The driver is used to manage EDK2 Redfish Configuration Handler
Protocol installed by EDK2 Redfish feature drivers.
This is the EDK2 Redfish client driver written based on the EDK2
Redfish foundation to initialize EDK2 Redfish feature drivers.

EDK2 Redfish feature drivers are used to provision/consume/update
the firmware owns Redfish properties during system power on
initialization.

RedfishConfigHandlerCommon.c has the common code for the driver
instances used in different EDK2 boot phases or used by different
driver models in the future contribution.

Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
Signed-off-by: Siyuan Fu <siyuan.fu@intel.com>
Signed-off-by: Fan Wang <fan.wang@intel.com>
Signed-off-by: Abner Chang <abner.chang@hpe.com>

Cc: Nickle Wang <nickle.wang@hpe.com>
---
 RedfishPkg/RedfishComponents.dsc.inc          |   3 +-
 RedfishPkg/Redfish.fdf.inc                    |   3 +-
 .../RedfishConfigHandlerDriver.inf            |  60 ++
 .../RedfishConfigHandlerCommon.h              | 101 +++
 .../RedfishConfigHandlerDriver.h              | 159 +++++
 .../RedfishConfigHandlerCommon.c              | 265 ++++++++
 .../RedfishConfigHandlerDriver.c              | 587 ++++++++++++++++++
 7 files changed, 1176 insertions(+), 2 deletions(-)
 create mode 100644 RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
 create mode 100644 RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
 create mode 100644 RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
 create mode 100644 RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
 create mode 100644 RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c

diff --git a/RedfishPkg/RedfishComponents.dsc.inc b/RedfishPkg/RedfishComponents.dsc.inc
index 08f1d3bc32..d0116f065c 100644
--- a/RedfishPkg/RedfishComponents.dsc.inc
+++ b/RedfishPkg/RedfishComponents.dsc.inc
@@ -6,7 +6,7 @@
 # of EDKII Redfish drivers according to the value of flags described in
 # "RedfishDefines.dsc.inc".
 #
-# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
 #
 #    SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -17,4 +17,5 @@
   RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
   RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
   RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
+  RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
 !endif
diff --git a/RedfishPkg/Redfish.fdf.inc b/RedfishPkg/Redfish.fdf.inc
index a64fd119a9..9673246b3f 100644
--- a/RedfishPkg/Redfish.fdf.inc
+++ b/RedfishPkg/Redfish.fdf.inc
@@ -5,7 +5,7 @@
 # by using "!include RedfishPkg/RedfisLibs.fdf.inc" to specify the module instances
 # to be built in the firmware volume.
 #
-# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
 #
 #    SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -15,4 +15,5 @@
   INF RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
   INF RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
   INF RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
+  INF RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
 !endif
diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
new file mode 100644
index 0000000000..def91c7531
--- /dev/null
+++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
@@ -0,0 +1,60 @@
+## @file
+#  INF file for the UEFI driver model Redfish Configuration Handler
+#  Driver.
+#
+#  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+#  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION               = 0x0001000b
+  BASE_NAME                 = RedfishConfigHandlerDriver
+  FILE_GUID                 = 6e881000-5749-11e8-9bf0-8cdcd426c973
+  MODULE_TYPE               = UEFI_DRIVER
+  VERSION_STRING            = 1.0
+  ENTRY_POINT               = RedfishConfigHandlerDriverEntryPoint
+  UNLOAD_IMAGE              = RedfishConfigHandlerDriverUnload
+
+#
+#  VALID_ARCHITECTURES      = IA32 X64 ARM AARCH64 RISCV64
+#
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  NetworkPkg/NetworkPkg.dec
+  RedfishPkg/RedfishPkg.dec
+
+[Sources]
+  RedfishConfigHandlerDriver.h
+  RedfishConfigHandlerDriver.c
+  RedfishConfigHandlerCommon.h
+  RedfishConfigHandlerCommon.c
+
+[LibraryClasses]
+  BaseLib
+  BaseMemoryLib
+  DebugLib
+  UefiLib
+  MemoryAllocationLib
+  NetLib
+  UefiBootServicesTableLib
+  UefiDriverEntryPoint
+
+[Protocols]
+  gEfiRedfishDiscoverProtocolGuid         ## CONSUMES
+  gEfiRestExServiceBindingProtocolGuid
+  gEfiRestExProtocolGuid                  ## CONSUMES
+  gEdkIIRedfishCredentialProtocolGuid     ## CONSUMES
+  gEdkIIRedfishConfigHandlerProtocolGuid  ## CONSUMES
+
+[Guids]
+  gEfiEventExitBootServicesGuid           ## CONSUMES ## Event
+  gEfiEndOfDxeEventGroupGuid              ## CONSUMES ## Event
+
+[Depex]
+  TRUE
+
diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
new file mode 100644
index 0000000000..5e46c42219
--- /dev/null
+++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
@@ -0,0 +1,101 @@
+/** @file
+  Common Header file for Redfish Configuration Handler UEFI driver
+  and DXE driver.
+
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
+#define EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
+
+#include <Uefi.h>
+
+//
+// Libraries
+//
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/NetLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/UefiLib.h>
+
+//
+// Consumed Protocols
+//
+#include <Protocol/EdkIIRedfishCredential.h>
+#include <Protocol/EdkIIRedfishConfigHandler.h>
+
+//
+// Driver Version
+//
+#define REDFISH_CONFIG_VERSION  0x00000001
+
+///
+///  Internal structure used by Redfish Config DXE driver.
+///
+typedef struct {
+  UINT32        CallerId;  ///< Caller ID used to indicate Redfish Config Handler
+                           ///< has been initiated
+  EFI_HANDLE    Image;     ///< Image handle of Redfish Config Driver
+  EFI_EVENT     Event;     ///< Event for the notification of EFI_REDFISH_CONFIG_HANDLER_PROTOCOL
+  REDFISH_CONFIG_SERVICE_INFORMATION RedfishServiceInfo; /// Redfish Service information discovered
+} REDFISH_CONFIG_DRIVER_DATA;
+
+/**
+  Common code of unloading image for both UEFI/DXE Redfish Configuration drivers.
+
+  @param[in]  ImageHandle       Handle that identifies the image to be unloaded.
+
+  @retval EFI_SUCCESS           The image has been unloaded.
+
+**/
+EFI_STATUS
+RedfishConfigDriverCommonUnload (
+  IN EFI_HANDLE  ImageHandle
+  );
+
+/**
+  This is the common code for Redfish configuration UEFI and DXE driver
+  initialization.
+
+  @param[in]  ImageHandle       The firmware allocated handle for the UEFI image.
+  @param[in]  SystemTable       A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS           The operation completed successfully.
+  @retval Others                An unexpected error occurred.
+**/
+EFI_STATUS
+RedfishConfigCommonInit (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  );
+
+/**
+  This is the common code to stop EDK2 Redfish feature driver.
+
+  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
+                         stopped.
+  @retval Others         An unexpected error occurred.
+**/
+EFI_STATUS
+RedfishConfigCommonStop (
+  VOID
+);
+
+/**
+  Callback function executed when a Redfish Config Handler Protocol is installed
+  by EDK2 Redfish Feature Drivers.
+
+**/
+VOID
+RedfishConfigHandlerInitialization (
+  VOID
+  );
+
+#endif
diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
new file mode 100644
index 0000000000..58202c41e2
--- /dev/null
+++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
@@ -0,0 +1,159 @@
+/** @file
+  Header file of Redfish Configuration Handler UEFI driver.
+
+  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
+#define EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
+
+#include "RedfishConfigHandlerCommon.h"
+
+//
+// UEFI Driver Model Protocols
+//
+
+#include <Protocol/DriverBinding.h>
+#include <Protocol/RedfishDiscover.h>
+#include <Protocol/RestEx.h>
+
+//
+// Protocol instances
+//
+extern EFI_DRIVER_BINDING_PROTOCOL  gRedfishConfigDriverBinding;
+
+extern REDFISH_CONFIG_DRIVER_DATA        gRedfishConfigData;
+extern EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential;
+extern EFI_EVENT                         gEndOfDxeEvent;
+extern EFI_EVENT                         gExitBootServiceEvent;
+
+/**
+  Tests to see if this driver supports a given controller. If a child device is provided,
+  it further tests to see if this driver supports creating a handle for the specified child device.
+
+  This function checks to see if the driver specified by This supports the device specified by
+  ControllerHandle. Drivers will typically use the device path attached to
+  ControllerHandle and/or the services from the bus I/O abstraction attached to
+  ControllerHandle to determine if the driver supports ControllerHandle. This function
+  may be called many times during platform initialization. In order to reduce boot times, the tests
+  performed by this function must be very small, and take as little time as possible to execute. This
+  function must not change the state of any hardware devices, and this function must be aware that the
+  device specified by ControllerHandle may already be managed by the same driver or a
+  different driver. This function must match its calls to AllocatePages() with FreePages(),
+  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+  Because ControllerHandle may have been previously started by the same driver, if a protocol is
+  already in the opened state, then it must not be closed with CloseProtocol(). This is required
+  to guarantee the state of ControllerHandle is not modified by this function.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to test. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For bus drivers, if this parameter is not NULL, then
+                                   the bus driver must determine if the bus controller specified
+                                   by ControllerHandle and the child controller specified
+                                   by RemainingDevicePath are both supported by this
+                                   bus driver.
+
+  @retval EFI_SUCCESS              The device specified by ControllerHandle and
+                                   RemainingDevicePath is supported by the driver specified by This.
+  @retval EFI_ALREADY_STARTED      The device specified by ControllerHandle and
+                                   RemainingDevicePath is already being managed by the driver
+                                   specified by This.
+  @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle and
+                                   RemainingDevicePath is already being managed by a different
+                                   driver or an application that requires exclusive access.
+                                   Currently not implemented.
+  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and
+                                   RemainingDevicePath is not supported by the driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingSupported (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   ControllerHandle,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
+  );
+
+/**
+  Starts a device controller or a bus controller.
+
+  The Start() function is designed to be invoked from the EFI boot service ConnectController().
+  As a result, much of the error checking on the parameters to Start() has been moved into this
+  common boot service. It is legal to call Start() from other locations,
+  but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE.
+  2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
+     EFI_DEVICE_PATH_PROTOCOL.
+  3. Prior to calling Start(), the Supported() function for the driver specified by This must
+     have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to start. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For a bus driver, if this parameter is NULL, then handles
+                                   for all the children of Controller are created by this driver.
+                                   If this parameter is not NULL and the first Device Path Node is
+                                   not the End of Device Path Node, then only the handle for the
+                                   child device specified by the first Device Path Node of
+                                   RemainingDevicePath is created by this driver.
+                                   If the first Device Path Node of RemainingDevicePath is
+                                   the End of Device Path Node, no child handle is created by this
+                                   driver.
+
+  @retval EFI_SUCCESS              The driver is started.
+  @retval EFI_ALREADY_STARTED      The driver was already started.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingStart (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   ControllerHandle,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
+  );
+
+/**
+  Stops a device controller or a bus controller.
+
+  The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
+  As a result, much of the error checking on the parameters to Stop() has been moved
+  into this common boot service. It is legal to call Stop() from other locations,
+  but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
+     same driver's Start() function.
+  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
+     EFI_HANDLE. In addition, all of these handles must have been created in this driver's
+     Start() function, and the Start() function must have called OpenProtocol() on
+     ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
+
+  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle  A handle to the device being stopped. The handle must
+                                support a bus specific I/O protocol for the driver
+                                to use to stop the device.
+  @param[in]  NumberOfChildren  The number of child device handles in ChildHandleBuffer.
+  @param[in]  ChildHandleBuffer An array of child handles to be freed. May be NULL
+                                if NumberOfChildren is 0.
+
+  @retval EFI_SUCCESS           The device was stopped.
+  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a device error.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingStop (
+  IN  EFI_DRIVER_BINDING_PROTOCOL *This,
+  IN  EFI_HANDLE                  ControllerHandle,
+  IN  UINTN                       NumberOfChildren,
+  IN  EFI_HANDLE                  *ChildHandleBuffer OPTIONAL
+  );
+#endif
diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
new file mode 100644
index 0000000000..ff465d9ff3
--- /dev/null
+++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
@@ -0,0 +1,265 @@
+/** @file
+  The common code of EDKII Redfish Configuration Handler driver.
+
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "RedfishConfigHandlerCommon.h"
+
+REDFISH_CONFIG_DRIVER_DATA      gRedfishConfigData; // Only one Redfish service supproted
+                                                    // on platform for the BIOS
+                                                    // Redfish configuration.
+EFI_EVENT  gEndOfDxeEvent = NULL;
+EFI_EVENT  gExitBootServiceEvent = NULL;
+EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential = NULL;
+
+/**
+  Callback function executed when the EndOfDxe event group is signaled.
+
+  @param[in]   Event    Event whose notification function is being invoked.
+  @param[out]  Context  Pointer to the Context buffer.
+
+**/
+VOID
+EFIAPI
+RedfishConfigOnEndOfDxe (
+  IN  EFI_EVENT  Event,
+  OUT VOID       *Context
+  )
+{
+  EFI_STATUS                          Status;
+
+  Status = gCredential->StopService (gCredential, ServiceStopTypeSecureBootDisabled);
+  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
+    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop service on EndOfDxe: %r", Status));
+  }
+
+  //
+  // Close event, so it will not be invoked again.
+  //
+  gBS->CloseEvent (gEndOfDxeEvent);
+  gEndOfDxeEvent = NULL;
+}
+
+/**
+  Callback function executed when the ExitBootService event group is signaled.
+
+  @param[in]   Event    Event whose notification function is being invoked.
+  @param[out]  Context  Pointer to the Context buffer
+
+**/
+VOID
+EFIAPI
+RedfishConfigOnExitBootService (
+  IN  EFI_EVENT  Event,
+  OUT VOID       *Context
+  )
+{
+  EFI_STATUS                          Status;
+
+  Status = gCredential->StopService (gCredential, ServiceStopTypeExitBootService);
+  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
+    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop service on ExitBootService: %r", Status));
+  }
+}
+
+/**
+  Unloads an image.
+
+  @param[in]  ImageHandle       Handle that identifies the image to be unloaded.
+
+  @retval EFI_SUCCESS           The image has been unloaded.
+
+**/
+EFI_STATUS
+RedfishConfigDriverCommonUnload (
+  IN EFI_HANDLE  ImageHandle
+  )
+{
+  if (gEndOfDxeEvent != NULL) {
+    gBS->CloseEvent (gEndOfDxeEvent);
+    gEndOfDxeEvent = NULL;
+  }
+
+  if (gExitBootServiceEvent != NULL) {
+    gBS->CloseEvent (gExitBootServiceEvent);
+    gExitBootServiceEvent = NULL;
+  }
+
+  if (gRedfishConfigData.Event != NULL) {
+    gBS->CloseEvent (gRedfishConfigData.Event);
+    gRedfishConfigData.Event = NULL;
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  This is the common code for Redfish configuration UEFI and DXE driver
+  initialization.
+
+  @param[in]  ImageHandle       The firmware allocated handle for the UEFI image.
+  @param[in]  SystemTable       A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS           The operation completed successfully.
+  @retval Others                An unexpected error occurred.
+**/
+EFI_STATUS
+RedfishConfigCommonInit (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS Status;
+  //
+  // Locate Redfish Credential Protocol to get credential for
+  // accessing to Redfish service.
+  //
+  Status = gBS->LocateProtocol (&gEdkIIRedfishCredentialProtocolGuid, NULL, (VOID **) &gCredential);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_INFO, "%a: No Redfish Credential Protocol is installed on system.", __FUNCTION__));
+    return Status;
+  }
+  //
+  // Create EndOfDxe Event.
+  //
+  Status = gBS->CreateEventEx (
+                  EVT_NOTIFY_SIGNAL,
+                  TPL_CALLBACK,
+                  RedfishConfigOnEndOfDxe,
+                  NULL,
+                  &gEfiEndOfDxeEventGroupGuid,
+                  &gEndOfDxeEvent
+                  );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "%a: Fail to register End Of DXE event.", __FUNCTION__));
+    return Status;
+  }
+  //
+  // Create Exit Boot Service event.
+  //
+  Status = gBS->CreateEventEx (
+                  EVT_NOTIFY_SIGNAL,
+                  TPL_CALLBACK,
+                  RedfishConfigOnExitBootService,
+                  NULL,
+                  &gEfiEventExitBootServicesGuid,
+                  &gExitBootServiceEvent
+                  );
+  if (EFI_ERROR (Status)) {
+    gBS->CloseEvent (gEndOfDxeEvent);
+    gEndOfDxeEvent = NULL;
+    DEBUG ((DEBUG_ERROR, "%a: Fail to register Exit Boot Service event.", __FUNCTION__));
+    return Status;
+  }
+  return EFI_SUCCESS;
+}
+/**
+  This is the common code to stop EDK2 Redfish feature driver.
+
+  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
+                         stopped.
+  @retval Others         An unexpected error occurred.
+**/
+EFI_STATUS
+RedfishConfigCommonStop (
+  VOID
+)
+{
+  EFI_STATUS   Status;
+  EFI_HANDLE  *HandleBuffer;
+  UINTN        NumberOfHandles;
+  UINTN        Index;
+  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
+
+  Status = gBS->LocateHandleBuffer (
+                  ByProtocol,
+                  &gEdkIIRedfishConfigHandlerProtocolGuid,
+                  NULL,
+                  &NumberOfHandles,
+                  &HandleBuffer
+                  );
+  if (EFI_ERROR (Status) && Status != EFI_NOT_FOUND) {
+    return Status;
+  }
+
+  Status = EFI_SUCCESS;
+  for (Index = 0; Index < NumberOfHandles; Index++) {
+    Status = gBS->HandleProtocol (
+                     HandleBuffer[Index],
+                     &gEdkIIRedfishConfigHandlerProtocolGuid,
+                     (VOID**) &ConfigHandler
+                     );
+    ASSERT_EFI_ERROR (Status);
+
+    Status = ConfigHandler->Stop (ConfigHandler);
+    if (EFI_ERROR (Status) && Status != EFI_UNSUPPORTED) {
+      DEBUG ((DEBUG_ERROR, "ERROR: Failed to stop Redfish config handler %p.\n", ConfigHandler));
+      break;
+    }
+  }
+  return Status;
+}
+/**
+  Callback function executed when a Redfish Config Handler Protocol is installed
+  by EDK2 Redfish Feature Drivers.
+
+**/
+VOID
+RedfishConfigHandlerInitialization (
+  VOID
+  )
+{
+  EFI_STATUS                            Status;
+  EFI_HANDLE                            *HandleBuffer;
+  UINTN                                 NumberOfHandles;
+  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
+  UINTN                                 Index;
+  UINT32                                Id;
+
+  Status = gBS->LocateHandleBuffer (
+                  ByProtocol,
+                  &gEdkIIRedfishConfigHandlerProtocolGuid,
+                  NULL,
+                  &NumberOfHandles,
+                  &HandleBuffer
+                  );
+  if (EFI_ERROR (Status)) {
+    return;
+  }
+
+  for (Index = 0; Index < NumberOfHandles; Index++) {
+    Status = gBS->HandleProtocol (
+                    HandleBuffer [Index],
+                    &gEfiCallerIdGuid,
+                    (VOID **) &Id
+                    );
+    if (!EFI_ERROR (Status)) {
+      continue;
+    }
+
+    Status = gBS->HandleProtocol (
+                     HandleBuffer [Index],
+                     &gEdkIIRedfishConfigHandlerProtocolGuid,
+                     (VOID**) &ConfigHandler
+                     );
+    ASSERT_EFI_ERROR (Status);
+    Status = ConfigHandler->Init (ConfigHandler, &gRedfishConfigData.RedfishServiceInfo);
+    if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
+      DEBUG ((DEBUG_ERROR, "ERROR: Failed to init Redfish config handler %p.\n", ConfigHandler));
+    }
+    //
+    // Install caller ID to indicate Redfish Configure Handler is initialized.
+    //
+    Status = gBS->InstallProtocolInterface (
+                  &HandleBuffer [Index],
+                  &gEfiCallerIdGuid,
+                  EFI_NATIVE_INTERFACE,
+                  (VOID *)&gRedfishConfigData.CallerId
+                  );
+    ASSERT_EFI_ERROR (Status);
+  }
+}
diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
new file mode 100644
index 0000000000..51378dff4f
--- /dev/null
+++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
@@ -0,0 +1,587 @@
+/** @file
+  The UEFI driver model driver which is responsible for locating the
+  Redfish service through Redfish host interface and executing EDKII
+  Redfish feature drivers.
+
+  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "RedfishConfigHandlerDriver.h"
+
+EFI_EVENT  gEfiRedfishDiscoverProtocolEvent = NULL;
+
+//
+// Variables for using RFI Redfish Discover Protocol
+//
+VOID                             *gEfiRedfishDiscoverRegistration;
+EFI_HANDLE                       gEfiRedfishDiscoverControllerHandle = NULL;
+EFI_REDFISH_DISCOVER_PROTOCOL    *gEfiRedfishDiscoverProtocol = NULL;
+BOOLEAN                          gRedfishDiscoverActivated = FALSE;
+BOOLEAN                          gRedfishServiceDiscovered = FALSE;
+//
+// Network interfaces discovered by EFI Redfish Discover Protocol.
+//
+UINTN                                   gNumberOfNetworkInterfaces;
+EFI_REDFISH_DISCOVER_NETWORK_INTERFACE  *gNetworkInterfaceInstances = NULL;
+EFI_REDFISH_DISCOVERED_TOKEN            *gRedfishDiscoveredToken = NULL;
+
+///
+/// Driver Binding Protocol instance
+///
+EFI_DRIVER_BINDING_PROTOCOL gRedfishConfigDriverBinding = {
+  RedfishConfigDriverBindingSupported,
+  RedfishConfigDriverBindingStart,
+  RedfishConfigDriverBindingStop,
+  REDFISH_CONFIG_VERSION,
+  NULL,
+  NULL
+};
+
+/**
+  Stop acquiring Redfish service.
+
+**/
+VOID
+RedfishConfigStopRedfishDiscovery (
+  VOID
+)
+{
+  if (gRedfishDiscoverActivated) {
+    //
+    // No more EFI Discover Protocol.
+    //
+    if (gEfiRedfishDiscoverProtocolEvent != NULL) {
+      gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
+    }
+    //
+    // Stop Redfish service discovery.
+    //
+    gEfiRedfishDiscoverProtocol->AbortAcquireRedfishService (
+                                   gEfiRedfishDiscoverProtocol,
+                                   gNetworkInterfaceInstances
+                                   );
+    gEfiRedfishDiscoverControllerHandle = NULL;
+    gEfiRedfishDiscoverProtocol = NULL;
+    gRedfishDiscoverActivated = FALSE;
+    gRedfishServiceDiscovered = FALSE;
+  }
+}
+
+/**
+  Callback function executed when a Redfish Config Handler Protocol is installed.
+
+  @param[in]  Event    Event whose notification function is being invoked.
+  @param[in]  Context  Pointer to the REDFISH_CONFIG_DRIVER_DATA buffer.
+
+**/
+VOID
+EFIAPI
+RedfishConfigHandlerInstalledCallback (
+  IN EFI_EVENT  Event,
+  IN VOID       *Context
+  )
+{
+  if (!gRedfishDiscoverActivated) {
+    //
+    // No Redfish service is discovered yet.
+    //
+    return;
+  }
+
+  RedfishConfigHandlerInitialization ();
+}
+
+/**
+  Tests to see if this driver supports a given controller. If a child device is provided,
+  it further tests to see if this driver supports creating a handle for the specified child device.
+
+  This function checks to see if the driver specified by This supports the device specified by
+  ControllerHandle. Drivers will typically use the device path attached to
+  ControllerHandle and/or the services from the bus I/O abstraction attached to
+  ControllerHandle to determine if the driver supports ControllerHandle. This function
+  may be called many times during platform initialization. In order to reduce boot times, the tests
+  performed by this function must be very small, and take as little time as possible to execute. This
+  function must not change the state of any hardware devices, and this function must be aware that the
+  device specified by ControllerHandle may already be managed by the same driver or a
+  different driver. This function must match its calls to AllocatePages() with FreePages(),
+  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+  Because ControllerHandle may have been previously started by the same driver, if a protocol is
+  already in the opened state, then it must not be closed with CloseProtocol(). This is required
+  to guarantee the state of ControllerHandle is not modified by this function.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to test. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For bus drivers, if this parameter is not NULL, then
+                                   the bus driver must determine if the bus controller specified
+                                   by ControllerHandle and the child controller specified
+                                   by RemainingDevicePath are both supported by this
+                                   bus driver.
+
+  @retval EFI_SUCCESS              The device specified by ControllerHandle and
+                                   RemainingDevicePath is supported by the driver specified by This.
+  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and
+                                   RemainingDevicePath is not supported by the driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingSupported (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   ControllerHandle,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
+  )
+{
+  EFI_REST_EX_PROTOCOL             *RestEx;
+  EFI_STATUS                       Status;
+  EFI_HANDLE                       ChildHandle;
+
+  ChildHandle = NULL;
+
+  //
+  // Check if REST EX is ready. This just makes sure
+  // the network stack is brought up.
+  //
+  Status = NetLibCreateServiceChild (
+             ControllerHandle,
+             This->ImageHandle,
+             &gEfiRestExServiceBindingProtocolGuid,
+             &ChildHandle
+             );
+  if (EFI_ERROR (Status)) {
+    return EFI_UNSUPPORTED;
+  }
+
+  //
+  // Test if REST EX protocol is ready.
+  //
+  Status = gBS->OpenProtocol(
+                  ChildHandle,
+                  &gEfiRestExProtocolGuid,
+                  (VOID**) &RestEx,
+                  This->DriverBindingHandle,
+                  ControllerHandle,
+                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                  );
+  if (EFI_ERROR (Status)) {
+    Status = EFI_UNSUPPORTED;
+  }
+  NetLibDestroyServiceChild (
+    ControllerHandle,
+    This->ImageHandle,
+    &gEfiRestExServiceBindingProtocolGuid,
+    ChildHandle
+    );
+  return Status;
+}
+
+/**
+  Starts a device controller or a bus controller.
+
+  The Start() function is designed to be invoked from the EFI boot service ConnectController().
+  As a result, much of the error checking on the parameters to Start() has been moved into this
+  common boot service. It is legal to call Start() from other locations,
+  but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE.
+  2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
+     EFI_DEVICE_PATH_PROTOCOL.
+  3. Prior to calling Start(), the Supported() function for the driver specified by This must
+     have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to start. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For a bus driver, if this parameter is NULL, then handles
+                                   for all the children of Controller are created by this driver.
+                                   If this parameter is not NULL and the first Device Path Node is
+                                   not the End of Device Path Node, then only the handle for the
+                                   child device specified by the first Device Path Node of
+                                   RemainingDevicePath is created by this driver.
+                                   If the first Device Path Node of RemainingDevicePath is
+                                   the End of Device Path Node, no child handle is created by this
+                                   driver.
+
+  @retval EFI_SUCCESS              The driver is started.
+  @retval EFI_ALREADY_STARTED      The driver was already started.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingStart (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   ControllerHandle,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
+  )
+{
+  VOID *ConfigHandlerRegistration;
+
+  if (gRedfishConfigData.Event != NULL) {
+    return EFI_ALREADY_STARTED;
+  }
+
+  gRedfishConfigData.Event = EfiCreateProtocolNotifyEvent (
+                                &gEdkIIRedfishConfigHandlerProtocolGuid,
+                                TPL_CALLBACK,
+                                RedfishConfigHandlerInstalledCallback,
+                                (VOID *)&gRedfishConfigData,
+                                &ConfigHandlerRegistration
+                                );
+  return EFI_SUCCESS;
+}
+
+/**
+  Stops a device controller or a bus controller.
+
+  The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
+  As a result, much of the error checking on the parameters to Stop() has been moved
+  into this common boot service. It is legal to call Stop() from other locations,
+  but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
+     same driver's Start() function.
+  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
+     EFI_HANDLE. In addition, all of these handles must have been created in this driver's
+     Start() function, and the Start() function must have called OpenProtocol() on
+     ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
+
+  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle  A handle to the device being stopped. The handle must
+                                support a bus specific I/O protocol for the driver
+                                to use to stop the device.
+  @param[in]  NumberOfChildren  The number of child device handles in ChildHandleBuffer.
+  @param[in]  ChildHandleBuffer An array of child handles to be freed. May be NULL
+                                if NumberOfChildren is 0.
+
+  @retval EFI_SUCCESS           The device was stopped.
+  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a device error.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingStop (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   ControllerHandle,
+  IN UINTN                        NumberOfChildren,
+  IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL
+  )
+{
+  EFI_STATUS  Status;
+
+  if (ControllerHandle == gEfiRedfishDiscoverControllerHandle) {
+    RedfishConfigStopRedfishDiscovery ();
+  }
+  gBS->CloseProtocol (
+         ControllerHandle,
+         &gEfiRedfishDiscoverProtocolGuid,
+         gRedfishConfigData.Image,
+         gRedfishConfigData.Image
+         );
+
+  Status = RedfishConfigCommonStop ();
+  if (EFI_ERROR (Status)) {
+    return EFI_DEVICE_ERROR;
+  }
+
+  if (gRedfishConfigData.Event != NULL) {
+    gBS->CloseEvent (gRedfishConfigData.Event);
+    gRedfishConfigData.Event = NULL;
+  }
+  return EFI_SUCCESS;
+}
+
+/**
+  Callback function when Redfish service is discovered.
+
+  @param[in]   Event    Event whose notification function is being invoked.
+  @param[out]  Context  Pointer to the Context buffer
+
+**/
+VOID
+EFIAPI
+RedfishServiceDiscoveredCallback (
+  IN  EFI_EVENT  Event,
+  OUT VOID       *Context
+  )
+{
+  EFI_REDFISH_DISCOVERED_TOKEN *RedfishDiscoveredToken;
+  EFI_REDFISH_DISCOVERED_INSTANCE *RedfishInstance;
+
+  if (gRedfishServiceDiscovered) {
+    //
+    // Only support one Redfish service on platform.
+    //
+    return;
+  }
+
+  RedfishDiscoveredToken = (EFI_REDFISH_DISCOVERED_TOKEN *)Context;
+  RedfishInstance = RedfishDiscoveredToken->DiscoverList.RedfishInstances;
+  //
+  // Only pick up the first found Redfish service.
+  //
+  if (RedfishInstance->Status == EFI_SUCCESS) {
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceRestExHandle = RedfishInstance->Information.RedfishRestExHandle;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceVersion      = RedfishInstance->Information.RedfishVersion;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceLocation     = RedfishInstance->Information.Location;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUuid         = RedfishInstance->Information.Uuid;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOs           = RedfishInstance->Information.Os;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOsVersion    = RedfishInstance->Information.OsVersion;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProduct      = RedfishInstance->Information.Product;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProductVer   = RedfishInstance->Information.ProductVer;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUseHttps     = RedfishInstance->Information.UseHttps;
+    gRedfishServiceDiscovered = TRUE;
+  }
+
+  //
+  // Invoke RedfishConfigHandlerInstalledCallback to execute
+  // the initialization of Redfish Configure Handler instance.
+  //
+  RedfishConfigHandlerInstalledCallback (gRedfishConfigData.Event, &gRedfishConfigData);
+}
+
+/**
+  Callback function executed when the EFI_REDFISH_DISCOVER_PROTOCOL
+  protocol interface is installed.
+
+  @param[in]   Event    Event whose notification function is being invoked.
+  @param[out]  Context  Pointer to the Context buffer
+
+**/
+VOID
+EFIAPI
+RedfishDiscoverProtocolInstalled (
+  IN  EFI_EVENT  Event,
+  OUT VOID       *Context
+  )
+{
+  EFI_STATUS Status;
+  UINTN BufferSize;
+  EFI_HANDLE HandleBuffer;
+  UINTN NetworkInterfaceIndex;
+  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE *ThisNetworkInterface;
+  EFI_REDFISH_DISCOVERED_TOKEN           *ThisRedfishDiscoveredToken;
+
+  DEBUG((DEBUG_INFO, "%a: New network interface is installed on system by EFI Redfish discover driver.\n", __FUNCTION__));
+
+  BufferSize = sizeof (EFI_HANDLE);
+  Status = gBS->LocateHandle (
+                  ByRegisterNotify,
+                  NULL,
+                  gEfiRedfishDiscoverRegistration,
+                  &BufferSize,
+                  &HandleBuffer
+                );
+  if (EFI_ERROR (Status)) {
+    DEBUG((DEBUG_ERROR, "%a: Can't locate handle with EFI_REDFISH_DISCOVER_PROTOCOL installed.\n", __FUNCTION__));
+  }
+  gRedfishDiscoverActivated = TRUE;
+  if (gEfiRedfishDiscoverProtocol == NULL) {
+     gEfiRedfishDiscoverControllerHandle = HandleBuffer;
+    //
+    // First time to open EFI_REDFISH_DISCOVER_PROTOCOL.
+    //
+    Status = gBS->OpenProtocol(
+                      gEfiRedfishDiscoverControllerHandle,
+                      &gEfiRedfishDiscoverProtocolGuid,
+                      (VOID **)&gEfiRedfishDiscoverProtocol,
+                      gRedfishConfigData.Image,
+                      gRedfishConfigData.Image,
+                      EFI_OPEN_PROTOCOL_BY_DRIVER
+                    );
+    if (EFI_ERROR (Status)) {
+      gEfiRedfishDiscoverProtocol = NULL;
+      gRedfishDiscoverActivated = FALSE;
+      DEBUG((DEBUG_ERROR, "%a: Can't locate EFI_REDFISH_DISCOVER_PROTOCOL.\n", __FUNCTION__));
+      return;
+    }
+  }
+  //
+  // Check the new found network interface.
+  //
+  if (gNetworkInterfaceInstances != NULL) {
+    FreePool (gNetworkInterfaceInstances);
+  }
+  Status = gEfiRedfishDiscoverProtocol->GetNetworkInterfaceList(
+                                          gEfiRedfishDiscoverProtocol,
+                                          gRedfishConfigData.Image,
+                                          &gNumberOfNetworkInterfaces,
+                                          &gNetworkInterfaceInstances
+                                          );
+  if (EFI_ERROR (Status) || gNumberOfNetworkInterfaces == 0) {
+    DEBUG((DEBUG_ERROR, "%a: No network interfaces found on the handle.\n", __FUNCTION__));
+    return;
+  }
+
+  gRedfishDiscoveredToken = AllocateZeroPool (gNumberOfNetworkInterfaces * sizeof (EFI_REDFISH_DISCOVERED_TOKEN));
+  if (gRedfishDiscoveredToken == NULL) {
+    DEBUG((DEBUG_ERROR, "%a: Not enough memory for EFI_REDFISH_DISCOVERED_TOKEN.\n", __FUNCTION__));
+    return;
+  }
+
+  ThisNetworkInterface = gNetworkInterfaceInstances;
+  ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
+  //
+  // Loop to discover Redfish service on each network interface.
+  //
+  for (NetworkInterfaceIndex = 0; NetworkInterfaceIndex < gNumberOfNetworkInterfaces; NetworkInterfaceIndex ++) {
+    //
+    // Initial this Redfish Discovered Token
+    //
+    Status = gBS->CreateEvent (
+                    EVT_NOTIFY_SIGNAL,
+                    TPL_CALLBACK,
+                    RedfishServiceDiscoveredCallback,
+                    (VOID *)ThisRedfishDiscoveredToken,
+                    &ThisRedfishDiscoveredToken->Event
+                  );
+    if (EFI_ERROR (Status)) {
+      DEBUG((DEBUG_ERROR, "%a: Failed to create event for Redfish discovered token.\n", __FUNCTION__));
+      goto ErrorReturn;
+    }
+    ThisRedfishDiscoveredToken->Signature = REDFISH_DISCOVER_TOKEN_SIGNATURE;
+    ThisRedfishDiscoveredToken->DiscoverList.NumberOfServiceFound = 0;
+    ThisRedfishDiscoveredToken->DiscoverList.RedfishInstances = NULL;
+    //
+    // Acquire for Redfish service which is reported by
+    // Redfish Host Interface.
+    //
+    Status = gEfiRedfishDiscoverProtocol->AcquireRedfishService(
+                                             gEfiRedfishDiscoverProtocol,
+                                             gRedfishConfigData.Image,
+                                             ThisNetworkInterface,
+                                             EFI_REDFISH_DISCOVER_HOST_INTERFACE,
+                                             ThisRedfishDiscoveredToken
+                                             );
+    ThisNetworkInterface ++;
+    ThisRedfishDiscoveredToken ++;
+  }
+  if (EFI_ERROR (Status)) {
+    DEBUG((DEBUG_ERROR, "%a: Acquire Redfish service fail.\n", __FUNCTION__));
+    goto ErrorReturn;
+  }
+  return;
+
+ErrorReturn:
+  if (gRedfishDiscoveredToken != NULL) {
+    FreePool(gRedfishDiscoveredToken);
+  }
+}
+
+/**
+  Unloads an image.
+
+  @param[in]  ImageHandle       Handle that identifies the image to be unloaded.
+
+  @retval EFI_SUCCESS           The image has been unloaded.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigHandlerDriverUnload (
+  IN EFI_HANDLE  ImageHandle
+  )
+{
+  EFI_REDFISH_DISCOVERED_TOKEN *ThisRedfishDiscoveredToken;
+  UINTN NumberOfNetworkInterfacesIndex;
+
+  RedfishConfigDriverCommonUnload (ImageHandle);
+
+  RedfishConfigStopRedfishDiscovery ();
+  if (gRedfishDiscoveredToken != NULL) {
+    ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
+    for (NumberOfNetworkInterfacesIndex = 0; NumberOfNetworkInterfacesIndex < gNumberOfNetworkInterfaces; NumberOfNetworkInterfacesIndex ++) {
+      if (ThisRedfishDiscoveredToken->Event != NULL) {
+        gBS->CloseEvent (ThisRedfishDiscoveredToken->Event);
+      }
+      FreePool (ThisRedfishDiscoveredToken);
+      ThisRedfishDiscoveredToken ++;
+    }
+    gRedfishDiscoveredToken = NULL;
+  }
+  return EFI_SUCCESS;
+}
+
+/**
+  This is the declaration of an EFI image entry point. This entry point is
+  the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
+  both device drivers and bus drivers.
+
+  @param[in]  ImageHandle       The firmware allocated handle for the UEFI image.
+  @param[in]  SystemTable       A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS           The operation completed successfully.
+  @retval Others                An unexpected error occurred.
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigHandlerDriverEntryPoint (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS    Status;
+
+  ZeroMem ((VOID *)&gRedfishConfigData, sizeof (REDFISH_CONFIG_DRIVER_DATA));
+  gRedfishConfigData.Image = ImageHandle;
+  //
+  // Register event for EFI_REDFISH_DISCOVER_PROTOCOL protocol install
+  // notification.
+  //
+  Status = gBS->CreateEventEx (
+                  EVT_NOTIFY_SIGNAL,
+                  TPL_CALLBACK,
+                  RedfishDiscoverProtocolInstalled,
+                  NULL,
+                  &gEfiRedfishDiscoverProtocolGuid,
+                  &gEfiRedfishDiscoverProtocolEvent
+                  );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "%a: Fail to create event for the installation of EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
+    return Status;
+  }
+  Status = gBS->RegisterProtocolNotify (
+                  &gEfiRedfishDiscoverProtocolGuid,
+                  gEfiRedfishDiscoverProtocolEvent,
+                  &gEfiRedfishDiscoverRegistration
+                );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "%a: Fail to register event for the installation of EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
+    return Status;
+  }
+
+  Status = RedfishConfigCommonInit (ImageHandle, SystemTable);
+  if (EFI_ERROR (Status)) {
+    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
+    gEfiRedfishDiscoverProtocolEvent = NULL;
+    return Status;
+  }
+
+  //
+  // Install UEFI Driver Model protocol(s).
+  //
+  Status = EfiLibInstallDriverBinding (
+             ImageHandle,
+             SystemTable,
+             &gRedfishConfigDriverBinding,
+             ImageHandle
+             );
+  if (EFI_ERROR (Status)) {
+    gBS->CloseEvent (gEndOfDxeEvent);
+    gEndOfDxeEvent = NULL;
+    gBS->CloseEvent (gExitBootServiceEvent);
+    gExitBootServiceEvent = NULL;
+    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
+    gEfiRedfishDiscoverProtocolEvent = NULL;
+    DEBUG ((DEBUG_ERROR, "%a: Fail to install EFI Binding Protocol of EFI Redfish Config driver.", __FUNCTION__));
+    return Status;
+  }
+  return Status;
+}
+
-- 
2.17.1



