For network dynamic media support:

1. add library function NetLibDetectMedia to NetLib for media detection
2. update MnpDxe to periodically poll for media status update and check for media status before packet transmit
3. update Ip4Dxe to return ModeData using Mnp->GetModeData()
4. update IScsiDxe to check for media status before try to do DHCP and session login
5. update UefiPxeBcDxe to check for media status before PXE start

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9919 6f19259b-4bc3-4df7-8a09-765794883524

14 files changed, 184 insertions, 38 deletions

diff --git a/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c b/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c
index a0a53a4e33..f470844ee4 100644
--- a/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c
+++ b/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c
@@ -770,6 +770,7 @@ ON_EXIT:
   @retval EFI_ALREADY_STARTED   Some other EFI DHCPv4 Protocol instance already started the

                                 DHCP process.

   @retval EFI_DEVICE_ERROR      An unexpected system or network error occurred.

+  @retval EFI_NO_MEDIA          There was a media error.

 

 **/

 EFI_STATUS

diff --git a/MdeModulePkg/Universal/Network/IScsiDxe/IScsiDhcp.c b/MdeModulePkg/Universal/Network/IScsiDxe/IScsiDhcp.c
index 996a290610..c770e27631 100644
--- a/MdeModulePkg/Universal/Network/IScsiDxe/IScsiDhcp.c
+++ b/MdeModulePkg/Universal/Network/IScsiDxe/IScsiDhcp.c
@@ -1,7 +1,7 @@
 /** @file

   iSCSI DHCP related configuration routines.

 

-Copyright (c) 2004 - 2009, Intel Corporation.<BR>

+Copyright (c) 2004 - 2010, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions of the BSD License

 which accompanies this distribution.  The full text of the license may be found at

@@ -344,7 +344,9 @@ IScsiParseDhcpAck (
 

   @retval EFI_SUCCESS           The DNS information is got from the DHCP ACK.

   @retval EFI_OUT_OF_RESOURCES  Failed to allocate memory.

+  @retval EFI_NO_MEDIA          There was a media error.

   @retval Others                Other errors as indicated.

+

 **/

 EFI_STATUS

 IScsiDoDhcp (

@@ -358,12 +360,22 @@ IScsiDoDhcp (
   EFI_STATUS              Status;

   EFI_DHCP4_PACKET_OPTION *ParaList;

   EFI_DHCP4_CONFIG_DATA   Dhcp4ConfigData;

+  BOOLEAN                 MediaPresent;

 

   Dhcp4Handle = NULL;

   Dhcp4       = NULL;

   ParaList    = NULL;

 

   //

+  // Check media status before do DHCP

+  //

+  MediaPresent = TRUE;

+  NetLibDetectMedia (Controller, &MediaPresent);

+  if (!MediaPresent) {

+    return EFI_NO_MEDIA;

+  }

+

+  //

   // Create a DHCP4 child instance and get the protocol.

   //

   Status = NetLibCreateServiceChild (

diff --git a/MdeModulePkg/Universal/Network/IScsiDxe/IScsiDhcp.h b/MdeModulePkg/Universal/Network/IScsiDxe/IScsiDhcp.h
index 07b30a936c..eefc5b37a8 100644
--- a/MdeModulePkg/Universal/Network/IScsiDxe/IScsiDhcp.h
+++ b/MdeModulePkg/Universal/Network/IScsiDxe/IScsiDhcp.h
@@ -1,7 +1,7 @@
 /** @file

   The header file of IScsiDhcp.

 

-Copyright (c) 2004 - 2009, Intel Corporation.<BR>

+Copyright (c) 2004 - 2010, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions of the BSD License

 which accompanies this distribution.  The full text of the license may be found at

@@ -47,7 +47,9 @@ typedef struct _ISCSI_ROOT_PATH_FIELD {
 

   @retval EFI_SUCCESS           The DNS information is got from the DHCP ACK.

   @retval EFI_OUT_OF_RESOURCES  Failed to allocate memory.

+  @retval EFI_NO_MEDIA          There was a media error.

