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 "qemu/osdep.h"
  14 #include "qapi/error.h"
  15 #include "hw/hw.h"
  16 #include "sysemu/block-backend.h"
  17 #include "sysemu/blockdev.h"
  18 #include "sysemu/sysemu.h"
  19 #include "sysemu/kvm.h"
  20 #include "net/net.h"
  21 #include "hw/virtio/virtio.h"
  22 #include "hw/virtio/virtio-serial.h"
  23 #include "hw/virtio/virtio-net.h"
  24 #include "hw/sysbus.h"
  25 #include "qemu/bitops.h"
  26 #include "qemu/error-report.h"
  27 #include "hw/virtio/virtio-access.h"
  28 #include "hw/virtio/virtio-bus.h"
  29 #include "hw/s390x/adapter.h"
  30 #include "hw/s390x/s390_flic.h"
  31
  32 #include "hw/s390x/ioinst.h"
  33 #include "hw/s390x/css.h"
  34 #include "virtio-ccw.h"
  35 #include "trace.h"
  36
  37 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
  38                                VirtioCcwDevice *dev);
  39
  40 static void virtual_css_bus_reset(BusState *qbus)
  41 {
  42     /* This should actually be modelled via the generic css */
  43     css_reset();
  44 }
  45
  46
  47 static void virtual_css_bus_class_init(ObjectClass *klass, void *data)
  48 {
  49     BusClass *k = BUS_CLASS(klass);
  50
  51     k->reset = virtual_css_bus_reset;
  52 }
  53
  54 static const TypeInfo virtual_css_bus_info = {
  55     .name = TYPE_VIRTUAL_CSS_BUS,
  56     .parent = TYPE_BUS,
  57     .instance_size = sizeof(VirtualCssBus),
  58     .class_init = virtual_css_bus_class_init,
  59 };
  60
  61 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
  62 {
  63     VirtIODevice *vdev = NULL;
  64     VirtioCcwDevice *dev = sch->driver_data;
  65
  66     if (dev) {
  67         vdev = virtio_bus_get_device(&dev->bus);
  68     }
  69     return vdev;
  70 }
  71
  72 static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
  73                                               bool assign, bool set_handler)
  74 {
  75     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
  76     VirtQueue *vq = virtio_get_queue(vdev, n);
  77     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
  78     int r = 0;
  79     SubchDev *sch = dev->sch;
  80     uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
  81
  82     if (assign) {
  83         r = event_notifier_init(notifier, 1);
  84         if (r < 0) {
  85             error_report("%s: unable to init event notifier: %d", __func__, r);
  86             return r;
  87         }
  88         virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
  89         r = s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
  90         if (r < 0) {
  91             error_report("%s: unable to assign ioeventfd: %d", __func__, r);
  92             virtio_queue_set_host_notifier_fd_handler(vq, false, false);
  93             event_notifier_cleanup(notifier);
  94             return r;
  95         }
  96     } else {
  97         virtio_queue_set_host_notifier_fd_handler(vq, false, false);
  98         s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
  99         event_notifier_cleanup(notifier);
 100     }
 101     return r;
 102 }
 103
 104 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
 105 {
 106     VirtIODevice *vdev;
 107     int n, r;
 108
 109     if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) ||
 110         dev->ioeventfd_disabled ||
 111         dev->ioeventfd_started) {
 112         return;
 113     }
 114     vdev = virtio_bus_get_device(&dev->bus);
 115     for (n = 0; n < VIRTIO_CCW_QUEUE_MAX; n++) {
 116         if (!virtio_queue_get_num(vdev, n)) {
 117             continue;
 118         }
 119         r = virtio_ccw_set_guest2host_notifier(dev, n, true, true);
 120         if (r < 0) {
 121             goto assign_error;
 122         }
 123     }
 124     dev->ioeventfd_started = true;
 125     return;
 126
 127   assign_error:
 128     while (--n >= 0) {
 129         if (!virtio_queue_get_num(vdev, n)) {
 130             continue;
 131         }
 132         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 133         assert(r >= 0);
 134     }
 135     dev->ioeventfd_started = false;
 136     /* Disable ioeventfd for this device. */
 137     dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
 138     error_report("%s: failed. Fallback to userspace (slower).", __func__);
 139 }
 140
 141 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
 142 {
 143     VirtIODevice *vdev;
 144     int n, r;
 145
 146     if (!dev->ioeventfd_started) {
 147         return;
 148     }
 149     vdev = virtio_bus_get_device(&dev->bus);
 150     for (n = 0; n < VIRTIO_CCW_QUEUE_MAX; n++) {
 151         if (!virtio_queue_get_num(vdev, n)) {
 152             continue;
 153         }
 154         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 155         assert(r >= 0);
 156     }
 157     dev->ioeventfd_started = false;
 158 }
 159
 160 VirtualCssBus *virtual_css_bus_init(void)
 161 {
 162     VirtualCssBus *cbus;
 163     BusState *bus;
 164     DeviceState *dev;
 165
 166     /* Create bridge device */
 167     dev = qdev_create(NULL, "virtual-css-bridge");
 168     qdev_init_nofail(dev);
 169
 170     /* Create bus on bridge device */
 171     bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
 172     cbus = VIRTUAL_CSS_BUS(bus);
 173
 174     /* Enable hotplugging */
 175     qbus_set_hotplug_handler(bus, dev, &error_abort);
 176
 177     return cbus;
 178 }
 179
 180 /* Communication blocks used by several channel commands. */
 181 typedef struct VqInfoBlockLegacy {
 182     uint64_t queue;
 183     uint32_t align;
 184     uint16_t index;
 185     uint16_t num;
 186 } QEMU_PACKED VqInfoBlockLegacy;
 187
 188 typedef struct VqInfoBlock {
 189     uint64_t desc;
 190     uint32_t res0;
 191     uint16_t index;
 192     uint16_t num;
 193     uint64_t avail;
 194     uint64_t used;
 195 } QEMU_PACKED VqInfoBlock;
 196
 197 typedef struct VqConfigBlock {
 198     uint16_t index;
 199     uint16_t num_max;
 200 } QEMU_PACKED VqConfigBlock;
 201
 202 typedef struct VirtioFeatDesc {
 203     uint32_t features;
 204     uint8_t index;
 205 } QEMU_PACKED VirtioFeatDesc;
 206
 207 typedef struct VirtioThinintInfo {
 208     hwaddr summary_indicator;
 209     hwaddr device_indicator;
 210     uint64_t ind_bit;
 211     uint8_t isc;
 212 } QEMU_PACKED VirtioThinintInfo;
 213
 214 typedef struct VirtioRevInfo {
 215     uint16_t revision;
 216     uint16_t length;
 217     uint8_t data[0];
 218 } QEMU_PACKED VirtioRevInfo;
 219
 220 /* Specify where the virtqueues for the subchannel are in guest memory. */
 221 static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info,
 222                               VqInfoBlockLegacy *linfo)
 223 {
 224     VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
 225     uint16_t index = info ? info->index : linfo->index;
 226     uint16_t num = info ? info->num : linfo->num;
 227     uint64_t desc = info ? info->desc : linfo->queue;
 228
 229     if (index >= VIRTIO_CCW_QUEUE_MAX) {
 230         return -EINVAL;
 231     }
 232
 233     /* Current code in virtio.c relies on 4K alignment. */
 234     if (linfo && desc && (linfo->align != 4096)) {
 235         return -EINVAL;
 236     }
 237
 238     if (!vdev) {
 239         return -EINVAL;
 240     }
 241
 242     if (info) {
 243         virtio_queue_set_rings(vdev, index, desc, info->avail, info->used);
 244     } else {
 245         virtio_queue_set_addr(vdev, index, desc);
 246     }
 247     if (!desc) {
 248         virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR);
 249     } else {
 250         if (info) {
 251             /* virtio-1 allows changing the ring size. */
 252             if (virtio_queue_get_num(vdev, index) < num) {
 253                 /* Fail if we exceed the maximum number. */
 254                 return -EINVAL;
 255             }
 256             virtio_queue_set_num(vdev, index, num);
 257         } else if (virtio_queue_get_num(vdev, index) > num) {
 258             /* Fail if we don't have a big enough queue. */
 259             return -EINVAL;
 260         }
 261         /* We ignore possible increased num for legacy for compatibility. */
 262         virtio_queue_set_vector(vdev, index, index);
 263     }
 264     /* tell notify handler in case of config change */
 265     vdev->config_vector = VIRTIO_CCW_QUEUE_MAX;
 266     return 0;
 267 }
 268
 269 static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev)
 270 {
 271     virtio_ccw_stop_ioeventfd(dev);
 272     virtio_reset(vdev);
 273     if (dev->indicators) {
 274         release_indicator(&dev->routes.adapter, dev->indicators);
 275         dev->indicators = NULL;
 276     }
 277     if (dev->indicators2) {
 278         release_indicator(&dev->routes.adapter, dev->indicators2);
 279         dev->indicators2 = NULL;
