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_bus_set_vdev_features(&dev->bus, features.features); 404 vdev->guest_features = features.features; 405 } else { 406 /* 407 * If the guest supports more feature bits, assert that it 408 * passes us zeroes for those we don't support. 409 */ 410 if (features.features) { 411 fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n", 412 features.index, features.features); 413 /* XXX: do a unit check here? */ 414 } 415 } 416 sch->curr_status.scsw.count = ccw.count - sizeof(features); 417 ret = 0; 418 } 419 break; 420 case CCW_CMD_READ_CONF: 421 if (check_len) { 422 if (ccw.count > vdev->config_len) { 423 ret = -EINVAL; 424 break; 425 } 426 } 427 len = MIN(ccw.count, vdev->config_len); 428 if (!ccw.cda) { 429 ret = -EFAULT; 430 } else { 431 virtio_bus_get_vdev_config(&dev->bus, vdev->config); 432 /* XXX config space endianness */ 433 cpu_physical_memory_write(ccw.cda, vdev->config, len); 434 sch->curr_status.scsw.count = ccw.count - len; 435 ret = 0; 436 } 437 break; 438 case CCW_CMD_WRITE_CONF: 439 if (check_len) { 440 if (ccw.count > vdev->config_len) { 441 ret = -EINVAL; 442 break; 443 } 444 } 445 len = MIN(ccw.count, vdev->config_len); 446 hw_len = len; 447 if (!ccw.cda) { 448 ret = -EFAULT; 449 } else { 450 config = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 451 if (!config) { 452 ret = -EFAULT; 453 } else { 454 len = hw_len; 455 /* XXX config space endianness */ 456 memcpy(vdev->config, config, len); 457 cpu_physical_memory_unmap(config, hw_len, 0, hw_len); 458 virtio_bus_set_vdev_config(&dev->bus, vdev->config); 459 sch->curr_status.scsw.count = ccw.count - len; 460 ret = 0; 461 } 462 } 463 break; 464 case CCW_CMD_WRITE_STATUS: 465 if (check_len) { 466 if (ccw.count != sizeof(status)) { 467 ret = -EINVAL; 468 break; 469 } 470 } else if (ccw.count < sizeof(status)) { 471 /* Can't execute command. */ 472 ret = -EINVAL; 473 break; 474 } 475 if (!ccw.cda) { 476 ret = -EFAULT; 477 } else { 478 status = ldub_phys(&address_space_memory, ccw.cda); 479 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 480 virtio_ccw_stop_ioeventfd(dev); 481 } 482 virtio_set_status(vdev, status); 483 if (vdev->status == 0) { 484 virtio_reset(vdev); 485 } 486 if (status & VIRTIO_CONFIG_S_DRIVER_OK) { 487 virtio_ccw_start_ioeventfd(dev); 488 } 489 sch->curr_status.scsw.count = ccw.count - sizeof(status); 490 ret = 0; 491 } 492 break; 493 case CCW_CMD_SET_IND: 494 if (check_len) { 495 if (ccw.count != sizeof(indicators)) { 496 ret = -EINVAL; 497 break; 498 } 499 } else if (ccw.count < sizeof(indicators)) { 500 /* Can't execute command. */ 501 ret = -EINVAL; 502 break; 503 } 504 if (sch->thinint_active) { 505 /* Trigger a command reject. */ 506 ret = -ENOSYS; 507 break; 508 } 509 if (!ccw.cda) { 510 ret = -EFAULT; 511 } else { 512 indicators = ldq_phys(&address_space_memory, ccw.cda); 513 dev->indicators = get_indicator(indicators, sizeof(uint64_t)); 514 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 515 ret = 0; 516 } 517 break; 518 case CCW_CMD_SET_CONF_IND: 519 if (check_len) { 520 if (ccw.count != sizeof(indicators)) { 521 ret = -EINVAL; 522 break; 523 } 524 } else if (ccw.count < sizeof(indicators)) { 525 /* Can't execute command. */ 526 ret = -EINVAL; 527 break; 528 } 529 if (!ccw.cda) { 530 ret = -EFAULT; 531 } else { 532 indicators = ldq_phys(&address_space_memory, ccw.cda); 533 dev->indicators2 = get_indicator(indicators, sizeof(uint64_t)); 534 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 535 ret = 0; 536 } 537 break; 538 case CCW_CMD_READ_VQ_CONF: 539 if (check_len) { 540 if (ccw.count != sizeof(vq_config)) { 541 ret = -EINVAL; 542 break; 543 } 544 } else if (ccw.count < sizeof(vq_config)) { 545 /* Can't execute command. */ 546 ret = -EINVAL; 547 break; 548 } 549 if (!ccw.cda) { 550 ret = -EFAULT; 551 } else { 552 vq_config.index = lduw_phys(&address_space_memory, ccw.cda); 553 vq_config.num_max = virtio_queue_get_num(vdev, 554 vq_config.index); 555 stw_phys(&address_space_memory, 556 ccw.cda + sizeof(vq_config.index), vq_config.num_max); 557 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config); 558 ret = 0; 559 } 560 break; 561 case CCW_CMD_SET_IND_ADAPTER: 562 if (check_len) { 563 if (ccw.count != sizeof(*thinint)) { 564 ret = -EINVAL; 565 break; 566 } 567 } else if (ccw.count < sizeof(*thinint)) { 568 /* Can't execute command. */ 569 ret = -EINVAL; 570 break; 571 } 572 len = sizeof(*thinint); 573 hw_len = len; 574 if (!ccw.cda) { 575 ret = -EFAULT; 576 } else if (dev->indicators && !sch->thinint_active) { 577 /* Trigger a command reject. */ 578 ret = -ENOSYS; 579 } else { 580 thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 581 if (!thinint) { 582 ret = -EFAULT; 583 } else { 584 len = hw_len; 585 