Add a new CM object to describe memory devices and setup a new
Generator Library for SMBIOS Type17 table.

Signed-off-by: Girish Mahadevan <gmahadevan@...>
---
.../Include/ArmNameSpaceObjects.h | 59 +++
.../SmbiosType17Lib/SmbiosType17Generator.c | 338 ++++++++++++++++++
.../SmbiosType17Lib/SmbiosType17LibArm.inf | 32 ++
3 files changed, 429 insertions(+)
create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf

diff --git a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
index 102e0f96be..199a19e997 100644
--- a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
+++ b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
@@ -63,6 +63,7 @@ typedef enum ArmObjectID {
EArmObjPciInterruptMapInfo, ///< 39 - Pci Interrupt Map Info
EArmObjRmr, ///< 40 - Reserved Memory Range Node
EArmObjMemoryRangeDescriptor, ///< 41 - Memory Range Descriptor
+ EArmObjMemoryDeviceInfo, ///< 42 - Memory Device Information
EArmObjMax
} EARM_OBJECT_ID;

@@ -1070,6 +1071,64 @@ typedef struct CmArmRmrDescriptor {
UINT64 Length;
} CM_ARM_MEMORY_RANGE_DESCRIPTOR;

+/** A structure that describes the physical memory device.
+
+ The physical memory devices on the system are described by this object.
+
+ SMBIOS Specification v3.5.0 Type17
+
+ ID: EArmObjMemoryDeviceInfo,
+*/
+typedef struct CmArmMemoryDeviceInfo {
+ /** Size of the device.
+ Size of the device in bytes.
+ */
+ UINT64 Size;
+
+ /** Device Set */
+ UINT8 DeviceSet;
+
+ /** Speed of the device
+ Speed of the device in MegaTransfers/second.
+ */
+ UINT32 Speed;
+
+ /** Serial Number of device */
+ CHAR8 *SerialNum;
+
+ /** AssetTag identifying the device */
+ CHAR8 *AssetTag;
+
+ /** Device Locator String for the device.
+ String that describes the slot or position of the device on the board.
+ */
+ CHAR8 *DeviceLocator;
+
+ /** Bank locator string for the device.
+ String that describes the bank where the device is located.
+ */
+ CHAR8 *BankLocator;
+
+ /** Firmware version of the memory device */
+ CHAR8 *FirmwareVersion;
+
+ /** Manufacturer Id.
+ 2 byte Manufacturer Id as per JEDEC Standard JEP106AV
+ */
+ UINT16 ModuleManufacturerId;
+
+ /** Manufacturer Product Id
+ 2 byte Manufacturer Id as designated by Manufacturer.
+ */
+ UINT16 ModuleProductId;
+
+ /** Device Attributes */
+ UINT8 Attributes;
+
+ /** Device Configured Voltage in millivolts */
+ UINT16 ConfiguredVoltage;
+} CM_ARM_MEMORY_DEVICE_INFO;
+
#pragma pack()

#endif // ARM_NAMESPACE_OBJECTS_H_
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
new file mode 100644
index 0000000000..5683ca570f
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
@@ -0,0 +1,338 @@
+/** @file
+ SMBIOS Type17 Table Generator.
+
+ Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ Copyright (c) 2020 - 2021, Arm Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PrintLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/SmbiosType17FixupLib.h>
+
+// Module specific include files.
+#include <ConfigurationManagerObject.h>
+#include <ConfigurationManagerHelper.h>
+#include <Protocol/ConfigurationManagerProtocol.h>
+#include <Protocol/Smbios.h>
+#include <IndustryStandard/SmBios.h>
+
+/** This macro expands to a function that retrieves the Memory Device
+ information from the Configuration Manager.
+*/
+GET_OBJECT_LIST (
+ EObjNameSpaceArm,
+ EArmObjMemoryDeviceInfo,
+ CM_ARM_MEMORY_DEVICE_INFO
+ )
+
+// Default Values for Memory Device
+STATIC SMBIOS_TABLE_TYPE17 MemDeviceInfoTemplate = {
+ { // Hdr
+ EFI_SMBIOS_TYPE_MEMORY_DEVICE, // Type
+ sizeof (SMBIOS_TABLE_TYPE17), // Length
+ 0 // Handle
+ },
+ 0, // MemoryArrayHandle
+ 0, // MemoryErrorInformationHandle
+ 0xFFFF, // TotalWidth
+ 0xFFFF, // DataWIdth
+ 0x7FFF, // Size (always use Extended Size)
+ MemoryTypeUnknown, // FormFactor
+ 0xFF, // DeviceSet
+ 1, // Device Locator
+ 2, // Bank Locator
+ MemoryTypeSdram, // MemoryType
+ { // TypeDetail
+ 0
+ },
+ 0xFFFF, // Speed (Use Extended Speed)
+ 0, // Manufacturer
+ // (Unused Use ModuleManufactuerId)
+ 3, // SerialNumber
+ 4, // AssetTag
+ 0, // PartNumber
+ // (Unused Use ModuleProductId)
+ 0, // Attributes
+ 0, // ExtendedSize
+ 2000, // ConfiguredMemoryClockSpeed
+ 0, // MinimumVoltage
+ 0, // MaximumVoltage
+ 0, // ConfiguredVoltage
+ MemoryTechnologyDram, // MemoryTechnology
+ { // MemoryOperatingModeCapability
+ .Uint16 = 0x000
+ },
+ 5, // FirmwareVersion
+ 0, // ModuleManufacturerId
+ 0, // ModuleProductId
+ 0, // MemorySubsystemContollerManufacturerId
+ 0, // MemorySybsystemControllerProductId
+ 0, // NonVolatileSize
+ 0, // VolatileSize
+ 0, // CacheSize
+ 0, // LogicalSize
+ 0, // ExtendedSpeed
+ 0, // ExtendedConfiguredMemorySpeed
+};
+
+STATIC CHAR8 UnknownStr[] = "Unknown\0";
+
+STATIC
+EFI_STATUS
+EFIAPI
+FreeSmbiosType17TableEx (
+ IN CONST SMBIOS_TABLE_GENERATOR *CONST This,
+ IN CONST CM_STD_OBJ_SMBIOS_TABLE_INFO *CONST SmbiosTableInfo,
+ IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
+ IN OUT SMBIOS_STRUCTURE ***CONST Table,
+ IN CONST UINTN TableCount
+ )
+{
+ return EFI_SUCCESS;
+}
+
+/** Construct SMBIOS Type17 Table describing memory devices.
+
+ If this function allocates any resources then they must be freed
+ in the FreeXXXXTableResources function.
+
+ @param [in] This Pointer to the SMBIOS table generator.
+ @param [in] SmbiosTableInfo Pointer to the SMBIOS table information.
+ @param [in] CfgMgrProtocol Pointer to the Configuration Manager
+ Protocol interface.
+ @param [out] Table Pointer to the SMBIOS table.
+
+ @retval EFI_SUCCESS Table generated successfully.
+ @retval EFI_BAD_BUFFER_SIZE The size returned by the Configuration
+ Manager is less than the Object size for
+ the requested object.
+ @retval EFI_INVALID_PARAMETER A parameter is invalid.
+ @retval EFI_NOT_FOUND Could not find information.
+ @retval EFI_OUT_OF_RESOURCES Could not allocate memory.
+ @retval EFI_UNSUPPORTED Unsupported configuration.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+BuildSmbiosType17TableEx (
+ IN CONST SMBIOS_TABLE_GENERATOR *This,
+ IN CM_STD_OBJ_SMBIOS_TABLE_INFO *CONST SmbiosTableInfo,
+ IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
+ OUT SMBIOS_STRUCTURE ***Table,
+ OUT UINTN *CONST TableCount
+ )
+{
+ EFI_STATUS Status;
+ UINT32 NumMemDevices;
+ SMBIOS_STRUCTURE **TableList;
+ CM_ARM_MEMORY_DEVICE_INFO *MemoryDevicesInfo;
+ UINTN Index;
+ UINTN SerialNumLen;
+ CHAR8 *SerialNum;
+ UINTN AssetTagLen;
+ CHAR8 *AssetTag;
+ UINTN DeviceLocatorLen;
+ CHAR8 *DeviceLocator;
+ UINTN BankLocatorLen;
+ CHAR8 *BankLocator;
+ UINTN FirmwareVersionLen;
+ CHAR8 *FirmwareVersion;
+ CHAR8 *OptionalStrings;
+ SMBIOS_TABLE_TYPE17 *SmbiosRecord;
+
+ ASSERT (This != NULL);
+ ASSERT (SmbiosTableInfo != NULL);
+ ASSERT (CfgMgrProtocol != NULL);
+ ASSERT (Table != NULL);
+ ASSERT (TableCount != NULL);
+ ASSERT (SmbiosTableInfo->TableGeneratorId == This->GeneratorID);
+
+ DEBUG ((DEBUG_ERROR, "%a : Start \n", __FUNCTION__));
+ *Table = NULL;
+ Status = GetEArmObjMemoryDeviceInfo (
+ CfgMgrProtocol,
+ CM_NULL_TOKEN,
+ &MemoryDevicesInfo,
+ &NumMemDevices
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "Failed to get Memory Devices CM Object %r\n",
+ Status
+ ));
+ return Status;
+ }
+
+ TableList = (SMBIOS_STRUCTURE **)AllocateZeroPool (sizeof (SMBIOS_STRUCTURE *) * NumMemDevices);
+ if (TableList == NULL) {
+ DEBUG ((DEBUG_ERROR, "Failed to alloc memory for %u devices table\n"));
+ Status = EFI_OUT_OF_RESOURCES;
+ goto exit;
+ }
+
+ for (Index = 0; Index < NumMemDevices; Index++) {
+ if (MemoryDevicesInfo[Index].SerialNum != NULL) {
+ SerialNumLen = AsciiStrLen (MemoryDevicesInfo[Index].SerialNum);
+ SerialNum = MemoryDevicesInfo[Index].SerialNum;
+ } else {
+ SerialNumLen = AsciiStrLen (UnknownStr);
+ SerialNum = UnknownStr;
+ }
+
+ if (MemoryDevicesInfo[Index].AssetTag != NULL) {
+ AssetTagLen = AsciiStrLen (MemoryDevicesInfo[Index].AssetTag);
+ AssetTag = MemoryDevicesInfo[Index].AssetTag;
+ } else {
+ AssetTagLen = AsciiStrLen (UnknownStr);
+ AssetTag = UnknownStr;
+ }
+
+ if (MemoryDevicesInfo[Index].DeviceLocator != NULL) {
+ DeviceLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].DeviceLocator);
+ DeviceLocator = MemoryDevicesInfo[Index].DeviceLocator;
+ } else {
+ DeviceLocatorLen = AsciiStrLen (UnknownStr);
+ DeviceLocator = UnknownStr;
+ }
+
+ if (MemoryDevicesInfo[Index].BankLocator != NULL) {
+ BankLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].BankLocator);
+ BankLocator = MemoryDevicesInfo[Index].BankLocator;
+ } else {
+ BankLocatorLen = AsciiStrLen (UnknownStr);
+ BankLocator = UnknownStr;
+ }
+
+ if (MemoryDevicesInfo[Index].FirmwareVersion != NULL) {
+ FirmwareVersionLen = AsciiStrLen (MemoryDevicesInfo[Index].FirmwareVersion);
+ FirmwareVersion = MemoryDevicesInfo[Index].FirmwareVersion;
+ } else {
+ FirmwareVersionLen = AsciiStrLen (UnknownStr);
+ FirmwareVersion = UnknownStr;
+ }
+
+ SmbiosRecord = (SMBIOS_TABLE_TYPE17 *)AllocateZeroPool (
+ sizeof (SMBIOS_TABLE_TYPE17) +
+ SerialNumLen + 1 +
+ AssetTagLen + 1 + DeviceLocatorLen + 1 +
+ BankLocatorLen + 1 + FirmwareVersionLen + 1 + 1
+ );
+ if (SmbiosRecord == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto exit;
+ }
+
+ CopyMem (SmbiosRecord, &MemDeviceInfoTemplate, sizeof (SMBIOS_TABLE_TYPE17));
+ SmbiosRecord->ExtendedSize = MemoryDevicesInfo[Index].Size;
+ SmbiosRecord->DeviceSet = MemoryDevicesInfo[Index].DeviceSet;
+ SmbiosRecord->ModuleManufacturerID =
+ MemoryDevicesInfo[Index].ModuleManufacturerId;
+ SmbiosRecord->ModuleProductID =
+ MemoryDevicesInfo[Index].ModuleProductId;
+ SmbiosRecord->Attributes =
+ MemoryDevicesInfo[Index].Attributes;
+ SmbiosRecord->ExtendedSpeed = MemoryDevicesInfo[Index].Speed;
+ OptionalStrings = (CHAR8 *)(SmbiosRecord + 1);
+ AsciiSPrint (OptionalStrings, DeviceLocatorLen + 1, DeviceLocator);
+ OptionalStrings = OptionalStrings + DeviceLocatorLen + 1;
+ AsciiSPrint (OptionalStrings, BankLocatorLen + 1, BankLocator);
+ OptionalStrings = OptionalStrings + BankLocatorLen + 1;
+ AsciiSPrint (OptionalStrings, SerialNumLen + 1, SerialNum);
+ OptionalStrings = OptionalStrings + SerialNumLen + 1;
+ AsciiSPrint (OptionalStrings, AssetTagLen + 1, AssetTag);
+ OptionalStrings = OptionalStrings + AssetTagLen + 1;
+ AsciiSPrint (OptionalStrings, FirmwareVersionLen + 1, FirmwareVersion);
+ OptionalStrings = OptionalStrings + FirmwareVersionLen + 1;
+ TableList[Index] = (SMBIOS_STRUCTURE *)SmbiosRecord;
+ }
+
+ *Table = TableList;
+ *TableCount = NumMemDevices;
+
+exit:
+ DEBUG ((DEBUG_ERROR, "%a : Done \n", __FUNCTION__));
+ return Status;
+}
+
+/** The interface for the SMBIOS Type17 Table Generator.
+*/
+STATIC
+CONST
+SMBIOS_TABLE_GENERATOR SmbiosType17Generator = {
+ // Generator ID
+ CREATE_STD_SMBIOS_TABLE_GEN_ID (EStdSmbiosTableIdType17),
+ // Generator Description
+ L"SMBIOS.TYPE17.GENERATOR",
+ // SMBIOS Table Type
+ EFI_SMBIOS_TYPE_MEMORY_DEVICE,
+ NULL,
+ NULL,
+ // Build table function Extended.
+ BuildSmbiosType17TableEx,
+ // Free function Extended.
+ FreeSmbiosType17TableEx
+};
+
+/** Register the Generator with the SMBIOS Table Factory.
+
+ @param [in] ImageHandle The handle to the image.
+ @param [in] SystemTable Pointer to the System Table.
+
+ @retval EFI_SUCCESS The Generator is registered.
+ @retval EFI_INVALID_PARAMETER A parameter is invalid.
+ @retval EFI_ALREADY_STARTED The Generator for the Table ID
+ is already registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = RegisterSmbiosTableGenerator (&SmbiosType17Generator);
+ DEBUG ((
+ DEBUG_INFO,
+ "SMBIOS Type 17: Register Generator. Status = %r\n",
+ Status
+ ));
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
+
+/** Deregister the Generator from the SMBIOS Table Factory.
+
+ @param [in] ImageHandle The handle to the image.
+ @param [in] SystemTable Pointer to the System Table.
+
+ @retval EFI_SUCCESS The Generator is deregistered.
+ @retval EFI_INVALID_PARAMETER A parameter is invalid.
+ @retval EFI_NOT_FOUND The Generator is not registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibDestructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = DeregisterSmbiosTableGenerator (&SmbiosType17Generator);
+ DEBUG ((
+ DEBUG_INFO,
+ "SMBIOS Type17: Deregister Generator. Status = %r\n",
+ Status
+ ));
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+}
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
new file mode 100644
index 0000000000..78a80b75f0
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
@@ -0,0 +1,32 @@
+## @file
+# SMBIOS Type17 Table Generator
+#
+# Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# Copyright (c) 2019 - 2021, Arm Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+ INF_VERSION = 0x0001001B
+ BASE_NAME = SmbiosType17LibArm
+ FILE_GUID = 1f063bac-f8f1-4e08-8ffd-9aae52c75497
+ VERSION_STRING = 1.0
+ MODULE_TYPE = DXE_DRIVER
+ LIBRARY_CLASS = NULL|DXE_DRIVER
+ CONSTRUCTOR = SmbiosType17LibConstructor
+ DESTRUCTOR = SmbiosType17LibDestructor
+
+[Sources]
+ SmbiosType17Generator.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ ArmPlatformPkg/ArmPlatformPkg.dec
+ DynamicTablesPkg/DynamicTablesPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DebugLib
--
2.17.1

Hi Girish,

Thank you for this patch and for the effort for bringing forward dynamic SMBIOS generation.

Please find my feedback inline marked [SAMI].

Regards,

Sami Mujawar

On 26/08/2022 06:37 pm, Girish Mahadevan wrote:

Add a new CM object to describe memory devices and setup a new
Generator Library for SMBIOS Type17 table.

Signed-off-by: Girish Mahadevan<gmahadevan@...>
---
.../Include/ArmNameSpaceObjects.h | 59 +++
.../SmbiosType17Lib/SmbiosType17Generator.c | 338 ++++++++++++++++++
.../SmbiosType17Lib/SmbiosType17LibArm.inf | 32 ++
3 files changed, 429 insertions(+)
create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf

diff --git a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
index 102e0f96be..199a19e997 100644
--- a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
+++ b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
@@ -63,6 +63,7 @@ typedef enum ArmObjectID {
EArmObjPciInterruptMapInfo, ///< 39 - Pci Interrupt Map Info
EArmObjRmr, ///< 40 - Reserved Memory Range Node
EArmObjMemoryRangeDescriptor, ///< 41 - Memory Range Descriptor
+ EArmObjMemoryDeviceInfo, ///< 42 - Memory Device Information
EArmObjMax
} EARM_OBJECT_ID;
@@ -1070,6 +1071,64 @@ typedef struct CmArmRmrDescriptor {
UINT64 Length;
} CM_ARM_MEMORY_RANGE_DESCRIPTOR;
+/** A structure that describes the physical memory device.
+
+ The physical memory devices on the system are described by this object.
+
+ SMBIOS Specification v3.5.0 Type17
+
+ ID: EArmObjMemoryDeviceInfo,
+*/
+typedef struct CmArmMemoryDeviceInfo {

[SAMI] I think we may need a Token pointing to the Type 16 object so that the Physical Memory Array Handle can be setup, see my comment below about the HandleManager.

