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 "loader.h"
  26 #include "kvm.h"
  27 #include "blockdev.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 #ifdef CONFIG_LINUX
 106     V9fsConf fsconf;
 107 #endif
 108     /* Max. number of ports we can have for a the virtio-serial device */
 109     uint32_t max_virtserial_ports;
 110     virtio_net_conf net;
 111 } VirtIOPCIProxy;
 112
 113 /* virtio device */
 114
 115 static void virtio_pci_notify(void *opaque, uint16_t vector)
 116 {
 117     VirtIOPCIProxy *proxy = opaque;
 118     if (msix_enabled(&proxy->pci_dev))
 119         msix_notify(&proxy->pci_dev, vector);
 120     else
 121         qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1);
 122 }
 123
 124 static void virtio_pci_save_config(void * opaque, QEMUFile *f)
 125 {
 126     VirtIOPCIProxy *proxy = opaque;
 127     pci_device_save(&proxy->pci_dev, f);
 128     msix_save(&proxy->pci_dev, f);
 129     if (msix_present(&proxy->pci_dev))
 130         qemu_put_be16(f, proxy->vdev->config_vector);
 131 }
 132
 133 static void virtio_pci_save_queue(void * opaque, int n, QEMUFile *f)
 134 {
 135     VirtIOPCIProxy *proxy = opaque;
 136     if (msix_present(&proxy->pci_dev))
 137         qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n));
 138 }
 139
 140 static int virtio_pci_load_config(void * opaque, QEMUFile *f)
 141 {
 142     VirtIOPCIProxy *proxy = opaque;
 143     int ret;
 144     ret = pci_device_load(&proxy->pci_dev, f);
 145     if (ret) {
 146         return ret;
 147     }
 148     msix_load(&proxy->pci_dev, f);
 149     if (msix_present(&proxy->pci_dev)) {
 150         qemu_get_be16s(f, &proxy->vdev->config_vector);
 151     } else {
 152         proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
 153     }
 154     if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
 155         return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
 156     }
 157
 158     /* Try to find out if the guest has bus master disabled, but is
 159        in ready state. Then we have a buggy guest OS. */
 160     if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
 161         !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 162         proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER;
 163     }
 164     return 0;
 165 }
 166
 167 static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f)
 168 {
 169     VirtIOPCIProxy *proxy = opaque;
 170     uint16_t vector;
 171     if (msix_present(&proxy->pci_dev)) {
 172         qemu_get_be16s(f, &vector);
 173     } else {
 174         vector = VIRTIO_NO_VECTOR;
 175     }
 176     virtio_queue_set_vector(proxy->vdev, n, vector);
 177     if (vector != VIRTIO_NO_VECTOR) {
 178         return msix_vector_use(&proxy->pci_dev, vector);
 179     }
 180     return 0;
 181 }
 182
 183 static void virtio_pci_reset(DeviceState *d)
 184 {
 185     VirtIOPCIProxy *proxy = container_of(d, VirtIOPCIProxy, pci_dev.qdev);
 186     virtio_reset(proxy->vdev);
 187     msix_reset(&proxy->pci_dev);
 188     proxy->bugs = 0;
 189 }
 190
 191 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 192 {
 193     VirtIOPCIProxy *proxy = opaque;
 194     VirtIODevice *vdev = proxy->vdev;
 195     target_phys_addr_t pa;
 196
 197     switch (addr) {
 198     case VIRTIO_PCI_GUEST_FEATURES:
 199         /* Guest does not negotiate properly?  We have to assume nothing. */
 200         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
 201             if (vdev->bad_features)
 202                 val = proxy->host_features & vdev->bad_features(vdev);
 203             else
 204                 val = 0;
 205         }
 206         if (vdev->set_features)
 207             vdev->set_features(vdev, val);
 208         vdev->guest_features = val;
 209         break;
 210     case VIRTIO_PCI_QUEUE_PFN:
 211         pa = (target_phys_addr_t)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 212         if (pa == 0) {
 213             virtio_reset(proxy->vdev);
 214             msix_unuse_all_vectors(&proxy->pci_dev);
 215         }
 216         else
 217             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
 218         break;
 219     case VIRTIO_PCI_QUEUE_SEL:
 220         if (val < VIRTIO_PCI_QUEUE_MAX)
 221             vdev->queue_sel = val;
 222         break;
 223     case VIRTIO_PCI_QUEUE_NOTIFY:
 224         virtio_queue_notify(vdev, val);
 225         break;
 226     case VIRTIO_PCI_STATUS:
 227         virtio_set_status(vdev, val & 0xFF);
 228         if (vdev->status == 0) {
 229             virtio_reset(proxy->vdev);
 230             msix_unuse_all_vectors(&proxy->pci_dev);
 231         }
 232
 233         /* Linux before 2.6.34 sets the device as OK without enabling
 234            the PCI device bus master bit. In this case we need to disable
 235            some safety checks. */
 236         if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
 237             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 238             proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER;
 239         }
 240         break;
 241     case VIRTIO_MSI_CONFIG_VECTOR:
 242         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
 243         /* Make it possible for guest to discover an error took place. */
 244         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 245             val = VIRTIO_NO_VECTOR;
 246         vdev->config_vector = val;
 247         break;
 248     case VIRTIO_MSI_QUEUE_VECTOR:
 249         msix_vector_unuse(&proxy->pci_dev,
 250                           virtio_queue_vector(vdev, vdev->queue_sel));
 251         /* Make it possible for guest to discover an error took place. */
 252         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 253             val = VIRTIO_NO_VECTOR;
 254         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
 255         break;
 256     default:
 257         fprintf(stderr, "%s: unexpected address 0x%x value 0x%x\n",
 258                 __func__, addr, val);
 259         break;
 260     }
 261 }
 262
 263 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
 264 {
 265     VirtIODevice *vdev = proxy->vdev;
 266     uint32_t ret = 0xFFFFFFFF;
 267
 268     switch (addr) {
 269     case VIRTIO_PCI_HOST_FEATURES:
 270         ret = proxy->host_features;
 271         break;
 272     case VIRTIO_PCI_GUEST_FEATURES:
 273         ret = vdev->guest_features;
 274         break;
 275     case VIRTIO_PCI_QUEUE_PFN:
 276         ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
 277               >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 278         break;
 279     case VIRTIO_PCI_QUEUE_NUM:
 280         ret = virtio_queue_get_num(vdev, vdev->queue_sel);
 281         break;
 282     case VIRTIO_PCI_QUEUE_SEL:
 283         ret = vdev->queue_sel;
 284         break;
 285     case VIRTIO_PCI_STATUS:
 286         ret = vdev->status;
 287         break;
 288     case VIRTIO_PCI_ISR:
 289         /* reading from the ISR also clears it. */
 290         ret = vdev->isr;
 291         vdev->isr = 0;
 292         qemu_set_irq(proxy->pci_dev.irq[0], 0);
 293         break;
 294     case VIRTIO_MSI_CONFIG_VECTOR:
 295         ret = vdev->config_vector;
 296         break;
 297     case VIRTIO_MSI_QUEUE_VECTOR:
 298         ret = virtio_queue_vector(vdev, vdev->queue_sel);
 299         break;
 300     default:
 301         break;
 302     }
 303
 304     return ret;
 305 }
 306
 307 static uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr)
 308 {
 309     VirtIOPCIProxy *proxy = opaque;
 310     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 311     addr -= proxy->addr;
 312     if (addr < config)
 313         return virtio_ioport_read(proxy, addr);
 314     addr -= config;
 315     return virtio_config_readb(proxy->vdev, addr);
 316 }
 317
 318 static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr)
 319 {
 320     VirtIOPCIProxy *proxy = opaque;
 321     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 322     addr -= proxy->addr;
 323     if (addr < config)
 324         return virtio_ioport_read(proxy, addr);
 325     addr -= config;
 326     return virtio_config_readw(proxy->vdev, addr);
 327 }
 328
 329 static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr)
 330 {
 331     VirtIOPCIProxy *proxy = opaque;
 332     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 333     addr -= proxy->addr;
 334     if (addr < config)
