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OvmfPkg/VirtioMmioDeviceLib: 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 06:57:16 -04:00 committed by Laszlo Ersek
parent 4157b8416a
commit 084cfc1a35
3 changed files with 99 additions and 2 deletions
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8
OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.c
View File

@ -3,6 +3,7 @@
This driver produces Virtio Device Protocol instances for Virtio Mmio devices.
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
@ -15,7 +16,6 @@
**/
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include "VirtioMmioDevice.h"
@ -35,7 +35,11 @@ static VIRTIO_DEVICE_PROTOCOL mMmioDeviceProtocolTemplate = {
VirtioMmioGetDeviceStatus, // GetDeviceStatus
VirtioMmioSetDeviceStatus, // SetDeviceStatus
VirtioMmioDeviceWrite, // WriteDevice
VirtioMmioDeviceRead // ReadDevice
VirtioMmioDeviceRead, // ReadDevice
VirtioMmioAllocateSharedPages, // AllocateSharedPages
VirtioMmioFreeSharedPages, // FreeSharedPages
VirtioMmioMapSharedBuffer, // MapSharedBuffer
VirtioMmioUnmapSharedBuffer // UnmapSharedBuffer
};
/**

36
OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h
View File

@ -3,6 +3,7 @@
Internal definitions for the VirtIo MMIO 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
@ -25,6 +26,7 @@
#include <Library/IoLib.h>
#include <Library/UefiLib.h>
#include <Library/VirtioMmioDeviceLib.h>
#include <Library/MemoryAllocationLib.h>
#define VIRTIO_MMIO_DEVICE_SIGNATURE SIGNATURE_32 ('V', 'M', 'I', 'O')
@ -137,4 +139,38 @@ VirtioMmioSetGuestFeatures (
IN UINT64 Features
);
EFI_STATUS
EFIAPI
VirtioMmioAllocateSharedPages (
IN VIRTIO_DEVICE_PROTOCOL *This,
IN UINTN NumPages,
OUT VOID **HostAddress
);
VOID
EFIAPI
VirtioMmioFreeSharedPages (
IN VIRTIO_DEVICE_PROTOCOL *This,
IN UINTN NumPages,
IN VOID *HostAddress
);
EFI_STATUS
EFIAPI
VirtioMmioMapSharedBuffer (
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
VirtioMmioUnmapSharedBuffer (
IN VIRTIO_DEVICE_PROTOCOL *This,
IN VOID *Mapping
);
#endif // _VIRTIO_MMIO_DEVICE_INTERNAL_H_

57
OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDeviceFunctions.c
View File

@ -293,3 +293,60 @@ VirtioMmioDeviceRead (
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
VirtioMmioAllocateSharedPages (
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
VirtioMmioFreeSharedPages (
IN VIRTIO_DEVICE_PROTOCOL *This,
IN UINTN NumPages,
IN VOID *HostAddress
)
{
FreePages (HostAddress, NumPages);
}
EFI_STATUS
EFIAPI
VirtioMmioMapSharedBuffer (
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
VirtioMmioUnmapSharedBuffer (
IN VIRTIO_DEVICE_PROTOCOL *This,
IN VOID *Mapping
)
{
return EFI_SUCCESS;
}