hw/virtio-pci.c

   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
  16 #include <inttypes.h>
  17
  18 #include "virtio.h"
  19 #include "virtio-blk.h"
  20 #include "virtio-net.h"
  21 #include "pci.h"
  22 #include "qemu-error.h"
  23 #include "msix.h"
  24 #include "net.h"
  25 #include "block_int.h"
  26 #include "loader.h"
  27 #include "kvm.h"
  28
  29 /* from Linux's linux/virtio_pci.h */
  30
  31 /* A 32-bit r/o bitmask of the features supported by the host */
  32 #define VIRTIO_PCI_HOST_FEATURES        0
  33
  34 /* A 32-bit r/w bitmask of features activated by the guest */
  35 #define VIRTIO_PCI_GUEST_FEATURES       4
  36
  37 /* A 32-bit r/w PFN for the currently selected queue */
  38 #define VIRTIO_PCI_QUEUE_PFN            8
  39
  40 /* A 16-bit r/o queue size for the currently selected queue */
  41 #define VIRTIO_PCI_QUEUE_NUM            12
  42
  43 /* A 16-bit r/w queue selector */
  44 #define VIRTIO_PCI_QUEUE_SEL            14
  45
  46 /* A 16-bit r/w queue notifier */
  47 #define VIRTIO_PCI_QUEUE_NOTIFY         16
  48
  49 /* An 8-bit device status register.  */
  50 #define VIRTIO_PCI_STATUS               18
  51
  52 /* An 8-bit r/o interrupt status register.  Reading the value will return the
  53  * current contents of the ISR and will also clear it.  This is effectively
  54  * a read-and-acknowledge. */
  55 #define VIRTIO_PCI_ISR                  19
  56
  57 /* MSI-X registers: only enabled if MSI-X is enabled. */
  58 /* A 16-bit vector for configuration changes. */
  59 #define VIRTIO_MSI_CONFIG_VECTOR        20
  60 /* A 16-bit vector for selected queue notifications. */
  61 #define VIRTIO_MSI_QUEUE_VECTOR         22
  62
  63 /* Config space size */
  64 #define VIRTIO_PCI_CONFIG_NOMSI         20
  65 #define VIRTIO_PCI_CONFIG_MSI           24
  66 #define VIRTIO_PCI_REGION_SIZE(dev)     (msix_present(dev) ? \
  67                                          VIRTIO_PCI_CONFIG_MSI : \
  68                                          VIRTIO_PCI_CONFIG_NOMSI)
  69
  70 /* The remaining space is defined by each driver as the per-driver
  71  * configuration space */
  72 #define VIRTIO_PCI_CONFIG(dev)          (msix_enabled(dev) ? \
  73                                          VIRTIO_PCI_CONFIG_MSI : \
  74                                          VIRTIO_PCI_CONFIG_NOMSI)
  75
  76 /* Virtio ABI version, if we increment this, we break the guest driver. */
  77 #define VIRTIO_PCI_ABI_VERSION          0
  78
  79 /* How many bits to shift physical queue address written to QUEUE_PFN.
  80  * 12 is historical, and due to x86 page size. */
  81 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT    12
  82
  83 /* We can catch some guest bugs inside here so we continue supporting older
  84    guests. */
  85 #define VIRTIO_PCI_BUG_BUS_MASTER       (1 << 0)
  86
  87 /* QEMU doesn't strictly need write barriers since everything runs in
  88  * lock-step.  We'll leave the calls to wmb() in though to make it obvious for
  89  * KVM or if kqemu gets SMP support.