   @retval Others                Other errors as indicated.

+

 **/

 EFI_STATUS

 IScsiDoDhcp (

diff --git a/MdeModulePkg/Universal/Network/IScsiDxe/IScsiProto.c b/MdeModulePkg/Universal/Network/IScsiDxe/IScsiProto.c
index ac0d8d821f..2261bc17f0 100644
--- a/MdeModulePkg/Universal/Network/IScsiDxe/IScsiProto.c
+++ b/MdeModulePkg/Universal/Network/IScsiDxe/IScsiProto.c
@@ -1,7 +1,7 @@
 /** @file

   The implementation of iSCSI protocol based on RFC3720.

 

-Copyright (c) 2004 - 2009, Intel Corporation.<BR>

+Copyright (c) 2004 - 2010, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions of the BSD License

 which accompanies this distribution.  The full text of the license may be found at

@@ -276,7 +276,9 @@ IScsiDestroyConnection (
 

   @retval EFI_SUCCESS          The iSCSI session login procedure finished.

   @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.

+  @retval EFI_NO_MEDIA         There was a media error.

   @retval Others               Other errors as indicated.

+

 **/

 EFI_STATUS

 IScsiSessionLogin (

@@ -287,10 +289,20 @@ IScsiSessionLogin (
   ISCSI_SESSION     *Session;

   ISCSI_CONNECTION  *Conn;

   EFI_TCP4_PROTOCOL *Tcp4;

+  BOOLEAN           MediaPresent;

 

   Session = &Private->Session;

 

   //

+  // Check media status before session login

+  //

+  MediaPresent = TRUE;

+  NetLibDetectMedia (Private->Controller, &MediaPresent);

+  if (!MediaPresent) {

+    return EFI_NO_MEDIA;

+  }

+

+  //

   // Create a connection for the session.

   //

   Conn = IScsiCreateConnection (Private, Session);

diff --git a/MdeModulePkg/Universal/Network/IScsiDxe/IScsiProto.h b/MdeModulePkg/Universal/Network/IScsiDxe/IScsiProto.h
index 93fe2af5b7..e11565e301 100644
--- a/MdeModulePkg/Universal/Network/IScsiDxe/IScsiProto.h
+++ b/MdeModulePkg/Universal/Network/IScsiDxe/IScsiProto.h
@@ -1,7 +1,7 @@
 /** @file

   The header file of iSCSI Protocol that defines many specific data structures.

 

-Copyright (c) 2004 - 2009, Intel Corporation.<BR>

+Copyright (c) 2004 - 2010, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions of the BSD License

 which accompanies this distribution.  The full text of the license may be found at

@@ -692,7 +692,9 @@ IScsiDestroyConnection (
 

   @retval EFI_SUCCESS          The iSCSI session login procedure finished.

   @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.

+  @retval EFI_NO_MEDIA         There was a media error.

   @retval Others               Other errors as indicated.

+

 **/

 EFI_STATUS

 IScsiSessionLogin (

diff --git a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c
index ec545a6c54..06358f06ef 100644
--- a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c
+++ b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c
@@ -440,16 +440,13 @@ EfiIp4GetModeData (
     }

   }

 

-  if (MnpConfigData != NULL) {

-    CopyMem (MnpConfigData, &IpSb->MnpConfigData, sizeof (*MnpConfigData));

-  }

-

-  if (SnpModeData != NULL) {

-    CopyMem (SnpModeData, &IpSb->SnpMode, sizeof (*SnpModeData));

-  }

+  //

+  // Get fresh mode data from MNP, since underlying media status may change

+  //

+  Status = IpSb->Mnp->GetModeData (IpSb->Mnp, MnpConfigData, SnpModeData);

 

   gBS->RestoreTPL (OldTpl);

-  return EFI_SUCCESS;

+  return Status;

 }

 

 

diff --git a/MdeModulePkg/Universal/Network/MnpDxe/MnpConfig.c b/MdeModulePkg/Universal/Network/MnpDxe/MnpConfig.c
index af642a50d9..115185afe2 100644
--- a/MdeModulePkg/Universal/Network/MnpDxe/MnpConfig.c
+++ b/MdeModulePkg/Universal/Network/MnpDxe/MnpConfig.c
@@ -1,7 +1,7 @@
 /** @file

   Implementation of Managed Network Protocol private services.

