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
  28 /* from Linux's linux/virtio_pci.h */
  29
  30 /* A 32-bit r/o bitmask of the features supported by the host */
  31 #define VIRTIO_PCI_HOST_FEATURES        0
  32
  33 /* A 32-bit r/w bitmask of features activated by the guest */
  34 #define VIRTIO_PCI_GUEST_FEATURES       4
  35
  36 /* A 32-bit r/w PFN for the currently selected queue */
  37 #define VIRTIO_PCI_QUEUE_PFN            8
  38
  39 /* A 16-bit r/o queue size for the currently selected queue */
  40 #define VIRTIO_PCI_QUEUE_NUM            12
  41
  42 /* A 16-bit r/w queue selector */
  43 #define VIRTIO_PCI_QUEUE_SEL            14
  44
  45 /* A 16-bit r/w queue notifier */
  46 #define VIRTIO_PCI_QUEUE_NOTIFY         16
  47
  48 /* An 8-bit device status register.  */
  49 #define VIRTIO_PCI_STATUS               18
  50
  51 /* An 8-bit r/o interrupt status register.  Reading the value will return the
  52  * current contents of the ISR and will also clear it.  This is effectively
  53  * a read-and-acknowledge. */
  54 #define VIRTIO_PCI_ISR                  19
  55
  56 /* MSI-X registers: only enabled if MSI-X is enabled. */
  57 /* A 16-bit vector for configuration changes. */
  58 #define VIRTIO_MSI_CONFIG_VECTOR        20
  59 /* A 16-bit vector for selected queue notifications. */
  60 #define VIRTIO_MSI_QUEUE_VECTOR         22
  61
  62 /* Config space size */
  63 #define VIRTIO_PCI_CONFIG_NOMSI         20
  64 #define VIRTIO_PCI_CONFIG_MSI           24
  65 #define VIRTIO_PCI_REGION_SIZE(dev)     (msix_present(dev) ? \
  66                                          VIRTIO_PCI_CONFIG_MSI : \
  67                                          VIRTIO_PCI_CONFIG_NOMSI)
  68
  69 /* The remaining space is defined by each driver as the per-driver
  70  * configuration space */
  71 #define VIRTIO_PCI_CONFIG(dev)          (msix_enabled(dev) ? \
  72                                          VIRTIO_PCI_CONFIG_MSI : \
  73                                          VIRTIO_PCI_CONFIG_NOMSI)
  74
  75 /* Virtio ABI version, if we increment this, we break the guest driver. */
  76 #define VIRTIO_PCI_ABI_VERSION          0
  77
  78 /* How many bits to shift physical queue address written to QUEUE_PFN.
  79  * 12 is historical, and due to x86 page size. */
  80 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT    12
  81
  82 /* We can catch some guest bugs inside here so we continue supporting older
  83    guests. */
  84 #define VIRTIO_PCI_BUG_BUS_MASTER       (1 << 0)
  85
  86 /* QEMU doesn't strictly need write barriers since everything runs in
  87  * lock-step.  We'll leave the calls to wmb() in though to make it obvious for
  88  * KVM or if kqemu gets SMP support.
