The patch implements the newly added member functions by respectively
delegating the job to:

- MemoryApplicationLib.AllocatePages () -- with BootServicesData
- MemoryApplicationLib.FreePages ()
- no-op (host address is same as device DMA address)
- no-op

Suggested-by: Laszlo Ersek <ler...@redhat.com>
Cc: Ard Biesheuvel <ard.biesheu...@linaro.org>
Cc: Jordan Justen <jordan.l.jus...@intel.com>
Cc: Tom Lendacky <thomas.lenda...@amd.com>
Cc: Laszlo Ersek <ler...@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Brijesh Singh <brijesh.si...@amd.com>
---
 OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.h    | 34 ++++++++++
 OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.c    |  7 ++-
 OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c | 66 ++++++++++++++++++++
 3 files changed, 106 insertions(+), 1 deletion(-)

diff --git a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.h 
b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.h
index 8f17a16c88f5..da98de123000 100644
--- a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.h
+++ b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.h
@@ -3,6 +3,7 @@
   Internal definitions for the VirtIo PCI Device driver
 
   Copyright (C) 2013, ARM Ltd
+  Copyright (c) 2017, AMD Inc, 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
@@ -156,4 +157,37 @@ VirtioPciSetDeviceStatus (
   UINT8                          DeviceStatus
   );
 
+EFI_STATUS
+EFIAPI
+VirtioPciAllocateSharedPages (
+  VIRTIO_DEVICE_PROTOCOL        *This,
+  UINTN                         NumPages,
+  VOID                          **HostAddress
+  );
+
+VOID
+EFIAPI
+VirtioPciFreeSharedPages (
+  VIRTIO_DEVICE_PROTOCOL        *This,
+  UINTN                         NumPages,
+  VOID                          *HostAddress
+  );
+
+EFI_STATUS
+EFIAPI
+VirtioPciMapSharedBuffer (
+  VIRTIO_DEVICE_PROTOCOL        *This,
+  VIRTIO_MAP_OPERATION          Operation,
+  VOID                          *HostAddress,
+  UINTN                         *NumberOfBytes,
+  EFI_PHYSICAL_ADDRESS          *DeviceAddress,
+  VOID                          **Mapping
+  );
+
+EFI_STATUS
+EFIAPI
+VirtioPciUnmapSharedBuffer (
+  VIRTIO_DEVICE_PROTOCOL        *This,
+  VOID                          *Mapping
+  );
 #endif // _VIRTIO_PCI_DEVICE_DXE_H_
diff --git a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.c 
b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.c
index bc4f6fe8bfa3..4e4e21d9a477 100644
--- a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.c
+++ b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.c
@@ -5,6 +5,7 @@
   Copyright (C) 2012, Red Hat, Inc.
   Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>
   Copyright (C) 2013, ARM Ltd.
+  Copyright (C) 2017, AMD Inc, 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
@@ -40,7 +41,11 @@ STATIC VIRTIO_DEVICE_PROTOCOL mDeviceProtocolTemplate = {
   VirtioPciGetDeviceStatus,             // GetDeviceStatus
   VirtioPciSetDeviceStatus,             // SetDeviceStatus
   VirtioPciDeviceWrite,                 // WriteDevice
-  VirtioPciDeviceRead                   // ReadDevice
+  VirtioPciDeviceRead,                  // ReadDevice
+  VirtioPciAllocateSharedPages,         // AllocateSharedPages
+  VirtioPciFreeSharedPages,             // FreeSharedPages
+  VirtioPciMapSharedBuffer,             // MapSharedBuffer
+  VirtioPciUnmapSharedBuffer,           // UnmapSharedBuffer
 };
 
 /**
diff --git a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c 
b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c
index 243aa14c2421..1c587e184311 100644
--- a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c
+++ b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c
@@ -5,6 +5,7 @@
   Copyright (C) 2012, Red Hat, Inc.
   Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
   Copyright (C) 2013, ARM Ltd.
+  Copyright (C) 2017, AMD Inc, 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
@@ -271,3 +272,68 @@ VirtioPciSetDeviceStatus (
   return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_DEVICE_STATUS,
       sizeof (UINT8), DeviceStatus);
 }
+
+EFI_STATUS
+EFIAPI
+VirtioPciAllocateSharedPages (
+  VIRTIO_DEVICE_PROTOCOL  *This,
+  UINTN                   NumPages,
+  VOID                    **HostAddress
+  )
+{
+  EFI_STATUS              Status;
+  EFI_PHYSICAL_ADDRESS    PhysicalAddress;
+
+  Status = gBS->AllocatePages (
+                  AllocateAnyPages,
+                  EfiBootServicesData,
+                  NumPages,
+                  &PhysicalAddress
+                  );
+  if (!EFI_ERROR (Status)) {
+    *HostAddress = (VOID *) (UINTN) PhysicalAddress;
+  }
+
+  return Status;
+}
+
+VOID
+EFIAPI
+VirtioPciFreeSharedPages (
+  VIRTIO_DEVICE_PROTOCOL  *This,
+  UINTN                   NumPages,
+  VOID                    *HostAddress
+  )
+{
+  gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN)HostAddress, NumPages);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciMapSharedBuffer (
+  VIRTIO_DEVICE_PROTOCOL  *This,
+  VIRTIO_MAP_OPERATION    Operation,
+  VOID                    *HostAddress,
+  UINTN                   *NumberOfBytes,
+  EFI_PHYSICAL_ADDRESS    *DeviceAddress,
+  VOID                    **Mapping
+  )
+{
+  EFI_PHYSICAL_ADDRESS    PhysicalAddress;
+
+  PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;
+
+  *DeviceAddress = PhysicalAddress;
+
+  return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciUnmapSharedBuffer (
+  VIRTIO_DEVICE_PROTOCOL    *This,
+  VOID                      *Mapping
+  )
+{
+  return EFI_SUCCESS;
+}
-- 
2.7.4

_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel

Reply via email to