hw/s390x/virtio-ccw.c

   1 /*
   2  * virtio ccw target implementation
   3  *
   4  * Copyright 2012 IBM Corp.
   5  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #include "hw/hw.h"
  13 #include "block/block.h"
  14 #include "sysemu/blockdev.h"
  15 #include "sysemu/sysemu.h"
  16 #include "net/net.h"
  17 #include "monitor/monitor.h"
  18 #include "hw/virtio/virtio.h"
  19 #include "hw/virtio/virtio-serial.h"
  20 #include "hw/virtio/virtio-net.h"
  21 #include "hw/sysbus.h"
  22 #include "qemu/bitops.h"
  23 #include "hw/virtio/virtio-bus.h"
  24
  25 #include "ioinst.h"
  26 #include "css.h"
  27 #include "virtio-ccw.h"
  28 #include "trace.h"
  29
  30 static void virtio_ccw_bus_new(VirtioBusState *bus, VirtioCcwDevice *dev);
  31
  32 static int virtual_css_bus_reset(BusState *qbus)
  33 {
  34     /* This should actually be modelled via the generic css */
  35     css_reset();
  36
  37     /* we dont traverse ourself, return 0 */
  38     return 0;
  39 }
  40
  41
  42 static void virtual_css_bus_class_init(ObjectClass *klass, void *data)
  43 {
  44     BusClass *k = BUS_CLASS(klass);
  45
  46     k->reset = virtual_css_bus_reset;
  47 }
  48
  49 static const TypeInfo virtual_css_bus_info = {
  50     .name = TYPE_VIRTUAL_CSS_BUS,
  51     .parent = TYPE_BUS,
  52     .instance_size = sizeof(VirtualCssBus),
  53     .class_init = virtual_css_bus_class_init,
  54 };
  55
  56 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
  57 {
  58     VirtIODevice *vdev = NULL;
  59
  60     if (sch->driver_data) {
  61         vdev = ((VirtioCcwDevice *)sch->driver_data)->vdev;
  62     }
  63     return vdev;
  64 }
  65
  66 static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
  67                                               bool assign, bool set_handler)
  68 {
  69     VirtQueue *vq = virtio_get_queue(dev->vdev, n);
  70     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
  71     int r = 0;
  72     SubchDev *sch = dev->sch;
  73     uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
  74
  75     if (assign) {
  76         r = event_notifier_init(notifier, 1);
  77         if (r < 0) {
  78             error_report("%s: unable to init event notifier: %d", __func__, r);
  79             return r;
  80         }
  81         virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
  82         r = s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
  83         if (r < 0) {
  84             error_report("%s: unable to assign ioeventfd: %d", __func__, r);
  85             virtio_queue_set_host_notifier_fd_handler(vq, false, false);
  86             event_notifier_cleanup(notifier);
  87             return r;
  88         }
  89     } else {
  90         virtio_queue_set_host_notifier_fd_handler(vq, false, false);
  91         s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
  92         event_notifier_cleanup(notifier);
  93     }
  94     return r;
  95 }
  96
  97 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
  98 {
  99     int n, r;
 100
 101     if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) ||
 102         dev->ioeventfd_disabled ||
 103         dev->ioeventfd_started) {
 104         return;
 105     }
 106     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 107         if (!virtio_queue_get_num(dev->vdev, n)) {
 108             continue;
 109         }
 110         r = virtio_ccw_set_guest2host_notifier(dev, n, true, true);
 111         if (r < 0) {
 112             goto assign_error;
 113         }
 114     }
 115     dev->ioeventfd_started = true;
 116     return;
 117
 118   assign_error:
 119     while (--n >= 0) {
 120         if (!virtio_queue_get_num(dev->vdev, n)) {
 121             continue;
 122         }
 123         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 124         assert(r >= 0);
 125     }
 126     dev->ioeventfd_started = false;
 127     /* Disable ioeventfd for this device. */
 128     dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
 129     error_report("%s: failed. Fallback to userspace (slower).", __func__);
 130 }
 131
 132 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
 133 {
 134     int n, r;
 135
 136     if (!dev->ioeventfd_started) {
 137         return;
 138     }
 139     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 140         if (!virtio_queue_get_num(dev->vdev, n)) {
 141             continue;
 142         }
 143         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 144         assert(r >= 0);
 145     }
 146     dev->ioeventfd_started = false;
 147 }
 148
 149 VirtualCssBus *virtual_css_bus_init(void)
 150 {
 151     VirtualCssBus *cbus;
 152     BusState *bus;
 153     DeviceState *dev;
 154
 155     /* Create bridge device */
 156     dev = qdev_create(NULL, "virtual-css-bridge");
 157     qdev_init_nofail(dev);
 158
 159     /* Create bus on bridge device */
 160     bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
 161     cbus = VIRTUAL_CSS_BUS(bus);
 162
 163     /* Enable hotplugging */
 164     bus->allow_hotplug = 1;
 165
 166     return cbus;
 167 }
 168
 169 /* Communication blocks used by several channel commands. */
 170 typedef struct VqInfoBlock {
 171     uint64_t queue;
 172     uint32_t align;
 173     uint16_t index;
 174     uint16_t num;
 175 } QEMU_PACKED VqInfoBlock;
 176
 177 typedef struct VqConfigBlock {
 178     uint16_t index;