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Abner: 
  This is a new feature. Can you submit one BZ for it?

Thanks
Liming
> -----邮件原件-----
> 发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Abner Chang
> 发送时间: 2021年3月26日 13:55
> 收件人: devel@edk2.groups.io
> 抄送: Nickle Wang <nickle.wang@hpe.com>
> 主题: [edk2-devel] [PATCH] RedfishPkg/RedfishConfigHandler: EDKII
> RedfishConfigHandler Protocol
> 
> The driver is used to manage EDK2 Redfish Configuration Handler
> Protocol installed by EDK2 Redfish feature drivers.
> This is the EDK2 Redfish client driver written based on the EDK2
> Redfish foundation to initialize EDK2 Redfish feature drivers.
> 
> EDK2 Redfish feature drivers are used to provision/consume/update
> the firmware owns Redfish properties during system power on
> initialization.
> 
> RedfishConfigHandlerCommon.c has the common code for the driver
> instances used in different EDK2 boot phases or used by different
> driver models in the future contribution.
> 
> Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
> Signed-off-by: Siyuan Fu <siyuan.fu@intel.com>
> Signed-off-by: Fan Wang <fan.wang@intel.com>
> Signed-off-by: Abner Chang <abner.chang@hpe.com>
> 
> Cc: Nickle Wang <nickle.wang@hpe.com>
> ---
>  RedfishPkg/RedfishComponents.dsc.inc          |   3 +-
>  RedfishPkg/Redfish.fdf.inc                    |   3 +-
>  .../RedfishConfigHandlerDriver.inf            |  60 ++
>  .../RedfishConfigHandlerCommon.h              | 101 +++
>  .../RedfishConfigHandlerDriver.h              | 159 +++++
>  .../RedfishConfigHandlerCommon.c              | 265 ++++++++
>  .../RedfishConfigHandlerDriver.c              | 587
> ++++++++++++++++++
>  7 files changed, 1176 insertions(+), 2 deletions(-)
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> 
> diff --git a/RedfishPkg/RedfishComponents.dsc.inc
> b/RedfishPkg/RedfishComponents.dsc.inc
> index 08f1d3bc32..d0116f065c 100644
> --- a/RedfishPkg/RedfishComponents.dsc.inc
> +++ b/RedfishPkg/RedfishComponents.dsc.inc
> @@ -6,7 +6,7 @@
>  # of EDKII Redfish drivers according to the value of flags described in
>  # "RedfishDefines.dsc.inc".
>  #
> -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
>  #
>  #    SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -17,4 +17,5 @@
>    RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
>    RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
>    RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
> +  RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
>  !endif
> diff --git a/RedfishPkg/Redfish.fdf.inc b/RedfishPkg/Redfish.fdf.inc
> index a64fd119a9..9673246b3f 100644
> --- a/RedfishPkg/Redfish.fdf.inc
> +++ b/RedfishPkg/Redfish.fdf.inc
> @@ -5,7 +5,7 @@
>  # by using "!include RedfishPkg/RedfisLibs.fdf.inc" to specify the module
> instances
>  # to be built in the firmware volume.
>  #
> -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
>  #
>  #    SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -15,4 +15,5 @@
>    INF RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
>    INF RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
>    INF RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
> +  INF RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
>  !endif
> diff --git
a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> new file mode 100644
> index 0000000000..def91c7531
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> @@ -0,0 +1,60 @@
> +## @file
> +#  INF file for the UEFI driver model Redfish Configuration Handler
> +#  Driver.
> +#
> +#  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> +#  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +#
> +#  SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +##
> +
> +[Defines]
> +  INF_VERSION               = 0x0001000b
> +  BASE_NAME                 = RedfishConfigHandlerDriver
> +  FILE_GUID                 =
> 6e881000-5749-11e8-9bf0-8cdcd426c973
> +  MODULE_TYPE               = UEFI_DRIVER
> +  VERSION_STRING            = 1.0
> +  ENTRY_POINT               = RedfishConfigHandlerDriverEntryPoint
> +  UNLOAD_IMAGE              = RedfishConfigHandlerDriverUnload
> +
> +#
> +#  VALID_ARCHITECTURES      = IA32 X64 ARM AARCH64 RISCV64
> +#
> +
> +[Packages]
> +  MdePkg/MdePkg.dec
> +  MdeModulePkg/MdeModulePkg.dec
> +  NetworkPkg/NetworkPkg.dec
> +  RedfishPkg/RedfishPkg.dec
> +
> +[Sources]
> +  RedfishConfigHandlerDriver.h
> +  RedfishConfigHandlerDriver.c
> +  RedfishConfigHandlerCommon.h
> +  RedfishConfigHandlerCommon.c
> +
> +[LibraryClasses]
> +  BaseLib
> +  BaseMemoryLib
> +  DebugLib
> +  UefiLib
> +  MemoryAllocationLib
> +  NetLib
> +  UefiBootServicesTableLib
> +  UefiDriverEntryPoint
> +
> +[Protocols]
> +  gEfiRedfishDiscoverProtocolGuid         ## CONSUMES
> +  gEfiRestExServiceBindingProtocolGuid
> +  gEfiRestExProtocolGuid                  ## CONSUMES
> +  gEdkIIRedfishCredentialProtocolGuid     ## CONSUMES
> +  gEdkIIRedfishConfigHandlerProtocolGuid  ## CONSUMES
> +
> +[Guids]
> +  gEfiEventExitBootServicesGuid           ## CONSUMES ## Event
> +  gEfiEndOfDxeEventGroupGuid              ## CONSUMES ## Event
> +
> +[Depex]
> +  TRUE
> +
> diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> new file mode 100644
> index 0000000000..5e46c42219
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> @@ -0,0 +1,101 @@
> +/** @file
> +  Common Header file for Redfish Configuration Handler UEFI driver
> +  and DXE driver.
> +
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#ifndef EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
> +#define EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
> +
> +#include <Uefi.h>
> +
> +//
> +// Libraries
> +//
> +#include <Library/BaseLib.h>
> +#include <Library/BaseMemoryLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/MemoryAllocationLib.h>
> +#include <Library/NetLib.h>
> +#include <Library/UefiBootServicesTableLib.h>
> +#include <Library/UefiDriverEntryPoint.h>
> +#include <Library/UefiLib.h>
> +
> +//
> +// Consumed Protocols
> +//
> +#include <Protocol/EdkIIRedfishCredential.h>
> +#include <Protocol/EdkIIRedfishConfigHandler.h>
> +
> +//
> +// Driver Version
> +//
> +#define REDFISH_CONFIG_VERSION  0x00000001
> +
> +///
> +///  Internal structure used by Redfish Config DXE driver.
> +///
> +typedef struct {
> +  UINT32        CallerId;  ///< Caller ID used to indicate Redfish Config
> Handler
> +                           ///< has been initiated
> +  EFI_HANDLE    Image;     ///< Image handle of Redfish Config Driver
> +  EFI_EVENT     Event;     ///< Event for the notification of
> EFI_REDFISH_CONFIG_HANDLER_PROTOCOL
> +  REDFISH_CONFIG_SERVICE_INFORMATION RedfishServiceInfo; ///
> Redfish Service information discovered
> +} REDFISH_CONFIG_DRIVER_DATA;
> +
> +/**
> +  Common code of unloading image for both UEFI/DXE Redfish Configuration
> drivers.
> +
> +  @param[in]  ImageHandle       Handle that identifies the image to
> be unloaded.
> +
> +  @retval EFI_SUCCESS           The image has been unloaded.
> +
> +**/
> +EFI_STATUS
> +RedfishConfigDriverCommonUnload (
> +  IN EFI_HANDLE  ImageHandle
> +  );
> +
> +/**
> +  This is the common code for Redfish configuration UEFI and DXE driver
> +  initialization.
> +
> +  @param[in]  ImageHandle       The firmware allocated handle for
> the UEFI image.
> +  @param[in]  SystemTable       A pointer to the EFI System Table.
> +
> +  @retval EFI_SUCCESS           The operation completed successfully.
> +  @retval Others                An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonInit (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  );
> +
> +/**
> +  This is the common code to stop EDK2 Redfish feature driver.
> +
> +  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
> +                         stopped.
> +  @retval Others         An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonStop (
> +  VOID
> +);
> +
> +/**
> +  Callback function executed when a Redfish Config Handler Protocol is
> installed
> +  by EDK2 Redfish Feature Drivers.
> +
> +**/
> +VOID
> +RedfishConfigHandlerInitialization (
> +  VOID
> +  );
> +
> +#endif
> diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> new file mode 100644
> index 0000000000..58202c41e2
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> @@ -0,0 +1,159 @@
> +/** @file
> +  Header file of Redfish Configuration Handler UEFI driver.
> +
> +  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#ifndef EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
> +#define EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
> +
> +#include "RedfishConfigHandlerCommon.h"
> +
> +//
> +// UEFI Driver Model Protocols
> +//
> +
> +#include <Protocol/DriverBinding.h>
> +#include <Protocol/RedfishDiscover.h>
> +#include <Protocol/RestEx.h>
> +
> +//
> +// Protocol instances
> +//
> +extern EFI_DRIVER_BINDING_PROTOCOL  gRedfishConfigDriverBinding;
> +
> +extern REDFISH_CONFIG_DRIVER_DATA        gRedfishConfigData;
> +extern EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential;
> +extern EFI_EVENT                         gEndOfDxeEvent;
> +extern EFI_EVENT                         gExitBootServiceEvent;
> +
> +/**
> +  Tests to see if this driver supports a given controller. If a child
device is
> provided,
> +  it further tests to see if this driver supports creating a handle for
the
> specified child device.
> +
> +  This function checks to see if the driver specified by This supports
the
> device specified by
> +  ControllerHandle. Drivers will typically use the device path attached
to
> +  ControllerHandle and/or the services from the bus I/O abstraction
> attached to
> +  ControllerHandle to determine if the driver supports ControllerHandle.
> This function
> +  may be called many times during platform initialization. In order to
reduce
> boot times, the tests
> +  performed by this function must be very small, and take as little time
as
> possible to execute. This
> +  function must not change the state of any hardware devices, and this
> function must be aware that the
> +  device specified by ControllerHandle may already be managed by the
> same driver or a
> +  different driver. This function must match its calls to AllocatePages()
with
> FreePages(),
> +  AllocatePool() with FreePool(), and OpenProtocol() with
CloseProtocol().
> +  Because ControllerHandle may have been previously started by the same
> driver, if a protocol is
> +  already in the opened state, then it must not be closed with
> CloseProtocol(). This is required
> +  to guarantee the state of ControllerHandle is not modified by this
> function.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to test.
> This handle
> +                                   must support a protocol
> interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion
> of a device path.  This
> +                                   parameter is ignored by device
> drivers, and is optional for bus
> +                                   drivers. For bus drivers, if this
> parameter is not NULL, then
> +                                   the bus driver must determine if
> the bus controller specified
> +                                   by ControllerHandle and the
> child controller specified
> +                                   by RemainingDevicePath are
> both supported by this
> +                                   bus driver.
> +
> +  @retval EFI_SUCCESS              The device specified by
> ControllerHandle and
> +                                   RemainingDevicePath is
> supported by the driver specified by This.
> +  @retval EFI_ALREADY_STARTED      The device specified by
> ControllerHandle and
> +                                   RemainingDevicePath is already
> being managed by the driver
> +                                   specified by This.
> +  @retval EFI_ACCESS_DENIED        The device specified by
> ControllerHandle and
> +                                   RemainingDevicePath is already
> being managed by a different
> +                                   driver or an application that
> requires exclusive access.
> +                                   Currently not implemented.
> +  @retval EFI_UNSUPPORTED          The device specified by
> ControllerHandle and
> +                                   RemainingDevicePath is not
> supported by the driver specified by This.
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingSupported (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  );
> +
> +/**
> +  Starts a device controller or a bus controller.
> +
> +  The Start() function is designed to be invoked from the EFI boot
service
> ConnectController().
> +  As a result, much of the error checking on the parameters to Start()
has
> been moved into this
> +  common boot service. It is legal to call Start() from other locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE.
> +  2. If RemainingDevicePath is not NULL, then it must be a pointer to a
> naturally aligned
> +     EFI_DEVICE_PATH_PROTOCOL.
> +  3. Prior to calling Start(), the Supported() function for the driver
specified
> by This must
> +     have been called with the same calling parameters, and Supported()
> must have returned EFI_SUCCESS.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to start.
> This handle
> +                                   must support a protocol
> interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion
> of a device path.  This
> +                                   parameter is ignored by device
> drivers, and is optional for bus
> +                                   drivers. For a bus driver, if this
> parameter is NULL, then handles
> +                                   for all the children of Controller
> are created by this driver.
> +                                   If this parameter is not NULL
> and the first Device Path Node is
> +                                   not the End of Device Path Node,
> then only the handle for the
> +                                   child device specified by the first
> Device Path Node of
> +                                   RemainingDevicePath is created
> by this driver.
> +                                   If the first Device Path Node of
> RemainingDevicePath is
> +                                   the End of Device Path Node, no
> child handle is created by this
> +                                   driver.
> +
> +  @retval EFI_SUCCESS              The driver is started.
> +  @retval EFI_ALREADY_STARTED      The driver was already started.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStart (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  );
> +
> +/**
> +  Stops a device controller or a bus controller.
> +
> +  The Stop() function is designed to be invoked from the EFI boot service
> DisconnectController().
> +  As a result, much of the error checking on the parameters to Stop() has
> been moved
> +  into this common boot service. It is legal to call Stop() from other
locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE that was used on a
> previous call to this
> +     same driver's Start() function.
> +  2. The first NumberOfChildren handles of ChildHandleBuffer must all be
a
> valid
> +     EFI_HANDLE. In addition, all of these handles must have been created
> in this driver's
> +     Start() function, and the Start() function must have called
> OpenProtocol() on
> +     ControllerHandle with an Attribute of
> EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
> +
> +  @param[in]  This              A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle  A handle to the device being stopped.
> The handle must
> +                                support a bus specific I/O protocol
> for the driver
> +                                to use to stop the device.
> +  @param[in]  NumberOfChildren  The number of child device handles in
> ChildHandleBuffer.
> +  @param[in]  ChildHandleBuffer An array of child handles to be freed.
> May be NULL
> +                                if NumberOfChildren is 0.
> +
> +  @retval EFI_SUCCESS           The device was stopped.
> +  @retval EFI_DEVICE_ERROR      The device could not be stopped due
> to a device error.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStop (
> +  IN  EFI_DRIVER_BINDING_PROTOCOL *This,
> +  IN  EFI_HANDLE                  ControllerHandle,
> +  IN  UINTN                       NumberOfChildren,
> +  IN  EFI_HANDLE                  *ChildHandleBuffer OPTIONAL
> +  );
> +#endif
> diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> new file mode 100644
> index 0000000000..ff465d9ff3
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> @@ -0,0 +1,265 @@
> +/** @file
> +  The common code of EDKII Redfish Configuration Handler driver.
> +
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "RedfishConfigHandlerCommon.h"
> +
> +REDFISH_CONFIG_DRIVER_DATA      gRedfishConfigData; // Only one
> Redfish service supproted
> +                                                    // on
> platform for the BIOS
> +                                                    // Redfish
> configuration.
> +EFI_EVENT  gEndOfDxeEvent = NULL;
> +EFI_EVENT  gExitBootServiceEvent = NULL;
> +EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential = NULL;
> +
> +/**
> +  Callback function executed when the EndOfDxe event group is signaled.
> +
> +  @param[in]   Event    Event whose notification function is being
> invoked.
> +  @param[out]  Context  Pointer to the Context buffer.
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishConfigOnEndOfDxe (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_STATUS                          Status;
> +
> +  Status = gCredential->StopService (gCredential,
> ServiceStopTypeSecureBootDisabled);
> +  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
> +    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop
> service on EndOfDxe: %r", Status));
> +  }
> +
> +  //
> +  // Close event, so it will not be invoked again.
> +  //
> +  gBS->CloseEvent (gEndOfDxeEvent);
> +  gEndOfDxeEvent = NULL;
> +}
> +
> +/**
> +  Callback function executed when the ExitBootService event group is
> signaled.
> +
> +  @param[in]   Event    Event whose notification function is being
> invoked.
> +  @param[out]  Context  Pointer to the Context buffer
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishConfigOnExitBootService (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_STATUS                          Status;
> +
> +  Status = gCredential->StopService (gCredential,
> ServiceStopTypeExitBootService);
> +  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
> +    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop
> service on ExitBootService: %r", Status));
> +  }
> +}
> +
> +/**
> +  Unloads an image.
> +
> +  @param[in]  ImageHandle       Handle that identifies the image to
> be unloaded.
> +
> +  @retval EFI_SUCCESS           The image has been unloaded.
> +
> +**/
> +EFI_STATUS
> +RedfishConfigDriverCommonUnload (
> +  IN EFI_HANDLE  ImageHandle
> +  )
> +{
> +  if (gEndOfDxeEvent != NULL) {
> +    gBS->CloseEvent (gEndOfDxeEvent);
> +    gEndOfDxeEvent = NULL;
> +  }
> +
> +  if (gExitBootServiceEvent != NULL) {
> +    gBS->CloseEvent (gExitBootServiceEvent);
> +    gExitBootServiceEvent = NULL;
> +  }
> +
> +  if (gRedfishConfigData.Event != NULL) {
> +    gBS->CloseEvent (gRedfishConfigData.Event);
> +    gRedfishConfigData.Event = NULL;
> +  }
> +
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This is the common code for Redfish configuration UEFI and DXE driver
> +  initialization.
> +
> +  @param[in]  ImageHandle       The firmware allocated handle for
> the UEFI image.
> +  @param[in]  SystemTable       A pointer to the EFI System Table.
> +
> +  @retval EFI_SUCCESS           The operation completed successfully.
> +  @retval Others                An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonInit (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  )
> +{
> +  EFI_STATUS Status;
> +  //
> +  // Locate Redfish Credential Protocol to get credential for
> +  // accessing to Redfish service.
> +  //
> +  Status = gBS->LocateProtocol (&gEdkIIRedfishCredentialProtocolGuid,
> NULL, (VOID **) &gCredential);
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_INFO, "%a: No Redfish Credential Protocol is installed
> on system.", __FUNCTION__));
> +    return Status;
> +  }
> +  //
> +  // Create EndOfDxe Event.
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  RedfishConfigOnEndOfDxe,
> +                  NULL,
> +                  &gEfiEndOfDxeEventGroupGuid,
> +                  &gEndOfDxeEvent
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to register End Of DXE event.",
> __FUNCTION__));
> +    return Status;
> +  }
> +  //
> +  // Create Exit Boot Service event.
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  RedfishConfigOnExitBootService,
> +                  NULL,
> +                  &gEfiEventExitBootServicesGuid,
> +                  &gExitBootServiceEvent
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    gBS->CloseEvent (gEndOfDxeEvent);
> +    gEndOfDxeEvent = NULL;
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to register Exit Boot Service event.",
> __FUNCTION__));
> +    return Status;
> +  }
> +  return EFI_SUCCESS;
> +}
> +/**
> +  This is the common code to stop EDK2 Redfish feature driver.
> +
> +  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
> +                         stopped.
> +  @retval Others         An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonStop (
> +  VOID
> +)
> +{
> +  EFI_STATUS   Status;
> +  EFI_HANDLE  *HandleBuffer;
> +  UINTN        NumberOfHandles;
> +  UINTN        Index;
> +  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
> +
> +  Status = gBS->LocateHandleBuffer (
> +                  ByProtocol,
> +                  &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                  NULL,
> +                  &NumberOfHandles,
> +                  &HandleBuffer
> +                  );
> +  if (EFI_ERROR (Status) && Status != EFI_NOT_FOUND) {
> +    return Status;
> +  }
> +
> +  Status = EFI_SUCCESS;
> +  for (Index = 0; Index < NumberOfHandles; Index++) {
> +    Status = gBS->HandleProtocol (
> +                     HandleBuffer[Index],
> +                     &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                     (VOID**) &ConfigHandler
> +                     );
> +    ASSERT_EFI_ERROR (Status);
> +
> +    Status = ConfigHandler->Stop (ConfigHandler);
> +    if (EFI_ERROR (Status) && Status != EFI_UNSUPPORTED) {
> +      DEBUG ((DEBUG_ERROR, "ERROR: Failed to stop Redfish config
> handler %p.\n", ConfigHandler));
> +      break;
> +    }
> +  }
> +  return Status;
> +}
> +/**
> +  Callback function executed when a Redfish Config Handler Protocol is
> installed
> +  by EDK2 Redfish Feature Drivers.
> +
> +**/
> +VOID
> +RedfishConfigHandlerInitialization (
> +  VOID
> +  )
> +{
> +  EFI_STATUS                            Status;
> +  EFI_HANDLE                            *HandleBuffer;
> +  UINTN                                 NumberOfHandles;
> +  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
> +  UINTN                                 Index;
> +  UINT32                                Id;
> +
> +  Status = gBS->LocateHandleBuffer (
> +                  ByProtocol,
> +                  &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                  NULL,
> +                  &NumberOfHandles,
> +                  &HandleBuffer
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    return;
> +  }
> +
> +  for (Index = 0; Index < NumberOfHandles; Index++) {
> +    Status = gBS->HandleProtocol (
> +                    HandleBuffer [Index],
> +                    &gEfiCallerIdGuid,
> +                    (VOID **) &Id
> +                    );
> +    if (!EFI_ERROR (Status)) {
> +      continue;
> +    }
> +
> +    Status = gBS->HandleProtocol (
> +                     HandleBuffer [Index],
> +                     &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                     (VOID**) &ConfigHandler
> +                     );
> +    ASSERT_EFI_ERROR (Status);
> +    Status = ConfigHandler->Init (ConfigHandler,
> &gRedfishConfigData.RedfishServiceInfo);
> +    if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
> +      DEBUG ((DEBUG_ERROR, "ERROR: Failed to init Redfish config
> handler %p.\n", ConfigHandler));
> +    }
> +    //
> +    // Install caller ID to indicate Redfish Configure Handler is
initialized.
> +    //
> +    Status = gBS->InstallProtocolInterface (
> +                  &HandleBuffer [Index],
> +                  &gEfiCallerIdGuid,
> +                  EFI_NATIVE_INTERFACE,
> +                  (VOID *)&gRedfishConfigData.CallerId
> +                  );
> +    ASSERT_EFI_ERROR (Status);
> +  }
> +}
> diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> new file mode 100644
> index 0000000000..51378dff4f
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> @@ -0,0 +1,587 @@
> +/** @file
> +  The UEFI driver model driver which is responsible for locating the
> +  Redfish service through Redfish host interface and executing EDKII
> +  Redfish feature drivers.
> +
> +  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "RedfishConfigHandlerDriver.h"
> +
> +EFI_EVENT  gEfiRedfishDiscoverProtocolEvent = NULL;
> +
> +//
> +// Variables for using RFI Redfish Discover Protocol
> +//
> +VOID                             *gEfiRedfishDiscoverRegistration;
> +EFI_HANDLE
> gEfiRedfishDiscoverControllerHandle = NULL;
> +EFI_REDFISH_DISCOVER_PROTOCOL    *gEfiRedfishDiscoverProtocol =
> NULL;
> +BOOLEAN                          gRedfishDiscoverActivated =
> FALSE;
> +BOOLEAN                          gRedfishServiceDiscovered =
> FALSE;
> +//
> +// Network interfaces discovered by EFI Redfish Discover Protocol.
> +//
> +UINTN
> gNumberOfNetworkInterfaces;
> +EFI_REDFISH_DISCOVER_NETWORK_INTERFACE
> *gNetworkInterfaceInstances = NULL;
> +EFI_REDFISH_DISCOVERED_TOKEN
> *gRedfishDiscoveredToken = NULL;
> +
> +///
> +/// Driver Binding Protocol instance
> +///
> +EFI_DRIVER_BINDING_PROTOCOL gRedfishConfigDriverBinding = {
> +  RedfishConfigDriverBindingSupported,
> +  RedfishConfigDriverBindingStart,
> +  RedfishConfigDriverBindingStop,
> +  REDFISH_CONFIG_VERSION,
> +  NULL,
> +  NULL
> +};
> +
> +/**
> +  Stop acquiring Redfish service.
> +
> +**/
> +VOID
> +RedfishConfigStopRedfishDiscovery (
> +  VOID
> +)
> +{
> +  if (gRedfishDiscoverActivated) {
> +    //
> +    // No more EFI Discover Protocol.
> +    //
> +    if (gEfiRedfishDiscoverProtocolEvent != NULL) {
> +      gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> +    }
> +    //
> +    // Stop Redfish service discovery.
> +    //
> +    gEfiRedfishDiscoverProtocol->AbortAcquireRedfishService (
> +                                   gEfiRedfishDiscoverProtocol,
> +                                   gNetworkInterfaceInstances
> +                                   );
> +    gEfiRedfishDiscoverControllerHandle = NULL;
> +    gEfiRedfishDiscoverProtocol = NULL;
> +    gRedfishDiscoverActivated = FALSE;
> +    gRedfishServiceDiscovered = FALSE;
> +  }
> +}
> +
> +/**
> +  Callback function executed when a Redfish Config Handler Protocol is
> installed.
> +
> +  @param[in]  Event    Event whose notification function is being
> invoked.
> +  @param[in]  Context  Pointer to the REDFISH_CONFIG_DRIVER_DATA
> buffer.
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishConfigHandlerInstalledCallback (
> +  IN EFI_EVENT  Event,
> +  IN VOID       *Context
> +  )
> +{
> +  if (!gRedfishDiscoverActivated) {
> +    //
> +    // No Redfish service is discovered yet.
> +    //
> +    return;
> +  }
> +
> +  RedfishConfigHandlerInitialization ();
> +}
> +
> +/**
> +  Tests to see if this driver supports a given controller. If a child
device is
> provided,
> +  it further tests to see if this driver supports creating a handle for
the
> specified child device.
> +
> +  This function checks to see if the driver specified by This supports
the
> device specified by
> +  ControllerHandle. Drivers will typically use the device path attached
to
> +  ControllerHandle and/or the services from the bus I/O abstraction
> attached to
> +  ControllerHandle to determine if the driver supports ControllerHandle.
> This function
> +  may be called many times during platform initialization. In order to
reduce
> boot times, the tests
> +  performed by this function must be very small, and take as little time
as
> possible to execute. This
> +  function must not change the state of any hardware devices, and this
> function must be aware that the
> +  device specified by ControllerHandle may already be managed by the
> same driver or a
> +  different driver. This function must match its calls to AllocatePages()
with
> FreePages(),
> +  AllocatePool() with FreePool(), and OpenProtocol() with
CloseProtocol().
> +  Because ControllerHandle may have been previously started by the same
> driver, if a protocol is
> +  already in the opened state, then it must not be closed with
> CloseProtocol(). This is required
> +  to guarantee the state of ControllerHandle is not modified by this
> function.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to test.
> This handle
> +                                   must support a protocol
> interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion
> of a device path.  This
> +                                   parameter is ignored by device
> drivers, and is optional for bus
> +                                   drivers. For bus drivers, if this
> parameter is not NULL, then
> +                                   the bus driver must determine if
> the bus controller specified
> +                                   by ControllerHandle and the
> child controller specified
> +                                   by RemainingDevicePath are
> both supported by this
> +                                   bus driver.
> +
> +  @retval EFI_SUCCESS              The device specified by
> ControllerHandle and
> +                                   RemainingDevicePath is
> supported by the driver specified by This.
> +  @retval EFI_UNSUPPORTED          The device specified by
> ControllerHandle and
> +                                   RemainingDevicePath is not
> supported by the driver specified by This.
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingSupported (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  )
> +{
> +  EFI_REST_EX_PROTOCOL             *RestEx;
> +  EFI_STATUS                       Status;
> +  EFI_HANDLE                       ChildHandle;
> +
> +  ChildHandle = NULL;
> +
> +  //
> +  // Check if REST EX is ready. This just makes sure
> +  // the network stack is brought up.
> +  //
> +  Status = NetLibCreateServiceChild (
> +             ControllerHandle,
> +             This->ImageHandle,
> +             &gEfiRestExServiceBindingProtocolGuid,
> +             &ChildHandle
> +             );
> +  if (EFI_ERROR (Status)) {
> +    return EFI_UNSUPPORTED;
> +  }
> +
> +  //
> +  // Test if REST EX protocol is ready.
> +  //
> +  Status = gBS->OpenProtocol(
> +                  ChildHandle,
> +                  &gEfiRestExProtocolGuid,
> +                  (VOID**) &RestEx,
> +                  This->DriverBindingHandle,
> +                  ControllerHandle,
> +                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    Status = EFI_UNSUPPORTED;
> +  }
> +  NetLibDestroyServiceChild (
> +    ControllerHandle,
> +    This->ImageHandle,
> +    &gEfiRestExServiceBindingProtocolGuid,
> +    ChildHandle
> +    );
> +  return Status;
> +}
> +
> +/**
> +  Starts a device controller or a bus controller.
> +
> +  The Start() function is designed to be invoked from the EFI boot
service
> ConnectController().
> +  As a result, much of the error checking on the parameters to Start()
has
> been moved into this
> +  common boot service. It is legal to call Start() from other locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE.
> +  2. If RemainingDevicePath is not NULL, then it must be a pointer to a
> naturally aligned
> +     EFI_DEVICE_PATH_PROTOCOL.
> +  3. Prior to calling Start(), the Supported() function for the driver
specified
> by This must
> +     have been called with the same calling parameters, and Supported()
> must have returned EFI_SUCCESS.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to start.
> This handle
> +                                   must support a protocol
> interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion
> of a device path.  This
> +                                   parameter is ignored by device
> drivers, and is optional for bus
> +                                   drivers. For a bus driver, if this
> parameter is NULL, then handles
> +                                   for all the children of Controller
> are created by this driver.
> +                                   If this parameter is not NULL
> and the first Device Path Node is
> +                                   not the End of Device Path Node,
> then only the handle for the
> +                                   child device specified by the first
> Device Path Node of
> +                                   RemainingDevicePath is created
> by this driver.
> +                                   If the first Device Path Node of
> RemainingDevicePath is
> +                                   the End of Device Path Node, no
> child handle is created by this
> +                                   driver.
> +
> +  @retval EFI_SUCCESS              The driver is started.
> +  @retval EFI_ALREADY_STARTED      The driver was already started.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStart (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  )
> +{
> +  VOID *ConfigHandlerRegistration;
> +
> +  if (gRedfishConfigData.Event != NULL) {
> +    return EFI_ALREADY_STARTED;
> +  }
> +
> +  gRedfishConfigData.Event = EfiCreateProtocolNotifyEvent (
> +
> &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                                TPL_CALLBACK,
> +
> RedfishConfigHandlerInstalledCallback,
> +                                (VOID *)&gRedfishConfigData,
> +                                &ConfigHandlerRegistration
> +                                );
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  Stops a device controller or a bus controller.
> +
> +  The Stop() function is designed to be invoked from the EFI boot service
> DisconnectController().
> +  As a result, much of the error checking on the parameters to Stop() has
> been moved
> +  into this common boot service. It is legal to call Stop() from other
locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE that was used on a
> previous call to this
> +     same driver's Start() function.
> +  2. The first NumberOfChildren handles of ChildHandleBuffer must all be
a
> valid
> +     EFI_HANDLE. In addition, all of these handles must have been created
> in this driver's
> +     Start() function, and the Start() function must have called
> OpenProtocol() on
> +     ControllerHandle with an Attribute of
> EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
> +
> +  @param[in]  This              A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle  A handle to the device being stopped.
> The handle must
> +                                support a bus specific I/O protocol
> for the driver
> +                                to use to stop the device.
> +  @param[in]  NumberOfChildren  The number of child device handles in
> ChildHandleBuffer.
> +  @param[in]  ChildHandleBuffer An array of child handles to be freed.
> May be NULL
> +                                if NumberOfChildren is 0.
> +
> +  @retval EFI_SUCCESS           The device was stopped.
> +  @retval EFI_DEVICE_ERROR      The device could not be stopped due
> to a device error.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStop (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN UINTN                        NumberOfChildren,
> +  IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL
> +  )
> +{
> +  EFI_STATUS  Status;
> +
> +  if (ControllerHandle == gEfiRedfishDiscoverControllerHandle) {
> +    RedfishConfigStopRedfishDiscovery ();
> +  }
> +  gBS->CloseProtocol (
> +         ControllerHandle,
> +         &gEfiRedfishDiscoverProtocolGuid,
> +         gRedfishConfigData.Image,
> +         gRedfishConfigData.Image
> +         );
> +
> +  Status = RedfishConfigCommonStop ();
> +  if (EFI_ERROR (Status)) {
> +    return EFI_DEVICE_ERROR;
> +  }
> +
> +  if (gRedfishConfigData.Event != NULL) {
> +    gBS->CloseEvent (gRedfishConfigData.Event);
> +    gRedfishConfigData.Event = NULL;
> +  }
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  Callback function when Redfish service is discovered.
> +
> +  @param[in]   Event    Event whose notification function is being
> invoked.
> +  @param[out]  Context  Pointer to the Context buffer
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishServiceDiscoveredCallback (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_REDFISH_DISCOVERED_TOKEN *RedfishDiscoveredToken;
> +  EFI_REDFISH_DISCOVERED_INSTANCE *RedfishInstance;
> +
> +  if (gRedfishServiceDiscovered) {
> +    //
> +    // Only support one Redfish service on platform.
> +    //
> +    return;
> +  }
> +
> +  RedfishDiscoveredToken = (EFI_REDFISH_DISCOVERED_TOKEN *)Context;
> +  RedfishInstance =
> RedfishDiscoveredToken->DiscoverList.RedfishInstances;
> +  //
> +  // Only pick up the first found Redfish service.
> +  //
> +  if (RedfishInstance->Status == EFI_SUCCESS) {
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceRestExHandle =
> RedfishInstance->Information.RedfishRestExHandle;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceVersion      =
> RedfishInstance->Information.RedfishVersion;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceLocation     =
> RedfishInstance->Information.Location;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUuid         =
> RedfishInstance->Information.Uuid;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOs           =
> RedfishInstance->Information.Os;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOsVersion    =
> RedfishInstance->Information.OsVersion;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProduct      =
> RedfishInstance->Information.Product;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProductVer   =
> RedfishInstance->Information.ProductVer;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUseHttps     =
> RedfishInstance->Information.UseHttps;
> +    gRedfishServiceDiscovered = TRUE;
> +  }
> +
> +  //
> +  // Invoke RedfishConfigHandlerInstalledCallback to execute
> +  // the initialization of Redfish Configure Handler instance.
> +  //
> +  RedfishConfigHandlerInstalledCallback (gRedfishConfigData.Event,
> &gRedfishConfigData);
> +}
> +
> +/**
> +  Callback function executed when the EFI_REDFISH_DISCOVER_PROTOCOL
> +  protocol interface is installed.
> +
> +  @param[in]   Event    Event whose notification function is being
> invoked.
> +  @param[out]  Context  Pointer to the Context buffer
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishDiscoverProtocolInstalled (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_STATUS Status;
> +  UINTN BufferSize;
> +  EFI_HANDLE HandleBuffer;
> +  UINTN NetworkInterfaceIndex;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE *ThisNetworkInterface;
> +  EFI_REDFISH_DISCOVERED_TOKEN
> *ThisRedfishDiscoveredToken;
> +
> +  DEBUG((DEBUG_INFO, "%a: New network interface is installed on system
> by EFI Redfish discover driver.\n", __FUNCTION__));
> +
> +  BufferSize = sizeof (EFI_HANDLE);
> +  Status = gBS->LocateHandle (
> +                  ByRegisterNotify,
> +                  NULL,
> +                  gEfiRedfishDiscoverRegistration,
> +                  &BufferSize,
> +                  &HandleBuffer
> +                );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG((DEBUG_ERROR, "%a: Can't locate handle with
> EFI_REDFISH_DISCOVER_PROTOCOL installed.\n", __FUNCTION__));
> +  }
> +  gRedfishDiscoverActivated = TRUE;
> +  if (gEfiRedfishDiscoverProtocol == NULL) {
> +     gEfiRedfishDiscoverControllerHandle = HandleBuffer;
> +    //
> +    // First time to open EFI_REDFISH_DISCOVER_PROTOCOL.
> +    //
> +    Status = gBS->OpenProtocol(
> +                      gEfiRedfishDiscoverControllerHandle,
> +                      &gEfiRedfishDiscoverProtocolGuid,
> +                      (VOID **)&gEfiRedfishDiscoverProtocol,
> +                      gRedfishConfigData.Image,
> +                      gRedfishConfigData.Image,
> +                      EFI_OPEN_PROTOCOL_BY_DRIVER
> +                    );
> +    if (EFI_ERROR (Status)) {
> +      gEfiRedfishDiscoverProtocol = NULL;
> +      gRedfishDiscoverActivated = FALSE;
> +      DEBUG((DEBUG_ERROR, "%a: Can't locate
> EFI_REDFISH_DISCOVER_PROTOCOL.\n", __FUNCTION__));
> +      return;
> +    }
> +  }
> +  //
> +  // Check the new found network interface.
> +  //
> +  if (gNetworkInterfaceInstances != NULL) {
> +    FreePool (gNetworkInterfaceInstances);
> +  }
> +  Status = gEfiRedfishDiscoverProtocol->GetNetworkInterfaceList(
> +
> gEfiRedfishDiscoverProtocol,
> +
> gRedfishConfigData.Image,
> +
> &gNumberOfNetworkInterfaces,
> +
> &gNetworkInterfaceInstances
> +                                          );
> +  if (EFI_ERROR (Status) || gNumberOfNetworkInterfaces == 0) {
> +    DEBUG((DEBUG_ERROR, "%a: No network interfaces found on the
> handle.\n", __FUNCTION__));
> +    return;
> +  }
> +
> +  gRedfishDiscoveredToken = AllocateZeroPool
> (gNumberOfNetworkInterfaces * sizeof
> (EFI_REDFISH_DISCOVERED_TOKEN));
> +  if (gRedfishDiscoveredToken == NULL) {
> +    DEBUG((DEBUG_ERROR, "%a: Not enough memory for
> EFI_REDFISH_DISCOVERED_TOKEN.\n", __FUNCTION__));
> +    return;
> +  }
> +
> +  ThisNetworkInterface = gNetworkInterfaceInstances;
> +  ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
> +  //
> +  // Loop to discover Redfish service on each network interface.
> +  //
> +  for (NetworkInterfaceIndex = 0; NetworkInterfaceIndex <
> gNumberOfNetworkInterfaces; NetworkInterfaceIndex ++) {
> +    //
> +    // Initial this Redfish Discovered Token
> +    //
> +    Status = gBS->CreateEvent (
> +                    EVT_NOTIFY_SIGNAL,
> +                    TPL_CALLBACK,
> +                    RedfishServiceDiscoveredCallback,
> +                    (VOID *)ThisRedfishDiscoveredToken,
> +                    &ThisRedfishDiscoveredToken->Event
> +                  );
> +    if (EFI_ERROR (Status)) {
> +      DEBUG((DEBUG_ERROR, "%a: Failed to create event for Redfish
> discovered token.\n", __FUNCTION__));
> +      goto ErrorReturn;
> +    }
> +    ThisRedfishDiscoveredToken->Signature =
> REDFISH_DISCOVER_TOKEN_SIGNATURE;
> +    ThisRedfishDiscoveredToken->DiscoverList.NumberOfServiceFound = 0;
> +    ThisRedfishDiscoveredToken->DiscoverList.RedfishInstances = NULL;
> +    //
> +    // Acquire for Redfish service which is reported by
> +    // Redfish Host Interface.
> +    //
> +    Status = gEfiRedfishDiscoverProtocol->AcquireRedfishService(
> +
> gEfiRedfishDiscoverProtocol,
> +
> gRedfishConfigData.Image,
> +
> ThisNetworkInterface,
> +
> EFI_REDFISH_DISCOVER_HOST_INTERFACE,
> +
> ThisRedfishDiscoveredToken
> +                                             );
> +    ThisNetworkInterface ++;
> +    ThisRedfishDiscoveredToken ++;
> +  }
> +  if (EFI_ERROR (Status)) {
> +    DEBUG((DEBUG_ERROR, "%a: Acquire Redfish service fail.\n",
> __FUNCTION__));
> +    goto ErrorReturn;
> +  }
> +  return;
> +
> +ErrorReturn:
> +  if (gRedfishDiscoveredToken != NULL) {
> +    FreePool(gRedfishDiscoveredToken);
> +  }
> +}
> +
> +/**
> +  Unloads an image.
> +
> +  @param[in]  ImageHandle       Handle that identifies the image to
> be unloaded.
> +
> +  @retval EFI_SUCCESS           The image has been unloaded.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigHandlerDriverUnload (
> +  IN EFI_HANDLE  ImageHandle
> +  )
> +{
> +  EFI_REDFISH_DISCOVERED_TOKEN *ThisRedfishDiscoveredToken;
> +  UINTN NumberOfNetworkInterfacesIndex;
> +
> +  RedfishConfigDriverCommonUnload (ImageHandle);
> +
> +  RedfishConfigStopRedfishDiscovery ();
> +  if (gRedfishDiscoveredToken != NULL) {
> +    ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
> +    for (NumberOfNetworkInterfacesIndex = 0;
> NumberOfNetworkInterfacesIndex < gNumberOfNetworkInterfaces;
> NumberOfNetworkInterfacesIndex ++) {
> +      if (ThisRedfishDiscoveredToken->Event != NULL) {
> +        gBS->CloseEvent (ThisRedfishDiscoveredToken->Event);
> +      }
> +      FreePool (ThisRedfishDiscoveredToken);
> +      ThisRedfishDiscoveredToken ++;
> +    }
> +    gRedfishDiscoveredToken = NULL;
> +  }
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This is the declaration of an EFI image entry point. This entry point
is
> +  the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers
> including
> +  both device drivers and bus drivers.
> +
> +  @param[in]  ImageHandle       The firmware allocated handle for
> the UEFI image.
> +  @param[in]  SystemTable       A pointer to the EFI System Table.
> +
> +  @retval EFI_SUCCESS           The operation completed successfully.
> +  @retval Others                An unexpected error occurred.
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigHandlerDriverEntryPoint (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  )
> +{
> +  EFI_STATUS    Status;
> +
> +  ZeroMem ((VOID *)&gRedfishConfigData, sizeof
> (REDFISH_CONFIG_DRIVER_DATA));
> +  gRedfishConfigData.Image = ImageHandle;
> +  //
> +  // Register event for EFI_REDFISH_DISCOVER_PROTOCOL protocol install
> +  // notification.
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  RedfishDiscoverProtocolInstalled,
> +                  NULL,
> +                  &gEfiRedfishDiscoverProtocolGuid,
> +                  &gEfiRedfishDiscoverProtocolEvent
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to create event for the installation
> of EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
> +    return Status;
> +  }
> +  Status = gBS->RegisterProtocolNotify (
> +                  &gEfiRedfishDiscoverProtocolGuid,
> +                  gEfiRedfishDiscoverProtocolEvent,
> +                  &gEfiRedfishDiscoverRegistration
> +                );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to register event for the installation
> of EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
> +    return Status;
> +  }
> +
> +  Status = RedfishConfigCommonInit (ImageHandle, SystemTable);
> +  if (EFI_ERROR (Status)) {
> +    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> +    gEfiRedfishDiscoverProtocolEvent = NULL;
> +    return Status;
> +  }
> +
> +  //
> +  // Install UEFI Driver Model protocol(s).
> +  //
> +  Status = EfiLibInstallDriverBinding (
> +             ImageHandle,
> +             SystemTable,
> +             &gRedfishConfigDriverBinding,
> +             ImageHandle
> +             );
> +  if (EFI_ERROR (Status)) {
> +    gBS->CloseEvent (gEndOfDxeEvent);
> +    gEndOfDxeEvent = NULL;
> +    gBS->CloseEvent (gExitBootServiceEvent);
> +    gExitBootServiceEvent = NULL;
> +    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> +    gEfiRedfishDiscoverProtocolEvent = NULL;
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to install EFI Binding Protocol of EFI
> Redfish Config driver.", __FUNCTION__));
> +    return Status;
> +  }
> +  return Status;
> +}
> +
> --
> 2.17.1
> 
> 
> 
> 
> 