 335         return virtio_ioport_read(proxy, addr);
 336     addr -= config;
 337     return virtio_config_readl(proxy->vdev, addr);
 338 }
 339
 340 static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val)
 341 {
 342     VirtIOPCIProxy *proxy = opaque;
 343     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 344     addr -= proxy->addr;
 345     if (addr < config) {
 346         virtio_ioport_write(proxy, addr, val);
 347         return;
 348     }
 349     addr -= config;
 350     virtio_config_writeb(proxy->vdev, addr, val);
 351 }
 352
 353 static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val)
 354 {
 355     VirtIOPCIProxy *proxy = opaque;
 356     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 357     addr -= proxy->addr;
 358     if (addr < config) {
 359         virtio_ioport_write(proxy, addr, val);
 360         return;
 361     }
 362     addr -= config;
 363     virtio_config_writew(proxy->vdev, addr, val);
 364 }
 365
 366 static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
 367 {
 368     VirtIOPCIProxy *proxy = opaque;
 369     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 370     addr -= proxy->addr;
 371     if (addr < config) {
 372         virtio_ioport_write(proxy, addr, val);
 373         return;
 374     }
 375     addr -= config;
 376     virtio_config_writel(proxy->vdev, addr, val);
 377 }
 378
 379 static void virtio_map(PCIDevice *pci_dev, int region_num,
 380                        pcibus_t addr, pcibus_t size, int type)
 381 {
 382     VirtIOPCIProxy *proxy = container_of(pci_dev, VirtIOPCIProxy, pci_dev);
 383     VirtIODevice *vdev = proxy->vdev;
 384     unsigned config_len = VIRTIO_PCI_REGION_SIZE(pci_dev) + vdev->config_len;
 385
 386     proxy->addr = addr;
 387
 388     register_ioport_write(addr, config_len, 1, virtio_pci_config_writeb, proxy);
 389     register_ioport_write(addr, config_len, 2, virtio_pci_config_writew, proxy);
 390     register_ioport_write(addr, config_len, 4, virtio_pci_config_writel, proxy);
 391     register_ioport_read(addr, config_len, 1, virtio_pci_config_readb, proxy);
 392     register_ioport_read(addr, config_len, 2, virtio_pci_config_readw, proxy);
 393     register_ioport_read(addr, config_len, 4, virtio_pci_config_readl, proxy);
 394
 395     if (vdev->config_len)
 396         vdev->get_config(vdev, vdev->config);
 397 }
 398
 399 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 400                                 uint32_t val, int len)
 401 {
 402     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 403
 404     if (PCI_COMMAND == address) {
 405         if (!(val & PCI_COMMAND_MASTER)) {
 406             if (!(proxy->bugs & VIRTIO_PCI_BUG_BUS_MASTER)) {
 407                 virtio_set_status(proxy->vdev,
 408                                   proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
 409             }
 410         }
 411     }
 412
 413     pci_default_write_config(pci_dev, address, val, len);
 414     msix_write_config(pci_dev, address, val, len);
 415 }
 416
 417 static unsigned virtio_pci_get_features(void *opaque)
 418 {
 419     VirtIOPCIProxy *proxy = opaque;
 420     return proxy->host_features;
 421 }
 422
 423 static void virtio_pci_guest_notifier_read(void *opaque)
 424 {
 425     VirtQueue *vq = opaque;
 426     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 427     if (event_notifier_test_and_clear(n)) {
 428         virtio_irq(vq);
 429     }
 430 }
 431
 432 static int virtio_pci_mask_notifier(PCIDevice *dev, unsigned vector,
 433                                     void *opaque, int masked)
 434 {
 435 #ifdef CONFIG_KVM
 436     VirtQueue *vq = opaque;
 437     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 438     int r = kvm_set_irqfd(dev->msix_irq_entries[vector].gsi,
 439                           event_notifier_get_fd(notifier),
 440                           !masked);
 441     if (r < 0) {
 442         return (r == -ENOSYS) ? 0 : r;
 443     }
 444     if (masked) {
 445         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 446                             virtio_pci_guest_notifier_read, NULL, vq);
 447     } else {
