hw/virtio/virtio-pci.h

   1 /*
   2  * Virtio PCI Bindings
   3  *
   4  * Copyright IBM, Corp. 2007
   5  * Copyright (c) 2009 CodeSourcery
   6  *
   7  * Authors:
   8  *  Anthony Liguori   <aliguori@us.ibm.com>
   9  *  Paul Brook        <paul@codesourcery.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2.  See
  12  * the COPYING file in the top-level directory.
  13  */
  14
  15 #ifndef QEMU_VIRTIO_PCI_H
  16 #define QEMU_VIRTIO_PCI_H
  17
  18 #include "hw/pci/msi.h"
  19 #include "hw/virtio/virtio-blk.h"
  20 #include "hw/virtio/virtio-net.h"
  21 #include "hw/virtio/virtio-rng.h"
  22 #include "hw/virtio/virtio-serial.h"
  23 #include "hw/virtio/virtio-scsi.h"
  24 #include "hw/virtio/virtio-balloon.h"
  25 #include "hw/virtio/virtio-bus.h"
  26 #include "hw/virtio/virtio-gpu.h"
  27 #include "hw/virtio/virtio-crypto.h"
  28 #include "hw/virtio/vhost-user-scsi.h"
  29 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
  30 #include "hw/virtio/vhost-user-blk.h"
  31 #endif
  32
  33 #ifdef CONFIG_VIRTFS
  34 #include "hw/9pfs/virtio-9p.h"
  35 #endif
  36 #ifdef CONFIG_VHOST_SCSI
  37 #include "hw/virtio/vhost-scsi.h"
  38 #endif
  39
  40 typedef struct VirtIOPCIProxy VirtIOPCIProxy;
  41 typedef struct VirtIOBlkPCI VirtIOBlkPCI;
  42 typedef struct VirtIOSCSIPCI VirtIOSCSIPCI;
  43 typedef struct VirtIOBalloonPCI VirtIOBalloonPCI;
  44 typedef struct VirtIOSerialPCI VirtIOSerialPCI;
  45 typedef struct VirtIONetPCI VirtIONetPCI;
  46 typedef struct VHostSCSIPCI VHostSCSIPCI;
  47 typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
  48 typedef struct VHostUserBlkPCI VHostUserBlkPCI;
  49 typedef struct VirtIORngPCI VirtIORngPCI;
  50 typedef struct VirtIOGPUPCI VirtIOGPUPCI;
  51 typedef struct VirtIOCryptoPCI VirtIOCryptoPCI;
  52
  53 /* virtio-pci-bus */
  54
  55 typedef struct VirtioBusState VirtioPCIBusState;
  56 typedef struct VirtioBusClass VirtioPCIBusClass;
  57
  58 #define TYPE_VIRTIO_PCI_BUS "virtio-pci-bus"
  59 #define VIRTIO_PCI_BUS(obj) \
  60         OBJECT_CHECK(VirtioPCIBusState, (obj), TYPE_VIRTIO_PCI_BUS)
  61 #define VIRTIO_PCI_BUS_GET_CLASS(obj) \
  62         OBJECT_GET_CLASS(VirtioPCIBusClass, obj, TYPE_VIRTIO_PCI_BUS)
  63 #define VIRTIO_PCI_BUS_CLASS(klass) \
  64         OBJECT_CLASS_CHECK(VirtioPCIBusClass, klass, TYPE_VIRTIO_PCI_BUS)
  65
  66 enum {
  67     VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT,
  68     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT,
  69     VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT,
  70     VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT,
  71     VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT,
  72     VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT,
  73     VIRTIO_PCI_FLAG_ATS_BIT,
  74     VIRTIO_PCI_FLAG_INIT_DEVERR_BIT,
  75     VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT,
  76     VIRTIO_PCI_FLAG_INIT_PM_BIT,
  77 };
  78
  79 /* Need to activate work-arounds for buggy guests at vmstate load. */
  80 #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION \
  81     (1 << VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT)
  82
  83 /* Performance improves when virtqueue kick processing is decoupled from the
  84  * vcpu thread using ioeventfd for some devices. */
  85 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD   (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
  86
  87 /* virtio version flags */
  88 #define VIRTIO_PCI_FLAG_DISABLE_PCIE (1 << VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT)
  89
  90 /* migrate extra state */
  91 #define VIRTIO_PCI_FLAG_MIGRATE_EXTRA (1 << VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT)
  92
