SourceLevelDebugPkg DebugUsb3: Support IOMMU

For PEI, allocate granted DMA buffer from IOMMU PPI.
For DXE, map DMA buffer by PciIo.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

6 files changed, 842 insertions, 129 deletions

diff --git a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Common.c b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Common.c
index 49bad6b586..87fb026548 100644
--- a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Common.c
+++ b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Common.c
@@ -14,11 +14,6 @@
 

 #include "DebugCommunicationLibUsb3Internal.h"

 

-//

-// The global variable which can be used after memory is ready.

-//

-USB3_DEBUG_PORT_HANDLE     mDebugCommunicationLibUsb3DebugPortHandle;

-

 UINT16   mString0Desc[] = {

   //  String Descriptor Type + Length

   ( USB_DESC_TYPE_STRING << 8 ) + STRING0_DESC_LEN,

@@ -85,7 +80,7 @@ XhcClearR32Bit(
   Write the data to the XHCI debug register.

 

   @param  Handle       Debug port handle.

-  @param  Offset       The offset of the runtime register.

+  @param  Offset       The offset of the debug register.

   @param  Data         The data to write.

 

 **/

@@ -129,16 +124,16 @@ XhcReadDebugReg (
 }

 

 /**

-  Set one bit of the runtime register while keeping other bits.

+  Set one bit of the debug register while keeping other bits.

 

   @param  Handle       Debug port handle.

-  @param  Offset       The offset of the runtime register.

+  @param  Offset       The offset of the debug register.

   @param  Bit          The bit mask of the register to set.

 

 **/

 VOID

 XhcSetDebugRegBit (

-  IN USB3_DEBUG_PORT_HANDLE *Handle,

+  IN USB3_DEBUG_PORT_HANDLE   *Handle,

   IN UINT32                   Offset,

   IN UINT32                   Bit

   )

@@ -151,6 +146,28 @@ XhcSetDebugRegBit (
 }

 

 /**

+  Clear one bit of the debug register while keeping other bits.

+

+  @param  Handle       Debug port handle.

+  @param  Offset       The offset of the debug register.

+  @param  Bit          The bit mask of the register to clear.

+

+**/

+VOID

+XhcClearDebugRegBit (

+  IN USB3_DEBUG_PORT_HANDLE   *Handle,

+  IN UINT32                   Offset,

+  IN UINT32                   Bit

+  )

+{

+  UINT32                  Data;

+

+  Data  = XhcReadDebugReg (Handle, Offset);

+  Data  &= ~Bit;

+  XhcWriteDebugReg (Handle, Offset, Data);

+}

+

+/**

   Program and eanble XHCI MMIO base address.

 

   @return XHCI MMIO base address.

@@ -199,7 +216,7 @@ UpdateXhcResource (
   IN EFI_PHYSICAL_ADDRESS                   XhciMmioBase

   )

 {

-  if ((Handle == NULL) || (Handle->XhciMmioBase == XhciMmioBase)) {

+  if (Handle == NULL) {

     return;

   }

 

@@ -216,7 +233,7 @@ UpdateXhcResource (
 

   @param  Handle             Debug port handle.

 

-  @retval RETURN_UNSUPPORTED The usb host controller does not supported usb debug port capability.

+  @retval RETURN_UNSUPPORTED The usb host controller does not support usb debug port capability.

   @retval RETURN_SUCCESS     Get bar and offset successfully.

 

 **/

@@ -236,6 +253,14 @@ CalculateUsbDebugPortMmioBase (
   EFI_PHYSICAL_ADDRESS            CapabilityPointer;

   UINT8                           CapLength;

 

+  if (Handle->Initialized != USB3DBG_UNINITIALIZED) {

+    if (Handle->Initialized == USB3DBG_NO_DBG_CAB) {

+      return RETURN_UNSUPPORTED;

+    } else {

+      return RETURN_SUCCESS;

+    }

+  }

+

   VendorId = PciRead16 (PcdGet32(PcdUsbXhciPciAddress) + PCI_VENDOR_ID_OFFSET);

   DeviceId = PciRead16 (PcdGet32(PcdUsbXhciPciAddress) + PCI_DEVICE_ID_OFFSET);

   

@@ -288,6 +313,7 @@ CalculateUsbDebugPortMmioBase (
   Handle->DebugCapabilityBase   = CapabilityPointer;

   Handle->DebugCapabilityOffset = CapabilityPointer - Handle->XhciMmioBase;

   Handle->XhciOpRegister        = Handle->XhciMmioBase + CapLength;

+  Handle->DebugSupport = TRUE;

   Handle->Initialized = USB3DBG_DBG_CAB;

   return RETURN_SUCCESS;

 

@@ -326,6 +352,9 @@ NeedReinitializeHardware(
   Dcctrl = XhcReadDebugReg (Handle, XHC_DC_DCCTRL);

   if ((Dcctrl & BIT0) == 0) {

     Result = TRUE;

+  } else if (!Handle->Ready) {

+    Handle->Ready = TRUE;

+    Handle->Initialized = USB3DBG_ENABLED;

   }

 

   return Result;

@@ -678,6 +707,13 @@ InitializeUsbDebugHardware (
   }

 

   //

+  // Clear DCE bit and LSE bit in DCCTRL

+  //

+  if ((XhcReadDebugReg (Handle, XHC_DC_DCCTRL) & (BIT1|BIT31)) == (BIT1|BIT31)) {

+    XhcClearDebugRegBit (Handle, XHC_DC_DCCTRL, BIT1|BIT31);

+  }

+

+  //

   // Construct the buffer for read, poll and write.

   //

   Handle->UrbIn.Data  = (EFI_PHYSICAL_ADDRESS)(UINTN) Buffer;

@@ -746,6 +782,35 @@ Enable:
 }

 

 /**

+  Discover and initialize usb debug port.

+

+  @param Handle                 Debug port handle.

