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.h"
  19 #include "hw/virtio-serial.h"
  20 #include "hw/virtio-net.h"
  21 #include "hw/sysbus.h"
  22 #include "qemu/bitops.h"
  23 #include "hw/virtio-bus.h"
  24
  25 #include "ioinst.h"
  26 #include "css.h"
  27 #include "virtio-ccw.h"
  28 #include "trace.h"
  29
  30 static int virtual_css_bus_reset(BusState *qbus)
  31 {
  32     /* This should actually be modelled via the generic css */
  33     css_reset();
  34
  35     /* we dont traverse ourself, return 0 */
  36     return 0;
  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 static const VirtIOBindings virtio_ccw_bindings;
  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                 if (dev->vdev->set_features) {
 237                     dev->vdev->set_features(dev->vdev, features.features);
 238                 }
 239                 dev->vdev->guest_features = features.features;
 240             } else {
 241                 /*
 242                  * If the guest supports more feature bits, assert that it
 243                  * passes us zeroes for those we don't support.
 244                  */
 245                 if (features.features) {
 246                     fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n",
 247                             features.index, features.features);
 248                     /* XXX: do a unit check here? */
 249                 }
 250             }
 251             sch->curr_status.scsw.count = ccw.count - sizeof(features);
 252             ret = 0;
 253         }
 254         break;
 255     case CCW_CMD_READ_CONF:
 256         if (check_len) {
 257             if (ccw.count > dev->vdev->config_len) {
 258                 ret = -EINVAL;
 259                 break;
 260             }
 261         }
 262         len = MIN(ccw.count, dev->vdev->config_len);
 263         if (!ccw.cda) {
 264             ret = -EFAULT;
 265         } else {
 266             dev->vdev->get_config(dev->vdev, dev->vdev->config);
 267             /* XXX config space endianness */
 268             cpu_physical_memory_write(ccw.cda, dev->vdev->config, len);
 269             sch->curr_status.scsw.count = ccw.count - len;
 270             ret = 0;
 271         }
 272         break;
 273     case CCW_CMD_WRITE_CONF:
 274         if (check_len) {
 275             if (ccw.count > dev->vdev->config_len) {
 276                 ret = -EINVAL;
 277                 break;
 278             }
 279         }
 280         len = MIN(ccw.count, dev->vdev->config_len);
 281         hw_len = len;
 282         if (!ccw.cda) {
 283             ret = -EFAULT;
 284         } else {
 285             config = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
 286             if (!config) {
 287                 ret = -EFAULT;
 288             } else {
 289                 len = hw_len;
 290                 /* XXX config space endianness */
 291                 memcpy(dev->vdev->config, config, len);
 292                 cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
 293                 if (dev->vdev->set_config) {
 294                     dev->vdev->set_config(dev->vdev, dev->vdev->config);
 295                 }
 296                 sch->curr_status.scsw.count = ccw.count - len;
 297                 ret = 0;
 298             }
 299         }
 300         break;
 301     case CCW_CMD_WRITE_STATUS:
 302         if (check_len) {
 303             if (ccw.count != sizeof(status)) {
 304                 ret = -EINVAL;
 305                 break;
 306             }
 307         } else if (ccw.count < sizeof(status)) {
 308             /* Can't execute command. */
 309             ret = -EINVAL;
 310             break;
 311         }
 312         if (!ccw.cda) {
 313             ret = -EFAULT;
 314         } else {
 315             status = ldub_phys(ccw.cda);
 316             virtio_set_status(dev->vdev, status);
 317             if (dev->vdev->status == 0) {
 318                 virtio_reset(dev->vdev);
 319             }
 320             sch->curr_status.scsw.count = ccw.count - sizeof(status);
 321             ret = 0;
 322         }
 323         break;
 324     case CCW_CMD_SET_IND:
 325         if (check_len) {
 326             if (ccw.count != sizeof(indicators)) {
 327                 ret = -EINVAL;
 328                 break;
 329             }
 330         } else if (ccw.count < sizeof(indicators)) {
 331             /* Can't execute command. */
 332             ret = -EINVAL;
 333             break;
 334         }
 335         indicators = ldq_phys(ccw.cda);
 336         if (!indicators) {
 337             ret = -EFAULT;
 338         } else {
 339             dev->indicators = indicators;
 340             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 341             ret = 0;
 342         }
 343         break;
 344     case CCW_CMD_SET_CONF_IND:
 345         if (check_len) {
 346             if (ccw.count != sizeof(indicators)) {
