The patch implements the newly added IOMMU-like member functions by
respectively delegating the job to:
- VIRTIO_DEVICE_PROTOCOL.AllocateSharedPages () ->
MemoryAllocationLib.AllocatePages()
- VIRTIO_DEVICE_PROTOCOL.FreeSharedPages () ->
MemoryAllocationLib.FreePages ()
- VIRTIO_DEVICE_PROTOCOL.MapSharedBuffer () -> no-op
- VIRTIO_DEVICE_PROTOCOL.UnmapSharedBuffer () -> no-op
Suggested-by: Laszlo Ersek <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Jordan Justen <[email protected]>
Cc: Tom Lendacky <[email protected]>
Cc: Laszlo Ersek <[email protected]>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Brijesh Singh <[email protected]>
---
OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.h | 34 ++++++++++++
OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.c | 7 ++-
OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c | 58 ++++++++++++++++++++
3 files changed, 98 insertions(+), 1 deletion(-)
diff --git a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.h
b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.h
index 6f51f816ef0f..41df5a98e560 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 (
IN UINT8 DeviceStatus
);
+EFI_STATUS
+EFIAPI
+VirtioPciAllocateSharedPages (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN NumPages,
+ OUT VOID **HostAddress
+ );
+
+VOID
+EFIAPI
+VirtioPciFreeSharedPages (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN NumPages,
+ IN VOID *HostAddress
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioPciMapSharedBuffer (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN VIRTIO_MAP_OPERATION Operation,
+ IN VOID *HostAddress,
+ IN OUT UINTN *NumberOfBytes,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioPciUnmapSharedBuffer (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN VOID *Mapping
+ );
#endif // _VIRTIO_PCI_DEVICE_DXE_H_
diff --git a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.c
b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.c
index e41730456471..b847f3c02528 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 5f86914265ea..4597095deb78 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 +272,60 @@ VirtioPciSetDeviceStatus (
return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_DEVICE_STATUS,
sizeof (UINT8), DeviceStatus);
}
+
+EFI_STATUS
+EFIAPI
+VirtioPciAllocateSharedPages (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN NumPages,
+ OUT VOID **HostAddress
+ )
+{
+ VOID *Buffer;
+
+ Buffer = AllocatePages (NumPages);
+ if (Buffer == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ *HostAddress = Buffer;
+ return EFI_SUCCESS;
+}
+
+VOID
+EFIAPI
+VirtioPciFreeSharedPages (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN NumPages,
+ IN VOID *HostAddress
+ )
+{
+ FreePages (HostAddress, NumPages);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciMapSharedBuffer (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN VIRTIO_MAP_OPERATION Operation,
+ IN VOID *HostAddress,
+ IN OUT UINTN *NumberOfBytes,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ )
+{
+ *DeviceAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;
+ *Mapping = NULL;
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciUnmapSharedBuffer (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ OUT VOID *Mapping
+ )
+{
+ return EFI_SUCCESS;
+}
--
2.7.4
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