+

+**/

+VOID

+DiscoverInitializeUsbDebugPort (

+  IN USB3_DEBUG_PORT_HANDLE     *Handle

+  )

+{

+  EFI_STATUS                    Status;

+  EFI_PHYSICAL_ADDRESS          XhciMmioBase;

+

+  //

+  // Read 64-bit MMIO base address

+  //

+  XhciMmioBase = ProgramXhciBaseAddress ();

+  Handle->XhciMmioBase = XhciMmioBase;

+

+  Status = CalculateUsbDebugPortMmioBase (Handle);

+  if (!RETURN_ERROR (Status)) {

+    UpdateXhcResource (Handle, XhciMmioBase);

+    if (NeedReinitializeHardware (Handle)) {

+      InitializeUsbDebugHardware (Handle);

+    }

+  }

+}

+

+/**

   Read data from debug device and save the data in buffer.

 

   Reads NumberOfBytes data bytes from a debug device into the buffer

@@ -772,7 +837,6 @@ DebugPortReadBuffer (
   )

 {

   USB3_DEBUG_PORT_HANDLE    *UsbDebugPortHandle;

-  RETURN_STATUS             Status;

   UINT8                     Index;

   UINT8                     *Data;

 

@@ -780,25 +844,17 @@ DebugPortReadBuffer (
     return 0;

   }

 

-  //

-  // If Handle is NULL, it means memory is ready for use.

-  // Use global variable to store handle value.

-  //

-  if (Handle == NULL) {

-    UsbDebugPortHandle = &mDebugCommunicationLibUsb3DebugPortHandle;

-  } else {

-    UsbDebugPortHandle = (USB3_DEBUG_PORT_HANDLE *)Handle;

+  UsbDebugPortHandle = GetUsb3DebugPortInstance ();

+  if (UsbDebugPortHandle == NULL) {

+    return 0;

   }

-  

-  if (UsbDebugPortHandle->Initialized == USB3DBG_NO_DBG_CAB) {

+

+  if (UsbDebugPortHandle->Initialized != USB3DBG_ENABLED) {

     return 0;

   }

-  

-  if (NeedReinitializeHardware(UsbDebugPortHandle)) {

-    Status = InitializeUsbDebugHardware (UsbDebugPortHandle);

-    if (RETURN_ERROR(Status)) {

-      return 0;

-    }

+

+  if (UsbDebugPortHandle->InNotify) {

+    return 0;

   }

 

   Data = (UINT8 *)(UINTN)UsbDebugPortHandle->Data;

@@ -848,10 +904,8 @@ DebugPortWriteBuffer (
   )

 {

   USB3_DEBUG_PORT_HANDLE    *UsbDebugPortHandle;

-  RETURN_STATUS             Status;

   UINTN                     Sent;

   UINTN                     Total;

-  EFI_PHYSICAL_ADDRESS      XhciMmioBase;

   UINTN                     Index;

 

   if (NumberOfBytes == 0 || Buffer == NULL) {

@@ -861,39 +915,24 @@ DebugPortWriteBuffer (
   Sent  = 0;

   Total = 0;

 

-  //

-  // If Handle is NULL, it means memory is ready for use.

-  // Use global variable to store handle value.

-  //

-  if (Handle == NULL) {

-    UsbDebugPortHandle = &mDebugCommunicationLibUsb3DebugPortHandle;

-  } else {

-    UsbDebugPortHandle = (USB3_DEBUG_PORT_HANDLE *)Handle;

-  }

-  

-  if (UsbDebugPortHandle->Initialized == USB3DBG_NO_DBG_CAB) {

+  UsbDebugPortHandle = GetUsb3DebugPortInstance ();

+  if (UsbDebugPortHandle == NULL) {

     return 0;

   }

 

-  //

-  // MMIO base address is possible to clear, set it if it is cleared. (XhciMemorySpaceClose in PchUsbCommon.c)

-  //

-  XhciMmioBase = ProgramXhciBaseAddress ();

-

-  UpdateXhcResource (UsbDebugPortHandle, XhciMmioBase);

+  if (UsbDebugPortHandle->Initialized != USB3DBG_ENABLED) {

+    return 0;

+  }

 

-  if (NeedReinitializeHardware(UsbDebugPortHandle)) {

-    Status = InitializeUsbDebugHardware (UsbDebugPortHandle);

-    if (RETURN_ERROR(Status)) {

-      return 0;

-    }

+  if (UsbDebugPortHandle->InNotify) {

+    return 0;

   }

 

   //

   // When host is trying to send data, write will be blocked.

   // Poll to see if there is any data sent by host at first.

   //

-  DebugPortPollBuffer (Handle);

+  DebugPortPollBuffer (UsbDebugPortHandle);

 

   Index = 0;

   while ((Total < NumberOfBytes)) {

@@ -902,7 +941,7 @@ DebugPortWriteBuffer (
     } else {

       Sent = (UINT8)(NumberOfBytes - Total);

     }

-    Status = XhcDataTransfer (UsbDebugPortHandle, EfiUsbDataOut, Buffer + Total, &Sent, DATA_TRANSFER_WRITE_TIMEOUT);

+    XhcDataTransfer (UsbDebugPortHandle, EfiUsbDataOut, Buffer + Total, &Sent, DATA_TRANSFER_WRITE_TIMEOUT);

     Total += Sent;

   }

   

@@ -930,33 +969,20 @@ DebugPortPollBuffer (
 {

   USB3_DEBUG_PORT_HANDLE     *UsbDebugPortHandle;

   UINTN                     Length;

-  RETURN_STATUS             Status;

-  EFI_PHYSICAL_ADDRESS      XhciMmioBase;

 

-  //

-  // If Handle is NULL, it means memory is ready for use.

-  // Use global variable to store handle value.