 179     uint16_t num_max;
 180 } QEMU_PACKED VqConfigBlock;
 181
 182 typedef struct VirtioFeatDesc {
 183     uint32_t features;
 184     uint8_t index;
 185 } QEMU_PACKED VirtioFeatDesc;
 186
 187 /* Specify where the virtqueues for the subchannel are in guest memory. */
 188 static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align,
 189                               uint16_t index, uint16_t num)
 190 {
 191     VirtioCcwDevice *dev = sch->driver_data;
 192
 193     if (index > VIRTIO_PCI_QUEUE_MAX) {
 194         return -EINVAL;
 195     }
 196
 197     /* Current code in virtio.c relies on 4K alignment. */
 198     if (addr && (align != 4096)) {
 199         return -EINVAL;
 200     }
 201
 202     if (!dev) {
 203         return -EINVAL;
 204     }
 205
 206     virtio_queue_set_addr(dev->vdev, index, addr);
 207     if (!addr) {
 208         virtio_queue_set_vector(dev->vdev, index, 0);
 209     } else {
 210         /* Fail if we don't have a big enough queue. */
 211         /* TODO: Add interface to handle vring.num changing */
 212         if (virtio_queue_get_num(dev->vdev, index) > num) {
 213             return -EINVAL;
 214         }
 215         virtio_queue_set_vector(dev->vdev, index, index);
 216     }
 217     /* tell notify handler in case of config change */
 218     dev->vdev->config_vector = VIRTIO_PCI_QUEUE_MAX;
 219     return 0;
 220 }
 221
 222 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
 223 {
 224     int ret;
 225     VqInfoBlock info;
 226     uint8_t status;
 227     VirtioFeatDesc features;
 228     void *config;
 229     hwaddr indicators;
 230     VqConfigBlock vq_config;
 231     VirtioCcwDevice *dev = sch->driver_data;
 232     bool check_len;
 233     int len;
 234     hwaddr hw_len;
 235
 236     if (!dev) {
 237         return -EINVAL;
 238     }
 239
 240     trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
 241                                    ccw.cmd_code);
 242     check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
 243
 244     /* Look at the command. */
 245     switch (ccw.cmd_code) {
 246     case CCW_CMD_SET_VQ:
 247         if (check_len) {
 248             if (ccw.count != sizeof(info)) {
 249                 ret = -EINVAL;
 250                 break;
 251             }
 252         } else if (ccw.count < sizeof(info)) {
 253             /* Can't execute command. */
 254             ret = -EINVAL;
 255             break;
 256         }
 257         if (!ccw.cda) {
 258             ret = -EFAULT;
 259         } else {
 260             info.queue = ldq_phys(ccw.cda);
 261             info.align = ldl_phys(ccw.cda + sizeof(info.queue));
 262             info.index = lduw_phys(ccw.cda + sizeof(info.queue)
 263                                    + sizeof(info.align));
 264             info.num = lduw_phys(ccw.cda + sizeof(info.queue)
 265                                  + sizeof(info.align)
 266                                  + sizeof(info.index));
 267             ret = virtio_ccw_set_vqs(sch, info.queue, info.align, info.index,
 268                                      info.num);
 269             sch->curr_status.scsw.count = 0;
 270         }
 271         break;
 272     case CCW_CMD_VDEV_RESET:
 273         virtio_ccw_stop_ioeventfd(dev);
 274         virtio_reset(dev->vdev);
 275         ret = 0;
 276         break;
 277     case CCW_CMD_READ_FEAT:
 278         if (check_len) {
 279             if (ccw.count != sizeof(features)) {
 280                 ret = -EINVAL;
 281                 break;
 282             }
 283         } else if (ccw.count < sizeof(features)) {
 284             /* Can't execute command. */
 285             ret = -EINVAL;
 286             break;
 287         }
 288         if (!ccw.cda) {
 289             ret = -EFAULT;
 290         } else {
 291             features.index = ldub_phys(ccw.cda + sizeof(features.features));
 292             if (features.index < ARRAY_SIZE(dev->host_features)) {
 293                 features.features = dev->host_features[features.index];
 294             } else {
 295                 /* Return zeroes if the guest supports more feature bits. */
 296                 features.features = 0;
 297             }
 298             stl_le_phys(ccw.cda, features.features);
 299             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 300             ret = 0;
 301         }
 302         break;
 303     case CCW_CMD_WRITE_FEAT:
 304         if (check_len) {
 305             if (ccw.count != sizeof(features)) {
 306                 ret = -EINVAL;
 307                 break;
 308             }
 309         } else if (ccw.count < sizeof(features)) {
 310             /* Can't execute command. */
 311             ret = -EINVAL;
 312             break;
 313         }
 314         if (!ccw.cda) {
 315             ret = -EFAULT;
 316         } else {
 317             features.index = ldub_phys(ccw.cda + sizeof(features.features));
 318             features.features = ldl_le_phys(ccw.cda);
 319             if (features.index < ARRAY_SIZE(dev->host_features)) {
 320                 virtio_bus_set_vdev_features(&dev->bus, features.features);
 321                 dev->vdev->guest_features = features.features;
 322             } else {
 323                 /*
 324                  * If the guest supports more feature bits, assert that it
 325                  * passes us zeroes for those we don't support.