 347                 ret = -EINVAL;
 348                 break;
 349             }
 350         } else if (ccw.count < sizeof(indicators)) {
 351             /* Can't execute command. */
 352             ret = -EINVAL;
 353             break;
 354         }
 355         indicators = ldq_phys(ccw.cda);
 356         if (!indicators) {
 357             ret = -EFAULT;
 358         } else {
 359             dev->indicators2 = indicators;
 360             sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
 361             ret = 0;
 362         }
 363         break;
 364     case CCW_CMD_READ_VQ_CONF:
 365         if (check_len) {
 366             if (ccw.count != sizeof(vq_config)) {
 367                 ret = -EINVAL;
 368                 break;
 369             }
 370         } else if (ccw.count < sizeof(vq_config)) {
 371             /* Can't execute command. */
 372             ret = -EINVAL;
 373             break;
 374         }
 375         if (!ccw.cda) {
 376             ret = -EFAULT;
 377         } else {
 378             vq_config.index = lduw_phys(ccw.cda);
 379             vq_config.num_max = virtio_queue_get_num(dev->vdev,
 380                                                      vq_config.index);
 381             stw_phys(ccw.cda + sizeof(vq_config.index), vq_config.num_max);
 382             sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
 383             ret = 0;
 384         }
 385         break;
 386     default:
 387         ret = -ENOSYS;
 388         break;
 389     }
 390     return ret;
 391 }
 392
 393 static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev)
 394 {
 395     unsigned int cssid = 0;
 396     unsigned int ssid = 0;
 397     unsigned int schid;
 398     unsigned int devno;
 399     bool have_devno = false;
 400     bool found = false;
 401     SubchDev *sch;
 402     int ret;
 403     int num;
 404     DeviceState *parent = DEVICE(dev);
 405
 406     sch = g_malloc0(sizeof(SubchDev));
 407
 408     sch->driver_data = dev;
 409     dev->sch = sch;
 410
 411     dev->vdev = vdev;
 412     dev->indicators = 0;
 413
 414     /* Initialize subchannel structure. */
 415     sch->channel_prog = 0x0;
 416     sch->last_cmd_valid = false;
 417     sch->orb = NULL;
 418     /*
 419      * Use a device number if provided. Otherwise, fall back to subchannel
 420      * number.
 421      */
 422     if (dev->bus_id) {
 423         num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno);
 424         if (num == 3) {
 425             if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
 426                 ret = -EINVAL;
 427                 error_report("Invalid cssid or ssid: cssid %x, ssid %x",
 428                              cssid, ssid);
 429                 goto out_err;
 430             }
 431             /* Enforce use of virtual cssid. */
 432             if (cssid != VIRTUAL_CSSID) {
 433                 ret = -EINVAL;
 434                 error_report("cssid %x not valid for virtio devices", cssid);
 435                 goto out_err;
 436             }
 437             if (css_devno_used(cssid, ssid, devno)) {
 438                 ret = -EEXIST;
 439                 error_report("Device %x.%x.%04x already exists", cssid, ssid,
 440                              devno);
 441                 goto out_err;
 442             }
 443             sch->cssid = cssid;
 444             sch->ssid = ssid;
 445             sch->devno = devno;
 446             have_devno = true;
 447         } else {
 448             ret = -EINVAL;
 449             error_report("Malformed devno parameter '%s'", dev->bus_id);
 450             goto out_err;
 451         }
 452     }
 453
 454     /* Find the next free id. */
 455     if (have_devno) {
 456         for (schid = 0; schid <= MAX_SCHID; schid++) {
 457             if (!css_find_subch(1, cssid, ssid, schid)) {
 458                 sch->schid = schid;
 459                 css_subch_assign(cssid, ssid, schid, devno, sch);
 460                 found = true;
 461                 break;
 462             }
 463         }
 464         if (!found) {
 465             ret = -ENODEV;
 466             error_report("No free subchannel found for %x.%x.%04x", cssid, ssid,
 467                          devno);
 468             goto out_err;
 469         }
 470         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 471                                     "user-configured");
 472     } else {
 473         cssid = VIRTUAL_CSSID;
 474         for (ssid = 0; ssid <= MAX_SSID; ssid++) {
 475             for (schid = 0; schid <= MAX_SCHID; schid++) {
 476                 if (!css_find_subch(1, cssid, ssid, schid)) {
 477                     sch->cssid = cssid;
 478                     sch->ssid = ssid;
 479                     sch->schid = schid;
 480                     devno = schid;
 481                     /*
 482                      * If the devno is already taken, look further in this
 483                      * subchannel set.
