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, size_t bus_size,
  31                                VirtioCcwDevice *dev);
  32
  33 static int virtual_css_bus_reset(BusState *qbus)
  34 {
  35     /* This should actually be modelled via the generic css */
  36     css_reset();
  37
  38     /* we dont traverse ourself, return 0 */
  39     return 0;
  40 }
  41
  42
  43 static void virtual_css_bus_class_init(ObjectClass *klass, void *data)
  44 {
  45     BusClass *k = BUS_CLASS(klass);
  46
  47     k->reset = virtual_css_bus_reset;
  48 }
  49
  50 static const TypeInfo virtual_css_bus_info = {
  51     .name = TYPE_VIRTUAL_CSS_BUS,
  52     .parent = TYPE_BUS,
  53     .instance_size = sizeof(VirtualCssBus),
  54     .class_init = virtual_css_bus_class_init,
  55 };
  56
  57 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
  58 {
  59     VirtIODevice *vdev = NULL;
  60
  61     if (sch->driver_data) {
  62         vdev = ((VirtioCcwDevice *)sch->driver_data)->vdev;
  63     }
  64     return vdev;
  65 }
  66
  67 static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
  68                                               bool assign, bool set_handler)
  69 {
  70     VirtQueue *vq = virtio_get_queue(dev->vdev, n);
  71     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
  72     int r = 0;
  73     SubchDev *sch = dev->sch;
  74     uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
  75
  76     if (assign) {
  77         r = event_notifier_init(notifier, 1);
  78         if (r < 0) {
  79             error_report("%s: unable to init event notifier: %d", __func__, r);
  80             return r;
  81         }
  82         virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
  83         r = s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
  84         if (r < 0) {
  85             error_report("%s: unable to assign ioeventfd: %d", __func__, r);
  86             virtio_queue_set_host_notifier_fd_handler(vq, false, false);
  87             event_notifier_cleanup(notifier);
  88             return r;
  89         }
  90     } else {
  91         virtio_queue_set_host_notifier_fd_handler(vq, false, false);
  92         s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
  93         event_notifier_cleanup(notifier);
  94     }
  95     return r;
  96 }
  97
  98 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
  99 {
 100     int n, r;
 101
 102     if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) ||
 103         dev->ioeventfd_disabled ||
 104         dev->ioeventfd_started) {
 105         return;
 106     }
 107     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 108         if (!virtio_queue_get_num(dev->vdev, n)) {
 109             continue;
 110         }
 111         r = virtio_ccw_set_guest2host_notifier(dev, n, true, true);
 112         if (r < 0) {
 113             goto assign_error;
 114         }
 115     }
 116     dev->ioeventfd_started = true;
 117     return;
 118
 119   assign_error:
 120     while (--n >= 0) {
 121         if (!virtio_queue_get_num(dev->vdev, n)) {
 122             continue;
 123         }
 124         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 125         assert(r >= 0);
 126     }
 127     dev->ioeventfd_started = false;
 128     /* Disable ioeventfd for this device. */
 129     dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
 130     error_report("%s: failed. Fallback to userspace (slower).", __func__);
 131 }
 132
 133 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
 134 {
 135     int n, r;
 136
 137     if (!dev->ioeventfd_started) {
 138         return;
 139     }
 140     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 141         if (!virtio_queue_get_num(dev->vdev, n)) {
 142             continue;
 143         }
 144         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 145         assert(r >= 0);
 146     }
 147     dev->ioeventfd_started = false;
 148 }
 149
 150 VirtualCssBus *virtual_css_bus_init(void)
 151 {
 152     VirtualCssBus *cbus;
 153     BusState *bus;
 154     DeviceState *dev;
 155
 156     /* Create bridge device */
 157     dev = qdev_create(NULL, "virtual-css-bridge");
 158     qdev_init_nofail(dev);
 159
 160     /* Create bus on bridge device */
 161     bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
 162     cbus = VIRTUAL_CSS_BUS(bus);
 163
 164     /* Enable hotplugging */
 165     bus->allow_hotplug = 1;
 166
 167     return cbus;
 168 }
 169
 170 /* Communication blocks used by several channel commands. */
 171 typedef struct VqInfoBlock {
 172     uint64_t queue;
 173     uint32_t align;
 174     uint16_t index;
 175     uint16_t num;
 176 } QEMU_PACKED VqInfoBlock;
 177
 178 typedef struct VqConfigBlock {
 179     uint16_t index;
 180     uint16_t num_max;
 181 } QEMU_PACKED VqConfigBlock;
 182
 183 typedef struct VirtioFeatDesc {
 184     uint32_t features;
 185     uint8_t index;
 186 } QEMU_PACKED VirtioFeatDesc;
 187
 188 /* Specify where the virtqueues for the subchannel are in guest memory. */
 189 static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align,