 326                  */
 327                 if (features.features) {
 328                     fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n",
 329                             features.index, features.features);
 330                     /* XXX: do a unit check here? */
 331                 }
 332             }
 333             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 334             ret = 0;
 335         }
 336         break;
 337     case CCW_CMD_READ_CONF:
 338         if (check_len) {
 339             if (ccw.count > dev->vdev->config_len) {
 340                 ret = -EINVAL;
 341                 break;
 342             }
 343         }
 344         len = MIN(ccw.count, dev->vdev->config_len);
 345         if (!ccw.cda) {
 346             ret = -EFAULT;
 347         } else {
 348             virtio_bus_get_vdev_config(&dev->bus, dev->vdev->config);
 349             /* XXX config space endianness */
 350             cpu_physical_memory_write(ccw.cda, dev->vdev->config, len);
 351             sch->curr_status.scsw.count = ccw.count - len;
 352             ret = 0;
 353         }
 354         break;
 355     case CCW_CMD_WRITE_CONF:
 356         if (check_len) {
 357             if (ccw.count > dev->vdev->config_len) {
 358                 ret = -EINVAL;
 359                 break;
 360             }
 361         }
 362         len = MIN(ccw.count, dev->vdev->config_len);
 363         hw_len = len;
 364         if (!ccw.cda) {
 365             ret = -EFAULT;
 366         } else {
 367             config = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
 368             if (!config) {
 369                 ret = -EFAULT;
 370             } else {
 371                 len = hw_len;
 372                 /* XXX config space endianness */
 373                 memcpy(dev->vdev->config, config, len);
 374                 cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
 375                 virtio_bus_set_vdev_config(&dev->bus, dev->vdev->config);
 376                 sch->curr_status.scsw.count = ccw.count - len;
 377                 ret = 0;
 378             }
 379         }
 380         break;
 381     case CCW_CMD_WRITE_STATUS:
 382         if (check_len) {
 383             if (ccw.count != sizeof(status)) {
 384                 ret = -EINVAL;
 385                 break;
 386             }
 387         } else if (ccw.count < sizeof(status)) {
 388             /* Can't execute command. */
 389             ret = -EINVAL;
 390             break;
 391         }
 392         if (!ccw.cda) {
 393             ret = -EFAULT;
 394         } else {
 395             status = ldub_phys(ccw.cda);
 396             if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
 397                 virtio_ccw_stop_ioeventfd(dev);
 398             }
 399             virtio_set_status(dev->vdev, status);
 400             if (dev->vdev->status == 0) {
 401                 virtio_reset(dev->vdev);
 402             }
 403             if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
 404                 virtio_ccw_start_ioeventfd(dev);
 405             }
 406             sch->curr_status.scsw.count = ccw.count - sizeof(status);
 407             ret = 0;
 408         }
 409         break;
 410     case CCW_CMD_SET_IND:
 411         if (check_len) {
 412             if (ccw.count != sizeof(indicators)) {
 413                 ret = -EINVAL;
 414                 break;
 415             }
 416         } else if (ccw.count < sizeof(indicators)) {
 417             /* Can't execute command. */
 418             ret = -EINVAL;
 419             break;
 420         }
 421         if (!ccw.cda) {
 422             ret = -EFAULT;
 423         } else {
 424             indicators = ldq_phys(ccw.cda);
 425             dev->indicators = indicators;
 426             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 427             ret = 0;
 428         }
 429         break;
 430     case CCW_CMD_SET_CONF_IND:
 431         if (check_len) {
 432             if (ccw.count != sizeof(indicators)) {
 433                 ret = -EINVAL;
 434                 break;
 435             }
 436         } else if (ccw.count < sizeof(indicators)) {
 437             /* Can't execute command. */
 438             ret = -EINVAL;
 439             break;
 440         }
 441         if (!ccw.cda) {
 442             ret = -EFAULT;
 443         } else {
 444             indicators = ldq_phys(ccw.cda);
 445             dev->indicators2 = indicators;
 446             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 447             ret = 0;
 448         }
 449         break;
 450     case CCW_CMD_READ_VQ_CONF:
 451         if (check_len) {
 452             if (ccw.count != sizeof(vq_config)) {
 453                 ret = -EINVAL;
 454                 break;
 455             }
 456         } else if (ccw.count < sizeof(vq_config)) {
 457             /* Can't execute command. */
 458             ret = -EINVAL;
 459             break;
 460         }
 461         if (!ccw.cda) {
 462             ret = -EFAULT;
 463         } else {
 464             vq_config.index = lduw_phys(ccw.cda);
 465             vq_config.num_max = virtio_queue_get_num(dev->vdev,
 466                                                      vq_config.index);
 467             stw_phys(ccw.cda + sizeof(vq_config.index), vq_config.num_max);
 468             sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
 469             ret = 0;
 470         }
 471         break;
 472     default:
 473         ret = -ENOSYS;
 474         break;
 475     }
 476     return ret;
 477 }
 478
 479 static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev)
 480 {
 481     unsigned int cssid = 0;
 482     unsigned int ssid = 0;
 483     unsigned int schid;
 484     unsigned int devno;
 485     bool have_devno = false;
 486     bool found = false;
 487     SubchDev *sch;
 488     int ret;
 489     int num;
 490     DeviceState *parent = DEVICE(dev);
 491
 492     sch = g_malloc0(sizeof(SubchDev));
 493
 494     sch->driver_data = dev;
 495     dev->sch = sch;
 496
 497     dev->vdev = vdev;
 498     dev->indicators = 0;
 499
 500     /* Initialize subchannel structure. */
 501     sch->channel_prog = 0x0;
 502     sch->last_cmd_valid = false;
 503     sch->orb = NULL;
 504     /*
 505      * Use a device number if provided. Otherwise, fall back to subchannel
 506      * number.
