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_be_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_be_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_be_phys(&address_space_memory, ccw.cda); 552 vq_config.num_max = virtio_queue_get_num(vdev, 553 vq_config.index); 554 stw_be_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 uint64_t ind_bit = ldq_be_p(&thinint->ind_bit); 584 585 len = hw_len; 586 dev->summary_indicator = 587 get_indicator(ldq_be_p(&thinint->summary_indicator), 588 sizeof(uint8_t)); 589 dev->indicators = 590 get_indicator(ldq_be_p(&thinint->device_indicator), 591 ind_bit / 8 + 1); 592 dev->thinint_isc = thinint->isc; 593 dev->routes.adapter.ind_offset = ind_bit; 594 dev->routes.adapter.summary_offset = 7; 595 cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len); 596 ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 597 dev->thinint_isc, true, false, 598 &dev->routes.adapter.adapter_id); 599 assert(ret == 0); 600 sch->thinint_active = ((dev->indicators != NULL) && 601 (dev->summary_indicator != NULL)); 602 sch->curr_status.scsw.count = ccw.count - len; 603 ret = 0; 604 } 605 } 606 break; 607 default: 608 ret = -ENOSYS; 609 break; 610 } 611 return ret; 612 } 613 614 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, 615 VirtIODevice *vdev, Error **errp) 616 { 617 unsigned int cssid = 0; 618 unsigned int ssid = 0; 619 unsigned int schid; 620 unsigned int devno; 621 bool have_devno = false; 622 bool found = false; 623 SubchDev *sch; 624 int num; 625 DeviceState *parent = DEVICE(dev); 626 627 sch = g_malloc0(sizeof(SubchDev)); 628 629 sch->driver_data = dev; 630 dev->sch = sch; 631 632 dev->indicators = NULL; 633 634 /* Initialize subchannel structure. */ 635 sch->channel_prog = 0x0; 636 sch->last_cmd_valid = false; 637 sch->thinint_active = false; 638 /* 639 * Use a device number if provided. Otherwise, fall back to subchannel 640 * number. 641 */ 642 if (dev->bus_id) { 643 num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno); 644 if (num == 3) { 645 if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) { 646 error_setg(errp, "Invalid cssid or ssid: cssid %x, ssid %x", 647 cssid, ssid); 648 goto out_err; 649 } 650 /* Enforce use of virtual cssid. */ 651 if (cssid != VIRTUAL_CSSID) { 652 error_setg(errp, "cssid %x not valid for virtio devices", 653 cssid); 654 goto out_err; 655 } 656 if (css_devno_used(cssid, ssid, devno)) { 657 error_setg(errp, "Device %x.%x.%04x already exists", 658 cssid, ssid, devno); 659 goto out_err; 660 } 661 sch->cssid = cssid; 662 sch->ssid = ssid; 663 sch->devno = devno; 664 have_devno = true; 665 } else { 666 error_setg(errp, "Malformed devno parameter '%s'", dev->bus_id); 667 goto out_err; 668 } 669 } 670 671 /* Find the next free id. */ 672 if (have_devno) { 673 for (schid = 0; schid <= MAX_SCHID; schid++) { 674 if (!css_find_subch(1, cssid, ssid, schid)) { 675 sch->schid = schid; 676 css_subch_assign(cssid, ssid, schid, devno, sch); 677 found = true; 678 break; 679 } 680 } 681 if (!found) { 682 error_setg(errp, "No free subchannel found for %x.%x.%04x", 683 cssid, ssid, 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 error_setg(errp, "No free devno found"); 706 goto out_err; 707 } else { 708 devno++; 709 } 710 } 711 sch->devno = devno; 712 css_subch_assign(cssid, ssid, schid, devno, sch); 713 found = true; 714 break; 715 } 716 } 717 if (found) { 718 break; 719 } 720 } 721 if (!found) { 722 error_setg(errp, "Virtual channel subsystem is full!"); 723 goto out_err; 724 } 725 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 726 "auto-configured"); 727 } 728 729 /* Build initial schib. */ 730 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); 731 732 sch->ccw_cb = virtio_ccw_cb; 733 734 /* Build senseid data. */ 735 memset(&sch->id, 0, sizeof(SenseId)); 736 sch->id.reserved = 0xff; 737 sch->id.cu_type = VIRTIO_CCW_CU_TYPE; 738 sch->id.cu_model = vdev->device_id; 739 740 /* Only the first 32 feature bits are used. */ 741 dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus, 742 dev->host_features[0]); 743 744 virtio_add_feature(&dev->host_features[0], VIRTIO_F_NOTIFY_ON_EMPTY); 745 virtio_add_feature(&dev->host_features[0], VIRTIO_F_BAD_FEATURE); 746 747 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 