 484                      */
 485                     while (css_devno_used(cssid, ssid, devno)) {
 486                         if (devno == MAX_SCHID) {
 487                             devno = 0;
 488                         } else if (devno == schid - 1) {
 489                             ret = -ENODEV;
 490                             error_report("No free devno found");
 491                             goto out_err;
 492                         } else {
 493                             devno++;
 494                         }
 495                     }
 496                     sch->devno = devno;
 497                     css_subch_assign(cssid, ssid, schid, devno, sch);
 498                     found = true;
 499                     break;
 500                 }
 501             }
 502             if (found) {
 503                 break;
 504             }
 505         }
 506         if (!found) {
 507             ret = -ENODEV;
 508             error_report("Virtual channel subsystem is full!");
 509             goto out_err;
 510         }
 511         trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
 512                                     "auto-configured");
 513     }
 514
 515     /* Build initial schib. */
 516     css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
 517
 518     sch->ccw_cb = virtio_ccw_cb;
 519
 520     /* Build senseid data. */
 521     memset(&sch->id, 0, sizeof(SenseId));
 522     sch->id.reserved = 0xff;
 523     sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
 524     sch->id.cu_model = dev->vdev->device_id;
 525
 526     virtio_bind_device(vdev, &virtio_ccw_bindings, DEVICE(dev));
 527     /* Only the first 32 feature bits are used. */
 528     dev->host_features[0] = vdev->get_features(vdev, dev->host_features[0]);
 529     dev->host_features[0] |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 530     dev->host_features[0] |= 0x1 << VIRTIO_F_BAD_FEATURE;
 531
 532     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
 533                           parent->hotplugged, 1);
 534     return 0;
 535
 536 out_err:
 537     dev->sch = NULL;
 538     g_free(sch);
 539     return ret;
 540 }
 541
 542 static int virtio_ccw_exit(VirtioCcwDevice *dev)
 543 {
 544     SubchDev *sch = dev->sch;
 545
 546     if (sch) {
 547         css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
 548         g_free(sch);
 549     }
 550     dev->indicators = 0;
 551     return 0;
 552 }
 553
 554 static int virtio_ccw_net_init(VirtioCcwDevice *dev)
 555 {
 556     VirtIODevice *vdev;
 557
 558     vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net,
 559                            dev->host_features[0]);
 560     if (!vdev) {
 561         return -1;
 562     }
 563
 564     return virtio_ccw_device_init(dev, vdev);
 565 }
 566
 567 static int virtio_ccw_net_exit(VirtioCcwDevice *dev)
