1 /* 2 * virtio ccw target implementation 3 * 4 * Copyright 2012,2015 IBM Corp. 5 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> 6 * Pierre Morel <pmorel@linux.vnet.ibm.com> 7 * 8 * This work is licensed under the terms of the GNU GPL, version 2 or (at 9 * your option) any later version. See the COPYING file in the top-level 10 * directory. 11 */ 12 13 #include "qemu/osdep.h" 14 #include "qapi/error.h" 15 #include "hw/hw.h" 16 #include "sysemu/block-backend.h" 17 #include "sysemu/blockdev.h" 18 #include "sysemu/sysemu.h" 19 #include "sysemu/kvm.h" 20 #include "net/net.h" 21 #include "hw/virtio/virtio.h" 22 #include "hw/virtio/virtio-serial.h" 23 #include "hw/virtio/virtio-net.h" 24 #include "hw/sysbus.h" 25 #include "qemu/bitops.h" 26 #include "qemu/error-report.h" 27 #include "hw/virtio/virtio-access.h" 28 #include "hw/virtio/virtio-bus.h" 29 #include "hw/s390x/adapter.h" 30 #include "hw/s390x/s390_flic.h" 31 32 #include "hw/s390x/ioinst.h" 33 #include "hw/s390x/css.h" 34 #include "virtio-ccw.h" 35 #include "trace.h" 36 #include "hw/s390x/css-bridge.h" 37 38 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 39 VirtioCcwDevice *dev); 40 41 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch) 42 { 43 VirtIODevice *vdev = NULL; 44 VirtioCcwDevice *dev = sch->driver_data; 45 46 if (dev) { 47 vdev = virtio_bus_get_device(&dev->bus); 48 } 49 return vdev; 50 } 51 52 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev) 53 { 54 virtio_bus_start_ioeventfd(&dev->bus); 55 } 56 57 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev) 58 { 59 virtio_bus_stop_ioeventfd(&dev->bus); 60 } 61 62 static bool virtio_ccw_ioeventfd_started(DeviceState *d) 63 { 64 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 65 66 return dev->ioeventfd_started; 67 } 68 69 static void virtio_ccw_ioeventfd_set_started(DeviceState *d, bool started, 70 bool err) 71 { 72 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 73 74 dev->ioeventfd_started = started; 75 if (err) { 76 /* Disable ioeventfd for this device. */ 77 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; 78 } 79 } 80 81 static bool virtio_ccw_ioeventfd_disabled(DeviceState *d) 82 { 83 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 84 85 return dev->ioeventfd_disabled || 86 !(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD); 87 } 88 89 static void virtio_ccw_ioeventfd_set_disabled(DeviceState *d, bool disabled) 90 { 91 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 92 93 dev->ioeventfd_disabled = disabled; 94 } 95 96 static int virtio_ccw_ioeventfd_assign(DeviceState *d, EventNotifier *notifier, 97 int n, bool assign) 98 { 99 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 100 CcwDevice *ccw_dev = CCW_DEVICE(dev); 101 SubchDev *sch = ccw_dev->sch; 102 uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid; 103 104 return s390_assign_subch_ioeventfd(notifier, sch_id, n, assign); 105 } 106 107 /* Communication blocks used by several channel commands. */ 108 typedef struct VqInfoBlockLegacy { 109 uint64_t queue; 110 uint32_t align; 111 uint16_t index; 112 uint16_t num; 113 } QEMU_PACKED VqInfoBlockLegacy; 114 115 typedef struct VqInfoBlock { 116 uint64_t desc; 117 uint32_t res0; 118 uint16_t index; 119 uint16_t num; 120 uint64_t avail; 121 uint64_t used; 122 } QEMU_PACKED VqInfoBlock; 123 124 typedef struct VqConfigBlock { 125 uint16_t index; 126 uint16_t num_max; 127 } QEMU_PACKED VqConfigBlock; 128 129 typedef struct VirtioFeatDesc { 130 uint32_t features; 131 uint8_t index; 132 } QEMU_PACKED VirtioFeatDesc; 133 134 typedef struct VirtioThinintInfo { 135 hwaddr summary_indicator; 136 hwaddr device_indicator; 137 uint64_t ind_bit; 138 uint8_t isc; 139 } QEMU_PACKED VirtioThinintInfo; 140 141 typedef struct VirtioRevInfo { 142 uint16_t revision; 143 uint16_t length; 144 uint8_t data[0]; 145 } QEMU_PACKED VirtioRevInfo; 146 147 /* Specify where the virtqueues for the subchannel are in guest memory. */ 148 static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info, 149 VqInfoBlockLegacy *linfo) 150 { 151 VirtIODevice *vdev = virtio_ccw_get_vdev(sch); 152 uint16_t index = info ? info->index : linfo->index; 153 uint16_t num = info ? info->num : linfo->num; 154 uint64_t desc = info ? info->desc : linfo->queue; 155 156 if (index >= VIRTIO_CCW_QUEUE_MAX) { 157 return -EINVAL; 158 } 159 160 /* Current code in virtio.c relies on 4K alignment. */ 161 if (linfo && desc && (linfo->align != 4096)) { 162 return -EINVAL; 163 } 164 165 if (!vdev) { 166 return -EINVAL; 167 } 168 169 if (info) { 170 virtio_queue_set_rings(vdev, index, desc, info->avail, info->used); 171 } else { 172 virtio_queue_set_addr(vdev, index, desc); 173 } 174 if (!desc) { 175 virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR); 176 } else { 177 if (info) { 178 /* virtio-1 allows changing the ring size. */ 179 if (virtio_queue_get_num(vdev, index) < num) { 180 /* Fail if we exceed the maximum number. */ 181 return -EINVAL; 182 } 183 virtio_queue_set_num(vdev, index, num); 184 } else if (virtio_queue_get_num(vdev, index) > num) { 185 /* Fail if we don't have a big enough queue. */ 186 return -EINVAL; 187 } 188 /* We ignore possible increased num for legacy for compatibility. */ 189 virtio_queue_set_vector(vdev, index, index); 190 } 191 /* tell notify handler in case of config change */ 192 vdev->config_vector = VIRTIO_CCW_QUEUE_MAX; 193 return 0; 194 } 195 196 static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev) 197 { 198 CcwDevice *ccw_dev = CCW_DEVICE(dev); 199 200 virtio_ccw_stop_ioeventfd(dev); 201 virtio_reset(vdev); 202 if (dev->indicators) { 203 release_indicator(&dev->routes.adapter, dev->indicators); 204 dev->indicators = NULL; 205 } 206 if (dev->indicators2) { 207 release_indicator(&dev->routes.adapter, dev->indicators2); 208 dev->indicators2 = NULL; 209 } 210 if (dev->summary_indicator) { 211 release_indicator(&dev->routes.adapter, dev->summary_indicator); 212 dev->summary_indicator = NULL; 213 } 214 ccw_dev->sch->thinint_active = false; 215 } 216 217 static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len, 218 bool is_legacy) 219 { 220 int ret; 221 VqInfoBlock info; 222 VqInfoBlockLegacy linfo; 223 