[PATCH v2 4/5] NetworkPkg: Define one PCD for PXE to specify MTFTP windowsize.

[Jiaxin Wu <Jiaxin.wu@intel.com>]

*v2: Rename and redefine the PCD in NetworkPkg instead of MdeModulePkg.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=886

This patch is to define one new PCD for PXE driver to specify MTFTP windowsize so as
to improve the PXE download performance. The default value is set to 4.

Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Shao Ming <ming.shao@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
---
 NetworkPkg/NetworkPkg.dec | 6 ++++++
 NetworkPkg/NetworkPkg.uni | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/NetworkPkg/NetworkPkg.dec b/NetworkPkg/NetworkPkg.dec
index aae36226d5..aa721d8315 100644
--- a/NetworkPkg/NetworkPkg.dec
+++ b/NetworkPkg/NetworkPkg.dec
@@ -90,10 +90,16 @@
   # TRUE  - HTTP connections are allowed. Both the "https://" and "http://" URI schemes are permitted.
   # FALSE - HTTP connections are denied. Only the "https://" URI scheme is permitted.
   # @Prompt Indicates whether HTTP connections are permitted or not.
   gEfiNetworkPkgTokenSpaceGuid.PcdAllowHttpConnections|FALSE|BOOLEAN|0x00000008
 
+  ## This setting is to specify the MTFTP windowsize used by UEFI PXE driver. 
+  # A value of 0 indicates the default value of windowsize(1). 
+  # A non-zero value will be used as windowsize.
+  # @Prompt PXE TFTP windowsize.
+  gEfiNetworkPkgTokenSpaceGuid.PcdPxeTftpWindowSize|0x4|UINT64|0x10000008  
+
 [PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
   ## IPv6 DHCP Unique Identifier (DUID) Type configuration (From RFCs 3315 and 6355).
   # 01 = DUID Based on Link-layer Address Plus Time [DUID-LLT]
   # 04 = UUID-Based DHCPv6 Unique Identifier (DUID-UUID)
   # 02 = DUID Assigned by Vendor Based on Enterprise Number [DUID-EN] (not supported)
diff --git a/NetworkPkg/NetworkPkg.uni b/NetworkPkg/NetworkPkg.uni
index 5604b1bf32..07585680e3 100644
--- a/NetworkPkg/NetworkPkg.uni
+++ b/NetworkPkg/NetworkPkg.uni
@@ -53,10 +53,16 @@
 
 #string STR_gEfiNetworkPkgTokenSpaceGuid_PcdAllowHttpConnections_HELP  #language en-US "Indicates whether HTTP connections are permitted or not.\n"
                                                                                        "TRUE  - HTTP connections are allowed.\n"
                                                                                        "FALSE - HTTP connections are denied."
 
+#string STR_gEfiNetworkPkgTokenSpaceGuid_PcdPxeTftpWindowSize_PROMPT  #language en-US "This setting is to specify the MTFTP windowsize used by UEFI PXE driver."
+
+#string STR_gEfiNetworkPkgTokenSpaceGuid_PcdPxeTftpWindowSize_HELP  #language en-US "Specify MTFTP windowsize used by UEFI PXE driver.\n"
+                                                                                    "A value of 0 indicates the default value of windowsize(1).\n"
+                                                                                    "A non-zero value will be used as windowsize."                                                                                       
+
 #string STR_gEfiNetworkPkgTokenSpaceGuid_PcdIpsecCertificateEnabled_PROMPT  #language en-US "Enable IPsec IKEv2 Certificate Authentication."
 
 #string STR_gEfiNetworkPkgTokenSpaceGuid_PcdIpsecCertificateEnabled_HELP  #language en-US "Indicates if the IPsec IKEv2 Certificate Authentication feature is enabled or not.<BR><BR>\n"
                                                                                           "TRUE  - Certificate Authentication feature is enabled.<BR>\n"
                                                                                           "FALSE - Does not support Certificate Authentication.<BR>"
-- 
2.17.1.windows.2