  89  */
  90 #define wmb() do { } while (0)
  91
  92 /* PCI bindings.  */
  93
  94 typedef struct {
  95     PCIDevice pci_dev;
  96     VirtIODevice *vdev;
  97     uint32_t bugs;
  98     uint32_t addr;
  99     uint32_t class_code;
 100     uint32_t nvectors;
 101     BlockConf block;
 102     NICConf nic;
 103     uint32_t host_features;
 104 #ifdef CONFIG_LINUX
 105     V9fsConf fsconf;
 106 #endif
 107     /* Max. number of ports we can have for a the virtio-serial device */
 108     uint32_t max_virtserial_ports;
 109 } VirtIOPCIProxy;
 110
 111 /* virtio device */
 112
 113 static void virtio_pci_notify(void *opaque, uint16_t vector)
 114 {
 115     VirtIOPCIProxy *proxy = opaque;
 116     if (msix_enabled(&proxy->pci_dev))
 117         msix_notify(&proxy->pci_dev, vector);
 118     else
 119         qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1);
 120 }
 121
 122 static void virtio_pci_save_config(void * opaque, QEMUFile *f)
 123 {
 124     VirtIOPCIProxy *proxy = opaque;
 125     pci_device_save(&proxy->pci_dev, f);
 126     msix_save(&proxy->pci_dev, f);
 127     if (msix_present(&proxy->pci_dev))
 128         qemu_put_be16(f, proxy->vdev->config_vector);
 129 }
 130
 131 static void virtio_pci_save_queue(void * opaque, int n, QEMUFile *f)
 132 {
 133     VirtIOPCIProxy *proxy = opaque;
 134     if (msix_present(&proxy->pci_dev))
 135         qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n));
 136 }
 137
 138 static int virtio_pci_load_config(void * opaque, QEMUFile *f)
 139 {
 140     VirtIOPCIProxy *proxy = opaque;
 141     int ret;
 142     ret = pci_device_load(&proxy->pci_dev, f);
 143     if (ret) {
 144         return ret;
 145     }
 146     msix_load(&proxy->pci_dev, f);
 147     if (msix_present(&proxy->pci_dev)) {
 148         qemu_get_be16s(f, &proxy->vdev->config_vector);
 149     } else {
 150         proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
 151     }
 152     if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
 153         return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
 154     }
 155
 156     /* Try to find out if the guest has bus master disabled, but is
 157        in ready state. Then we have a buggy guest OS. */
 158     if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
 159         !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 160         proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER;
 161     }
 162     return 0;
 163 }
 164
 165 static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f)
 166 {
 167     VirtIOPCIProxy *proxy = opaque;
 168     uint16_t vector;
 169     if (msix_present(&proxy->pci_dev)) {
 170         qemu_get_be16s(f, &vector);
 171     } else {
 172         vector = VIRTIO_NO_VECTOR;
 173     }
 174     virtio_queue_set_vector(proxy->vdev, n, vector);
 175     if (vector != VIRTIO_NO_VECTOR) {
 176         return msix_vector_use(&proxy->pci_dev, vector);
 177     }
 178     return 0;
 179 }
 180
 181 static void virtio_pci_reset(DeviceState *d)
 182 {
 183     VirtIOPCIProxy *proxy = container_of(d, VirtIOPCIProxy, pci_dev.qdev);
 184     virtio_reset(proxy->vdev);
 185     msix_reset(&proxy->pci_dev);
 186     proxy->bugs = 0;
 187 }
 188
 189 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 190 {
 191     VirtIOPCIProxy *proxy = opaque;
 192     VirtIODevice *vdev = proxy->vdev;
 193     target_phys_addr_t pa;
 194
 195     switch (addr) {
 196     case VIRTIO_PCI_GUEST_FEATURES:
 197         /* Guest does not negotiate properly?  We have to assume nothing. */
 198         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
 199             if (vdev->bad_features)
 200                 val = proxy->host_features & vdev->bad_features(vdev);
 201             else
 202                 val = 0;
 203         }
 204         if (vdev->set_features)
 205             vdev->set_features(vdev, val);
 206         vdev->guest_features = val;
 207         break;
 208     case VIRTIO_PCI_QUEUE_PFN:
 209         pa = (target_phys_addr_t)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 210         if (pa == 0) {
 211             virtio_reset(proxy->vdev);
 212             msix_unuse_all_vectors(&proxy->pci_dev);
 213         }
 214         else
 215             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
 216         break;
 217     case VIRTIO_PCI_QUEUE_SEL:
 218         if (val < VIRTIO_PCI_QUEUE_MAX)
 219             vdev->queue_sel = val;
 220         break;
 221     case VIRTIO_PCI_QUEUE_NOTIFY:
 222         virtio_queue_notify(vdev, val);
 223         break;
 224     case VIRTIO_PCI_STATUS:
 225         virtio_set_status(vdev, val & 0xFF);
 226         if (vdev->status == 0) {
 227             virtio_reset(proxy->vdev);
