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 void virtual_css_bus_reset(BusState *qbus)
  34 {
  35     /* This should actually be modelled via the generic css */
  36     css_reset();
  37 }
  38
  39
  40 static void virtual_css_bus_class_init(ObjectClass *klass, void *data)
  41 {
  42     BusClass *k = BUS_CLASS(klass);
  43
  44     k->reset = virtual_css_bus_reset;
  45 }
  46
  47 static const TypeInfo virtual_css_bus_info = {
  48     .name = TYPE_VIRTUAL_CSS_BUS,
  49     .parent = TYPE_BUS,
  50     .instance_size = sizeof(VirtualCssBus),
  51     .class_init = virtual_css_bus_class_init,
  52 };
  53
  54 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
  55 {
  56     VirtIODevice *vdev = NULL;
  57     VirtioCcwDevice *dev = sch->driver_data;
  58
  59     if (dev) {
  60         vdev = virtio_bus_get_device(&dev->bus);
  61     }
  62     return vdev;
  63 }
  64
  65 static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
  66                                               bool assign, bool set_handler)
  67 {
  68     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
  69     VirtQueue *vq = virtio_get_queue(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     VirtIODevice *vdev;
 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     vdev = virtio_bus_get_device(&dev->bus);
 108     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 109         if (!virtio_queue_get_num(vdev, n)) {
 110             continue;
 111         }
 112         r = virtio_ccw_set_guest2host_notifier(dev, n, true, true);
 113         if (r < 0) {
 114             goto assign_error;
 115         }
 116     }
 117     dev->ioeventfd_started = true;
 118     return;
 119
 120   assign_error:
 121     while (--n >= 0) {
 122         if (!virtio_queue_get_num(vdev, n)) {
 123             continue;
 124         }
 125         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 126         assert(r >= 0);
 127     }
 128     dev->ioeventfd_started = false;
 129     /* Disable ioeventfd for this device. */
 130     dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
 131     error_report("%s: failed. Fallback to userspace (slower).", __func__);
 132 }
 133
 134 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
 135 {
 136     VirtIODevice *vdev;
 137     int n, r;
 138
 139     if (!dev->ioeventfd_started) {
 140         return;
 141     }
 142     vdev = virtio_bus_get_device(&dev->bus);
 143     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 144         if (!virtio_queue_get_num(vdev, n)) {
 145             continue;
 146         }
 147         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 148         assert(r >= 0);
 149     }
 150     dev->ioeventfd_started = false;
 151 }
 152
 153 VirtualCssBus *virtual_css_bus_init(void)
 154 {
 155     VirtualCssBus *cbus;
 156     BusState *bus;
 157     DeviceState *dev;
 158
 159     /* Create bridge device */
 160     dev = qdev_create(NULL, "virtual-css-bridge");
 161     qdev_init_nofail(dev);
 162
 163     /* Create bus on bridge device */
 164     bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
 165     cbus = VIRTUAL_CSS_BUS(bus);
 166
 167     /* Enable hotplugging */
 168     bus->allow_hotplug = 1;
 169
 170     return cbus;
 171 }
 172
 173 /* Communication blocks used by several channel commands. */
 174 typedef struct VqInfoBlock {
 175     uint64_t queue;
 176     uint32_t align;
 177     uint16_t index;
 178     uint16_t num;
 179 } QEMU_PACKED VqInfoBlock;
 180
 181 typedef struct VqConfigBlock {
 182     uint16_t index;
 183     uint16_t num_max;
 184 } QEMU_PACKED VqConfigBlock;
 185
 186 typedef struct VirtioFeatDesc {
 187     uint32_t features;
 188     uint8_t index;
 189 } QEMU_PACKED VirtioFeatDesc;
 190
 191 /* Specify where the virtqueues for the subchannel are in guest memory. */
 192 static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align,
 193                               uint16_t index, uint16_t num)
 194 {
 195     VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
 196
 197     if (index > VIRTIO_PCI_QUEUE_MAX) {
 198         return -EINVAL;
 199     }
 200
 201     /* Current code in virtio.c relies on 4K alignment. */
 202     if (addr && (align != 4096)) {
 203         return -EINVAL;
 204     }
 205
 206     if (!vdev) {
 207         return -EINVAL;
 208     }
 209
 210     virtio_queue_set_addr(vdev, index, addr);
 211     if (!addr) {
 212         virtio_queue_set_vector(vdev, index, 0);
 213     } else {
 214         /* Fail if we don't have a big enough queue. */
 215         /* TODO: Add interface to handle vring.num changing */
