From 2846c19da98ce1dca410e39e5b30e06a1166220d Mon Sep 17 00:00:00 2001
From: Abner Chang <abner.chang@amd.com>
Date: Mon, 19 Dec 2022 21:18:00 +0800
Subject: RedfishPkg/RedfishHostInterface: Platform Redfish HI notification

For some use cases, Redfish host interface table relies on
the certain EFI protocols installation at the driver connection.
Redfish host interface DXE driver is not able to build the
SMBIOS type 42h record at driver entry point. This patch adds
the mechanism in Redfish host interface DXE driver to listen
to EFI protocol installed by platform library that indicates
the necessary information is ready for building SMBIOS 42h
record.

Signed-off-by: Abner Chang <abner.chang@amd.com>
Cc: Nickle Wang <nicklew@nvidia.com>
Cc: Igor Kulchytskyy <igork@ami.com>
Reviewed-by: Nickle Wang <nicklew@nvidia.com>
---
 .../RedfishHostInterfaceDxe.c                      | 73 +++++++++++++++++++++-
 1 file changed, 71 insertions(+), 2 deletions(-)

(limited to 'RedfishPkg/RedfishHostInterfaceDxe')

diff --git a/RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.c b/RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.c
index 623350bc26..3e12e0c8b9 100644
--- a/RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.c
+++ b/RedfishPkg/RedfishHostInterfaceDxe/RedfishHostInterfaceDxe.c
@@ -6,6 +6,7 @@
 
   Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
   (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+  Copyright (C) 2022 Advanced Micro Devices, Inc. All rights reserved.<BR>
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -21,6 +22,9 @@
 #include <Library/UefiBootServicesTableLib.h>
 #include <Library/UefiRuntimeServicesTableLib.h>
 
+static EFI_EVENT  mPlatformHostInterfaceReadylEvent        = NULL;
+static VOID       *mPlatformHostInterfaceReadyRegistration = NULL;
+
 /**
   Create SMBIOS type 42 record for Redfish host interface.
 
@@ -238,6 +242,27 @@ ON_EXIT:
   return Status;
 }
 
+/**
+  Notification event of platform Redfish Host Interface readiness.
+
+  @param[in]  Event     Event whose notification function is being invoked.
+  @param[in]  Context   The pointer to the notification function's context,
+                        which is implementation-dependent.
+
+**/
+VOID
+EFIAPI
+PlatformHostInterfaceInformationReady (
+  IN  EFI_EVENT  Event,
+  IN  VOID       *Context
+  )
+{
+  DEBUG ((DEBUG_INFO, "%a: Platform Redfish Host Interface informtion is ready\n", __FUNCTION__));
+
+  RedfishCreateSmbiosTable42 ();
+  return;
+}
+
 /**
   Main entry for this driver.
 
@@ -254,8 +279,52 @@ RedfishHostInterfaceDxeEntryPoint (
   IN EFI_SYSTEM_TABLE  *SystemTable
   )
 {
+  EFI_STATUS  Status;
+  EFI_GUID    *ReadyGuid;
+
+  DEBUG ((DEBUG_INFO, "%a: Entry\n.", __FUNCTION__));
+
   //
-  // Create SMBIOS type 42 record.
+  // Check if the Redfish Host Interface depends on
+  // the specific protocol installation.
   //
-  return RedfishCreateSmbiosTable42 ();
+  Status = RedfishPlatformHostInterfaceNotification (&ReadyGuid);
+  if (Status == EFI_SUCCESS) {
+    DEBUG ((DEBUG_INFO, "    Create protocol install notification to know the installation of platform Redfish host interface readiness\n"));
+    DEBUG ((DEBUG_INFO, "    Protocol GUID: %g\n", ReadyGuid));
+    //
+    // Register event for ReadyGuid protocol installed by
+    // platform Redfish host interface library.
+    //
+    Status = gBS->CreateEvent (
+                    EVT_NOTIFY_SIGNAL,
+                    TPL_CALLBACK,
+                    PlatformHostInterfaceInformationReady,
+                    NULL,
+                    &mPlatformHostInterfaceReadylEvent
+                    );
+    if (EFI_ERROR (Status)) {
+      DEBUG ((DEBUG_ERROR, "    Fail to create event for the installation of platform Redfish host interface readiness.\n"));
+      return Status;
+    }
+
+    Status = gBS->RegisterProtocolNotify (
+                    ReadyGuid,
+                    mPlatformHostInterfaceReadylEvent,
+                    &mPlatformHostInterfaceReadyRegistration
+                    );
+    if (EFI_ERROR (Status)) {
+      DEBUG ((DEBUG_ERROR, "    Fail to register event for the installation of platform Redfish host interface readiness.\n"));
+      return Status;
+    }
+
+    return EFI_SUCCESS;
+  }
+
+  if ((Status == EFI_UNSUPPORTED) || (Status == EFI_ALREADY_STARTED)) {
+    Status = RedfishCreateSmbiosTable42 ();
+  }
+
+  // Return other erros.
+  return Status;
 }
-- 
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