+ /** Size of the device.
+ Size of the device in bytes.
+ */
+ UINT64 Size;
+
+ /** Device Set */
+ UINT8 DeviceSet;
+
+ /** Speed of the device
+ Speed of the device in MegaTransfers/second.
+ */
+ UINT32 Speed;
+
+ /** Serial Number of device */
+ CHAR8 *SerialNum;
+
+ /** AssetTag identifying the device */
+ CHAR8 *AssetTag;
+
+ /** Device Locator String for the device.
+ String that describes the slot or position of the device on the board.
+ */
+ CHAR8 *DeviceLocator;
+
+ /** Bank locator string for the device.
+ String that describes the bank where the device is located.
+ */
+ CHAR8 *BankLocator;
+
+ /** Firmware version of the memory device */
+ CHAR8 *FirmwareVersion;
+
+ /** Manufacturer Id.
+ 2 byte Manufacturer Id as per JEDEC Standard JEP106AV
+ */
+ UINT16 ModuleManufacturerId;
+
+ /** Manufacturer Product Id
+ 2 byte Manufacturer Id as designated by Manufacturer.
+ */
+ UINT16 ModuleProductId;
+
+ /** Device Attributes */
+ UINT8 Attributes;
+
+ /** Device Configured Voltage in millivolts */
+ UINT16 ConfiguredVoltage;

[SAMI] This field does not appear to be used in the generator. If the intention is to use this in the future, then it may be better to add this at a later stage.

+} CM_ARM_MEMORY_DEVICE_INFO;
+
#pragma pack()
#endif // ARM_NAMESPACE_OBJECTS_H_
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
new file mode 100644
index 0000000000..5683ca570f
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
@@ -0,0 +1,338 @@
+/** @file
+ SMBIOS Type17 Table Generator.
+
+ Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ Copyright (c) 2020 - 2021, Arm Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PrintLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/SmbiosType17FixupLib.h>

[SAMI] I could not find SmbiosType17FixupLib.h in this patch series. Can you check, please?

+
+// Module specific include files.
+#include <ConfigurationManagerObject.h>
+#include <ConfigurationManagerHelper.h>
+#include <Protocol/ConfigurationManagerProtocol.h>
+#include <Protocol/Smbios.h>

[SAMI] I think Protocol/Smbios.h may not be required in this file. Can you check, please?

+#include <IndustryStandard/SmBios.h>
+
+/** This macro expands to a function that retrieves the Memory Device
+ information from the Configuration Manager.
+*/
+GET_OBJECT_LIST (
+ EObjNameSpaceArm,
+ EArmObjMemoryDeviceInfo,
+ CM_ARM_MEMORY_DEVICE_INFO
+ )
+
+// Default Values for Memory Device
+STATIC SMBIOS_TABLE_TYPE17 MemDeviceInfoTemplate = {
+ { // Hdr
+ EFI_SMBIOS_TYPE_MEMORY_DEVICE, // Type
+ sizeof (SMBIOS_TABLE_TYPE17), // Length
+ 0 // Handle
+ },
+ 0, // MemoryArrayHandle

[SAMI] Do you have any thoughts on how the MemoryArrayHandle can be setup?

The same applies for the following MemoryErrorInformationHandle field.

I think we need some sort of a HandleManager in DynamicTablesFramework that can keep track of the mappings between SMBIOS Objects and Table Handles.

e.g. Smbios - HandleManager

+-------------------------------+-------------------------------+

      |    Object Token               | Table Handle                  |

+-------------------------------+-------------------------------+

      | Type16Obj_token         | Type 16 Table handle    |

+-------------------------------+-------------------------------+

      ...

- The Type17Object i.e. CM_ARM_MEMORY_DEVICE_INFO can then hold a token for the Type16Object.

 - If Type 17 table is to be installed, DynamicTablemanager shall search the SMBIOS table list to see if a Type16 table is requested to be installed.

- If a Type16 table is present in the list of SMBIOS table to install, the Type16 table shall be installed first and an entry is made in the Smbios HandleManager to create a mapping of Type16Obj_token  <==> Type16 Table Handle.

- The Type17 table can now be built and if a the Type16Object token is provided in CM_ARM_MEMORY_DEVICE_INFO, the Smbios HandleManager shall be searched (using Type16Obj_token) to retrieve the Type16 Table handle and populate the Type 17 Physical Memory Array Handle field.

I think we may have to experiment a bit before we arrive at the correct design. However, please do let me know your thoughts on the above.

[SAMI]

+ 0, // MemoryErrorInformationHandle
+ 0xFFFF, // TotalWidth
+ 0xFFFF, // DataWIdth

[SAMI] I need to find out how these fields should be populated, but the Annex A, SMBIOS specification version 3.6.0 says the following:

4.8.4 Total Width is not 0FFFFh (Unknown) if the memory device is installed. (Size is not 0.)

4.8.5 Data Width is not 0FFFFh (Unknown).

Can you explain how this field is used, please?

[/SAMI]

+ 0x7FFF, // Size (always use Extended Size)

[SAMI] I think this field should be set based on the Size.

The spec says "If the size is 32 GB-1 MB or greater, the field value is 7FFFh and the actual size is stored in the Extended Size field."

I think it would be good to have a static function  that encodes the size in wither the Size field or the Extended Size field.

e.g. UpdateSmbiosTable17Size (SMBIOS_TABLE_TYPE17 *SmbiosRecord, UINTN Size) {

         if (Size > 32GB-1MB) {

            SmbiosRecord->Size = EncodeSize (xxx);

          } else {

             SmbiosRecord->ExtendedSize = EncodeExtendedSize (xxx);

         }

    }

[/SAMI]

+ MemoryTypeUnknown, // FormFactor
+ 0xFF, // DeviceSet
+ 1, // Device Locator
+ 2, // Bank Locator
+ MemoryTypeSdram, // MemoryType
+ { // TypeDetail
+ 0
+ },
+ 0xFFFF, // Speed (Use Extended Speed)

[SAMI] Maybe we need a helper function (similar to UpdateSmbiosTable17Size()) for this field as well.

+ 0, // Manufacturer
+ // (Unused Use ModuleManufactuerId)
+ 3, // SerialNumber
+ 4, // AssetTag
+ 0, // PartNumber
+ // (Unused Use ModuleProductId)
+ 0, // Attributes
+ 0, // ExtendedSize
+ 2000, // ConfiguredMemoryClockSpeed

[SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?

+ 0, // MinimumVoltage
+ 0, // MaximumVoltage
+ 0, // ConfiguredVoltage
+ MemoryTechnologyDram, // MemoryTechnology

[SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?

+ { // MemoryOperatingModeCapability
+ .Uint16 = 0x000
+ },

[SAMI] I think the above initialisation may not be portable.

+ 5, // FirmwareVersion
+ 0, // ModuleManufacturerId
+ 0, // ModuleProductId
+ 0, // MemorySubsystemContollerManufacturerId
+ 0, // MemorySybsystemControllerProductId
+ 0, // NonVolatileSize
+ 0, // VolatileSize
+ 0, // CacheSize
+ 0, // LogicalSize
+ 0, // ExtendedSpeed
+ 0, // ExtendedConfiguredMemorySpeed
+};
+
+STATIC CHAR8 UnknownStr[] = "Unknown\0";

[SAMI] Would it be possible to add the CONST qualifier, please?

+
+STATIC
+EFI_STATUS
+EFIAPI
+FreeSmbiosType17TableEx (
+ IN CONST SMBIOS_TABLE_GENERATOR *CONST This,
+ IN CONST CM_STD_OBJ_SMBIOS_TABLE_INFO *CONST SmbiosTableInfo,
+ IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
+ IN OUT SMBIOS_STRUCTURE ***CONST Table,
+ IN CONST UINTN TableCount
+ )
+{
+ return EFI_SUCCESS;
+}
+
+/** Construct SMBIOS Type17 Table describing memory devices.
+
+ If this function allocates any resources then they must be freed
+ in the FreeXXXXTableResources function.
+
+ @param [in] This Pointer to the SMBIOS table generator.
+ @param [in] SmbiosTableInfo Pointer to the SMBIOS table information.
+ @param [in] CfgMgrProtocol Pointer to the Configuration Manager
+ Protocol interface.
+ @param [out] Table Pointer to the SMBIOS table.
+
+ @retval EFI_SUCCESS Table generated successfully.
+ @retval EFI_BAD_BUFFER_SIZE The size returned by the Configuration
+ Manager is less than the Object size for
+ the requested object.
+ @retval EFI_INVALID_PARAMETER A parameter is invalid.
+ @retval EFI_NOT_FOUND Could not find information.
+ @retval EFI_OUT_OF_RESOURCES Could not allocate memory.
+ @retval EFI_UNSUPPORTED Unsupported configuration.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+BuildSmbiosType17TableEx (
+ IN CONST SMBIOS_TABLE_GENERATOR *This,
+ IN CM_STD_OBJ_SMBIOS_TABLE_INFO *CONST SmbiosTableInfo,
+ IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
+ OUT SMBIOS_STRUCTURE ***Table,
+ OUT UINTN *CONST TableCount
+ )
+{
+ EFI_STATUS Status;
+ UINT32 NumMemDevices;
+ SMBIOS_STRUCTURE **TableList;
+ CM_ARM_MEMORY_DEVICE_INFO *MemoryDevicesInfo;
+ UINTN Index;
+ UINTN SerialNumLen;
+ CHAR8 *SerialNum;
+ UINTN AssetTagLen;
+ CHAR8 *AssetTag;
+ UINTN DeviceLocatorLen;
+ CHAR8 *DeviceLocator;
+ UINTN BankLocatorLen;
+ CHAR8 *BankLocator;
+ UINTN FirmwareVersionLen;
+ CHAR8 *FirmwareVersion;
+ CHAR8 *OptionalStrings;
+ SMBIOS_TABLE_TYPE17 *SmbiosRecord;
+
+ ASSERT (This != NULL);
+ ASSERT (SmbiosTableInfo != NULL);
+ ASSERT (CfgMgrProtocol != NULL);
+ ASSERT (Table != NULL);
+ ASSERT (TableCount != NULL);
+ ASSERT (SmbiosTableInfo->TableGeneratorId == This->GeneratorID);
+
+ DEBUG ((DEBUG_ERROR, "%a : Start \n", __FUNCTION__));
+ *Table = NULL;
+ Status = GetEArmObjMemoryDeviceInfo (
+ CfgMgrProtocol,
+ CM_NULL_TOKEN,
+ &MemoryDevicesInfo,
+ &NumMemDevices
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "Failed to get Memory Devices CM Object %r\n",
+ Status
+ ));
+ return Status;
+ }
+
+ TableList = (SMBIOS_STRUCTURE **)AllocateZeroPool (sizeof (SMBIOS_STRUCTURE *) * NumMemDevices);

[SAMI] The memory allocated here should be freed in FreeSmbiosType17TableEx.

+ if (TableList == NULL) {
+ DEBUG ((DEBUG_ERROR, "Failed to alloc memory for %u devices table\n"));
+ Status = EFI_OUT_OF_RESOURCES;
+ goto exit;
+ }
+
+ for (Index = 0; Index < NumMemDevices; Index++) {
+ if (MemoryDevicesInfo[Index].SerialNum != NULL) {
+ SerialNumLen = AsciiStrLen (MemoryDevicesInfo[Index].SerialNum);
+ SerialNum = MemoryDevicesInfo[Index].SerialNum;
+ } else {
+ SerialNumLen = AsciiStrLen (UnknownStr);
+ SerialNum = UnknownStr;

[SAMI] If the serial number is not provided, then should the string field be set to 0?

See Section 6.1.3, SMBIOS Spec Version 3.6.0 which states

"If a string field references no string, a null (0) is placed in that string field."

[/SAMI]

+ }
+
+ if (MemoryDevicesInfo[Index].AssetTag != NULL) {
+ AssetTagLen = AsciiStrLen (MemoryDevicesInfo[Index].AssetTag);
+ AssetTag = MemoryDevicesInfo[Index].AssetTag;
+ } else {
+ AssetTagLen = AsciiStrLen (UnknownStr);
+ AssetTag = UnknownStr;
+ }
+
+ if (MemoryDevicesInfo[Index].DeviceLocator != NULL) {
+ DeviceLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].DeviceLocator);
+ DeviceLocator = MemoryDevicesInfo[Index].DeviceLocator;
+ } else {
+ DeviceLocatorLen = AsciiStrLen (UnknownStr);
+ DeviceLocator = UnknownStr;
+ }
+
+ if (MemoryDevicesInfo[Index].BankLocator != NULL) {
+ BankLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].BankLocator);
+ BankLocator = MemoryDevicesInfo[Index].BankLocator;
+ } else {
+ BankLocatorLen = AsciiStrLen (UnknownStr);
+ BankLocator = UnknownStr;
+ }
+
+ if (MemoryDevicesInfo[Index].FirmwareVersion != NULL) {
+ FirmwareVersionLen = AsciiStrLen (MemoryDevicesInfo[Index].FirmwareVersion);
+ FirmwareVersion = MemoryDevicesInfo[Index].FirmwareVersion;
+ } else {
+ FirmwareVersionLen = AsciiStrLen (UnknownStr);
+ FirmwareVersion = UnknownStr;
+ }
+
+ SmbiosRecord = (SMBIOS_TABLE_TYPE17 *)AllocateZeroPool (
+ sizeof (SMBIOS_TABLE_TYPE17) +
+ SerialNumLen + 1 +
+ AssetTagLen + 1 + DeviceLocatorLen + 1 +
+ BankLocatorLen + 1 + FirmwareVersionLen + 1 + 1
+ );

[SAMI] The memory allocated here needs to be freed in FreeSmbiosType17TableEx as  SmbiosProtocol->Add () makes a copy of the SmbiosTable, see https://github.com/tianocore/edk2/blob/master/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c#L476 and https://github.com/tianocore/edk2/blob/master/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c#L516.

+ if (SmbiosRecord == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto exit;
+ }
+
+ CopyMem (SmbiosRecord, &MemDeviceInfoTemplate, sizeof (SMBIOS_TABLE_TYPE17));
+ SmbiosRecord->ExtendedSize = MemoryDevicesInfo[Index].Size;

[SAMI] CM_ARM_MEMORY_DEVICE_INFO.Size is documented as size in bytes, while looking at the SMBIOS specification, section 7.18.5 for the Extended Size Bits 30:0 represent the size of the memory device in megabytes.

I think it will be useful to create UpdateSmbiosTable17Size() which does the appropriate encoding and updation of the SMBIOS table fieds.

[/SAMI]

+ SmbiosRecord->DeviceSet = MemoryDevicesInfo[Index].DeviceSet;
+ SmbiosRecord->ModuleManufacturerID =
+ MemoryDevicesInfo[Index].ModuleManufacturerId;
+ SmbiosRecord->ModuleProductID =
+ MemoryDevicesInfo[Index].ModuleProductId;
+ SmbiosRecord->Attributes =
+ MemoryDevicesInfo[Index].Attributes;
+ SmbiosRecord->ExtendedSpeed = MemoryDevicesInfo[Index].Speed;
+ OptionalStrings = (CHAR8 *)(SmbiosRecord + 1);
+ AsciiSPrint (OptionalStrings, DeviceLocatorLen + 1, DeviceLocator);

[SAMI] I think we can simplify the publishing of the SMBIOS strings using SmbiosStringTableLib. Please see the patch at https://edk2.groups.io/g/devel/message/93651

+ OptionalStrings = OptionalStrings + DeviceLocatorLen + 1;
+ AsciiSPrint (OptionalStrings, BankLocatorLen + 1, BankLocator);
+ OptionalStrings = OptionalStrings + BankLocatorLen + 1;
+ AsciiSPrint (OptionalStrings, SerialNumLen + 1, SerialNum);
+ OptionalStrings = OptionalStrings + SerialNumLen + 1;
+ AsciiSPrint (OptionalStrings, AssetTagLen + 1, AssetTag);
+ OptionalStrings = OptionalStrings + AssetTagLen + 1;
+ AsciiSPrint (OptionalStrings, FirmwareVersionLen + 1, FirmwareVersion);
+ OptionalStrings = OptionalStrings + FirmwareVersionLen + 1;
+ TableList[Index] = (SMBIOS_STRUCTURE *)SmbiosRecord;
+ }
+
+ *Table = TableList;
+ *TableCount = NumMemDevices;
+
+exit:
+ DEBUG ((DEBUG_ERROR, "%a : Done \n", __FUNCTION__));
+ return Status;
+}
+
+/** The interface for the SMBIOS Type17 Table Generator.
+*/
+STATIC
+CONST
+SMBIOS_TABLE_GENERATOR SmbiosType17Generator = {
+ // Generator ID
+ CREATE_STD_SMBIOS_TABLE_GEN_ID (EStdSmbiosTableIdType17),
+ // Generator Description
+ L"SMBIOS.TYPE17.GENERATOR",
+ // SMBIOS Table Type
+ EFI_SMBIOS_TYPE_MEMORY_DEVICE,
+ NULL,
+ NULL,
+ // Build table function Extended.
+ BuildSmbiosType17TableEx,
+ // Free function Extended.
+ FreeSmbiosType17TableEx
+};
+
+/** Register the Generator with the SMBIOS Table Factory.
+
+ @param [in] ImageHandle The handle to the image.
+ @param [in] SystemTable Pointer to the System Table.
+
+ @retval EFI_SUCCESS The Generator is registered.
+ @retval EFI_INVALID_PARAMETER A parameter is invalid.
+ @retval EFI_ALREADY_STARTED The Generator for the Table ID
+ is already registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = RegisterSmbiosTableGenerator (&SmbiosType17Generator);
+ DEBUG ((
+ DEBUG_INFO,
+ "SMBIOS Type 17: Register Generator. Status = %r\n",
+ Status
+ ));
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
+
+/** Deregister the Generator from the SMBIOS Table Factory.
+
+ @param [in] ImageHandle The handle to the image.
+ @param [in] SystemTable Pointer to the System Table.
+
+ @retval EFI_SUCCESS The Generator is deregistered.
+ @retval EFI_INVALID_PARAMETER A parameter is invalid.
+ @retval EFI_NOT_FOUND The Generator is not registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibDestructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = DeregisterSmbiosTableGenerator (&SmbiosType17Generator);
+ DEBUG ((
+ DEBUG_INFO,
+ "SMBIOS Type17: Deregister Generator. Status = %r\n",
+ Status
+ ));
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+}
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
new file mode 100644
index 0000000000..78a80b75f0
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
@@ -0,0 +1,32 @@
+## @file
+# SMBIOS Type17 Table Generator
+#
+# Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# Copyright (c) 2019 - 2021, Arm Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+ INF_VERSION = 0x0001001B
+ BASE_NAME = SmbiosType17LibArm
+ FILE_GUID = 1f063bac-f8f1-4e08-8ffd-9aae52c75497
+ VERSION_STRING = 1.0
+ MODULE_TYPE = DXE_DRIVER
+ LIBRARY_CLASS = NULL|DXE_DRIVER
+ CONSTRUCTOR = SmbiosType17LibConstructor
+ DESTRUCTOR = SmbiosType17LibDestructor
+
+[Sources]
+ SmbiosType17Generator.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ ArmPlatformPkg/ArmPlatformPkg.dec
+ DynamicTablesPkg/DynamicTablesPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DebugLib

[AMD Official Use Only - General]

One question in below with tag [Abner],

Hi Abner,

Please see my response inline marked [SAMI].

