bc8fde6f62
The virtio-1.0 spec widens the Features bitmap to 64 bits. Modify the declarations of the GetDeviceFeatures() and SetGuestFeatures() protocol member functions accordingly. Normally, a protocol cannot be changed in incompatible ways if the GUID stays the same; however, we've always been extremely clear that VIRTIO_DEVICE_PROTOCOL is internal to edk2. See for example the top of "OvmfPkg/Include/Protocol/VirtioDevice.h". In this patch, all producers and consumers of the GetDeviceFeatures() and SetGuestFeatures() protocol members are updated. The drivers that currently produce these members are "legacy" drivers (in virtio-1.0 terminology), and they cannot (and will not) handle feature bits above BIT31. Therefore their conversion is only for compatibility with the modified protocol interface. The consumers will be responsible for checking the VIRTIO_DEVICE_PROTOCOL.Revision field, and for not passing feature bits that these backends cannot handle. The VirtioMmioGetDeviceFeatures() implementation stores the result of an MmioRead32() call with normal assignment, so it needs no change beyond adapting its prototype. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
148 lines
3.4 KiB
C
148 lines
3.4 KiB
C
/** @file
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Internal definitions for the VirtIo MMIO Device driver
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Copyright (C) 2013, ARM Ltd
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
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WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _VIRTIO_MMIO_DEVICE_INTERNAL_H_
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#define _VIRTIO_MMIO_DEVICE_INTERNAL_H_
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#include <Protocol/VirtioDevice.h>
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#include <IndustryStandard/Virtio.h>
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#include <Library/DebugLib.h>
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#include <Library/IoLib.h>
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#include <Library/UefiLib.h>
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#include <Library/VirtioMmioDeviceLib.h>
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#define VIRTIO_MMIO_DEVICE_SIGNATURE SIGNATURE_32 ('V', 'M', 'I', 'O')
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typedef struct {
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UINT32 Signature;
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VIRTIO_DEVICE_PROTOCOL VirtioDevice;
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PHYSICAL_ADDRESS BaseAddress;
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} VIRTIO_MMIO_DEVICE;
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#define VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE(Device) \
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CR (Device, VIRTIO_MMIO_DEVICE, VirtioDevice, VIRTIO_MMIO_DEVICE_SIGNATURE)
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#define VIRTIO_CFG_WRITE(Device, Offset, Val) \
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(MmioWrite32 (Device->BaseAddress + (Offset), Val))
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#define VIRTIO_CFG_READ(Device, Offset) \
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(MmioRead32 (Device->BaseAddress + (Offset)))
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EFI_STATUS
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EFIAPI
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VirtioMmioDeviceRead (
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IN VIRTIO_DEVICE_PROTOCOL *This,
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IN UINTN FieldOFfset,
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IN UINTN FieldSize,
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IN UINTN BufferSize,
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OUT VOID* Buffer
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioDeviceWrite (
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IN VIRTIO_DEVICE_PROTOCOL *This,
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IN UINTN FieldOffset,
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IN UINTN FieldSize,
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IN UINT64 Value
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioGetDeviceFeatures (
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IN VIRTIO_DEVICE_PROTOCOL *This,
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OUT UINT64 *DeviceFeatures
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioGetQueueAddress (
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IN VIRTIO_DEVICE_PROTOCOL *This,
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OUT UINT32 *QueueAddress
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioGetQueueSize (
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IN VIRTIO_DEVICE_PROTOCOL *This,
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OUT UINT16 *QueueNumMax
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioGetDeviceStatus (
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IN VIRTIO_DEVICE_PROTOCOL *This,
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OUT UINT8 *DeviceStatus
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioSetQueueSize (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT16 QueueSize
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioSetDeviceStatus (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT8 DeviceStatus
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioSetQueueNotify (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT16 QueueNotify
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioSetQueueSel (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT16 Sel
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);
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EFI_STATUS
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VirtioMmioSetQueueAddress (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT32 Address
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioSetQueueAlignment (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT32 Alignment
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioSetPageSize (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT32 PageSize
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);
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EFI_STATUS
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EFIAPI
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VirtioMmioSetGuestFeatures (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT64 Features
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);
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#endif // _VIRTIO_MMIO_DEVICE_INTERNAL_H_
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