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/** @file
Definitions from the VirtIo 1.0 specification (csprd05).
Copyright (C) 2016, Red Hat, Inc.
Copyright (C) 2017, AMD, Inc.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _VIRTIO_1_0_H_
#define _VIRTIO_1_0_H_
#include <IndustryStandard/Pci23.h>
#include <IndustryStandard/Virtio095.h>
//
// Subsystem Device IDs (to be) introduced in VirtIo 1.0
//
#define VIRTIO_SUBSYSTEM_GPU_DEVICE 16
//
// Subsystem Device IDs from the VirtIo spec at git commit 87fa6b5d8155;
// <https://github.com/oasis-tcs/virtio-spec/tree/87fa6b5d8155>.
//
#define VIRTIO_SUBSYSTEM_FILESYSTEM 26
//
// Structures for parsing the VirtIo 1.0 specific PCI capabilities from the
// config space
//
#pragma pack (1)
typedef struct {
EFI_PCI_CAPABILITY_VENDOR_HDR VendorHdr;
UINT8 ConfigType; // Identifies the specific VirtIo 1.0 config structure
UINT8 Bar; // The BAR that contains the structure
UINT8 Padding[3];
UINT32 Offset; // Offset within Bar until the start of the structure
UINT32 Length; // Length of the structure
} VIRTIO_PCI_CAP;
#pragma pack ()
//
// Values for the VIRTIO_PCI_CAP.ConfigType field
//
#define VIRTIO_PCI_CAP_COMMON_CFG 1 // Common configuration
#define VIRTIO_PCI_CAP_NOTIFY_CFG 2 // Notifications
#define VIRTIO_PCI_CAP_DEVICE_CFG 4 // Device specific configuration
//
// Structure pointed-to by Bar and Offset in VIRTIO_PCI_CAP when ConfigType is
// VIRTIO_PCI_CAP_COMMON_CFG
//
#pragma pack (1)
typedef struct {
UINT32 DeviceFeatureSelect;
UINT32 DeviceFeature;
UINT32 DriverFeatureSelect;
UINT32 DriverFeature;
UINT16 MsixConfig;
UINT16 NumQueues;
UINT8 DeviceStatus;
UINT8 ConfigGeneration;
UINT16 QueueSelect;
UINT16 QueueSize;
UINT16 QueueMsixVector;
UINT16 QueueEnable;
UINT16 QueueNotifyOff;
UINT64 QueueDesc;
UINT64 QueueAvail;
UINT64 QueueUsed;
} VIRTIO_PCI_COMMON_CFG;
#pragma pack ()
//
// VirtIo 1.0 device status bits
//
#define VSTAT_FEATURES_OK BIT3
//
// VirtIo 1.0 reserved (device-independent) feature bits
//
#define VIRTIO_F_VERSION_1 BIT32
#define VIRTIO_F_IOMMU_PLATFORM BIT33
//
// MMIO VirtIo Header Offsets
//
#define VIRTIO_MMIO_OFFSET_QUEUE_READY 0x44
#define VIRTIO_MMIO_OFFSET_QUEUE_DESC_LO 0x80
#define VIRTIO_MMIO_OFFSET_QUEUE_DESC_HI 0x84
#define VIRTIO_MMIO_OFFSET_QUEUE_AVAIL_LO 0x90
#define VIRTIO_MMIO_OFFSET_QUEUE_AVAIL_HI 0x94
#define VIRTIO_MMIO_OFFSET_QUEUE_USED_LO 0xa0
#define VIRTIO_MMIO_OFFSET_QUEUE_USED_HI 0xa4
#define VIRTIO_MMIO_OFFSET_CONFIG_GENERATION 0xfc
#endif // _VIRTIO_1_0_H_
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