[edk2-platforms][PATCH V2 08/14] ManageabilityPkg: Add MCTP manageability header file

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

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

Add C header file of MCTP manageability transport
interface library.

Signed-off-by: Abner Chang <abner.chang@amd.com>
Cc: Isaac Oram <isaac.w.oram@intel.com>
Cc: Abdul Lateef Attar <abdattar@amd.com>
Cc: Nickle Wang <nicklew@nvidia.com>
Cc: Igor Kulchytskyy <igork@ami.com>
---
 .../Library/ManageabilityTransportMctpLib.h   | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 Features/ManageabilityPkg/Include/Library/ManageabilityTransportMctpLib.h

diff --git a/Features/ManageabilityPkg/Include/Library/ManageabilityTransportMctpLib.h b/Features/ManageabilityPkg/Include/Library/ManageabilityTransportMctpLib.h
new file mode 100644
index 0000000000..43bd142f4c
--- /dev/null
+++ b/Features/ManageabilityPkg/Include/Library/ManageabilityTransportMctpLib.h
@@ -0,0 +1,54 @@
+/** @file
+
+  This file defines the manageability MCTP protocol specific transport data.
+
+  Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef MANAGEABILITY_TRANSPORT_MCTP_LIB_H_
+#define MANAGEABILITY_TRANSPORT_MCTP_LIB_H_
+
+#include <Library/ManageabilityTransportLib.h>
+
+#define MCTP_KCS_HEADER_VERSION  0x01
+
+// According to SMBUS spec, the polynomial is:
+// C(x) = X^8 + X^2 + X^1 + 1, which is 0x107,
+// just ignore bit8 in definition.
+#define MCTP_KCS_PACKET_ERROR_CODE_POLY  0x07
+
+///
+/// The MCTP Message header which is apart from
+/// the payload.
+///
+
+typedef struct {
+  UINT8    IntegrityCheck : 1; ///< Message integrity check.
+  UINT8    MessageType    : 7; ///< Message type.
+} MANAGEABILITY_MCTP_MESSAGE_HEADER;
+
+typedef struct {
+  UINT8                                SourceEndpointId;
+  UINT8                                DestinationEndpointId;
+  MANAGEABILITY_MCTP_MESSAGE_HEADER    MessageHeader;
+} MANAGEABILITY_MCTP_TRANSPORT_HEADER;
+
+typedef struct {
+  UINT8    NetFunc;      ///< Message integrity check.
+  UINT8    DefiningBody; ///< Message type.
+  UINT8    ByteCount;    ///< Byte count of payload.
+} MANAGEABILITY_MCTP_KCS_HEADER;
+#define MCTP_KCS_NETFN_LUN                       0xb0
+#define DEFINING_BODY_DMTF_PRE_OS_WORKING_GROUP  0x01
+
+// This is used to track the response message. This value
+// is not defined by the specification.
+#define MCTP_MESSAGE_TAG  0x1
+
+#define MCTP_MESSAGE_TAG_OWNER_REQUEST   0x01
+#define MCTP_MESSAGE_TAG_OWNER_RESPONSE  0x01
+
+#define MCTP_PACKET_SEQUENCE_MASK  0x3
+
+#endif // MANAGEABILITY_TRANSPORT_MCTP_LIB_H_
-- 
2.37.1.windows.1