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 if (vq_config.index >= VIRTIO_PCI_QUEUE_MAX) { 553 ret = -EINVAL; 554 break; 555 } 556 vq_config.num_max = virtio_queue_get_num(vdev, 557 vq_config.index); 558 stw_be_phys(&address_space_memory, 559 ccw.cda + sizeof(vq_config.index), vq_config.num_max); 560 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config); 561 ret = 0; 562 } 563 break; 564 case CCW_CMD_SET_IND_ADAPTER: 565 if (check_len) { 566 if (ccw.count != sizeof(*thinint)) { 567 ret = -EINVAL; 568 break; 569 } 570 } else if (ccw.count < sizeof(*thinint)) { 571 /* Can't execute command. */ 572 ret = -EINVAL; 573 break; 574 } 575 len = sizeof(*thinint); 576 hw_len = len; 577 if (!ccw.cda) { 578 ret = -EFAULT; 579 } else if (dev->indicators && !sch->thinint_active) { 580 /* Trigger a command reject. */ 581 ret = -ENOSYS; 582 } else { 583 thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 584 if (!thinint) { 585 ret = -EFAULT; 586 } else { 587 uint64_t ind_bit = ldq_be_p(&thinint->ind_bit); 588 589 len = hw_len; 590 dev->summary_indicator = 591 get_indicator(ldq_be_p(&thinint->summary_indicator), 592 sizeof(uint8_t)); 593 dev->indicators = 594 get_indicator(ldq_be_p(&thinint->device_indicator), 595 ind_bit / 8 + 1); 596 dev->thinint_isc = thinint->isc; 597 dev->routes.adapter.ind_offset = ind_bit; 598 dev->routes.adapter.summary_offset = 7; 599 cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len); 600 ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 601 dev->thinint_isc, true, false, 602 &dev->routes.adapter.adapter_id); 603 assert(ret == 0); 604 sch->thinint_active = ((dev->indicators != NULL) && 605 (dev->summary_indicator != NULL)); 606 sch->curr_status.scsw.count = ccw.count - len; 607 ret = 0; 608 } 609 } 610 break; 611 default: 612 ret = -ENOSYS; 613 break; 614 } 615 return ret; 616 } 617 618 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, 619 VirtIODevice *vdev, Error **errp) 620 { 621 unsigned int cssid = 0; 622 unsigned int ssid = 0; 623 unsigned int schid; 624 unsigned int devno; 625 bool have_devno = false; 626 bool found = false; 627 SubchDev *sch; 628 int num; 629 DeviceState *parent = DEVICE(dev); 630 631 sch = g_malloc0(sizeof(SubchDev)); 632 633 sch->driver_data = dev; 634 dev->sch = sch; 635 636 dev->indicators = NULL; 637 638 /* Initialize subchannel structure. */ 639 sch->channel_prog = 0x0; 640 sch->last_cmd_valid = false; 641 sch->thinint_active = false; 642 /* 643 * Use a device number if provided. Otherwise, fall back to subchannel 644 * number. 645 */ 646 if (dev->bus_id) { 647 num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno); 648 if (num == 3) { 649 if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) { 650 error_setg(errp, "Invalid cssid or ssid: cssid %x, ssid %x", 651 cssid, ssid); 652 goto out_err; 653 } 654 /* Enforce use of virtual cssid. */ 655 if (cssid != VIRTUAL_CSSID) { 656 error_setg(errp, "cssid %x not valid for virtio devices", 657 cssid); 658 goto out_err; 659 } 660 if (css_devno_used(cssid, ssid, devno)) { 661 error_setg(errp, "Device %x.%x.%04x already exists", 662 cssid, ssid, devno); 663 goto out_err; 664 } 665 sch->cssid = cssid; 666 sch->ssid = ssid; 667 sch->devno = devno; 668 have_devno = true; 669 } else { 670 error_setg(errp, "Malformed devno parameter '%s'", dev->bus_id); 671 goto out_err; 672 } 673 } 674 675 /* Find the next free id. */ 676 if (have_devno) { 677 for (schid = 0; schid <= MAX_SCHID; schid++) { 678 if (!css_find_subch(1, cssid, ssid, schid)) { 679 sch->schid = schid; 680 css_subch_assign(cssid, ssid, schid, devno, sch); 681 found = true; 682 break; 683 } 684 } 685 if (!found) { 686 error_setg(errp, "No free subchannel found for %x.%x.%04x", 687 cssid, ssid, devno); 688 goto out_err; 689 } 690 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 691 "user-configured"); 692 } else { 693 cssid = VIRTUAL_CSSID; 694 for (ssid = 0; ssid <= MAX_SSID; ssid++) { 695 for (schid = 0; schid <= MAX_SCHID; schid++) { 696 if (!css_find_subch(1, cssid, ssid, schid)) { 697 sch->cssid = cssid; 698 sch->ssid = ssid; 699 sch->schid = schid; 700 devno = schid; 701 /* 702 * If the devno is already taken, look further in this 703 * subchannel set. 704 */ 705 while (css_devno_used(cssid, ssid, devno)) { 706 if (devno == MAX_SCHID) { 707 devno = 0; 708 } else if (devno == schid - 1) { 709 error_setg(errp, "No free devno found"); 710 goto out_err; 711 } else { 712 devno++; 