 190                               uint16_t index, uint16_t num)
 191 {
 192     VirtioCcwDevice *dev = sch->driver_data;
 193
 194     if (index > VIRTIO_PCI_QUEUE_MAX) {
 195         return -EINVAL;
 196     }
 197
 198     /* Current code in virtio.c relies on 4K alignment. */
 199     if (addr && (align != 4096)) {
 200         return -EINVAL;
 201     }
 202
 203     if (!dev) {
 204         return -EINVAL;
 205     }
 206
 207     virtio_queue_set_addr(dev->vdev, index, addr);
 208     if (!addr) {
 209         virtio_queue_set_vector(dev->vdev, index, 0);
 210     } else {
 211         /* Fail if we don't have a big enough queue. */
 212         /* TODO: Add interface to handle vring.num changing */
 213         if (virtio_queue_get_num(dev->vdev, index) > num) {
 214             return -EINVAL;
 215         }
 216         virtio_queue_set_vector(dev->vdev, index, index);
 217     }
 218     /* tell notify handler in case of config change */
 219     dev->vdev->config_vector = VIRTIO_PCI_QUEUE_MAX;
 220     return 0;
 221 }
 222
 223 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
 224 {
 225     int ret;
 226     VqInfoBlock info;
 227     uint8_t status;
 228     VirtioFeatDesc features;
 229     void *config;
 230     hwaddr indicators;
 231     VqConfigBlock vq_config;
 232     VirtioCcwDevice *dev = sch->driver_data;
 233     bool check_len;
 234     int len;
 235     hwaddr hw_len;
 236
 237     if (!dev) {
 238         return -EINVAL;
 239     }
 240
 241     trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
 242                                    ccw.cmd_code);
 243     check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
 244
 245     /* Look at the command. */
 246     switch (ccw.cmd_code) {
 247     case CCW_CMD_SET_VQ:
 248         if (check_len) {
 249             if (ccw.count != sizeof(info)) {
 250                 ret = -EINVAL;
 251                 break;
 252             }
 253         } else if (ccw.count < sizeof(info)) {
 254             /* Can't execute command. */
 255             ret = -EINVAL;
 256             break;
 257         }
 258         if (!ccw.cda) {
 259             ret = -EFAULT;
 260         } else {
 261             info.queue = ldq_phys(ccw.cda);
 262             info.align = ldl_phys(ccw.cda + sizeof(info.queue));
 263             info.index = lduw_phys(ccw.cda + sizeof(info.queue)
 264                                    + sizeof(info.align));
 265             info.num = lduw_phys(ccw.cda + sizeof(info.queue)
 266                                  + sizeof(info.align)
 267                                  + sizeof(info.index));
 268             ret = virtio_ccw_set_vqs(sch, info.queue, info.align, info.index,
 269                                      info.num);
 270             sch->curr_status.scsw.count = 0;
 271         }
 272         break;
 273     case CCW_CMD_VDEV_RESET:
 274         virtio_ccw_stop_ioeventfd(dev);
 275         virtio_reset(dev->vdev);
 276         ret = 0;
 277         break;
 278     case CCW_CMD_READ_FEAT:
 279         if (check_len) {
 280             if (ccw.count != sizeof(features)) {
 281                 ret = -EINVAL;
 282                 break;
 283             }
 284         } else if (ccw.count < sizeof(features)) {
 285             /* Can't execute command. */
 286             ret = -EINVAL;
 287             break;
 288         }
 289         if (!ccw.cda) {
 290             ret = -EFAULT;
 291         } else {
 292             features.index = ldub_phys(ccw.cda + sizeof(features.features));
 293             if (features.index < ARRAY_SIZE(dev->host_features)) {
 294                 features.features = dev->host_features[features.index];
 295             } else {
 296                 /* Return zeroes if the guest supports more feature bits. */
 297                 features.features = 0;
 298             }
 299             stl_le_phys(ccw.cda, features.features);
 300             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 301             ret = 0;
 302         }
 303         break;
 304     case CCW_CMD_WRITE_FEAT:
 305         if (check_len) {
 306             if (ccw.count != sizeof(features)) {
 307                 ret = -EINVAL;
 308                 break;
 309             }
 310         } else if (ccw.count < sizeof(features)) {
 311             /* Can't execute command. */
 312             ret = -EINVAL;
 313             break;
 314         }
 315         if (!ccw.cda) {
 316             ret = -EFAULT;
 317         } else {
 318             features.index = ldub_phys(ccw.cda + sizeof(features.features));
 319             features.features = ldl_le_phys(ccw.cda);
 320             if (features.index < ARRAY_SIZE(dev->host_features)) {
 321                 virtio_bus_set_vdev_features(&dev->bus, features.features);
 322                 dev->vdev->guest_features = features.features;
 323             } else {
 324                 /*
 325                  * If the guest supports more feature bits, assert that it
 326                  * passes us zeroes for those we don't support.
