[PATCH V2 1/4] MdeModulePkg XhciDxe: Extract new XhciInsertAsyncIntTransfer function

[Star Zeng <star.zeng@intel.com>]

V2:
Add the missing "FreePool (Data);".
Remove the unnecessary indentation change.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1274

Extract new XhciInsertAsyncIntTransfer function from
XhcAsyncInterruptTransfer.

It is code preparation for following patch,
no essential functional change.

Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
---
 MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c      | 18 +--------
 MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c | 65 ++++++++++++++++++++++++++++++++
 MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.h | 28 ++++++++++++++
 3 files changed, 94 insertions(+), 17 deletions(-)

diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
index f1c60bef01c0..7f64f9c7c982 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
@@ -1346,7 +1346,6 @@ XhcAsyncInterruptTransfer (
   EFI_STATUS              Status;
   UINT8                   SlotId;
   UINT8                   Index;
-  UINT8                   *Data;
   EFI_TPL                 OldTpl;
 
   //
@@ -1413,36 +1412,21 @@ XhcAsyncInterruptTransfer (
     goto ON_EXIT;
   }
 
-  Data = AllocateZeroPool (DataLength);
-
-  if (Data == NULL) {
-    DEBUG ((EFI_D_ERROR, "XhcAsyncInterruptTransfer: failed to allocate buffer\n"));
-    Status = EFI_OUT_OF_RESOURCES;
-    goto ON_EXIT;
-  }
-
-  Urb = XhcCreateUrb (
+  Urb = XhciInsertAsyncIntTransfer (
           Xhc,
           DeviceAddress,
           EndPointAddress,
           DeviceSpeed,
           MaximumPacketLength,
-          XHC_INT_TRANSFER_ASYNC,
-          NULL,
-          Data,
           DataLength,
           CallBackFunction,
           Context
           );
-
   if (Urb == NULL) {
-    DEBUG ((EFI_D_ERROR, "XhcAsyncInterruptTransfer: failed to create URB\n"));
-    FreePool (Data);
     Status = EFI_OUT_OF_RESOURCES;
     goto ON_EXIT;
   }
 
-  InsertHeadList (&Xhc->AsyncIntTransfers, &Urb->UrbList);
   //
   // Ring the doorbell
   //
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c b/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c
index 166c44bf5e66..75959ae08363 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c
@@ -1411,6 +1411,71 @@ XhciDelAllAsyncIntTransfers (
 }
 
 /**
+  Insert a single asynchronous interrupt transfer for
+  the device and endpoint.
+
+  @param Xhc            The XHCI Instance
+  @param BusAddr        The logical device address assigned by UsbBus driver
+  @param EpAddr         Endpoint addrress
+  @param DevSpeed       The device speed
+  @param MaxPacket      The max packet length of the endpoint
+  @param DataLen        The length of data buffer
+  @param Callback       The function to call when data is transferred
+  @param Context        The context to the callback
+
+  @return Created URB or NULL
+
+**/
+URB *
+XhciInsertAsyncIntTransfer (
+  IN USB_XHCI_INSTANCE                  *Xhc,
+  IN UINT8                              BusAddr,
+  IN UINT8                              EpAddr,
+  IN UINT8                              DevSpeed,
+  IN UINTN                              MaxPacket,
+  IN UINTN                              DataLen,
+  IN EFI_ASYNC_USB_TRANSFER_CALLBACK    Callback,
+  IN VOID                               *Context
+  )
+{
+  VOID      *Data;
+  URB       *Urb;
+
+  Data = AllocateZeroPool (DataLen);
+  if (Data == NULL) {
+    DEBUG ((DEBUG_ERROR, "%a: failed to allocate buffer\n", __FUNCTION__));
+    return NULL;
+  }
+
+  Urb = XhcCreateUrb (
+          Xhc,
+          BusAddr,
+          EpAddr,
+          DevSpeed,
+          MaxPacket,
+          XHC_INT_TRANSFER_ASYNC,
+          NULL,
+          Data,
+          DataLen,
+          Callback,
+          Context
+          );
+  if (Urb == NULL) {
+    DEBUG ((DEBUG_ERROR, "%a: failed to create URB\n", __FUNCTION__));
+    FreePool (Data);
+    return NULL;
+  }
+
+  //
+  // New asynchronous transfer must inserted to the head.
+  // Check the comments in XhcMoniteAsyncRequests
+  //
+  InsertHeadList (&Xhc->AsyncIntTransfers, &Urb->UrbList);
+
+  return Urb;
+}
+
+/**
   Update the queue head for next round of asynchronous transfer
 
   @param  Xhc     The XHCI Instance.
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.h b/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.h
index 097408828a1f..cd1403f2842a 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.h
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.h
@@ -853,6 +853,34 @@ XhciDelAllAsyncIntTransfers (
   );
 
 /**
+  Insert a single asynchronous interrupt transfer for
+  the device and endpoint.
+
+  @param Xhc            The XHCI Instance
+  @param BusAddr        The logical device address assigned by UsbBus driver
+  @param EpAddr         Endpoint addrress
+  @param DevSpeed       The device speed
+  @param MaxPacket      The max packet length of the endpoint
+  @param DataLen        The length of data buffer
+  @param Callback       The function to call when data is transferred
+  @param Context        The context to the callback
+
+  @return Created URB or NULL
+
+**/
+URB *
+XhciInsertAsyncIntTransfer (
+  IN USB_XHCI_INSTANCE                  *Xhc,
+  IN UINT8                              DeviceAddress,
+  IN UINT8                              EndPointAddress,
+  IN UINT8                              DeviceSpeed,
+  IN UINTN                              MaximumPacketLength,
+  IN UINTN                              DataLength,
+  IN EFI_ASYNC_USB_TRANSFER_CALLBACK    CallBackFunction,
+  IN VOID                               *Context
+  );
+
+/**
   Set Bios Ownership
 
   @param  Xhc          The XHCI Instance.
-- 
2.7.0.windows.1