 507      */
 508     if (dev->bus_id) {
 509         num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno);
 510         if (num == 3) {
 511             if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
 512                 ret = -EINVAL;
 513                 error_report("Invalid cssid or ssid: cssid %x, ssid %x",
 514                              cssid, ssid);
 515                 goto out_err;
 516             }
 517             /* Enforce use of virtual cssid. */
 518             if (cssid != VIRTUAL_CSSID) {
 519                 ret = -EINVAL;
 520                 error_report("cssid %x not valid for virtio devices", cssid);
 521                 goto out_err;
 522             }
 523             if (css_devno_used(cssid, ssid, devno)) {
 524                 ret = -EEXIST;
 525                 error_report("Device %x.%x.%04x already exists", cssid, ssid,
 526                              devno);
 527                 goto out_err;
 528             }
 529             sch->cssid = cssid;
 530             sch->ssid = ssid;
 531             sch->devno = devno;
 532             have_devno = true;
 533         } else {
 534             ret = -EINVAL;
 535             error_report("Malformed devno parameter '%s'", dev->bus_id);
 536             goto out_err;
 537         }
 538     }
 539
 540     /* Find the next free id. */
 541     if (have_devno) {
 542         for (schid = 0; schid <= MAX_SCHID; schid++) {
 543             if (!css_find_subch(1, cssid, ssid, schid)) {
 544                 sch->schid = schid;
 545                 css_subch_assign(cssid, ssid, schid, devno, sch);
 546                 found = true;
 547                 break;
 548             }
 549         }
 550         if (!found) {
 551             ret = -ENODEV;
 552             error_report("No free subchannel found for %x.%x.%04x", cssid, ssid,
 553                          devno);
 554             goto out_err;
 555         }
 556         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 557                                     "user-configured");
 558     } else {
 559         cssid = VIRTUAL_CSSID;
 560         for (ssid = 0; ssid <= MAX_SSID; ssid++) {
 561             for (schid = 0; schid <= MAX_SCHID; schid++) {
 562                 if (!css_find_subch(1, cssid, ssid, schid)) {
 563                     sch->cssid = cssid;
 564                     sch->ssid = ssid;
 565                     sch->schid = schid;
 566                     devno = schid;
 567                     /*
 568                      * If the devno is already taken, look further in this
 569                      * subchannel set.
 570                      */
 571                     while (css_devno_used(cssid, ssid, devno)) {
 572                         if (devno == MAX_SCHID) {
 573                             devno = 0;
 574                         } else if (devno == schid - 1) {
 575                             ret = -ENODEV;
 576                             error_report("No free devno found");
 577                             goto out_err;
 578                         } else {
 579                             devno++;
 580                         }
 581                     }
 582                     sch->devno = devno;
 583                     css_subch_assign(cssid, ssid, schid, devno, sch);
 584                     found = true;
 585                     break;
 586                 }
 587             }
 588             if (found) {
 589                 break;
 590             }
 591         }
 592         if (!found) {
 593             ret = -ENODEV;
 594             error_report("Virtual channel subsystem is full!");
 595             goto out_err;
 596         }
 597         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 598                                     "auto-configured");
 599     }
 600
 601     /* Build initial schib. */
 602     css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
 603
 604     sch->ccw_cb = virtio_ccw_cb;
 605
 606     /* Build senseid data. */
 607     memset(&sch->id, 0, sizeof(SenseId));
 608     sch->id.reserved = 0xff;
 609     sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
 610     sch->id.cu_model = dev->vdev->device_id;
 611
 612     /* Only the first 32 feature bits are used. */
 613     dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus,
 614                                                          dev->host_features[0]);
 615
 616     dev->host_features[0] |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 617     dev->host_features[0] |= 0x1 << VIRTIO_F_BAD_FEATURE;
 618
 619     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
 620                           parent->hotplugged, 1);
 621     return 0;
 622
 623 out_err:
 624     dev->sch = NULL;
 625     g_free(sch);
 626     return ret;
 627 }
 628
 629 static int virtio_ccw_exit(VirtioCcwDevice *dev)
 630 {
 631     SubchDev *sch = dev->sch;
 632
 633     virtio_ccw_stop_ioeventfd(dev);
 634     if (sch) {
 635         css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 636         g_free(sch);
 637     }
 638     dev->indicators = 0;
 639     return 0;
 640 }
 641
 642 static int virtio_ccw_net_init(VirtioCcwDevice *ccw_dev)
 643 {
 644     DeviceState *qdev = DEVICE(ccw_dev);
 645     VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev);
 646     DeviceState *vdev = DEVICE(&dev->vdev);
 647
 648     virtio_net_set_config_size(&dev->vdev, ccw_dev->host_features[0]);
 649     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
 650                                   object_get_typename(OBJECT(qdev)));
 651     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 652     if (qdev_init(vdev) < 0) {
 653         return -1;
 654     }
 655
 656     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 657 }
 658
 659 static void virtio_ccw_net_instance_init(Object *obj)
 660 {
 661     VirtIONetCcw *dev = VIRTIO_NET_CCW(obj);
 662     object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_NET);
 663     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 664 }
 665
 666 static int virtio_ccw_blk_init(VirtioCcwDevice *ccw_dev)
 667 {
 668     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev);
 669     DeviceState *vdev = DEVICE(&dev->vdev);
 670     virtio_blk_set_conf(vdev, &(dev->blk));
 671     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 672     if (qdev_init(vdev) < 0) {
 673         return -1;
 674     }
 675
 676     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 677 }
 678
 679 static void virtio_ccw_blk_instance_init(Object *obj)
 680 {
 681     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj);
 682     object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BLK);
 683     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 684 }
 685
 686 static int virtio_ccw_serial_init(VirtioCcwDevice *ccw_dev)
 687 {
 688     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev);
 689     DeviceState *vdev = DEVICE(&dev->vdev);
 690     DeviceState *proxy = DEVICE(ccw_dev);
 691     char *bus_name;
 692
 693     /*
 694      * For command line compatibility, this sets the virtio-serial-device bus
 695      * name as before.
