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         error_report("%s: unexpected address 0x%x value 0x%x",
 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_vq(PCIDevice *dev, unsigned vector,
 433                               VirtQueue *vq, int masked)
 434 {
 435 #ifdef CONFIG_KVM
 436     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 437     int r = kvm_set_irqfd(dev->msix_irq_entries[vector].gsi,
 438                           event_notifier_get_fd(notifier),
 439                           !masked);
 440     if (r < 0) {
 441         return (r == -ENOSYS) ? 0 : r;
 442     }
 443     if (masked) {
 444         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 445                             virtio_pci_guest_notifier_read, NULL, vq);
 446     } else {
 447         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 448                             NULL, NULL, NULL);
 449     }
 450     return 0;
 451 #else
 452     return -ENOSYS;
 453 #endif
 454 }
 455
 456 static int virtio_pci_mask_notifier(PCIDevice *dev, unsigned vector,
 457                                     int masked)
 458 {
 459     VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
 460     VirtIODevice *vdev = proxy->vdev;
 461     int r, n;
 462
 463     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 464         if (!virtio_queue_get_num(vdev, n)) {
 465             break;
 466         }
 467         if (virtio_queue_vector(vdev, n) != vector) {
 468             continue;
 469         }
 470         r = virtio_pci_mask_vq(dev, vector, virtio_get_queue(vdev, n), masked);
 471         if (r < 0) {
 472             goto undo;
 473         }
 474     }
 475     return 0;
 476 undo:
 477     while (--n >= 0) {
 478         virtio_pci_mask_vq(dev, vector, virtio_get_queue(vdev, n), !masked);
 479     }
 480     return r;
 481 }
 482
 483
 484 static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign)
 485 {
 486     VirtIOPCIProxy *proxy = opaque;
 487     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 488     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 489
 490     if (assign) {
 491         int r = event_notifier_init(notifier, 0);
 492         if (r < 0) {
 493             return r;
 494         }
 495         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 496                             virtio_pci_guest_notifier_read, NULL, vq);
 497     } else {
 498         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 499                             NULL, NULL, NULL);
 500         /* Test and clear notifier before closing it,
 501          * in case poll callback didn't have time to run. */
 502         virtio_pci_guest_notifier_read(vq);
 503         event_notifier_cleanup(notifier);
 504     }
 505
 506     return 0;
 507 }
 508
 509 static int virtio_pci_set_guest_notifiers(void *opaque, bool assign)
 510 {
 511     VirtIOPCIProxy *proxy = opaque;
 512     VirtIODevice *vdev = proxy->vdev;
 513     int r, n;
 514
 515     /* Must unset mask notifier while guest notifier
 516      * is still assigned */
 517     if (!assign) {
 518             r = msix_unset_mask_notifier(&proxy->pci_dev);
 519             assert(r >= 0);
 520     }
 521
 522     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 523         if (!virtio_queue_get_num(vdev, n)) {
 524             break;
 525         }
 526
 527         r = virtio_pci_set_guest_notifier(opaque, n, assign);
 528         if (r < 0) {
 529             goto assign_error;
 530         }
 531     }
 532
 533     /* Must set mask notifier after guest notifier
 534      * has been assigned */
 535     if (assign) {
 536         r = msix_set_mask_notifier(&proxy->pci_dev,
 537                                    virtio_pci_mask_notifier);
 538         if (r < 0) {
 539             goto assign_error;
 540         }
 541     }
 542
 543     return 0;
 544
 545 assign_error:
 546     /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
 547     while (--n >= 0) {
 548         virtio_pci_set_guest_notifier(opaque, n, !assign);
 549     }
 550     return r;
 551 }
 552
 553 static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign)
 554 {
 555     VirtIOPCIProxy *proxy = opaque;
 556     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 557     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
 558     int r;
 559     if (assign) {
 560         r = event_notifier_init(notifier, 1);
 561         if (r < 0) {
 562             return r;
 563         }
 564         r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
 565                                        proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
 566                                        n, assign);
 567         if (r < 0) {
 568             event_notifier_cleanup(notifier);
 569         }
 570     } else {
 571         r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
 572                                        proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
 573                                        n, assign);
 574         if (r < 0) {
 575             return r;
 576         }
 577         event_notifier_cleanup(notifier);
 578     }
 579     return r;
 580 }
 581