  90  */
  91 #define wmb() do { } while (0)
  92
  93 /* PCI bindings.  */
  94
  95 typedef struct {
  96     PCIDevice pci_dev;
  97     VirtIODevice *vdev;
  98     uint32_t bugs;
  99     uint32_t addr;
 100     uint32_t class_code;
 101     uint32_t nvectors;
 102     BlockConf block;
 103     NICConf nic;
 104     uint32_t host_features;
 105     /* Max. number of ports we can have for a the virtio-serial device */
 106     uint32_t max_virtserial_ports;
 107 } VirtIOPCIProxy;
 108
 109 /* virtio device */
 110
 111 static void virtio_pci_notify(void *opaque, uint16_t vector)
 112 {
 113     VirtIOPCIProxy *proxy = opaque;
 114     if (msix_enabled(&proxy->pci_dev))
 115         msix_notify(&proxy->pci_dev, vector);
 116     else
 117         qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1);
 118 }
 119
 120 static void virtio_pci_save_config(void * opaque, QEMUFile *f)
 121 {
 122     VirtIOPCIProxy *proxy = opaque;
 123     pci_device_save(&proxy->pci_dev, f);
 124     msix_save(&proxy->pci_dev, f);
 125     if (msix_present(&proxy->pci_dev))
 126         qemu_put_be16(f, proxy->vdev->config_vector);
 127 }
 128
 129 static void virtio_pci_save_queue(void * opaque, int n, QEMUFile *f)
 130 {
 131     VirtIOPCIProxy *proxy = opaque;
 132     if (msix_present(&proxy->pci_dev))
 133         qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n));
 134 }
 135
 136 static int virtio_pci_load_config(void * opaque, QEMUFile *f)
 137 {
 138     VirtIOPCIProxy *proxy = opaque;
 139     int ret;
 140     ret = pci_device_load(&proxy->pci_dev, f);
 141     if (ret) {
 142         return ret;
 143     }
 144     msix_load(&proxy->pci_dev, f);
 145     if (msix_present(&proxy->pci_dev)) {
 146         qemu_get_be16s(f, &proxy->vdev->config_vector);
 147     } else {
 148         proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
 149     }
 150     if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
 151         return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
 152     }
 153
 154     /* Try to find out if the guest has bus master disabled, but is
 155        in ready state. Then we have a buggy guest OS. */
 156     if (!(proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
 157         !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 158         proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER;
 159     }
 160     return 0;
 161 }
 162
 163 static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f)
 164 {
 165     VirtIOPCIProxy *proxy = opaque;
 166     uint16_t vector;
 167     if (msix_present(&proxy->pci_dev)) {
 168         qemu_get_be16s(f, &vector);
 169     } else {
 170         vector = VIRTIO_NO_VECTOR;
 171     }
 172     virtio_queue_set_vector(proxy->vdev, n, vector);
 173     if (vector != VIRTIO_NO_VECTOR) {
 174         return msix_vector_use(&proxy->pci_dev, vector);
 175     }
 176     return 0;
 177 }
 178
 179 static void virtio_pci_reset(DeviceState *d)
 180 {
 181     VirtIOPCIProxy *proxy = container_of(d, VirtIOPCIProxy, pci_dev.qdev);
 182     virtio_reset(proxy->vdev);
 183     msix_reset(&proxy->pci_dev);
 184     proxy->bugs = 0;
 185 }
 186
 187 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 188 {
 189     VirtIOPCIProxy *proxy = opaque;
 190     VirtIODevice *vdev = proxy->vdev;
 191     target_phys_addr_t pa;
 192
 193     switch (addr) {
 194     case VIRTIO_PCI_GUEST_FEATURES:
 195         /* Guest does not negotiate properly?  We have to assume nothing. */
 196         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
 197             if (vdev->bad_features)
 198                 val = proxy->host_features & vdev->bad_features(vdev);
 199             else
 200                 val = 0;
 201         }
 202         if (vdev->set_features)
 203             vdev->set_features(vdev, val);
 204         vdev->guest_features = val;
 205         break;
 206     case VIRTIO_PCI_QUEUE_PFN:
 207         pa = (target_phys_addr_t)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 208         if (pa == 0) {
 209             virtio_reset(proxy->vdev);
 210             msix_unuse_all_vectors(&proxy->pci_dev);
 211         }
 212         else
 213             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
 214         break;
 215     case VIRTIO_PCI_QUEUE_SEL:
 216         if (val < VIRTIO_PCI_QUEUE_MAX)
 217             vdev->queue_sel = val;
 218         break;
 219     case VIRTIO_PCI_QUEUE_NOTIFY:
 220         virtio_queue_notify(vdev, val);
 221         break;