 216         if (virtio_queue_get_num(vdev, index) > num) {
 217             return -EINVAL;
 218         }
 219         virtio_queue_set_vector(vdev, index, index);
 220     }
 221     /* tell notify handler in case of config change */
 222     vdev->config_vector = VIRTIO_PCI_QUEUE_MAX;
 223     return 0;
 224 }
 225
 226 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
 227 {
 228     int ret;
 229     VqInfoBlock info;
 230     uint8_t status;
 231     VirtioFeatDesc features;
 232     void *config;
 233     hwaddr indicators;
 234     VqConfigBlock vq_config;
 235     VirtioCcwDevice *dev = sch->driver_data;
 236     VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
 237     bool check_len;
 238     int len;
 239     hwaddr hw_len;
 240
 241     if (!dev) {
 242         return -EINVAL;
 243     }
 244
 245     trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
 246                                    ccw.cmd_code);
 247     check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
 248
 249     /* Look at the command. */
 250     switch (ccw.cmd_code) {
 251     case CCW_CMD_SET_VQ:
 252         if (check_len) {
 253             if (ccw.count != sizeof(info)) {
 254                 ret = -EINVAL;
 255                 break;
 256             }
 257         } else if (ccw.count < sizeof(info)) {
 258             /* Can't execute command. */
 259             ret = -EINVAL;
 260             break;
 261         }
 262         if (!ccw.cda) {
 263             ret = -EFAULT;
 264         } else {
 265             info.queue = ldq_phys(&address_space_memory, ccw.cda);
 266             info.align = ldl_phys(&address_space_memory,
 267                                   ccw.cda + sizeof(info.queue));
 268             info.index = lduw_phys(ccw.cda + sizeof(info.queue)
 269                                    + sizeof(info.align));
 270             info.num = lduw_phys(ccw.cda + sizeof(info.queue)
 271                                  + sizeof(info.align)
 272                                  + sizeof(info.index));
 273             ret = virtio_ccw_set_vqs(sch, info.queue, info.align, info.index,
 274                                      info.num);
 275             sch->curr_status.scsw.count = 0;
 276         }
 277         break;
 278     case CCW_CMD_VDEV_RESET:
 279         virtio_ccw_stop_ioeventfd(dev);
 280         virtio_reset(vdev);
 281         ret = 0;
 282         break;
 283     case CCW_CMD_READ_FEAT:
 284         if (check_len) {
 285             if (ccw.count != sizeof(features)) {
 286                 ret = -EINVAL;
 287                 break;
 288             }
 289         } else if (ccw.count < sizeof(features)) {
 290             /* Can't execute command. */
 291             ret = -EINVAL;
 292             break;
 293         }
 294         if (!ccw.cda) {
 295             ret = -EFAULT;
 296         } else {
 297             features.index = ldub_phys(&address_space_memory,
 298                                        ccw.cda + sizeof(features.features));
 299             if (features.index < ARRAY_SIZE(dev->host_features)) {
 300                 features.features = dev->host_features[features.index];
 301             } else {
 302                 /* Return zeroes if the guest supports more feature bits. */
 303                 features.features = 0;
 304             }
 305             stl_le_phys(ccw.cda, features.features);
 306             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 307             ret = 0;
 308         }
 309         break;
 310     case CCW_CMD_WRITE_FEAT:
 311         if (check_len) {
 312             if (ccw.count != sizeof(features)) {
 313                 ret = -EINVAL;
 314                 break;
 315             }
 316         } else if (ccw.count < sizeof(features)) {
 317             /* Can't execute command. */
 318             ret = -EINVAL;
 319             break;
 320         }
 321         if (!ccw.cda) {
 322             ret = -EFAULT;
 323         } else {
 324             features.index = ldub_phys(&address_space_memory,
 325                                        ccw.cda + sizeof(features.features));
 326             features.features = ldl_le_phys(&address_space_memory, ccw.cda);
 327             if (features.index < ARRAY_SIZE(dev->host_features)) {
 328                 virtio_bus_set_vdev_features(&dev->bus, features.features);
 329                 vdev->guest_features = features.features;
 330             } else {
 331                 /*
 332                  * If the guest supports more feature bits, assert that it
 333                  * passes us zeroes for those we don't support.