 327                  */
 328                 if (features.features) {
 329                     fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n",
 330                             features.index, features.features);
 331                     /* XXX: do a unit check here? */
 332                 }
 333             }
 334             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 335             ret = 0;
 336         }
 337         break;
 338     case CCW_CMD_READ_CONF:
 339         if (check_len) {
 340             if (ccw.count > dev->vdev->config_len) {
 341                 ret = -EINVAL;
 342                 break;
 343             }
 344         }
 345         len = MIN(ccw.count, dev->vdev->config_len);
 346         if (!ccw.cda) {
 347             ret = -EFAULT;
 348         } else {
 349             virtio_bus_get_vdev_config(&dev->bus, dev->vdev->config);
 350             /* XXX config space endianness */
 351             cpu_physical_memory_write(ccw.cda, dev->vdev->config, len);
 352             sch->curr_status.scsw.count = ccw.count - len;
 353             ret = 0;
 354         }
 355         break;
 356     case CCW_CMD_WRITE_CONF:
 357         if (check_len) {
 358             if (ccw.count > dev->vdev->config_len) {
 359                 ret = -EINVAL;
 360                 break;
 361             }
 362         }
 363         len = MIN(ccw.count, dev->vdev->config_len);
 364         hw_len = len;
 365         if (!ccw.cda) {
 366             ret = -EFAULT;
 367         } else {
 368             config = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
 369             if (!config) {
 370                 ret = -EFAULT;
 371             } else {
 372                 len = hw_len;
 373                 /* XXX config space endianness */
 374                 memcpy(dev->vdev->config, config, len);
 375                 cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
 376                 virtio_bus_set_vdev_config(&dev->bus, dev->vdev->config);
 377                 sch->curr_status.scsw.count = ccw.count - len;
 378                 ret = 0;
 379             }
 380         }
 381         break;
 382     case CCW_CMD_WRITE_STATUS:
 383         if (check_len) {
 384             if (ccw.count != sizeof(status)) {
 385                 ret = -EINVAL;
 386                 break;
 387             }
 388         } else if (ccw.count < sizeof(status)) {
 389             /* Can't execute command. */
 390             ret = -EINVAL;
 391             break;
 392         }
 393         if (!ccw.cda) {
 394             ret = -EFAULT;
 395         } else {
 396             status = ldub_phys(ccw.cda);
 397             if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
 398                 virtio_ccw_stop_ioeventfd(dev);
 399             }
 400             virtio_set_status(dev->vdev, status);
 401             if (dev->vdev->status == 0) {
 402                 virtio_reset(dev->vdev);
 403             }
 404             if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
 405                 virtio_ccw_start_ioeventfd(dev);
 406             }
 407             sch->curr_status.scsw.count = ccw.count - sizeof(status);
 408             ret = 0;
 409         }
 410         break;
 411     case CCW_CMD_SET_IND:
 412         if (check_len) {
 413             if (ccw.count != sizeof(indicators)) {
 414                 ret = -EINVAL;
 415                 break;
 416             }
 417         } else if (ccw.count < sizeof(indicators)) {
 418             /* Can't execute command. */
 419             ret = -EINVAL;
 420             break;
 421         }
 422         if (!ccw.cda) {
 423             ret = -EFAULT;
 424         } else {
 425             indicators = ldq_phys(ccw.cda);
 426             dev->indicators = indicators;
 427             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 428             ret = 0;
 429         }
 430         break;
 431     case CCW_CMD_SET_CONF_IND:
 432         if (check_len) {
 433             if (ccw.count != sizeof(indicators)) {
 434                 ret = -EINVAL;
 435                 break;
 436             }
 437         } else if (ccw.count < sizeof(indicators)) {
 438             /* Can't execute command. */
 439             ret = -EINVAL;
 440             break;
 441         }
 442         if (!ccw.cda) {
 443             ret = -EFAULT;
 444         } else {
 445             indicators = ldq_phys(ccw.cda);
 446             dev->indicators2 = indicators;
 447             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 448             ret = 0;
 449         }
 450         break;
 451     case CCW_CMD_READ_VQ_CONF:
 452         if (check_len) {
 453             if (ccw.count != sizeof(vq_config)) {
 454                 ret = -EINVAL;
 455                 break;
 456             }
 457         } else if (ccw.count < sizeof(vq_config)) {
 458             /* Can't execute command. */
 459             ret = -EINVAL;
 460             break;
 461         }
 462         if (!ccw.cda) {
 463             ret = -EFAULT;
 464         } else {
 465             vq_config.index = lduw_phys(ccw.cda);
 466             vq_config.num_max = virtio_queue_get_num(dev->vdev,
 467                                                      vq_config.index);
 468             stw_phys(ccw.cda + sizeof(vq_config.index), vq_config.num_max);
 469             sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
 470             ret = 0;
 471         }
 472         break;
 473     default:
 474         ret = -ENOSYS;
 475         break;
 476     }
 477     return ret;
 478 }
 479
 480 static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev)
 481 {
 482     unsigned int cssid = 0;
 483     unsigned int ssid = 0;
 484     unsigned int schid;
 485     unsigned int devno;
 486     bool have_devno = false;
 487     bool found = false;
 488     SubchDev *sch;
 489     int ret;
 490     int num;
 491     DeviceState *parent = DEVICE(dev);
 492
 493     sch = g_malloc0(sizeof(SubchDev));
 494
 495     sch->driver_data = dev;
 496     dev->sch = sch;
 497
 498     dev->vdev = vdev;
 499     dev->indicators = 0;
 500
 501     /* Initialize subchannel structure. */
 502     sch->channel_prog = 0x0;
 503     sch->last_cmd_valid = false;
 504     sch->orb = NULL;
 505     /*
 506      * Use a device number if provided. Otherwise, fall back to subchannel
 507      * number.