 582 static const VirtIOBindings virtio_pci_bindings = {
 583     .notify = virtio_pci_notify,
 584     .save_config = virtio_pci_save_config,
 585     .load_config = virtio_pci_load_config,
 586     .save_queue = virtio_pci_save_queue,
 587     .load_queue = virtio_pci_load_queue,
 588     .get_features = virtio_pci_get_features,
 589     .set_host_notifier = virtio_pci_set_host_notifier,
 590     .set_guest_notifiers = virtio_pci_set_guest_notifiers,
 591 };
 592
 593 static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev,
 594                             uint16_t vendor, uint16_t device,
 595                             uint16_t class_code, uint8_t pif)
 596 {
 597     uint8_t *config;
 598     uint32_t size;
 599
 600     proxy->vdev = vdev;
 601
 602     config = proxy->pci_dev.config;
 603     pci_config_set_vendor_id(config, vendor);
 604     pci_config_set_device_id(config, device);
 605
 606     config[0x08] = VIRTIO_PCI_ABI_VERSION;
 607
 608     config[0x09] = pif;
 609     pci_config_set_class(config, class_code);
 610
 611     config[0x2c] = vendor & 0xFF;
 612     config[0x2d] = (vendor >> 8) & 0xFF;
 613     config[0x2e] = vdev->device_id & 0xFF;
 614     config[0x2f] = (vdev->device_id >> 8) & 0xFF;
 615
 616     config[0x3d] = 1;
 617
 618     if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors, 1, 0)) {
 619         pci_register_bar(&proxy->pci_dev, 1,
 620                          msix_bar_size(&proxy->pci_dev),
 621                          PCI_BASE_ADDRESS_SPACE_MEMORY,
 622                          msix_mmio_map);
 623     } else
 624         vdev->nvectors = 0;
 625
 626     proxy->pci_dev.config_write = virtio_write_config;
 627
 628     size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len;
 629     if (size & (size-1))
 630         size = 1 << qemu_fls(size);
 631
 632     pci_register_bar(&proxy->pci_dev, 0, size, PCI_BASE_ADDRESS_SPACE_IO,
 633                            virtio_map);
 634
 635     virtio_bind_device(vdev, &virtio_pci_bindings, proxy);
 636     proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 637     proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
 638     proxy->host_features = vdev->get_features(vdev, proxy->host_features);
 639 }
 640
 641 static int virtio_blk_init_pci(PCIDevice *pci_dev)
 642 {
 643     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 644     VirtIODevice *vdev;
 645
 646     if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
 647         proxy->class_code != PCI_CLASS_STORAGE_OTHER)
 648         proxy->class_code = PCI_CLASS_STORAGE_SCSI;
 649
 650     vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block);
 651     if (!vdev) {
 652         return -1;
 653     }
 654     vdev->nvectors = proxy->nvectors;
 655     virtio_init_pci(proxy, vdev,
 656                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 657                     PCI_DEVICE_ID_VIRTIO_BLOCK,
 658                     proxy->class_code, 0x00);
 659     /* make the actual value visible */
 660     proxy->nvectors = vdev->nvectors;
 661     return 0;
 662 }
 663
 664 static int virtio_exit_pci(PCIDevice *pci_dev)
 665 {
 666     return msix_uninit(pci_dev);
 667 }
 668
 669 static int virtio_blk_exit_pci(PCIDevice *pci_dev)
 670 {
 671     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 672
 673     virtio_blk_exit(proxy->vdev);
 674     blockdev_mark_auto_del(proxy->block.bs);
 675     return virtio_exit_pci(pci_dev);
 676 }
 677
 678 static int virtio_serial_init_pci(PCIDevice *pci_dev)
 679 {
 680     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 681     VirtIODevice *vdev;
 682
 683     if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
 684         proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
 685         proxy->class_code != PCI_CLASS_OTHERS)          /* qemu-kvm  */
 686         proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER;
 687
 688     vdev = virtio_serial_init(&pci_dev->qdev, proxy->max_virtserial_ports);
 689     if (!vdev) {
 690         return -1;
 691     }
 692     vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
 693                                         ? proxy->max_virtserial_ports + 1
 694                                         : proxy->nvectors;
 695     virtio_init_pci(proxy, vdev,
 696                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 697                     PCI_DEVICE_ID_VIRTIO_CONSOLE,
 698                     proxy->class_code, 0x00);
 699     proxy->nvectors = vdev->nvectors;
 700     return 0;
 701 }
 702
 703 static int virtio_serial_exit_pci(PCIDevice *pci_dev)
 704 {
 705     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 706
 707     virtio_serial_exit(proxy->vdev);
 708     return virtio_exit_pci(pci_dev);
 709 }
 710
 711 static int virtio_net_init_pci(PCIDevice *pci_dev)
 712 {
 713     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 714     VirtIODevice *vdev;
 715
 716     vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net);
 717
 718     vdev->nvectors = proxy->nvectors;
 719     virtio_init_pci(proxy, vdev,
 720                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 721                     PCI_DEVICE_ID_VIRTIO_NET,