  93 /* have pio notification for modern device ? */
  94 #define VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY \
  95     (1 << VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT)
  96
  97 /* page per vq flag to be used by split drivers within guests */
  98 #define VIRTIO_PCI_FLAG_PAGE_PER_VQ \
  99     (1 << VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT)
 100
 101 /* address space translation service */
 102 #define VIRTIO_PCI_FLAG_ATS (1 << VIRTIO_PCI_FLAG_ATS_BIT)
 103
 104 /* Init error enabling flags */
 105 #define VIRTIO_PCI_FLAG_INIT_DEVERR (1 << VIRTIO_PCI_FLAG_INIT_DEVERR_BIT)
 106
 107 /* Init Link Control register */
 108 #define VIRTIO_PCI_FLAG_INIT_LNKCTL (1 << VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT)
 109
 110 /* Init Power Management */
 111 #define VIRTIO_PCI_FLAG_INIT_PM (1 << VIRTIO_PCI_FLAG_INIT_PM_BIT)
 112
 113 typedef struct {
 114     MSIMessage msg;
 115     int virq;
 116     unsigned int users;
 117 } VirtIOIRQFD;
 118
 119 /*
 120  * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
 121  */
 122 #define TYPE_VIRTIO_PCI "virtio-pci"
 123 #define VIRTIO_PCI_GET_CLASS(obj) \
 124         OBJECT_GET_CLASS(VirtioPCIClass, obj, TYPE_VIRTIO_PCI)
 125 #define VIRTIO_PCI_CLASS(klass) \
 126         OBJECT_CLASS_CHECK(VirtioPCIClass, klass, TYPE_VIRTIO_PCI)
 127 #define VIRTIO_PCI(obj) \
 128         OBJECT_CHECK(VirtIOPCIProxy, (obj), TYPE_VIRTIO_PCI)
 129
 130 typedef struct VirtioPCIClass {
 131     PCIDeviceClass parent_class;
 132     DeviceRealize parent_dc_realize;
 133     void (*realize)(VirtIOPCIProxy *vpci_dev, Error **errp);
 134 } VirtioPCIClass;
 135
 136 typedef struct VirtIOPCIRegion {
 137     MemoryRegion mr;
 138     uint32_t offset;
 139     uint32_t size;
 140     uint32_t type;
 141 } VirtIOPCIRegion;
 142
 143 typedef struct VirtIOPCIQueue {
 144   uint16_t num;
 145   bool enabled;
 146   uint32_t desc[2];
 147   uint32_t avail[2];
 148   uint32_t used[2];
 149 } VirtIOPCIQueue;
 150
 151 struct VirtIOPCIProxy {
 152     PCIDevice pci_dev;
 153     MemoryRegion bar;
 154     union {
 155         struct {
 156             VirtIOPCIRegion common;
 157             VirtIOPCIRegion isr;
 158             VirtIOPCIRegion device;
 159             VirtIOPCIRegion notify;
 160             VirtIOPCIRegion notify_pio;
 161         };
 162         VirtIOPCIRegion regs[5];
 163     };
 164     MemoryRegion modern_bar;
 165     MemoryRegion io_bar;
 166     uint32_t legacy_io_bar_idx;
 167     uint32_t msix_bar_idx;
 168     uint32_t modern_io_bar_idx;
 169     uint32_t modern_mem_bar_idx;
 170     int config_cap;
 171     uint32_t flags;
 172     bool disable_modern;
 173     bool ignore_backend_features;
 174     OnOffAuto disable_legacy;
 175     uint32_t class_code;
 176     uint32_t nvectors;
 177     uint32_t dfselect;
 178     uint32_t gfselect;
 179     uint32_t guest_features[2];
 180     VirtIOPCIQueue vqs[VIRTIO_QUEUE_MAX];
 181
 182     VirtIOIRQFD *vector_irqfd;
 183     int nvqs_with_notifiers;
 184     VirtioBusState bus;
 185 };
 186
 187 static inline bool virtio_pci_modern(VirtIOPCIProxy *proxy)
 188 {
 189     return !proxy->disable_modern;
 190 }
 191
 192 static inline bool virtio_pci_legacy(VirtIOPCIProxy *proxy)
 193 {
 194     return proxy->disable_legacy == ON_OFF_AUTO_OFF;
 195 }
 196
 197 static inline void virtio_pci_force_virtio_1(VirtIOPCIProxy *proxy)
 198 {
 199     proxy->disable_modern = false;
 200     proxy->disable_legacy = ON_OFF_AUTO_ON;
 201 }
 202
 203 static inline void virtio_pci_disable_modern(VirtIOPCIProxy *proxy)
 204 {
 205     proxy->disable_modern = true;
 206 }
 207
 208 /*
 209  * virtio-scsi-pci: This extends VirtioPCIProxy.