 508      */
 509     if (dev->bus_id) {
 510         num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno);
 511         if (num == 3) {
 512             if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
 513                 ret = -EINVAL;
 514                 error_report("Invalid cssid or ssid: cssid %x, ssid %x",
 515                              cssid, ssid);
 516                 goto out_err;
 517             }
 518             /* Enforce use of virtual cssid. */
 519             if (cssid != VIRTUAL_CSSID) {
 520                 ret = -EINVAL;
 521                 error_report("cssid %x not valid for virtio devices", cssid);
 522                 goto out_err;
 523             }
 524             if (css_devno_used(cssid, ssid, devno)) {
 525                 ret = -EEXIST;
 526                 error_report("Device %x.%x.%04x already exists", cssid, ssid,
 527                              devno);
 528                 goto out_err;
 529             }
 530             sch->cssid = cssid;
 531             sch->ssid = ssid;
 532             sch->devno = devno;
 533             have_devno = true;
 534         } else {
 535             ret = -EINVAL;
 536             error_report("Malformed devno parameter '%s'", dev->bus_id);
 537             goto out_err;
 538         }
 539     }
 540
 541     /* Find the next free id. */
 542     if (have_devno) {
 543         for (schid = 0; schid <= MAX_SCHID; schid++) {
 544             if (!css_find_subch(1, cssid, ssid, schid)) {
 545                 sch->schid = schid;
 546                 css_subch_assign(cssid, ssid, schid, devno, sch);
 547                 found = true;
 548                 break;
 549             }
 550         }
 551         if (!found) {
 552             ret = -ENODEV;
 553             error_report("No free subchannel found for %x.%x.%04x", cssid, ssid,
 554                          devno);
 555             goto out_err;
 556         }
 557         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 558                                     "user-configured");
 559     } else {
 560         cssid = VIRTUAL_CSSID;
 561         for (ssid = 0; ssid <= MAX_SSID; ssid++) {
 562             for (schid = 0; schid <= MAX_SCHID; schid++) {
 563                 if (!css_find_subch(1, cssid, ssid, schid)) {
 564                     sch->cssid = cssid;
 565                     sch->ssid = ssid;
 566                     sch->schid = schid;
 567                     devno = schid;
 568                     /*
 569                      * If the devno is already taken, look further in this
 570                      * subchannel set.
 571                      */
 572                     while (css_devno_used(cssid, ssid, devno)) {
 573                         if (devno == MAX_SCHID) {
 574                             devno = 0;
 575                         } else if (devno == schid - 1) {
 576                             ret = -ENODEV;
 577                             error_report("No free devno found");
 578                             goto out_err;
 579                         } else {
 580                             devno++;
 581                         }
 582                     }
 583                     sch->devno = devno;
 584                     css_subch_assign(cssid, ssid, schid, devno, sch);
 585                     found = true;
 586                     break;
 587                 }
 588             }
 589             if (found) {
 590                 break;
 591             }
 592         }
 593         if (!found) {
 594             ret = -ENODEV;
 595             error_report("Virtual channel subsystem is full!");
 596             goto out_err;
 597         }
 598         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 599                                     "auto-configured");
 600     }
 601
 602     /* Build initial schib. */
 603     css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
 604
 605     sch->ccw_cb = virtio_ccw_cb;
 606
 607     /* Build senseid data. */
 608     memset(&sch->id, 0, sizeof(SenseId));
 609     sch->id.reserved = 0xff;
 610     sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
 611     sch->id.cu_model = dev->vdev->device_id;
 612
 613     /* Only the first 32 feature bits are used. */
 614     dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus,
 615                                                          dev->host_features[0]);
 616
 617     dev->host_features[0] |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 618     dev->host_features[0] |= 0x1 << VIRTIO_F_BAD_FEATURE;
 619
 620     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
 621                           parent->hotplugged, 1);
 622     return 0;
 623
 624 out_err:
 625     dev->sch = NULL;
 626     g_free(sch);
 627     return ret;
 628 }
 629
 630 static int virtio_ccw_exit(VirtioCcwDevice *dev)
 631 {
 632     SubchDev *sch = dev->sch;
 633
 634     virtio_ccw_stop_ioeventfd(dev);
 635     if (sch) {
 636         css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 637         g_free(sch);
 638     }
 639     dev->indicators = 0;
 640     return 0;
 641 }
 642
 643 static int virtio_ccw_net_init(VirtioCcwDevice *ccw_dev)
 644 {
 645     DeviceState *qdev = DEVICE(ccw_dev);
 646     VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev);
 647     DeviceState *vdev = DEVICE(&dev->vdev);
 648
 649     virtio_net_set_config_size(&dev->vdev, ccw_dev->host_features[0]);
 650     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
 651                                   object_get_typename(OBJECT(qdev)));
 652     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 653     if (qdev_init(vdev) < 0) {
 654         return -1;
 655     }
 656
 657     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 658 }
 659
 660 static void virtio_ccw_net_instance_init(Object *obj)
 661 {
 662     VirtIONetCcw *dev = VIRTIO_NET_CCW(obj);
 663     object_initialize(&dev->vdev, TYPE_VIRTIO_NET);
 664     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 665 }
 666
 667 static int virtio_ccw_blk_init(VirtioCcwDevice *ccw_dev)
 668 {
 669     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev);
 670     DeviceState *vdev = DEVICE(&dev->vdev);
 671     virtio_blk_set_conf(vdev, &(dev->blk));
 672     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 673     if (qdev_init(vdev) < 0) {
 674         return -1;
 675     }
 676
 677     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 678 }
 679
 680 static void virtio_ccw_blk_instance_init(Object *obj)
 681 {
 682     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj);
 683     object_initialize(&dev->vdev, TYPE_VIRTIO_BLK);
 684     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 685 }
 686
 687 static int virtio_ccw_serial_init(VirtioCcwDevice *ccw_dev)
 688 {
 689     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev);
 690     DeviceState *vdev = DEVICE(&dev->vdev);
 691     DeviceState *proxy = DEVICE(ccw_dev);
 692     char *bus_name;
 693
 694     /*
 695      * For command line compatibility, this sets the virtio-serial-device bus
 696      * name as before.
