hw/virtio/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  * Contributions after 2012-01-13 are licensed under the terms of the
  15  * GNU GPL, version 2 or (at your option) any later version.
  16  */
  17
  18 #include <inttypes.h>
  19
  20 #include "hw/virtio/virtio.h"
  21 #include "hw/virtio/virtio-blk.h"
  22 #include "hw/virtio/virtio-net.h"
  23 #include "hw/virtio/virtio-serial.h"
  24 #include "hw/virtio/virtio-scsi.h"
  25 #include "hw/virtio/virtio-balloon.h"
  26 #include "hw/pci/pci.h"
  27 #include "qemu/error-report.h"
  28 #include "hw/pci/msi.h"
  29 #include "hw/pci/msix.h"
  30 #include "hw/loader.h"
  31 #include "sysemu/kvm.h"
  32 #include "sysemu/blockdev.h"
  33 #include "virtio-pci.h"
  34 #include "qemu/range.h"
  35 #include "hw/virtio/virtio-bus.h"
  36 #include "qapi/visitor.h"
  37
  38 /* from Linux's linux/virtio_pci.h */
  39
  40 /* A 32-bit r/o bitmask of the features supported by the host */
  41 #define VIRTIO_PCI_HOST_FEATURES        0
  42
  43 /* A 32-bit r/w bitmask of features activated by the guest */
  44 #define VIRTIO_PCI_GUEST_FEATURES       4
  45
  46 /* A 32-bit r/w PFN for the currently selected queue */
  47 #define VIRTIO_PCI_QUEUE_PFN            8
  48
  49 /* A 16-bit r/o queue size for the currently selected queue */
  50 #define VIRTIO_PCI_QUEUE_NUM            12
  51
  52 /* A 16-bit r/w queue selector */
  53 #define VIRTIO_PCI_QUEUE_SEL            14
  54
  55 /* A 16-bit r/w queue notifier */
  56 #define VIRTIO_PCI_QUEUE_NOTIFY         16
  57
  58 /* An 8-bit device status register.  */
  59 #define VIRTIO_PCI_STATUS               18
  60
  61 /* An 8-bit r/o interrupt status register.  Reading the value will return the
  62  * current contents of the ISR and will also clear it.  This is effectively
  63  * a read-and-acknowledge. */
  64 #define VIRTIO_PCI_ISR                  19
  65
  66 /* MSI-X registers: only enabled if MSI-X is enabled. */
  67 /* A 16-bit vector for configuration changes. */
  68 #define VIRTIO_MSI_CONFIG_VECTOR        20
  69 /* A 16-bit vector for selected queue notifications. */
  70 #define VIRTIO_MSI_QUEUE_VECTOR         22
  71
  72 /* Config space size */
  73 #define VIRTIO_PCI_CONFIG_NOMSI         20
  74 #define VIRTIO_PCI_CONFIG_MSI           24
  75 #define VIRTIO_PCI_REGION_SIZE(dev)     (msix_present(dev) ? \
  76                                          VIRTIO_PCI_CONFIG_MSI : \
  77                                          VIRTIO_PCI_CONFIG_NOMSI)
  78
  79 /* The remaining space is defined by each driver as the per-driver
  80  * configuration space */
  81 #define VIRTIO_PCI_CONFIG(dev)          (msix_enabled(dev) ? \
  82                                          VIRTIO_PCI_CONFIG_MSI : \
  83                                          VIRTIO_PCI_CONFIG_NOMSI)
  84
  85 /* How many bits to shift physical queue address written to QUEUE_PFN.
  86  * 12 is historical, and due to x86 page size. */
  87 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT    12
  88
  89 /* Flags track per-device state like workarounds for quirks in older guests. */
  90 #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG  (1 << 0)
  91
  92 /* HACK for virtio to determine if it's running a big endian guest */
  93 bool virtio_is_big_endian(void);
  94
  95 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
  96                                VirtIOPCIProxy *dev);
  97
  98 /* virtio device */
  99 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
 100 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d)
 101 {
 102     return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
 103 }
 104
 105 /* DeviceState to VirtIOPCIProxy. Note: used on datapath,
 106  * be careful and test performance if you change this.
 107  */
 108 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d)
 109 {
 110     return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
 111 }
 112
 113 static void virtio_pci_notify(DeviceState *d, uint16_t vector)
 114 {
 115     VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d);
 116
 117     if (msix_enabled(&proxy->pci_dev))
 118         msix_notify(&proxy->pci_dev, vector);
 119     else {
 120         VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 121         pci_set_irq(&proxy->pci_dev, vdev->isr & 1);
 122     }
 123 }
 124
 125 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f)
 126 {
 127     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 128     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 129
 130     pci_device_save(&proxy->pci_dev, f);
 131     msix_save(&proxy->pci_dev, f);
 132     if (msix_present(&proxy->pci_dev))
 133         qemu_put_be16(f, vdev->config_vector);
 134 }
 135
 136 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
 137 {
 138     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 139     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 140
 141     if (msix_present(&proxy->pci_dev))
 142         qemu_put_be16(f, virtio_queue_vector(vdev, n));
 143 }
 144
 145 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
 146 {
 147     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 148     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 149
 150     int ret;
 151     ret = pci_device_load(&proxy->pci_dev, f);
 152     if (ret) {
 153         return ret;
 154     }
 155     msix_unuse_all_vectors(&proxy->pci_dev);
 156     msix_load(&proxy->pci_dev, f);
 157     if (msix_present(&proxy->pci_dev)) {
 158         qemu_get_be16s(f, &vdev->config_vector);
 159     } else {
 160         vdev->config_vector = VIRTIO_NO_VECTOR;
 161     }
 162     if (vdev->config_vector != VIRTIO_NO_VECTOR) {
 163         return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
 164     }
 165     return 0;
 166 }
 167
 168 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
 169 {
 170     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 171     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 172
 173     uint16_t vector;
 174     if (msix_present(&proxy->pci_dev)) {
 175         qemu_get_be16s(f, &vector);
 176     } else {
 177         vector = VIRTIO_NO_VECTOR;
 178     }
 179     virtio_queue_set_vector(vdev, n, vector);
 180     if (vector != VIRTIO_NO_VECTOR) {
 181         return msix_vector_use(&proxy->pci_dev, vector);
 182     }
 183     return 0;
 184 }
 185
 186 static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
 187                                                  int n, bool assign, bool set_handler)
 188 {
 189     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 190     VirtQueue *vq = virtio_get_queue(vdev, n);
 191     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
 192     int r = 0;
 193
 194     if (assign) {
 195         r = event_notifier_init(notifier, 1);
 196         if (r < 0) {
 197             error_report("%s: unable to init event notifier: %d",
 198                          __func__, r);
 199             return r;
 200         }
 201         virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
 202         memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
 203                                   true, n, notifier);
 204     } else {
 205         memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
 206                                   true, n, notifier);
 207         virtio_queue_set_host_notifier_fd_handler(vq, false, false);
 208         event_notifier_cleanup(notifier);
 209     }
 210     return r;
 211 }
 212
 213 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
 214 {
 215     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 216     int n, r;
 217