 210  */
 211 #define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci-base"
 212 #define VIRTIO_SCSI_PCI(obj) \
 213         OBJECT_CHECK(VirtIOSCSIPCI, (obj), TYPE_VIRTIO_SCSI_PCI)
 214
 215 struct VirtIOSCSIPCI {
 216     VirtIOPCIProxy parent_obj;
 217     VirtIOSCSI vdev;
 218 };
 219
 220 #ifdef CONFIG_VHOST_SCSI
 221 /*
 222  * vhost-scsi-pci: This extends VirtioPCIProxy.
 223  */
 224 #define TYPE_VHOST_SCSI_PCI "vhost-scsi-pci-base"
 225 #define VHOST_SCSI_PCI(obj) \
 226         OBJECT_CHECK(VHostSCSIPCI, (obj), TYPE_VHOST_SCSI_PCI)
 227
 228 struct VHostSCSIPCI {
 229     VirtIOPCIProxy parent_obj;
 230     VHostSCSI vdev;
 231 };
 232 #endif
 233
 234 #define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci-base"
 235 #define VHOST_USER_SCSI_PCI(obj) \
 236         OBJECT_CHECK(VHostUserSCSIPCI, (obj), TYPE_VHOST_USER_SCSI_PCI)
 237
 238 struct VHostUserSCSIPCI {
 239     VirtIOPCIProxy parent_obj;
 240     VHostUserSCSI vdev;
 241 };
 242
 243 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
 244 /*
 245  * vhost-user-blk-pci: This extends VirtioPCIProxy.
 246  */
 247 #define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base"
 248 #define VHOST_USER_BLK_PCI(obj) \
 249         OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI)
 250
 251 struct VHostUserBlkPCI {
 252     VirtIOPCIProxy parent_obj;
 253     VHostUserBlk vdev;
 254 };
 255 #endif
 256
 257 /*
 258  * virtio-blk-pci: This extends VirtioPCIProxy.
 259  */
 260 #define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci-base"
 261 #define VIRTIO_BLK_PCI(obj) \
 262         OBJECT_CHECK(VirtIOBlkPCI, (obj), TYPE_VIRTIO_BLK_PCI)
 263
 264 struct VirtIOBlkPCI {
 265     VirtIOPCIProxy parent_obj;
 266     VirtIOBlock vdev;
 267 };
 268
 269 /*
 270  * virtio-balloon-pci: This extends VirtioPCIProxy.
 271  */
 272 #define TYPE_VIRTIO_BALLOON_PCI "virtio-balloon-pci-base"
 273 #define VIRTIO_BALLOON_PCI(obj) \
 274         OBJECT_CHECK(VirtIOBalloonPCI, (obj), TYPE_VIRTIO_BALLOON_PCI)
 275
 276 struct VirtIOBalloonPCI {
 277     VirtIOPCIProxy parent_obj;
 278     VirtIOBalloon vdev;
 279 };
 280
 281 /*
 282  * virtio-serial-pci: This extends VirtioPCIProxy.
 283  */
 284 #define TYPE_VIRTIO_SERIAL_PCI "virtio-serial-pci-base"
 285 #define VIRTIO_SERIAL_PCI(obj) \
 286         OBJECT_CHECK(VirtIOSerialPCI, (obj), TYPE_VIRTIO_SERIAL_PCI)
 287
 288 struct VirtIOSerialPCI {
 289     VirtIOPCIProxy parent_obj;
 290     VirtIOSerial vdev;
 291 };
 292
 293 /*
 294  * virtio-net-pci: This extends VirtioPCIProxy.
 295  */
 296 #define TYPE_VIRTIO_NET_PCI "virtio-net-pci-base"
 297 #define VIRTIO_NET_PCI(obj) \
 298         OBJECT_CHECK(VirtIONetPCI, (obj), TYPE_VIRTIO_NET_PCI)
 299
 300 struct VirtIONetPCI {
 301     VirtIOPCIProxy parent_obj;
 302     VirtIONet vdev;
 303 };
 304
 305 /*
 306  * virtio-9p-pci: This extends VirtioPCIProxy.