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it was created before. I just revised the title to EDKII Redfish Config Handler Protocol instead of using EFI as the prefix.
https://bugzilla.tianocore.org/show_bug.cgi?id=2911

Will add BZ# to the commit message.
Thanks


> -----Original Message-----
> From: gaoliming [mailto:gaoliming@byosoft.com.cn]
> Sent: Wednesday, April 7, 2021 1:21 PM
> To: devel@edk2.groups.io; Chang, Abner (HPS SW/FW Technologist)
> <abner.chang@hpe.com>
> Cc: Wang, Nickle (HPS SW) <nickle.wang@hpe.com>
> Subject: 回复: [edk2-devel] [PATCH] RedfishPkg/RedfishConfigHandler:
> EDKII RedfishConfigHandler Protocol
> 
> Abner:
>   This is a new feature. Can you submit one BZ for it?
> 
> Thanks
> Liming
> > -----邮件原件-----
> > 发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Abner
> Chang
> > 发送时间: 2021年3月26日 13:55
> > 收件人: devel@edk2.groups.io
> > 抄送: Nickle Wang <nickle.wang@hpe.com>
> > 主题: [edk2-devel] [PATCH] RedfishPkg/RedfishConfigHandler: EDKII
> > RedfishConfigHandler Protocol
> >
> > The driver is used to manage EDK2 Redfish Configuration Handler
> > Protocol installed by EDK2 Redfish feature drivers.
> > This is the EDK2 Redfish client driver written based on the EDK2
> > Redfish foundation to initialize EDK2 Redfish feature drivers.
> >
> > EDK2 Redfish feature drivers are used to provision/consume/update
> > the firmware owns Redfish properties during system power on
> > initialization.
> >
> > RedfishConfigHandlerCommon.c has the common code for the driver
> > instances used in different EDK2 boot phases or used by different
> > driver models in the future contribution.
> >
> > Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
> > Signed-off-by: Siyuan Fu <siyuan.fu@intel.com>
> > Signed-off-by: Fan Wang <fan.wang@intel.com>
> > Signed-off-by: Abner Chang <abner.chang@hpe.com>
> >
> > Cc: Nickle Wang <nickle.wang@hpe.com>
> > ---
> >  RedfishPkg/RedfishComponents.dsc.inc          |   3 +-
> >  RedfishPkg/Redfish.fdf.inc                    |   3 +-
> >  .../RedfishConfigHandlerDriver.inf            |  60 ++
> >  .../RedfishConfigHandlerCommon.h              | 101 +++
> >  .../RedfishConfigHandlerDriver.h              | 159 +++++
> >  .../RedfishConfigHandlerCommon.c              | 265 ++++++++
> >  .../RedfishConfigHandlerDriver.c              | 587
> > ++++++++++++++++++
> >  7 files changed, 1176 insertions(+), 2 deletions(-)
> >  create mode 100644
> > RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> >  create mode 100644
> > RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> >  create mode 100644
> > RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> >  create mode 100644
> > RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> >  create mode 100644
> > RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> >
> > diff --git a/RedfishPkg/RedfishComponents.dsc.inc
> > b/RedfishPkg/RedfishComponents.dsc.inc
> > index 08f1d3bc32..d0116f065c 100644
> > --- a/RedfishPkg/RedfishComponents.dsc.inc
> > +++ b/RedfishPkg/RedfishComponents.dsc.inc
> > @@ -6,7 +6,7 @@
> >  # of EDKII Redfish drivers according to the value of flags described in
> >  # "RedfishDefines.dsc.inc".
> >  #
> > -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> > +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> >  #
> >  #    SPDX-License-Identifier: BSD-2-Clause-Patent
> >  #
> > @@ -17,4 +17,5 @@
> >    RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
> >    RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
> >    RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
> > +  RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> >  !endif
> > diff --git a/RedfishPkg/Redfish.fdf.inc b/RedfishPkg/Redfish.fdf.inc
> > index a64fd119a9..9673246b3f 100644
> > --- a/RedfishPkg/Redfish.fdf.inc
> > +++ b/RedfishPkg/Redfish.fdf.inc
> > @@ -5,7 +5,7 @@
> >  # by using "!include RedfishPkg/RedfisLibs.fdf.inc" to specify the module
> > instances
> >  # to be built in the firmware volume.
> >  #
> > -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> > +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> >  #
> >  #    SPDX-License-Identifier: BSD-2-Clause-Patent
> >  #
> > @@ -15,4 +15,5 @@
> >    INF RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
> >    INF RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
> >    INF RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
> > +  INF RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> >  !endif
> > diff --git
> a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> > b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> > new file mode 100644
> > index 0000000000..def91c7531
> > --- /dev/null
> > +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> > @@ -0,0 +1,60 @@
> > +## @file
> > +#  INF file for the UEFI driver model Redfish Configuration Handler
> > +#  Driver.
> > +#
> > +#  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> > +#  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> > +#
> > +#  SPDX-License-Identifier: BSD-2-Clause-Patent
> > +#
> > +##
> > +
> > +[Defines]
> > +  INF_VERSION               = 0x0001000b
> > +  BASE_NAME                 = RedfishConfigHandlerDriver
> > +  FILE_GUID                 =
> > 6e881000-5749-11e8-9bf0-8cdcd426c973
> > +  MODULE_TYPE               = UEFI_DRIVER
> > +  VERSION_STRING            = 1.0
> > +  ENTRY_POINT               = RedfishConfigHandlerDriverEntryPoint
> > +  UNLOAD_IMAGE              = RedfishConfigHandlerDriverUnload
> > +
> > +#
> > +#  VALID_ARCHITECTURES      = IA32 X64 ARM AARCH64 RISCV64
> > +#
> > +
> > +[Packages]
> > +  MdePkg/MdePkg.dec
> > +  MdeModulePkg/MdeModulePkg.dec
> > +  NetworkPkg/NetworkPkg.dec
> > +  RedfishPkg/RedfishPkg.dec
> > +
> > +[Sources]
> > +  RedfishConfigHandlerDriver.h
> > +  RedfishConfigHandlerDriver.c
> > +  RedfishConfigHandlerCommon.h
> > +  RedfishConfigHandlerCommon.c
> > +
> > +[LibraryClasses]
> > +  BaseLib
> > +  BaseMemoryLib
> > +  DebugLib
> > +  UefiLib
> > +  MemoryAllocationLib
> > +  NetLib
> > +  UefiBootServicesTableLib
> > +  UefiDriverEntryPoint
> > +
> > +[Protocols]
> > +  gEfiRedfishDiscoverProtocolGuid         ## CONSUMES
> > +  gEfiRestExServiceBindingProtocolGuid
> > +  gEfiRestExProtocolGuid                  ## CONSUMES
> > +  gEdkIIRedfishCredentialProtocolGuid     ## CONSUMES
> > +  gEdkIIRedfishConfigHandlerProtocolGuid  ## CONSUMES
> > +
> > +[Guids]
> > +  gEfiEventExitBootServicesGuid           ## CONSUMES ## Event
> > +  gEfiEndOfDxeEventGroupGuid              ## CONSUMES ## Event
> > +
> > +[Depex]
> > +  TRUE
> > +
> > diff --git
> a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> > b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> > new file mode 100644
> > index 0000000000..5e46c42219
> > --- /dev/null
> > +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> > @@ -0,0 +1,101 @@
> > +/** @file
> > +  Common Header file for Redfish Configuration Handler UEFI driver
> > +  and DXE driver.
> > +
> > +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> > +
> > +  SPDX-License-Identifier: BSD-2-Clause-Patent
> > +
> > +**/
> > +
> > +#ifndef EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
> > +#define EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
> > +
> > +#include <Uefi.h>
> > +
> > +//
> > +// Libraries
> > +//
> > +#include <Library/BaseLib.h>
> > +#include <Library/BaseMemoryLib.h>
> > +#include <Library/DebugLib.h>
> > +#include <Library/MemoryAllocationLib.h>
> > +#include <Library/NetLib.h>
> > +#include <Library/UefiBootServicesTableLib.h>
> > +#include <Library/UefiDriverEntryPoint.h>
> > +#include <Library/UefiLib.h>
> > +
> > +//
> > +// Consumed Protocols
> > +//
> > +#include <Protocol/EdkIIRedfishCredential.h>
> > +#include <Protocol/EdkIIRedfishConfigHandler.h>
> > +
> > +//
> > +// Driver Version
> > +//
> > +#define REDFISH_CONFIG_VERSION  0x00000001
> > +
> > +///
> > +///  Internal structure used by Redfish Config DXE driver.
> > +///
> > +typedef struct {
> > +  UINT32        CallerId;  ///< Caller ID used to indicate Redfish Config
> > Handler
> > +                           ///< has been initiated
> > +  EFI_HANDLE    Image;     ///< Image handle of Redfish Config Driver
> > +  EFI_EVENT     Event;     ///< Event for the notification of
> > EFI_REDFISH_CONFIG_HANDLER_PROTOCOL
> > +  REDFISH_CONFIG_SERVICE_INFORMATION RedfishServiceInfo; ///
> > Redfish Service information discovered
> > +} REDFISH_CONFIG_DRIVER_DATA;
> > +
> > +/**
> > +  Common code of unloading image for both UEFI/DXE Redfish
> Configuration
> > drivers.
> > +
> > +  @param[in]  ImageHandle       Handle that identifies the image to
> > be unloaded.
> > +
> > +  @retval EFI_SUCCESS           The image has been unloaded.
> > +
> > +**/
> > +EFI_STATUS
> > +RedfishConfigDriverCommonUnload (
> > +  IN EFI_HANDLE  ImageHandle
> > +  );
> > +
> > +/**
> > +  This is the common code for Redfish configuration UEFI and DXE driver
> > +  initialization.
> > +
> > +  @param[in]  ImageHandle       The firmware allocated handle for
> > the UEFI image.
> > +  @param[in]  SystemTable       A pointer to the EFI System Table.
> > +
> > +  @retval EFI_SUCCESS           The operation completed successfully.
> > +  @retval Others                An unexpected error occurred.
> > +**/
> > +EFI_STATUS
> > +RedfishConfigCommonInit (
> > +  IN EFI_HANDLE        ImageHandle,
> > +  IN EFI_SYSTEM_TABLE  *SystemTable
> > +  );
> > +
> > +/**
> > +  This is the common code to stop EDK2 Redfish feature driver.
> > +
> > +  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
> > +                         stopped.
> > +  @retval Others         An unexpected error occurred.
> > +**/
> > +EFI_STATUS
> > +RedfishConfigCommonStop (
> > +  VOID
> > +);
> > +
> > +/**
> > +  Callback function executed when a Redfish Config Handler Protocol is
> > installed
> > +  by EDK2 Redfish Feature Drivers.
> > +
> > +**/
> > +VOID
> > +RedfishConfigHandlerInitialization (
> > +  VOID
> > +  );
> > +
> > +#endif
> > diff --git
> a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> > b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> > new file mode 100644
> > index 0000000000..58202c41e2
> > --- /dev/null
> > +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> > @@ -0,0 +1,159 @@
> > +/** @file
> > +  Header file of Redfish Configuration Handler UEFI driver.
> > +
> > +  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> > +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> > +
> > +  SPDX-License-Identifier: BSD-2-Clause-Patent
> > +
> > +**/
> > +
> > +#ifndef EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
> > +#define EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
> > +
> > +#include "RedfishConfigHandlerCommon.h"
> > +
> > +//
> > +// UEFI Driver Model Protocols
> > +//
> > +
> > +#include <Protocol/DriverBinding.h>
> > +#include <Protocol/RedfishDiscover.h>
> > +#include <Protocol/RestEx.h>
> > +
> > +//
> > +// Protocol instances
> > +//
> > +extern EFI_DRIVER_BINDING_PROTOCOL  gRedfishConfigDriverBinding;
> > +
> > +extern REDFISH_CONFIG_DRIVER_DATA        gRedfishConfigData;
> > +extern EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential;
> > +extern EFI_EVENT                         gEndOfDxeEvent;
> > +extern EFI_EVENT                         gExitBootServiceEvent;
> > +
> > +/**
> > +  Tests to see if this driver supports a given controller. If a child
> device is
> > provided,
> > +  it further tests to see if this driver supports creating a handle for
> the
> > specified child device.
> > +
> > +  This function checks to see if the driver specified by This supports
> the
> > device specified by
> > +  ControllerHandle. Drivers will typically use the device path attached
> to
> > +  ControllerHandle and/or the services from the bus I/O abstraction
> > attached to
> > +  ControllerHandle to determine if the driver supports ControllerHandle.
> > This function
> > +  may be called many times during platform initialization. In order to
> reduce
> > boot times, the tests
> > +  performed by this function must be very small, and take as little time
> as
> > possible to execute. This
> > +  function must not change the state of any hardware devices, and this
> > function must be aware that the
> > +  device specified by ControllerHandle may already be managed by the
> > same driver or a
> > +  different driver. This function must match its calls to AllocatePages()
> with
> > FreePages(),
> > +  AllocatePool() with FreePool(), and OpenProtocol() with
> CloseProtocol().
> > +  Because ControllerHandle may have been previously started by the
> same
> > driver, if a protocol is
> > +  already in the opened state, then it must not be closed with
> > CloseProtocol(). This is required
> > +  to guarantee the state of ControllerHandle is not modified by this
> > function.
> > +
> > +  @param[in]  This                 A pointer to the
> > EFI_DRIVER_BINDING_PROTOCOL instance.
> > +  @param[in]  ControllerHandle     The handle of the controller to test.
> > This handle
> > +                                   must support a protocol
> > interface that supplies
> > +                                   an I/O abstraction to the driver.
> > +  @param[in]  RemainingDevicePath  A pointer to the remaining portion
> > of a device path.  This
> > +                                   parameter is ignored by device
> > drivers, and is optional for bus
> > +                                   drivers. For bus drivers, if this
> > parameter is not NULL, then
> > +                                   the bus driver must determine if
> > the bus controller specified
> > +                                   by ControllerHandle and the
> > child controller specified
> > +                                   by RemainingDevicePath are
> > both supported by this
> > +                                   bus driver.
> > +
> > +  @retval EFI_SUCCESS              The device specified by
> > ControllerHandle and
> > +                                   RemainingDevicePath is
> > supported by the driver specified by This.
> > +  @retval EFI_ALREADY_STARTED      The device specified by
> > ControllerHandle and
> > +                                   RemainingDevicePath is already
> > being managed by the driver
> > +                                   specified by This.
> > +  @retval EFI_ACCESS_DENIED        The device specified by
> > ControllerHandle and
> > +                                   RemainingDevicePath is already
> > being managed by a different
> > +                                   driver or an application that
> > requires exclusive access.
> > +                                   Currently not implemented.
> > +  @retval EFI_UNSUPPORTED          The device specified by
> > ControllerHandle and
> > +                                   RemainingDevicePath is not
> > supported by the driver specified by This.
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +RedfishConfigDriverBindingSupported (
> > +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> > +  IN EFI_HANDLE                   ControllerHandle,
> > +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> > +  );
> > +
> > +/**
> > +  Starts a device controller or a bus controller.
> > +
> > +  The Start() function is designed to be invoked from the EFI boot
> service
> > ConnectController().
> > +  As a result, much of the error checking on the parameters to Start()
> has
> > been moved into this
> > +  common boot service. It is legal to call Start() from other locations,
> > +  but the following calling restrictions must be followed, or the system
> > behavior will not be deterministic.
> > +  1. ControllerHandle must be a valid EFI_HANDLE.
> > +  2. If RemainingDevicePath is not NULL, then it must be a pointer to a
> > naturally aligned
> > +     EFI_DEVICE_PATH_PROTOCOL.
> > +  3. Prior to calling Start(), the Supported() function for the driver
> specified
> > by This must
> > +     have been called with the same calling parameters, and Supported()
> > must have returned EFI_SUCCESS.
> > +
> > +  @param[in]  This                 A pointer to the
> > EFI_DRIVER_BINDING_PROTOCOL instance.
> > +  @param[in]  ControllerHandle     The handle of the controller to start.
> > This handle
> > +                                   must support a protocol
> > interface that supplies
> > +                                   an I/O abstraction to the driver.
> > +  @param[in]  RemainingDevicePath  A pointer to the remaining portion
> > of a device path.  This
> > +                                   parameter is ignored by device
> > drivers, and is optional for bus
> > +                                   drivers. For a bus driver, if this
> > parameter is NULL, then handles
> > +                                   for all the children of Controller
> > are created by this driver.
> > +                                   If this parameter is not NULL
> > and the first Device Path Node is
> > +                                   not the End of Device Path Node,
> > then only the handle for the
> > +                                   child device specified by the first
> > Device Path Node of
> > +                                   RemainingDevicePath is created
> > by this driver.
> > +                                   If the first Device Path Node of
> > RemainingDevicePath is
> > +                                   the End of Device Path Node, no
> > child handle is created by this
> > +                                   driver.
> > +
> > +  @retval EFI_SUCCESS              The driver is started.
> > +  @retval EFI_ALREADY_STARTED      The driver was already started.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +RedfishConfigDriverBindingStart (
> > +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> > +  IN EFI_HANDLE                   ControllerHandle,
> > +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> > +  );
> > +
> > +/**
> > +  Stops a device controller or a bus controller.
> > +
> > +  The Stop() function is designed to be invoked from the EFI boot service
> > DisconnectController().
> > +  As a result, much of the error checking on the parameters to Stop() has
> > been moved
> > +  into this common boot service. It is legal to call Stop() from other
> locations,
> > +  but the following calling restrictions must be followed, or the system
> > behavior will not be deterministic.
> > +  1. ControllerHandle must be a valid EFI_HANDLE that was used on a
> > previous call to this
> > +     same driver's Start() function.
> > +  2. The first NumberOfChildren handles of ChildHandleBuffer must all be
> a
> > valid
> > +     EFI_HANDLE. In addition, all of these handles must have been created
> > in this driver's
> > +     Start() function, and the Start() function must have called
> > OpenProtocol() on
> > +     ControllerHandle with an Attribute of
> > EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
> > +
> > +  @param[in]  This              A pointer to the
> > EFI_DRIVER_BINDING_PROTOCOL instance.
> > +  @param[in]  ControllerHandle  A handle to the device being stopped.
> > The handle must
> > +                                support a bus specific I/O protocol
> > for the driver
> > +                                to use to stop the device.
> > +  @param[in]  NumberOfChildren  The number of child device handles in
> > ChildHandleBuffer.
> > +  @param[in]  ChildHandleBuffer An array of child handles to be freed.
> > May be NULL
> > +                                if NumberOfChildren is 0.
> > +
> > +  @retval EFI_SUCCESS           The device was stopped.
> > +  @retval EFI_DEVICE_ERROR      The device could not be stopped due
> > to a device error.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +RedfishConfigDriverBindingStop (
> > +  IN  EFI_DRIVER_BINDING_PROTOCOL *This,
> > +  IN  EFI_HANDLE                  ControllerHandle,
> > +  IN  UINTN                       NumberOfChildren,
> > +  IN  EFI_HANDLE                  *ChildHandleBuffer OPTIONAL
> > +  );
> > +#endif
> > diff --git
> a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> > b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> > new file mode 100644
> > index 0000000000..ff465d9ff3
> > --- /dev/null
> > +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> > @@ -0,0 +1,265 @@
> > +/** @file
> > +  The common code of EDKII Redfish Configuration Handler driver.
> > +
> > +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> > +
> > +  SPDX-License-Identifier: BSD-2-Clause-Patent
> > +
> > +**/
> > +
> > +#include "RedfishConfigHandlerCommon.h"
> > +
> > +REDFISH_CONFIG_DRIVER_DATA      gRedfishConfigData; // Only one
> > Redfish service supproted
> > +                                                    // on
> > platform for the BIOS
> > +                                                    // Redfish
> > configuration.
> > +EFI_EVENT  gEndOfDxeEvent = NULL;
> > +EFI_EVENT  gExitBootServiceEvent = NULL;
> > +EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential = NULL;
> > +
> > +/**
> > +  Callback function executed when the EndOfDxe event group is signaled.
> > +
> > +  @param[in]   Event    Event whose notification function is being
> > invoked.
> > +  @param[out]  Context  Pointer to the Context buffer.
> > +
> > +**/
> > +VOID
> > +EFIAPI
> > +RedfishConfigOnEndOfDxe (
> > +  IN  EFI_EVENT  Event,
> > +  OUT VOID       *Context
> > +  )
> > +{
> > +  EFI_STATUS                          Status;
> > +
> > +  Status = gCredential->StopService (gCredential,
> > ServiceStopTypeSecureBootDisabled);
> > +  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
> > +    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop
> > service on EndOfDxe: %r", Status));
> > +  }
> > +
> > +  //
> > +  // Close event, so it will not be invoked again.
> > +  //
> > +  gBS->CloseEvent (gEndOfDxeEvent);
> > +  gEndOfDxeEvent = NULL;
> > +}
> > +
> > +/**
> > +  Callback function executed when the ExitBootService event group is
> > signaled.
> > +
> > +  @param[in]   Event    Event whose notification function is being
> > invoked.
> > +  @param[out]  Context  Pointer to the Context buffer
> > +
> > +**/
> > +VOID
> > +EFIAPI
> > +RedfishConfigOnExitBootService (
> > +  IN  EFI_EVENT  Event,
> > +  OUT VOID       *Context
> > +  )
> > +{
> > +  EFI_STATUS                          Status;
> > +
> > +  Status = gCredential->StopService (gCredential,
> > ServiceStopTypeExitBootService);
> > +  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
> > +    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop
> > service on ExitBootService: %r", Status));
> > +  }
> > +}
> > +
> > +/**
> > +  Unloads an image.
> > +
> > +  @param[in]  ImageHandle       Handle that identifies the image to
> > be unloaded.
> > +
> > +  @retval EFI_SUCCESS           The image has been unloaded.
> > +
> > +**/
> > +EFI_STATUS
> > +RedfishConfigDriverCommonUnload (
> > +  IN EFI_HANDLE  ImageHandle
> > +  )
> > +{
> > +  if (gEndOfDxeEvent != NULL) {
> > +    gBS->CloseEvent (gEndOfDxeEvent);
> > +    gEndOfDxeEvent = NULL;
> > +  }
> > +
> > +  if (gExitBootServiceEvent != NULL) {
> > +    gBS->CloseEvent (gExitBootServiceEvent);
> > +    gExitBootServiceEvent = NULL;
> > +  }
> > +
> > +  if (gRedfishConfigData.Event != NULL) {
> > +    gBS->CloseEvent (gRedfishConfigData.Event);
> > +    gRedfishConfigData.Event = NULL;
> > +  }
> > +
> > +  return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > +  This is the common code for Redfish configuration UEFI and DXE driver
> > +  initialization.
> > +
> > +  @param[in]  ImageHandle       The firmware allocated handle for
> > the UEFI image.
> > +  @param[in]  SystemTable       A pointer to the EFI System Table.
> > +
> > +  @retval EFI_SUCCESS           The operation completed successfully.
> > +  @retval Others                An unexpected error occurred.
> > +**/
> > +EFI_STATUS
> > +RedfishConfigCommonInit (
> > +  IN EFI_HANDLE        ImageHandle,
> > +  IN EFI_SYSTEM_TABLE  *SystemTable
> > +  )
> > +{
> > +  EFI_STATUS Status;
> > +  //
> > +  // Locate Redfish Credential Protocol to get credential for
> > +  // accessing to Redfish service.
> > +  //
> > +  Status = gBS->LocateProtocol (&gEdkIIRedfishCredentialProtocolGuid,
> > NULL, (VOID **) &gCredential);
> > +  if (EFI_ERROR (Status)) {
> > +    DEBUG ((DEBUG_INFO, "%a: No Redfish Credential Protocol is installed
> > on system.", __FUNCTION__));
> > +    return Status;
> > +  }
> > +  //
> > +  // Create EndOfDxe Event.
> > +  //
> > +  Status = gBS->CreateEventEx (
> > +                  EVT_NOTIFY_SIGNAL,
> > +                  TPL_CALLBACK,
> > +                  RedfishConfigOnEndOfDxe,
> > +                  NULL,
> > +                  &gEfiEndOfDxeEventGroupGuid,
> > +                  &gEndOfDxeEvent
> > +                  );
> > +  if (EFI_ERROR (Status)) {
> > +    DEBUG ((DEBUG_ERROR, "%a: Fail to register End Of DXE event.",
> > __FUNCTION__));
> > +    return Status;
> > +  }
> > +  //
> > +  // Create Exit Boot Service event.
> > +  //
> > +  Status = gBS->CreateEventEx (
> > +                  EVT_NOTIFY_SIGNAL,
> > +                  TPL_CALLBACK,
> > +                  RedfishConfigOnExitBootService,
> > +                  NULL,
> > +                  &gEfiEventExitBootServicesGuid,
> > +                  &gExitBootServiceEvent
> > +                  );
> > +  if (EFI_ERROR (Status)) {
> > +    gBS->CloseEvent (gEndOfDxeEvent);
> > +    gEndOfDxeEvent = NULL;
> > +    DEBUG ((DEBUG_ERROR, "%a: Fail to register Exit Boot Service event.",
> > __FUNCTION__));
> > +    return Status;
> > +  }
> > +  return EFI_SUCCESS;
> > +}
> > +/**
> > +  This is the common code to stop EDK2 Redfish feature driver.
> > +
> > +  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
> > +                         stopped.
> > +  @retval Others         An unexpected error occurred.
> > +**/
> > +EFI_STATUS
> > +RedfishConfigCommonStop (
> > +  VOID
> > +)
> > +{
> > +  EFI_STATUS   Status;
> > +  EFI_HANDLE  *HandleBuffer;
> > +  UINTN        NumberOfHandles;
> > +  UINTN        Index;
> > +  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
> > +
> > +  Status = gBS->LocateHandleBuffer (
> > +                  ByProtocol,
> > +                  &gEdkIIRedfishConfigHandlerProtocolGuid,
> > +                  NULL,
> > +                  &NumberOfHandles,
> > +                  &HandleBuffer
> > +                  );
> > +  if (EFI_ERROR (Status) && Status != EFI_NOT_FOUND) {
> > +    return Status;
> > +  }
> > +
> > +  Status = EFI_SUCCESS;
> > +  for (Index = 0; Index < NumberOfHandles; Index++) {
> > +    Status = gBS->HandleProtocol (
> > +                     HandleBuffer[Index],
> > +                     &gEdkIIRedfishConfigHandlerProtocolGuid,
> > +                     (VOID**) &ConfigHandler
> > +                     );
> > +    ASSERT_EFI_ERROR (Status);
> > +
> > +    Status = ConfigHandler->Stop (ConfigHandler);
> > +    if (EFI_ERROR (Status) && Status != EFI_UNSUPPORTED) {
> > +      DEBUG ((DEBUG_ERROR, "ERROR: Failed to stop Redfish config
> > handler %p.\n", ConfigHandler));
> > +      break;
> > +    }
> > +  }
> > +  return Status;
> > +}
> > +/**
> > +  Callback function executed when a Redfish Config Handler Protocol is
> > installed
> > +  by EDK2 Redfish Feature Drivers.
> > +
> > +**/
> > +VOID
> > +RedfishConfigHandlerInitialization (
> > +  VOID
> > +  )
> > +{
> > +  EFI_STATUS                            Status;
> > +  EFI_HANDLE                            *HandleBuffer;
> > +  UINTN                                 NumberOfHandles;
> > +  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
> > +  UINTN                                 Index;
> > +  UINT32                                Id;
> > +
> > +  Status = gBS->LocateHandleBuffer (
> > +                  ByProtocol,
> > +                  &gEdkIIRedfishConfigHandlerProtocolGuid,
> > +                  NULL,
> > +                  &NumberOfHandles,