-  //

-  if (Handle == NULL) {

-    UsbDebugPortHandle = &mDebugCommunicationLibUsb3DebugPortHandle;

-  } else {

-    UsbDebugPortHandle = (USB3_DEBUG_PORT_HANDLE *)Handle;

+  UsbDebugPortHandle = GetUsb3DebugPortInstance ();

+  if (UsbDebugPortHandle == NULL) {

+    return FALSE;

   }

 

-  if (UsbDebugPortHandle->Initialized == USB3DBG_NO_DBG_CAB) {

-    return 0;

+  if (UsbDebugPortHandle->Initialized != USB3DBG_ENABLED) {

+    return FALSE;

   }

 

-  XhciMmioBase = ProgramXhciBaseAddress ();

-  UpdateXhcResource (UsbDebugPortHandle, XhciMmioBase);

-  

-  if (NeedReinitializeHardware(UsbDebugPortHandle)) {

-    Status = InitializeUsbDebugHardware(UsbDebugPortHandle);

-    if (RETURN_ERROR(Status)) {

-      return FALSE;

-    }

+  if (UsbDebugPortHandle->InNotify) {

+    return FALSE;

   }

-  

+

   //

   // If the data buffer is not empty, then return TRUE directly.

   // Otherwise initialize a usb read transaction and read data to internal data buffer.

@@ -969,7 +995,7 @@ DebugPortPollBuffer (
   // Read data as much as we can

   //

   Length = XHCI_DEBUG_DEVICE_MAX_PACKET_SIZE;

-  XhcDataTransfer (Handle, EfiUsbDataIn, (VOID *)(UINTN)UsbDebugPortHandle->Data, &Length, DATA_TRANSFER_POLL_TIMEOUT);

+  XhcDataTransfer (UsbDebugPortHandle, EfiUsbDataIn, (VOID *)(UINTN)UsbDebugPortHandle->Data, &Length, DATA_TRANSFER_POLL_TIMEOUT);

 

   if (Length > XHCI_DEBUG_DEVICE_MAX_PACKET_SIZE) {

     return FALSE;

@@ -1017,50 +1043,16 @@ DebugPortInitialize (
   IN DEBUG_PORT_CONTINUE  Function

   )

 {

-  RETURN_STATUS             Status;

-  USB3_DEBUG_PORT_HANDLE    Handle;

   USB3_DEBUG_PORT_HANDLE    *UsbDebugPortHandle;

 

-  //

-  // Validate the PCD PcdDebugPortHandleBufferSize value 

-  //

-  ASSERT (PcdGet16 (PcdDebugPortHandleBufferSize) == sizeof (USB3_DEBUG_PORT_HANDLE));

-

-  if (Function == NULL && Context != NULL) {

-    UsbDebugPortHandle = (USB3_DEBUG_PORT_HANDLE *)Context;

-  } else {

-    ZeroMem(&Handle, sizeof (USB3_DEBUG_PORT_HANDLE));

-    UsbDebugPortHandle = &Handle;

+  UsbDebugPortHandle = GetUsb3DebugPortInstance ();

+  if (UsbDebugPortHandle == NULL) {

+    return NULL;

   }

 

-  if (Function == NULL && Context != NULL) {

-    return (DEBUG_PORT_HANDLE *) Context;

-  }

-  

-  //

-  // Read 64-bit MMIO base address

-  //

-  UsbDebugPortHandle->XhciMmioBase = ProgramXhciBaseAddress ();

-

-  Status = CalculateUsbDebugPortMmioBase (UsbDebugPortHandle);

-  if (RETURN_ERROR (Status)) {

-    goto Exit;

-  }

-

-  if (NeedReinitializeHardware(&Handle)) {

-    Status = InitializeUsbDebugHardware (&Handle);

-    if (RETURN_ERROR(Status)) {

-      goto Exit;

-    }

-  }

-

-Exit:

-

   if (Function != NULL) {

-    Function (Context, &Handle);

-  } else {

-    CopyMem(&mDebugCommunicationLibUsb3DebugPortHandle, &Handle, sizeof (USB3_DEBUG_PORT_HANDLE));

+    Function (Context, UsbDebugPortHandle);

   }

 

-  return (DEBUG_PORT_HANDLE)(UINTN)&mDebugCommunicationLibUsb3DebugPortHandle;

+  return (DEBUG_PORT_HANDLE)(UINTN)UsbDebugPortHandle;

 }

diff --git a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.c b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.c
index c4a8a47682..1582b9a8d6 100644
--- a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.c
+++ b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.c
@@ -1,7 +1,7 @@
 /** @file

   Debug Port Library implementation based on usb3 debug port.

 

-  Copyright (c) 2014 - 2016, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>

   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

@@ -15,8 +15,331 @@
 #include <Base.h>

 #include <PiDxe.h>

 #include <Library/UefiBootServicesTableLib.h>

+#include <Library/HobLib.h>

+#include <Protocol/PciIo.h>

+#include <Protocol/IoMmu.h>

 #include "DebugCommunicationLibUsb3Internal.h"

 

+GUID                        gUsb3DbgGuid =  USB3_DBG_GUID;

+

+USB3_DEBUG_PORT_HANDLE      *mUsb3Instance = NULL;

+

+/**

+  Creates a named event that can be signaled.

+

+  This function creates an event using NotifyTpl, NoifyFunction.

+  If Name is NULL, then ASSERT().

+  If NotifyTpl is not a legal TPL value, then ASSERT().

+  If NotifyFunction is NULL, then ASSERT().

+

+  @param  Name                  Supplies the GUID name of the event.

+  @param  NotifyTpl             Supplies the task priority level of the event notifications.

+  @param  NotifyFunction        Supplies the function to notify when the event is signaled.

+  @param  Event                 A pointer to the event created.

+

+  @retval EFI_SUCCESS           A named event was created.

+  @retval EFI_OUT_OF_RESOURCES  There are not enough resource to create the named event.

