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 = address_space_ldq(&address_space_memory, ccw.cda, 339 MEMTXATTRS_UNSPECIFIED, NULL); 340 info.align = address_space_ldl(&address_space_memory, 341 ccw.cda + sizeof(info.queue), 342 MEMTXATTRS_UNSPECIFIED, 343 NULL); 344 info.index = address_space_lduw(&address_space_memory, 345 ccw.cda + sizeof(info.queue) 346 + sizeof(info.align), 347 MEMTXATTRS_UNSPECIFIED, 348 NULL); 349 info.num = address_space_lduw(&address_space_memory, 350 ccw.cda + sizeof(info.queue) 351 + sizeof(info.align) 352 + sizeof(info.index), 353 MEMTXATTRS_UNSPECIFIED, 354 NULL); 355 ret = virtio_ccw_set_vqs(sch, info.queue, info.align, info.index, 356 info.num); 357 sch->curr_status.scsw.count = 0; 358 } 359 break; 360 case CCW_CMD_VDEV_RESET: 361 virtio_ccw_stop_ioeventfd(dev); 362 virtio_reset(vdev); 363 ret = 0; 364 break; 365 case CCW_CMD_READ_FEAT: 366 if (check_len) { 367 if (ccw.count != sizeof(features)) { 368 ret = -EINVAL; 369 break; 370 } 371 } else if (ccw.count < sizeof(features)) { 372 /* Can't execute command. */ 373 ret = -EINVAL; 374 break; 375 } 376 if (!ccw.cda) { 377 ret = -EFAULT; 378 } else { 379 features.index = address_space_ldub(&address_space_memory, 380 ccw.cda 381 + sizeof(features.features), 382 MEMTXATTRS_UNSPECIFIED, 383 NULL); 384 if (features.index < ARRAY_SIZE(dev->host_features)) { 385 features.features = dev->host_features[features.index]; 386 } else { 387 /* Return zeroes if the guest supports more feature bits. */ 388 features.features = 0; 389 } 390 address_space_stl_le(&address_space_memory, ccw.cda, 391 features.features, MEMTXATTRS_UNSPECIFIED, 392 NULL); 393 sch->curr_status.scsw.count = ccw.count - sizeof(features); 394 ret = 0; 395 } 396 break; 397 case CCW_CMD_WRITE_FEAT: 398 if (check_len) { 399 if (ccw.count != sizeof(features)) { 400 ret = -EINVAL; 401 break; 402 } 403 } else if (ccw.count < sizeof(features)) { 404 /* Can't execute command. */ 405 ret = -EINVAL; 406 break; 407 } 408 if (!ccw.cda) { 409 ret = -EFAULT; 410 } else { 411 features.index = address_space_ldub(&address_space_memory, 412 ccw.cda 413 + sizeof(features.features), 414 MEMTXATTRS_UNSPECIFIED, 415 NULL); 416 features.features = address_space_ldl_le(&address_space_memory, 417 ccw.cda, 418 MEMTXATTRS_UNSPECIFIED, 419 NULL); 420 if (features.index < ARRAY_SIZE(dev->host_features)) { 421 virtio_set_features(vdev, features.features); 422 } else { 423 /* 424 * If the guest supports more feature bits, assert that it 425 * passes us zeroes for those we don't support. 426 */ 427 if (features.features) { 428 fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n", 429 features.index, features.features); 430 /* XXX: do a unit check here? */ 431 } 432 } 433 sch->curr_status.scsw.count = ccw.count - sizeof(features); 434 ret = 0; 435 } 436 break; 437 case CCW_CMD_READ_CONF: 438 if (check_len) { 439 if (ccw.count > vdev->config_len) { 440 ret = -EINVAL; 441 break; 442 } 443 } 444 len = MIN(ccw.count, vdev->config_len); 445 if (!ccw.cda) { 446 ret = -EFAULT; 447 } else { 448 virtio_bus_get_vdev_config(&dev->bus, vdev->config); 449 /* XXX config space endianness */ 450 cpu_physical_memory_write(ccw.cda, vdev->config, len); 451 sch->curr_status.scsw.count = ccw.count - len; 452 ret = 0; 453 } 454 break; 455 case CCW_CMD_WRITE_CONF: 456 if (check_len) { 457 if (ccw.count > vdev->config_len) { 458 ret = -EINVAL; 459 break; 460 } 461 } 462 len = MIN(ccw.count, vdev->config_len); 463 hw_len = len; 464 if (!ccw.cda) { 465 ret = -EFAULT; 466 } else { 467 config = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 468 if (!config) { 469 ret = -EFAULT; 470 } else { 471 len = hw_len; 472 /* XXX config space endianness */ 473 memcpy(vdev->config, config, len); 474 cpu_physical_memory_unmap(config, hw_len, 0, hw_len); 475 virtio_bus_set_vdev_config(&dev->bus, vdev->config); 476 sch->curr_status.scsw.count = ccw.count - len; 477 ret = 0; 478 } 479 } 480 break; 481 case CCW_CMD_WRITE_STATUS: 482 if (check_len) { 483 if (ccw.count != sizeof(status)) { 484 ret = -EINVAL; 485 break; 486 } 487 } else if (ccw.count < sizeof(status)) { 488 /* Can't execute command. */ 489 ret = -EINVAL; 490 break; 491 } 492 if (!ccw.cda) { 493 ret = -EFAULT; 494 } else { 495 status = address_space_ldub(&address_space_memory, ccw.cda, 496 MEMTXATTRS_UNSPECIFIED, NULL); 497 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 498 virtio_ccw_stop_ioeventfd(dev); 499 } 500 virtio_set_status(vdev, status); 501 if (vdev->status == 0) { 502 virtio_reset(vdev); 503 } 504 if (status & VIRTIO_CONFIG_S_DRIVER_OK) { 505 virtio_ccw_start_ioeventfd(dev); 506 } 507 sch->curr_status.scsw.count = ccw.count - sizeof(status); 508 ret = 0; 509 } 510 break; 511 case CCW_CMD_SET_IND: 512 if (check_len) { 513 if (ccw.count != sizeof(indicators)) { 514 ret = -EINVAL; 515 break; 516 } 517 } else if (ccw.count < sizeof(indicators)) { 518 /* Can't execute command. */ 519 ret = -EINVAL; 520 break; 521 } 522 if (sch->thinint_active) { 523 /* Trigger a command reject. */ 524 ret = -ENOSYS; 525 break; 526 } 527 if (!ccw.cda) { 528 ret = -EFAULT; 529 } else { 530 indicators = address_space_ldq_be(&address_space_memory, ccw.cda, 531 MEMTXATTRS_UNSPECIFIED, NULL); 532 dev->indicators = get_indicator(indicators, sizeof(uint64_t)); 533 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 534 ret = 0; 535 } 536 break; 537 case CCW_CMD_SET_CONF_IND: 538 if (check_len) { 539 if (ccw.count != sizeof(indicators)) { 540 ret = -EINVAL; 541 break; 542 } 543 } else if (ccw.count < sizeof(indicators)) { 544 /* Can't execute command. */ 545 ret = -EINVAL; 546 break; 547 } 548 if (!ccw.cda) { 549 ret = -EFAULT; 550 } else { 551 indicators = address_space_ldq_be(&address_space_memory, ccw.cda, 552 MEMTXATTRS_UNSPECIFIED, NULL); 553 dev->indicators2 = get_indicator(indicators, sizeof(uint64_t)); 554 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 555 ret = 0; 556 } 557 break; 558 case CCW_CMD_READ_VQ_CONF: 559 if (check_len) { 560 if (ccw.count != sizeof(vq_config)) { 561 ret = -EINVAL; 562 break; 563 } 564 } else if (ccw.count < sizeof(vq_config)) { 565 /* Can't execute command. */ 566 ret = -EINVAL; 567 break; 568 } 569 if (!ccw.cda) { 570 ret = -EFAULT; 571 } else { 572 vq_config.index = address_space_lduw_be(&address_space_memory, 573 ccw.cda, 574 MEMTXATTRS_UNSPECIFIED, 575 NULL); 576 if (vq_config.index >= VIRTIO_PCI_QUEUE_MAX) { 577 ret = -EINVAL; 578 break; 579 } 580 vq_config.num_max = virtio_queue_get_num(vdev, 581 vq_config.index); 582 address_space_stw_be(&address_space_memory, 583 ccw.cda + sizeof(vq_config.index), 584 vq_config.num_max, 585 MEMTXATTRS_UNSPECIFIED, 586 NULL); 587 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config); 588 ret = 0; 589 } 590 break; 591 case CCW_CMD_SET_IND_ADAPTER: 592 if (check_len) { 593 if (ccw.count != sizeof(*thinint)) { 594 ret = -EINVAL; 595 break; 596 } 597 } else if (ccw.count < sizeof(*thinint)) { 598 /* Can't execute command. */ 599 ret = -EINVAL; 600 break; 601 } 602 len = sizeof(*thinint); 603 hw_len = len; 604 if (!ccw.cda) { 605 ret = -EFAULT; 606 } else if (dev->indicators && !sch->thinint_active) { 607 /* Trigger a command reject. */ 608 ret = -ENOSYS; 609 } else { 610 thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 611 if (!thinint) { 612 ret = -EFAULT; 613 } else { 614 uint64_t ind_bit = ldq_be_p(&thinint->ind_bit); 615 616 len = hw_len; 617 dev->summary_indicator = 618 get_indicator(ldq_be_p(&thinint->summary_indicator), 619 sizeof(uint8_t)); 620 dev->indicators = 621 get_indicator(ldq_be_p(&thinint->device_indicator), 622 ind_bit / 8 + 1); 623 dev->thinint_isc = thinint->isc; 624 dev->routes.adapter.ind_offset = ind_bit; 625 dev->routes.adapter.summary_offset = 7; 626 cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len); 627 ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 628 dev->thinint_isc, true, false, 629 &dev->routes.adapter.adapter_id); 630 assert(ret == 0); 631 sch->thinint_active = ((dev->indicators != NULL) && 632 (dev->summary_indicator != NULL)); 633 sch->curr_status.scsw.count = ccw.count - len; 634 ret = 0; 635 } 636 } 637 break; 638 default: 639 ret = -ENOSYS; 640 break; 641 } 642 return ret; 643 } 644 645 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, 646 VirtIODevice *vdev, Error **errp) 647 { 648 unsigned int cssid = 0; 649 unsigned int ssid = 0; 650 unsigned int schid; 651 unsigned int devno; 652 bool have_devno = false; 653 bool found = false; 654 SubchDev *sch; 655 int num; 656 DeviceState *parent = DEVICE(dev); 657 658 sch = g_malloc0(sizeof(SubchDev)); 659 660 sch->driver_data = dev; 661 dev->sch = sch; 662 663 dev->indicators = NULL; 664 665 /* Initialize subchannel structure. */ 666 sch->channel_prog = 0x0; 667 sch->last_cmd_valid = false; 668 sch->thinint_active = false; 669 /* 670 * Use a device number if provided. Otherwise, fall back to subchannel 671 * number. 672 */ 673 if (dev->bus_id) { 674 num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno); 675 if (num == 3) { 676 if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) { 677 error_setg(errp, "Invalid cssid or ssid: cssid %x, ssid %x", 678 cssid, ssid); 679 goto out_err; 680 } 681 /* Enforce use of virtual cssid. */ 682 if (cssid != VIRTUAL_CSSID) { 683 error_setg(errp, "cssid %x not valid for virtio devices", 684 cssid); 685 goto out_err; 686 } 687 if (css_devno_used(cssid, ssid, devno)) { 688 error_setg(errp, "Device %x.%x.%04x already exists", 689 cssid, ssid, devno); 690 goto out_err; 691 } 692 sch->cssid = cssid; 693 sch->ssid = ssid; 694 sch->devno = devno; 695 have_devno = true; 696 } else { 697 error_setg(errp, "Malformed devno parameter '%s'", dev->bus_id); 698 goto out_err; 699 } 700 } 701 702 /* Find the next free id. */ 703 if (have_devno) { 704 for (schid = 0; schid <= MAX_SCHID; schid++) { 705 if (!css_find_subch(1, cssid, ssid, schid)) { 706 sch->schid = schid; 707 css_subch_assign(cssid, ssid, schid, devno, sch); 708 found = true; 709 break; 710 } 711 } 712 if (!found) { 713 error_setg(errp, "No free subchannel found for %x.%x.