hw/s390x/virtio-ccw.c

   1 /*
   2  * virtio ccw target implementation
   3  *
   4  * Copyright 2012,2015 IBM Corp.
   5  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
   6  *            Pierre Morel <pmorel@linux.vnet.ibm.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   9  * your option) any later version. See the COPYING file in the top-level
  10  * directory.
  11  */
  12
  13 #include "hw/hw.h"
  14 #include "sysemu/block-backend.h"
  15 #include "sysemu/blockdev.h"
  16 #include "sysemu/sysemu.h"
  17 #include "net/net.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 "qemu/error-report.h"
  24 #include "hw/virtio/virtio-access.h"
  25 #include "hw/virtio/virtio-bus.h"
  26 #include "hw/s390x/adapter.h"
  27 #include "hw/s390x/s390_flic.h"
  28
  29 #include "ioinst.h"
  30 #include "css.h"
  31 #include "virtio-ccw.h"
  32 #include "trace.h"
  33
  34 static QTAILQ_HEAD(, IndAddr) indicator_addresses =
  35     QTAILQ_HEAD_INITIALIZER(indicator_addresses);
  36
  37 static IndAddr *get_indicator(hwaddr ind_addr, int len)
  38 {
  39     IndAddr *indicator;
  40
  41     QTAILQ_FOREACH(indicator, &indicator_addresses, sibling) {
  42         if (indicator->addr == ind_addr) {
  43             indicator->refcnt++;
  44             return indicator;
  45         }
  46     }
  47     indicator = g_new0(IndAddr, 1);
  48     indicator->addr = ind_addr;
  49     indicator->len = len;
  50     indicator->refcnt = 1;
  51     QTAILQ_INSERT_TAIL(&indicator_addresses, indicator, sibling);
  52     return indicator;
  53 }
  54
  55 static int s390_io_adapter_map(AdapterInfo *adapter, uint64_t map_addr,
  56                                bool do_map)
  57 {
  58     S390FLICState *fs = s390_get_flic();
  59     S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
  60
  61     return fsc->io_adapter_map(fs, adapter->adapter_id, map_addr, do_map);
  62 }
  63
  64 static void release_indicator(AdapterInfo *adapter, IndAddr *indicator)
  65 {
  66     assert(indicator->refcnt > 0);
  67     indicator->refcnt--;
  68     if (indicator->refcnt > 0) {
  69         return;
  70     }
  71     QTAILQ_REMOVE(&indicator_addresses, indicator, sibling);
  72     if (indicator->map) {
  73         s390_io_adapter_map(adapter, indicator->map, false);
  74     }
  75     g_free(indicator);
  76 }
  77
  78 static int map_indicator(AdapterInfo *adapter, IndAddr *indicator)
  79 {
  80     int ret;
  81
  82     if (indicator->map) {
  83         return 0; /* already mapped is not an error */
  84     }
  85     indicator->map = indicator->addr;
  86     ret = s390_io_adapter_map(adapter, indicator->map, true);
  87     if ((ret != 0) && (ret != -ENOSYS)) {
  88         goto out_err;
  89     }
  90     return 0;
  91
  92 out_err:
  93     indicator->map = 0;
  94     return ret;
  95 }
  96
  97 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
  98                                VirtioCcwDevice *dev);
  99
 100 static void virtual_css_bus_reset(BusState *qbus)
 101 {
 102     /* This should actually be modelled via the generic css */
 103     css_reset();
 104 }
 105
 106
 107 static void virtual_css_bus_class_init(ObjectClass *klass, void *data)
 108 {
 109     BusClass *k = BUS_CLASS(klass);
 110
 111     k->reset = virtual_css_bus_reset;
 112 }
 113
 114 static const TypeInfo virtual_css_bus_info = {
 115     .name = TYPE_VIRTUAL_CSS_BUS,
 116     .parent = TYPE_BUS,
 117     .instance_size = sizeof(VirtualCssBus),
 118     .class_init = virtual_css_bus_class_init,
 119 };
 120
 121 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
 122 {
 123     VirtIODevice *vdev = NULL;
 124     VirtioCcwDevice *dev = sch->driver_data;
 125
 126     if (dev) {
 127         vdev = virtio_bus_get_device(&dev->bus);
 128     }
 129     return vdev;
 130 }
 131
 132 static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
 133                                               bool assign, bool set_handler)
 134 {
 135     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 136     VirtQueue *vq = virtio_get_queue(vdev, n);
 137     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
 138     int r = 0;
 139     SubchDev *sch = dev->sch;
 140     uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
 141
 142     if (assign) {
 143         r = event_notifier_init(notifier, 1);
 144         if (r < 0) {
 145             error_report("%s: unable to init event notifier: %d", __func__, r);
 146             return r;
 147         }
 148         virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
 149         r = s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
 150         if (r < 0) {
 151             error_report("%s: unable to assign ioeventfd: %d", __func__, r);
 152             virtio_queue_set_host_notifier_fd_handler(vq, false, false);
 153             event_notifier_cleanup(notifier);
 154             return r;
 155         }
 156     } else {
 157         virtio_queue_set_host_notifier_fd_handler(vq, false, false);
 158         s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
 159         event_notifier_cleanup(notifier);
 160     }
 161     return r;
 162 }
 163
 164 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
 165 {
 166     VirtIODevice *vdev;
 167     int n, r;
 168
 169     if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) ||
 170         dev->ioeventfd_disabled ||
 171         dev->ioeventfd_started) {
 172         return;
 173     }
 174     vdev = virtio_bus_get_device(&dev->bus);
 175     for (n = 0; n < VIRTIO_CCW_QUEUE_MAX; n++) {
 176         if (!virtio_queue_get_num(vdev, n)) {
 177             continue;
 178         }
 179         r = virtio_ccw_set_guest2host_notifier(dev, n, true, true);
 180         if (r < 0) {
 181             goto assign_error;
 182         }
 183     }
 184     dev->ioeventfd_started = true;
 185     return;
 186
 187   assign_error:
 188     while (--n >= 0) {
 189         if (!virtio_queue_get_num(vdev, n)) {
 190             continue;
 191         }
 192         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 193         assert(r >= 0);
 194     }
 195     dev->ioeventfd_started = false;
 196     /* Disable ioeventfd for this device. */
 197     dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
 198     error_report("%s: failed. Fallback to userspace (slower).", __func__);
 199 }
 200
 201 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
 202 {
 203     VirtIODevice *vdev;
 204     int n, r;
 205
 206     if (!dev->ioeventfd_started) {
 207         return;
 208     }
 209     vdev = virtio_bus_get_device(&dev->bus);
 210     for (n = 0; n < VIRTIO_CCW_QUEUE_MAX; n++) {
 211         if (!virtio_queue_get_num(vdev, n)) {
 212             continue;
 213         }
 214         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 215         assert(r >= 0);
 216     }
 217     dev->ioeventfd_started = false;
 218 }
 219
 220 VirtualCssBus *virtual_css_bus_init(void)
 221 {
 222     VirtualCssBus *cbus;
 223     BusState *bus;
 224     DeviceState *dev;
 225
 226     /* Create bridge device */
 227     dev = qdev_create(NULL, "virtual-css-bridge");
 228     qdev_init_nofail(dev);
 229
 230     /* Create bus on bridge device */
 231     bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
 232     cbus = VIRTUAL_CSS_BUS(bus);
 233
 234     /* Enable hotplugging */
 235     qbus_set_hotplug_handler(bus, dev, &error_abort);
 236
 237     return cbus;
 238 }
 239
 240 /* Communication blocks used by several channel commands. */
 241 typedef struct VqInfoBlockLegacy {
 242     uint64_t queue;
 243     uint32_t align;
 244     uint16_t index;
 245     uint16_t num;
 246 } QEMU_PACKED VqInfoBlockLegacy;
 247
 248 typedef struct VqInfoBlock {
 249     uint64_t desc;
 250     uint32_t res0;
 251     uint16_t index;
 252     uint16_t num;
 253     uint64_t avail;
 254     uint64_t used;
 255 } QEMU_PACKED VqInfoBlock;
 256
 257 typedef struct VqConfigBlock {
 258     uint16_t index;
 259     uint16_t num_max;
 260 } QEMU_PACKED VqConfigBlock;
 261
 262 typedef struct VirtioFeatDesc {
 263     uint32_t features;
 264     uint8_t index;
 265 } QEMU_PACKED VirtioFeatDesc;
 266
 267 typedef struct VirtioThinintInfo {
 268     hwaddr summary_indicator;
 269     hwaddr device_indicator;
 270     uint64_t ind_bit;
 271     uint8_t isc;
 272 } QEMU_PACKED VirtioThinintInfo;
