hw/s390x/virtio-ccw.c

   1 /*
   2  * virtio ccw target implementation
   3  *
   4  * Copyright 2012 IBM Corp.
   5  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #include "hw/hw.h"
  13 #include "block/block.h"
  14 #include "sysemu/blockdev.h"
  15 #include "sysemu/sysemu.h"
  16 #include "net/net.h"
  17 #include "monitor/monitor.h"
  18 #include "hw/virtio/virtio.h"
  19 #include "hw/virtio/virtio-serial.h"
  20 #include "hw/virtio/virtio-net.h"
  21 #include "hw/sysbus.h"
  22 #include "qemu/bitops.h"
  23 #include "hw/virtio/virtio-bus.h"
  24
  25 #include "ioinst.h"
  26 #include "css.h"
  27 #include "virtio-ccw.h"
  28 #include "trace.h"
  29
  30 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
  31                                VirtioCcwDevice *dev);
  32
  33 static void virtual_css_bus_reset(BusState *qbus)
  34 {
  35     /* This should actually be modelled via the generic css */
  36     css_reset();
  37 }
  38
  39
  40 static void virtual_css_bus_class_init(ObjectClass *klass, void *data)
  41 {
  42     BusClass *k = BUS_CLASS(klass);
  43
  44     k->reset = virtual_css_bus_reset;
  45 }
  46
  47 static const TypeInfo virtual_css_bus_info = {
  48     .name = TYPE_VIRTUAL_CSS_BUS,
  49     .parent = TYPE_BUS,
  50     .instance_size = sizeof(VirtualCssBus),
  51     .class_init = virtual_css_bus_class_init,
  52 };
  53
  54 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
  55 {
  56     VirtIODevice *vdev = NULL;
  57     VirtioCcwDevice *dev = sch->driver_data;
  58
  59     if (dev) {
  60         vdev = virtio_bus_get_device(&dev->bus);
  61     }
  62     return vdev;
  63 }
  64
  65 static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
  66                                               bool assign, bool set_handler)
  67 {
  68     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
  69     VirtQueue *vq = virtio_get_queue(vdev, n);
  70     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
  71     int r = 0;
  72     SubchDev *sch = dev->sch;
  73     uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
  74
  75     if (assign) {
  76         r = event_notifier_init(notifier, 1);
  77         if (r < 0) {
  78             error_report("%s: unable to init event notifier: %d", __func__, r);
  79             return r;
  80         }
  81         virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
  82         r = s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
  83         if (r < 0) {
  84             error_report("%s: unable to assign ioeventfd: %d", __func__, r);
  85             virtio_queue_set_host_notifier_fd_handler(vq, false, false);
  86             event_notifier_cleanup(notifier);
  87             return r;
  88         }
  89     } else {
  90         virtio_queue_set_host_notifier_fd_handler(vq, false, false);
  91         s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
  92         event_notifier_cleanup(notifier);
  93     }
  94     return r;
  95 }
  96
  97 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
  98 {
  99     VirtIODevice *vdev;
 100     int n, r;
 101
 102     if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) ||
 103         dev->ioeventfd_disabled ||
 104         dev->ioeventfd_started) {
 105         return;
 106     }
 107     vdev = virtio_bus_get_device(&dev->bus);
 108     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 109         if (!virtio_queue_get_num(vdev, n)) {
 110             continue;
 111         }
 112         r = virtio_ccw_set_guest2host_notifier(dev, n, true, true);
 113         if (r < 0) {
 114             goto assign_error;
 115         }
 116     }
 117     dev->ioeventfd_started = true;
 118     return;
 119
 120   assign_error:
 121     while (--n >= 0) {
 122         if (!virtio_queue_get_num(vdev, n)) {
 123             continue;
 124         }
 125         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 126         assert(r >= 0);
 127     }
 128     dev->ioeventfd_started = false;
 129     /* Disable ioeventfd for this device. */
 130     dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
 131     error_report("%s: failed. Fallback to userspace (slower).", __func__);
 132 }
 133
 134 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
 135 {
 136     VirtIODevice *vdev;
 137     int n, r;
 138
 139     if (!dev->ioeventfd_started) {
 140         return;
 141     }
 142     vdev = virtio_bus_get_device(&dev->bus);
 143     for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
 144         if (!virtio_queue_get_num(vdev, n)) {
 145             continue;
 146         }
 147         r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
 148         assert(r >= 0);
 149     }
 150     dev->ioeventfd_started = false;
 151 }
 152
 153 VirtualCssBus *virtual_css_bus_init(void)
 154 {
 155     VirtualCssBus *cbus;
 156     BusState *bus;
 157     DeviceState *dev;
 158
 159     /* Create bridge device */
 160     dev = qdev_create(NULL, "virtual-css-bridge");
 161     qdev_init_nofail(dev);
 162
 163     /* Create bus on bridge device */
 164     bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
 165     cbus = VIRTUAL_CSS_BUS(bus);
 166
 167     /* Enable hotplugging */
 168     bus->allow_hotplug = 1;
 169
 170     return cbus;
 171 }
 172
 173 /* Communication blocks used by several channel commands. */
 174 typedef struct VqInfoBlock {
 175     uint64_t queue;
 176     uint32_t align;
 177     uint16_t index;
 178     uint16_t num;
 179 } QEMU_PACKED VqInfoBlock;
 180
 181 typedef struct VqConfigBlock {
