1 files changed, 132 insertions, 0 deletions
diff --git a/roms/edk2/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2InstanceLibDTpm.c b/roms/edk2/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2InstanceLibDTpm.c
new file mode 100644
index 000000000..691eaa40c
--- /dev/null
+++ b/roms/edk2/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2InstanceLibDTpm.c
@@ -0,0 +1,132 @@
+/** @file
+  This library is TPM2 DTPM instance.
+  It can be registered to Tpm2 Device router, to be active TPM2 engine,
+  based on platform setting.
+
+Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/Tpm2DeviceLib.h>
+#include <Library/PcdLib.h>
+
+#include <Guid/TpmInstance.h>
+
+/**
+  Return PTP interface type.
+
+  @param[in] Register                Pointer to PTP register.
+
+  @return PTP interface type.
+**/
+TPM2_PTP_INTERFACE_TYPE
+Tpm2GetPtpInterface (
+  IN VOID *Register
+  );
+
+/**
+  Return PTP CRB interface IdleByPass state.
+
+  @param[in] Register                Pointer to PTP register.
+
+  @return PTP CRB interface IdleByPass state.
+**/
+UINT8
+Tpm2GetIdleByPass (
+  IN VOID *Register
+  );
+
+/**
+  Dump PTP register information.
+
+  @param[in] Register                Pointer to PTP register.
+**/
+VOID
+DumpPtpInfo (
+  IN VOID *Register
+  );
+
+/**
+  This service enables the sending of commands to the TPM2.
+
+  @param[in]      InputParameterBlockSize  Size of the TPM2 input parameter block.
+  @param[in]      InputParameterBlock      Pointer to the TPM2 input parameter block.
+  @param[in,out]  OutputParameterBlockSize Size of the TPM2 output parameter block.
+  @param[in]      OutputParameterBlock     Pointer to the TPM2 output parameter block.
+
+  @retval EFI_SUCCESS            The command byte stream was successfully sent to the device and a response was successfully received.
+  @retval EFI_DEVICE_ERROR       The command was not successfully sent to the device or a response was not successfully received from the device.
+  @retval EFI_BUFFER_TOO_SMALL   The output parameter block is too small.
+**/
+EFI_STATUS
+EFIAPI
+DTpm2SubmitCommand (
+  IN UINT32            InputParameterBlockSize,
+  IN UINT8             *InputParameterBlock,
+  IN OUT UINT32        *OutputParameterBlockSize,
+  IN UINT8             *OutputParameterBlock
+  );
+
+/**
+  This service requests use TPM2.
+
+  @retval EFI_SUCCESS      Get the control of TPM2 chip.
+  @retval EFI_NOT_FOUND    TPM2 not found.
+  @retval EFI_DEVICE_ERROR Unexpected device behavior.
+**/
+EFI_STATUS
+EFIAPI
+DTpm2RequestUseTpm (
+  VOID
+  );
+
+TPM2_DEVICE_INTERFACE  mDTpm2InternalTpm2Device = {
+  TPM_DEVICE_INTERFACE_TPM20_DTPM,
+  DTpm2SubmitCommand,
+  DTpm2RequestUseTpm,
+};
+
+/**
+  The function register DTPM2.0 instance and caches current active TPM interface type.
+
+  @retval EFI_SUCCESS   DTPM2.0 instance is registered, or system does not support register DTPM2.0 instance
+**/
+EFI_STATUS
+EFIAPI
+Tpm2InstanceLibDTpmConstructor (
+  VOID
+  )
+{
+  EFI_STATUS               Status;
+  TPM2_PTP_INTERFACE_TYPE  PtpInterface;
+  UINT8                    IdleByPass;
+
+  Status = Tpm2RegisterTpm2DeviceLib (&mDTpm2InternalTpm2Device);
+  if ((Status == EFI_SUCCESS) || (Status == EFI_UNSUPPORTED)) {
+    //
+    // Unsupported means platform policy does not need this instance enabled.
+    //
+    if (Status == EFI_SUCCESS) {
+      //
+      // Cache current active TpmInterfaceType only when needed
+      //
+      if (PcdGet8(PcdActiveTpmInterfaceType) == 0xFF) {
+        PtpInterface = Tpm2GetPtpInterface ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));
+        PcdSet8S(PcdActiveTpmInterfaceType, PtpInterface);
+      }
+
+      if (PcdGet8(PcdActiveTpmInterfaceType) == Tpm2PtpInterfaceCrb && PcdGet8(PcdCRBIdleByPass) == 0xFF) {
+        IdleByPass = Tpm2GetIdleByPass((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));
+        PcdSet8S(PcdCRBIdleByPass, IdleByPass);
+      }
+
+      DumpPtpInfo ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));
+    }
+    return EFI_SUCCESS;
+  }
+  return Status;
+}