 218     if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) ||
 219         proxy->ioeventfd_disabled ||
 220         proxy->ioeventfd_started) {
 221         return;
 222     }
 223
 224     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 225         if (!virtio_queue_get_num(vdev, n)) {
 226             continue;
 227         }
 228
 229         r = virtio_pci_set_host_notifier_internal(proxy, n, true, true);
 230         if (r < 0) {
 231             goto assign_error;
 232         }
 233     }
 234     proxy->ioeventfd_started = true;
 235     return;
 236
 237 assign_error:
 238     while (--n >= 0) {
 239         if (!virtio_queue_get_num(vdev, n)) {
 240             continue;
 241         }
 242
 243         r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
 244         assert(r >= 0);
 245     }
 246     proxy->ioeventfd_started = false;
 247     error_report("%s: failed. Fallback to a userspace (slower).", __func__);
 248 }
 249
 250 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
 251 {
 252     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 253     int r;
 254     int n;
 255
 256     if (!proxy->ioeventfd_started) {
 257         return;
 258     }
 259
 260     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 261         if (!virtio_queue_get_num(vdev, n)) {
 262             continue;
 263         }
 264
 265         r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
 266         assert(r >= 0);
 267     }
 268     proxy->ioeventfd_started = false;
 269 }
 270
 271 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 272 {
 273     VirtIOPCIProxy *proxy = opaque;
 274     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 275     hwaddr pa;
 276
 277     switch (addr) {
 278     case VIRTIO_PCI_GUEST_FEATURES:
 279         /* Guest does not negotiate properly?  We have to assume nothing. */
 280         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
 281             val = virtio_bus_get_vdev_bad_features(&proxy->bus);
 282         }
 283         virtio_set_features(vdev, val);
 284         break;
 285     case VIRTIO_PCI_QUEUE_PFN:
 286         pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 287         if (pa == 0) {
 288             virtio_pci_stop_ioeventfd(proxy);
 289             virtio_reset(vdev);
 290             msix_unuse_all_vectors(&proxy->pci_dev);
 291         }
 292         else
 293             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
 294         break;
 295     case VIRTIO_PCI_QUEUE_SEL:
 296         if (val < VIRTIO_PCI_QUEUE_MAX)
 297             vdev->queue_sel = val;
 298         break;
 299     case VIRTIO_PCI_QUEUE_NOTIFY:
 300         if (val < VIRTIO_PCI_QUEUE_MAX) {
 301             virtio_queue_notify(vdev, val);
 302         }
 303         break;
 304     case VIRTIO_PCI_STATUS:
 305         if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
 306             virtio_pci_stop_ioeventfd(proxy);
 307         }
 308
 309         virtio_set_status(vdev, val & 0xFF);
 310
 311         if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
 312             virtio_pci_start_ioeventfd(proxy);
 313         }
 314
 315         if (vdev->status == 0) {
 316             virtio_reset(vdev);
 317             msix_unuse_all_vectors(&proxy->pci_dev);
 318         }
 319
 320         /* Linux before 2.6.34 sets the device as OK without enabling
 321            the PCI device bus master bit. In this case we need to disable
 322            some safety checks. */
 323         if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
 324             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 325             proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
 326         }
 327         break;
 328     case VIRTIO_MSI_CONFIG_VECTOR:
 329         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
 330         /* Make it possible for guest to discover an error took place. */
 331         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 332             val = VIRTIO_NO_VECTOR;
 333         vdev->config_vector = val;
 334         break;
 335     case VIRTIO_MSI_QUEUE_VECTOR:
 336         msix_vector_unuse(&proxy->pci_dev,
 337                           virtio_queue_vector(vdev, vdev->queue_sel));
 338         /* Make it possible for guest to discover an error took place. */
 339         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 340             val = VIRTIO_NO_VECTOR;
 341         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
 342         break;
 343     default:
 344         error_report("%s: unexpected address 0x%x value 0x%x",
 345                      __func__, addr, val);
 346         break;
 347     }
 348 }
 349
 350 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
 351 {
 352     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 353     uint32_t ret = 0xFFFFFFFF;
 354
 355     switch (addr) {
 356     case VIRTIO_PCI_HOST_FEATURES:
 357         ret = proxy->host_features;
 358         break;
 359     case VIRTIO_PCI_GUEST_FEATURES:
 360         ret = vdev->guest_features;
 361         break;
 362     case VIRTIO_PCI_QUEUE_PFN:
 363         ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
 364               >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 365         break;
 366     case VIRTIO_PCI_QUEUE_NUM:
 367         ret = virtio_queue_get_num(vdev, vdev->queue_sel);
 368         break;
 369     case VIRTIO_PCI_QUEUE_SEL:
 370         ret = vdev->queue_sel;
 371         break;
 372     case VIRTIO_PCI_STATUS:
 373         ret = vdev->status;
 374         break;
 375     case VIRTIO_PCI_ISR:
 376         /* reading from the ISR also clears it. */
 377         ret = vdev->isr;
 378         vdev->isr = 0;
 379         pci_irq_deassert(&proxy->pci_dev);
 380         break;
 381     case VIRTIO_MSI_CONFIG_VECTOR:
 382         ret = vdev->config_vector;
 383         break;
 384     case VIRTIO_MSI_QUEUE_VECTOR:
 385         ret = virtio_queue_vector(vdev, vdev->queue_sel);
 386         break;
 387     default:
 388         break;
 389     }
 390
 391     return ret;
 392 }
 393
 394 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
 395                                        unsigned size)
 396 {
 397     VirtIOPCIProxy *proxy = opaque;
 398     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 399     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 400     uint64_t val = 0;
 401     if (addr < config) {
 402         return virtio_ioport_read(proxy, addr);
 403     }
 404     addr -= config;
 405
 406     switch (size) {
 407     case 1:
 408         val = virtio_config_readb(vdev, addr);
 409         break;
 410     case 2:
 411         val = virtio_config_readw(vdev, addr);
 412         if (virtio_is_big_endian()) {
 413             val = bswap16(val);
 414         }
 415         break;
 416     case 4:
 417         val = virtio_config_readl(vdev, addr);
 418         if (virtio_is_big_endian()) {
 419             val = bswap32(val);
 420         }
 421         break;
 422     }
 423     return val;
 424 }
 425
 426 static void virtio_pci_config_write(void *opaque, hwaddr addr,
 427                                     uint64_t val, unsigned size)
 428 {
 429     VirtIOPCIProxy *proxy = opaque;
 430     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 431     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 432     if (addr < config) {
 433         virtio_ioport_write(proxy, addr, val);
 434         return;
 435     }
 436     addr -= config;
 437     /*
 438      * Virtio-PCI is odd. Ioports are LE but config space is target native
 439      * endian.
