Code Scrub for Protocol and Ppi Definition

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5564 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Include/Protocol/DeviceIo.h

@@ -4,7 +4,7 @@
   Device IO is used to abstract hardware access to devices. It includes
   memory mapped IO, IO, PCI Config space, and DMA.
 
-  Copyright (c) 2006, Intel Corporation                                                         
+  Copyright (c) 2006 - 2008, Intel Corporation                                                         
   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        
@@ -213,6 +213,40 @@ EFI_STATUS
   IN EFI_PHYSICAL_ADDRESS             HostAddress
   );
 
+/**
+  @par Protocol Description:
+  This protocol provides the basic Memory, I/O, and PCI interfaces that 
+  are used to abstract accesses to devices.
+
+  @param Mem 
+  Allows reads and writes to memory mapped I/O space.
+
+  @param Io 
+  Allows reads and writes to I/O space.
+
+  @param Pci 
+  Allows reads and writes to PCI configuration space.
+
+  @param Map 
+  Provides the device specific addresses needed to access system memory for DMA. 
+
+  @param PciDevicePath 
+  Provides an EFI Device Path for a PCI device with the given PCI
+  configuration space address.
+
+  @param Unmap 
+  Releases any resources allocated by Map(). 
+
+  @param AllocateBuffer 
+  Allocates pages that are suitable for a common buffer mapping. 
+
+  @param Flush 
+  Flushes any posted write data to the device. 
+
+  @param FreeBuffer 
+  Free pages that were allocated with AllocateBuffer(). 
+
+**/ 
 struct _EFI_DEVICE_IO_PROTOCOL {
   EFI_IO_ACCESS           Mem;
   EFI_IO_ACCESS           Io;