 222     case VIRTIO_PCI_STATUS:
 223         virtio_set_status(vdev, val & 0xFF);
 224         if (vdev->status == 0) {
 225             virtio_reset(proxy->vdev);
 226             msix_unuse_all_vectors(&proxy->pci_dev);
 227         }
 228
 229         /* Linux before 2.6.34 sets the device as OK without enabling
 230            the PCI device bus master bit. In this case we need to disable
 231            some safety checks. */
 232         if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
 233             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 234             proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER;
 235         }
 236         break;
 237     case VIRTIO_MSI_CONFIG_VECTOR:
 238         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
 239         /* Make it possible for guest to discover an error took place. */
 240         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 241             val = VIRTIO_NO_VECTOR;
 242         vdev->config_vector = val;
 243         break;
 244     case VIRTIO_MSI_QUEUE_VECTOR:
 245         msix_vector_unuse(&proxy->pci_dev,
 246                           virtio_queue_vector(vdev, vdev->queue_sel));
 247         /* Make it possible for guest to discover an error took place. */
 248         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 249             val = VIRTIO_NO_VECTOR;
 250         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
 251         break;
 252     default:
 253         fprintf(stderr, "%s: unexpected address 0x%x value 0x%x\n",
 254                 __func__, addr, val);
 255         break;
 256     }
 257 }
 258
 259 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
 260 {
 261     VirtIODevice *vdev = proxy->vdev;
 262     uint32_t ret = 0xFFFFFFFF;
 263
 264     switch (addr) {
 265     case VIRTIO_PCI_HOST_FEATURES:
 266         ret = proxy->host_features;
 267         break;
 268     case VIRTIO_PCI_GUEST_FEATURES:
 269         ret = vdev->guest_features;
 270         break;
 271     case VIRTIO_PCI_QUEUE_PFN:
 272         ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
 273               >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 274         break;
 275     case VIRTIO_PCI_QUEUE_NUM:
 276         ret = virtio_queue_get_num(vdev, vdev->queue_sel);
 277         break;
 278     case VIRTIO_PCI_QUEUE_SEL:
 279         ret = vdev->queue_sel;
 280         break;
 281     case VIRTIO_PCI_STATUS:
 282         ret = vdev->status;
 283         break;
 284     case VIRTIO_PCI_ISR:
 285         /* reading from the ISR also clears it. */
 286         ret = vdev->isr;
 287         vdev->isr = 0;
 288         qemu_set_irq(proxy->pci_dev.irq[0], 0);
 289         break;
 290     case VIRTIO_MSI_CONFIG_VECTOR:
 291         ret = vdev->config_vector;
 292         break;
 293     case VIRTIO_MSI_QUEUE_VECTOR:
 294         ret = virtio_queue_vector(vdev, vdev->queue_sel);
 295         break;
 296     default:
 297         break;
 298     }
 299
 300     return ret;
 301 }
 302
 303 static uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr)
 304 {
 305     VirtIOPCIProxy *proxy = opaque;
 306     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 307     addr -= proxy->addr;
 308     if (addr < config)
 309         return virtio_ioport_read(proxy, addr);
 310     addr -= config;
 311     return virtio_config_readb(proxy->vdev, addr);
 312 }
 313
 314 static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr)
 315 {
 316     VirtIOPCIProxy *proxy = opaque;
 317     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 318     addr -= proxy->addr;
 319     if (addr < config)
 320         return virtio_ioport_read(proxy, addr);
 321     addr -= config;
 322     return virtio_config_readw(proxy->vdev, addr);
 323 }
 324
 325 static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr)
 326 {
 327     VirtIOPCIProxy *proxy = opaque;
 328     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 329     addr -= proxy->addr;
 330     if (addr < config)
 331         return virtio_ioport_read(proxy, addr);
 332     addr -= config;
 333     return virtio_config_readl(proxy->vdev, addr);
 334 }
 335
 336 static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val)
 337 {
 338     VirtIOPCIProxy *proxy = opaque;
 339     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 340     addr -= proxy->addr;
 341     if (addr < config) {
 342         virtio_ioport_write(proxy, addr, val);
 343         return;
 344     }
 345     addr -= config;