 448         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 449                             NULL, NULL, NULL);
 450     }
 451     return 0;
 452 #else
 453     return -ENOSYS;
 454 #endif
 455 }
 456
 457 static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign)
 458 {
 459     VirtIOPCIProxy *proxy = opaque;
 460     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 461     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 462
 463     if (assign) {
 464         int r = event_notifier_init(notifier, 0);
 465         if (r < 0) {
 466             return r;
 467         }
 468         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 469                             virtio_pci_guest_notifier_read, NULL, vq);
 470         msix_set_mask_notifier(&proxy->pci_dev,
 471                                virtio_queue_vector(proxy->vdev, n), vq);
 472     } else {
 473         msix_unset_mask_notifier(&proxy->pci_dev,
 474                                  virtio_queue_vector(proxy->vdev, n));
 475         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 476                             NULL, NULL, NULL);
 477         /* Test and clear notifier before closing it,
 478          * in case poll callback didn't have time to run. */
 479         virtio_pci_guest_notifier_read(vq);
 480         event_notifier_cleanup(notifier);
 481     }
 482
 483     return 0;
 484 }
 485
 486 static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign)
 487 {
 488     VirtIOPCIProxy *proxy = opaque;
 489     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 490     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
 491     int r;
 492     if (assign) {
 493         r = event_notifier_init(notifier, 1);
 494         if (r < 0) {
 495             return r;
 496         }
 497         r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
 498                                        proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
 499                                        n, assign);
 500         if (r < 0) {
 501             event_notifier_cleanup(notifier);
 502         }
 503     } else {
 504         r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
 505                                        proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
 506                                        n, assign);
 507         if (r < 0) {
 508             return r;
 509         }
 510         event_notifier_cleanup(notifier);
 511     }
 512     return r;
 513 }
 514
 515 static const VirtIOBindings virtio_pci_bindings = {
 516     .notify = virtio_pci_notify,
 517     .save_config = virtio_pci_save_config,
 518     .load_config = virtio_pci_load_config,
 519     .save_queue = virtio_pci_save_queue,
 520     .load_queue = virtio_pci_load_queue,
 521     .get_features = virtio_pci_get_features,
 522     .set_host_notifier = virtio_pci_set_host_notifier,
 523     .set_guest_notifier = virtio_pci_set_guest_notifier,
 524 };
 525
 526 static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev,
 527                             uint16_t vendor, uint16_t device,
 528                             uint16_t class_code, uint8_t pif)
 529 {
 530     uint8_t *config;
 531     uint32_t size;
 532
 533     proxy->vdev = vdev;
 534
 535     config = proxy->pci_dev.config;
 536     pci_config_set_vendor_id(config, vendor);
 537     pci_config_set_device_id(config, device);
 538
 539     config[0x08] = VIRTIO_PCI_ABI_VERSION;
 540
 541     config[0x09] = pif;
 542     pci_config_set_class(config, class_code);
 543
 544     config[0x2c] = vendor & 0xFF;
 545     config[0x2d] = (vendor >> 8) & 0xFF;
 546     config[0x2e] = vdev->device_id & 0xFF;
 547     config[0x2f] = (vdev->device_id >> 8) & 0xFF;
 548
 549     config[0x3d] = 1;
 550
 551     if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors, 1, 0)) {
 552         pci_register_bar(&proxy->pci_dev, 1,
 553                          msix_bar_size(&proxy->pci_dev),
 554                          PCI_BASE_ADDRESS_SPACE_MEMORY,
 555                          msix_mmio_map);
 556     } else
 557         vdev->nvectors = 0;
 558
 559     proxy->pci_dev.config_write = virtio_write_config;
 560
 561     proxy->pci_dev.msix_mask_notifier = virtio_pci_mask_notifier;
