[PATCH v4 4/7] MdePkg: MmCommunication: Introduce EFI_PEI_MM_COMMUNICATION3_PPI to MdePkg

["Kun Qin" <kuqin12@gmail.com>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3398
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3430

This change introduces a new definition for MM communicate PPI v3.

This PPI will be installed under a new GUID in contrast to exisiting
EFI_PEI_MM_COMMUNICATION_PPI.

Data communicated to MM through EFI_PEI_MM_COMMUNICATION3_PPI should
always start with EFI_MM_COMMUNICATE_HEADER_V3 with its HeaderGuid,
Signature and Version fields properly populated.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Marvin Häuser <mhaeuser@posteo.de>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>

Signed-off-by: Kun Qin <kuqin12@gmail.com>
---

Notes:
    v3:
    - Newly introduced v3 communicate PPI
    
    v4:
    - Rebased with uncrustify changes.

 MdePkg/Include/Ppi/MmCommunication3.h | 57 ++++++++++++++++++++
 MdePkg/MdePkg.dec                     |  3 ++
 2 files changed, 60 insertions(+)

diff --git a/MdePkg/Include/Ppi/MmCommunication3.h b/MdePkg/Include/Ppi/MmCommunication3.h
new file mode 100644
index 000000000000..1cc75c38c012
--- /dev/null
+++ b/MdePkg/Include/Ppi/MmCommunication3.h
@@ -0,0 +1,57 @@
+/** @file
+  EFI MM Communication v3 PPI definition.
+
+  This Ppi provides a means of communicating between PEIM and MMI
+  handlers inside of MM.
+
+Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) Microsoft Corporation.
+
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef MM_COMMUNICATION3_PPI_H_
+#define MM_COMMUNICATION3_PPI_H_
+
+#include <Pi/PiMultiPhase.h>
+
+#define EFI_PEI_MM_COMMUNICATION3_PPI_GUID \
+  { \
+    0xe70febf6, 0x13ef, 0x4a21, { 0x89, 0x9e, 0xb2, 0x36, 0xf8, 0x25, 0xff, 0xc9 } \
+  }
+
+typedef struct _EFI_PEI_MM_COMMUNICATION3_PPI EFI_PEI_MM_COMMUNICATION3_PPI;
+
+/**
+  Communicates with a registered handler.
+
+  This function provides a service to send and receive messages from a registered UEFI service.
+
+  @param[in] This                The EFI_PEI_MM_COMMUNICATE3 instance.
+  @param[in, out] CommBuffer     A pointer to the buffer to convey into MMRAM.
+  @param[in, out] CommSize       The size of the data buffer being passed in.On exit, the size of data
+                                 being returned. Zero if the handler does not wish to reply with any data.
+
+  @retval EFI_SUCCESS            The message was successfully posted.
+  @retval EFI_INVALID_PARAMETER  The CommBuffer was NULL.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PEI_MM_COMMUNICATE3)(
+  IN CONST EFI_PEI_MM_COMMUNICATION3_PPI   *This,
+  IN OUT VOID                              *CommBuffer,
+  IN OUT UINTN                             *CommSize
+  );
+
+///
+/// EFI MM Communication PPI provides runtime services for communicating
+/// between DXE drivers and a registered SMI handler.
+///
+struct _EFI_PEI_MM_COMMUNICATION3_PPI {
+  EFI_PEI_MM_COMMUNICATE3    Communicate;
+};
+
+extern EFI_GUID  gEfiPeiMmCommunication3PpiGuid;
+
+#endif
diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index 8c61661e4ee7..cb42078fa330 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -1012,6 +1012,9 @@ [Ppis]
   ## Include/Ppi/DelayedDispatch.h
   gEfiPeiDelayedDispatchPpiGuid  = { 0x869c711d, 0x649c, 0x44fe, { 0x8b, 0x9e, 0x2c, 0xbb, 0x29, 0x11, 0xc3, 0xe6 }}
 
+  ## Include/Ppi/MmCommunication3.h
+  gEfiPeiMmCommunication3PpiGuid = { 0xe70febf6, 0x13ef, 0x4a21, { 0x89, 0x9e, 0xb2, 0x36, 0xf8, 0x25, 0xff, 0xc9 }}
+
 [Protocols]
   ## Include/Protocol/Pcd.h
   gPcdProtocolGuid               = { 0x11B34006, 0xD85B, 0x4D0A, { 0xA2, 0x90, 0xD5, 0xA5, 0x71, 0x31, 0x0E, 0xF7 }}
-- 
2.34.1.windows.1