Revert "EhciDxe: Use common buffer for AsyncInterruptTransfer"

There is concern at the thread
https://lists.01.org/pipermail/edk2-devel/2018-November/031951.html.
And the time point is a little sensitive as it is near edk2-stable201811.

This reverts commit 0cd6452503.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c

@@ -763,7 +763,6 @@ EhcControlTransfer (
           Translator,
           EHC_CTRL_TRANSFER,
           Request,
-          FALSE,
           Data,
           *DataLength,
           NULL,
@@ -907,7 +906,6 @@ EhcBulkTransfer (
           Translator,
           EHC_BULK_TRANSFER,
           NULL,
-          FALSE,
           Data[0],
           *DataLength,
           NULL,
@@ -1165,7 +1163,6 @@ EhcSyncInterruptTransfer (
           Translator,
           EHC_INT_TRANSFER_SYNC,
           NULL,
-          FALSE,
           Data,
           *DataLength,
           NULL,

MdeModulePkg/Bus/Pci/EhciDxe/EhciSched.c

@@ -778,6 +778,7 @@ EhciDelAsyncIntTransfer (
       EhcUnlinkQhFromPeriod (Ehc, Urb->Qh);
       RemoveEntryList (&Urb->UrbList);
 
+      gBS->FreePool (Urb->Data);
       EhcFreeUrb (Ehc, Urb);
       return EFI_SUCCESS;
     }
@@ -808,6 +809,7 @@ EhciDelAllAsyncIntTransfers (
     EhcUnlinkQhFromPeriod (Ehc, Urb->Qh);
     RemoveEntryList (&Urb->UrbList);
 
+    gBS->FreePool (Urb->Data);
     EhcFreeUrb (Ehc, Urb);
   }
 }
@@ -846,8 +848,16 @@ EhciInsertAsyncIntTransfer (
   IN UINTN                              Interval
   )
 {
+  VOID      *Data;
   URB       *Urb;
 
+  Data = AllocatePool (DataLen);
+
+  if (Data == NULL) {
+    DEBUG ((DEBUG_ERROR, "%a: failed to allocate buffer\n", __FUNCTION__));
+    return NULL;
+  }
+
   Urb = EhcCreateUrb (
           Ehc,
           DevAddr,
@@ -858,8 +868,7 @@ EhciInsertAsyncIntTransfer (
           Hub,
           EHC_INT_TRANSFER_ASYNC,
           NULL,
-          TRUE,
+          Data,
-          NULL,
           DataLen,
           Callback,
           Context,
@@ -868,6 +877,7 @@ EhciInsertAsyncIntTransfer (
 
   if (Urb == NULL) {
     DEBUG ((DEBUG_ERROR, "%a: failed to create URB\n", __FUNCTION__));
+    gBS->FreePool (Data);
     return NULL;
   }
 
@@ -881,6 +891,60 @@ EhciInsertAsyncIntTransfer (
   return Urb;
 }
 
+/**
+  Flush data from PCI controller specific address to mapped system
+  memory address.
+
+  @param  Ehc                The EHCI device.
+  @param  Urb                The URB to unmap.
+
+  @retval EFI_SUCCESS        Success to flush data to mapped system memory.
+  @retval EFI_DEVICE_ERROR   Fail to flush data to mapped system memory.
+
+**/
+EFI_STATUS
+EhcFlushAsyncIntMap (
+  IN  USB2_HC_DEV         *Ehc,
+  IN  URB                 *Urb
+  )
+{
+  EFI_STATUS                    Status;
+  EFI_PHYSICAL_ADDRESS          PhyAddr;
+  EFI_PCI_IO_PROTOCOL_OPERATION MapOp;
+  EFI_PCI_IO_PROTOCOL           *PciIo;
+  UINTN                         Len;
+  VOID                          *Map;
+
+  PciIo = Ehc->PciIo;
+  Len   = Urb->DataLen;
+
+  if (Urb->Ep.Direction == EfiUsbDataIn) {
+    MapOp = EfiPciIoOperationBusMasterWrite;
+  } else {
+    MapOp = EfiPciIoOperationBusMasterRead;
+  }
+
+  Status = PciIo->Unmap (PciIo, Urb->DataMap);
+  if (EFI_ERROR (Status)) {
+    goto ON_ERROR;
+  }
+
+  Urb->DataMap = NULL;
+
+  Status = PciIo->Map (PciIo, MapOp, Urb->Data, &Len, &PhyAddr, &Map);
+  if (EFI_ERROR (Status) || (Len != Urb->DataLen)) {
+    goto ON_ERROR;
+  }
+
+  Urb->DataPhy  = (VOID *) ((UINTN) PhyAddr);
+  Urb->DataMap  = Map;
+  return EFI_SUCCESS;
+
+ON_ERROR:
+  return EFI_DEVICE_ERROR;
+}
+
+
 /**
   Update the queue head for next round of asynchronous transfer.
 
