OvmfPkg/Virtio10Dxe: implement IOMMU-like member functions

[mirror_edk2.git] / OvmfPkg / VirtioPciDeviceDxe / VirtioPciFunctions.c

/** @file\r
\r
  This driver produces Virtio Device Protocol instances for Virtio PCI 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
#include <Library/BaseMemoryLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiLib.h>\r
#include "VirtioPciDevice.h"\r
\r
/**\r
\r
  Read a word from Region 0 of the device specified by VirtIo Device protocol.\r
\r
  The function implements the ReadDevice protocol member of\r
  VIRTIO_DEVICE_PROTOCOL.\r
\r
  @param[in] This         VirtIo Device protocol.\r
\r
  @param[in] FieldOffset  Source offset.\r
\r
  @param[in] FieldSize    Source field size, must be in { 1, 2, 4, 8 }.\r
\r
  @param[in] BufferSize   Number of bytes available in the target buffer. Must\r
                          equal FieldSize.\r
\r
  @param[out] Buffer      Target buffer.\r
\r
\r
  @return  Status code returned by PciIo->Io.Read().\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
VirtioPciDeviceRead (\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
  VIRTIO_PCI_DEVICE         *Dev;\r
\r
  Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  return VirtioPciIoRead (Dev,\r
      Dev->DeviceSpecificConfigurationOffset + FieldOffset,\r
      FieldSize, BufferSize, Buffer);\r
}\r
\r
/**\r
\r
  Write a word into Region 0 of the device specified by VirtIo Device protocol.\r
\r
  @param[in] This         VirtIo Device protocol.\r
\r
  @param[in] FieldOffset  Destination offset.\r
\r
  @param[in] FieldSize    Destination field size, must be in { 1, 2, 4, 8 }.\r
\r
  @param[in] Value        Little endian value to write, converted to UINT64.\r
                          The least significant FieldSize bytes will be used.\r
\r
\r
  @return  Status code returned by PciIo->Io.Write().\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
VirtioPciDeviceWrite (\r
  IN VIRTIO_DEVICE_PROTOCOL *This,\r
  IN UINTN                  FieldOffset,\r
  IN UINTN                  FieldSize,\r
  IN UINT64                 Value\r
  )\r
{\r
  VIRTIO_PCI_DEVICE         *Dev;\r
\r
  Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  return VirtioPciIoWrite (Dev,\r
      Dev->DeviceSpecificConfigurationOffset + FieldOffset, FieldSize, Value);\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciGetDeviceFeatures (\r
  IN VIRTIO_DEVICE_PROTOCOL *This,\r
  OUT UINT64                *DeviceFeatures\r
  )\r
{\r
  VIRTIO_PCI_DEVICE         *Dev;\r
  EFI_STATUS                Status;\r
  UINT32                    Features32;\r
\r
  if (DeviceFeatures == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  Status = VirtioPciIoRead (Dev, VIRTIO_PCI_OFFSET_DEVICE_FEATURES,\r
             sizeof (UINT32), sizeof (UINT32), &Features32);\r
  if (!EFI_ERROR (Status)) {\r
    *DeviceFeatures = Features32;\r
  }\r
  return Status;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciGetQueueSize (\r
  IN  VIRTIO_DEVICE_PROTOCOL  *This,\r
  OUT UINT16                  *QueueNumMax\r
  )\r
{\r
  VIRTIO_PCI_DEVICE         *Dev;\r
\r
  if (QueueNumMax == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  return VirtioPciIoRead (Dev, VIRTIO_PCI_OFFSET_QUEUE_SIZE, sizeof (UINT16),\r
      sizeof (UINT16), QueueNumMax);\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciGetDeviceStatus (\r
  IN  VIRTIO_DEVICE_PROTOCOL  *This,\r
  OUT UINT8                   *DeviceStatus\r
  )\r
{\r
  VIRTIO_PCI_DEVICE         *Dev;\r
\r
  if (DeviceStatus == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  return VirtioPciIoRead (Dev, VIRTIO_PCI_OFFSET_QUEUE_DEVICE_STATUS,\r
      sizeof (UINT8), sizeof (UINT8), DeviceStatus);\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciSetGuestFeatures (\r
  IN VIRTIO_DEVICE_PROTOCOL  *This,\r
  IN UINT64                   Features\r
  )\r
{\r
  VIRTIO_PCI_DEVICE *Dev;\r
\r
  Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  if (Features > MAX_UINT32) {\r
    return EFI_UNSUPPORTED;\r
  }\r
  return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_GUEST_FEATURES,\r
      sizeof (UINT32), Features);\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciSetQueueAddress (\r
  IN VIRTIO_DEVICE_PROTOCOL  *This,\r
  IN VRING                   *Ring\r
  )\r
{\r
  VIRTIO_PCI_DEVICE *Dev;\r
\r
  Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_ADDRESS, sizeof (UINT32),\r
      (UINT32)((UINTN)Ring->Base >> EFI_PAGE_SHIFT));\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciSetQueueSel (\r
  IN  VIRTIO_DEVICE_PROTOCOL    *This,\r
  IN  UINT16                    Sel\r
  )\r
{\r
  VIRTIO_PCI_DEVICE *Dev;\r
\r
  Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_SELECT, sizeof (UINT16),\r
      Sel);\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciSetQueueAlignment (\r
  IN  VIRTIO_DEVICE_PROTOCOL *This,\r
  IN  UINT32                  Alignment\r
  )\r
{\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciSetPageSize (\r
  IN  VIRTIO_DEVICE_PROTOCOL *This,\r
  IN  UINT32                  PageSize\r
  )\r
{\r
  return (PageSize == EFI_PAGE_SIZE) ? EFI_SUCCESS : EFI_UNSUPPORTED;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciSetQueueNotify (\r
  IN  VIRTIO_DEVICE_PROTOCOL *This,\r
  IN  UINT16                 Index\r
  )\r
{\r
  VIRTIO_PCI_DEVICE *Dev;\r
\r
  Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_NOTIFY, sizeof (UINT16),\r
      Index);\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciSetQueueSize (\r
  IN  VIRTIO_DEVICE_PROTOCOL *This,\r
  IN  UINT16                 Size\r
  )\r
{\r
  //\r
  // This function is only applicable in Virtio-MMIO.\r
  // (The QueueSize field is read-only in Virtio proper (PCI))\r
  //\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
VirtioPciSetDeviceStatus (\r
  IN  VIRTIO_DEVICE_PROTOCOL *This,\r
  IN  UINT8                  DeviceStatus\r
  )\r
{\r
  VIRTIO_PCI_DEVICE *Dev;\r
\r
  Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r
\r
  return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_DEVICE_STATUS,\r
      sizeof (UINT8), DeviceStatus);\r
}\r