 697      */
 698     if (proxy->id) {
 699         bus_name = g_strdup_printf("%s.0", proxy->id);
 700         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
 701         g_free(bus_name);
 702     }
 703
 704     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 705     if (qdev_init(vdev) < 0) {
 706         return -1;
 707     }
 708
 709     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 710 }
 711
 712
 713 static void virtio_ccw_serial_instance_init(Object *obj)
 714 {
 715     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj);
 716     object_initialize(&dev->vdev, TYPE_VIRTIO_SERIAL);
 717     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 718 }
 719
 720 static int virtio_ccw_balloon_init(VirtioCcwDevice *ccw_dev)
 721 {
 722     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev);
 723     DeviceState *vdev = DEVICE(&dev->vdev);
 724
 725     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 726     if (qdev_init(vdev) < 0) {
 727         return -1;
 728     }
 729
 730     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 731 }
 732
 733 static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v,
 734                                       void *opaque, const char *name,
 735                                       Error **errp)
 736 {
 737     VirtIOBalloonCcw *dev = opaque;
 738     object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp);
 739 }
 740
 741 static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v,
 742                                                 void *opaque, const char *name,
 743                                                 Error **errp)
 744 {
 745     VirtIOBalloonCcw *dev = opaque;
 746     object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
 747                         errp);
 748 }
 749
 750 static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v,
 751                                                 void *opaque, const char *name,
 752                                                 Error **errp)
 753 {
 754     VirtIOBalloonCcw *dev = opaque;
 755     object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
 756                         errp);
 757 }
 758
 759 static void virtio_ccw_balloon_instance_init(Object *obj)
 760 {
 761     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj);
 762     object_initialize(&dev->vdev, TYPE_VIRTIO_BALLOON);
 763     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 764
 765     object_property_add(obj, "guest-stats", "guest statistics",
 766                         balloon_ccw_stats_get_all, NULL, NULL, dev, NULL);
 767
 768     object_property_add(obj, "guest-stats-polling-interval", "int",
 769                         balloon_ccw_stats_get_poll_interval,
 770                         balloon_ccw_stats_set_poll_interval,
 771                         NULL, dev, NULL);
 772 }
 773
 774 static int virtio_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
 775 {
 776     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev);
 777     DeviceState *vdev = DEVICE(&dev->vdev);
 778     DeviceState *qdev = DEVICE(ccw_dev);
 779     char *bus_name;
 780
 781     /*
 782      * For command line compatibility, this sets the virtio-scsi-device bus
 783      * name as before.
 784      */
 785     if (qdev->id) {
 786         bus_name = g_strdup_printf("%s.0", qdev->id);
 787         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
 788         g_free(bus_name);
 789     }
 790
 791     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 792     if (qdev_init(vdev) < 0) {
 793         return -1;
 794     }
 795
 796     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 797 }
 798
 799 static void virtio_ccw_scsi_instance_init(Object *obj)
 800 {
 801     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj);
 802     object_initialize(&dev->vdev, TYPE_VIRTIO_SCSI);
 803     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 804 }
 805
 806 #ifdef CONFIG_VHOST_SCSI
 807 static int vhost_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
 808 {
 809     VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
 810     DeviceState *vdev = DEVICE(&dev->vdev);
 811
 812     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 813     if (qdev_init(vdev) < 0) {
 814         return -1;
 815     }
 816
 817     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 818 }
 819
 820 static void vhost_ccw_scsi_instance_init(Object *obj)
 821 {
 822     VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
 823     object_initialize(&dev->vdev, TYPE_VHOST_SCSI);
 824     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 825 }
 826 #endif
 827
 828 static int virtio_ccw_rng_init(VirtioCcwDevice *ccw_dev)
 829 {
 830     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
 831     DeviceState *vdev = DEVICE(&dev->vdev);
 832
 833     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 834     if (qdev_init(vdev) < 0) {
 835         return -1;
 836     }
 837
 838     object_property_set_link(OBJECT(dev),
 839                              OBJECT(dev->vdev.conf.rng), "rng",
 840                              NULL);
 841
 842     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 843 }
 844
 845 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
 846  * be careful and test performance if you change this.