 280     }
 281     if (dev->summary_indicator) {
 282         release_indicator(&dev->routes.adapter, dev->summary_indicator);
 283         dev->summary_indicator = NULL;
 284     }
 285     dev->sch->thinint_active = false;
 286 }
 287
 288 static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len,
 289                                     bool is_legacy)
 290 {
 291     int ret;
 292     VqInfoBlock info;
 293     VqInfoBlockLegacy linfo;
 294     size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info);
 295
 296     if (check_len) {
 297         if (ccw.count != info_len) {
 298             return -EINVAL;
 299         }
 300     } else if (ccw.count < info_len) {
 301         /* Can't execute command. */
 302         return -EINVAL;
 303     }
 304     if (!ccw.cda) {
 305         return -EFAULT;
 306     }
 307     if (is_legacy) {
 308         linfo.queue = address_space_ldq_be(&address_space_memory, ccw.cda,
 309                                            MEMTXATTRS_UNSPECIFIED, NULL);
 310         linfo.align = address_space_ldl_be(&address_space_memory,
 311                                            ccw.cda + sizeof(linfo.queue),
 312                                            MEMTXATTRS_UNSPECIFIED,
 313                                            NULL);
 314         linfo.index = address_space_lduw_be(&address_space_memory,
 315                                             ccw.cda + sizeof(linfo.queue)
 316                                             + sizeof(linfo.align),
 317                                             MEMTXATTRS_UNSPECIFIED,
 318                                             NULL);
 319         linfo.num = address_space_lduw_be(&address_space_memory,
 320                                           ccw.cda + sizeof(linfo.queue)
 321                                           + sizeof(linfo.align)
 322                                           + sizeof(linfo.index),
 323                                           MEMTXATTRS_UNSPECIFIED,
 324                                           NULL);
 325         ret = virtio_ccw_set_vqs(sch, NULL, &linfo);
 326     } else {
 327         info.desc = address_space_ldq_be(&address_space_memory, ccw.cda,
 328                                            MEMTXATTRS_UNSPECIFIED, NULL);
 329         info.index = address_space_lduw_be(&address_space_memory,
 330                                            ccw.cda + sizeof(info.desc)
 331                                            + sizeof(info.res0),
 332                                            MEMTXATTRS_UNSPECIFIED, NULL);
 333         info.num = address_space_lduw_be(&address_space_memory,
 334                                          ccw.cda + sizeof(info.desc)
 335                                          + sizeof(info.res0)
 336                                          + sizeof(info.index),
 337                                          MEMTXATTRS_UNSPECIFIED, NULL);
 338         info.avail = address_space_ldq_be(&address_space_memory,
 339                                           ccw.cda + sizeof(info.desc)
 340                                           + sizeof(info.res0)
 341                                           + sizeof(info.index)
 342                                           + sizeof(info.num),
 343                                           MEMTXATTRS_UNSPECIFIED, NULL);
 344         info.used = address_space_ldq_be(&address_space_memory,
 345                                          ccw.cda + sizeof(info.desc)
 346                                          + sizeof(info.res0)
 347                                          + sizeof(info.index)
 348                                          + sizeof(info.num)
 349                                          + sizeof(info.avail),
 350                                          MEMTXATTRS_UNSPECIFIED, NULL);
 351         ret = virtio_ccw_set_vqs(sch, &info, NULL);
 352     }
 353     sch->curr_status.scsw.count = 0;
 354     return ret;
 355 }
 356
 357 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
 358 {
 359     int ret;
 360     VirtioRevInfo revinfo;
 361     uint8_t status;
 362     VirtioFeatDesc features;
 363     void *config;
 364     hwaddr indicators;
 365     VqConfigBlock vq_config;
 366     VirtioCcwDevice *dev = sch->driver_data;
 367     VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
 368     bool check_len;
 369     int len;
 370     hwaddr hw_len;
 371     VirtioThinintInfo *thinint;
 372
 373     if (!dev) {
 374         return -EINVAL;
 375     }
 376
 377     trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
 378                                    ccw.cmd_code);
 379     check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
 380
 381     /* Look at the command. */
 382     switch (ccw.cmd_code) {
 383     case CCW_CMD_SET_VQ:
 384         ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1);
 385         break;
 386     case CCW_CMD_VDEV_RESET:
 387         virtio_ccw_reset_virtio(dev, vdev);
 388         ret = 0;
 389         break;
 390     case CCW_CMD_READ_FEAT:
 391         if (check_len) {
 392             if (ccw.count != sizeof(features)) {
 393                 ret = -EINVAL;
 394                 break;
 395             }
 396         } else if (ccw.count < sizeof(features)) {
 397             /* Can't execute command. */
 398             ret = -EINVAL;
 399             break;
 400         }
 401         if (!ccw.cda) {
 402             ret = -EFAULT;
 403         } else {
 404             features.index = address_space_ldub(&address_space_memory,
 405                                                 ccw.cda
 406                                                 + sizeof(features.features),
 407                                                 MEMTXATTRS_UNSPECIFIED,
 408                                                 NULL);
 409             if (features.index == 0) {
 410                 if (dev->revision >= 1) {
 411                     /* Don't offer legacy features for modern devices. */
 412                     features.features = (uint32_t)
 413                         (vdev->host_features & ~VIRTIO_LEGACY_FEATURES);
 414                 } else {
 415                     features.features = (uint32_t)vdev->host_features;
 416                 }
 417             } else if ((features.index == 1) && (dev->revision >= 1)) {
 418                 /*
 419                  * Only offer feature bits beyond 31 if the guest has
 420                  * negotiated at least revision 1.
 421                  */
 422                 features.features = (uint32_t)(vdev->host_features >> 32);
 423             } else {
 424                 /* Return zeroes if the guest supports more feature bits. */
 425                 features.features = 0;
 426             }
 427             address_space_stl_le(&address_space_memory, ccw.cda,
 428                                  features.features, MEMTXATTRS_UNSPECIFIED,
 429                                  NULL);
 430             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 431             ret = 0;
 432         }
 433         break;
 434     case CCW_CMD_WRITE_FEAT:
 435         if (check_len) {
 436             if (ccw.count != sizeof(features)) {
 437                 ret = -EINVAL;
 438                 break;
 439             }
 440         } else if (ccw.count < sizeof(features)) {
 441             /* Can't execute command. */
 442             ret = -EINVAL;
 443             break;
 444         }
 445         if (!ccw.cda) {
 446             ret = -EFAULT;
 447         } else {
 448             features.index = address_space_ldub(&address_space_memory,
 449                                                 ccw.cda
 450                                                 + sizeof(features.features),
 451                                                 MEMTXATTRS_UNSPECIFIED,
 452                                                 NULL);
 453             features.features = address_space_ldl_le(&address_space_memory,
 454                                                      ccw.cda,
 455                                                      MEMTXATTRS_UNSPECIFIED,
 456                                                      NULL);
 457             if (features.index == 0) {
 458                 virtio_set_features(vdev,
 459                                     (vdev->guest_features & 0xffffffff00000000ULL) |
 460                                     features.features);
 461             } else if ((features.index == 1) && (dev->revision >= 1)) {
 462                 /*
 463                  * If the guest did not negotiate at least revision 1,
 464                  * we did not offer it any feature bits beyond 31. Such a
 465                  * guest passing us any bit here is therefore buggy.