 568 {
 569     virtio_net_exit(dev->vdev);
 570     return virtio_ccw_exit(dev);
 571 }
 572
 573 static int virtio_ccw_blk_init(VirtioCcwDevice *dev)
 574 {
 575     VirtIODevice *vdev;
 576
 577     vdev = virtio_blk_init((DeviceState *)dev, &dev->blk);
 578     if (!vdev) {
 579         return -1;
 580     }
 581
 582     return virtio_ccw_device_init(dev, vdev);
 583 }
 584
 585 static int virtio_ccw_blk_exit(VirtioCcwDevice *dev)
 586 {
 587     virtio_blk_exit(dev->vdev);
 588     return virtio_ccw_exit(dev);
 589 }
 590
 591 static int virtio_ccw_serial_init(VirtioCcwDevice *dev)
 592 {
 593     VirtIODevice *vdev;
 594
 595     vdev = virtio_serial_init((DeviceState *)dev, &dev->serial);
 596     if (!vdev) {
 597         return -1;
 598     }
 599
 600     return virtio_ccw_device_init(dev, vdev);
 601 }
 602
 603 static int virtio_ccw_serial_exit(VirtioCcwDevice *dev)
 604 {
 605     virtio_serial_exit(dev->vdev);
 606     return virtio_ccw_exit(dev);
 607 }
 608
 609 static int virtio_ccw_balloon_init(VirtioCcwDevice *dev)
 610 {
 611     VirtIODevice *vdev;
 612
 613     vdev = virtio_balloon_init((DeviceState *)dev);
 614     if (!vdev) {
 615         return -1;
 616     }
 617
 618     return virtio_ccw_device_init(dev, vdev);
 619 }
 620
 621 static int virtio_ccw_balloon_exit(VirtioCcwDevice *dev)
 622 {
 623     virtio_balloon_exit(dev->vdev);
 624     return virtio_ccw_exit(dev);
 625 }
 626
 627 static int virtio_ccw_scsi_init(VirtioCcwDevice *dev)
 628 {
 629     VirtIODevice *vdev;
 630
 631     vdev = virtio_scsi_init((DeviceState *)dev, &dev->scsi);
 632     if (!vdev) {
 633         return -1;
 634     }
 635
 636     return virtio_ccw_device_init(dev, vdev);
 637 }
 638
 639 static int virtio_ccw_scsi_exit(VirtioCcwDevice *dev)
 640 {
 641     virtio_scsi_exit(dev->vdev);
 642     return virtio_ccw_exit(dev);
 643 }
 644
 645 static int virtio_ccw_rng_init(VirtioCcwDevice *dev)
 646 {
 647     VirtIODevice *vdev;
 648
 649     if (dev->rng.rng == NULL) {
 650         dev->rng.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM));
 651         object_property_add_child(OBJECT(dev), "default-backend",
 652                                   OBJECT(dev->rng.default_backend), NULL);
 653         object_property_set_link(OBJECT(dev), OBJECT(dev->rng.default_backend),
 654                                  "rng", NULL);
 655     }
 656     vdev = virtio_rng_init((DeviceState *)dev, &dev->rng);
 657     if (!vdev) {
 658         return -1;
 659     }
 660     return virtio_ccw_device_init(dev, vdev);
 661 }
 662
 663 static int virtio_ccw_rng_exit(VirtioCcwDevice *dev)
 664 {
 665     virtio_rng_exit(dev->vdev);
 666     return virtio_ccw_exit(dev);
 667 }
 668
 669 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
 670  * be careful and test performance if you change this.