 847  */
 848 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
 849 {
 850     return container_of(d, VirtioCcwDevice, parent_obj);
 851 }
 852
 853 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
 854 {
 855     VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
 856     SubchDev *sch = dev->sch;
 857     uint64_t indicators;
 858
 859     if (vector >= 128) {
 860         return;
 861     }
 862
 863     if (vector < VIRTIO_PCI_QUEUE_MAX) {
 864         if (!dev->indicators) {
 865             return;
 866         }
 867         indicators = ldq_phys(dev->indicators);
 868         indicators |= 1ULL << vector;
 869         stq_phys(dev->indicators, indicators);
 870     } else {
 871         if (!dev->indicators2) {
 872             return;
 873         }
 874         vector = 0;
 875         indicators = ldq_phys(dev->indicators2);
 876         indicators |= 1ULL << vector;
 877         stq_phys(dev->indicators2, indicators);
 878     }
 879
 880     css_conditional_io_interrupt(sch);
 881
 882 }
 883
 884 static unsigned virtio_ccw_get_features(DeviceState *d)
 885 {
 886     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 887
 888     /* Only the first 32 feature bits are used. */
 889     return dev->host_features[0];
 890 }
 891
 892 static void virtio_ccw_reset(DeviceState *d)
 893 {
 894     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 895
 896     virtio_ccw_stop_ioeventfd(dev);
 897     virtio_reset(dev->vdev);
 898     css_reset_sch(dev->sch);
 899     dev->indicators = 0;
 900     dev->indicators2 = 0;
 901 }
 902
 903 static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
 904 {
 905     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 906
 907     if (running) {
 908         virtio_ccw_start_ioeventfd(dev);
 909     } else {
 910         virtio_ccw_stop_ioeventfd(dev);
 911     }
 912 }
 913
 914 static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
 915 {
 916     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 917
 918     return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
 919 }
 920
 921 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
 922 {
 923     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 924
 925     /* Stop using the generic ioeventfd, we are doing eventfd handling
 926      * ourselves below */
 927     dev->ioeventfd_disabled = assign;
 928     if (assign) {
 929         virtio_ccw_stop_ioeventfd(dev);
 930     }
 931     return virtio_ccw_set_guest2host_notifier(dev, n, assign, false);
 932 }
 933
 934 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
 935                                          bool assign, bool with_irqfd)
 936 {
 937     VirtQueue *vq = virtio_get_queue(dev->vdev, n);
 938     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 939     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(dev->vdev);
 940
 941     if (assign) {
 942         int r = event_notifier_init(notifier, 0);
 943
 944         if (r < 0) {
 945             return r;
 946         }
 947         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 948         /* We do not support irqfd for classic I/O interrupts, because the
 949          * classic interrupts are intermixed with the subchannel status, that
 950          * is queried with test subchannel. We want to use vhost, though.
 951          * Lets make sure to have vhost running and wire up the irq fd to
 952          * land in qemu (and only the irq fd) in this code.
 953          */
 954         if (k->guest_notifier_mask) {
 955             k->guest_notifier_mask(dev->vdev, n, false);
 956         }
 957         /* get lost events and re-inject */
 958         if (k->guest_notifier_pending &&
 959             k->guest_notifier_pending(dev->vdev, n)) {
 960             event_notifier_set(notifier);
 961         }
 962     } else {
 963         if (k->guest_notifier_mask) {
 964             k->guest_notifier_mask(dev->vdev, n, true);
 965         }
 966         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
 967         event_notifier_cleanup(notifier);
 968     }
 969     return 0;
 970 }
 971
 972 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
 973                                           bool assigned)
 974 {
 975     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 976     VirtIODevice *vdev = dev->vdev;
 977     int r, n;
 978
 979     for (n = 0; n < nvqs; n++) {
 980         if (!virtio_queue_get_num(vdev, n)) {
 981             break;
 982         }
 983         /* false -> true, as soon as irqfd works */
 984         r = virtio_ccw_set_guest_notifier(dev, n, assigned, false);
 985         if (r < 0) {
 986             goto assign_error;
 987         }
 988     }
 989     return 0;
 990
 991 assign_error:
 992     while (--n >= 0) {
 993         virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
 994     }
 995     return r;
 996 }
 997
 998 /**************** Virtio-ccw Bus Device Descriptions *******************/
 999
1000 static Property virtio_ccw_net_properties[] = {
1001     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1002     DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]),
1003     DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetCcw, vdev.net_conf),
1004     DEFINE_NIC_PROPERTIES(VirtIONetCcw, vdev.nic_conf),
1005     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1006                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1007     DEFINE_PROP_END_OF_LIST(),
1008 };
1009
1010 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
1011 {
1012     DeviceClass *dc = DEVICE_CLASS(klass);
1013     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1014
1015     k->init = virtio_ccw_net_init;
1016     k->exit = virtio_ccw_exit;
1017     dc->reset = virtio_ccw_reset;
1018     dc->props = virtio_ccw_net_properties;
1019 }
1020
1021 static const TypeInfo virtio_ccw_net = {
1022     .name          = TYPE_VIRTIO_NET_CCW,
1023     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1024     .instance_size = sizeof(VirtIONetCcw),
1025     .instance_init = virtio_ccw_net_instance_init,
1026     .class_init    = virtio_ccw_net_class_init,
1027 };
1028
1029 static Property virtio_ccw_blk_properties[] = {
1030     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1031     DEFINE_VIRTIO_BLK_FEATURES(VirtioCcwDevice, host_features[0]),
1032     DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkCcw, blk),
1033     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1034                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1035 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
1036     DEFINE_PROP_BIT("x-data-plane", VirtIOBlkCcw, blk.data_plane, 0, false),
1037 #endif
1038     DEFINE_PROP_END_OF_LIST(),
1039 };
1040
1041 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
1042 {
1043     DeviceClass *dc = DEVICE_CLASS(klass);
1044     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1045
1046     k->init = virtio_ccw_blk_init;
1047     k->exit = virtio_ccw_exit;
1048     dc->reset = virtio_ccw_reset;
1049     dc->props = virtio_ccw_blk_properties;