 

-Copyright (c) 2005 - 2009, Intel Corporation.<BR>

+Copyright (c) 2005 - 2010, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions

 of the BSD License which accompanies this distribution.  The full

@@ -356,6 +356,22 @@ MnpInitializeDeviceData (
   }

 

   //

+  // Create the timer for media detection.

+  //

+  Status = gBS->CreateEvent (

+                  EVT_NOTIFY_SIGNAL | EVT_TIMER,

+                  TPL_CALLBACK,

+                  MnpCheckMediaStatus,

+                  MnpDeviceData,

+                  &MnpDeviceData->MediaDetectTimer

+                  );

+  if (EFI_ERROR (Status)) {

+    DEBUG ((EFI_D_ERROR, "MnpInitializeDeviceData: CreateEvent for media detection failed.\n"));

+

+    goto ERROR;

+  }

+

+  //

   // Create the timer for tx timeout check.

   //

   Status = gBS->CreateEvent (

@@ -382,6 +398,10 @@ ERROR:
       gBS->CloseEvent (MnpDeviceData->TimeoutCheckTimer);

     }

 

+    if (MnpDeviceData->MediaDetectTimer != NULL) {

+      gBS->CloseEvent (MnpDeviceData->MediaDetectTimer);

+    }

+

     if (MnpDeviceData->PollTimer != NULL) {

       gBS->CloseEvent (MnpDeviceData->PollTimer);

     }

@@ -443,9 +463,10 @@ MnpDestroyDeviceData (
   //

   // Close the event.

   //

-  gBS->CloseEvent (&MnpDeviceData->TxTimeoutEvent);

-  gBS->CloseEvent (&MnpDeviceData->TimeoutCheckTimer);

-  gBS->CloseEvent (&MnpDeviceData->PollTimer);

+  gBS->CloseEvent (MnpDeviceData->TxTimeoutEvent);

+  gBS->CloseEvent (MnpDeviceData->TimeoutCheckTimer);

+  gBS->CloseEvent (MnpDeviceData->MediaDetectTimer);

+  gBS->CloseEvent (MnpDeviceData->PollTimer);

 

   //

   // Free the tx buffer.

@@ -1010,6 +1031,24 @@ MnpStart (
 

         goto ErrorExit;

       }

+

+      //

+      // Start the media detection timer.

+      //

+      Status = gBS->SetTimer (

+                      MnpDeviceData->MediaDetectTimer,

+                      TimerPeriodic,

+                      MNP_MEDIA_DETECT_INTERVAL

+                      );

+      if (EFI_ERROR (Status)) {

+        DEBUG (

+          (EFI_D_ERROR,

+          "MnpStart, gBS->SetTimer for MediaDetectTimer %r.\n",

+          Status)

+          );

+

+        goto ErrorExit;

+      }

     }

   }

 

@@ -1096,6 +1135,11 @@ MnpStop (
   Status = gBS->SetTimer (MnpDeviceData->TimeoutCheckTimer, TimerCancel, 0);

 

   //

+  // Cancel the media detect timer.

+  //

+  Status = gBS->SetTimer (MnpDeviceData->MediaDetectTimer, TimerCancel, 0);

+

+  //

   // Stop the simple network.

   //

   Status = MnpStopSnp (MnpDeviceData->Snp);

diff --git a/MdeModulePkg/Universal/Network/MnpDxe/MnpDriver.c b/MdeModulePkg/Universal/Network/MnpDxe/MnpDriver.c
index e3abd48cf3..d2d5924c77 100644
--- a/MdeModulePkg/Universal/Network/MnpDxe/MnpDriver.c
+++ b/MdeModulePkg/Universal/Network/MnpDxe/MnpDriver.c
@@ -1,7 +1,7 @@
 /** @file

   Implementation of driver entry point and driver binding protocol.