 334                  */
 335                 if (features.features) {
 336                     fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n",
 337                             features.index, features.features);
 338                     /* XXX: do a unit check here? */
 339                 }
 340             }
 341             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 342             ret = 0;
 343         }
 344         break;
 345     case CCW_CMD_READ_CONF:
 346         if (check_len) {
 347             if (ccw.count > vdev->config_len) {
 348                 ret = -EINVAL;
 349                 break;
 350             }
 351         }
 352         len = MIN(ccw.count, vdev->config_len);
 353         if (!ccw.cda) {
 354             ret = -EFAULT;
 355         } else {
 356             virtio_bus_get_vdev_config(&dev->bus, vdev->config);
 357             /* XXX config space endianness */
 358             cpu_physical_memory_write(ccw.cda, vdev->config, len);
 359             sch->curr_status.scsw.count = ccw.count - len;
 360             ret = 0;
 361         }
 362         break;
 363     case CCW_CMD_WRITE_CONF:
 364         if (check_len) {
 365             if (ccw.count > vdev->config_len) {
 366                 ret = -EINVAL;
 367                 break;
 368             }
 369         }
 370         len = MIN(ccw.count, vdev->config_len);
 371         hw_len = len;
 372         if (!ccw.cda) {
 373             ret = -EFAULT;
 374         } else {
 375             config = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
 376             if (!config) {
 377                 ret = -EFAULT;
 378             } else {
 379                 len = hw_len;
 380                 /* XXX config space endianness */
 381                 memcpy(vdev->config, config, len);
 382                 cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
 383                 virtio_bus_set_vdev_config(&dev->bus, vdev->config);
 384                 sch->curr_status.scsw.count = ccw.count - len;
 385                 ret = 0;
 386             }
 387         }
 388         break;
 389     case CCW_CMD_WRITE_STATUS:
 390         if (check_len) {
 391             if (ccw.count != sizeof(status)) {
 392                 ret = -EINVAL;
 393                 break;
 394             }
 395         } else if (ccw.count < sizeof(status)) {
 396             /* Can't execute command. */
 397             ret = -EINVAL;
 398             break;
 399         }
 400         if (!ccw.cda) {
 401             ret = -EFAULT;
 402         } else {
 403             status = ldub_phys(&address_space_memory, ccw.cda);
 404             if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
 405                 virtio_ccw_stop_ioeventfd(dev);
 406             }
 407             virtio_set_status(vdev, status);
 408             if (vdev->status == 0) {
 409                 virtio_reset(vdev);
 410             }
 411             if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
 412                 virtio_ccw_start_ioeventfd(dev);
 413             }
 414             sch->curr_status.scsw.count = ccw.count - sizeof(status);
 415             ret = 0;
 416         }
 417         break;
 418     case CCW_CMD_SET_IND:
 419         if (check_len) {
 420             if (ccw.count != sizeof(indicators)) {
 421                 ret = -EINVAL;
 422                 break;
 423             }
 424         } else if (ccw.count < sizeof(indicators)) {
 425             /* Can't execute command. */
 426             ret = -EINVAL;
 427             break;
 428         }
 429         if (!ccw.cda) {
 430             ret = -EFAULT;
 431         } else {
 432             indicators = ldq_phys(&address_space_memory, ccw.cda);
 433             dev->indicators = indicators;
 434             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 435             ret = 0;
 436         }
 437         break;
 438     case CCW_CMD_SET_CONF_IND:
 439         if (check_len) {
 440             if (ccw.count != sizeof(indicators)) {
 441                 ret = -EINVAL;
 442                 break;
 443             }
 444         } else if (ccw.count < sizeof(indicators)) {
 445             /* Can't execute command. */
 446             ret = -EINVAL;
 447             break;
 448         }
 449         if (!ccw.cda) {
 450             ret = -EFAULT;
 451         } else {
 452             indicators = ldq_phys(&address_space_memory, ccw.cda);
 453             dev->indicators2 = indicators;
 454             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 455             ret = 0;
 456         }
 457         break;
 458     case CCW_CMD_READ_VQ_CONF:
 459         if (check_len) {
 460             if (ccw.count != sizeof(vq_config)) {
 461                 ret = -EINVAL;
 462                 break;
 463             }
 464         } else if (ccw.count < sizeof(vq_config)) {
 465             /* Can't execute command. */
 466             ret = -EINVAL;
 467             break;
 468         }
 469         if (!ccw.cda) {
 470             ret = -EFAULT;
 471         } else {
 472             vq_config.index = lduw_phys(ccw.cda);
 473             vq_config.num_max = virtio_queue_get_num(vdev,
 474                                                      vq_config.index);
 475             stw_phys(ccw.cda + sizeof(vq_config.index), vq_config.num_max);
 476             sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
 477             ret = 0;
 478         }
 479         break;
 480     default:
 481         ret = -ENOSYS;
 482         break;
 483     }
 484     return ret;
 485 }
 486
 487 static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev)
 488 {
 489     unsigned int cssid = 0;
 490     unsigned int ssid = 0;
 491     unsigned int schid;
 492     unsigned int devno;
 493     bool have_devno = false;
 494     bool found = false;
 495     SubchDev *sch;
 496     int ret;
 497     int num;
 498     DeviceState *parent = DEVICE(dev);
 499
 500     sch = g_malloc0(sizeof(SubchDev));
 501
 502     sch->driver_data = dev;
 503     dev->sch = sch;
 504
 505     dev->indicators = 0;
 506
 507     /* Initialize subchannel structure. */
 508     sch->channel_prog = 0x0;
 509     sch->last_cmd_valid = false;
 510     sch->orb = NULL;
 511     /*
 512      * Use a device number if provided. Otherwise, fall back to subchannel
 513      * number.