 440      */
 441     switch (size) {
 442     case 1:
 443         virtio_config_writeb(vdev, addr, val);
 444         break;
 445     case 2:
 446         if (virtio_is_big_endian()) {
 447             val = bswap16(val);
 448         }
 449         virtio_config_writew(vdev, addr, val);
 450         break;
 451     case 4:
 452         if (virtio_is_big_endian()) {
 453             val = bswap32(val);
 454         }
 455         virtio_config_writel(vdev, addr, val);
 456         break;
 457     }
 458 }
 459
 460 static const MemoryRegionOps virtio_pci_config_ops = {
 461     .read = virtio_pci_config_read,
 462     .write = virtio_pci_config_write,
 463     .impl = {
 464         .min_access_size = 1,
 465         .max_access_size = 4,
 466     },
 467     .endianness = DEVICE_LITTLE_ENDIAN,
 468 };
 469
 470 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 471                                 uint32_t val, int len)
 472 {
 473     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 474     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 475
 476     pci_default_write_config(pci_dev, address, val, len);
 477
 478     if (range_covers_byte(address, len, PCI_COMMAND) &&
 479         !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) &&
 480         !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) {
 481         virtio_pci_stop_ioeventfd(proxy);
 482         virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
 483     }
 484 }
 485
 486 static unsigned virtio_pci_get_features(DeviceState *d)
 487 {
 488     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 489     return proxy->host_features;
 490 }
 491
 492 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
 493                                         unsigned int queue_no,
 494                                         unsigned int vector,
 495                                         MSIMessage msg)
 496 {
 497     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 498     int ret;
 499
 500     if (irqfd->users == 0) {
 501         ret = kvm_irqchip_add_msi_route(kvm_state, msg);
 502         if (ret < 0) {
 503             return ret;
 504         }
 505         irqfd->virq = ret;
 506     }
 507     irqfd->users++;
 508     return 0;
 509 }
 510
 511 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
 512                                              unsigned int vector)
 513 {
 514     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 515     if (--irqfd->users == 0) {
 516         kvm_irqchip_release_virq(kvm_state, irqfd->virq);
 517     }
 518 }
 519
 520 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
 521                                  unsigned int queue_no,
 522                                  unsigned int vector)
 523 {
 524     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 525     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 526     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 527     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 528     int ret;
 529     ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, NULL, irqfd->virq);
 530     return ret;
 531 }
 532
 533 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
 534                                       unsigned int queue_no,
 535                                       unsigned int vector)
 536 {
 537     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 538     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 539     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 540     VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
 541     int ret;
 542
 543     ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq);
 544     assert(ret == 0);
 545 }
 546
 547 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
 548 {
 549     PCIDevice *dev = &proxy->pci_dev;
 550     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 551     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 552     unsigned int vector;
 553     int ret, queue_no;
 554     MSIMessage msg;
 555
 556     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 557         if (!virtio_queue_get_num(vdev, queue_no)) {
 558             break;
 559         }
 560         vector = virtio_queue_vector(vdev, queue_no);
 561         if (vector >= msix_nr_vectors_allocated(dev)) {
 562             continue;
 563         }
 564         msg = msix_get_message(dev, vector);
 565         ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg);
 566         if (ret < 0) {
 567             goto undo;
 568         }
 569         /* If guest supports masking, set up irqfd now.
 570          * Otherwise, delay until unmasked in the frontend.
 571          */
 572         if (k->guest_notifier_mask) {
 573             ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 574             if (ret < 0) {
 575                 kvm_virtio_pci_vq_vector_release(proxy, vector);
 576                 goto undo;
 577             }
 578         }
 579     }
 580     return 0;
 581
 582 undo:
 583     while (--queue_no >= 0) {
 584         vector = virtio_queue_vector(vdev, queue_no);
 585         if (vector >= msix_nr_vectors_allocated(dev)) {
 586             continue;
 587         }
 588         if (k->guest_notifier_mask) {
 589             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 590         }
 591         kvm_virtio_pci_vq_vector_release(proxy, vector);
 592     }
 593     return ret;
 594 }
 595
 596 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
 597 {
 598     PCIDevice *dev = &proxy->pci_dev;
 599     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 600     unsigned int vector;
 601     int queue_no;
 602     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 603
 604     for (queue_no = 0; queue_no < nvqs; queue_no++) {
 605         if (!virtio_queue_get_num(vdev, queue_no)) {
 606             break;
 607         }
 608         vector = virtio_queue_vector(vdev, queue_no);
 609         if (vector >= msix_nr_vectors_allocated(dev)) {
 610             continue;
 611         }
 612         /* If guest supports masking, clean up irqfd now.