+

+**/

+EFI_STATUS

+EFIAPI

+Usb3NamedEventListen (

+  IN CONST EFI_GUID    *Name,

+  IN EFI_TPL           NotifyTpl,

+  IN EFI_EVENT_NOTIFY  NotifyFunction,

+  IN EFI_EVENT         *Event

+  )

+{

+  EFI_STATUS  Status;

+  VOID        *RegistrationLocal;

+

+  ASSERT (Name != NULL);

+  ASSERT (NotifyFunction != NULL);

+  ASSERT (NotifyTpl <= TPL_HIGH_LEVEL);

+

+  //

+  // Create event

+  //

+  Status = gBS->CreateEvent (

+                  EVT_NOTIFY_SIGNAL,

+                  NotifyTpl,

+                  NotifyFunction,

+                  NULL,

+                  Event

+                  );

+  ASSERT_EFI_ERROR (Status);

+

+  //

+  // Register for an installation of protocol interface

+  //

+  Status = gBS->RegisterProtocolNotify (

+                  (EFI_GUID *) Name,

+                  *Event,

+                  &RegistrationLocal

+                  );

+  ASSERT_EFI_ERROR (Status);

+

+  return Status;

+}

+

+/**

+  USB3 map one DMA buffer.

+

+  @param Instance       Pointer to USB3 debug port instance.

+  @param PciIo          Pointer to PciIo for USB3 debug port.

+  @param Address        DMA buffer address to be mapped.

+  @param NumberOfBytes  Number of bytes to be mapped.

+  @param BackupBuffer   Backup buffer address.

+

+**/

+VOID

+Usb3MapOneDmaBuffer (

+  IN USB3_DEBUG_PORT_HANDLE     *Instance,

+  IN EFI_PCI_IO_PROTOCOL        *PciIo,

+  IN EFI_PHYSICAL_ADDRESS       Address,

+  IN UINTN                      NumberOfBytes,

+  IN EFI_PHYSICAL_ADDRESS       BackupBuffer

+  )

+{

+  EFI_STATUS                    Status;

+  VOID                          *HostAddress;

+  EFI_PHYSICAL_ADDRESS          DeviceAddress;

+  VOID                          *Mapping;

+

+  HostAddress = (VOID *) (UINTN) Address;

+  Status = PciIo->Map (

+                    PciIo,

+                    EfiPciIoOperationBusMasterCommonBuffer,

+                    HostAddress,

+                    &NumberOfBytes,

+                    &DeviceAddress,

+                    &Mapping

+                    );

+  ASSERT_EFI_ERROR (Status);

+  ASSERT (DeviceAddress == ((EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress));

+  if (Instance->FromHob) {

+    //

+    // Reallocate the DMA buffer by AllocateAddress with

+    // the memory type accessible by SMM.

+    //

+    CopyMem ((VOID *) (UINTN) BackupBuffer, (VOID *) (UINTN) Address, NumberOfBytes);

+    Status = gBS->FreePages (Address, EFI_SIZE_TO_PAGES (NumberOfBytes));

+    ASSERT_EFI_ERROR (Status);

+    Status = gBS->AllocatePages (

+                    AllocateAddress,

+                    EfiACPIMemoryNVS,

+                    EFI_SIZE_TO_PAGES (NumberOfBytes),

+                    &Address

+                    );

+    ASSERT_EFI_ERROR (Status);

+    CopyMem ((VOID *) (UINTN) Address, (VOID *) (UINTN) BackupBuffer, NumberOfBytes);

+  }

+}

+

+/**

+  USB3 map DMA buffers.

+

+  @param Instance       Pointer to USB3 debug port instance.

+  @param PciIo          Pointer to PciIo for USB3 debug port.

+

+**/

+VOID

+Usb3MapDmaBuffers (

+  IN USB3_DEBUG_PORT_HANDLE     *Instance,

+  IN EFI_PCI_IO_PROTOCOL        *PciIo

+  )

+{

+  EFI_STATUS                    Status;

+  EDKII_IOMMU_PROTOCOL          *IoMmu;

+  EFI_PHYSICAL_ADDRESS          BackupBuffer;

+  UINTN                         BackupBufferSize;

+

+  IoMmu = NULL;

+  Status = gBS->LocateProtocol (&gEdkiiIoMmuProtocolGuid, NULL, (VOID **) &IoMmu);

+  if (EFI_ERROR (Status) || (IoMmu == NULL)) {

+    //

+    // No need to map the DMA buffers.

+    //

+    return;

+  }

+

+  //

+  // Allocate backup buffer for the case that the USB3

+  // debug port instance and DMA buffers are from PEI HOB.

+  // For this case, the DMA buffers need to be reallocated

+  // by AllocateAddress with the memory type accessible by

+  // SMM.

+  //

+  BackupBufferSize = MAX (XHCI_DEBUG_DEVICE_MAX_PACKET_SIZE * 2 + USB3_DEBUG_PORT_WRITE_MAX_PACKET_SIZE,

+                          MAX (sizeof (TRB_TEMPLATE) * TR_RING_TRB_NUMBER,

+                               MAX (sizeof (TRB_TEMPLATE) * EVENT_RING_TRB_NUMBER,

+                                    MAX (sizeof (EVENT_RING_SEG_TABLE_ENTRY) * ERST_NUMBER,

+                                         MAX (sizeof (XHC_DC_CONTEXT),

+                                              STRING0_DESC_LEN + MANU_DESC_LEN + PRODUCT_DESC_LEN + SERIAL_DESC_LEN)))));

+

+  Status = gBS->AllocatePages (

+                  AllocateAnyPages,

+                  EfiBootServicesData,

+                  EFI_SIZE_TO_PAGES (BackupBufferSize),

+                  &BackupBuffer

+                  );

+  ASSERT_EFI_ERROR (Status);

+

+  Usb3MapOneDmaBuffer (

+    Instance,

+    PciIo,

+    Instance->UrbIn.Data,

+    XHCI_DEBUG_DEVICE_MAX_PACKET_SIZE * 2 + USB3_DEBUG_PORT_WRITE_MAX_PACKET_SIZE,

+    BackupBuffer

+    );

+

+  Usb3MapOneDmaBuffer (

+    Instance,

+    PciIo,

+    Instance->TransferRingIn.RingSeg0,

+    sizeof (TRB_TEMPLATE) * TR_RING_TRB_NUMBER,

+    BackupBuffer

+    );

+

+  Usb3MapOneDmaBuffer (

+    Instance,

+    PciIo,

+    Instance->TransferRingOut.RingSeg0,

+    sizeof (TRB_TEMPLATE) * TR_RING_TRB_NUMBER,

+    BackupBuffer

+    );