%04x", 714 cssid, ssid, devno); 715 goto out_err; 716 } 717 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 718 "user-configured"); 719 } else { 720 cssid = VIRTUAL_CSSID; 721 for (ssid = 0; ssid <= MAX_SSID; ssid++) { 722 for (schid = 0; schid <= MAX_SCHID; schid++) { 723 if (!css_find_subch(1, cssid, ssid, schid)) { 724 sch->cssid = cssid; 725 sch->ssid = ssid; 726 sch->schid = schid; 727 devno = schid; 728 /* 729 * If the devno is already taken, look further in this 730 * subchannel set. 731 */ 732 while (css_devno_used(cssid, ssid, devno)) { 733 if (devno == MAX_SCHID) { 734 devno = 0; 735 } else if (devno == schid - 1) { 736 error_setg(errp, "No free devno found"); 737 goto out_err; 738 } else { 739 devno++; 740 } 741 } 742 sch->devno = devno; 743 css_subch_assign(cssid, ssid, schid, devno, sch); 744 found = true; 745 break; 746 } 747 } 748 if (found) { 749 break; 750 } 751 } 752 if (!found) { 753 error_setg(errp, "Virtual channel subsystem is full!"); 754 goto out_err; 755 } 756 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 757 "auto-configured"); 758 } 759 760 /* Build initial schib. */ 761 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); 762 763 sch->ccw_cb = virtio_ccw_cb; 764 765 /* Build senseid data. */ 766 memset(&sch->id, 0, sizeof(SenseId)); 767 sch->id.reserved = 0xff; 768 sch->id.cu_type = VIRTIO_CCW_CU_TYPE; 769 sch->id.cu_model = vdev->device_id; 770 771 /* Only the first 32 feature bits are used. */ 772 dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus, 773 dev->host_features[0]); 774 775 virtio_add_feature(&dev->host_features[0], VIRTIO_F_NOTIFY_ON_EMPTY); 776 virtio_add_feature(&dev->host_features[0], VIRTIO_F_BAD_FEATURE); 777 778 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 779 parent->hotplugged, 1); 780 return; 781 782 out_err: 783 dev->sch = NULL; 784 g_free(sch); 785 } 786 787 static int virtio_ccw_exit(VirtioCcwDevice *dev) 788 { 789 SubchDev *sch = dev->sch; 790 791 if (sch) { 792 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 793 g_free(sch); 794 } 795 if (dev->indicators) { 796 release_indicator(&dev->routes.adapter, dev->indicators); 797 dev->indicators = NULL; 798 } 799 return 0; 800 } 801 802 static void virtio_ccw_net_realize(VirtioCcwDevice *ccw_dev, Error **errp) 803 { 804 DeviceState *qdev = DEVICE(ccw_dev); 805 VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev); 806 DeviceState *vdev = DEVICE(&dev->vdev); 807 Error *err = NULL; 808 809 virtio_net_set_config_size(&dev->vdev, ccw_dev->host_features[0]); 810 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 811 object_get_typename(OBJECT(qdev))); 812 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 813 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 814 if (err) { 815 error_propagate(errp, err); 816 return; 817 } 818 819 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 820 } 821 822 static void virtio_ccw_net_instance_init(Object *obj) 823 { 824 VirtIONetCcw *dev = VIRTIO_NET_CCW(obj); 825 826 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 827 TYPE_VIRTIO_NET); 828 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 829 "bootindex", &error_abort); 830 } 831 832 static void virtio_ccw_blk_realize(VirtioCcwDevice *ccw_dev, Error **errp) 833 { 834 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev); 835 DeviceState *vdev = DEVICE(&dev->vdev); 836 Error *err = NULL; 837 838 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 839 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 840 if (err) { 841 error_propagate(errp, err); 842 return; 843 } 844 845 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 846 } 847 848 static void virtio_ccw_blk_instance_init(Object *obj) 849 { 850 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj); 851 852 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 853 TYPE_VIRTIO_BLK); 854 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread", 855 &error_abort); 856 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 857 "bootindex", &error_abort); 858 } 859 860 static void virtio_ccw_serial_realize(VirtioCcwDevice *ccw_dev, Error **errp) 861 { 862 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev); 863 DeviceState *vdev = DEVICE(&dev->vdev); 864 DeviceState *proxy = DEVICE(ccw_dev); 865 Error *err = NULL; 866 char *bus_name; 867 868 /* 869 * For command line compatibility, this sets the virtio-serial-device bus 870 * name as before. 871 */ 872 if (proxy->id) { 873 bus_name = g_strdup_printf("%s.0", proxy->id); 874 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 875 g_free(bus_name); 876 } 877 878 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 879 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 880 if (err) { 881 error_propagate(errp, err); 882 return; 883 } 884 885 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 886 } 887 888 889 static void virtio_ccw_serial_instance_init(Object *obj) 890 { 891 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj); 892 893 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 894 TYPE_VIRTIO_SERIAL); 895 } 896 897 static void virtio_ccw_balloon_realize(VirtioCcwDevice *ccw_dev, Error **errp) 898 { 899 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev); 900 DeviceState *vdev = DEVICE(&dev->vdev); 901 Error *err = NULL; 902 903 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 904 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 905 if (err) { 906 error_propagate(errp, err); 907 return; 908 } 909 910 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 911 } 912 913 static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v, 914 void *opaque, const char *name, 915 Error **errp) 916 { 917 VirtIOBalloonCcw *dev = opaque; 918 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); 919 } 920 921 static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v, 922 void *opaque, const char *name, 923 Error **errp) 924 { 925 VirtIOBalloonCcw *dev = opaque; 926 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 927 errp); 928 } 929 930 static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v, 931 void *opaque, const char *name, 932 Error **errp) 933 { 934 VirtIOBalloonCcw *dev = opaque; 935 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 936 errp); 937 } 938 939 static void virtio_ccw_balloon_instance_init(Object *obj) 940 { 941 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj); 942 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 943 TYPE_VIRTIO_BALLOON); 944 object_property_add(obj, "guest-stats", "guest statistics", 945 balloon_ccw_stats_get_all, NULL, NULL, dev, NULL); 946 947 object_property_add(obj, "guest-stats-polling-interval", "int", 948 balloon_ccw_stats_get_poll_interval, 949 balloon_ccw_stats_set_poll_interval, 950 NULL, dev, NULL); 951 } 952 953 static void virtio_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) 954 { 955 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev); 956 DeviceState *vdev = DEVICE(&dev->vdev); 957 DeviceState *qdev = DEVICE(ccw_dev); 958 Error *err = NULL; 959 char *bus_name; 960 961 /* 962 * For command line compatibility, this sets the virtio-scsi-device bus 963 * name as before. 964 */ 965 if (qdev->id) { 966 bus_name = g_strdup_printf("%s.0", qdev->id); 967 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 968 g_free(bus_name); 969 } 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 virtio_ccw_scsi_instance_init(Object *obj) 982 { 983 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj); 984 985 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 986 TYPE_VIRTIO_SCSI); 987 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread", 988 &error_abort); 989 } 990 991 #ifdef CONFIG_VHOST_SCSI 992 static void vhost_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) 993 { 994 VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev); 995 DeviceState *vdev = DEVICE(&dev->vdev); 996 Error *err = NULL; 997 998 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 999 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 1000 if (err) { 1001 error_propagate(errp, err); 1002 return; 1003 } 1004 1005 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 1006 } 1007 1008 static void vhost_ccw_scsi_instance_init(Object *obj) 1009 { 1010 VHostSCSICcw *dev = VHOST_SCSI_CCW(obj); 1011 1012 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1013 TYPE_VHOST_SCSI); 1014 } 1015 #endif 1016 1017 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp) 1018 { 1019 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev); 1020 DeviceState *vdev = DEVICE(&dev->vdev); 1021 Error *err = NULL; 1022 1023 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 1024 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 1025 if (err) { 1026 error_propagate(errp, err); 1027 return; 1028 } 1029 1030 object_property_set_link(OBJECT(dev), 1031 OBJECT(dev->vdev.conf.rng), "rng", 1032 NULL); 1033 1034 virtio_ccw_device_realize(ccw_dev, VIRTIO_DEVICE(vdev), errp); 1035 } 1036 1037 /* DeviceState to VirtioCcwDevice. Note: used on datapath, 1038 * be careful and test performance if you change this. 1039 */ 1040 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) 1041 { 1042 return container_of(d, VirtioCcwDevice, parent_obj); 1043 } 1044 1045 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, 1046 uint8_t to_be_set) 1047 { 1048 uint8_t ind_old, ind_new; 1049 hwaddr len = 1; 1050 uint8_t *ind_addr; 1051 1052 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 1053 if (!ind_addr) { 1054 error_report("%s(%x.%x.%04x): unable to access indicator", 1055 __func__, sch->cssid, sch->ssid, sch->schid); 1056 return -1; 1057 } 1058 do { 1059 ind_old = *ind_addr; 1060 ind_new = ind_old | to_be_set; 1061 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 1062 cpu_physical_memory_unmap(ind_addr, len, 1, len); 1063 1064 return ind_old; 1065 } 1066 1067 static void virtio_ccw_notify(DeviceState *d, uint16_t vector) 1068 { 1069 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); 1070 SubchDev *sch = dev->sch; 1071 uint64_t indicators; 1072 1073 if (vector >= 128) { 1074 return; 1075 } 1076 1077 if (vector < VIRTIO_PCI_QUEUE_MAX) { 1078 if (!dev->indicators) { 1079 return; 1080 } 1081 if (sch->thinint_active) { 1082 /* 1083 * In the adapter interrupt case, indicators points to a 1084 * memory area that may be (way) larger than 64 bit and 1085 * ind_bit indicates the start of the indicators in a big 1086 * endian notation. 