dev->summary_indicator = 586 get_indicator(thinint->summary_indicator, sizeof(uint8_t)); 587 dev->indicators = get_indicator(thinint->device_indicator, 588 thinint->ind_bit / 8 + 1); 589 dev->thinint_isc = thinint->isc; 590 dev->routes.adapter.ind_offset = thinint->ind_bit; 591 dev->routes.adapter.summary_offset = 7; 592 cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len); 593 ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 594 dev->thinint_isc, true, false, 595 &dev->routes.adapter.adapter_id); 596 assert(ret == 0); 597 sch->thinint_active = ((dev->indicators != NULL) && 598 (dev->summary_indicator != NULL)); 599 sch->curr_status.scsw.count = ccw.count - len; 600 ret = 0; 601 } 602 } 603 break; 604 default: 605 ret = -ENOSYS; 606 break; 607 } 608 return ret; 609 } 610 611 static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev) 612 { 613 unsigned int cssid = 0; 614 unsigned int ssid = 0; 615 unsigned int schid; 616 unsigned int devno; 617 bool have_devno = false; 618 bool found = false; 619 SubchDev *sch; 620 int ret; 621 int num; 622 DeviceState *parent = DEVICE(dev); 623 624 sch = g_malloc0(sizeof(SubchDev)); 625 626 sch->driver_data = dev; 627 dev->sch = sch; 628 629 dev->indicators = NULL; 630 631 /* Initialize subchannel structure. */ 632 sch->channel_prog = 0x0; 633 sch->last_cmd_valid = false; 634 sch->thinint_active = false; 635 /* 636 * Use a device number if provided. Otherwise, fall back to subchannel 637 * number. 638 */ 639 if (dev->bus_id) { 640 num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno); 641 if (num == 3) { 642 if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) { 643 ret = -EINVAL; 644 error_report("Invalid cssid or ssid: cssid %x, ssid %x", 645 cssid, ssid); 646 goto out_err; 647 } 648 /* Enforce use of virtual cssid. */ 649 if (cssid != VIRTUAL_CSSID) { 650 ret = -EINVAL; 651 error_report("cssid %x not valid for virtio devices", cssid); 652 goto out_err; 653 } 654 if (css_devno_used(cssid, ssid, devno)) { 655 ret = -EEXIST; 656 error_report("Device %x.%x.%04x already exists", cssid, ssid, 657 devno); 658 goto out_err; 659 } 660 sch->cssid = cssid; 661 sch->ssid = ssid; 662 sch->devno = devno; 663 have_devno = true; 664 } else { 665 ret = -EINVAL; 666 error_report("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 ret = -ENODEV; 683 error_report("No free subchannel found for %x.%x.%04x", cssid, ssid, 684 devno); 685 goto out_err; 686 } 687 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 688 "user-configured"); 689 } else { 690 cssid = VIRTUAL_CSSID; 691 for (ssid = 0; ssid <= MAX_SSID; ssid++) { 692 for (schid = 0; schid <= MAX_SCHID; schid++) { 693 if (!css_find_subch(1, cssid, ssid, schid)) { 694 sch->cssid = cssid; 695 sch->ssid = ssid; 696 sch->schid = schid; 697 devno = schid; 698 /* 699 * If the devno is already taken, look further in this 700 * subchannel set. 701 */ 702 while (css_devno_used(cssid, ssid, devno)) { 703 if (devno == MAX_SCHID) { 704 devno = 0; 705 } else if (devno == schid - 1) { 706 ret = -ENODEV; 707 error_report("No free devno found"); 708 goto out_err; 709 } else { 710 devno++; 711 } 712 } 713 sch->devno = devno; 714 css_subch_assign(cssid, ssid, schid, devno, sch); 715 found = true; 716 break; 717 } 718 } 719 if (found) { 720 break; 721 } 722 } 723 if (!found) { 724 ret = -ENODEV; 725 error_report("Virtual channel subsystem is full!"); 726 goto out_err; 727 } 728 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 729 "auto-configured"); 730 } 731 732 /* Build initial schib. */ 733 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); 734 735 sch->ccw_cb = virtio_ccw_cb; 736 737 /* Build senseid data. */ 738 memset(&sch->id, 0, sizeof(SenseId)); 739 sch->id.reserved = 0xff; 740 sch->id.cu_type = VIRTIO_CCW_CU_TYPE; 741 sch->id.cu_model = vdev->device_id; 742 743 /* Only the first 32 feature bits are used. */ 744 dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus, 745 dev->host_features[0]); 746 747 dev->host_features[0] |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY; 748 dev->host_features[0] |= 0x1 << VIRTIO_F_BAD_FEATURE; 749 750 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 751 parent->hotplugged, 1); 752 return 0; 753 754 out_err: 755 dev->sch = NULL; 756 g_free(sch); 757 return ret; 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 int virtio_ccw_net_init(VirtioCcwDevice *ccw_dev) 776 { 777 DeviceState *qdev = DEVICE(ccw_dev); 778 VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev); 779 DeviceState *vdev = DEVICE(&dev->vdev); 780 781 virtio_net_set_config_size(&dev->vdev, ccw_dev->host_features[0]); 782 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 783 object_get_typename(OBJECT(qdev))); 784 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 