 514      */
 515     if (dev->bus_id) {
 516         num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno);
 517         if (num == 3) {
 518             if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
 519                 ret = -EINVAL;
 520                 error_report("Invalid cssid or ssid: cssid %x, ssid %x",
 521                              cssid, ssid);
 522                 goto out_err;
 523             }
 524             /* Enforce use of virtual cssid. */
 525             if (cssid != VIRTUAL_CSSID) {
 526                 ret = -EINVAL;
 527                 error_report("cssid %x not valid for virtio devices", cssid);
 528                 goto out_err;
 529             }
 530             if (css_devno_used(cssid, ssid, devno)) {
 531                 ret = -EEXIST;
 532                 error_report("Device %x.%x.%04x already exists", cssid, ssid,
 533                              devno);
 534                 goto out_err;
 535             }
 536             sch->cssid = cssid;
 537             sch->ssid = ssid;
 538             sch->devno = devno;
 539             have_devno = true;
 540         } else {
 541             ret = -EINVAL;
 542             error_report("Malformed devno parameter '%s'", dev->bus_id);
 543             goto out_err;
 544         }
 545     }
 546
 547     /* Find the next free id. */
 548     if (have_devno) {
 549         for (schid = 0; schid <= MAX_SCHID; schid++) {
 550             if (!css_find_subch(1, cssid, ssid, schid)) {
 551                 sch->schid = schid;
 552                 css_subch_assign(cssid, ssid, schid, devno, sch);
 553                 found = true;
 554                 break;
 555             }
 556         }
 557         if (!found) {
 558             ret = -ENODEV;
 559             error_report("No free subchannel found for %x.%x.%04x", cssid, ssid,
 560                          devno);
 561             goto out_err;
 562         }
 563         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 564                                     "user-configured");
 565     } else {
 566         cssid = VIRTUAL_CSSID;
 567         for (ssid = 0; ssid <= MAX_SSID; ssid++) {
 568             for (schid = 0; schid <= MAX_SCHID; schid++) {
 569                 if (!css_find_subch(1, cssid, ssid, schid)) {
 570                     sch->cssid = cssid;
 571                     sch->ssid = ssid;
 572                     sch->schid = schid;
 573                     devno = schid;
 574                     /*
 575                      * If the devno is already taken, look further in this
 576                      * subchannel set.
 577                      */
 578                     while (css_devno_used(cssid, ssid, devno)) {
 579                         if (devno == MAX_SCHID) {
 580                             devno = 0;
 581                         } else if (devno == schid - 1) {
 582                             ret = -ENODEV;
 583                             error_report("No free devno found");
 584                             goto out_err;
 585                         } else {
 586                             devno++;
 587                         }
 588                     }
 589                     sch->devno = devno;
 590                     css_subch_assign(cssid, ssid, schid, devno, sch);
 591                     found = true;
 592                     break;
 593                 }
 594             }
 595             if (found) {
 596                 break;
 597             }
 598         }
 599         if (!found) {
 600             ret = -ENODEV;
 601             error_report("Virtual channel subsystem is full!");
 602             goto out_err;
 603         }
 604         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 605                                     "auto-configured");
 606     }
 607
 608     /* Build initial schib. */
 609     css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
 610
 611     sch->ccw_cb = virtio_ccw_cb;
 612
 613     /* Build senseid data. */
 614     memset(&sch->id, 0, sizeof(SenseId));
 615     sch->id.reserved = 0xff;
 616     sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
 617     sch->id.cu_model = vdev->device_id;
 618
 619     /* Only the first 32 feature bits are used. */
 620     dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus,
 621                                                          dev->host_features[0]);
 622
 623     dev->host_features[0] |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 624     dev->host_features[0] |= 0x1 << VIRTIO_F_BAD_FEATURE;
 625
 626     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
 627                           parent->hotplugged, 1);
 628     return 0;
 629
 630 out_err:
 631     dev->sch = NULL;
 632     g_free(sch);
 633     return ret;
 634 }
 635
 636 static int virtio_ccw_exit(VirtioCcwDevice *dev)
 637 {
 638     SubchDev *sch = dev->sch;
 639
 640     if (sch) {
 641         css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 642         g_free(sch);
 643     }
 644     dev->indicators = 0;
 645     return 0;
 646 }
 647
 648 static int virtio_ccw_net_init(VirtioCcwDevice *ccw_dev)
 649 {
 650     DeviceState *qdev = DEVICE(ccw_dev);
 651     VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev);
 652     DeviceState *vdev = DEVICE(&dev->vdev);
 653
 654     virtio_net_set_config_size(&dev->vdev, ccw_dev->host_features[0]);
 655     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
 656                                   object_get_typename(OBJECT(qdev)));
 657     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 658     if (qdev_init(vdev) < 0) {
 659         return -1;
 660     }
 661
 662     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 663 }
 664
 665 static void virtio_ccw_net_instance_init(Object *obj)
 666 {
 667     VirtIONetCcw *dev = VIRTIO_NET_CCW(obj);
 668     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET);
 669     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 670 }
 671
 672 static int virtio_ccw_blk_init(VirtioCcwDevice *ccw_dev)
 673 {
 674     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev);
 675     DeviceState *vdev = DEVICE(&dev->vdev);
 676     virtio_blk_set_conf(vdev, &(dev->blk));
 677     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 678     if (qdev_init(vdev) < 0) {
 679         return -1;
 680     }
 681
 682     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 683 }
 684
 685 static void virtio_ccw_blk_instance_init(Object *obj)
 686 {
 687     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj);
 688     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK);
 689     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 690 }
 691
 692 static int virtio_ccw_serial_init(VirtioCcwDevice *ccw_dev)
 693 {
 694     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev);
 695     DeviceState *vdev = DEVICE(&dev->vdev);
 696     DeviceState *proxy = DEVICE(ccw_dev);
 697     char *bus_name;
 698
 699     /*
 700      * For command line compatibility, this sets the virtio-serial-device bus
 701      * name as before.