 182     uint16_t index;
 183     uint16_t num_max;
 184 } QEMU_PACKED VqConfigBlock;
 185
 186 typedef struct VirtioFeatDesc {
 187     uint32_t features;
 188     uint8_t index;
 189 } QEMU_PACKED VirtioFeatDesc;
 190
 191 /* Specify where the virtqueues for the subchannel are in guest memory. */
 192 static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align,
 193                               uint16_t index, uint16_t num)
 194 {
 195     VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
 196
 197     if (index > VIRTIO_PCI_QUEUE_MAX) {
 198         return -EINVAL;
 199     }
 200
 201     /* Current code in virtio.c relies on 4K alignment. */
 202     if (addr && (align != 4096)) {
 203         return -EINVAL;
 204     }
 205
 206     if (!vdev) {
 207         return -EINVAL;
 208     }
 209
 210     virtio_queue_set_addr(vdev, index, addr);
 211     if (!addr) {
 212         virtio_queue_set_vector(vdev, index, 0);
 213     } else {
 214         /* Fail if we don't have a big enough queue. */
 215         /* TODO: Add interface to handle vring.num changing */
 216         if (virtio_queue_get_num(vdev, index) > num) {
 217             return -EINVAL;
 218         }
 219         virtio_queue_set_vector(vdev, index, index);
 220     }
 221     /* tell notify handler in case of config change */
 222     vdev->config_vector = VIRTIO_PCI_QUEUE_MAX;
 223     return 0;
 224 }
 225
 226 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
 227 {
 228     int ret;
 229     VqInfoBlock info;
 230     uint8_t status;
 231     VirtioFeatDesc features;
 232     void *config;
 233     hwaddr indicators;
 234     VqConfigBlock vq_config;
 235     VirtioCcwDevice *dev = sch->driver_data;
 236     VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
 237     bool check_len;
 238     int len;
 239     hwaddr hw_len;
 240
 241     if (!dev) {
 242         return -EINVAL;
 243     }
 244
 245     trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
 246                                    ccw.cmd_code);
 247     check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
 248
 249     /* Look at the command. */
 250     switch (ccw.cmd_code) {
 251     case CCW_CMD_SET_VQ:
 252         if (check_len) {
 253             if (ccw.count != sizeof(info)) {
 254                 ret = -EINVAL;
 255                 break;
 256             }
 257         } else if (ccw.count < sizeof(info)) {
 258             /* Can't execute command. */
 259             ret = -EINVAL;
 260             break;
 261         }
 262         if (!ccw.cda) {
 263             ret = -EFAULT;
 264         } else {
 265             info.queue = ldq_phys(ccw.cda);
 266             info.align = ldl_phys(&address_space_memory,
 267                                   ccw.cda + sizeof(info.queue));
 268             info.index = lduw_phys(ccw.cda + sizeof(info.queue)
 269                                    + sizeof(info.align));
 270             info.num = lduw_phys(ccw.cda + sizeof(info.queue)
 271                                  + sizeof(info.align)
 272                                  + sizeof(info.index));
 273             ret = virtio_ccw_set_vqs(sch, info.queue, info.align, info.index,
 274                                      info.num);
 275             sch->curr_status.scsw.count = 0;
 276         }
 277         break;
 278     case CCW_CMD_VDEV_RESET:
 279         virtio_ccw_stop_ioeventfd(dev);
 280         virtio_reset(vdev);
 281         ret = 0;
 282         break;
 283     case CCW_CMD_READ_FEAT:
 284         if (check_len) {
 285             if (ccw.count != sizeof(features)) {
 286                 ret = -EINVAL;
 287                 break;
 288             }
 289         } else if (ccw.count < sizeof(features)) {
 290             /* Can't execute command. */
 291             ret = -EINVAL;
 292             break;
 293         }
 294         if (!ccw.cda) {
 295             ret = -EFAULT;
 296         } else {
 297             features.index = ldub_phys(ccw.cda + sizeof(features.features));
 298             if (features.index < ARRAY_SIZE(dev->host_features)) {
 299                 features.features = dev->host_features[features.index];
 300             } else {
 301                 /* Return zeroes if the guest supports more feature bits. */
 302                 features.features = 0;
 303             }
 304             stl_le_phys(ccw.cda, features.features);
 305             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 306             ret = 0;
 307         }
 308         break;
 309     case CCW_CMD_WRITE_FEAT:
 310         if (check_len) {
 311             if (ccw.count != sizeof(features)) {
 312                 ret = -EINVAL;
 313                 break;
 314             }
 315         } else if (ccw.count < sizeof(features)) {
 316             /* Can't execute command. */
 317             ret = -EINVAL;
 318             break;
 319         }
 320         if (!ccw.cda) {
 321             ret = -EFAULT;
 322         } else {
 323             features.index = ldub_phys(ccw.cda + sizeof(features.features));
 324             features.features = ldl_le_phys(&address_space_memory, ccw.cda);
 325             if (features.index < ARRAY_SIZE(dev->host_features)) {
 326                 virtio_bus_set_vdev_features(&dev->bus, features.features);
 327                 vdev->guest_features = features.features;
 328             } else {
 329                 /*
 330                  * If the guest supports more feature bits, assert that it
 331                  * passes us zeroes for those we don't support.