 562
 563     size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len;
 564     if (size & (size-1))
 565         size = 1 << qemu_fls(size);
 566
 567     pci_register_bar(&proxy->pci_dev, 0, size, PCI_BASE_ADDRESS_SPACE_IO,
 568                            virtio_map);
 569
 570     virtio_bind_device(vdev, &virtio_pci_bindings, proxy);
 571     proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 572     proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
 573     proxy->host_features = vdev->get_features(vdev, proxy->host_features);
 574 }
 575
 576 static int virtio_blk_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_STORAGE_SCSI &&
 582         proxy->class_code != PCI_CLASS_STORAGE_OTHER)
 583         proxy->class_code = PCI_CLASS_STORAGE_SCSI;
 584
 585     vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block);
 586     if (!vdev) {
 587         return -1;
 588     }
 589     vdev->nvectors = proxy->nvectors;
 590     virtio_init_pci(proxy, vdev,
 591                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 592                     PCI_DEVICE_ID_VIRTIO_BLOCK,
 593                     proxy->class_code, 0x00);
 594     /* make the actual value visible */
 595     proxy->nvectors = vdev->nvectors;
 596     return 0;
 597 }
 598
 599 static int virtio_exit_pci(PCIDevice *pci_dev)
 600 {
 601     return msix_uninit(pci_dev);
 602 }
 603
 604 static int virtio_blk_exit_pci(PCIDevice *pci_dev)
 605 {
 606     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 607
 608     virtio_blk_exit(proxy->vdev);
 609     blockdev_mark_auto_del(proxy->block.bs);
 610     return virtio_exit_pci(pci_dev);
 611 }
 612
 613 static int virtio_serial_init_pci(PCIDevice *pci_dev)
 614 {
 615     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 616     VirtIODevice *vdev;
 617
 618     if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
 619         proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
 620         proxy->class_code != PCI_CLASS_OTHERS)          /* qemu-kvm  */
 621         proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER;
 622
 623     vdev = virtio_serial_init(&pci_dev->qdev, proxy->max_virtserial_ports);
 624     if (!vdev) {
 625         return -1;
 626     }
 627     vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
 628                                         ? proxy->max_virtserial_ports + 1
 629                                         : proxy->nvectors;
 630     virtio_init_pci(proxy, vdev,
 631                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 632                     PCI_DEVICE_ID_VIRTIO_CONSOLE,
 633                     proxy->class_code, 0x00);
 634     proxy->nvectors = vdev->nvectors;
 635     return 0;
 636 }
 637
 638 static int virtio_serial_exit_pci(PCIDevice *pci_dev)
 639 {
 640     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 641
 642     virtio_serial_exit(proxy->vdev);
 643     return virtio_exit_pci(pci_dev);
 644 }
 645
 646 static int virtio_net_init_pci(PCIDevice *pci_dev)
 647 {
 648     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 649     VirtIODevice *vdev;
 650
 651     vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net);
 652
 653     vdev->nvectors = proxy->nvectors;
 654     virtio_init_pci(proxy, vdev,
 655                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 656                     PCI_DEVICE_ID_VIRTIO_NET,
 657                     PCI_CLASS_NETWORK_ETHERNET,
 658                     0x00);
 659
 660     /* make the actual value visible */
 661     proxy->nvectors = vdev->nvectors;
 662     return 0;
 663 }
 664
 665 static int virtio_net_exit_pci(PCIDevice *pci_dev)
 666 {
 667     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 668
 669     virtio_net_exit(proxy->vdev);
 670     return virtio_exit_pci(pci_dev);
 671 }
 672
 673 static int virtio_balloon_init_pci(PCIDevice *pci_dev)
 674 {
 675     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 676     VirtIODevice *vdev;
 677
 678     vdev = virtio_balloon_init(&pci_dev->qdev);
 679     virtio_init_pci(proxy, vdev,
 680                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 681                     PCI_DEVICE_ID_VIRTIO_BALLOON,