713 } 714 } 715 sch->devno = devno; 716 css_subch_assign(cssid, ssid, schid, devno, sch); 717 found = true; 718 break; 719 } 720 } 721 if (found) { 722 break; 723 } 724 } 725 if (!found) { 726 error_setg(errp, "Virtual channel subsystem is full!"); 727 goto out_err; 728 } 729 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 730 "auto-configured"); 731 } 732 733 /* Build initial schib. */ 734 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); 735 736 sch->ccw_cb = virtio_ccw_cb; 737 738 /* Build senseid data. */ 739 memset(&sch->id, 0, sizeof(SenseId)); 740 sch->id.reserved = 0xff; 741 sch->id.cu_type = VIRTIO_CCW_CU_TYPE; 742 sch->id.cu_model = vdev->device_id; 743 744 /* Only the first 32 feature bits are used. */ 745 dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus, 746 dev->host_features[0]); 747 748 virtio_add_feature(&dev->host_features[0], VIRTIO_F_NOTIFY_ON_EMPTY); 749 virtio_add_feature(&dev->host_features[0], VIRTIO_F_BAD_FEATURE); 750 751 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 752 parent->hotplugged, 1); 753 return; 754 755 out_err: 756 dev->sch = NULL; 757 g_free(sch); 758 } 759 760 static int virtio_ccw_exit(VirtioCcwDevice *dev) 761 { 762 SubchDev *sch = dev->sch; 763 764 if (sch) { 765 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 766 g_free(sch); 767 } 768 if (dev->indicators) { 769 release_indicator(&dev->routes.adapter, dev->indicators); 770 dev->indicators = NULL; 771 } 772 return 0; 773 } 774 775 static void virtio_ccw_net_realize(VirtioCcwDevice *ccw_dev, Error **errp) 776 { 777 DeviceState *qdev = DEVICE(ccw_dev); 778 VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev); 779 DeviceState *vdev = DEVICE(&dev->vdev); 780 Error *err = NULL; 781 782 virtio_net_set_config_size(&dev->vdev, ccw_dev->host_features[0]); 783 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 784 object_get_typename(OBJECT(qdev))); 785 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 786 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 787 if (err) { 788 error_propagate(errp, err); 789 return; 790 } 791 792 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 793 } 794 795 static void virtio_ccw_net_instance_init(Object *obj) 796 { 797 VirtIONetCcw *dev = VIRTIO_NET_CCW(obj); 798 799 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 800 TYPE_VIRTIO_NET); 801 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 802 "bootindex", &error_abort); 803 } 804 805 static void virtio_ccw_blk_realize(VirtioCcwDevice *ccw_dev, Error **errp) 806 { 807 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev); 808 DeviceState *vdev = DEVICE(&dev->vdev); 809 Error *err = NULL; 810 811 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 812 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 813 if (err) { 814 error_propagate(errp, err); 815 return; 816 } 817 818 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 819 } 820 821 static void virtio_ccw_blk_instance_init(Object *obj) 822 { 823 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj); 824 825 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 826 TYPE_VIRTIO_BLK); 827 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread", 828 &error_abort); 829 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 830 "bootindex", &error_abort); 831 } 832 833 static void virtio_ccw_serial_realize(VirtioCcwDevice *ccw_dev, Error **errp) 834 { 835 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev); 836 DeviceState *vdev = DEVICE(&dev->vdev); 837 DeviceState *proxy = DEVICE(ccw_dev); 838 Error *err = NULL; 839 char *bus_name; 840 841 /* 842 * For command line compatibility, this sets the virtio-serial-device bus 843 * name as before. 844 */ 845 if (proxy->id) { 846 bus_name = g_strdup_printf("%s.0", proxy->id); 847 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 848 g_free(bus_name); 849 } 850 851 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 852 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 853 if (err) { 854 error_propagate(errp, err); 855 return; 856 } 857 858 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 859 } 860 861 862 static void virtio_ccw_serial_instance_init(Object *obj) 863 { 864 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj); 865 866 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 867 TYPE_VIRTIO_SERIAL); 868 } 869 870 static void virtio_ccw_balloon_realize(VirtioCcwDevice *ccw_dev, Error **errp) 871 { 872 