 

-Copyright (c) 2005 - 2009, Intel Corporation.<BR>

+Copyright (c) 2005 - 2010, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions

 of the BSD License which accompanies this distribution.  The full

@@ -336,7 +336,7 @@ MnpDriverBindingStop (
     }

 

     //

-    // Destroy the Mnp device data

+    // Destroy Mnp Device Data

     //

     MnpDestroyDeviceData (MnpDeviceData, This->DriverBindingHandle);

     FreePool (MnpDeviceData);

diff --git a/MdeModulePkg/Universal/Network/MnpDxe/MnpDriver.h b/MdeModulePkg/Universal/Network/MnpDxe/MnpDriver.h
index e9698d2aac..d410af2726 100644
--- a/MdeModulePkg/Universal/Network/MnpDxe/MnpDriver.h
+++ b/MdeModulePkg/Universal/Network/MnpDxe/MnpDriver.h
@@ -1,7 +1,7 @@
 /** @file

   Declaration of strctures and functions for MnpDxe driver.

 

-Copyright (c) 2005 - 2009, Intel Corporation.<BR>

+Copyright (c) 2005 - 2010, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions

 of the BSD License which accompanies this distribution.  The full

@@ -70,6 +70,7 @@ typedef struct {
   BOOLEAN                       EnableSystemPoll;

 

   EFI_EVENT                     TimeoutCheckTimer;

+  EFI_EVENT                     MediaDetectTimer;

 

   UINT32                        UnicastCount;

   UINT32                        BroadcastCount;

diff --git a/MdeModulePkg/Universal/Network/MnpDxe/MnpImpl.h b/MdeModulePkg/Universal/Network/MnpDxe/MnpImpl.h
index d35086221e..54a61c3961 100644
--- a/MdeModulePkg/Universal/Network/MnpDxe/MnpImpl.h
+++ b/MdeModulePkg/Universal/Network/MnpDxe/MnpImpl.h
@@ -1,7 +1,7 @@
 /** @file

   Declaration of structures and functions of MnpDxe driver.

 

-Copyright (c) 2005 - 2009, Intel Corporation.<BR>

+Copyright (c) 2005 - 2010, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions

 of the BSD License which accompanies this distribution.  The full

@@ -22,6 +22,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 

 #define MNP_SYS_POLL_INTERVAL         (10 * TICKS_PER_MS)   // 10 milliseconds

 #define MNP_TIMEOUT_CHECK_INTERVAL    (50 * TICKS_PER_MS)   // 50 milliseconds

+#define MNP_MEDIA_DETECT_INTERVAL     (500 * TICKS_PER_MS)  // 500 milliseconds

 #define MNP_TX_TIMEOUT_TIME           (500 * TICKS_PER_MS)  // 500 milliseconds

 #define MNP_INIT_NET_BUFFER_NUM       512

 #define MNP_NET_BUFFER_INCREASEMENT   64

@@ -448,9 +449,8 @@ MnpFreeNbuf (
 /**

   Remove the received packets if timeout occurs.

 

-  @param[in]  Event             The event this notify function registered to.

-  @param[in]  Context           Pointer to the context data registered to the

-                                event.

+  @param[in]  Event        The event this notify function registered to.

+  @param[in]  Context      Pointer to the context data registered to the event.

 

 **/

 VOID

@@ -461,18 +461,32 @@ MnpCheckPacketTimeout (
   );

 

 /**

+  Poll to update MediaPresent field in SNP ModeData by Snp.GetStatus().

+

+  @param[in]  Event        The event this notify function registered to.

+  @param[in]  Context      Pointer to the context data registered to the event.

+

+**/

+VOID

+EFIAPI

+MnpCheckMediaStatus (

+  IN EFI_EVENT     Event,

+  IN VOID          *Context

+  );

+

+/**

   Poll to receive the packets from Snp. This function is either called by upperlayer

   protocols/applications or the system poll timer notify mechanism.

 

-  @param[in]       Event        The event this notify function registered to.