 346     virtio_config_writeb(proxy->vdev, addr, val);
 347 }
 348
 349 static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val)
 350 {
 351     VirtIOPCIProxy *proxy = opaque;
 352     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 353     addr -= proxy->addr;
 354     if (addr < config) {
 355         virtio_ioport_write(proxy, addr, val);
 356         return;
 357     }
 358     addr -= config;
 359     virtio_config_writew(proxy->vdev, addr, val);
 360 }
 361
 362 static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
 363 {
 364     VirtIOPCIProxy *proxy = opaque;
 365     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 366     addr -= proxy->addr;
 367     if (addr < config) {
 368         virtio_ioport_write(proxy, addr, val);
 369         return;
 370     }
 371     addr -= config;
 372     virtio_config_writel(proxy->vdev, addr, val);
 373 }
 374
 375 static void virtio_map(PCIDevice *pci_dev, int region_num,
 376                        pcibus_t addr, pcibus_t size, int type)
 377 {
 378     VirtIOPCIProxy *proxy = container_of(pci_dev, VirtIOPCIProxy, pci_dev);
 379     VirtIODevice *vdev = proxy->vdev;
 380     unsigned config_len = VIRTIO_PCI_REGION_SIZE(pci_dev) + vdev->config_len;
 381
 382     proxy->addr = addr;
 383
 384     register_ioport_write(addr, config_len, 1, virtio_pci_config_writeb, proxy);
 385     register_ioport_write(addr, config_len, 2, virtio_pci_config_writew, proxy);
 386     register_ioport_write(addr, config_len, 4, virtio_pci_config_writel, proxy);
 387     register_ioport_read(addr, config_len, 1, virtio_pci_config_readb, proxy);
 388     register_ioport_read(addr, config_len, 2, virtio_pci_config_readw, proxy);
 389     register_ioport_read(addr, config_len, 4, virtio_pci_config_readl, proxy);
 390
 391     if (vdev->config_len)
 392         vdev->get_config(vdev, vdev->config);
 393 }
 394
 395 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 396                                 uint32_t val, int len)
 397 {
 398     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 399
 400     if (PCI_COMMAND == address) {
 401         if (!(val & PCI_COMMAND_MASTER)) {
 402             if (!(proxy->bugs & VIRTIO_PCI_BUG_BUS_MASTER)) {
 403                 virtio_set_status(proxy->vdev,
 404                                   proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
 405             }
 406         }
 407     }
 408
 409     pci_default_write_config(pci_dev, address, val, len);
 410     msix_write_config(pci_dev, address, val, len);
 411 }
 412
 413 static unsigned virtio_pci_get_features(void *opaque)
 414 {
 415     VirtIOPCIProxy *proxy = opaque;
 416     return proxy->host_features;
 417 }
 418
 419 static void virtio_pci_guest_notifier_read(void *opaque)
 420 {
 421     VirtQueue *vq = opaque;
 422     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 423     if (event_notifier_test_and_clear(n)) {
 424         virtio_irq(vq);
 425     }
 426 }
 427
 428 static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign)
 429 {
 430     VirtIOPCIProxy *proxy = opaque;
 431     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 432     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 433
 434     if (assign) {
 435         int r = event_notifier_init(notifier, 0);
 436         if (r < 0) {
 437             return r;
 438         }
 439         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 440                             virtio_pci_guest_notifier_read, NULL, vq);
 441     } else {
 442         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 443                             NULL, NULL, NULL);
 444         event_notifier_cleanup(notifier);
 445     }
 446
 447     return 0;
 448 }
 449
 450 static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign)
 451 {
 452     VirtIOPCIProxy *proxy = opaque;
 453     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 454     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
 455     int r;
 456     if (assign) {
 457         r = event_notifier_init(notifier, 1);
 458         if (r < 0) {
 459             return r;
 460         }
 461         r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
 462                                        proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
 463                                        n, assign);
 464         if (r < 0) {
 465             event_notifier_cleanup(notifier);
 466         }
 467     } else {
 468         r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