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev); 873 DeviceState *vdev = DEVICE(&dev->vdev); 874 Error *err = NULL; 875 876 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 877 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 878 if (err) { 879 error_propagate(errp, err); 880 return; 881 } 882 883 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 884 } 885 886 static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v, 887 void *opaque, const char *name, 888 Error **errp) 889 { 890 VirtIOBalloonCcw *dev = opaque; 891 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); 892 } 893 894 static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v, 895 void *opaque, const char *name, 896 Error **errp) 897 { 898 VirtIOBalloonCcw *dev = opaque; 899 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 900 errp); 901 } 902 903 static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v, 904 void *opaque, const char *name, 905 Error **errp) 906 { 907 VirtIOBalloonCcw *dev = opaque; 908 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 909 errp); 910 } 911 912 static void virtio_ccw_balloon_instance_init(Object *obj) 913 { 914 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj); 915 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 916 TYPE_VIRTIO_BALLOON); 917 object_property_add(obj, "guest-stats", "guest statistics", 918 balloon_ccw_stats_get_all, NULL, NULL, dev, NULL); 919 920 object_property_add(obj, "guest-stats-polling-interval", "int", 921 balloon_ccw_stats_get_poll_interval, 922 balloon_ccw_stats_set_poll_interval, 923 NULL, dev, NULL); 924 } 925 926 static void virtio_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) 927 { 928 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev); 929 DeviceState *vdev = DEVICE(&dev->vdev); 930 DeviceState *qdev = DEVICE(ccw_dev); 931 Error *err = NULL; 932 char *bus_name; 933 934 /* 935 * For command line compatibility, this sets the virtio-scsi-device bus 936 * name as before. 937 */ 938 if (qdev->id) { 939 bus_name = g_strdup_printf("%s.0", qdev->id); 940 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 941 g_free(bus_name); 942 } 943 944 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 945 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 946 if (err) { 947 error_propagate(errp, err); 948 return; 949 } 950 951 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 952 } 953 954 static void virtio_ccw_scsi_instance_init(Object *obj) 955 { 956 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj); 957 958 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 959 TYPE_VIRTIO_SCSI); 960 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread", 961 &error_abort); 962 } 963 964 #ifdef CONFIG_VHOST_SCSI 965 static void vhost_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) 966 { 967 VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev); 968 DeviceState *vdev = DEVICE(&dev->vdev); 969 Error *err = NULL; 970 971 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 972 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 973 if (err) { 974 error_propagate(errp, err); 975 return; 976 } 977 978 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 979 } 980 981 static void vhost_ccw_scsi_instance_init(Object *obj) 982 { 983 VHostSCSICcw *dev = VHOST_SCSI_CCW(obj); 984 985 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 986 TYPE_VHOST_SCSI); 987 } 988 #endif 989 990 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp) 991 { 992 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev); 993 DeviceState *vdev = DEVICE(&dev->vdev); 994 Error *err = NULL; 995 996 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 997 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 998 if (err) { 999 error_propagate(errp, err); 1000 return; 1001 } 1002 1003 object_property_set_link(OBJECT(dev), 1004 OBJECT(dev->vdev.conf.rng), "rng", 1005 NULL); 1006 1007 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 1008 } 1009 1010 /* DeviceState to VirtioCcwDevice. Note: used on datapath, 1011 * be careful and test performance if you change this. 1012 */ 1013 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) 1014 { 1015 return container_of(d, VirtioCcwDevice, parent_obj); 1016 } 1017 1018 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, 1019 uint8_t to_be_set) 1020 { 1021 uint8_t ind_old, ind_new; 1022 hwaddr len = 1; 1023 uint8_t *ind_addr; 1024 1025 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 1026 if (!ind_addr) { 1027 error_report("%s(%x.