 702      */
 703     if (proxy->id) {
 704         bus_name = g_strdup_printf("%s.0", proxy->id);
 705         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
 706         g_free(bus_name);
 707     }
 708
 709     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 710     if (qdev_init(vdev) < 0) {
 711         return -1;
 712     }
 713
 714     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 715 }
 716
 717
 718 static void virtio_ccw_serial_instance_init(Object *obj)
 719 {
 720     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj);
 721     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL);
 722     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 723 }
 724
 725 static int virtio_ccw_balloon_init(VirtioCcwDevice *ccw_dev)
 726 {
 727     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev);
 728     DeviceState *vdev = DEVICE(&dev->vdev);
 729
 730     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 731     if (qdev_init(vdev) < 0) {
 732         return -1;
 733     }
 734
 735     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 736 }
 737
 738 static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v,
 739                                       void *opaque, const char *name,
 740                                       Error **errp)
 741 {
 742     VirtIOBalloonCcw *dev = opaque;
 743     object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp);
 744 }
 745
 746 static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v,
 747                                                 void *opaque, const char *name,
 748                                                 Error **errp)
 749 {
 750     VirtIOBalloonCcw *dev = opaque;
 751     object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
 752                         errp);
 753 }
 754
 755 static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v,
 756                                                 void *opaque, const char *name,
 757                                                 Error **errp)
 758 {
 759     VirtIOBalloonCcw *dev = opaque;
 760     object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
 761                         errp);
 762 }
 763
 764 static void virtio_ccw_balloon_instance_init(Object *obj)
 765 {
 766     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj);
 767     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON);
 768     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 769
 770     object_property_add(obj, "guest-stats", "guest statistics",
 771                         balloon_ccw_stats_get_all, NULL, NULL, dev, NULL);
 772
 773     object_property_add(obj, "guest-stats-polling-interval", "int",
 774                         balloon_ccw_stats_get_poll_interval,
 775                         balloon_ccw_stats_set_poll_interval,
 776                         NULL, dev, NULL);
 777 }
 778
 779 static int virtio_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
 780 {
 781     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev);
 782     DeviceState *vdev = DEVICE(&dev->vdev);
 783     DeviceState *qdev = DEVICE(ccw_dev);
 784     char *bus_name;
 785
 786     /*
 787      * For command line compatibility, this sets the virtio-scsi-device bus
 788      * name as before.
 789      */
 790     if (qdev->id) {
 791         bus_name = g_strdup_printf("%s.0", qdev->id);
 792         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
 793         g_free(bus_name);
 794     }
 795
 796     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 797     if (qdev_init(vdev) < 0) {
 798         return -1;
 799     }
 800
 801     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 802 }
 803
 804 static void virtio_ccw_scsi_instance_init(Object *obj)
 805 {
 806     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj);
 807     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI);
 808     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 809 }
 810
 811 #ifdef CONFIG_VHOST_SCSI
 812 static int vhost_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
 813 {
 814     VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
 815     DeviceState *vdev = DEVICE(&dev->vdev);
 816
 817     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 818     if (qdev_init(vdev) < 0) {
 819         return -1;
 820     }
 821
 822     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 823 }
 824
 825 static void vhost_ccw_scsi_instance_init(Object *obj)
 826 {
 827     VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
 828     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI);
 829     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 830 }
 831 #endif
 832
 833 static int virtio_ccw_rng_init(VirtioCcwDevice *ccw_dev)
 834 {
 835     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
 836     DeviceState *vdev = DEVICE(&dev->vdev);
 837
 838     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 839     if (qdev_init(vdev) < 0) {
 840         return -1;
 841     }
 842
 843     object_property_set_link(OBJECT(dev),
 844                              OBJECT(dev->vdev.conf.rng), "rng",
 845                              NULL);
 846
 847     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 848 }
 849
 850 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
 851  * be careful and test performance if you change this.