size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info); 224 225 if (check_len) { 226 if (ccw.count != info_len) { 227 return -EINVAL; 228 } 229 } else if (ccw.count < info_len) { 230 /* Can't execute command. */ 231 return -EINVAL; 232 } 233 if (!ccw.cda) { 234 return -EFAULT; 235 } 236 if (is_legacy) { 237 linfo.queue = address_space_ldq_be(&address_space_memory, ccw.cda, 238 MEMTXATTRS_UNSPECIFIED, NULL); 239 linfo.align = address_space_ldl_be(&address_space_memory, 240 ccw.cda + sizeof(linfo.queue), 241 MEMTXATTRS_UNSPECIFIED, 242 NULL); 243 linfo.index = address_space_lduw_be(&address_space_memory, 244 ccw.cda + sizeof(linfo.queue) 245 + sizeof(linfo.align), 246 MEMTXATTRS_UNSPECIFIED, 247 NULL); 248 linfo.num = address_space_lduw_be(&address_space_memory, 249 ccw.cda + sizeof(linfo.queue) 250 + sizeof(linfo.align) 251 + sizeof(linfo.index), 252 MEMTXATTRS_UNSPECIFIED, 253 NULL); 254 ret = virtio_ccw_set_vqs(sch, NULL, &linfo); 255 } else { 256 info.desc = address_space_ldq_be(&address_space_memory, ccw.cda, 257 MEMTXATTRS_UNSPECIFIED, NULL); 258 info.index = address_space_lduw_be(&address_space_memory, 259 ccw.cda + sizeof(info.desc) 260 + sizeof(info.res0), 261 MEMTXATTRS_UNSPECIFIED, NULL); 262 info.num = address_space_lduw_be(&address_space_memory, 263 ccw.cda + sizeof(info.desc) 264 + sizeof(info.res0) 265 + sizeof(info.index), 266 MEMTXATTRS_UNSPECIFIED, NULL); 267 info.avail = address_space_ldq_be(&address_space_memory, 268 ccw.cda + sizeof(info.desc) 269 + sizeof(info.res0) 270 + sizeof(info.index) 271 + sizeof(info.num), 272 MEMTXATTRS_UNSPECIFIED, NULL); 273 info.used = address_space_ldq_be(&address_space_memory, 274 ccw.cda + sizeof(info.desc) 275 + sizeof(info.res0) 276 + sizeof(info.index) 277 + sizeof(info.num) 278 + sizeof(info.avail), 279 MEMTXATTRS_UNSPECIFIED, NULL); 280 ret = virtio_ccw_set_vqs(sch, &info, NULL); 281 } 282 sch->curr_status.scsw.count = 0; 283 return ret; 284 } 285 286 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) 287 { 288 int ret; 289 VirtioRevInfo revinfo; 290 uint8_t status; 291 VirtioFeatDesc features; 292 void *config; 293 hwaddr indicators; 294 VqConfigBlock vq_config; 295 VirtioCcwDevice *dev = sch->driver_data; 296 VirtIODevice *vdev = virtio_ccw_get_vdev(sch); 297 bool check_len; 298 int len; 299 hwaddr hw_len; 300 VirtioThinintInfo *thinint; 301 302 if (!dev) { 303 return -EINVAL; 304 } 305 306 trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid, 307 ccw.cmd_code); 308 check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC)); 309 310 /* Look at the command. */ 311 switch (ccw.cmd_code) { 312 case CCW_CMD_SET_VQ: 313 ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1); 314 break; 315 case CCW_CMD_VDEV_RESET: 316 virtio_ccw_reset_virtio(dev, vdev); 317 ret = 0; 318 break; 319 case CCW_CMD_READ_FEAT: 320 if (check_len) { 321 if (ccw.count != sizeof(features)) { 322 ret = -EINVAL; 323 break; 324 } 325 } else if (ccw.count < sizeof(features)) { 326 /* Can't execute command. */ 327 ret = -EINVAL; 328 break; 329 } 330 if (!ccw.cda) { 331 ret = -EFAULT; 332 } else { 333 features.index = address_space_ldub(&address_space_memory, 334 ccw.cda 335 + sizeof(features.features), 336 MEMTXATTRS_UNSPECIFIED, 337 NULL); 338 if (features.index == 0) { 339 if (dev->revision >= 1) { 340 /* Don't offer legacy features for modern devices. */ 341 features.features = (uint32_t) 342 (vdev->host_features & ~VIRTIO_LEGACY_FEATURES); 343 } else { 344 features.features = (uint32_t)vdev->host_features; 345 } 346 } else if ((features.index == 1) && (dev->revision >= 1)) { 347 /* 348 * Only offer feature bits beyond 31 if the guest has 349 * negotiated at least revision 1. 350 */ 351 features.features = (uint32_t)(vdev->host_features >> 32); 352 } else { 353 /* Return zeroes if the guest supports more feature bits. */ 354 features.features = 0; 355 } 356 address_space_stl_le(&address_space_memory, ccw.cda, 357 features.features, MEMTXATTRS_UNSPECIFIED, 358 NULL); 359 sch->curr_status.scsw.count = ccw.count - sizeof(features); 360 ret = 0; 361 } 362 break; 363 case CCW_CMD_WRITE_FEAT: 364 if (check_len) { 365 if (ccw.count != sizeof(features)) { 366 ret = -EINVAL; 367 break; 368 } 369 } else if (ccw.count < sizeof(features)) { 370 /* Can't execute command. */ 371 ret = -EINVAL; 372 break; 373 } 374 if (!ccw.cda) { 375 ret = -EFAULT; 376 } else { 377 features.index = address_space_ldub(&address_space_memory, 378 ccw.cda 379 + sizeof(features.features), 380 MEMTXATTRS_UNSPECIFIED, 381 NULL); 382 features.features = address_space_ldl_le(&address_space_memory, 383 ccw.cda, 384 MEMTXATTRS_UNSPECIFIED, 385 NULL); 386 if (features.index == 0) { 387 virtio_set_features(vdev, 388 (vdev->guest_features & 0xffffffff00000000ULL) | 389 features.features); 390 } else if ((features.index == 1) && (dev->revision >= 1)) { 391 /* 392 * If the guest did not negotiate at least revision 1, 393 * we did not offer it any feature bits beyond 31. Such a 394 * guest passing us any bit here is therefore buggy. 395 */ 396 virtio_set_features(vdev, 397 (vdev->guest_features & 0x00000000ffffffffULL) | 398 ((uint64_t)features.features << 32)); 399 } else { 400 /* 401 * If the guest supports more feature bits, assert that it 402 * passes us zeroes for those we don't support. 403 */ 404 if (features.features) { 405 fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n", 406 features.index, features.features); 407 /* XXX: do a unit check here? */ 408 } 409 } 410 sch->curr_status.scsw.count = ccw.count - sizeof(features); 411 ret = 0; 412 } 413 break; 414 case CCW_CMD_READ_CONF: 415 if (check_len) { 416 if (ccw.count > vdev->config_len) { 417 ret = -EINVAL; 418 break; 419 } 420 } 421 len = MIN(ccw.count, vdev->config_len); 422 if (!ccw.cda) { 423 ret = -EFAULT; 424 } else { 425 virtio_bus_get_vdev_config(&dev->bus, vdev->config); 426 /* XXX config space endianness */ 427 cpu_physical_memory_write(ccw.cda, vdev->config, len); 428 sch->curr_status.scsw.count = ccw.count - len; 429 ret = 0; 430 } 431 break; 432 case CCW_CMD_WRITE_CONF: 433 if (check_len) { 434 if (ccw.count > vdev->config_len) { 435 ret = -EINVAL; 436 break; 437 } 438 } 439 len = MIN(ccw.count, vdev->config_len); 440 hw_len = len; 441 if (!ccw.cda) { 