+

+  Usb3MapOneDmaBuffer (

+    Instance,

+    PciIo,

+    Instance->EventRing.EventRingSeg0,

+    sizeof (TRB_TEMPLATE) * EVENT_RING_TRB_NUMBER,

+    BackupBuffer

+    );

+

+  Usb3MapOneDmaBuffer (

+    Instance,

+    PciIo,

+    Instance->EventRing.ERSTBase,

+    sizeof (EVENT_RING_SEG_TABLE_ENTRY) * ERST_NUMBER,

+    BackupBuffer

+    );

+

+  Usb3MapOneDmaBuffer (

+    Instance,

+    PciIo,

+    Instance->DebugCapabilityContext,

+    sizeof (XHC_DC_CONTEXT),

+    BackupBuffer

+    );

+

+  Usb3MapOneDmaBuffer (

+    Instance,

+    PciIo,

+    ((XHC_DC_CONTEXT *) (UINTN) Instance->DebugCapabilityContext)->DbcInfoContext.String0DescAddress,

+    STRING0_DESC_LEN + MANU_DESC_LEN + PRODUCT_DESC_LEN + SERIAL_DESC_LEN,

+    BackupBuffer

+    );

+

+  gBS->FreePages (BackupBuffer, EFI_SIZE_TO_PAGES (BackupBufferSize));

+}

+

+/**

+  Invoke a notification event

+

+  @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

+Usb3PciIoNotify (

+  IN  EFI_EVENT                Event,

+  IN  VOID                     *Context

+  )

+{

+  EFI_STATUS                    Status;

+  UINTN                         PciIoHandleCount;

+  EFI_HANDLE                    *PciIoHandleBuffer;

+  UINTN                         Index;

+  EFI_PCI_IO_PROTOCOL           *PciIo;

+  UINTN                         PciSegment;

+  UINTN                         PciBusNumber;

+  UINTN                         PciDeviceNumber;

+  UINTN                         PciFunctionNumber;

+  UINT32                        PciAddress;

+

+  ASSERT (mUsb3Instance != NULL);

+

+  Status = gBS->LocateHandleBuffer (

+                  ByProtocol,

+                  &gEfiPciIoProtocolGuid,

+                  NULL,

+                  &PciIoHandleCount,

+                  &PciIoHandleBuffer

+                  );

+  if (!EFI_ERROR (Status) &&

+      (PciIoHandleBuffer != NULL) &&

+      (PciIoHandleCount != 0)) { 

+    for (Index = 0; Index < PciIoHandleCount; Index++) {

+      Status = gBS->HandleProtocol (

+                      PciIoHandleBuffer[Index],

+                      &gEfiPciIoProtocolGuid,

+                      (VOID **) &PciIo

+                      );

+      ASSERT_EFI_ERROR (Status);

+      Status = PciIo->GetLocation (PciIo, &PciSegment, &PciBusNumber, &PciDeviceNumber, &PciFunctionNumber);

+      ASSERT_EFI_ERROR (Status);

+      PciAddress = (UINT32) ((PciBusNumber << 20) | (PciDeviceNumber << 15) | (PciFunctionNumber << 12));

+      if (PciAddress == PcdGet32(PcdUsbXhciPciAddress)) {

+        //

+        // Found the PciIo for USB3 debug port.

+        //

+        DEBUG ((DEBUG_INFO, "%a()\n", __FUNCTION__));

+        mUsb3Instance->InNotify = TRUE;

+        Usb3MapDmaBuffers (mUsb3Instance, PciIo);

+        mUsb3Instance->InNotify = FALSE;

+        gBS->CloseEvent ((EFI_EVENT) (UINTN) mUsb3Instance->PciIoEvent);

+        break;

+      }

+    }

+

+    gBS->FreePool (PciIoHandleBuffer);

+  }

+}

+

+/**

+  Return USB3 debug instance address.

+

+**/  

+USB3_DEBUG_PORT_HANDLE *

+GetUsb3DebugPortInstance (

+  VOID

+  )

+{

+  USB3_DEBUG_PORT_HANDLE          *Instance;

+  EFI_PEI_HOB_POINTERS            Hob;

+

+  Instance = NULL;

+

+  if (mUsb3Instance != NULL) {

+    Instance = mUsb3Instance;

+    goto Done;

+  }

+

+  Hob.Raw = GetFirstGuidHob (&gUsb3DbgGuid);

+  if (Hob.Raw != NULL) {

+    Instance = GET_GUID_HOB_DATA (Hob.Guid);

+  }

+

+Done:

+  if (Instance != NULL) {

+    DiscoverInitializeUsbDebugPort (Instance);

+  }

+  return Instance;

+}

+

 /**

   Allocate aligned memory for XHC's usage.

 

@@ -51,3 +374,113 @@ AllocateAlignBuffer (
 

   return Buf;

 }

+

+/**

+  The constructor function initialize USB3 debug port.

+

+  @param  ImageHandle   The firmware allocated handle for the EFI image.

+  @param  SystemTable   A pointer to the EFI System Table.

+

+  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.

+

+**/

+EFI_STATUS

+EFIAPI

+DebugCommunicationUsb3DxeConstructor (

+  IN EFI_HANDLE        ImageHandle,

+  IN EFI_SYSTEM_TABLE  *SystemTable

+  )

+{

+  USB3_DEBUG_PORT_HANDLE        UsbDbg;

+  USB3_DEBUG_PORT_HANDLE        *Instance;

+  EFI_PHYSICAL_ADDRESS          Address;

+  EFI_STATUS                    Status;

+  EFI_EVENT                     Event;

+

+  Instance = GetUsb3DebugPortInstance ();

+

+  Status = EfiGetSystemConfigurationTable (&gUsb3DbgGuid, (VOID **) &mUsb3Instance);

+  if (!EFI_ERROR (Status)) {

+    goto Done;

+  }

+

+  if (Instance == NULL) {

+    //

+    // Initialize USB debug

+    //

+    ZeroMem (&UsbDbg, sizeof (UsbDbg));

+    UsbDbg.Initialized = USB3DBG_UNINITIALIZED;

+

+    DiscoverInitializeUsbDebugPort (&UsbDbg);

+

+    Instance = &UsbDbg;

+  }

+

+  //

+  // It is first time to run DXE instance, copy Instance from Hob to ACPINvs.