 852  */
 853 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
 854 {
 855     return container_of(d, VirtioCcwDevice, parent_obj);
 856 }
 857
 858 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
 859 {
 860     VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
 861     SubchDev *sch = dev->sch;
 862     uint64_t indicators;
 863
 864     if (vector >= 128) {
 865         return;
 866     }
 867
 868     if (vector < VIRTIO_PCI_QUEUE_MAX) {
 869         if (!dev->indicators) {
 870             return;
 871         }
 872         indicators = ldq_phys(&address_space_memory, dev->indicators);
 873         indicators |= 1ULL << vector;
 874         stq_phys(dev->indicators, indicators);
 875     } else {
 876         if (!dev->indicators2) {
 877             return;
 878         }
 879         vector = 0;
 880         indicators = ldq_phys(&address_space_memory, dev->indicators2);
 881         indicators |= 1ULL << vector;
 882         stq_phys(dev->indicators2, indicators);
 883     }
 884
 885     css_conditional_io_interrupt(sch);
 886
 887 }
 888
 889 static unsigned virtio_ccw_get_features(DeviceState *d)
 890 {
 891     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 892
 893     /* Only the first 32 feature bits are used. */
 894     return dev->host_features[0];
 895 }
 896
 897 static void virtio_ccw_reset(DeviceState *d)
 898 {
 899     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 900     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 901
 902     virtio_ccw_stop_ioeventfd(dev);
 903     virtio_reset(vdev);
 904     css_reset_sch(dev->sch);
 905     dev->indicators = 0;
 906     dev->indicators2 = 0;
 907 }
 908
 909 static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
 910 {
 911     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 912
 913     if (running) {
 914         virtio_ccw_start_ioeventfd(dev);
 915     } else {
 916         virtio_ccw_stop_ioeventfd(dev);
 917     }
 918 }
 919
 920 static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
 921 {
 922     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 923
 924     return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
 925 }
 926
 927 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
 928 {
 929     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 930
 931     /* Stop using the generic ioeventfd, we are doing eventfd handling
 932      * ourselves below */
 933     dev->ioeventfd_disabled = assign;
 934     if (assign) {
 935         virtio_ccw_stop_ioeventfd(dev);
 936     }
 937     return virtio_ccw_set_guest2host_notifier(dev, n, assign, false);
 938 }
 939
 940 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
 941                                          bool assign, bool with_irqfd)
 942 {
 943     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 944     VirtQueue *vq = virtio_get_queue(vdev, n);
 945     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 946     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 947
 948     if (assign) {
 949         int r = event_notifier_init(notifier, 0);
 950
 951         if (r < 0) {
 952             return r;
 953         }
 954         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 955         /* We do not support irqfd for classic I/O interrupts, because the
 956          * classic interrupts are intermixed with the subchannel status, that
 957          * is queried with test subchannel. We want to use vhost, though.
 958          * Lets make sure to have vhost running and wire up the irq fd to
 959          * land in qemu (and only the irq fd) in this code.
 960          */
 961         if (k->guest_notifier_mask) {
 962             k->guest_notifier_mask(vdev, n, false);
 963         }
 964         /* get lost events and re-inject */
 965         if (k->guest_notifier_pending &&
 966             k->guest_notifier_pending(vdev, n)) {
 967             event_notifier_set(notifier);
 968         }
 969     } else {
 970         if (k->guest_notifier_mask) {
 971             k->guest_notifier_mask(vdev, n, true);
 972         }
 973         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
 974         event_notifier_cleanup(notifier);
 975     }
 976     return 0;
 977 }
 978
 979 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
 980                                           bool assigned)
 981 {
 982     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 983     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 984     int r, n;
 985
 986     for (n = 0; n < nvqs; n++) {
 987         if (!virtio_queue_get_num(vdev, n)) {
 988             break;
 989         }
 990         /* false -> true, as soon as irqfd works */
 991         r = virtio_ccw_set_guest_notifier(dev, n, assigned, false);
 992         if (r < 0) {
 993             goto assign_error;
 994         }
 995     }
 996     return 0;
 997
 998 assign_error:
 999     while (--n >= 0) {
1000         virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
1001     }
1002     return r;
1003 }
1004
1005 /**************** Virtio-ccw Bus Device Descriptions *******************/
1006
1007 static Property virtio_ccw_net_properties[] = {
1008     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1009     DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]),
1010     DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetCcw, vdev.net_conf),
1011     DEFINE_NIC_PROPERTIES(VirtIONetCcw, vdev.nic_conf),
1012     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1013                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1014     DEFINE_PROP_END_OF_LIST(),
1015 };
1016
1017 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
1018 {
1019     DeviceClass *dc = DEVICE_CLASS(klass);
1020     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1021
1022     k->init = virtio_ccw_net_init;
1023     k->exit = virtio_ccw_exit;
1024     dc->reset = virtio_ccw_reset;
1025     dc->props = virtio_ccw_net_properties;
1026 }
1027
1028 static const TypeInfo virtio_ccw_net = {
1029     .name          = TYPE_VIRTIO_NET_CCW,
1030     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1031     .instance_size = sizeof(VirtIONetCcw),
1032     .instance_init = virtio_ccw_net_instance_init,
1033     .class_init    = virtio_ccw_net_class_init,
1034 };
1035
1036 static Property virtio_ccw_blk_properties[] = {
1037     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1038     DEFINE_VIRTIO_BLK_FEATURES(VirtioCcwDevice, host_features[0]),
1039     DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkCcw, blk),
1040     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1041                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1042 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
1043     DEFINE_PROP_BIT("x-data-plane", VirtIOBlkCcw, blk.data_plane, 0, false),
1044 #endif
1045     DEFINE_PROP_END_OF_LIST(),
1046 };
1047
1048 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
1049 {
1050     DeviceClass *dc = DEVICE_CLASS(klass);
1051     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1052
1053     k->init = virtio_ccw_blk_init;
1054     k->exit = virtio_ccw_exit;
1055     dc->reset = virtio_ccw_reset;