Regards,

Sami Mujawar

On 13/09/2022, 04:00, "Chang, Abner" <Abner.Chang@...> wrote:

[AMD Official Use Only - General]

One question in below with tag [Abner],

[AMD Official Use Only - General]

Hello Sami

Thank you so much for your review, I apologize for the late response.

My comment in line about the handle manager [GM].

Best Regards
Girish

On 9/12/2022 8:57 AM, Sami Mujawar wrote:

External email: Use caution opening links or attachments
Hi Girish,
Thank you for this patch and for the effort for bringing forward dynamic
SMBIOS generation.
Please find my feedback inline marked [SAMI].
Regards,
Sami Mujawar
On 26/08/2022 06:37 pm, Girish Mahadevan wrote:

Add a new CM object to describe memory devices and setup a new
Generator Library for SMBIOS Type17 table.

Signed-off-by: Girish Mahadevan<gmahadevan@...>
---
  .../Include/ArmNameSpaceObjects.h             |  59 +++
  .../SmbiosType17Lib/SmbiosType17Generator.c   | 338 ++++++++++++++++++
  .../SmbiosType17Lib/SmbiosType17LibArm.inf    |  32 ++
  3 files changed, 429 insertions(+)
  create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
  create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf

diff --git a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
index 102e0f96be..199a19e997 100644
--- a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
+++ b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
@@ -63,6 +63,7 @@ typedef enum ArmObjectID {
    EArmObjPciInterruptMapInfo,          ///< 39 - Pci Interrupt Map Info
    EArmObjRmr,                          ///< 40 - Reserved Memory Range Node
    EArmObjMemoryRangeDescriptor,        ///< 41 - Memory Range Descriptor
+  EArmObjMemoryDeviceInfo,             ///< 42 - Memory Device Information
    EArmObjMax
  } EARM_OBJECT_ID;

@@ -1070,6 +1071,64 @@ typedef struct CmArmRmrDescriptor {
    UINT64    Length;
  } CM_ARM_MEMORY_RANGE_DESCRIPTOR;

+/** A structure that describes the physical memory device.
+
+  The physical memory devices on the system are described by this object.
+
+  SMBIOS Specification v3.5.0 Type17
+
+  ID: EArmObjMemoryDeviceInfo,
+*/
+typedef struct CmArmMemoryDeviceInfo {

[SAMI] I think we may need a Token pointing to the Type 16 object so
that the Physical Memory Array Handle can be setup, see my comment below
about the HandleManager.

+  /** Size of the device.
+    Size of the device in bytes.
+  */
+  UINT64  Size;
+
+  /** Device Set */
+  UINT8   DeviceSet;
+
+  /** Speed of the device
+    Speed of the device in MegaTransfers/second.
+  */
+  UINT32  Speed;
+
+  /** Serial Number of device  */
+  CHAR8   *SerialNum;
+
+  /** AssetTag identifying the device */
+  CHAR8   *AssetTag;
+
+  /** Device Locator String for the device.
+   String that describes the slot or position of the device on the board.
+   */
+  CHAR8   *DeviceLocator;
+
+  /** Bank locator string for the device.
+   String that describes the bank where the device is located.
+   */
+  CHAR8   *BankLocator;
+
+  /** Firmware version of the memory device */
+  CHAR8   *FirmwareVersion;
+
+  /** Manufacturer Id.
+   2 byte Manufacturer Id as per JEDEC Standard JEP106AV
+  */
+  UINT16  ModuleManufacturerId;
+
+  /** Manufacturer Product Id
+   2 byte Manufacturer Id as designated by Manufacturer.
+  */
+  UINT16  ModuleProductId;
+
+  /** Device Attributes */
+  UINT8   Attributes;
+
+  /** Device Configured Voltage in millivolts */
+  UINT16  ConfiguredVoltage;

[SAMI] This field does not appear to be used in the generator. If the
intention is to use this in the future, then it may be better to add
this at a later stage.

+} CM_ARM_MEMORY_DEVICE_INFO;
+
  #pragma pack()

  #endif // ARM_NAMESPACE_OBJECTS_H_
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
new file mode 100644
index 0000000000..5683ca570f
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
@@ -0,0 +1,338 @@
+/** @file
+  SMBIOS Type17 Table Generator.
+
+  Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+  Copyright (c) 2020 - 2021, Arm Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PrintLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/SmbiosType17FixupLib.h>

[SAMI] I could not find SmbiosType17FixupLib.h in this patch series. Can
you check, please?

+
+// Module specific include files.
+#include <ConfigurationManagerObject.h>
+#include <ConfigurationManagerHelper.h>
+#include <Protocol/ConfigurationManagerProtocol.h>
+#include <Protocol/Smbios.h>

[SAMI] I think Protocol/Smbios.h may not be required in this file. Can
you check, please?

+#include <IndustryStandard/SmBios.h>
+
+/** This macro expands to a function that retrieves the Memory Device
+    information from the Configuration Manager.
+*/
+GET_OBJECT_LIST (
+  EObjNameSpaceArm,
+  EArmObjMemoryDeviceInfo,
+  CM_ARM_MEMORY_DEVICE_INFO
+  )
+
+// Default Values for Memory Device
+STATIC SMBIOS_TABLE_TYPE17 MemDeviceInfoTemplate = {
+  {                                      // Hdr
+    EFI_SMBIOS_TYPE_MEMORY_DEVICE,       // Type
+    sizeof (SMBIOS_TABLE_TYPE17),        // Length
+    0                                    // Handle
+  },
+  0,                                     // MemoryArrayHandle

[SAMI] Do you have any thoughts on how the MemoryArrayHandle can be setup?
The same applies for the following MemoryErrorInformationHandle field.
I think we need some sort of a HandleManager in DynamicTablesFramework
that can keep track of the mappings between SMBIOS Objects and Table
Handles.
e.g. Smbios - HandleManager
+-------------------------------+-------------------------------+
      |    Object Token               | Table Handle                  |
+-------------------------------+-------------------------------+
      | Type16Obj_token         | Type 16 Table handle    |
+-------------------------------+-------------------------------+
      ...
- The Type17Object i.e. CM_ARM_MEMORY_DEVICE_INFO can then hold a token
for the Type16Object.
 - If Type 17 table is to be installed, DynamicTablemanager shall
search the SMBIOS table list to see if a Type16 table is requested to be
installed.
- If a Type16 table is present in the list of SMBIOS table to install,
the Type16 table shall be installed first and an entry is made in the
Smbios HandleManager to create a mapping of Type16Obj_token  <==> Type16
Table Handle.
- The Type17 table can now be built and if a the Type16Object token is
provided in CM_ARM_MEMORY_DEVICE_INFO, the Smbios HandleManager shall be
searched (using Type16Obj_token) to retrieve the Type16 Table handle and
populate the Type 17 Physical Memory Array Handle field.
I think we may have to experiment a bit before we arrive at the correct
design. However, please do let me know your thoughts on the above.

[GM] I agree with the idea of having a map of CM_OBJECT_TOKENs to SMBIOS handles. I've added this to the DynamicTableFactoryProtocol.

However when it comes to actually figuring out and adding the reference SMBIOS handle We've come up with a slightly different approach.

If I understood what you were saying above is:
If we happen to parse a Type17 table
if that Type17 table has a token to a Physical memory array CM_OBJ
if there is an existing Smbios Handle (look up this handle using
the CM_OBJECT_TOKEN)
then use this handle.
else if there is a generator for Type16 registered
call the Type16 generator code first

IMO this gets a bit difficult to manage. Right now the DynamicTableManagerDxe walks the array of EStdObjSmbiosTableList CM objects, finds the generator for each Table, invokes it, gets an SMBIOS record that it then installs via the SmbiosDxe driver.
It seemed a bit convoluted to call the generator and install an SMBIOS table while within the generator of another Smbios table.
And if there are layers of dependencies (or multiple dependencies) it could add to the complexities.

Instead what we came up with is:

If we happen to parse a Type17 table
if that Type17 table has a token to a Physical memory array CM_OBJ
if there is an existing Smbios Handle (look up this handle using
the CM_OBJECT_TOKEN )
then use this handle.
else if there is a generator for Type16 Registered
Generate an SMBIOS handle [since SmbiosDxe maintains the
handle DB privately I had to
pick a handle and check if it
clashes with existing records]
Add this SMBIOS handle to the map.
else // No generator present
Proceed without adding any reference


Before Adding any SMBIOS table, we check if there is an existing SMBIOS handle for the CM_OBJECT_TOKEN (the generator will return a CM_OBJECT_TOKEN for each SMBIOS record created).
If there is an existing SMBIOS handle, pass that in, else pass in SMBIOS_HANDLE_PI_RESERVED and let SmbiosDxe assign the handle.

Here is a sample implementation of this approach (it is a WIP, but I wanted to get your thoughts on it)

https://github.com/tianocore/edk2/compare/master...gmahadevan:edk2-upstream:RFC/smbios-dyntables

Sorry for the long message, please let me know your thoughts.

[/GM]

[SAMI]

+  0,                                     // MemoryErrorInformationHandle
+  0xFFFF,                                // TotalWidth
+  0xFFFF,                                // DataWIdth

[SAMI] I need to find out how these fields should be populated, but the
Annex A, SMBIOS specification version 3.6.0 says the following:
4.8.4 Total Width is not 0FFFFh (Unknown) if the memory device is
installed. (Size is not 0.)
4.8.5 Data Width is not 0FFFFh (Unknown).
Can you explain how this field is used, please?
[/SAMI]

+  0x7FFF,                                // Size (always use Extended Size)

[SAMI] I think this field should be set based on the Size.
The spec says "If the size is 32 GB-1 MB or greater, the field value is
7FFFh and the actual size is stored in the Extended Size field."
I think it would be good to have a static function  that encodes the
size in wither the Size field or the Extended Size field.
e.g. UpdateSmbiosTable17Size (SMBIOS_TABLE_TYPE17 *SmbiosRecord, UINTN
Size) {
         if (Size > 32GB-1MB) {
            SmbiosRecord->Size = EncodeSize (xxx);
          } else {
             SmbiosRecord->ExtendedSize = EncodeExtendedSize (xxx);
         }
    }
[/SAMI]

+  MemoryTypeUnknown,                     // FormFactor
+  0xFF,                                  // DeviceSet
+  1,                                     // Device Locator
+  2,                                     // Bank Locator
+  MemoryTypeSdram,                       // MemoryType
+  {                                      // TypeDetail
+    0
+  },
+  0xFFFF,                                // Speed (Use Extended Speed)

[SAMI] Maybe we need a helper function (similar to
UpdateSmbiosTable17Size()) for this field as well.

+  0,                                     // Manufacturer
+                                         // (Unused Use ModuleManufactuerId)
+  3,                                     // SerialNumber
+  4,                                     // AssetTag
+  0,                                     // PartNumber
+                                         // (Unused Use ModuleProductId)
+  0,                                     // Attributes
+  0,                                     // ExtendedSize
+  2000,                                  // ConfiguredMemoryClockSpeed

[SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?

+  0,                                     // MinimumVoltage
+  0,                                     // MaximumVoltage
+  0,                                     // ConfiguredVoltage
+  MemoryTechnologyDram,                  // MemoryTechnology

[SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?

+  {                                      // MemoryOperatingModeCapability
+    .Uint16 = 0x000
+  },

[SAMI] I think the above initialisation may not be portable.

+  5,                                    // FirmwareVersion
+  0,                                    // ModuleManufacturerId
+  0,                                    // ModuleProductId
+  0,                                    // MemorySubsystemContollerManufacturerId
+  0,                                    // MemorySybsystemControllerProductId
+  0,                                    // NonVolatileSize
+  0,                                    // VolatileSize
+  0,                                    // CacheSize
+  0,                                    // LogicalSize
+  0,                                    // ExtendedSpeed
+  0,                                    // ExtendedConfiguredMemorySpeed
+};
+
+STATIC CHAR8  UnknownStr[] = "Unknown\0";

[SAMI] Would it be possible to add the CONST qualifier, please?

+
+STATIC
+EFI_STATUS
+EFIAPI
+FreeSmbiosType17TableEx (
+  IN      CONST SMBIOS_TABLE_GENERATOR                   *CONST    This,
+  IN      CONST CM_STD_OBJ_SMBIOS_TABLE_INFO             *CONST SmbiosTableInfo,
+  IN      CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL     *CONST CfgMgrProtocol,
+  IN OUT        SMBIOS_STRUCTURE                         ***CONST Table,
+  IN      CONST UINTN TableCount
+  )
+{
+  return EFI_SUCCESS;
+}
+
+/** Construct SMBIOS Type17 Table describing memory devices.
+
+  If this function allocates any resources then they must be freed
+  in the FreeXXXXTableResources function.
+
+  @param [in]  This            Pointer to the SMBIOS table generator.
+  @param [in]  SmbiosTableInfo Pointer to the SMBIOS table information.
+  @param [in]  CfgMgrProtocol  Pointer to the Configuration Manager
+                               Protocol interface.
+  @param [out] Table           Pointer to the SMBIOS table.
+
+  @retval EFI_SUCCESS            Table generated successfully.
+  @retval EFI_BAD_BUFFER_SIZE    The size returned by the Configuration
+                                 Manager is less than the Object size for
+                                 the requested object.
+  @retval EFI_INVALID_PARAMETER  A parameter is invalid.
+  @retval EFI_NOT_FOUND          Could not find information.
+  @retval EFI_OUT_OF_RESOURCES   Could not allocate memory.
+  @retval EFI_UNSUPPORTED        Unsupported configuration.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+BuildSmbiosType17TableEx (
+  IN  CONST SMBIOS_TABLE_GENERATOR                         *This,
+  IN        CM_STD_OBJ_SMBIOS_TABLE_INFO           *CONST SmbiosTableInfo,
+  IN  CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL   *CONST CfgMgrProtocol,
+  OUT       SMBIOS_STRUCTURE                               ***Table,
+  OUT       UINTN                                  *CONST  TableCount
+  )
+{
+  EFI_STATUS                 Status;
+  UINT32                     NumMemDevices;
+  SMBIOS_STRUCTURE           **TableList;
+  CM_ARM_MEMORY_DEVICE_INFO  *MemoryDevicesInfo;
+  UINTN                      Index;
+  UINTN                      SerialNumLen;
+  CHAR8                      *SerialNum;
+  UINTN                      AssetTagLen;
+  CHAR8                      *AssetTag;
+  UINTN                      DeviceLocatorLen;
+  CHAR8                      *DeviceLocator;
+  UINTN                      BankLocatorLen;
+  CHAR8                      *BankLocator;
+  UINTN                      FirmwareVersionLen;
+  CHAR8                      *FirmwareVersion;
+  CHAR8                      *OptionalStrings;
+  SMBIOS_TABLE_TYPE17        *SmbiosRecord;
+
+  ASSERT (This != NULL);
+  ASSERT (SmbiosTableInfo != NULL);
+  ASSERT (CfgMgrProtocol != NULL);
+  ASSERT (Table != NULL);
+  ASSERT (TableCount != NULL);
+  ASSERT (SmbiosTableInfo->TableGeneratorId == This->GeneratorID);
+
+  DEBUG ((DEBUG_ERROR, "%a : Start \n", __FUNCTION__));
+  *Table = NULL;
+  Status = GetEArmObjMemoryDeviceInfo (
+             CfgMgrProtocol,
+             CM_NULL_TOKEN,
+             &MemoryDevicesInfo,
+             &NumMemDevices
+             );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((
+      DEBUG_ERROR,
+      "Failed to get Memory Devices CM Object %r\n",
+      Status
+      ));
+    return Status;
+  }
+
+  TableList = (SMBIOS_STRUCTURE **)AllocateZeroPool (sizeof (SMBIOS_STRUCTURE *) * NumMemDevices);

[SAMI] The memory allocated here should be freed in
FreeSmbiosType17TableEx.

+  if (TableList == NULL) {
+    DEBUG ((DEBUG_ERROR, "Failed to alloc memory for %u devices table\n"));
+    Status = EFI_OUT_OF_RESOURCES;
+    goto exit;
+  }
+
+  for (Index = 0; Index < NumMemDevices; Index++) {
+    if (MemoryDevicesInfo[Index].SerialNum != NULL) {
+      SerialNumLen = AsciiStrLen (MemoryDevicesInfo[Index].SerialNum);
+      SerialNum    = MemoryDevicesInfo[Index].SerialNum;
+    } else {
+      SerialNumLen = AsciiStrLen (UnknownStr);
+      SerialNum    = UnknownStr;

[SAMI] If the serial number is not provided, then should the string
field be set to 0?
See Section 6.1.3, SMBIOS Spec Version 3.6.0 which states
"If a string field references no string, a null (0) is placed in that
string field."
[/SAMI]

+    }
+
+    if (MemoryDevicesInfo[Index].AssetTag != NULL) {
+      AssetTagLen = AsciiStrLen (MemoryDevicesInfo[Index].AssetTag);
+      AssetTag    = MemoryDevicesInfo[Index].AssetTag;
+    } else {
+      AssetTagLen = AsciiStrLen (UnknownStr);
+      AssetTag    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].DeviceLocator != NULL) {
+      DeviceLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].DeviceLocator);
+      DeviceLocator    = MemoryDevicesInfo[Index].DeviceLocator;
+    } else {
+      DeviceLocatorLen = AsciiStrLen (UnknownStr);
+      DeviceLocator    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].BankLocator != NULL) {
+      BankLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].BankLocator);
+      BankLocator    = MemoryDevicesInfo[Index].BankLocator;
+    } else {
+      BankLocatorLen = AsciiStrLen (UnknownStr);
+      BankLocator    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].FirmwareVersion != NULL) {
+      FirmwareVersionLen = AsciiStrLen (MemoryDevicesInfo[Index].FirmwareVersion);
+      FirmwareVersion    = MemoryDevicesInfo[Index].FirmwareVersion;
+    } else {
+      FirmwareVersionLen = AsciiStrLen (UnknownStr);
+      FirmwareVersion    = UnknownStr;
+    }
+
+    SmbiosRecord = (SMBIOS_TABLE_TYPE17 *)AllocateZeroPool (
+                                            sizeof (SMBIOS_TABLE_TYPE17) +
+                                            SerialNumLen + 1 +
+                                            AssetTagLen + 1 + DeviceLocatorLen + 1 +
+                                            BankLocatorLen + 1 + FirmwareVersionLen + 1 + 1
+                                            );

[SAMI] The memory allocated here needs to be freed in
FreeSmbiosType17TableEx as  SmbiosProtocol->Add () makes a copy of the
SmbiosTable, see
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FMdeModulePkg%2FUniversal%2FSmbiosDxe%2FSmbiosDxe.c%23L476&;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=EnTxn07ekjA7bGUeCg2c0BaUMVW0yU5JFjXNOcZuhQA%3D&amp;reserved=0
and
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FMdeModulePkg%2FUniversal%2FSmbiosDxe%2FSmbiosDxe.c%23L516&;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=d6kU6CdywK4fnOdxE8CyTTM9eQHDE38FzZB7SA2FTqc%3D&amp;reserved=0.