 228             msix_unuse_all_vectors(&proxy->pci_dev);
 229         }
 230
 231         /* Linux before 2.6.34 sets the device as OK without enabling
 232            the PCI device bus master bit. In this case we need to disable
 233            some safety checks. */
 234         if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
 235             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 236             proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER;
 237         }
 238         break;
 239     case VIRTIO_MSI_CONFIG_VECTOR:
 240         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
 241         /* Make it possible for guest to discover an error took place. */
 242         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 243             val = VIRTIO_NO_VECTOR;
 244         vdev->config_vector = val;
 245         break;
 246     case VIRTIO_MSI_QUEUE_VECTOR:
 247         msix_vector_unuse(&proxy->pci_dev,
 248                           virtio_queue_vector(vdev, vdev->queue_sel));
 249         /* Make it possible for guest to discover an error took place. */
 250         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 251             val = VIRTIO_NO_VECTOR;
 252         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
 253         break;
 254     default:
 255         fprintf(stderr, "%s: unexpected address 0x%x value 0x%x\n",
 256                 __func__, addr, val);
 257         break;
 258     }
 259 }
 260
 261 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
 262 {
 263     VirtIODevice *vdev = proxy->vdev;
 264     uint32_t ret = 0xFFFFFFFF;
 265
 266     switch (addr) {
 267     case VIRTIO_PCI_HOST_FEATURES:
 268         ret = proxy->host_features;
 269         break;
 270     case VIRTIO_PCI_GUEST_FEATURES:
 271         ret = vdev->guest_features;
 272         break;
 273     case VIRTIO_PCI_QUEUE_PFN:
 274         ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
 275               >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 276         break;
 277     case VIRTIO_PCI_QUEUE_NUM:
 278         ret = virtio_queue_get_num(vdev, vdev->queue_sel);
 279         break;
 280     case VIRTIO_PCI_QUEUE_SEL:
 281         ret = vdev->queue_sel;
 282         break;
 283     case VIRTIO_PCI_STATUS:
 284         ret = vdev->status;
 285         break;
 286     case VIRTIO_PCI_ISR:
 287         /* reading from the ISR also clears it. */
 288         ret = vdev->isr;
 289         vdev->isr = 0;
 290         qemu_set_irq(proxy->pci_dev.irq[0], 0);
 291         break;
 292     case VIRTIO_MSI_CONFIG_VECTOR:
 293         ret = vdev->config_vector;
 294         break;
 295     case VIRTIO_MSI_QUEUE_VECTOR:
 296         ret = virtio_queue_vector(vdev, vdev->queue_sel);
 297         break;
 298     default:
 299         break;
 300     }
 301
 302     return ret;
 303 }
 304
 305 static uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr)
 306 {
 307     VirtIOPCIProxy *proxy = opaque;
 308     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 309     addr -= proxy->addr;
 310     if (addr < config)
 311         return virtio_ioport_read(proxy, addr);
 312     addr -= config;
 313     return virtio_config_readb(proxy->vdev, addr);
 314 }
 315
 316 static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr)
 317 {
 318     VirtIOPCIProxy *proxy = opaque;
 319     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 320     addr -= proxy->addr;
 321     if (addr < config)
 322         return virtio_ioport_read(proxy, addr);
 323     addr -= config;
 324     return virtio_config_readw(proxy->vdev, addr);
 325 }
 326
 327 static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr)
 328 {
 329     VirtIOPCIProxy *proxy = opaque;
 330     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 331     addr -= proxy->addr;
 332     if (addr < config)
 333         return virtio_ioport_read(proxy, addr);
 334     addr -= config;
 335     return virtio_config_readl(proxy->vdev, addr);
 336 }
 337
 338 static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val)
 339 {
 340     VirtIOPCIProxy *proxy = opaque;
 341     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 342     addr -= proxy->addr;
 343     if (addr < config) {
 344         virtio_ioport_write(proxy, addr, val);
 345         return;
 346     }
 347     addr -= config;
 348     virtio_config_writeb(proxy->vdev, addr, val);
 349 }
 350
 351 static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val)
 352 {
 353     VirtIOPCIProxy *proxy = opaque;
 354     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 355     addr -= proxy->addr;
 356     if (addr < config) {
 357         virtio_ioport_write(proxy, addr, val);
 358         return;
 359     }