785 if (qdev_init(vdev) < 0) { 786 return -1; 787 } 788 789 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 790 } 791 792 static void virtio_ccw_net_instance_init(Object *obj) 793 { 794 VirtIONetCcw *dev = VIRTIO_NET_CCW(obj); 795 796 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 797 TYPE_VIRTIO_NET); 798 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 799 "bootindex", &error_abort); 800 } 801 802 static int virtio_ccw_blk_init(VirtioCcwDevice *ccw_dev) 803 { 804 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev); 805 DeviceState *vdev = DEVICE(&dev->vdev); 806 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 807 if (qdev_init(vdev) < 0) { 808 return -1; 809 } 810 811 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 812 } 813 814 static void virtio_ccw_blk_instance_init(Object *obj) 815 { 816 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj); 817 818 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 819 TYPE_VIRTIO_BLK); 820 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread", 821 &error_abort); 822 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 823 "bootindex", &error_abort); 824 } 825 826 static int virtio_ccw_serial_init(VirtioCcwDevice *ccw_dev) 827 { 828 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev); 829 DeviceState *vdev = DEVICE(&dev->vdev); 830 DeviceState *proxy = DEVICE(ccw_dev); 831 char *bus_name; 832 833 /* 834 * For command line compatibility, this sets the virtio-serial-device bus 835 * name as before. 836 */ 837 if (proxy->id) { 838 bus_name = g_strdup_printf("%s.0", proxy->id); 839 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 840 g_free(bus_name); 841 } 842 843 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 844 if (qdev_init(vdev) < 0) { 845 return -1; 846 } 847 848 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 849 } 850 851 852 static void virtio_ccw_serial_instance_init(Object *obj) 853 { 854 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj); 855 856 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 857 TYPE_VIRTIO_SERIAL); 858 } 859 860 static int virtio_ccw_balloon_init(VirtioCcwDevice *ccw_dev) 861 { 862 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev); 863 DeviceState *vdev = DEVICE(&dev->vdev); 864 865 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 866 if (qdev_init(vdev) < 0) { 867 return -1; 868 } 869 870 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 871 } 872 873 static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v, 874 void *opaque, const char *name, 875 Error **errp) 876 { 877 VirtIOBalloonCcw *dev = opaque; 878 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); 879 } 880 881 static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v, 882 void *opaque, const char *name, 883 Error **errp) 884 { 885 VirtIOBalloonCcw *dev = opaque; 886 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 887 errp); 888 } 889 890 static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v, 891 void *opaque, const char *name, 892 Error **errp) 893 { 894 VirtIOBalloonCcw *dev = opaque; 895 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 896 errp); 897 } 898 899 static void virtio_ccw_balloon_instance_init(Object *obj) 900 { 901 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj); 902 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON); 903 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 904 object_unref(OBJECT(&dev->vdev)); 905 object_property_add(obj, "guest-stats", "guest statistics", 906 balloon_ccw_stats_get_all, NULL, NULL, dev, NULL); 907 908 object_property_add(obj, "guest-stats-polling-interval", "int", 909 balloon_ccw_stats_get_poll_interval, 910 balloon_ccw_stats_set_poll_interval, 911 NULL, dev, NULL); 912 } 913 914 static int virtio_ccw_scsi_init(VirtioCcwDevice *ccw_dev) 915 { 916 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev); 917 DeviceState *vdev = DEVICE(&dev->vdev); 918 DeviceState *qdev = DEVICE(ccw_dev); 919 char *bus_name; 920 921 /* 922 * For command line compatibility, this sets the virtio-scsi-device bus 923 * name as before. 