748 parent->hotplugged, 1); 749 return; 750 751 out_err: 752 dev->sch = NULL; 753 g_free(sch); 754 } 755 756 static int virtio_ccw_exit(VirtioCcwDevice *dev) 757 { 758 SubchDev *sch = dev->sch; 759 760 if (sch) { 761 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 762 g_free(sch); 763 } 764 if (dev->indicators) { 765 release_indicator(&dev->routes.adapter, dev->indicators); 766 dev->indicators = NULL; 767 } 768 return 0; 769 } 770 771 static void virtio_ccw_net_realize(VirtioCcwDevice *ccw_dev, Error **errp) 772 { 773 DeviceState *qdev = DEVICE(ccw_dev); 774 VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev); 775 DeviceState *vdev = DEVICE(&dev->vdev); 776 Error *err = NULL; 777 778 virtio_net_set_config_size(&dev->vdev, ccw_dev->host_features[0]); 779 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 780 object_get_typename(OBJECT(qdev))); 781 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 782 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 783 if (err) { 784 error_propagate(errp, err); 785 return; 786 } 787 788 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 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 void virtio_ccw_blk_realize(VirtioCcwDevice *ccw_dev, Error **errp) 802 { 803 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev); 804 DeviceState *vdev = DEVICE(&dev->vdev); 805 Error *err = NULL; 806 807 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 808 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 809 if (err) { 810 error_propagate(errp, err); 811 return; 812 } 813 814 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 815 } 816 817 static void virtio_ccw_blk_instance_init(Object *obj) 818 { 819 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj); 820 821 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 822 TYPE_VIRTIO_BLK); 823 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread", 824 &error_abort); 825 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 826 "bootindex", &error_abort); 827 } 828 829 static void virtio_ccw_serial_realize(VirtioCcwDevice *ccw_dev, Error **errp) 830 { 831 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev); 832 DeviceState *vdev = DEVICE(&dev->vdev); 833 DeviceState *proxy = DEVICE(ccw_dev); 834 Error *err = NULL; 835 char *bus_name; 836 837 /* 838 * For command line compatibility, this sets the virtio-serial-device bus 839 * name as before. 840 */ 841 if (proxy->id) { 842 bus_name = g_strdup_printf("%s.0", proxy->id); 843 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 844 g_free(bus_name); 845 } 846 847 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 848 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 849 if (err) { 850 error_propagate(errp, err); 851 return; 852 } 853 854 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 855 } 856 857 858 static void virtio_ccw_serial_instance_init(Object *obj) 859 { 860 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj); 861 862 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 863 TYPE_VIRTIO_SERIAL); 864 } 865 866 static void virtio_ccw_balloon_realize(VirtioCcwDevice *ccw_dev, Error **errp) 867 { 868 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev); 869 DeviceState *vdev = DEVICE(&dev->vdev); 870 Error *err = NULL; 871 872 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 873 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 874 if (err) { 875 error_propagate(errp, err); 876 return; 877 } 878 879 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 880 } 881 882 static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v, 883 void *opaque, const char *name, 884 Error **errp) 885 { 886 VirtIOBalloonCcw *dev = opaque; 887 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); 888 } 889 890 static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v, 891 void *opaque, const char *name, 892 Error **errp) 893 { 894 VirtIOBalloonCcw *dev = opaque; 895 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 896 errp); 897 } 898 899 static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v, 900 void *opaque, const char *name, 901 Error **errp) 902 { 903 VirtIOBalloonCcw *dev = opaque; 904 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 905 errp); 906 } 907 908 static void