 466                  */
 467                 virtio_set_features(vdev,
 468                                     (vdev->guest_features & 0x00000000ffffffffULL) |
 469                                     ((uint64_t)features.features << 32));
 470             } else {
 471                 /*
 472                  * If the guest supports more feature bits, assert that it
 473                  * passes us zeroes for those we don't support.
 474                  */
 475                 if (features.features) {
 476                     fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n",
 477                             features.index, features.features);
 478                     /* XXX: do a unit check here? */
 479                 }
 480             }
 481             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 482             ret = 0;
 483         }
 484         break;
 485     case CCW_CMD_READ_CONF:
 486         if (check_len) {
 487             if (ccw.count > vdev->config_len) {
 488                 ret = -EINVAL;
 489                 break;
 490             }
 491         }
 492         len = MIN(ccw.count, vdev->config_len);
 493         if (!ccw.cda) {
 494             ret = -EFAULT;
 495         } else {
 496             virtio_bus_get_vdev_config(&dev->bus, vdev->config);
 497             /* XXX config space endianness */
 498             cpu_physical_memory_write(ccw.cda, vdev->config, len);
 499             sch->curr_status.scsw.count = ccw.count - len;
 500             ret = 0;
 501         }
 502         break;
 503     case CCW_CMD_WRITE_CONF:
 504         if (check_len) {
 505             if (ccw.count > vdev->config_len) {
 506                 ret = -EINVAL;
 507                 break;
 508             }
 509         }
 510         len = MIN(ccw.count, vdev->config_len);
 511         hw_len = len;
 512         if (!ccw.cda) {
 513             ret = -EFAULT;
 514         } else {
 515             config = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
 516             if (!config) {
 517                 ret = -EFAULT;
 518             } else {
 519                 len = hw_len;
 520                 /* XXX config space endianness */
 521                 memcpy(vdev->config, config, len);
 522                 cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
 523                 virtio_bus_set_vdev_config(&dev->bus, vdev->config);
 524                 sch->curr_status.scsw.count = ccw.count - len;
 525                 ret = 0;
 526             }
 527         }
 528         break;
 529     case CCW_CMD_WRITE_STATUS:
 530         if (check_len) {
 531             if (ccw.count != sizeof(status)) {
 532                 ret = -EINVAL;
 533                 break;
 534             }
 535         } else if (ccw.count < sizeof(status)) {
 536             /* Can't execute command. */
 537             ret = -EINVAL;
 538             break;
 539         }
 540         if (!ccw.cda) {
 541             ret = -EFAULT;
 542         } else {
 543             status = address_space_ldub(&address_space_memory, ccw.cda,
 544                                         MEMTXATTRS_UNSPECIFIED, NULL);
 545             if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
 546                 virtio_ccw_stop_ioeventfd(dev);
 547             }
 548             if (virtio_set_status(vdev, status) == 0) {
 549                 if (vdev->status == 0) {
 550                     virtio_ccw_reset_virtio(dev, vdev);
 551                 }
 552                 if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
 553                     virtio_ccw_start_ioeventfd(dev);
 554                 }
 555                 sch->curr_status.scsw.count = ccw.count - sizeof(status);
 556                 ret = 0;
 557             } else {
 558                 /* Trigger a command reject. */
 559                 ret = -ENOSYS;
 560             }
 561         }
 562         break;
 563     case CCW_CMD_SET_IND:
 564         if (check_len) {
 565             if (ccw.count != sizeof(indicators)) {
 566                 ret = -EINVAL;
 567                 break;
 568             }
 569         } else if (ccw.count < sizeof(indicators)) {
 570             /* Can't execute command. */
 571             ret = -EINVAL;
 572             break;
 573         }
 574         if (sch->thinint_active) {
 575             /* Trigger a command reject. */
 576             ret = -ENOSYS;
 577             break;
 578         }
 579         if (!ccw.cda) {
 580             ret = -EFAULT;
 581         } else {
 582             indicators = address_space_ldq_be(&address_space_memory, ccw.cda,
 583                                               MEMTXATTRS_UNSPECIFIED, NULL);
 584             dev->indicators = get_indicator(indicators, sizeof(uint64_t));
 585             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 586             ret = 0;
 587         }
 588         break;
 589     case CCW_CMD_SET_CONF_IND:
 590         if (check_len) {
 591             if (ccw.count != sizeof(indicators)) {
 592                 ret = -EINVAL;
 593                 break;
 594             }
 595         } else if (ccw.count < sizeof(indicators)) {
 596             /* Can't execute command. */
 597             ret = -EINVAL;
 598             break;
 599         }
 600         if (!ccw.cda) {
 601             ret = -EFAULT;
 602         } else {
 603             indicators = address_space_ldq_be(&address_space_memory, ccw.cda,
 604                                               MEMTXATTRS_UNSPECIFIED, NULL);
 605             dev->indicators2 = get_indicator(indicators, sizeof(uint64_t));
 606             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 607             ret = 0;
 608         }
 609         break;
 610     case CCW_CMD_READ_VQ_CONF:
 611         if (check_len) {
 612             if (ccw.count != sizeof(vq_config)) {
 613                 ret = -EINVAL;
 614                 break;
 615             }
 616         } else if (ccw.count < sizeof(vq_config)) {
 617             /* Can't execute command. */
 618             ret = -EINVAL;
 619             break;
 620         }
 621         if (!ccw.cda) {
 622             ret = -EFAULT;
 623         } else {
 624             vq_config.index = address_space_lduw_be(&address_space_memory,
 625                                                     ccw.cda,
 626                                                     MEMTXATTRS_UNSPECIFIED,
 627                                                     NULL);
 628             if (vq_config.index >= VIRTIO_CCW_QUEUE_MAX) {
 629                 ret = -EINVAL;
 630                 break;
 631             }
 632             vq_config.num_max = virtio_queue_get_num(vdev,
 633                                                      vq_config.index);
 634             address_space_stw_be(&address_space_memory,
 635                                  ccw.cda + sizeof(vq_config.index),
 636                                  vq_config.num_max,
 637                                  MEMTXATTRS_UNSPECIFIED,
 638                                  NULL);
 639             sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
 640             ret = 0;
 641         }
 642         break;
 643     case CCW_CMD_SET_IND_ADAPTER:
 644         if (check_len) {
 645             if (ccw.count != sizeof(*thinint)) {
 646                 ret = -EINVAL;
 647                 break;
 648             }
 649         } else if (ccw.count < sizeof(*thinint)) {
 650             /* Can't execute command. */
 651             ret = -EINVAL;
 652             break;
 653         }
 654         len = sizeof(*thinint);
 655         hw_len = len;
 656         if (!ccw.cda) {
 657             ret = -EFAULT;
 658         } else if (dev->indicators && !sch->thinint_active) {
 659             /* Trigger a command reject. */
 660             ret = -ENOSYS;
 661         } else {
 662             thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
 663             if (!thinint) {
 664                 ret = -EFAULT;
 665             } else {
 666                 uint64_t ind_bit = ldq_be_p(&thinint->ind_bit);
 667
 668                 len = hw_len;
 669                 dev->summary_indicator =
 670                     get_indicator(ldq_be_p(&thinint->summary_indicator),
 671                                   sizeof(uint8_t));
 672                 dev->indicators =
 673                     get_indicator(ldq_be_p(&thinint->device_indicator),
 674                                   ind_bit / 8 + 1);
 675                 dev->thinint_isc = thinint->isc;
 676                 dev->routes.adapter.ind_offset = ind_bit;
 677                 dev->routes.adapter.summary_offset = 7;
 678                 cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len);
 679                 ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO,
 680                                               dev->thinint_isc, true, false,
 681                                               &dev->routes.adapter.adapter_id);
 682                 assert(ret == 0);
 683                 sch->thinint_active = ((dev->indicators != NULL) &&
 684                                        (dev->summary_indicator != NULL));
 685                 sch->curr_status.scsw.count = ccw.count - len;
 686                 ret = 0;
 687             }
 688         }
 689         break;
 690     case CCW_CMD_SET_VIRTIO_REV:
 691         len = sizeof(revinfo);
 692         if (ccw.count < len) {
 693             ret = -EINVAL;
 694             break;
 695         }
 696         if (!ccw.cda) {
 697             ret = -EFAULT;
 698             break;
 699         }
 700         revinfo.revision =
 701             address_space_lduw_be(&address_space_memory, ccw.cda,
 702                                   MEMTXATTRS_UNSPECIFIED, NULL);
 703         revinfo.length =
 704             address_space_lduw_be(&address_space_memory,
 705                                   ccw.cda + sizeof(revinfo.revision),
 706                                   MEMTXATTRS_UNSPECIFIED, NULL);
 707         if (ccw.count < len + revinfo.length ||
 708             (check_len && ccw.count > len + revinfo.length)) {
 709             ret = -EINVAL;
 710             break;
 711         }
 712         /*
 713          * Once we start to support revisions with additional data, we'll
 714          * need to fetch it here. Nothing to do for now, though.