 671  */
 672 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
 673 {
 674     return container_of(d, VirtioCcwDevice, parent_obj);
 675 }
 676
 677 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
 678 {
 679     VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
 680     SubchDev *sch = dev->sch;
 681     uint64_t indicators;
 682
 683     if (vector >= 128) {
 684         return;
 685     }
 686
 687     if (vector < VIRTIO_PCI_QUEUE_MAX) {
 688         indicators = ldq_phys(dev->indicators);
 689         indicators |= 1ULL << vector;
 690         stq_phys(dev->indicators, indicators);
 691     } else {
 692         vector = 0;
 693         indicators = ldq_phys(dev->indicators2);
 694         indicators |= 1ULL << vector;
 695         stq_phys(dev->indicators2, indicators);
 696     }
 697
 698     css_conditional_io_interrupt(sch);
 699
 700 }
 701
 702 static unsigned virtio_ccw_get_features(DeviceState *d)
 703 {
 704     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 705
 706     /* Only the first 32 feature bits are used. */
 707     return dev->host_features[0];
 708 }
 709
 710 static void virtio_ccw_reset(DeviceState *d)
 711 {
 712     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
 713
 714     virtio_reset(dev->vdev);
 715     css_reset_sch(dev->sch);
 716 }
 717
 718 /**************** Virtio-ccw Bus Device Descriptions *******************/
 719
 720 static const VirtIOBindings virtio_ccw_bindings = {
 721     .notify = virtio_ccw_notify,
 722     .get_features = virtio_ccw_get_features,
 723 };
 724
 725 static Property virtio_ccw_net_properties[] = {
 726     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
 727     DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]),
 728     DEFINE_NIC_PROPERTIES(VirtioCcwDevice, nic),
 729     DEFINE_PROP_UINT32("x-txtimer", VirtioCcwDevice,
 730                        net.txtimer, TX_TIMER_INTERVAL),
 731     DEFINE_PROP_INT32("x-txburst", VirtioCcwDevice,
 732                       net.txburst, TX_BURST),
 733     DEFINE_PROP_STRING("tx", VirtioCcwDevice, net.tx),
 734     DEFINE_PROP_END_OF_LIST(),
 735 };
 736
 737 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
 738 {
 739     DeviceClass *dc = DEVICE_CLASS(klass);
 740     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
 741
 742     k->init = virtio_ccw_net_init;
 743     k->exit = virtio_ccw_net_exit;
 744     dc->reset = virtio_ccw_reset;
 745     dc->props = virtio_ccw_net_properties;
 746 }
 747
 748 static const TypeInfo virtio_ccw_net = {
 749     .name          = "virtio-net-ccw",
 750     .parent        = TYPE_VIRTIO_CCW_DEVICE,
 751     .instance_size = sizeof(VirtioCcwDevice),
 752     .class_init    = virtio_ccw_net_class_init,
 753 };
 754
 755 static Property virtio_ccw_blk_properties[] = {
 756     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
 757     DEFINE_BLOCK_PROPERTIES(VirtioCcwDevice, blk.conf),
 758     DEFINE_PROP_STRING("serial", VirtioCcwDevice, blk.serial),
 759 #ifdef __linux__
 760     DEFINE_PROP_BIT("scsi", VirtioCcwDevice, blk.scsi, 0, true),
 761 #endif
 762     DEFINE_VIRTIO_BLK_FEATURES(VirtioCcwDevice, host_features[0]),
 763     DEFINE_PROP_END_OF_LIST(),
 764 };
 765
 766 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
 767 {
 768     DeviceClass *dc = DEVICE_CLASS(klass);
 769     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
 770
 771     k->init = virtio_ccw_blk_init;
 772     k->exit = virtio_ccw_blk_exit;
 773     dc->reset = virtio_ccw_reset;
 774     dc->props = virtio_ccw_blk_properties;
 775 }
 776
 777 static const TypeInfo virtio_ccw_blk = {
 778     .name          = "virtio-blk-ccw",
 779     .parent        = TYPE_VIRTIO_CCW_DEVICE,
 780     .instance_size = sizeof(VirtioCcwDevice),
 781     .class_init    = virtio_ccw_blk_class_init,
 782 };
 783
 784 static Property virtio_ccw_serial_properties[] = {
 785     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
 786     DEFINE_PROP_UINT32("max_ports", VirtioCcwDevice,
 787                        serial.max_virtserial_ports, 31),
 788     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
 789     DEFINE_PROP_END_OF_LIST(),
 790 };
 791
 792 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
 793 {
 794     DeviceClass *dc = DEVICE_CLASS(klass);
 795     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
 796
 797     k->init = virtio_ccw_serial_init;
 798     k->exit = virtio_ccw_serial_exit;
 799     dc->reset = virtio_ccw_reset;
 800     dc->props = virtio_ccw_serial_properties;
 801 }
 802
 803 static const TypeInfo virtio_ccw_serial = {
 804     .name          = "virtio-serial-ccw",
 805     .parent        = TYPE_VIRTIO_CCW_DEVICE,
 806     .instance_size = sizeof(VirtioCcwDevice),
 807     .class_init    = virtio_ccw_serial_class_init,
 808 };
 809
 810 static Property virtio_ccw_balloon_properties[] = {
 811     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
 812     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
 813     DEFINE_PROP_END_OF_LIST(),
 814 };
 815
 816 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
 817 {
 818     DeviceClass *dc = DEVICE_CLASS(klass);
 819     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
 820
 821     k->init = virtio_ccw_balloon_init;
 822     k->exit = virtio_ccw_balloon_exit;
 823     dc->reset = virtio_ccw_reset;
 824     dc->props = virtio_ccw_balloon_properties;
 825 }
 826
 827 static const TypeInfo virtio_ccw_balloon = {
 828     .name          = "virtio-balloon-ccw",
 829     .parent        = TYPE_VIRTIO_CCW_DEVICE,
 830     .instance_size = sizeof(VirtioCcwDevice),
 831     .class_init    = virtio_ccw_balloon_class_init,
 832 };
 833
 834 static Property virtio_ccw_scsi_properties[] = {
 835     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
 836     DEFINE_VIRTIO_SCSI_PROPERTIES(VirtioCcwDevice, host_features[0], scsi),
 837     DEFINE_PROP_END_OF_LIST(),
 838 };
 839
 840 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
 841 {
 842     DeviceClass *dc = DEVICE_CLASS(klass);
 843     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
 844
 845     k->init = virtio_ccw_scsi_init;
 846     k->exit = virtio_ccw_scsi_exit;
 847     dc->reset = virtio_ccw_reset;
 848     dc->props = virtio_ccw_scsi_properties;
 849 }
 850
 851 static const TypeInfo virtio_ccw_scsi = {
 852     .name          = "virtio-scsi-ccw",
 853     .parent        = TYPE_VIRTIO_CCW_DEVICE,
 854     .instance_size = sizeof(VirtioCcwDevice),
 855     .class_init    = virtio_ccw_scsi_class_init,
 856 };
 857
 858 static void virtio_ccw_rng_initfn(Object *obj)
 859 {
 860     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(obj);
 861
 862     object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
 863                              (Object **)&dev->rng.rng, NULL);
 864 }
 865
 866 static Property virtio_ccw_rng_properties[] = {
 867     DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
 868     DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
 869     DEFINE_PROP_UINT64("max-bytes", VirtioCcwDevice, rng.max_bytes, INT64_MAX),
 870     DEFINE_PROP_UINT32("period", VirtioCcwDevice, rng.period_ms, 1 << 16),
 871     DEFINE_PROP_END_OF_LIST(),
 872 };
 873
 874 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
 875 {
 876     DeviceClass *dc = DEVICE_CLASS(klass);
 877     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
 878
 879     k->init = virtio_ccw_rng_init;
 880     k->exit = virtio_ccw_rng_exit;
 881     dc->reset = virtio_ccw_reset;
 882     dc->props = virtio_ccw_rng_properties;
 883 }
 884
 885 static const TypeInfo virtio_ccw_rng = {
 886     .name          = "virtio-rng-ccw",
 887     .parent        = TYPE_VIRTIO_CCW_DEVICE,
 888     .instance_size = sizeof(VirtioCcwDevice),
 889     .instance_init = virtio_ccw_rng_initfn,
 890     .class_init    = virtio_ccw_rng_class_init,
 891 };
 892
 893 static int virtio_ccw_busdev_init(DeviceState *dev)
 894 {
 895     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
 896     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 897
 898     virtio_ccw_bus_new(&_dev->bus, _dev);
 899
 900     return _info->init(_dev);
 901 }
 902
 903 static int virtio_ccw_busdev_exit(DeviceState *dev)
 904 {
 905     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
 906     VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 907
 908     return _info->exit(_dev);
 909 }
 910
 911 static int virtio_ccw_busdev_unplug(DeviceState *dev)
 912 {
 913     VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
 914     SubchDev *sch = _dev->sch;
 915
 916     /*
 917      * We should arrive here only for device_del, since we don't support
 918      * direct hot(un)plug of channels, but only through virtio.
 919      */
 920     assert(sch != NULL);
 921     /* Subchannel is now disabled and no longer valid. */
 922     sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
 923                                      PMCW_FLAGS_MASK_DNV);
 924
 925     css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
 926
 927     qdev_free(dev);
 928     return 0;
 929 }
 930
 931 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
 932 {
 933     DeviceClass *dc = DEVICE_CLASS(klass);
 934
 935     dc->init = virtio_ccw_busdev_init;
 936     dc->exit = virtio_ccw_busdev_exit;
 937     dc->unplug = virtio_ccw_busdev_unplug;
 938     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
 939
 940 }
 941
 942 static const TypeInfo virtio_ccw_device_info = {
 943     .name = TYPE_VIRTIO_CCW_DEVICE,
 944     .parent = TYPE_DEVICE,
 945     .instance_size = sizeof(VirtioCcwDevice),
 946     .class_init = virtio_ccw_device_class_init,
 947     .class_size = sizeof(VirtIOCCWDeviceClass),
 948     .abstract = true,
 949 };
 950
 951 /***************** Virtual-css Bus Bridge Device ********************/
 952 /* Only required to have the virtio bus as child in the system bus */
 953
 954 static int virtual_css_bridge_init(SysBusDevice *dev)
 955 {
 956     /* nothing */
 957     return 0;
 958 }
 959
 960 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
 961 {
 962     DeviceClass *dc = DEVICE_CLASS(klass);
 963     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 964
 965     k->init = virtual_css_bridge_init;
 966     dc->no_user = 1;
 967 }
 968
 969 static const TypeInfo virtual_css_bridge_info = {
 970     .name          = "virtual-css-bridge",
 971     .parent        = TYPE_SYS_BUS_DEVICE,
 972     .instance_size = sizeof(SysBusDevice),
 973     .class_init    = virtual_css_bridge_class_init,
 974 };
 975
 976 /* virtio-ccw-bus */
 977
 978 void virtio_ccw_bus_new(VirtioBusState *bus, VirtioCcwDevice *dev)
 979 {
 980     DeviceState *qdev = DEVICE(dev);
 981     BusState *qbus;
 982
 983     qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_CCW_BUS, qdev, NULL);
 984     qbus = BUS(bus);
 985     qbus->allow_hotplug = 1;
 986 }
 987
 988 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
 989 {
 990     VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
 991     BusClass *bus_class = BUS_CLASS(klass);
 992
 993     bus_class->max_dev = 1;
 994     k->notify = virtio_ccw_notify;
 995     k->get_features = virtio_ccw_get_features;
 996 }
 997
 998 static const TypeInfo virtio_ccw_bus_info = {
 999     .name = TYPE_VIRTIO_CCW_BUS,
1000     .parent = TYPE_VIRTIO_BUS,
1001     .instance_size = sizeof(VirtioCcwBusState),
1002     .class_init = virtio_ccw_bus_class_init,
1003 };
1004
1005 static void virtio_ccw_register(void)
1006 {
1007     type_register_static(&virtio_ccw_bus_info);
1008     type_register_static(&virtual_css_bus_info);
1009     type_register_static(&virtio_ccw_device_info);
1010     type_register_static(&virtio_ccw_serial);
1011     type_register_static(&virtio_ccw_blk);
1012     type_register_static(&virtio_ccw_net);
1013     type_register_static(&virtio_ccw_balloon);
1014     type_register_static(&virtio_ccw_scsi);
1015     type_register_static(&virtio_ccw_rng);
1016     type_register_static(&virtual_css_bridge_info);
1017 }
1018
1019 type_init(virtio_ccw_register)