 332                  */
 333                 if (features.features) {
 334                     fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n",
 335                             features.index, features.features);
 336                     /* XXX: do a unit check here? */
 337                 }
 338             }
 339             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 340             ret = 0;
 341         }
 342         break;
 343     case CCW_CMD_READ_CONF:
 344         if (check_len) {
 345             if (ccw.count > vdev->config_len) {
 346                 ret = -EINVAL;
 347                 break;
 348             }
 349         }
 350         len = MIN(ccw.count, vdev->config_len);
 351         if (!ccw.cda) {
 352             ret = -EFAULT;
 353         } else {
 354             virtio_bus_get_vdev_config(&dev->bus, vdev->config);
 355             /* XXX config space endianness */
 356             cpu_physical_memory_write(ccw.cda, vdev->config, len);
 357             sch->curr_status.scsw.count = ccw.count - len;
 358             ret = 0;
 359         }
 360         break;
 361     case CCW_CMD_WRITE_CONF:
 362         if (check_len) {
 363             if (ccw.count > vdev->config_len) {
 364                 ret = -EINVAL;
 365                 break;
 366             }
 367         }
 368         len = MIN(ccw.count, vdev->config_len);
 369         hw_len = len;
 370         if (!ccw.cda) {
 371             ret = -EFAULT;
 372         } else {
 373             config = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
 374             if (!config) {
 375                 ret = -EFAULT;
 376             } else {
 377                 len = hw_len;
 378                 /* XXX config space endianness */
 379                 memcpy(vdev->config, config, len);
 380                 cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
 381                 virtio_bus_set_vdev_config(&dev->bus, vdev->config);
 382                 sch->curr_status.scsw.count = ccw.count - len;
 383                 ret = 0;
 384             }
 385         }
 386         break;
 387     case CCW_CMD_WRITE_STATUS:
 388         if (check_len) {
 389             if (ccw.count != sizeof(status)) {
 390                 ret = -EINVAL;
 391                 break;
 392             }
 393         } else if (ccw.count < sizeof(status)) {
 394             /* Can't execute command. */
 395             ret = -EINVAL;
 396             break;
 397         }
 398         if (!ccw.cda) {
 399             ret = -EFAULT;
 400         } else {
 401             status = ldub_phys(ccw.cda);
 402             if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
 403                 virtio_ccw_stop_ioeventfd(dev);
 404             }
 405             virtio_set_status(vdev, status);
 406             if (vdev->status == 0) {
 407                 virtio_reset(vdev);
 408             }
 409             if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
 410                 virtio_ccw_start_ioeventfd(dev);
 411             }
 412             sch->curr_status.scsw.count = ccw.count - sizeof(status);
 413             ret = 0;
 414         }
 415         break;
 416     case CCW_CMD_SET_IND:
 417         if (check_len) {
 418             if (ccw.count != sizeof(indicators)) {
 419                 ret = -EINVAL;
 420                 break;
 421             }
 422         } else if (ccw.count < sizeof(indicators)) {
 423             /* Can't execute command. */
 424             ret = -EINVAL;
 425             break;
 426         }
 427         if (!ccw.cda) {
 428             ret = -EFAULT;
 429         } else {
 430             indicators = ldq_phys(ccw.cda);
 431             dev->indicators = indicators;
 432             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 433             ret = 0;
 434         }
 435         break;
 436     case CCW_CMD_SET_CONF_IND:
 437         if (check_len) {
 438             if (ccw.count != sizeof(indicators)) {
 439                 ret = -EINVAL;
 440                 break;
 441             }
 442         } else if (ccw.count < sizeof(indicators)) {
 443             /* Can't execute command. */
 444             ret = -EINVAL;
 445             break;
 446         }
 447         if (!ccw.cda) {
 448             ret = -EFAULT;
 449         } else {
 450             indicators = ldq_phys(ccw.cda);
 451             dev->indicators2 = indicators;
 452             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 453             ret = 0;
 454         }
 455         break;
 456     case CCW_CMD_READ_VQ_CONF:
 457         if (check_len) {
 458             if (ccw.count != sizeof(vq_config)) {
 459                 ret = -EINVAL;
 460                 break;
 461             }
 462         } else if (ccw.count < sizeof(vq_config)) {
 463             /* Can't execute command. */
 464             ret = -EINVAL;
 465             break;
 466         }
 467         if (!ccw.cda) {
 468             ret = -EFAULT;
 469         } else {
 470             vq_config.index = lduw_phys(ccw.cda);
 471             vq_config.num_max = virtio_queue_get_num(vdev,
 472                                                      vq_config.index);
 473             stw_phys(ccw.cda + sizeof(vq_config.index), vq_config.num_max);
 474             sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
 475             ret = 0;
 476         }
 477         break;
 478     default:
 479         ret = -ENOSYS;
 480         break;
 481     }
 482     return ret;
 483 }
 484
 485 static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev)
 486 {
 487     unsigned int cssid = 0;
 488     unsigned int ssid = 0;
 489     unsigned int schid;
 490     unsigned int devno;
 491     bool have_devno = false;
 492     bool found = false;
 493     SubchDev *sch;
 494     int ret;
 495     int num;
 496     DeviceState *parent = DEVICE(dev);
 497
 498     sch = g_malloc0(sizeof(SubchDev));
 499
 500     sch->driver_data = dev;
 501     dev->sch = sch;
 502
 503     dev->indicators = 0;
 504
 505     /* Initialize subchannel structure. */
 506     sch->channel_prog = 0x0;
 507     sch->last_cmd_valid = false;
 508     sch->orb = NULL;
 509     /*
 510      * Use a device number if provided. Otherwise, fall back to subchannel
 511      * number.
