1 /* 2 * virtio ccw target implementation 3 * 4 * Copyright 2012,2014 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 "sysemu/block-backend.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 #include "hw/s390x/adapter.h" 25 #include "hw/s390x/s390_flic.h" 26 27 #include "ioinst.h" 28 #include "css.h" 29 #include "virtio-ccw.h" 30 #include "trace.h" 31 32 static QTAILQ_HEAD(, IndAddr) indicator_addresses = 33 QTAILQ_HEAD_INITIALIZER(indicator_addresses); 34 35 static IndAddr *get_indicator(hwaddr ind_addr, int len) 36 { 37 IndAddr *indicator; 38 39 QTAILQ_FOREACH(indicator, &indicator_addresses, sibling) { 40 if (indicator->addr == ind_addr) { 41 indicator->refcnt++; 42 return indicator; 43 } 44 } 45 indicator = g_new0(IndAddr, 1); 46 indicator->addr = ind_addr; 47 indicator->len = len; 48 indicator->refcnt = 1; 49 QTAILQ_INSERT_TAIL(&indicator_addresses, indicator, sibling); 50 return indicator; 51 } 52 53 static int s390_io_adapter_map(AdapterInfo *adapter, uint64_t map_addr, 54 bool do_map) 55 { 56 S390FLICState *fs = s390_get_flic(); 57 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 58 59 return fsc->io_adapter_map(fs, adapter->adapter_id, map_addr, do_map); 60 } 61 62 static void release_indicator(AdapterInfo *adapter, IndAddr *indicator) 63 { 64 assert(indicator->refcnt > 0); 65 indicator->refcnt--; 66 if (indicator->refcnt > 0) { 67 return; 68 } 69 QTAILQ_REMOVE(&indicator_addresses, indicator, sibling); 70 if (indicator->map) { 71 s390_io_adapter_map(adapter, indicator->map, false); 72 } 73 g_free(indicator); 74 } 75 76 static int map_indicator(AdapterInfo *adapter, IndAddr *indicator) 77 { 78 int ret; 79 80 if (indicator->map) { 81 return 0; /* already mapped is not an error */ 82 } 83 indicator->map = indicator->addr; 84 ret = s390_io_adapter_map(adapter, indicator->map, true); 85 if ((ret != 0) && (ret != -ENOSYS)) { 86 goto out_err; 87 } 88 return 0; 89 90 out_err: 91 indicator->map = 0; 92 return ret; 93 } 94 95 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 96 VirtioCcwDevice *dev); 97 98 static void virtual_css_bus_reset(BusState *qbus) 99 { 100 /* This should actually be modelled via the generic css */ 101 css_reset(); 102 } 103 104 105 static void virtual_css_bus_class_init(ObjectClass *klass, void *data) 106 { 107 BusClass *k = BUS_CLASS(klass); 108 109 k->reset = virtual_css_bus_reset; 110 } 111 112 static const TypeInfo virtual_css_bus_info = { 113 .name = TYPE_VIRTUAL_CSS_BUS, 114 .parent = TYPE_BUS, 115 .instance_size = sizeof(VirtualCssBus), 116 .class_init = virtual_css_bus_class_init, 117 }; 118 119 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch) 120 { 121 VirtIODevice *vdev = NULL; 122 VirtioCcwDevice *dev = sch->driver_data; 123 124 if (dev) { 125 vdev = virtio_bus_get_device(&dev->bus); 126 } 127 return vdev; 128 } 129 130 static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n, 131 bool assign, bool set_handler) 132 { 133 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 134 VirtQueue *vq = virtio_get_queue(vdev, n); 135 EventNotifier *notifier = virtio_queue_get_host_notifier(vq); 136 int r = 0; 137 SubchDev *sch = dev->sch; 138 uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid; 139 140 if (assign) { 141 r = event_notifier_init(notifier, 1); 142 if (r < 0) { 143 error_report("%s: unable to init event notifier: %d", __func__, r); 144 return r; 145 } 146 virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler); 147 r = s390_assign_subch_ioeventfd(notifier, sch_id, n, assign); 148 if (r < 0) { 149 error_report("%s: unable to assign ioeventfd: %d", __func__, r); 150 virtio_queue_set_host_notifier_fd_handler(vq, false, false); 151 event_notifier_cleanup(notifier); 152 return r; 153 } 154 } else { 155 virtio_queue_set_host_notifier_fd_handler(vq, false, false); 156 s390_assign_subch_ioeventfd(notifier, sch_id, n, assign); 157 event_notifier_cleanup(notifier); 158 } 159 return r; 160 } 161 162 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev) 163 { 164 VirtIODevice *vdev; 165 int n, r; 166 167 if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) || 168 dev->ioeventfd_disabled || 169 dev->ioeventfd_started) { 170 return; 171 } 172 vdev = virtio_bus_get_device(&dev->bus); 173 for (n = 0; n < VIRTIO_CCW_QUEUE_MAX; n++) { 174 if (!virtio_queue_get_num(vdev, n)) { 175 continue; 176 } 177 r = virtio_ccw_set_guest2host_notifier(dev, n, true, true); 178 if (r < 0) { 179 goto assign_error; 180 } 181 } 182 dev->ioeventfd_started = true; 183 return; 184 185 assign_error: 186 while (--n >= 0) { 187 if (!virtio_queue_get_num(vdev, n)) { 188 continue; 189 } 190 r = virtio_ccw_set_guest2host_notifier(dev, n, false, false); 191 assert(r >= 0); 192 } 193 dev->ioeventfd_started = false; 194 /* Disable ioeventfd for this device. */ 195 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; 196 error_report("%s: failed. Fallback to userspace (slower).", __func__); 197 } 198 199 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev) 200 { 201 VirtIODevice *vdev; 202 int n, r; 203 204 if (!dev->ioeventfd_started) { 205 return; 206 } 207 vdev = virtio_bus_get_device(&dev->bus); 208 for (n = 0; n < VIRTIO_CCW_QUEUE_MAX; n++) { 209 if (!virtio_queue_get_num(vdev, n)) { 210 continue; 211 } 212 r = virtio_ccw_set_guest2host_notifier(dev, n, false, false); 213 assert(r >= 0); 214 } 215 dev->ioeventfd_started = false; 216 } 217 218 VirtualCssBus *virtual_css_bus_init(void) 219 { 220 VirtualCssBus *cbus; 221 BusState *bus; 222 DeviceState *dev; 223 224 /* Create bridge device */ 225 dev = qdev_create(NULL, "virtual-css-bridge"); 226 qdev_init_nofail(dev); 227 228 /* Create bus on bridge device */ 229 bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css"); 230 cbus = VIRTUAL_CSS_BUS(bus); 231 232 /* Enable hotplugging */ 233 qbus_set_hotplug_handler(bus, dev, &error_abort); 234 235 return cbus; 236 } 237 238 /* Communication blocks used by several channel commands. */ 239 typedef struct VqInfoBlock { 240 uint64_t queue; 241 uint32_t align; 242 uint16_t index; 243 uint16_t num; 244 } QEMU_PACKED VqInfoBlock; 245 246 typedef struct VqConfigBlock { 247 uint16_t index; 248 uint16_t num_max; 249 } QEMU_PACKED VqConfigBlock; 250 251 typedef struct VirtioFeatDesc { 252 uint32_t features; 253 uint8_t index; 254 } QEMU_PACKED VirtioFeatDesc; 255 256 typedef struct VirtioThinintInfo { 257 hwaddr summary_indicator; 258 hwaddr device_indicator; 259 uint64_t ind_bit; 260 uint8_t isc; 261 } QEMU_PACKED VirtioThinintInfo; 262 263 /* Specify where the virtqueues for the subchannel are in guest memory. */ 264 static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align, 265 uint16_t index, uint16_t num) 266 { 267 VirtIODevice *vdev = virtio_ccw_get_vdev(sch); 268 269 if (index >= VIRTIO_CCW_QUEUE_MAX) { 270 return -EINVAL; 271 } 272 273 /* Current code in virtio.c relies on 4K alignment. */ 274 if (addr && (align != 4096)) { 275 return -EINVAL; 276 } 277 278 if (!vdev) { 279 return -EINVAL; 280 } 281 282 virtio_queue_set_addr(vdev, index, addr); 283 if (!addr) { 284 virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR); 285 } else { 286 /* Fail if we don't have a big enough queue. */ 287 /* TODO: Add interface to handle vring.num changing */ 288 if (virtio_queue_get_num(vdev, index) > num) { 289 return -EINVAL; 290 } 291 virtio_queue_set_vector(vdev, index, index); 292 } 293 /* tell notify handler in case of config change */ 294 vdev->config_vector = VIRTIO_CCW_QUEUE_MAX; 295 return 0; 296 } 297 298 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) 299 { 300 int ret; 301 VqInfoBlock info; 302 uint8_t status; 303 VirtioFeatDesc features; 304 void *config; 305 hwaddr indicators; 306 VqConfigBlock vq_config; 307 VirtioCcwDevice *dev = sch->driver_data; 308 VirtIODevice *vdev = virtio_ccw_get_vdev(sch); 309 bool check_len; 310 int len; 311 hwaddr hw_len; 312 VirtioThinintInfo *thinint; 313 314 if (!dev) { 315 return -EINVAL; 316 } 317 318 trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid, 319 ccw.cmd_code); 320 check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC)); 321 322 /* Look at the command. */ 323 switch (ccw.cmd_code) { 324 case CCW_CMD_SET_VQ: 325 if (check_len) { 326 if (ccw.count != sizeof(info)) { 327 ret = -EINVAL; 328 break; 329 } 330 } else if (ccw.count < sizeof(info)) { 331 /* Can't execute command. */ 332 ret = -EINVAL; 333 break; 334 } 335 if (!ccw.cda) { 336 ret = -EFAULT; 337 } else { 338 info.queue = address_space_ldq(&address_space_memory, ccw.cda, 339 MEMTXATTRS_UNSPECIFIED, NULL); 340 info.align = address_space_ldl(&address_space_memory, 341 ccw.cda + sizeof(info.queue), 342 MEMTXATTRS_UNSPECIFIED, 343 NULL); 344 info.index = address_space_lduw(&address_space_memory, 345 ccw.cda + sizeof(info.queue) 346 + sizeof(info.align), 347 MEMTXATTRS_UNSPECIFIED, 348 NULL); 349 info.num = address_space_lduw(&address_space_memory, 350 ccw.cda + sizeof(info.queue) 351 + sizeof(info.align) 352 + sizeof(info.index), 353 MEMTXATTRS_UNSPECIFIED, 354 NULL); 355 ret = virtio_ccw_set_vqs(sch, info.queue, info.align, info.index, 356 info.num); 357 sch->curr_status.scsw.count = 0; 358 } 359 break; 360 case CCW_CMD_VDEV_RESET: 361 virtio_ccw_stop_ioeventfd(dev); 362 virtio_reset(vdev); 363 ret = 0; 364 break; 365 case CCW_CMD_READ_FEAT: 366 if (check_len) { 367 if (ccw.count != sizeof(features)) { 368 ret = -EINVAL; 369 break; 370 } 371 } else if (ccw.count < sizeof(features)) { 372 /* Can't execute command. */ 373 ret = -EINVAL; 374 break; 375 } 376 if (!ccw.cda) { 377 ret = -EFAULT; 378 } else { 379 features.index = address_space_ldub(&address_space_memory, 380 ccw.cda 381 + sizeof(features.features), 382 MEMTXATTRS_UNSPECIFIED, 383 NULL); 384 if (features.index == 0) { 385 features.features = vdev->host_features; 386 } else { 387 /* Return zeroes if the guest supports more feature bits. */ 388 features.features = 0; 389 } 390 address_space_stl_le(&address_space_memory, ccw.cda, 391 features.features, MEMTXATTRS_UNSPECIFIED, 392 NULL); 393 sch->curr_status.scsw.count = ccw.count - sizeof(features); 394 ret = 0; 395 } 396 break; 397 case CCW_CMD_WRITE_FEAT: 398 if (check_len) { 399 if (ccw.count != sizeof(features)) { 400 ret = -EINVAL; 401 break; 402 } 403 } else if (ccw.count < sizeof(features)) { 404 /* Can't execute command. */ 405 ret = -EINVAL; 406 break; 407 } 408 if (!ccw.cda) { 409 ret = -EFAULT; 410 } else { 411 features.index = address_space_ldub(&address_space_memory, 412 ccw.cda 413 + sizeof(features.features), 414 MEMTXATTRS_UNSPECIFIED, 415 NULL); 416 features.features = address_space_ldl_le(&address_space_memory, 417 ccw.cda, 418 MEMTXATTRS_UNSPECIFIED, 419 NULL); 420 if (features.index == 0) { 421 virtio_set_features(vdev, features.features); 422 } else { 423 /* 424 * If the guest supports more feature bits, assert that it 425 * passes us zeroes for those we don't support. 426 */ 427 if (features.features) { 428 fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n", 429 features.index, features.features); 430 /* XXX: do a unit check here? */ 431 } 432 } 433 sch->curr_status.scsw.count = ccw.count - sizeof(features); 434 ret = 0; 435 } 436 break; 437 case CCW_CMD_READ_CONF: 438 if (check_len) { 439 if (ccw.count > vdev->config_len) { 440 ret = -EINVAL; 441 break; 442 } 443 } 444 len = MIN(ccw.count, vdev->config_len); 445 if (!ccw.cda) { 446 ret = -EFAULT; 447 } else { 448 virtio_bus_get_vdev_config(&dev->bus, vdev->config); 449 /* XXX config space endianness */ 450 cpu_physical_memory_write(ccw.cda, vdev->config, len); 451 sch->curr_status.scsw.count = ccw.count - len; 452 ret = 0; 453 } 454 break; 455 case CCW_CMD_WRITE_CONF: 456 if (check_len) { 457 if (ccw.count > vdev->config_len) { 458 ret = -EINVAL; 459 break; 460 } 461 } 462 len = MIN(ccw.count, vdev->config_len); 463 hw_len = len; 464 if (!ccw.cda) { 465 ret = -EFAULT; 466 } else { 467 config = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 468 if (!config) { 469 ret = -EFAULT; 470 } else { 471 len = hw_len; 472 /* XXX config space endianness */ 473 memcpy(vdev->config, config, len); 474 cpu_physical_memory_unmap(config, hw_len, 0, hw_len); 475 virtio_bus_set_vdev_config(&dev->bus, vdev->config); 476 sch->curr_status.scsw.count = ccw.count - len; 477 ret = 0; 478 } 479 } 480 break; 481 case CCW_CMD_WRITE_STATUS: 482 if (check_len) { 483 if (ccw.count != sizeof(status)) { 484 ret = -EINVAL; 485 break; 486 } 487 } else if (ccw.count < sizeof(status)) { 488 /* Can't execute command. */ 489 ret = -EINVAL; 490 break; 491 } 492 if (!ccw.cda) { 493 ret = -EFAULT; 494 } else { 495 status = address_space_ldub(&address_space_memory, ccw.cda, 496 MEMTXATTRS_UNSPECIFIED, NULL); 497 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 498 virtio_ccw_stop_ioeventfd(dev); 499 } 500 virtio_set_status(vdev, status); 501 if (vdev->status == 0) { 502 virtio_reset(vdev); 503 } 504 if (status & VIRTIO_CONFIG_S_DRIVER_OK) { 505 virtio_ccw_start_ioeventfd(dev); 506 } 507 sch->curr_status.scsw.count = ccw.count - sizeof(status); 508 ret = 0; 509 } 510 break; 511 case CCW_CMD_SET_IND: 512 if (check_len) { 513 if (ccw.count != sizeof(indicators)) { 514 ret = -EINVAL; 515 break; 516 } 517 } else if (ccw.count < sizeof(indicators)) { 518 /* Can't execute command. */ 519 ret = -EINVAL; 520 break; 521 } 522 if (sch->thinint_active) { 523 /* Trigger a command reject. */ 524 ret = -ENOSYS; 525 break; 526 } 527 if (!ccw.cda) { 528 ret = -EFAULT; 529 } else { 530 indicators = address_space_ldq_be(&address_space_memory, ccw.cda, 531 MEMTXATTRS_UNSPECIFIED, NULL); 532 dev->indicators = get_indicator(indicators, sizeof(uint64_t)); 533 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 534 ret = 0; 535 } 536 break; 537 case CCW_CMD_SET_CONF_IND: 538 if (check_len) { 539 if (ccw.count != sizeof(indicators)) { 540 ret = -EINVAL; 541 break; 542 } 543 } else if (ccw.count < sizeof(indicators)) { 544 /* Can't execute command. */ 545 ret = -EINVAL; 546 break; 547 } 548 if (!ccw.cda) { 549 ret = -EFAULT; 550 } else { 551 indicators = address_space_ldq_be(&address_space_memory, ccw.cda, 552 MEMTXATTRS_UNSPECIFIED, NULL); 553 dev->indicators2 = get_indicator(indicators, sizeof(uint64_t)); 554 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 555 ret = 0; 556 } 557 break; 558 case CCW_CMD_READ_VQ_CONF: 559 if (check_len) { 560 if (ccw.count != sizeof(vq_config)) { 561 ret = -EINVAL; 562 break; 563 } 564 } else if (ccw.count < sizeof(vq_config)) { 565 /* Can't execute command. */ 566 ret = -EINVAL; 567 break; 568 } 569 if (!ccw.cda) { 570 ret = -EFAULT; 571 } else { 572 vq_config.index = address_space_lduw_be(&address_space_memory, 573 ccw.cda, 574 MEMTXATTRS_UNSPECIFIED, 575 NULL); 576 if (vq_config.index >= VIRTIO_CCW_QUEUE_MAX) { 577 ret = -EINVAL; 578 break; 579 } 580 vq_config.num_max = virtio_queue_get_num(vdev, 581 vq_config.index); 582 address_space_stw_be(&address_space_memory, 583 ccw.cda + sizeof(vq_config.index), 584 vq_config.num_max, 585 MEMTXATTRS_UNSPECIFIED, 586 NULL); 587 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config); 588 ret = 0; 589 } 590 break; 591 case CCW_CMD_SET_IND_ADAPTER: 592 if (check_len) { 593 if (ccw.count != sizeof(*thinint)) { 594 ret = -EINVAL; 595 break; 596 } 597 } else if (ccw.count < sizeof(*thinint)) { 598 /* Can't execute command. */ 599 ret = -EINVAL; 600 break; 601 } 602 len = sizeof(*thinint); 603 hw_len = len; 604 if (!ccw.cda) { 605 ret = -EFAULT; 606 } else if (dev->indicators && !sch->thinint_active) { 607 /* Trigger a command reject. */ 608 ret = -ENOSYS; 609 } else { 610 thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 611 if (!thinint) { 612 ret = -EFAULT; 613 } else { 614 uint64_t ind_bit = ldq_be_p(&thinint->ind_bit); 615 616 len = hw_len; 617 dev->summary_indicator = 618 get_indicator(ldq_be_p(&thinint->summary_indicator), 619 sizeof(uint8_t)); 620 dev->indicators = 621 get_indicator(ldq_be_p(&thinint->device_indicator), 622 ind_bit / 8 + 1); 623 dev->thinint_isc = thinint->isc; 624 dev->routes.adapter.ind_offset = ind_bit; 625 dev->routes.adapter.summary_offset = 7; 626 cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len); 627 ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 628 dev->thinint_isc, true, false, 629 &dev->routes.adapter.adapter_id); 630 assert(ret == 0); 631 sch->thinint_active = ((dev->indicators != NULL) && 632 (dev->summary_indicator != NULL)); 633 sch->curr_status.scsw.count = ccw.count - len; 634 ret = 0; 635 } 636 } 637 break; 638 default: 639 ret = -ENOSYS; 640 break; 641 } 642 return ret; 643 } 644 645 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) 646 { 647 unsigned int cssid = 0; 648 unsigned int ssid = 0; 649 unsigned int schid; 650 unsigned int devno; 651 bool have_devno = false; 652 bool found = false; 653 SubchDev *sch; 654 int num; 655 Error *err = NULL; 656 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 657 658 sch = g_malloc0(sizeof(SubchDev)); 659 660 sch->driver_data = dev; 661 dev->sch = sch; 662 663 dev->indicators = NULL; 664 665 /* Initialize subchannel structure. */ 666 sch->channel_prog = 0x0; 667 sch->last_cmd_valid = false; 668 sch->thinint_active = false; 669 /* 670 * Use a device number if provided. Otherwise, fall back to subchannel 671 * number. 672 */ 673 if (dev->bus_id) { 674 num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno); 675 if (num == 3) { 676 if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) { 677 error_setg(errp, "Invalid cssid or ssid: cssid %x, ssid %x", 678 cssid, ssid); 679 goto out_err; 680 } 681 /* Enforce use of virtual cssid. */ 682 if (cssid != VIRTUAL_CSSID) { 683 error_setg(errp, "cssid %x not valid for virtio devices", 684 cssid); 685 goto out_err; 686 } 687 if (css_devno_used(cssid, ssid, devno)) { 688 error_setg(errp, "Device %x.%x.%04x already exists", 689 cssid, ssid, devno); 690 goto out_err; 691 } 692 sch->cssid = cssid; 693 sch->ssid = ssid; 694 sch->devno = devno; 695 have_devno = true; 696 } else { 697 error_setg(errp, "Malformed devno parameter '%s'", dev->bus_id); 698 goto out_err; 699 } 700 } 701 702 /* Find the next free id. */ 703 if (have_devno) { 704 for (schid = 0; schid <= MAX_SCHID; schid++) { 705 if (!css_find_subch(1, cssid, ssid, schid)) { 706 sch->schid = schid; 707 css_subch_assign(cssid, ssid, schid, devno, sch); 708 found = true; 709 break; 710 } 711 } 712 if (!found) { 713 error_setg(errp, "No free subchannel found for %x.%x.%04x", 714 cssid, ssid, devno); 715 goto out_err; 716 } 717 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 718 "user-configured"); 719 } else { 720 cssid = VIRTUAL_CSSID; 721 for (ssid = 0; ssid <= MAX_SSID; ssid++) { 722 for (schid = 0; schid <= MAX_SCHID; schid++) { 723 if (!css_find_subch(1, cssid, ssid, schid)) { 724 sch->cssid = cssid; 725 sch->ssid = ssid; 726 sch->schid = schid; 727 devno = schid; 728 /* 729 * If the devno is already taken, look further in this 730 * subchannel set. 731 */ 732 while (css_devno_used(cssid, ssid, devno)) { 733 if (devno == MAX_SCHID) { 734 devno = 0; 735 } else if (devno == schid - 1) { 736 error_setg(errp, "No free devno found"); 737 goto out_err; 738 } else { 739 devno++; 740 } 741 } 742 sch->devno = devno; 743 css_subch_assign(cssid, ssid, schid, devno, sch); 744 found = true; 745 break; 746 } 747 } 748 if (found) { 749 break; 750 } 751 } 752 if (!found) { 753 error_setg(errp, "Virtual channel subsystem is full!"); 754 goto out_err; 755 } 756 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 757 "auto-configured"); 758 } 759 760 /* Build initial schib. */ 761 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); 762 763 sch->ccw_cb = virtio_ccw_cb; 764 765 /* Build senseid data. */ 766 memset(&sch->id, 0, sizeof(SenseId)); 767 sch->id.reserved = 0xff; 768 sch->id.cu_type = VIRTIO_CCW_CU_TYPE; 769 770 if (k->realize) { 771 k->realize(dev, &err); 772 } 773 if (err) { 774 error_propagate(errp, err); 775 css_subch_assign(cssid, ssid, schid, devno, NULL); 776 goto out_err; 777 } 778 779 return; 780 781 out_err: 782 dev->sch = NULL; 783 g_free(sch); 784 } 785 786 static int virtio_ccw_exit(VirtioCcwDevice *dev) 787 { 788 SubchDev *sch = dev->sch; 789 790 if (sch) { 791 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 792 g_free(sch); 793 } 794 if (dev->indicators) { 795 release_indicator(&dev->routes.adapter, dev->indicators); 796 dev->indicators = NULL; 797 } 798 return 0; 799 } 800 801 static void virtio_ccw_net_realize(VirtioCcwDevice *ccw_dev, Error **errp) 802 { 803 DeviceState *qdev = DEVICE(ccw_dev); 804 VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev); 805 DeviceState *vdev = DEVICE(&dev->vdev); 806 Error *err = NULL; 807 808 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 809 object_get_typename(OBJECT(qdev))); 810 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 811 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 812 if (err) { 813 error_propagate(errp, err); 814 } 815 } 816 817 static void virtio_ccw_net_instance_init(Object *obj) 818 { 819 VirtIONetCcw *dev = VIRTIO_NET_CCW(obj); 820 821 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 822 TYPE_VIRTIO_NET); 823 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 824 "bootindex", &error_abort); 825 } 826 827 static void virtio_ccw_blk_realize(VirtioCcwDevice *ccw_dev, Error **errp) 828 { 829 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev); 830 DeviceState *vdev = DEVICE(&dev->vdev); 831 Error *err = NULL; 832 833 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 834 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 835 if (err) { 836 error_propagate(errp, err); 837 } 838 } 839 840 static void virtio_ccw_blk_instance_init(Object *obj) 841 { 842 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj); 843 844 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 845 TYPE_VIRTIO_BLK); 846 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread", 847 &error_abort); 848 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 849 "bootindex", &error_abort); 850 } 851 852 static void virtio_ccw_serial_realize(VirtioCcwDevice *ccw_dev, Error **errp) 853 { 854 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev); 855 DeviceState *vdev = DEVICE(&dev->vdev); 856 DeviceState *proxy = DEVICE(ccw_dev); 857 Error *err = NULL; 858 char *bus_name; 859 860 /* 861 * For command line compatibility, this sets the virtio-serial-device bus 862 * name as before. 863 */ 864 if (proxy->id) { 865 bus_name = g_strdup_printf("%s.0", proxy->id); 866 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 867 g_free(bus_name); 868 } 869 870 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 871 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 872 if (err) { 873 error_propagate(errp, err); 874 } 875 } 876 877 878 static void virtio_ccw_serial_instance_init(Object *obj) 879 { 880 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj); 881 882 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 883 TYPE_VIRTIO_SERIAL); 884 } 885 886 static void virtio_ccw_balloon_realize(VirtioCcwDevice *ccw_dev, Error **errp) 887 { 888 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev); 889 DeviceState *vdev = DEVICE(&dev->vdev); 890 Error *err = NULL; 891 892 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 893 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 894 if (err) { 895 error_propagate(errp, err); 896 } 897 } 898 899 static void virtio_ccw_balloon_instance_init(Object *obj) 900 { 901 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj); 902 903 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 904 TYPE_VIRTIO_BALLOON); 905 object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev), 906 "guest-stats", &error_abort); 907 object_property_add_alias(obj, "guest-stats-polling-interval", 908 OBJECT(&dev->vdev), 909 "guest-stats-polling-interval", &error_abort); 910 } 911 912 static void virtio_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) 913 { 914 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev); 915 DeviceState *vdev = DEVICE(&dev->vdev); 916 DeviceState *qdev = DEVICE(ccw_dev); 917 Error *err = NULL; 918 char *bus_name; 919 920 /* 921 * For command line compatibility, this sets the virtio-scsi-device bus 922 * name as before. 923 */ 924 if (qdev->id) { 925 bus_name = g_strdup_printf("%s.0", qdev->id); 926 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 927 g_free(bus_name); 928 } 929 930 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 931 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 932 if (err) { 933 error_propagate(errp, err); 934 } 935 } 936 937 static void virtio_ccw_scsi_instance_init(Object *obj) 938 { 939 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj); 940 941 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 942 TYPE_VIRTIO_SCSI); 943 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread", 944 &error_abort); 945 } 946 947 #ifdef CONFIG_VHOST_SCSI 948 static void vhost_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) 949 { 950 VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev); 951 DeviceState *vdev = DEVICE(&dev->vdev); 952 Error *err = NULL; 953 954 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 955 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 956 if (err) { 957 error_propagate(errp, err); 958 } 959 } 960 961 static void vhost_ccw_scsi_instance_init(Object *obj) 962 { 963 VHostSCSICcw *dev = VHOST_SCSI_CCW(obj); 964 965 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 966 TYPE_VHOST_SCSI); 967 } 968 #endif 969 970 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp) 971 { 972 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev); 973 DeviceState *vdev = DEVICE(&dev->vdev); 974 Error *err = NULL; 975 976 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 977 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 978 if (err) { 979 error_propagate(errp, err); 980 return; 981 } 982 983 object_property_set_link(OBJECT(dev), 984 OBJECT(dev->vdev.conf.rng), "rng", 985 NULL); 986 } 987 988 /* DeviceState to VirtioCcwDevice. Note: used on datapath, 989 * be careful and test performance if you change this. 990 */ 991 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) 992 { 993 return container_of(d, VirtioCcwDevice, parent_obj); 994 } 995 996 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, 997 uint8_t to_be_set) 998 { 999 uint8_t ind_old, ind_new; 1000 hwaddr len = 1; 1001 uint8_t *ind_addr; 1002 1003 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 1004 if (!ind_addr) { 1005 error_report("%s(%x.%x.%04x): unable to access indicator", 1006 __func__, sch->cssid, sch->ssid, sch->schid); 1007 return -1; 1008 } 1009 do { 1010 ind_old = *ind_addr; 1011 ind_new = ind_old | to_be_set; 1012 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 1013 cpu_physical_memory_unmap(ind_addr, len, 1, len); 1014 1015 return ind_old; 1016 } 1017 1018 static void virtio_ccw_notify(DeviceState *d, uint16_t vector) 1019 { 1020 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); 1021 SubchDev *sch = dev->sch; 1022 uint64_t indicators; 1023 1024 if (vector >= 128) { 1025 return; 1026 } 1027 1028 if (vector < VIRTIO_CCW_QUEUE_MAX) { 1029 if (!dev->indicators) { 1030 return; 1031 } 1032 if (sch->thinint_active) { 1033 /* 1034 * In the adapter interrupt case, indicators points to a 1035 * memory area that may be (way) larger than 64 bit and 1036 * ind_bit indicates the start of the indicators in a big 1037 * endian notation. 1038 */ 1039 uint64_t ind_bit = dev->routes.adapter.ind_offset; 1040 1041 virtio_set_ind_atomic(sch, dev->indicators->addr + 1042 (ind_bit + vector) / 8, 1043 0x80 >> ((ind_bit + vector) % 8)); 1044 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr, 1045 0x01)) { 1046 css_adapter_interrupt(dev->thinint_isc); 1047 } 1048 } else { 1049 indicators = address_space_ldq(&address_space_memory, 1050 dev->indicators->addr, 1051 MEMTXATTRS_UNSPECIFIED, 1052 NULL); 1053 indicators |= 1ULL << vector; 1054 address_space_stq(&address_space_memory, dev->indicators->addr, 1055 indicators, MEMTXATTRS_UNSPECIFIED, NULL); 1056 css_conditional_io_interrupt(sch); 1057 } 1058 } else { 1059 if (!dev->indicators2) { 1060 return; 1061 } 1062 vector = 0; 1063 indicators = address_space_ldq(&address_space_memory, 1064 dev->indicators2->addr, 1065 MEMTXATTRS_UNSPECIFIED, 1066 NULL); 1067 indicators |= 1ULL << vector; 1068 address_space_stq(&address_space_memory, dev->indicators2->addr, 1069 indicators, MEMTXATTRS_UNSPECIFIED, NULL); 1070 css_conditional_io_interrupt(sch); 1071 } 1072 } 1073 1074 static void virtio_ccw_reset(DeviceState *d) 1075 { 1076 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1077 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1078 1079 virtio_ccw_stop_ioeventfd(dev); 1080 virtio_reset(vdev); 1081 css_reset_sch(dev->sch); 1082 if (dev->indicators) { 1083 release_indicator(&dev->routes.adapter, dev->indicators); 1084 dev->indicators = NULL; 1085 } 1086 if (dev->indicators2) { 1087 release_indicator(&dev->routes.adapter, dev->indicators2); 1088 dev->indicators2 = NULL; 1089 } 1090 if (dev->summary_indicator) { 1091 release_indicator(&dev->routes.adapter, dev->summary_indicator); 1092 dev->summary_indicator = NULL; 1093 } 1094 } 1095 1096 static void virtio_ccw_vmstate_change(DeviceState *d, bool running) 1097 { 1098 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1099 1100 if (running) { 1101 virtio_ccw_start_ioeventfd(dev); 1102 } else { 1103 virtio_ccw_stop_ioeventfd(dev); 1104 } 1105 } 1106 1107 static bool virtio_ccw_query_guest_notifiers(DeviceState *d) 1108 { 1109 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1110 1111 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA); 1112 } 1113 1114 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign) 1115 { 1116 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1117 1118 /* Stop using the generic ioeventfd, we are doing eventfd handling 1119 * ourselves below */ 1120 dev->ioeventfd_disabled = assign; 1121 if (assign) { 1122 virtio_ccw_stop_ioeventfd(dev); 1123 } 1124 return virtio_ccw_set_guest2host_notifier(dev, n, assign, false); 1125 } 1126 1127 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev) 1128 { 1129 int r; 1130 1131 if (!dev->sch->thinint_active) { 1132 return -EINVAL; 1133 } 1134 1135 r = map_indicator(&dev->routes.adapter, dev->summary_indicator); 1136 if (r) { 1137 return r; 1138 } 1139 r = map_indicator(&dev->routes.adapter, dev->indicators); 1140 if (r) { 1141 return r; 1142 } 1143 dev->routes.adapter.summary_addr = dev->summary_indicator->map; 1144 dev->routes.adapter.ind_addr = dev->indicators->map; 1145 1146 return 0; 1147 } 1148 1149 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs) 1150 { 1151 int i; 1152 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1153 int ret; 1154 S390FLICState *fs = s390_get_flic(); 1155 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1156 1157 ret = virtio_ccw_get_mappings(dev); 1158 if (ret) { 1159 return ret; 1160 } 1161 for (i = 0; i < nvqs; i++) { 1162 if (!virtio_queue_get_num(vdev, i)) { 1163 break; 1164 } 1165 } 1166 dev->routes.num_routes = i; 1167 return fsc->add_adapter_routes(fs, &dev->routes); 1168 } 1169 1170 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs) 1171 { 1172 S390FLICState *fs = s390_get_flic(); 1173 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1174 1175 fsc->release_adapter_routes(fs, &dev->routes); 1176 } 1177 1178 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n) 1179 { 1180 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1181 VirtQueue *vq = virtio_get_queue(vdev, n); 1182 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1183 1184 return kvm_irqchip_add_irqfd_notifier(kvm_state, notifier, NULL, 1185 dev->routes.gsi[n]); 1186 } 1187 1188 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n) 1189 { 1190 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1191 VirtQueue *vq = virtio_get_queue(vdev, n); 1192 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1193 int ret; 1194 1195 ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, notifier, 1196 dev->routes.gsi[n]); 1197 assert(ret == 0); 1198 } 1199 1200 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n, 1201 bool assign, bool with_irqfd) 1202 { 1203 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1204 VirtQueue *vq = virtio_get_queue(vdev, n); 1205 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1206 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 1207 1208 if (assign) { 1209 int r = event_notifier_init(notifier, 0); 1210 1211 if (r < 0) { 1212 return r; 1213 } 1214 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 1215 if (with_irqfd) { 1216 r = virtio_ccw_add_irqfd(dev, n); 1217 if (r) { 1218 virtio_queue_set_guest_notifier_fd_handler(vq, false, 1219 with_irqfd); 1220 return r; 1221 } 1222 } 1223 /* 1224 * We do not support individual masking for channel devices, so we 1225 * need to manually trigger any guest masking callbacks here. 1226 */ 1227 if (k->guest_notifier_mask) { 1228 k->guest_notifier_mask(vdev, n, false); 1229 } 1230 /* get lost events and re-inject */ 1231 if (k->guest_notifier_pending && 1232 k->guest_notifier_pending(vdev, n)) { 1233 event_notifier_set(notifier); 1234 } 1235 } else { 1236 if (k->guest_notifier_mask) { 1237 k->guest_notifier_mask(vdev, n, true); 1238 } 1239 if (with_irqfd) { 1240 virtio_ccw_remove_irqfd(dev, n); 1241 } 1242 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 1243 event_notifier_cleanup(notifier); 1244 } 1245 return 0; 1246 } 1247 1248 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs, 1249 bool assigned) 1250 { 1251 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1252 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1253 bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled(); 1254 int r, n; 1255 1256 if (with_irqfd && assigned) { 1257 /* irq routes need to be set up before assigning irqfds */ 1258 r = virtio_ccw_setup_irqroutes(dev, nvqs); 1259 if (r < 0) { 1260 goto irqroute_error; 1261 } 1262 } 1263 for (n = 0; n < nvqs; n++) { 1264 if (!virtio_queue_get_num(vdev, n)) { 1265 break; 1266 } 1267 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd); 1268 if (r < 0) { 1269 goto assign_error; 1270 } 1271 } 1272 if (with_irqfd && !assigned) { 1273 /* release irq routes after irqfds have been released */ 1274 virtio_ccw_release_irqroutes(dev, nvqs); 1275 } 1276 return 0; 1277 1278 assign_error: 1279 while (--n >= 0) { 1280 virtio_ccw_set_guest_notifier(dev, n, !assigned, false); 1281 } 1282 irqroute_error: 1283 if (with_irqfd && assigned) { 1284 virtio_ccw_release_irqroutes(dev, nvqs); 1285 } 1286 return r; 1287 } 1288 1289 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f) 1290 { 1291 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1292 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1293 1294 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 1295 } 1296 1297 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f) 1298 { 1299 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1300 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1301 uint16_t vector; 1302 1303 qemu_get_be16s(f, &vector); 1304 virtio_queue_set_vector(vdev, n , vector); 1305 1306 return 0; 1307 } 1308 1309 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) 1310 { 1311 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1312 SubchDev *s = dev->sch; 1313 1314 subch_device_save(s, f); 1315 if (dev->indicators != NULL) { 1316 qemu_put_be32(f, dev->indicators->len); 1317 qemu_put_be64(f, dev->indicators->addr); 1318 } else { 1319 qemu_put_be32(f, 0); 1320 qemu_put_be64(f, 0UL); 1321 } 1322 if (dev->indicators2 != NULL) { 1323 qemu_put_be32(f, dev->indicators2->len); 1324 qemu_put_be64(f, dev->indicators2->addr); 1325 } else { 1326 qemu_put_be32(f, 0); 1327 qemu_put_be64(f, 0UL); 1328 } 1329 if (dev->summary_indicator != NULL) { 1330 qemu_put_be32(f, dev->summary_indicator->len); 1331 qemu_put_be64(f, dev->summary_indicator->addr); 1332 } else { 1333 qemu_put_be32(f, 0); 1334 qemu_put_be64(f, 0UL); 1335 } 1336 qemu_put_be64(f, dev->routes.adapter.ind_offset); 1337 qemu_put_byte(f, dev->thinint_isc); 1338 } 1339 1340 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) 1341 { 1342 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1343 SubchDev *s = dev->sch; 1344 int len; 1345 1346 s->driver_data = dev; 1347 subch_device_load(s, f); 1348 len = qemu_get_be32(f); 1349 if (len != 0) { 1350 dev->indicators = get_indicator(qemu_get_be64(f), len); 1351 } else { 1352 qemu_get_be64(f); 1353 dev->indicators = NULL; 1354 } 1355 len = qemu_get_be32(f); 1356 if (len != 0) { 1357 dev->indicators2 = get_indicator(qemu_get_be64(f), len); 1358 } else { 1359 qemu_get_be64(f); 1360 dev->indicators2 = NULL; 1361 } 1362 len = qemu_get_be32(f); 1363 if (len != 0) { 1364 dev->summary_indicator = get_indicator(qemu_get_be64(f), len); 1365 } else { 1366 qemu_get_be64(f); 1367 dev->summary_indicator = NULL; 1368 } 1369 dev->routes.adapter.ind_offset = qemu_get_be64(f); 1370 dev->thinint_isc = qemu_get_byte(f); 1371 if (s->thinint_active) { 1372 return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 1373 dev->thinint_isc, true, false, 1374 &dev->routes.adapter.adapter_id); 1375 } 1376 1377 return 0; 1378 } 1379 1380 /* This is called by virtio-bus just after the device is plugged. */ 1381 static void virtio_ccw_device_plugged(DeviceState *d, Error **errp) 1382 { 1383 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1384 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1385 SubchDev *sch = dev->sch; 1386 int n = virtio_get_num_queues(vdev); 1387 1388 if (virtio_get_num_queues(vdev) > VIRTIO_CCW_QUEUE_MAX) { 1389 error_setg(errp, "The nubmer of virtqueues %d " 1390 "exceeds ccw limit %d", n, 1391 VIRTIO_CCW_QUEUE_MAX); 1392 return; 1393 } 1394 1395 sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus); 1396 1397 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1398 d->hotplugged, 1); 1399 } 1400 1401 static void virtio_ccw_device_unplugged(DeviceState *d) 1402 { 1403 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1404 1405 virtio_ccw_stop_ioeventfd(dev); 1406 } 1407 /**************** Virtio-ccw Bus Device Descriptions *******************/ 1408 1409 static Property virtio_ccw_net_properties[] = { 1410 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1411 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1412 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1413 DEFINE_PROP_END_OF_LIST(), 1414 }; 1415 1416 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data) 1417 { 1418 DeviceClass *dc = DEVICE_CLASS(klass); 1419 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1420 1421 k->realize = virtio_ccw_net_realize; 1422 k->exit = virtio_ccw_exit; 1423 dc->reset = virtio_ccw_reset; 1424 dc->props = virtio_ccw_net_properties; 1425 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1426 } 1427 1428 static const TypeInfo virtio_ccw_net = { 1429 .name = TYPE_VIRTIO_NET_CCW, 1430 .parent = TYPE_VIRTIO_CCW_DEVICE, 1431 .instance_size = sizeof(VirtIONetCcw), 1432 .instance_init = virtio_ccw_net_instance_init, 1433 .class_init = virtio_ccw_net_class_init, 1434 }; 1435 1436 static Property virtio_ccw_blk_properties[] = { 1437 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1438 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1439 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1440 DEFINE_PROP_END_OF_LIST(), 1441 }; 1442 1443 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data) 1444 { 1445 DeviceClass *dc = DEVICE_CLASS(klass); 1446 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1447 1448 k->realize = virtio_ccw_blk_realize; 1449 k->exit = virtio_ccw_exit; 1450 dc->reset = virtio_ccw_reset; 1451 dc->props = virtio_ccw_blk_properties; 1452 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1453 } 1454 1455 static const TypeInfo virtio_ccw_blk = { 1456 .name = TYPE_VIRTIO_BLK_CCW, 1457 .parent = TYPE_VIRTIO_CCW_DEVICE, 1458 .instance_size = sizeof(VirtIOBlkCcw), 1459 .instance_init = virtio_ccw_blk_instance_init, 1460 .class_init = virtio_ccw_blk_class_init, 1461 }; 1462 1463 static Property virtio_ccw_serial_properties[] = { 1464 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1465 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1466 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1467 DEFINE_PROP_END_OF_LIST(), 1468 }; 1469 1470 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data) 1471 { 1472 DeviceClass *dc = DEVICE_CLASS(klass); 1473 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1474 1475 k->realize = virtio_ccw_serial_realize; 1476 k->exit = virtio_ccw_exit; 1477 dc->reset = virtio_ccw_reset; 1478 dc->props = virtio_ccw_serial_properties; 1479 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 1480 } 1481 1482 static const TypeInfo virtio_ccw_serial = { 1483 .name = TYPE_VIRTIO_SERIAL_CCW, 1484 .parent = TYPE_VIRTIO_CCW_DEVICE, 1485 .instance_size = sizeof(VirtioSerialCcw), 1486 .instance_init = virtio_ccw_serial_instance_init, 1487 .class_init = virtio_ccw_serial_class_init, 1488 }; 1489 1490 static Property virtio_ccw_balloon_properties[] = { 1491 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1492 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1493 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1494 DEFINE_PROP_END_OF_LIST(), 1495 }; 1496 1497 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data) 1498 { 1499 DeviceClass *dc = DEVICE_CLASS(klass); 1500 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1501 1502 k->realize = virtio_ccw_balloon_realize; 1503 k->exit = virtio_ccw_exit; 1504 dc->reset = virtio_ccw_reset; 1505 dc->props = virtio_ccw_balloon_properties; 1506 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1507 } 1508 1509 static const TypeInfo virtio_ccw_balloon = { 1510 .name = TYPE_VIRTIO_BALLOON_CCW, 1511 .parent = TYPE_VIRTIO_CCW_DEVICE, 1512 .instance_size = sizeof(VirtIOBalloonCcw), 1513 .instance_init = virtio_ccw_balloon_instance_init, 1514 .class_init = virtio_ccw_balloon_class_init, 1515 }; 1516 1517 static Property virtio_ccw_scsi_properties[] = { 1518 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1519 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1520 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1521 DEFINE_PROP_END_OF_LIST(), 1522 }; 1523 1524 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data) 1525 { 1526 DeviceClass *dc = DEVICE_CLASS(klass); 1527 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1528 1529 k->realize = virtio_ccw_scsi_realize; 1530 k->exit = virtio_ccw_exit; 1531 dc->reset = virtio_ccw_reset; 1532 dc->props = virtio_ccw_scsi_properties; 1533 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1534 } 1535 1536 static const TypeInfo virtio_ccw_scsi = { 1537 .name = TYPE_VIRTIO_SCSI_CCW, 1538 .parent = TYPE_VIRTIO_CCW_DEVICE, 1539 .instance_size = sizeof(VirtIOSCSICcw), 1540 .instance_init = virtio_ccw_scsi_instance_init, 1541 .class_init = virtio_ccw_scsi_class_init, 1542 }; 1543 1544 #ifdef CONFIG_VHOST_SCSI 1545 static Property vhost_ccw_scsi_properties[] = { 1546 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1547 DEFINE_PROP_END_OF_LIST(), 1548 }; 1549 1550 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data) 1551 { 1552 DeviceClass *dc = DEVICE_CLASS(klass); 1553 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1554 1555 k->realize = vhost_ccw_scsi_realize; 1556 k->exit = virtio_ccw_exit; 1557 dc->reset = virtio_ccw_reset; 1558 dc->props = vhost_ccw_scsi_properties; 1559 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1560 } 1561 1562 static const TypeInfo vhost_ccw_scsi = { 1563 .name = TYPE_VHOST_SCSI_CCW, 1564 .parent = TYPE_VIRTIO_CCW_DEVICE, 1565 .instance_size = sizeof(VHostSCSICcw), 1566 .instance_init = vhost_ccw_scsi_instance_init, 1567 .class_init = vhost_ccw_scsi_class_init, 1568 }; 1569 #endif 1570 1571 static void virtio_ccw_rng_instance_init(Object *obj) 1572 { 1573 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj); 1574 1575 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1576 TYPE_VIRTIO_RNG); 1577 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), 1578 "rng", &error_abort); 1579 } 1580 1581 static Property virtio_ccw_rng_properties[] = { 1582 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1583 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1584 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1585 DEFINE_PROP_END_OF_LIST(), 1586 }; 1587 1588 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data) 1589 { 1590 DeviceClass *dc = DEVICE_CLASS(klass); 1591 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1592 1593 k->realize = virtio_ccw_rng_realize; 1594 k->exit = virtio_ccw_exit; 1595 dc->reset = virtio_ccw_reset; 1596 dc->props = virtio_ccw_rng_properties; 1597 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1598 } 1599 1600 static const TypeInfo virtio_ccw_rng = { 1601 .name = TYPE_VIRTIO_RNG_CCW, 1602 .parent = TYPE_VIRTIO_CCW_DEVICE, 1603 .instance_size = sizeof(VirtIORNGCcw), 1604 .instance_init = virtio_ccw_rng_instance_init, 1605 .class_init = virtio_ccw_rng_class_init, 1606 }; 1607 1608 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp) 1609 { 1610 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1611 1612 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev); 1613 virtio_ccw_device_realize(_dev, errp); 1614 } 1615 1616 static int virtio_ccw_busdev_exit(DeviceState *dev) 1617 { 1618 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1619 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1620 1621 return _info->exit(_dev); 1622 } 1623 1624 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev, 1625 DeviceState *dev, Error **errp) 1626 { 1627 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1628 SubchDev *sch = _dev->sch; 1629 1630 virtio_ccw_stop_ioeventfd(_dev); 1631 1632 /* 1633 * We should arrive here only for device_del, since we don't support 1634 * direct hot(un)plug of channels, but only through virtio. 1635 */ 1636 assert(sch != NULL); 1637 /* Subchannel is now disabled and no longer valid. */ 1638 sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA | 1639 PMCW_FLAGS_MASK_DNV); 1640 1641 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0); 1642 1643 object_unparent(OBJECT(dev)); 1644 } 1645 1646 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) 1647 { 1648 DeviceClass *dc = DEVICE_CLASS(klass); 1649 1650 dc->realize = virtio_ccw_busdev_realize; 1651 dc->exit = virtio_ccw_busdev_exit; 1652 dc->bus_type = TYPE_VIRTUAL_CSS_BUS; 1653 } 1654 1655 static const TypeInfo virtio_ccw_device_info = { 1656 .name = TYPE_VIRTIO_CCW_DEVICE, 1657 .parent = TYPE_DEVICE, 1658 .instance_size = sizeof(VirtioCcwDevice), 1659 .class_init = virtio_ccw_device_class_init, 1660 .class_size = sizeof(VirtIOCCWDeviceClass), 1661 .abstract = true, 1662 }; 1663 1664 /***************** Virtual-css Bus Bridge Device ********************/ 1665 /* Only required to have the virtio bus as child in the system bus */ 1666 1667 static int virtual_css_bridge_init(SysBusDevice *dev) 1668 { 1669 /* nothing */ 1670 return 0; 1671 } 1672 1673 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data) 1674 { 1675 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 1676 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 1677 DeviceClass *dc = DEVICE_CLASS(klass); 1678 1679 k->init = virtual_css_bridge_init; 1680 hc->unplug = virtio_ccw_busdev_unplug; 1681 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 1682 } 1683 1684 static const TypeInfo virtual_css_bridge_info = { 1685 .name = "virtual-css-bridge", 1686 .parent = TYPE_SYS_BUS_DEVICE, 1687 .instance_size = sizeof(SysBusDevice), 1688 .class_init = virtual_css_bridge_class_init, 1689 .interfaces = (InterfaceInfo[]) { 1690 { TYPE_HOTPLUG_HANDLER }, 1691 { } 1692 } 1693 }; 1694 1695 /* virtio-ccw-bus */ 1696 1697 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 1698 VirtioCcwDevice *dev) 1699 { 1700 DeviceState *qdev = DEVICE(dev); 1701 char virtio_bus_name[] = "virtio-bus"; 1702 1703 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS, 1704 qdev, virtio_bus_name); 1705 } 1706 1707 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data) 1708 { 1709 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1710 BusClass *bus_class = BUS_CLASS(klass); 1711 1712 bus_class->max_dev = 1; 1713 k->notify = virtio_ccw_notify; 1714 k->vmstate_change = virtio_ccw_vmstate_change; 1715 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers; 1716 k->set_host_notifier = virtio_ccw_set_host_notifier; 1717 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers; 1718 k->save_queue = virtio_ccw_save_queue; 1719 k->load_queue = virtio_ccw_load_queue; 1720 k->save_config = virtio_ccw_save_config; 1721 k->load_config = virtio_ccw_load_config; 1722 k->device_plugged = virtio_ccw_device_plugged; 1723 k->device_unplugged = virtio_ccw_device_unplugged; 1724 } 1725 1726 static const TypeInfo virtio_ccw_bus_info = { 1727 .name = TYPE_VIRTIO_CCW_BUS, 1728 .parent = TYPE_VIRTIO_BUS, 1729 .instance_size = sizeof(VirtioCcwBusState), 1730 .class_init = virtio_ccw_bus_class_init, 1731 }; 1732 1733 static void virtio_ccw_register(void) 1734 { 1735 type_register_static(&virtio_ccw_bus_info); 1736 type_register_static(&virtual_css_bus_info); 1737 type_register_static(&virtio_ccw_device_info); 1738 type_register_static(&virtio_ccw_serial); 1739 type_register_static(&virtio_ccw_blk); 1740 type_register_static(&virtio_ccw_net); 1741 type_register_static(&virtio_ccw_balloon); 1742 type_register_static(&virtio_ccw_scsi); 1743 #ifdef CONFIG_VHOST_SCSI 1744 type_register_static(&vhost_ccw_scsi); 1745 #endif 1746 type_register_static(&virtio_ccw_rng); 1747 type_register_static(&virtual_css_bridge_info); 1748 } 1749 1750 type_init(virtio_ccw_register) 1751