+    if (SmbiosRecord == NULL) {
+      Status = EFI_OUT_OF_RESOURCES;
+      goto exit;
+    }
+
+    CopyMem (SmbiosRecord, &MemDeviceInfoTemplate, sizeof (SMBIOS_TABLE_TYPE17));
+    SmbiosRecord->ExtendedSize         = MemoryDevicesInfo[Index].Size;

[SAMI] CM_ARM_MEMORY_DEVICE_INFO.Size is documented as size in bytes,
while looking at the SMBIOS specification, section 7.18.5 for the
Extended Size Bits 30:0 represent the size of the memory device in
megabytes.
I think it will be useful to create UpdateSmbiosTable17Size() which does
the appropriate encoding and updation of the SMBIOS table fieds.
[/SAMI]

+    SmbiosRecord->DeviceSet            = MemoryDevicesInfo[Index].DeviceSet;
+    SmbiosRecord->ModuleManufacturerID =
+      MemoryDevicesInfo[Index].ModuleManufacturerId;
+    SmbiosRecord->ModuleProductID =
+      MemoryDevicesInfo[Index].ModuleProductId;
+    SmbiosRecord->Attributes =
+      MemoryDevicesInfo[Index].Attributes;
+    SmbiosRecord->ExtendedSpeed = MemoryDevicesInfo[Index].Speed;
+    OptionalStrings             = (CHAR8 *)(SmbiosRecord + 1);
+    AsciiSPrint (OptionalStrings, DeviceLocatorLen + 1, DeviceLocator);

[SAMI] I think we can simplify the publishing of the SMBIOS strings
using SmbiosStringTableLib. Please see the patch at
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fedk2.groups.io%2Fg%2Fdevel%2Fmessage%2F93651&;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=4xHMP2KfNlcdeBrtH%2FIT1F249uWIoz0XZreF3FSugq8%3D&amp;reserved=0

+    OptionalStrings = OptionalStrings + DeviceLocatorLen + 1;
+    AsciiSPrint (OptionalStrings, BankLocatorLen + 1, BankLocator);
+    OptionalStrings = OptionalStrings + BankLocatorLen + 1;
+    AsciiSPrint (OptionalStrings, SerialNumLen + 1, SerialNum);
+    OptionalStrings = OptionalStrings + SerialNumLen + 1;
+    AsciiSPrint (OptionalStrings, AssetTagLen + 1, AssetTag);
+    OptionalStrings = OptionalStrings + AssetTagLen + 1;
+    AsciiSPrint (OptionalStrings, FirmwareVersionLen + 1, FirmwareVersion);
+    OptionalStrings  = OptionalStrings + FirmwareVersionLen + 1;
+    TableList[Index] = (SMBIOS_STRUCTURE *)SmbiosRecord;
+  }
+
+  *Table      = TableList;
+  *TableCount = NumMemDevices;
+
+exit:
+  DEBUG ((DEBUG_ERROR, "%a : Done \n", __FUNCTION__));
+  return Status;
+}
+
+/** The interface for the SMBIOS Type17 Table Generator.
+*/
+STATIC
+CONST
+SMBIOS_TABLE_GENERATOR  SmbiosType17Generator = {
+  // Generator ID
+  CREATE_STD_SMBIOS_TABLE_GEN_ID (EStdSmbiosTableIdType17),
+  // Generator Description
+  L"SMBIOS.TYPE17.GENERATOR",
+  // SMBIOS Table Type
+  EFI_SMBIOS_TYPE_MEMORY_DEVICE,
+  NULL,
+  NULL,
+  // Build table function Extended.
+  BuildSmbiosType17TableEx,
+  // Free function Extended.
+  FreeSmbiosType17TableEx
+};
+
+/** Register the Generator with the SMBIOS Table Factory.
+
+  @param [in]  ImageHandle  The handle to the image.
+  @param [in]  SystemTable  Pointer to the System Table.
+
+  @retval EFI_SUCCESS           The Generator is registered.
+  @retval EFI_INVALID_PARAMETER A parameter is invalid.
+  @retval EFI_ALREADY_STARTED   The Generator for the Table ID
+                                is already registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibConstructor (
+  IN  EFI_HANDLE        ImageHandle,
+  IN  EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = RegisterSmbiosTableGenerator (&SmbiosType17Generator);
+  DEBUG ((
+    DEBUG_INFO,
+    "SMBIOS Type 17: Register Generator. Status = %r\n",
+    Status
+    ));
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}
+
+/** Deregister the Generator from the SMBIOS Table Factory.
+
+  @param [in]  ImageHandle  The handle to the image.
+  @param [in]  SystemTable  Pointer to the System Table.
+
+  @retval EFI_SUCCESS           The Generator is deregistered.
+  @retval EFI_INVALID_PARAMETER A parameter is invalid.
+  @retval EFI_NOT_FOUND         The Generator is not registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibDestructor (
+  IN  EFI_HANDLE        ImageHandle,
+  IN  EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = DeregisterSmbiosTableGenerator (&SmbiosType17Generator);
+  DEBUG ((
+    DEBUG_INFO,
+    "SMBIOS Type17: Deregister Generator. Status = %r\n",
+    Status
+    ));
+  ASSERT_EFI_ERROR (Status);
+  return Status;
+}
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
new file mode 100644
index 0000000000..78a80b75f0
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
@@ -0,0 +1,32 @@
+## @file
+# SMBIOS Type17 Table Generator
+#
+#  Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#  Copyright (c) 2019 - 2021, Arm Limited. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+  INF_VERSION    = 0x0001001B
+  BASE_NAME      = SmbiosType17LibArm
+  FILE_GUID      = 1f063bac-f8f1-4e08-8ffd-9aae52c75497
+  VERSION_STRING = 1.0
+  MODULE_TYPE    = DXE_DRIVER
+  LIBRARY_CLASS  = NULL|DXE_DRIVER
+  CONSTRUCTOR    = SmbiosType17LibConstructor
+  DESTRUCTOR     = SmbiosType17LibDestructor
+
+[Sources]
+  SmbiosType17Generator.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  EmbeddedPkg/EmbeddedPkg.dec
+  ArmPlatformPkg/ArmPlatformPkg.dec
+  DynamicTablesPkg/DynamicTablesPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib

Hi Girish,

Please find my response inline marked [SAMI].

Regards,

Sami Mujawar

Hello Sami

Thank you so much for your review, I apologize for the late response.

My comment in line about the handle manager [GM].

Best Regards
Girish

On 9/12/2022 8:57 AM, Sami Mujawar wrote:

External email: Use caution opening links or attachments


Hi Girish,

Thank you for this patch and for the effort for bringing forward dynamic
SMBIOS generation.

Please find my feedback inline marked [SAMI].

Regards,

Sami Mujawar

On 26/08/2022 06:37 pm, Girish Mahadevan wrote:

Add a new CM object to describe memory devices and setup a new
Generator Library for SMBIOS Type17 table.

Signed-off-by: Girish Mahadevan<gmahadevan@...>
---
  .../Include/ArmNameSpaceObjects.h             |  59 +++
  .../SmbiosType17Lib/SmbiosType17Generator.c   | 338 ++++++++++++++++++
  .../SmbiosType17Lib/SmbiosType17LibArm.inf    |  32 ++
  3 files changed, 429 insertions(+)
  create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
  create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf

diff --git a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
index 102e0f96be..199a19e997 100644
--- a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
+++ b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
@@ -63,6 +63,7 @@ typedef enum ArmObjectID {
    EArmObjPciInterruptMapInfo,          ///< 39 - Pci Interrupt Map Info
    EArmObjRmr,                          ///< 40 - Reserved Memory Range Node
    EArmObjMemoryRangeDescriptor,        ///< 41 - Memory Range Descriptor
+  EArmObjMemoryDeviceInfo,             ///< 42 - Memory Device Information
    EArmObjMax
  } EARM_OBJECT_ID;

@@ -1070,6 +1071,64 @@ typedef struct CmArmRmrDescriptor {
    UINT64    Length;
  } CM_ARM_MEMORY_RANGE_DESCRIPTOR;

+/** A structure that describes the physical memory device.
+
+  The physical memory devices on the system are described by this object.
+
+  SMBIOS Specification v3.5.0 Type17
+
+  ID: EArmObjMemoryDeviceInfo,
+*/
+typedef struct CmArmMemoryDeviceInfo {

[SAMI] I think we may need a Token pointing to the Type 16 object so
that the Physical Memory Array Handle can be setup, see my comment below
about the HandleManager.

+  /** Size of the device.
+    Size of the device in bytes.
+  */
+  UINT64  Size;
+
+  /** Device Set */
+  UINT8   DeviceSet;
+
+  /** Speed of the device
+    Speed of the device in MegaTransfers/second.
+  */
+  UINT32  Speed;
+
+  /** Serial Number of device  */
+  CHAR8   *SerialNum;
+
+  /** AssetTag identifying the device */
+  CHAR8   *AssetTag;
+
+  /** Device Locator String for the device.
+   String that describes the slot or position of the device on the board.
+   */
+  CHAR8   *DeviceLocator;
+
+  /** Bank locator string for the device.
+   String that describes the bank where the device is located.
+   */
+  CHAR8   *BankLocator;
+
+  /** Firmware version of the memory device */
+  CHAR8   *FirmwareVersion;
+
+  /** Manufacturer Id.
+   2 byte Manufacturer Id as per JEDEC Standard JEP106AV
+  */
+  UINT16  ModuleManufacturerId;
+
+  /** Manufacturer Product Id
+   2 byte Manufacturer Id as designated by Manufacturer.
+  */
+  UINT16  ModuleProductId;
+
+  /** Device Attributes */
+  UINT8   Attributes;
+
+  /** Device Configured Voltage in millivolts */
+  UINT16  ConfiguredVoltage;

[SAMI] This field does not appear to be used in the generator. If the
intention is to use this in the future, then it may be better to add
this at a later stage.

+} CM_ARM_MEMORY_DEVICE_INFO;
+
  #pragma pack()

  #endif // ARM_NAMESPACE_OBJECTS_H_
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
new file mode 100644
index 0000000000..5683ca570f
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
@@ -0,0 +1,338 @@
+/** @file
+  SMBIOS Type17 Table Generator.
+
+  Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+  Copyright (c) 2020 - 2021, Arm Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PrintLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/SmbiosType17FixupLib.h>

[SAMI] I could not find SmbiosType17FixupLib.h in this patch series. Can
you check, please?

+
+// Module specific include files.
+#include <ConfigurationManagerObject.h>
+#include <ConfigurationManagerHelper.h>
+#include <Protocol/ConfigurationManagerProtocol.h>
+#include <Protocol/Smbios.h>

[SAMI] I think Protocol/Smbios.h may not be required in this file. Can
you check, please?

+#include <IndustryStandard/SmBios.h>
+
+/** This macro expands to a function that retrieves the Memory Device
+    information from the Configuration Manager.
+*/
+GET_OBJECT_LIST (
+  EObjNameSpaceArm,
+  EArmObjMemoryDeviceInfo,
+  CM_ARM_MEMORY_DEVICE_INFO
+  )
+
+// Default Values for Memory Device
+STATIC SMBIOS_TABLE_TYPE17 MemDeviceInfoTemplate = {
+  {                                      // Hdr
+    EFI_SMBIOS_TYPE_MEMORY_DEVICE,       // Type
+    sizeof (SMBIOS_TABLE_TYPE17),        // Length
+    0                                    // Handle
+  },
+  0,                                     // MemoryArrayHandle

[SAMI] Do you have any thoughts on how the MemoryArrayHandle can be setup?

The same applies for the following MemoryErrorInformationHandle field.

I think we need some sort of a HandleManager in DynamicTablesFramework
that can keep track of the mappings between SMBIOS Objects and Table
Handles.

e.g. Smbios - HandleManager

+-------------------------------+-------------------------------+

       |    Object Token               | Table Handle                  |

+-------------------------------+-------------------------------+

       | Type16Obj_token         | Type 16 Table handle    |

+-------------------------------+-------------------------------+

       ...

- The Type17Object i.e. CM_ARM_MEMORY_DEVICE_INFO can then hold a token
for the Type16Object.

  - If Type 17 table is to be installed, DynamicTablemanager shall
search the SMBIOS table list to see if a Type16 table is requested to be
installed.

- If a Type16 table is present in the list of SMBIOS table to install,
the Type16 table shall be installed first and an entry is made in the
Smbios HandleManager to create a mapping of Type16Obj_token  <==> Type16
Table Handle.

- The Type17 table can now be built and if a the Type16Object token is
provided in CM_ARM_MEMORY_DEVICE_INFO, the Smbios HandleManager shall be
searched (using Type16Obj_token) to retrieve the Type16 Table handle and
populate the Type 17 Physical Memory Array Handle field.

I think we may have to experiment a bit before we arrive at the correct
design. However, please do let me know your thoughts on the above.

[GM] I agree with the idea of having a map of CM_OBJECT_TOKENs to SMBIOS handles. I've added this to the DynamicTableFactoryProtocol.

However when it comes to actually figuring out and adding the reference SMBIOS handle We've come up with a slightly different approach.

If I understood what you were saying above is:
 If we happen to parse a Type17 table
   if that Type17 table has a token to a Physical memory array CM_OBJ
     if there is an existing Smbios Handle (look up this handle using
                                             the CM_OBJECT_TOKEN)
         then use this handle.
     else if there is a generator for Type16 registered
         call the Type16 generator code first

IMO this gets a bit difficult to manage. Right now the DynamicTableManagerDxe walks the array of EStdObjSmbiosTableList CM objects, finds the generator for each Table, invokes it, gets an SMBIOS record that it then installs via the SmbiosDxe driver.
It seemed a bit convoluted to call the generator and install an SMBIOS table while within the generator of another Smbios table.
And if there are layers of dependencies (or multiple dependencies) it could add to the complexities.

Instead what we came up with is:

If we happen to parse a Type17 table
  if that Type17 table has a token to a Physical memory array CM_OBJ
     if there is an existing Smbios Handle (look up this handle using
                                             the CM_OBJECT_TOKEN )
         then use this handle.
     else if there is a generator for Type16 Registered
           Generate an SMBIOS handle [since SmbiosDxe maintains the
                                      handle DB privately I had to
                                      pick a handle and check if it
                                      clashes with existing records]
           Add this SMBIOS handle to the map.
     else // No generator present
          Proceed without adding any reference


Before Adding any SMBIOS table, we check if there is an existing SMBIOS handle for the CM_OBJECT_TOKEN (the generator will return a CM_OBJECT_TOKEN for each SMBIOS record created).
If there is an existing SMBIOS handle, pass that in, else pass in SMBIOS_HANDLE_PI_RESERVED and let SmbiosDxe assign the handle.

Here is a sample implementation of this approach (it is a WIP, but I wanted to get your thoughts on it)

https://github.com/tianocore/edk2/compare/master...gmahadevan:edk2-upstream:RFC/smbios-dyntables

[SAMI] I had a look at the above branch and have the following suggestions:

a. To resolve the dependency order, please see my patches for SMBIOS table dispatcher at: https://edk2.groups.io/g/devel/message/95340

You should be able to apply these patches on your 'edk2-upstream:RFC/smbios-dyntables' branch and enable the dispatcher in ProcessSmbiosTables().

e.g. In file DynamicTablesPkg/Drivers/DynamicTableManagerDxe/DynamicTableManagerDxe.c, the SMBIOS table dispatcher can be invoked once it is initialised as shown below.

@@ -1007,19 +1007,24 @@ ProcessSmbiosTables (
     SmbiosTableCount
     ));

+  // Initialise the SMBIOS Table Dispatcher state machine.
+  InitSmbiosTableDispatcher (SmbiosTableInfo, SmbiosTableCount);
+
   for (Idx = 0; Idx < SmbiosTableCount; Idx++) {
-    Status = BuildAndInstallSmbiosTable (
+    Status = DispatchSmbiosTable (
+               SmbiosTableInfo[Idx].TableType,
                TableFactoryProtocol,
                CfgMgrProtocol,
                SmbiosProtocol,
-               &SmbiosTableInfo[Idx]
+               SmbiosTableInfo,
+               SmbiosTableCount
                );
     if (EFI_ERROR (Status)) {
       DEBUG ((
         DEBUG_ERROR,
-        "ERROR: Failed to install SMBIOS Table." \
-        " Id = %u Status = %r\n",
-        SmbiosTableInfo[Idx].TableGeneratorId,
+        "ERROR: Failed to dispatch SMBIOS Table for installation." \
+        " Table Type = %u Status = %r\n",
+        SmbiosTableInfo[Idx].TableType,
         Status
         ));
     }

b. With the SMBIOS dispatcher patch and the handle manager, it should be possible to update the handles for dependent tables. This should remove the need for the handle generation and management.

c. With regards to the SMBIOS handle manager, I think it would be better to add CM_OBJECT_ID for the SmbiosCmToken in SMBIOS_HANDLE_MAP.

d. A new SMBIOS object namespace should be defined.

    e.g Namespace ID 1010b or 1100b - SMBIOS Objects, see https://github.com/tianocore/edk2/blob/master/DynamicTablesPkg/Include/ConfigurationManagerObject.h#L30-L34

   With this change, CM_ARM_MEMORY_DEVICE_INFO becomes CM_SMBIOS_MEMORY_DEVICE_INFO

    Similarly, EArmObjMemoryDeviceInfo becomes ESmbiosObjMemoryDeviceInfo

e. With regards to DynamicTableManager.c, I think we should split the ACPI & SMBIOS processing in individual files (e.g. AcpiBuilder.c & SmbiosBuilder.c) under DynamicTableManagerDxe.

f. Status appears to be returned uninitialised in DynamicTableManagerDxeInitialize().

g. DynamicTablesPkg\Library\Smbios\Arm\SmbiosType17Lib can be moved to DynamicTablesPkg\Library\Smbios\SmbiosType17Lib.

I prefer a github branch with the patch as it is very helpful to view the code being reviewed. However, it is difficult to provide feedback. Is it possible to submit a patch for the changes with the link for the guthub branch in the future, please?

I am not sure if we need an edk2-staging branch for this feature. But if you think it would be helpful then please let me know and I will send out a request to create a new feature branch.

[/SAMI]

Sorry for the long message, please let me know your thoughts.

[/GM]

[SAMI]

+  0,                                     // MemoryErrorInformationHandle
+  0xFFFF,                                // TotalWidth
+  0xFFFF,                                // DataWIdth

[SAMI] I need to find out how these fields should be populated, but the
Annex A, SMBIOS specification version 3.6.0 says the following:

4.8.4 Total Width is not 0FFFFh (Unknown) if the memory device is
installed. (Size is not 0.)

4.8.5 Data Width is not 0FFFFh (Unknown).

Can you explain how this field is used, please?

