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[VGAMP] Correctly check and report legacy resources (VGA I/O ports and memory)

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As we are a non PNP driver, the call chain will be
DriverEntry -> VidePortInitialize -> VideoPortFindAdapter -> HwFindAdapter.

If legacy resources are available, we will fail VGAFindAdapter,
so DriverEntry will fail, so vgamp.sys driver won't be used.

CORE-17789
This commit is contained in:
Hervé Poussineau 2021-10-07 21:40:13 +02:00
parent 6dd94572e5
commit 951dc66c66
1 changed files with 23 additions and 5 deletions
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28
win32ss/drivers/miniport/vga/vgamp.c
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@ -10,6 +10,13 @@
#include <dderror.h>
#include <devioctl.h>
VIDEO_ACCESS_RANGE VGAAccessRange[] =
{
{ {{0x3b0}}, 0x3bb - 0x3b0 + 1, 1, 0, 0 },
{ {{0x3c0}}, 0x3df - 0x3c0 + 1, 1, 0, 0 },
{ {{0xa0000}}, 0x20000, 0, 0, 0 },
};
// ------------------------------------------------------- Public Interface
// DriverEntry
@ -45,6 +52,8 @@ DriverEntry(IN PVOID Context1,
/* InitData.HwInterrupt = VGAInterrupt; */
InitData.HwResetHw = VGAResetHw;
/* InitData.HwTimer = VGATimer; */
InitData.HwLegacyResourceList = VGAAccessRange;
InitData.HwLegacyResourceCount = ARRAYSIZE(VGAAccessRange);
return VideoPortInitialize(Context1, Context2, &InitData, NULL);
}
@ -82,12 +91,21 @@ VGAFindAdapter(PVOID DeviceExtension,
PVIDEO_PORT_CONFIG_INFO ConfigInfo,
PUCHAR Again)
{
/* FIXME: Determine if the adapter is present */
*Again = FALSE;
VP_STATUS Status;
ConfigInfo->VdmPhysicalVideoMemoryAddress.QuadPart = 0xa000;
ConfigInfo->VdmPhysicalVideoMemoryLength = 0x2000;
return NO_ERROR;
/* FIXME: Determine if the adapter is present */
*Again = FALSE;
if (ConfigInfo->Length < sizeof(VIDEO_PORT_CONFIG_INFO))
return ERROR_INVALID_PARAMETER;
Status = VideoPortVerifyAccessRanges(DeviceExtension, ARRAYSIZE(VGAAccessRange), VGAAccessRange);
if (Status != NO_ERROR)
return Status;
ConfigInfo->VdmPhysicalVideoMemoryAddress = VGAAccessRange[2].RangeStart;
ConfigInfo->VdmPhysicalVideoMemoryLength = VGAAccessRange[2].RangeLength;
return NO_ERROR;
/* FIXME: Claim any necessary memory/IO resources for the adapter */
/* FIXME: Map resources into system memory for the adapter */