/**
Initializes the Intel VTd PMR for DMA buffer.
@retval EFI_SUCCESS Usb bot driver is successfully initialized.
@retval EFI_OUT_OF_RESOURCES Can't initialize the driver.
**/
EFI_STATUS
InitVTdPmrForDma (
VOID
)
{
EFI_STATUS Status;
VOID *Hob;
VTD_INFO *VTdInfo;
Hob = GetFirstGuidHob (&mVTdInfoGuid);
VTdInfo = GET_GUID_HOB_DATA(Hob);
//
// If there is RMRR memory, parse it here.
//
ParseDmarAcpiTableRmrr (VTdInfo);
//
// Allocate a range in PEI memory as DMA buffer
// Mark others to be DMA protected.
//
Status = InitDmaProtection (VTdInfo);
return Status;
}
/**
Setup VTd engine.
**/
VOID
SetupVtd (
VOID
)
{
EFI_STATUS Status;
VOID *PciEnumerationComplete;
UINTN Index;
UINT64 Below4GMemoryLimit;
UINT64 Above4GMemoryLimit;
//
// PCI Enumeration must be done
//
Status = gBS->LocateProtocol (
&gEfiPciEnumerationCompleteProtocolGuid,
NULL,
&PciEnumerationComplete
);
ASSERT_EFI_ERROR (Status);
ReturnUefiMemoryMap (&Below4GMemoryLimit, &Above4GMemoryLimit);
Below4GMemoryLimit = ALIGN_VALUE_UP(Below4GMemoryLimit, SIZE_256MB);
DEBUG ((DEBUG_INFO, " Adjusted Below4GMemoryLimit: 0x%016lx\n", Below4GMemoryLimit));
mBelow4GMemoryLimit = Below4GMemoryLimit;
mAbove4GMemoryLimit = Above4GMemoryLimit;
//
// 1. setup
//
DEBUG ((DEBUG_INFO, "ParseDmarAcpiTable\n"));
Status = ParseDmarAcpiTableDrhd ();
if (EFI_ERROR (Status)) {
return;
}
DEBUG ((DEBUG_INFO, "PrepareVtdConfig\n"));
PrepareVtdConfig ();
//
// 2. initialization
//
DEBUG ((DEBUG_INFO, "SetupTranslationTable\n"));
Status = SetupTranslationTable ();
if (EFI_ERROR (Status)) {
return;
}
InitializePlatformVTdPolicy ();
ParseDmarAcpiTableRmrr ();
if ((PcdGet8 (PcdVTdPolicyPropertyMask) & BIT2) == 0) {
//
// Support IOMMU access attribute request recording before DMAR table is installed.
// Here is to process the requests.
//
ProcessRequestedAccessAttribute ();
}
for (Index = 0; Index < mVtdUnitNumber; Index++) {
DEBUG ((DEBUG_INFO,"VTD Unit %d (Segment: %04x)\n", Index, mVtdUnitInformation[Index].Segment));
if (mVtdUnitInformation[Index].ExtRootEntryTable != NULL) {
DumpDmarExtContextEntryTable (mVtdUnitInformation[Index].ExtRootEntryTable);
}
if (mVtdUnitInformation[Index].RootEntryTable != NULL) {
DumpDmarContextEntryTable (mVtdUnitInformation[Index].RootEntryTable);
}
}
//
// 3. enable
//
DEBUG ((DEBUG_INFO, "EnableDmar\n"));
Status = EnableDmar ();
if (EFI_ERROR (Status)) {
return;
}
DEBUG ((DEBUG_INFO, "DumpVtdRegs\n"));
DumpVtdRegsAll ();
}