virtio_ccw_balloon_instance_init(Object *obj) 909 { 910 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj); 911 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 912 TYPE_VIRTIO_BALLOON); 913 object_property_add(obj, "guest-stats", "guest statistics", 914 balloon_ccw_stats_get_all, NULL, NULL, dev, NULL); 915 916 object_property_add(obj, "guest-stats-polling-interval", "int", 917 balloon_ccw_stats_get_poll_interval, 918 balloon_ccw_stats_set_poll_interval, 919 NULL, dev, NULL); 920 } 921 922 static void virtio_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) 923 { 924 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev); 925 DeviceState *vdev = DEVICE(&dev->vdev); 926 DeviceState *qdev = DEVICE(ccw_dev); 927 Error *err = NULL; 928 char *bus_name; 929 930 /* 931 * For command line compatibility, this sets the virtio-scsi-device bus 932 * name as before. 933 */ 934 if (qdev->id) { 935 bus_name = g_strdup_printf("%s.0", qdev->id); 936 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 937 g_free(bus_name); 938 } 939 940 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 941 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 942 if (err) { 943 error_propagate(errp, err); 944 return; 945 } 946 947 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 948 } 949 950 static void virtio_ccw_scsi_instance_init(Object *obj) 951 { 952 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj); 953 954 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 955 TYPE_VIRTIO_SCSI); 956 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread", 957 &error_abort); 958 } 959 960 #ifdef CONFIG_VHOST_SCSI 961 static void vhost_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) 962 { 963 VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev); 964 DeviceState *vdev = DEVICE(&dev->vdev); 965 Error *err = NULL; 966 967 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 968 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 969 if (err) { 970 error_propagate(errp, err); 971 return; 972 } 973 974 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 975 } 976 977 static void vhost_ccw_scsi_instance_init(Object *obj) 978 { 979 VHostSCSICcw *dev = VHOST_SCSI_CCW(obj); 980 981 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 982 TYPE_VHOST_SCSI); 983 } 984 #endif 985 986 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp) 987 { 988 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev); 989 DeviceState *vdev = DEVICE(&dev->vdev); 990 Error *err = NULL; 991 992 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 993 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 994 if (err) { 995 error_propagate(errp, err); 996 return; 997 } 998 999 object_property_set_link(OBJECT(dev), 1000 OBJECT(dev->vdev.conf.rng), "rng", 1001 NULL); 1002 1003 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 1004 } 1005 1006 /* DeviceState to VirtioCcwDevice. Note: used on datapath, 1007 * be careful and test performance if you change this. 1008 */ 1009 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) 1010 { 1011 return container_of(d, VirtioCcwDevice, parent_obj); 1012 } 1013 1014 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, 1015 uint8_t to_be_set) 1016 { 1017 uint8_t ind_old, ind_new; 1018 hwaddr len = 1; 1019 uint8_t *ind_addr; 1020 1021 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 1022 if (!ind_addr) { 1023 error_report("%s(%x.%x.%04x): unable to access indicator", 1024 __func__, sch->cssid, sch->ssid, sch->schid); 1025 return -1; 1026 } 1027 do { 1028 ind_old = *ind_addr; 1029 ind_new = ind_old | to_be_set; 1030 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 1031 cpu_physical_memory_unmap(ind_addr, len, 1, len); 1032 1033 return ind_old; 1034 } 1035 1036 static void virtio_ccw_notify(DeviceState *d, uint16_t vector) 1037 { 1038 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); 1039 SubchDev *sch = dev->sch; 1040 uint64_t indicators; 1041 1042 if (vector >= 128) { 1043 return; 1044 } 1045 1046 if (vector < VIRTIO_PCI_QUEUE_MAX) { 1047 if (!dev->indicators) { 1048 return; 1049 } 1050 if (sch->thinint_active) { 1051 /* 1052 * In the adapter interrupt case, indicators points to a 1053 * memory area that may be (way) larger than 64 bit and 1054 * ind_bit indicates the start of the indicators in a big 1055 * endian notation. 