> > +                  &HandleBuffer
> > +                  );
> > +  if (EFI_ERROR (Status)) {
> > +    return;
> > +  }
> > +
> > +  for (Index = 0; Index < NumberOfHandles; Index++) {
> > +    Status = gBS->HandleProtocol (
> > +                    HandleBuffer [Index],
> > +                    &gEfiCallerIdGuid,
> > +                    (VOID **) &Id
> > +                    );
> > +    if (!EFI_ERROR (Status)) {
> > +      continue;
> > +    }
> > +
> > +    Status = gBS->HandleProtocol (
> > +                     HandleBuffer [Index],
> > +                     &gEdkIIRedfishConfigHandlerProtocolGuid,
> > +                     (VOID**) &ConfigHandler
> > +                     );
> > +    ASSERT_EFI_ERROR (Status);
> > +    Status = ConfigHandler->Init (ConfigHandler,
> > &gRedfishConfigData.RedfishServiceInfo);
> > +    if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
> > +      DEBUG ((DEBUG_ERROR, "ERROR: Failed to init Redfish config
> > handler %p.\n", ConfigHandler));
> > +    }
> > +    //
> > +    // Install caller ID to indicate Redfish Configure Handler is
> initialized.
> > +    //
> > +    Status = gBS->InstallProtocolInterface (
> > +                  &HandleBuffer [Index],
> > +                  &gEfiCallerIdGuid,
> > +                  EFI_NATIVE_INTERFACE,
> > +                  (VOID *)&gRedfishConfigData.CallerId
> > +                  );
> > +    ASSERT_EFI_ERROR (Status);
> > +  }
> > +}
> > diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> > b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> > new file mode 100644
> > index 0000000000..51378dff4f
> > --- /dev/null
> > +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> > @@ -0,0 +1,587 @@
> > +/** @file
> > +  The UEFI driver model driver which is responsible for locating the
> > +  Redfish service through Redfish host interface and executing EDKII
> > +  Redfish feature drivers.
> > +
> > +  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> > +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> > +
> > +  SPDX-License-Identifier: BSD-2-Clause-Patent
> > +
> > +**/
> > +
> > +#include "RedfishConfigHandlerDriver.h"
> > +
> > +EFI_EVENT  gEfiRedfishDiscoverProtocolEvent = NULL;
> > +
> > +//
> > +// Variables for using RFI Redfish Discover Protocol
> > +//
> > +VOID                             *gEfiRedfishDiscoverRegistration;
> > +EFI_HANDLE
> > gEfiRedfishDiscoverControllerHandle = NULL;
> > +EFI_REDFISH_DISCOVER_PROTOCOL    *gEfiRedfishDiscoverProtocol =
> > NULL;
> > +BOOLEAN                          gRedfishDiscoverActivated =
> > FALSE;
> > +BOOLEAN                          gRedfishServiceDiscovered =
> > FALSE;
> > +//
> > +// Network interfaces discovered by EFI Redfish Discover Protocol.
> > +//
> > +UINTN
> > gNumberOfNetworkInterfaces;
> > +EFI_REDFISH_DISCOVER_NETWORK_INTERFACE
> > *gNetworkInterfaceInstances = NULL;
> > +EFI_REDFISH_DISCOVERED_TOKEN
> > *gRedfishDiscoveredToken = NULL;
> > +
> > +///
> > +/// Driver Binding Protocol instance
> > +///
> > +EFI_DRIVER_BINDING_PROTOCOL gRedfishConfigDriverBinding = {
> > +  RedfishConfigDriverBindingSupported,
> > +  RedfishConfigDriverBindingStart,
> > +  RedfishConfigDriverBindingStop,
> > +  REDFISH_CONFIG_VERSION,
> > +  NULL,
> > +  NULL
> > +};
> > +
> > +/**
> > +  Stop acquiring Redfish service.
> > +
> > +**/
> > +VOID
> > +RedfishConfigStopRedfishDiscovery (
> > +  VOID
> > +)
> > +{
> > +  if (gRedfishDiscoverActivated) {
> > +    //
> > +    // No more EFI Discover Protocol.
> > +    //
> > +    if (gEfiRedfishDiscoverProtocolEvent != NULL) {
> > +      gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> > +    }
> > +    //
> > +    // Stop Redfish service discovery.
> > +    //
> > +    gEfiRedfishDiscoverProtocol->AbortAcquireRedfishService (
> > +                                   gEfiRedfishDiscoverProtocol,
> > +                                   gNetworkInterfaceInstances
> > +                                   );
> > +    gEfiRedfishDiscoverControllerHandle = NULL;
> > +    gEfiRedfishDiscoverProtocol = NULL;
> > +    gRedfishDiscoverActivated = FALSE;
> > +    gRedfishServiceDiscovered = FALSE;
> > +  }
> > +}
> > +
> > +/**
> > +  Callback function executed when a Redfish Config Handler Protocol is
> > installed.
> > +
> > +  @param[in]  Event    Event whose notification function is being
> > invoked.
> > +  @param[in]  Context  Pointer to the REDFISH_CONFIG_DRIVER_DATA
> > buffer.
> > +
> > +**/
> > +VOID
> > +EFIAPI
> > +RedfishConfigHandlerInstalledCallback (
> > +  IN EFI_EVENT  Event,
> > +  IN VOID       *Context
> > +  )
> > +{
> > +  if (!gRedfishDiscoverActivated) {
> > +    //
> > +    // No Redfish service is discovered yet.
> > +    //
> > +    return;
> > +  }
> > +
> > +  RedfishConfigHandlerInitialization ();
> > +}
> > +
> > +/**
> > +  Tests to see if this driver supports a given controller. If a child
> device is
> > provided,
> > +  it further tests to see if this driver supports creating a handle for
> the
> > specified child device.
> > +
> > +  This function checks to see if the driver specified by This supports
> the
> > device specified by
> > +  ControllerHandle. Drivers will typically use the device path attached
> to
> > +  ControllerHandle and/or the services from the bus I/O abstraction
> > attached to
> > +  ControllerHandle to determine if the driver supports ControllerHandle.
> > This function
> > +  may be called many times during platform initialization. In order to
> reduce
> > boot times, the tests
> > +  performed by this function must be very small, and take as little time
> as
> > possible to execute. This
> > +  function must not change the state of any hardware devices, and this
> > function must be aware that the
> > +  device specified by ControllerHandle may already be managed by the
> > same driver or a
> > +  different driver. This function must match its calls to AllocatePages()
> with
> > FreePages(),
> > +  AllocatePool() with FreePool(), and OpenProtocol() with
> CloseProtocol().
> > +  Because ControllerHandle may have been previously started by the
> same
> > driver, if a protocol is
> > +  already in the opened state, then it must not be closed with
> > CloseProtocol(). This is required
> > +  to guarantee the state of ControllerHandle is not modified by this
> > function.
> > +
> > +  @param[in]  This                 A pointer to the
> > EFI_DRIVER_BINDING_PROTOCOL instance.
> > +  @param[in]  ControllerHandle     The handle of the controller to test.
> > This handle
> > +                                   must support a protocol
> > interface that supplies
> > +                                   an I/O abstraction to the driver.
> > +  @param[in]  RemainingDevicePath  A pointer to the remaining portion
> > of a device path.  This
> > +                                   parameter is ignored by device
> > drivers, and is optional for bus
> > +                                   drivers. For bus drivers, if this
> > parameter is not NULL, then
> > +                                   the bus driver must determine if
> > the bus controller specified
> > +                                   by ControllerHandle and the
> > child controller specified
> > +                                   by RemainingDevicePath are
> > both supported by this
> > +                                   bus driver.
> > +
> > +  @retval EFI_SUCCESS              The device specified by
> > ControllerHandle and
> > +                                   RemainingDevicePath is
> > supported by the driver specified by This.
> > +  @retval EFI_UNSUPPORTED          The device specified by
> > ControllerHandle and
> > +                                   RemainingDevicePath is not
> > supported by the driver specified by This.
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +RedfishConfigDriverBindingSupported (
> > +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> > +  IN EFI_HANDLE                   ControllerHandle,
> > +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> > +  )
> > +{
> > +  EFI_REST_EX_PROTOCOL             *RestEx;
> > +  EFI_STATUS                       Status;
> > +  EFI_HANDLE                       ChildHandle;
> > +
> > +  ChildHandle = NULL;
> > +
> > +  //
> > +  // Check if REST EX is ready. This just makes sure
> > +  // the network stack is brought up.
> > +  //
> > +  Status = NetLibCreateServiceChild (
> > +             ControllerHandle,
> > +             This->ImageHandle,
> > +             &gEfiRestExServiceBindingProtocolGuid,
> > +             &ChildHandle
> > +             );
> > +  if (EFI_ERROR (Status)) {
> > +    return EFI_UNSUPPORTED;
> > +  }
> > +
> > +  //
> > +  // Test if REST EX protocol is ready.
> > +  //
> > +  Status = gBS->OpenProtocol(
> > +                  ChildHandle,
> > +                  &gEfiRestExProtocolGuid,
> > +                  (VOID**) &RestEx,
> > +                  This->DriverBindingHandle,
> > +                  ControllerHandle,
> > +                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
> > +                  );
> > +  if (EFI_ERROR (Status)) {
> > +    Status = EFI_UNSUPPORTED;
> > +  }
> > +  NetLibDestroyServiceChild (
> > +    ControllerHandle,
> > +    This->ImageHandle,
> > +    &gEfiRestExServiceBindingProtocolGuid,
> > +    ChildHandle
> > +    );
> > +  return Status;
> > +}
> > +
> > +/**
> > +  Starts a device controller or a bus controller.
> > +
> > +  The Start() function is designed to be invoked from the EFI boot
> service
> > ConnectController().
> > +  As a result, much of the error checking on the parameters to Start()
> has
> > been moved into this
> > +  common boot service. It is legal to call Start() from other locations,
> > +  but the following calling restrictions must be followed, or the system
> > behavior will not be deterministic.
> > +  1. ControllerHandle must be a valid EFI_HANDLE.
> > +  2. If RemainingDevicePath is not NULL, then it must be a pointer to a
> > naturally aligned
> > +     EFI_DEVICE_PATH_PROTOCOL.
> > +  3. Prior to calling Start(), the Supported() function for the driver
> specified
> > by This must
> > +     have been called with the same calling parameters, and Supported()
> > must have returned EFI_SUCCESS.
> > +
> > +  @param[in]  This                 A pointer to the
> > EFI_DRIVER_BINDING_PROTOCOL instance.
> > +  @param[in]  ControllerHandle     The handle of the controller to start.
> > This handle
> > +                                   must support a protocol
> > interface that supplies
> > +                                   an I/O abstraction to the driver.
> > +  @param[in]  RemainingDevicePath  A pointer to the remaining portion
> > of a device path.  This
> > +                                   parameter is ignored by device
> > drivers, and is optional for bus
> > +                                   drivers. For a bus driver, if this
> > parameter is NULL, then handles
> > +                                   for all the children of Controller
> > are created by this driver.
> > +                                   If this parameter is not NULL
> > and the first Device Path Node is
> > +                                   not the End of Device Path Node,
> > then only the handle for the
> > +                                   child device specified by the first
> > Device Path Node of
> > +                                   RemainingDevicePath is created
> > by this driver.
> > +                                   If the first Device Path Node of
> > RemainingDevicePath is
> > +                                   the End of Device Path Node, no
> > child handle is created by this
> > +                                   driver.
> > +
> > +  @retval EFI_SUCCESS              The driver is started.
> > +  @retval EFI_ALREADY_STARTED      The driver was already started.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +RedfishConfigDriverBindingStart (
> > +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> > +  IN EFI_HANDLE                   ControllerHandle,
> > +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> > +  )
> > +{
> > +  VOID *ConfigHandlerRegistration;
> > +
> > +  if (gRedfishConfigData.Event != NULL) {
> > +    return EFI_ALREADY_STARTED;
> > +  }
> > +
> > +  gRedfishConfigData.Event = EfiCreateProtocolNotifyEvent (
> > +
> > &gEdkIIRedfishConfigHandlerProtocolGuid,
> > +                                TPL_CALLBACK,
> > +
> > RedfishConfigHandlerInstalledCallback,
> > +                                (VOID *)&gRedfishConfigData,
> > +                                &ConfigHandlerRegistration
> > +                                );
> > +  return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > +  Stops a device controller or a bus controller.
> > +
> > +  The Stop() function is designed to be invoked from the EFI boot service
> > DisconnectController().
> > +  As a result, much of the error checking on the parameters to Stop() has
> > been moved
> > +  into this common boot service. It is legal to call Stop() from other
> locations,
> > +  but the following calling restrictions must be followed, or the system
> > behavior will not be deterministic.
> > +  1. ControllerHandle must be a valid EFI_HANDLE that was used on a
> > previous call to this
> > +     same driver's Start() function.
> > +  2. The first NumberOfChildren handles of ChildHandleBuffer must all be
> a
> > valid
> > +     EFI_HANDLE. In addition, all of these handles must have been created
> > in this driver's
> > +     Start() function, and the Start() function must have called
> > OpenProtocol() on
> > +     ControllerHandle with an Attribute of
> > EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
> > +
> > +  @param[in]  This              A pointer to the
> > EFI_DRIVER_BINDING_PROTOCOL instance.
> > +  @param[in]  ControllerHandle  A handle to the device being stopped.
> > The handle must
> > +                                support a bus specific I/O protocol
> > for the driver
> > +                                to use to stop the device.
> > +  @param[in]  NumberOfChildren  The number of child device handles in
> > ChildHandleBuffer.
> > +  @param[in]  ChildHandleBuffer An array of child handles to be freed.
> > May be NULL
> > +                                if NumberOfChildren is 0.
> > +
> > +  @retval EFI_SUCCESS           The device was stopped.
> > +  @retval EFI_DEVICE_ERROR      The device could not be stopped due
> > to a device error.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +RedfishConfigDriverBindingStop (
> > +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> > +  IN EFI_HANDLE                   ControllerHandle,
> > +  IN UINTN                        NumberOfChildren,
> > +  IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL
> > +  )
> > +{
> > +  EFI_STATUS  Status;
> > +
> > +  if (ControllerHandle == gEfiRedfishDiscoverControllerHandle) {
> > +    RedfishConfigStopRedfishDiscovery ();
> > +  }
> > +  gBS->CloseProtocol (
> > +         ControllerHandle,
> > +         &gEfiRedfishDiscoverProtocolGuid,
> > +         gRedfishConfigData.Image,
> > +         gRedfishConfigData.Image
> > +         );
> > +
> > +  Status = RedfishConfigCommonStop ();
> > +  if (EFI_ERROR (Status)) {
> > +    return EFI_DEVICE_ERROR;
> > +  }
> > +
> > +  if (gRedfishConfigData.Event != NULL) {
> > +    gBS->CloseEvent (gRedfishConfigData.Event);
> > +    gRedfishConfigData.Event = NULL;
> > +  }
> > +  return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > +  Callback function when Redfish service is discovered.
> > +
> > +  @param[in]   Event    Event whose notification function is being
> > invoked.
> > +  @param[out]  Context  Pointer to the Context buffer
> > +
> > +**/
> > +VOID
> > +EFIAPI
> > +RedfishServiceDiscoveredCallback (
> > +  IN  EFI_EVENT  Event,
> > +  OUT VOID       *Context
> > +  )
> > +{
> > +  EFI_REDFISH_DISCOVERED_TOKEN *RedfishDiscoveredToken;
> > +  EFI_REDFISH_DISCOVERED_INSTANCE *RedfishInstance;
> > +
> > +  if (gRedfishServiceDiscovered) {
> > +    //
> > +    // Only support one Redfish service on platform.
> > +    //
> > +    return;
> > +  }
> > +
> > +  RedfishDiscoveredToken = (EFI_REDFISH_DISCOVERED_TOKEN
> *)Context;
> > +  RedfishInstance =
> > RedfishDiscoveredToken->DiscoverList.RedfishInstances;
> > +  //
> > +  // Only pick up the first found Redfish service.
> > +  //
> > +  if (RedfishInstance->Status == EFI_SUCCESS) {
> > +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceRestExHandle =
> > RedfishInstance->Information.RedfishRestExHandle;
> > +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceVersion      =
> > RedfishInstance->Information.RedfishVersion;
> > +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceLocation     =
> > RedfishInstance->Information.Location;
> > +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUuid         =
> > RedfishInstance->Information.Uuid;
> > +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOs           =
> > RedfishInstance->Information.Os;
> > +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOsVersion    =
> > RedfishInstance->Information.OsVersion;
> > +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProduct      =
> > RedfishInstance->Information.Product;
> > +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProductVer   =
> > RedfishInstance->Information.ProductVer;
> > +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUseHttps     =
> > RedfishInstance->Information.UseHttps;
> > +    gRedfishServiceDiscovered = TRUE;
> > +  }
> > +
> > +  //
> > +  // Invoke RedfishConfigHandlerInstalledCallback to execute
> > +  // the initialization of Redfish Configure Handler instance.
> > +  //
> > +  RedfishConfigHandlerInstalledCallback (gRedfishConfigData.Event,
> > &gRedfishConfigData);
> > +}
> > +
> > +/**
> > +  Callback function executed when the
> EFI_REDFISH_DISCOVER_PROTOCOL
> > +  protocol interface is installed.
> > +
> > +  @param[in]   Event    Event whose notification function is being
> > invoked.
> > +  @param[out]  Context  Pointer to the Context buffer
> > +
> > +**/
> > +VOID
> > +EFIAPI
> > +RedfishDiscoverProtocolInstalled (
> > +  IN  EFI_EVENT  Event,
> > +  OUT VOID       *Context
> > +  )
> > +{
> > +  EFI_STATUS Status;
> > +  UINTN BufferSize;
> > +  EFI_HANDLE HandleBuffer;
> > +  UINTN NetworkInterfaceIndex;
> > +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE *ThisNetworkInterface;
> > +  EFI_REDFISH_DISCOVERED_TOKEN
> > *ThisRedfishDiscoveredToken;
> > +
> > +  DEBUG((DEBUG_INFO, "%a: New network interface is installed on
> system
> > by EFI Redfish discover driver.\n", __FUNCTION__));
> > +
> > +  BufferSize = sizeof (EFI_HANDLE);
> > +  Status = gBS->LocateHandle (
> > +                  ByRegisterNotify,
> > +                  NULL,
> > +                  gEfiRedfishDiscoverRegistration,
> > +                  &BufferSize,
> > +                  &HandleBuffer
> > +                );
> > +  if (EFI_ERROR (Status)) {
> > +    DEBUG((DEBUG_ERROR, "%a: Can't locate handle with
> > EFI_REDFISH_DISCOVER_PROTOCOL installed.\n", __FUNCTION__));
> > +  }
> > +  gRedfishDiscoverActivated = TRUE;
> > +  if (gEfiRedfishDiscoverProtocol == NULL) {
> > +     gEfiRedfishDiscoverControllerHandle = HandleBuffer;
> > +    //
> > +    // First time to open EFI_REDFISH_DISCOVER_PROTOCOL.
> > +    //
> > +    Status = gBS->OpenProtocol(
> > +                      gEfiRedfishDiscoverControllerHandle,
> > +                      &gEfiRedfishDiscoverProtocolGuid,
> > +                      (VOID **)&gEfiRedfishDiscoverProtocol,
> > +                      gRedfishConfigData.Image,
> > +                      gRedfishConfigData.Image,
> > +                      EFI_OPEN_PROTOCOL_BY_DRIVER
> > +                    );
> > +    if (EFI_ERROR (Status)) {
> > +      gEfiRedfishDiscoverProtocol = NULL;
> > +      gRedfishDiscoverActivated = FALSE;
> > +      DEBUG((DEBUG_ERROR, "%a: Can't locate
> > EFI_REDFISH_DISCOVER_PROTOCOL.\n", __FUNCTION__));
> > +      return;
> > +    }
> > +  }
> > +  //
> > +  // Check the new found network interface.
> > +  //
> > +  if (gNetworkInterfaceInstances != NULL) {
> > +    FreePool (gNetworkInterfaceInstances);
> > +  }
> > +  Status = gEfiRedfishDiscoverProtocol->GetNetworkInterfaceList(
> > +
> > gEfiRedfishDiscoverProtocol,
> > +
> > gRedfishConfigData.Image,
> > +
> > &gNumberOfNetworkInterfaces,
> > +
> > &gNetworkInterfaceInstances
> > +                                          );
> > +  if (EFI_ERROR (Status) || gNumberOfNetworkInterfaces == 0) {
> > +    DEBUG((DEBUG_ERROR, "%a: No network interfaces found on the
> > handle.\n", __FUNCTION__));
> > +    return;
> > +  }
> > +
> > +  gRedfishDiscoveredToken = AllocateZeroPool
> > (gNumberOfNetworkInterfaces * sizeof
> > (EFI_REDFISH_DISCOVERED_TOKEN));
> > +  if (gRedfishDiscoveredToken == NULL) {
> > +    DEBUG((DEBUG_ERROR, "%a: Not enough memory for
> > EFI_REDFISH_DISCOVERED_TOKEN.\n", __FUNCTION__));
> > +    return;
> > +  }
> > +
> > +  ThisNetworkInterface = gNetworkInterfaceInstances;
> > +  ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
> > +  //
> > +  // Loop to discover Redfish service on each network interface.
> > +  //
> > +  for (NetworkInterfaceIndex = 0; NetworkInterfaceIndex <
> > gNumberOfNetworkInterfaces; NetworkInterfaceIndex ++) {
> > +    //
> > +    // Initial this Redfish Discovered Token
> > +    //
> > +    Status = gBS->CreateEvent (
> > +                    EVT_NOTIFY_SIGNAL,
> > +                    TPL_CALLBACK,
> > +                    RedfishServiceDiscoveredCallback,
> > +                    (VOID *)ThisRedfishDiscoveredToken,
> > +                    &ThisRedfishDiscoveredToken->Event
> > +                  );
> > +    if (EFI_ERROR (Status)) {
> > +      DEBUG((DEBUG_ERROR, "%a: Failed to create event for Redfish
> > discovered token.\n", __FUNCTION__));
> > +      goto ErrorReturn;
> > +    }
> > +    ThisRedfishDiscoveredToken->Signature =
> > REDFISH_DISCOVER_TOKEN_SIGNATURE;
> > +    ThisRedfishDiscoveredToken->DiscoverList.NumberOfServiceFound = 0;
> > +    ThisRedfishDiscoveredToken->DiscoverList.RedfishInstances = NULL;
> > +    //
> > +    // Acquire for Redfish service which is reported by
> > +    // Redfish Host Interface.
> > +    //
> > +    Status = gEfiRedfishDiscoverProtocol->AcquireRedfishService(
> > +
> > gEfiRedfishDiscoverProtocol,
> > +
> > gRedfishConfigData.Image,
> > +
> > ThisNetworkInterface,
> > +
> > EFI_REDFISH_DISCOVER_HOST_INTERFACE,
> > +
> > ThisRedfishDiscoveredToken
> > +                                             );
> > +    ThisNetworkInterface ++;
> > +    ThisRedfishDiscoveredToken ++;
> > +  }
> > +  if (EFI_ERROR (Status)) {
> > +    DEBUG((DEBUG_ERROR, "%a: Acquire Redfish service fail.\n",
> > __FUNCTION__));
> > +    goto ErrorReturn;
> > +  }
> > +  return;
> > +
> > +ErrorReturn:
> > +  if (gRedfishDiscoveredToken != NULL) {
> > +    FreePool(gRedfishDiscoveredToken);
> > +  }
> > +}
> > +
> > +/**
> > +  Unloads an image.
> > +
> > +  @param[in]  ImageHandle       Handle that identifies the image to
> > be unloaded.
> > +
> > +  @retval EFI_SUCCESS           The image has been unloaded.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +RedfishConfigHandlerDriverUnload (
> > +  IN EFI_HANDLE  ImageHandle
> > +  )
> > +{
> > +  EFI_REDFISH_DISCOVERED_TOKEN *ThisRedfishDiscoveredToken;
> > +  UINTN NumberOfNetworkInterfacesIndex;
> > +
> > +  RedfishConfigDriverCommonUnload (ImageHandle);
> > +
> > +  RedfishConfigStopRedfishDiscovery ();
> > +  if (gRedfishDiscoveredToken != NULL) {
> > +    ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
> > +    for (NumberOfNetworkInterfacesIndex = 0;
> > NumberOfNetworkInterfacesIndex < gNumberOfNetworkInterfaces;
> > NumberOfNetworkInterfacesIndex ++) {
> > +      if (ThisRedfishDiscoveredToken->Event != NULL) {
> > +        gBS->CloseEvent (ThisRedfishDiscoveredToken->Event);
> > +      }
> > +      FreePool (ThisRedfishDiscoveredToken);
> > +      ThisRedfishDiscoveredToken ++;
> > +    }
> > +    gRedfishDiscoveredToken = NULL;
> > +  }
> > +  return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > +  This is the declaration of an EFI image entry point. This entry point
> is
> > +  the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers
> > including
> > +  both device drivers and bus drivers.
> > +
> > +  @param[in]  ImageHandle       The firmware allocated handle for
> > the UEFI image.
> > +  @param[in]  SystemTable       A pointer to the EFI System Table.
> > +
> > +  @retval EFI_SUCCESS           The operation completed successfully.
> > +  @retval Others                An unexpected error occurred.
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +RedfishConfigHandlerDriverEntryPoint (
> > +  IN EFI_HANDLE        ImageHandle,
> > +  IN EFI_SYSTEM_TABLE  *SystemTable
> > +  )
> > +{
> > +  EFI_STATUS    Status;
> > +
> > +  ZeroMem ((VOID *)&gRedfishConfigData, sizeof
> > (REDFISH_CONFIG_DRIVER_DATA));
> > +  gRedfishConfigData.Image = ImageHandle;
> > +  //
> > +  // Register event for EFI_REDFISH_DISCOVER_PROTOCOL protocol install
> > +  // notification.
> > +  //
> > +  Status = gBS->CreateEventEx (
> > +                  EVT_NOTIFY_SIGNAL,
> > +                  TPL_CALLBACK,
> > +                  RedfishDiscoverProtocolInstalled,
> > +                  NULL,
> > +                  &gEfiRedfishDiscoverProtocolGuid,
> > +                  &gEfiRedfishDiscoverProtocolEvent
> > +                  );
> > +  if (EFI_ERROR (Status)) {
> > +    DEBUG ((DEBUG_ERROR, "%a: Fail to create event for the installation
> > of EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
> > +    return Status;
> > +  }
> > +  Status = gBS->RegisterProtocolNotify (
> > +                  &gEfiRedfishDiscoverProtocolGuid,
> > +                  gEfiRedfishDiscoverProtocolEvent,
> > +                  &gEfiRedfishDiscoverRegistration
> > +                );
> > +  if (EFI_ERROR (Status)) {
> > +    DEBUG ((DEBUG_ERROR, "%a: Fail to register event for the installation
> > of EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
> > +    return Status;
> > +  }
> > +
> > +  Status = RedfishConfigCommonInit (ImageHandle, SystemTable);
> > +  if (EFI_ERROR (Status)) {
> > +    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> > +    gEfiRedfishDiscoverProtocolEvent = NULL;
> > +    return Status;
> > +  }
> > +
> > +  //
> > +  // Install UEFI Driver Model protocol(s).
> > +  //
> > +  Status = EfiLibInstallDriverBinding (
> > +             ImageHandle,
> > +             SystemTable,
> > +             &gRedfishConfigDriverBinding,
> > +             ImageHandle
> > +             );
> > +  if (EFI_ERROR (Status)) {
> > +    gBS->CloseEvent (gEndOfDxeEvent);
> > +    gEndOfDxeEvent = NULL;
> > +    gBS->CloseEvent (gExitBootServiceEvent);
> > +    gExitBootServiceEvent = NULL;
> > +    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> > +    gEfiRedfishDiscoverProtocolEvent = NULL;
> > +    DEBUG ((DEBUG_ERROR, "%a: Fail to install EFI Binding Protocol of EFI
> > Redfish Config driver.", __FUNCTION__));
> > +    return Status;
> > +  }
> > +  return Status;
> > +}
> > +
> > --
> > 2.17.1
> >
> >
> >
> > 
> >
> 
> 



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Looks good to me. But for the copyright, I think it would be "2020-2021", right? For example:

-# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>

Thanks,
Nickle

-----Original Message-----
From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Abner Chang
Sent: Friday, March 26, 2021 1:55 PM
To: devel@edk2.groups.io
Cc: Wang, Nickle (HPS SW) <nickle.wang@hpe.com>
Subject: [edk2-devel] [PATCH] RedfishPkg/RedfishConfigHandler: EDKII RedfishConfigHandler Protocol

The driver is used to manage EDK2 Redfish Configuration Handler
Protocol installed by EDK2 Redfish feature drivers.
This is the EDK2 Redfish client driver written based on the EDK2
Redfish foundation to initialize EDK2 Redfish feature drivers.

