[PATCH] MdePkg/Include: Add DMTF PLDM Base definitions

["Chang, Abner" <abner.chang@amd.com>]

From: Abner Chang <abner.chang@amd.com>

BZ #4396
This change adds definitions for DMTF PLDM
base specification.

Spec ref:
https://www.dmtf.org/sites/default/files/standards/documents/DSP0240_1.1.0.pdf

Signed-off-by: Abner Chang <abner.chang@amd.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Nickle Wang <nicklew@nvidia.com>
Cc: Igor Kulchytskyy <igork@ami.com>
Cc: Isaac Oram <isaac.w.oram@intel.com>
Cc: Abdul Lateef Attar <AbdulLateef.Attar@amd.com>
---
 MdePkg/Include/IndustryStandard/Pldm.h | 81 ++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 MdePkg/Include/IndustryStandard/Pldm.h

diff --git a/MdePkg/Include/IndustryStandard/Pldm.h b/MdePkg/Include/IndustryStandard/Pldm.h
new file mode 100644
index 00000000000..82d65b71874
--- /dev/null
+++ b/MdePkg/Include/IndustryStandard/Pldm.h
@@ -0,0 +1,81 @@
+/**
+  The definitions of DMTF Platform Level Data Model (PLDM)
+  Base Specification.
+
+  Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  @par Revision Reference:
+  DMTF Platform Level Data Model (PLDM) Base Specification
+  Version 1.1.0
+  https://www.dmtf.org/sites/default/files/standards/documents/DSP0240_1.1.0.pdf
+
+**/
+
+#ifndef PLDM_H_
+#define PLDM_H_
+
+#pragma pack(1)
+
+#define PLDM_MESSAGE_HEADER_VERSION  0
+
+///
+/// General definitions from Platform Level Data Model (PLDM) Base
+/// Specification (DMTF DSP0240)
+///
+typedef struct  {
+  UINT8    InstanceId    : 5;          ///< Request instance ID.
+  UINT8    Reserved      : 1;          ///< Reserved bit.
+  UINT8    DatagramBit   : 1;          ///< used to indicate whether the Instance ID field is
+                                       ///< being used for tracking and matching requests and
+                                       ///< responses, or just being used for asynchronous
+                                       ///< notifications.
+  UINT8    RequestBit    : 1;          ///< Request bit.
+  UINT8    PldmType      : 6;          ///< PLDM message type.
+  UINT8    HeaderVersion : 2;          ///< Header version.
+  UINT8    PldmTypeCommandCode;        ///< The command code of PLDM message type.
+} PLDM_MESSAGE_HEADER;
+
+typedef PLDM_MESSAGE_HEADER PLDM_REQUEST_HEADER;
+
+#define PLDM_MESSAGE_HEADER_IS_REQUEST        1
+#define PLDM_MESSAGE_HEADER_IS_DATAGRAM       1
+#define PLDM_MESSAGE_HEADER_INSTANCE_ID_MASK  0x1f
+
+typedef struct {
+  PLDM_MESSAGE_HEADER    PldmHeader;
+  UINT8                  PldmCompletionCode;   ///< PLDM completion  of response message.
+} PLDM_RESPONSE_HEADER;
+
+#pragma pack()
+
+#define PLDM_HEADER_VERSION  0x00
+
+#define PLDM_COMPLETION_CODE_SUCCESS                     0x00
+#define PLDM_COMPLETION_CODE_ERROR                       0x01
+#define PLDM_COMPLETION_CODE_ERROR_INVALID_DATA          0x02
+#define PLDM_COMPLETION_CODE_ERROR_INVALID_LENGTH        0x03
+#define PLDM_COMPLETION_CODE_ERROR_NOT_READY             0x04
+#define PLDM_COMPLETION_CODE_ERROR_UNSUPPORTED_PLDM_CMD  0x05
+#define PLDM_COMPLETION_CODE_ERROR_INVALID_PLDM_TYPE     0x20
+#define PLDM_COMPLETION_CODE_SPECIFIC_START              0x80
+#define PLDM_COMPLETION_CODE_SPECIFIC_END                0xff
+
+///
+/// Type Code definitions from Platform Level Data Model (PLDM) IDs
+/// and Codes Specification (DMTF DSP0245)
+/// https://www.dmtf.org/sites/default/files/standards/documents/DSP0245_1.3.0.pdf
+///
+#define PLDM_TYPE_MESSAGE_CONTROL_AND_DISCOVERY    0x00
+#define PLDM_TYPE_SMBIOS                           0x01
+#define PLDM_TYPE_PLATFORM_MONITORING_AND_CONTROL  0x02
+#define PLDM_TYPE_BIOS_CONTROL_AND_CONFIGURATION   0x03
+
+#define PLDM_TRANSFER_FLAG_START          0x01
+#define PLDM_TRANSFER_FLAG_MIDDLE         0x02
+#define PLDM_TRANSFER_FLAG_END            0x04
+#define PLDM_TRANSFER_FLAG_START_AND_END  0x05
+
+#define PLDM_TRANSFER_OPERATION_FLAG_GET_NEXT_PART   0x00
+#define PLDM_TRANSFER_OPERATION_FLAG_GET_FIRST_PART  0x01
+#endif // PLDM_H_
-- 
2.37.1.windows.1