[/SAMI]

+  0x7FFF,                                // Size (always use Extended Size)

[SAMI] I think this field should be set based on the Size.

The spec says "If the size is 32 GB-1 MB or greater, the field value is
7FFFh and the actual size is stored in the Extended Size field."

I think it would be good to have a static function  that encodes the
size in wither the Size field or the Extended Size field.

e.g. UpdateSmbiosTable17Size (SMBIOS_TABLE_TYPE17 *SmbiosRecord, UINTN
Size) {

          if (Size > 32GB-1MB) {

             SmbiosRecord->Size = EncodeSize (xxx);

           } else {

              SmbiosRecord->ExtendedSize = EncodeExtendedSize (xxx);

          }

     }

[/SAMI]

+  MemoryTypeUnknown,                     // FormFactor
+  0xFF,                                  // DeviceSet
+  1,                                     // Device Locator
+  2,                                     // Bank Locator
+  MemoryTypeSdram,                       // MemoryType
+  {                                      // TypeDetail
+    0
+  },
+  0xFFFF,                                // Speed (Use Extended Speed)

[SAMI] Maybe we need a helper function (similar to
UpdateSmbiosTable17Size()) for this field as well.

+  0,                                     // Manufacturer
+                                         // (Unused Use ModuleManufactuerId)
+  3,                                     // SerialNumber
+  4,                                     // AssetTag
+  0,                                     // PartNumber
+                                         // (Unused Use ModuleProductId)
+  0,                                     // Attributes
+  0,                                     // ExtendedSize
+  2000,                                  // ConfiguredMemoryClockSpeed

[SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?

+  0,                                     // MinimumVoltage
+  0,                                     // MaximumVoltage
+  0,                                     // ConfiguredVoltage
+  MemoryTechnologyDram,                  // MemoryTechnology

[SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?

+  {                                      // MemoryOperatingModeCapability
+    .Uint16 = 0x000
+  },

[SAMI] I think the above initialisation may not be portable.

+  5,                                    // FirmwareVersion
+  0,                                    // ModuleManufacturerId
+  0,                                    // ModuleProductId
+  0,                                    // MemorySubsystemContollerManufacturerId
+  0,                                    // MemorySybsystemControllerProductId
+  0,                                    // NonVolatileSize
+  0,                                    // VolatileSize
+  0,                                    // CacheSize
+  0,                                    // LogicalSize
+  0,                                    // ExtendedSpeed
+  0,                                    // ExtendedConfiguredMemorySpeed
+};
+
+STATIC CHAR8  UnknownStr[] = "Unknown\0";

[SAMI] Would it be possible to add the CONST qualifier, please?

+
+STATIC
+EFI_STATUS
+EFIAPI
+FreeSmbiosType17TableEx (
+  IN      CONST SMBIOS_TABLE_GENERATOR                   *CONST    This,
+  IN      CONST CM_STD_OBJ_SMBIOS_TABLE_INFO             *CONST    SmbiosTableInfo,
+  IN      CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL     *CONST    CfgMgrProtocol,
+  IN OUT        SMBIOS_STRUCTURE                         ***CONST  Table,
+  IN      CONST UINTN                                              TableCount
+  )
+{
+  return EFI_SUCCESS;
+}
+
+/** Construct SMBIOS Type17 Table describing memory devices.
+
+  If this function allocates any resources then they must be freed
+  in the FreeXXXXTableResources function.
+
+  @param [in]  This            Pointer to the SMBIOS table generator.
+  @param [in]  SmbiosTableInfo Pointer to the SMBIOS table information.
+  @param [in]  CfgMgrProtocol  Pointer to the Configuration Manager
+                               Protocol interface.
+  @param [out] Table           Pointer to the SMBIOS table.
+
+  @retval EFI_SUCCESS            Table generated successfully.
+  @retval EFI_BAD_BUFFER_SIZE    The size returned by the Configuration
+                                 Manager is less than the Object size for
+                                 the requested object.
+  @retval EFI_INVALID_PARAMETER  A parameter is invalid.
+  @retval EFI_NOT_FOUND          Could not find information.
+  @retval EFI_OUT_OF_RESOURCES   Could not allocate memory.
+  @retval EFI_UNSUPPORTED        Unsupported configuration.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+BuildSmbiosType17TableEx (
+  IN  CONST SMBIOS_TABLE_GENERATOR                         *This,
+  IN        CM_STD_OBJ_SMBIOS_TABLE_INFO           *CONST  SmbiosTableInfo,
+  IN  CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL   *CONST  CfgMgrProtocol,
+  OUT       SMBIOS_STRUCTURE                               ***Table,
+  OUT       UINTN                                  *CONST  TableCount
+  )
+{
+  EFI_STATUS                 Status;
+  UINT32                     NumMemDevices;
+  SMBIOS_STRUCTURE           **TableList;
+  CM_ARM_MEMORY_DEVICE_INFO  *MemoryDevicesInfo;
+  UINTN                      Index;
+  UINTN                      SerialNumLen;
+  CHAR8                      *SerialNum;
+  UINTN                      AssetTagLen;
+  CHAR8                      *AssetTag;
+  UINTN                      DeviceLocatorLen;
+  CHAR8                      *DeviceLocator;
+  UINTN                      BankLocatorLen;
+  CHAR8                      *BankLocator;
+  UINTN                      FirmwareVersionLen;
+  CHAR8                      *FirmwareVersion;
+  CHAR8                      *OptionalStrings;
+  SMBIOS_TABLE_TYPE17        *SmbiosRecord;
+
+  ASSERT (This != NULL);
+  ASSERT (SmbiosTableInfo != NULL);
+  ASSERT (CfgMgrProtocol != NULL);
+  ASSERT (Table != NULL);
+  ASSERT (TableCount != NULL);
+  ASSERT (SmbiosTableInfo->TableGeneratorId == This->GeneratorID);
+
+  DEBUG ((DEBUG_ERROR, "%a : Start \n", __FUNCTION__));
+  *Table = NULL;
+  Status = GetEArmObjMemoryDeviceInfo (
+             CfgMgrProtocol,
+             CM_NULL_TOKEN,
+             &MemoryDevicesInfo,
+             &NumMemDevices
+             );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((
+      DEBUG_ERROR,
+      "Failed to get Memory Devices CM Object %r\n",
+      Status
+      ));
+    return Status;
+  }
+
+  TableList = (SMBIOS_STRUCTURE **)AllocateZeroPool (sizeof (SMBIOS_STRUCTURE *) * NumMemDevices);

[SAMI] The memory allocated here should be freed in
FreeSmbiosType17TableEx.

+  if (TableList == NULL) {
+    DEBUG ((DEBUG_ERROR, "Failed to alloc memory for %u devices table\n"));
+    Status = EFI_OUT_OF_RESOURCES;
+    goto exit;
+  }
+
+  for (Index = 0; Index < NumMemDevices; Index++) {
+    if (MemoryDevicesInfo[Index].SerialNum != NULL) {
+      SerialNumLen = AsciiStrLen (MemoryDevicesInfo[Index].SerialNum);
+      SerialNum    = MemoryDevicesInfo[Index].SerialNum;
+    } else {
+      SerialNumLen = AsciiStrLen (UnknownStr);
+      SerialNum    = UnknownStr;

[SAMI] If the serial number is not provided, then should the string
field be set to 0?

See Section 6.1.3, SMBIOS Spec Version 3.6.0 which states

"If a string field references no string, a null (0) is placed in that
string field."

[/SAMI]

+    }
+
+    if (MemoryDevicesInfo[Index].AssetTag != NULL) {
+      AssetTagLen = AsciiStrLen (MemoryDevicesInfo[Index].AssetTag);
+      AssetTag    = MemoryDevicesInfo[Index].AssetTag;
+    } else {
+      AssetTagLen = AsciiStrLen (UnknownStr);
+      AssetTag    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].DeviceLocator != NULL) {
+      DeviceLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].DeviceLocator);
+      DeviceLocator    = MemoryDevicesInfo[Index].DeviceLocator;
+    } else {
+      DeviceLocatorLen = AsciiStrLen (UnknownStr);
+      DeviceLocator    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].BankLocator != NULL) {
+      BankLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].BankLocator);
+      BankLocator    = MemoryDevicesInfo[Index].BankLocator;
+    } else {
+      BankLocatorLen = AsciiStrLen (UnknownStr);
+      BankLocator    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].FirmwareVersion != NULL) {
+      FirmwareVersionLen = AsciiStrLen (MemoryDevicesInfo[Index].FirmwareVersion);
+      FirmwareVersion    = MemoryDevicesInfo[Index].FirmwareVersion;
+    } else {
+      FirmwareVersionLen = AsciiStrLen (UnknownStr);
+      FirmwareVersion    = UnknownStr;
+    }
+
+    SmbiosRecord = (SMBIOS_TABLE_TYPE17 *)AllocateZeroPool (
+                                            sizeof (SMBIOS_TABLE_TYPE17) +
+                                            SerialNumLen + 1 +
+                                            AssetTagLen + 1 + DeviceLocatorLen + 1 +
+                                            BankLocatorLen + 1 + FirmwareVersionLen + 1 + 1
+                                            );

[SAMI] The memory allocated here needs to be freed in
FreeSmbiosType17TableEx as  SmbiosProtocol->Add () makes a copy of the
SmbiosTable, see
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FMdeModulePkg%2FUniversal%2FSmbiosDxe%2FSmbiosDxe.c%23L476&amp;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=EnTxn07ekjA7bGUeCg2c0BaUMVW0yU5JFjXNOcZuhQA%3D&amp;reserved=0
and
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FMdeModulePkg%2FUniversal%2FSmbiosDxe%2FSmbiosDxe.c%23L516&amp;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=d6kU6CdywK4fnOdxE8CyTTM9eQHDE38FzZB7SA2FTqc%3D&amp;reserved=0.

+    if (SmbiosRecord == NULL) {
+      Status = EFI_OUT_OF_RESOURCES;
+      goto exit;
+    }
+
+    CopyMem (SmbiosRecord, &MemDeviceInfoTemplate, sizeof (SMBIOS_TABLE_TYPE17));
+    SmbiosRecord->ExtendedSize         = MemoryDevicesInfo[Index].Size;

[SAMI] CM_ARM_MEMORY_DEVICE_INFO.Size is documented as size in bytes,
while looking at the SMBIOS specification, section 7.18.5 for the
Extended Size Bits 30:0 represent the size of the memory device in
megabytes.

I think it will be useful to create UpdateSmbiosTable17Size() which does
the appropriate encoding and updation of the SMBIOS table fieds.

[/SAMI]

+    SmbiosRecord->DeviceSet            = MemoryDevicesInfo[Index].DeviceSet;
+    SmbiosRecord->ModuleManufacturerID =
+      MemoryDevicesInfo[Index].ModuleManufacturerId;
+    SmbiosRecord->ModuleProductID =
+      MemoryDevicesInfo[Index].ModuleProductId;
+    SmbiosRecord->Attributes =
+      MemoryDevicesInfo[Index].Attributes;
+    SmbiosRecord->ExtendedSpeed = MemoryDevicesInfo[Index].Speed;
+    OptionalStrings             = (CHAR8 *)(SmbiosRecord + 1);
+    AsciiSPrint (OptionalStrings, DeviceLocatorLen + 1, DeviceLocator);

[SAMI] I think we can simplify the publishing of the SMBIOS strings
using SmbiosStringTableLib. Please see the patch at
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fedk2.groups.io%2Fg%2Fdevel%2Fmessage%2F93651&amp;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=4xHMP2KfNlcdeBrtH%2FIT1F249uWIoz0XZreF3FSugq8%3D&amp;reserved=0

+    OptionalStrings = OptionalStrings + DeviceLocatorLen + 1;
+    AsciiSPrint (OptionalStrings, BankLocatorLen + 1, BankLocator);
+    OptionalStrings = OptionalStrings + BankLocatorLen + 1;
+    AsciiSPrint (OptionalStrings, SerialNumLen + 1, SerialNum);
+    OptionalStrings = OptionalStrings + SerialNumLen + 1;
+    AsciiSPrint (OptionalStrings, AssetTagLen + 1, AssetTag);
+    OptionalStrings = OptionalStrings + AssetTagLen + 1;
+    AsciiSPrint (OptionalStrings, FirmwareVersionLen + 1, FirmwareVersion);
+    OptionalStrings  = OptionalStrings + FirmwareVersionLen + 1;
+    TableList[Index] = (SMBIOS_STRUCTURE *)SmbiosRecord;
+  }
+
+  *Table      = TableList;
+  *TableCount = NumMemDevices;
+
+exit:
+  DEBUG ((DEBUG_ERROR, "%a : Done \n", __FUNCTION__));
+  return Status;
+}
+
+/** The interface for the SMBIOS Type17 Table Generator.
+*/
+STATIC
+CONST
+SMBIOS_TABLE_GENERATOR  SmbiosType17Generator = {
+  // Generator ID
+  CREATE_STD_SMBIOS_TABLE_GEN_ID (EStdSmbiosTableIdType17),
+  // Generator Description
+  L"SMBIOS.TYPE17.GENERATOR",
+  // SMBIOS Table Type
+  EFI_SMBIOS_TYPE_MEMORY_DEVICE,
+  NULL,
+  NULL,
+  // Build table function Extended.
+  BuildSmbiosType17TableEx,
+  // Free function Extended.
+  FreeSmbiosType17TableEx
+};
+
+/** Register the Generator with the SMBIOS Table Factory.
+
+  @param [in]  ImageHandle  The handle to the image.
+  @param [in]  SystemTable  Pointer to the System Table.
+
+  @retval EFI_SUCCESS           The Generator is registered.
+  @retval EFI_INVALID_PARAMETER A parameter is invalid.
+  @retval EFI_ALREADY_STARTED   The Generator for the Table ID
+                                is already registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibConstructor (
+  IN  EFI_HANDLE        ImageHandle,
+  IN  EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = RegisterSmbiosTableGenerator (&SmbiosType17Generator);
+  DEBUG ((
+    DEBUG_INFO,
+    "SMBIOS Type 17: Register Generator. Status = %r\n",
+    Status
+    ));
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}
+
+/** Deregister the Generator from the SMBIOS Table Factory.
+
+  @param [in]  ImageHandle  The handle to the image.
+  @param [in]  SystemTable  Pointer to the System Table.
+
+  @retval EFI_SUCCESS           The Generator is deregistered.
+  @retval EFI_INVALID_PARAMETER A parameter is invalid.
+  @retval EFI_NOT_FOUND         The Generator is not registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibDestructor (
+  IN  EFI_HANDLE        ImageHandle,
+  IN  EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = DeregisterSmbiosTableGenerator (&SmbiosType17Generator);
+  DEBUG ((
+    DEBUG_INFO,
+    "SMBIOS Type17: Deregister Generator. Status = %r\n",
+    Status
+    ));
+  ASSERT_EFI_ERROR (Status);
+  return Status;
+}
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
new file mode 100644
index 0000000000..78a80b75f0
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
@@ -0,0 +1,32 @@
+## @file
+# SMBIOS Type17 Table Generator
+#
+#  Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#  Copyright (c) 2019 - 2021, Arm Limited. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+  INF_VERSION    = 0x0001001B
+  BASE_NAME      = SmbiosType17LibArm
+  FILE_GUID      = 1f063bac-f8f1-4e08-8ffd-9aae52c75497
+  VERSION_STRING = 1.0
+  MODULE_TYPE    = DXE_DRIVER
+  LIBRARY_CLASS  = NULL|DXE_DRIVER
+  CONSTRUCTOR    = SmbiosType17LibConstructor
+  DESTRUCTOR     = SmbiosType17LibDestructor
+
+[Sources]
+  SmbiosType17Generator.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  EmbeddedPkg/EmbeddedPkg.dec
+  ArmPlatformPkg/ArmPlatformPkg.dec
+  DynamicTablesPkg/DynamicTablesPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib

Hi Sami

Sorry for the long silence. I've sent you v2 of the patch (only framework not the Type17) which includes a link to a github branch.

Few more comments inline , prefixed by [GM].

Best Regards
Girish

On 10/18/2022 9:36 AM, Sami Mujawar via groups.io wrote:

*External email: Use caution opening links or attachments*
Hi Girish,
Please find my response inline marked [SAMI].
Regards,
Sami Mujawar
On 04/10/2022 11:43 pm, Girish Mahadevan via groups.io wrote:

Hello Sami

Thank you so much for your review, I apologize for the late response.

My comment in line about the handle manager [GM].

Best Regards
Girish

On 9/12/2022 8:57 AM, Sami Mujawar wrote:

External email: Use caution opening links or attachments


Hi Girish,

Thank you for this patch and for the effort for bringing forward dynamic
SMBIOS generation.

Please find my feedback inline marked [SAMI].

Regards,

Sami Mujawar

On 26/08/2022 06:37 pm, Girish Mahadevan wrote:

Add a new CM object to describe memory devices and setup a new
Generator Library for SMBIOS Type17 table.

Signed-off-by: Girish Mahadevan<gmahadevan@...>
---
  .../Include/ArmNameSpaceObjects.h             |  59 +++
  .../SmbiosType17Lib/SmbiosType17Generator.c   | 338 ++++++++++++++++++
  .../SmbiosType17Lib/SmbiosType17LibArm.inf    |  32 ++
  3 files changed, 429 insertions(+)
  create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
  create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf

diff --git a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
index 102e0f96be..199a19e997 100644
--- a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
+++ b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
@@ -63,6 +63,7 @@ typedef enum ArmObjectID {
    EArmObjPciInterruptMapInfo,          ///< 39 - Pci Interrupt Map Info
    EArmObjRmr,                          ///< 40 - Reserved Memory Range Node
    EArmObjMemoryRangeDescriptor,        ///< 41 - Memory Range Descriptor
+  EArmObjMemoryDeviceInfo,             ///< 42 - Memory Device Information
    EArmObjMax
  } EARM_OBJECT_ID;

@@ -1070,6 +1071,64 @@ typedef struct CmArmRmrDescriptor {
    UINT64    Length;
  } CM_ARM_MEMORY_RANGE_DESCRIPTOR;

+/** A structure that describes the physical memory device.
+
+  The physical memory devices on the system are described by this object.
+
+  SMBIOS Specification v3.5.0 Type17
+
+  ID: EArmObjMemoryDeviceInfo,
+*/
+typedef struct CmArmMemoryDeviceInfo {

[SAMI] I think we may need a Token pointing to the Type 16 object so
that the Physical Memory Array Handle can be setup, see my comment below
about the HandleManager.