 273
 274 typedef struct VirtioRevInfo {
 275     uint16_t revision;
 276     uint16_t length;
 277     uint8_t data[0];
 278 } QEMU_PACKED VirtioRevInfo;
 279
 280 /* Specify where the virtqueues for the subchannel are in guest memory. */
 281 static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info,
 282                               VqInfoBlockLegacy *linfo)
 283 {
 284     VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
 285     uint16_t index = info ? info->index : linfo->index;
 286     uint16_t num = info ? info->num : linfo->num;
 287     uint64_t desc = info ? info->desc : linfo->queue;
 288
 289     if (index >= VIRTIO_CCW_QUEUE_MAX) {
 290         return -EINVAL;
 291     }
 292
 293     /* Current code in virtio.c relies on 4K alignment. */
 294     if (linfo && desc && (linfo->align != 4096)) {
 295         return -EINVAL;
 296     }
 297
 298     if (!vdev) {
 299         return -EINVAL;
 300     }
 301
 302     if (info) {
 303         virtio_queue_set_rings(vdev, index, desc, info->avail, info->used);
 304     } else {
 305         virtio_queue_set_addr(vdev, index, desc);
 306     }
 307     if (!desc) {
 308         virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR);
 309     } else {
 310         /* Fail if we don't have a big enough queue. */
 311         /* TODO: Add interface to handle vring.num changing */
 312         if (virtio_queue_get_num(vdev, index) > num) {
 313             return -EINVAL;
 314         }
 315         virtio_queue_set_vector(vdev, index, index);
 316     }
 317     /* tell notify handler in case of config change */
 318     vdev->config_vector = VIRTIO_CCW_QUEUE_MAX;
 319     return 0;
 320 }
 321
 322 static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev)
 323 {
 324     virtio_ccw_stop_ioeventfd(dev);
 325     virtio_reset(vdev);
 326     if (dev->indicators) {
 327         release_indicator(&dev->routes.adapter, dev->indicators);
 328         dev->indicators = NULL;
 329     }
 330     if (dev->indicators2) {
 331         release_indicator(&dev->routes.adapter, dev->indicators2);
 332         dev->indicators2 = NULL;
 333     }
 334     if (dev->summary_indicator) {
 335         release_indicator(&dev->routes.adapter, dev->summary_indicator);
 336         dev->summary_indicator = NULL;
 337     }
 338     dev->sch->thinint_active = false;
 339 }
 340
 341 static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len,
 342                                     bool is_legacy)
 343 {
 344     int ret;
 345     VqInfoBlock info;
 346     VqInfoBlockLegacy linfo;
 347     size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info);
 348
 349     if (check_len) {
 350         if (ccw.count != info_len) {
 351             return -EINVAL;
 352         }
 353     } else if (ccw.count < info_len) {
 354         /* Can't execute command. */
 355         return -EINVAL;
 356     }
 357     if (!ccw.cda) {
 358         return -EFAULT;
 359     }
 360     if (is_legacy) {
 361         linfo.queue = address_space_ldq_be(&address_space_memory, ccw.cda,
 362                                            MEMTXATTRS_UNSPECIFIED, NULL);
 363         linfo.align = address_space_ldl_be(&address_space_memory,
 364                                            ccw.cda + sizeof(linfo.queue),
 365                                            MEMTXATTRS_UNSPECIFIED,
 366                                            NULL);
 367         linfo.index = address_space_lduw_be(&address_space_memory,
 368                                             ccw.cda + sizeof(linfo.queue)
 369                                             + sizeof(linfo.align),
 370                                             MEMTXATTRS_UNSPECIFIED,
 371                                             NULL);
 372         linfo.num = address_space_lduw_be(&address_space_memory,
 373                                           ccw.cda + sizeof(linfo.queue)
 374                                           + sizeof(linfo.align)
 375                                           + sizeof(linfo.index),
 376                                           MEMTXATTRS_UNSPECIFIED,
 377                                           NULL);
 378         ret = virtio_ccw_set_vqs(sch, NULL, &linfo);
 379     } else {
 380         info.desc = address_space_ldq_be(&address_space_memory, ccw.cda,
 381                                            MEMTXATTRS_UNSPECIFIED, NULL);
 382         info.index = address_space_lduw_be(&address_space_memory,
 383                                            ccw.cda + sizeof(info.desc)
 384                                            + sizeof(info.res0),
 385                                            MEMTXATTRS_UNSPECIFIED, NULL);
 386         info.num = address_space_lduw_be(&address_space_memory,
 387                                          ccw.cda + sizeof(info.desc)
 388                                          + sizeof(info.res0)
 389                                          + sizeof(info.index),
 390                                          MEMTXATTRS_UNSPECIFIED, NULL);
 391         info.avail = address_space_ldq_be(&address_space_memory,
 392                                           ccw.cda + sizeof(info.desc)
 393                                           + sizeof(info.res0)
 394                                           + sizeof(info.index)
 395                                           + sizeof(info.num),
 396                                           MEMTXATTRS_UNSPECIFIED, NULL);
 397         info.used = address_space_ldq_be(&address_space_memory,
 398                                          ccw.cda + sizeof(info.desc)
 399                                          + sizeof(info.res0)
 400                                          + sizeof(info.index)
 401                                          + sizeof(info.num)
 402                                          + sizeof(info.avail),
 403                                          MEMTXATTRS_UNSPECIFIED, NULL);
 404         ret = virtio_ccw_set_vqs(sch, &info, NULL);
 405     }
 406     sch->curr_status.scsw.count = 0;
 407     return ret;
 408 }
 409
 410 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
 411 {
 412     int ret;
 413     VirtioRevInfo revinfo;
 414     uint8_t status;
 415     VirtioFeatDesc features;
 416     void *config;
 417     hwaddr indicators;
 418     VqConfigBlock vq_config;
 419     VirtioCcwDevice *dev = sch->driver_data;
 420     VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
 421     bool check_len;
 422     int len;
 423     hwaddr hw_len;
 424     VirtioThinintInfo *thinint;
 425
 426     if (!dev) {
 427         return -EINVAL;
 428     }
 429
 430     trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
 431                                    ccw.cmd_code);
 432     check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
 433
 434     /* Look at the command. */
 435     switch (ccw.cmd_code) {
 436     case CCW_CMD_SET_VQ:
 437         ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1);
 438         break;
 439     case CCW_CMD_VDEV_RESET:
 440         virtio_ccw_reset_virtio(dev, vdev);
 441         ret = 0;
 442         break;
 443     case CCW_CMD_READ_FEAT:
 444         if (check_len) {
 445             if (ccw.count != sizeof(features)) {
 446                 ret = -EINVAL;
 447                 break;
 448             }
 449         } else if (ccw.count < sizeof(features)) {
 450             /* Can't execute command. */
 451             ret = -EINVAL;
 452             break;
 453         }
 454         if (!ccw.cda) {
 455             ret = -EFAULT;
 456         } else {
 457             features.index = address_space_ldub(&address_space_memory,
 458                                                 ccw.cda
 459                                                 + sizeof(features.features),
 460                                                 MEMTXATTRS_UNSPECIFIED,
 461                                                 NULL);
 462             if (features.index == 0) {
 463                 features.features = (uint32_t)vdev->host_features;
 464             } else if (features.index == 1) {
 465                 features.features = (uint32_t)(vdev->host_features >> 32);
 466                 /*
 467                  * Don't offer version 1 to the guest if it did not
 468                  * negotiate at least revision 1.