 613          * Otherwise, it was cleaned when masked in the frontend.
 614          */
 615         if (k->guest_notifier_mask) {
 616             kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 617         }
 618         kvm_virtio_pci_vq_vector_release(proxy, vector);
 619     }
 620 }
 621
 622 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
 623                                        unsigned int queue_no,
 624                                        unsigned int vector,
 625                                        MSIMessage msg)
 626 {
 627     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 628     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 629     VirtQueue *vq = virtio_get_queue(vdev, queue_no);
 630     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 631     VirtIOIRQFD *irqfd;
 632     int ret = 0;
 633
 634     if (proxy->vector_irqfd) {
 635         irqfd = &proxy->vector_irqfd[vector];
 636         if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
 637             ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg);
 638             if (ret < 0) {
 639                 return ret;
 640             }
 641         }
 642     }
 643
 644     /* If guest supports masking, irqfd is already setup, unmask it.
 645      * Otherwise, set it up now.
 646      */
 647     if (k->guest_notifier_mask) {
 648         k->guest_notifier_mask(vdev, queue_no, false);
 649         /* Test after unmasking to avoid losing events. */
 650         if (k->guest_notifier_pending &&
 651             k->guest_notifier_pending(vdev, queue_no)) {
 652             event_notifier_set(n);
 653         }
 654     } else {
 655         ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
 656     }
 657     return ret;
 658 }
 659
 660 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
 661                                              unsigned int queue_no,
 662                                              unsigned int vector)
 663 {
 664     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 665     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 666
 667     /* If guest supports masking, keep irqfd but mask it.
 668      * Otherwise, clean it up now.
 669      */
 670     if (k->guest_notifier_mask) {
 671         k->guest_notifier_mask(vdev, queue_no, true);
 672     } else {
 673         kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
 674     }
 675 }
 676
 677 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
 678                                     MSIMessage msg)
 679 {
 680     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 681     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 682     int ret, queue_no;
 683
 684     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 685         if (!virtio_queue_get_num(vdev, queue_no)) {
 686             break;
 687         }
 688         if (virtio_queue_vector(vdev, queue_no) != vector) {
 689             continue;
 690         }
 691         ret = virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg);
 692         if (ret < 0) {
 693             goto undo;
 694         }
 695     }
 696     return 0;
 697
 698 undo:
 699     while (--queue_no >= 0) {
 700         if (virtio_queue_vector(vdev, queue_no) != vector) {
 701             continue;
 702         }
 703         virtio_pci_vq_vector_mask(proxy, queue_no, vector);
 704     }
 705     return ret;
 706 }
 707
 708 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
 709 {
 710     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 711     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 712     int queue_no;
 713
 714     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 715         if (!virtio_queue_get_num(vdev, queue_no)) {
 716             break;
 717         }
 718         if (virtio_queue_vector(vdev, queue_no) != vector) {
 719             continue;
 720         }
 721         virtio_pci_vq_vector_mask(proxy, queue_no, vector);
 722     }
 723 }
 724
 725 static void virtio_pci_vector_poll(PCIDevice *dev,
 726                                    unsigned int vector_start,
 727                                    unsigned int vector_end)
 728 {
 729     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 730     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 731     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 732     int queue_no;
 733     unsigned int vector;
 734     EventNotifier *notifier;
 735     VirtQueue *vq;
 736
 737     for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
 738         if (!virtio_queue_get_num(vdev, queue_no)) {
 739             break;
 740         }
 741         vector = virtio_queue_vector(vdev, queue_no);
 742         if (vector < vector_start || vector >= vector_end ||
 743             !msix_is_masked(dev, vector)) {
 744             continue;
 745         }
 746         vq = virtio_get_queue(vdev, queue_no);
 747         notifier = virtio_queue_get_guest_notifier(vq);
 748         if (k->guest_notifier_pending) {
 749             if (k->guest_notifier_pending(vdev, queue_no)) {
 750                 msix_set_pending(dev, vector);
 751             }
 752         } else if (event_notifier_test_and_clear(notifier)) {
 753             msix_set_pending(dev, vector);
 754         }
 755     }
 756 }
 757
 758 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
 759                                          bool with_irqfd)
 760 {
 761     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 762     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 763     VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
 764     VirtQueue *vq = virtio_get_queue(vdev, n);
 765     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 766
 767     if (assign) {
 768         int r = event_notifier_init(notifier, 0);
 769         if (r < 0) {
 770             return r;
 771         }
 772         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 773     } else {
 774         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
 775         event_notifier_cleanup(notifier);
 776     }
 777
 778     if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) {
 779         vdc->guest_notifier_mask(vdev, n, !assign);
 780     }
 781
 782     return 0;
 783 }
 784
 785 static bool virtio_pci_query_guest_notifiers(DeviceState *d)
 786 {
 787     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 788     return msix_enabled(&proxy->pci_dev);
 789 }
 790
 791 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
 792 {
 793     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 794     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 795     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 796     int r, n;
 797     bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
 798         kvm_msi_via_irqfd_enabled();
 799
 800     nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX);
 801
 802     /* When deassigning, pass a consistent nvqs value
 803      * to avoid leaking notifiers.