 696      */
 697     if (proxy->id) {
 698         bus_name = g_strdup_printf("%s.0", proxy->id);
 699         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
 700         g_free(bus_name);
 701     }
 702
 703     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 704     if (qdev_init(vdev) < 0) {
 705         return -1;
 706     }
 707
 708     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 709 }
 710
 711
 712 static void virtio_ccw_serial_instance_init(Object *obj)
 713 {
 714     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj);
 715     object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SERIAL);
 716     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 717 }
 718
 719 static int virtio_ccw_balloon_init(VirtioCcwDevice *ccw_dev)
 720 {
 721     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev);
 722     DeviceState *vdev = DEVICE(&dev->vdev);
 723
 724     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 725     if (qdev_init(vdev) < 0) {
 726         return -1;
 727     }
 728
 729     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 730 }
 731
 732 static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v,
 733                                       void *opaque, const char *name,
 734                                       Error **errp)
 735 {
 736     VirtIOBalloonCcw *dev = opaque;
 737     object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp);
 738 }
 739
 740 static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v,
 741                                                 void *opaque, const char *name,
 742                                                 Error **errp)
 743 {
 744     VirtIOBalloonCcw *dev = opaque;
 745     object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
 746                         errp);
 747 }
 748
 749 static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v,
 750                                                 void *opaque, const char *name,
 751                                                 Error **errp)
 752 {
 753     VirtIOBalloonCcw *dev = opaque;
 754     object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
 755                         errp);
 756 }
 757
 758 static void virtio_ccw_balloon_instance_init(Object *obj)
 759 {
 760     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj);
 761     object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BALLOON);
 762     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 763
 764     object_property_add(obj, "guest-stats", "guest statistics",
 765                         balloon_ccw_stats_get_all, NULL, NULL, dev, NULL);
 766
 767     object_property_add(obj, "guest-stats-polling-interval", "int",
 768                         balloon_ccw_stats_get_poll_interval,
 769                         balloon_ccw_stats_set_poll_interval,
 770                         NULL, dev, NULL);
 771 }
 772
 773 static int virtio_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
 774 {
 775     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev);
 776     DeviceState *vdev = DEVICE(&dev->vdev);
 777     DeviceState *qdev = DEVICE(ccw_dev);
 778     char *bus_name;
 779
 780     /*
 781      * For command line compatibility, this sets the virtio-scsi-device bus
 782      * name as before.
 783      */
 784     if (qdev->id) {
 785         bus_name = g_strdup_printf("%s.0", qdev->id);
 786         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
 787         g_free(bus_name);
 788     }
 789
 790     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 791     if (qdev_init(vdev) < 0) {
 792         return -1;
 793     }
 794
 795     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 796 }
 797
 798 static void virtio_ccw_scsi_instance_init(Object *obj)
 799 {
 800     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj);
 801     object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SCSI);
 802     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 803 }
 804
 805 #ifdef CONFIG_VHOST_SCSI
 806 static int vhost_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
 807 {
 808     VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
 809     DeviceState *vdev = DEVICE(&dev->vdev);
 810
 811     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 812     if (qdev_init(vdev) < 0) {
 813         return -1;
 814     }
 815
 816     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 817 }
 818
 819 static void vhost_ccw_scsi_instance_init(Object *obj)
 820 {
 821     VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
 822     object_initialize(OBJECT(&dev->vdev), TYPE_VHOST_SCSI);
 823     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 824 }
 825 #endif
 826
 827 static int virtio_ccw_rng_init(VirtioCcwDevice *ccw_dev)
 828 {
 829     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
 830     DeviceState *vdev = DEVICE(&dev->vdev);
 831
 832     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 833     if (qdev_init(vdev) < 0) {
 834         return -1;
 835     }
 836
 837     object_property_set_link(OBJECT(dev),
 838                              OBJECT(dev->vdev.conf.rng), "rng",
 839                              NULL);
 840
 841     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 842 }
 843
 844 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
 845  * be careful and test performance if you change this.