-  @param[in, out]  Context      Pointer to the context data registered to the event.

+  @param[in]  Event        The event this notify function registered to.

+  @param[in]  Context      Pointer to the context data registered to the event.

 

 **/

 VOID

 EFIAPI

 MnpSystemPoll (

-  IN     EFI_EVENT   Event,

-  IN OUT VOID        *Context

+  IN EFI_EVENT     Event,

+  IN VOID          *Context

   );

 

 /**

diff --git a/MdeModulePkg/Universal/Network/MnpDxe/MnpIo.c b/MdeModulePkg/Universal/Network/MnpDxe/MnpIo.c
index 65268a8d74..32cffd5730 100644
--- a/MdeModulePkg/Universal/Network/MnpDxe/MnpIo.c
+++ b/MdeModulePkg/Universal/Network/MnpDxe/MnpIo.c
@@ -1,7 +1,7 @@
 /** @file

   Implementation of Managed Network Protocol I/O functions.

 

-Copyright (c) 2005 - 2009, Intel Corporation.<BR>

+Copyright (c) 2005 - 2010, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions

 of the BSD License which accompanies this distribution.  The full

@@ -211,6 +211,18 @@ MnpSyncSendPacket (
   HeaderSize    = Snp->Mode->MediaHeaderSize - TxData->HeaderLength;

 

   //

+  // Check media status before transmit packet.

+  // Note: media status will be updated by periodic timer MediaDetectTimer.

+  //

+  if (!Snp->Mode->MediaPresent) {

+    //

+    // Media not present, skip packet transmit and report EFI_NO_MEDIA

+    //

+    Status = EFI_NO_MEDIA;

+    goto SIGNAL_TOKEN;

+  }

+

+  //

   // Start the timeout event.

   //

   Status = gBS->SetTimer (

@@ -998,9 +1010,8 @@ EXIT:
 /**

   Remove the received packets if timeout occurs.

 

-  @param[in]  Event             The event this notify function registered to.

-  @param[in]  Context           Pointer to the context data registered to the

-                                event.

+  @param[in]  Event        The event this notify function registered to.

+  @param[in]  Context      Pointer to the context data registered to the event.

 

 **/

 VOID

@@ -1066,18 +1077,49 @@ MnpCheckPacketTimeout (
 }

 

 /**

+  Poll to update MediaPresent field in SNP ModeData by Snp->GetStatus().

+

+  @param[in]  Event        The event this notify function registered to.

+  @param[in]  Context      Pointer to the context data registered to the event.

+

+**/

+VOID

+EFIAPI

+MnpCheckMediaStatus (

+  IN EFI_EVENT     Event,

+  IN VOID          *Context

+  )

+{

+  MNP_DEVICE_DATA             *MnpDeviceData;

+  EFI_SIMPLE_NETWORK_PROTOCOL *Snp;

+  UINT32                      InterruptStatus;

+

+  MnpDeviceData = (MNP_DEVICE_DATA *) Context;

+  NET_CHECK_SIGNATURE (MnpDeviceData, MNP_DEVICE_DATA_SIGNATURE);

+

+  Snp = MnpDeviceData->Snp;

+  if (Snp->Mode->MediaPresentSupported) {

+    //

+    // Upon successful return of GetStatus(), the MediaPresent field of

+    // EFI_SIMPLE_NETWORK_MODE will be updated to reflect any change of media status

+    //

+    Snp->GetStatus (Snp, &InterruptStatus, NULL);

+  }

+}

+

+/**

   Poll to receive the packets from Snp. This function is either called by upperlayer

   protocols/applications or the system poll timer notify mechanism.

 

-  @param[in]       Event        The event this notify function registered to.

-  @param[in, out]  Context      Pointer to the context data registered to the event.

+  @param[in]  Event        The event this notify function registered to.

+  @param[in]  Context      Pointer to the context data registered to the event.

