diff options
Diffstat (limited to 'OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c')
| -rw-r--r-- | OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c new file mode 100644 index 0000000000..9c40fd94a6 --- /dev/null +++ b/OvmfPkg/VirtioPciDeviceDxe/VirtioPciFunctions.c @@ -0,0 +1,283 @@ +/** @file
+
+ This driver produces Virtio Device Protocol instances for Virtio PCI devices.
+
+ Copyright (C) 2012, Red Hat, Inc.
+ Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
+ Copyright (C) 2013, ARM Ltd.
+
+ 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.
+
+**/
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+#include "VirtioPciDevice.h"
+
+/**
+
+ Read a word from Region 0 of the device specified by VirtIo Device protocol.
+
+ The function implements the ReadDevice protocol member of
+ VIRTIO_DEVICE_PROTOCOL.
+
+ @param[in] This VirtIo Device protocol.
+
+ @param[in] FieldOffset Source offset.
+
+ @param[in] FieldSize Source field size, must be in { 1, 2, 4, 8 }.
+
+ @param[in] BufferSize Number of bytes available in the target buffer. Must
+ equal FieldSize.
+
+ @param[out] Buffer Target buffer.
+
+
+ @return Status code returned by PciIo->Io.Read().
+
+**/
+EFI_STATUS
+EFIAPI
+VirtioPciDeviceRead (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN FieldOffset,
+ IN UINTN FieldSize,
+ IN UINTN BufferSize,
+ OUT VOID *Buffer
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoRead (Dev,
+ Dev->DeviceSpecificConfigurationOffset + FieldOffset,
+ FieldSize, BufferSize, Buffer);
+}
+
+/**
+
+ Write a word into Region 0 of the device specified by VirtIo Device protocol.
+
+ @param[in] This VirtIo Device protocol.
+
+ @param[in] FieldOffset Destination offset.
+
+ @param[in] FieldSize Destination field size, must be in { 1, 2, 4, 8 }.
+
+ @param[in] Value Little endian value to write, converted to UINT64.
+ The least significant FieldSize bytes will be used.
+
+
+ @return Status code returned by PciIo->Io.Write().
+
+**/
+EFI_STATUS
+EFIAPI
+VirtioPciDeviceWrite (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN FieldOffset,
+ IN UINTN FieldSize,
+ IN UINT64 Value
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoWrite (Dev,
+ Dev->DeviceSpecificConfigurationOffset + FieldOffset, FieldSize, Value);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciGetDeviceFeatures (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ OUT UINT32 *DeviceFeatures
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ if (DeviceFeatures == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoRead (Dev, VIRTIO_PCI_OFFSET_DEVICE_FEATURES, sizeof (UINT32),
+ sizeof (UINT32), DeviceFeatures);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciGetQueueAddress (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ OUT UINT32 *QueueAddress
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ if (QueueAddress == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoRead (Dev, VIRTIO_PCI_OFFSET_QUEUE_ADDRESS, sizeof (UINT32),
+ sizeof (UINT32), QueueAddress);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciGetQueueSize (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ OUT UINT16 *QueueNumMax
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ if (QueueNumMax == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoRead (Dev, VIRTIO_PCI_OFFSET_QUEUE_SIZE, sizeof (UINT16),
+ sizeof (UINT16), QueueNumMax);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciGetDeviceStatus (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ OUT UINT8 *DeviceStatus
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ if (DeviceStatus == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoRead (Dev, VIRTIO_PCI_OFFSET_QUEUE_DEVICE_STATUS,
+ sizeof (UINT8), sizeof (UINT8), DeviceStatus);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciSetGuestFeatures (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINT32 Features
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_GUEST_FEATURES,
+ sizeof (UINT32), Features);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciSetQueueAddress (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT32 Address
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_ADDRESS, sizeof (UINT32),
+ Address);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciSetQueueSel (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT16 Sel
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_SELECT, sizeof (UINT16),
+ Sel);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciSetQueueAlignment (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT32 Alignment
+ )
+{
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciSetPageSize (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT32 PageSize
+ )
+{
+ return (PageSize == EFI_PAGE_SIZE) ? EFI_SUCCESS : EFI_UNSUPPORTED;
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciSetQueueNotify (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT16 Index
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_NOTIFY, sizeof (UINT16),
+ Index);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciSetQueueSize (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT16 Size
+ )
+{
+ //
+ // This function is only applicable in Virtio-MMIO.
+ // (The QueueSize field is read-only in Virtio proper (PCI))
+ //
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+VirtioPciSetDeviceStatus (
+ VIRTIO_DEVICE_PROTOCOL *This,
+ UINT8 DeviceStatus
+ )
+{
+ VIRTIO_PCI_DEVICE *Dev;
+
+ Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);
+
+ return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_DEVICE_STATUS,
+ sizeof (UINT8), DeviceStatus);
+}
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