EDK2 Redfish feature drivers are used to provision/consume/update
the firmware owns Redfish properties during system power on
initialization.

RedfishConfigHandlerCommon.c has the common code for the driver
instances used in different EDK2 boot phases or used by different
driver models in the future contribution.

Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
Signed-off-by: Siyuan Fu <siyuan.fu@intel.com>
Signed-off-by: Fan Wang <fan.wang@intel.com>
Signed-off-by: Abner Chang <abner.chang@hpe.com>

Cc: Nickle Wang <nickle.wang@hpe.com>
---
 RedfishPkg/RedfishComponents.dsc.inc          |   3 +-
 RedfishPkg/Redfish.fdf.inc                    |   3 +-
 .../RedfishConfigHandlerDriver.inf            |  60 ++
 .../RedfishConfigHandlerCommon.h              | 101 +++
 .../RedfishConfigHandlerDriver.h              | 159 +++++
 .../RedfishConfigHandlerCommon.c              | 265 ++++++++
 .../RedfishConfigHandlerDriver.c              | 587 ++++++++++++++++++
 7 files changed, 1176 insertions(+), 2 deletions(-)
 create mode 100644 RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
 create mode 100644 RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
 create mode 100644 RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
 create mode 100644 RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
 create mode 100644 RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c

diff --git a/RedfishPkg/RedfishComponents.dsc.inc b/RedfishPkg/RedfishComponents.dsc.inc
index 08f1d3bc32..d0116f065c 100644
--- a/RedfishPkg/RedfishComponents.dsc.inc
+++ b/RedfishPkg/RedfishComponents.dsc.inc
@@ -6,7 +6,7 @@
 # of EDKII Redfish drivers according to the value of flags described in
 # "RedfishDefines.dsc.inc".
 #
-# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
 #
 #    SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -17,4 +17,5 @@
   RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
   RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
   RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
+  RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
 !endif
diff --git a/RedfishPkg/Redfish.fdf.inc b/RedfishPkg/Redfish.fdf.inc
index a64fd119a9..9673246b3f 100644
--- a/RedfishPkg/Redfish.fdf.inc
+++ b/RedfishPkg/Redfish.fdf.inc
@@ -5,7 +5,7 @@
 # by using "!include RedfishPkg/RedfisLibs.fdf.inc" to specify the module instances
 # to be built in the firmware volume.
 #
-# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
 #
 #    SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -15,4 +15,5 @@
   INF RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
   INF RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
   INF RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
+  INF RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
 !endif
diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
new file mode 100644
index 0000000000..def91c7531
--- /dev/null
+++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
@@ -0,0 +1,60 @@
+## @file
+#  INF file for the UEFI driver model Redfish Configuration Handler
+#  Driver.
+#
+#  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+#  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION               = 0x0001000b
+  BASE_NAME                 = RedfishConfigHandlerDriver
+  FILE_GUID                 = 6e881000-5749-11e8-9bf0-8cdcd426c973
+  MODULE_TYPE               = UEFI_DRIVER
+  VERSION_STRING            = 1.0
+  ENTRY_POINT               = RedfishConfigHandlerDriverEntryPoint
+  UNLOAD_IMAGE              = RedfishConfigHandlerDriverUnload
+
+#
+#  VALID_ARCHITECTURES      = IA32 X64 ARM AARCH64 RISCV64
+#
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  NetworkPkg/NetworkPkg.dec
+  RedfishPkg/RedfishPkg.dec
+
+[Sources]
+  RedfishConfigHandlerDriver.h
+  RedfishConfigHandlerDriver.c
+  RedfishConfigHandlerCommon.h
+  RedfishConfigHandlerCommon.c
+
+[LibraryClasses]
+  BaseLib
+  BaseMemoryLib
+  DebugLib
+  UefiLib
+  MemoryAllocationLib
+  NetLib
+  UefiBootServicesTableLib
+  UefiDriverEntryPoint
+
+[Protocols]
+  gEfiRedfishDiscoverProtocolGuid         ## CONSUMES
+  gEfiRestExServiceBindingProtocolGuid
+  gEfiRestExProtocolGuid                  ## CONSUMES
+  gEdkIIRedfishCredentialProtocolGuid     ## CONSUMES
+  gEdkIIRedfishConfigHandlerProtocolGuid  ## CONSUMES
+
+[Guids]
+  gEfiEventExitBootServicesGuid           ## CONSUMES ## Event
+  gEfiEndOfDxeEventGroupGuid              ## CONSUMES ## Event
+
+[Depex]
+  TRUE
+
diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
new file mode 100644
index 0000000000..5e46c42219
--- /dev/null
+++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
@@ -0,0 +1,101 @@
+/** @file
+  Common Header file for Redfish Configuration Handler UEFI driver
+  and DXE driver.
+
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
+#define EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
+
+#include <Uefi.h>
+
+//
+// Libraries
+//
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/NetLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/UefiLib.h>
+
+//
+// Consumed Protocols
+//
+#include <Protocol/EdkIIRedfishCredential.h>
+#include <Protocol/EdkIIRedfishConfigHandler.h>
+
+//
+// Driver Version
+//
+#define REDFISH_CONFIG_VERSION  0x00000001
+
+///
+///  Internal structure used by Redfish Config DXE driver.
+///
+typedef struct {
+  UINT32        CallerId;  ///< Caller ID used to indicate Redfish Config Handler
+                           ///< has been initiated
+  EFI_HANDLE    Image;     ///< Image handle of Redfish Config Driver
+  EFI_EVENT     Event;     ///< Event for the notification of EFI_REDFISH_CONFIG_HANDLER_PROTOCOL
+  REDFISH_CONFIG_SERVICE_INFORMATION RedfishServiceInfo; /// Redfish Service information discovered
+} REDFISH_CONFIG_DRIVER_DATA;
+
+/**
+  Common code of unloading image for both UEFI/DXE Redfish Configuration drivers.
+
+  @param[in]  ImageHandle       Handle that identifies the image to be unloaded.
+
+  @retval EFI_SUCCESS           The image has been unloaded.
+
+**/
+EFI_STATUS
+RedfishConfigDriverCommonUnload (
+  IN EFI_HANDLE  ImageHandle
+  );
+
+/**
+  This is the common code for Redfish configuration UEFI and DXE driver
+  initialization.
+
+  @param[in]  ImageHandle       The firmware allocated handle for the UEFI image.
+  @param[in]  SystemTable       A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS           The operation completed successfully.
+  @retval Others                An unexpected error occurred.
+**/
+EFI_STATUS
+RedfishConfigCommonInit (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  );
+
+/**
+  This is the common code to stop EDK2 Redfish feature driver.
+
+  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
+                         stopped.
+  @retval Others         An unexpected error occurred.
+**/
+EFI_STATUS
+RedfishConfigCommonStop (
+  VOID
+);
+
+/**
+  Callback function executed when a Redfish Config Handler Protocol is installed
+  by EDK2 Redfish Feature Drivers.
+
+**/
+VOID
+RedfishConfigHandlerInitialization (
+  VOID
+  );
+
+#endif
diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
new file mode 100644
index 0000000000..58202c41e2
--- /dev/null
+++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
@@ -0,0 +1,159 @@
+/** @file
+  Header file of Redfish Configuration Handler UEFI driver.
+
+  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
+#define EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
+
+#include "RedfishConfigHandlerCommon.h"
+
+//
+// UEFI Driver Model Protocols
+//
+
+#include <Protocol/DriverBinding.h>
+#include <Protocol/RedfishDiscover.h>
+#include <Protocol/RestEx.h>
+
+//
+// Protocol instances
+//
+extern EFI_DRIVER_BINDING_PROTOCOL  gRedfishConfigDriverBinding;
+
+extern REDFISH_CONFIG_DRIVER_DATA        gRedfishConfigData;
+extern EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential;
+extern EFI_EVENT                         gEndOfDxeEvent;
+extern EFI_EVENT                         gExitBootServiceEvent;
+
+/**
+  Tests to see if this driver supports a given controller. If a child device is provided,
+  it further tests to see if this driver supports creating a handle for the specified child device.
+
+  This function checks to see if the driver specified by This supports the device specified by
+  ControllerHandle. Drivers will typically use the device path attached to
+  ControllerHandle and/or the services from the bus I/O abstraction attached to
+  ControllerHandle to determine if the driver supports ControllerHandle. This function
+  may be called many times during platform initialization. In order to reduce boot times, the tests
+  performed by this function must be very small, and take as little time as possible to execute. This
+  function must not change the state of any hardware devices, and this function must be aware that the
+  device specified by ControllerHandle may already be managed by the same driver or a
+  different driver. This function must match its calls to AllocatePages() with FreePages(),
+  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+  Because ControllerHandle may have been previously started by the same driver, if a protocol is
+  already in the opened state, then it must not be closed with CloseProtocol(). This is required
+  to guarantee the state of ControllerHandle is not modified by this function.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to test. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For bus drivers, if this parameter is not NULL, then
+                                   the bus driver must determine if the bus controller specified
+                                   by ControllerHandle and the child controller specified
+                                   by RemainingDevicePath are both supported by this
+                                   bus driver.
+
+  @retval EFI_SUCCESS              The device specified by ControllerHandle and
+                                   RemainingDevicePath is supported by the driver specified by This.
+  @retval EFI_ALREADY_STARTED      The device specified by ControllerHandle and
+                                   RemainingDevicePath is already being managed by the driver
+                                   specified by This.
+  @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle and
+                                   RemainingDevicePath is already being managed by a different
+                                   driver or an application that requires exclusive access.
+                                   Currently not implemented.
+  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and
+                                   RemainingDevicePath is not supported by the driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingSupported (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   ControllerHandle,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
+  );
+
+/**
+  Starts a device controller or a bus controller.
+
+  The Start() function is designed to be invoked from the EFI boot service ConnectController().
+  As a result, much of the error checking on the parameters to Start() has been moved into this
+  common boot service. It is legal to call Start() from other locations,
+  but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE.
+  2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
+     EFI_DEVICE_PATH_PROTOCOL.
+  3. Prior to calling Start(), the Supported() function for the driver specified by This must
+     have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to start. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For a bus driver, if this parameter is NULL, then handles
+                                   for all the children of Controller are created by this driver.
+                                   If this parameter is not NULL and the first Device Path Node is
+                                   not the End of Device Path Node, then only the handle for the
+                                   child device specified by the first Device Path Node of
+                                   RemainingDevicePath is created by this driver.
+                                   If the first Device Path Node of RemainingDevicePath is
+                                   the End of Device Path Node, no child handle is created by this
+                                   driver.
+
+  @retval EFI_SUCCESS              The driver is started.
+  @retval EFI_ALREADY_STARTED      The driver was already started.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingStart (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   ControllerHandle,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
+  );
+
+/**
+  Stops a device controller or a bus controller.
+
+  The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
+  As a result, much of the error checking on the parameters to Stop() has been moved
+  into this common boot service. It is legal to call Stop() from other locations,
+  but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
+     same driver's Start() function.
+  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
+     EFI_HANDLE. In addition, all of these handles must have been created in this driver's
+     Start() function, and the Start() function must have called OpenProtocol() on
+     ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
+
+  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle  A handle to the device being stopped. The handle must
+                                support a bus specific I/O protocol for the driver
+                                to use to stop the device.
+  @param[in]  NumberOfChildren  The number of child device handles in ChildHandleBuffer.
+  @param[in]  ChildHandleBuffer An array of child handles to be freed. May be NULL
+                                if NumberOfChildren is 0.
+
+  @retval EFI_SUCCESS           The device was stopped.
+  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a device error.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingStop (
+  IN  EFI_DRIVER_BINDING_PROTOCOL *This,
+  IN  EFI_HANDLE                  ControllerHandle,
+  IN  UINTN                       NumberOfChildren,
+  IN  EFI_HANDLE                  *ChildHandleBuffer OPTIONAL
+  );
+#endif
diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
new file mode 100644
index 0000000000..ff465d9ff3
--- /dev/null
+++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
@@ -0,0 +1,265 @@
+/** @file
+  The common code of EDKII Redfish Configuration Handler driver.
+
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "RedfishConfigHandlerCommon.h"
+
+REDFISH_CONFIG_DRIVER_DATA      gRedfishConfigData; // Only one Redfish service supproted
+                                                    // on platform for the BIOS
+                                                    // Redfish configuration.
+EFI_EVENT  gEndOfDxeEvent = NULL;
+EFI_EVENT  gExitBootServiceEvent = NULL;
+EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential = NULL;
+
+/**
+  Callback function executed when the EndOfDxe event group is signaled.
+
+  @param[in]   Event    Event whose notification function is being invoked.
+  @param[out]  Context  Pointer to the Context buffer.
+
+**/
+VOID
+EFIAPI
+RedfishConfigOnEndOfDxe (
+  IN  EFI_EVENT  Event,
+  OUT VOID       *Context
+  )
+{
+  EFI_STATUS                          Status;
+
+  Status = gCredential->StopService (gCredential, ServiceStopTypeSecureBootDisabled);
+  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
+    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop service on EndOfDxe: %r", Status));
+  }
+
+  //
+  // Close event, so it will not be invoked again.
+  //
+  gBS->CloseEvent (gEndOfDxeEvent);
+  gEndOfDxeEvent = NULL;
+}
+
+/**
+  Callback function executed when the ExitBootService event group is signaled.
+
+  @param[in]   Event    Event whose notification function is being invoked.
+  @param[out]  Context  Pointer to the Context buffer
+
+**/
+VOID
+EFIAPI
+RedfishConfigOnExitBootService (
+  IN  EFI_EVENT  Event,
+  OUT VOID       *Context
+  )
+{
+  EFI_STATUS                          Status;
+
+  Status = gCredential->StopService (gCredential, ServiceStopTypeExitBootService);
+  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
+    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop service on ExitBootService: %r", Status));
+  }
+}
+
+/**
+  Unloads an image.
+
+  @param[in]  ImageHandle       Handle that identifies the image to be unloaded.
+
+  @retval EFI_SUCCESS           The image has been unloaded.
+
+**/
+EFI_STATUS
+RedfishConfigDriverCommonUnload (
+  IN EFI_HANDLE  ImageHandle
+  )
+{
+  if (gEndOfDxeEvent != NULL) {
+    gBS->CloseEvent (gEndOfDxeEvent);
+    gEndOfDxeEvent = NULL;
+  }
+
+  if (gExitBootServiceEvent != NULL) {
+    gBS->CloseEvent (gExitBootServiceEvent);
+    gExitBootServiceEvent = NULL;
+  }
+
+  if (gRedfishConfigData.Event != NULL) {
+    gBS->CloseEvent (gRedfishConfigData.Event);
+    gRedfishConfigData.Event = NULL;
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  This is the common code for Redfish configuration UEFI and DXE driver
+  initialization.
+
+  @param[in]  ImageHandle       The firmware allocated handle for the UEFI image.
+  @param[in]  SystemTable       A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS           The operation completed successfully.
+  @retval Others                An unexpected error occurred.
+**/
+EFI_STATUS
+RedfishConfigCommonInit (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS Status;
+  //
+  // Locate Redfish Credential Protocol to get credential for
+  // accessing to Redfish service.
+  //
+  Status = gBS->LocateProtocol (&gEdkIIRedfishCredentialProtocolGuid, NULL, (VOID **) &gCredential);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_INFO, "%a: No Redfish Credential Protocol is installed on system.", __FUNCTION__));
+    return Status;
+  }
+  //
+  // Create EndOfDxe Event.
+  //
+  Status = gBS->CreateEventEx (
+                  EVT_NOTIFY_SIGNAL,
+                  TPL_CALLBACK,
+                  RedfishConfigOnEndOfDxe,
+                  NULL,
+                  &gEfiEndOfDxeEventGroupGuid,
+                  &gEndOfDxeEvent
+                  );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "%a: Fail to register End Of DXE event.", __FUNCTION__));
+    return Status;
+  }
+  //
+  // Create Exit Boot Service event.
+  //
+  Status = gBS->CreateEventEx (
+                  EVT_NOTIFY_SIGNAL,
+                  TPL_CALLBACK,
+                  RedfishConfigOnExitBootService,
+                  NULL,
+                  &gEfiEventExitBootServicesGuid,
+                  &gExitBootServiceEvent
+                  );
+  if (EFI_ERROR (Status)) {
+    gBS->CloseEvent (gEndOfDxeEvent);
+    gEndOfDxeEvent = NULL;
+    DEBUG ((DEBUG_ERROR, "%a: Fail to register Exit Boot Service event.", __FUNCTION__));
+    return Status;
+  }
+  return EFI_SUCCESS;
+}
+/**
+  This is the common code to stop EDK2 Redfish feature driver.
+
+  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
+                         stopped.
+  @retval Others         An unexpected error occurred.
+**/
+EFI_STATUS
+RedfishConfigCommonStop (
+  VOID
+)
+{
+  EFI_STATUS   Status;
+  EFI_HANDLE  *HandleBuffer;
+  UINTN        NumberOfHandles;
+  UINTN        Index;
+  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
+
+  Status = gBS->LocateHandleBuffer (
+                  ByProtocol,
+                  &gEdkIIRedfishConfigHandlerProtocolGuid,
+                  NULL,
+                  &NumberOfHandles,
+                  &HandleBuffer
+                  );
+  if (EFI_ERROR (Status) && Status != EFI_NOT_FOUND) {
+    return Status;
+  }
+
+  Status = EFI_SUCCESS;
+  for (Index = 0; Index < NumberOfHandles; Index++) {
+    Status = gBS->HandleProtocol (
+                     HandleBuffer[Index],
+                     &gEdkIIRedfishConfigHandlerProtocolGuid,
+                     (VOID**) &ConfigHandler
+                     );
+    ASSERT_EFI_ERROR (Status);
+
+    Status = ConfigHandler->Stop (ConfigHandler);
+    if (EFI_ERROR (Status) && Status != EFI_UNSUPPORTED) {
+      DEBUG ((DEBUG_ERROR, "ERROR: Failed to stop Redfish config handler %p.\n", ConfigHandler));
+      break;
+    }
+  }
+  return Status;
+}
+/**
+  Callback function executed when a Redfish Config Handler Protocol is installed
+  by EDK2 Redfish Feature Drivers.
+
+**/
+VOID
+RedfishConfigHandlerInitialization (
+  VOID
+  )
+{
+  EFI_STATUS                            Status;
+  EFI_HANDLE                            *HandleBuffer;
+  UINTN                                 NumberOfHandles;
+  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
+  UINTN                                 Index;
+  UINT32                                Id;
+
+  Status = gBS->LocateHandleBuffer (
+                  ByProtocol,
+                  &gEdkIIRedfishConfigHandlerProtocolGuid,
+                  NULL,
+                  &NumberOfHandles,
+                  &HandleBuffer
+                  );
+  if (EFI_ERROR (Status)) {
+    return;
+  }
+
+  for (Index = 0; Index < NumberOfHandles; Index++) {
+    Status = gBS->HandleProtocol (
+                    HandleBuffer [Index],
+                    &gEfiCallerIdGuid,
+                    (VOID **) &Id
+                    );
+    if (!EFI_ERROR (Status)) {
+      continue;
+    }
+
+    Status = gBS->HandleProtocol (
+                     HandleBuffer [Index],
+                     &gEdkIIRedfishConfigHandlerProtocolGuid,
+                     (VOID**) &ConfigHandler
+                     );
+    ASSERT_EFI_ERROR (Status);
+    Status = ConfigHandler->Init (ConfigHandler, &gRedfishConfigData.RedfishServiceInfo);
+    if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
+      DEBUG ((DEBUG_ERROR, "ERROR: Failed to init Redfish config handler %p.\n", ConfigHandler));
+    }
+    //
+    // Install caller ID to indicate Redfish Configure Handler is initialized.
+    //
+    Status = gBS->InstallProtocolInterface (
+                  &HandleBuffer [Index],
+                  &gEfiCallerIdGuid,
+                  EFI_NATIVE_INTERFACE,
+                  (VOID *)&gRedfishConfigData.CallerId
+                  );
+    ASSERT_EFI_ERROR (Status);
+  }
+}
diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
new file mode 100644
index 0000000000..51378dff4f
--- /dev/null
+++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
@@ -0,0 +1,587 @@
+/** @file
+  The UEFI driver model driver which is responsible for locating the
+  Redfish service through Redfish host interface and executing EDKII
+  Redfish feature drivers.
+
+  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "RedfishConfigHandlerDriver.h"
+
+EFI_EVENT  gEfiRedfishDiscoverProtocolEvent = NULL;
+
+//
+// Variables for using RFI Redfish Discover Protocol
+//
+VOID                             *gEfiRedfishDiscoverRegistration;
+EFI_HANDLE                       gEfiRedfishDiscoverControllerHandle = NULL;
+EFI_REDFISH_DISCOVER_PROTOCOL    *gEfiRedfishDiscoverProtocol = NULL;
+BOOLEAN                          gRedfishDiscoverActivated = FALSE;
+BOOLEAN                          gRedfishServiceDiscovered = FALSE;
+//
+// Network interfaces discovered by EFI Redfish Discover Protocol.
+//
+UINTN                                   gNumberOfNetworkInterfaces;
+EFI_REDFISH_DISCOVER_NETWORK_INTERFACE  *gNetworkInterfaceInstances = NULL;
+EFI_REDFISH_DISCOVERED_TOKEN            *gRedfishDiscoveredToken = NULL;
+
+///
+/// Driver Binding Protocol instance
+///
+EFI_DRIVER_BINDING_PROTOCOL gRedfishConfigDriverBinding = {
+  RedfishConfigDriverBindingSupported,
+  RedfishConfigDriverBindingStart,
+  RedfishConfigDriverBindingStop,
+  REDFISH_CONFIG_VERSION,
+  NULL,
+  NULL
+};
+
+/**
+  Stop acquiring Redfish service.
+
+**/
+VOID
+RedfishConfigStopRedfishDiscovery (
+  VOID
+)
+{
+  if (gRedfishDiscoverActivated) {
+    //
+    // No more EFI Discover Protocol.
+    //
+    if (gEfiRedfishDiscoverProtocolEvent != NULL) {
+      gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
+    }
+    //
+    // Stop Redfish service discovery.
+    //
+    gEfiRedfishDiscoverProtocol->AbortAcquireRedfishService (
+                                   gEfiRedfishDiscoverProtocol,
+                                   gNetworkInterfaceInstances
+                                   );
+    gEfiRedfishDiscoverControllerHandle = NULL;
+    gEfiRedfishDiscoverProtocol = NULL;
+    gRedfishDiscoverActivated = FALSE;
+    gRedfishServiceDiscovered = FALSE;
+  }
+}
+
+/**
+  Callback function executed when a Redfish Config Handler Protocol is installed.
+
+  @param[in]  Event    Event whose notification function is being invoked.
+  @param[in]  Context  Pointer to the REDFISH_CONFIG_DRIVER_DATA buffer.
+
+**/
+VOID
+EFIAPI
+RedfishConfigHandlerInstalledCallback (
+  IN EFI_EVENT  Event,
+  IN VOID       *Context
+  )
+{
+  if (!gRedfishDiscoverActivated) {
+    //
+    // No Redfish service is discovered yet.
+    //
+    return;
+  }
+
+  RedfishConfigHandlerInitialization ();
+}
+
+/**
+  Tests to see if this driver supports a given controller. If a child device is provided,
+  it further tests to see if this driver supports creating a handle for the specified child device.
+
+  This function checks to see if the driver specified by This supports the device specified by
+  ControllerHandle. Drivers will typically use the device path attached to
+  ControllerHandle and/or the services from the bus I/O abstraction attached to
+  ControllerHandle to determine if the driver supports ControllerHandle. This function
+  may be called many times during platform initialization. In order to reduce boot times, the tests
+  performed by this function must be very small, and take as little time as possible to execute. This
+  function must not change the state of any hardware devices, and this function must be aware that the
+  device specified by ControllerHandle may already be managed by the same driver or a
+  different driver. This function must match its calls to AllocatePages() with FreePages(),
+  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
+  Because ControllerHandle may have been previously started by the same driver, if a protocol is
+  already in the opened state, then it must not be closed with CloseProtocol(). This is required
+  to guarantee the state of ControllerHandle is not modified by this function.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to test. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For bus drivers, if this parameter is not NULL, then
+                                   the bus driver must determine if the bus controller specified
+                                   by ControllerHandle and the child controller specified
+                                   by RemainingDevicePath are both supported by this
+                                   bus driver.
+
+  @retval EFI_SUCCESS              The device specified by ControllerHandle and
+                                   RemainingDevicePath is supported by the driver specified by This.
+  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and
+                                   RemainingDevicePath is not supported by the driver specified by This.
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingSupported (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   ControllerHandle,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
+  )
+{
+  EFI_REST_EX_PROTOCOL             *RestEx;
+  EFI_STATUS                       Status;
+  EFI_HANDLE                       ChildHandle;
+
+  ChildHandle = NULL;
+
+  //
+  // Check if REST EX is ready. This just makes sure
+  // the network stack is brought up.
+  //
+  Status = NetLibCreateServiceChild (
+             ControllerHandle,
+             This->ImageHandle,
+             &gEfiRestExServiceBindingProtocolGuid,
+             &ChildHandle
+             );
+  if (EFI_ERROR (Status)) {
+    return EFI_UNSUPPORTED;
+  }
+
+  //
+  // Test if REST EX protocol is ready.
+  //
+  Status = gBS->OpenProtocol(
+                  ChildHandle,
+                  &gEfiRestExProtocolGuid,
+                  (VOID**) &RestEx,
+                  This->DriverBindingHandle,
+                  ControllerHandle,
+                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                  );
+  if (EFI_ERROR (Status)) {
+    Status = EFI_UNSUPPORTED;
+  }
+  NetLibDestroyServiceChild (
+    ControllerHandle,
+    This->ImageHandle,
+    &gEfiRestExServiceBindingProtocolGuid,
+    ChildHandle
+    );
+  return Status;
+}
+
+/**
+  Starts a device controller or a bus controller.
+
+  The Start() function is designed to be invoked from the EFI boot service ConnectController().
+  As a result, much of the error checking on the parameters to Start() has been moved into this
+  common boot service. It is legal to call Start() from other locations,
+  but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE.
+  2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
+     EFI_DEVICE_PATH_PROTOCOL.
+  3. Prior to calling Start(), the Supported() function for the driver specified by This must
+     have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
+
+  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle     The handle of the controller to start. This handle
+                                   must support a protocol interface that supplies
+                                   an I/O abstraction to the driver.
+  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
+                                   parameter is ignored by device drivers, and is optional for bus
+                                   drivers. For a bus driver, if this parameter is NULL, then handles
+                                   for all the children of Controller are created by this driver.
+                                   If this parameter is not NULL and the first Device Path Node is
+                                   not the End of Device Path Node, then only the handle for the
+                                   child device specified by the first Device Path Node of
+                                   RemainingDevicePath is created by this driver.
+                                   If the first Device Path Node of RemainingDevicePath is
+                                   the End of Device Path Node, no child handle is created by this
+                                   driver.
+
+  @retval EFI_SUCCESS              The driver is started.
+  @retval EFI_ALREADY_STARTED      The driver was already started.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingStart (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   ControllerHandle,
+  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
+  )
+{
+  VOID *ConfigHandlerRegistration;
+
+  if (gRedfishConfigData.Event != NULL) {
+    return EFI_ALREADY_STARTED;
+  }
+
+  gRedfishConfigData.Event = EfiCreateProtocolNotifyEvent (
+                                &gEdkIIRedfishConfigHandlerProtocolGuid,
+                                TPL_CALLBACK,
+                                RedfishConfigHandlerInstalledCallback,
+                                (VOID *)&gRedfishConfigData,
+                                &ConfigHandlerRegistration
+                                );
+  return EFI_SUCCESS;
+}
+
+/**
+  Stops a device controller or a bus controller.
+
+  The Stop() function is designed to be invoked from the EFI boot service DisconnectController().
+  As a result, much of the error checking on the parameters to Stop() has been moved
+  into this common boot service. It is legal to call Stop() from other locations,
+  but the following calling restrictions must be followed, or the system behavior will not be deterministic.
+  1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
+     same driver's Start() function.
+  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
+     EFI_HANDLE. In addition, all of these handles must have been created in this driver's
+     Start() function, and the Start() function must have called OpenProtocol() on
+     ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
+
+  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
+  @param[in]  ControllerHandle  A handle to the device being stopped. The handle must
+                                support a bus specific I/O protocol for the driver
+                                to use to stop the device.
+  @param[in]  NumberOfChildren  The number of child device handles in ChildHandleBuffer.
+  @param[in]  ChildHandleBuffer An array of child handles to be freed. May be NULL
+                                if NumberOfChildren is 0.
+
+  @retval EFI_SUCCESS           The device was stopped.
+  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a device error.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigDriverBindingStop (
+  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
+  IN EFI_HANDLE                   ControllerHandle,
+  IN UINTN                        NumberOfChildren,
+  IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL
+  )
+{
+  EFI_STATUS  Status;
+
+  if (ControllerHandle == gEfiRedfishDiscoverControllerHandle) {
+    RedfishConfigStopRedfishDiscovery ();
+  }
+  gBS->CloseProtocol (
+         ControllerHandle,
+         &gEfiRedfishDiscoverProtocolGuid,
+         gRedfishConfigData.Image,
+         gRedfishConfigData.Image
+         );
+
+  Status = RedfishConfigCommonStop ();
+  if (EFI_ERROR (Status)) {
+    return EFI_DEVICE_ERROR;
+  }
+
+  if (gRedfishConfigData.Event != NULL) {
+    gBS->CloseEvent (gRedfishConfigData.Event);
+    gRedfishConfigData.Event = NULL;
+  }
+  return EFI_SUCCESS;
+}
+
+/**
+  Callback function when Redfish service is discovered.
+
+  @param[in]   Event    Event whose notification function is being invoked.
+  @param[out]  Context  Pointer to the Context buffer
+
+**/
+VOID
+EFIAPI
+RedfishServiceDiscoveredCallback (
+  IN  EFI_EVENT  Event,
+  OUT VOID       *Context
+  )
+{
+  EFI_REDFISH_DISCOVERED_TOKEN *RedfishDiscoveredToken;
+  EFI_REDFISH_DISCOVERED_INSTANCE *RedfishInstance;
+
+  if (gRedfishServiceDiscovered) {
+    //
+    // Only support one Redfish service on platform.
+    //
+    return;
+  }
+
+  RedfishDiscoveredToken = (EFI_REDFISH_DISCOVERED_TOKEN *)Context;
+  RedfishInstance = RedfishDiscoveredToken->DiscoverList.RedfishInstances;
+  //
+  // Only pick up the first found Redfish service.
+  //
+  if (RedfishInstance->Status == EFI_SUCCESS) {
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceRestExHandle = RedfishInstance->Information.RedfishRestExHandle;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceVersion      = RedfishInstance->Information.RedfishVersion;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceLocation     = RedfishInstance->Information.Location;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUuid         = RedfishInstance->Information.Uuid;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOs           = RedfishInstance->Information.Os;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOsVersion    = RedfishInstance->Information.OsVersion;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProduct      = RedfishInstance->Information.Product;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProductVer   = RedfishInstance->Information.ProductVer;
+    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUseHttps     = RedfishInstance->Information.UseHttps;
+    gRedfishServiceDiscovered = TRUE;
+  }
+
+  //
+  // Invoke RedfishConfigHandlerInstalledCallback to execute
+  // the initialization of Redfish Configure Handler instance.
+  //
+  RedfishConfigHandlerInstalledCallback (gRedfishConfigData.Event, &gRedfishConfigData);
+}
+
+/**
+  Callback function executed when the EFI_REDFISH_DISCOVER_PROTOCOL
+  protocol interface is installed.
+
+  @param[in]   Event    Event whose notification function is being invoked.
+  @param[out]  Context  Pointer to the Context buffer
+
+**/
+VOID
+EFIAPI
+RedfishDiscoverProtocolInstalled (
+  IN  EFI_EVENT  Event,
+  OUT VOID       *Context
+  )
+{
+  EFI_STATUS Status;
+  UINTN BufferSize;
+  EFI_HANDLE HandleBuffer;
+  UINTN NetworkInterfaceIndex;
+  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE *ThisNetworkInterface;
+  EFI_REDFISH_DISCOVERED_TOKEN           *ThisRedfishDiscoveredToken;
+
+  DEBUG((DEBUG_INFO, "%a: New network interface is installed on system by EFI Redfish discover driver.\n", __FUNCTION__));
+
+  BufferSize = sizeof (EFI_HANDLE);
+  Status = gBS->LocateHandle (
+                  ByRegisterNotify,
+                  NULL,
+                  gEfiRedfishDiscoverRegistration,
+                  &BufferSize,
+                  &HandleBuffer
+                );
+  if (EFI_ERROR (Status)) {
+    DEBUG((DEBUG_ERROR, "%a: Can't locate handle with EFI_REDFISH_DISCOVER_PROTOCOL installed.\n", __FUNCTION__));
+  }
+  gRedfishDiscoverActivated = TRUE;
+  if (gEfiRedfishDiscoverProtocol == NULL) {
+     gEfiRedfishDiscoverControllerHandle = HandleBuffer;
+    //
+    // First time to open EFI_REDFISH_DISCOVER_PROTOCOL.
+    //
+    Status = gBS->OpenProtocol(
+                      gEfiRedfishDiscoverControllerHandle,
+                      &gEfiRedfishDiscoverProtocolGuid,
+                      (VOID **)&gEfiRedfishDiscoverProtocol,
+                      gRedfishConfigData.Image,
+                      gRedfishConfigData.Image,
+                      EFI_OPEN_PROTOCOL_BY_DRIVER
+                    );
+    if (EFI_ERROR (Status)) {
+      gEfiRedfishDiscoverProtocol = NULL;
+      gRedfishDiscoverActivated = FALSE;
+      DEBUG((DEBUG_ERROR, "%a: Can't locate EFI_REDFISH_DISCOVER_PROTOCOL.\n", __FUNCTION__));
+      return;
+    }
+  }
+  //
+  // Check the new found network interface.
+  //
+  if (gNetworkInterfaceInstances != NULL) {
+    FreePool (gNetworkInterfaceInstances);
+  }
+  Status = gEfiRedfishDiscoverProtocol->GetNetworkInterfaceList(
+                                          gEfiRedfishDiscoverProtocol,
+                                          gRedfishConfigData.Image,
+                                          &gNumberOfNetworkInterfaces,
+                                          &gNetworkInterfaceInstances
+                                          );
+  if (EFI_ERROR (Status) || gNumberOfNetworkInterfaces == 0) {
+    DEBUG((DEBUG_ERROR, "%a: No network interfaces found on the handle.\n", __FUNCTION__));
+    return;
+  }
+
+  gRedfishDiscoveredToken = AllocateZeroPool (gNumberOfNetworkInterfaces * sizeof (EFI_REDFISH_DISCOVERED_TOKEN));
+  if (gRedfishDiscoveredToken == NULL) {
+    DEBUG((DEBUG_ERROR, "%a: Not enough memory for EFI_REDFISH_DISCOVERED_TOKEN.\n", __FUNCTION__));
+    return;
+  }
+
+  ThisNetworkInterface = gNetworkInterfaceInstances;
+  ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
+  //
+  // Loop to discover Redfish service on each network interface.
+  //
+  for (NetworkInterfaceIndex = 0; NetworkInterfaceIndex < gNumberOfNetworkInterfaces; NetworkInterfaceIndex ++) {
+    //
+    // Initial this Redfish Discovered Token
+    //
+    Status = gBS->CreateEvent (
+                    EVT_NOTIFY_SIGNAL,
+                    TPL_CALLBACK,
+                    RedfishServiceDiscoveredCallback,
+                    (VOID *)ThisRedfishDiscoveredToken,
+                    &ThisRedfishDiscoveredToken->Event
+                  );
+    if (EFI_ERROR (Status)) {
+      DEBUG((DEBUG_ERROR, "%a: Failed to create event for Redfish discovered token.\n", __FUNCTION__));
+      goto ErrorReturn;
+    }
+    ThisRedfishDiscoveredToken->Signature = REDFISH_DISCOVER_TOKEN_SIGNATURE;
+    ThisRedfishDiscoveredToken->DiscoverList.NumberOfServiceFound = 0;
+    ThisRedfishDiscoveredToken->DiscoverList.RedfishInstances = NULL;
+    //
+    // Acquire for Redfish service which is reported by
+    // Redfish Host Interface.
+    //
+    Status = gEfiRedfishDiscoverProtocol->AcquireRedfishService(
+                                             gEfiRedfishDiscoverProtocol,
+                                             gRedfishConfigData.Image,
+                                             ThisNetworkInterface,
+                                             EFI_REDFISH_DISCOVER_HOST_INTERFACE,
+                                             ThisRedfishDiscoveredToken
+                                             );
+    ThisNetworkInterface ++;
+    ThisRedfishDiscoveredToken ++;
+  }
+  if (EFI_ERROR (Status)) {
+    DEBUG((DEBUG_ERROR, "%a: Acquire Redfish service fail.\n", __FUNCTION__));
+    goto ErrorReturn;
+  }
+  return;
+
+ErrorReturn:
+  if (gRedfishDiscoveredToken != NULL) {
+    FreePool(gRedfishDiscoveredToken);
+  }
+}
+
+/**
+  Unloads an image.
+
+  @param[in]  ImageHandle       Handle that identifies the image to be unloaded.
+
+  @retval EFI_SUCCESS           The image has been unloaded.
+
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigHandlerDriverUnload (
+  IN EFI_HANDLE  ImageHandle
+  )
+{
+  EFI_REDFISH_DISCOVERED_TOKEN *ThisRedfishDiscoveredToken;
+  UINTN NumberOfNetworkInterfacesIndex;
+
+  RedfishConfigDriverCommonUnload (ImageHandle);
+
+  RedfishConfigStopRedfishDiscovery ();
+  if (gRedfishDiscoveredToken != NULL) {
+    ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
+    for (NumberOfNetworkInterfacesIndex = 0; NumberOfNetworkInterfacesIndex < gNumberOfNetworkInterfaces; NumberOfNetworkInterfacesIndex ++) {
+      if (ThisRedfishDiscoveredToken->Event != NULL) {
+        gBS->CloseEvent (ThisRedfishDiscoveredToken->Event);
+      }
+      FreePool (ThisRedfishDiscoveredToken);
+      ThisRedfishDiscoveredToken ++;
+    }
+    gRedfishDiscoveredToken = NULL;
+  }
+  return EFI_SUCCESS;
+}
+
+/**
+  This is the declaration of an EFI image entry point. This entry point is
+  the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
+  both device drivers and bus drivers.
+
+  @param[in]  ImageHandle       The firmware allocated handle for the UEFI image.
+  @param[in]  SystemTable       A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS           The operation completed successfully.
+  @retval Others                An unexpected error occurred.
+**/
+EFI_STATUS
+EFIAPI
+RedfishConfigHandlerDriverEntryPoint (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS    Status;
+
+  ZeroMem ((VOID *)&gRedfishConfigData, sizeof (REDFISH_CONFIG_DRIVER_DATA));
+  gRedfishConfigData.Image = ImageHandle;
+  //
+  // Register event for EFI_REDFISH_DISCOVER_PROTOCOL protocol install
+  // notification.
+  //
+  Status = gBS->CreateEventEx (
+                  EVT_NOTIFY_SIGNAL,
+                  TPL_CALLBACK,
+                  RedfishDiscoverProtocolInstalled,
+                  NULL,
+                  &gEfiRedfishDiscoverProtocolGuid,
+                  &gEfiRedfishDiscoverProtocolEvent
+                  );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "%a: Fail to create event for the installation of EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
+    return Status;
+  }
+  Status = gBS->RegisterProtocolNotify (
+                  &gEfiRedfishDiscoverProtocolGuid,
+                  gEfiRedfishDiscoverProtocolEvent,
+                  &gEfiRedfishDiscoverRegistration
+                );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_ERROR, "%a: Fail to register event for the installation of EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
+    return Status;
+  }
+
+  Status = RedfishConfigCommonInit (ImageHandle, SystemTable);
+  if (EFI_ERROR (Status)) {
+    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
+    gEfiRedfishDiscoverProtocolEvent = NULL;
+    return Status;
+  }
+
+  //
+  // Install UEFI Driver Model protocol(s).
+  //
+  Status = EfiLibInstallDriverBinding (
+             ImageHandle,
+             SystemTable,
+             &gRedfishConfigDriverBinding,
+             ImageHandle
+             );
+  if (EFI_ERROR (Status)) {
+    gBS->CloseEvent (gEndOfDxeEvent);
+    gEndOfDxeEvent = NULL;
+    gBS->CloseEvent (gExitBootServiceEvent);
+    gExitBootServiceEvent = NULL;
+    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
+    gEfiRedfishDiscoverProtocolEvent = NULL;
+    DEBUG ((DEBUG_ERROR, "%a: Fail to install EFI Binding Protocol of EFI Redfish Config driver.", __FUNCTION__));
+    return Status;
+  }
+  return Status;
+}
+
-- 
2.17.1








