OvmfPkg/Include/IndustryStandard/Virtio10.h

   1 /** @file
   2   Definitions from the VirtIo 1.0 specification (csprd05).
   3
   4   Copyright (C) 2016, Red Hat, Inc.
   5
   6   This program and the accompanying materials are licensed and made available
   7   under the terms and conditions of the BSD License which accompanies this
   8   distribution. The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
  12   WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 **/
  14
  15 #ifndef _VIRTIO_1_0_H_
  16 #define _VIRTIO_1_0_H_
  17
  18 #include <IndustryStandard/Virtio095.h>
  19
  20 //
  21 // Structures for parsing the VirtIo 1.0 specific PCI capabilities from the
  22 // config space
  23 //
  24 #pragma pack (1)
  25 typedef struct {
  26   UINT8 CapId;   // Capability identifier (generic)
  27   UINT8 CapNext; // Link to next capability (generic)
  28 } VIRTIO_PCI_CAP_LINK;
  29
  30 typedef struct {
  31   UINT8  ConfigType; // Identifies the specific VirtIo 1.0 config structure
  32   UINT8  Bar;        // The BAR that contains the structure
  33   UINT8  Padding[3];
  34   UINT32 Offset;     // Offset within Bar until the start of the structure
  35   UINT32 Length;     // Length of the structure
  36 } VIRTIO_PCI_CAP;
  37 #pragma pack ()
  38
  39 //
  40 // Values for the VIRTIO_PCI_CAP.ConfigType field
  41 //
  42 #define VIRTIO_PCI_CAP_COMMON_CFG 1 // Common configuration
  43 #define VIRTIO_PCI_CAP_NOTIFY_CFG 2 // Notifications
  44 #define VIRTIO_PCI_CAP_DEVICE_CFG 4 // Device specific configuration
  45
  46 //
  47 // Structure pointed-to by Bar and Offset in VIRTIO_PCI_CAP when ConfigType is
  48 // VIRTIO_PCI_CAP_COMMON_CFG
  49 //
  50 #pragma pack (1)
  51 typedef struct {
  52   UINT32 DeviceFeatureSelect;
  53   UINT32 DeviceFeature;
  54   UINT32 DriverFeatureSelect;
  55   UINT32 DriverFeature;
  56   UINT16 MsixConfig;
  57   UINT16 NumQueues;
  58   UINT8  DeviceStatus;
  59   UINT8  ConfigGeneration;
  60   UINT16 QueueSelect;
  61   UINT16 QueueSize;
  62   UINT16 QueueMsixVector;
  63   UINT16 QueueEnable;
  64   UINT16 QueueNotifyOff;
  65   UINT64 QueueDesc;
  66   UINT64 QueueAvail;
  67   UINT64 QueueUsed;
  68 } VIRTIO_PCI_COMMON_CFG;
  69 #pragma pack ()
  70
  71 //
  72 // VirtIo 1.0 device status bits
  73 //
  74 #define VSTAT_FEATURES_OK BIT3
  75
  76 //
  77 // VirtIo 1.0 reserved (device-independent) feature bits
  78 //
  79 #define VIRTIO_F_VERSION_1 BIT32
  80
  81 #endif // _VIRTIO_1_0_H_