442 ret = -EFAULT; 443 } else { 444 config = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 445 if (!config) { 446 ret = -EFAULT; 447 } else { 448 len = hw_len; 449 /* XXX config space endianness */ 450 memcpy(vdev->config, config, len); 451 cpu_physical_memory_unmap(config, hw_len, 0, hw_len); 452 virtio_bus_set_vdev_config(&dev->bus, vdev->config); 453 sch->curr_status.scsw.count = ccw.count - len; 454 ret = 0; 455 } 456 } 457 break; 458 case CCW_CMD_READ_STATUS: 459 if (check_len) { 460 if (ccw.count != sizeof(status)) { 461 ret = -EINVAL; 462 break; 463 } 464 } else if (ccw.count < sizeof(status)) { 465 /* Can't execute command. */ 466 ret = -EINVAL; 467 break; 468 } 469 if (!ccw.cda) { 470 ret = -EFAULT; 471 } else { 472 address_space_stb(&address_space_memory, ccw.cda, vdev->status, 473 MEMTXATTRS_UNSPECIFIED, NULL); 474 sch->curr_status.scsw.count = ccw.count - sizeof(vdev->status);; 475 ret = 0; 476 } 477 break; 478 case CCW_CMD_WRITE_STATUS: 479 if (check_len) { 480 if (ccw.count != sizeof(status)) { 481 ret = -EINVAL; 482 break; 483 } 484 } else if (ccw.count < sizeof(status)) { 485 /* Can't execute command. */ 486 ret = -EINVAL; 487 break; 488 } 489 if (!ccw.cda) { 490 ret = -EFAULT; 491 } else { 492 status = address_space_ldub(&address_space_memory, ccw.cda, 493 MEMTXATTRS_UNSPECIFIED, NULL); 494 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { 495 virtio_ccw_stop_ioeventfd(dev); 496 } 497 if (virtio_set_status(vdev, status) == 0) { 498 if (vdev->status == 0) { 499 virtio_ccw_reset_virtio(dev, vdev); 500 } 501 if (status & VIRTIO_CONFIG_S_DRIVER_OK) { 502 virtio_ccw_start_ioeventfd(dev); 503 } 504 sch->curr_status.scsw.count = ccw.count - sizeof(status); 505 ret = 0; 506 } else { 507 /* Trigger a command reject. */ 508 ret = -ENOSYS; 509 } 510 } 511 break; 512 case CCW_CMD_SET_IND: 513 if (check_len) { 514 if (ccw.count != sizeof(indicators)) { 515 ret = -EINVAL; 516 break; 517 } 518 } else if (ccw.count < sizeof(indicators)) { 519 /* Can't execute command. */ 520 ret = -EINVAL; 521 break; 522 } 523 if (sch->thinint_active) { 524 /* Trigger a command reject. */ 525 ret = -ENOSYS; 526 break; 527 } 528 if (!ccw.cda) { 529 ret = -EFAULT; 530 } else { 531 indicators = address_space_ldq_be(&address_space_memory, ccw.cda, 532 MEMTXATTRS_UNSPECIFIED, NULL); 533 dev->indicators = 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_SET_CONF_IND: 539 if (check_len) { 540 if (ccw.count != sizeof(indicators)) { 541 ret = -EINVAL; 542 break; 543 } 544 } else if (ccw.count < sizeof(indicators)) { 545 /* Can't execute command. */ 546 ret = -EINVAL; 547 break; 548 } 549 if (!ccw.cda) { 550 ret = -EFAULT; 551 } else { 552 indicators = address_space_ldq_be(&address_space_memory, ccw.cda, 553 MEMTXATTRS_UNSPECIFIED, NULL); 554 dev->indicators2 = get_indicator(indicators, sizeof(uint64_t)); 555 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 556 ret = 0; 557 } 558 break; 559 case CCW_CMD_READ_VQ_CONF: 560 if (check_len) { 561 if (ccw.count != sizeof(vq_config)) { 562 ret = -EINVAL; 563 break; 564 } 565 } else if (ccw.count < sizeof(vq_config)) { 566 /* Can't execute command. */ 567 ret = -EINVAL; 568 break; 569 } 570 if (!ccw.cda) { 571 ret = -EFAULT; 572 } else { 573 vq_config.index = address_space_lduw_be(&address_space_memory, 574 ccw.cda, 575 MEMTXATTRS_UNSPECIFIED, 576 NULL); 577 if (vq_config.index >= VIRTIO_CCW_QUEUE_MAX) { 578 ret = -EINVAL; 579 break; 580 } 581 vq_config.num_max = virtio_queue_get_num(vdev, 582 vq_config.index); 583 address_space_stw_be(&address_space_memory, 584 ccw.cda + sizeof(vq_config.index), 585 vq_config.num_max, 586 MEMTXATTRS_UNSPECIFIED, 587 NULL); 588 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config); 589 ret = 0; 590 } 591 break; 592 case CCW_CMD_SET_IND_ADAPTER: 593 if (check_len) { 594 if (ccw.count != sizeof(*thinint)) { 595 ret = -EINVAL; 596 break; 597 } 598 } else if (ccw.count < sizeof(*thinint)) { 599 /* Can't execute command. */ 600 ret = -EINVAL; 601 break; 602 } 603 len = sizeof(*thinint); 604 hw_len = len; 605 if (!ccw.cda) { 606 ret = -EFAULT; 607 } else if (dev->indicators && !sch->thinint_active) { 608 /* Trigger a command reject. */ 609 ret = -ENOSYS; 610 } else { 611 thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 612 if (!thinint) { 613 ret = -EFAULT; 614 } else { 615 uint64_t ind_bit = ldq_be_p(&thinint->ind_bit); 616 617 len = hw_len; 618 dev->summary_indicator = 619 get_indicator(ldq_be_p(&thinint->summary_indicator), 620 sizeof(uint8_t)); 621 dev->indicators = 622 get_indicator(ldq_be_p(&thinint->device_indicator), 623 ind_bit / 8 + 1); 624 dev->thinint_isc = thinint->isc; 625 dev->routes.adapter.ind_offset = ind_bit; 626 dev->routes.adapter.summary_offset = 7; 627 cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len); 628 ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 629 dev->thinint_isc, true, false, 630 &dev->routes.adapter.adapter_id); 631 assert(ret == 0); 632 sch->thinint_active = ((dev->indicators != NULL) && 633 (dev->summary_indicator != NULL)); 634 sch->curr_status.scsw.count = ccw.count - len; 635 ret = 0; 636 } 637 } 638 break; 639 case CCW_CMD_SET_VIRTIO_REV: 640 len = sizeof(revinfo); 641 if (ccw.count < len) { 642 ret = -EINVAL; 643 break; 644 } 645 if (!ccw.cda) { 646 ret = -EFAULT; 647 break; 648 } 649 revinfo.revision = 650 address_space_lduw_be(&address_space_memory, ccw.cda, 651 MEMTXATTRS_UNSPECIFIED, NULL); 652 revinfo.length = 653 address_space_lduw_be(&address_space_memory, 654 ccw.cda + sizeof(revinfo.revision), 655 MEMTXATTRS_UNSPECIFIED, NULL); 656 if (ccw.count < len + revinfo.length || 657 (check_len && ccw.count > len + revinfo.length)) { 658 ret = -EINVAL; 659 break; 660 } 661 /* 662 * Once we start to support revisions with additional data, we'll 663 * need to fetch it here. Nothing to do for now, though. 