+  //

+  Address = SIZE_4GB;

+  Status = gBS->AllocatePages (

+                  AllocateMaxAddress,

+                  EfiACPIMemoryNVS,

+                  EFI_SIZE_TO_PAGES (sizeof (USB3_DEBUG_PORT_HANDLE)),

+                  &Address

+                  );

+  if (EFI_ERROR (Status)) {

+    return Status;

+  }

+

+  CopyMem (

+    (VOID *)(UINTN)Address,

+    Instance,

+    sizeof (USB3_DEBUG_PORT_HANDLE)

+    );

+  mUsb3Instance = (USB3_DEBUG_PORT_HANDLE *)(UINTN)Address;

+

+  Status = gBS->InstallConfigurationTable (&gUsb3DbgGuid, mUsb3Instance);

+  if (EFI_ERROR (Status)) {

+    return Status;

+  }

+

+Done:

+  if (mUsb3Instance->Ready && (mUsb3Instance->PciIoEvent == 0)) {

+    Status = Usb3NamedEventListen (

+               &gEfiPciIoProtocolGuid,

+               TPL_NOTIFY,

+               Usb3PciIoNotify,

+               &Event

+               );

+    if (!EFI_ERROR (Status)) {

+      mUsb3Instance->PciIoEvent = (EFI_PHYSICAL_ADDRESS) (UINTN) Event;

+    }

+  }

+

+  return EFI_SUCCESS;

+}

+

+/**

+  The destructor function.

+

+  @param  ImageHandle   The firmware allocated handle for the EFI image.

+  @param  SystemTable   A pointer to the EFI System Table.

+

+  @retval EFI_SUCCESS   The destructor always returns EFI_SUCCESS.

+

+**/

+EFI_STATUS

+EFIAPI

+DebugCommunicationUsb3DxeDestructor (

+  IN EFI_HANDLE        ImageHandle,

+  IN EFI_SYSTEM_TABLE  *SystemTable

+  )

+{

+  if ((mUsb3Instance != NULL) && (mUsb3Instance->PciIoEvent != 0)) {

+    //

+    // Close the event created.

+    //

+    gBS->CloseEvent ((EFI_EVENT) (UINTN) mUsb3Instance->PciIoEvent);

+    mUsb3Instance->PciIoEvent = 0;

+  }

+  return EFI_SUCCESS;

+}

+

diff --git a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.inf b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.inf
index 08b9ec12d2..c4e4282c98 100644
--- a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.inf
+++ b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.inf
@@ -1,7 +1,7 @@
 ## @file

 #  Debug Communication Library instance based on usb3 debug port.

 #

-#  Copyright (c) 2014 - 2017, Intel Corporation. All rights reserved.<BR>

+#  Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>

 #

 #  This program and the accompanying materials

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

@@ -21,6 +21,8 @@
   MODULE_TYPE                    = DXE_DRIVER

   VERSION_STRING                 = 1.0

   LIBRARY_CLASS                  = DebugCommunicationLib|DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SAL_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER SMM_CORE

+  CONSTRUCTOR                    = DebugCommunicationUsb3DxeConstructor

+  DESTRUCTOR                     = DebugCommunicationUsb3DxeDestructor

 

 #

 # The following information is for reference only and not required by the build tools.

@@ -54,7 +56,11 @@
 

   # The value of data buffer size used for USB debug port handle.

   # It should be equal to sizeof (USB3_DEBUG_PORT_HANDLE).

-  gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugPortHandleBufferSize|239   ## SOMETIMES_CONSUMES

+  gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugPortHandleBufferSize|250   ## SOMETIMES_CONSUMES

+

+[Protocols]

+  gEfiPciIoProtocolGuid                 ## CONSUMES

+  gEdkiiIoMmuProtocolGuid               ## CONSUMES

 

 [LibraryClasses]

   BaseLib

@@ -65,4 +71,4 @@
   UefiBootServicesTableLib

   UefiLib

   BaseMemoryLib

-  
\ No newline at end of file
+  HobLib

diff --git a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Internal.h b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Internal.h
index 356485c5f6..66757dafae 100644
--- a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Internal.h
+++ b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Internal.h
@@ -1,7 +1,7 @@
 /** @file

   Debug Port Library implementation based on usb3 debug port.

 

-  Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>

   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

@@ -46,6 +46,7 @@
 #define USB3DBG_DBG_CAB       1   // The XHCI host controller supports debug capability

 #define USB3DBG_ENABLED       2   // The XHCI debug device is enabled

 #define USB3DBG_NOT_ENABLED   4   // The XHCI debug device is not enabled

+#define USB3DBG_UNINITIALIZED 255 // The XHCI debug device is uninitialized

 

 #define USB3_DEBUG_PORT_WRITE_MAX_PACKET_SIZE 0x08

 

@@ -456,7 +457,7 @@ typedef struct _USB3_DEBUG_PORT_INSTANCE {
   UINT8                                   Initialized;

 

   //

-  // The flag indicates debug device is ready

+  // The flag indicates debug capability is supported

   //

   BOOLEAN                                 DebugSupport;

   

@@ -466,6 +467,26 @@ typedef struct _USB3_DEBUG_PORT_INSTANCE {
   BOOLEAN                                 Ready;

 

   //

+  // The flag indicates the instance is from HOB

+  //

+  BOOLEAN                                 FromHob;

+

+  //

+  // IOMMU PPI Notify registered

+  //

+  BOOLEAN                                 PpiNotifyRegistered;

+

+  //

+  // Prevent notification being interrupted by debug timer

+  //

+  BOOLEAN                                 InNotify;

+

+  //

+  // PciIo protocol event

+  //

+  EFI_PHYSICAL_ADDRESS                    PciIoEvent;

+

+  //

   // The flag indicates if USB 3.0 ports has been turn off/on power

   //  

   BOOLEAN                                 ChangePortPower;

@@ -728,4 +749,39 @@ XhcDataTransfer (
   IN     UINTN                               Timeout

   );

 

+/**

+  Initialize usb debug port hardware.