 682                     PCI_CLASS_MEMORY_RAM,
 683                     0x00);
 684     return 0;
 685 }
 686
 687 #ifdef CONFIG_VIRTFS
 688 static int virtio_9p_init_pci(PCIDevice *pci_dev)
 689 {
 690     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 691     VirtIODevice *vdev;
 692
 693     vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
 694     virtio_init_pci(proxy, vdev,
 695                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 696                     0x1009,
 697                     0x2,
 698                     0x00);
 699
 700     return 0;
 701 }
 702 #endif
 703
 704 static PCIDeviceInfo virtio_info[] = {
 705     {
 706         .qdev.name = "virtio-blk-pci",
 707         .qdev.size = sizeof(VirtIOPCIProxy),
 708         .init      = virtio_blk_init_pci,
 709         .exit      = virtio_blk_exit_pci,
 710         .qdev.props = (Property[]) {
 711             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
 712             DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block),
 713             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
 714             DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
 715             DEFINE_PROP_END_OF_LIST(),
 716         },
 717         .qdev.reset = virtio_pci_reset,
 718     },{
 719         .qdev.name  = "virtio-net-pci",
 720         .qdev.size  = sizeof(VirtIOPCIProxy),
 721         .init       = virtio_net_init_pci,
 722         .exit       = virtio_net_exit_pci,
 723         .romfile    = "pxe-virtio.bin",
 724         .qdev.props = (Property[]) {
 725             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
 726             DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
 727             DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic),
 728             DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy,
 729                                net.txtimer, TX_TIMER_INTERVAL),
 730             DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy,
 731                               net.txburst, TX_BURST),
 732             DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
 733             DEFINE_PROP_END_OF_LIST(),
 734         },
 735         .qdev.reset = virtio_pci_reset,
 736     },{
 737         .qdev.name = "virtio-serial-pci",
 738         .qdev.alias = "virtio-serial",
 739         .qdev.size = sizeof(VirtIOPCIProxy),
 740         .init      = virtio_serial_init_pci,
 741         .exit      = virtio_serial_exit_pci,
 742         .qdev.props = (Property[]) {
 743             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
 744                                DEV_NVECTORS_UNSPECIFIED),
 745             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
 746             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 747             DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, max_virtserial_ports,
 748                                31),
 749             DEFINE_PROP_END_OF_LIST(),
 750         },
 751         .qdev.reset = virtio_pci_reset,
 752     },{
 753         .qdev.name = "virtio-balloon-pci",
 754         .qdev.size = sizeof(VirtIOPCIProxy),
 755         .init      = virtio_balloon_init_pci,
 756         .exit      = virtio_exit_pci,
 757         .qdev.props = (Property[]) {
 758             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 759             DEFINE_PROP_END_OF_LIST(),
 760         },
 761         .qdev.reset = virtio_pci_reset,
 762     },{
 763 #ifdef CONFIG_VIRTFS
 764         .qdev.name = "virtio-9p-pci",
 765         .qdev.size = sizeof(VirtIOPCIProxy),
 766         .init      = virtio_9p_init_pci,
 767         .qdev.props = (Property[]) {
 768             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 769             DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
 770             DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
 771             DEFINE_PROP_END_OF_LIST(),
 772         },
 773     }, {
 774 #endif
 775         /* end of list */
 776     }
 777 };
 778
 779 static void virtio_pci_register_devices(void)
 780 {
 781     pci_qdev_register_many(virtio_info);
 782 }
 783
 784 device_init(virtio_pci_register_devices)