 469                  */
 470                 if (dev->revision <= 0) {
 471                     features.features &= ~(1 << (VIRTIO_F_VERSION_1 - 32));
 472                 }
 473             } else {
 474                 /* Return zeroes if the guest supports more feature bits. */
 475                 features.features = 0;
 476             }
 477             address_space_stl_le(&address_space_memory, ccw.cda,
 478                                  features.features, MEMTXATTRS_UNSPECIFIED,
 479                                  NULL);
 480             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 481             ret = 0;
 482         }
 483         break;
 484     case CCW_CMD_WRITE_FEAT:
 485         if (check_len) {
 486             if (ccw.count != sizeof(features)) {
 487                 ret = -EINVAL;
 488                 break;
 489             }
 490         } else if (ccw.count < sizeof(features)) {
 491             /* Can't execute command. */
 492             ret = -EINVAL;
 493             break;
 494         }
 495         if (!ccw.cda) {
 496             ret = -EFAULT;
 497         } else {
 498             features.index = address_space_ldub(&address_space_memory,
 499                                                 ccw.cda
 500                                                 + sizeof(features.features),
 501                                                 MEMTXATTRS_UNSPECIFIED,
 502                                                 NULL);
 503             features.features = address_space_ldl_le(&address_space_memory,
 504                                                      ccw.cda,
 505                                                      MEMTXATTRS_UNSPECIFIED,
 506                                                      NULL);
 507             if (features.index == 0) {
 508                 virtio_set_features(vdev,
 509                                     (vdev->guest_features & 0xffffffff00000000ULL) |
 510                                     features.features);
 511             } else if (features.index == 1) {
 512                 /*
 513                  * The guest should not set version 1 if it didn't
 514                  * negotiate a revision >= 1.
 515                  */
 516                 if (dev->revision <= 0) {
 517                     features.features &= ~(1 << (VIRTIO_F_VERSION_1 - 32));
 518                 }
 519                 virtio_set_features(vdev,
 520                                     (vdev->guest_features & 0x00000000ffffffffULL) |
 521                                     ((uint64_t)features.features << 32));
 522             } else {
 523                 /*
 524                  * If the guest supports more feature bits, assert that it
 525                  * passes us zeroes for those we don't support.
 526                  */
 527                 if (features.features) {
 528                     fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n",
 529                             features.index, features.features);
 530                     /* XXX: do a unit check here? */
 531                 }
 532             }
 533             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 534             ret = 0;
 535         }
 536         break;
 537     case CCW_CMD_READ_CONF:
 538         if (check_len) {
 539             if (ccw.count > vdev->config_len) {
 540                 ret = -EINVAL;
 541                 break;
 542             }
 543         }
 544         len = MIN(ccw.count, vdev->config_len);
 545         if (!ccw.cda) {
 546             ret = -EFAULT;
 547         } else {
 548             virtio_bus_get_vdev_config(&dev->bus, vdev->config);
 549             /* XXX config space endianness */
 550             cpu_physical_memory_write(ccw.cda, vdev->config, len);
 551             sch->curr_status.scsw.count = ccw.count - len;
 552             ret = 0;
 553         }
 554         break;
 555     case CCW_CMD_WRITE_CONF:
 556         if (check_len) {
 557             if (ccw.count > vdev->config_len) {
 558                 ret = -EINVAL;
 559                 break;
 560             }
 561         }
 562         len = MIN(ccw.count, vdev->config_len);
 563         hw_len = len;
 564         if (!ccw.cda) {
 565             ret = -EFAULT;
 566         } else {
 567             config = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
 568             if (!config) {
 569                 ret = -EFAULT;
 570             } else {
 571                 len = hw_len;
 572                 /* XXX config space endianness */
 573                 memcpy(vdev->config, config, len);
 574                 cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
 575                 virtio_bus_set_vdev_config(&dev->bus, vdev->config);
 576                 sch->curr_status.scsw.count = ccw.count - len;
 577                 ret = 0;
 578             }
 579         }
 580         break;
 581     case CCW_CMD_WRITE_STATUS:
 582         if (check_len) {
 583             if (ccw.count != sizeof(status)) {
 584                 ret = -EINVAL;
 585                 break;
 586             }
 587         } else if (ccw.count < sizeof(status)) {
 588             /* Can't execute command. */
 589             ret = -EINVAL;
 590             break;
 591         }
 592         if (!ccw.cda) {
 593             ret = -EFAULT;
 594         } else {
 595             status = address_space_ldub(&address_space_memory, ccw.cda,
 596                                         MEMTXATTRS_UNSPECIFIED, NULL);
 597             if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
 598                 virtio_ccw_stop_ioeventfd(dev);
 599             }
 600             if (virtio_set_status(vdev, status) == 0) {
 601                 if (vdev->status == 0) {
 602                     virtio_ccw_reset_virtio(dev, vdev);
 603                 }
 604                 if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
 605                     virtio_ccw_start_ioeventfd(dev);
 606                 }
 607                 sch->curr_status.scsw.count = ccw.count - sizeof(status);
 608                 ret = 0;
 609             } else {
 610                 /* Trigger a command reject. */
 611                 ret = -ENOSYS;
 612             }
 613         }
 614         break;
 615     case CCW_CMD_SET_IND:
 616         if (check_len) {
 617             if (ccw.count != sizeof(indicators)) {
 618                 ret = -EINVAL;
 619                 break;
 620             }
 621         } else if (ccw.count < sizeof(indicators)) {
 622             /* Can't execute command. */
 623             ret = -EINVAL;
 624             break;
 625         }
 626         if (sch->thinint_active) {
 627             /* Trigger a command reject. */
 628             ret = -ENOSYS;
 629             break;
 630         }
 631         if (!ccw.cda) {
 632             ret = -EFAULT;
 633         } else {
 634             indicators = address_space_ldq_be(&address_space_memory, ccw.cda,
 635                                               MEMTXATTRS_UNSPECIFIED, NULL);
 636             dev->indicators = get_indicator(indicators, sizeof(uint64_t));
 637             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 638             ret = 0;
 639         }
 640         break;
 641     case CCW_CMD_SET_CONF_IND:
 642         if (check_len) {
 643             if (ccw.count != sizeof(indicators)) {
 644                 ret = -EINVAL;
 645                 break;
 646             }
 647         } else if (ccw.count < sizeof(indicators)) {
 648             /* Can't execute command. */
 649             ret = -EINVAL;
 650             break;
 651         }
 652         if (!ccw.cda) {
 653             ret = -EFAULT;
 654         } else {
 655             indicators = address_space_ldq_be(&address_space_memory, ccw.cda,
 656                                               MEMTXATTRS_UNSPECIFIED, NULL);
 657             dev->indicators2 = get_indicator(indicators, sizeof(uint64_t));
 658             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 659             ret = 0;
 660         }
 661         break;
 662     case CCW_CMD_READ_VQ_CONF:
 663         if (check_len) {
 664             if (ccw.count != sizeof(vq_config)) {
 665                 ret = -EINVAL;
 666                 break;