664 */ 665 if (dev->revision >= 0 || 666 revinfo.revision > virtio_ccw_rev_max(dev)) { 667 ret = -ENOSYS; 668 break; 669 } 670 ret = 0; 671 dev->revision = revinfo.revision; 672 break; 673 default: 674 ret = -ENOSYS; 675 break; 676 } 677 return ret; 678 } 679 680 static void virtio_sch_disable_cb(SubchDev *sch) 681 { 682 VirtioCcwDevice *dev = sch->driver_data; 683 684 dev->revision = -1; 685 } 686 687 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) 688 { 689 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 690 CcwDevice *ccw_dev = CCW_DEVICE(dev); 691 SubchDev *sch = css_create_virtual_sch(ccw_dev->bus_id, errp); 692 Error *err = NULL; 693 694 if (!sch) { 695 return; 696 } 697 698 sch->driver_data = dev; 699 sch->ccw_cb = virtio_ccw_cb; 700 sch->disable_cb = virtio_sch_disable_cb; 701 sch->id.reserved = 0xff; 702 sch->id.cu_type = VIRTIO_CCW_CU_TYPE; 703 ccw_dev->sch = sch; 704 dev->indicators = NULL; 705 dev->revision = -1; 706 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); 707 708 trace_virtio_ccw_new_device( 709 sch->cssid, sch->ssid, sch->schid, sch->devno, 710 ccw_dev->bus_id.valid ? "user-configured" : "auto-configured"); 711 712 if (k->realize) { 713 k->realize(dev, &err); 714 } 715 if (err) { 716 error_propagate(errp, err); 717 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 718 ccw_dev->sch = NULL; 719 g_free(sch); 720 } 721 } 722 723 static int virtio_ccw_exit(VirtioCcwDevice *dev) 724 { 725 CcwDevice *ccw_dev = CCW_DEVICE(dev); 726 SubchDev *sch = ccw_dev->sch; 727 728 if (sch) { 729 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 730 g_free(sch); 731 } 732 if (dev->indicators) { 733 release_indicator(&dev->routes.adapter, dev->indicators); 734 dev->indicators = NULL; 735 } 736 return 0; 737 } 738 739 static void virtio_ccw_net_realize(VirtioCcwDevice *ccw_dev, Error **errp) 740 { 741 DeviceState *qdev = DEVICE(ccw_dev); 742 VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev); 743 DeviceState *vdev = DEVICE(&dev->vdev); 744 745 virtio_net_set_netclient_name(&dev->vdev, qdev->id, 746 object_get_typename(OBJECT(qdev))); 747 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 748 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 749 } 750 751 static void virtio_ccw_net_instance_init(Object *obj) 752 { 753 VirtIONetCcw *dev = VIRTIO_NET_CCW(obj); 754 755 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 756 TYPE_VIRTIO_NET); 757 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 758 "bootindex", &error_abort); 759 } 760 761 static void virtio_ccw_blk_realize(VirtioCcwDevice *ccw_dev, Error **errp) 762 { 763 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev); 764 DeviceState *vdev = DEVICE(&dev->vdev); 765 766 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 767 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 768 } 769 770 static void virtio_ccw_blk_instance_init(Object *obj) 771 { 772 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj); 773 774 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 775 TYPE_VIRTIO_BLK); 776 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread", 777 &error_abort); 778 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), 779 "bootindex", &error_abort); 780 } 781 782 static void virtio_ccw_serial_realize(VirtioCcwDevice *ccw_dev, Error **errp) 783 { 784 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev); 785 DeviceState *vdev = DEVICE(&dev->vdev); 786 DeviceState *proxy = DEVICE(ccw_dev); 787 char *bus_name; 788 789 /* 790 * For command line compatibility, this sets the virtio-serial-device bus 791 * name as before. 792 */ 793 if (proxy->id) { 794 bus_name = g_strdup_printf("%s.0", proxy->id); 795 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 796 g_free(bus_name); 797 } 798 799 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 800 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 801 } 802 803 804 static void virtio_ccw_serial_instance_init(Object *obj) 805 { 806 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj); 807 808 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 809 TYPE_VIRTIO_SERIAL); 810 } 811 812 static void virtio_ccw_balloon_realize(VirtioCcwDevice *ccw_dev, Error **errp) 813 { 814 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev); 815 DeviceState *vdev = DEVICE(&dev->vdev); 816 817 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 818 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 819 } 820 821 static void virtio_ccw_balloon_instance_init(Object *obj) 822 { 823 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj); 824 825 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 826 TYPE_VIRTIO_BALLOON); 827 object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev), 828 "guest-stats", &error_abort); 829 object_property_add_alias(obj, "guest-stats-polling-interval", 830 OBJECT(&dev->vdev), 831 "guest-stats-polling-interval", &error_abort); 832 } 833 834 static void virtio_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) 835 { 836 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev); 837 DeviceState *vdev = DEVICE(&dev->vdev); 838 DeviceState *qdev = DEVICE(ccw_dev); 839 char *bus_name; 840 841 /* 842 * For command line compatibility, this sets the virtio-scsi-device bus 843 * name as before. 844 */ 845 if (qdev->id) { 846 bus_name = g_strdup_printf("%s.0", qdev->id); 847 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name); 848 g_free(bus_name); 849 } 850 851 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 852 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 853 } 854 855 static void virtio_ccw_scsi_instance_init(Object *obj) 856 { 857 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj); 858 859 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 860 TYPE_VIRTIO_SCSI); 861 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread", 862 &error_abort); 863 } 864 865 #ifdef CONFIG_VHOST_SCSI 866 static void vhost_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp) 867 { 868 VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev); 869 DeviceState *vdev = DEVICE(&dev->vdev); 870 871 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 872 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 873 } 874 875 static void vhost_ccw_scsi_instance_init(Object *obj) 876 { 877 VHostSCSICcw *dev = VHOST_SCSI_CCW(obj); 878 879 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 880 TYPE_VHOST_SCSI); 881 } 882 #endif 883 884 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp) 885 { 886 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev); 887 DeviceState *vdev = DEVICE(&dev->vdev); 888 Error *err = NULL; 889 890 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 891 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 892 if (err) { 893 error_propagate(errp, err); 894 return; 895 } 896 897 object_property_set_link(OBJECT(dev), 898 OBJECT(dev->vdev.conf.rng), "rng", 899 NULL); 900 } 901 902 /* DeviceState to VirtioCcwDevice. Note: used on datapath, 903 * be careful and test performance if you change this. 904 */ 905 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) 906 { 907 CcwDevice *ccw_dev = to_ccw_dev_fast(d); 908 909 return container_of(ccw_dev, VirtioCcwDevice, parent_obj); 910 } 911 912 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc, 913 uint8_t to_be_set) 914 { 915 uint8_t ind_old, ind_new; 916 hwaddr len = 1; 917 uint8_t *ind_addr; 918 919 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 920 if (!ind_addr) { 921 error_report("%s(%x.