+  /** Size of the device.
+    Size of the device in bytes.
+  */
+  UINT64  Size;
+
+  /** Device Set */
+  UINT8   DeviceSet;
+
+  /** Speed of the device
+    Speed of the device in MegaTransfers/second.
+  */
+  UINT32  Speed;
+
+  /** Serial Number of device  */
+  CHAR8   *SerialNum;
+
+  /** AssetTag identifying the device */
+  CHAR8   *AssetTag;
+
+  /** Device Locator String for the device.
+   String that describes the slot or position of the device on the board.
+   */
+  CHAR8   *DeviceLocator;
+
+  /** Bank locator string for the device.
+   String that describes the bank where the device is located.
+   */
+  CHAR8   *BankLocator;
+
+  /** Firmware version of the memory device */
+  CHAR8   *FirmwareVersion;
+
+  /** Manufacturer Id.
+   2 byte Manufacturer Id as per JEDEC Standard JEP106AV
+  */
+  UINT16  ModuleManufacturerId;
+
+  /** Manufacturer Product Id
+   2 byte Manufacturer Id as designated by Manufacturer.
+  */
+  UINT16  ModuleProductId;
+
+  /** Device Attributes */
+  UINT8   Attributes;
+
+  /** Device Configured Voltage in millivolts */
+  UINT16  ConfiguredVoltage;

[SAMI] This field does not appear to be used in the generator. If the
intention is to use this in the future, then it may be better to add
this at a later stage.

+} CM_ARM_MEMORY_DEVICE_INFO;
+
  #pragma pack()

  #endif // ARM_NAMESPACE_OBJECTS_H_
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
new file mode 100644
index 0000000000..5683ca570f
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
@@ -0,0 +1,338 @@
+/** @file
+  SMBIOS Type17 Table Generator.
+
+  Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+  Copyright (c) 2020 - 2021, Arm Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PrintLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/SmbiosType17FixupLib.h>

[SAMI] I could not find SmbiosType17FixupLib.h in this patch series. Can
you check, please?

+
+// Module specific include files.
+#include <ConfigurationManagerObject.h>
+#include <ConfigurationManagerHelper.h>
+#include <Protocol/ConfigurationManagerProtocol.h>
+#include <Protocol/Smbios.h>

[SAMI] I think Protocol/Smbios.h may not be required in this file. Can
you check, please?

+#include <IndustryStandard/SmBios.h>
+
+/** This macro expands to a function that retrieves the Memory Device
+    information from the Configuration Manager.
+*/
+GET_OBJECT_LIST (
+  EObjNameSpaceArm,
+  EArmObjMemoryDeviceInfo,
+  CM_ARM_MEMORY_DEVICE_INFO
+  )
+
+// Default Values for Memory Device
+STATIC SMBIOS_TABLE_TYPE17 MemDeviceInfoTemplate = {
+  {                                      // Hdr
+    EFI_SMBIOS_TYPE_MEMORY_DEVICE,       // Type
+    sizeof (SMBIOS_TABLE_TYPE17),        // Length
+    0                                    // Handle
+  },
+  0,                                     // MemoryArrayHandle

[SAMI] Do you have any thoughts on how the MemoryArrayHandle can be setup?

The same applies for the following MemoryErrorInformationHandle field.

I think we need some sort of a HandleManager in DynamicTablesFramework
that can keep track of the mappings between SMBIOS Objects and Table
Handles.

e.g. Smbios - HandleManager

+-------------------------------+-------------------------------+

       |    Object Token               | Table Handle                  |

+-------------------------------+-------------------------------+

       | Type16Obj_token         | Type 16 Table handle    |

+-------------------------------+-------------------------------+

       ...

- The Type17Object i.e. CM_ARM_MEMORY_DEVICE_INFO can then hold a token
for the Type16Object.

  - If Type 17 table is to be installed, DynamicTablemanager shall
search the SMBIOS table list to see if a Type16 table is requested to be
installed.

- If a Type16 table is present in the list of SMBIOS table to install,
the Type16 table shall be installed first and an entry is made in the
Smbios HandleManager to create a mapping of Type16Obj_token  <==> Type16
Table Handle.

- The Type17 table can now be built and if a the Type16Object token is
provided in CM_ARM_MEMORY_DEVICE_INFO, the Smbios HandleManager shall be
searched (using Type16Obj_token) to retrieve the Type16 Table handle and
populate the Type 17 Physical Memory Array Handle field.

I think we may have to experiment a bit before we arrive at the correct
design. However, please do let me know your thoughts on the above.

[GM] I agree with the idea of having a map of CM_OBJECT_TOKENs to SMBIOS handles. I've added this to the DynamicTableFactoryProtocol.

However when it comes to actually figuring out and adding the reference SMBIOS handle We've come up with a slightly different approach.

If I understood what you were saying above is:
 If we happen to parse a Type17 table
   if that Type17 table has a token to a Physical memory array CM_OBJ
     if there is an existing Smbios Handle (look up this handle using
                                             the CM_OBJECT_TOKEN)
         then use this handle.
     else if there is a generator for Type16 registered
         call the Type16 generator code first

IMO this gets a bit difficult to manage. Right now the DynamicTableManagerDxe walks the array of EStdObjSmbiosTableList CM objects, finds the generator for each Table, invokes it, gets an SMBIOS record that it then installs via the SmbiosDxe driver.
It seemed a bit convoluted to call the generator and install an SMBIOS table while within the generator of another Smbios table.
And if there are layers of dependencies (or multiple dependencies) it could add to the complexities.

Instead what we came up with is:

If we happen to parse a Type17 table
  if that Type17 table has a token to a Physical memory array CM_OBJ
     if there is an existing Smbios Handle (look up this handle using
                                             the CM_OBJECT_TOKEN )
         then use this handle.
     else if there is a generator for Type16 Registered
           Generate an SMBIOS handle [since SmbiosDxe maintains the
                                      handle DB privately I had to
                                      pick a handle and check if it
                                      clashes with existing records]
           Add this SMBIOS handle to the map.
     else // No generator present
          Proceed without adding any reference


Before Adding any SMBIOS table, we check if there is an existing SMBIOS handle for the CM_OBJECT_TOKEN (the generator will return a CM_OBJECT_TOKEN for each SMBIOS record created).
If there is an existing SMBIOS handle, pass that in, else pass in SMBIOS_HANDLE_PI_RESERVED and let SmbiosDxe assign the handle.

Here is a sample implementation of this approach (it is a WIP, but I wanted to get your thoughts on it)

https://github.com/tianocore/edk2/compare/master...gmahadevan:edk2-upstream:RFC/smbios-dyntables

[SAMI] I had a look at the above branch and have the following suggestions:
a. To resolve the dependency order, please see my patches for SMBIOS table dispatcher at: https://edk2.groups.io/g/devel/message/95340

[GM]
Thanks !
I've setup a new patch/github branch that includes the dispatcher code and the SMBIOS string helper patch.

The SMBIOS string helper and dispatcher code look good to me.

You should be able to apply these patches on your 'edk2-upstream:RFC/smbios-dyntables' branch and enable the dispatcher in ProcessSmbiosTables().
e.g. In file DynamicTablesPkg/Drivers/DynamicTableManagerDxe/DynamicTableManagerDxe.c, the SMBIOS table dispatcher can be invoked once it is initialised as shown below.
@@ -1007,19 +1007,24 @@ ProcessSmbiosTables (
     SmbiosTableCount
     ));
+  // Initialise the SMBIOS Table Dispatcher state machine.
+  InitSmbiosTableDispatcher (SmbiosTableInfo, SmbiosTableCount);
+
   for (Idx = 0; Idx < SmbiosTableCount; Idx++) {
-    Status = BuildAndInstallSmbiosTable (
+    Status = DispatchSmbiosTable (
+               SmbiosTableInfo[Idx].TableType,
                TableFactoryProtocol,
                CfgMgrProtocol,
                SmbiosProtocol,
-               &SmbiosTableInfo[Idx]
+               SmbiosTableInfo,
+               SmbiosTableCount
                );
     if (EFI_ERROR (Status)) {
       DEBUG ((
         DEBUG_ERROR,
-        "ERROR: Failed to install SMBIOS Table." \
-        " Id = %u Status = %r\n",
-        SmbiosTableInfo[Idx].TableGeneratorId,
+        "ERROR: Failed to dispatch SMBIOS Table for installation." \
+        " Table Type = %u Status = %r\n",
+        SmbiosTableInfo[Idx].TableType,
         Status
         ));
     }
b. With the SMBIOS dispatcher patch and the handle manager, it should be possible to update the handles for dependent tables. This should remove the need for the handle generation and management.
c. With regards to the SMBIOS handle manager, I think it would be better to add CM_OBJECT_ID for the SmbiosCmTokenin SMBIOS_HANDLE_MAP.
d. A new SMBIOS object namespace should be defined.
    e.g Namespace ID 1010b or 1100b - SMBIOS Objects, see https://github.com/tianocore/edk2/blob/master/DynamicTablesPkg/Include/ConfigurationManagerObject.h#L30-L34
   With this change, CM_ARM_MEMORY_DEVICE_INFO becomes CM_SMBIOS_MEMORY_DEVICE_INFO
    Similarly, EArmObjMemoryDeviceInfo becomes ESmbiosObjMemoryDeviceInfo
e. With regards to DynamicTableManager.c, I think we should split the ACPI & SMBIOS processing in individual files (e.g. AcpiBuilder.c & SmbiosBuilder.c) under DynamicTableManagerDxe.
f. Status appears to be returned uninitialised in DynamicTableManagerDxeInitialize().
g. DynamicTablesPkg\Library\Smbios\Arm\SmbiosType17Lib can be moved to DynamicTablesPkg\Library\Smbios\SmbiosType17Lib.
I prefer a github branch with the patch as it is very helpful to view the code being reviewed. However, it is difficult to provide feedback. Is it possible to submit a patch for the changes with the link for the guthub branch in the future, please?

[GM]
I've sent a new version of the patch minus the Type17 code as I wanted to just focus on the framework code first.
I've incorporated the comments from above except for the suggestion on using CM_OBJECT_ID instead of the CM_TOKEN for the SmbiosHandleMap.
IMO the CM_TOKEN is better since we can have unique tokens for cases where a single SMBIOS CM_OBJECT_ID can have multiple entries (type17/type9 etc), let me know your thoughts.

Best Regards
Girish

I am not sure if we need an edk2-staging branch for this feature. But if you think it would be helpful then please let me know and I will send out a request to create a new feature branch.
[/SAMI]

Sorry for the long message, please let me know your thoughts.

[/GM]

[SAMI]

+  0,                                     // MemoryErrorInformationHandle
+  0xFFFF,                                // TotalWidth
+  0xFFFF,                                // DataWIdth

[SAMI] I need to find out how these fields should be populated, but the
Annex A, SMBIOS specification version 3.6.0 says the following:

4.8.4 Total Width is not 0FFFFh (Unknown) if the memory device is
installed. (Size is not 0.)

4.8.5 Data Width is not 0FFFFh (Unknown).

Can you explain how this field is used, please?

[/SAMI]

+  0x7FFF,                                // Size (always use Extended Size)

[SAMI] I think this field should be set based on the Size.

The spec says "If the size is 32 GB-1 MB or greater, the field value is
7FFFh and the actual size is stored in the Extended Size field."

I think it would be good to have a static function  that encodes the
size in wither the Size field or the Extended Size field.

e.g. UpdateSmbiosTable17Size (SMBIOS_TABLE_TYPE17 *SmbiosRecord, UINTN
Size) {

          if (Size > 32GB-1MB) {

             SmbiosRecord->Size = EncodeSize (xxx);

           } else {

              SmbiosRecord->ExtendedSize = EncodeExtendedSize (xxx);

          }

     }

[/SAMI]

+  MemoryTypeUnknown,                     // FormFactor
+  0xFF,                                  // DeviceSet
+  1,                                     // Device Locator
+  2,                                     // Bank Locator
+  MemoryTypeSdram,                       // MemoryType
+  {                                      // TypeDetail
+    0
+  },
+  0xFFFF,                                // Speed (Use Extended Speed)

[SAMI] Maybe we need a helper function (similar to
UpdateSmbiosTable17Size()) for this field as well.

+  0,                                     // Manufacturer
+                                         // (Unused Use ModuleManufactuerId)
+  3,                                     // SerialNumber
+  4,                                     // AssetTag
+  0,                                     // PartNumber
+                                         // (Unused Use ModuleProductId)
+  0,                                     // Attributes
+  0,                                     // ExtendedSize
+  2000,                                  // ConfiguredMemoryClockSpeed

[SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?

+  0,                                     // MinimumVoltage
+  0,                                     // MaximumVoltage
+  0,                                     // ConfiguredVoltage
+  MemoryTechnologyDram,                  // MemoryTechnology

[SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?

+  {                                      // MemoryOperatingModeCapability
+    .Uint16 = 0x000
+  },

[SAMI] I think the above initialisation may not be portable.

+  5,                                    // FirmwareVersion
+  0,                                    // ModuleManufacturerId
+  0,                                    // ModuleProductId
+  0,                                    // MemorySubsystemContollerManufacturerId
+  0,                                    // MemorySybsystemControllerProductId
+  0,                                    // NonVolatileSize
+  0,                                    // VolatileSize
+  0,                                    // CacheSize
+  0,                                    // LogicalSize
+  0,                                    // ExtendedSpeed
+  0,                                    // ExtendedConfiguredMemorySpeed
+};
+
+STATIC CHAR8  UnknownStr[] = "Unknown\0";

[SAMI] Would it be possible to add the CONST qualifier, please?

+
+STATIC
+EFI_STATUS
+EFIAPI
+FreeSmbiosType17TableEx (
+  IN      CONST SMBIOS_TABLE_GENERATOR                   *CONST This,
+  IN      CONST CM_STD_OBJ_SMBIOS_TABLE_INFO             *CONST SmbiosTableInfo,
+  IN      CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL     *CONST CfgMgrProtocol,
+  IN OUT        SMBIOS_STRUCTURE                         ***CONST Table,
+  IN      CONST UINTN TableCount
+  )
+{
+  return EFI_SUCCESS;
+}
+
+/** Construct SMBIOS Type17 Table describing memory devices.
+
+  If this function allocates any resources then they must be freed
+  in the FreeXXXXTableResources function.
+
+  @param [in]  This            Pointer to the SMBIOS table generator.
+  @param [in]  SmbiosTableInfo Pointer to the SMBIOS table information.
+  @param [in]  CfgMgrProtocol  Pointer to the Configuration Manager
+                               Protocol interface.
+  @param [out] Table           Pointer to the SMBIOS table.
+
+  @retval EFI_SUCCESS            Table generated successfully.
+  @retval EFI_BAD_BUFFER_SIZE    The size returned by the Configuration
+                                 Manager is less than the Object size for
+                                 the requested object.
+  @retval EFI_INVALID_PARAMETER  A parameter is invalid.
+  @retval EFI_NOT_FOUND          Could not find information.
+  @retval EFI_OUT_OF_RESOURCES   Could not allocate memory.
+  @retval EFI_UNSUPPORTED        Unsupported configuration.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+BuildSmbiosType17TableEx (
+  IN  CONST SMBIOS_TABLE_GENERATOR                         *This,
+  IN        CM_STD_OBJ_SMBIOS_TABLE_INFO           *CONST SmbiosTableInfo,
+  IN  CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL   *CONST CfgMgrProtocol,
+  OUT       SMBIOS_STRUCTURE                               ***Table,
+  OUT       UINTN                                  *CONST  TableCount
+  )
+{
+  EFI_STATUS                 Status;
+  UINT32                     NumMemDevices;
+  SMBIOS_STRUCTURE           **TableList;
+  CM_ARM_MEMORY_DEVICE_INFO  *MemoryDevicesInfo;
+  UINTN                      Index;
+  UINTN                      SerialNumLen;
+  CHAR8                      *SerialNum;
+  UINTN                      AssetTagLen;
+  CHAR8                      *AssetTag;
+  UINTN                      DeviceLocatorLen;
+  CHAR8                      *DeviceLocator;
+  UINTN                      BankLocatorLen;
+  CHAR8                      *BankLocator;
+  UINTN                      FirmwareVersionLen;
+  CHAR8                      *FirmwareVersion;
+  CHAR8                      *OptionalStrings;
+  SMBIOS_TABLE_TYPE17        *SmbiosRecord;
+
+  ASSERT (This != NULL);
+  ASSERT (SmbiosTableInfo != NULL);
+  ASSERT (CfgMgrProtocol != NULL);
+  ASSERT (Table != NULL);
+  ASSERT (TableCount != NULL);
+  ASSERT (SmbiosTableInfo->TableGeneratorId == This->GeneratorID);
+
+  DEBUG ((DEBUG_ERROR, "%a : Start \n", __FUNCTION__));
+  *Table = NULL;
+  Status = GetEArmObjMemoryDeviceInfo (
+             CfgMgrProtocol,
+             CM_NULL_TOKEN,
+             &MemoryDevicesInfo,
+             &NumMemDevices
+             );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((
+      DEBUG_ERROR,
+      "Failed to get Memory Devices CM Object %r\n",
+      Status
+      ));
+    return Status;
+  }
+
+  TableList = (SMBIOS_STRUCTURE **)AllocateZeroPool (sizeof (SMBIOS_STRUCTURE *) * NumMemDevices);

[SAMI] The memory allocated here should be freed in
FreeSmbiosType17TableEx.

+  if (TableList == NULL) {
+    DEBUG ((DEBUG_ERROR, "Failed to alloc memory for %u devices table\n"));
+    Status = EFI_OUT_OF_RESOURCES;
+    goto exit;
+  }
+
+  for (Index = 0; Index < NumMemDevices; Index++) {
+    if (MemoryDevicesInfo[Index].SerialNum != NULL) {
+      SerialNumLen = AsciiStrLen (MemoryDevicesInfo[Index].SerialNum);
+      SerialNum    = MemoryDevicesInfo[Index].SerialNum;
+    } else {
+      SerialNumLen = AsciiStrLen (UnknownStr);
+      SerialNum    = UnknownStr;

[SAMI] If the serial number is not provided, then should the string
field be set to 0?

See Section 6.1.3, SMBIOS Spec Version 3.6.0 which states

"If a string field references no string, a null (0) is placed in that
string field."