1056     dc->props = virtio_ccw_blk_properties;
1057 }
1058
1059 static const TypeInfo virtio_ccw_blk = {
1060     .name          = TYPE_VIRTIO_BLK_CCW,
1061     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1062     .instance_size = sizeof(VirtIOBlkCcw),
1063     .instance_init = virtio_ccw_blk_instance_init,
1064     .class_init    = virtio_ccw_blk_class_init,
1065 };
1066
1067 static Property virtio_ccw_serial_properties[] = {
1068     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1069     DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtioSerialCcw, vdev.serial),
1070     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1071     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1072                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1073     DEFINE_PROP_END_OF_LIST(),
1074 };
1075
1076 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
1077 {
1078     DeviceClass *dc = DEVICE_CLASS(klass);
1079     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1080
1081     k->init = virtio_ccw_serial_init;
1082     k->exit = virtio_ccw_exit;
1083     dc->reset = virtio_ccw_reset;
1084     dc->props = virtio_ccw_serial_properties;
1085 }
1086
1087 static const TypeInfo virtio_ccw_serial = {
1088     .name          = TYPE_VIRTIO_SERIAL_CCW,
1089     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1090     .instance_size = sizeof(VirtioSerialCcw),
1091     .instance_init = virtio_ccw_serial_instance_init,
1092     .class_init    = virtio_ccw_serial_class_init,
1093 };
1094
1095 static Property virtio_ccw_balloon_properties[] = {
1096     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1097     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1098     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1099                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1100     DEFINE_PROP_END_OF_LIST(),
1101 };
1102
1103 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
1104 {
1105     DeviceClass *dc = DEVICE_CLASS(klass);
1106     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1107
1108     k->init = virtio_ccw_balloon_init;
1109     k->exit = virtio_ccw_exit;
1110     dc->reset = virtio_ccw_reset;
1111     dc->props = virtio_ccw_balloon_properties;
1112 }
1113
1114 static const TypeInfo virtio_ccw_balloon = {
1115     .name          = TYPE_VIRTIO_BALLOON_CCW,
1116     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1117     .instance_size = sizeof(VirtIOBalloonCcw),
1118     .instance_init = virtio_ccw_balloon_instance_init,
1119     .class_init    = virtio_ccw_balloon_class_init,
1120 };
1121
1122 static Property virtio_ccw_scsi_properties[] = {
1123     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1124     DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
1125     DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]),
1126     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1127                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1128     DEFINE_PROP_END_OF_LIST(),
1129 };
1130
1131 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
1132 {
1133     DeviceClass *dc = DEVICE_CLASS(klass);
1134     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1135
1136     k->init = virtio_ccw_scsi_init;
1137     k->exit = virtio_ccw_exit;
1138     dc->reset = virtio_ccw_reset;
1139     dc->props = virtio_ccw_scsi_properties;
1140 }
1141
1142 static const TypeInfo virtio_ccw_scsi = {
1143     .name          = TYPE_VIRTIO_SCSI_CCW,
1144     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1145     .instance_size = sizeof(VirtIOSCSICcw),
1146     .instance_init = virtio_ccw_scsi_instance_init,
1147     .class_init    = virtio_ccw_scsi_class_init,
1148 };
1149
1150 #ifdef CONFIG_VHOST_SCSI
1151 static Property vhost_ccw_scsi_properties[] = {
1152     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1153     DEFINE_VHOST_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
1154     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1155     DEFINE_PROP_END_OF_LIST(),
1156 };
1157
1158 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
1159 {
1160     DeviceClass *dc = DEVICE_CLASS(klass);
1161     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1162
1163     k->init = vhost_ccw_scsi_init;
1164     k->exit = virtio_ccw_exit;
1165     dc->reset = virtio_ccw_reset;
1166     dc->props = vhost_ccw_scsi_properties;
1167 }
1168
1169 static const TypeInfo vhost_ccw_scsi = {
1170     .name          = TYPE_VHOST_SCSI_CCW,
1171     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1172     .instance_size = sizeof(VirtIOSCSICcw),
1173     .instance_init = vhost_ccw_scsi_instance_init,
1174     .class_init    = vhost_ccw_scsi_class_init,
1175 };
1176 #endif
1177
1178 static void virtio_ccw_rng_instance_init(Object *obj)
1179 {
1180     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
1181     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG);
1182     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1183     object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
1184                              (Object **)&dev->vdev.conf.rng, NULL);
1185 }
1186
1187 static Property virtio_ccw_rng_properties[] = {
1188     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1189     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1190     DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORNGCcw, vdev.conf),
1191     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1192                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1193     DEFINE_PROP_END_OF_LIST(),
1194 };
1195
1196 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
1197 {
1198     DeviceClass *dc = DEVICE_CLASS(klass);
1199     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1200
1201     k->init = virtio_ccw_rng_init;
1202     k->exit = virtio_ccw_exit;
1203     dc->reset = virtio_ccw_reset;
1204     dc->props = virtio_ccw_rng_properties;
1205 }
1206
1207 static const TypeInfo virtio_ccw_rng = {
1208     .name          = TYPE_VIRTIO_RNG_CCW,
1209     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1210     .instance_size = sizeof(VirtIORNGCcw),
1211     .instance_init = virtio_ccw_rng_instance_init,
1212     .class_init    = virtio_ccw_rng_class_init,
1213 };
1214
1215 static int virtio_ccw_busdev_init(DeviceState *dev)
1216 {
1217     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1218     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1219
1220     virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1221
1222     return _info->init(_dev);
1223 }
1224
1225 static int virtio_ccw_busdev_exit(DeviceState *dev)
1226 {
1227     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1228     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1229
1230     return _info->exit(_dev);
1231 }
1232
1233 static int virtio_ccw_busdev_unplug(DeviceState *dev)
1234 {
1235     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1236     SubchDev *sch = _dev->sch;
1237
1238     virtio_ccw_stop_ioeventfd(_dev);
1239
1240     /*
1241      * We should arrive here only for device_del, since we don't support
1242      * direct hot(un)plug of channels, but only through virtio.