 804      */
 805     assert(assign || nvqs == proxy->nvqs_with_notifiers);
 806
 807     proxy->nvqs_with_notifiers = nvqs;
 808
 809     /* Must unset vector notifier while guest notifier is still assigned */
 810     if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
 811         msix_unset_vector_notifiers(&proxy->pci_dev);
 812         if (proxy->vector_irqfd) {
 813             kvm_virtio_pci_vector_release(proxy, nvqs);
 814             g_free(proxy->vector_irqfd);
 815             proxy->vector_irqfd = NULL;
 816         }
 817     }
 818
 819     for (n = 0; n < nvqs; n++) {
 820         if (!virtio_queue_get_num(vdev, n)) {
 821             break;
 822         }
 823
 824         r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
 825         if (r < 0) {
 826             goto assign_error;
 827         }
 828     }
 829
 830     /* Must set vector notifier after guest notifier has been assigned */
 831     if ((with_irqfd || k->guest_notifier_mask) && assign) {
 832         if (with_irqfd) {
 833             proxy->vector_irqfd =
 834                 g_malloc0(sizeof(*proxy->vector_irqfd) *
 835                           msix_nr_vectors_allocated(&proxy->pci_dev));
 836             r = kvm_virtio_pci_vector_use(proxy, nvqs);
 837             if (r < 0) {
 838                 goto assign_error;
 839             }
 840         }
 841         r = msix_set_vector_notifiers(&proxy->pci_dev,
 842                                       virtio_pci_vector_unmask,
 843                                       virtio_pci_vector_mask,
 844                                       virtio_pci_vector_poll);
 845         if (r < 0) {
 846             goto notifiers_error;
 847         }
 848     }
 849
 850     return 0;
 851
 852 notifiers_error:
 853     if (with_irqfd) {
 854         assert(assign);
 855         kvm_virtio_pci_vector_release(proxy, nvqs);
 856     }
 857
 858 assign_error:
 859     /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
 860     assert(assign);
 861     while (--n >= 0) {
 862         virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
 863     }
 864     return r;
 865 }
 866
 867 static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign)
 868 {
 869     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 870
 871     /* Stop using ioeventfd for virtqueue kick if the device starts using host
 872      * notifiers.  This makes it easy to avoid stepping on each others' toes.
 873      */
 874     proxy->ioeventfd_disabled = assign;
 875     if (assign) {
 876         virtio_pci_stop_ioeventfd(proxy);
 877     }
 878     /* We don't need to start here: it's not needed because backend
 879      * currently only stops on status change away from ok,
 880      * reset, vmstop and such. If we do add code to start here,
 881      * need to check vmstate, device state etc. */
 882     return virtio_pci_set_host_notifier_internal(proxy, n, assign, false);
 883 }
 884
 885 static void virtio_pci_vmstate_change(DeviceState *d, bool running)
 886 {
 887     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 888     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 889
 890     if (running) {
 891         /* Try to find out if the guest has bus master disabled, but is
 892            in ready state. Then we have a buggy guest OS. */
 893         if ((vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
 894             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 895             proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
 896         }
 897         virtio_pci_start_ioeventfd(proxy);
 898     } else {
 899         virtio_pci_stop_ioeventfd(proxy);
 900     }
 901 }
 902
 903 #ifdef CONFIG_VIRTFS
 904 static int virtio_9p_init_pci(VirtIOPCIProxy *vpci_dev)
 905 {
 906     V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev);
 907     DeviceState *vdev = DEVICE(&dev->vdev);
 908
 909     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
 910     if (qdev_init(vdev) < 0) {
 911         return -1;
 912     }
 913     return 0;
 914 }
 915
 916 static Property virtio_9p_pci_properties[] = {
 917     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
 918                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
 919     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
 920     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 921     DEFINE_VIRTIO_9P_PROPERTIES(V9fsPCIState, vdev.fsconf),
 922     DEFINE_PROP_END_OF_LIST(),
 923 };
 924
 925 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data)
 926 {
 927     DeviceClass *dc = DEVICE_CLASS(klass);
 928     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 929     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
 930
 931     k->init = virtio_9p_init_pci;
 932     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
 933     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P;
 934     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
 935     pcidev_k->class_id = 0x2;
 936     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 937     dc->props = virtio_9p_pci_properties;
 938 }
 939
 940 static void virtio_9p_pci_instance_init(Object *obj)
 941 {
 942     V9fsPCIState *dev = VIRTIO_9P_PCI(obj);
 943     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_9P);
 944     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 945 }
 946
 947 static const TypeInfo virtio_9p_pci_info = {
 948     .name          = TYPE_VIRTIO_9P_PCI,
 949     .parent        = TYPE_VIRTIO_PCI,
 950     .instance_size = sizeof(V9fsPCIState),
 951     .instance_init = virtio_9p_pci_instance_init,
 952     .class_init    = virtio_9p_pci_class_init,
 953 };
 954 #endif /* CONFIG_VIRTFS */
 955
 956 /*
 957  * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
 958  */
 959
 960 /* This is called by virtio-bus just after the device is plugged. */
 961 static void virtio_pci_device_plugged(DeviceState *d)
 962 {
 963     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
 964     VirtioBusState *bus = &proxy->bus;
 965     uint8_t *config;
 966     uint32_t size;
 967
 968     config = proxy->pci_dev.config;
 969     if (proxy->class_code) {
 970         pci_config_set_class(config, proxy->class_code);
 971     }
 972     pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
 973                  pci_get_word(config + PCI_VENDOR_ID));
 974     pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
 975     config[PCI_INTERRUPT_PIN] = 1;
 976
 977     if (proxy->nvectors &&
 978         msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) {
 979         proxy->nvectors = 0;
 980     }
 981
 982     proxy->pci_dev.config_write = virtio_write_config;
 983
 984     size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
 985          + virtio_bus_get_vdev_config_len(bus);
 986     if (size & (size - 1)) {
 987         size = 1 << qemu_fls(size);
 988     }
 989
 990     memory_region_init_io(&proxy->bar, OBJECT(proxy), &virtio_pci_config_ops,
 991                           proxy, "virtio-pci", size);
 992     pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
 993                      &proxy->bar);
