[PATCH] Edk2\NetworkPkg\UefiPxeBcDxe : Open a method to Enabled/Disabled IPV6/IPV6 PXE Support.

["Xue, ShengfengX" <shengfengx.xue@intel.com>]

Please refer this link for defail.  https://bugzilla.tianocore.org/show_bug.cgi?id=1695
Some Platform Developer want IPv4 and IPv6 PXE support separately. So it need open a method Enabled/Disabled IPV6/IPV6 PXE Support in PxeBcSupported().

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Xue, ShengfengX <shengfengx.xue@intel.com>
Reviewed-by: Reviewer Name <devel@edk2.groups.io>
---
 NetworkPkg/NetworkPkg.dec                | 12 +++++++++++-
 NetworkPkg/UefiPxeBcDxe/PxeBcDriver.c    | 12 +++++++++++-
 NetworkPkg/UefiPxeBcDxe/PxeBcImpl.h      |  5 ++++-
 NetworkPkg/UefiPxeBcDxe/UefiPxeBcDxe.inf |  4 +++-
 4 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/NetworkPkg/NetworkPkg.dec b/NetworkPkg/NetworkPkg.dec
index 9b8ece4837..1a7b634631 100644
--- a/NetworkPkg/NetworkPkg.dec
+++ b/NetworkPkg/NetworkPkg.dec
@@ -3,7 +3,7 @@
 #
 # This package provides network modules that conform to UEFI 2.4 specification.
 #
-# Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2009 - 2019, Intel Corporation. All rights reserved.<BR>
 # (C) Copyright 2015-2017 Hewlett Packard Enterprise Development LP<BR>
 #
 # SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -117,5 +117,15 @@
   # @Prompt Type Value of network boot policy used in iSCSI.
   gEfiNetworkPkgTokenSpaceGuid.PcdIScsiAIPNetworkBootPolicy|0x08|UINT8|0x10000007
 
+  ## IPv4 PXE support
+  # 0x00 = PXE Enabled
+  # 0x01 = PXE Disabled
+  gEfiNetworkPkgTokenSpaceGuid.PcdIPv4PXESupport|0x00|UINT8|0x10000008
+
+  ## IPv6 PXE support
+  # 0x00 = PXE Enabled
+  # 0x01 = PXE Disabled
+  gEfiNetworkPkgTokenSpaceGuid.PcdIPv6PXESupport|0x00|UINT8|0x10000009
+
 [UserExtensions.TianoCore."ExtraFiles"]
   NetworkPkgExtra.uni
diff --git a/NetworkPkg/UefiPxeBcDxe/PxeBcDriver.c b/NetworkPkg/UefiPxeBcDxe/PxeBcDriver.c
index 3c1d400d50..cac19242aa 100644
--- a/NetworkPkg/UefiPxeBcDxe/PxeBcDriver.c
+++ b/NetworkPkg/UefiPxeBcDxe/PxeBcDriver.c
@@ -2,7 +2,7 @@
   Driver Binding functions implementationfor for UefiPxeBc Driver.
 
   (C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
-  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2007 - 2019, Intel Corporation. All rights reserved.<BR>
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -1242,6 +1242,10 @@ PxeBcDriverEntryPoint (
 {
   EFI_STATUS  Status;
 
+  if ((PcdGet8(PcdIPv4PXESupport) == PXEDISABLED) && (PcdGet8(PcdIPv6PXESupport) == PXEDISABLED)) {
+    return EFI_UNSUPPORTED;
+  }
+
   Status = EfiLibInstallDriverBindingComponentName2 (
              ImageHandle,
              SystemTable,
@@ -1301,9 +1305,15 @@ PxeBcSupported (
   EFI_GUID                        *MtftpServiceBindingGuid;
 
   if (IpVersion == IP_VERSION_4) {
+    if (PcdGet8(PcdIPv4PXESupport) == PXEDISABLED) {
+      return EFI_UNSUPPORTED;
+    }
     DhcpServiceBindingGuid  = &gEfiDhcp4ServiceBindingProtocolGuid;
     MtftpServiceBindingGuid = &gEfiMtftp4ServiceBindingProtocolGuid;
   } else {
+    if (PcdGet8(PcdIPv6PXESupport) == PXEDISABLED) {
+      return EFI_UNSUPPORTED;
+    }
     DhcpServiceBindingGuid  = &gEfiDhcp6ServiceBindingProtocolGuid;
     MtftpServiceBindingGuid = &gEfiMtftp6ServiceBindingProtocolGuid;
   }
diff --git a/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.h b/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.h
index f0db4a0c1a..ba870ddf5a 100644
--- a/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.h
+++ b/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.h
@@ -2,7 +2,7 @@
   This EFI_PXE_BASE_CODE_PROTOCOL and EFI_LOAD_FILE_PROTOCOL.
   interfaces declaration.
 
-  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2007 - 2019, Intel Corporation. All rights reserved.<BR>
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -78,6 +78,9 @@ typedef struct _PXEBC_VIRTUAL_NIC   PXEBC_VIRTUAL_NIC;
 #define PXEBC_PRIVATE_DATA_FROM_ID(a)         CR (a, PXEBC_PRIVATE_DATA, Id, PXEBC_PRIVATE_DATA_SIGNATURE)
 #define PXEBC_VIRTUAL_NIC_FROM_LOADFILE(a)    CR (a, PXEBC_VIRTUAL_NIC, LoadFile, PXEBC_VIRTUAL_NIC_SIGNATURE)
 
+#define PXEENABLED                            0x00
+#define PXEDISABLED                           0x01
+
 typedef union {
   PXEBC_DHCP4_PACKET_CACHE            Dhcp4;
   PXEBC_DHCP6_PACKET_CACHE            Dhcp6;
diff --git a/NetworkPkg/UefiPxeBcDxe/UefiPxeBcDxe.inf b/NetworkPkg/UefiPxeBcDxe/UefiPxeBcDxe.inf
index fc31250dea..0341f1052a 100644
--- a/NetworkPkg/UefiPxeBcDxe/UefiPxeBcDxe.inf
+++ b/NetworkPkg/UefiPxeBcDxe/UefiPxeBcDxe.inf
@@ -5,7 +5,7 @@
 #  PXE-compatible device for network access or booting. This driver supports
 #  both IPv4 and IPv6 network stack.
 #
-#  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2007 - 2019, Intel Corporation. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -102,6 +102,8 @@
 [Pcd]
   gEfiMdeModulePkgTokenSpaceGuid.PcdTftpBlockSize      ## SOMETIMES_CONSUMES
   gEfiNetworkPkgTokenSpaceGuid.PcdPxeTftpWindowSize    ## SOMETIMES_CONSUMES
+  gEfiNetworkPkgTokenSpaceGuid.PcdIPv4PXESupport       ## CONSUMES
+  gEfiNetworkPkgTokenSpaceGuid.PcdIPv6PXESupport       ## CONSUMES
 
 [UserExtensions.TianoCore."ExtraFiles"]
   UefiPxeBcDxeExtra.uni
-- 
2.16.2.windows.1