1243      */
1244     assert(sch != NULL);
1245     /* Subchannel is now disabled and no longer valid. */
1246     sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
1247                                      PMCW_FLAGS_MASK_DNV);
1248
1249     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
1250
1251     object_unparent(OBJECT(dev));
1252     return 0;
1253 }
1254
1255 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1256 {
1257     DeviceClass *dc = DEVICE_CLASS(klass);
1258
1259     dc->init = virtio_ccw_busdev_init;
1260     dc->exit = virtio_ccw_busdev_exit;
1261     dc->unplug = virtio_ccw_busdev_unplug;
1262     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1263
1264 }
1265
1266 static const TypeInfo virtio_ccw_device_info = {
1267     .name = TYPE_VIRTIO_CCW_DEVICE,
1268     .parent = TYPE_DEVICE,
1269     .instance_size = sizeof(VirtioCcwDevice),
1270     .class_init = virtio_ccw_device_class_init,
1271     .class_size = sizeof(VirtIOCCWDeviceClass),
1272     .abstract = true,
1273 };
1274
1275 /***************** Virtual-css Bus Bridge Device ********************/
1276 /* Only required to have the virtio bus as child in the system bus */
1277
1278 static int virtual_css_bridge_init(SysBusDevice *dev)
1279 {
1280     /* nothing */
1281     return 0;
1282 }
1283
1284 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
1285 {
1286     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1287
1288     k->init = virtual_css_bridge_init;
1289 }
1290
1291 static const TypeInfo virtual_css_bridge_info = {
1292     .name          = "virtual-css-bridge",
1293     .parent        = TYPE_SYS_BUS_DEVICE,
1294     .instance_size = sizeof(SysBusDevice),
1295     .class_init    = virtual_css_bridge_class_init,
1296 };
1297
1298 /* virtio-ccw-bus */
1299
1300 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1301                                VirtioCcwDevice *dev)
1302 {
1303     DeviceState *qdev = DEVICE(dev);
1304     BusState *qbus;
1305     char virtio_bus_name[] = "virtio-bus";
1306
1307     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1308                         qdev, virtio_bus_name);
1309     qbus = BUS(bus);
1310     qbus->allow_hotplug = 1;
1311 }
1312
1313 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1314 {
1315     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1316     BusClass *bus_class = BUS_CLASS(klass);
1317
1318     bus_class->max_dev = 1;
1319     k->notify = virtio_ccw_notify;
1320     k->get_features = virtio_ccw_get_features;
1321     k->vmstate_change = virtio_ccw_vmstate_change;
1322     k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1323     k->set_host_notifier = virtio_ccw_set_host_notifier;
1324     k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1325 }
1326
1327 static const TypeInfo virtio_ccw_bus_info = {
1328     .name = TYPE_VIRTIO_CCW_BUS,
1329     .parent = TYPE_VIRTIO_BUS,
1330     .instance_size = sizeof(VirtioCcwBusState),
1331     .class_init = virtio_ccw_bus_class_init,
1332 };
1333
1334 static void virtio_ccw_register(void)
1335 {
1336     type_register_static(&virtio_ccw_bus_info);
1337     type_register_static(&virtual_css_bus_info);
1338     type_register_static(&virtio_ccw_device_info);
1339     type_register_static(&virtio_ccw_serial);
1340     type_register_static(&virtio_ccw_blk);
1341     type_register_static(&virtio_ccw_net);
1342     type_register_static(&virtio_ccw_balloon);
1343     type_register_static(&virtio_ccw_scsi);
1344 #ifdef CONFIG_VHOST_SCSI
1345     type_register_static(&vhost_ccw_scsi);
1346 #endif
1347     type_register_static(&virtio_ccw_rng);
1348     type_register_static(&virtual_css_bridge_info);
1349 }
1350
1351 type_init(virtio_ccw_register)