 360     addr -= config;
 361     virtio_config_writew(proxy->vdev, addr, val);
 362 }
 363
 364 static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
 365 {
 366     VirtIOPCIProxy *proxy = opaque;
 367     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 368     addr -= proxy->addr;
 369     if (addr < config) {
 370         virtio_ioport_write(proxy, addr, val);
 371         return;
 372     }
 373     addr -= config;
 374     virtio_config_writel(proxy->vdev, addr, val);
 375 }
 376
 377 static void virtio_map(PCIDevice *pci_dev, int region_num,
 378                        pcibus_t addr, pcibus_t size, int type)
 379 {
 380     VirtIOPCIProxy *proxy = container_of(pci_dev, VirtIOPCIProxy, pci_dev);
 381     VirtIODevice *vdev = proxy->vdev;
 382     unsigned config_len = VIRTIO_PCI_REGION_SIZE(pci_dev) + vdev->config_len;
 383
 384     proxy->addr = addr;
 385
 386     register_ioport_write(addr, config_len, 1, virtio_pci_config_writeb, proxy);
 387     register_ioport_write(addr, config_len, 2, virtio_pci_config_writew, proxy);
 388     register_ioport_write(addr, config_len, 4, virtio_pci_config_writel, proxy);
 389     register_ioport_read(addr, config_len, 1, virtio_pci_config_readb, proxy);
 390     register_ioport_read(addr, config_len, 2, virtio_pci_config_readw, proxy);
 391     register_ioport_read(addr, config_len, 4, virtio_pci_config_readl, proxy);
 392
 393     if (vdev->config_len)
 394         vdev->get_config(vdev, vdev->config);
 395 }
 396
 397 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 398                                 uint32_t val, int len)
 399 {
 400     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 401
 402     if (PCI_COMMAND == address) {
 403         if (!(val & PCI_COMMAND_MASTER)) {
 404             if (!(proxy->bugs & VIRTIO_PCI_BUG_BUS_MASTER)) {
 405                 virtio_set_status(proxy->vdev,
 406                                   proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
 407             }
 408         }
 409     }
 410
 411     pci_default_write_config(pci_dev, address, val, len);
 412     msix_write_config(pci_dev, address, val, len);
 413 }
 414
 415 static unsigned virtio_pci_get_features(void *opaque)
 416 {
 417     VirtIOPCIProxy *proxy = opaque;
 418     return proxy->host_features;
 419 }
 420
 421 static void virtio_pci_guest_notifier_read(void *opaque)
 422 {
 423     VirtQueue *vq = opaque;
 424     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 425     if (event_notifier_test_and_clear(n)) {
 426         virtio_irq(vq);
 427     }
 428 }
 429
 430 static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign)
 431 {
 432     VirtIOPCIProxy *proxy = opaque;
 433     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 434     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 435
 436     if (assign) {
 437         int r = event_notifier_init(notifier, 0);
 438         if (r < 0) {
 439             return r;
 440         }
 441         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 442                             virtio_pci_guest_notifier_read, NULL, vq);
 443     } else {
 444         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 445                             NULL, NULL, NULL);
 446         event_notifier_cleanup(notifier);
 447     }
 448
 449     return 0;
 450 }
 451
 452 static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign)
 453 {
 454     VirtIOPCIProxy *proxy = opaque;
 455     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 456     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
 457     int r;
 458     if (assign) {
 459         r = event_notifier_init(notifier, 1);
 460         if (r < 0) {
 461             return r;
 462         }
 463         r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
 464                                        proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
 465                                        n, assign);
 466         if (r < 0) {
 467             event_notifier_cleanup(notifier);
 468         }
 469     } else {
 470         r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
 471                                        proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
 472                                        n, assign);
 473         if (r < 0) {
 474             return r;
 475         }
 476         event_notifier_cleanup(notifier);
 477     }
 478     return r;
 479 }
 480
 481 static const VirtIOBindings virtio_pci_bindings = {
 482     .notify = virtio_pci_notify,
 483     .save_config = virtio_pci_save_config,
 484     .load_config = virtio_pci_load_config,
 485     .save_queue = virtio_pci_save_queue,
 486     .load_queue = virtio_pci_load_queue,
