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