1056 */ 1057 uint64_t ind_bit = dev->routes.adapter.ind_offset; 1058 1059 virtio_set_ind_atomic(sch, dev->indicators->addr + 1060 (ind_bit + vector) / 8, 1061 0x80 >> ((ind_bit + vector) % 8)); 1062 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr, 1063 0x01)) { 1064 css_adapter_interrupt(dev->thinint_isc); 1065 } 1066 } else { 1067 indicators = ldq_phys(&address_space_memory, dev->indicators->addr); 1068 indicators |= 1ULL << vector; 1069 stq_phys(&address_space_memory, dev->indicators->addr, indicators); 1070 css_conditional_io_interrupt(sch); 1071 } 1072 } else { 1073 if (!dev->indicators2) { 1074 return; 1075 } 1076 vector = 0; 1077 indicators = ldq_phys(&address_space_memory, dev->indicators2->addr); 1078 indicators |= 1ULL << vector; 1079 stq_phys(&address_space_memory, dev->indicators2->addr, indicators); 1080 css_conditional_io_interrupt(sch); 1081 } 1082 } 1083 1084 static unsigned virtio_ccw_get_features(DeviceState *d) 1085 { 1086 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1087 1088 /* Only the first 32 feature bits are used. */ 1089 return dev->host_features[0]; 1090 } 1091 1092 static void virtio_ccw_reset(DeviceState *d) 1093 { 1094 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1095 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1096 1097 virtio_ccw_stop_ioeventfd(dev); 1098 virtio_reset(vdev); 1099 css_reset_sch(dev->sch); 1100 if (dev->indicators) { 1101 release_indicator(&dev->routes.adapter, dev->indicators); 1102 dev->indicators = NULL; 1103 } 1104 if (dev->indicators2) { 1105 release_indicator(&dev->routes.adapter, dev->indicators2); 1106 dev->indicators2 = NULL; 1107 } 1108 if (dev->summary_indicator) { 1109 release_indicator(&dev->routes.adapter, dev->summary_indicator); 1110 dev->summary_indicator = NULL; 1111 } 1112 } 1113 1114 static void virtio_ccw_vmstate_change(DeviceState *d, bool running) 1115 { 1116 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1117 1118 if (running) { 1119 virtio_ccw_start_ioeventfd(dev); 1120 } else { 1121 virtio_ccw_stop_ioeventfd(dev); 1122 } 1123 } 1124 1125 static bool virtio_ccw_query_guest_notifiers(DeviceState *d) 1126 { 1127 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1128 1129 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA); 1130 } 1131 1132 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign) 1133 { 1134 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1135 1136 /* Stop using the generic ioeventfd, we are doing eventfd handling 1137 * ourselves below */ 1138 dev->ioeventfd_disabled = assign; 1139 if (assign) { 1140 virtio_ccw_stop_ioeventfd(dev); 1141 } 1142 return virtio_ccw_set_guest2host_notifier(dev, n, assign, false); 1143 } 1144 1145 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev) 1146 { 1147 int r; 1148 1149 if (!dev->sch->thinint_active) { 1150 return -EINVAL; 1151 } 1152 1153 r = map_indicator(&dev->routes.adapter, dev->summary_indicator); 1154 if (r) { 1155 return r; 1156 } 1157 r = map_indicator(&dev->routes.adapter, dev->indicators); 1158 if (r) { 1159 return r; 1160 } 1161 dev->routes.adapter.summary_addr = dev->summary_indicator->map; 1162 dev->routes.adapter.ind_addr = dev->indicators->map; 1163 1164 return 0; 1165 } 1166 1167 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs) 1168 { 1169 int i; 1170 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1171 int ret; 1172 S390FLICState *fs = s390_get_flic(); 1173 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1174 1175 ret = virtio_ccw_get_mappings(dev); 1176 if (ret) { 1177 return ret; 1178 } 1179 for (i = 0; i < nvqs; i++) { 1180 if (!virtio_queue_get_num(vdev, i)) { 1181 break; 1182 } 1183 } 1184 dev->routes.num_routes = i; 1185 return fsc->add_adapter_routes(fs, &dev->routes); 1186 } 1187 1188 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs) 1189 { 1190 S390FLICState *fs = s390_get_flic(); 1191 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1192 1193 fsc->release_adapter_routes(fs, &dev->routes); 1194 } 1195 1196 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n) 1197 { 1198 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1199 VirtQueue *vq = virtio_get_queue(vdev, n); 1200 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1201 