 487     .get_features = virtio_pci_get_features,
 488     .set_host_notifier = virtio_pci_set_host_notifier,
 489     .set_guest_notifier = virtio_pci_set_guest_notifier,
 490 };
 491
 492 static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev,
 493                             uint16_t vendor, uint16_t device,
 494                             uint16_t class_code, uint8_t pif)
 495 {
 496     uint8_t *config;
 497     uint32_t size;
 498
 499     proxy->vdev = vdev;
 500
 501     config = proxy->pci_dev.config;
 502     pci_config_set_vendor_id(config, vendor);
 503     pci_config_set_device_id(config, device);
 504
 505     config[0x08] = VIRTIO_PCI_ABI_VERSION;
 506
 507     config[0x09] = pif;
 508     pci_config_set_class(config, class_code);
 509     config[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL;
 510
 511     config[0x2c] = vendor & 0xFF;
 512     config[0x2d] = (vendor >> 8) & 0xFF;
 513     config[0x2e] = vdev->device_id & 0xFF;
 514     config[0x2f] = (vdev->device_id >> 8) & 0xFF;
 515
 516     config[0x3d] = 1;
 517
 518     if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors, 1, 0)) {
 519         pci_register_bar(&proxy->pci_dev, 1,
 520                          msix_bar_size(&proxy->pci_dev),
 521                          PCI_BASE_ADDRESS_SPACE_MEMORY,
 522                          msix_mmio_map);
 523     } else
 524         vdev->nvectors = 0;
 525
 526     proxy->pci_dev.config_write = virtio_write_config;
 527
 528     size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len;
 529     if (size & (size-1))
 530         size = 1 << qemu_fls(size);
 531
 532     pci_register_bar(&proxy->pci_dev, 0, size, PCI_BASE_ADDRESS_SPACE_IO,
 533                            virtio_map);
 534
 535     virtio_bind_device(vdev, &virtio_pci_bindings, proxy);
 536     proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 537     proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
 538     proxy->host_features = vdev->get_features(vdev, proxy->host_features);
 539 }
 540
 541 static int virtio_blk_init_pci(PCIDevice *pci_dev)
 542 {
 543     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 544     VirtIODevice *vdev;
 545
 546     if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
 547         proxy->class_code != PCI_CLASS_STORAGE_OTHER)
 548         proxy->class_code = PCI_CLASS_STORAGE_SCSI;
 549
 550     if (!proxy->block.dinfo) {
 551         error_report("virtio-blk-pci: drive property not set");
 552         return -1;
 553     }
 554     vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block);
 555     vdev->nvectors = proxy->nvectors;
 556     virtio_init_pci(proxy, vdev,
 557                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 558                     PCI_DEVICE_ID_VIRTIO_BLOCK,
 559                     proxy->class_code, 0x00);
 560     /* make the actual value visible */
 561     proxy->nvectors = vdev->nvectors;
 562     return 0;
 563 }
 564
 565 static int virtio_exit_pci(PCIDevice *pci_dev)
 566 {
 567     return msix_uninit(pci_dev);
 568 }
 569
 570 static int virtio_blk_exit_pci(PCIDevice *pci_dev)
 571 {
 572     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 573
 574     drive_uninit(proxy->block.dinfo);
 575     return virtio_exit_pci(pci_dev);
 576 }
 577
 578 static int virtio_serial_init_pci(PCIDevice *pci_dev)
 579 {
 580     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 581     VirtIODevice *vdev;
 582
 583     if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
 584         proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
 585         proxy->class_code != PCI_CLASS_OTHERS)          /* qemu-kvm  */
 586         proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER;
 587
 588     vdev = virtio_serial_init(&pci_dev->qdev, proxy->max_virtserial_ports);
 589     if (!vdev) {
 590         return -1;
 591     }
 592     vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
 593                                         ? proxy->max_virtserial_ports + 1
 594                                         : proxy->nvectors;
 595     virtio_init_pci(proxy, vdev,
 596                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 597                     PCI_DEVICE_ID_VIRTIO_CONSOLE,
 598                     proxy->class_code, 0x00);
 599     proxy->nvectors = vdev->nvectors;
 600     return 0;
 601 }
 602
 603 static int virtio_net_init_pci(PCIDevice *pci_dev)
 604 {
 605     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 606     VirtIODevice *vdev;
 607
 608     vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic);
 609
 610     vdev->nvectors = proxy->nvectors;
 611     virtio_init_pci(proxy, vdev,