 994
 995     if (!kvm_has_many_ioeventfds()) {
 996         proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
 997     }
 998
 999     proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
1000     proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
1001     proxy->host_features = virtio_bus_get_vdev_features(bus,
1002                                                       proxy->host_features);
1003 }
1004
1005 static void virtio_pci_device_unplugged(DeviceState *d)
1006 {
1007     PCIDevice *pci_dev = PCI_DEVICE(d);
1008     VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1009
1010     virtio_pci_stop_ioeventfd(proxy);
1011     msix_uninit_exclusive_bar(pci_dev);
1012 }
1013
1014 static int virtio_pci_init(PCIDevice *pci_dev)
1015 {
1016     VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev);
1017     VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1018     virtio_pci_bus_new(&dev->bus, sizeof(dev->bus), dev);
1019     if (k->init != NULL) {
1020         return k->init(dev);
1021     }
1022     return 0;
1023 }
1024
1025 static void virtio_pci_exit(PCIDevice *pci_dev)
1026 {
1027     VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1028     memory_region_destroy(&proxy->bar);
1029 }
1030
1031 static void virtio_pci_reset(DeviceState *qdev)
1032 {
1033     VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1034     VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1035     virtio_pci_stop_ioeventfd(proxy);
1036     virtio_bus_reset(bus);
1037     msix_unuse_all_vectors(&proxy->pci_dev);
1038     proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
1039 }
1040
1041 static void virtio_pci_class_init(ObjectClass *klass, void *data)
1042 {
1043     DeviceClass *dc = DEVICE_CLASS(klass);
1044     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1045
1046     k->init = virtio_pci_init;
1047     k->exit = virtio_pci_exit;
1048     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1049     k->revision = VIRTIO_PCI_ABI_VERSION;
1050     k->class_id = PCI_CLASS_OTHERS;
1051     dc->reset = virtio_pci_reset;
1052 }
1053
1054 static const TypeInfo virtio_pci_info = {
1055     .name          = TYPE_VIRTIO_PCI,
1056     .parent        = TYPE_PCI_DEVICE,
1057     .instance_size = sizeof(VirtIOPCIProxy),
1058     .class_init    = virtio_pci_class_init,
1059     .class_size    = sizeof(VirtioPCIClass),
1060     .abstract      = true,
1061 };
1062
1063 /* virtio-blk-pci */
1064
1065 static Property virtio_blk_pci_properties[] = {
1066     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1067     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1068                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1069     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1070 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
1071     DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI, blk.data_plane, 0, false),
1072 #endif
1073     DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
1074     DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI, blk),
1075     DEFINE_PROP_END_OF_LIST(),
1076 };
1077
1078 static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev)
1079 {
1080     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
1081     DeviceState *vdev = DEVICE(&dev->vdev);
1082     virtio_blk_set_conf(vdev, &(dev->blk));
1083     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1084     if (qdev_init(vdev) < 0) {
1085         return -1;
1086     }
1087     return 0;
1088 }
1089
1090 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
1091 {
1092     DeviceClass *dc = DEVICE_CLASS(klass);
1093     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1094     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1095
1096     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1097     dc->props = virtio_blk_pci_properties;
1098     k->init = virtio_blk_pci_init;
1099     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1100     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
1101     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1102     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1103 }
1104
1105 static void virtio_blk_pci_instance_init(Object *obj)
1106 {
1107     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
1108     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK);
1109     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1110 }
1111
1112 static const TypeInfo virtio_blk_pci_info = {
1113     .name          = TYPE_VIRTIO_BLK_PCI,
1114     .parent        = TYPE_VIRTIO_PCI,
1115     .instance_size = sizeof(VirtIOBlkPCI),
1116     .instance_init = virtio_blk_pci_instance_init,
1117     .class_init    = virtio_blk_pci_class_init,
1118 };
1119
1120 /* virtio-scsi-pci */
1121
1122 static Property virtio_scsi_pci_properties[] = {
1123     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1124                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1125     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1126                        DEV_NVECTORS_UNSPECIFIED),
1127     DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features),
1128     DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI, vdev.parent_obj.conf),
1129     DEFINE_PROP_END_OF_LIST(),
1130 };
1131
1132 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev)
1133 {
1134     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
1135     DeviceState *vdev = DEVICE(&dev->vdev);
1136     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1137     DeviceState *proxy = DEVICE(vpci_dev);
1138     char *bus_name;
1139
1140     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1141         vpci_dev->nvectors = vs->conf.num_queues + 3;
1142     }
1143
1144     /*
1145      * For command line compatibility, this sets the virtio-scsi-device bus
1146      * name as before.
1147      */
1148     if (proxy->id) {
1149         bus_name = g_strdup_printf("%s.0", proxy->id);
1150         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1151         g_free(bus_name);
1152     }
1153
1154     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1155     if (qdev_init(vdev) < 0) {
1156         return -1;
1157     }
1158     return 0;
1159 }
1160
1161 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
1162 {
1163     DeviceClass *dc = DEVICE_CLASS(klass);
1164     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1165     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1166     k->init = virtio_scsi_pci_init_pci;
1167     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1168     dc->props = virtio_scsi_pci_properties;
1169     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1170     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1171     pcidev_k->revision = 0x00;
1172     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1173 }
1174
1175 static void virtio_scsi_pci_instance_init(Object *obj)
1176 {
1177     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
1178     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI);
1179     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1180 }
1181