 469                                        proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
 470                                        n, assign);
 471         if (r < 0) {
 472             return r;
 473         }
 474         event_notifier_cleanup(notifier);
 475     }
 476     return r;
 477 }
 478
 479 static const VirtIOBindings virtio_pci_bindings = {
 480     .notify = virtio_pci_notify,
 481     .save_config = virtio_pci_save_config,
 482     .load_config = virtio_pci_load_config,
 483     .save_queue = virtio_pci_save_queue,
 484     .load_queue = virtio_pci_load_queue,
 485     .get_features = virtio_pci_get_features,
 486     .set_host_notifier = virtio_pci_set_host_notifier,
 487     .set_guest_notifier = virtio_pci_set_guest_notifier,
 488 };
 489
 490 static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev,
 491                             uint16_t vendor, uint16_t device,
 492                             uint16_t class_code, uint8_t pif)
 493 {
 494     uint8_t *config;
 495     uint32_t size;
 496
 497     proxy->vdev = vdev;
 498
 499     config = proxy->pci_dev.config;
 500     pci_config_set_vendor_id(config, vendor);
 501     pci_config_set_device_id(config, device);
 502
 503     config[0x08] = VIRTIO_PCI_ABI_VERSION;
 504
 505     config[0x09] = pif;
 506     pci_config_set_class(config, class_code);
 507     config[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL;
 508
 509     config[0x2c] = vendor & 0xFF;
 510     config[0x2d] = (vendor >> 8) & 0xFF;
 511     config[0x2e] = vdev->device_id & 0xFF;
 512     config[0x2f] = (vdev->device_id >> 8) & 0xFF;
 513
 514     config[0x3d] = 1;
 515
 516     if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors, 1, 0)) {
 517         pci_register_bar(&proxy->pci_dev, 1,
 518                          msix_bar_size(&proxy->pci_dev),
 519                          PCI_BASE_ADDRESS_SPACE_MEMORY,
 520                          msix_mmio_map);
 521     } else
 522         vdev->nvectors = 0;
 523
 524     proxy->pci_dev.config_write = virtio_write_config;
 525
 526     size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len;
 527     if (size & (size-1))
 528         size = 1 << qemu_fls(size);
 529
 530     pci_register_bar(&proxy->pci_dev, 0, size, PCI_BASE_ADDRESS_SPACE_IO,
 531                            virtio_map);
 532
 533     virtio_bind_device(vdev, &virtio_pci_bindings, proxy);
 534     proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 535     proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
 536     proxy->host_features = vdev->get_features(vdev, proxy->host_features);
 537 }
 538
 539 static int virtio_blk_init_pci(PCIDevice *pci_dev)
 540 {
 541     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 542     VirtIODevice *vdev;
 543
 544     if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
 545         proxy->class_code != PCI_CLASS_STORAGE_OTHER)
 546         proxy->class_code = PCI_CLASS_STORAGE_SCSI;
 547
 548     if (!proxy->block.dinfo) {
 549         error_report("virtio-blk-pci: drive property not set");
 550         return -1;
 551     }
 552     vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block);
 553     vdev->nvectors = proxy->nvectors;
 554     virtio_init_pci(proxy, vdev,
 555                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 556                     PCI_DEVICE_ID_VIRTIO_BLOCK,
 557                     proxy->class_code, 0x00);
 558     /* make the actual value visible */
 559     proxy->nvectors = vdev->nvectors;
 560     return 0;
 561 }
 562
 563 static int virtio_exit_pci(PCIDevice *pci_dev)
 564 {
 565     return msix_uninit(pci_dev);
 566 }
 567
 568 static int virtio_blk_exit_pci(PCIDevice *pci_dev)
 569 {
 570     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 571
 572     drive_uninit(proxy->block.dinfo);
 573     return virtio_exit_pci(pci_dev);
 574 }
 575
 576 static int virtio_serial_init_pci(PCIDevice *pci_dev)
 577 {
 578     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 579     VirtIODevice *vdev;
 580
 581     if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
 582         proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
 583         proxy->class_code != PCI_CLASS_OTHERS)          /* qemu-kvm  */
 584         proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER;
 585
 586     vdev = virtio_serial_init(&pci_dev->qdev, proxy->max_virtserial_ports);
 587     if (!vdev) {
 588         return -1;
 589     }
 590     vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