%x.%04x): unable to access indicator", 1028 __func__, sch->cssid, sch->ssid, sch->schid); 1029 return -1; 1030 } 1031 do { 1032 ind_old = *ind_addr; 1033 ind_new = ind_old | to_be_set; 1034 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 1035 cpu_physical_memory_unmap(ind_addr, len, 1, len); 1036 1037 return ind_old; 1038 } 1039 1040 static void virtio_ccw_notify(DeviceState *d, uint16_t vector) 1041 { 1042 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); 1043 SubchDev *sch = dev->sch; 1044 uint64_t indicators; 1045 1046 if (vector >= 128) { 1047 return; 1048 } 1049 1050 if (vector < VIRTIO_PCI_QUEUE_MAX) { 1051 if (!dev->indicators) { 1052 return; 1053 } 1054 if (sch->thinint_active) { 1055 /* 1056 * In the adapter interrupt case, indicators points to a 1057 * memory area that may be (way) larger than 64 bit and 1058 * ind_bit indicates the start of the indicators in a big 1059 * endian notation. 1060 */ 1061 uint64_t ind_bit = dev->routes.adapter.ind_offset; 1062 1063 virtio_set_ind_atomic(sch, dev->indicators->addr + 1064 (ind_bit + vector) / 8, 1065 0x80 >> ((ind_bit + vector) % 8)); 1066 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr, 1067 0x01)) { 1068 css_adapter_interrupt(dev->thinint_isc); 1069 } 1070 } else { 1071 indicators = ldq_phys(&address_space_memory, dev->indicators->addr); 1072 indicators |= 1ULL << vector; 1073 stq_phys(&address_space_memory, dev->indicators->addr, indicators); 1074 css_conditional_io_interrupt(sch); 1075 } 1076 } else { 1077 if (!dev->indicators2) { 1078 return; 1079 } 1080 vector = 0; 1081 indicators = ldq_phys(&address_space_memory, dev->indicators2->addr); 1082 indicators |= 1ULL << vector; 1083 stq_phys(&address_space_memory, dev->indicators2->addr, indicators); 1084 css_conditional_io_interrupt(sch); 1085 } 1086 } 1087 1088 static unsigned virtio_ccw_get_features(DeviceState *d) 1089 { 1090 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1091 1092 /* Only the first 32 feature bits are used. */ 1093 return dev->host_features[0]; 1094 } 1095 1096 static void virtio_ccw_reset(DeviceState *d) 1097 { 1098 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1099 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1100 1101 virtio_ccw_stop_ioeventfd(dev); 1102 virtio_reset(vdev); 1103 css_reset_sch(dev->sch); 1104 if (dev->indicators) { 1105 release_indicator(&dev->routes.adapter, dev->indicators); 1106 dev->indicators = NULL; 1107 } 1108 if (dev->indicators2) { 1109 release_indicator(&dev->routes.adapter, dev->indicators2); 1110 dev->indicators2 = NULL; 1111 } 1112 if (dev->summary_indicator) { 1113 release_indicator(&dev->routes.adapter, dev->summary_indicator); 1114 dev->summary_indicator = NULL; 1115 } 1116 } 1117 1118 static void virtio_ccw_vmstate_change(DeviceState *d, bool running) 1119 { 1120 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1121 1122 if (running) { 1123 virtio_ccw_start_ioeventfd(dev); 1124 } else { 1125 virtio_ccw_stop_ioeventfd(dev); 1126 } 1127 } 1128 1129 static bool virtio_ccw_query_guest_notifiers(DeviceState *d) 1130 { 1131 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1132 1133 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA); 1134 } 1135 1136 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign) 1137 { 1138 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1139 1140 /* Stop using the generic ioeventfd, we are doing eventfd handling 1141 * ourselves below */ 1142 dev->ioeventfd_disabled = assign; 1143 if (assign) { 1144 virtio_ccw_stop_ioeventfd(dev); 1145 } 1146 return virtio_ccw_set_guest2host_notifier(dev, n, assign, false); 1147 } 1148 1149 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev) 1150 { 1151 int r; 1152 1153 if (!dev->sch->thinint_active) { 1154 return -EINVAL; 1155 } 1156 1157 r = map_indicator(&dev->routes.adapter, dev->summary_indicator); 1158 if (r) { 1159 return r; 1160 } 1161 r = map_indicator(&dev->routes.adapter, dev->indicators); 1162 if (r) { 1163 return r; 1164 } 1165 dev->routes.adapter.summary_addr = dev->summary_indicator->map; 1166 dev->routes.adapter.ind_addr = dev->indicators->map; 1167 1168 return 0; 1169 } 1170 1171 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs) 1172 { 1173 int i; 1174 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1175 int ret; 1176 S390FLICState *fs = s390_get_flic(); 1177 