 667             }
 668         } else if (ccw.count < sizeof(vq_config)) {
 669             /* Can't execute command. */
 670             ret = -EINVAL;
 671             break;
 672         }
 673         if (!ccw.cda) {
 674             ret = -EFAULT;
 675         } else {
 676             vq_config.index = address_space_lduw_be(&address_space_memory,
 677                                                     ccw.cda,
 678                                                     MEMTXATTRS_UNSPECIFIED,
 679                                                     NULL);
 680             if (vq_config.index >= VIRTIO_CCW_QUEUE_MAX) {
 681                 ret = -EINVAL;
 682                 break;
 683             }
 684             vq_config.num_max = virtio_queue_get_num(vdev,
 685                                                      vq_config.index);
 686             address_space_stw_be(&address_space_memory,
 687                                  ccw.cda + sizeof(vq_config.index),
 688                                  vq_config.num_max,
 689                                  MEMTXATTRS_UNSPECIFIED,
 690                                  NULL);
 691             sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
 692             ret = 0;
 693         }
 694         break;
 695     case CCW_CMD_SET_IND_ADAPTER:
 696         if (check_len) {
 697             if (ccw.count != sizeof(*thinint)) {
 698                 ret = -EINVAL;
 699                 break;
 700             }
 701         } else if (ccw.count < sizeof(*thinint)) {
 702             /* Can't execute command. */
 703             ret = -EINVAL;
 704             break;
 705         }
 706         len = sizeof(*thinint);
 707         hw_len = len;
 708         if (!ccw.cda) {
 709             ret = -EFAULT;
 710         } else if (dev->indicators && !sch->thinint_active) {
 711             /* Trigger a command reject. */
 712             ret = -ENOSYS;
 713         } else {
 714             thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
 715             if (!thinint) {
 716                 ret = -EFAULT;
 717             } else {
 718                 uint64_t ind_bit = ldq_be_p(&thinint->ind_bit);
 719
 720                 len = hw_len;
 721                 dev->summary_indicator =
 722                     get_indicator(ldq_be_p(&thinint->summary_indicator),
 723                                   sizeof(uint8_t));
 724                 dev->indicators =
 725                     get_indicator(ldq_be_p(&thinint->device_indicator),
 726                                   ind_bit / 8 + 1);
 727                 dev->thinint_isc = thinint->isc;
 728                 dev->routes.adapter.ind_offset = ind_bit;
 729                 dev->routes.adapter.summary_offset = 7;
 730                 cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len);
 731                 ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO,
 732                                               dev->thinint_isc, true, false,
 733                                               &dev->routes.adapter.adapter_id);
 734                 assert(ret == 0);
 735                 sch->thinint_active = ((dev->indicators != NULL) &&
 736                                        (dev->summary_indicator != NULL));
 737                 sch->curr_status.scsw.count = ccw.count - len;
 738                 ret = 0;
 739             }
 740         }
 741         break;
 742     case CCW_CMD_SET_VIRTIO_REV:
 743         len = sizeof(revinfo);
 744         if (ccw.count < len) {
 745             ret = -EINVAL;
 746             break;
 747         }
 748         if (!ccw.cda) {
 749             ret = -EFAULT;
 750             break;
 751         }
 752         revinfo.revision =
 753             address_space_lduw_be(&address_space_memory, ccw.cda,
 754                                   MEMTXATTRS_UNSPECIFIED, NULL);
 755         revinfo.length =
 756             address_space_lduw_be(&address_space_memory,
 757                                   ccw.cda + sizeof(revinfo.revision),
 758                                   MEMTXATTRS_UNSPECIFIED, NULL);
 759         if (ccw.count < len + revinfo.length ||
 760             (check_len && ccw.count > len + revinfo.length)) {
 761             ret = -EINVAL;
 762             break;
 763         }
 764         /*
 765          * Once we start to support revisions with additional data, we'll
 766          * need to fetch it here. Nothing to do for now, though.
 767          */
 768         if (dev->revision >= 0 ||
 769             revinfo.revision > virtio_ccw_rev_max(vdev)) {
 770             ret = -ENOSYS;
 771             break;
 772         }
 773         ret = 0;
 774         dev->revision = revinfo.revision;
 775         break;
 776     default:
 777         ret = -ENOSYS;
 778         break;
 779     }
 780     return ret;
 781 }
 782
 783 static void virtio_sch_disable_cb(SubchDev *sch)
 784 {
 785     VirtioCcwDevice *dev = sch->driver_data;
 786
 787     dev->revision = -1;
 788 }
 789
 790 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
 791 {
 792     unsigned int cssid = 0;
 793     unsigned int ssid = 0;
 794     unsigned int schid;
 795     unsigned int devno;
 796     bool have_devno = false;
 797     bool found = false;
 798     SubchDev *sch;
 799     int num;
 800     Error *err = NULL;
 801     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 802
 803     sch = g_malloc0(sizeof(SubchDev));
 804
 805     sch->driver_data = dev;
 806     dev->sch = sch;
 807
 808     dev->indicators = NULL;
 809
 810     /* Initialize subchannel structure. */
 811     sch->channel_prog = 0x0;
 812     sch->last_cmd_valid = false;
 813     sch->thinint_active = false;
 814     /*
 815      * Use a device number if provided. Otherwise, fall back to subchannel
 816      * number.
 817      */
 818     if (dev->bus_id) {
 819         num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno);
 820         if (num == 3) {
 821             if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
 822                 error_setg(errp, "Invalid cssid or ssid: cssid %x, ssid %x",
 823                            cssid, ssid);
 824                 goto out_err;
 825             }
 826             /* Enforce use of virtual cssid. */
 827             if (cssid != VIRTUAL_CSSID) {
 828                 error_setg(errp, "cssid %x not valid for virtio devices",
 829                            cssid);
 830                 goto out_err;
 831             }
 832             if (css_devno_used(cssid, ssid, devno)) {
 833                 error_setg(errp, "Device %x.%x.%04x already exists",
 834                            cssid, ssid, devno);
 835                 goto out_err;
 836             }
 837             sch->cssid = cssid;
 838             sch->ssid = ssid;
 839             sch->devno = devno;
 840             have_devno = true;
 841         } else {
 842             error_setg(errp, "Malformed devno parameter '%s'", dev->bus_id);
 843             goto out_err;
 844         }
 845     }
 846
 847     /* Find the next free id. */
 848     if (have_devno) {
 849         for (schid = 0; schid <= MAX_SCHID; schid++) {
 850             if (!css_find_subch(1, cssid, ssid, schid)) {
 851                 sch->schid = schid;
 852                 css_subch_assign(cssid, ssid, schid, devno, sch);
 853                 found = true;
 854                 break;
 855             }
 856         }
 857         if (!found) {
 858             error_setg(errp, "No free subchannel found for %x.%x.%04x",
 859                        cssid, ssid, devno);
 860             goto out_err;
 861         }
 862         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 863                                     "user-configured");
 864     } else {
 865         cssid = VIRTUAL_CSSID;
 866         for (ssid = 0; ssid <= MAX_SSID; ssid++) {
 867             for (schid = 0; schid <= MAX_SCHID; schid++) {
 868                 if (!css_find_subch(1, cssid, ssid, schid)) {
 869                     sch->cssid = cssid;
 870                     sch->ssid = ssid;
 871                     sch->schid = schid;
 872                     devno = schid;
 873                     /*
 874                      * If the devno is already taken, look further in this
 875                      * subchannel set.