1202 return kvm_irqchip_add_irqfd_notifier(kvm_state, notifier, NULL, 1203 dev->routes.gsi[n]); 1204 } 1205 1206 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n) 1207 { 1208 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1209 VirtQueue *vq = virtio_get_queue(vdev, n); 1210 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1211 int ret; 1212 1213 ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, notifier, 1214 dev->routes.gsi[n]); 1215 assert(ret == 0); 1216 } 1217 1218 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n, 1219 bool assign, bool with_irqfd) 1220 { 1221 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1222 VirtQueue *vq = virtio_get_queue(vdev, n); 1223 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1224 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 1225 1226 if (assign) { 1227 int r = event_notifier_init(notifier, 0); 1228 1229 if (r < 0) { 1230 return r; 1231 } 1232 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 1233 if (with_irqfd) { 1234 r = virtio_ccw_add_irqfd(dev, n); 1235 if (r) { 1236 virtio_queue_set_guest_notifier_fd_handler(vq, false, 1237 with_irqfd); 1238 return r; 1239 } 1240 } 1241 /* 1242 * We do not support individual masking for channel devices, so we 1243 * need to manually trigger any guest masking callbacks here. 1244 */ 1245 if (k->guest_notifier_mask) { 1246 k->guest_notifier_mask(vdev, n, false); 1247 } 1248 /* get lost events and re-inject */ 1249 if (k->guest_notifier_pending && 1250 k->guest_notifier_pending(vdev, n)) { 1251 event_notifier_set(notifier); 1252 } 1253 } else { 1254 if (k->guest_notifier_mask) { 1255 k->guest_notifier_mask(vdev, n, true); 1256 } 1257 if (with_irqfd) { 1258 virtio_ccw_remove_irqfd(dev, n); 1259 } 1260 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 1261 event_notifier_cleanup(notifier); 1262 } 1263 return 0; 1264 } 1265 1266 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs, 1267 bool assigned) 1268 { 1269 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1270 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1271 bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled(); 1272 int r, n; 1273 1274 if (with_irqfd && assigned) { 1275 /* irq routes need to be set up before assigning irqfds */ 1276 r = virtio_ccw_setup_irqroutes(dev, nvqs); 1277 if (r < 0) { 1278 goto irqroute_error; 1279 } 1280 } 1281 for (n = 0; n < nvqs; n++) { 1282 if (!virtio_queue_get_num(vdev, n)) { 1283 break; 1284 } 1285 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd); 1286 if (r < 0) { 1287 goto assign_error; 1288 } 1289 } 1290 if (with_irqfd && !assigned) { 1291 /* release irq routes after irqfds have been released */ 1292 virtio_ccw_release_irqroutes(dev, nvqs); 1293 } 1294 return 0; 1295 1296 assign_error: 1297 while (--n >= 0) { 1298 virtio_ccw_set_guest_notifier(dev, n, !assigned, false); 1299 } 1300 irqroute_error: 1301 if (with_irqfd && assigned) { 1302 virtio_ccw_release_irqroutes(dev, nvqs); 1303 } 1304 return r; 1305 } 1306 1307 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f) 1308 { 1309 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1310 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1311 1312 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 1313 } 1314 1315 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f) 1316 { 1317 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1318 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1319 uint16_t vector; 1320 1321 qemu_get_be16s(f, &vector); 1322 virtio_queue_set_vector(vdev, n , vector); 1323 1324 return 0; 1325 } 1326 1327 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) 1328 { 1329 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1330 SubchDev *s = dev->sch; 1331 1332 subch_device_save(s, f); 1333 if (dev->indicators != NULL) { 1334 qemu_put_be32(f, dev->indicators->len); 1335 qemu_put_be64(f, dev->indicators->addr); 1336 } else { 1337 qemu_put_be32(f, 0); 1338 qemu_put_be64(f, 0UL); 1339 } 1340 if (dev->indicators2 != NULL) { 1341 qemu_put_be32(f, dev->indicators2->len); 1342 qemu_put_be64(f, dev->indicators2->addr); 1343 } else { 1344 qemu_put_be32(f, 0); 1345 qemu_put_be64(f, 0UL); 1346 } 1347 if (dev->summary_indicator != NULL) { 1348 qemu_put_be32(f, dev->summary_indicator->len); 1349 qemu_put_be64(f, dev->summary_indicator->addr); 1350 } else { 1351 qemu_put_be32(f, 0); 1352 qemu_put_be64(f, 0UL); 1353 } 1354 qemu_put_be64(f, dev->routes.adapter.ind_offset); 1355 qemu_put_byte(f, dev->thinint_isc); 1356 } 1357 1358 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) 1359 { 1360 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1361 SubchDev *s = dev->sch; 1362 int len; 1363 1364 s->driver_data = dev; 1365 subch_device_load(s, f); 1366 len = qemu_get_be32(f); 1367 if (len != 0) { 1368 dev->indicators = get_indicator(qemu_get_be64(f), len); 1369 } else { 1370 qemu_get_be64(f); 1371 dev->indicators = NULL; 1372 } 1373 len = qemu_get_be32(f); 1374 if (len != 0) { 1375 dev->indicators2 = get_indicator(qemu_get_be64(f), len); 1376 } else { 1377 qemu_get_be64(f); 1378 dev->indicators2 = NULL; 1379 } 1380 len = qemu_get_be32(f); 1381 if (len != 0) { 1382 dev->summary_indicator = get_indicator(qemu_get_be64(f), len); 1383 } else { 1384 qemu_get_be64(f); 1385 dev->summary_indicator = NULL; 1386 } 1387 dev->routes.adapter.ind_offset = qemu_get_be64(f); 1388 dev->thinint_isc = qemu_get_byte(f); 1389 if (s->thinint_active) { 1390 return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 1391 dev->thinint_isc, true, false, 1392 &dev->routes.adapter.adapter_id); 1393 } 1394 1395 return 0; 1396 } 1397 1398 /**************** Virtio-ccw Bus Device Descriptions *******************/ 1399 1400 static Property virtio_ccw_net_properties[] = { 1401 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1402 DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]), 1403 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1404 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1405 DEFINE_PROP_END_OF_LIST(), 1406 }; 1407 1408 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data) 1409 { 1410 DeviceClass *dc = DEVICE_CLASS(klass); 1411 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1412 1413 k->realize = virtio_ccw_net_realize; 1414 k->exit = virtio_ccw_exit; 1415 dc->reset = virtio_ccw_reset; 1416 dc->props = virtio_ccw_net_properties; 1417 } 1418 1419 static const TypeInfo virtio_ccw_net = { 1420 .name = TYPE_VIRTIO_NET_CCW, 1421 .parent = TYPE_VIRTIO_CCW_DEVICE, 1422 .instance_size = sizeof(VirtIONetCcw), 1423 .instance_init = virtio_ccw_net_instance_init, 1424 .class_init = virtio_ccw_net_class_init, 1425 }; 1426 1427 static Property virtio_ccw_blk_properties[] = { 1428 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1429 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1430 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1431 DEFINE_PROP_END_OF_LIST(), 1432 }; 1433 1434 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data) 1435 { 1436 DeviceClass *dc = DEVICE_CLASS(klass); 1437 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1438 1439 k->realize = virtio_ccw_blk_realize; 1440 k->exit = virtio_ccw_exit; 1441 dc->reset = virtio_ccw_reset; 1442 dc->props = virtio_ccw_blk_properties; 1443 } 1444 1445 static const TypeInfo virtio_ccw_blk = { 1446 .name = TYPE_VIRTIO_BLK_CCW, 1447 .parent = TYPE_VIRTIO_CCW_DEVICE, 1448 .instance_size = sizeof(VirtIOBlkCcw), 1449 .instance_init = virtio_ccw_blk_instance_init, 1450 .class_init = virtio_ccw_blk_class_init, 1451 }; 1452 1453 static Property virtio_ccw_serial_properties[] = { 1454 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1455 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1456 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1457 DEFINE_PROP_END_OF_LIST(), 1458 }; 1459 1460 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data) 1461 { 1462 DeviceClass *dc = DEVICE_CLASS(klass); 1463 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1464 1465 k->realize = virtio_ccw_serial_realize; 1466 k->exit = virtio_ccw_exit; 1467 dc->reset = virtio_ccw_reset; 1468 dc->props = virtio_ccw_serial_properties; 1469 } 1470 1471 static const TypeInfo virtio_ccw_serial = { 1472 .name = TYPE_VIRTIO_SERIAL_CCW, 1473 .parent = TYPE_VIRTIO_CCW_DEVICE, 1474 .instance_size = sizeof(VirtioSerialCcw), 1475 .instance_init = virtio_ccw_serial_instance_init, 1476 .class_init = virtio_ccw_serial_class_init, 1477 }; 1478 1479 static Property virtio_ccw_balloon_properties[] = { 1480 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1481 