 846  */
 847 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
 848 {
 849     return container_of(d, VirtioCcwDevice, parent_obj);
 850 }
 851
 852 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
 853 {
 854     VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
 855     SubchDev *sch = dev->sch;
 856     uint64_t indicators;
 857
 858     if (vector >= 128) {
 859         return;
 860     }
 861
 862     if (vector < VIRTIO_PCI_QUEUE_MAX) {
 863         if (!dev->indicators) {
 864             return;
 865         }
 866         indicators = ldq_phys(dev->indicators);
 867         indicators |= 1ULL << vector;
 868         stq_phys(dev->indicators, indicators);
 869     } else {
 870         if (!dev->indicators2) {
 871             return;
 872         }
 873         vector = 0;
 874         indicators = ldq_phys(dev->indicators2);
 875         indicators |= 1ULL << vector;
 876         stq_phys(dev->indicators2, indicators);
 877     }
 878
 879     css_conditional_io_interrupt(sch);
 880
 881 }
 882
 883 static unsigned virtio_ccw_get_features(DeviceState *d)
 884 {
 885     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 886
 887     /* Only the first 32 feature bits are used. */
 888     return dev->host_features[0];
 889 }
 890
 891 static void virtio_ccw_reset(DeviceState *d)
 892 {
 893     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 894
 895     virtio_ccw_stop_ioeventfd(dev);
 896     virtio_reset(dev->vdev);
 897     css_reset_sch(dev->sch);
 898     dev->indicators = 0;
 899     dev->indicators2 = 0;
 900 }
 901
 902 static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
 903 {
 904     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 905
 906     if (running) {
 907         virtio_ccw_start_ioeventfd(dev);
 908     } else {
 909         virtio_ccw_stop_ioeventfd(dev);
 910     }
 911 }
 912
 913 static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
 914 {
 915     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 916
 917     return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
 918 }
 919
 920 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
 921 {
 922     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 923
 924     /* Stop using the generic ioeventfd, we are doing eventfd handling
 925      * ourselves below */
 926     dev->ioeventfd_disabled = assign;
 927     if (assign) {
 928         virtio_ccw_stop_ioeventfd(dev);
 929     }
 930     return virtio_ccw_set_guest2host_notifier(dev, n, assign, false);
 931 }
 932
 933 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
 934                                          bool assign, bool with_irqfd)
 935 {
 936     VirtQueue *vq = virtio_get_queue(dev->vdev, n);
 937     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 938     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(dev->vdev);
 939
 940     if (assign) {
 941         int r = event_notifier_init(notifier, 0);
 942
 943         if (r < 0) {
 944             return r;
 945         }
 946         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 947         /* We do not support irqfd for classic I/O interrupts, because the
 948          * classic interrupts are intermixed with the subchannel status, that
 949          * is queried with test subchannel. We want to use vhost, though.
 950          * Lets make sure to have vhost running and wire up the irq fd to
 951          * land in qemu (and only the irq fd) in this code.
 952          */
 953         if (k->guest_notifier_mask) {
 954             k->guest_notifier_mask(dev->vdev, n, false);
 955         }
 956         /* get lost events and re-inject */
 957         if (k->guest_notifier_pending &&
 958             k->guest_notifier_pending(dev->vdev, n)) {
 959             event_notifier_set(notifier);
 960         }
 961     } else {
 962         if (k->guest_notifier_mask) {
 963             k->guest_notifier_mask(dev->vdev, n, true);
 964         }
 965         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
 966         event_notifier_cleanup(notifier);
 967     }
 968     return 0;
 969 }
 970
 971 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
 972                                           bool assigned)
 973 {
 974     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 975     VirtIODevice *vdev = dev->vdev;
 976     int r, n;
 977
 978     for (n = 0; n < nvqs; n++) {
 979         if (!virtio_queue_get_num(vdev, n)) {
 980             break;
 981         }
 982         /* false -> true, as soon as irqfd works */
 983         r = virtio_ccw_set_guest_notifier(dev, n, assigned, false);
 984         if (r < 0) {
 985             goto assign_error;
 986         }
 987     }
 988     return 0;
 989
 990 assign_error:
 991     while (--n >= 0) {
 992         virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
 993     }
 994     return r;
 995 }
 996
 997 /**************** Virtio-ccw Bus Device Descriptions *******************/
 998
 999 static Property virtio_ccw_net_properties[] = {
1000     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1001     DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]),
1002     DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetCcw, vdev.net_conf),
1003     DEFINE_NIC_PROPERTIES(VirtIONetCcw, vdev.nic_conf),
1004     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1005                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1006     DEFINE_PROP_END_OF_LIST(),
1007 };
1008
1009 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
1010 {
1011     DeviceClass *dc = DEVICE_CLASS(klass);
1012     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1013
1014     k->init = virtio_ccw_net_init;
1015     k->exit = virtio_ccw_exit;
1016     dc->reset = virtio_ccw_reset;
1017     dc->props = virtio_ccw_net_properties;
1018 }
1019
1020 static const TypeInfo virtio_ccw_net = {
1021     .name          = TYPE_VIRTIO_NET_CCW,
1022     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1023     .instance_size = sizeof(VirtIONetCcw),
1024     .instance_init = virtio_ccw_net_instance_init,
1025     .class_init    = virtio_ccw_net_class_init,
1026 };
1027
1028 static Property virtio_ccw_blk_properties[] = {
1029     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1030     DEFINE_VIRTIO_BLK_FEATURES(VirtioCcwDevice, host_features[0]),
1031     DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkCcw, blk),
1032     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1033                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1034     DEFINE_PROP_END_OF_LIST(),
1035 };
1036
1037 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
1038 {
1039     DeviceClass *dc = DEVICE_CLASS(klass);
1040     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1041
1042     k->init = virtio_ccw_blk_init;
1043     k->exit = virtio_ccw_exit;
1044     dc->reset = virtio_ccw_reset;
1045     dc->props = virtio_ccw_blk_properties;
1046 }
1047
1048 static const TypeInfo virtio_ccw_blk = {