 612                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 613                     PCI_DEVICE_ID_VIRTIO_NET,
 614                     PCI_CLASS_NETWORK_ETHERNET,
 615                     0x00);
 616
 617     /* make the actual value visible */
 618     proxy->nvectors = vdev->nvectors;
 619     return 0;
 620 }
 621
 622 static int virtio_net_exit_pci(PCIDevice *pci_dev)
 623 {
 624     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 625
 626     virtio_net_exit(proxy->vdev);
 627     return virtio_exit_pci(pci_dev);
 628 }
 629
 630 static int virtio_balloon_init_pci(PCIDevice *pci_dev)
 631 {
 632     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 633     VirtIODevice *vdev;
 634
 635     vdev = virtio_balloon_init(&pci_dev->qdev);
 636     virtio_init_pci(proxy, vdev,
 637                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 638                     PCI_DEVICE_ID_VIRTIO_BALLOON,
 639                     PCI_CLASS_MEMORY_RAM,
 640                     0x00);
 641     return 0;
 642 }
 643
 644 #ifdef CONFIG_VIRTFS
 645 static int virtio_9p_init_pci(PCIDevice *pci_dev)
 646 {
 647     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 648     VirtIODevice *vdev;
 649
 650     vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
 651     virtio_init_pci(proxy, vdev,
 652                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 653                     0x1009,
 654                     0x2,
 655                     0x00);
 656
 657     return 0;
 658 }
 659 #endif
 660
 661 static PCIDeviceInfo virtio_info[] = {
 662     {
 663         .qdev.name = "virtio-blk-pci",
 664         .qdev.size = sizeof(VirtIOPCIProxy),
 665         .init      = virtio_blk_init_pci,
 666         .exit      = virtio_blk_exit_pci,
 667         .qdev.props = (Property[]) {
 668             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
 669             DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block),
 670             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
 671             DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
 672             DEFINE_PROP_END_OF_LIST(),
 673         },
 674         .qdev.reset = virtio_pci_reset,
 675     },{
 676         .qdev.name  = "virtio-net-pci",
 677         .qdev.size  = sizeof(VirtIOPCIProxy),
 678         .init       = virtio_net_init_pci,
 679         .exit       = virtio_net_exit_pci,
 680         .romfile    = "pxe-virtio.bin",
 681         .qdev.props = (Property[]) {
 682             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
 683             DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
 684             DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic),
 685             DEFINE_PROP_END_OF_LIST(),
 686         },
 687         .qdev.reset = virtio_pci_reset,
 688     },{
 689         .qdev.name = "virtio-serial-pci",
 690         .qdev.alias = "virtio-serial",
 691         .qdev.size = sizeof(VirtIOPCIProxy),
 692         .init      = virtio_serial_init_pci,
 693         .exit      = virtio_exit_pci,
 694         .qdev.props = (Property[]) {
 695             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
 696                                DEV_NVECTORS_UNSPECIFIED),
 697             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
 698             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 699             DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, max_virtserial_ports,
 700                                31),
 701             DEFINE_PROP_END_OF_LIST(),
 702         },
 703         .qdev.reset = virtio_pci_reset,
 704     },{
 705         .qdev.name = "virtio-balloon-pci",
 706         .qdev.size = sizeof(VirtIOPCIProxy),
 707         .init      = virtio_balloon_init_pci,
 708         .exit      = virtio_exit_pci,
 709         .qdev.props = (Property[]) {
 710             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 711             DEFINE_PROP_END_OF_LIST(),
 712         },
 713         .qdev.reset = virtio_pci_reset,
 714     },{
 715 #ifdef CONFIG_VIRTFS
 716         .qdev.name = "virtio-9p-pci",
 717         .qdev.size = sizeof(VirtIOPCIProxy),
 718         .init      = virtio_9p_init_pci,
 719         .qdev.props = (Property[]) {
 720             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 721             DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
 722             DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
 723             DEFINE_PROP_END_OF_LIST(),
 724         },
 725     }, {
 726 #endif
 727         /* end of list */
 728     }
 729 };
 730
 731 static void virtio_pci_register_devices(void)
 732 {
 733     pci_qdev_register_many(virtio_info);
 734 }
 735
 736 device_init(virtio_pci_register_devices)