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Ah, yes. I will revise the copyrights in Redfish.fdf.inc and RedfishComponents.dsc.inc when merge it.
Thanks for catching this.

Abner

> -----Original Message-----
> From: Wang, Nickle (HPS SW)
> Sent: Monday, April 12, 2021 11:53 AM
> To: devel@edk2.groups.io; Chang, Abner (HPS SW/FW Technologist)
> <abner.chang@hpe.com>
> Subject: RE: [edk2-devel] [PATCH] RedfishPkg/RedfishConfigHandler: EDKII
> RedfishConfigHandler Protocol
> 
> Looks good to me. But for the copyright, I think it would be "2020-2021", right?
> For example:
> 
> -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> 
> Thanks,
> Nickle
> 
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Abner
> Chang
> Sent: Friday, March 26, 2021 1:55 PM
> To: devel@edk2.groups.io
> Cc: Wang, Nickle (HPS SW) <nickle.wang@hpe.com>
> Subject: [edk2-devel] [PATCH] RedfishPkg/RedfishConfigHandler: EDKII
> RedfishConfigHandler Protocol
> 
> The driver is used to manage EDK2 Redfish Configuration Handler
> Protocol installed by EDK2 Redfish feature drivers.
> This is the EDK2 Redfish client driver written based on the EDK2
> Redfish foundation to initialize EDK2 Redfish feature drivers.
> 
> EDK2 Redfish feature drivers are used to provision/consume/update
> the firmware owns Redfish properties during system power on
> initialization.
> 
> RedfishConfigHandlerCommon.c has the common code for the driver
> instances used in different EDK2 boot phases or used by different
> driver models in the future contribution.
> 
> Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
> Signed-off-by: Siyuan Fu <siyuan.fu@intel.com>
> Signed-off-by: Fan Wang <fan.wang@intel.com>
> Signed-off-by: Abner Chang <abner.chang@hpe.com>
> 
> Cc: Nickle Wang <nickle.wang@hpe.com>
> ---
>  RedfishPkg/RedfishComponents.dsc.inc          |   3 +-
>  RedfishPkg/Redfish.fdf.inc                    |   3 +-
>  .../RedfishConfigHandlerDriver.inf            |  60 ++
>  .../RedfishConfigHandlerCommon.h              | 101 +++
>  .../RedfishConfigHandlerDriver.h              | 159 +++++
>  .../RedfishConfigHandlerCommon.c              | 265 ++++++++
>  .../RedfishConfigHandlerDriver.c              | 587 ++++++++++++++++++
>  7 files changed, 1176 insertions(+), 2 deletions(-)
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> 
> diff --git a/RedfishPkg/RedfishComponents.dsc.inc
> b/RedfishPkg/RedfishComponents.dsc.inc
> index 08f1d3bc32..d0116f065c 100644
> --- a/RedfishPkg/RedfishComponents.dsc.inc
> +++ b/RedfishPkg/RedfishComponents.dsc.inc
> @@ -6,7 +6,7 @@
>  # of EDKII Redfish drivers according to the value of flags described in
>  # "RedfishDefines.dsc.inc".
>  #
> -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
>  #
>  #    SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -17,4 +17,5 @@
>    RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
>    RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
>    RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
> +  RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
>  !endif
> diff --git a/RedfishPkg/Redfish.fdf.inc b/RedfishPkg/Redfish.fdf.inc
> index a64fd119a9..9673246b3f 100644
> --- a/RedfishPkg/Redfish.fdf.inc
> +++ b/RedfishPkg/Redfish.fdf.inc
> @@ -5,7 +5,7 @@
>  # by using "!include RedfishPkg/RedfisLibs.fdf.inc" to specify the module
> instances
>  # to be built in the firmware volume.
>  #
> -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
>  #
>  #    SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -15,4 +15,5 @@
>    INF RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
>    INF RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
>    INF RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
> +  INF RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
>  !endif
> diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> new file mode 100644
> index 0000000000..def91c7531
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> @@ -0,0 +1,60 @@
> +## @file
> +#  INF file for the UEFI driver model Redfish Configuration Handler
> +#  Driver.
> +#
> +#  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> +#  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +#
> +#  SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +##
> +
> +[Defines]
> +  INF_VERSION               = 0x0001000b
> +  BASE_NAME                 = RedfishConfigHandlerDriver
> +  FILE_GUID                 = 6e881000-5749-11e8-9bf0-8cdcd426c973
> +  MODULE_TYPE               = UEFI_DRIVER
> +  VERSION_STRING            = 1.0
> +  ENTRY_POINT               = RedfishConfigHandlerDriverEntryPoint
> +  UNLOAD_IMAGE              = RedfishConfigHandlerDriverUnload
> +
> +#
> +#  VALID_ARCHITECTURES      = IA32 X64 ARM AARCH64 RISCV64
> +#
> +
> +[Packages]
> +  MdePkg/MdePkg.dec
> +  MdeModulePkg/MdeModulePkg.dec
> +  NetworkPkg/NetworkPkg.dec
> +  RedfishPkg/RedfishPkg.dec
> +
> +[Sources]
> +  RedfishConfigHandlerDriver.h
> +  RedfishConfigHandlerDriver.c
> +  RedfishConfigHandlerCommon.h
> +  RedfishConfigHandlerCommon.c
> +
> +[LibraryClasses]
> +  BaseLib
> +  BaseMemoryLib
> +  DebugLib
> +  UefiLib
> +  MemoryAllocationLib
> +  NetLib
> +  UefiBootServicesTableLib
> +  UefiDriverEntryPoint
> +
> +[Protocols]
> +  gEfiRedfishDiscoverProtocolGuid         ## CONSUMES
> +  gEfiRestExServiceBindingProtocolGuid
> +  gEfiRestExProtocolGuid                  ## CONSUMES
> +  gEdkIIRedfishCredentialProtocolGuid     ## CONSUMES
> +  gEdkIIRedfishConfigHandlerProtocolGuid  ## CONSUMES
> +
> +[Guids]
> +  gEfiEventExitBootServicesGuid           ## CONSUMES ## Event
> +  gEfiEndOfDxeEventGroupGuid              ## CONSUMES ## Event
> +
> +[Depex]
> +  TRUE
> +
> diff --git
> a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> new file mode 100644
> index 0000000000..5e46c42219
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> @@ -0,0 +1,101 @@
> +/** @file
> +  Common Header file for Redfish Configuration Handler UEFI driver
> +  and DXE driver.
> +
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#ifndef EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
> +#define EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
> +
> +#include <Uefi.h>
> +
> +//
> +// Libraries
> +//
> +#include <Library/BaseLib.h>
> +#include <Library/BaseMemoryLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/MemoryAllocationLib.h>
> +#include <Library/NetLib.h>
> +#include <Library/UefiBootServicesTableLib.h>
> +#include <Library/UefiDriverEntryPoint.h>
> +#include <Library/UefiLib.h>
> +
> +//
> +// Consumed Protocols
> +//
> +#include <Protocol/EdkIIRedfishCredential.h>
> +#include <Protocol/EdkIIRedfishConfigHandler.h>
> +
> +//
> +// Driver Version
> +//
> +#define REDFISH_CONFIG_VERSION  0x00000001
> +
> +///
> +///  Internal structure used by Redfish Config DXE driver.
> +///
> +typedef struct {
> +  UINT32        CallerId;  ///< Caller ID used to indicate Redfish Config Handler
> +                           ///< has been initiated
> +  EFI_HANDLE    Image;     ///< Image handle of Redfish Config Driver
> +  EFI_EVENT     Event;     ///< Event for the notification of
> EFI_REDFISH_CONFIG_HANDLER_PROTOCOL
> +  REDFISH_CONFIG_SERVICE_INFORMATION RedfishServiceInfo; ///
> Redfish Service information discovered
> +} REDFISH_CONFIG_DRIVER_DATA;
> +
> +/**
> +  Common code of unloading image for both UEFI/DXE Redfish
> Configuration drivers.
> +
> +  @param[in]  ImageHandle       Handle that identifies the image to be
> unloaded.
> +
> +  @retval EFI_SUCCESS           The image has been unloaded.
> +
> +**/
> +EFI_STATUS
> +RedfishConfigDriverCommonUnload (
> +  IN EFI_HANDLE  ImageHandle
> +  );
> +
> +/**
> +  This is the common code for Redfish configuration UEFI and DXE driver
> +  initialization.
> +
> +  @param[in]  ImageHandle       The firmware allocated handle for the UEFI
> image.
> +  @param[in]  SystemTable       A pointer to the EFI System Table.
> +
> +  @retval EFI_SUCCESS           The operation completed successfully.
> +  @retval Others                An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonInit (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  );
> +
> +/**
> +  This is the common code to stop EDK2 Redfish feature driver.
> +
> +  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
> +                         stopped.
> +  @retval Others         An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonStop (
> +  VOID
> +);
> +
> +/**
> +  Callback function executed when a Redfish Config Handler Protocol is
> installed
> +  by EDK2 Redfish Feature Drivers.
> +
> +**/
> +VOID
> +RedfishConfigHandlerInitialization (
> +  VOID
> +  );
> +
> +#endif
> diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> new file mode 100644
> index 0000000000..58202c41e2
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> @@ -0,0 +1,159 @@
> +/** @file
> +  Header file of Redfish Configuration Handler UEFI driver.
> +
> +  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#ifndef EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
> +#define EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
> +
> +#include "RedfishConfigHandlerCommon.h"
> +
> +//
> +// UEFI Driver Model Protocols
> +//
> +
> +#include <Protocol/DriverBinding.h>
> +#include <Protocol/RedfishDiscover.h>
> +#include <Protocol/RestEx.h>
> +
> +//
> +// Protocol instances
> +//
> +extern EFI_DRIVER_BINDING_PROTOCOL  gRedfishConfigDriverBinding;
> +
> +extern REDFISH_CONFIG_DRIVER_DATA        gRedfishConfigData;
> +extern EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential;
> +extern EFI_EVENT                         gEndOfDxeEvent;
> +extern EFI_EVENT                         gExitBootServiceEvent;
> +
> +/**
> +  Tests to see if this driver supports a given controller. If a child device is
> provided,
> +  it further tests to see if this driver supports creating a handle for the
> specified child device.
> +
> +  This function checks to see if the driver specified by This supports the
> device specified by
> +  ControllerHandle. Drivers will typically use the device path attached to
> +  ControllerHandle and/or the services from the bus I/O abstraction
> attached to
> +  ControllerHandle to determine if the driver supports ControllerHandle.
> This function
> +  may be called many times during platform initialization. In order to reduce
> boot times, the tests
> +  performed by this function must be very small, and take as little time as
> possible to execute. This
> +  function must not change the state of any hardware devices, and this
> function must be aware that the
> +  device specified by ControllerHandle may already be managed by the
> same driver or a
> +  different driver. This function must match its calls to AllocatePages() with
> FreePages(),
> +  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
> +  Because ControllerHandle may have been previously started by the same
> driver, if a protocol is
> +  already in the opened state, then it must not be closed with
> CloseProtocol(). This is required
> +  to guarantee the state of ControllerHandle is not modified by this function.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to test. This
> handle
> +                                   must support a protocol interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a
> device path.  This
> +                                   parameter is ignored by device drivers, and is optional for
> bus
> +                                   drivers. For bus drivers, if this parameter is not NULL, then
> +                                   the bus driver must determine if the bus controller
> specified
> +                                   by ControllerHandle and the child controller specified
> +                                   by RemainingDevicePath are both supported by this
> +                                   bus driver.
> +
> +  @retval EFI_SUCCESS              The device specified by ControllerHandle and
> +                                   RemainingDevicePath is supported by the driver specified
> by This.
> +  @retval EFI_ALREADY_STARTED      The device specified by
> ControllerHandle and
> +                                   RemainingDevicePath is already being managed by the
> driver
> +                                   specified by This.
> +  @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle
> and
> +                                   RemainingDevicePath is already being managed by a
> different
> +                                   driver or an application that requires exclusive access.
> +                                   Currently not implemented.
> +  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle
> and
> +                                   RemainingDevicePath is not supported by the driver
> specified by This.
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingSupported (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  );
> +
> +/**
> +  Starts a device controller or a bus controller.
> +
> +  The Start() function is designed to be invoked from the EFI boot service
> ConnectController().
> +  As a result, much of the error checking on the parameters to Start() has
> been moved into this
> +  common boot service. It is legal to call Start() from other locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE.
> +  2. If RemainingDevicePath is not NULL, then it must be a pointer to a
> naturally aligned
> +     EFI_DEVICE_PATH_PROTOCOL.
> +  3. Prior to calling Start(), the Supported() function for the driver specified
> by This must
> +     have been called with the same calling parameters, and Supported()
> must have returned EFI_SUCCESS.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to start. This
> handle
> +                                   must support a protocol interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a
> device path.  This
> +                                   parameter is ignored by device drivers, and is optional for
> bus
> +                                   drivers. For a bus driver, if this parameter is NULL, then
> handles
> +                                   for all the children of Controller are created by this driver.
> +                                   If this parameter is not NULL and the first Device Path
> Node is
> +                                   not the End of Device Path Node, then only the handle for
> the
> +                                   child device specified by the first Device Path Node of
> +                                   RemainingDevicePath is created by this driver.
> +                                   If the first Device Path Node of RemainingDevicePath is
> +                                   the End of Device Path Node, no child handle is created by
> this
> +                                   driver.
> +
> +  @retval EFI_SUCCESS              The driver is started.
> +  @retval EFI_ALREADY_STARTED      The driver was already started.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStart (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  );
> +
> +/**
> +  Stops a device controller or a bus controller.
> +
> +  The Stop() function is designed to be invoked from the EFI boot service
> DisconnectController().
> +  As a result, much of the error checking on the parameters to Stop() has
> been moved
> +  into this common boot service. It is legal to call Stop() from other locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE that was used on a
> previous call to this
> +     same driver's Start() function.
> +  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a
> valid
> +     EFI_HANDLE. In addition, all of these handles must have been created in
> this driver's
> +     Start() function, and the Start() function must have called OpenProtocol()
> on
> +     ControllerHandle with an Attribute of
> EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
> +
> +  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL
> instance.
> +  @param[in]  ControllerHandle  A handle to the device being stopped. The
> handle must
> +                                support a bus specific I/O protocol for the driver
> +                                to use to stop the device.
> +  @param[in]  NumberOfChildren  The number of child device handles in
> ChildHandleBuffer.
> +  @param[in]  ChildHandleBuffer An array of child handles to be freed. May
> be NULL
> +                                if NumberOfChildren is 0.
> +
> +  @retval EFI_SUCCESS           The device was stopped.
> +  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a
> device error.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStop (
> +  IN  EFI_DRIVER_BINDING_PROTOCOL *This,
> +  IN  EFI_HANDLE                  ControllerHandle,
> +  IN  UINTN                       NumberOfChildren,
> +  IN  EFI_HANDLE                  *ChildHandleBuffer OPTIONAL
> +  );
> +#endif
> diff --git
> a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> new file mode 100644
> index 0000000000..ff465d9ff3
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> @@ -0,0 +1,265 @@
> +/** @file
> +  The common code of EDKII Redfish Configuration Handler driver.
> +
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "RedfishConfigHandlerCommon.h"
> +
> +REDFISH_CONFIG_DRIVER_DATA      gRedfishConfigData; // Only one
> Redfish service supproted
> +                                                    // on platform for the BIOS
> +                                                    // Redfish configuration.
> +EFI_EVENT  gEndOfDxeEvent = NULL;
> +EFI_EVENT  gExitBootServiceEvent = NULL;
> +EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential = NULL;
> +
> +/**
> +  Callback function executed when the EndOfDxe event group is signaled.
> +
> +  @param[in]   Event    Event whose notification function is being invoked.
> +  @param[out]  Context  Pointer to the Context buffer.
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishConfigOnEndOfDxe (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_STATUS                          Status;
> +
> +  Status = gCredential->StopService (gCredential,
> ServiceStopTypeSecureBootDisabled);
> +  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
> +    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop
> service on EndOfDxe: %r", Status));
> +  }
> +
> +  //
> +  // Close event, so it will not be invoked again.
> +  //
> +  gBS->CloseEvent (gEndOfDxeEvent);
> +  gEndOfDxeEvent = NULL;
> +}
> +
> +/**
> +  Callback function executed when the ExitBootService event group is
> signaled.
> +
> +  @param[in]   Event    Event whose notification function is being invoked.
> +  @param[out]  Context  Pointer to the Context buffer
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishConfigOnExitBootService (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_STATUS                          Status;
> +
> +  Status = gCredential->StopService (gCredential,
> ServiceStopTypeExitBootService);
> +  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
> +    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop
> service on ExitBootService: %r", Status));
> +  }
> +}
> +
> +/**
> +  Unloads an image.
> +
> +  @param[in]  ImageHandle       Handle that identifies the image to be
> unloaded.
> +
> +  @retval EFI_SUCCESS           The image has been unloaded.
> +
> +**/
> +EFI_STATUS
> +RedfishConfigDriverCommonUnload (
> +  IN EFI_HANDLE  ImageHandle
> +  )
> +{
> +  if (gEndOfDxeEvent != NULL) {
> +    gBS->CloseEvent (gEndOfDxeEvent);
> +    gEndOfDxeEvent = NULL;
> +  }
> +
> +  if (gExitBootServiceEvent != NULL) {
> +    gBS->CloseEvent (gExitBootServiceEvent);
> +    gExitBootServiceEvent = NULL;
> +  }
> +
> +  if (gRedfishConfigData.Event != NULL) {
> +    gBS->CloseEvent (gRedfishConfigData.Event);
> +    gRedfishConfigData.Event = NULL;
> +  }
> +
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This is the common code for Redfish configuration UEFI and DXE driver
> +  initialization.
> +
> +  @param[in]  ImageHandle       The firmware allocated handle for the UEFI
> image.
> +  @param[in]  SystemTable       A pointer to the EFI System Table.
> +
> +  @retval EFI_SUCCESS           The operation completed successfully.
> +  @retval Others                An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonInit (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  )
> +{
> +  EFI_STATUS Status;
> +  //
> +  // Locate Redfish Credential Protocol to get credential for
> +  // accessing to Redfish service.
> +  //
> +  Status = gBS->LocateProtocol (&gEdkIIRedfishCredentialProtocolGuid,
> NULL, (VOID **) &gCredential);
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_INFO, "%a: No Redfish Credential Protocol is installed on
> system.", __FUNCTION__));
> +    return Status;
> +  }
> +  //
> +  // Create EndOfDxe Event.
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  RedfishConfigOnEndOfDxe,
> +                  NULL,
> +                  &gEfiEndOfDxeEventGroupGuid,
> +                  &gEndOfDxeEvent
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to register End Of DXE event.",
> __FUNCTION__));
> +    return Status;
> +  }
> +  //
> +  // Create Exit Boot Service event.
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  RedfishConfigOnExitBootService,
> +                  NULL,
> +                  &gEfiEventExitBootServicesGuid,
> +                  &gExitBootServiceEvent
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    gBS->CloseEvent (gEndOfDxeEvent);
> +    gEndOfDxeEvent = NULL;
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to register Exit Boot Service event.",
> __FUNCTION__));
> +    return Status;
> +  }
> +  return EFI_SUCCESS;
> +}
> +/**
> +  This is the common code to stop EDK2 Redfish feature driver.
> +
> +  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
> +                         stopped.
> +  @retval Others         An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonStop (
> +  VOID
> +)
> +{
> +  EFI_STATUS   Status;
> +  EFI_HANDLE  *HandleBuffer;
> +  UINTN        NumberOfHandles;
> +  UINTN        Index;
> +  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
> +
> +  Status = gBS->LocateHandleBuffer (
> +                  ByProtocol,
> +                  &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                  NULL,
> +                  &NumberOfHandles,
> +                  &HandleBuffer
> +                  );
> +  if (EFI_ERROR (Status) && Status != EFI_NOT_FOUND) {
> +    return Status;
> +  }
> +
> +  Status = EFI_SUCCESS;
> +  for (Index = 0; Index < NumberOfHandles; Index++) {
> +    Status = gBS->HandleProtocol (
> +                     HandleBuffer[Index],
> +                     &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                     (VOID**) &ConfigHandler
> +                     );
> +    ASSERT_EFI_ERROR (Status);
> +
> +    Status = ConfigHandler->Stop (ConfigHandler);
> +    if (EFI_ERROR (Status) && Status != EFI_UNSUPPORTED) {
> +      DEBUG ((DEBUG_ERROR, "ERROR: Failed to stop Redfish config handler
> %p.\n", ConfigHandler));
> +      break;
> +    }
> +  }
> +  return Status;
> +}
> +/**
> +  Callback function executed when a Redfish Config Handler Protocol is
> installed
> +  by EDK2 Redfish Feature Drivers.
> +
> +**/
> +VOID
> +RedfishConfigHandlerInitialization (
> +  VOID
> +  )
> +{
> +  EFI_STATUS                            Status;
> +  EFI_HANDLE                            *HandleBuffer;
> +  UINTN                                 NumberOfHandles;
> +  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
> +  UINTN                                 Index;
> +  UINT32                                Id;
> +
> +  Status = gBS->LocateHandleBuffer (
> +                  ByProtocol,
> +                  &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                  NULL,
> +                  &NumberOfHandles,
> +                  &HandleBuffer
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    return;
> +  }
> +
> +  for (Index = 0; Index < NumberOfHandles; Index++) {
> +    Status = gBS->HandleProtocol (
> +                    HandleBuffer [Index],
> +                    &gEfiCallerIdGuid,
> +                    (VOID **) &Id
> +                    );
> +    if (!EFI_ERROR (Status)) {
> +      continue;
> +    }
> +
> +    Status = gBS->HandleProtocol (
> +                     HandleBuffer [Index],
> +                     &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                     (VOID**) &ConfigHandler
> +                     );
> +    ASSERT_EFI_ERROR (Status);
> +    Status = ConfigHandler->Init (ConfigHandler,
> &gRedfishConfigData.RedfishServiceInfo);
> +    if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
> +      DEBUG ((DEBUG_ERROR, "ERROR: Failed to init Redfish config handler
> %p.\n", ConfigHandler));
> +    }
> +    //
> +    // Install caller ID to indicate Redfish Configure Handler is initialized.
> +    //
> +    Status = gBS->InstallProtocolInterface (
> +                  &HandleBuffer [Index],
> +                  &gEfiCallerIdGuid,
> +                  EFI_NATIVE_INTERFACE,
> +                  (VOID *)&gRedfishConfigData.CallerId
> +                  );
> +    ASSERT_EFI_ERROR (Status);
> +  }
> +}
> diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> new file mode 100644
> index 0000000000..51378dff4f
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> @@ -0,0 +1,587 @@
> +/** @file
> +  The UEFI driver model driver which is responsible for locating the
> +  Redfish service through Redfish host interface and executing EDKII
> +  Redfish feature drivers.
> +
> +  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "RedfishConfigHandlerDriver.h"
> +
> +EFI_EVENT  gEfiRedfishDiscoverProtocolEvent = NULL;
> +
> +//
> +// Variables for using RFI Redfish Discover Protocol
> +//
> +VOID                             *gEfiRedfishDiscoverRegistration;
> +EFI_HANDLE                       gEfiRedfishDiscoverControllerHandle = NULL;
> +EFI_REDFISH_DISCOVER_PROTOCOL    *gEfiRedfishDiscoverProtocol = NULL;
> +BOOLEAN                          gRedfishDiscoverActivated = FALSE;
> +BOOLEAN                          gRedfishServiceDiscovered = FALSE;
> +//
> +// Network interfaces discovered by EFI Redfish Discover Protocol.
> +//
> +UINTN                                   gNumberOfNetworkInterfaces;
> +EFI_REDFISH_DISCOVER_NETWORK_INTERFACE
> *gNetworkInterfaceInstances = NULL;
> +EFI_REDFISH_DISCOVERED_TOKEN            *gRedfishDiscoveredToken = NULL;
> +
> +///
> +/// Driver Binding Protocol instance
> +///
> +EFI_DRIVER_BINDING_PROTOCOL gRedfishConfigDriverBinding = {
> +  RedfishConfigDriverBindingSupported,
> +  RedfishConfigDriverBindingStart,
> +  RedfishConfigDriverBindingStop,
> +  REDFISH_CONFIG_VERSION,
> +  NULL,
> +  NULL
> +};
> +
> +/**
> +  Stop acquiring Redfish service.
> +
> +**/
> +VOID
> +RedfishConfigStopRedfishDiscovery (
> +  VOID
> +)
> +{
> +  if (gRedfishDiscoverActivated) {
> +    //
> +    // No more EFI Discover Protocol.
> +    //
> +    if (gEfiRedfishDiscoverProtocolEvent != NULL) {
> +      gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> +    }
> +    //
> +    // Stop Redfish service discovery.
> +    //
> +    gEfiRedfishDiscoverProtocol->AbortAcquireRedfishService (
> +                                   gEfiRedfishDiscoverProtocol,
> +                                   gNetworkInterfaceInstances
> +                                   );
> +    gEfiRedfishDiscoverControllerHandle = NULL;
> +    gEfiRedfishDiscoverProtocol = NULL;
> +    gRedfishDiscoverActivated = FALSE;
> +    gRedfishServiceDiscovered = FALSE;
> +  }
> +}
> +
> +/**
> +  Callback function executed when a Redfish Config Handler Protocol is
> installed.
> +
> +  @param[in]  Event    Event whose notification function is being invoked.
> +  @param[in]  Context  Pointer to the REDFISH_CONFIG_DRIVER_DATA
> buffer.
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishConfigHandlerInstalledCallback (
> +  IN EFI_EVENT  Event,
> +  IN VOID       *Context
> +  )
> +{
> +  if (!gRedfishDiscoverActivated) {
> +    //
> +    // No Redfish service is discovered yet.
> +    //
> +    return;
> +  }
> +
> +  RedfishConfigHandlerInitialization ();
> +}
> +
> +/**
> +  Tests to see if this driver supports a given controller. If a child device is
> provided,
> +  it further tests to see if this driver supports creating a handle for the
> specified child device.
> +
> +  This function checks to see if the driver specified by This supports the
> device specified by
> +  ControllerHandle. Drivers will typically use the device path attached to
> +  ControllerHandle and/or the services from the bus I/O abstraction
> attached to
> +  ControllerHandle to determine if the driver supports ControllerHandle.
> This function
> +  may be called many times during platform initialization. In order to reduce
> boot times, the tests
> +  performed by this function must be very small, and take as little time as
> possible to execute. This
> +  function must not change the state of any hardware devices, and this
> function must be aware that the
> +  device specified by ControllerHandle may already be managed by the
> same driver or a
> +  different driver. This function must match its calls to AllocatePages() with
> FreePages(),
> +  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
> +  Because ControllerHandle may have been previously started by the same
> driver, if a protocol is
> +  already in the opened state, then it must not be closed with
> CloseProtocol(). This is required
> +  to guarantee the state of ControllerHandle is not modified by this function.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to test. This
> handle
> +                                   must support a protocol interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a
> device path.  This
> +                                   parameter is ignored by device drivers, and is optional for
> bus
> +                                   drivers. For bus drivers, if this parameter is not NULL, then
> +                                   the bus driver must determine if the bus controller
> specified
> +                                   by ControllerHandle and the child controller specified
> +                                   by RemainingDevicePath are both supported by this
> +                                   bus driver.
> +
> +  @retval EFI_SUCCESS              The device specified by ControllerHandle and
> +                                   RemainingDevicePath is supported by the driver specified
> by This.
> +  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle
> and
> +                                   RemainingDevicePath is not supported by the driver
> specified by This.
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingSupported (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  )
> +{
> +  EFI_REST_EX_PROTOCOL             *RestEx;
> +  EFI_STATUS                       Status;
> +  EFI_HANDLE                       ChildHandle;
> +
> +  ChildHandle = NULL;
> +
> +  //
> +  // Check if REST EX is ready. This just makes sure
> +  // the network stack is brought up.
> +  //
> +  Status = NetLibCreateServiceChild (
> +             ControllerHandle,
> +             This->ImageHandle,
> +             &gEfiRestExServiceBindingProtocolGuid,
> +             &ChildHandle
> +             );
> +  if (EFI_ERROR (Status)) {
> +    return EFI_UNSUPPORTED;
> +  }
> +
> +  //
> +  // Test if REST EX protocol is ready.
> +  //
> +  Status = gBS->OpenProtocol(
> +                  ChildHandle,
> +                  &gEfiRestExProtocolGuid,
> +                  (VOID**) &RestEx,
> +                  This->DriverBindingHandle,
> +                  ControllerHandle,
> +                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    Status = EFI_UNSUPPORTED;
> +  }
> +  NetLibDestroyServiceChild (
> +    ControllerHandle,
> +    This->ImageHandle,
> +    &gEfiRestExServiceBindingProtocolGuid,
> +    ChildHandle
> +    );
> +  return Status;
> +}
> +
> +/**
> +  Starts a device controller or a bus controller.
> +
> +  The Start() function is designed to be invoked from the EFI boot service
> ConnectController().
> +  As a result, much of the error checking on the parameters to Start() has
> been moved into this
> +  common boot service. It is legal to call Start() from other locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE.
> +  2. If RemainingDevicePath is not NULL, then it must be a pointer to a
> naturally aligned
> +     EFI_DEVICE_PATH_PROTOCOL.
> +  3. Prior to calling Start(), the Supported() function for the driver specified
> by This must
> +     have been called with the same calling parameters, and Supported()
> must have returned EFI_SUCCESS.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to start. This
> handle
> +                                   must support a protocol interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a
> device path.  This
> +                                   parameter is ignored by device drivers, and is optional for
> bus
> +                                   drivers. For a bus driver, if this parameter is NULL, then
> handles
> +                                   for all the children of Controller are created by this driver.
> +                                   If this parameter is not NULL and the first Device Path
> Node is
> +                                   not the End of Device Path Node, then only the handle for
> the
> +                                   child device specified by the first Device Path Node of
> +                                   RemainingDevicePath is created by this driver.
> +                                   If the first Device Path Node of RemainingDevicePath is
> +                                   the End of Device Path Node, no child handle is created by
> this
> +                                   driver.
> +
> +  @retval EFI_SUCCESS              The driver is started.
> +  @retval EFI_ALREADY_STARTED      The driver was already started.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStart (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  )
> +{
> +  VOID *ConfigHandlerRegistration;
> +
> +  if (gRedfishConfigData.Event != NULL) {
> +    return EFI_ALREADY_STARTED;
> +  }
> +
> +  gRedfishConfigData.Event = EfiCreateProtocolNotifyEvent (
> +                                &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                                TPL_CALLBACK,
> +                                RedfishConfigHandlerInstalledCallback,
> +                                (VOID *)&gRedfishConfigData,
> +                                &ConfigHandlerRegistration
> +                                );
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  Stops a device controller or a bus controller.
> +
> +  The Stop() function is designed to be invoked from the EFI boot service
> DisconnectController().
> +  As a result, much of the error checking on the parameters to Stop() has
> been moved
> +  into this common boot service. It is legal to call Stop() from other locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE that was used on a
> previous call to this
> +     same driver's Start() function.
> +  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a
> valid
> +     EFI_HANDLE. In addition, all of these handles must have been created in
> this driver's
> +     Start() function, and the Start() function must have called OpenProtocol()
> on
> +     ControllerHandle with an Attribute of
> EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
> +
> +  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL
> instance.
> +  @param[in]  ControllerHandle  A handle to the device being stopped. The
> handle must
> +                                support a bus specific I/O protocol for the driver
> +                                to use to stop the device.
> +  @param[in]  NumberOfChildren  The number of child device handles in
> ChildHandleBuffer.
> +  @param[in]  ChildHandleBuffer An array of child handles to be freed. May
> be NULL
> +                                if NumberOfChildren is 0.
> +
> +  @retval EFI_SUCCESS           The device was stopped.
> +  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a
> device error.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStop (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN UINTN                        NumberOfChildren,
> +  IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL
> +  )
> +{
> +  EFI_STATUS  Status;
> +
> +  if (ControllerHandle == gEfiRedfishDiscoverControllerHandle) {
> +    RedfishConfigStopRedfishDiscovery ();
> +  }
> +  gBS->CloseProtocol (
> +         ControllerHandle,
> +         &gEfiRedfishDiscoverProtocolGuid,
> +         gRedfishConfigData.Image,
> +         gRedfishConfigData.Image
> +         );
> +
> +  Status = RedfishConfigCommonStop ();
> +  if (EFI_ERROR (Status)) {
> +    return EFI_DEVICE_ERROR;
> +  }
> +
> +  if (gRedfishConfigData.Event != NULL) {
> +    gBS->CloseEvent (gRedfishConfigData.Event);
> +    gRedfishConfigData.Event = NULL;
> +  }
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  Callback function when Redfish service is discovered.
> +
> +  @param[in]   Event    Event whose notification function is being invoked.
> +  @param[out]  Context  Pointer to the Context buffer
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishServiceDiscoveredCallback (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_REDFISH_DISCOVERED_TOKEN *RedfishDiscoveredToken;
> +  EFI_REDFISH_DISCOVERED_INSTANCE *RedfishInstance;
> +
> +  if (gRedfishServiceDiscovered) {
> +    //
> +    // Only support one Redfish service on platform.
> +    //
> +    return;
> +  }
> +
> +  RedfishDiscoveredToken = (EFI_REDFISH_DISCOVERED_TOKEN *)Context;
> +  RedfishInstance = RedfishDiscoveredToken-
> >DiscoverList.RedfishInstances;
> +  //
> +  // Only pick up the first found Redfish service.
> +  //
> +  if (RedfishInstance->Status == EFI_SUCCESS) {
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceRestExHandle =
> RedfishInstance->Information.RedfishRestExHandle;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceVersion      =
> RedfishInstance->Information.RedfishVersion;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceLocation     =
> RedfishInstance->Information.Location;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUuid         =
> RedfishInstance->Information.Uuid;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOs           =
> RedfishInstance->Information.Os;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOsVersion    =
> RedfishInstance->Information.OsVersion;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProduct      =
> RedfishInstance->Information.Product;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProductVer   =
> RedfishInstance->Information.ProductVer;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUseHttps     =
> RedfishInstance->Information.UseHttps;
> +    gRedfishServiceDiscovered = TRUE;
> +  }
> +
> +  //
> +  // Invoke RedfishConfigHandlerInstalledCallback to execute
> +  // the initialization of Redfish Configure Handler instance.
> +  //
> +  RedfishConfigHandlerInstalledCallback (gRedfishConfigData.Event,
> &gRedfishConfigData);
> +}
> +
> +/**
> +  Callback function executed when the EFI_REDFISH_DISCOVER_PROTOCOL
> +  protocol interface is installed.
> +
> +  @param[in]   Event    Event whose notification function is being invoked.
> +  @param[out]  Context  Pointer to the Context buffer
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishDiscoverProtocolInstalled (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_STATUS Status;
> +  UINTN BufferSize;
> +  EFI_HANDLE HandleBuffer;
> +  UINTN NetworkInterfaceIndex;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE *ThisNetworkInterface;
> +  EFI_REDFISH_DISCOVERED_TOKEN           *ThisRedfishDiscoveredToken;
> +
> +  DEBUG((DEBUG_INFO, "%a: New network interface is installed on system
> by EFI Redfish discover driver.\n", __FUNCTION__));
> +
> +  BufferSize = sizeof (EFI_HANDLE);
> +  Status = gBS->LocateHandle (
> +                  ByRegisterNotify,
> +                  NULL,
> +                  gEfiRedfishDiscoverRegistration,
> +                  &BufferSize,
> +                  &HandleBuffer
> +                );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG((DEBUG_ERROR, "%a: Can't locate handle with
> EFI_REDFISH_DISCOVER_PROTOCOL installed.\n", __FUNCTION__));
> +  }
> +  gRedfishDiscoverActivated = TRUE;
> +  if (gEfiRedfishDiscoverProtocol == NULL) {
> +     gEfiRedfishDiscoverControllerHandle = HandleBuffer;
> +    //
> +    // First time to open EFI_REDFISH_DISCOVER_PROTOCOL.
> +    //
> +    Status = gBS->OpenProtocol(
> +                      gEfiRedfishDiscoverControllerHandle,
> +                      &gEfiRedfishDiscoverProtocolGuid,
> +                      (VOID **)&gEfiRedfishDiscoverProtocol,
> +                      gRedfishConfigData.Image,
> +                      gRedfishConfigData.Image,
> +                      EFI_OPEN_PROTOCOL_BY_DRIVER
> +                    );
> +    if (EFI_ERROR (Status)) {
> +      gEfiRedfishDiscoverProtocol = NULL;
> +      gRedfishDiscoverActivated = FALSE;
> +      DEBUG((DEBUG_ERROR, "%a: Can't locate
> EFI_REDFISH_DISCOVER_PROTOCOL.\n", __FUNCTION__));
> +      return;
> +    }
> +  }
> +  //
> +  // Check the new found network interface.
> +  //
> +  if (gNetworkInterfaceInstances != NULL) {
> +    FreePool (gNetworkInterfaceInstances);
> +  }
> +  Status = gEfiRedfishDiscoverProtocol->GetNetworkInterfaceList(
> +                                          gEfiRedfishDiscoverProtocol,
> +                                          gRedfishConfigData.Image,
> +                                          &gNumberOfNetworkInterfaces,
> +                                          &gNetworkInterfaceInstances
> +                                          );
> +  if (EFI_ERROR (Status) || gNumberOfNetworkInterfaces == 0) {
> +    DEBUG((DEBUG_ERROR, "%a: No network interfaces found on the
> handle.\n", __FUNCTION__));
> +    return;
> +  }
> +
> +  gRedfishDiscoveredToken = AllocateZeroPool
> (gNumberOfNetworkInterfaces * sizeof
> (EFI_REDFISH_DISCOVERED_TOKEN));
> +  if (gRedfishDiscoveredToken == NULL) {
> +    DEBUG((DEBUG_ERROR, "%a: Not enough memory for
> EFI_REDFISH_DISCOVERED_TOKEN.\n", __FUNCTION__));
> +    return;
> +  }
> +
> +  ThisNetworkInterface = gNetworkInterfaceInstances;
> +  ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
> +  //
> +  // Loop to discover Redfish service on each network interface.
> +  //
> +  for (NetworkInterfaceIndex = 0; NetworkInterfaceIndex <
> gNumberOfNetworkInterfaces; NetworkInterfaceIndex ++) {
> +    //
> +    // Initial this Redfish Discovered Token
> +    //
> +    Status = gBS->CreateEvent (
> +                    EVT_NOTIFY_SIGNAL,
> +                    TPL_CALLBACK,
> +                    RedfishServiceDiscoveredCallback,
> +                    (VOID *)ThisRedfishDiscoveredToken,
> +                    &ThisRedfishDiscoveredToken->Event
> +                  );
> +    if (EFI_ERROR (Status)) {
> +      DEBUG((DEBUG_ERROR, "%a: Failed to create event for Redfish
> discovered token.\n", __FUNCTION__));
> +      goto ErrorReturn;
> +    }
> +    ThisRedfishDiscoveredToken->Signature =
> REDFISH_DISCOVER_TOKEN_SIGNATURE;
> +    ThisRedfishDiscoveredToken->DiscoverList.NumberOfServiceFound = 0;
> +    ThisRedfishDiscoveredToken->DiscoverList.RedfishInstances = NULL;
> +    //
> +    // Acquire for Redfish service which is reported by
> +    // Redfish Host Interface.
> +    //
> +    Status = gEfiRedfishDiscoverProtocol->AcquireRedfishService(
> +                                             gEfiRedfishDiscoverProtocol,
> +                                             gRedfishConfigData.Image,
> +                                             ThisNetworkInterface,
> +                                             EFI_REDFISH_DISCOVER_HOST_INTERFACE,
> +                                             ThisRedfishDiscoveredToken
> +                                             );
> +    ThisNetworkInterface ++;
> +    ThisRedfishDiscoveredToken ++;
> +  }
> +  if (EFI_ERROR (Status)) {
> +    DEBUG((DEBUG_ERROR, "%a: Acquire Redfish service fail.\n",
> __FUNCTION__));
> +    goto ErrorReturn;
> +  }
> +  return;
> +
> +ErrorReturn:
> +  if (gRedfishDiscoveredToken != NULL) {
> +    FreePool(gRedfishDiscoveredToken);
> +  }
> +}
> +
> +/**
> +  Unloads an image.
> +
> +  @param[in]  ImageHandle       Handle that identifies the image to be
> unloaded.
> +
> +  @retval EFI_SUCCESS           The image has been unloaded.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigHandlerDriverUnload (
> +  IN EFI_HANDLE  ImageHandle
> +  )
> +{
> +  EFI_REDFISH_DISCOVERED_TOKEN *ThisRedfishDiscoveredToken;
> +  UINTN NumberOfNetworkInterfacesIndex;
> +
> +  RedfishConfigDriverCommonUnload (ImageHandle);
> +
> +  RedfishConfigStopRedfishDiscovery ();
> +  if (gRedfishDiscoveredToken != NULL) {
> +    ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
> +    for (NumberOfNetworkInterfacesIndex = 0;
> NumberOfNetworkInterfacesIndex < gNumberOfNetworkInterfaces;
> NumberOfNetworkInterfacesIndex ++) {
> +      if (ThisRedfishDiscoveredToken->Event != NULL) {
> +        gBS->CloseEvent (ThisRedfishDiscoveredToken->Event);
> +      }
> +      FreePool (ThisRedfishDiscoveredToken);
> +      ThisRedfishDiscoveredToken ++;
> +    }
> +    gRedfishDiscoveredToken = NULL;
> +  }
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This is the declaration of an EFI image entry point. This entry point is
> +  the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
> +  both device drivers and bus drivers.
> +
> +  @param[in]  ImageHandle       The firmware allocated handle for the UEFI
> image.
> +  @param[in]  SystemTable       A pointer to the EFI System Table.
> +
> +  @retval EFI_SUCCESS           The operation completed successfully.
> +  @retval Others                An unexpected error occurred.
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigHandlerDriverEntryPoint (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  )
> +{
> +  EFI_STATUS    Status;
> +
> +  ZeroMem ((VOID *)&gRedfishConfigData, sizeof
> (REDFISH_CONFIG_DRIVER_DATA));
> +  gRedfishConfigData.Image = ImageHandle;
> +  //
> +  // Register event for EFI_REDFISH_DISCOVER_PROTOCOL protocol install
> +  // notification.
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  RedfishDiscoverProtocolInstalled,
> +                  NULL,
> +                  &gEfiRedfishDiscoverProtocolGuid,
> +                  &gEfiRedfishDiscoverProtocolEvent
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to create event for the installation of
> EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
> +    return Status;
> +  }
> +  Status = gBS->RegisterProtocolNotify (
> +                  &gEfiRedfishDiscoverProtocolGuid,
> +                  gEfiRedfishDiscoverProtocolEvent,
> +                  &gEfiRedfishDiscoverRegistration
> +                );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to register event for the installation of
> EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
> +    return Status;
> +  }
> +
> +  Status = RedfishConfigCommonInit (ImageHandle, SystemTable);
> +  if (EFI_ERROR (Status)) {
> +    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> +    gEfiRedfishDiscoverProtocolEvent = NULL;
> +    return Status;
> +  }
> +
> +  //
> +  // Install UEFI Driver Model protocol(s).
> +  //
> +  Status = EfiLibInstallDriverBinding (
> +             ImageHandle,
> +             SystemTable,
> +             &gRedfishConfigDriverBinding,
> +             ImageHandle
> +             );
> +  if (EFI_ERROR (Status)) {
> +    gBS->CloseEvent (gEndOfDxeEvent);
> +    gEndOfDxeEvent = NULL;
> +    gBS->CloseEvent (gExitBootServiceEvent);
> +    gExitBootServiceEvent = NULL;
> +    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> +    gEfiRedfishDiscoverProtocolEvent = NULL;
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to install EFI Binding Protocol of EFI
> Redfish Config driver.", __FUNCTION__));
> +    return Status;
> +  }
> +  return Status;
> +}
> +
> --
> 2.17.1
> 
> 
> 
> 
> 



