3bb56c062e
This change implements the VIRTIO_DEVICE_PROTOCOL for the PCI transport layer. The VirtIo device drivers will interact with the PCI-based VirtIo devices through this protocol implementation. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin <olivier.martin@arm.com> v5: - updated comment block on VirtioPciDeviceRead() - return EFI_UNSUPPORTED instead of failed ASSERT() in VirtioPciSetPageSize() - VirtioPciIoRead(): restore the original requirement that FieldSize equal BufferSize exactly (not only divide it). The looping added in v4 did not match the comment block, and the only place that used it in v4 (ie. VirtioNetGetFeatures()) needs an open-coded loop anyway (will be done in a later part of v5). Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14964 6f19259b-4bc3-4df7-8a09-765794883524
167 lines
4.0 KiB
C
167 lines
4.0 KiB
C
/** @file
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Internal definitions for the VirtIo PCI 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_PCI_DEVICE_DXE_H_
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#define _VIRTIO_PCI_DEVICE_DXE_H_
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#include <Protocol/ComponentName.h>
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#include <Protocol/DriverBinding.h>
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#include <Protocol/PciIo.h>
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#include <Protocol/VirtioDevice.h>
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#include <IndustryStandard/Virtio.h>
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#define VIRTIO_PCI_DEVICE_SIGNATURE SIGNATURE_32 ('V', 'P', 'C', 'I')
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typedef struct {
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UINT32 Signature;
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VIRTIO_DEVICE_PROTOCOL VirtioDevice;
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EFI_PCI_IO_PROTOCOL *PciIo;
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UINT64 OriginalPciAttributes;
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UINT32 DeviceSpecificConfigurationOffset;
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} VIRTIO_PCI_DEVICE;
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#define VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE(Device) \
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CR (Device, VIRTIO_PCI_DEVICE, VirtioDevice, VIRTIO_PCI_DEVICE_SIGNATURE)
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EFI_STATUS
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EFIAPI
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VirtioPciIoRead (
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IN VIRTIO_PCI_DEVICE *Dev,
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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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VirtioPciIoWrite (
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IN VIRTIO_PCI_DEVICE *Dev,
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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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/********************************************
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* PCI Functions for VIRTIO_DEVICE_PROTOCOL
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*******************************************/
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EFI_STATUS
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EFIAPI
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VirtioPciDeviceRead (
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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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VirtioPciDeviceWrite (
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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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VirtioPciGetDeviceFeatures (
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IN VIRTIO_DEVICE_PROTOCOL *This,
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OUT UINT32 *DeviceFeatures
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);
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EFI_STATUS
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EFIAPI
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VirtioPciGetQueueAddress (
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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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VirtioPciGetQueueSize (
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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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VirtioPciSetQueueAlignment (
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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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VirtioPciSetPageSize (
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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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VirtioPciGetDeviceStatus (
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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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VirtioPciSetGuestFeatures (
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IN VIRTIO_DEVICE_PROTOCOL *This,
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IN UINT32 Features
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);
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EFI_STATUS
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EFIAPI
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VirtioPciSetQueueAddress (
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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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VirtioPciSetQueueSel (
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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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EFIAPI
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VirtioPciSetQueueNotify (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT16 Index
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);
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EFI_STATUS
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EFIAPI
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VirtioPciSetQueueSize (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT16 Size
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);
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EFI_STATUS
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EFIAPI
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VirtioPciSetDeviceStatus (
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VIRTIO_DEVICE_PROTOCOL *This,
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UINT8 DeviceStatus
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);
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#endif // _VIRTIO_PCI_DEVICE_DXE_H_
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