924 */ 925 if (qdev->id) { 926 bus_name = g_strdup_printf("%s.0", qdev->id); 927 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 928 g_free(bus_name); 929 } 930 931 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 932 if (qdev_init(vdev) < 0) { 933 return -1; 934 } 935 936 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 937 } 938 939 static void virtio_ccw_scsi_instance_init(Object *obj) 940 { 941 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj); 942 943 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 944 TYPE_VIRTIO_SCSI); 945 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread", 946 &error_abort); 947 } 948 949 #ifdef CONFIG_VHOST_SCSI 950 static int vhost_ccw_scsi_init(VirtioCcwDevice *ccw_dev) 951 { 952 VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev); 953 DeviceState *vdev = DEVICE(&dev->vdev); 954 955 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 956 if (qdev_init(vdev) < 0) { 957 return -1; 958 } 959 960 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 961 } 962 963 static void vhost_ccw_scsi_instance_init(Object *obj) 964 { 965 VHostSCSICcw *dev = VHOST_SCSI_CCW(obj); 966 967 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 968 TYPE_VHOST_SCSI); 969 } 970 #endif 971 972 static int virtio_ccw_rng_init(VirtioCcwDevice *ccw_dev) 973 { 974 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev); 975 DeviceState *vdev = DEVICE(&dev->vdev); 976 977 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 978 if (qdev_init(vdev) < 0) { 979 return -1; 980 } 981 982 object_property_set_link(OBJECT(dev), 983 OBJECT(dev->vdev.conf.rng), "rng", 984 NULL); 985 986 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 987 } 988 989 /* DeviceState to VirtioCcwDevice. Note: used on datapath, 990 * be careful and test performance if you change this. 991 */ 992 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) 993 { 994 return container_of(d, VirtioCcwDevice, parent_obj); 995 } 996 997 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, 998 uint8_t to_be_set) 999 { 1000 uint8_t ind_old, ind_new; 1001 hwaddr len = 1; 1002 uint8_t *ind_addr; 1003 1004 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 1005 if (!ind_addr) { 1006 error_report("%s(%x.%x.%04x): unable to access indicator", 1007 __func__, sch->cssid, sch->ssid, sch->schid); 1008 return -1; 1009 } 1010 do { 1011 ind_old = *ind_addr; 1012 ind_new = ind_old | to_be_set; 1013 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 1014 cpu_physical_memory_unmap(ind_addr, len, 1, len); 1015 1016 return ind_old; 1017 } 1018 1019 static void virtio_ccw_notify(DeviceState *d, uint16_t vector) 1020 { 1021 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); 1022 SubchDev *sch = dev->sch; 1023 uint64_t indicators; 1024 1025 if (vector >= 128) { 1026 return; 1027 } 1028 1029 if (vector < VIRTIO_PCI_QUEUE_MAX) { 1030 if (!dev->indicators) { 1031 return; 1032 } 1033 if (sch->thinint_active) { 1034 /* 1035 * In the adapter interrupt case, indicators points to a 1036 * memory area that may be (way) larger than 64 bit and 1037 * ind_bit indicates the start of the indicators in a big 1038 * endian notation. 1039 */ 1040 uint64_t ind_bit = dev->routes.adapter.ind_offset; 1041 1042 virtio_set_ind_atomic(sch, dev->indicators->addr + 1043 (ind_bit + vector) / 8, 1044 0x80 >> ((ind_bit + vector) % 8)); 1045 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr, 1046 0x01)) { 1047 css_adapter_interrupt(dev->thinint_isc); 1048 } 1049 } else { 1050 indicators = ldq_phys(&address_space_memory, dev->indicators->addr); 1051 indicators |= 1ULL << vector; 1052 stq_phys(&address_space_memory, dev->indicators->addr, indicators); 1053 css_conditional_io_interrupt(sch); 1054 } 1055 } else { 1056 if (!dev->indicators2) { 1057 return; 1058 } 1059 vector = 0; 1060 indicators = ldq_phys(&address_space_memory, dev->indicators2->addr); 1061 indicators |= 1ULL << vector; 1062 stq_phys(&address_space_memory, dev->indicators2->addr, indicators); 1063 css_conditional_io_interrupt(sch); 1064 } 1065 } 1066 1067 static unsigned virtio_ccw_get_features(DeviceState *d) 1068 { 1069 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1070 1071 /* Only the first 32 feature bits are used. */ 1072 return dev->host_features[0]; 1073 } 1074 1075 static void virtio_ccw_reset(DeviceState *d) 1076 { 1077 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1078 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1079 1080 virtio_ccw_stop_ioeventfd(dev); 1081 virtio_reset(vdev); 1082 css_reset_sch(dev->sch); 1083 if (dev->indicators) { 1084 release_indicator(&dev->routes.adapter, dev->indicators); 1085 dev->indicators = NULL; 1086 } 1087 if (dev->indicators2) { 1088 release_indicator(&dev->routes.adapter, dev->indicators2); 1089 dev->indicators2 = NULL; 1090 } 1091 if (dev->summary_indicator) { 1092 release_indicator(&dev->routes.adapter, dev->summary_indicator); 1093 dev->summary_indicator = NULL; 1094 } 1095 } 1096 1097 static void virtio_ccw_vmstate_change(DeviceState *d, bool running) 1098 { 1099 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1100 1101 if (running) { 1102 virtio_ccw_start_ioeventfd(dev); 1103 } else { 1104 virtio_ccw_stop_ioeventfd(dev); 1105 } 1106 } 1107 1108 static bool virtio_ccw_query_guest_notifiers(DeviceState *d) 1109 { 1110 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1111 1112 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA); 