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1178 1179 ret = virtio_ccw_get_mappings(dev); 1180 if (ret) { 1181 return ret; 1182 } 1183 for (i = 0; i < nvqs; i++) { 1184 if (!virtio_queue_get_num(vdev, i)) { 1185 break; 1186 } 1187 } 1188 dev->routes.num_routes = i; 1189 return fsc->add_adapter_routes(fs, &dev->routes); 1190 } 1191 1192 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs) 1193 { 1194 S390FLICState *fs = s390_get_flic(); 1195 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1196 1197 fsc->release_adapter_routes(fs, &dev->routes); 1198 } 1199 1200 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n) 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 1206 return kvm_irqchip_add_irqfd_notifier(kvm_state, notifier, NULL, 1207 dev->routes.gsi[n]); 1208 } 1209 1210 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n) 1211 { 1212 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1213 VirtQueue *vq = virtio_get_queue(vdev, n); 1214 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1215 int ret; 1216 1217 ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, notifier, 1218 dev->routes.gsi[n]); 1219 assert(ret == 0); 1220 } 1221 1222 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n, 1223 bool assign, bool with_irqfd) 1224 { 1225 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1226 VirtQueue *vq = virtio_get_queue(vdev, n); 1227 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1228 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 1229 1230 if (assign) { 1231 int r = event_notifier_init(notifier, 0); 1232 1233 if (r < 0) { 1234 return r; 1235 } 1236 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 1237 if (with_irqfd) { 1238 r = virtio_ccw_add_irqfd(dev, n); 1239 if (r) { 1240 virtio_queue_set_guest_notifier_fd_handler(vq, false, 1241 with_irqfd); 1242 return r; 1243 } 1244 } 1245 /* 1246 * We do not support individual masking for channel devices, so we 1247 * need to manually trigger any guest masking callbacks here. 1248 */ 1249 if (k->guest_notifier_mask) { 1250 k->guest_notifier_mask(vdev, n, false); 1251 } 1252 /* get lost events and re-inject */ 1253 if (k->guest_notifier_pending && 1254 k->guest_notifier_pending(vdev, n)) { 1255 event_notifier_set(notifier); 1256 } 1257 } else { 1258 if (k->guest_notifier_mask) { 1259 k->guest_notifier_mask(vdev, n, true); 1260 } 1261 if (with_irqfd) { 1262 virtio_ccw_remove_irqfd(dev, n); 1263 } 1264 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 1265 event_notifier_cleanup(notifier); 1266 } 1267 return 0; 1268 } 1269 1270 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs, 1271 bool assigned) 1272 { 1273 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1274 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1275 bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled(); 1276 int r, n; 1277 1278 if (with_irqfd && assigned) { 1279 /* irq routes need to be set up before assigning irqfds */ 1280 r = virtio_ccw_setup_irqroutes(dev, nvqs); 1281 if (r < 0) { 1282 goto irqroute_error; 1283 } 1284 } 1285 for (n = 0; n < nvqs; n++) { 1286 if (!virtio_queue_get_num(vdev, n)) { 1287 break; 1288 } 1289 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd); 1290 if (r < 0) { 1291 goto assign_error; 1292 } 1293 } 1294 if (with_irqfd && !assigned) { 1295 /* release irq routes after irqfds have been released */ 1296 virtio_ccw_release_irqroutes(dev, nvqs); 1297 } 1298 return 0; 1299 1300 assign_error: 1301 while (--n >= 0) { 1302 virtio_ccw_set_guest_notifier(dev, n, !assigned, false); 1303 } 1304 irqroute_error: 1305 if (with_irqfd && assigned) { 1306 virtio_ccw_release_irqroutes(dev, nvqs); 1307 } 1308 return r; 1309 } 1310 1311 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f) 1312 { 1313 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1314 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1315 1316 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 1317 } 1318 1319 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f) 1320 { 1321 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1322 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1323 uint16_t vector; 1324 1325 qemu_get_be16s(f, &vector); 1326 virtio_queue_set_vector(vdev, n , vector); 1327 1328 return 0; 1329 } 1330 1331 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) 1332 { 1333 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1334 SubchDev *s = dev->sch; 1335 1336 subch_device_save(s, f); 