mirror of https://github.com/acidanthera/audk.git
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/** @file
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Definitions from the VirtIo 1.0 specification (csprd05).
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Copyright (C) 2016, Red Hat, Inc.
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Copyright (C) 2017, AMD, Inc.
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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_1_0_H_
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#define _VIRTIO_1_0_H_
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#include <IndustryStandard/Virtio095.h>
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//
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// Subsystem Device IDs (to be) introduced in VirtIo 1.0
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//
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#define VIRTIO_SUBSYSTEM_GPU_DEVICE 16
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//
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// Structures for parsing the VirtIo 1.0 specific PCI capabilities from the
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// config space
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//
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#pragma pack (1)
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typedef struct {
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UINT8 CapId; // Capability identifier (generic)
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UINT8 CapNext; // Link to next capability (generic)
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} VIRTIO_PCI_CAP_LINK;
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typedef struct {
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UINT8 ConfigType; // Identifies the specific VirtIo 1.0 config structure
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UINT8 Bar; // The BAR that contains the structure
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UINT8 Padding[3];
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UINT32 Offset; // Offset within Bar until the start of the structure
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UINT32 Length; // Length of the structure
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} VIRTIO_PCI_CAP;
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#pragma pack ()
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//
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// Values for the VIRTIO_PCI_CAP.ConfigType field
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//
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#define VIRTIO_PCI_CAP_COMMON_CFG 1 // Common configuration
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#define VIRTIO_PCI_CAP_NOTIFY_CFG 2 // Notifications
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#define VIRTIO_PCI_CAP_DEVICE_CFG 4 // Device specific configuration
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//
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// Structure pointed-to by Bar and Offset in VIRTIO_PCI_CAP when ConfigType is
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// VIRTIO_PCI_CAP_COMMON_CFG
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//
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#pragma pack (1)
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typedef struct {
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UINT32 DeviceFeatureSelect;
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UINT32 DeviceFeature;
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UINT32 DriverFeatureSelect;
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UINT32 DriverFeature;
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UINT16 MsixConfig;
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UINT16 NumQueues;
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UINT8 DeviceStatus;
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UINT8 ConfigGeneration;
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UINT16 QueueSelect;
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UINT16 QueueSize;
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UINT16 QueueMsixVector;
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UINT16 QueueEnable;
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UINT16 QueueNotifyOff;
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UINT64 QueueDesc;
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UINT64 QueueAvail;
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UINT64 QueueUsed;
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} VIRTIO_PCI_COMMON_CFG;
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#pragma pack ()
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//
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// VirtIo 1.0 device status bits
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//
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#define VSTAT_FEATURES_OK BIT3
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//
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// VirtIo 1.0 reserved (device-independent) feature bits
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//
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#define VIRTIO_F_VERSION_1 BIT32
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#define VIRTIO_F_IOMMU_PLATFORM BIT33
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#endif // _VIRTIO_1_0_H_
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