1113 } 1114 1115 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign) 1116 { 1117 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1118 1119 /* Stop using the generic ioeventfd, we are doing eventfd handling 1120 * ourselves below */ 1121 dev->ioeventfd_disabled = assign; 1122 if (assign) { 1123 virtio_ccw_stop_ioeventfd(dev); 1124 } 1125 return virtio_ccw_set_guest2host_notifier(dev, n, assign, false); 1126 } 1127 1128 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev) 1129 { 1130 int r; 1131 1132 if (!dev->sch->thinint_active) { 1133 return -EINVAL; 1134 } 1135 1136 r = map_indicator(&dev->routes.adapter, dev->summary_indicator); 1137 if (r) { 1138 return r; 1139 } 1140 r = map_indicator(&dev->routes.adapter, dev->indicators); 1141 if (r) { 1142 return r; 1143 } 1144 dev->routes.adapter.summary_addr = dev->summary_indicator->map; 1145 dev->routes.adapter.ind_addr = dev->indicators->map; 1146 1147 return 0; 1148 } 1149 1150 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs) 1151 { 1152 int i; 1153 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1154 int ret; 1155 S390FLICState *fs = s390_get_flic(); 1156 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1157 1158 ret = virtio_ccw_get_mappings(dev); 1159 if (ret) { 1160 return ret; 1161 } 1162 for (i = 0; i < nvqs; i++) { 1163 if (!virtio_queue_get_num(vdev, i)) { 1164 break; 1165 } 1166 } 1167 dev->routes.num_routes = i; 1168 return fsc->add_adapter_routes(fs, &dev->routes); 1169 } 1170 1171 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs) 1172 { 1173 S390FLICState *fs = s390_get_flic(); 1174 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1175 1176 fsc->release_adapter_routes(fs, &dev->routes); 1177 } 1178 1179 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n) 1180 { 1181 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1182 VirtQueue *vq = virtio_get_queue(vdev, n); 1183 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1184 1185 return kvm_irqchip_add_irqfd_notifier(kvm_state, notifier, NULL, 1186 dev->routes.gsi[n]); 1187 } 1188 1189 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n) 1190 { 1191 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1192 VirtQueue *vq = virtio_get_queue(vdev, n); 1193 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1194 int ret; 1195 1196 ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, notifier, 1197 dev->routes.gsi[n]); 1198 assert(ret == 0); 1199 } 1200 1201 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n, 1202 bool assign, bool with_irqfd) 1203 { 1204 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1205 VirtQueue *vq = virtio_get_queue(vdev, n); 1206 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1207 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 1208 1209 if (assign) { 1210 int r = event_notifier_init(notifier, 0); 1211 1212 if (r < 0) { 1213 return r; 1214 } 1215 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 1216 if (with_irqfd) { 1217 r = virtio_ccw_add_irqfd(dev, n); 1218 if (r) { 1219 virtio_queue_set_guest_notifier_fd_handler(vq, false, 1220 with_irqfd); 1221 return r; 1222 } 1223 } 1224 /* 1225 * We do not support individual masking for channel devices, so we 1226 * need to manually trigger any guest masking callbacks here. 1227 */ 1228 if (k->guest_notifier_mask) { 1229 k->guest_notifier_mask(vdev, n, false); 1230 } 1231 /* get lost events and re-inject */ 1232 if (k->guest_notifier_pending && 1233 k->guest_notifier_pending(vdev, n)) { 1234 event_notifier_set(notifier); 1235 } 1236 } else { 1237 if (k->guest_notifier_mask) { 1238 k->guest_notifier_mask(vdev, n, true); 1239 } 1240 if (with_irqfd) { 1241 virtio_ccw_remove_irqfd(dev, n); 1242 } 1243 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 1244 event_notifier_cleanup(notifier); 1245 } 1246 return 0; 1247 } 1248 1249 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs, 1250 bool assigned) 1251 { 1252 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1253 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1254 bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled(); 1255 int r, n; 1256 1257 if (with_irqfd && assigned) { 1258 /* irq routes need to be set up before assigning irqfds */ 1259 r = virtio_ccw_setup_irqroutes(dev, nvqs); 1260 if (r < 0) { 1261 goto irqroute_error; 1262 } 1263 } 1264 for (n = 0; n < nvqs; n++) { 1265 if (!virtio_queue_get_num(vdev, n)) { 1266 break; 1267 } 1268 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd); 1269 if (r < 0) { 1270 goto assign_error; 1271 } 1272 } 1273 if (with_irqfd && !assigned) { 1274 /* release irq routes after irqfds have been released */ 1275 virtio_ccw_release_irqroutes(dev, nvqs); 1276 } 1277 return 0; 1278 1279 assign_error: 