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Reviewed-by: Nickle Wang <nickle.wang@hpe.com>

Got it. Thanks Abner.

Nickle

-----Original Message-----
From: Chang, Abner (HPS SW/FW Technologist) <abner.chang@hpe.com> 
Sent: Monday, April 12, 2021 12:20 PM
To: Wang, Nickle (HPS SW) <nickle.wang@hpe.com>; devel@edk2.groups.io
Subject: RE: [edk2-devel] [PATCH] RedfishPkg/RedfishConfigHandler: EDKII RedfishConfigHandler Protocol

Ah, yes. I will revise the copyrights in Redfish.fdf.inc and RedfishComponents.dsc.inc when merge it.
Thanks for catching this.

Abner

> -----Original Message-----
> From: Wang, Nickle (HPS SW)
> Sent: Monday, April 12, 2021 11:53 AM
> To: devel@edk2.groups.io; Chang, Abner (HPS SW/FW Technologist)
> <abner.chang@hpe.com>
> Subject: RE: [edk2-devel] [PATCH] RedfishPkg/RedfishConfigHandler: EDKII
> RedfishConfigHandler Protocol
> 
> Looks good to me. But for the copyright, I think it would be "2020-2021", right?
> For example:
> 
> -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> 
> Thanks,
> Nickle
> 
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Abner
> Chang
> Sent: Friday, March 26, 2021 1:55 PM
> To: devel@edk2.groups.io
> Cc: Wang, Nickle (HPS SW) <nickle.wang@hpe.com>
> Subject: [edk2-devel] [PATCH] RedfishPkg/RedfishConfigHandler: EDKII
> RedfishConfigHandler Protocol
> 
> The driver is used to manage EDK2 Redfish Configuration Handler
> Protocol installed by EDK2 Redfish feature drivers.
> This is the EDK2 Redfish client driver written based on the EDK2
> Redfish foundation to initialize EDK2 Redfish feature drivers.
> 
> EDK2 Redfish feature drivers are used to provision/consume/update
> the firmware owns Redfish properties during system power on
> initialization.
> 
> RedfishConfigHandlerCommon.c has the common code for the driver
> instances used in different EDK2 boot phases or used by different
> driver models in the future contribution.
> 
> Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
> Signed-off-by: Siyuan Fu <siyuan.fu@intel.com>
> Signed-off-by: Fan Wang <fan.wang@intel.com>
> Signed-off-by: Abner Chang <abner.chang@hpe.com>
> 
> Cc: Nickle Wang <nickle.wang@hpe.com>
> ---
>  RedfishPkg/RedfishComponents.dsc.inc          |   3 +-
>  RedfishPkg/Redfish.fdf.inc                    |   3 +-
>  .../RedfishConfigHandlerDriver.inf            |  60 ++
>  .../RedfishConfigHandlerCommon.h              | 101 +++
>  .../RedfishConfigHandlerDriver.h              | 159 +++++
>  .../RedfishConfigHandlerCommon.c              | 265 ++++++++
>  .../RedfishConfigHandlerDriver.c              | 587 ++++++++++++++++++
>  7 files changed, 1176 insertions(+), 2 deletions(-)
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
>  create mode 100644
> RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> 
> diff --git a/RedfishPkg/RedfishComponents.dsc.inc
> b/RedfishPkg/RedfishComponents.dsc.inc
> index 08f1d3bc32..d0116f065c 100644
> --- a/RedfishPkg/RedfishComponents.dsc.inc
> +++ b/RedfishPkg/RedfishComponents.dsc.inc
> @@ -6,7 +6,7 @@
>  # of EDKII Redfish drivers according to the value of flags described in
>  # "RedfishDefines.dsc.inc".
>  #
> -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
>  #
>  #    SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -17,4 +17,5 @@
>    RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
>    RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
>    RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
> +  RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
>  !endif
> diff --git a/RedfishPkg/Redfish.fdf.inc b/RedfishPkg/Redfish.fdf.inc
> index a64fd119a9..9673246b3f 100644
> --- a/RedfishPkg/Redfish.fdf.inc
> +++ b/RedfishPkg/Redfish.fdf.inc
> @@ -5,7 +5,7 @@
>  # by using "!include RedfishPkg/RedfisLibs.fdf.inc" to specify the module
> instances
>  # to be built in the firmware volume.
>  #
> -# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
> +# (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
>  #
>  #    SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -15,4 +15,5 @@
>    INF RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.inf
>    INF RedfishPkg/RedfishRestExDxe/RedfishRestExDxe.inf
>    INF RedfishPkg/RedfishCredentialDxe/RedfishCredentialDxe.inf
> +  INF RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
>  !endif
> diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> new file mode 100644
> index 0000000000..def91c7531
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.inf
> @@ -0,0 +1,60 @@
> +## @file
> +#  INF file for the UEFI driver model Redfish Configuration Handler
> +#  Driver.
> +#
> +#  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> +#  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +#
> +#  SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +##
> +
> +[Defines]
> +  INF_VERSION               = 0x0001000b
> +  BASE_NAME                 = RedfishConfigHandlerDriver
> +  FILE_GUID                 = 6e881000-5749-11e8-9bf0-8cdcd426c973
> +  MODULE_TYPE               = UEFI_DRIVER
> +  VERSION_STRING            = 1.0
> +  ENTRY_POINT               = RedfishConfigHandlerDriverEntryPoint
> +  UNLOAD_IMAGE              = RedfishConfigHandlerDriverUnload
> +
> +#
> +#  VALID_ARCHITECTURES      = IA32 X64 ARM AARCH64 RISCV64
> +#
> +
> +[Packages]
> +  MdePkg/MdePkg.dec
> +  MdeModulePkg/MdeModulePkg.dec
> +  NetworkPkg/NetworkPkg.dec
> +  RedfishPkg/RedfishPkg.dec
> +
> +[Sources]
> +  RedfishConfigHandlerDriver.h
> +  RedfishConfigHandlerDriver.c
> +  RedfishConfigHandlerCommon.h
> +  RedfishConfigHandlerCommon.c
> +
> +[LibraryClasses]
> +  BaseLib
> +  BaseMemoryLib
> +  DebugLib
> +  UefiLib
> +  MemoryAllocationLib
> +  NetLib
> +  UefiBootServicesTableLib
> +  UefiDriverEntryPoint
> +
> +[Protocols]
> +  gEfiRedfishDiscoverProtocolGuid         ## CONSUMES
> +  gEfiRestExServiceBindingProtocolGuid
> +  gEfiRestExProtocolGuid                  ## CONSUMES
> +  gEdkIIRedfishCredentialProtocolGuid     ## CONSUMES
> +  gEdkIIRedfishConfigHandlerProtocolGuid  ## CONSUMES
> +
> +[Guids]
> +  gEfiEventExitBootServicesGuid           ## CONSUMES ## Event
> +  gEfiEndOfDxeEventGroupGuid              ## CONSUMES ## Event
> +
> +[Depex]
> +  TRUE
> +
> diff --git
> a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> new file mode 100644
> index 0000000000..5e46c42219
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.h
> @@ -0,0 +1,101 @@
> +/** @file
> +  Common Header file for Redfish Configuration Handler UEFI driver
> +  and DXE driver.
> +
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#ifndef EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
> +#define EFI_REDFISH_CONFIG_HANDLER_COMMON_H_
> +
> +#include <Uefi.h>
> +
> +//
> +// Libraries
> +//
> +#include <Library/BaseLib.h>
> +#include <Library/BaseMemoryLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/MemoryAllocationLib.h>
> +#include <Library/NetLib.h>
> +#include <Library/UefiBootServicesTableLib.h>
> +#include <Library/UefiDriverEntryPoint.h>
> +#include <Library/UefiLib.h>
> +
> +//
> +// Consumed Protocols
> +//
> +#include <Protocol/EdkIIRedfishCredential.h>
> +#include <Protocol/EdkIIRedfishConfigHandler.h>
> +
> +//
> +// Driver Version
> +//
> +#define REDFISH_CONFIG_VERSION  0x00000001
> +
> +///
> +///  Internal structure used by Redfish Config DXE driver.
> +///
> +typedef struct {
> +  UINT32        CallerId;  ///< Caller ID used to indicate Redfish Config Handler
> +                           ///< has been initiated
> +  EFI_HANDLE    Image;     ///< Image handle of Redfish Config Driver
> +  EFI_EVENT     Event;     ///< Event for the notification of
> EFI_REDFISH_CONFIG_HANDLER_PROTOCOL
> +  REDFISH_CONFIG_SERVICE_INFORMATION RedfishServiceInfo; ///
> Redfish Service information discovered
> +} REDFISH_CONFIG_DRIVER_DATA;
> +
> +/**
> +  Common code of unloading image for both UEFI/DXE Redfish
> Configuration drivers.
> +
> +  @param[in]  ImageHandle       Handle that identifies the image to be
> unloaded.
> +
> +  @retval EFI_SUCCESS           The image has been unloaded.
> +
> +**/
> +EFI_STATUS
> +RedfishConfigDriverCommonUnload (
> +  IN EFI_HANDLE  ImageHandle
> +  );
> +
> +/**
> +  This is the common code for Redfish configuration UEFI and DXE driver
> +  initialization.
> +
> +  @param[in]  ImageHandle       The firmware allocated handle for the UEFI
> image.
> +  @param[in]  SystemTable       A pointer to the EFI System Table.
> +
> +  @retval EFI_SUCCESS           The operation completed successfully.
> +  @retval Others                An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonInit (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  );
> +
> +/**
> +  This is the common code to stop EDK2 Redfish feature driver.
> +
> +  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
> +                         stopped.
> +  @retval Others         An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonStop (
> +  VOID
> +);
> +
> +/**
> +  Callback function executed when a Redfish Config Handler Protocol is
> installed
> +  by EDK2 Redfish Feature Drivers.
> +
> +**/
> +VOID
> +RedfishConfigHandlerInitialization (
> +  VOID
> +  );
> +
> +#endif
> diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> new file mode 100644
> index 0000000000..58202c41e2
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.h
> @@ -0,0 +1,159 @@
> +/** @file
> +  Header file of Redfish Configuration Handler UEFI driver.
> +
> +  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#ifndef EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
> +#define EFI_REDFISH_CONFIG_HANDLER_DRIVER_H_
> +
> +#include "RedfishConfigHandlerCommon.h"
> +
> +//
> +// UEFI Driver Model Protocols
> +//
> +
> +#include <Protocol/DriverBinding.h>
> +#include <Protocol/RedfishDiscover.h>
> +#include <Protocol/RestEx.h>
> +
> +//
> +// Protocol instances
> +//
> +extern EFI_DRIVER_BINDING_PROTOCOL  gRedfishConfigDriverBinding;
> +
> +extern REDFISH_CONFIG_DRIVER_DATA        gRedfishConfigData;
> +extern EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential;
> +extern EFI_EVENT                         gEndOfDxeEvent;
> +extern EFI_EVENT                         gExitBootServiceEvent;
> +
> +/**
> +  Tests to see if this driver supports a given controller. If a child device is
> provided,
> +  it further tests to see if this driver supports creating a handle for the
> specified child device.
> +
> +  This function checks to see if the driver specified by This supports the
> device specified by
> +  ControllerHandle. Drivers will typically use the device path attached to
> +  ControllerHandle and/or the services from the bus I/O abstraction
> attached to
> +  ControllerHandle to determine if the driver supports ControllerHandle.
> This function
> +  may be called many times during platform initialization. In order to reduce
> boot times, the tests
> +  performed by this function must be very small, and take as little time as
> possible to execute. This
> +  function must not change the state of any hardware devices, and this
> function must be aware that the
> +  device specified by ControllerHandle may already be managed by the
> same driver or a
> +  different driver. This function must match its calls to AllocatePages() with
> FreePages(),
> +  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
> +  Because ControllerHandle may have been previously started by the same
> driver, if a protocol is
> +  already in the opened state, then it must not be closed with
> CloseProtocol(). This is required
> +  to guarantee the state of ControllerHandle is not modified by this function.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to test. This
> handle
> +                                   must support a protocol interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a
> device path.  This
> +                                   parameter is ignored by device drivers, and is optional for
> bus
> +                                   drivers. For bus drivers, if this parameter is not NULL, then
> +                                   the bus driver must determine if the bus controller
> specified
> +                                   by ControllerHandle and the child controller specified
> +                                   by RemainingDevicePath are both supported by this
> +                                   bus driver.
> +
> +  @retval EFI_SUCCESS              The device specified by ControllerHandle and
> +                                   RemainingDevicePath is supported by the driver specified
> by This.
> +  @retval EFI_ALREADY_STARTED      The device specified by
> ControllerHandle and
> +                                   RemainingDevicePath is already being managed by the
> driver
> +                                   specified by This.
> +  @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle
> and
> +                                   RemainingDevicePath is already being managed by a
> different
> +                                   driver or an application that requires exclusive access.
> +                                   Currently not implemented.
> +  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle
> and
> +                                   RemainingDevicePath is not supported by the driver
> specified by This.
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingSupported (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  );
> +
> +/**
> +  Starts a device controller or a bus controller.
> +
> +  The Start() function is designed to be invoked from the EFI boot service
> ConnectController().
> +  As a result, much of the error checking on the parameters to Start() has
> been moved into this
> +  common boot service. It is legal to call Start() from other locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE.
> +  2. If RemainingDevicePath is not NULL, then it must be a pointer to a
> naturally aligned
> +     EFI_DEVICE_PATH_PROTOCOL.
> +  3. Prior to calling Start(), the Supported() function for the driver specified
> by This must
> +     have been called with the same calling parameters, and Supported()
> must have returned EFI_SUCCESS.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to start. This
> handle
> +                                   must support a protocol interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a
> device path.  This
> +                                   parameter is ignored by device drivers, and is optional for
> bus
> +                                   drivers. For a bus driver, if this parameter is NULL, then
> handles
> +                                   for all the children of Controller are created by this driver.
> +                                   If this parameter is not NULL and the first Device Path
> Node is
> +                                   not the End of Device Path Node, then only the handle for
> the
> +                                   child device specified by the first Device Path Node of
> +                                   RemainingDevicePath is created by this driver.
> +                                   If the first Device Path Node of RemainingDevicePath is
> +                                   the End of Device Path Node, no child handle is created by
> this
> +                                   driver.
> +
> +  @retval EFI_SUCCESS              The driver is started.
> +  @retval EFI_ALREADY_STARTED      The driver was already started.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStart (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  );
> +
> +/**
> +  Stops a device controller or a bus controller.
> +
> +  The Stop() function is designed to be invoked from the EFI boot service
> DisconnectController().
> +  As a result, much of the error checking on the parameters to Stop() has
> been moved
> +  into this common boot service. It is legal to call Stop() from other locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE that was used on a
> previous call to this
> +     same driver's Start() function.
> +  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a
> valid
> +     EFI_HANDLE. In addition, all of these handles must have been created in
> this driver's
> +     Start() function, and the Start() function must have called OpenProtocol()
> on
> +     ControllerHandle with an Attribute of
> EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
> +
> +  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL
> instance.
> +  @param[in]  ControllerHandle  A handle to the device being stopped. The
> handle must
> +                                support a bus specific I/O protocol for the driver
> +                                to use to stop the device.
> +  @param[in]  NumberOfChildren  The number of child device handles in
> ChildHandleBuffer.
> +  @param[in]  ChildHandleBuffer An array of child handles to be freed. May
> be NULL
> +                                if NumberOfChildren is 0.
> +
> +  @retval EFI_SUCCESS           The device was stopped.
> +  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a
> device error.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStop (
> +  IN  EFI_DRIVER_BINDING_PROTOCOL *This,
> +  IN  EFI_HANDLE                  ControllerHandle,
> +  IN  UINTN                       NumberOfChildren,
> +  IN  EFI_HANDLE                  *ChildHandleBuffer OPTIONAL
> +  );
> +#endif
> diff --git
> a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> new file mode 100644
> index 0000000000..ff465d9ff3
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerCommon.c
> @@ -0,0 +1,265 @@
> +/** @file
> +  The common code of EDKII Redfish Configuration Handler driver.
> +
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "RedfishConfigHandlerCommon.h"
> +
> +REDFISH_CONFIG_DRIVER_DATA      gRedfishConfigData; // Only one
> Redfish service supproted
> +                                                    // on platform for the BIOS
> +                                                    // Redfish configuration.
> +EFI_EVENT  gEndOfDxeEvent = NULL;
> +EFI_EVENT  gExitBootServiceEvent = NULL;
> +EDKII_REDFISH_CREDENTIAL_PROTOCOL *gCredential = NULL;
> +
> +/**
> +  Callback function executed when the EndOfDxe event group is signaled.
> +
> +  @param[in]   Event    Event whose notification function is being invoked.
> +  @param[out]  Context  Pointer to the Context buffer.
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishConfigOnEndOfDxe (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_STATUS                          Status;
> +
> +  Status = gCredential->StopService (gCredential,
> ServiceStopTypeSecureBootDisabled);
> +  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
> +    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop
> service on EndOfDxe: %r", Status));
> +  }
> +
> +  //
> +  // Close event, so it will not be invoked again.
> +  //
> +  gBS->CloseEvent (gEndOfDxeEvent);
> +  gEndOfDxeEvent = NULL;
> +}
> +
> +/**
> +  Callback function executed when the ExitBootService event group is
> signaled.
> +
> +  @param[in]   Event    Event whose notification function is being invoked.
> +  @param[out]  Context  Pointer to the Context buffer
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishConfigOnExitBootService (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_STATUS                          Status;
> +
> +  Status = gCredential->StopService (gCredential,
> ServiceStopTypeExitBootService);
> +  if (EFI_ERROR(Status) && Status != EFI_UNSUPPORTED) {
> +    DEBUG ((DEBUG_ERROR, "Redfish credential protocol faied to stop
> service on ExitBootService: %r", Status));
> +  }
> +}
> +
> +/**
> +  Unloads an image.
> +
> +  @param[in]  ImageHandle       Handle that identifies the image to be
> unloaded.
> +
> +  @retval EFI_SUCCESS           The image has been unloaded.
> +
> +**/
> +EFI_STATUS
> +RedfishConfigDriverCommonUnload (
> +  IN EFI_HANDLE  ImageHandle
> +  )
> +{
> +  if (gEndOfDxeEvent != NULL) {
> +    gBS->CloseEvent (gEndOfDxeEvent);
> +    gEndOfDxeEvent = NULL;
> +  }
> +
> +  if (gExitBootServiceEvent != NULL) {
> +    gBS->CloseEvent (gExitBootServiceEvent);
> +    gExitBootServiceEvent = NULL;
> +  }
> +
> +  if (gRedfishConfigData.Event != NULL) {
> +    gBS->CloseEvent (gRedfishConfigData.Event);
> +    gRedfishConfigData.Event = NULL;
> +  }
> +
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This is the common code for Redfish configuration UEFI and DXE driver
> +  initialization.
> +
> +  @param[in]  ImageHandle       The firmware allocated handle for the UEFI
> image.
> +  @param[in]  SystemTable       A pointer to the EFI System Table.
> +
> +  @retval EFI_SUCCESS           The operation completed successfully.
> +  @retval Others                An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonInit (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  )
> +{
> +  EFI_STATUS Status;
> +  //
> +  // Locate Redfish Credential Protocol to get credential for
> +  // accessing to Redfish service.
> +  //
> +  Status = gBS->LocateProtocol (&gEdkIIRedfishCredentialProtocolGuid,
> NULL, (VOID **) &gCredential);
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_INFO, "%a: No Redfish Credential Protocol is installed on
> system.", __FUNCTION__));
> +    return Status;
> +  }
> +  //
> +  // Create EndOfDxe Event.
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  RedfishConfigOnEndOfDxe,
> +                  NULL,
> +                  &gEfiEndOfDxeEventGroupGuid,
> +                  &gEndOfDxeEvent
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to register End Of DXE event.",
> __FUNCTION__));
> +    return Status;
> +  }
> +  //
> +  // Create Exit Boot Service event.
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  RedfishConfigOnExitBootService,
> +                  NULL,
> +                  &gEfiEventExitBootServicesGuid,
> +                  &gExitBootServiceEvent
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    gBS->CloseEvent (gEndOfDxeEvent);
> +    gEndOfDxeEvent = NULL;
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to register Exit Boot Service event.",
> __FUNCTION__));
> +    return Status;
> +  }
> +  return EFI_SUCCESS;
> +}
> +/**
> +  This is the common code to stop EDK2 Redfish feature driver.
> +
> +  @retval EFI_SUCCESS    All EDK2 Redfish feature drivers are
> +                         stopped.
> +  @retval Others         An unexpected error occurred.
> +**/
> +EFI_STATUS
> +RedfishConfigCommonStop (
> +  VOID
> +)
> +{
> +  EFI_STATUS   Status;
> +  EFI_HANDLE  *HandleBuffer;
> +  UINTN        NumberOfHandles;
> +  UINTN        Index;
> +  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
> +
> +  Status = gBS->LocateHandleBuffer (
> +                  ByProtocol,
> +                  &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                  NULL,
> +                  &NumberOfHandles,
> +                  &HandleBuffer
> +                  );
> +  if (EFI_ERROR (Status) && Status != EFI_NOT_FOUND) {
> +    return Status;
> +  }
> +
> +  Status = EFI_SUCCESS;
> +  for (Index = 0; Index < NumberOfHandles; Index++) {
> +    Status = gBS->HandleProtocol (
> +                     HandleBuffer[Index],
> +                     &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                     (VOID**) &ConfigHandler
> +                     );
> +    ASSERT_EFI_ERROR (Status);
> +
> +    Status = ConfigHandler->Stop (ConfigHandler);
> +    if (EFI_ERROR (Status) && Status != EFI_UNSUPPORTED) {
> +      DEBUG ((DEBUG_ERROR, "ERROR: Failed to stop Redfish config handler
> %p.\n", ConfigHandler));
> +      break;
> +    }
> +  }
> +  return Status;
> +}
> +/**
> +  Callback function executed when a Redfish Config Handler Protocol is
> installed
> +  by EDK2 Redfish Feature Drivers.
> +
> +**/
> +VOID
> +RedfishConfigHandlerInitialization (
> +  VOID
> +  )
> +{
> +  EFI_STATUS                            Status;
> +  EFI_HANDLE                            *HandleBuffer;
> +  UINTN                                 NumberOfHandles;
> +  EDKII_REDFISH_CONFIG_HANDLER_PROTOCOL *ConfigHandler;
> +  UINTN                                 Index;
> +  UINT32                                Id;
> +
> +  Status = gBS->LocateHandleBuffer (
> +                  ByProtocol,
> +                  &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                  NULL,
> +                  &NumberOfHandles,
> +                  &HandleBuffer
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    return;
> +  }
> +
> +  for (Index = 0; Index < NumberOfHandles; Index++) {
> +    Status = gBS->HandleProtocol (
> +                    HandleBuffer [Index],
> +                    &gEfiCallerIdGuid,
> +                    (VOID **) &Id