 876                      */
 877                     while (css_devno_used(cssid, ssid, devno)) {
 878                         if (devno == MAX_SCHID) {
 879                             devno = 0;
 880                         } else if (devno == schid - 1) {
 881                             error_setg(errp, "No free devno found");
 882                             goto out_err;
 883                         } else {
 884                             devno++;
 885                         }
 886                     }
 887                     sch->devno = devno;
 888                     css_subch_assign(cssid, ssid, schid, devno, sch);
 889                     found = true;
 890                     break;
 891                 }
 892             }
 893             if (found) {
 894                 break;
 895             }
 896         }
 897         if (!found) {
 898             error_setg(errp, "Virtual channel subsystem is full!");
 899             goto out_err;
 900         }
 901         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 902                                     "auto-configured");
 903     }
 904
 905     /* Build initial schib. */
 906     css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
 907
 908     sch->ccw_cb = virtio_ccw_cb;
 909     sch->disable_cb = virtio_sch_disable_cb;
 910
 911     /* Build senseid data. */
 912     memset(&sch->id, 0, sizeof(SenseId));
 913     sch->id.reserved = 0xff;
 914     sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
 915
 916     dev->revision = -1;
 917
 918     if (k->realize) {
 919         k->realize(dev, &err);
 920     }
 921     if (err) {
 922         error_propagate(errp, err);
 923         css_subch_assign(cssid, ssid, schid, devno, NULL);
 924         goto out_err;
 925     }
 926
 927     return;
 928
 929 out_err:
 930     dev->sch = NULL;
 931     g_free(sch);
 932 }
 933
 934 static int virtio_ccw_exit(VirtioCcwDevice *dev)
 935 {
 936     SubchDev *sch = dev->sch;
 937
 938     if (sch) {
 939         css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 940         g_free(sch);
 941     }
 942     if (dev->indicators) {
 943         release_indicator(&dev->routes.adapter, dev->indicators);
 944         dev->indicators = NULL;
 945     }
 946     return 0;
 947 }
 948
 949 static void virtio_ccw_net_realize(VirtioCcwDevice *ccw_dev, Error **errp)
 950 {
 951     DeviceState *qdev = DEVICE(ccw_dev);
 952     VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev);
 953     DeviceState *vdev = DEVICE(&dev->vdev);
 954     Error *err = NULL;
 955
 956     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
 957                                   object_get_typename(OBJECT(qdev)));
 958     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 959     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
 960     if (err) {
 961         error_propagate(errp, err);
 962     }
 963 }
 964
 965 static void virtio_ccw_net_instance_init(Object *obj)
 966 {
 967     VirtIONetCcw *dev = VIRTIO_NET_CCW(obj);
 968
 969     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 970                                 TYPE_VIRTIO_NET);
 971     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
 972                               "bootindex", &error_abort);
 973 }
 974
 975 static void virtio_ccw_blk_realize(VirtioCcwDevice *ccw_dev, Error **errp)
 976 {
 977     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev);
 978     DeviceState *vdev = DEVICE(&dev->vdev);
 979     Error *err = NULL;
 980
 981     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 982     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
 983     if (err) {
 984         error_propagate(errp, err);
 985     }
 986 }
 987
 988 static void virtio_ccw_blk_instance_init(Object *obj)
 989 {
 990     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj);
 991
 992     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 993                                 TYPE_VIRTIO_BLK);
 994     object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
 995                               &error_abort);
 996     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
 997                               "bootindex", &error_abort);
 998 }
 999
1000 static void virtio_ccw_serial_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1001 {
1002     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev);
1003     DeviceState *vdev = DEVICE(&dev->vdev);
1004     DeviceState *proxy = DEVICE(ccw_dev);
1005     Error *err = NULL;
1006     char *bus_name;
1007
1008     /*
1009      * For command line compatibility, this sets the virtio-serial-device bus
1010      * name as before.
1011      */
1012     if (proxy->id) {
1013         bus_name = g_strdup_printf("%s.0", proxy->id);
1014         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1015         g_free(bus_name);
1016     }
1017
1018     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1019     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1020     if (err) {
1021         error_propagate(errp, err);
1022     }
1023 }
1024
1025
1026 static void virtio_ccw_serial_instance_init(Object *obj)
1027 {
1028     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj);
1029
1030     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1031                                 TYPE_VIRTIO_SERIAL);
1032 }
1033
1034 static void virtio_ccw_balloon_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1035 {
1036     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev);
1037     DeviceState *vdev = DEVICE(&dev->vdev);
1038     Error *err = NULL;
1039
1040     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1041     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1042     if (err) {
1043         error_propagate(errp, err);
1044     }
1045 }
1046
1047 static void virtio_ccw_balloon_instance_init(Object *obj)
1048 {
1049     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj);
1050
1051     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1052                                 TYPE_VIRTIO_BALLOON);
1053     object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev),
1054                               "guest-stats", &error_abort);
1055     object_property_add_alias(obj, "guest-stats-polling-interval",
1056                               OBJECT(&dev->vdev),
1057                               "guest-stats-polling-interval", &error_abort);
1058 }
1059
1060 static void virtio_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1061 {
1062     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev);
1063     DeviceState *vdev = DEVICE(&dev->vdev);
1064     DeviceState *qdev = DEVICE(ccw_dev);
1065     Error *err = NULL;
1066     char *bus_name;
1067
1068     /*
1069      * For command line compatibility, this sets the virtio-scsi-device bus
1070      * name as before.
1071      */
1072     if (qdev->id) {
1073         bus_name = g_strdup_printf("%s.0", qdev->id);
1074         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1075         g_free(bus_name);
1076     }
1077
1078     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1079     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1080     if (err) {
1081         error_propagate(errp, err);
1082     }
1083 }
1084
1085 static void virtio_ccw_scsi_instance_init(Object *obj)
1086 {
1087     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj);
1088
1089     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1090                                 TYPE_VIRTIO_SCSI);
1091     object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread",
1092                               &error_abort);
1093 }
1094
1095 #ifdef CONFIG_VHOST_SCSI
1096 static void vhost_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1097 {
1098     VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
1099     DeviceState *vdev = DEVICE(&dev->vdev);
1100     Error *err = NULL;
1101
1102     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1103     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1104     if (err) {
1105         error_propagate(errp, err);
1106     }
1107 }
1108
1109 static void vhost_ccw_scsi_instance_init(Object *obj)
1110 {
1111     VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
1112
1113     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1114                                 TYPE_VHOST_SCSI);
1115 }
1116 #endif
1117
1118 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1119 {
1120     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
1121     DeviceState *vdev = DEVICE(&dev->vdev);
1122     Error *err = NULL;
1123
1124     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1125     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1126     if (err) {
1127         error_propagate(errp, err);
1128         return;
1129     }
1130
1131     object_property_set_link(OBJECT(dev),
1132                              OBJECT(dev->vdev.conf.rng), "rng",
1133                              NULL);
1134 }
1135
1136 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
1137  * be careful and test performance if you change this.
1138  */
1139 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
1140 {
1141     return container_of(d, VirtioCcwDevice, parent_obj);
1142 }
1143
1144 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc,
1145                                      uint8_t to_be_set)
1146 {
1147     uint8_t ind_old, ind_new;
1148     hwaddr len = 1;
1149     uint8_t *ind_addr;
1150
1151     ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
1152     if (!ind_addr) {
1153         error_report("%s(%x.%x.%04x): unable to access indicator",
1154                      __func__, sch->cssid, sch->ssid, sch->schid);
1155         return -1;
1156     }
1157     do {
1158         ind_old = *ind_addr;
1159         ind_new = ind_old | to_be_set;
1160     } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
1161     cpu_physical_memory_unmap(ind_addr, len, 1, len);
1162
1163     return ind_old;
1164 }
1165
1166 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
1167 {
1168     VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
1169     SubchDev *sch = dev->sch;
1170     uint64_t indicators;
1171
1172     if (vector >= 128) {
1173         return;
1174     }
1175
1176     if (vector < VIRTIO_CCW_QUEUE_MAX) {
1177         if (!dev->indicators) {
1178             return;
1179         }
1180         if (sch->thinint_active) {
1181             /*
1182              * In the adapter interrupt case, indicators points to a
1183              * memory area that may be (way) larger than 64 bit and
1184              * ind_bit indicates the start of the indicators in a big
1185              * endian notation.