+

+  @param  Handle           Debug port handle.

+

+  @retval TRUE             The usb debug port hardware configuration is changed.

+  @retval FALSE            The usb debug port hardware configuration is not changed.

+

+**/

+RETURN_STATUS

+EFIAPI

+InitializeUsbDebugHardware (

+  IN USB3_DEBUG_PORT_HANDLE *Handle

+  );

+

+/**

+  Discover and initialize usb debug port.

+

+  @param Handle                  Debug port handle.

+

+**/

+VOID

+DiscoverInitializeUsbDebugPort (

+  IN USB3_DEBUG_PORT_HANDLE     *Handle

+  );

+

+/**

+  Return USB3 debug instance address.

+

+**/  

+USB3_DEBUG_PORT_HANDLE *

+GetUsb3DebugPortInstance (

+  VOID

+  );

+

 #endif //__SERIAL_PORT_LIB_USB__

diff --git a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Pei.c b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Pei.c
index 902a3b626a..40e9b6406b 100644
--- a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Pei.c
+++ b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Pei.c
@@ -1,7 +1,7 @@
 /** @file

   Debug Port Library implementation based on usb3 debug port.

 

-  Copyright (c) 2014 - 2017, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>

   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

@@ -14,13 +14,215 @@
 

 #include <PiPei.h>

 #include <Library/PeiServicesLib.h>

+#include <Library/HobLib.h>

 #include <Ppi/MemoryDiscovered.h>

+#include <Ppi/IoMmu.h>

 #include "DebugCommunicationLibUsb3Internal.h"

 

+GUID                    gUsb3DbgGuid = USB3_DBG_GUID;

+

+/**

+  USB3 IOMMU PPI notify.

+

+  @param[in] PeiServices    Pointer to PEI Services Table.

+  @param[in] NotifyDesc     Pointer to the descriptor for the Notification event that

+                            caused this function to execute.

+  @param[in] Ppi            Pointer to the PPI data associated with this function.

+

+  @retval EFI_STATUS        Always return EFI_SUCCESS

+**/

+EFI_STATUS

+EFIAPI

+Usb3IoMmuPpiNotify (

+  IN EFI_PEI_SERVICES           **PeiServices,

+  IN EFI_PEI_NOTIFY_DESCRIPTOR  *NotifyDesc,

+  IN VOID                       *Ppi

+  )

+{

+  USB3_DEBUG_PORT_HANDLE        *Instance;

+

+  DEBUG ((DEBUG_INFO, "%a()\n", __FUNCTION__));

+

+  Instance = GetUsb3DebugPortInstance ();

+  ASSERT (Instance != NULL);

+

+  Instance->InNotify = TRUE;

+

+  //

+  // Reinitialize USB3 debug port with granted DMA buffer from IOMMU PPI.

+  //

+  InitializeUsbDebugHardware (Instance);

+

+  //

+  // Wait some time for host to be ready after re-initialization.

+  //

+  MicroSecondDelay (1000000);

+

+  Instance->InNotify = FALSE;

+

+  return EFI_SUCCESS;

+}

+

+EFI_PEI_NOTIFY_DESCRIPTOR mUsb3IoMmuPpiNotifyDesc = {

+  (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),

+  &gEdkiiIoMmuPpiGuid,

+  Usb3IoMmuPpiNotify

+};

+

+/**

+  Allocates pages that are suitable for an OperationBusMasterCommonBuffer or

+  OperationBusMasterCommonBuffer64 mapping.

+

+  @param IoMmu                  Pointer to IOMMU PPI.

+  @param Pages                  The number of pages to allocate.

+  @param HostAddress            A pointer to store the base system memory address of the

+                                allocated range.

+  @param DeviceAddress          The resulting map address for the bus master PCI controller to use to

+                                access the hosts HostAddress.

+  @param Mapping                A resulting value to pass to Unmap().

+

+  @retval EFI_SUCCESS           The requested memory pages were allocated.

+  @retval EFI_UNSUPPORTED       Attributes is unsupported. The only legal attribute bits are

+                                MEMORY_WRITE_COMBINE and MEMORY_CACHED.

+  @retval EFI_INVALID_PARAMETER One or more parameters are invalid.

+  @retval EFI_OUT_OF_RESOURCES  The memory pages could not be allocated.

+

+**/

+EFI_STATUS

+IoMmuAllocateBuffer (

+  IN EDKII_IOMMU_PPI        *IoMmu,

+  IN UINTN                  Pages,

+  OUT VOID                  **HostAddress,

+  OUT EFI_PHYSICAL_ADDRESS  *DeviceAddress,

+  OUT VOID                  **Mapping

+  )

+{

+  EFI_STATUS            Status;

+  UINTN                 NumberOfBytes;

+

+  *HostAddress = NULL;

+  *DeviceAddress = 0;

+  *Mapping = NULL;

+

+  Status = IoMmu->AllocateBuffer (

+                    IoMmu,

+                    EfiBootServicesData,

+                    Pages,

+                    HostAddress,

+                    0

+                    );

+  if (EFI_ERROR (Status)) {

+    return EFI_OUT_OF_RESOURCES;

+  }

+

+  NumberOfBytes = EFI_PAGES_TO_SIZE (Pages);

+  Status = IoMmu->Map (

+                    IoMmu,

+                    EdkiiIoMmuOperationBusMasterCommonBuffer,

+                    *HostAddress,

+                    &NumberOfBytes,

+                    DeviceAddress,

+                    Mapping

+                    );

+  if (EFI_ERROR (Status)) {

+    IoMmu->FreeBuffer (IoMmu, Pages, *HostAddress);

+    *HostAddress = NULL;

+    return EFI_OUT_OF_RESOURCES;

+  }

+  Status = IoMmu->SetAttribute (

+                    IoMmu,

+                    *Mapping,

+                    EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE

+                    );

+  if (EFI_ERROR (Status)) {

+    IoMmu->Unmap (IoMmu, *Mapping);

+    IoMmu->FreeBuffer (IoMmu, Pages, *HostAddress);

+    *Mapping = NULL;

+    *HostAddress = NULL;

+    return Status;

+  }

+

+  return Status;

+}

+

+/**

+  USB3 get IOMMU PPI.

