IntelSiliconPkg/IntelVTdPmrPei: Parse RMRR table.

In order to support PEI graphic, we let VTdPmrPei driver
parse DMAR table RMRR entry and allow the UMA access.

If a system has no PEI IGD, no RMRR is needed. The behavior
is unchanged.

If a system has PEI IGD, it must report RMRR in PEI phase.
The PeiVTdPrm will program the IGD VTd engine to skip the
RMRR region, and program the rest PCI VTd engine to skip
the another DMA buffer allocated in PEI phase for other
device driver.

Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.h

@@ -15,9 +15,16 @@
 #ifndef __DMA_ACCESS_LIB_H__
 #define __DMA_ACCESS_LIB_H__
 
+typedef struct {
+  UINT8                                   HostAddressWidth;
+  UINTN                                   VTdEngineCount;
+  UINT64                                  VTdEngineAddress[1];
+} VTD_INFO;
+
 /**
   Set DMA protected region.
 
+  @param EngineMask         The mask of the VTd engine to be accessed.
   @param LowMemoryBase      The protected low memory region base.
   @param LowMemoryLength    The protected low memory region length.
   @param HighMemoryBase     The protected high memory region base.
@@ -28,6 +35,7 @@
 **/
 EFI_STATUS
 SetDmaProtectedRange (
+  IN UINT64        EngineMask,
   IN UINT32        LowMemoryBase,
   IN UINT32        LowMemoryLength,
   IN UINT64        HighMemoryBase,
@@ -37,31 +45,37 @@ SetDmaProtectedRange (
 /**
   Diable DMA protection.
 
+  @param EngineMask         The mask of the VTd engine to be accessed.
+
   @retval DMA protection is disabled.
 **/
 EFI_STATUS
 DisableDmaProtection (
-  VOID
+  IN UINT64        EngineMask
   );
 
 /**
   Get protected low memory alignment.
 
+  @param EngineMask         The mask of the VTd engine to be accessed.
+
   @return protected low memory alignment.
 **/
 UINT32
 GetLowMemoryAlignment (
-  VOID
+  IN UINT64        EngineMask
   );
 
 /**
   Get protected high memory alignment.
 
+  @param EngineMask         The mask of the VTd engine to be accessed.
+
   @return protected high memory alignment.
 **/
 UINT64
 GetHighMemoryAlignment (
-  VOID
+  IN UINT64        EngineMask
   );
 
 #endif