 512      */
 513     if (dev->bus_id) {
 514         num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno);
 515         if (num == 3) {
 516             if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
 517                 ret = -EINVAL;
 518                 error_report("Invalid cssid or ssid: cssid %x, ssid %x",
 519                              cssid, ssid);
 520                 goto out_err;
 521             }
 522             /* Enforce use of virtual cssid. */
 523             if (cssid != VIRTUAL_CSSID) {
 524                 ret = -EINVAL;
 525                 error_report("cssid %x not valid for virtio devices", cssid);
 526                 goto out_err;
 527             }
 528             if (css_devno_used(cssid, ssid, devno)) {
 529                 ret = -EEXIST;
 530                 error_report("Device %x.%x.%04x already exists", cssid, ssid,
 531                              devno);
 532                 goto out_err;
 533             }
 534             sch->cssid = cssid;
 535             sch->ssid = ssid;
 536             sch->devno = devno;
 537             have_devno = true;
 538         } else {
 539             ret = -EINVAL;
 540             error_report("Malformed devno parameter '%s'", dev->bus_id);
 541             goto out_err;
 542         }
 543     }
 544
 545     /* Find the next free id. */
 546     if (have_devno) {
 547         for (schid = 0; schid <= MAX_SCHID; schid++) {
 548             if (!css_find_subch(1, cssid, ssid, schid)) {
 549                 sch->schid = schid;
 550                 css_subch_assign(cssid, ssid, schid, devno, sch);
 551                 found = true;
 552                 break;
 553             }
 554         }
 555         if (!found) {
 556             ret = -ENODEV;
 557             error_report("No free subchannel found for %x.%x.%04x", cssid, ssid,
 558                          devno);
 559             goto out_err;
 560         }
 561         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 562                                     "user-configured");
 563     } else {
 564         cssid = VIRTUAL_CSSID;
 565         for (ssid = 0; ssid <= MAX_SSID; ssid++) {
 566             for (schid = 0; schid <= MAX_SCHID; schid++) {
 567                 if (!css_find_subch(1, cssid, ssid, schid)) {
 568                     sch->cssid = cssid;
 569                     sch->ssid = ssid;
 570                     sch->schid = schid;
 571                     devno = schid;
 572                     /*
 573                      * If the devno is already taken, look further in this
 574                      * subchannel set.
 575                      */
 576                     while (css_devno_used(cssid, ssid, devno)) {
 577                         if (devno == MAX_SCHID) {
 578                             devno = 0;
 579                         } else if (devno == schid - 1) {
 580                             ret = -ENODEV;
 581                             error_report("No free devno found");
 582                             goto out_err;
 583                         } else {
 584                             devno++;
 585                         }
 586                     }
 587                     sch->devno = devno;
 588                     css_subch_assign(cssid, ssid, schid, devno, sch);
 589                     found = true;
 590                     break;
 591                 }
 592             }
 593             if (found) {
 594                 break;
 595             }
 596         }
 597         if (!found) {
 598             ret = -ENODEV;
 599             error_report("Virtual channel subsystem is full!");
 600             goto out_err;
 601         }
 602         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 603                                     "auto-configured");
 604     }
 605
 606     /* Build initial schib. */
 607     css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
 608
 609     sch->ccw_cb = virtio_ccw_cb;
 610
 611     /* Build senseid data. */
 612     memset(&sch->id, 0, sizeof(SenseId));
 613     sch->id.reserved = 0xff;
 614     sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
 615     sch->id.cu_model = vdev->device_id;
 616
 617     /* Only the first 32 feature bits are used. */
 618     dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus,
 619                                                          dev->host_features[0]);
 620
 621     dev->host_features[0] |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 622     dev->host_features[0] |= 0x1 << VIRTIO_F_BAD_FEATURE;
 623
 624     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
 625                           parent->hotplugged, 1);
 626     return 0;
 627
 628 out_err:
 629     dev->sch = NULL;
 630     g_free(sch);
 631     return ret;
 632 }
 633
 634 static int virtio_ccw_exit(VirtioCcwDevice *dev)
 635 {
 636     SubchDev *sch = dev->sch;
 637
 638     if (sch) {
 639         css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 640         g_free(sch);
 641     }
 642     dev->indicators = 0;
 643     return 0;
 644 }
 645
 646 static int virtio_ccw_net_init(VirtioCcwDevice *ccw_dev)
 647 {
 648     DeviceState *qdev = DEVICE(ccw_dev);
 649     VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev);
 650     DeviceState *vdev = DEVICE(&dev->vdev);
 651
 652     virtio_net_set_config_size(&dev->vdev, ccw_dev->host_features[0]);
 653     virtio_net_set_netclient_name(&dev->vdev, qdev->id,
 654                                   object_get_typename(OBJECT(qdev)));
 655     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 656     if (qdev_init(vdev) < 0) {
 657         return -1;
 658     }
 659
 660     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 661 }
 662
 663 static void virtio_ccw_net_instance_init(Object *obj)
 664 {
 665     VirtIONetCcw *dev = VIRTIO_NET_CCW(obj);
 666     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET);
 667     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 668 }
 669
 670 static int virtio_ccw_blk_init(VirtioCcwDevice *ccw_dev)
 671 {
 672     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev);
 673     DeviceState *vdev = DEVICE(&dev->vdev);
 674     virtio_blk_set_conf(vdev, &(dev->blk));
 675     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 676     if (qdev_init(vdev) < 0) {
 677         return -1;
 678     }
 679
 680     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 681 }
 682
 683 static void virtio_ccw_blk_instance_init(Object *obj)
 684 {
 685     VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj);
 686     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK);
 687     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 688 }
 689
 690 static int virtio_ccw_serial_init(VirtioCcwDevice *ccw_dev)
 691 {
 692     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev);
 693     DeviceState *vdev = DEVICE(&dev->vdev);
 694     DeviceState *proxy = DEVICE(ccw_dev);
 695     char *bus_name;
 696
 697     /*
 698      * For command line compatibility, this sets the virtio-serial-device bus
 699      * name as before.
