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