1050 }
1051
1052 static const TypeInfo virtio_ccw_blk = {
1053     .name          = TYPE_VIRTIO_BLK_CCW,
1054     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1055     .instance_size = sizeof(VirtIOBlkCcw),
1056     .instance_init = virtio_ccw_blk_instance_init,
1057     .class_init    = virtio_ccw_blk_class_init,
1058 };
1059
1060 static Property virtio_ccw_serial_properties[] = {
1061     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1062     DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtioSerialCcw, vdev.serial),
1063     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1064     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1065                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1066     DEFINE_PROP_END_OF_LIST(),
1067 };
1068
1069 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
1070 {
1071     DeviceClass *dc = DEVICE_CLASS(klass);
1072     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1073
1074     k->init = virtio_ccw_serial_init;
1075     k->exit = virtio_ccw_exit;
1076     dc->reset = virtio_ccw_reset;
1077     dc->props = virtio_ccw_serial_properties;
1078 }
1079
1080 static const TypeInfo virtio_ccw_serial = {
1081     .name          = TYPE_VIRTIO_SERIAL_CCW,
1082     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1083     .instance_size = sizeof(VirtioSerialCcw),
1084     .instance_init = virtio_ccw_serial_instance_init,
1085     .class_init    = virtio_ccw_serial_class_init,
1086 };
1087
1088 static Property virtio_ccw_balloon_properties[] = {
1089     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1090     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1091     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1092                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1093     DEFINE_PROP_END_OF_LIST(),
1094 };
1095
1096 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
1097 {
1098     DeviceClass *dc = DEVICE_CLASS(klass);
1099     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1100
1101     k->init = virtio_ccw_balloon_init;
1102     k->exit = virtio_ccw_exit;
1103     dc->reset = virtio_ccw_reset;
1104     dc->props = virtio_ccw_balloon_properties;
1105 }
1106
1107 static const TypeInfo virtio_ccw_balloon = {
1108     .name          = TYPE_VIRTIO_BALLOON_CCW,
1109     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1110     .instance_size = sizeof(VirtIOBalloonCcw),
1111     .instance_init = virtio_ccw_balloon_instance_init,
1112     .class_init    = virtio_ccw_balloon_class_init,
1113 };
1114
1115 static Property virtio_ccw_scsi_properties[] = {
1116     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1117     DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
1118     DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]),
1119     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1120                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1121     DEFINE_PROP_END_OF_LIST(),
1122 };
1123
1124 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
1125 {
1126     DeviceClass *dc = DEVICE_CLASS(klass);
1127     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1128
1129     k->init = virtio_ccw_scsi_init;
1130     k->exit = virtio_ccw_exit;
1131     dc->reset = virtio_ccw_reset;
1132     dc->props = virtio_ccw_scsi_properties;
1133 }
1134
1135 static const TypeInfo virtio_ccw_scsi = {
1136     .name          = TYPE_VIRTIO_SCSI_CCW,
1137     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1138     .instance_size = sizeof(VirtIOSCSICcw),
1139     .instance_init = virtio_ccw_scsi_instance_init,
1140     .class_init    = virtio_ccw_scsi_class_init,
1141 };
1142
1143 #ifdef CONFIG_VHOST_SCSI
1144 static Property vhost_ccw_scsi_properties[] = {
1145     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1146     DEFINE_VHOST_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
1147     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1148     DEFINE_PROP_END_OF_LIST(),
1149 };
1150
1151 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
1152 {
1153     DeviceClass *dc = DEVICE_CLASS(klass);
1154     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1155
1156     k->init = vhost_ccw_scsi_init;
1157     k->exit = virtio_ccw_exit;
1158     dc->reset = virtio_ccw_reset;
1159     dc->props = vhost_ccw_scsi_properties;
1160 }
1161
1162 static const TypeInfo vhost_ccw_scsi = {
1163     .name          = TYPE_VHOST_SCSI_CCW,
1164     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1165     .instance_size = sizeof(VirtIOSCSICcw),
1166     .instance_init = vhost_ccw_scsi_instance_init,
1167     .class_init    = vhost_ccw_scsi_class_init,
1168 };
1169 #endif
1170
1171 static void virtio_ccw_rng_instance_init(Object *obj)
1172 {
1173     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
1174     object_initialize(&dev->vdev, TYPE_VIRTIO_RNG);
1175     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1176     object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
1177                              (Object **)&dev->vdev.conf.rng, NULL);
1178 }
1179
1180 static Property virtio_ccw_rng_properties[] = {
1181     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1182     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1183     DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORNGCcw, vdev.conf),
1184     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1185                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1186     DEFINE_PROP_END_OF_LIST(),
1187 };
1188
1189 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
1190 {
1191     DeviceClass *dc = DEVICE_CLASS(klass);
1192     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1193
1194     k->init = virtio_ccw_rng_init;
1195     k->exit = virtio_ccw_exit;
1196     dc->reset = virtio_ccw_reset;
1197     dc->props = virtio_ccw_rng_properties;
1198 }
1199
1200 static const TypeInfo virtio_ccw_rng = {
1201     .name          = TYPE_VIRTIO_RNG_CCW,
1202     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1203     .instance_size = sizeof(VirtIORNGCcw),
1204     .instance_init = virtio_ccw_rng_instance_init,
1205     .class_init    = virtio_ccw_rng_class_init,
1206 };
1207
1208 static int virtio_ccw_busdev_init(DeviceState *dev)
1209 {
1210     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1211     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1212
1213     virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1214
1215     return _info->init(_dev);
1216 }
1217
1218 static int virtio_ccw_busdev_exit(DeviceState *dev)
1219 {
1220     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1221     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1222
1223     return _info->exit(_dev);
1224 }
1225
1226 static int virtio_ccw_busdev_unplug(DeviceState *dev)
1227 {
1228     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1229     SubchDev *sch = _dev->sch;
1230
1231     /*
1232      * We should arrive here only for device_del, since we don't support
1233      * direct hot(un)plug of channels, but only through virtio.
