OvmfPkg/Virtio10Dxe/Virtio10.h

/** @file
  Private definitions of the VirtIo 1.0 driver.

  Copyright (C) 2016, Red Hat, Inc.

  This program and the accompanying materials are licensed and made available
  under the terms and conditions of the BSD License which accompanies this
  distribution. The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
  WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/

#ifndef _VIRTIO_1_0_DXE_H_
#define _VIRTIO_1_0_DXE_H_

#include <Protocol/PciIo.h>
#include <Protocol/VirtioDevice.h>

#define VIRTIO_1_0_SIGNATURE SIGNATURE_32 ('V', 'I', 'O', '1')

//
// Type of the PCI BAR that contains a VirtIo 1.0 config structure.
//
typedef enum {
  Virtio10BarTypeMem,
  Virtio10BarTypeIo
} VIRTIO_1_0_BAR_TYPE;

//
// The type below defines the access to a VirtIo 1.0 config structure.
//
typedef struct {
  BOOLEAN             Exists;  // The device exposes this structure
  VIRTIO_1_0_BAR_TYPE BarType;
  UINT8               Bar;
  UINT32              Offset;  // Offset into BAR where structure starts
  UINT32              Length;  // Length of structure in BAR.
} VIRTIO_1_0_CONFIG;

typedef struct {
  UINT32                 Signature;
  VIRTIO_DEVICE_PROTOCOL VirtIo;
  EFI_PCI_IO_PROTOCOL    *PciIo;
  UINT64                 OriginalPciAttributes;
  VIRTIO_1_0_CONFIG      CommonConfig;           // Common settings
  VIRTIO_1_0_CONFIG      NotifyConfig;           // Notifications
  UINT32                 NotifyOffsetMultiplier;
  VIRTIO_1_0_CONFIG      SpecificConfig;         // Device specific settings
} VIRTIO_1_0_DEV;

#define VIRTIO_1_0_FROM_VIRTIO_DEVICE(Device) \
          CR (Device, VIRTIO_1_0_DEV, VirtIo, VIRTIO_1_0_SIGNATURE)

#endif // _VIRTIO_1_0_DXE_H_