 715          */
 716         if (dev->revision >= 0 ||
 717             revinfo.revision > virtio_ccw_rev_max(dev)) {
 718             ret = -ENOSYS;
 719             break;
 720         }
 721         ret = 0;
 722         dev->revision = revinfo.revision;
 723         break;
 724     default:
 725         ret = -ENOSYS;
 726         break;
 727     }
 728     return ret;
 729 }
 730
 731 static void virtio_sch_disable_cb(SubchDev *sch)
 732 {
 733     VirtioCcwDevice *dev = sch->driver_data;
 734
 735     dev->revision = -1;
 736 }
 737
 738 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
 739 {
 740     unsigned int cssid = 0;
 741     unsigned int ssid = 0;
 742     unsigned int schid;
 743     unsigned int devno;
 744     bool have_devno = false;
 745     bool found = false;
 746     SubchDev *sch;
 747     int num;
 748     Error *err = NULL;
 749     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 750
 751     sch = g_malloc0(sizeof(SubchDev));
 752
 753     sch->driver_data = dev;
 754     dev->sch = sch;
 755
 756     dev->indicators = NULL;
 757
 758     /* Initialize subchannel structure. */
 759     sch->channel_prog = 0x0;
 760     sch->last_cmd_valid = false;
 761     sch->thinint_active = false;
 762     /*
 763      * Use a device number if provided. Otherwise, fall back to subchannel
 764      * number.
 765      */
 766     if (dev->bus_id) {
 767         num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno);
 768         if (num == 3) {
 769             if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
 770                 error_setg(errp, "Invalid cssid or ssid: cssid %x, ssid %x",
 771                            cssid, ssid);
 772                 goto out_err;
 773             }
 774             /* Enforce use of virtual cssid. */
 775             if (cssid != VIRTUAL_CSSID) {
 776                 error_setg(errp, "cssid %x not valid for virtio devices",
 777                            cssid);
 778                 goto out_err;
 779             }
 780             if (css_devno_used(cssid, ssid, devno)) {
 781                 error_setg(errp, "Device %x.%x.%04x already exists",
 782                            cssid, ssid, devno);
 783                 goto out_err;
 784             }
 785             sch->cssid = cssid;
 786             sch->ssid = ssid;
 787             sch->devno = devno;
 788             have_devno = true;
 789         } else {
 790             error_setg(errp, "Malformed devno parameter '%s'", dev->bus_id);
 791             goto out_err;
 792         }
 793     }
 794
 795     /* Find the next free id. */
 796     if (have_devno) {
 797         for (schid = 0; schid <= MAX_SCHID; schid++) {
 798             if (!css_find_subch(1, cssid, ssid, schid)) {
 799                 sch->schid = schid;
 800                 css_subch_assign(cssid, ssid, schid, devno, sch);
 801                 found = true;
 802                 break;
 803             }
 804         }
 805         if (!found) {
 806             error_setg(errp, "No free subchannel found for %x.%x.%04x",
 807                        cssid, ssid, devno);
 808             goto out_err;
 809         }
 810         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 811                                     "user-configured");
 812     } else {
 813         cssid = VIRTUAL_CSSID;
 814         for (ssid = 0; ssid <= MAX_SSID; ssid++) {
 815             for (schid = 0; schid <= MAX_SCHID; schid++) {
 816                 if (!css_find_subch(1, cssid, ssid, schid)) {
 817                     sch->cssid = cssid;
 818                     sch->ssid = ssid;
 819                     sch->schid = schid;
 820                     devno = schid;
 821                     /*
 822                      * If the devno is already taken, look further in this
 823                      * subchannel set.
 824                      */
 825                     while (css_devno_used(cssid, ssid, devno)) {
 826                         if (devno == MAX_SCHID) {
 827                             devno = 0;
 828                         } else if (devno == schid - 1) {
 829                             error_setg(errp, "No free devno found");
 830                             goto out_err;
 831                         } else {
 832                             devno++;
 833                         }
 834                     }
 835                     sch->devno = devno;
 836                     css_subch_assign(cssid, ssid, schid, devno, sch);
 837                     found = true;
 838                     break;
 839                 }
 840             }
 841             if (found) {
 842                 break;
 843             }
 844         }
 845         if (!found) {
 846             error_setg(errp, "Virtual channel subsystem is full!");
 847             goto out_err;
 848         }
 849         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 850                                     "auto-configured");
 851     }
 852
 853     /* Build initial schib. */
 854     css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
 855
 856     sch->ccw_cb = virtio_ccw_cb;
 857     sch->disable_cb = virtio_sch_disable_cb;
 858
 859     /* Build senseid data. */
 860     memset(&sch->id, 0, sizeof(SenseId));
 861     sch->id.reserved = 0xff;
 862     sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
 863
 864     dev->revision = -1;
 865
 866     if (k->realize) {
 867         k->realize(dev, &err);
 868     }
 869     if (err) {
 870         error_propagate(errp, err);
 871         css_subch_assign(cssid, ssid, schid, devno, NULL);
 872         goto out_err;
 873     }
 874
 875     return;
 876
 877 out_err:
 878     dev->sch = NULL;
 879     g_free(sch);
 880 }
 881
 882 static int virtio_ccw_exit(VirtioCcwDevice *dev)
 883 {
 884     SubchDev *sch = dev->sch;
 885
 886     if (sch) {
 887         css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 888         g_free(sch);
 889     }
 890     if (dev->indicators) {
 891         release_indicator(&dev->routes.adapter, dev->indicators);
 892         dev->indicators = NULL;
 893     }
 894     return 0;
 895 }
 896
 897 static void virtio_ccw_net_realize(VirtioCcwDevice *ccw_dev, Error **errp)
 898 {
 899     DeviceState *qdev = DEVICE(ccw_dev);
 900     VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev);
 901     DeviceState *vdev = DEVICE(&dev->vdev);
 902     Error *err = NULL;
 903
 904     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
 905                                   object_get_typename(OBJECT(qdev)));
 906     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 907     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
 908     if (err) {
 909         error_propagate(errp, err);
 910     }
 911 }
 912
 913 static void virtio_ccw_net_instance_init(Object *obj)
 914 {
 915     VirtIONetCcw *dev = VIRTIO_NET_CCW(obj);
 916
 917     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 918                                 TYPE_VIRTIO_NET);
 919     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
 920                               "bootindex", &error_abort);
 921 }
 922
 923 static void virtio_ccw_blk_realize(VirtioCcwDevice *ccw_dev, Error **errp)
 924 {
 925     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev);
 926     DeviceState *vdev = DEVICE(&dev->vdev);
 927     Error *err = NULL;
 928
 929     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 930     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
 931     if (err) {
 932         error_propagate(errp, err);
 933     }
 934 }
 935
 936 static void virtio_ccw_blk_instance_init(Object *obj)
 937 {
 938     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj);
 939
 940     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 941                                 TYPE_VIRTIO_BLK);
 942     object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
 943                               &error_abort);
 944     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
 945                               "bootindex", &error_abort);
 946 }
 947
 948 static void virtio_ccw_serial_realize(VirtioCcwDevice *ccw_dev, Error **errp)
 949 {
 950     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev);
 951     DeviceState *vdev = DEVICE(&dev->vdev);
 952     DeviceState *proxy = DEVICE(ccw_dev);
 953     Error *err = NULL;
 954     char *bus_name;
 955
 956     /*
 957      * For command line compatibility, this sets the virtio-serial-device bus
 958      * name as before.