1337 if (dev->indicators != NULL) { 1338 qemu_put_be32(f, dev->indicators->len); 1339 qemu_put_be64(f, dev->indicators->addr); 1340 } else { 1341 qemu_put_be32(f, 0); 1342 qemu_put_be64(f, 0UL); 1343 } 1344 if (dev->indicators2 != NULL) { 1345 qemu_put_be32(f, dev->indicators2->len); 1346 qemu_put_be64(f, dev->indicators2->addr); 1347 } else { 1348 qemu_put_be32(f, 0); 1349 qemu_put_be64(f, 0UL); 1350 } 1351 if (dev->summary_indicator != NULL) { 1352 qemu_put_be32(f, dev->summary_indicator->len); 1353 qemu_put_be64(f, dev->summary_indicator->addr); 1354 } else { 1355 qemu_put_be32(f, 0); 1356 qemu_put_be64(f, 0UL); 1357 } 1358 qemu_put_be64(f, dev->routes.adapter.ind_offset); 1359 qemu_put_byte(f, dev->thinint_isc); 1360 } 1361 1362 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) 1363 { 1364 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1365 SubchDev *s = dev->sch; 1366 int len; 1367 1368 s->driver_data = dev; 1369 subch_device_load(s, f); 1370 len = qemu_get_be32(f); 1371 if (len != 0) { 1372 dev->indicators = get_indicator(qemu_get_be64(f), len); 1373 } else { 1374 qemu_get_be64(f); 1375 dev->indicators = NULL; 1376 } 1377 len = qemu_get_be32(f); 1378 if (len != 0) { 1379 dev->indicators2 = get_indicator(qemu_get_be64(f), len); 1380 } else { 1381 qemu_get_be64(f); 1382 dev->indicators2 = NULL; 1383 } 1384 len = qemu_get_be32(f); 1385 if (len != 0) { 1386 dev->summary_indicator = get_indicator(qemu_get_be64(f), len); 1387 } else { 1388 qemu_get_be64(f); 1389 dev->summary_indicator = NULL; 1390 } 1391 dev->routes.adapter.ind_offset = qemu_get_be64(f); 1392 dev->thinint_isc = qemu_get_byte(f); 1393 if (s->thinint_active) { 1394 return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 1395 dev->thinint_isc, true, false, 1396 &dev->routes.adapter.adapter_id); 1397 } 1398 1399 return 0; 1400 } 1401 1402 /**************** Virtio-ccw Bus Device Descriptions *******************/ 1403 1404 static Property virtio_ccw_net_properties[] = { 1405 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1406 DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]), 1407 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1408 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1409 DEFINE_PROP_END_OF_LIST(), 1410 }; 1411 1412 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data) 1413 { 1414 DeviceClass *dc = DEVICE_CLASS(klass); 1415 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1416 1417 k->realize = virtio_ccw_net_realize; 1418 k->exit = virtio_ccw_exit; 1419 dc->reset = virtio_ccw_reset; 1420 dc->props = virtio_ccw_net_properties; 1421 } 1422 1423 static const TypeInfo virtio_ccw_net = { 1424 .name = TYPE_VIRTIO_NET_CCW, 1425 .parent = TYPE_VIRTIO_CCW_DEVICE, 1426 .instance_size = sizeof(VirtIONetCcw), 1427 .instance_init = virtio_ccw_net_instance_init, 1428 .class_init = virtio_ccw_net_class_init, 1429 }; 1430 1431 static Property virtio_ccw_blk_properties[] = { 1432 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1433 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1434 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1435 DEFINE_PROP_END_OF_LIST(), 1436 }; 1437 1438 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data) 1439 { 1440 DeviceClass *dc = DEVICE_CLASS(klass); 1441 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1442 1443 k->realize = virtio_ccw_blk_realize; 1444 k->exit = virtio_ccw_exit; 1445 dc->reset = virtio_ccw_reset; 1446 dc->props = virtio_ccw_blk_properties; 1447 } 1448 1449 static const TypeInfo virtio_ccw_blk = { 1450 .name = TYPE_VIRTIO_BLK_CCW, 1451 .parent = TYPE_VIRTIO_CCW_DEVICE, 1452 .instance_size = sizeof(VirtIOBlkCcw), 1453 .instance_init = virtio_ccw_blk_instance_init, 1454 .class_init = virtio_ccw_blk_class_init, 1455 }; 1456 1457 static Property virtio_ccw_serial_properties[] = { 1458 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1459 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1460 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1461 DEFINE_PROP_END_OF_LIST(), 1462 }; 1463 1464 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data) 1465 { 1466 DeviceClass *dc = DEVICE_CLASS(klass); 1467 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1468 1469 k->realize = virtio_ccw_serial_realize; 1470 k->exit = virtio_ccw_exit; 1471 dc->reset = virtio_ccw_reset; 1472 dc->props = virtio_ccw_serial_properties; 1473 } 1474 1475 static const TypeInfo virtio_ccw_serial = { 1476 .name = TYPE_VIRTIO_SERIAL_CCW, 1477 .parent = TYPE_VIRTIO_CCW_DEVICE, 1478 .instance_size = sizeof(VirtioSerialCcw), 1479 .instance_init = virtio_ccw_serial_instance_init, 1480 .class_init = virtio_ccw_serial_class_init, 1481 }; 1482 1483 static Property virtio_ccw_balloon_properties[] = { 1484 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1485 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1486 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1487 DEFINE_PROP_END_OF_LIST(), 1488 }; 1489 1490 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data) 1491 { 1492 DeviceClass *dc = DEVICE_CLASS(klass); 1493 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1494 1495 k->realize = virtio_ccw_balloon_realize; 1496 k->exit = virtio_ccw_exit; 1497 dc->reset = virtio_ccw_reset; 1498 dc->props = virtio_ccw_balloon_properties; 1499 } 1500 1501 static const TypeInfo virtio_ccw_balloon = { 1502 .name = TYPE_VIRTIO_BALLOON_CCW, 1503 .parent = TYPE_VIRTIO_CCW_DEVICE, 1504 .instance_size = sizeof(VirtIOBalloonCcw), 1505 .instance_init = virtio_ccw_balloon_instance_init, 1506 .class_init = virtio_ccw_balloon_class_init, 1507 }; 1508 1509 static Property virtio_ccw_scsi_properties[] = { 1510 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1511 DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]), 1512 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1513 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1514 DEFINE_PROP_END_OF_LIST(), 1515 }; 1516 1517 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data) 1518 { 1519 DeviceClass *dc = DEVICE_CLASS(klass); 1520 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1521 1522 k->realize = virtio_ccw_scsi_realize; 1523 k->exit = virtio_ccw_exit; 1524 dc->reset = virtio_ccw_reset; 1525 dc->props = virtio_ccw_scsi_properties; 1526 } 1527 1528 static const TypeInfo virtio_ccw_scsi = { 1529 .name = TYPE_VIRTIO_SCSI_CCW, 1530 .parent = TYPE_VIRTIO_CCW_DEVICE, 1531 .instance_size = sizeof(VirtIOSCSICcw), 1532 .instance_init = virtio_ccw_scsi_instance_init, 1533 .class_init = virtio_ccw_scsi_class_init, 1534 }; 1535 1536 #ifdef CONFIG_VHOST_SCSI 1537 static Property vhost_ccw_scsi_properties[] = { 1538 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1539 DEFINE_PROP_END_OF_LIST(), 1540 }; 1541 1542 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data) 1543 { 1544 DeviceClass *dc = DEVICE_CLASS(klass); 1545 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1546 1547 k->realize = vhost_ccw_scsi_realize; 1548 k->exit = virtio_ccw_exit; 1549 dc->reset = virtio_ccw_reset; 1550 dc->props = vhost_ccw_scsi_properties; 1551 } 1552 1553 static const TypeInfo vhost_ccw_scsi = { 1554 .name = TYPE_VHOST_SCSI_CCW, 1555 .parent = TYPE_VIRTIO_CCW_DEVICE, 1556 .instance_size = sizeof(VHostSCSICcw), 1557 .instance_init = vhost_ccw_scsi_instance_init, 1558 .class_init = vhost_ccw_scsi_class_init, 1559 }; 1560 #endif 1561 1562 static void virtio_ccw_rng_instance_init(Object *obj) 1563 { 1564 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj); 1565 1566 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1567 TYPE_VIRTIO_RNG); 1568 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), 1569 "rng", &error_abort); 1570 } 1571 1572 static Property virtio_ccw_rng_properties[] = { 1573 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1574 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1575 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1576 DEFINE_PROP_END_OF_LIST(), 1577 }; 1578 1579 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data) 1580 { 1581 DeviceClass *dc = DEVICE_CLASS(klass); 1582 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1583 1584 k->realize = virtio_ccw_rng_realize; 1585 k->exit = virtio_ccw_exit; 1586 dc->reset = virtio_ccw_reset; 1587 dc->props = virtio_ccw_rng_properties; 1588 } 1589 1590 static const TypeInfo virtio_ccw_rng = { 1591 .name = TYPE_VIRTIO_RNG_CCW, 1592 .parent = TYPE_VIRTIO_CCW_DEVICE, 1593 .instance_size = sizeof(VirtIORNGCcw), 1594 .instance_init = virtio_ccw_rng_instance_init, 1595 .class_init = virtio_ccw_rng_class_init, 1596 }; 1597 1598 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp) 1599 { 1600 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1601 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1602 1603 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev); 1604 _info->realize(_dev, errp); 1605 } 1606 1607 static int virtio_ccw_busdev_exit(DeviceState *dev) 1608 { 1609 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1610 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1611 1612 return _info->exit(_dev); 1613 } 1614 1615 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev, 1616 DeviceState *dev, Error **errp) 1617 { 1618 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1619 SubchDev *sch = _dev->sch; 1620 1621 virtio_ccw_stop_ioeventfd(_dev); 1622 1623 /* 1624 * We should arrive here only for device_del, since we don't support 1625 * direct hot(un)plug of channels, but only through virtio. 