 307  */
 308
 309 #ifdef CONFIG_VIRTFS
 310
 311 #define TYPE_VIRTIO_9P_PCI "virtio-9p-pci-base"
 312 #define VIRTIO_9P_PCI(obj) \
 313         OBJECT_CHECK(V9fsPCIState, (obj), TYPE_VIRTIO_9P_PCI)
 314
 315 typedef struct V9fsPCIState {
 316     VirtIOPCIProxy parent_obj;
 317     V9fsVirtioState vdev;
 318 } V9fsPCIState;
 319
 320 #endif
 321
 322 /*
 323  * virtio-rng-pci: This extends VirtioPCIProxy.
 324  */
 325 #define TYPE_VIRTIO_RNG_PCI "virtio-rng-pci-base"
 326 #define VIRTIO_RNG_PCI(obj) \
 327         OBJECT_CHECK(VirtIORngPCI, (obj), TYPE_VIRTIO_RNG_PCI)
 328
 329 struct VirtIORngPCI {
 330     VirtIOPCIProxy parent_obj;
 331     VirtIORNG vdev;
 332 };
 333
 334 /*
 335  * virtio-input-pci: This extends VirtioPCIProxy.
 336  */
 337 #define TYPE_VIRTIO_INPUT_PCI "virtio-input-pci"
 338
 339 /*
 340  * virtio-gpu-pci: This extends VirtioPCIProxy.
 341  */
 342 #define TYPE_VIRTIO_GPU_PCI "virtio-gpu-pci"
 343 #define VIRTIO_GPU_PCI(obj) \
 344         OBJECT_CHECK(VirtIOGPUPCI, (obj), TYPE_VIRTIO_GPU_PCI)
 345
 346 struct VirtIOGPUPCI {
 347     VirtIOPCIProxy parent_obj;
 348     VirtIOGPU vdev;
 349 };
 350
 351 /*
 352  * virtio-crypto-pci: This extends VirtioPCIProxy.
 353  */
 354 #define TYPE_VIRTIO_CRYPTO_PCI "virtio-crypto-pci"
 355 #define VIRTIO_CRYPTO_PCI(obj) \
 356         OBJECT_CHECK(VirtIOCryptoPCI, (obj), TYPE_VIRTIO_CRYPTO_PCI)
 357
 358 struct VirtIOCryptoPCI {
 359     VirtIOPCIProxy parent_obj;
 360     VirtIOCrypto vdev;
 361 };
 362
 363 /* Virtio ABI version, if we increment this, we break the guest driver. */
 364 #define VIRTIO_PCI_ABI_VERSION          0
 365
 366 /* Input for virtio_pci_types_register() */
 367 typedef struct VirtioPCIDeviceTypeInfo {
 368     /*
 369      * Common base class for the subclasses below.
 370      *
 371      * Required only if transitional_name or non_transitional_name is set.
 372      *
 373      * We need a separate base type instead of making all types
 374      * inherit from generic_name for two reasons:
 375      * 1) generic_name implements INTERFACE_PCIE_DEVICE, but
 376      *    transitional_name does not.
 377      * 2) generic_name has the "disable-legacy" and "disable-modern"
 378      *    properties, transitional_name and non_transitional name don't.
 379      */
 380     const char *base_name;
 381     /*
 382      * Generic device type.  Optional.
 383      *
 384      * Supports both transitional and non-transitional modes,
 385      * using the disable-legacy and disable-modern properties.
 386      * If disable-legacy=auto, (non-)transitional mode is selected
 387      * depending on the bus where the device is plugged.
 388      *
 389      * Implements both INTERFACE_PCIE_DEVICE and INTERFACE_CONVENTIONAL_PCI_DEVICE,
 390      * but PCI Express is supported only in non-transitional mode.
 391      *
 392      * The only type implemented by QEMU 3.1 and older.
 393      */
 394     const char *generic_name;
 395     /*
 396      * The transitional device type.  Optional.
 397      *
 398      * Implements both INTERFACE_PCIE_DEVICE and INTERFACE_CONVENTIONAL_PCI_DEVICE.
 399      */
 400     const char *transitional_name;
 401     /*
 402      * The non-transitional device type.  Optional.
 403      *
 404      * Implements INTERFACE_CONVENTIONAL_PCI_DEVICE only.
 405      */
 406     const char *non_transitional_name;
 407
 408     /* Parent type.  If NULL, TYPE_VIRTIO_PCI is used */
 409     const char *parent;
 410
 411     /* Same as TypeInfo fields: */
 412     size_t instance_size;
 413     void (*instance_init)(Object *obj);
 414     void (*class_init)(ObjectClass *klass, void *data);
 415 } VirtioPCIDeviceTypeInfo;
 416
 417 /* Register virtio-pci type(s).  @t must be static. */
 418 void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t);
 419
 420 #endif