1186              */
1187             uint64_t ind_bit = dev->routes.adapter.ind_offset;
1188
1189             virtio_set_ind_atomic(sch, dev->indicators->addr +
1190                                   (ind_bit + vector) / 8,
1191                                   0x80 >> ((ind_bit + vector) % 8));
1192             if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr,
1193                                        0x01)) {
1194                 css_adapter_interrupt(dev->thinint_isc);
1195             }
1196         } else {
1197             indicators = address_space_ldq(&address_space_memory,
1198                                            dev->indicators->addr,
1199                                            MEMTXATTRS_UNSPECIFIED,
1200                                            NULL);
1201             indicators |= 1ULL << vector;
1202             address_space_stq(&address_space_memory, dev->indicators->addr,
1203                               indicators, MEMTXATTRS_UNSPECIFIED, NULL);
1204             css_conditional_io_interrupt(sch);
1205         }
1206     } else {
1207         if (!dev->indicators2) {
1208             return;
1209         }
1210         vector = 0;
1211         indicators = address_space_ldq(&address_space_memory,
1212                                        dev->indicators2->addr,
1213                                        MEMTXATTRS_UNSPECIFIED,
1214                                        NULL);
1215         indicators |= 1ULL << vector;
1216         address_space_stq(&address_space_memory, dev->indicators2->addr,
1217                           indicators, MEMTXATTRS_UNSPECIFIED, NULL);
1218         css_conditional_io_interrupt(sch);
1219     }
1220 }
1221
1222 static void virtio_ccw_reset(DeviceState *d)
1223 {
1224     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1225     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1226
1227     virtio_ccw_reset_virtio(dev, vdev);
1228     css_reset_sch(dev->sch);
1229 }
1230
1231 static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
1232 {
1233     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1234
1235     if (running) {
1236         virtio_ccw_start_ioeventfd(dev);
1237     } else {
1238         virtio_ccw_stop_ioeventfd(dev);
1239     }
1240 }
1241
1242 static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
1243 {
1244     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1245
1246     return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
1247 }
1248
1249 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
1250 {
1251     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1252
1253     /* Stop using the generic ioeventfd, we are doing eventfd handling
1254      * ourselves below */
1255     dev->ioeventfd_disabled = assign;
1256     if (assign) {
1257         virtio_ccw_stop_ioeventfd(dev);
1258     }
1259     return virtio_ccw_set_guest2host_notifier(dev, n, assign, false);
1260 }
1261
1262 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev)
1263 {
1264     int r;
1265
1266     if (!dev->sch->thinint_active) {
1267         return -EINVAL;
1268     }
1269
1270     r = map_indicator(&dev->routes.adapter, dev->summary_indicator);
1271     if (r) {
1272         return r;
1273     }
1274     r = map_indicator(&dev->routes.adapter, dev->indicators);
1275     if (r) {
1276         return r;
1277     }
1278     dev->routes.adapter.summary_addr = dev->summary_indicator->map;
1279     dev->routes.adapter.ind_addr = dev->indicators->map;
1280
1281     return 0;
1282 }
1283
1284 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs)
1285 {
1286     int i;
1287     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1288     int ret;
1289     S390FLICState *fs = s390_get_flic();
1290     S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
1291
1292     ret = virtio_ccw_get_mappings(dev);
1293     if (ret) {
1294         return ret;
1295     }
1296     for (i = 0; i < nvqs; i++) {
1297         if (!virtio_queue_get_num(vdev, i)) {
1298             break;
1299         }
1300     }
1301     dev->routes.num_routes = i;
1302     return fsc->add_adapter_routes(fs, &dev->routes);
1303 }
1304
1305 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs)
1306 {
1307     S390FLICState *fs = s390_get_flic();
1308     S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
1309
1310     fsc->release_adapter_routes(fs, &dev->routes);
1311 }
1312
1313 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n)
1314 {
1315     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1316     VirtQueue *vq = virtio_get_queue(vdev, n);
1317     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1318
1319     return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL,
1320                                               dev->routes.gsi[n]);
1321 }
1322
1323 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n)
1324 {
1325     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1326     VirtQueue *vq = virtio_get_queue(vdev, n);
1327     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1328     int ret;
1329
1330     ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier,
1331                                                 dev->routes.gsi[n]);
1332     assert(ret == 0);
1333 }
1334
1335 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
1336                                          bool assign, bool with_irqfd)
1337 {
1338     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1339     VirtQueue *vq = virtio_get_queue(vdev, n);
1340     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1341     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
1342
1343     if (assign) {
1344         int r = event_notifier_init(notifier, 0);
1345
1346         if (r < 0) {
1347             return r;
1348         }
1349         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
1350         if (with_irqfd) {
1351             r = virtio_ccw_add_irqfd(dev, n);
1352             if (r) {
1353                 virtio_queue_set_guest_notifier_fd_handler(vq, false,
1354                                                            with_irqfd);
1355                 return r;
1356             }
1357         }
1358         /*
1359          * We do not support individual masking for channel devices, so we
1360          * need to manually trigger any guest masking callbacks here.
1361          */
1362         if (k->guest_notifier_mask) {
1363             k->guest_notifier_mask(vdev, n, false);
1364         }
1365         /* get lost events and re-inject */
1366         if (k->guest_notifier_pending &&
1367             k->guest_notifier_pending(vdev, n)) {
1368             event_notifier_set(notifier);
1369         }
1370     } else {
1371         if (k->guest_notifier_mask) {
1372             k->guest_notifier_mask(vdev, n, true);
1373         }
1374         if (with_irqfd) {
1375             virtio_ccw_remove_irqfd(dev, n);
1376         }
1377         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
1378         event_notifier_cleanup(notifier);
1379     }
1380     return 0;
1381 }
1382
1383 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
1384                                           bool assigned)
1385 {
1386     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1387     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1388     bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled();
1389     int r, n;
1390
1391     if (with_irqfd && assigned) {
1392         /* irq routes need to be set up before assigning irqfds */
1393         r = virtio_ccw_setup_irqroutes(dev, nvqs);
1394         if (r < 0) {
1395             goto irqroute_error;
1396         }
1397     }
1398     for (n = 0; n < nvqs; n++) {
1399         if (!virtio_queue_get_num(vdev, n)) {
1400             break;
1401         }
1402         r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd);
1403         if (r < 0) {
1404             goto assign_error;
1405         }
1406     }
1407     if (with_irqfd && !assigned) {
1408         /* release irq routes after irqfds have been released */
1409         virtio_ccw_release_irqroutes(dev, nvqs);
1410     }
1411     return 0;
1412
1413 assign_error:
1414     while (--n >= 0) {
1415         virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
1416     }
1417 irqroute_error:
1418     if (with_irqfd && assigned) {
1419         virtio_ccw_release_irqroutes(dev, nvqs);
1420     }
1421     return r;
1422 }
1423
1424 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f)
1425 {
1426     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1427     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1428
1429     qemu_put_be16(f, virtio_queue_vector(vdev, n));
1430 }
1431
1432 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f)
1433 {
1434     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1435     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1436     uint16_t vector;
1437
1438     qemu_get_be16s(f, &vector);
1439     virtio_queue_set_vector(vdev, n , vector);
1440
1441     return 0;
1442 }
1443
1444 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
1445 {
1446     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1447     SubchDev *s = dev->sch;
1448     VirtIODevice *vdev = virtio_ccw_get_vdev(s);
1449
1450     subch_device_save(s, f);
1451     if (dev->indicators != NULL) {
1452         qemu_put_be32(f, dev->indicators->len);
1453         qemu_put_be64(f, dev->indicators->addr);
1454     } else {
1455         qemu_put_be32(f, 0);
1456         qemu_put_be64(f, 0UL);
1457     }
1458     if (dev->indicators2 != NULL) {
1459         qemu_put_be32(f, dev->indicators2->len);
1460         qemu_put_be64(f, dev->indicators2->addr);
1461     } else {
1462         qemu_put_be32(f, 0);
1463         qemu_put_be64(f, 0UL);
1464     }
1465     if (dev->summary_indicator != NULL) {
1466         qemu_put_be32(f, dev->summary_indicator->len);
1467         qemu_put_be64(f, dev->summary_indicator->addr);
1468     } else {
1469         qemu_put_be32(f, 0);
1470         qemu_put_be64(f, 0UL);
1471     }
1472     qemu_put_be16(f, vdev->config_vector);
1473     qemu_put_be64(f, dev->routes.adapter.ind_offset);
1474     qemu_put_byte(f, dev->thinint_isc);
1475     qemu_put_be32(f, dev->revision);
1476 }
1477
1478 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
1479 {
1480     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1481     SubchDev *s = dev->sch;
1482     VirtIODevice *vdev = virtio_ccw_get_vdev(s);
1483     int len;
1484
1485     s->driver_data = dev;
1486     subch_device_load(s, f);
1487     len = qemu_get_be32(f);
1488     if (len != 0) {
1489         dev->indicators = get_indicator(qemu_get_be64(f), len);
1490     } else {
1491         qemu_get_be64(f);
1492         dev->indicators = NULL;