 591                                         ? proxy->max_virtserial_ports + 1
 592                                         : proxy->nvectors;
 593     virtio_init_pci(proxy, vdev,
 594                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 595                     PCI_DEVICE_ID_VIRTIO_CONSOLE,
 596                     proxy->class_code, 0x00);
 597     proxy->nvectors = vdev->nvectors;
 598     return 0;
 599 }
 600
 601 static int virtio_net_init_pci(PCIDevice *pci_dev)
 602 {
 603     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 604     VirtIODevice *vdev;
 605
 606     vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic);
 607
 608     vdev->nvectors = proxy->nvectors;
 609     virtio_init_pci(proxy, vdev,
 610                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 611                     PCI_DEVICE_ID_VIRTIO_NET,
 612                     PCI_CLASS_NETWORK_ETHERNET,
 613                     0x00);
 614
 615     /* make the actual value visible */
 616     proxy->nvectors = vdev->nvectors;
 617     return 0;
 618 }
 619
 620 static int virtio_net_exit_pci(PCIDevice *pci_dev)
 621 {
 622     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 623
 624     virtio_net_exit(proxy->vdev);
 625     return virtio_exit_pci(pci_dev);
 626 }
 627
 628 static int virtio_balloon_init_pci(PCIDevice *pci_dev)
 629 {
 630     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 631     VirtIODevice *vdev;
 632
 633     vdev = virtio_balloon_init(&pci_dev->qdev);
 634     virtio_init_pci(proxy, vdev,
 635                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 636                     PCI_DEVICE_ID_VIRTIO_BALLOON,
 637                     PCI_CLASS_MEMORY_RAM,
 638                     0x00);
 639     return 0;
 640 }
 641
 642 static PCIDeviceInfo virtio_info[] = {
 643     {
 644         .qdev.name = "virtio-blk-pci",
 645         .qdev.size = sizeof(VirtIOPCIProxy),
 646         .init      = virtio_blk_init_pci,
 647         .exit      = virtio_blk_exit_pci,
 648         .qdev.props = (Property[]) {
 649             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
 650             DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block),
 651             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
 652             DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
 653             DEFINE_PROP_END_OF_LIST(),
 654         },
 655         .qdev.reset = virtio_pci_reset,
 656     },{
 657         .qdev.name  = "virtio-net-pci",
 658         .qdev.size  = sizeof(VirtIOPCIProxy),
 659         .init       = virtio_net_init_pci,
 660         .exit       = virtio_net_exit_pci,
 661         .romfile    = "pxe-virtio.bin",
 662         .qdev.props = (Property[]) {
 663             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
 664             DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
 665             DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic),
 666             DEFINE_PROP_END_OF_LIST(),
 667         },
 668         .qdev.reset = virtio_pci_reset,
 669     },{
 670         .qdev.name = "virtio-serial-pci",
 671         .qdev.alias = "virtio-serial",
 672         .qdev.size = sizeof(VirtIOPCIProxy),
 673         .init      = virtio_serial_init_pci,
 674         .exit      = virtio_exit_pci,
 675         .qdev.props = (Property[]) {
 676             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
 677                                DEV_NVECTORS_UNSPECIFIED),
 678             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
 679             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 680             DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, max_virtserial_ports,
 681                                31),
 682             DEFINE_PROP_END_OF_LIST(),
 683         },
 684         .qdev.reset = virtio_pci_reset,
 685     },{
 686         .qdev.name = "virtio-balloon-pci",
 687         .qdev.size = sizeof(VirtIOPCIProxy),
 688         .init      = virtio_balloon_init_pci,
 689         .exit      = virtio_exit_pci,
 690         .qdev.props = (Property[]) {
 691             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 692             DEFINE_PROP_END_OF_LIST(),
 693         },
 694         .qdev.reset = virtio_pci_reset,
 695     },{
 696         /* end of list */
 697     }
 698 };
 699
 700 static void virtio_pci_register_devices(void)
 701 {
 702     pci_qdev_register_many(virtio_info);
 703 }
 704
 705 device_init(virtio_pci_register_devices)