+

+  @return Pointer to IOMMU PPI.

+

+**/

+EDKII_IOMMU_PPI *

+Usb3GetIoMmu (

+  VOID

+  )

+{

+  EFI_STATUS                Status;

+  EDKII_IOMMU_PPI           *IoMmu;

+

+  IoMmu = NULL;

+  Status = PeiServicesLocatePpi (

+             &gEdkiiIoMmuPpiGuid,

+             0,

+             NULL,

+             (VOID **) &IoMmu

+             );

+  if (!EFI_ERROR (Status) && (IoMmu != NULL)) {

+    return IoMmu;

+  }

+

+  return NULL;

+}

+

+/**

+  Return USB3 debug instance address.

+

+**/  

+USB3_DEBUG_PORT_HANDLE *

+GetUsb3DebugPortInstance (

+  VOID

+  )

+{

+  USB3_DEBUG_PORT_HANDLE        *Instance;

+  EFI_PEI_HOB_POINTERS          Hob;

+  EFI_STATUS                    Status;

+

+  Hob.Raw = GetFirstGuidHob (&gUsb3DbgGuid);

+  if (Hob.Raw == NULL) {

+    //

+    // Save Instance into HOB

+    //

+    Instance = BuildGuidHob (

+                 &gUsb3DbgGuid,

+                 sizeof (USB3_DEBUG_PORT_HANDLE)

+                 );

+    ASSERT (Instance != NULL);

+    ZeroMem (Instance, sizeof (USB3_DEBUG_PORT_HANDLE));

+

+    Instance->FromHob = TRUE;

+    Instance->Initialized = USB3DBG_UNINITIALIZED;

+  } else {

+    Instance = GET_GUID_HOB_DATA (Hob.Guid);

+  }

+

+  if (!Instance->InNotify) {

+    DiscoverInitializeUsbDebugPort (Instance);

+  }

+

+  if (Instance->Ready &&

+      !Instance->PpiNotifyRegistered &&

+      (Usb3GetIoMmu () == NULL)) {

+    Status = PeiServicesNotifyPpi (&mUsb3IoMmuPpiNotifyDesc);

+    ASSERT_EFI_ERROR (Status);

+    Instance->PpiNotifyRegistered = TRUE;

+  }

+

+  return Instance;

+}

+

 /**

   Allocate aligned memory for XHC's usage.

 

-  @param  BufferSize      The size, in bytes, of the Buffer.

+  @param BufferSize     The size, in bytes, of the Buffer.

   

   @return A pointer to the allocated buffer or NULL if allocation fails.

 

@@ -34,6 +236,9 @@ AllocateAlignBuffer (
   EFI_PHYSICAL_ADDRESS     Address;

   EFI_STATUS               Status;

   VOID                     *MemoryDiscoveredPpi;

+  EDKII_IOMMU_PPI          *IoMmu;

+  VOID                     *HostAddress;

+  VOID                     *Mapping;

 

   Buf = NULL;

 

@@ -47,9 +252,28 @@ AllocateAlignBuffer (
              (VOID **) &MemoryDiscoveredPpi

              );

   if (!EFI_ERROR (Status)) {

-    Status = PeiServicesAllocatePages (EfiACPIMemoryNVS, EFI_SIZE_TO_PAGES (BufferSize), &Address);

-    if (!EFI_ERROR (Status)) {

-      Buf = (VOID *)(UINTN) Address;

+    IoMmu = Usb3GetIoMmu ();

+    if (IoMmu != NULL) {

+      Status = IoMmuAllocateBuffer (

+                 IoMmu,

+                 EFI_SIZE_TO_PAGES (BufferSize),

+                 &HostAddress,

+                 &Address,

+                 &Mapping

+                 );

+      if (!EFI_ERROR (Status)) {

+        ASSERT (Address == ((EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress));

+        Buf = (VOID *)(UINTN) Address;

+      }

+    } else {

+      Status = PeiServicesAllocatePages (

+                 EfiACPIMemoryNVS,

+                 EFI_SIZE_TO_PAGES (BufferSize),

+                 &Address

+                 );

+      if (!EFI_ERROR (Status)) {

+        Buf = (VOID *)(UINTN) Address;

+      }

     }

   }

   return Buf;

diff --git a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Pei.inf b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Pei.inf
index 2108face50..33074db49a 100644
--- a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Pei.inf
+++ b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Pei.inf
@@ -1,7 +1,7 @@
 ## @file

 #  Debug Communication Library instance based on usb3 debug port.

 #

-#  Copyright (c) 2014 - 2017, Intel Corporation. All rights reserved.<BR>

+#  Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>

 #

 #  This program and the accompanying materials

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

@@ -41,6 +41,7 @@
 

 [Ppis]

   gEfiPeiMemoryDiscoveredPpiGuid                ## CONSUMES

+  gEdkiiIoMmuPpiGuid                            ## CONSUMES

 

 [Pcd]

   # The memory BAR of ehci host controller, in which usb debug feature is enabled.

@@ -57,7 +58,7 @@
 

   # The value of data buffer size used for USB debug port handle.

   # It should be equal to sizeof (USB3_DEBUG_PORT_HANDLE).

-  gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugPortHandleBufferSize|239   ## SOMETIMES_CONSUMES

+  gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugPortHandleBufferSize|250   ## SOMETIMES_CONSUMES

 

 [LibraryClasses]

   BaseLib

@@ -67,6 +68,7 @@
   TimerLib

   BaseMemoryLib

   PeiServicesLib

-  

+  HobLib

+

 [Depex.common.PEIM]

   gEfiPeiMemoryDiscoveredPpiGuid