1493     }
1494     len = qemu_get_be32(f);
1495     if (len != 0) {
1496         dev->indicators2 = get_indicator(qemu_get_be64(f), len);
1497     } else {
1498         qemu_get_be64(f);
1499         dev->indicators2 = NULL;
1500     }
1501     len = qemu_get_be32(f);
1502     if (len != 0) {
1503         dev->summary_indicator = get_indicator(qemu_get_be64(f), len);
1504     } else {
1505         qemu_get_be64(f);
1506         dev->summary_indicator = NULL;
1507     }
1508     qemu_get_be16s(f, &vdev->config_vector);
1509     dev->routes.adapter.ind_offset = qemu_get_be64(f);
1510     dev->thinint_isc = qemu_get_byte(f);
1511     if (s->thinint_active) {
1512         return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO,
1513                                        dev->thinint_isc, true, false,
1514                                        &dev->routes.adapter.adapter_id);
1515     }
1516     dev->revision = qemu_get_be32(f);
1517
1518     return 0;
1519 }
1520
1521 /* This is called by virtio-bus just after the device is plugged. */
1522 static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
1523 {
1524     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1525     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1526     SubchDev *sch = dev->sch;
1527     int n = virtio_get_num_queues(vdev);
1528
1529     if (virtio_get_num_queues(vdev) > VIRTIO_CCW_QUEUE_MAX) {
1530         error_setg(errp, "The nubmer of virtqueues %d "
1531                    "exceeds ccw limit %d", n,
1532                    VIRTIO_CCW_QUEUE_MAX);
1533         return;
1534     }
1535
1536     if (!kvm_eventfds_enabled()) {
1537         dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
1538     }
1539
1540     sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);
1541
1542     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
1543                           d->hotplugged, 1);
1544 }
1545
1546 static void virtio_ccw_device_unplugged(DeviceState *d)
1547 {
1548     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1549
1550     virtio_ccw_stop_ioeventfd(dev);
1551 }
1552 /**************** Virtio-ccw Bus Device Descriptions *******************/
1553
1554 static Property virtio_ccw_net_properties[] = {
1555     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1556     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1557                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1558     DEFINE_PROP_END_OF_LIST(),
1559 };
1560
1561 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
1562 {
1563     DeviceClass *dc = DEVICE_CLASS(klass);
1564     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1565
1566     k->realize = virtio_ccw_net_realize;
1567     k->exit = virtio_ccw_exit;
1568     dc->reset = virtio_ccw_reset;
1569     dc->props = virtio_ccw_net_properties;
1570     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1571 }
1572
1573 static const TypeInfo virtio_ccw_net = {
1574     .name          = TYPE_VIRTIO_NET_CCW,
1575     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1576     .instance_size = sizeof(VirtIONetCcw),
1577     .instance_init = virtio_ccw_net_instance_init,
1578     .class_init    = virtio_ccw_net_class_init,
1579 };
1580
1581 static Property virtio_ccw_blk_properties[] = {
1582     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1583     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1584                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1585     DEFINE_PROP_END_OF_LIST(),
1586 };
1587
1588 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
1589 {
1590     DeviceClass *dc = DEVICE_CLASS(klass);
1591     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1592
1593     k->realize = virtio_ccw_blk_realize;
1594     k->exit = virtio_ccw_exit;
1595     dc->reset = virtio_ccw_reset;
1596     dc->props = virtio_ccw_blk_properties;
1597     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1598 }
1599
1600 static const TypeInfo virtio_ccw_blk = {
1601     .name          = TYPE_VIRTIO_BLK_CCW,
1602     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1603     .instance_size = sizeof(VirtIOBlkCcw),
1604     .instance_init = virtio_ccw_blk_instance_init,
1605     .class_init    = virtio_ccw_blk_class_init,
1606 };
1607
1608 static Property virtio_ccw_serial_properties[] = {
1609     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1610     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1611                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1612     DEFINE_PROP_END_OF_LIST(),
1613 };
1614
1615 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
1616 {
1617     DeviceClass *dc = DEVICE_CLASS(klass);
1618     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1619
1620     k->realize = virtio_ccw_serial_realize;
1621     k->exit = virtio_ccw_exit;
1622     dc->reset = virtio_ccw_reset;
1623     dc->props = virtio_ccw_serial_properties;
1624     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
1625 }
1626
1627 static const TypeInfo virtio_ccw_serial = {
1628     .name          = TYPE_VIRTIO_SERIAL_CCW,
1629     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1630     .instance_size = sizeof(VirtioSerialCcw),
1631     .instance_init = virtio_ccw_serial_instance_init,
1632     .class_init    = virtio_ccw_serial_class_init,
1633 };
1634
1635 static Property virtio_ccw_balloon_properties[] = {
1636     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1637     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1638                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1639     DEFINE_PROP_END_OF_LIST(),
1640 };
1641
1642 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
1643 {
1644     DeviceClass *dc = DEVICE_CLASS(klass);
1645     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1646
1647     k->realize = virtio_ccw_balloon_realize;
1648     k->exit = virtio_ccw_exit;
1649     dc->reset = virtio_ccw_reset;
1650     dc->props = virtio_ccw_balloon_properties;
1651     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1652 }
1653
1654 static const TypeInfo virtio_ccw_balloon = {
1655     .name          = TYPE_VIRTIO_BALLOON_CCW,
1656     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1657     .instance_size = sizeof(VirtIOBalloonCcw),
1658     .instance_init = virtio_ccw_balloon_instance_init,
1659     .class_init    = virtio_ccw_balloon_class_init,
1660 };
1661
1662 static Property virtio_ccw_scsi_properties[] = {
1663     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1664     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1665                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1666     DEFINE_PROP_END_OF_LIST(),
1667 };
1668
1669 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
1670 {
1671     DeviceClass *dc = DEVICE_CLASS(klass);
1672     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1673
1674     k->realize = virtio_ccw_scsi_realize;
1675     k->exit = virtio_ccw_exit;
1676     dc->reset = virtio_ccw_reset;
1677     dc->props = virtio_ccw_scsi_properties;
1678     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1679 }
1680
1681 static const TypeInfo virtio_ccw_scsi = {
1682     .name          = TYPE_VIRTIO_SCSI_CCW,
1683     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1684     .instance_size = sizeof(VirtIOSCSICcw),
1685     .instance_init = virtio_ccw_scsi_instance_init,
1686     .class_init    = virtio_ccw_scsi_class_init,
1687 };
1688
1689 #ifdef CONFIG_VHOST_SCSI
1690 static Property vhost_ccw_scsi_properties[] = {
1691     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1692     DEFINE_PROP_END_OF_LIST(),
1693 };
1694
1695 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
1696 {
1697     DeviceClass *dc = DEVICE_CLASS(klass);
1698     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1699
1700     k->realize = vhost_ccw_scsi_realize;
1701     k->exit = virtio_ccw_exit;
1702     dc->reset = virtio_ccw_reset;
1703     dc->props = vhost_ccw_scsi_properties;
1704     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1705 }
1706
1707 static const TypeInfo vhost_ccw_scsi = {
1708     .name          = TYPE_VHOST_SCSI_CCW,
1709     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1710     .instance_size = sizeof(VHostSCSICcw),
1711     .instance_init = vhost_ccw_scsi_instance_init,
1712     .class_init    = vhost_ccw_scsi_class_init,
1713 };
1714 #endif
1715
1716 static void virtio_ccw_rng_instance_init(Object *obj)
1717 {
1718     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
1719
1720     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1721                                 TYPE_VIRTIO_RNG);
1722     object_property_add_alias(obj, "rng", OBJECT(&dev->vdev),
1723                               "rng", &error_abort);
1724 }
1725
1726 static Property virtio_ccw_rng_properties[] = {
1727     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1728     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1729                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1730     DEFINE_PROP_END_OF_LIST(),
1731 };
1732
1733 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
1734 {
1735     DeviceClass *dc = DEVICE_CLASS(klass);
1736     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1737
1738     k->realize = virtio_ccw_rng_realize;
1739     k->exit = virtio_ccw_exit;
1740     dc->reset = virtio_ccw_reset;
1741     dc->props = virtio_ccw_rng_properties;
1742     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1743 }
1744
1745 static const TypeInfo virtio_ccw_rng = {
1746     .name          = TYPE_VIRTIO_RNG_CCW,
1747     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1748     .instance_size = sizeof(VirtIORNGCcw),
1749     .instance_init = virtio_ccw_rng_instance_init,
1750     .class_init    = virtio_ccw_rng_class_init,
1751 };
1752
1753 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp)
1754 {
1755     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1756
1757     virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1758     virtio_ccw_device_realize(_dev, errp);
1759 }
1760
1761 static int virtio_ccw_busdev_exit(DeviceState *dev)
1762 {
1763     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1764     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1765
1766     return _info->exit(_dev);
1767 }
1768
1769 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev,
1770                                      DeviceState *dev, Error **errp)
1771 {
1772     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1773     SubchDev *sch = _dev->sch;
1774
1775     virtio_ccw_stop_ioeventfd(_dev);
1776
1777     /*
1778      * We should arrive here only for device_del, since we don't support
1779      * direct hot(un)plug of channels, but only through virtio.