 

 **/

 VOID

 EFIAPI

 MnpSystemPoll (

-  IN     EFI_EVENT   Event,

-  IN OUT VOID        *Context

+  IN EFI_EVENT     Event,

+  IN VOID          *Context

   )

 {

   MNP_DEVICE_DATA  *MnpDeviceData;

diff --git a/MdeModulePkg/Universal/Network/MnpDxe/MnpMain.c b/MdeModulePkg/Universal/Network/MnpDxe/MnpMain.c
index e34936f3b8..1f7b1e6bf0 100644
--- a/MdeModulePkg/Universal/Network/MnpDxe/MnpMain.c
+++ b/MdeModulePkg/Universal/Network/MnpDxe/MnpMain.c
@@ -1,7 +1,7 @@
 /** @file

   Implementation of Managed Network Protocol public services.

 

-Copyright (c) 2005 - 2009, Intel Corporation.<BR>

+Copyright (c) 2005 - 2010, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions

 of the BSD License which accompanies this distribution.  The full

@@ -52,6 +52,7 @@ MnpGetModeData (
   EFI_SIMPLE_NETWORK_PROTOCOL *Snp;

   EFI_TPL                     OldTpl;

   EFI_STATUS                  Status;

+  UINT32                      InterruptStatus;

 

   if (This == NULL) {

     return EFI_INVALID_PARAMETER;

@@ -73,6 +74,12 @@ MnpGetModeData (
     // Copy the underlayer Snp mode data.

     //

     Snp = Instance->MnpServiceData->MnpDeviceData->Snp;

+

+    //

+    // Upon successful return of GetStatus(), the Snp->Mode->MediaPresent

+    // will be updated to reflect any change of media status

+    //

+    Snp->GetStatus (Snp, &InterruptStatus, NULL);

     CopyMem (SnpModeData, Snp->Mode, sizeof (*SnpModeData));

   }

 

diff --git a/MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Impl.c b/MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Impl.c
index 3d92ba3dd1..8652ba5256 100644
--- a/MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Impl.c
+++ b/MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Impl.c
@@ -1,7 +1,7 @@
 /** @file

   Interface routine for Mtftp4.

   

-Copyright (c) 2006 - 2009, Intel Corporation<BR>

+Copyright (c) 2006 - 2010, Intel Corporation<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions of the BSD License

 which accompanies this distribution.  The full text of the license may be found at

@@ -776,6 +776,7 @@ EfiMtftp4ParseOptions (
   @retval EFI_TIMEOUT           No responses were received from the MTFTPv4 server.

   @retval EFI_TFTP_ERROR        An MTFTPv4 ERROR packet was received.

   @retval EFI_DEVICE_ERROR      An unexpected network error or system error occurred.

+  @retval EFI_NO_MEDIA          There was a media error.

 

 **/

 EFI_STATUS

@@ -971,7 +972,8 @@ EfiMtftp4ReadDirectory (
                                  in the Buffer.

   @retval EFI_TIMEOUT            No responses were received from the MTFTPv4 server.

   @retval EFI_DEVICE_ERROR       An unexpected network error or system error occurred.

-  

+  @retval EFI_NO_MEDIA           There was a media error.

+

 **/

 EFI_STATUS

 EFIAPI

diff --git a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c
index df9d2df5be..f0fc48f8ac 100644
--- a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c
+++ b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c
@@ -2585,6 +2585,7 @@ EfiPxeLoadFile (
   BOOLEAN                     NewMakeCallback;

   EFI_STATUS                  Status;

   UINT64                      TmpBufSize;

+  BOOLEAN                     MediaPresent;

 

   Private         = PXEBC_PRIVATE_DATA_FROM_LOADFILE (This);

   PxeBc           = &Private->PxeBc;

@@ -2603,6 +2604,15 @@ EfiPxeLoadFile (
     return EFI_UNSUPPORTED;

   }

 

+  //

+  // Check media status before PXE start

+  //

+  MediaPresent = TRUE;

+  NetLibDetectMedia (Private->Controller, &MediaPresent);

+  if (!MediaPresent) {

+    return EFI_NO_MEDIA;

+  }

+

   Status = PxeBc->Start (PxeBc, FALSE);

   if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {

     return Status;