%x.%04x): unable to access indicator", 922 __func__, sch->cssid, sch->ssid, sch->schid); 923 return -1; 924 } 925 do { 926 ind_old = *ind_addr; 927 ind_new = ind_old | to_be_set; 928 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 929 trace_virtio_ccw_set_ind(ind_loc, ind_old, ind_new); 930 cpu_physical_memory_unmap(ind_addr, len, 1, len); 931 932 return ind_old; 933 } 934 935 static void virtio_ccw_notify(DeviceState *d, uint16_t vector) 936 { 937 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); 938 CcwDevice *ccw_dev = to_ccw_dev_fast(d); 939 SubchDev *sch = ccw_dev->sch; 940 uint64_t indicators; 941 942 /* queue indicators + secondary indicators */ 943 if (vector >= VIRTIO_CCW_QUEUE_MAX + 64) { 944 return; 945 } 946 947 if (vector < VIRTIO_CCW_QUEUE_MAX) { 948 if (!dev->indicators) { 949 return; 950 } 951 if (sch->thinint_active) { 952 /* 953 * In the adapter interrupt case, indicators points to a 954 * memory area that may be (way) larger than 64 bit and 955 * ind_bit indicates the start of the indicators in a big 956 * endian notation. 957 */ 958 uint64_t ind_bit = dev->routes.adapter.ind_offset; 959 960 virtio_set_ind_atomic(sch, dev->indicators->addr + 961 (ind_bit + vector) / 8, 962 0x80 >> ((ind_bit + vector) % 8)); 963 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr, 964 0x01)) { 965 css_adapter_interrupt(dev->thinint_isc); 966 } 967 } else { 968 indicators = address_space_ldq(&address_space_memory, 969 dev->indicators->addr, 970 MEMTXATTRS_UNSPECIFIED, 971 NULL); 972 indicators |= 1ULL << vector; 973 address_space_stq(&address_space_memory, dev->indicators->addr, 974 indicators, MEMTXATTRS_UNSPECIFIED, NULL); 975 css_conditional_io_interrupt(sch); 976 } 977 } else { 978 if (!dev->indicators2) { 979 return; 980 } 981 vector = 0; 982 indicators = address_space_ldq(&address_space_memory, 983 dev->indicators2->addr, 984 MEMTXATTRS_UNSPECIFIED, 985 NULL); 986 indicators |= 1ULL << vector; 987 address_space_stq(&address_space_memory, dev->indicators2->addr, 988 indicators, MEMTXATTRS_UNSPECIFIED, NULL); 989 css_conditional_io_interrupt(sch); 990 } 991 } 992 993 static void virtio_ccw_reset(DeviceState *d) 994 { 995 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 996 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 997 CcwDevice *ccw_dev = CCW_DEVICE(d); 998 999 virtio_ccw_reset_virtio(dev, vdev); 1000 css_reset_sch(ccw_dev->sch); 1001 } 1002 1003 static void virtio_ccw_vmstate_change(DeviceState *d, bool running) 1004 { 1005 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1006 1007 if (running) { 1008 virtio_ccw_start_ioeventfd(dev); 1009 } else { 1010 virtio_ccw_stop_ioeventfd(dev); 1011 } 1012 } 1013 1014 static bool virtio_ccw_query_guest_notifiers(DeviceState *d) 1015 { 1016 CcwDevice *dev = CCW_DEVICE(d); 1017 1018 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA); 1019 } 1020 1021 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev) 1022 { 1023 int r; 1024 CcwDevice *ccw_dev = CCW_DEVICE(dev); 1025 1026 if (!ccw_dev->sch->thinint_active) { 1027 return -EINVAL; 1028 } 1029 1030 r = map_indicator(&dev->routes.adapter, dev->summary_indicator); 1031 if (r) { 1032 return r; 1033 } 1034 r = map_indicator(&dev->routes.adapter, dev->indicators); 1035 if (r) { 1036 return r; 1037 } 1038 dev->routes.adapter.summary_addr = dev->summary_indicator->map; 1039 dev->routes.adapter.ind_addr = dev->indicators->map; 1040 1041 return 0; 1042 } 1043 1044 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs) 1045 { 1046 int i; 1047 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1048 int ret; 1049 S390FLICState *fs = s390_get_flic(); 1050 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1051 1052 ret = virtio_ccw_get_mappings(dev); 1053 if (ret) { 1054 return ret; 1055 } 1056 for (i = 0; i < nvqs; i++) { 1057 if (!virtio_queue_get_num(vdev, i)) { 1058 break; 1059 } 1060 } 1061 dev->routes.num_routes = i; 1062 return fsc->add_adapter_routes(fs, &dev->routes); 1063 } 1064 1065 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs) 1066 { 1067 S390FLICState *fs = s390_get_flic(); 1068 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs); 1069 1070 fsc->release_adapter_routes(fs, &dev->routes); 1071 } 1072 1073 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n) 1074 { 1075 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1076 VirtQueue *vq = virtio_get_queue(vdev, n); 1077 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1078 1079 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL, 1080 dev->routes.gsi[n]); 1081 } 1082 1083 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n) 1084 { 1085 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1086 VirtQueue *vq = virtio_get_queue(vdev, n); 1087 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1088 int ret; 1089 1090 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier, 1091 dev->routes.gsi[n]); 1092 assert(ret == 0); 1093 } 1094 1095 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n, 1096 bool assign, bool with_irqfd) 1097 { 1098 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1099 VirtQueue *vq = virtio_get_queue(vdev, n); 1100 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); 1101 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); 1102 1103 if (assign) { 