1049     .name          = TYPE_VIRTIO_BLK_CCW,
1050     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1051     .instance_size = sizeof(VirtIOBlkCcw),
1052     .instance_init = virtio_ccw_blk_instance_init,
1053     .class_init    = virtio_ccw_blk_class_init,
1054 };
1055
1056 static Property virtio_ccw_serial_properties[] = {
1057     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1058     DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtioSerialCcw, vdev.serial),
1059     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1060     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1061                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1062     DEFINE_PROP_END_OF_LIST(),
1063 };
1064
1065 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
1066 {
1067     DeviceClass *dc = DEVICE_CLASS(klass);
1068     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1069
1070     k->init = virtio_ccw_serial_init;
1071     k->exit = virtio_ccw_exit;
1072     dc->reset = virtio_ccw_reset;
1073     dc->props = virtio_ccw_serial_properties;
1074 }
1075
1076 static const TypeInfo virtio_ccw_serial = {
1077     .name          = TYPE_VIRTIO_SERIAL_CCW,
1078     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1079     .instance_size = sizeof(VirtioSerialCcw),
1080     .instance_init = virtio_ccw_serial_instance_init,
1081     .class_init    = virtio_ccw_serial_class_init,
1082 };
1083
1084 static Property virtio_ccw_balloon_properties[] = {
1085     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1086     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1087     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1088                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1089     DEFINE_PROP_END_OF_LIST(),
1090 };
1091
1092 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
1093 {
1094     DeviceClass *dc = DEVICE_CLASS(klass);
1095     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1096
1097     k->init = virtio_ccw_balloon_init;
1098     k->exit = virtio_ccw_exit;
1099     dc->reset = virtio_ccw_reset;
1100     dc->props = virtio_ccw_balloon_properties;
1101 }
1102
1103 static const TypeInfo virtio_ccw_balloon = {
1104     .name          = TYPE_VIRTIO_BALLOON_CCW,
1105     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1106     .instance_size = sizeof(VirtIOBalloonCcw),
1107     .instance_init = virtio_ccw_balloon_instance_init,
1108     .class_init    = virtio_ccw_balloon_class_init,
1109 };
1110
1111 static Property virtio_ccw_scsi_properties[] = {
1112     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1113     DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
1114     DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]),
1115     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1116                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1117     DEFINE_PROP_END_OF_LIST(),
1118 };
1119
1120 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
1121 {
1122     DeviceClass *dc = DEVICE_CLASS(klass);
1123     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1124
1125     k->init = virtio_ccw_scsi_init;
1126     k->exit = virtio_ccw_exit;
1127     dc->reset = virtio_ccw_reset;
1128     dc->props = virtio_ccw_scsi_properties;
1129 }
1130
1131 static const TypeInfo virtio_ccw_scsi = {
1132     .name          = TYPE_VIRTIO_SCSI_CCW,
1133     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1134     .instance_size = sizeof(VirtIOSCSICcw),
1135     .instance_init = virtio_ccw_scsi_instance_init,
1136     .class_init    = virtio_ccw_scsi_class_init,
1137 };
1138
1139 #ifdef CONFIG_VHOST_SCSI
1140 static Property vhost_ccw_scsi_properties[] = {
1141     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1142     DEFINE_VHOST_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
1143     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1144     DEFINE_PROP_END_OF_LIST(),
1145 };
1146
1147 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
1148 {
1149     DeviceClass *dc = DEVICE_CLASS(klass);
1150     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1151
1152     k->init = vhost_ccw_scsi_init;
1153     k->exit = virtio_ccw_exit;
1154     dc->reset = virtio_ccw_reset;
1155     dc->props = vhost_ccw_scsi_properties;
1156 }
1157
1158 static const TypeInfo vhost_ccw_scsi = {
1159     .name          = TYPE_VHOST_SCSI_CCW,
1160     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1161     .instance_size = sizeof(VirtIOSCSICcw),
1162     .instance_init = vhost_ccw_scsi_instance_init,
1163     .class_init    = vhost_ccw_scsi_class_init,
1164 };
1165 #endif
1166
1167 static void virtio_ccw_rng_instance_init(Object *obj)
1168 {
1169     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
1170     object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_RNG);
1171     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1172     object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
1173                              (Object **)&dev->vdev.conf.rng, NULL);
1174 }
1175
1176 static Property virtio_ccw_rng_properties[] = {
1177     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1178     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1179     DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORNGCcw, vdev.conf),
1180     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1181                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1182     DEFINE_PROP_END_OF_LIST(),
1183 };
1184
1185 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
1186 {
1187     DeviceClass *dc = DEVICE_CLASS(klass);
1188     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1189
1190     k->init = virtio_ccw_rng_init;
1191     k->exit = virtio_ccw_exit;
1192     dc->reset = virtio_ccw_reset;
1193     dc->props = virtio_ccw_rng_properties;
1194 }
1195
1196 static const TypeInfo virtio_ccw_rng = {
1197     .name          = TYPE_VIRTIO_RNG_CCW,
1198     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1199     .instance_size = sizeof(VirtIORNGCcw),
1200     .instance_init = virtio_ccw_rng_instance_init,
1201     .class_init    = virtio_ccw_rng_class_init,
1202 };
1203
1204 static int virtio_ccw_busdev_init(DeviceState *dev)
1205 {
1206     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1207     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1208
1209     virtio_ccw_bus_new(&_dev->bus, _dev);
1210
1211     return _info->init(_dev);
1212 }
1213
1214 static int virtio_ccw_busdev_exit(DeviceState *dev)
1215 {
1216     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1217     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1218
1219     return _info->exit(_dev);
1220 }
1221
1222 static int virtio_ccw_busdev_unplug(DeviceState *dev)
1223 {
1224     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1225     SubchDev *sch = _dev->sch;
1226
1227     /*
1228      * We should arrive here only for device_del, since we don't support
1229      * direct hot(un)plug of channels, but only through virtio.