1280 while (--n >= 0) { 1281 virtio_ccw_set_guest_notifier(dev, n, !assigned, false); 1282 } 1283 irqroute_error: 1284 if (with_irqfd && assigned) { 1285 virtio_ccw_release_irqroutes(dev, nvqs); 1286 } 1287 return r; 1288 } 1289 1290 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f) 1291 { 1292 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1293 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1294 1295 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 1296 } 1297 1298 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f) 1299 { 1300 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1301 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1302 uint16_t vector; 1303 1304 qemu_get_be16s(f, &vector); 1305 virtio_queue_set_vector(vdev, n , vector); 1306 1307 return 0; 1308 } 1309 1310 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) 1311 { 1312 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1313 SubchDev *s = dev->sch; 1314 1315 subch_device_save(s, f); 1316 if (dev->indicators != NULL) { 1317 qemu_put_be32(f, dev->indicators->len); 1318 qemu_put_be64(f, dev->indicators->addr); 1319 } else { 1320 qemu_put_be32(f, 0); 1321 qemu_put_be64(f, 0UL); 1322 } 1323 if (dev->indicators2 != NULL) { 1324 qemu_put_be32(f, dev->indicators2->len); 1325 qemu_put_be64(f, dev->indicators2->addr); 1326 } else { 1327 qemu_put_be32(f, 0); 1328 qemu_put_be64(f, 0UL); 1329 } 1330 if (dev->summary_indicator != NULL) { 1331 qemu_put_be32(f, dev->summary_indicator->len); 1332 qemu_put_be64(f, dev->summary_indicator->addr); 1333 } else { 1334 qemu_put_be32(f, 0); 1335 qemu_put_be64(f, 0UL); 1336 } 1337 qemu_put_be64(f, dev->routes.adapter.ind_offset); 1338 qemu_put_byte(f, dev->thinint_isc); 1339 } 1340 1341 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) 1342 { 1343 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1344 SubchDev *s = dev->sch; 1345 int len; 1346 1347 s->driver_data = dev; 1348 subch_device_load(s, f); 1349 len = qemu_get_be32(f); 1350 if (len != 0) { 1351 dev->indicators = get_indicator(qemu_get_be64(f), len); 1352 } else { 1353 qemu_get_be64(f); 1354 dev->indicators = NULL; 1355 } 1356 len = qemu_get_be32(f); 1357 if (len != 0) { 1358 dev->indicators2 = get_indicator(qemu_get_be64(f), len); 1359 } else { 1360 qemu_get_be64(f); 1361 dev->indicators2 = NULL; 1362 } 1363 len = qemu_get_be32(f); 1364 if (len != 0) { 1365 dev->summary_indicator = get_indicator(qemu_get_be64(f), len); 1366 } else { 1367 qemu_get_be64(f); 1368 dev->summary_indicator = NULL; 1369 } 1370 dev->routes.adapter.ind_offset = qemu_get_be64(f); 1371 dev->thinint_isc = qemu_get_byte(f); 1372 if (s->thinint_active) { 1373 return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 1374 dev->thinint_isc, true, false, 1375 &dev->routes.adapter.adapter_id); 1376 } 1377 1378 return 0; 1379 } 1380 1381 /**************** Virtio-ccw Bus Device Descriptions *******************/ 1382 1383 static Property virtio_ccw_net_properties[] = { 1384 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1385 DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]), 1386 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1387 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1388 DEFINE_PROP_END_OF_LIST(), 1389 }; 1390 1391 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data) 1392 { 1393 DeviceClass *dc = DEVICE_CLASS(klass); 1394 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1395 1396 k->init = virtio_ccw_net_init; 1397 k->exit = virtio_ccw_exit; 1398 dc->reset = virtio_ccw_reset; 1399 dc->props = virtio_ccw_net_properties; 1400 } 1401 1402 static const TypeInfo virtio_ccw_net = { 1403 .name = TYPE_VIRTIO_NET_CCW, 1404 .parent = TYPE_VIRTIO_CCW_DEVICE, 1405 .instance_size = sizeof(VirtIONetCcw), 1406 .instance_init = virtio_ccw_net_instance_init, 1407 .class_init = virtio_ccw_net_class_init, 1408 }; 1409 1410 static Property virtio_ccw_blk_properties[] = { 1411 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1412 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1413 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1414 DEFINE_PROP_END_OF_LIST(), 1415 }; 1416 1417 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data) 1418 { 1419 DeviceClass *dc = DEVICE_CLASS(klass); 1420 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1421 1422 k->init = virtio_ccw_blk_init; 1423 k->exit = virtio_ccw_exit; 1424 dc->reset = virtio_ccw_reset; 1425 dc->props = virtio_ccw_blk_properties; 1426 } 1427 1428 static const TypeInfo virtio_ccw_blk = { 1429 .name = TYPE_VIRTIO_BLK_CCW, 1430 .parent = TYPE_VIRTIO_CCW_DEVICE, 1431 .instance_size = sizeof(VirtIOBlkCcw), 1432 .instance_init = virtio_ccw_blk_instance_init, 1433 .class_init = virtio_ccw_blk_class_init, 1434 }; 1435 1436 static