add SR-IOV support in EDK II.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9269 6f19259b-4bc3-4df7-8a09-765794883524

IntelFrameworkModulePkg/Bus/Pci/PciBusDxe/PciCommand.h

@@ -118,6 +118,27 @@ LocateCapabilityRegBlock (
   OUT UINT8         *NextRegBlock OPTIONAL
   );
 
+/**
+  Locate PciExpress capability register block per capability ID.
+
+  @param PciIoDevice       A pointer to the PCI_IO_DEVICE.
+  @param CapId             The capability ID.
+  @param Offset            A pointer to the offset returned.
+  @param NextRegBlock      A pointer to the next block returned.
+
+  @retval EFI_SUCCESS      Successfuly located capability register block.
+  @retval EFI_UNSUPPORTED  Pci device does not support capability.
+  @retval EFI_NOT_FOUND    Pci device support but can not find register block.
+
+**/
+EFI_STATUS
+LocatePciExpressCapabilityRegBlock (
+  IN     PCI_IO_DEVICE *PciIoDevice,
+  IN     UINT16        CapId,
+  IN OUT UINT32        *Offset,
+     OUT UINT32        *NextRegBlock OPTIONAL
+  );
+
 /**
   Macro that reads command register.