1626 */ 1627 assert(sch != NULL); 1628 /* Subchannel is now disabled and no longer valid. */ 1629 sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA | 1630 PMCW_FLAGS_MASK_DNV); 1631 1632 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0); 1633 1634 object_unparent(OBJECT(dev)); 1635 } 1636 1637 static Property virtio_ccw_properties[] = { 1638 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]), 1639 DEFINE_PROP_END_OF_LIST(), 1640 }; 1641 1642 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) 1643 { 1644 DeviceClass *dc = DEVICE_CLASS(klass); 1645 1646 dc->props = virtio_ccw_properties; 1647 dc->realize = virtio_ccw_busdev_realize; 1648 dc->exit = virtio_ccw_busdev_exit; 1649 dc->bus_type = TYPE_VIRTUAL_CSS_BUS; 1650 } 1651 1652 static const TypeInfo virtio_ccw_device_info = { 1653 .name = TYPE_VIRTIO_CCW_DEVICE, 1654 .parent = TYPE_DEVICE, 1655 .instance_size = sizeof(VirtioCcwDevice), 1656 .class_init = virtio_ccw_device_class_init, 1657 .class_size = sizeof(VirtIOCCWDeviceClass), 1658 .abstract = true, 1659 }; 1660 1661 /***************** Virtual-css Bus Bridge Device ********************/ 1662 /* Only required to have the virtio bus as child in the system bus */ 1663 1664 static int virtual_css_bridge_init(SysBusDevice *dev) 1665 { 1666 /* nothing */ 1667 return 0; 1668 } 1669 1670 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data) 1671 { 1672 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 1673 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 1674 1675 k->init = virtual_css_bridge_init; 1676 hc->unplug = virtio_ccw_busdev_unplug; 1677 } 1678 1679 static const TypeInfo virtual_css_bridge_info = { 1680 .name = "virtual-css-bridge", 1681 .parent = TYPE_SYS_BUS_DEVICE, 1682 .instance_size = sizeof(SysBusDevice), 1683 .class_init = virtual_css_bridge_class_init, 1684 .interfaces = (InterfaceInfo[]) { 1685 { TYPE_HOTPLUG_HANDLER }, 1686 { } 1687 } 1688 }; 1689 1690 /* virtio-ccw-bus */ 1691 1692 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 1693 VirtioCcwDevice *dev) 1694 { 1695 DeviceState *qdev = DEVICE(dev); 1696 char virtio_bus_name[] = "virtio-bus"; 1697 1698 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS, 1699 qdev, virtio_bus_name); 1700 } 1701 1702 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data) 1703 { 1704 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1705 BusClass *bus_class = BUS_CLASS(klass); 1706 1707 bus_class->max_dev = 1; 1708 k->notify = virtio_ccw_notify; 1709 k->get_features = virtio_ccw_get_features; 1710 k->vmstate_change = virtio_ccw_vmstate_change; 1711 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers; 1712 k->set_host_notifier = virtio_ccw_set_host_notifier; 1713 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers; 1714 k->save_queue = virtio_ccw_save_queue; 1715 k->load_queue = virtio_ccw_load_queue; 1716 k->save_config = virtio_ccw_save_config; 1717 k->load_config = virtio_ccw_load_config; 1718 } 1719 1720 static const TypeInfo virtio_ccw_bus_info = { 1721 .name = TYPE_VIRTIO_CCW_BUS, 1722 .parent = TYPE_VIRTIO_BUS, 1723 .instance_size = sizeof(VirtioCcwBusState), 1724 .class_init = virtio_ccw_bus_class_init, 1725 }; 1726 1727 static void virtio_ccw_register(void) 1728 { 1729 type_register_static(&virtio_ccw_bus_info); 1730 type_register_static(&virtual_css_bus_info); 1731 type_register_static(&virtio_ccw_device_info); 1732 type_register_static(&virtio_ccw_serial); 1733 type_register_static(&virtio_ccw_blk); 1734 type_register_static(&virtio_ccw_net); 1735 type_register_static(&virtio_ccw_balloon); 1736 type_register_static(&virtio_ccw_scsi); 1737 #ifdef CONFIG_VHOST_SCSI 1738 type_register_static(&vhost_ccw_scsi); 1739 #endif 1740 type_register_static(&virtio_ccw_rng); 1741 type_register_static(&virtual_css_bridge_info); 1742 } 1743 1744 type_init(virtio_ccw_register) 1745