1230      */
1231     assert(sch != NULL);
1232     /* Subchannel is now disabled and no longer valid. */
1233     sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
1234                                      PMCW_FLAGS_MASK_DNV);
1235
1236     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
1237
1238     qdev_free(dev);
1239     return 0;
1240 }
1241
1242 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1243 {
1244     DeviceClass *dc = DEVICE_CLASS(klass);
1245
1246     dc->init = virtio_ccw_busdev_init;
1247     dc->exit = virtio_ccw_busdev_exit;
1248     dc->unplug = virtio_ccw_busdev_unplug;
1249     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1250
1251 }
1252
1253 static const TypeInfo virtio_ccw_device_info = {
1254     .name = TYPE_VIRTIO_CCW_DEVICE,
1255     .parent = TYPE_DEVICE,
1256     .instance_size = sizeof(VirtioCcwDevice),
1257     .class_init = virtio_ccw_device_class_init,
1258     .class_size = sizeof(VirtIOCCWDeviceClass),
1259     .abstract = true,
1260 };
1261
1262 /***************** Virtual-css Bus Bridge Device ********************/
1263 /* Only required to have the virtio bus as child in the system bus */
1264
1265 static int virtual_css_bridge_init(SysBusDevice *dev)
1266 {
1267     /* nothing */
1268     return 0;
1269 }
1270
1271 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
1272 {
1273     DeviceClass *dc = DEVICE_CLASS(klass);
1274     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1275
1276     k->init = virtual_css_bridge_init;
1277     dc->no_user = 1;
1278 }
1279
1280 static const TypeInfo virtual_css_bridge_info = {
1281     .name          = "virtual-css-bridge",
1282     .parent        = TYPE_SYS_BUS_DEVICE,
1283     .instance_size = sizeof(SysBusDevice),
1284     .class_init    = virtual_css_bridge_class_init,
1285 };
1286
1287 /* virtio-ccw-bus */
1288
1289 static void virtio_ccw_bus_new(VirtioBusState *bus, VirtioCcwDevice *dev)
1290 {
1291     DeviceState *qdev = DEVICE(dev);
1292     BusState *qbus;
1293     char virtio_bus_name[] = "virtio-bus";
1294
1295     qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_CCW_BUS, qdev,
1296                         virtio_bus_name);
1297     qbus = BUS(bus);
1298     qbus->allow_hotplug = 1;
1299 }
1300
1301 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1302 {
1303     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1304     BusClass *bus_class = BUS_CLASS(klass);
1305
1306     bus_class->max_dev = 1;
1307     k->notify = virtio_ccw_notify;
1308     k->get_features = virtio_ccw_get_features;
1309     k->vmstate_change = virtio_ccw_vmstate_change;
1310     k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1311     k->set_host_notifier = virtio_ccw_set_host_notifier;
1312     k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1313 }
1314
1315 static const TypeInfo virtio_ccw_bus_info = {
1316     .name = TYPE_VIRTIO_CCW_BUS,
1317     .parent = TYPE_VIRTIO_BUS,
1318     .instance_size = sizeof(VirtioCcwBusState),
1319     .class_init = virtio_ccw_bus_class_init,
1320 };
1321
1322 static void virtio_ccw_register(void)
1323 {
1324     type_register_static(&virtio_ccw_bus_info);
1325     type_register_static(&virtual_css_bus_info);
1326     type_register_static(&virtio_ccw_device_info);
1327     type_register_static(&virtio_ccw_serial);
1328     type_register_static(&virtio_ccw_blk);
1329     type_register_static(&virtio_ccw_net);
1330     type_register_static(&virtio_ccw_balloon);
1331     type_register_static(&virtio_ccw_scsi);
1332 #ifdef CONFIG_VHOST_SCSI
1333     type_register_static(&vhost_ccw_scsi);
1334 #endif
1335     type_register_static(&virtio_ccw_rng);
1336     type_register_static(&virtual_css_bridge_info);
1337 }
1338
1339 type_init(virtio_ccw_register)