1234      */
1235     assert(sch != NULL);
1236     /* Subchannel is now disabled and no longer valid. */
1237     sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
1238                                      PMCW_FLAGS_MASK_DNV);
1239
1240     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
1241
1242     qdev_free(dev);
1243     return 0;
1244 }
1245
1246 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1247 {
1248     DeviceClass *dc = DEVICE_CLASS(klass);
1249
1250     dc->init = virtio_ccw_busdev_init;
1251     dc->exit = virtio_ccw_busdev_exit;
1252     dc->unplug = virtio_ccw_busdev_unplug;
1253     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1254
1255 }
1256
1257 static const TypeInfo virtio_ccw_device_info = {
1258     .name = TYPE_VIRTIO_CCW_DEVICE,
1259     .parent = TYPE_DEVICE,
1260     .instance_size = sizeof(VirtioCcwDevice),
1261     .class_init = virtio_ccw_device_class_init,
1262     .class_size = sizeof(VirtIOCCWDeviceClass),
1263     .abstract = true,
1264 };
1265
1266 /***************** Virtual-css Bus Bridge Device ********************/
1267 /* Only required to have the virtio bus as child in the system bus */
1268
1269 static int virtual_css_bridge_init(SysBusDevice *dev)
1270 {
1271     /* nothing */
1272     return 0;
1273 }
1274
1275 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
1276 {
1277     DeviceClass *dc = DEVICE_CLASS(klass);
1278     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1279
1280     k->init = virtual_css_bridge_init;
1281     dc->no_user = 1;
1282 }
1283
1284 static const TypeInfo virtual_css_bridge_info = {
1285     .name          = "virtual-css-bridge",
1286     .parent        = TYPE_SYS_BUS_DEVICE,
1287     .instance_size = sizeof(SysBusDevice),
1288     .class_init    = virtual_css_bridge_class_init,
1289 };
1290
1291 /* virtio-ccw-bus */
1292
1293 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1294                                VirtioCcwDevice *dev)
1295 {
1296     DeviceState *qdev = DEVICE(dev);
1297     BusState *qbus;
1298     char virtio_bus_name[] = "virtio-bus";
1299
1300     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1301                         qdev, virtio_bus_name);
1302     qbus = BUS(bus);
1303     qbus->allow_hotplug = 1;
1304 }
1305
1306 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1307 {
1308     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1309     BusClass *bus_class = BUS_CLASS(klass);
1310
1311     bus_class->max_dev = 1;
1312     k->notify = virtio_ccw_notify;
1313     k->get_features = virtio_ccw_get_features;
1314     k->vmstate_change = virtio_ccw_vmstate_change;
1315     k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1316     k->set_host_notifier = virtio_ccw_set_host_notifier;
1317     k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1318 }
1319
1320 static const TypeInfo virtio_ccw_bus_info = {
1321     .name = TYPE_VIRTIO_CCW_BUS,
1322     .parent = TYPE_VIRTIO_BUS,
1323     .instance_size = sizeof(VirtioCcwBusState),
1324     .class_init = virtio_ccw_bus_class_init,
1325 };
1326
1327 static void virtio_ccw_register(void)
1328 {
1329     type_register_static(&virtio_ccw_bus_info);
1330     type_register_static(&virtual_css_bus_info);
1331     type_register_static(&virtio_ccw_device_info);
1332     type_register_static(&virtio_ccw_serial);
1333     type_register_static(&virtio_ccw_blk);
1334     type_register_static(&virtio_ccw_net);
1335     type_register_static(&virtio_ccw_balloon);
1336     type_register_static(&virtio_ccw_scsi);
1337 #ifdef CONFIG_VHOST_SCSI
1338     type_register_static(&vhost_ccw_scsi);
1339 #endif
1340     type_register_static(&virtio_ccw_rng);
1341     type_register_static(&virtual_css_bridge_info);
1342 }
1343
1344 type_init(virtio_ccw_register)