OvmfPkg: VIRTIO_DEVICE_PROTOCOL: widen the Features bitmap to 64 bits

[mirror_edk2.git] / OvmfPkg / Library / VirtioMmioDeviceLib / VirtioMmioDeviceFunctions.c

/** @file\r
\r
  This driver produces Virtio Device Protocol instances for Virtio MMIO devices.\r
\r
  Copyright (C) 2012, Red Hat, Inc.\r
  Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>\r
  Copyright (C) 2013, ARM Ltd.\r
\r
  This program and the accompanying materials are licensed and made available\r
  under the terms and conditions of the BSD License which accompanies this\r
  distribution. The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r
  WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include "VirtioMmioDevice.h"\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioGetDeviceFeatures (\r
  IN VIRTIO_DEVICE_PROTOCOL *This,\r
  OUT UINT64                *DeviceFeatures\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  if (DeviceFeatures == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  *DeviceFeatures = VIRTIO_CFG_READ (Device, VIRTIO_MMIO_OFFSET_HOST_FEATURES);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioGetQueueAddress (\r
  IN  VIRTIO_DEVICE_PROTOCOL *This,\r
  OUT UINT32                 *QueueAddress\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  if (QueueAddress == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  *QueueAddress = VIRTIO_CFG_READ (Device, VIRTIO_MMIO_OFFSET_QUEUE_PFN);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioGetQueueSize (\r
  IN  VIRTIO_DEVICE_PROTOCOL  *This,\r
  OUT UINT16                  *QueueNumMax\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  if (QueueNumMax == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  *QueueNumMax = VIRTIO_CFG_READ (Device, VIRTIO_MMIO_OFFSET_QUEUE_NUM_MAX) & 0xFFFF;\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioGetDeviceStatus (\r
  IN  VIRTIO_DEVICE_PROTOCOL  *This,\r
  OUT UINT8                   *DeviceStatus\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  if (DeviceStatus == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  *DeviceStatus = VIRTIO_CFG_READ (Device, VIRTIO_MMIO_OFFSET_STATUS) & 0xFF;\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioSetQueueSize (\r
  VIRTIO_DEVICE_PROTOCOL *This,\r
  UINT16                  QueueSize\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_QUEUE_NUM, QueueSize);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioSetDeviceStatus (\r
  VIRTIO_DEVICE_PROTOCOL *This,\r
  UINT8                   DeviceStatus\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_STATUS, DeviceStatus);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioSetQueueNotify (\r
  VIRTIO_DEVICE_PROTOCOL *This,\r
  UINT16                  QueueNotify\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_QUEUE_NOTIFY, QueueNotify);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioSetQueueAlignment (\r
  VIRTIO_DEVICE_PROTOCOL *This,\r
  UINT32                  Alignment\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_QUEUE_ALIGN, Alignment);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioSetPageSize (\r
  VIRTIO_DEVICE_PROTOCOL *This,\r
  UINT32                  PageSize\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  if (PageSize != EFI_PAGE_SIZE) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_GUEST_PAGE_SIZE, PageSize);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioSetQueueSel (\r
  VIRTIO_DEVICE_PROTOCOL *This,\r
  UINT16                  Sel\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_QUEUE_SEL, Sel);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
VirtioMmioSetQueueAddress (\r
  VIRTIO_DEVICE_PROTOCOL *This,\r
  UINT32                  Address\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_QUEUE_PFN, Address);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioSetGuestFeatures (\r
  VIRTIO_DEVICE_PROTOCOL *This,\r
  UINT64                  Features\r
  )\r
{\r
  VIRTIO_MMIO_DEVICE *Device;\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  if (Features > MAX_UINT32) {\r
    return EFI_UNSUPPORTED;\r
  }\r
  VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_GUEST_FEATURES,\r
    (UINT32)Features);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioDeviceWrite (\r
  IN VIRTIO_DEVICE_PROTOCOL *This,\r
  IN UINTN                  FieldOffset,\r
  IN UINTN                  FieldSize,\r
  IN UINT64                 Value\r
  )\r
{\r
  UINTN                     DstBaseAddress;\r
  VIRTIO_MMIO_DEVICE       *Device;\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  //\r
  // Double-check fieldsize\r
  //\r
  if ((FieldSize != 1) && (FieldSize != 2) &&\r
      (FieldSize != 4) && (FieldSize != 8)) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  //\r
  // Compute base address\r
  //\r
  DstBaseAddress = Device->BaseAddress +\r
      VIRTIO_DEVICE_SPECIFIC_CONFIGURATION_OFFSET_MMIO + FieldOffset;\r
\r
  //\r
  // The device-specific memory area of Virtio-MMIO can only be written in\r
  // byte accesses. This is not currently in the Virtio spec.\r
  //\r
  MmioWriteBuffer8 (DstBaseAddress, FieldSize, (UINT8*)&Value);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioMmioDeviceRead (\r
  IN  VIRTIO_DEVICE_PROTOCOL    *This,\r
  IN  UINTN                     FieldOffset,\r
  IN  UINTN                     FieldSize,\r
  IN  UINTN                     BufferSize,\r
  OUT VOID                      *Buffer\r
  )\r
{\r
  UINTN                     SrcBaseAddress;\r
  VIRTIO_MMIO_DEVICE       *Device;\r
\r
  Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  //\r
  // Parameter validation\r
  //\r
  ASSERT (FieldSize == BufferSize);\r
\r
  //\r
  // Double-check fieldsize\r
  //\r
  if ((FieldSize != 1) && (FieldSize != 2) &&\r
      (FieldSize != 4) && (FieldSize != 8)) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  //\r
  // Compute base address\r
  //\r
  SrcBaseAddress = Device->BaseAddress +\r
      VIRTIO_DEVICE_SPECIFIC_CONFIGURATION_OFFSET_MMIO + FieldOffset;\r
\r
  //\r
  // The device-specific memory area of Virtio-MMIO can only be read in\r
  // byte reads. This is not currently in the Virtio spec.\r
  //\r
  MmioReadBuffer8 (SrcBaseAddress, BufferSize, Buffer);\r
\r
  return EFI_SUCCESS;\r
}\r