SecurityPkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / SecurityPkg / Library / Tpm2DeviceLibDTpm / Tpm2InstanceLibDTpm.c

diff --git a/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2InstanceLibDTpm.c b/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2InstanceLibDTpm.c
index 3f28f21faa39f3bca68621043ebb173f3dd8d5d0..435cbf62985d67e7597e94bc3ec011b1ce08324e 100644 (file)
--- a/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2InstanceLibDTpm.c
+++ b/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2InstanceLibDTpm.c
@@ -3,14 +3,8 @@
   It can be registered to Tpm2 Device router, to be active TPM2 engine,\r
   based on platform setting.\r
 \r
-Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved. <BR>\r
-This program and the accompanying materials\r
-are licensed and made available under the terms and conditions of the BSD License\r
-which accompanies this distribution.  The full text of the license may be found at\r
-http://opensource.org/licenses/bsd-license.php\r
-\r
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>\r
+SPDX-License-Identifier: BSD-2-Clause-Patent\r
 \r
 **/\r
 \r
@@ -18,9 +12,34 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <Library/BaseMemoryLib.h>\r
 #include <Library/DebugLib.h>\r
 #include <Library/Tpm2DeviceLib.h>\r
+#include <Library/PcdLib.h>\r
 \r
 #include <Guid/TpmInstance.h>\r
 \r
+/**\r
+  Return PTP interface type.\r
+\r
+  @param[in] Register                Pointer to PTP register.\r
+\r
+  @return PTP interface type.\r
+**/\r
+TPM2_PTP_INTERFACE_TYPE\r
+Tpm2GetPtpInterface (\r
+  IN VOID *Register\r
+  );\r
+\r
+/**\r
+  Return PTP CRB interface IdleByPass state.\r
+\r
+  @param[in] Register                Pointer to PTP register.\r
+\r
+  @return PTP CRB interface IdleByPass state.\r
+**/\r
+UINT8\r
+Tpm2GetIdleByPass (\r
+  IN VOID *Register\r
+  );\r
+\r
 /**\r
   Dump PTP register information.\r
 \r
@@ -41,7 +60,7 @@ DumpPtpInfo (
 \r
   @retval EFI_SUCCESS            The command byte stream was successfully sent to the device and a response was successfully received.\r
   @retval EFI_DEVICE_ERROR       The command was not successfully sent to the device or a response was not successfully received from the device.\r
-  @retval EFI_BUFFER_TOO_SMALL   The output parameter block is too small. \r
+  @retval EFI_BUFFER_TOO_SMALL   The output parameter block is too small.\r
 **/\r
 EFI_STATUS\r
 EFIAPI\r
@@ -72,8 +91,8 @@ TPM2_DEVICE_INTERFACE  mDTpm2InternalTpm2Device = {
 };\r
 \r
 /**\r
-  The function register DTPM2.0 instance.\r
-  \r
+  The function register DTPM2.0 instance and caches current active TPM interface type.\r
+\r
   @retval EFI_SUCCESS   DTPM2.0 instance is registered, or system dose not surpport registr DTPM2.0 instance\r
 **/\r
 EFI_STATUS\r
@@ -82,7 +101,9 @@ Tpm2InstanceLibDTpmConstructor (
   VOID\r
   )\r
 {\r
-  EFI_STATUS  Status;\r
+  EFI_STATUS               Status;\r
+  TPM2_PTP_INTERFACE_TYPE  PtpInterface;\r
+  UINT8                    IdleByPass;\r
 \r
   Status = Tpm2RegisterTpm2DeviceLib (&mDTpm2InternalTpm2Device);\r
   if ((Status == EFI_SUCCESS) || (Status == EFI_UNSUPPORTED)) {\r
@@ -90,6 +111,19 @@ Tpm2InstanceLibDTpmConstructor (
     // Unsupported means platform policy does not need this instance enabled.\r
     //\r
     if (Status == EFI_SUCCESS) {\r
+      //\r
+      // Cache current active TpmInterfaceType only when needed\r
+      //\r
+      if (PcdGet8(PcdActiveTpmInterfaceType) == 0xFF) {\r
+        PtpInterface = Tpm2GetPtpInterface ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));\r
+        PcdSet8S(PcdActiveTpmInterfaceType, PtpInterface);\r
+      }\r
+\r
+      if (PcdGet8(PcdActiveTpmInterfaceType) == Tpm2PtpInterfaceCrb && PcdGet8(PcdCRBIdleByPass) == 0xFF) {\r
+        IdleByPass = Tpm2GetIdleByPass((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));\r
+        PcdSet8S(PcdCRBIdleByPass, IdleByPass);\r
+      }\r
+\r
       DumpPtpInfo ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));\r
     }\r
     return EFI_SUCCESS;\r