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1482 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1483 DEFINE_PROP_END_OF_LIST(), 1484 }; 1485 1486 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data) 1487 { 1488 DeviceClass *dc = DEVICE_CLASS(klass); 1489 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1490 1491 k->realize = virtio_ccw_balloon_realize; 1492 k->exit = virtio_ccw_exit; 1493 dc->reset = virtio_ccw_reset; 1494 dc->props = virtio_ccw_balloon_properties; 1495 } 1496 1497 static const TypeInfo virtio_ccw_balloon = { 1498 .name = TYPE_VIRTIO_BALLOON_CCW, 1499 .parent = TYPE_VIRTIO_CCW_DEVICE, 1500 .instance_size = sizeof(VirtIOBalloonCcw), 1501 .instance_init = virtio_ccw_balloon_instance_init, 1502 .class_init = virtio_ccw_balloon_class_init, 1503 }; 1504 1505 static Property virtio_ccw_scsi_properties[] = { 1506 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1507 DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]), 1508 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1509 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1510 DEFINE_PROP_END_OF_LIST(), 1511 }; 1512 1513 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data) 1514 { 1515 DeviceClass *dc = DEVICE_CLASS(klass); 1516 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1517 1518 k->realize = virtio_ccw_scsi_realize; 1519 k->exit = virtio_ccw_exit; 1520 dc->reset = virtio_ccw_reset; 1521 dc->props = virtio_ccw_scsi_properties; 1522 } 1523 1524 static const TypeInfo virtio_ccw_scsi = { 1525 .name = TYPE_VIRTIO_SCSI_CCW, 1526 .parent = TYPE_VIRTIO_CCW_DEVICE, 1527 .instance_size = sizeof(VirtIOSCSICcw), 1528 .instance_init = virtio_ccw_scsi_instance_init, 1529 .class_init = virtio_ccw_scsi_class_init, 1530 }; 1531 1532 #ifdef CONFIG_VHOST_SCSI 1533 static Property vhost_ccw_scsi_properties[] = { 1534 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1535 DEFINE_PROP_END_OF_LIST(), 1536 }; 1537 1538 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data) 1539 { 1540 DeviceClass *dc = DEVICE_CLASS(klass); 1541 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1542 1543 k->realize = vhost_ccw_scsi_realize; 1544 k->exit = virtio_ccw_exit; 1545 dc->reset = virtio_ccw_reset; 1546 dc->props = vhost_ccw_scsi_properties; 1547 } 1548 1549 static const TypeInfo vhost_ccw_scsi = { 1550 .name = TYPE_VHOST_SCSI_CCW, 1551 .parent = TYPE_VIRTIO_CCW_DEVICE, 1552 .instance_size = sizeof(VHostSCSICcw), 1553 .instance_init = vhost_ccw_scsi_instance_init, 1554 .class_init = vhost_ccw_scsi_class_init, 1555 }; 1556 #endif 1557 1558 static void virtio_ccw_rng_instance_init(Object *obj) 1559 { 1560 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj); 1561 1562 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1563 TYPE_VIRTIO_RNG); 1564 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), 1565 "rng", &error_abort); 1566 } 1567 1568 static Property virtio_ccw_rng_properties[] = { 1569 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1570 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1571 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1572 DEFINE_PROP_END_OF_LIST(), 1573 }; 1574 1575 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data) 1576 { 1577 DeviceClass *dc = DEVICE_CLASS(klass); 1578 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1579 1580 k->realize = virtio_ccw_rng_realize; 1581 k->exit = virtio_ccw_exit; 1582 dc->reset = virtio_ccw_reset; 1583 dc->props = virtio_ccw_rng_properties; 1584 } 1585 1586 static const TypeInfo virtio_ccw_rng = { 1587 .name = TYPE_VIRTIO_RNG_CCW, 1588 .parent = TYPE_VIRTIO_CCW_DEVICE, 1589 .instance_size = sizeof(VirtIORNGCcw), 1590 .instance_init = virtio_ccw_rng_instance_init, 1591 .class_init = virtio_ccw_rng_class_init, 1592 }; 1593 1594 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp) 1595 { 1596 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1597 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1598 1599 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev); 1600 _info->realize(_dev, errp); 1601 } 1602 1603 static int virtio_ccw_busdev_exit(DeviceState *dev) 1604 { 1605 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1606 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1607 1608 return _info->exit(_dev); 1609 } 1610 1611 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev, 1612 DeviceState *dev, Error **errp) 1613 { 1614 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1615 SubchDev *sch = _dev->sch; 1616 1617 virtio_ccw_stop_ioeventfd(_dev); 1618 1619 /* 1620 * We should arrive here only for device_del, since we don't support 1621 * direct hot(un)plug of channels, but only through virtio. 