 700      */
 701     if (proxy->id) {
 702         bus_name = g_strdup_printf("%s.0", proxy->id);
 703         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
 704         g_free(bus_name);
 705     }
 706
 707     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 708     if (qdev_init(vdev) < 0) {
 709         return -1;
 710     }
 711
 712     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 713 }
 714
 715
 716 static void virtio_ccw_serial_instance_init(Object *obj)
 717 {
 718     VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj);
 719     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL);
 720     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 721 }
 722
 723 static int virtio_ccw_balloon_init(VirtioCcwDevice *ccw_dev)
 724 {
 725     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev);
 726     DeviceState *vdev = DEVICE(&dev->vdev);
 727
 728     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 729     if (qdev_init(vdev) < 0) {
 730         return -1;
 731     }
 732
 733     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 734 }
 735
 736 static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v,
 737                                       void *opaque, const char *name,
 738                                       Error **errp)
 739 {
 740     VirtIOBalloonCcw *dev = opaque;
 741     object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp);
 742 }
 743
 744 static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v,
 745                                                 void *opaque, const char *name,
 746                                                 Error **errp)
 747 {
 748     VirtIOBalloonCcw *dev = opaque;
 749     object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
 750                         errp);
 751 }
 752
 753 static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v,
 754                                                 void *opaque, const char *name,
 755                                                 Error **errp)
 756 {
 757     VirtIOBalloonCcw *dev = opaque;
 758     object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
 759                         errp);
 760 }
 761
 762 static void virtio_ccw_balloon_instance_init(Object *obj)
 763 {
 764     VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj);
 765     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON);
 766     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 767
 768     object_property_add(obj, "guest-stats", "guest statistics",
 769                         balloon_ccw_stats_get_all, NULL, NULL, dev, NULL);
 770
 771     object_property_add(obj, "guest-stats-polling-interval", "int",
 772                         balloon_ccw_stats_get_poll_interval,
 773                         balloon_ccw_stats_set_poll_interval,
 774                         NULL, dev, NULL);
 775 }
 776
 777 static int virtio_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
 778 {
 779     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev);
 780     DeviceState *vdev = DEVICE(&dev->vdev);
 781     DeviceState *qdev = DEVICE(ccw_dev);
 782     char *bus_name;
 783
 784     /*
 785      * For command line compatibility, this sets the virtio-scsi-device bus
 786      * name as before.
 787      */
 788     if (qdev->id) {
 789         bus_name = g_strdup_printf("%s.0", qdev->id);
 790         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
 791         g_free(bus_name);
 792     }
 793
 794     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 795     if (qdev_init(vdev) < 0) {
 796         return -1;
 797     }
 798
 799     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 800 }
 801
 802 static void virtio_ccw_scsi_instance_init(Object *obj)
 803 {
 804     VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj);
 805     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI);
 806     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 807 }
 808
 809 #ifdef CONFIG_VHOST_SCSI
 810 static int vhost_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
 811 {
 812     VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
 813     DeviceState *vdev = DEVICE(&dev->vdev);
 814
 815     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 816     if (qdev_init(vdev) < 0) {
 817         return -1;
 818     }
 819
 820     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 821 }
 822
 823 static void vhost_ccw_scsi_instance_init(Object *obj)
 824 {
 825     VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
 826     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI);
 827     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 828 }
 829 #endif
 830
 831 static int virtio_ccw_rng_init(VirtioCcwDevice *ccw_dev)
 832 {
 833     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
 834     DeviceState *vdev = DEVICE(&dev->vdev);
 835
 836     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
 837     if (qdev_init(vdev) < 0) {
 838         return -1;
 839     }
 840
 841     object_property_set_link(OBJECT(dev),
 842                              OBJECT(dev->vdev.conf.rng), "rng",
 843                              NULL);
 844
 845     return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
 846 }
 847
 848 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
 849  * be careful and test performance if you change this.