[/SAMI]

+    }
+
+    if (MemoryDevicesInfo[Index].AssetTag != NULL) {
+      AssetTagLen = AsciiStrLen (MemoryDevicesInfo[Index].AssetTag);
+      AssetTag    = MemoryDevicesInfo[Index].AssetTag;
+    } else {
+      AssetTagLen = AsciiStrLen (UnknownStr);
+      AssetTag    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].DeviceLocator != NULL) {
+      DeviceLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].DeviceLocator);
+      DeviceLocator    = MemoryDevicesInfo[Index].DeviceLocator;
+    } else {
+      DeviceLocatorLen = AsciiStrLen (UnknownStr);
+      DeviceLocator    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].BankLocator != NULL) {
+      BankLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].BankLocator);
+      BankLocator    = MemoryDevicesInfo[Index].BankLocator;
+    } else {
+      BankLocatorLen = AsciiStrLen (UnknownStr);
+      BankLocator    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].FirmwareVersion != NULL) {
+      FirmwareVersionLen = AsciiStrLen (MemoryDevicesInfo[Index].FirmwareVersion);
+      FirmwareVersion    = MemoryDevicesInfo[Index].FirmwareVersion;
+    } else {
+      FirmwareVersionLen = AsciiStrLen (UnknownStr);
+      FirmwareVersion    = UnknownStr;
+    }
+
+    SmbiosRecord = (SMBIOS_TABLE_TYPE17 *)AllocateZeroPool (
+                                            sizeof (SMBIOS_TABLE_TYPE17) +
+                                            SerialNumLen + 1 +
+                                            AssetTagLen + 1 + DeviceLocatorLen + 1 +
+                                            BankLocatorLen + 1 + FirmwareVersionLen + 1 + 1
+                                            );

[SAMI] The memory allocated here needs to be freed in
FreeSmbiosType17TableEx as  SmbiosProtocol->Add () makes a copy of the
SmbiosTable, see
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FMdeModulePkg%2FUniversal%2FSmbiosDxe%2FSmbiosDxe.c%23L476&;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=EnTxn07ekjA7bGUeCg2c0BaUMVW0yU5JFjXNOcZuhQA%3D&amp;reserved=0
and
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FMdeModulePkg%2FUniversal%2FSmbiosDxe%2FSmbiosDxe.c%23L516&;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=d6kU6CdywK4fnOdxE8CyTTM9eQHDE38FzZB7SA2FTqc%3D&amp;reserved=0.

+    if (SmbiosRecord == NULL) {
+      Status = EFI_OUT_OF_RESOURCES;
+      goto exit;
+    }
+
+    CopyMem (SmbiosRecord, &MemDeviceInfoTemplate, sizeof (SMBIOS_TABLE_TYPE17));
+    SmbiosRecord->ExtendedSize         = MemoryDevicesInfo[Index].Size;

[SAMI] CM_ARM_MEMORY_DEVICE_INFO.Size is documented as size in bytes,
while looking at the SMBIOS specification, section 7.18.5 for the
Extended Size Bits 30:0 represent the size of the memory device in
megabytes.

I think it will be useful to create UpdateSmbiosTable17Size() which does
the appropriate encoding and updation of the SMBIOS table fieds.

[/SAMI]

+    SmbiosRecord->DeviceSet            = MemoryDevicesInfo[Index].DeviceSet;
+    SmbiosRecord->ModuleManufacturerID =
+      MemoryDevicesInfo[Index].ModuleManufacturerId;
+    SmbiosRecord->ModuleProductID =
+      MemoryDevicesInfo[Index].ModuleProductId;
+    SmbiosRecord->Attributes =
+      MemoryDevicesInfo[Index].Attributes;
+    SmbiosRecord->ExtendedSpeed = MemoryDevicesInfo[Index].Speed;
+    OptionalStrings             = (CHAR8 *)(SmbiosRecord + 1);
+    AsciiSPrint (OptionalStrings, DeviceLocatorLen + 1, DeviceLocator);

[SAMI] I think we can simplify the publishing of the SMBIOS strings
using SmbiosStringTableLib. Please see the patch at
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fedk2.groups.io%2Fg%2Fdevel%2Fmessage%2F93651&;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=4xHMP2KfNlcdeBrtH%2FIT1F249uWIoz0XZreF3FSugq8%3D&amp;reserved=0

+    OptionalStrings = OptionalStrings + DeviceLocatorLen + 1;
+    AsciiSPrint (OptionalStrings, BankLocatorLen + 1, BankLocator);
+    OptionalStrings = OptionalStrings + BankLocatorLen + 1;
+    AsciiSPrint (OptionalStrings, SerialNumLen + 1, SerialNum);
+    OptionalStrings = OptionalStrings + SerialNumLen + 1;
+    AsciiSPrint (OptionalStrings, AssetTagLen + 1, AssetTag);
+    OptionalStrings = OptionalStrings + AssetTagLen + 1;
+    AsciiSPrint (OptionalStrings, FirmwareVersionLen + 1, FirmwareVersion);
+    OptionalStrings  = OptionalStrings + FirmwareVersionLen + 1;
+    TableList[Index] = (SMBIOS_STRUCTURE *)SmbiosRecord;
+  }
+
+  *Table      = TableList;
+  *TableCount = NumMemDevices;
+
+exit:
+  DEBUG ((DEBUG_ERROR, "%a : Done \n", __FUNCTION__));
+  return Status;
+}
+
+/** The interface for the SMBIOS Type17 Table Generator.
+*/
+STATIC
+CONST
+SMBIOS_TABLE_GENERATOR  SmbiosType17Generator = {
+  // Generator ID
+  CREATE_STD_SMBIOS_TABLE_GEN_ID (EStdSmbiosTableIdType17),
+  // Generator Description
+  L"SMBIOS.TYPE17.GENERATOR",
+  // SMBIOS Table Type
+  EFI_SMBIOS_TYPE_MEMORY_DEVICE,
+  NULL,
+  NULL,
+  // Build table function Extended.
+  BuildSmbiosType17TableEx,
+  // Free function Extended.
+  FreeSmbiosType17TableEx
+};
+
+/** Register the Generator with the SMBIOS Table Factory.
+
+  @param [in]  ImageHandle  The handle to the image.
+  @param [in]  SystemTable  Pointer to the System Table.
+
+  @retval EFI_SUCCESS           The Generator is registered.
+  @retval EFI_INVALID_PARAMETER A parameter is invalid.
+  @retval EFI_ALREADY_STARTED   The Generator for the Table ID
+                                is already registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibConstructor (
+  IN  EFI_HANDLE        ImageHandle,
+  IN  EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = RegisterSmbiosTableGenerator (&SmbiosType17Generator);
+  DEBUG ((
+    DEBUG_INFO,
+    "SMBIOS Type 17: Register Generator. Status = %r\n",
+    Status
+    ));
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}
+
+/** Deregister the Generator from the SMBIOS Table Factory.
+
+  @param [in]  ImageHandle  The handle to the image.
+  @param [in]  SystemTable  Pointer to the System Table.
+
+  @retval EFI_SUCCESS           The Generator is deregistered.
+  @retval EFI_INVALID_PARAMETER A parameter is invalid.
+  @retval EFI_NOT_FOUND         The Generator is not registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibDestructor (
+  IN  EFI_HANDLE        ImageHandle,
+  IN  EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = DeregisterSmbiosTableGenerator (&SmbiosType17Generator);
+  DEBUG ((
+    DEBUG_INFO,
+    "SMBIOS Type17: Deregister Generator. Status = %r\n",
+    Status
+    ));
+  ASSERT_EFI_ERROR (Status);
+  return Status;
+}
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
new file mode 100644
index 0000000000..78a80b75f0
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
@@ -0,0 +1,32 @@
+## @file
+# SMBIOS Type17 Table Generator
+#
+#  Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#  Copyright (c) 2019 - 2021, Arm Limited. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+  INF_VERSION    = 0x0001001B
+  BASE_NAME      = SmbiosType17LibArm
+  FILE_GUID      = 1f063bac-f8f1-4e08-8ffd-9aae52c75497
+  VERSION_STRING = 1.0
+  MODULE_TYPE    = DXE_DRIVER
+  LIBRARY_CLASS  = NULL|DXE_DRIVER
+  CONSTRUCTOR    = SmbiosType17LibConstructor
+  DESTRUCTOR     = SmbiosType17LibDestructor
+
+[Sources]
+  SmbiosType17Generator.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  EmbeddedPkg/EmbeddedPkg.dec
+  ArmPlatformPkg/ArmPlatformPkg.dec
+  DynamicTablesPkg/DynamicTablesPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib

Hi Girish,

Apologies for the delay in reply.

Please find my response marked inline as [SAMI].

Regards,

Sami Mujawar

On 28/01/2023 12:09 am, Girish Mahadevan wrote:

Hi Sami

Sorry for the long silence. I've sent you v2 of the patch (only framework not the Type17) which includes a link to a github branch.

Few more comments inline , prefixed by [GM].

Best Regards
Girish

On 10/18/2022 9:36 AM, Sami Mujawar via groups.io wrote:

*External email: Use caution opening links or attachments*


Hi Girish,

Please find my response inline marked [SAMI].

Regards,

Sami Mujawar

On 04/10/2022 11:43 pm, Girish Mahadevan via groups.io wrote:

Hello Sami

Thank you so much for your review, I apologize for the late response.

My comment in line about the handle manager [GM].

Best Regards
Girish

On 9/12/2022 8:57 AM, Sami Mujawar wrote:

External email: Use caution opening links or attachments


Hi Girish,

Thank you for this patch and for the effort for bringing forward dynamic
SMBIOS generation.

Please find my feedback inline marked [SAMI].

Regards,

Sami Mujawar

On 26/08/2022 06:37 pm, Girish Mahadevan wrote:

Add a new CM object to describe memory devices and setup a new
Generator Library for SMBIOS Type17 table.

Signed-off-by: Girish Mahadevan<gmahadevan@...>
---
  .../Include/ArmNameSpaceObjects.h             |  59 +++
  .../SmbiosType17Lib/SmbiosType17Generator.c   | 338 ++++++++++++++++++
  .../SmbiosType17Lib/SmbiosType17LibArm.inf    |  32 ++
  3 files changed, 429 insertions(+)
  create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
  create mode 100644 DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf

diff --git a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
index 102e0f96be..199a19e997 100644
--- a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
+++ b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
@@ -63,6 +63,7 @@ typedef enum ArmObjectID {
    EArmObjPciInterruptMapInfo,          ///< 39 - Pci Interrupt Map Info
    EArmObjRmr,                          ///< 40 - Reserved Memory Range Node
    EArmObjMemoryRangeDescriptor,        ///< 41 - Memory Range Descriptor
+  EArmObjMemoryDeviceInfo,             ///< 42 - Memory Device Information
    EArmObjMax
  } EARM_OBJECT_ID;

@@ -1070,6 +1071,64 @@ typedef struct CmArmRmrDescriptor {
    UINT64    Length;
  } CM_ARM_MEMORY_RANGE_DESCRIPTOR;

+/** A structure that describes the physical memory device.
+
+  The physical memory devices on the system are described by this object.
+
+  SMBIOS Specification v3.5.0 Type17
+
+  ID: EArmObjMemoryDeviceInfo,
+*/
+typedef struct CmArmMemoryDeviceInfo {

[SAMI] I think we may need a Token pointing to the Type 16 object so
that the Physical Memory Array Handle can be setup, see my comment below
about the HandleManager.

+  /** Size of the device.
+    Size of the device in bytes.
+  */
+  UINT64  Size;
+
+  /** Device Set */
+  UINT8   DeviceSet;
+
+  /** Speed of the device
+    Speed of the device in MegaTransfers/second.
+  */
+  UINT32  Speed;
+
+  /** Serial Number of device  */
+  CHAR8   *SerialNum;
+
+  /** AssetTag identifying the device */
+  CHAR8   *AssetTag;
+
+  /** Device Locator String for the device.
+   String that describes the slot or position of the device on the board.
+   */
+  CHAR8   *DeviceLocator;
+
+  /** Bank locator string for the device.
+   String that describes the bank where the device is located.
+   */
+  CHAR8   *BankLocator;
+
+  /** Firmware version of the memory device */
+  CHAR8   *FirmwareVersion;
+
+  /** Manufacturer Id.
+   2 byte Manufacturer Id as per JEDEC Standard JEP106AV
+  */
+  UINT16  ModuleManufacturerId;
+
+  /** Manufacturer Product Id
+   2 byte Manufacturer Id as designated by Manufacturer.
+  */
+  UINT16  ModuleProductId;
+
+  /** Device Attributes */
+  UINT8   Attributes;
+
+  /** Device Configured Voltage in millivolts */
+  UINT16  ConfiguredVoltage;

[SAMI] This field does not appear to be used in the generator. If the
intention is to use this in the future, then it may be better to add
this at a later stage.

+} CM_ARM_MEMORY_DEVICE_INFO;
+
  #pragma pack()

  #endif // ARM_NAMESPACE_OBJECTS_H_
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
new file mode 100644
index 0000000000..5683ca570f
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
@@ -0,0 +1,338 @@
+/** @file
+  SMBIOS Type17 Table Generator.
+
+  Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+  Copyright (c) 2020 - 2021, Arm Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PrintLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/SmbiosType17FixupLib.h>

[SAMI] I could not find SmbiosType17FixupLib.h in this patch series. Can
you check, please?

+
+// Module specific include files.
+#include <ConfigurationManagerObject.h>
+#include <ConfigurationManagerHelper.h>
+#include <Protocol/ConfigurationManagerProtocol.h>
+#include <Protocol/Smbios.h>

[SAMI] I think Protocol/Smbios.h may not be required in this file. Can
you check, please?

+#include <IndustryStandard/SmBios.h>
+
+/** This macro expands to a function that retrieves the Memory Device
+    information from the Configuration Manager.
+*/
+GET_OBJECT_LIST (
+  EObjNameSpaceArm,
+  EArmObjMemoryDeviceInfo,
+  CM_ARM_MEMORY_DEVICE_INFO
+  )
+
+// Default Values for Memory Device
+STATIC SMBIOS_TABLE_TYPE17 MemDeviceInfoTemplate = {
+  {                                      // Hdr
+    EFI_SMBIOS_TYPE_MEMORY_DEVICE,       // Type
+    sizeof (SMBIOS_TABLE_TYPE17),        // Length
+    0                                    // Handle
+  },
+  0,                                     // MemoryArrayHandle

[SAMI] Do you have any thoughts on how the MemoryArrayHandle can be setup?

The same applies for the following MemoryErrorInformationHandle field.

I think we need some sort of a HandleManager in DynamicTablesFramework
that can keep track of the mappings between SMBIOS Objects and Table
Handles.

e.g. Smbios - HandleManager

+-------------------------------+-------------------------------+

       |    Object Token               | Table Handle                  |

+-------------------------------+-------------------------------+

       | Type16Obj_token         | Type 16 Table handle    |

+-------------------------------+-------------------------------+

       ...

- The Type17Object i.e. CM_ARM_MEMORY_DEVICE_INFO can then hold a token
for the Type16Object.

  - If Type 17 table is to be installed, DynamicTablemanager shall
search the SMBIOS table list to see if a Type16 table is requested to be
installed.

- If a Type16 table is present in the list of SMBIOS table to install,
the Type16 table shall be installed first and an entry is made in the
Smbios HandleManager to create a mapping of Type16Obj_token <==> Type16
Table Handle.

- The Type17 table can now be built and if a the Type16Object token is
provided in CM_ARM_MEMORY_DEVICE_INFO, the Smbios HandleManager shall be
searched (using Type16Obj_token) to retrieve the Type16 Table handle and
populate the Type 17 Physical Memory Array Handle field.

I think we may have to experiment a bit before we arrive at the correct
design. However, please do let me know your thoughts on the above.

[GM] I agree with the idea of having a map of CM_OBJECT_TOKENs to SMBIOS handles. I've added this to the DynamicTableFactoryProtocol.

However when it comes to actually figuring out and adding the reference SMBIOS handle We've come up with a slightly different approach.

If I understood what you were saying above is:
 If we happen to parse a Type17 table
   if that Type17 table has a token to a Physical memory array CM_OBJ
     if there is an existing Smbios Handle (look up this handle using
                                             the CM_OBJECT_TOKEN)
         then use this handle.
     else if there is a generator for Type16 registered
         call the Type16 generator code first

IMO this gets a bit difficult to manage. Right now the DynamicTableManagerDxe walks the array of EStdObjSmbiosTableList CM objects, finds the generator for each Table, invokes it, gets an SMBIOS record that it then installs via the SmbiosDxe driver.
It seemed a bit convoluted to call the generator and install an SMBIOS table while within the generator of another Smbios table.
And if there are layers of dependencies (or multiple dependencies) it could add to the complexities.

Instead what we came up with is:

If we happen to parse a Type17 table
  if that Type17 table has a token to a Physical memory array CM_OBJ
     if there is an existing Smbios Handle (look up this handle using
                                             the CM_OBJECT_TOKEN )
         then use this handle.
     else if there is a generator for Type16 Registered
           Generate an SMBIOS handle [since SmbiosDxe maintains the
                                      handle DB privately I had to
                                      pick a handle and check if it
                                      clashes with existing records]
           Add this SMBIOS handle to the map.
     else // No generator present
          Proceed without adding any reference


Before Adding any SMBIOS table, we check if there is an existing SMBIOS handle for the CM_OBJECT_TOKEN (the generator will return a CM_OBJECT_TOKEN for each SMBIOS record created).
If there is an existing SMBIOS handle, pass that in, else pass in SMBIOS_HANDLE_PI_RESERVED and let SmbiosDxe assign the handle.

Here is a sample implementation of this approach (it is a WIP, but I wanted to get your thoughts on it)

https://github.com/tianocore/edk2/compare/master...gmahadevan:edk2-upstream:RFC/smbios-dyntables

[SAMI] I had a look at the above branch and have the following suggestions:

a. To resolve the dependency order, please see my patches for SMBIOS table dispatcher at: https://edk2.groups.io/g/devel/message/95340

[GM]
Thanks !
I've setup a new patch/github branch that includes the dispatcher code and the SMBIOS string helper patch.

The SMBIOS string helper and dispatcher code look good to me.

You should be able to apply these patches on your 'edk2-upstream:RFC/smbios-dyntables' branch and enable the dispatcher in ProcessSmbiosTables().

e.g. In file DynamicTablesPkg/Drivers/DynamicTableManagerDxe/DynamicTableManagerDxe.c, the SMBIOS table dispatcher can be invoked once it is initialised as shown below.

@@ -1007,19 +1007,24 @@ ProcessSmbiosTables (
      SmbiosTableCount
      ));

+  // Initialise the SMBIOS Table Dispatcher state machine.
+  InitSmbiosTableDispatcher (SmbiosTableInfo, SmbiosTableCount);
+
    for (Idx = 0; Idx < SmbiosTableCount; Idx++) {
-    Status = BuildAndInstallSmbiosTable (
+    Status = DispatchSmbiosTable (
+               SmbiosTableInfo[Idx].TableType,
                 TableFactoryProtocol,
                 CfgMgrProtocol,
                 SmbiosProtocol,
-               &SmbiosTableInfo[Idx]
+               SmbiosTableInfo,
+               SmbiosTableCount
                 );
      if (EFI_ERROR (Status)) {
        DEBUG ((
          DEBUG_ERROR,
-        "ERROR: Failed to install SMBIOS Table." \
-        " Id = %u Status = %r\n",
-        SmbiosTableInfo[Idx].TableGeneratorId,
+        "ERROR: Failed to dispatch SMBIOS Table for installation." \
+        " Table Type = %u Status = %r\n",
+        SmbiosTableInfo[Idx].TableType,
          Status
          ));
      }

b. With the SMBIOS dispatcher patch and the handle manager, it should be possible to update the handles for dependent tables. This should remove the need for the handle generation and management.

c. With regards to the SMBIOS handle manager, I think it would be better to add CM_OBJECT_ID for the SmbiosCmTokenin SMBIOS_HANDLE_MAP.

d. A new SMBIOS object namespace should be defined.

     e.g Namespace ID 1010b or 1100b - SMBIOS Objects, see https://github.com/tianocore/edk2/blob/master/DynamicTablesPkg/Include/ConfigurationManagerObject.h#L30-L34

    With this change, CM_ARM_MEMORY_DEVICE_INFO becomes CM_SMBIOS_MEMORY_DEVICE_INFO

     Similarly, EArmObjMemoryDeviceInfo becomes ESmbiosObjMemoryDeviceInfo

e. With regards to DynamicTableManager.c, I think we should split the ACPI & SMBIOS processing in individual files (e.g. AcpiBuilder.c & SmbiosBuilder.c) under DynamicTableManagerDxe.

f. Status appears to be returned uninitialised in DynamicTableManagerDxeInitialize().

g. DynamicTablesPkg\Library\Smbios\Arm\SmbiosType17Lib can be moved to DynamicTablesPkg\Library\Smbios\SmbiosType17Lib.

