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OvmfPkg/VirtioPciDeviceDxe: implement IOMMU-like member functions 

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 <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Brijesh Singh 2017-08-23 06:57:15 -04:00 committed by Laszlo Ersek
parent de1c57c5f5
commit 4157b8416a
3 changed files with 98 additions and 1 deletions
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7
OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.c
View File

@ -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
};
/**

34
OvmfPkg/VirtioPciDeviceDxe/VirtioPciDevice.h
View File

@ -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_

58
OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c
View File

@ -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,
IN VOID *Mapping
)
{
return EFI_SUCCESS;
}