[cgutman] 41039: - Fix our DMA implementation to use documented structs

Author: cgutman
Date: Fri May 22 05:26:18 2009
New Revision: 41039

URL: http://svn.reactos.org/svn/reactos?rev=41039&view=rev
Log:
 - Fix our DMA implementation to use documented structs

Modified:
    trunk/reactos/drivers/network/ndis/ndis/io.c

Modified: trunk/reactos/drivers/network/ndis/ndis/io.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/network/ndis/ndis/…
==============================================================================
--- trunk/reactos/drivers/network/ndis/ndis/io.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/network/ndis/ndis/io.c [iso-8859-1] Fri May 22 05:26:18 2009
@@ -503,14 +503,17 @@
 VOID
 EXPORT
 NdisMDeregisterDmaChannel(
-    IN  PNDIS_HANDLE    MiniportDmaHandle)
-{
-    PNDIS_MINIPORT_BLOCK NdisMiniportBlock = (PNDIS_MINIPORT_BLOCK)MiniportDmaHandle;
-    PDMA_ADAPTER AdapterObject = NdisMiniportBlock->SystemAdapterObject;
+    IN  NDIS_HANDLE    MiniportDmaHandle)
+{
+    PNDIS_DMA_BLOCK DmaBlock = MiniportDmaHandle;
+    PDMA_ADAPTER AdapterObject = (PDMA_ADAPTER)DmaBlock->SystemAdapterObject;
+
+    if (AdapterObject ==
((PLOGICAL_ADAPTER)DmaBlock->Miniport)->NdisMiniportBlock.SystemAdapterObject)
+       
((PLOGICAL_ADAPTER)DmaBlock->Miniport)->NdisMiniportBlock.SystemAdapterObject =
NULL;
 
     AdapterObject->DmaOperations->PutDmaAdapter(AdapterObject);
 
-    NdisMiniportBlock->SystemAdapterObject = NULL;
+    ExFreePool(DmaBlock);
 }
 
 
@@ -650,13 +653,10 @@
 NdisMReadDmaCounter(
     IN  NDIS_HANDLE MiniportDmaHandle)
 {
-  PNDIS_MINIPORT_BLOCK MiniportBlock = (PNDIS_MINIPORT_BLOCK)MiniportDmaHandle;
-  PDMA_ADAPTER AdapterObject = MiniportBlock->SystemAdapterObject;
-
-  NDIS_DbgPrint(MAX_TRACE, ("Called.\n"));
-
-  if (AdapterObject == NULL)
-    return 0;
+  PNDIS_DMA_BLOCK DmaBlock = MiniportDmaHandle;
+  PDMA_ADAPTER AdapterObject = (PDMA_ADAPTER)DmaBlock->SystemAdapterObject;
+
+  NDIS_DbgPrint(MAX_TRACE, ("Called.\n"));
 
   return AdapterObject->DmaOperations->ReadDmaCounter(AdapterObject);
 }
@@ -670,13 +670,10 @@
 NdisMGetDmaAlignment(
     IN  NDIS_HANDLE MiniportDmaHandle)
 {
-  PNDIS_MINIPORT_BLOCK MiniportBlock = (PNDIS_MINIPORT_BLOCK)MiniportDmaHandle;
-  PDMA_ADAPTER AdapterObject = MiniportBlock->SystemAdapterObject;
-
-  NDIS_DbgPrint(MAX_TRACE, ("Called.\n"));
-
-  if (AdapterObject == NULL)
-    return 0;
+  PNDIS_DMA_BLOCK DmaBlock = MiniportDmaHandle;
+  PDMA_ADAPTER AdapterObject = (PDMA_ADAPTER)DmaBlock->SystemAdapterObject;
+
+  NDIS_DbgPrint(MAX_TRACE, ("Called.\n"));
 
   return AdapterObject->DmaOperations->GetDmaAlignment(AdapterObject);
 }
@@ -698,15 +695,9 @@
   PLOGICAL_ADAPTER Adapter = (PLOGICAL_ADAPTER)MiniportAdapterHandle;
   DEVICE_DESCRIPTION DeviceDesc;
   ULONG MapRegisters;
-
-  NDIS_DbgPrint(MAX_TRACE, ("Called.\n"));
-
-  if (Adapter->NdisMiniportBlock.SystemAdapterObject)
-  {
-      NDIS_DbgPrint(MIN_TRACE,("Using existing DMA adapter\n"));
-      *MiniportDmaHandle = &Adapter->NdisMiniportBlock;
-      return NDIS_STATUS_SUCCESS;
-  }
+  PNDIS_DMA_BLOCK DmaBlock;
+
+  NDIS_DbgPrint(MAX_TRACE, ("Called.\n"));
 
   RtlZeroMemory(&DeviceDesc, sizeof(DEVICE_DESCRIPTION));
 
@@ -724,13 +715,23 @@
   DeviceDesc.DmaSpeed = DmaDescription->DmaSpeed;
   DeviceDesc.MaximumLength = MaximumLength;
 
-  Adapter->NdisMiniportBlock.SystemAdapterObject = 
-         IoGetDmaAdapter(Adapter->NdisMiniportBlock.PhysicalDeviceObject,
&DeviceDesc, &MapRegisters);
-
-  if (!Adapter->NdisMiniportBlock.SystemAdapterObject)
+
+  DmaBlock = ExAllocatePool(NonPagedPool, sizeof(NDIS_DMA_BLOCK));
+  if (!DmaBlock)
       return NDIS_STATUS_RESOURCES;
 
-  *MiniportDmaHandle = &Adapter->NdisMiniportBlock;
+  DmaBlock->SystemAdapterObject =
(PVOID)IoGetDmaAdapter(Adapter->NdisMiniportBlock.PhysicalDeviceObject,
&DeviceDesc, &MapRegisters);
+
+  if (!DmaBlock->SystemAdapterObject) {
+      ExFreePool(DmaBlock);
+      return NDIS_STATUS_RESOURCES;
+  }
+
+  Adapter->NdisMiniportBlock.SystemAdapterObject =
(PDMA_ADAPTER)DmaBlock->SystemAdapterObject;
+
+  DmaBlock->Miniport = Adapter;
+
+  *MiniportDmaHandle = DmaBlock;
 
   return NDIS_STATUS_SUCCESS;
 }