 850  */
 851 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
 852 {
 853     return container_of(d, VirtioCcwDevice, parent_obj);
 854 }
 855
 856 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
 857 {
 858     VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
 859     SubchDev *sch = dev->sch;
 860     uint64_t indicators;
 861
 862     if (vector >= 128) {
 863         return;
 864     }
 865
 866     if (vector < VIRTIO_PCI_QUEUE_MAX) {
 867         if (!dev->indicators) {
 868             return;
 869         }
 870         indicators = ldq_phys(dev->indicators);
 871         indicators |= 1ULL << vector;
 872         stq_phys(dev->indicators, indicators);
 873     } else {
 874         if (!dev->indicators2) {
 875             return;
 876         }
 877         vector = 0;
 878         indicators = ldq_phys(dev->indicators2);
 879         indicators |= 1ULL << vector;
 880         stq_phys(dev->indicators2, indicators);
 881     }
 882
 883     css_conditional_io_interrupt(sch);
 884
 885 }
 886
 887 static unsigned virtio_ccw_get_features(DeviceState *d)
 888 {
 889     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 890
 891     /* Only the first 32 feature bits are used. */
 892     return dev->host_features[0];
 893 }
 894
 895 static void virtio_ccw_reset(DeviceState *d)
 896 {
 897     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 898     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 899
 900     virtio_ccw_stop_ioeventfd(dev);
 901     virtio_reset(vdev);
 902     css_reset_sch(dev->sch);
 903     dev->indicators = 0;
 904     dev->indicators2 = 0;
 905 }
 906
 907 static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
 908 {
 909     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 910
 911     if (running) {
 912         virtio_ccw_start_ioeventfd(dev);
 913     } else {
 914         virtio_ccw_stop_ioeventfd(dev);
 915     }
 916 }
 917
 918 static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
 919 {
 920     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 921
 922     return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
 923 }
 924
 925 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
 926 {
 927     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 928
 929     /* Stop using the generic ioeventfd, we are doing eventfd handling
 930      * ourselves below */
 931     dev->ioeventfd_disabled = assign;
 932     if (assign) {
 933         virtio_ccw_stop_ioeventfd(dev);
 934     }
 935     return virtio_ccw_set_guest2host_notifier(dev, n, assign, false);
 936 }
 937
 938 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
 939                                          bool assign, bool with_irqfd)
 940 {
 941     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 942     VirtQueue *vq = virtio_get_queue(vdev, n);
 943     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 944     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
 945
 946     if (assign) {
 947         int r = event_notifier_init(notifier, 0);
 948
 949         if (r < 0) {
 950             return r;
 951         }
 952         virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
 953         /* We do not support irqfd for classic I/O interrupts, because the
 954          * classic interrupts are intermixed with the subchannel status, that
 955          * is queried with test subchannel. We want to use vhost, though.
 956          * Lets make sure to have vhost running and wire up the irq fd to
 957          * land in qemu (and only the irq fd) in this code.
 958          */
 959         if (k->guest_notifier_mask) {
 960             k->guest_notifier_mask(vdev, n, false);
 961         }
 962         /* get lost events and re-inject */
 963         if (k->guest_notifier_pending &&
 964             k->guest_notifier_pending(vdev, n)) {
 965             event_notifier_set(notifier);
 966         }
 967     } else {
 968         if (k->guest_notifier_mask) {
 969             k->guest_notifier_mask(vdev, n, true);
 970         }
 971         virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
 972         event_notifier_cleanup(notifier);
 973     }
 974     return 0;
 975 }
 976
 977 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
 978                                           bool assigned)
 979 {
 980     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 981     VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
 982     int r, n;
 983
 984     for (n = 0; n < nvqs; n++) {
 985         if (!virtio_queue_get_num(vdev, n)) {
 986             break;
 987         }
 988         /* false -> true, as soon as irqfd works */
 989         r = virtio_ccw_set_guest_notifier(dev, n, assigned, false);
 990         if (r < 0) {
 991             goto assign_error;
 992         }
 993     }
 994     return 0;
 995
 996 assign_error:
 997     while (--n >= 0) {
 998         virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
 999     }
1000     return r;
1001 }
1002
1003 /**************** Virtio-ccw Bus Device Descriptions *******************/
1004
1005 static Property virtio_ccw_net_properties[] = {
1006     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1007     DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]),
1008     DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetCcw, vdev.net_conf),
1009     DEFINE_NIC_PROPERTIES(VirtIONetCcw, vdev.nic_conf),
1010     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1011                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1012     DEFINE_PROP_END_OF_LIST(),
1013 };
1014
1015 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
1016 {
1017     DeviceClass *dc = DEVICE_CLASS(klass);
1018     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1019
1020     k->init = virtio_ccw_net_init;
1021     k->exit = virtio_ccw_exit;
1022     dc->reset = virtio_ccw_reset;
1023     dc->props = virtio_ccw_net_properties;
1024 }
1025
1026 static const TypeInfo virtio_ccw_net = {
1027     .name          = TYPE_VIRTIO_NET_CCW,
1028     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1029     .instance_size = sizeof(VirtIONetCcw),
1030     .instance_init = virtio_ccw_net_instance_init,
1031     .class_init    = virtio_ccw_net_class_init,
1032 };
1033
1034 static Property virtio_ccw_blk_properties[] = {
1035     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1036     DEFINE_VIRTIO_BLK_FEATURES(VirtioCcwDevice, host_features[0]),
1037     DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkCcw, blk),
1038     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1039                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1040 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
1041     DEFINE_PROP_BIT("x-data-plane", VirtIOBlkCcw, blk.data_plane, 0, false),
1042 #endif
1043     DEFINE_PROP_END_OF_LIST(),
1044 };
1045
1046 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
1047 {
1048     DeviceClass *dc = DEVICE_CLASS(klass);
1049     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1050
1051     k->init = virtio_ccw_blk_init;
1052     k->exit = virtio_ccw_exit;
1053     dc->reset = virtio_ccw_reset;