I prefer a github branch with the patch as it is very helpful to view the code being reviewed. However, it is difficult to provide feedback. Is it possible to submit a patch for the changes with the link for the guthub branch in the future, please?

[GM]
I've sent a new version of the patch minus the Type17 code as I wanted to just focus on the framework code first.
I've incorporated the comments from above except for the suggestion on using CM_OBJECT_ID instead of the CM_TOKEN for the SmbiosHandleMap.

[SAMI] Sorry for not being clear in my earlier response. I meant we need CM_OBJECT_ID in addition to the CM_OBJECT_TOKEN. See example below:
typedef struct SmbiosHandleCmObjMap {
  ESTD_SMBIOS_TABLE_ID  SmbiosTableId;
  SMBIOS_HANDLE         SmbiosTblHandle;
  +CM_OBJECT_ID          ObjectId;
  CM_OBJECT_TOKEN       SmbiosCmToken;
} SMBIOS_HANDLE_MAP;

Otherwise it would not be possible to identify the type of object pointed by SmbiosCmToken, right?

[/SAMI]

IMO the CM_TOKEN is better since we can have unique tokens for cases where a single SMBIOS CM_OBJECT_ID can have multiple entries (type17/type9 etc), let me know your thoughts.

[SAMI] I think I am missing something, can you explain the scenario, please?

Best Regards
Girish

I am not sure if we need an edk2-staging branch for this feature. But if you think it would be helpful then please let me know and I will send out a request to create a new feature branch.

[/SAMI]

Sorry for the long message, please let me know your thoughts.

[/GM]

[SAMI]

+ 0,                                     // MemoryErrorInformationHandle
+  0xFFFF,                                // TotalWidth
+  0xFFFF,                                // DataWIdth

[SAMI] I need to find out how these fields should be populated, but the
Annex A, SMBIOS specification version 3.6.0 says the following:

4.8.4 Total Width is not 0FFFFh (Unknown) if the memory device is
installed. (Size is not 0.)

4.8.5 Data Width is not 0FFFFh (Unknown).

Can you explain how this field is used, please?

[/SAMI]

+ 0x7FFF,                                // Size (always use Extended Size)

[SAMI] I think this field should be set based on the Size.

The spec says "If the size is 32 GB-1 MB or greater, the field value is
7FFFh and the actual size is stored in the Extended Size field."

I think it would be good to have a static function  that encodes the
size in wither the Size field or the Extended Size field.

e.g. UpdateSmbiosTable17Size (SMBIOS_TABLE_TYPE17 *SmbiosRecord, UINTN
Size) {

          if (Size > 32GB-1MB) {

             SmbiosRecord->Size = EncodeSize (xxx);

           } else {

              SmbiosRecord->ExtendedSize = EncodeExtendedSize (xxx);

          }

     }

[/SAMI]

+ MemoryTypeUnknown,                     // FormFactor
+  0xFF,                                  // DeviceSet
+  1,                                     // Device Locator
+  2,                                     // Bank Locator
+  MemoryTypeSdram,                       // MemoryType
+  {                                      // TypeDetail
+    0
+  },
+  0xFFFF,                                // Speed (Use Extended Speed)

[SAMI] Maybe we need a helper function (similar to
UpdateSmbiosTable17Size()) for this field as well.

+ 0,                                     // Manufacturer
+                                         // (Unused Use ModuleManufactuerId)
+  3,                                     // SerialNumber
+  4,                                     // AssetTag
+  0,                                     // PartNumber
+                                         // (Unused Use ModuleProductId)
+  0,                                     // Attributes
+  0,                                     // ExtendedSize
+  2000,                                  // ConfiguredMemoryClockSpeed

[SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?

+ 0,                                     // MinimumVoltage
+  0,                                     // MaximumVoltage
+  0,                                     // ConfiguredVoltage
+  MemoryTechnologyDram,                  // MemoryTechnology

[SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?

+ {                                      // MemoryOperatingModeCapability
+    .Uint16 = 0x000
+  },

[SAMI] I think the above initialisation may not be portable.

+ 5,                                    // FirmwareVersion
+  0,                                    // ModuleManufacturerId
+  0,                                    // ModuleProductId
+  0,                                    // MemorySubsystemContollerManufacturerId
+  0,                                    // MemorySybsystemControllerProductId
+  0,                                    // NonVolatileSize
+  0,                                    // VolatileSize
+  0,                                    // CacheSize
+  0,                                    // LogicalSize
+  0,                                    // ExtendedSpeed
+  0,                                    // ExtendedConfiguredMemorySpeed
+};
+
+STATIC CHAR8  UnknownStr[] = "Unknown\0";

[SAMI] Would it be possible to add the CONST qualifier, please?

+
+STATIC
+EFI_STATUS
+EFIAPI
+FreeSmbiosType17TableEx (
+  IN      CONST SMBIOS_TABLE_GENERATOR *CONST    This,
+  IN      CONST CM_STD_OBJ_SMBIOS_TABLE_INFO *CONST    SmbiosTableInfo,
+  IN      CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST    CfgMgrProtocol,
+  IN OUT        SMBIOS_STRUCTURE ***CONST  Table,
+  IN      CONST UINTN TableCount
+  )
+{
+  return EFI_SUCCESS;
+}
+
+/** Construct SMBIOS Type17 Table describing memory devices.
+
+  If this function allocates any resources then they must be freed
+  in the FreeXXXXTableResources function.
+
+  @param [in]  This            Pointer to the SMBIOS table generator.
+  @param [in]  SmbiosTableInfo Pointer to the SMBIOS table information.
+  @param [in]  CfgMgrProtocol  Pointer to the Configuration Manager
+                               Protocol interface.
+  @param [out] Table           Pointer to the SMBIOS table.
+
+  @retval EFI_SUCCESS            Table generated successfully.
+  @retval EFI_BAD_BUFFER_SIZE    The size returned by the Configuration
+                                 Manager is less than the Object size for
+                                 the requested object.
+  @retval EFI_INVALID_PARAMETER  A parameter is invalid.
+  @retval EFI_NOT_FOUND          Could not find information.
+  @retval EFI_OUT_OF_RESOURCES   Could not allocate memory.
+  @retval EFI_UNSUPPORTED        Unsupported configuration.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+BuildSmbiosType17TableEx (
+  IN  CONST SMBIOS_TABLE_GENERATOR                         *This,
+  IN        CM_STD_OBJ_SMBIOS_TABLE_INFO *CONST  SmbiosTableInfo,
+  IN  CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST  CfgMgrProtocol,
+  OUT SMBIOS_STRUCTURE                               ***Table,
+  OUT       UINTN *CONST  TableCount
+  )
+{
+  EFI_STATUS                 Status;
+  UINT32                     NumMemDevices;
+  SMBIOS_STRUCTURE           **TableList;
+  CM_ARM_MEMORY_DEVICE_INFO  *MemoryDevicesInfo;
+  UINTN                      Index;
+  UINTN                      SerialNumLen;
+  CHAR8                      *SerialNum;
+  UINTN                      AssetTagLen;
+  CHAR8                      *AssetTag;
+  UINTN                      DeviceLocatorLen;
+  CHAR8                      *DeviceLocator;
+  UINTN                      BankLocatorLen;
+  CHAR8                      *BankLocator;
+  UINTN                      FirmwareVersionLen;
+  CHAR8                      *FirmwareVersion;
+  CHAR8                      *OptionalStrings;
+  SMBIOS_TABLE_TYPE17        *SmbiosRecord;
+
+  ASSERT (This != NULL);
+  ASSERT (SmbiosTableInfo != NULL);
+  ASSERT (CfgMgrProtocol != NULL);
+  ASSERT (Table != NULL);
+  ASSERT (TableCount != NULL);
+  ASSERT (SmbiosTableInfo->TableGeneratorId == This->GeneratorID);
+
+  DEBUG ((DEBUG_ERROR, "%a : Start \n", __FUNCTION__));
+  *Table = NULL;
+  Status = GetEArmObjMemoryDeviceInfo (
+             CfgMgrProtocol,
+             CM_NULL_TOKEN,
+             &MemoryDevicesInfo,
+             &NumMemDevices
+             );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((
+      DEBUG_ERROR,
+      "Failed to get Memory Devices CM Object %r\n",
+      Status
+      ));
+    return Status;
+  }
+
+  TableList = (SMBIOS_STRUCTURE **)AllocateZeroPool (sizeof (SMBIOS_STRUCTURE *) * NumMemDevices);

[SAMI] The memory allocated here should be freed in
FreeSmbiosType17TableEx.

+  if (TableList == NULL) {
+    DEBUG ((DEBUG_ERROR, "Failed to alloc memory for %u devices table\n"));
+    Status = EFI_OUT_OF_RESOURCES;
+    goto exit;
+  }
+
+  for (Index = 0; Index < NumMemDevices; Index++) {
+    if (MemoryDevicesInfo[Index].SerialNum != NULL) {
+      SerialNumLen = AsciiStrLen (MemoryDevicesInfo[Index].SerialNum);
+      SerialNum    = MemoryDevicesInfo[Index].SerialNum;
+    } else {
+      SerialNumLen = AsciiStrLen (UnknownStr);
+      SerialNum    = UnknownStr;

[SAMI] If the serial number is not provided, then should the string
field be set to 0?

See Section 6.1.3, SMBIOS Spec Version 3.6.0 which states

"If a string field references no string, a null (0) is placed in that
string field."

[/SAMI]

+    }
+
+    if (MemoryDevicesInfo[Index].AssetTag != NULL) {
+      AssetTagLen = AsciiStrLen (MemoryDevicesInfo[Index].AssetTag);
+      AssetTag    = MemoryDevicesInfo[Index].AssetTag;
+    } else {
+      AssetTagLen = AsciiStrLen (UnknownStr);
+      AssetTag    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].DeviceLocator != NULL) {
+      DeviceLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].DeviceLocator);
+      DeviceLocator    = MemoryDevicesInfo[Index].DeviceLocator;
+    } else {
+      DeviceLocatorLen = AsciiStrLen (UnknownStr);
+      DeviceLocator    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].BankLocator != NULL) {
+      BankLocatorLen = AsciiStrLen (MemoryDevicesInfo[Index].BankLocator);
+      BankLocator    = MemoryDevicesInfo[Index].BankLocator;
+    } else {
+      BankLocatorLen = AsciiStrLen (UnknownStr);
+      BankLocator    = UnknownStr;
+    }
+
+    if (MemoryDevicesInfo[Index].FirmwareVersion != NULL) {
+      FirmwareVersionLen = AsciiStrLen (MemoryDevicesInfo[Index].FirmwareVersion);
+      FirmwareVersion    = MemoryDevicesInfo[Index].FirmwareVersion;
+    } else {
+      FirmwareVersionLen = AsciiStrLen (UnknownStr);
+      FirmwareVersion    = UnknownStr;
+    }
+
+    SmbiosRecord = (SMBIOS_TABLE_TYPE17 *)AllocateZeroPool (
+                                            sizeof (SMBIOS_TABLE_TYPE17) +
+                                            SerialNumLen + 1 +
+                                            AssetTagLen + 1 + DeviceLocatorLen + 1 +
+ BankLocatorLen + 1 + FirmwareVersionLen + 1 + 1
+                                            );

[SAMI] The memory allocated here needs to be freed in
FreeSmbiosType17TableEx as  SmbiosProtocol->Add () makes a copy of the
SmbiosTable, see
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FMdeModulePkg%2FUniversal%2FSmbiosDxe%2FSmbiosDxe.c%23L476&;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=EnTxn07ekjA7bGUeCg2c0BaUMVW0yU5JFjXNOcZuhQA%3D&amp;reserved=0
and
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+    if (SmbiosRecord == NULL) {
+      Status = EFI_OUT_OF_RESOURCES;
+      goto exit;
+    }
+
+    CopyMem (SmbiosRecord, &MemDeviceInfoTemplate, sizeof (SMBIOS_TABLE_TYPE17));
+    SmbiosRecord->ExtendedSize         = MemoryDevicesInfo[Index].Size;

[SAMI] CM_ARM_MEMORY_DEVICE_INFO.Size is documented as size in bytes,
while looking at the SMBIOS specification, section 7.18.5 for the
Extended Size Bits 30:0 represent the size of the memory device in
megabytes.

I think it will be useful to create UpdateSmbiosTable17Size() which does
the appropriate encoding and updation of the SMBIOS table fieds.

[/SAMI]

+ SmbiosRecord->DeviceSet            = MemoryDevicesInfo[Index].DeviceSet;
+    SmbiosRecord->ModuleManufacturerID =
+      MemoryDevicesInfo[Index].ModuleManufacturerId;
+    SmbiosRecord->ModuleProductID =
+      MemoryDevicesInfo[Index].ModuleProductId;
+    SmbiosRecord->Attributes =
+      MemoryDevicesInfo[Index].Attributes;
+    SmbiosRecord->ExtendedSpeed = MemoryDevicesInfo[Index].Speed;
+    OptionalStrings             = (CHAR8 *)(SmbiosRecord + 1);
+    AsciiSPrint (OptionalStrings, DeviceLocatorLen + 1, DeviceLocator);

[SAMI] I think we can simplify the publishing of the SMBIOS strings
using SmbiosStringTableLib. Please see the patch at
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fedk2.groups.io%2Fg%2Fdevel%2Fmessage%2F93651&;data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=4xHMP2KfNlcdeBrtH%2FIT1F249uWIoz0XZreF3FSugq8%3D&amp;reserved=0

+    OptionalStrings = OptionalStrings + DeviceLocatorLen + 1;
+    AsciiSPrint (OptionalStrings, BankLocatorLen + 1, BankLocator);
+    OptionalStrings = OptionalStrings + BankLocatorLen + 1;
+    AsciiSPrint (OptionalStrings, SerialNumLen + 1, SerialNum);
+    OptionalStrings = OptionalStrings + SerialNumLen + 1;
+    AsciiSPrint (OptionalStrings, AssetTagLen + 1, AssetTag);
+    OptionalStrings = OptionalStrings + AssetTagLen + 1;
+    AsciiSPrint (OptionalStrings, FirmwareVersionLen + 1, FirmwareVersion);
+    OptionalStrings  = OptionalStrings + FirmwareVersionLen + 1;
+    TableList[Index] = (SMBIOS_STRUCTURE *)SmbiosRecord;
+  }
+
+  *Table      = TableList;
+  *TableCount = NumMemDevices;
+
+exit:
+  DEBUG ((DEBUG_ERROR, "%a : Done \n", __FUNCTION__));
+  return Status;
+}
+
+/** The interface for the SMBIOS Type17 Table Generator.
+*/
+STATIC
+CONST
+SMBIOS_TABLE_GENERATOR  SmbiosType17Generator = {
+  // Generator ID
+  CREATE_STD_SMBIOS_TABLE_GEN_ID (EStdSmbiosTableIdType17),
+  // Generator Description
+  L"SMBIOS.TYPE17.GENERATOR",
+  // SMBIOS Table Type
+  EFI_SMBIOS_TYPE_MEMORY_DEVICE,
+  NULL,
+  NULL,
+  // Build table function Extended.
+  BuildSmbiosType17TableEx,
+  // Free function Extended.
+  FreeSmbiosType17TableEx
+};
+
+/** Register the Generator with the SMBIOS Table Factory.
+
+  @param [in]  ImageHandle  The handle to the image.
+  @param [in]  SystemTable  Pointer to the System Table.
+
+  @retval EFI_SUCCESS           The Generator is registered.
+  @retval EFI_INVALID_PARAMETER A parameter is invalid.
+  @retval EFI_ALREADY_STARTED   The Generator for the Table ID
+                                is already registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibConstructor (
+  IN  EFI_HANDLE        ImageHandle,
+  IN  EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = RegisterSmbiosTableGenerator (&SmbiosType17Generator);
+  DEBUG ((
+    DEBUG_INFO,
+    "SMBIOS Type 17: Register Generator. Status = %r\n",
+    Status
+    ));
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}
+
+/** Deregister the Generator from the SMBIOS Table Factory.
+
+  @param [in]  ImageHandle  The handle to the image.
+  @param [in]  SystemTable  Pointer to the System Table.
+
+  @retval EFI_SUCCESS           The Generator is deregistered.
+  @retval EFI_INVALID_PARAMETER A parameter is invalid.
+  @retval EFI_NOT_FOUND         The Generator is not registered.
+**/
+EFI_STATUS
+EFIAPI
+SmbiosType17LibDestructor (
+  IN  EFI_HANDLE        ImageHandle,
+  IN  EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  Status = DeregisterSmbiosTableGenerator (&SmbiosType17Generator);
+  DEBUG ((
+    DEBUG_INFO,
+    "SMBIOS Type17: Deregister Generator. Status = %r\n",
+    Status
+    ));
+  ASSERT_EFI_ERROR (Status);
+  return Status;
+}
diff --git a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
new file mode 100644
index 0000000000..78a80b75f0
--- /dev/null
+++ b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
@@ -0,0 +1,32 @@
+## @file
+# SMBIOS Type17 Table Generator
+#
+#  Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#  Copyright (c) 2019 - 2021, Arm Limited. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+  INF_VERSION    = 0x0001001B
+  BASE_NAME      = SmbiosType17LibArm
+  FILE_GUID      = 1f063bac-f8f1-4e08-8ffd-9aae52c75497
+  VERSION_STRING = 1.0
+  MODULE_TYPE    = DXE_DRIVER
+  LIBRARY_CLASS  = NULL|DXE_DRIVER
+  CONSTRUCTOR    = SmbiosType17LibConstructor
+  DESTRUCTOR     = SmbiosType17LibDestructor
+
+[Sources]
+  SmbiosType17Generator.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  EmbeddedPkg/EmbeddedPkg.dec
+  ArmPlatformPkg/ArmPlatformPkg.dec
+  DynamicTablesPkg/DynamicTablesPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib