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_PCI_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_PCI_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_PCI_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, 0); 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_PCI_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 = ldq_phys(&address_space_memory, ccw.cda); 339 info.align = ldl_phys(&address_space_memory, 340 ccw.cda + sizeof(info.queue)); 341 info.index = lduw_phys(&address_space_memory, 342 ccw.cda + sizeof(info.queue) 343 + sizeof(info.align)); 344 info.num = lduw_phys(&address_space_memory, 345 ccw.cda + sizeof(info.queue) 346 + sizeof(info.align) 347 + sizeof(info.index)); 348 ret = virtio_ccw_set_vqs(sch, info.queue, info.align, info.index, 349 info.num); 350 sch->curr_status.scsw.count = 0; 351 } 352 break; 353 case CCW_CMD_VDEV_RESET: 354 virtio_ccw_stop_ioeventfd(dev); 355 virtio_reset(vdev); 356 ret = 0; 357 break; 358 case CCW_CMD_READ_FEAT: 359 if (check_len) { 360 if (ccw.count != sizeof(features)) { 361 ret = -EINVAL; 362 break; 363 } 364 } else if (ccw.count < sizeof(features)) { 365 /* Can't execute command. */ 366 ret = -EINVAL; 367 break; 368 } 369 if (!ccw.cda) { 370 ret = -EFAULT; 371 } else { 372 features.index = ldub_phys(&address_space_memory, 373 ccw.cda + sizeof(features.features)); 374 if (features.index < ARRAY_SIZE(dev->host_features)) { 375 features.features = dev->host_features[features.index]; 376 } else { 377 /* Return zeroes if the guest supports more feature bits. */ 378 features.features = 0; 379 } 380 stl_le_phys(&address_space_memory, ccw.cda, features.features); 381 sch->curr_status.scsw.count = ccw.count - sizeof(features); 382 ret = 0; 383 } 384 break; 385 case CCW_CMD_WRITE_FEAT: 386 if (check_len) { 387 if (ccw.count != sizeof(features)) { 388 ret = -EINVAL; 389 break; 390 } 391 } else if (ccw.count < sizeof(features)) { 392 /* Can't execute command. */ 393 ret = -EINVAL; 394 break; 395 } 396 if (!ccw.cda) { 397 ret = -EFAULT; 398 } else { 399 features.index = ldub_phys(&address_space_memory, 400 ccw.cda + sizeof(features.features)); 401 features.features = ldl_le_phys(&address_space_memory, ccw.cda); 402 if (features.index < ARRAY_SIZE(dev->host_features)) { 403 virtio_set_features(vdev, features.features); 404 } else { 405 /* 406 * If the guest supports more feature bits, assert that it 407 * passes us zeroes for those we don't support. 408 */ 409 if (features.features) { 410 fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n", 411 features.index, features.features); 412 /* XXX: do a unit check here? */ 413 } 414 } 415 sch->curr_status.scsw.count = ccw.count - sizeof(features); 416 ret = 0; 417 } 418 break; 419 case CCW_CMD_READ_CONF: 420 if (check_len) { 421 if (ccw.count > vdev->config_len) { 422 ret = -EINVAL; 423 break; 424 } 425 } 426 len = MIN(ccw.count, vdev->config_len); 427 if (!ccw.cda) { 428 ret = -EFAULT; 429 } else { 430 virtio_bus_get_vdev_config(&dev->bus, vdev->config); 431 /* XXX config space endianness */ 432 cpu_physical_memory_write(ccw.cda, vdev->config, len); 433 sch->curr_status.scsw.count = ccw.count - len; 434 ret = 0; 435 } 436 break; 437 case CCW_CMD_WRITE_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 hw_len = len; 446 if (!ccw.cda) { 447 ret = -EFAULT; 448 } else { 449 config = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 450 if (!config) { 451 ret = -EFAULT; 452 } else { 453 len = hw_len; 454 /* XXX config space endianness */ 455 memcpy(vdev->config, config, len); 456 cpu_physical_memory_unmap(config, hw_len, 0, hw_len); 457 virtio_bus_set_vdev_config(&dev->bus, vdev->config); 458 sch->curr_status.scsw.count = ccw.count - len; 459 ret = 0; 460 } 461 } 462 break; 463 case CCW_CMD_WRITE_STATUS: 464 if (check_len) { 465 if (ccw.count != sizeof(status)) { 466 ret = -EINVAL; 467 break; 468 } 469 } else if (ccw.count < sizeof(status)) { 470 /* Can't execute command. */ 471 ret = -EINVAL; 472 break; 473 } 474 if (!ccw.cda) { 475 ret = -EFAULT; 476 } else { 477 status = ldub_phys(&address_space_memory, ccw.cda); 478 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 479 virtio_ccw_stop_ioeventfd(dev); 480 } 481 virtio_set_status(vdev, status); 482 if (vdev->status == 0) { 483 virtio_reset(vdev); 484 } 485 if (status & VIRTIO_CONFIG_S_DRIVER_OK) { 486 virtio_ccw_start_ioeventfd(dev); 487 } 488 sch->curr_status.scsw.count = ccw.count - sizeof(status); 489 ret = 0; 490 } 491 break; 492 case CCW_CMD_SET_IND: 493 if (check_len) { 494 if (ccw.count != sizeof(indicators)) { 495 ret = -EINVAL; 496 break; 497 } 498 } else if (ccw.count < sizeof(indicators)) { 499 /* Can't execute command. */ 500 ret = -EINVAL; 501 break; 502 } 503 if (sch->thinint_active) { 504 /* Trigger a command reject. */ 505 ret = -ENOSYS; 506 break; 507 } 508 if (!ccw.cda) { 509 ret = -EFAULT; 510 } else { 511 indicators = ldq_phys(&address_space_memory, ccw.cda); 512 dev->indicators = get_indicator(indicators, sizeof(uint64_t)); 513 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 514 ret = 0; 515 } 516 break; 517 case CCW_CMD_SET_CONF_IND: 518 if (check_len) { 519 if (ccw.count != sizeof(indicators)) { 520 ret = -EINVAL; 521 break; 522 } 523 } else if (ccw.count < sizeof(indicators)) { 524 /* Can't execute command. */ 525 ret = -EINVAL; 526 break; 527 } 528 if (!ccw.cda) { 529 ret = -EFAULT; 530 } else { 531 indicators = ldq_phys(&address_space_memory, ccw.cda); 532 dev->indicators2 = 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_READ_VQ_CONF: 538 if (check_len) { 539 if (ccw.count != sizeof(vq_config)) { 540 ret = -EINVAL; 541 break; 542 } 543 } else if (ccw.count < sizeof(vq_config)) { 544 /* Can't execute command. */ 545 ret = -EINVAL; 546 break; 547 } 548 if (!ccw.cda) { 549 ret = -EFAULT; 550 } else { 551 vq_config.index = lduw_phys(&address_space_memory, ccw.cda); 552 vq_config.num_max = virtio_queue_get_num(vdev, 553 vq_config.index); 554 stw_phys(&address_space_memory, 555 ccw.cda + sizeof(vq_config.index), vq_config.num_max); 556 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config); 557 ret = 0; 558 } 559 break; 560 case CCW_CMD_SET_IND_ADAPTER: 561 if (check_len) { 562 if (ccw.count != sizeof(*thinint)) { 563 ret = -EINVAL; 564 break; 565 } 566 } else if (ccw.count < sizeof(*thinint)) { 567 /* Can't execute command. */ 568 ret = -EINVAL; 569 break; 570 } 571 len = sizeof(*thinint); 572 hw_len = len; 573 if (!ccw.cda) { 574 ret = -EFAULT; 575 } else if (dev->indicators && !sch->thinint_active) { 576 /* Trigger a command reject. */ 577 ret = -ENOSYS; 578 } else { 579 thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 580 if (!thinint) { 581 ret = -EFAULT; 582 } else { 583 len = hw_len; 584 dev->summary_indicator = 585 get_indicator(thinint->summary_indicator, sizeof(uint8_t)); 586 dev->indicators = get_indicator(thinint->device_indicator, 587 thinint->ind_bit / 8 + 1); 588 dev->thinint_isc = thinint->isc; 589 dev->routes.adapter.ind_offset = thinint->ind_bit; 590 dev->routes.adapter.summary_offset = 7; 591 cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len); 592 ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 593 dev->thinint_isc, true, false, 594 &dev->routes.adapter.adapter_id); 595 assert(ret == 0); 596 sch->thinint_active = ((dev->indicators != NULL) && 597 (dev->summary_indicator != NULL)); 598 sch->curr_status.scsw.count = ccw.count - len; 599 ret = 0; 600 } 601 } 602 break; 603 default: 604 ret = -ENOSYS; 605 break; 606 } 607 return ret; 608 } 609 610 static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev) 611 { 612 unsigned int cssid = 0; 613 unsigned int ssid = 0; 614 unsigned int schid; 615 unsigned int devno; 616 bool have_devno = false; 617 bool found = false; 618 SubchDev *sch; 619 int ret; 620 int num; 621 DeviceState *parent = DEVICE(dev); 622 623 sch = g_malloc0(sizeof(SubchDev)); 624 625 sch->driver_data = dev; 626 dev->sch = sch; 627 628 dev->indicators = NULL; 629 630 /* Initialize subchannel structure. */ 631 sch->channel_prog = 0x0; 632 sch->last_cmd_valid = false; 633 sch->thinint_active = false; 634 /* 635 * Use a device number if provided. Otherwise, fall back to subchannel 636 * number. 637 */ 638 if (dev->bus_id) { 639 num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno); 640 if (num == 3) { 641 if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) { 642 ret = -EINVAL; 643 error_report("Invalid cssid or ssid: cssid %x, ssid %x", 644 cssid, ssid); 645 goto out_err; 646 } 647 /* Enforce use of virtual cssid. */ 648 if (cssid != VIRTUAL_CSSID) { 649 ret = -EINVAL; 650 error_report("cssid %x not valid for virtio devices", cssid); 651 goto out_err; 652 } 653 if (css_devno_used(cssid, ssid, devno)) { 654 ret = -EEXIST; 655 error_report("Device %x.%x.%04x already exists", cssid, ssid, 656 devno); 657 goto out_err; 658 } 659 sch->cssid = cssid; 660 sch->ssid = ssid; 661 sch->devno = devno; 662 have_devno = true; 663 } else { 664 ret = -EINVAL; 665 error_report("Malformed devno parameter '%s'", dev->bus_id); 666 goto out_err; 667 } 668 } 669 670 /* Find the next free id. */ 671 if (have_devno) { 672 for (schid = 0; schid <= MAX_SCHID; schid++) { 673 if (!css_find_subch(1, cssid, ssid, schid)) { 674 sch->schid = schid; 675 css_subch_assign(cssid, ssid, schid, devno, sch); 676 found = true; 677 break; 678 } 679 } 680 if (!found) { 681 ret = -ENODEV; 682 error_report("No free subchannel found for %x.%x.%04x", cssid, ssid, 683 devno); 684 goto out_err; 685 } 686 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 687 "user-configured"); 688 } else { 689 cssid = VIRTUAL_CSSID; 690 for (ssid = 0; ssid <= MAX_SSID; ssid++) { 691 for (schid = 0; schid <= MAX_SCHID; schid++) { 692 if (!css_find_subch(1, cssid, ssid, schid)) { 693 sch->cssid = cssid; 694 sch->ssid = ssid; 695 sch->schid = schid; 696 devno = schid; 697 /* 698 * If the devno is already taken, look further in this 699 * subchannel set. 700 */ 701 while (css_devno_used(cssid, ssid, devno)) { 702 if (devno == MAX_SCHID) { 703 devno = 0; 704 } else if (devno == schid - 1) { 705 ret = -ENODEV; 706 error_report("No free devno found"); 707 goto out_err; 708 } else { 709 devno++; 710 } 711 } 712 sch->devno = devno; 713 css_subch_assign(cssid, ssid, schid, devno, sch); 714 found = true; 715 break; 716 } 717 } 718 if (found) { 719 break; 720 } 721 } 722 if (!found) { 723 ret = -ENODEV; 724 error_report("Virtual channel subsystem is full!"); 725 goto out_err; 726 } 727 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 728 "auto-configured"); 729 } 730 731 /* Build initial schib. */ 732 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); 733 734 sch->ccw_cb = virtio_ccw_cb; 735 736 /* Build senseid data. */ 737 memset(&sch->id, 0, sizeof(SenseId)); 738 sch->id.reserved = 0xff; 739 sch->id.cu_type = VIRTIO_CCW_CU_TYPE; 740 sch->id.cu_model = vdev->device_id; 741 742 /* Only the first 32 feature bits are used. */ 743 dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus, 744 dev->host_features[0]); 745 746 virtio_add_feature(&dev->host_features[0], VIRTIO_F_NOTIFY_ON_EMPTY); 747 virtio_add_feature(&dev->host_features[0], VIRTIO_F_BAD_FEATURE); 748 749 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 750 parent->hotplugged, 1); 751 return 0; 752 753 out_err: 754 dev->sch = NULL; 755 g_free(sch); 756 return ret; 757 } 758 759 static int virtio_ccw_exit(VirtioCcwDevice *dev) 760 { 761 SubchDev *sch = dev->sch; 762 763 if (sch) { 764 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 765 g_free(sch); 766 } 767 if (dev->indicators) { 768 release_indicator(&dev->routes.adapter, dev->indicators); 769 dev->indicators = NULL; 770 } 771 return 0; 772 } 773 774 static int virtio_ccw_net_init(VirtioCcwDevice *ccw_dev) 775 { 776 DeviceState *qdev = DEVICE(ccw_dev); 777 VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev); 778 DeviceState *vdev = DEVICE(&dev->vdev); 779 780 virtio_net_set_config_size(&dev->vdev, ccw_dev->host_features[0]); 781 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 782 object_get_typename(OBJECT(qdev))); 783 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 784 if (qdev_init(vdev) < 0) { 785 return -1; 786 } 787 788 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 789 } 790 791 static void virtio_ccw_net_instance_init(Object *obj) 792 { 793 VirtIONetCcw *dev = VIRTIO_NET_CCW(obj); 794 795 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 796 TYPE_VIRTIO_NET); 797 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 798 "bootindex", &error_abort); 799 } 800 801 static int virtio_ccw_blk_init(VirtioCcwDevice *ccw_dev) 802 { 803 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev); 804 DeviceState *vdev = DEVICE(&dev->vdev); 805 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 806 if (qdev_init(vdev) < 0) { 807 return -1; 808 } 809 810 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 811 } 812 813 static void virtio_ccw_blk_instance_init(Object *obj) 814 { 815 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj); 816 817 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 818 TYPE_VIRTIO_BLK); 819 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread", 820 &error_abort); 821 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 822 "bootindex", &error_abort); 823 } 824 825 static int virtio_ccw_serial_init(VirtioCcwDevice *ccw_dev) 826 { 827 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev); 828 DeviceState *vdev = DEVICE(&dev->vdev); 829 DeviceState *proxy = DEVICE(ccw_dev); 830 char *bus_name; 831 832 /* 833 * For command line compatibility, this sets the virtio-serial-device bus 834 * name as before. 835 */ 836 if (proxy->id) { 837 bus_name = g_strdup_printf("%s.0", proxy->id); 838 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 839 g_free(bus_name); 840 } 841 842 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 843 if (qdev_init(vdev) < 0) { 844 return -1; 845 } 846 847 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 848 } 849 850 851 static void virtio_ccw_serial_instance_init(Object *obj) 852 { 853 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj); 854 855 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 856 TYPE_VIRTIO_SERIAL); 857 } 858 859 static int virtio_ccw_balloon_init(VirtioCcwDevice *ccw_dev) 860 { 861 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev); 862 DeviceState *vdev = DEVICE(&dev->vdev); 863 864 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 865 if (qdev_init(vdev) < 0) { 866 return -1; 867 } 868 869 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 870 } 871 872 static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v, 873 void *opaque, const char *name, 874 Error **errp) 875 { 876 VirtIOBalloonCcw *dev = opaque; 877 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); 878 } 879 880 static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v, 881 void *opaque, const char *name, 882 Error **errp) 883 { 884 VirtIOBalloonCcw *dev = opaque; 885 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 886 errp); 887 } 888 889 static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v, 890 void *opaque, const char *name, 891 Error **errp) 892 { 893 VirtIOBalloonCcw *dev = opaque; 894 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 895 errp); 896 } 897 898 static void virtio_ccw_balloon_instance_init(Object *obj) 899 { 900 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj); 901 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 902 TYPE_VIRTIO_BALLOON); 903 object_property_add(obj, "guest-stats", "guest statistics", 904 balloon_ccw_stats_get_all, NULL, NULL, dev, NULL); 905 906 object_property_add(obj, "guest-stats-polling-interval", "int", 907 balloon_ccw_stats_get_poll_interval, 908 balloon_ccw_stats_set_poll_interval, 909 NULL, dev, NULL); 910 } 911 912 static int virtio_ccw_scsi_init(VirtioCcwDevice *ccw_dev) 913 { 914 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev); 915 DeviceState *vdev = DEVICE(&dev->vdev); 916 DeviceState *qdev = DEVICE(ccw_dev); 917 char *bus_name; 918 919 /* 920 * For command line compatibility, this sets the virtio-scsi-device bus 921 * name as before. 922 */ 923 if (qdev->id) { 924 bus_name = g_strdup_printf("%s.0", qdev->id); 925 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 926 g_free(bus_name); 927 } 928 929 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 930 if (qdev_init(vdev) < 0) { 931 return -1; 932 } 933 934 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 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 int vhost_ccw_scsi_init(VirtioCcwDevice *ccw_dev) 949 { 950 VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev); 951 DeviceState *vdev = DEVICE(&dev->vdev); 952 953 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 954 if (qdev_init(vdev) < 0) { 955 return -1; 956 } 957 958 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 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 int virtio_ccw_rng_init(VirtioCcwDevice *ccw_dev) 971 { 972 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev); 973 DeviceState *vdev = DEVICE(&dev->vdev); 974 975 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 976 if (qdev_init(vdev) < 0) { 977 return -1; 978 } 979 980 object_property_set_link(OBJECT(dev), 981 OBJECT(dev->vdev.conf.rng), "rng", 982 NULL); 983 984 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 985 } 986 987 /* DeviceState to VirtioCcwDevice. Note: used on datapath, 988 * be careful and test performance if you change this. 989 */ 990 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) 991 { 992 return container_of(d, VirtioCcwDevice, parent_obj); 993 } 994 995 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, 996 uint8_t to_be_set) 997 { 998 uint8_t ind_old, ind_new; 999 hwaddr len = 1; 1000 uint8_t *ind_addr; 1001 1002 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 1003 if (!ind_addr) { 1004 error_report("%s(%x.%x.%04x): unable to access indicator", 1005 __func__, sch->cssid, sch->ssid, sch->schid); 1006 return -1; 1007 } 1008 do { 1009 ind_old = *ind_addr; 1010 ind_new = ind_old | to_be_set; 1011 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 1012 cpu_physical_memory_unmap(ind_addr, len, 1, len); 1013 1014 return ind_old; 1015 } 1016 1017 static void virtio_ccw_notify(DeviceState *d, uint16_t vector) 1018 { 1019 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); 1020 SubchDev *sch = dev->sch; 1021 uint64_t indicators; 1022 1023 if (vector >= 128) { 1024 return; 1025 } 1026 1027 if (vector < VIRTIO_PCI_QUEUE_MAX) { 1028 if (!dev->indicators) { 1029 return; 1030 } 1031 if (sch->thinint_active) { 1032 /* 1033 * In the adapter interrupt case, indicators points to a 1034 * memory area that may be (way) larger than 64 bit and 1035 * ind_bit indicates the start of the indicators in a big 1036 * endian notation. 1037 */ 1038 uint64_t ind_bit = dev->routes.adapter.ind_offset; 1039 1040 virtio_set_ind_atomic(sch, dev->indicators->addr + 1041 (ind_bit + vector) / 8, 1042 0x80 >> ((ind_bit + vector) % 8)); 1043 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr, 1044 0x01)) { 1045 css_adapter_interrupt(dev->thinint_isc); 1046 } 1047 } else { 1048 indicators = ldq_phys(&address_space_memory, dev->indicators->addr); 1049 indicators |= 1ULL << vector; 1050 stq_phys(&address_space_memory, dev->indicators->addr, indicators); 1051 css_conditional_io_interrupt(sch); 1052 } 1053 } else { 1054 if (!dev->indicators2) { 1055 return; 1056 } 1057 vector = 0; 1058 indicators = ldq_phys(&address_space_memory, dev->indicators2->addr); 1059 indicators |= 1ULL << vector; 1060 stq_phys(&address_space_memory, dev->indicators2->addr, indicators); 1061 css_conditional_io_interrupt(sch); 1062 } 1063 } 1064 1065 static unsigned virtio_ccw_get_features(DeviceState *d) 1066 { 1067 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1068 1069 /* Only the first 32 feature bits are used. */ 1070 return dev->host_features[0]; 1071 } 1072 1073 static void virtio_ccw_reset(DeviceState *d) 1074 { 1075 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1076 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1077 1078 virtio_ccw_stop_ioeventfd(dev); 1079 virtio_reset(vdev); 1080 css_reset_sch(dev->sch); 1081 if (dev->indicators) { 1082 release_indicator(&dev->routes.adapter, dev->indicators); 1083 dev->indicators = NULL; 1084 } 1085 if (dev->indicators2) { 1086 release_indicator(&dev->routes.adapter, dev->indicators2); 1087 dev->indicators2 = NULL; 1088 } 1089 if (dev->summary_indicator) { 1090 release_indicator(&dev->routes.adapter, dev->summary_indicator); 1091 dev->summary_indicator = NULL; 1092 } 1093 } 1094 1095 static void virtio_ccw_vmstate_change(DeviceState *d, bool running) 1096 { 1097 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1098 1099 if (running) { 1100 virtio_ccw_start_ioeventfd(dev); 1101 } else { 1102 virtio_ccw_stop_ioeventfd(dev); 1103 } 1104 } 1105 1106 static bool virtio_ccw_query_guest_notifiers(DeviceState *d) 1107 { 1108 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1109 1110 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA); 1111 } 1112 1113 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign) 1114 { 1115 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1116 1117 /* Stop using the generic ioeventfd, we are doing eventfd handling 1118 * ourselves below */ 1119 dev->ioeventfd_disabled = assign; 1120 if (assign) { 1121 virtio_ccw_stop_ioeventfd(dev); 1122 } 1123 return virtio_ccw_set_guest2host_notifier(dev, n, assign, false); 1124 } 1125 1126 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev) 1127 { 1128 int r; 1129 1130 if (!dev->sch->thinint_active) { 1131 return -EINVAL; 1132 } 1133 1134 r = map_indicator(&dev->routes.adapter, dev->summary_indicator); 1135 if (r) { 1136 return r; 1137 } 1138 r = map_indicator(&dev->routes.adapter, dev->indicators); 1139 if (r) { 1140 return r; 1141 } 1142 dev->routes.adapter.summary_addr = dev->summary_indicator->map; 1143 dev->routes.adapter.ind_addr = dev->indicators->map; 1144 1145 return 0; 1146 } 1147 1148 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs) 1149 { 1150 int i; 1151 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1152 int ret; 1153 S390FLICState *fs = s390_get_flic(); 1154 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1155 1156 ret = virtio_ccw_get_mappings(dev); 1157 if (ret) { 1158 return ret; 1159 } 1160 for (i = 0; i < nvqs; i++) { 1161 if (!virtio_queue_get_num(vdev, i)) { 1162 break; 1163 } 1164 } 1165 dev->routes.num_routes = i; 1166 return fsc->add_adapter_routes(fs, &dev->routes); 1167 } 1168 1169 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs) 1170 { 1171 S390FLICState *fs = s390_get_flic(); 1172 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1173 1174 fsc->release_adapter_routes(fs, &dev->routes); 1175 } 1176 1177 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n) 1178 { 1179 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1180 VirtQueue *vq = virtio_get_queue(vdev, n); 1181 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1182 1183 return kvm_irqchip_add_irqfd_notifier(kvm_state, notifier, NULL, 1184 dev->routes.gsi[n]); 1185 } 1186 1187 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n) 1188 { 1189 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1190 VirtQueue *vq = virtio_get_queue(vdev, n); 1191 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1192 int ret; 1193 1194 ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, notifier, 1195 dev->routes.gsi[n]); 1196 assert(ret == 0); 1197 } 1198 1199 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n, 1200 bool assign, bool with_irqfd) 1201 { 1202 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1203 VirtQueue *vq = virtio_get_queue(vdev, n); 1204 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1205 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 1206 1207 if (assign) { 1208 int r = event_notifier_init(notifier, 0); 1209 1210 if (r < 0) { 1211 return r; 1212 } 1213 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 1214 if (with_irqfd) { 1215 r = virtio_ccw_add_irqfd(dev, n); 1216 if (r) { 1217 virtio_queue_set_guest_notifier_fd_handler(vq, false, 1218 with_irqfd); 1219 return r; 1220 } 1221 } 1222 /* 1223 * We do not support individual masking for channel devices, so we 1224 * need to manually trigger any guest masking callbacks here. 1225 */ 1226 if (k->guest_notifier_mask) { 1227 k->guest_notifier_mask(vdev, n, false); 1228 } 1229 /* get lost events and re-inject */ 1230 if (k->guest_notifier_pending && 1231 k->guest_notifier_pending(vdev, n)) { 1232 event_notifier_set(notifier); 1233 } 1234 } else { 1235 if (k->guest_notifier_mask) { 1236 k->guest_notifier_mask(vdev, n, true); 1237 } 1238 if (with_irqfd) { 1239 virtio_ccw_remove_irqfd(dev, n); 1240 } 1241 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 1242 event_notifier_cleanup(notifier); 1243 } 1244 return 0; 1245 } 1246 1247 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs, 1248 bool assigned) 1249 { 1250 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1251 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1252 bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled(); 1253 int r, n; 1254 1255 if (with_irqfd && assigned) { 1256 /* irq routes need to be set up before assigning irqfds */ 1257 r = virtio_ccw_setup_irqroutes(dev, nvqs); 1258 if (r < 0) { 1259 goto irqroute_error; 1260 } 1261 } 1262 for (n = 0; n < nvqs; n++) { 1263 if (!virtio_queue_get_num(vdev, n)) { 1264 break; 1265 } 1266 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd); 1267 if (r < 0) { 1268 goto assign_error; 1269 } 1270 } 1271 if (with_irqfd && !assigned) { 1272 /* release irq routes after irqfds have been released */ 1273 virtio_ccw_release_irqroutes(dev, nvqs); 1274 } 1275 return 0; 1276 1277 assign_error: 1278 while (--n >= 0) { 1279 virtio_ccw_set_guest_notifier(dev, n, !assigned, false); 1280 } 1281 irqroute_error: 1282 if (with_irqfd && assigned) { 1283 virtio_ccw_release_irqroutes(dev, nvqs); 1284 } 1285 return r; 1286 } 1287 1288 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f) 1289 { 1290 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1291 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1292 1293 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 1294 } 1295 1296 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f) 1297 { 1298 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1299 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1300 uint16_t vector; 1301 1302 qemu_get_be16s(f, &vector); 1303 virtio_queue_set_vector(vdev, n , vector); 1304 1305 return 0; 1306 } 1307 1308 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) 1309 { 1310 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1311 SubchDev *s = dev->sch; 1312 1313 subch_device_save(s, f); 1314 if (dev->indicators != NULL) { 1315 qemu_put_be32(f, dev->indicators->len); 1316 qemu_put_be64(f, dev->indicators->addr); 1317 } else { 1318 qemu_put_be32(f, 0); 1319 qemu_put_be64(f, 0UL); 1320 } 1321 if (dev->indicators2 != NULL) { 1322 qemu_put_be32(f, dev->indicators2->len); 1323 qemu_put_be64(f, dev->indicators2->addr); 1324 } else { 1325 qemu_put_be32(f, 0); 1326 qemu_put_be64(f, 0UL); 1327 } 1328 if (dev->summary_indicator != NULL) { 1329 qemu_put_be32(f, dev->summary_indicator->len); 1330 qemu_put_be64(f, dev->summary_indicator->addr); 1331 } else { 1332 qemu_put_be32(f, 0); 1333 qemu_put_be64(f, 0UL); 1334 } 1335 qemu_put_be64(f, dev->routes.adapter.ind_offset); 1336 qemu_put_byte(f, dev->thinint_isc); 1337 } 1338 1339 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) 1340 { 1341 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1342 SubchDev *s = dev->sch; 1343 int len; 1344 1345 s->driver_data = dev; 1346 subch_device_load(s, f); 1347 len = qemu_get_be32(f); 1348 if (len != 0) { 1349 dev->indicators = get_indicator(qemu_get_be64(f), len); 1350 } else { 1351 qemu_get_be64(f); 1352 dev->indicators = NULL; 1353 } 1354 len = qemu_get_be32(f); 1355 if (len != 0) { 1356 dev->indicators2 = get_indicator(qemu_get_be64(f), len); 1357 } else { 1358 qemu_get_be64(f); 1359 dev->indicators2 = NULL; 1360 } 1361 len = qemu_get_be32(f); 1362 if (len != 0) { 1363 dev->summary_indicator = get_indicator(qemu_get_be64(f), len); 1364 } else { 1365 qemu_get_be64(f); 1366 dev->summary_indicator = NULL; 1367 } 1368 dev->routes.adapter.ind_offset = qemu_get_be64(f); 1369 dev->thinint_isc = qemu_get_byte(f); 1370 if (s->thinint_active) { 1371 return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 1372 dev->thinint_isc, true, false, 1373 &dev->routes.adapter.adapter_id); 1374 } 1375 1376 return 0; 1377 } 1378 1379 /**************** Virtio-ccw Bus Device Descriptions *******************/ 1380 1381 static Property virtio_ccw_net_properties[] = { 1382 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1383 DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]), 1384 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1385 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1386 DEFINE_PROP_END_OF_LIST(), 1387 }; 1388 1389 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data) 1390 { 1391 DeviceClass *dc = DEVICE_CLASS(klass); 1392 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1393 1394 k->init = virtio_ccw_net_init; 1395 k->exit = virtio_ccw_exit; 1396 dc->reset = virtio_ccw_reset; 1397 dc->props = virtio_ccw_net_properties; 1398 } 1399 1400 static const TypeInfo virtio_ccw_net = { 1401 .name = TYPE_VIRTIO_NET_CCW, 1402 .parent = TYPE_VIRTIO_CCW_DEVICE, 1403 .instance_size = sizeof(VirtIONetCcw), 1404 .instance_init = virtio_ccw_net_instance_init, 1405 .class_init = virtio_ccw_net_class_init, 1406 }; 1407 1408 static Property virtio_ccw_blk_properties[] = { 1409 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1410 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1411 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1412 DEFINE_PROP_END_OF_LIST(), 1413 }; 1414 1415 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data) 1416 { 1417 DeviceClass *dc = DEVICE_CLASS(klass); 1418 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1419 1420 k->init = virtio_ccw_blk_init; 1421 k->exit = virtio_ccw_exit; 1422 dc->reset = virtio_ccw_reset; 1423 dc->props = virtio_ccw_blk_properties; 1424 } 1425 1426 static const TypeInfo virtio_ccw_blk = { 1427 .name = TYPE_VIRTIO_BLK_CCW, 1428 .parent = TYPE_VIRTIO_CCW_DEVICE, 1429 .instance_size = sizeof(VirtIOBlkCcw), 1430 .instance_init = virtio_ccw_blk_instance_init, 1431 .class_init = virtio_ccw_blk_class_init, 1432 }; 1433 1434 static Property virtio_ccw_serial_properties[] = { 1435 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1436 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1437 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1438 DEFINE_PROP_END_OF_LIST(), 1439 }; 1440 1441 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data) 1442 { 1443 DeviceClass *dc = DEVICE_CLASS(klass); 1444 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1445 1446 k->init = virtio_ccw_serial_init; 1447 k->exit = virtio_ccw_exit; 1448 dc->reset = virtio_ccw_reset; 1449 dc->props = virtio_ccw_serial_properties; 1450 } 1451 1452 static const TypeInfo virtio_ccw_serial = { 1453 .name = TYPE_VIRTIO_SERIAL_CCW, 1454 .parent = TYPE_VIRTIO_CCW_DEVICE, 1455 .instance_size = sizeof(VirtioSerialCcw), 1456 .instance_init = virtio_ccw_serial_instance_init, 1457 .class_init = virtio_ccw_serial_class_init, 1458 }; 1459 1460 static Property virtio_ccw_balloon_properties[] = { 1461 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1462 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1463 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1464 DEFINE_PROP_END_OF_LIST(), 1465 }; 1466 1467 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data) 1468 { 1469 DeviceClass *dc = DEVICE_CLASS(klass); 1470 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1471 1472 k->init = virtio_ccw_balloon_init; 1473 k->exit = virtio_ccw_exit; 1474 dc->reset = virtio_ccw_reset; 1475 dc->props = virtio_ccw_balloon_properties; 1476 } 1477 1478 static const TypeInfo virtio_ccw_balloon = { 1479 .name = TYPE_VIRTIO_BALLOON_CCW, 1480 .parent = TYPE_VIRTIO_CCW_DEVICE, 1481 .instance_size = sizeof(VirtIOBalloonCcw), 1482 .instance_init = virtio_ccw_balloon_instance_init, 1483 .class_init = virtio_ccw_balloon_class_init, 1484 }; 1485 1486 static Property virtio_ccw_scsi_properties[] = { 1487 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1488 DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]), 1489 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1490 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1491 DEFINE_PROP_END_OF_LIST(), 1492 }; 1493 1494 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data) 1495 { 1496 DeviceClass *dc = DEVICE_CLASS(klass); 1497 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1498 1499 k->init = virtio_ccw_scsi_init; 1500 k->exit = virtio_ccw_exit; 1501 dc->reset = virtio_ccw_reset; 1502 dc->props = virtio_ccw_scsi_properties; 1503 } 1504 1505 static const TypeInfo virtio_ccw_scsi = { 1506 .name = TYPE_VIRTIO_SCSI_CCW, 1507 .parent = TYPE_VIRTIO_CCW_DEVICE, 1508 .instance_size = sizeof(VirtIOSCSICcw), 1509 .instance_init = virtio_ccw_scsi_instance_init, 1510 .class_init = virtio_ccw_scsi_class_init, 1511 }; 1512 1513 #ifdef CONFIG_VHOST_SCSI 1514 static Property vhost_ccw_scsi_properties[] = { 1515 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1516 DEFINE_PROP_END_OF_LIST(), 1517 }; 1518 1519 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data) 1520 { 1521 DeviceClass *dc = DEVICE_CLASS(klass); 1522 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1523 1524 k->init = vhost_ccw_scsi_init; 1525 k->exit = virtio_ccw_exit; 1526 dc->reset = virtio_ccw_reset; 1527 dc->props = vhost_ccw_scsi_properties; 1528 } 1529 1530 static const TypeInfo vhost_ccw_scsi = { 1531 .name = TYPE_VHOST_SCSI_CCW, 1532 .parent = TYPE_VIRTIO_CCW_DEVICE, 1533 .instance_size = sizeof(VHostSCSICcw), 1534 .instance_init = vhost_ccw_scsi_instance_init, 1535 .class_init = vhost_ccw_scsi_class_init, 1536 }; 1537 #endif 1538 1539 static void virtio_ccw_rng_instance_init(Object *obj) 1540 { 1541 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj); 1542 1543 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1544 TYPE_VIRTIO_RNG); 1545 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), 1546 "rng", &error_abort); 1547 } 1548 1549 static Property virtio_ccw_rng_properties[] = { 1550 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1551 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1552 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1553 DEFINE_PROP_END_OF_LIST(), 1554 }; 1555 1556 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data) 1557 { 1558 DeviceClass *dc = DEVICE_CLASS(klass); 1559 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1560 1561 k->init = virtio_ccw_rng_init; 1562 k->exit = virtio_ccw_exit; 1563 dc->reset = virtio_ccw_reset; 1564 dc->props = virtio_ccw_rng_properties; 1565 } 1566 1567 static