 959      */
 960     if (proxy->id) {
 961         bus_name = g_strdup_printf("%s.0", proxy->id);
 962         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
 963         g_free(bus_name);
 964     }
 965
 966     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 967     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
 968     if (err) {
 969         error_propagate(errp, err);
 970     }
 971 }
 972
 973
 974 static void virtio_ccw_serial_instance_init(Object *obj)
 975 {
 976     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj);
 977
 978     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 979                                 TYPE_VIRTIO_SERIAL);
 980 }
 981
 982 static void virtio_ccw_balloon_realize(VirtioCcwDevice *ccw_dev, Error **errp)
 983 {
 984     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev);
 985     DeviceState *vdev = DEVICE(&dev->vdev);
 986     Error *err = NULL;
 987
 988     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 989     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
 990     if (err) {
 991         error_propagate(errp, err);
 992     }
 993 }
 994
 995 static void virtio_ccw_balloon_instance_init(Object *obj)
 996 {
 997     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj);
 998
 999     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1000                                 TYPE_VIRTIO_BALLOON);
1001     object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev),
1002                               "guest-stats", &error_abort);
1003     object_property_add_alias(obj, "guest-stats-polling-interval",
1004                               OBJECT(&dev->vdev),
1005                               "guest-stats-polling-interval", &error_abort);
1006 }
1007
1008 static void virtio_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1009 {
1010     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev);
1011     DeviceState *vdev = DEVICE(&dev->vdev);
1012     DeviceState *qdev = DEVICE(ccw_dev);
1013     Error *err = NULL;
1014     char *bus_name;
1015
1016     /*
1017      * For command line compatibility, this sets the virtio-scsi-device bus
1018      * name as before.
1019      */
1020     if (qdev->id) {
1021         bus_name = g_strdup_printf("%s.0", qdev->id);
1022         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1023         g_free(bus_name);
1024     }
1025
1026     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1027     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1028     if (err) {
1029         error_propagate(errp, err);
1030     }
1031 }
1032
1033 static void virtio_ccw_scsi_instance_init(Object *obj)
1034 {
1035     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj);
1036
1037     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1038                                 TYPE_VIRTIO_SCSI);
1039     object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread",
1040                               &error_abort);
1041 }
1042
1043 #ifdef CONFIG_VHOST_SCSI
1044 static void vhost_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1045 {
1046     VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
1047     DeviceState *vdev = DEVICE(&dev->vdev);
1048     Error *err = NULL;
1049
1050     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1051     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1052     if (err) {
1053         error_propagate(errp, err);
1054     }
1055 }
1056
1057 static void vhost_ccw_scsi_instance_init(Object *obj)
1058 {
1059     VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
1060
1061     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1062                                 TYPE_VHOST_SCSI);
1063 }
1064 #endif
1065
1066 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1067 {
1068     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
1069     DeviceState *vdev = DEVICE(&dev->vdev);
1070     Error *err = NULL;
1071
1072     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1073     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1074     if (err) {
1075         error_propagate(errp, err);
1076         return;
1077     }
1078
1079     object_property_set_link(OBJECT(dev),
1080                              OBJECT(dev->vdev.conf.rng), "rng",
1081                              NULL);
1082 }
1083
1084 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
1085  * be careful and test performance if you change this.
1086  */
1087 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
1088 {
1089     return container_of(d, VirtioCcwDevice, parent_obj);
1090 }
1091
1092 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc,
1093                                      uint8_t to_be_set)
1094 {
1095     uint8_t ind_old, ind_new;
1096     hwaddr len = 1;
1097     uint8_t *ind_addr;
1098
1099     ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
1100     if (!ind_addr) {
1101         error_report("%s(%x.%x.%04x): unable to access indicator",
1102                      __func__, sch->cssid, sch->ssid, sch->schid);
1103         return -1;
1104     }
1105     do {
1106         ind_old = *ind_addr;
1107         ind_new = ind_old | to_be_set;
1108     } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
1109     cpu_physical_memory_unmap(ind_addr, len, 1, len);
1110
1111     return ind_old;
1112 }
1113
1114 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
1115 {
1116     VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
1117     SubchDev *sch = dev->sch;
1118     uint64_t indicators;
1119
1120     /* queue indicators + secondary indicators */
1121     if (vector >= VIRTIO_CCW_QUEUE_MAX + 64) {
1122         return;
1123     }
1124
1125     if (vector < VIRTIO_CCW_QUEUE_MAX) {
1126         if (!dev->indicators) {
1127             return;
1128         }
1129         if (sch->thinint_active) {
1130             /*
1131              * In the adapter interrupt case, indicators points to a
1132              * memory area that may be (way) larger than 64 bit and
1133              * ind_bit indicates the start of the indicators in a big
1134              * endian notation.