> +                    );
> +    if (!EFI_ERROR (Status)) {
> +      continue;
> +    }
> +
> +    Status = gBS->HandleProtocol (
> +                     HandleBuffer [Index],
> +                     &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                     (VOID**) &ConfigHandler
> +                     );
> +    ASSERT_EFI_ERROR (Status);
> +    Status = ConfigHandler->Init (ConfigHandler,
> &gRedfishConfigData.RedfishServiceInfo);
> +    if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
> +      DEBUG ((DEBUG_ERROR, "ERROR: Failed to init Redfish config handler
> %p.\n", ConfigHandler));
> +    }
> +    //
> +    // Install caller ID to indicate Redfish Configure Handler is initialized.
> +    //
> +    Status = gBS->InstallProtocolInterface (
> +                  &HandleBuffer [Index],
> +                  &gEfiCallerIdGuid,
> +                  EFI_NATIVE_INTERFACE,
> +                  (VOID *)&gRedfishConfigData.CallerId
> +                  );
> +    ASSERT_EFI_ERROR (Status);
> +  }
> +}
> diff --git a/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> new file mode 100644
> index 0000000000..51378dff4f
> --- /dev/null
> +++ b/RedfishPkg/RedfishConfigHandler/RedfishConfigHandlerDriver.c
> @@ -0,0 +1,587 @@
> +/** @file
> +  The UEFI driver model driver which is responsible for locating the
> +  Redfish service through Redfish host interface and executing EDKII
> +  Redfish feature drivers.
> +
> +  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> +  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "RedfishConfigHandlerDriver.h"
> +
> +EFI_EVENT  gEfiRedfishDiscoverProtocolEvent = NULL;
> +
> +//
> +// Variables for using RFI Redfish Discover Protocol
> +//
> +VOID                             *gEfiRedfishDiscoverRegistration;
> +EFI_HANDLE                       gEfiRedfishDiscoverControllerHandle = NULL;
> +EFI_REDFISH_DISCOVER_PROTOCOL    *gEfiRedfishDiscoverProtocol = NULL;
> +BOOLEAN                          gRedfishDiscoverActivated = FALSE;
> +BOOLEAN                          gRedfishServiceDiscovered = FALSE;
> +//
> +// Network interfaces discovered by EFI Redfish Discover Protocol.
> +//
> +UINTN                                   gNumberOfNetworkInterfaces;
> +EFI_REDFISH_DISCOVER_NETWORK_INTERFACE
> *gNetworkInterfaceInstances = NULL;
> +EFI_REDFISH_DISCOVERED_TOKEN            *gRedfishDiscoveredToken = NULL;
> +
> +///
> +/// Driver Binding Protocol instance
> +///
> +EFI_DRIVER_BINDING_PROTOCOL gRedfishConfigDriverBinding = {
> +  RedfishConfigDriverBindingSupported,
> +  RedfishConfigDriverBindingStart,
> +  RedfishConfigDriverBindingStop,
> +  REDFISH_CONFIG_VERSION,
> +  NULL,
> +  NULL
> +};
> +
> +/**
> +  Stop acquiring Redfish service.
> +
> +**/
> +VOID
> +RedfishConfigStopRedfishDiscovery (
> +  VOID
> +)
> +{
> +  if (gRedfishDiscoverActivated) {
> +    //
> +    // No more EFI Discover Protocol.
> +    //
> +    if (gEfiRedfishDiscoverProtocolEvent != NULL) {
> +      gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> +    }
> +    //
> +    // Stop Redfish service discovery.
> +    //
> +    gEfiRedfishDiscoverProtocol->AbortAcquireRedfishService (
> +                                   gEfiRedfishDiscoverProtocol,
> +                                   gNetworkInterfaceInstances
> +                                   );
> +    gEfiRedfishDiscoverControllerHandle = NULL;
> +    gEfiRedfishDiscoverProtocol = NULL;
> +    gRedfishDiscoverActivated = FALSE;
> +    gRedfishServiceDiscovered = FALSE;
> +  }
> +}
> +
> +/**
> +  Callback function executed when a Redfish Config Handler Protocol is
> installed.
> +
> +  @param[in]  Event    Event whose notification function is being invoked.
> +  @param[in]  Context  Pointer to the REDFISH_CONFIG_DRIVER_DATA
> buffer.
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishConfigHandlerInstalledCallback (
> +  IN EFI_EVENT  Event,
> +  IN VOID       *Context
> +  )
> +{
> +  if (!gRedfishDiscoverActivated) {
> +    //
> +    // No Redfish service is discovered yet.
> +    //
> +    return;
> +  }
> +
> +  RedfishConfigHandlerInitialization ();
> +}
> +
> +/**
> +  Tests to see if this driver supports a given controller. If a child device is
> provided,
> +  it further tests to see if this driver supports creating a handle for the
> specified child device.
> +
> +  This function checks to see if the driver specified by This supports the
> device specified by
> +  ControllerHandle. Drivers will typically use the device path attached to
> +  ControllerHandle and/or the services from the bus I/O abstraction
> attached to
> +  ControllerHandle to determine if the driver supports ControllerHandle.
> This function
> +  may be called many times during platform initialization. In order to reduce
> boot times, the tests
> +  performed by this function must be very small, and take as little time as
> possible to execute. This
> +  function must not change the state of any hardware devices, and this
> function must be aware that the
> +  device specified by ControllerHandle may already be managed by the
> same driver or a
> +  different driver. This function must match its calls to AllocatePages() with
> FreePages(),
> +  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().
> +  Because ControllerHandle may have been previously started by the same
> driver, if a protocol is
> +  already in the opened state, then it must not be closed with
> CloseProtocol(). This is required
> +  to guarantee the state of ControllerHandle is not modified by this function.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to test. This
> handle
> +                                   must support a protocol interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a
> device path.  This
> +                                   parameter is ignored by device drivers, and is optional for
> bus
> +                                   drivers. For bus drivers, if this parameter is not NULL, then
> +                                   the bus driver must determine if the bus controller
> specified
> +                                   by ControllerHandle and the child controller specified
> +                                   by RemainingDevicePath are both supported by this
> +                                   bus driver.
> +
> +  @retval EFI_SUCCESS              The device specified by ControllerHandle and
> +                                   RemainingDevicePath is supported by the driver specified
> by This.
> +  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle
> and
> +                                   RemainingDevicePath is not supported by the driver
> specified by This.
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingSupported (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  )
> +{
> +  EFI_REST_EX_PROTOCOL             *RestEx;
> +  EFI_STATUS                       Status;
> +  EFI_HANDLE                       ChildHandle;
> +
> +  ChildHandle = NULL;
> +
> +  //
> +  // Check if REST EX is ready. This just makes sure
> +  // the network stack is brought up.
> +  //
> +  Status = NetLibCreateServiceChild (
> +             ControllerHandle,
> +             This->ImageHandle,
> +             &gEfiRestExServiceBindingProtocolGuid,
> +             &ChildHandle
> +             );
> +  if (EFI_ERROR (Status)) {
> +    return EFI_UNSUPPORTED;
> +  }
> +
> +  //
> +  // Test if REST EX protocol is ready.
> +  //
> +  Status = gBS->OpenProtocol(
> +                  ChildHandle,
> +                  &gEfiRestExProtocolGuid,
> +                  (VOID**) &RestEx,
> +                  This->DriverBindingHandle,
> +                  ControllerHandle,
> +                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    Status = EFI_UNSUPPORTED;
> +  }
> +  NetLibDestroyServiceChild (
> +    ControllerHandle,
> +    This->ImageHandle,
> +    &gEfiRestExServiceBindingProtocolGuid,
> +    ChildHandle
> +    );
> +  return Status;
> +}
> +
> +/**
> +  Starts a device controller or a bus controller.
> +
> +  The Start() function is designed to be invoked from the EFI boot service
> ConnectController().
> +  As a result, much of the error checking on the parameters to Start() has
> been moved into this
> +  common boot service. It is legal to call Start() from other locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE.
> +  2. If RemainingDevicePath is not NULL, then it must be a pointer to a
> naturally aligned
> +     EFI_DEVICE_PATH_PROTOCOL.
> +  3. Prior to calling Start(), the Supported() function for the driver specified
> by This must
> +     have been called with the same calling parameters, and Supported()
> must have returned EFI_SUCCESS.
> +
> +  @param[in]  This                 A pointer to the
> EFI_DRIVER_BINDING_PROTOCOL instance.
> +  @param[in]  ControllerHandle     The handle of the controller to start. This
> handle
> +                                   must support a protocol interface that supplies
> +                                   an I/O abstraction to the driver.
> +  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a
> device path.  This
> +                                   parameter is ignored by device drivers, and is optional for
> bus
> +                                   drivers. For a bus driver, if this parameter is NULL, then
> handles
> +                                   for all the children of Controller are created by this driver.
> +                                   If this parameter is not NULL and the first Device Path
> Node is
> +                                   not the End of Device Path Node, then only the handle for
> the
> +                                   child device specified by the first Device Path Node of
> +                                   RemainingDevicePath is created by this driver.
> +                                   If the first Device Path Node of RemainingDevicePath is
> +                                   the End of Device Path Node, no child handle is created by
> this
> +                                   driver.
> +
> +  @retval EFI_SUCCESS              The driver is started.
> +  @retval EFI_ALREADY_STARTED      The driver was already started.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStart (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> +  )
> +{
> +  VOID *ConfigHandlerRegistration;
> +
> +  if (gRedfishConfigData.Event != NULL) {
> +    return EFI_ALREADY_STARTED;
> +  }
> +
> +  gRedfishConfigData.Event = EfiCreateProtocolNotifyEvent (
> +                                &gEdkIIRedfishConfigHandlerProtocolGuid,
> +                                TPL_CALLBACK,
> +                                RedfishConfigHandlerInstalledCallback,
> +                                (VOID *)&gRedfishConfigData,
> +                                &ConfigHandlerRegistration
> +                                );
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  Stops a device controller or a bus controller.
> +
> +  The Stop() function is designed to be invoked from the EFI boot service
> DisconnectController().
> +  As a result, much of the error checking on the parameters to Stop() has
> been moved
> +  into this common boot service. It is legal to call Stop() from other locations,
> +  but the following calling restrictions must be followed, or the system
> behavior will not be deterministic.
> +  1. ControllerHandle must be a valid EFI_HANDLE that was used on a
> previous call to this
> +     same driver's Start() function.
> +  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a
> valid
> +     EFI_HANDLE. In addition, all of these handles must have been created in
> this driver's
> +     Start() function, and the Start() function must have called OpenProtocol()
> on
> +     ControllerHandle with an Attribute of
> EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
> +
> +  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL
> instance.
> +  @param[in]  ControllerHandle  A handle to the device being stopped. The
> handle must
> +                                support a bus specific I/O protocol for the driver
> +                                to use to stop the device.
> +  @param[in]  NumberOfChildren  The number of child device handles in
> ChildHandleBuffer.
> +  @param[in]  ChildHandleBuffer An array of child handles to be freed. May
> be NULL
> +                                if NumberOfChildren is 0.
> +
> +  @retval EFI_SUCCESS           The device was stopped.
> +  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a
> device error.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigDriverBindingStop (
> +  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> +  IN EFI_HANDLE                   ControllerHandle,
> +  IN UINTN                        NumberOfChildren,
> +  IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL
> +  )
> +{
> +  EFI_STATUS  Status;
> +
> +  if (ControllerHandle == gEfiRedfishDiscoverControllerHandle) {
> +    RedfishConfigStopRedfishDiscovery ();
> +  }
> +  gBS->CloseProtocol (
> +         ControllerHandle,
> +         &gEfiRedfishDiscoverProtocolGuid,
> +         gRedfishConfigData.Image,
> +         gRedfishConfigData.Image
> +         );
> +
> +  Status = RedfishConfigCommonStop ();
> +  if (EFI_ERROR (Status)) {
> +    return EFI_DEVICE_ERROR;
> +  }
> +
> +  if (gRedfishConfigData.Event != NULL) {
> +    gBS->CloseEvent (gRedfishConfigData.Event);
> +    gRedfishConfigData.Event = NULL;
> +  }
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  Callback function when Redfish service is discovered.
> +
> +  @param[in]   Event    Event whose notification function is being invoked.
> +  @param[out]  Context  Pointer to the Context buffer
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishServiceDiscoveredCallback (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_REDFISH_DISCOVERED_TOKEN *RedfishDiscoveredToken;
> +  EFI_REDFISH_DISCOVERED_INSTANCE *RedfishInstance;
> +
> +  if (gRedfishServiceDiscovered) {
> +    //
> +    // Only support one Redfish service on platform.
> +    //
> +    return;
> +  }
> +
> +  RedfishDiscoveredToken = (EFI_REDFISH_DISCOVERED_TOKEN *)Context;
> +  RedfishInstance = RedfishDiscoveredToken-
> >DiscoverList.RedfishInstances;
> +  //
> +  // Only pick up the first found Redfish service.
> +  //
> +  if (RedfishInstance->Status == EFI_SUCCESS) {
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceRestExHandle =
> RedfishInstance->Information.RedfishRestExHandle;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceVersion      =
> RedfishInstance->Information.RedfishVersion;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceLocation     =
> RedfishInstance->Information.Location;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUuid         =
> RedfishInstance->Information.Uuid;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOs           =
> RedfishInstance->Information.Os;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceOsVersion    =
> RedfishInstance->Information.OsVersion;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProduct      =
> RedfishInstance->Information.Product;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceProductVer   =
> RedfishInstance->Information.ProductVer;
> +    gRedfishConfigData.RedfishServiceInfo.RedfishServiceUseHttps     =
> RedfishInstance->Information.UseHttps;
> +    gRedfishServiceDiscovered = TRUE;
> +  }
> +
> +  //
> +  // Invoke RedfishConfigHandlerInstalledCallback to execute
> +  // the initialization of Redfish Configure Handler instance.
> +  //
> +  RedfishConfigHandlerInstalledCallback (gRedfishConfigData.Event,
> &gRedfishConfigData);
> +}
> +
> +/**
> +  Callback function executed when the EFI_REDFISH_DISCOVER_PROTOCOL
> +  protocol interface is installed.
> +
> +  @param[in]   Event    Event whose notification function is being invoked.
> +  @param[out]  Context  Pointer to the Context buffer
> +
> +**/
> +VOID
> +EFIAPI
> +RedfishDiscoverProtocolInstalled (
> +  IN  EFI_EVENT  Event,
> +  OUT VOID       *Context
> +  )
> +{
> +  EFI_STATUS Status;
> +  UINTN BufferSize;
> +  EFI_HANDLE HandleBuffer;
> +  UINTN NetworkInterfaceIndex;
> +  EFI_REDFISH_DISCOVER_NETWORK_INTERFACE *ThisNetworkInterface;
> +  EFI_REDFISH_DISCOVERED_TOKEN           *ThisRedfishDiscoveredToken;
> +
> +  DEBUG((DEBUG_INFO, "%a: New network interface is installed on system
> by EFI Redfish discover driver.\n", __FUNCTION__));
> +
> +  BufferSize = sizeof (EFI_HANDLE);
> +  Status = gBS->LocateHandle (
> +                  ByRegisterNotify,
> +                  NULL,
> +                  gEfiRedfishDiscoverRegistration,
> +                  &BufferSize,
> +                  &HandleBuffer
> +                );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG((DEBUG_ERROR, "%a: Can't locate handle with
> EFI_REDFISH_DISCOVER_PROTOCOL installed.\n", __FUNCTION__));
> +  }
> +  gRedfishDiscoverActivated = TRUE;
> +  if (gEfiRedfishDiscoverProtocol == NULL) {
> +     gEfiRedfishDiscoverControllerHandle = HandleBuffer;
> +    //
> +    // First time to open EFI_REDFISH_DISCOVER_PROTOCOL.
> +    //
> +    Status = gBS->OpenProtocol(
> +                      gEfiRedfishDiscoverControllerHandle,
> +                      &gEfiRedfishDiscoverProtocolGuid,
> +                      (VOID **)&gEfiRedfishDiscoverProtocol,
> +                      gRedfishConfigData.Image,
> +                      gRedfishConfigData.Image,
> +                      EFI_OPEN_PROTOCOL_BY_DRIVER
> +                    );
> +    if (EFI_ERROR (Status)) {
> +      gEfiRedfishDiscoverProtocol = NULL;
> +      gRedfishDiscoverActivated = FALSE;
> +      DEBUG((DEBUG_ERROR, "%a: Can't locate
> EFI_REDFISH_DISCOVER_PROTOCOL.\n", __FUNCTION__));
> +      return;
> +    }
> +  }
> +  //
> +  // Check the new found network interface.
> +  //
> +  if (gNetworkInterfaceInstances != NULL) {
> +    FreePool (gNetworkInterfaceInstances);
> +  }
> +  Status = gEfiRedfishDiscoverProtocol->GetNetworkInterfaceList(
> +                                          gEfiRedfishDiscoverProtocol,
> +                                          gRedfishConfigData.Image,
> +                                          &gNumberOfNetworkInterfaces,
> +                                          &gNetworkInterfaceInstances
> +                                          );
> +  if (EFI_ERROR (Status) || gNumberOfNetworkInterfaces == 0) {
> +    DEBUG((DEBUG_ERROR, "%a: No network interfaces found on the
> handle.\n", __FUNCTION__));
> +    return;
> +  }
> +
> +  gRedfishDiscoveredToken = AllocateZeroPool
> (gNumberOfNetworkInterfaces * sizeof
> (EFI_REDFISH_DISCOVERED_TOKEN));
> +  if (gRedfishDiscoveredToken == NULL) {
> +    DEBUG((DEBUG_ERROR, "%a: Not enough memory for
> EFI_REDFISH_DISCOVERED_TOKEN.\n", __FUNCTION__));
> +    return;
> +  }
> +
> +  ThisNetworkInterface = gNetworkInterfaceInstances;
> +  ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
> +  //
> +  // Loop to discover Redfish service on each network interface.
> +  //
> +  for (NetworkInterfaceIndex = 0; NetworkInterfaceIndex <
> gNumberOfNetworkInterfaces; NetworkInterfaceIndex ++) {
> +    //
> +    // Initial this Redfish Discovered Token
> +    //
> +    Status = gBS->CreateEvent (
> +                    EVT_NOTIFY_SIGNAL,
> +                    TPL_CALLBACK,
> +                    RedfishServiceDiscoveredCallback,
> +                    (VOID *)ThisRedfishDiscoveredToken,
> +                    &ThisRedfishDiscoveredToken->Event
> +                  );
> +    if (EFI_ERROR (Status)) {
> +      DEBUG((DEBUG_ERROR, "%a: Failed to create event for Redfish
> discovered token.\n", __FUNCTION__));
> +      goto ErrorReturn;
> +    }
> +    ThisRedfishDiscoveredToken->Signature =
> REDFISH_DISCOVER_TOKEN_SIGNATURE;
> +    ThisRedfishDiscoveredToken->DiscoverList.NumberOfServiceFound = 0;
> +    ThisRedfishDiscoveredToken->DiscoverList.RedfishInstances = NULL;
> +    //
> +    // Acquire for Redfish service which is reported by
> +    // Redfish Host Interface.
> +    //
> +    Status = gEfiRedfishDiscoverProtocol->AcquireRedfishService(
> +                                             gEfiRedfishDiscoverProtocol,
> +                                             gRedfishConfigData.Image,
> +                                             ThisNetworkInterface,
> +                                             EFI_REDFISH_DISCOVER_HOST_INTERFACE,
> +                                             ThisRedfishDiscoveredToken
> +                                             );
> +    ThisNetworkInterface ++;
> +    ThisRedfishDiscoveredToken ++;
> +  }
> +  if (EFI_ERROR (Status)) {
> +    DEBUG((DEBUG_ERROR, "%a: Acquire Redfish service fail.\n",
> __FUNCTION__));
> +    goto ErrorReturn;
> +  }
> +  return;
> +
> +ErrorReturn:
> +  if (gRedfishDiscoveredToken != NULL) {
> +    FreePool(gRedfishDiscoveredToken);
> +  }
> +}
> +
> +/**
> +  Unloads an image.
> +
> +  @param[in]  ImageHandle       Handle that identifies the image to be
> unloaded.
> +
> +  @retval EFI_SUCCESS           The image has been unloaded.
> +
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigHandlerDriverUnload (
> +  IN EFI_HANDLE  ImageHandle
> +  )
> +{
> +  EFI_REDFISH_DISCOVERED_TOKEN *ThisRedfishDiscoveredToken;
> +  UINTN NumberOfNetworkInterfacesIndex;
> +
> +  RedfishConfigDriverCommonUnload (ImageHandle);
> +
> +  RedfishConfigStopRedfishDiscovery ();
> +  if (gRedfishDiscoveredToken != NULL) {
> +    ThisRedfishDiscoveredToken = gRedfishDiscoveredToken;
> +    for (NumberOfNetworkInterfacesIndex = 0;
> NumberOfNetworkInterfacesIndex < gNumberOfNetworkInterfaces;
> NumberOfNetworkInterfacesIndex ++) {
> +      if (ThisRedfishDiscoveredToken->Event != NULL) {
> +        gBS->CloseEvent (ThisRedfishDiscoveredToken->Event);
> +      }
> +      FreePool (ThisRedfishDiscoveredToken);
> +      ThisRedfishDiscoveredToken ++;
> +    }
> +    gRedfishDiscoveredToken = NULL;
> +  }
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  This is the declaration of an EFI image entry point. This entry point is
> +  the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
> +  both device drivers and bus drivers.
> +
> +  @param[in]  ImageHandle       The firmware allocated handle for the UEFI
> image.
> +  @param[in]  SystemTable       A pointer to the EFI System Table.
> +
> +  @retval EFI_SUCCESS           The operation completed successfully.
> +  @retval Others                An unexpected error occurred.
> +**/
> +EFI_STATUS
> +EFIAPI
> +RedfishConfigHandlerDriverEntryPoint (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  )
> +{
> +  EFI_STATUS    Status;
> +
> +  ZeroMem ((VOID *)&gRedfishConfigData, sizeof
> (REDFISH_CONFIG_DRIVER_DATA));
> +  gRedfishConfigData.Image = ImageHandle;
> +  //
> +  // Register event for EFI_REDFISH_DISCOVER_PROTOCOL protocol install
> +  // notification.
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  RedfishDiscoverProtocolInstalled,
> +                  NULL,
> +                  &gEfiRedfishDiscoverProtocolGuid,
> +                  &gEfiRedfishDiscoverProtocolEvent
> +                  );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to create event for the installation of
> EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
> +    return Status;
> +  }
> +  Status = gBS->RegisterProtocolNotify (
> +                  &gEfiRedfishDiscoverProtocolGuid,
> +                  gEfiRedfishDiscoverProtocolEvent,
> +                  &gEfiRedfishDiscoverRegistration
> +                );
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to register event for the installation of
> EFI_REDFISH_DISCOVER_PROTOCOL.", __FUNCTION__));
> +    return Status;
> +  }
> +
> +  Status = RedfishConfigCommonInit (ImageHandle, SystemTable);
> +  if (EFI_ERROR (Status)) {
> +    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> +    gEfiRedfishDiscoverProtocolEvent = NULL;
> +    return Status;
> +  }
> +
> +  //
> +  // Install UEFI Driver Model protocol(s).
> +  //
> +  Status = EfiLibInstallDriverBinding (
> +             ImageHandle,
> +             SystemTable,
> +             &gRedfishConfigDriverBinding,
> +             ImageHandle
> +             );
> +  if (EFI_ERROR (Status)) {
> +    gBS->CloseEvent (gEndOfDxeEvent);
> +    gEndOfDxeEvent = NULL;
> +    gBS->CloseEvent (gExitBootServiceEvent);
> +    gExitBootServiceEvent = NULL;
> +    gBS->CloseEvent (gEfiRedfishDiscoverProtocolEvent);
> +    gEfiRedfishDiscoverProtocolEvent = NULL;
> +    DEBUG ((DEBUG_ERROR, "%a: Fail to install EFI Binding Protocol of EFI
> Redfish Config driver.", __FUNCTION__));
> +    return Status;
> +  }
> +  return Status;
> +}
> +
> --
> 2.17.1
> 
> 
> 
> 
> 



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