const TypeInfo virtio_ccw_rng = { 1568 .name = TYPE_VIRTIO_RNG_CCW, 1569 .parent = TYPE_VIRTIO_CCW_DEVICE, 1570 .instance_size = sizeof(VirtIORNGCcw), 1571 .instance_init = virtio_ccw_rng_instance_init, 1572 .class_init = virtio_ccw_rng_class_init, 1573 }; 1574 1575 static int virtio_ccw_busdev_init(DeviceState *dev) 1576 { 1577 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1578 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1579 1580 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev); 1581 1582 return _info->init(_dev); 1583 } 1584 1585 static int virtio_ccw_busdev_exit(DeviceState *dev) 1586 { 1587 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1588 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1589 1590 return _info->exit(_dev); 1591 } 1592 1593 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev, 1594 DeviceState *dev, Error **errp) 1595 { 1596 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1597 SubchDev *sch = _dev->sch; 1598 1599 virtio_ccw_stop_ioeventfd(_dev); 1600 1601 /* 1602 * We should arrive here only for device_del, since we don't support 1603 * direct hot(un)plug of channels, but only through virtio. 1604 */ 1605 assert(sch != NULL); 1606 /* Subchannel is now disabled and no longer valid. */ 1607 sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA | 1608 PMCW_FLAGS_MASK_DNV); 1609 1610 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0); 1611 1612 object_unparent(OBJECT(dev)); 1613 } 1614 1615 static Property virtio_ccw_properties[] = { 1616 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]), 1617 DEFINE_PROP_END_OF_LIST(), 1618 }; 1619 1620 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) 1621 { 1622 DeviceClass *dc = DEVICE_CLASS(klass); 1623 1624 dc->props = virtio_ccw_properties; 1625 dc->init = virtio_ccw_busdev_init; 1626 dc->exit = virtio_ccw_busdev_exit; 1627 dc->bus_type = TYPE_VIRTUAL_CSS_BUS; 1628 } 1629 1630 static const TypeInfo virtio_ccw_device_info = { 1631 .name = TYPE_VIRTIO_CCW_DEVICE, 1632 .parent = TYPE_DEVICE, 1633 .instance_size = sizeof(VirtioCcwDevice), 1634 .class_init = virtio_ccw_device_class_init, 1635 .class_size = sizeof(VirtIOCCWDeviceClass), 1636 .abstract = true, 1637 }; 1638 1639 /***************** Virtual-css Bus Bridge Device ********************/ 1640 /* Only required to have the virtio bus as child in the system bus */ 1641 1642 static int virtual_css_bridge_init(SysBusDevice *dev) 1643 { 1644 /* nothing */ 1645 return 0; 1646 } 1647 1648 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data) 1649 { 1650 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 1651 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 1652 1653 k->init = virtual_css_bridge_init; 1654 hc->unplug = virtio_ccw_busdev_unplug; 1655 } 1656 1657 static const TypeInfo virtual_css_bridge_info = { 1658 .name = "virtual-css-bridge", 1659 .parent = TYPE_SYS_BUS_DEVICE, 1660 .instance_size = sizeof(SysBusDevice), 1661 .class_init = virtual_css_bridge_class_init, 1662 .interfaces = (InterfaceInfo[]) { 1663 { TYPE_HOTPLUG_HANDLER }, 1664 { } 1665 } 1666 }; 1667 1668 /* virtio-ccw-bus */ 1669 1670 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 1671 VirtioCcwDevice *dev) 1672 { 1673 DeviceState *qdev = DEVICE(dev); 1674 char virtio_bus_name[] = "virtio-bus"; 1675 1676 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS, 1677 qdev, virtio_bus_name); 1678 } 1679 1680 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data) 1681 { 1682 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1683 BusClass *bus_class = BUS_CLASS(klass); 1684 1685 bus_class->max_dev = 1; 1686 k->notify = virtio_ccw_notify; 1687 k->get_features = virtio_ccw_get_features; 1688 k->vmstate_change = virtio_ccw_vmstate_change; 1689 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers; 1690 k->set_host_notifier = virtio_ccw_set_host_notifier; 1691 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers; 1692 k->save_queue = virtio_ccw_save_queue; 1693 k->load_queue = virtio_ccw_load_queue; 1694 k->save_config = virtio_ccw_save_config; 1695 k->load_config = virtio_ccw_load_config; 1696 } 1697 1698 static const TypeInfo virtio_ccw_bus_info = { 1699 .name = TYPE_VIRTIO_CCW_BUS, 1700 .parent = TYPE_VIRTIO_BUS, 1701 .instance_size = sizeof(VirtioCcwBusState), 1702 .class_init = virtio_ccw_bus_class_init, 1703 }; 1704 1705 static void virtio_ccw_register(void) 1706 { 1707 type_register_static(&virtio_ccw_bus_info); 1708 type_register_static(&virtual_css_bus_info); 1709 type_register_static(&virtio_ccw_device_info); 1710 type_register_static(&virtio_ccw_serial); 1711 type_register_static(&virtio_ccw_blk); 1712 type_register_static(&virtio_ccw_net); 1713 type_register_static(&virtio_ccw_balloon); 1714 type_register_static(&virtio_ccw_scsi); 1715 #ifdef CONFIG_VHOST_SCSI 1716 type_register_static(&vhost_ccw_scsi); 1717 #endif 1718 type_register_static(&virtio_ccw_rng); 1719 type_register_static(&virtual_css_bridge_info); 1720 } 1721 1722 type_init(virtio_ccw_register) 1723