@@ -986,6 +1050,7 @@ EhcMonitorAsyncRequests (
   BOOLEAN                 Finished;
   UINT8                   *ProcBuf;
   URB                     *Urb;
+  EFI_STATUS              Status;
 
   OldTpl  = gBS->RaiseTPL (EHC_TPL);
   Ehc     = (USB2_HC_DEV *) Context;
@@ -1003,6 +1068,15 @@ EhcMonitorAsyncRequests (
       continue;
     }
 
+    //
+    // Flush any PCI posted write transactions from a PCI host
+    // bridge to system memory.
+    //
+    Status = EhcFlushAsyncIntMap (Ehc, Urb);
+    if (EFI_ERROR (Status)) {
+      DEBUG ((EFI_D_ERROR, "EhcMonitorAsyncRequests: Fail to Flush AsyncInt Mapped Memeory\n"));
+    }
+
     //
     // Allocate a buffer then copy the transferred data for user.
     // If failed to allocate the buffer, update the URB for next

MdeModulePkg/Bus/Pci/EhciDxe/EhciUrb.c

@@ -339,14 +339,6 @@ EhcFreeUrb (
     PciIo->Unmap (PciIo, Urb->DataMap);
   }
 
-  if (Urb->AllocateCommonBuffer) {
-    PciIo->FreeBuffer (
-             PciIo,
-             EFI_SIZE_TO_PAGES (Urb->DataLen),
-             Urb->Data
-             );
-  }
-
   if (Urb->Qh != NULL) {
     //
     // Ensure that this queue head has been unlinked from the
@@ -537,8 +529,7 @@ ON_ERROR:
   @param  Hub                   The transaction translator to use.
   @param  Type                  The transaction type.
   @param  Request               The standard USB request for control transfer.
-  @param  AllocateCommonBuffer  Indicate whether need to allocate common buffer for data transfer.
+  @param  Data                  The user data to transfer.
-  @param  Data                  The user data to transfer, NULL if AllocateCommonBuffer is TRUE.
   @param  DataLen               The length of data buffer.
   @param  Callback              The function to call when data is transferred.
   @param  Context               The context to the callback.
@@ -558,7 +549,6 @@ EhcCreateUrb (
   IN EFI_USB2_HC_TRANSACTION_TRANSLATOR *Hub,
   IN UINTN                              Type,
   IN EFI_USB_DEVICE_REQUEST             *Request,
-  IN BOOLEAN                            AllocateCommonBuffer,
   IN VOID                               *Data,
   IN UINTN                              DataLen,
   IN EFI_ASYNC_USB_TRANSFER_CALLBACK    Callback,
@@ -606,24 +596,8 @@ EhcCreateUrb (
   Ep->PollRate    = EhcConvertPollRate (Interval);
 
   Urb->Request    = Request;
-  if (AllocateCommonBuffer) {
-    ASSERT (Data == NULL);
-    Status = Ehc->PciIo->AllocateBuffer (
-                           Ehc->PciIo,
-                           AllocateAnyPages,
-                           EfiBootServicesData,
-                           EFI_SIZE_TO_PAGES (DataLen),
-                           &Data,
-                           0
-                           );
-    if (EFI_ERROR (Status) || (Data == NULL)) {
-      FreePool (Urb);
-      return NULL;
-    }
-  }
   Urb->Data       = Data;
   Urb->DataLen    = DataLen;
-  Urb->AllocateCommonBuffer = AllocateCommonBuffer;
   Urb->Callback   = Callback;
   Urb->Context    = Context;
 
@@ -653,15 +627,11 @@ EhcCreateUrb (
   if (Data != NULL) {
     Len     = DataLen;
 
-    if (Urb->AllocateCommonBuffer) {
-      MapOp = EfiPciIoOperationBusMasterCommonBuffer;
-    } else {
     if (Ep->Direction == EfiUsbDataIn) {
       MapOp = EfiPciIoOperationBusMasterWrite;
     } else {
       MapOp = EfiPciIoOperationBusMasterRead;
     }
-    }
 
     Status  = PciIo->Map (PciIo, MapOp, Data, &Len, &PhyAddr, &Map);
 

MdeModulePkg/Bus/Pci/EhciDxe/EhciUrb.h

@@ -3,7 +3,7 @@
     This file contains URB request, each request is warpped in a
     URB (Usb Request Block).
 
-Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2007 - 2010, 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
@@ -216,7 +216,6 @@ struct _URB {
   EFI_USB_DEVICE_REQUEST          *Request;     // Control transfer only
   VOID                            *RequestPhy;  // Address of the mapped request
   VOID                            *RequestMap;
-  BOOLEAN                         AllocateCommonBuffer;
   VOID                            *Data;
   UINTN                           DataLen;
   VOID                            *DataPhy;     // Address of the mapped user data
@@ -308,8 +307,7 @@ EhcFreeUrb (
   @param  Hub        The transaction translator to use.
   @param  Type       The transaction type.
   @param  Request    The standard USB request for control transfer.
-  @param  AllocateCommonBuffer  Indicate whether need to allocate common buffer for data transfer.
+  @param  Data       The user data to transfer.
-  @param  Data                  The user data to transfer, NULL if AllocateCommonBuffer is TRUE.
   @param  DataLen    The length of data buffer.
   @param  Callback   The function to call when data is transferred.
   @param  Context    The context to the callback.
@@ -329,7 +327,6 @@ EhcCreateUrb (
   IN EFI_USB2_HC_TRANSACTION_TRANSLATOR *Hub,
   IN UINTN                              Type,
   IN EFI_USB_DEVICE_REQUEST             *Request,
-  IN BOOLEAN                            AllocateCommonBuffer,
   IN VOID                               *Data,
   IN UINTN                              DataLen,
   IN EFI_ASYNC_USB_TRANSFER_CALLBACK    Callback,