1135              */
1136             uint64_t ind_bit = dev->routes.adapter.ind_offset;
1137
1138             virtio_set_ind_atomic(sch, dev->indicators->addr +
1139                                   (ind_bit + vector) / 8,
1140                                   0x80 >> ((ind_bit + vector) % 8));
1141             if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr,
1142                                        0x01)) {
1143                 css_adapter_interrupt(dev->thinint_isc);
1144             }
1145         } else {
1146             indicators = address_space_ldq(&address_space_memory,
1147                                            dev->indicators->addr,
1148                                            MEMTXATTRS_UNSPECIFIED,
1149                                            NULL);
1150             indicators |= 1ULL << vector;
1151             address_space_stq(&address_space_memory, dev->indicators->addr,
1152                               indicators, MEMTXATTRS_UNSPECIFIED, NULL);
1153             css_conditional_io_interrupt(sch);
1154         }
1155     } else {
1156         if (!dev->indicators2) {
1157             return;
1158         }
1159         vector = 0;
1160         indicators = address_space_ldq(&address_space_memory,
1161                                        dev->indicators2->addr,
1162                                        MEMTXATTRS_UNSPECIFIED,
1163                                        NULL);
1164         indicators |= 1ULL << vector;
1165         address_space_stq(&address_space_memory, dev->indicators2->addr,
1166                           indicators, MEMTXATTRS_UNSPECIFIED, NULL);
1167         css_conditional_io_interrupt(sch);
1168     }
1169 }
1170
1171 static void virtio_ccw_reset(DeviceState *d)
1172 {
1173     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1174     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1175
1176     virtio_ccw_reset_virtio(dev, vdev);
1177     css_reset_sch(dev->sch);
1178 }
1179
1180 static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
1181 {
1182     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1183
1184     if (running) {
1185         virtio_ccw_start_ioeventfd(dev);
1186     } else {
1187         virtio_ccw_stop_ioeventfd(dev);
1188     }
1189 }
1190
1191 static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
1192 {
1193     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1194
1195     return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
1196 }
1197
1198 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
1199 {
1200     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1201
1202     /* Stop using the generic ioeventfd, we are doing eventfd handling
1203      * ourselves below */
1204     dev->ioeventfd_disabled = assign;
1205     if (assign) {
1206         virtio_ccw_stop_ioeventfd(dev);
1207     }
1208     return virtio_ccw_set_guest2host_notifier(dev, n, assign, false);
1209 }
1210
1211 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev)
1212 {
1213     int r;
1214
1215     if (!dev->sch->thinint_active) {
1216         return -EINVAL;
1217     }
1218
1219     r = map_indicator(&dev->routes.adapter, dev->summary_indicator);
1220     if (r) {
1221         return r;
1222     }
1223     r = map_indicator(&dev->routes.adapter, dev->indicators);
1224     if (r) {
1225         return r;
1226     }
1227     dev->routes.adapter.summary_addr = dev->summary_indicator->map;
1228     dev->routes.adapter.ind_addr = dev->indicators->map;
1229
1230     return 0;
1231 }
1232
1233 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs)
1234 {
1235     int i;
1236     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1237     int ret;
1238     S390FLICState *fs = s390_get_flic();
1239     S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
1240
1241     ret = virtio_ccw_get_mappings(dev);
1242     if (ret) {
1243         return ret;
1244     }
1245     for (i = 0; i < nvqs; i++) {
1246         if (!virtio_queue_get_num(vdev, i)) {
1247             break;
1248         }
1249     }
1250     dev->routes.num_routes = i;
1251     return fsc->add_adapter_routes(fs, &dev->routes);
1252 }
1253
1254 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs)
1255 {
1256     S390FLICState *fs = s390_get_flic();
1257     S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
1258
1259     fsc->release_adapter_routes(fs, &dev->routes);
1260 }
1261
1262 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n)
1263 {
1264     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1265     VirtQueue *vq = virtio_get_queue(vdev, n);
1266     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1267
1268     return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL,
1269                                               dev->routes.gsi[n]);
1270 }
1271
1272 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n)
1273 {
1274     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1275     VirtQueue *vq = virtio_get_queue(vdev, n);
1276     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1277     int ret;
1278
1279     ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier,
1280                                                 dev->routes.gsi[n]);
1281     assert(ret == 0);
1282 }
1283
1284 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
1285                                          bool assign, bool with_irqfd)
1286 {
1287     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1288     VirtQueue *vq = virtio_get_queue(vdev, n);
1289     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1290     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
1291
1292     if (assign) {
1293         int r = event_notifier_init(notifier, 0);
1294
1295         if (r < 0) {
1296             return r;
1297         }
1298         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
1299         if (with_irqfd) {
1300             r = virtio_ccw_add_irqfd(dev, n);
1301             if (r) {
1302                 virtio_queue_set_guest_notifier_fd_handler(vq, false,
1303                                                            with_irqfd);
1304                 return r;
1305             }
1306         }
1307         /*
1308          * We do not support individual masking for channel devices, so we
1309          * need to manually trigger any guest masking callbacks here.
1310          */
1311         if (k->guest_notifier_mask) {
1312             k->guest_notifier_mask(vdev, n, false);
1313         }
1314         /* get lost events and re-inject */
1315         if (k->guest_notifier_pending &&
1316             k->guest_notifier_pending(vdev, n)) {
1317             event_notifier_set(notifier);
1318         }
1319     } else {
1320         if (k->guest_notifier_mask) {
1321             k->guest_notifier_mask(vdev, n, true);
1322         }
1323         if (with_irqfd) {
1324             virtio_ccw_remove_irqfd(dev, n);
1325         }
1326         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
1327         event_notifier_cleanup(notifier);
1328     }
1329     return 0;
1330 }
1331
1332 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
1333                                           bool assigned)
1334 {
1335     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1336     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1337     bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled();
1338     int r, n;
1339
1340     if (with_irqfd && assigned) {
1341         /* irq routes need to be set up before assigning irqfds */
1342         r = virtio_ccw_setup_irqroutes(dev, nvqs);
1343         if (r < 0) {
1344             goto irqroute_error;
1345         }
1346     }
1347     for (n = 0; n < nvqs; n++) {
1348         if (!virtio_queue_get_num(vdev, n)) {
1349             break;
1350         }
1351         r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd);
1352         if (r < 0) {
1353             goto assign_error;
1354         }
1355     }
1356     if (with_irqfd && !assigned) {
1357         /* release irq routes after irqfds have been released */
1358         virtio_ccw_release_irqroutes(dev, nvqs);
1359     }
1360     return 0;
1361
1362 assign_error:
1363     while (--n >= 0) {
1364         virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
1365     }
1366 irqroute_error:
1367     if (with_irqfd && assigned) {
1368         virtio_ccw_release_irqroutes(dev, nvqs);
1369     }
1370     return r;
1371 }
1372
1373 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f)
1374 {
1375     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1376     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1377
1378     qemu_put_be16(f, virtio_queue_vector(vdev, n));
1379 }
1380
1381 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f)
1382 {
1383     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1384     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1385     uint16_t vector;
1386
1387     qemu_get_be16s(f, &vector);
1388     virtio_queue_set_vector(vdev, n , vector);
1389
1390     return 0;
1391 }
1392
1393 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
1394 {
1395     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1396     SubchDev *s = dev->sch;
1397     VirtIODevice *vdev = virtio_ccw_get_vdev(s);
1398
1399     subch_device_save(s, f);
1400     if (dev->indicators != NULL) {
1401         qemu_put_be32(f, dev->indicators->len);
1402         qemu_put_be64(f, dev->indicators->addr);
1403     } else {
1404         qemu_put_be32(f, 0);
1405         qemu_put_be64(f, 0UL);
1406     }
1407     if (dev->indicators2 != NULL) {
1408         qemu_put_be32(f, dev->indicators2->len);
1409         qemu_put_be64(f, dev->indicators2->addr);
1410     } else {
1411         qemu_put_be32(f, 0);
1412         qemu_put_be64(f, 0UL);
1413     }
1414     if (dev->summary_indicator != NULL) {
1415         qemu_put_be32(f, dev->summary_indicator->len);
1416         qemu_put_be64(f, dev->summary_indicator->addr);
1417     } else {
1418         qemu_put_be32(f, 0);
1419         qemu_put_be64(f, 0UL);
1420     }
1421     qemu_put_be16(f, vdev->config_vector);
1422     qemu_put_be64(f, dev->routes.adapter.ind_offset);
1423     qemu_put_byte(f, dev->thinint_isc);
1424     qemu_put_be32(f, dev->revision);
1425 }
1426
1427 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
1428 {
1429     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1430     SubchDev *s = dev->sch;
1431     VirtIODevice *vdev = virtio_ccw_get_vdev(s);
1432     int len;
1433
1434     s->driver_data = dev;
1435     subch_device_load(s, f);
1436     len = qemu_get_be32(f);
1437     if (len != 0) {
1438         dev->indicators = get_indicator(qemu_get_be64(f), len);
1439     } else {
1440         qemu_get_be64(f);
1441         dev->indicators = NULL;
1442     }
1443     len = qemu_get_be32(f);
1444     if (len != 0) {
1445         dev->indicators2 = get_indicator(qemu_get_be64(f), len);
1446     } else {
1447         qemu_get_be64(f);
1448         dev->indicators2 = NULL;
1449     }
1450     len = qemu_get_be32(f);
1451     if (len != 0) {
1452         dev->summary_indicator = get_indicator(qemu_get_be64(f), len);
1453     } else {
1454         qemu_get_be64(f);
1455         dev->summary_indicator = NULL;
1456     }
1457     qemu_get_be16s(f, &vdev->config_vector);
1458     dev->routes.adapter.ind_offset = qemu_get_be64(f);
1459     dev->thinint_isc = qemu_get_byte(f);