1054     dc->props = virtio_ccw_blk_properties;
1055 }
1056
1057 static const TypeInfo virtio_ccw_blk = {
1058     .name          = TYPE_VIRTIO_BLK_CCW,
1059     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1060     .instance_size = sizeof(VirtIOBlkCcw),
1061     .instance_init = virtio_ccw_blk_instance_init,
1062     .class_init    = virtio_ccw_blk_class_init,
1063 };
1064
1065 static Property virtio_ccw_serial_properties[] = {
1066     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1067     DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtioSerialCcw, vdev.serial),
1068     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1069     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1070                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1071     DEFINE_PROP_END_OF_LIST(),
1072 };
1073
1074 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
1075 {
1076     DeviceClass *dc = DEVICE_CLASS(klass);
1077     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1078
1079     k->init = virtio_ccw_serial_init;
1080     k->exit = virtio_ccw_exit;
1081     dc->reset = virtio_ccw_reset;
1082     dc->props = virtio_ccw_serial_properties;
1083 }
1084
1085 static const TypeInfo virtio_ccw_serial = {
1086     .name          = TYPE_VIRTIO_SERIAL_CCW,
1087     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1088     .instance_size = sizeof(VirtioSerialCcw),
1089     .instance_init = virtio_ccw_serial_instance_init,
1090     .class_init    = virtio_ccw_serial_class_init,
1091 };
1092
1093 static Property virtio_ccw_balloon_properties[] = {
1094     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1095     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1096     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1097                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1098     DEFINE_PROP_END_OF_LIST(),
1099 };
1100
1101 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
1102 {
1103     DeviceClass *dc = DEVICE_CLASS(klass);
1104     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1105
1106     k->init = virtio_ccw_balloon_init;
1107     k->exit = virtio_ccw_exit;
1108     dc->reset = virtio_ccw_reset;
1109     dc->props = virtio_ccw_balloon_properties;
1110 }
1111
1112 static const TypeInfo virtio_ccw_balloon = {
1113     .name          = TYPE_VIRTIO_BALLOON_CCW,
1114     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1115     .instance_size = sizeof(VirtIOBalloonCcw),
1116     .instance_init = virtio_ccw_balloon_instance_init,
1117     .class_init    = virtio_ccw_balloon_class_init,
1118 };
1119
1120 static Property virtio_ccw_scsi_properties[] = {
1121     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1122     DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
1123     DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]),
1124     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1125                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1126     DEFINE_PROP_END_OF_LIST(),
1127 };
1128
1129 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
1130 {
1131     DeviceClass *dc = DEVICE_CLASS(klass);
1132     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1133
1134     k->init = virtio_ccw_scsi_init;
1135     k->exit = virtio_ccw_exit;
1136     dc->reset = virtio_ccw_reset;
1137     dc->props = virtio_ccw_scsi_properties;
1138 }
1139
1140 static const TypeInfo virtio_ccw_scsi = {
1141     .name          = TYPE_VIRTIO_SCSI_CCW,
1142     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1143     .instance_size = sizeof(VirtIOSCSICcw),
1144     .instance_init = virtio_ccw_scsi_instance_init,
1145     .class_init    = virtio_ccw_scsi_class_init,
1146 };
1147
1148 #ifdef CONFIG_VHOST_SCSI
1149 static Property vhost_ccw_scsi_properties[] = {
1150     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1151     DEFINE_VHOST_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
1152     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1153     DEFINE_PROP_END_OF_LIST(),
1154 };
1155
1156 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
1157 {
1158     DeviceClass *dc = DEVICE_CLASS(klass);
1159     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1160
1161     k->init = vhost_ccw_scsi_init;
1162     k->exit = virtio_ccw_exit;
1163     dc->reset = virtio_ccw_reset;
1164     dc->props = vhost_ccw_scsi_properties;
1165 }
1166
1167 static const TypeInfo vhost_ccw_scsi = {
1168     .name          = TYPE_VHOST_SCSI_CCW,
1169     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1170     .instance_size = sizeof(VirtIOSCSICcw),
1171     .instance_init = vhost_ccw_scsi_instance_init,
1172     .class_init    = vhost_ccw_scsi_class_init,
1173 };
1174 #endif
1175
1176 static void virtio_ccw_rng_instance_init(Object *obj)
1177 {
1178     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
1179     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG);
1180     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1181     object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
1182                              (Object **)&dev->vdev.conf.rng, NULL);
1183 }
1184
1185 static Property virtio_ccw_rng_properties[] = {
1186     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1187     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
1188     DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORNGCcw, vdev.conf),
1189     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1190                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1191     DEFINE_PROP_END_OF_LIST(),
1192 };
1193
1194 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
1195 {
1196     DeviceClass *dc = DEVICE_CLASS(klass);
1197     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1198
1199     k->init = virtio_ccw_rng_init;
1200     k->exit = virtio_ccw_exit;
1201     dc->reset = virtio_ccw_reset;
1202     dc->props = virtio_ccw_rng_properties;
1203 }
1204
1205 static const TypeInfo virtio_ccw_rng = {
1206     .name          = TYPE_VIRTIO_RNG_CCW,
1207     .parent        = TYPE_VIRTIO_CCW_DEVICE,
1208     .instance_size = sizeof(VirtIORNGCcw),
1209     .instance_init = virtio_ccw_rng_instance_init,
1210     .class_init    = virtio_ccw_rng_class_init,
1211 };
1212
1213 static int virtio_ccw_busdev_init(DeviceState *dev)
1214 {
1215     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1216     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1217
1218     virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1219
1220     return _info->init(_dev);
1221 }
1222
1223 static int virtio_ccw_busdev_exit(DeviceState *dev)
1224 {
1225     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1226     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1227
1228     return _info->exit(_dev);
1229 }
1230
1231 static int virtio_ccw_busdev_unplug(DeviceState *dev)
1232 {
1233     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1234     SubchDev *sch = _dev->sch;
1235
1236     virtio_ccw_stop_ioeventfd(_dev);
1237
1238     /*
1239      * We should arrive here only for device_del, since we don't support
1240      * direct hot(un)plug of channels, but only through virtio.