Property virtio_ccw_serial_properties[] = { 1437 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1438 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1439 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1440 DEFINE_PROP_END_OF_LIST(), 1441 }; 1442 1443 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data) 1444 { 1445 DeviceClass *dc = DEVICE_CLASS(klass); 1446 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1447 1448 k->init = virtio_ccw_serial_init; 1449 k->exit = virtio_ccw_exit; 1450 dc->reset = virtio_ccw_reset; 1451 dc->props = virtio_ccw_serial_properties; 1452 } 1453 1454 static const TypeInfo virtio_ccw_serial = { 1455 .name = TYPE_VIRTIO_SERIAL_CCW, 1456 .parent = TYPE_VIRTIO_CCW_DEVICE, 1457 .instance_size = sizeof(VirtioSerialCcw), 1458 .instance_init = virtio_ccw_serial_instance_init, 1459 .class_init = virtio_ccw_serial_class_init, 1460 }; 1461 1462 static Property virtio_ccw_balloon_properties[] = { 1463 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1464 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1465 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1466 DEFINE_PROP_END_OF_LIST(), 1467 }; 1468 1469 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data) 1470 { 1471 DeviceClass *dc = DEVICE_CLASS(klass); 1472 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1473 1474 k->init = virtio_ccw_balloon_init; 1475 k->exit = virtio_ccw_exit; 1476 dc->reset = virtio_ccw_reset; 1477 dc->props = virtio_ccw_balloon_properties; 1478 } 1479 1480 static const TypeInfo virtio_ccw_balloon = { 1481 .name = TYPE_VIRTIO_BALLOON_CCW, 1482 .parent = TYPE_VIRTIO_CCW_DEVICE, 1483 .instance_size = sizeof(VirtIOBalloonCcw), 1484 .instance_init = virtio_ccw_balloon_instance_init, 1485 .class_init = virtio_ccw_balloon_class_init, 1486 }; 1487 1488 static Property virtio_ccw_scsi_properties[] = { 1489 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1490 DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]), 1491 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1492 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1493 DEFINE_PROP_END_OF_LIST(), 1494 }; 1495 1496 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data) 1497 { 1498 DeviceClass *dc = DEVICE_CLASS(klass); 1499 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1500 1501 k->init = virtio_ccw_scsi_init; 1502 k->exit = virtio_ccw_exit; 1503 dc->reset = virtio_ccw_reset; 1504 dc->props = virtio_ccw_scsi_properties; 1505 } 1506 1507 static const TypeInfo virtio_ccw_scsi = { 1508 .name = TYPE_VIRTIO_SCSI_CCW, 1509 .parent = TYPE_VIRTIO_CCW_DEVICE, 1510 .instance_size = sizeof(VirtIOSCSICcw), 1511 .instance_init = virtio_ccw_scsi_instance_init, 1512 .class_init = virtio_ccw_scsi_class_init, 1513 }; 1514 1515 #ifdef CONFIG_VHOST_SCSI 1516 static Property vhost_ccw_scsi_properties[] = { 1517 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1518 DEFINE_PROP_END_OF_LIST(), 1519 }; 1520 1521 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data) 1522 { 1523 DeviceClass *dc = DEVICE_CLASS(klass); 1524 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1525 1526 k->init = vhost_ccw_scsi_init; 1527 k->exit = virtio_ccw_exit; 1528 dc->reset = virtio_ccw_reset; 1529 dc->props = vhost_ccw_scsi_properties; 1530 } 1531 1532 static const TypeInfo vhost_ccw_scsi = { 1533 .name = TYPE_VHOST_SCSI_CCW, 1534 .parent = TYPE_VIRTIO_CCW_DEVICE, 1535 .instance_size = sizeof(VHostSCSICcw), 1536 .instance_init = vhost_ccw_scsi_instance_init, 1537 .class_init = vhost_ccw_scsi_class_init, 1538 }; 1539 #endif 1540 1541 static void virtio_ccw_rng_instance_init(Object *obj) 1542 { 1543 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj); 1544 1545 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1546 TYPE_VIRTIO_RNG); 1547 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), 1548 "rng", &error_abort); 1549 } 1550 1551 static Property virtio_ccw_rng_properties[] = { 1552 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1553 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1554 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1555 DEFINE_PROP_END_OF_LIST(), 1556 }; 1557 1558 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data) 1559 { 1560 DeviceClass *dc = DEVICE_CLASS(klass); 1561 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1562 1563 k->init = virtio_ccw_rng_init; 1564 k->exit = virtio_ccw_exit; 1565 dc->reset = virtio_ccw_reset; 1566 dc->props = virtio_ccw_rng_properties; 1567 } 1568 1569 static const TypeInfo virtio_ccw_rng = { 1570 .name = TYPE_VIRTIO_RNG_CCW, 1571 .parent = TYPE_VIRTIO_CCW_DEVICE, 1572 .instance_size = sizeof(VirtIORNGCcw), 1573 .instance_init = virtio_ccw_rng_instance_init, 1574 .class_init = virtio_ccw_rng_class_init, 1575 }; 1576 1577 static int virtio_ccw_busdev_init(DeviceState *dev) 1578 { 1579 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1580 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1581 1582 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev); 1583 1584 return _info->init(_dev); 1585 } 1586 1587 static int virtio_ccw_busdev_exit(DeviceState *dev) 1588 { 1589 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1590 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1591 1592 return _info->exit(_dev); 1593 } 1594 1595 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev, 1596 DeviceState *dev, Error **errp) 1597 { 1598 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1599 SubchDev *sch = _dev->sch; 1600 1601 virtio_ccw_stop_ioeventfd(_dev); 1602 1603 /* 1604 * We should arrive here only for device_del, since we don't support 1605 * direct hot(un)plug of channels, but only through virtio. 1606 */ 1607 assert(sch != NULL); 1608 /* Subchannel is now disabled and no longer valid. */ 1609 sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA | 1610 PMCW_FLAGS_MASK_DNV); 1611 1612 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0); 1613 1614 object_unparent(OBJECT(dev)); 1615 } 1616 1617 static Property virtio_ccw_properties[] = { 1618 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]), 1619 DEFINE_PROP_END_OF_LIST(), 1620 }; 1621 1622 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) 1623 { 1624 DeviceClass *dc = DEVICE_CLASS(klass); 1625 1626 dc->props = virtio_ccw_properties; 1627 dc->init = virtio_ccw_busdev_init; 1628 dc->exit = virtio_ccw_busdev_exit; 1629 dc->bus_type = TYPE_VIRTUAL_CSS_BUS; 1630 } 1631 1632 static const TypeInfo virtio_ccw_device_info = { 1633 .name = TYPE_VIRTIO_CCW_DEVICE, 1634 .parent = TYPE_DEVICE, 1635 .instance_size = sizeof(VirtioCcwDevice), 1636 .class_init = virtio_ccw_device_class_init, 1637 .class_size = sizeof(VirtIOCCWDeviceClass), 1638 .abstract = true, 1639 }; 1640 1641 /***************** Virtual-css Bus Bridge Device ********************/ 1642 /* Only required to have the virtio bus as child in the system bus */ 1643 1644 static int virtual_css_bridge_init(SysBusDevice *dev) 1645 { 1646 /* nothing */ 1647 return 0; 1648 } 1649 1650 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data) 1651 { 1652 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 1653 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 1654 1655 k->init = virtual_css_bridge_init; 1656 hc->unplug = virtio_ccw_busdev_unplug; 1657 } 1658 1659 static const TypeInfo virtual_css_bridge_info = { 1660 .name = "virtual-css-bridge", 1661 .parent = TYPE_SYS_BUS_DEVICE, 1662 .instance_size = sizeof(SysBusDevice), 1663 .class_init = virtual_css_bridge_class_init, 1664 .interfaces = (InterfaceInfo[]) { 1665 { TYPE_HOTPLUG_HANDLER }, 1666 { } 1667 } 1668 }; 1669 1670 /* virtio-ccw-bus */ 1671 1672 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 1673 VirtioCcwDevice *dev) 1674 { 1675 DeviceState *qdev = DEVICE(dev); 1676 char virtio_bus_name[] = "virtio-bus"; 1677 1678 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS, 1679 qdev, virtio_bus_name); 1680 } 1681 1682 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data) 1683 { 1684 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1685 BusClass *bus_class = BUS_CLASS(klass); 1686 1687 bus_class->max_dev = 1; 1688 k->notify = virtio_ccw_notify; 1689 k->get_features = virtio_ccw_get_features; 1690 k->vmstate_change = virtio_ccw_vmstate_change; 1691 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers; 1692 k->set_host_notifier = virtio_ccw_set_host_notifier; 1693 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers; 1694 k->save_queue = virtio_ccw_save_queue; 1695 k->load_queue = virtio_ccw_load_queue; 1696 k->save_config = virtio_ccw_save_config; 1697 k->load_config = virtio_ccw_load_config; 1698 } 1699 1700 static const TypeInfo virtio_ccw_bus_info = { 1701 .name = TYPE_VIRTIO_CCW_BUS, 1702 .parent = TYPE_VIRTIO_BUS, 1703 .instance_size = sizeof(VirtioCcwBusState), 1704 .class_init = virtio_ccw_bus_class_init, 1705 }; 1706 1707 static void virtio_ccw_register(void) 1708 { 1709 type_register_static(&virtio_ccw_bus_info); 1710 type_register_static(&virtual_css_bus_info); 1711 type_register_static(&virtio_ccw_device_info); 1712 type_register_static(&virtio_ccw_serial); 1713 type_register_static(&virtio_ccw_blk); 1714 type_register_static(&virtio_ccw_net); 1715 type_register_static(&virtio_ccw_balloon); 1716 type_register_static(&virtio_ccw_scsi); 1717 #ifdef CONFIG_VHOST_SCSI 1718 type_register_static(&vhost_ccw_scsi); 1719 #endif 1720 type_register_static(&virtio_ccw_rng); 1721 type_register_static(&virtual_css_bridge_info); 1722 } 1723 1724 type_init(virtio_ccw_register) 1725