1182 static const TypeInfo virtio_scsi_pci_info = {
1183     .name          = TYPE_VIRTIO_SCSI_PCI,
1184     .parent        = TYPE_VIRTIO_PCI,
1185     .instance_size = sizeof(VirtIOSCSIPCI),
1186     .instance_init = virtio_scsi_pci_instance_init,
1187     .class_init    = virtio_scsi_pci_class_init,
1188 };
1189
1190 /* vhost-scsi-pci */
1191
1192 #ifdef CONFIG_VHOST_SCSI
1193 static Property vhost_scsi_pci_properties[] = {
1194     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1195                        DEV_NVECTORS_UNSPECIFIED),
1196     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1197     DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSIPCI, vdev.parent_obj.conf),
1198     DEFINE_PROP_END_OF_LIST(),
1199 };
1200
1201 static int vhost_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev)
1202 {
1203     VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
1204     DeviceState *vdev = DEVICE(&dev->vdev);
1205     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1206
1207     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1208         vpci_dev->nvectors = vs->conf.num_queues + 3;
1209     }
1210
1211     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1212     if (qdev_init(vdev) < 0) {
1213         return -1;
1214     }
1215     return 0;
1216 }
1217
1218 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
1219 {
1220     DeviceClass *dc = DEVICE_CLASS(klass);
1221     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1222     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1223     k->init = vhost_scsi_pci_init_pci;
1224     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1225     dc->props = vhost_scsi_pci_properties;
1226     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1227     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1228     pcidev_k->revision = 0x00;
1229     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1230 }
1231
1232 static void vhost_scsi_pci_instance_init(Object *obj)
1233 {
1234     VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
1235     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI);
1236     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1237 }
1238
1239 static const TypeInfo vhost_scsi_pci_info = {
1240     .name          = TYPE_VHOST_SCSI_PCI,
1241     .parent        = TYPE_VIRTIO_PCI,
1242     .instance_size = sizeof(VHostSCSIPCI),
1243     .instance_init = vhost_scsi_pci_instance_init,
1244     .class_init    = vhost_scsi_pci_class_init,
1245 };
1246 #endif
1247
1248 /* virtio-balloon-pci */
1249
1250 static void balloon_pci_stats_get_all(Object *obj, struct Visitor *v,
1251                                       void *opaque, const char *name,
1252                                       Error **errp)
1253 {
1254     VirtIOBalloonPCI *dev = opaque;
1255     object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp);
1256 }
1257
1258 static void balloon_pci_stats_get_poll_interval(Object *obj, struct Visitor *v,
1259                                                 void *opaque, const char *name,
1260                                                 Error **errp)
1261 {
1262     VirtIOBalloonPCI *dev = opaque;
1263     object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
1264                         errp);
1265 }
1266
1267 static void balloon_pci_stats_set_poll_interval(Object *obj, struct Visitor *v,
1268                                                 void *opaque, const char *name,
1269                                                 Error **errp)
1270 {
1271     VirtIOBalloonPCI *dev = opaque;
1272     object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
1273                         errp);
1274 }
1275
1276 static Property virtio_balloon_pci_properties[] = {
1277     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1278     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1279     DEFINE_PROP_END_OF_LIST(),
1280 };
1281
1282 static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev)
1283 {
1284     VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev);
1285     DeviceState *vdev = DEVICE(&dev->vdev);
1286
1287     if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
1288         vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
1289         vpci_dev->class_code = PCI_CLASS_OTHERS;
1290     }
1291
1292     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1293     if (qdev_init(vdev) < 0) {
1294         return -1;
1295     }
1296     return 0;
1297 }
1298
1299 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
1300 {
1301     DeviceClass *dc = DEVICE_CLASS(klass);
1302     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1303     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1304     k->init = virtio_balloon_pci_init;
1305     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1306     dc->props = virtio_balloon_pci_properties;
1307     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1308     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
1309     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1310     pcidev_k->class_id = PCI_CLASS_OTHERS;
1311 }
1312
1313 static void virtio_balloon_pci_instance_init(Object *obj)
1314 {
1315     VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
1316     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON);
1317     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1318
1319     object_property_add(obj, "guest-stats", "guest statistics",
1320                         balloon_pci_stats_get_all, NULL, NULL, dev,
1321                         NULL);
1322
1323     object_property_add(obj, "guest-stats-polling-interval", "int",
1324                         balloon_pci_stats_get_poll_interval,
1325                         balloon_pci_stats_set_poll_interval,
1326                         NULL, dev, NULL);
1327 }
1328
1329 static const TypeInfo virtio_balloon_pci_info = {
1330     .name          = TYPE_VIRTIO_BALLOON_PCI,
1331     .parent        = TYPE_VIRTIO_PCI,
1332     .instance_size = sizeof(VirtIOBalloonPCI),
1333     .instance_init = virtio_balloon_pci_instance_init,
1334     .class_init    = virtio_balloon_pci_class_init,
1335 };
1336
1337 /* virtio-serial-pci */
1338
1339 static int virtio_serial_pci_init(VirtIOPCIProxy *vpci_dev)
1340 {
1341     VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
1342     DeviceState *vdev = DEVICE(&dev->vdev);
1343     DeviceState *proxy = DEVICE(vpci_dev);
1344     char *bus_name;
1345
1346     if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
1347         vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
1348         vpci_dev->class_code != PCI_CLASS_OTHERS) {        /* qemu-kvm  */
1349             vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
1350     }
1351
1352     /* backwards-compatibility with machines that were created with
1353        DEV_NVECTORS_UNSPECIFIED */
1354     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1355         vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
1356     }
1357
1358     /*
1359      * For command line compatibility, this sets the virtio-serial-device bus
1360      * name as before.
