OvmfPkg/IoMmuDxe/AmdSevIoMmu.h

   1 /** @file
   2
   3   The protocol provides support to allocate, free, map and umap a DMA buffer for
   4   bus master (e.g PciHostBridge). When SEV is enabled, the DMA operations must
   5   be performed on unencrypted buffer hence protocol clear the encryption bit
   6   from the DMA buffer.
   7
   8   Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
   9   Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
  10   This program and the accompanying materials are licensed and made available
  11   under the terms and conditions of the BSD License which accompanies this
  12   distribution.  The full text of the license may be found at
  13   http://opensource.org/licenses/bsd-license.php
  14
  15   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  16   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  17
  18 **/
  19
  20 #ifndef __AMD_SEV_IOMMU_H_
  21 #define __AMD_SEV_IOMMU_H
  22
  23 #include <Protocol/IoMmu.h>
  24
  25 #include <Library/BaseLib.h>
  26 #include <Library/DebugLib.h>
  27 #include <Library/BaseMemoryLib.h>
  28 #include <Library/MemoryAllocationLib.h>
  29 #include <Library/UefiBootServicesTableLib.h>
  30 #include <Library/MemEncryptSevLib.h>
  31
  32 /**
  33   Install IOMMU protocol to provide the DMA support for PciHostBridge and
  34   MemEncryptSevLib.
  35
  36 **/
  37 VOID
  38 EFIAPI
  39 AmdSevInstallIoMmuProtocol (
  40   VOID
  41   );
  42
  43 #endif