1460     dev->revision = qemu_get_be32(f);
1461     if (s->thinint_active) {
1462         return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO,
1463                                        dev->thinint_isc, true, false,
1464                                        &dev->routes.adapter.adapter_id);
1465     }
1466
1467     return 0;
1468 }
1469
1470 /* This is called by virtio-bus just after the device is plugged. */
1471 static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
1472 {
1473     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1474     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1475     SubchDev *sch = dev->sch;
1476     int n = virtio_get_num_queues(vdev);
1477
1478     if (virtio_get_num_queues(vdev) > VIRTIO_CCW_QUEUE_MAX) {
1479         error_setg(errp, "The nubmer of virtqueues %d "
1480                    "exceeds ccw limit %d", n,
1481                    VIRTIO_CCW_QUEUE_MAX);
1482         return;
1483     }
1484
1485     if (!kvm_eventfds_enabled()) {
1486         dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
1487     }
1488
1489     sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);
1490
1491     if (dev->max_rev >= 1) {
1492         virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1493     }
1494
1495     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
1496                           d->hotplugged, 1);
1497 }
1498
1499 static void virtio_ccw_post_plugged(DeviceState *d, Error **errp)
1500 {
1501    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1502    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1503
1504    if (!virtio_host_has_feature(vdev, VIRTIO_F_VERSION_1)) {
1505         /* A backend didn't support modern virtio. */
1506        dev->max_rev = 0;
1507    }
1508 }
1509
1510 static void virtio_ccw_device_unplugged(DeviceState *d)
1511 {
1512     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1513
1514     virtio_ccw_stop_ioeventfd(dev);
1515 }
1516 /**************** Virtio-ccw Bus Device Descriptions *******************/
1517
1518 static Property virtio_ccw_net_properties[] = {
1519     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1520     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1521                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1522     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1523                        VIRTIO_CCW_MAX_REV),
1524     DEFINE_PROP_END_OF_LIST(),
1525 };
1526
1527 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
1528 {
1529     DeviceClass *dc = DEVICE_CLASS(klass);
1530     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1531
1532     k->realize = virtio_ccw_net_realize;
1533     k->exit = virtio_ccw_exit;
1534     dc->reset = virtio_ccw_reset;
1535     dc->props = virtio_ccw_net_properties;
1536     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1537 }
1538
1539 static const TypeInfo virtio_ccw_net = {
1540     .name          = TYPE_VIRTIO_NET_CCW,
1541     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1542     .instance_size = sizeof(VirtIONetCcw),
1543     .instance_init = virtio_ccw_net_instance_init,
1544     .class_init    = virtio_ccw_net_class_init,
1545 };
1546
1547 static Property virtio_ccw_blk_properties[] = {
1548     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1549     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1550                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1551     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1552                        VIRTIO_CCW_MAX_REV),
1553     DEFINE_PROP_END_OF_LIST(),
1554 };
1555
1556 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
1557 {
1558     DeviceClass *dc = DEVICE_CLASS(klass);
1559     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1560
1561     k->realize = virtio_ccw_blk_realize;
1562     k->exit = virtio_ccw_exit;
1563     dc->reset = virtio_ccw_reset;
1564     dc->props = virtio_ccw_blk_properties;
1565     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1566 }
1567
1568 static const TypeInfo virtio_ccw_blk = {
1569     .name          = TYPE_VIRTIO_BLK_CCW,
1570     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1571     .instance_size = sizeof(VirtIOBlkCcw),
1572     .instance_init = virtio_ccw_blk_instance_init,
1573     .class_init    = virtio_ccw_blk_class_init,
1574 };
1575
1576 static Property virtio_ccw_serial_properties[] = {
1577     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1578     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1579                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1580     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1581                        VIRTIO_CCW_MAX_REV),
1582     DEFINE_PROP_END_OF_LIST(),
1583 };
1584
1585 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
1586 {
1587     DeviceClass *dc = DEVICE_CLASS(klass);
1588     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1589
1590     k->realize = virtio_ccw_serial_realize;
1591     k->exit = virtio_ccw_exit;
1592     dc->reset = virtio_ccw_reset;
1593     dc->props = virtio_ccw_serial_properties;
1594     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
1595 }
1596
1597 static const TypeInfo virtio_ccw_serial = {
1598     .name          = TYPE_VIRTIO_SERIAL_CCW,
1599     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1600     .instance_size = sizeof(VirtioSerialCcw),
1601     .instance_init = virtio_ccw_serial_instance_init,
1602     .class_init    = virtio_ccw_serial_class_init,
1603 };
1604
1605 static Property virtio_ccw_balloon_properties[] = {
1606     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1607     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1608                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1609     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1610                        VIRTIO_CCW_MAX_REV),
1611     DEFINE_PROP_END_OF_LIST(),
1612 };
1613
1614 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
1615 {
1616     DeviceClass *dc = DEVICE_CLASS(klass);
1617     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1618
1619     k->realize = virtio_ccw_balloon_realize;
1620     k->exit = virtio_ccw_exit;
1621     dc->reset = virtio_ccw_reset;
1622     dc->props = virtio_ccw_balloon_properties;
1623     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1624 }
1625
1626 static const TypeInfo virtio_ccw_balloon = {
1627     .name          = TYPE_VIRTIO_BALLOON_CCW,
1628     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1629     .instance_size = sizeof(VirtIOBalloonCcw),
1630     .instance_init = virtio_ccw_balloon_instance_init,
1631     .class_init    = virtio_ccw_balloon_class_init,
1632 };
1633
1634 static Property virtio_ccw_scsi_properties[] = {
1635     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1636     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1637                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1638     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1639                        VIRTIO_CCW_MAX_REV),
1640     DEFINE_PROP_END_OF_LIST(),
1641 };
1642
1643 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
1644 {
1645     DeviceClass *dc = DEVICE_CLASS(klass);
1646     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1647
1648     k->realize = virtio_ccw_scsi_realize;
1649     k->exit = virtio_ccw_exit;
1650     dc->reset = virtio_ccw_reset;
1651     dc->props = virtio_ccw_scsi_properties;
1652     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1653 }
1654
1655 static const TypeInfo virtio_ccw_scsi = {
1656     .name          = TYPE_VIRTIO_SCSI_CCW,
1657     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1658     .instance_size = sizeof(VirtIOSCSICcw),
1659     .instance_init = virtio_ccw_scsi_instance_init,
1660     .class_init    = virtio_ccw_scsi_class_init,
1661 };
1662
1663 #ifdef CONFIG_VHOST_SCSI
1664 static Property vhost_ccw_scsi_properties[] = {
1665     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1666     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1667                        VIRTIO_CCW_MAX_REV),
1668     DEFINE_PROP_END_OF_LIST(),
1669 };
1670
1671 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
1672 {
1673     DeviceClass *dc = DEVICE_CLASS(klass);
1674     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1675
1676     k->realize = vhost_ccw_scsi_realize;
1677     k->exit = virtio_ccw_exit;
1678     dc->reset = virtio_ccw_reset;
1679     dc->props = vhost_ccw_scsi_properties;
1680     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1681 }
1682
1683 static const TypeInfo vhost_ccw_scsi = {
1684     .name          = TYPE_VHOST_SCSI_CCW,
1685     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1686     .instance_size = sizeof(VHostSCSICcw),
1687     .instance_init = vhost_ccw_scsi_instance_init,
1688     .class_init    = vhost_ccw_scsi_class_init,
1689 };
1690 #endif
1691
1692 static void virtio_ccw_rng_instance_init(Object *obj)
1693 {
1694     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
1695
1696     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1697                                 TYPE_VIRTIO_RNG);
1698     object_property_add_alias(obj, "rng", OBJECT(&dev->vdev),
1699                               "rng", &error_abort);
1700 }
1701
1702 static Property virtio_ccw_rng_properties[] = {
1703     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1704     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1705                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1706     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1707                        VIRTIO_CCW_MAX_REV),
1708     DEFINE_PROP_END_OF_LIST(),
1709 };
1710
1711 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
1712 {
1713     DeviceClass *dc = DEVICE_CLASS(klass);
1714     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1715
1716     k->realize = virtio_ccw_rng_realize;
1717     k->exit = virtio_ccw_exit;
1718     dc->reset = virtio_ccw_reset;
1719     dc->props = virtio_ccw_rng_properties;
1720     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1721 }
1722
1723 static const TypeInfo virtio_ccw_rng = {
1724     .name          = TYPE_VIRTIO_RNG_CCW,
1725     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1726     .instance_size = sizeof(VirtIORNGCcw),
1727     .instance_init = virtio_ccw_rng_instance_init,
1728     .class_init    = virtio_ccw_rng_class_init,
1729 };
1730
1731 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp)
1732 {
1733     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1734
1735     virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1736     virtio_ccw_device_realize(_dev, errp);
1737 }
1738
1739 static int virtio_ccw_busdev_exit(DeviceState *dev)
1740 {
1741     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1742     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1743
1744     return _info->exit(_dev);
1745 }
1746
1747 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev,
1748                                      DeviceState *dev, Error **errp)
1749 {
1750     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1751     SubchDev *sch = _dev->sch;
1752
1753     virtio_ccw_stop_ioeventfd(_dev);
1754
1755     /*
1756      * We should arrive here only for device_del, since we don't support
1757      * direct hot(un)plug of channels, but only through virtio.