1361      */
1362     if (proxy->id) {
1363         bus_name = g_strdup_printf("%s.0", proxy->id);
1364         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1365         g_free(bus_name);
1366     }
1367
1368     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1369     if (qdev_init(vdev) < 0) {
1370         return -1;
1371     }
1372     return 0;
1373 }
1374
1375 static Property virtio_serial_pci_properties[] = {
1376     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1377                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1378     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1379     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1380     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1381     DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtIOSerialPCI, vdev.serial),
1382     DEFINE_PROP_END_OF_LIST(),
1383 };
1384
1385 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
1386 {
1387     DeviceClass *dc = DEVICE_CLASS(klass);
1388     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1389     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1390     k->init = virtio_serial_pci_init;
1391     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
1392     dc->props = virtio_serial_pci_properties;
1393     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1394     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
1395     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1396     pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
1397 }
1398
1399 static void virtio_serial_pci_instance_init(Object *obj)
1400 {
1401     VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
1402     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL);
1403     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1404 }
1405
1406 static const TypeInfo virtio_serial_pci_info = {
1407     .name          = TYPE_VIRTIO_SERIAL_PCI,
1408     .parent        = TYPE_VIRTIO_PCI,
1409     .instance_size = sizeof(VirtIOSerialPCI),
1410     .instance_init = virtio_serial_pci_instance_init,
1411     .class_init    = virtio_serial_pci_class_init,
1412 };
1413
1414 /* virtio-net-pci */
1415
1416 static Property virtio_net_properties[] = {
1417     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1418                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
1419     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
1420     DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
1421     DEFINE_NIC_PROPERTIES(VirtIONetPCI, vdev.nic_conf),
1422     DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetPCI, vdev.net_conf),
1423     DEFINE_PROP_END_OF_LIST(),
1424 };
1425
1426 static int virtio_net_pci_init(VirtIOPCIProxy *vpci_dev)
1427 {
1428     DeviceState *qdev = DEVICE(vpci_dev);
1429     VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
1430     DeviceState *vdev = DEVICE(&dev->vdev);
1431
1432     virtio_net_set_config_size(&dev->vdev, vpci_dev->host_features);
1433     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
1434                                   object_get_typename(OBJECT(qdev)));
1435     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1436     if (qdev_init(vdev) < 0) {
1437         return -1;
1438     }
1439     return 0;
1440 }
1441
1442 static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
1443 {
1444     DeviceClass *dc = DEVICE_CLASS(klass);
1445     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1446     VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1447
1448     k->romfile = "efi-virtio.rom";
1449     k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1450     k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
1451     k->revision = VIRTIO_PCI_ABI_VERSION;
1452     k->class_id = PCI_CLASS_NETWORK_ETHERNET;
1453     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1454     dc->props = virtio_net_properties;
1455     vpciklass->init = virtio_net_pci_init;
1456 }
1457
1458 static void virtio_net_pci_instance_init(Object *obj)
1459 {
1460     VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
1461     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET);
1462     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1463 }
1464
1465 static const TypeInfo virtio_net_pci_info = {
1466     .name          = TYPE_VIRTIO_NET_PCI,
1467     .parent        = TYPE_VIRTIO_PCI,
1468     .instance_size = sizeof(VirtIONetPCI),
1469     .instance_init = virtio_net_pci_instance_init,
1470     .class_init    = virtio_net_pci_class_init,
1471 };
1472
1473 /* virtio-rng-pci */
1474
1475 static Property virtio_rng_pci_properties[] = {
1476     DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1477     DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORngPCI, vdev.conf),
1478     DEFINE_PROP_END_OF_LIST(),
1479 };
1480
1481 static int virtio_rng_pci_init(VirtIOPCIProxy *vpci_dev)
1482 {
1483     VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
1484     DeviceState *vdev = DEVICE(&vrng->vdev);
1485
1486     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1487     if (qdev_init(vdev) < 0) {
1488         return -1;
1489     }
1490
1491     object_property_set_link(OBJECT(vrng),
1492                              OBJECT(vrng->vdev.conf.rng), "rng",
1493                              NULL);
1494
1495     return 0;
1496 }
1497
1498 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
1499 {
1500     DeviceClass *dc = DEVICE_CLASS(klass);
1501     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1502     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1503
1504     k->init = virtio_rng_pci_init;
1505     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1506     dc->props = virtio_rng_pci_properties;
1507
1508     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1509     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
1510     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1511     pcidev_k->class_id = PCI_CLASS_OTHERS;
1512 }
1513
1514 static void virtio_rng_initfn(Object *obj)
1515 {
1516     VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
1517     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG);
1518     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1519     object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
1520                              (Object **)&dev->vdev.conf.rng, NULL);
1521
1522 }
1523
1524 static const TypeInfo virtio_rng_pci_info = {
1525     .name          = TYPE_VIRTIO_RNG_PCI,
1526     .parent        = TYPE_VIRTIO_PCI,
1527     .instance_size = sizeof(VirtIORngPCI),
1528     .instance_init = virtio_rng_initfn,
1529     .class_init    = virtio_rng_pci_class_init,
1530 };
1531
1532 /* virtio-pci-bus */
1533
1534 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
1535                                VirtIOPCIProxy *dev)
1536 {
1537     DeviceState *qdev = DEVICE(dev);
1538     BusState *qbus;
1539     char virtio_bus_name[] = "virtio-bus";
1540
1541     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
1542                         virtio_bus_name);
1543     qbus = BUS(bus);
1544     qbus->allow_hotplug = 1;
1545 }
1546
1547 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
1548 {
1549     BusClass *bus_class = BUS_CLASS(klass);
1550     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1551     bus_class->max_dev = 1;
1552     k->notify = virtio_pci_notify;
1553     k->save_config = virtio_pci_save_config;
1554     k->load_config = virtio_pci_load_config;
1555     k->save_queue = virtio_pci_save_queue;
1556     k->load_queue = virtio_pci_load_queue;
1557     k->get_features = virtio_pci_get_features;
1558     k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
1559     k->set_host_notifier = virtio_pci_set_host_notifier;
1560     k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
1561     k->vmstate_change = virtio_pci_vmstate_change;
1562     k->device_plugged = virtio_pci_device_plugged;
1563     k->device_unplugged = virtio_pci_device_unplugged;
1564 }
1565
1566 static const TypeInfo virtio_pci_bus_info = {
1567     .name          = TYPE_VIRTIO_PCI_BUS,
1568     .parent        = TYPE_VIRTIO_BUS,
1569     .instance_size = sizeof(VirtioPCIBusState),
1570     .class_init    = virtio_pci_bus_class_init,
1571 };
1572
1573 static void virtio_pci_register_types(void)
1574 {
1575     type_register_static(&virtio_rng_pci_info);
1576     type_register_static(&virtio_pci_bus_info);
1577     type_register_static(&virtio_pci_info);
1578 #ifdef CONFIG_VIRTFS
1579     type_register_static(&virtio_9p_pci_info);
1580 #endif
1581     type_register_static(&virtio_blk_pci_info);
1582     type_register_static(&virtio_scsi_pci_info);
1583     type_register_static(&virtio_balloon_pci_info);
1584     type_register_static(&virtio_serial_pci_info);
1585     type_register_static(&virtio_net_pci_info);
1586 #ifdef CONFIG_VHOST_SCSI
1587     type_register_static(&vhost_scsi_pci_info);
1588 #endif
1589 }
1590
1591 type_init(virtio_pci_register_types)