1622 */ 1623 assert(sch != NULL); 1624 /* Subchannel is now disabled and no longer valid. */ 1625 sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA | 1626 PMCW_FLAGS_MASK_DNV); 1627 1628 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0); 1629 1630 object_unparent(OBJECT(dev)); 1631 } 1632 1633 static Property virtio_ccw_properties[] = { 1634 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]), 1635 DEFINE_PROP_END_OF_LIST(), 1636 }; 1637 1638 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) 1639 { 1640 DeviceClass *dc = DEVICE_CLASS(klass); 1641 1642 dc->props = virtio_ccw_properties; 1643 dc->realize = virtio_ccw_busdev_realize; 1644 dc->exit = virtio_ccw_busdev_exit; 1645 dc->bus_type = TYPE_VIRTUAL_CSS_BUS; 1646 } 1647 1648 static const TypeInfo virtio_ccw_device_info = { 1649 .name = TYPE_VIRTIO_CCW_DEVICE, 1650 .parent = TYPE_DEVICE, 1651 .instance_size = sizeof(VirtioCcwDevice), 1652 .class_init = virtio_ccw_device_class_init, 1653 .class_size = sizeof(VirtIOCCWDeviceClass), 1654 .abstract = true, 1655 }; 1656 1657 /***************** Virtual-css Bus Bridge Device ********************/ 1658 /* Only required to have the virtio bus as child in the system bus */ 1659 1660 static int virtual_css_bridge_init(SysBusDevice *dev) 1661 { 1662 /* nothing */ 1663 return 0; 1664 } 1665 1666 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data) 1667 { 1668 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 1669 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 1670 1671 k->init = virtual_css_bridge_init; 1672 hc->unplug = virtio_ccw_busdev_unplug; 1673 } 1674 1675 static const TypeInfo virtual_css_bridge_info = { 1676 .name = "virtual-css-bridge", 1677 .parent = TYPE_SYS_BUS_DEVICE, 1678 .instance_size = sizeof(SysBusDevice), 1679 .class_init = virtual_css_bridge_class_init, 1680 .interfaces = (InterfaceInfo[]) { 1681 { TYPE_HOTPLUG_HANDLER }, 1682 { } 1683 } 1684 }; 1685 1686 /* virtio-ccw-bus */ 1687 1688 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 1689 VirtioCcwDevice *dev) 1690 { 1691 DeviceState *qdev = DEVICE(dev); 1692 char virtio_bus_name[] = "virtio-bus"; 1693 1694 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS, 1695 qdev, virtio_bus_name); 1696 } 1697 1698 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data) 1699 { 1700 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1701 BusClass *bus_class = BUS_CLASS(klass); 1702 1703 bus_class->max_dev = 1; 1704 k->notify = virtio_ccw_notify; 1705 k->get_features = virtio_ccw_get_features; 1706 k->vmstate_change = virtio_ccw_vmstate_change; 1707 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers; 1708 k->set_host_notifier = virtio_ccw_set_host_notifier; 1709 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers; 1710 k->save_queue = virtio_ccw_save_queue; 1711 k->load_queue = virtio_ccw_load_queue; 1712 k->save_config = virtio_ccw_save_config; 1713 k->load_config = virtio_ccw_load_config; 1714 } 1715 1716 static const TypeInfo virtio_ccw_bus_info = { 1717 .name = TYPE_VIRTIO_CCW_BUS, 1718 .parent = TYPE_VIRTIO_BUS, 1719 .instance_size = sizeof(VirtioCcwBusState), 1720 .class_init = virtio_ccw_bus_class_init, 1721 }; 1722 1723 static void virtio_ccw_register(void) 1724 { 1725 type_register_static(&virtio_ccw_bus_info); 1726 type_register_static(&virtual_css_bus_info); 1727 type_register_static(&virtio_ccw_device_info); 1728 type_register_static(&virtio_ccw_serial); 1729 type_register_static(&virtio_ccw_blk); 1730 type_register_static(&virtio_ccw_net); 1731 type_register_static(&virtio_ccw_balloon); 1732 type_register_static(&virtio_ccw_scsi); 1733 #ifdef CONFIG_VHOST_SCSI 1734 type_register_static(&vhost_ccw_scsi); 1735 #endif 1736 type_register_static(&virtio_ccw_rng); 1737 type_register_static(&virtual_css_bridge_info); 1738 } 1739 1740 type_init(virtio_ccw_register) 1741