1780      */
1781     assert(sch != NULL);
1782     /* Subchannel is now disabled and no longer valid. */
1783     sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
1784                                      PMCW_FLAGS_MASK_DNV);
1785
1786     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
1787
1788     object_unparent(OBJECT(dev));
1789 }
1790
1791 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1792 {
1793     DeviceClass *dc = DEVICE_CLASS(klass);
1794
1795     dc->realize = virtio_ccw_busdev_realize;
1796     dc->exit = virtio_ccw_busdev_exit;
1797     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1798 }
1799
1800 static const TypeInfo virtio_ccw_device_info = {
1801     .name = TYPE_VIRTIO_CCW_DEVICE,
1802     .parent = TYPE_DEVICE,
1803     .instance_size = sizeof(VirtioCcwDevice),
1804     .class_init = virtio_ccw_device_class_init,
1805     .class_size = sizeof(VirtIOCCWDeviceClass),
1806     .abstract = true,
1807 };
1808
1809 /***************** Virtual-css Bus Bridge Device ********************/
1810 /* Only required to have the virtio bus as child in the system bus */
1811
1812 static int virtual_css_bridge_init(SysBusDevice *dev)
1813 {
1814     /* nothing */
1815     return 0;
1816 }
1817
1818 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
1819 {
1820     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1821     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
1822     DeviceClass *dc = DEVICE_CLASS(klass);
1823
1824     k->init = virtual_css_bridge_init;
1825     hc->unplug = virtio_ccw_busdev_unplug;
1826     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
1827 }
1828
1829 static const TypeInfo virtual_css_bridge_info = {
1830     .name          = "virtual-css-bridge",
1831     .parent        = TYPE_SYS_BUS_DEVICE,
1832     .instance_size = sizeof(SysBusDevice),
1833     .class_init    = virtual_css_bridge_class_init,
1834     .interfaces = (InterfaceInfo[]) {
1835         { TYPE_HOTPLUG_HANDLER },
1836         { }
1837     }
1838 };
1839
1840 /* virtio-ccw-bus */
1841
1842 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1843                                VirtioCcwDevice *dev)
1844 {
1845     DeviceState *qdev = DEVICE(dev);
1846     char virtio_bus_name[] = "virtio-bus";
1847
1848     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1849                         qdev, virtio_bus_name);
1850 }
1851
1852 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1853 {
1854     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1855     BusClass *bus_class = BUS_CLASS(klass);
1856
1857     bus_class->max_dev = 1;
1858     k->notify = virtio_ccw_notify;
1859     k->vmstate_change = virtio_ccw_vmstate_change;
1860     k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1861     k->set_host_notifier = virtio_ccw_set_host_notifier;
1862     k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1863     k->save_queue = virtio_ccw_save_queue;
1864     k->load_queue = virtio_ccw_load_queue;
1865     k->save_config = virtio_ccw_save_config;
1866     k->load_config = virtio_ccw_load_config;
1867     k->device_plugged = virtio_ccw_device_plugged;
1868     k->device_unplugged = virtio_ccw_device_unplugged;
1869 }
1870
1871 static const TypeInfo virtio_ccw_bus_info = {
1872     .name = TYPE_VIRTIO_CCW_BUS,
1873     .parent = TYPE_VIRTIO_BUS,
1874     .instance_size = sizeof(VirtioCcwBusState),
1875     .class_init = virtio_ccw_bus_class_init,
1876 };
1877
1878 #ifdef CONFIG_VIRTFS
1879 static Property virtio_ccw_9p_properties[] = {
1880     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1881     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1882             VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1883     DEFINE_PROP_END_OF_LIST(),
1884 };
1885
1886 static void virtio_ccw_9p_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1887 {
1888     V9fsCCWState *dev = VIRTIO_9P_CCW(ccw_dev);
1889     DeviceState *vdev = DEVICE(&dev->vdev);
1890     Error *err = NULL;
1891
1892     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1893     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1894     if (err) {
1895         error_propagate(errp, err);
1896     }
1897 }
1898
1899 static void virtio_ccw_9p_class_init(ObjectClass *klass, void *data)
1900 {
1901     DeviceClass *dc = DEVICE_CLASS(klass);
1902     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1903
1904     k->exit = virtio_ccw_exit;
1905     k->realize = virtio_ccw_9p_realize;
1906     dc->reset = virtio_ccw_reset;
1907     dc->props = virtio_ccw_9p_properties;
1908     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1909 }
1910
1911 static void virtio_ccw_9p_instance_init(Object *obj)
1912 {
1913     V9fsCCWState *dev = VIRTIO_9P_CCW(obj);
1914
1915     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1916                                 TYPE_VIRTIO_9P);
1917 }
1918
1919 static const TypeInfo virtio_ccw_9p_info = {
1920     .name          = TYPE_VIRTIO_9P_CCW,
1921     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1922     .instance_size = sizeof(V9fsCCWState),
1923     .instance_init = virtio_ccw_9p_instance_init,
1924     .class_init    = virtio_ccw_9p_class_init,
1925 };
1926 #endif
1927
1928 static void virtio_ccw_register(void)
1929 {
1930     type_register_static(&virtio_ccw_bus_info);
1931     type_register_static(&virtual_css_bus_info);
1932     type_register_static(&virtio_ccw_device_info);
1933     type_register_static(&virtio_ccw_serial);
1934     type_register_static(&virtio_ccw_blk);
1935     type_register_static(&virtio_ccw_net);
1936     type_register_static(&virtio_ccw_balloon);
1937     type_register_static(&virtio_ccw_scsi);
1938 #ifdef CONFIG_VHOST_SCSI
1939     type_register_static(&vhost_ccw_scsi);
1940 #endif
1941     type_register_static(&virtio_ccw_rng);
1942     type_register_static(&virtual_css_bridge_info);
1943 #ifdef CONFIG_VIRTFS
1944     type_register_static(&virtio_ccw_9p_info);
1945 #endif
1946 }
1947
1948 type_init(virtio_ccw_register)