1087 */ 1088 uint64_t ind_bit = dev->routes.adapter.ind_offset; 1089 1090 virtio_set_ind_atomic(sch, dev->indicators->addr + 1091 (ind_bit + vector) / 8, 1092 0x80 >> ((ind_bit + vector) % 8)); 1093 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr, 1094 0x01)) { 1095 css_adapter_interrupt(dev->thinint_isc); 1096 } 1097 } else { 1098 indicators = address_space_ldq(&address_space_memory, 1099 dev->indicators->addr, 1100 MEMTXATTRS_UNSPECIFIED, 1101 NULL); 1102 indicators |= 1ULL << vector; 1103 address_space_stq(&address_space_memory, dev->indicators->addr, 1104 indicators, MEMTXATTRS_UNSPECIFIED, NULL); 1105 css_conditional_io_interrupt(sch); 1106 } 1107 } else { 1108 if (!dev->indicators2) { 1109 return; 1110 } 1111 vector = 0; 1112 indicators = address_space_ldq(&address_space_memory, 1113 dev->indicators2->addr, 1114 MEMTXATTRS_UNSPECIFIED, 1115 NULL); 1116 indicators |= 1ULL << vector; 1117 address_space_stq(&address_space_memory, dev->indicators2->addr, 1118 indicators, MEMTXATTRS_UNSPECIFIED, NULL); 1119 css_conditional_io_interrupt(sch); 1120 } 1121 } 1122 1123 static unsigned virtio_ccw_get_features(DeviceState *d) 1124 { 1125 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1126 1127 /* Only the first 32 feature bits are used. */ 1128 return dev->host_features[0]; 1129 } 1130 1131 static void virtio_ccw_reset(DeviceState *d) 1132 { 1133 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1134 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1135 1136 virtio_ccw_stop_ioeventfd(dev); 1137 virtio_reset(vdev); 1138 css_reset_sch(dev->sch); 1139 if (dev->indicators) { 1140 release_indicator(&dev->routes.adapter, dev->indicators); 1141 dev->indicators = NULL; 1142 } 1143 if (dev->indicators2) { 1144 release_indicator(&dev->routes.adapter, dev->indicators2); 1145 dev->indicators2 = NULL; 1146 } 1147 if (dev->summary_indicator) { 1148 release_indicator(&dev->routes.adapter, dev->summary_indicator); 1149 dev->summary_indicator = NULL; 1150 } 1151 } 1152 1153 static void virtio_ccw_vmstate_change(DeviceState *d, bool running) 1154 { 1155 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1156 1157 if (running) { 1158 virtio_ccw_start_ioeventfd(dev); 1159 } else { 1160 virtio_ccw_stop_ioeventfd(dev); 1161 } 1162 } 1163 1164 static bool virtio_ccw_query_guest_notifiers(DeviceState *d) 1165 { 1166 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1167 1168 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA); 1169 } 1170 1171 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign) 1172 { 1173 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1174 1175 /* Stop using the generic ioeventfd, we are doing eventfd handling 1176 * ourselves below */ 1177 dev->ioeventfd_disabled = assign; 1178 if (assign) { 1179 virtio_ccw_stop_ioeventfd(dev); 1180 } 1181 return virtio_ccw_set_guest2host_notifier(dev, n, assign, false); 1182 } 1183 1184 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev) 1185 { 1186 int r; 1187 1188 if (!dev->sch->thinint_active) { 1189 return -EINVAL; 1190 } 1191 1192 r = map_indicator(&dev->routes.adapter, dev->summary_indicator); 1193 if (r) { 1194 return r; 1195 } 1196 r = map_indicator(&dev->routes.adapter, dev->indicators); 1197 if (r) { 1198 return r; 1199 } 1200 dev->routes.adapter.summary_addr = dev->summary_indicator->map; 1201 dev->routes.adapter.ind_addr = dev->indicators->map; 1202 1203 return 0; 1204 } 1205 1206 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs) 1207 { 1208 int i; 1209 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1210 int ret; 1211 S390FLICState *fs = s390_get_flic(); 1212 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1213 1214 ret = virtio_ccw_get_mappings(dev); 1215 if (ret) { 1216 return ret; 1217 } 1218 for (i = 0; i < nvqs; i++) { 1219 if (!virtio_queue_get_num(vdev, i)) { 1220 break; 1221 } 1222 } 1223 dev->routes.num_routes = i; 1224 return fsc->add_adapter_routes(fs, &dev->routes); 1225 } 1226 1227 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs) 1228 { 1229 S390FLICState *fs = s390_get_flic(); 1230 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1231 1232 fsc->release_adapter_routes(fs, &dev->routes); 1233 } 1234 1235 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n) 1236 { 1237 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1238 VirtQueue *vq = virtio_get_queue(vdev, n); 1239 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1240 1241 return kvm_irqchip_add_irqfd_notifier(kvm_state, notifier, NULL, 1242 dev->routes.gsi[n]); 1243 } 1244 1245 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n) 1246 { 1247 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1248 VirtQueue *vq = virtio_get_queue(vdev, n); 1249 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1250 int ret; 1251 1252 ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, notifier, 1253 dev->routes.gsi[n]); 1254 assert(ret == 0); 1255 } 1256 1257 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n, 1258 bool assign, bool with_irqfd) 1259 { 1260 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1261 VirtQueue *vq = virtio_get_queue(vdev, n); 1262 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1263 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 1264 1265 if (assign) { 1266 int r = event_notifier_init(notifier, 0); 1267 1268 if (r < 0) { 1269 return r; 1270 } 1271 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 1272 if (with_irqfd) { 1273 r = virtio_ccw_add_irqfd(dev, n); 1274 if (r) { 1275 virtio_queue_set_guest_notifier_fd_handler(vq, false, 1276 with_irqfd); 1277 return r; 1278 } 1279 } 1280 /* 1281 * We do not support individual masking for channel devices, so we 1282 * need to manually trigger any guest masking callbacks here. 1283 */ 1284 if (k->guest_notifier_mask) { 1285 k->guest_notifier_mask(vdev, n, false); 1286 } 1287 /* get lost events and re-inject */ 1288 if (k->guest_notifier_pending && 1289 k->guest_notifier_pending(vdev, n)) { 1290 event_notifier_set(notifier); 1291 } 1292 } else { 1293 if (k->guest_notifier_mask) { 1294 k->guest_notifier_mask(vdev, n, true); 1295 } 1296 if (with_irqfd) { 1297 virtio_ccw_remove_irqfd(dev, n); 1298 } 1299 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 1300 event_notifier_cleanup(notifier); 1301 } 1302 return 0; 1303 } 1304 1305 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs, 1306 bool assigned) 1307 { 1308 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1309 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1310 bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled(); 1311 int r, n; 1312 1313 if (with_irqfd && assigned) { 1314 /* irq routes need to be set up before assigning irqfds */ 1315 r = virtio_ccw_setup_irqroutes(dev, nvqs); 1316 if (r < 0) { 1317 goto irqroute_error; 1318 } 1319 } 1320 for (n = 0; n < nvqs; n++) { 1321 if (!virtio_queue_get_num(vdev, n)) { 1322 break; 1323 } 1324 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd); 1325 if (r < 0) { 1326 goto assign_error; 1327 } 1328 } 1329 if (with_irqfd && !assigned) { 1330 /* release irq routes after irqfds have been released */ 1331 virtio_ccw_release_irqroutes(dev, nvqs); 1332 } 1333 return 0; 1334 1335 assign_error: 1336 while (--n >= 0) { 1337 virtio_ccw_set_guest_notifier(dev, n, !assigned, false); 1338 } 1339 irqroute_error: 1340 if (with_irqfd && assigned) { 1341 virtio_ccw_release_irqroutes(dev, nvqs); 1342 } 1343 return r; 1344 } 1345 1346 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f) 1347 { 1348 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1349 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1350 1351 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 1352 } 1353 1354 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f) 1355 { 1356 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1357 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1358 uint16_t vector; 1359 1360 qemu_get_be16s(f, &vector); 1361 virtio_queue_set_vector(vdev, n , vector); 1362 1363 return 0; 1364 } 1365 1366 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) 1367 { 1368 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1369 SubchDev *s = dev->sch; 1370 1371 subch_device_save(s, f); 1372 if (dev->indicators != NULL) { 1373 qemu_put_be32(f, dev->indicators->len); 1374 qemu_put_be64(f, dev->indicators->addr); 1375 } else { 1376 qemu_put_be32(f, 0); 1377 qemu_put_be64(f, 0UL); 1378 } 1379 if (dev->indicators2 != NULL) { 1380 qemu_put_be32(f, dev->indicators2->len); 1381 qemu_put_be64(f, dev->indicators2->addr); 1382 } else { 1383 qemu_put_be32(f, 0); 1384 qemu_put_be64(f, 0UL); 1385 } 1386 if (dev->summary_indicator != NULL) { 1387 qemu_put_be32(f, dev->summary_indicator->len); 1388 qemu_put_be64(f, dev->summary_indicator->addr); 1389 } else { 1390 qemu_put_be32(f, 0); 1391 qemu_put_be64(f, 0UL); 1392 } 1393 qemu_put_be64(f, dev->routes.adapter.ind_offset); 1394 qemu_put_byte(f, dev->thinint_isc); 1395 } 1396 1397 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) 1398 { 1399 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1400 SubchDev *s = dev->sch; 1401 int len; 1402 1403 s->driver_data = dev; 1404 subch_device_load(s, f); 1405 len = qemu_get_be32(f); 1406 if (len != 0) { 1407 dev->indicators = get_indicator(qemu_get_be64(f), len); 1408 } else { 1409 qemu_get_be64(f); 1410 dev->indicators = NULL; 1411 } 1412 len = qemu_get_be32(f); 1413 if (len != 0) { 1414 dev->indicators2 = get_indicator(qemu_get_be64(f), len); 1415 } else { 1416 qemu_get_be64(f); 1417 dev->indicators2 = NULL; 1418 } 1419 len = qemu_get_be32(f); 1420 if (len != 0) { 1421 dev->summary_indicator = get_indicator(qemu_get_be64(f), len); 1422 } else { 1423 qemu_get_be64(f); 1424 dev->summary_indicator = NULL; 1425 } 1426 dev->routes.adapter.ind_offset = qemu_get_be64(f); 1427 dev->thinint_isc = qemu_get_byte(f); 1428 if (s->thinint_active) { 1429 return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 1430 dev->thinint_isc, true, false, 1431 &dev->routes.adapter.adapter_id); 1432 } 1433 1434 return 0; 1435 } 1436 1437 /**************** Virtio-ccw Bus Device Descriptions *******************/ 1438 1439 static Property virtio_ccw_net_properties[] = { 1440 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1441 DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]), 1442 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1443 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1444 DEFINE_PROP_END_OF_LIST(), 1445 }; 1446 1447 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data) 1448 { 1449 DeviceClass *dc = DEVICE_CLASS(klass); 1450 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1451 1452 k->realize = virtio_ccw_net_realize; 1453 k->exit = virtio_ccw_exit; 1454 dc->reset = virtio_ccw_reset; 1455 dc->props = virtio_ccw_net_properties; 1456 } 1457 1458 static const TypeInfo virtio_ccw_net = { 1459 .name = TYPE_VIRTIO_NET_CCW, 1460 .parent = TYPE_VIRTIO_CCW_DEVICE, 1461 .instance_size = sizeof(VirtIONetCcw), 1462 .instance_init = virtio_ccw_net_instance_init, 1463 .class_init = virtio_ccw_net_class_init, 1464 }; 1465 1466 static Property virtio_ccw_blk_properties[] = { 1467 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1468 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1469 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1470 DEFINE_PROP_END_OF_LIST(), 1471 }; 1472 1473 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data) 1474 { 1475 DeviceClass *dc = DEVICE_CLASS(klass); 1476 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1477 1478 k->realize = virtio_ccw_blk_realize; 1479 k->exit = virtio_ccw_exit; 1480 dc->reset = virtio_ccw_reset; 1481 dc->props = virtio_ccw_blk_properties; 1482 } 1483 1484 static const TypeInfo virtio_ccw_blk = { 1485 .name = TYPE_VIRTIO_BLK_CCW, 1486 .parent = TYPE_VIRTIO_CCW_DEVICE, 1487 .instance_size = sizeof(VirtIOBlkCcw), 1488 .instance_init = virtio_ccw_blk_instance_init, 1489 .class_init = virtio_ccw_blk_class_init, 1490 }; 1491 1492 static Property virtio_ccw_serial_properties[] = { 1493 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1494 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1495 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1496 DEFINE_PROP_END_OF_LIST(), 1497 }; 1498 1499 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data) 1500 { 1501 DeviceClass *dc = DEVICE_CLASS(klass); 1502 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1503 1504 k->realize = virtio_ccw_serial_realize; 1505 k->exit = virtio_ccw_exit; 1506 dc->reset = virtio_ccw_reset; 1507 dc->props = virtio_ccw_serial_properties; 1508 } 1509 1510 static const TypeInfo virtio_ccw_serial = { 1511 .name = TYPE_VIRTIO_SERIAL_CCW, 1512 .parent = TYPE_VIRTIO_CCW_DEVICE, 1513 .instance_size = sizeof(VirtioSerialCcw), 1514 .instance_init = virtio_ccw_serial_instance_init, 1515 .class_init = virtio_ccw_serial_class_init, 1516 }; 1517 1518 static Property virtio_ccw_balloon_properties[] = { 1519 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1520 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1521 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1522 DEFINE_PROP_END_OF_LIST(), 1523 }; 1524 1525 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data) 1526 { 1527 DeviceClass *dc = DEVICE_CLASS(klass); 1528 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1529 1530 k->realize = virtio_ccw_balloon_realize; 1531 k->exit = virtio_ccw_exit; 1532 dc->reset = virtio_ccw_reset; 1533 dc->props = virtio_ccw_balloon_properties; 1534 } 1535 1536 static const TypeInfo virtio_ccw_balloon = { 1537 .name = TYPE_VIRTIO_BALLOON_CCW, 1538 .parent = TYPE_VIRTIO_CCW_DEVICE, 1539 .instance_size = sizeof(VirtIOBalloonCcw), 1540 .instance_init = virtio_ccw_balloon_instance_init, 1541 .class_init = virtio_ccw_balloon_class_init, 1542 }; 1543 1544 static Property virtio_ccw_scsi_properties[] = { 1545 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1546 DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]), 1547 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1548 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1549 DEFINE_PROP_END_OF_LIST(), 1550 }; 1551 1552 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data) 1553 { 1554 DeviceClass *dc = DEVICE_CLASS(klass); 1555 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1556 1557 k->realize = virtio_ccw_scsi_realize; 1558 k->exit = virtio_ccw_exit; 1559 dc->reset = virtio_ccw_reset; 1560 dc->props = virtio_ccw_scsi_properties; 1561 } 1562 1563 static const TypeInfo virtio_ccw_scsi = { 1564 .name = TYPE_VIRTIO_SCSI_CCW, 1565 .parent = TYPE_VIRTIO_CCW_DEVICE, 1566 .instance_size = sizeof(VirtIOSCSICcw), 1567 .instance_init = virtio_ccw_scsi_instance_init, 1568 .class_init = virtio_ccw_scsi_class_init, 1569 }; 1570 1571 #ifdef CONFIG_VHOST_SCSI 1572 static Property vhost_ccw_scsi_properties[] = { 1573 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1574 DEFINE_PROP_END_OF_LIST(), 1575 }; 1576 1577 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data) 1578 { 1579 DeviceClass *dc = DEVICE_CLASS(klass); 1580 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1581 1582 k->realize = vhost_ccw_scsi_realize; 1583 k->exit = virtio_ccw_exit; 1584 dc->reset = virtio_ccw_reset; 1585 dc->props = vhost_ccw_scsi_properties; 1586 } 1587 1588 static const TypeInfo vhost_ccw_scsi = { 1589 .name = TYPE_VHOST_SCSI_CCW, 1590 .parent = TYPE_VIRTIO_CCW_DEVICE, 1591 .instance_size = sizeof(VHostSCSICcw), 1592 .instance_init = vhost_ccw_scsi_instance_init, 1593 .class_init = vhost_ccw_scsi_class_init, 1594 }; 1595 #endif 1596 1597 static void virtio_ccw_rng_instance_init(Object *obj) 1598 { 1599 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj); 1600 1601 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1602 TYPE_VIRTIO_RNG); 1603 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), 1604 "rng", &error_abort); 1605 } 1606 1607 static Property virtio_ccw_rng_properties[] = { 1608 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 1609 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1610 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1611 DEFINE_PROP_END_OF_LIST(), 1612 }; 1613 1614 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data) 1615 { 1616 DeviceClass *dc = DEVICE_CLASS(klass); 1617 