 722                     PCI_CLASS_NETWORK_ETHERNET,
 723                     0x00);
 724
 725     /* make the actual value visible */
 726     proxy->nvectors = vdev->nvectors;
 727     return 0;
 728 }
 729
 730 static int virtio_net_exit_pci(PCIDevice *pci_dev)
 731 {
 732     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 733
 734     virtio_net_exit(proxy->vdev);
 735     return virtio_exit_pci(pci_dev);
 736 }
 737
 738 static int virtio_balloon_init_pci(PCIDevice *pci_dev)
 739 {
 740     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 741     VirtIODevice *vdev;
 742
 743     vdev = virtio_balloon_init(&pci_dev->qdev);
 744     virtio_init_pci(proxy, vdev,
 745                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 746                     PCI_DEVICE_ID_VIRTIO_BALLOON,
 747                     PCI_CLASS_MEMORY_RAM,
 748                     0x00);
 749     return 0;
 750 }
 751
 752 #ifdef CONFIG_VIRTFS
 753 static int virtio_9p_init_pci(PCIDevice *pci_dev)
 754 {
 755     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 756     VirtIODevice *vdev;
 757
 758     vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
 759     vdev->nvectors = proxy->nvectors;
 760     virtio_init_pci(proxy, vdev,
 761                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 762                     0x1009,
 763                     0x2,
 764                     0x00);
 765     /* make the actual value visible */
 766     proxy->nvectors = vdev->nvectors;
 767     return 0;
 768 }
 769 #endif
 770
 771 static PCIDeviceInfo virtio_info[] = {
 772     {
 773         .qdev.name = "virtio-blk-pci",
 774         .qdev.size = sizeof(VirtIOPCIProxy),
 775         .init      = virtio_blk_init_pci,
 776         .exit      = virtio_blk_exit_pci,
 777         .qdev.props = (Property[]) {
 778             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
 779             DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block),
 780             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
 781             DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
 782             DEFINE_PROP_END_OF_LIST(),
 783         },
 784         .qdev.reset = virtio_pci_reset,
 785     },{
 786         .qdev.name  = "virtio-net-pci",
 787         .qdev.size  = sizeof(VirtIOPCIProxy),
 788         .init       = virtio_net_init_pci,
 789         .exit       = virtio_net_exit_pci,
 790         .romfile    = "pxe-virtio.bin",
 791         .qdev.props = (Property[]) {
 792             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
 793             DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
 794             DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic),
 795             DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy,
 796                                net.txtimer, TX_TIMER_INTERVAL),
 797             DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy,
 798                               net.txburst, TX_BURST),
 799             DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
 800             DEFINE_PROP_END_OF_LIST(),
 801         },
 802         .qdev.reset = virtio_pci_reset,
 803     },{
 804         .qdev.name = "virtio-serial-pci",
 805         .qdev.alias = "virtio-serial",
 806         .qdev.size = sizeof(VirtIOPCIProxy),
 807         .init      = virtio_serial_init_pci,
 808         .exit      = virtio_serial_exit_pci,
 809         .qdev.props = (Property[]) {
 810             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
 811                                DEV_NVECTORS_UNSPECIFIED),
 812             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
 813             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 814             DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, max_virtserial_ports,
 815                                31),
 816             DEFINE_PROP_END_OF_LIST(),
 817         },
 818         .qdev.reset = virtio_pci_reset,
 819     },{
 820         .qdev.name = "virtio-balloon-pci",
 821         .qdev.size = sizeof(VirtIOPCIProxy),
 822         .init      = virtio_balloon_init_pci,
 823         .exit      = virtio_exit_pci,
 824         .qdev.props = (Property[]) {
 825             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 826             DEFINE_PROP_END_OF_LIST(),
 827         },
 828         .qdev.reset = virtio_pci_reset,
 829     },{
 830 #ifdef CONFIG_VIRTFS
 831         .qdev.name = "virtio-9p-pci",
 832         .qdev.size = sizeof(VirtIOPCIProxy),
 833         .init      = virtio_9p_init_pci,
 834         .qdev.props = (Property[]) {
 835             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
 836             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 837             DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
 838             DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
 839             DEFINE_PROP_END_OF_LIST(),
 840         },
 841     }, {
 842 #endif
 843         /* end of list */
 844     }
 845 };
 846
 847 static void virtio_pci_register_devices(void)
 848 {
 849     pci_qdev_register_many(virtio_info);
 850 }
 851
 852 device_init(virtio_pci_register_devices)