diff options
Diffstat (limited to 'SecurityPkg/Library/Tpm2DeviceLibRouter/Tpm2DeviceLibRouterPei.c')
| -rw-r--r-- | SecurityPkg/Library/Tpm2DeviceLibRouter/Tpm2DeviceLibRouterPei.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/SecurityPkg/Library/Tpm2DeviceLibRouter/Tpm2DeviceLibRouterPei.c b/SecurityPkg/Library/Tpm2DeviceLibRouter/Tpm2DeviceLibRouterPei.c new file mode 100644 index 000000000..f59b7bf1b --- /dev/null +++ b/SecurityPkg/Library/Tpm2DeviceLibRouter/Tpm2DeviceLibRouterPei.c @@ -0,0 +1,143 @@ +/** @file
+ Ihis library is TPM2 device router. Platform can register multi TPM2 instance to it
+ via PcdTpmInstanceGuid. Platform need make choice that which one will be final one.
+ At most one TPM2 instance can be finally registered, and other will return unsupported.
+
+Copyright (c) 2013, Intel Corporation. All rights reserved. <BR>
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/HobLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <Library/Tpm2DeviceLib.h>
+
+EFI_GUID mInternalTpm2DeviceInterfaceGuid = {
+ 0x349cf818, 0xc0ba, 0x4c43, 0x92, 0x9a, 0xc8, 0xa1, 0xb1, 0xb3, 0xd2, 0x55
+};
+
+/**
+ This function get TPM2.0 interface.
+
+ @retval TPM2.0 interface.
+**/
+TPM2_DEVICE_INTERFACE *
+InternalGetTpm2DeviceInterface (
+ VOID
+ )
+{
+ EFI_HOB_GUID_TYPE *Hob;
+
+ Hob = GetFirstGuidHob (&mInternalTpm2DeviceInterfaceGuid);
+ if (Hob == NULL) {
+ return NULL;
+ }
+ return (TPM2_DEVICE_INTERFACE *)(Hob + 1);
+}
+
+/**
+ 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
+Tpm2SubmitCommand (
+ IN UINT32 InputParameterBlockSize,
+ IN UINT8 *InputParameterBlock,
+ IN OUT UINT32 *OutputParameterBlockSize,
+ IN UINT8 *OutputParameterBlock
+ )
+{
+ TPM2_DEVICE_INTERFACE *Tpm2DeviceInterface;
+
+ Tpm2DeviceInterface = InternalGetTpm2DeviceInterface ();
+ if (Tpm2DeviceInterface == NULL) {
+ return EFI_UNSUPPORTED;
+ }
+
+ return Tpm2DeviceInterface->Tpm2SubmitCommand (
+ InputParameterBlockSize,
+ InputParameterBlock,
+ OutputParameterBlockSize,
+ 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
+Tpm2RequestUseTpm (
+ VOID
+ )
+{
+ TPM2_DEVICE_INTERFACE *Tpm2DeviceInterface;
+
+ Tpm2DeviceInterface = InternalGetTpm2DeviceInterface ();
+ if (Tpm2DeviceInterface == NULL) {
+ return EFI_UNSUPPORTED;
+ }
+ return Tpm2DeviceInterface->Tpm2RequestUseTpm ();
+}
+
+/**
+ This service register TPM2 device.
+
+ @param Tpm2Device TPM2 device
+
+ @retval EFI_SUCCESS This TPM2 device is registered successfully.
+ @retval EFI_UNSUPPORTED System does not support register this TPM2 device.
+ @retval EFI_ALREADY_STARTED System already register this TPM2 device.
+**/
+EFI_STATUS
+EFIAPI
+Tpm2RegisterTpm2DeviceLib (
+ IN TPM2_DEVICE_INTERFACE *Tpm2Device
+ )
+{
+ TPM2_DEVICE_INTERFACE *Tpm2DeviceInterface;
+
+ if (!CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &Tpm2Device->ProviderGuid)){
+ DEBUG ((EFI_D_ERROR, "WARNING: Tpm2RegisterTpm2DeviceLib - does not support %g registration\n", &Tpm2Device->ProviderGuid));
+ return EFI_UNSUPPORTED;
+ }
+
+ Tpm2DeviceInterface = InternalGetTpm2DeviceInterface ();
+ if (Tpm2DeviceInterface != NULL) {
+ //
+ // In PEI phase, there will be shadow driver dispatched again.
+ //
+ DEBUG ((EFI_D_ERROR, "Tpm2RegisterTpm2DeviceLib - Override\n"));
+ CopyMem (Tpm2DeviceInterface, Tpm2Device, sizeof(*Tpm2Device));
+ return EFI_SUCCESS;
+ } else {
+ Tpm2Device = BuildGuidDataHob (&mInternalTpm2DeviceInterfaceGuid, Tpm2Device, sizeof(*Tpm2Device));
+ if (Tpm2Device != NULL) {
+ return EFI_SUCCESS;
+ } else {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ }
+}
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