1758      */
1759     assert(sch != NULL);
1760     /* Subchannel is now disabled and no longer valid. */
1761     sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
1762                                      PMCW_FLAGS_MASK_DNV);
1763
1764     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
1765
1766     object_unparent(OBJECT(dev));
1767 }
1768
1769 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1770 {
1771     DeviceClass *dc = DEVICE_CLASS(klass);
1772
1773     dc->realize = virtio_ccw_busdev_realize;
1774     dc->exit = virtio_ccw_busdev_exit;
1775     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1776 }
1777
1778 static const TypeInfo virtio_ccw_device_info = {
1779     .name = TYPE_VIRTIO_CCW_DEVICE,
1780     .parent = TYPE_DEVICE,
1781     .instance_size = sizeof(VirtioCcwDevice),
1782     .class_init = virtio_ccw_device_class_init,
1783     .class_size = sizeof(VirtIOCCWDeviceClass),
1784     .abstract = true,
1785 };
1786
1787 /***************** Virtual-css Bus Bridge Device ********************/
1788 /* Only required to have the virtio bus as child in the system bus */
1789
1790 static int virtual_css_bridge_init(SysBusDevice *dev)
1791 {
1792     /* nothing */
1793     return 0;
1794 }
1795
1796 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
1797 {
1798     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1799     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
1800     DeviceClass *dc = DEVICE_CLASS(klass);
1801
1802     k->init = virtual_css_bridge_init;
1803     hc->unplug = virtio_ccw_busdev_unplug;
1804     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
1805 }
1806
1807 static const TypeInfo virtual_css_bridge_info = {
1808     .name          = "virtual-css-bridge",
1809     .parent        = TYPE_SYS_BUS_DEVICE,
1810     .instance_size = sizeof(SysBusDevice),
1811     .class_init    = virtual_css_bridge_class_init,
1812     .interfaces = (InterfaceInfo[]) {
1813         { TYPE_HOTPLUG_HANDLER },
1814         { }
1815     }
1816 };
1817
1818 /* virtio-ccw-bus */
1819
1820 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1821                                VirtioCcwDevice *dev)
1822 {
1823     DeviceState *qdev = DEVICE(dev);
1824     char virtio_bus_name[] = "virtio-bus";
1825
1826     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1827                         qdev, virtio_bus_name);
1828 }
1829
1830 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1831 {
1832     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1833     BusClass *bus_class = BUS_CLASS(klass);
1834
1835     bus_class->max_dev = 1;
1836     k->notify = virtio_ccw_notify;
1837     k->vmstate_change = virtio_ccw_vmstate_change;
1838     k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1839     k->set_host_notifier = virtio_ccw_set_host_notifier;
1840     k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1841     k->save_queue = virtio_ccw_save_queue;
1842     k->load_queue = virtio_ccw_load_queue;
1843     k->save_config = virtio_ccw_save_config;
1844     k->load_config = virtio_ccw_load_config;
1845     k->device_plugged = virtio_ccw_device_plugged;
1846     k->post_plugged = virtio_ccw_post_plugged;
1847     k->device_unplugged = virtio_ccw_device_unplugged;
1848 }
1849
1850 static const TypeInfo virtio_ccw_bus_info = {
1851     .name = TYPE_VIRTIO_CCW_BUS,
1852     .parent = TYPE_VIRTIO_BUS,
1853     .instance_size = sizeof(VirtioCcwBusState),
1854     .class_init = virtio_ccw_bus_class_init,
1855 };
1856
1857 #ifdef CONFIG_VIRTFS
1858 static Property virtio_ccw_9p_properties[] = {
1859     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1860     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1861             VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1862     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1863                        VIRTIO_CCW_MAX_REV),
1864     DEFINE_PROP_END_OF_LIST(),
1865 };
1866
1867 static void virtio_ccw_9p_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1868 {
1869     V9fsCCWState *dev = VIRTIO_9P_CCW(ccw_dev);
1870     DeviceState *vdev = DEVICE(&dev->vdev);
1871     Error *err = NULL;
1872
1873     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1874     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1875     if (err) {
1876         error_propagate(errp, err);
1877     }
1878 }
1879
1880 static void virtio_ccw_9p_class_init(ObjectClass *klass, void *data)
1881 {
1882     DeviceClass *dc = DEVICE_CLASS(klass);
1883     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1884
1885     k->exit = virtio_ccw_exit;
1886     k->realize = virtio_ccw_9p_realize;
1887     dc->reset = virtio_ccw_reset;
1888     dc->props = virtio_ccw_9p_properties;
1889     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1890 }
1891
1892 static void virtio_ccw_9p_instance_init(Object *obj)
1893 {
1894     V9fsCCWState *dev = VIRTIO_9P_CCW(obj);
1895
1896     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1897                                 TYPE_VIRTIO_9P);
1898 }
1899
1900 static const TypeInfo virtio_ccw_9p_info = {
1901     .name          = TYPE_VIRTIO_9P_CCW,
1902     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1903     .instance_size = sizeof(V9fsCCWState),
1904     .instance_init = virtio_ccw_9p_instance_init,
1905     .class_init    = virtio_ccw_9p_class_init,
1906 };
1907 #endif
1908
1909 static void virtio_ccw_register(void)
1910 {
1911     type_register_static(&virtio_ccw_bus_info);
1912     type_register_static(&virtual_css_bus_info);
1913     type_register_static(&virtio_ccw_device_info);
1914     type_register_static(&virtio_ccw_serial);
1915     type_register_static(&virtio_ccw_blk);
1916     type_register_static(&virtio_ccw_net);
1917     type_register_static(&virtio_ccw_balloon);
1918     type_register_static(&virtio_ccw_scsi);
1919 #ifdef CONFIG_VHOST_SCSI
1920     type_register_static(&vhost_ccw_scsi);
1921 #endif
1922     type_register_static(&virtio_ccw_rng);
1923     type_register_static(&virtual_css_bridge_info);
1924 #ifdef CONFIG_VIRTFS
1925     type_register_static(&virtio_ccw_9p_info);
1926 #endif
1927 }
1928
1929 type_init(virtio_ccw_register)