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1618 1619 k->realize = virtio_ccw_rng_realize; 1620 k->exit = virtio_ccw_exit; 1621 dc->reset = virtio_ccw_reset; 1622 dc->props = virtio_ccw_rng_properties; 1623 } 1624 1625 static const TypeInfo virtio_ccw_rng = { 1626 .name = TYPE_VIRTIO_RNG_CCW, 1627 .parent = TYPE_VIRTIO_CCW_DEVICE, 1628 .instance_size = sizeof(VirtIORNGCcw), 1629 .instance_init = virtio_ccw_rng_instance_init, 1630 .class_init = virtio_ccw_rng_class_init, 1631 }; 1632 1633 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp) 1634 { 1635 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1636 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1637 1638 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev); 1639 _info->realize(_dev, errp); 1640 } 1641 1642 static int virtio_ccw_busdev_exit(DeviceState *dev) 1643 { 1644 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1645 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1646 1647 return _info->exit(_dev); 1648 } 1649 1650 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev, 1651 DeviceState *dev, Error **errp) 1652 { 1653 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1654 SubchDev *sch = _dev->sch; 1655 1656 virtio_ccw_stop_ioeventfd(_dev); 1657 1658 /* 1659 * We should arrive here only for device_del, since we don't support 1660 * direct hot(un)plug of channels, but only through virtio. 1661 */ 1662 assert(sch != NULL); 1663 /* Subchannel is now disabled and no longer valid. */ 1664 sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA | 1665 PMCW_FLAGS_MASK_DNV); 1666 1667 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0); 1668 1669 object_unparent(OBJECT(dev)); 1670 } 1671 1672 static Property virtio_ccw_properties[] = { 1673 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]), 1674 DEFINE_PROP_END_OF_LIST(), 1675 }; 1676 1677 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) 1678 { 1679 DeviceClass *dc = DEVICE_CLASS(klass); 1680 1681 dc->props = virtio_ccw_properties; 1682 dc->realize = virtio_ccw_busdev_realize; 1683 dc->exit = virtio_ccw_busdev_exit; 1684 dc->bus_type = TYPE_VIRTUAL_CSS_BUS; 1685 } 1686 1687 static const TypeInfo virtio_ccw_device_info = { 1688 .name = TYPE_VIRTIO_CCW_DEVICE, 1689 .parent = TYPE_DEVICE, 1690 .instance_size = sizeof(VirtioCcwDevice), 1691 .class_init = virtio_ccw_device_class_init, 1692 .class_size = sizeof(VirtIOCCWDeviceClass), 1693 .abstract = true, 1694 }; 1695 1696 /***************** Virtual-css Bus Bridge Device ********************/ 1697 /* Only required to have the virtio bus as child in the system bus */ 1698 1699 static int virtual_css_bridge_init(SysBusDevice *dev) 1700 { 1701 /* nothing */ 1702 return 0; 1703 } 1704 1705 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data) 1706 { 1707 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 1708 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 1709 1710 k->init = virtual_css_bridge_init; 1711 hc->unplug = virtio_ccw_busdev_unplug; 1712 } 1713 1714 static const TypeInfo virtual_css_bridge_info = { 1715 .name = "virtual-css-bridge", 1716 .parent = TYPE_SYS_BUS_DEVICE, 1717 .instance_size = sizeof(SysBusDevice), 1718 .class_init = virtual_css_bridge_class_init, 1719 .interfaces = (InterfaceInfo[]) { 1720 { TYPE_HOTPLUG_HANDLER }, 1721 { } 1722 } 1723 }; 1724 1725 /* virtio-ccw-bus */ 1726 1727 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 1728 VirtioCcwDevice *dev) 1729 { 1730 DeviceState *qdev = DEVICE(dev); 1731 char virtio_bus_name[] = "virtio-bus"; 1732 1733 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS, 1734 qdev, virtio_bus_name); 1735 } 1736 1737 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data) 1738 { 1739 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1740 BusClass *bus_class = BUS_CLASS(klass); 1741 1742 bus_class->max_dev = 1; 1743 k->notify = virtio_ccw_notify; 1744 k->get_features = virtio_ccw_get_features; 1745 k->vmstate_change = virtio_ccw_vmstate_change; 1746 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers; 1747 k->set_host_notifier = virtio_ccw_set_host_notifier; 1748 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers; 1749 k->save_queue = virtio_ccw_save_queue; 1750 k->load_queue = virtio_ccw_load_queue; 1751 k->save_config = virtio_ccw_save_config; 1752 k->load_config = virtio_ccw_load_config; 1753 } 1754 1755 static const TypeInfo virtio_ccw_bus_info = { 1756 .name = TYPE_VIRTIO_CCW_BUS, 1757 .parent = TYPE_VIRTIO_BUS, 1758 .instance_size = sizeof(VirtioCcwBusState), 1759 .class_init = virtio_ccw_bus_class_init, 1760 }; 1761 1762 static void virtio_ccw_register(void) 1763 { 1764 type_register_static(&virtio_ccw_bus_info); 1765 type_register_static(&virtual_css_bus_info); 1766 type_register_static(&virtio_ccw_device_info); 1767 type_register_static(&virtio_ccw_serial); 1768 type_register_static(&virtio_ccw_blk); 1769 type_register_static(&virtio_ccw_net); 1770 type_register_static(&virtio_ccw_balloon); 1771 type_register_static(&virtio_ccw_scsi); 1772 #ifdef CONFIG_VHOST_SCSI 1773 type_register_static(&vhost_ccw_scsi); 1774 #endif 1775 type_register_static(&virtio_ccw_rng); 1776 type_register_static(&virtual_css_bridge_info); 1777 } 1778 1779 type_init(virtio_ccw_register) 1780