1241      */
1242     assert(sch != NULL);
1243     /* Subchannel is now disabled and no longer valid. */
1244     sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
1245                                      PMCW_FLAGS_MASK_DNV);
1246
1247     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
1248
1249     object_unparent(OBJECT(dev));
1250     return 0;
1251 }
1252
1253 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1254 {
1255     DeviceClass *dc = DEVICE_CLASS(klass);
1256
1257     dc->init = virtio_ccw_busdev_init;
1258     dc->exit = virtio_ccw_busdev_exit;
1259     dc->unplug = virtio_ccw_busdev_unplug;
1260     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1261
1262 }
1263
1264 static const TypeInfo virtio_ccw_device_info = {
1265     .name = TYPE_VIRTIO_CCW_DEVICE,
1266     .parent = TYPE_DEVICE,
1267     .instance_size = sizeof(VirtioCcwDevice),
1268     .class_init = virtio_ccw_device_class_init,
1269     .class_size = sizeof(VirtIOCCWDeviceClass),
1270     .abstract = true,
1271 };
1272
1273 /***************** Virtual-css Bus Bridge Device ********************/
1274 /* Only required to have the virtio bus as child in the system bus */
1275
1276 static int virtual_css_bridge_init(SysBusDevice *dev)
1277 {
1278     /* nothing */
1279     return 0;
1280 }
1281
1282 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
1283 {
1284     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1285
1286     k->init = virtual_css_bridge_init;
1287 }
1288
1289 static const TypeInfo virtual_css_bridge_info = {
1290     .name          = "virtual-css-bridge",
1291     .parent        = TYPE_SYS_BUS_DEVICE,
1292     .instance_size = sizeof(SysBusDevice),
1293     .class_init    = virtual_css_bridge_class_init,
1294 };
1295
1296 /* virtio-ccw-bus */
1297
1298 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1299                                VirtioCcwDevice *dev)
1300 {
1301     DeviceState *qdev = DEVICE(dev);
1302     BusState *qbus;
1303     char virtio_bus_name[] = "virtio-bus";
1304
1305     qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1306                         qdev, virtio_bus_name);
1307     qbus = BUS(bus);
1308     qbus->allow_hotplug = 1;
1309 }
1310
1311 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1312 {
1313     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1314     BusClass *bus_class = BUS_CLASS(klass);
1315
1316     bus_class->max_dev = 1;
1317     k->notify = virtio_ccw_notify;
1318     k->get_features = virtio_ccw_get_features;
1319     k->vmstate_change = virtio_ccw_vmstate_change;
1320     k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1321     k->set_host_notifier = virtio_ccw_set_host_notifier;
1322     k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1323 }
1324
1325 static const TypeInfo virtio_ccw_bus_info = {
1326     .name = TYPE_VIRTIO_CCW_BUS,
1327     .parent = TYPE_VIRTIO_BUS,
1328     .instance_size = sizeof(VirtioCcwBusState),
1329     .class_init = virtio_ccw_bus_class_init,
1330 };
1331
1332 static void virtio_ccw_register(void)
1333 {
1334     type_register_static(&virtio_ccw_bus_info);
1335     type_register_static(&virtual_css_bus_info);
1336     type_register_static(&virtio_ccw_device_info);
1337     type_register_static(&virtio_ccw_serial);
1338     type_register_static(&virtio_ccw_blk);
1339     type_register_static(&virtio_ccw_net);
1340     type_register_static(&virtio_ccw_balloon);
1341     type_register_static(&virtio_ccw_scsi);
1342 #ifdef CONFIG_VHOST_SCSI
1343     type_register_static(&vhost_ccw_scsi);
1344 #endif
1345     type_register_static(&virtio_ccw_rng);
1346     type_register_static(&virtual_css_bridge_info);
1347 }
1348
1349 type_init(virtio_ccw_register)