BusNumber < MaxBuses; BusNumber++)
/* Enumerate all buses of the given type, call HwFindAdapter for each
* to find whether a video adapter is recognized there. Stop when an
* adapter has been found. */
for (BusNumber = 0;
(BusNumber < MAXULONG) &&
NT_SUCCESS(IntVideoPortEnumBuses(DeviceExtension->AdapterInterfaceType,
&BusNumber));
++BusNumber)
{
DPRINT("Bus Type %lu, Number %lu\n",
DeviceExtension->AdapterInterfaceType, BusNumber);
DeviceExtension->SystemIoBusNumber =
ConfigInfo.SystemIoBusNumber = BusNumber;
@ -414,6 +490,7 @@ IntVideoPortFindAdapter(
DriverExtension->InitializationData.HwDeviceExtensionSize);
/* FIXME: Need to figure out what string to pass as param 3. */
// FIXME: Handle the 'Again' parameter for legacy detection.
vpStatus = DriverExtension->InitializationData.HwFindAdapter(
&DeviceExtension->MiniPortDeviceExtension,
DriverExtension->HwContext,
@ -700,10 +777,10 @@ VideoPortInitialize(
switch (HwInitializationData->HwInitDataSize)
{
/*
* NT4 drivers are special case, because we must use legacy method
* of detection instead of the Plug & Play one.
*/
/*
* NT4 drivers are special case, because we must use legacy method
* of detection instead of the Plug & Play one.
*/
case SIZE_OF_NT4_VIDEO_HW_INITIALIZATION_DATA:
INFO_(VIDEOPRT, "We were loaded by a Windows NT miniport driver.\n");
break;