1104 int r = event_notifier_init(notifier, 0); 1105 1106 if (r < 0) { 1107 return r; 1108 } 1109 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd); 1110 if (with_irqfd) { 1111 r = virtio_ccw_add_irqfd(dev, n); 1112 if (r) { 1113 virtio_queue_set_guest_notifier_fd_handler(vq, false, 1114 with_irqfd); 1115 return r; 1116 } 1117 } 1118 /* 1119 * We do not support individual masking for channel devices, so we 1120 * need to manually trigger any guest masking callbacks here. 1121 */ 1122 if (k->guest_notifier_mask) { 1123 k->guest_notifier_mask(vdev, n, false); 1124 } 1125 /* get lost events and re-inject */ 1126 if (k->guest_notifier_pending && 1127 k->guest_notifier_pending(vdev, n)) { 1128 event_notifier_set(notifier); 1129 } 1130 } else { 1131 if (k->guest_notifier_mask) { 1132 k->guest_notifier_mask(vdev, n, true); 1133 } 1134 if (with_irqfd) { 1135 virtio_ccw_remove_irqfd(dev, n); 1136 } 1137 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd); 1138 event_notifier_cleanup(notifier); 1139 } 1140 return 0; 1141 } 1142 1143 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs, 1144 bool assigned) 1145 { 1146 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1147 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1148 CcwDevice *ccw_dev = CCW_DEVICE(d); 1149 bool with_irqfd = ccw_dev->sch->thinint_active && kvm_irqfds_enabled(); 1150 int r, n; 1151 1152 if (with_irqfd && assigned) { 1153 /* irq routes need to be set up before assigning irqfds */ 1154 r = virtio_ccw_setup_irqroutes(dev, nvqs); 1155 if (r < 0) { 1156 goto irqroute_error; 1157 } 1158 } 1159 for (n = 0; n < nvqs; n++) { 1160 if (!virtio_queue_get_num(vdev, n)) { 1161 break; 1162 } 1163 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd); 1164 if (r < 0) { 1165 goto assign_error; 1166 } 1167 } 1168 if (with_irqfd && !assigned) { 1169 /* release irq routes after irqfds have been released */ 1170 virtio_ccw_release_irqroutes(dev, nvqs); 1171 } 1172 return 0; 1173 1174 assign_error: 1175 while (--n >= 0) { 1176 virtio_ccw_set_guest_notifier(dev, n, !assigned, false); 1177 } 1178 irqroute_error: 1179 if (with_irqfd && assigned) { 1180 virtio_ccw_release_irqroutes(dev, nvqs); 1181 } 1182 return r; 1183 } 1184 1185 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f) 1186 { 1187 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1188 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1189 1190 qemu_put_be16(f, virtio_queue_vector(vdev, n)); 1191 } 1192 1193 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f) 1194 { 1195 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1196 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1197 uint16_t vector; 1198 1199 qemu_get_be16s(f, &vector); 1200 virtio_queue_set_vector(vdev, n , vector); 1201 1202 return 0; 1203 } 1204 1205 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) 1206 { 1207 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1208 CcwDevice *ccw_dev = CCW_DEVICE(d); 1209 SubchDev *s = ccw_dev->sch; 1210 VirtIODevice *vdev = virtio_ccw_get_vdev(s); 1211 1212 subch_device_save(s, f); 1213 if (dev->indicators != NULL) { 1214 qemu_put_be32(f, dev->indicators->len); 1215 qemu_put_be64(f, dev->indicators->addr); 1216 } else { 1217 qemu_put_be32(f, 0); 1218 qemu_put_be64(f, 0UL); 1219 } 1220 if (dev->indicators2 != NULL) { 1221 qemu_put_be32(f, dev->indicators2->len); 1222 qemu_put_be64(f, dev->indicators2->addr); 1223 } else { 1224 qemu_put_be32(f, 0); 1225 qemu_put_be64(f, 0UL); 1226 } 1227 if (dev->summary_indicator != NULL) { 1228 qemu_put_be32(f, dev->summary_indicator->len); 1229 qemu_put_be64(f, dev->summary_indicator->addr); 1230 } else { 1231 qemu_put_be32(f, 0); 1232 qemu_put_be64(f, 0UL); 1233 } 1234 qemu_put_be16(f, vdev->config_vector); 1235 qemu_put_be64(f, dev->routes.adapter.ind_offset); 1236 qemu_put_byte(f, dev->thinint_isc); 1237 qemu_put_be32(f, dev->revision); 1238 } 1239 1240 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) 1241 { 1242 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1243 CcwDevice *ccw_dev = CCW_DEVICE(d); 1244 SubchDev *s = ccw_dev->sch; 1245 VirtIODevice *vdev = virtio_ccw_get_vdev(s); 1246 int len; 1247 1248 s->driver_data = dev; 1249 subch_device_load(s, f); 1250 len = qemu_get_be32(f); 1251 if (len != 0) { 1252 dev->indicators = get_indicator(qemu_get_be64(f), len); 1253 } else { 1254 qemu_get_be64(f); 1255 dev->indicators = NULL; 1256 } 1257 len = qemu_get_be32(f); 1258 if (len != 0) { 1259 dev->indicators2 = get_indicator(qemu_get_be64(f), len); 1260 } else { 1261 qemu_get_be64(f); 1262 dev->indicators2 = NULL; 1263 } 1264 len = qemu_get_be32(f); 1265 if (len != 0) { 1266 dev->summary_indicator = get_indicator(qemu_get_be64(f), len); 1267 } else { 1268 qemu_get_be64(f); 1269 dev->summary_indicator = NULL; 1270 } 1271 qemu_get_be16s(f, &vdev->config_vector); 1272 dev->routes.adapter.ind_offset = qemu_get_be64(f); 1273 dev->thinint_isc = qemu_get_byte(f); 1274 dev->revision = qemu_get_be32(f); 1275 if (s->thinint_active) { 1276 return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO, 1277 dev->thinint_isc, true, false, 1278 &dev->routes.adapter.adapter_id); 1279 } 1280 1281 return 0; 1282 } 1283 1284 static void virtio_ccw_pre_plugged(DeviceState *d, Error **errp) 1285 { 1286 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1287 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1288 1289 if (dev->max_rev >= 1) { 1290 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1); 1291 } 1292 } 1293 1294 /* This is called by virtio-bus just after the device is plugged. */ 1295 static void virtio_ccw_device_plugged(DeviceState *d, Error **errp) 1296 { 1297 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1298 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus); 1299 CcwDevice *ccw_dev = CCW_DEVICE(d); 1300 SubchDev *sch = ccw_dev->sch; 1301 int n = virtio_get_num_queues(vdev); 1302 1303 if (!virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) { 1304 dev->max_rev = 0; 1305 } 1306 1307 if (virtio_get_num_queues(vdev) > VIRTIO_CCW_QUEUE_MAX) { 1308 error_setg(errp, "The number of virtqueues %d " 1309 "exceeds ccw limit %d", n, 1310 VIRTIO_CCW_QUEUE_MAX); 1311 return; 1312 } 1313 1314 if (!kvm_eventfds_enabled()) { 1315 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD; 1316 } 1317 1318 sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus); 1319 1320 1321 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1322 d->hotplugged, 1); 1323 } 1324 1325 static void virtio_ccw_device_unplugged(DeviceState *d) 1326 { 1327 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 1328 1329 virtio_ccw_stop_ioeventfd(dev); 1330 } 1331 /**************** Virtio-ccw Bus Device Descriptions *******************/ 1332 1333 static Property virtio_ccw_net_properties[] = { 1334 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, parent_obj.bus_id), 1335 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1336 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1337 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, 1338 VIRTIO_CCW_MAX_REV), 1339 DEFINE_PROP_END_OF_LIST(), 1340 }; 1341 1342 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data) 1343 { 1344 DeviceClass *dc = DEVICE_CLASS(klass); 1345 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1346 1347 k->realize = virtio_ccw_net_realize; 1348 k->exit = virtio_ccw_exit; 1349 dc->reset = virtio_ccw_reset; 1350 dc->props = virtio_ccw_net_properties; 1351 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1352 } 1353 1354 static const TypeInfo virtio_ccw_net = { 1355 .name = TYPE_VIRTIO_NET_CCW, 1356 .parent = TYPE_VIRTIO_CCW_DEVICE, 1357 .instance_size = sizeof(VirtIONetCcw), 1358 .instance_init = virtio_ccw_net_instance_init, 1359 .class_init = virtio_ccw_net_class_init, 1360 }; 1361 1362 static Property virtio_ccw_blk_properties[] = { 1363 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, parent_obj.bus_id), 1364 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1365 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1366 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, 1367 VIRTIO_CCW_MAX_REV), 1368 DEFINE_PROP_END_OF_LIST(), 1369 }; 1370 1371 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data) 1372 { 1373 DeviceClass *dc = DEVICE_CLASS(klass); 1374 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1375 1376 k->realize = virtio_ccw_blk_realize; 1377 k->exit = virtio_ccw_exit; 1378 dc->reset = virtio_ccw_reset; 1379 dc->props = virtio_ccw_blk_properties; 1380 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1381 } 1382 1383 static const TypeInfo virtio_ccw_blk = { 1384 .name = TYPE_VIRTIO_BLK_CCW, 1385 .parent = TYPE_VIRTIO_CCW_DEVICE, 1386 .instance_size = sizeof(VirtIOBlkCcw), 1387 .instance_init = virtio_ccw_blk_instance_init, 1388 .class_init = virtio_ccw_blk_class_init, 1389 }; 1390 1391 static Property virtio_ccw_serial_properties[] = { 1392 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, parent_obj.bus_id), 1393 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1394 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1395 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, 1396 VIRTIO_CCW_MAX_REV), 1397 DEFINE_PROP_END_OF_LIST(), 1398 }; 1399 1400 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data) 1401 { 1402 DeviceClass *dc = DEVICE_CLASS(klass); 1403 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1404 1405 k->realize = virtio_ccw_serial_realize; 1406 k->exit = virtio_ccw_exit; 1407 dc->reset = virtio_ccw_reset; 1408 dc->props = virtio_ccw_serial_properties; 1409 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 1410 } 1411 1412 static const TypeInfo virtio_ccw_serial = { 1413 .name = TYPE_VIRTIO_SERIAL_CCW, 1414 .parent = TYPE_VIRTIO_CCW_DEVICE, 1415 .instance_size = sizeof(VirtioSerialCcw), 1416 .instance_init = virtio_ccw_serial_instance_init, 1417 .class_init = virtio_ccw_serial_class_init, 1418 }; 1419 1420 static Property virtio_ccw_balloon_properties[] = { 1421 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, parent_obj.bus_id), 1422 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1423 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1424 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, 1425 VIRTIO_CCW_MAX_REV), 1426 DEFINE_PROP_END_OF_LIST(), 1427 }; 1428 1429 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data) 1430 { 1431 DeviceClass *dc = DEVICE_CLASS(klass); 1432 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1433 1434 k->realize = virtio_ccw_balloon_realize; 1435 k->exit = virtio_ccw_exit; 1436 dc->reset = virtio_ccw_reset; 1437 dc->props = virtio_ccw_balloon_properties; 1438 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1439 } 1440 1441 static const TypeInfo virtio_ccw_balloon = { 1442 .name = TYPE_VIRTIO_BALLOON_CCW, 1443 .parent = TYPE_VIRTIO_CCW_DEVICE, 1444 .instance_size = sizeof(VirtIOBalloonCcw), 1445 .instance_init = virtio_ccw_balloon_instance_init, 1446 .class_init = virtio_ccw_balloon_class_init, 1447 }; 1448 1449 static Property virtio_ccw_scsi_properties[] = { 1450 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, parent_obj.bus_id), 1451 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1452 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1453 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, 1454 VIRTIO_CCW_MAX_REV), 1455 DEFINE_PROP_END_OF_LIST(), 1456 }; 1457 1458 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data) 1459 { 1460 DeviceClass *dc = DEVICE_CLASS(klass); 1461 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1462 1463 k->realize = virtio_ccw_scsi_realize; 1464 k->exit = virtio_ccw_exit; 1465 dc->reset = virtio_ccw_reset; 1466 dc->props = virtio_ccw_scsi_properties; 1467 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1468 } 1469 1470 static const TypeInfo virtio_ccw_scsi = { 1471 .name = TYPE_VIRTIO_SCSI_CCW, 1472 .parent = TYPE_VIRTIO_CCW_DEVICE, 1473 .instance_size = sizeof(VirtIOSCSICcw), 1474 .instance_init = virtio_ccw_scsi_instance_init, 1475 .class_init = virtio_ccw_scsi_class_init, 1476 }; 1477 1478 #ifdef CONFIG_VHOST_SCSI 1479 static Property vhost_ccw_scsi_properties[] = { 1480 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, parent_obj.bus_id), 1481 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, 1482 VIRTIO_CCW_MAX_REV), 1483 DEFINE_PROP_END_OF_LIST(), 1484 }; 1485 1486 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data) 1487 { 1488 DeviceClass *dc = DEVICE_CLASS(klass); 1489 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1490 1491 k->realize = vhost_ccw_scsi_realize; 1492 k->exit = virtio_ccw_exit; 1493 dc->reset = virtio_ccw_reset; 1494 dc->props = vhost_ccw_scsi_properties; 1495 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1496 } 1497 1498 static const TypeInfo vhost_ccw_scsi = { 1499 .name = TYPE_VHOST_SCSI_CCW, 1500 .parent = TYPE_VIRTIO_CCW_DEVICE, 1501 .instance_size = sizeof(VHostSCSICcw), 1502 .instance_init = vhost_ccw_scsi_instance_init, 1503 .class_init = vhost_ccw_scsi_class_init, 1504 }; 1505 #endif 1506 1507 static void virtio_ccw_rng_instance_init(Object *obj) 1508 { 1509 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj); 1510 1511 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1512 TYPE_VIRTIO_RNG); 1513 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), 1514 "rng", &error_abort); 1515 } 1516 1517 static Property virtio_ccw_rng_properties[] = { 1518 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, parent_obj.bus_id), 1519 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1520 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1521 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, 1522 VIRTIO_CCW_MAX_REV), 1523 DEFINE_PROP_END_OF_LIST(), 1524 }; 1525 1526 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data) 1527 { 1528 DeviceClass *dc = DEVICE_CLASS(klass); 1529 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1530 1531 k->realize = virtio_ccw_rng_realize; 1532 k->exit = virtio_ccw_exit; 1533 dc->reset = virtio_ccw_reset; 1534 dc->props = virtio_ccw_rng_properties; 1535 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1536 } 1537 1538 static const TypeInfo virtio_ccw_rng = { 1539 .name = TYPE_VIRTIO_RNG_CCW, 1540 .parent = TYPE_VIRTIO_CCW_DEVICE, 1541 .instance_size = sizeof(VirtIORNGCcw), 1542 .instance_init = virtio_ccw_rng_instance_init, 1543 .class_init = virtio_ccw_rng_class_init, 1544 }; 1545 1546 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp) 1547 { 1548 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1549 1550 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev); 1551 virtio_ccw_device_realize(_dev, errp); 1552 } 1553 1554 static int virtio_ccw_busdev_exit(DeviceState *dev) 1555 { 1556 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 1557 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 1558 1559 return _info->exit(_dev); 1560 } 1561 1562 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev, 1563 DeviceState *dev, Error **errp) 1564 { 1565 VirtioCcwDevice *_dev = to_virtio_ccw_dev_fast(dev); 1566 1567 virtio_ccw_stop_ioeventfd(_dev); 1568 } 1569 1570 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) 1571 { 1572 DeviceClass *dc = DEVICE_CLASS(klass); 1573 CCWDeviceClass *k = CCW_DEVICE_CLASS(dc); 1574 1575 k->unplug = virtio_ccw_busdev_unplug; 1576 dc->realize = virtio_ccw_busdev_realize; 1577 dc->exit = virtio_ccw_busdev_exit; 1578 dc->bus_type = TYPE_VIRTUAL_CSS_BUS; 1579 } 1580 1581 static const TypeInfo virtio_ccw_device_info = { 1582 .name = TYPE_VIRTIO_CCW_DEVICE, 1583 .parent = TYPE_CCW_DEVICE, 1584 .instance_size = sizeof(VirtioCcwDevice), 1585 .class_init = virtio_ccw_device_class_init, 1586 .class_size = sizeof(VirtIOCCWDeviceClass), 1587 .abstract = true, 1588 }; 1589 1590 /* virtio-ccw-bus */ 1591 1592 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, 1593 VirtioCcwDevice *dev) 1594 { 1595 DeviceState *qdev = DEVICE(dev); 1596 char virtio_bus_name[] = "virtio-bus"; 1597 1598 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS, 1599 qdev, virtio_bus_name); 1600 } 1601 1602 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data) 1603 { 1604 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1605 BusClass *bus_class = BUS_CLASS(klass); 1606 1607 bus_class->max_dev = 1; 1608 k->notify = virtio_ccw_notify; 1609 k->vmstate_change = virtio_ccw_vmstate_change; 1610 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers; 1611 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers; 1612 k->save_queue = virtio_ccw_save_queue; 1613 k->load_queue = virtio_ccw_load_queue; 1614 k->save_config = virtio_ccw_save_config; 1615 k->load_config = virtio_ccw_load_config; 1616 k->pre_plugged = virtio_ccw_pre_plugged; 1617 k->device_plugged = virtio_ccw_device_plugged; 1618 k->device_unplugged = virtio_ccw_device_unplugged; 1619 k->ioeventfd_started = virtio_ccw_ioeventfd_started; 1620 k->ioeventfd_set_started = virtio_ccw_ioeventfd_set_started; 1621 k->ioeventfd_disabled = virtio_ccw_ioeventfd_disabled; 1622 k->ioeventfd_set_disabled = virtio_ccw_ioeventfd_set_disabled; 1623 k->ioeventfd_assign = virtio_ccw_ioeventfd_assign; 1624 } 1625 1626 static const TypeInfo virtio_ccw_bus_info = { 1627 .name = TYPE_VIRTIO_CCW_BUS, 1628 .parent = TYPE_VIRTIO_BUS, 1629 .instance_size = sizeof(VirtioCcwBusState), 1630 .class_init = virtio_ccw_bus_class_init, 1631 }; 1632 1633 #ifdef CONFIG_VIRTFS 1634 static Property virtio_ccw_9p_properties[] = { 1635 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, parent_obj.bus_id), 1636 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags, 1637 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true), 1638 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, 1639 VIRTIO_CCW_MAX_REV), 1640 DEFINE_PROP_END_OF_LIST(), 1641 }; 1642 1643 static void virtio_ccw_9p_realize(VirtioCcwDevice *ccw_dev, Error **errp) 1644 { 1645 V9fsCCWState *dev = VIRTIO_9P_CCW(ccw_dev); 1646 DeviceState *vdev = DEVICE(&dev->vdev); 1647 1648 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 1649 object_property_set_bool(OBJECT(vdev), true, "realized", errp); 1650 } 1651 1652 static void virtio_ccw_9p_class_init(ObjectClass *klass, void *data) 1653 { 1654 DeviceClass *dc = DEVICE_CLASS(klass); 1655 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1656 1657 k->exit = virtio_ccw_exit; 1658 k->realize = virtio_ccw_9p_realize; 1659 dc->reset = virtio_ccw_reset; 1660 dc->props = virtio_ccw_9p_properties; 1661 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1662 } 1663 1664 static void virtio_ccw_9p_instance_init(Object *obj) 1665 { 1666 V9fsCCWState *dev = VIRTIO_9P_CCW(obj); 1667 1668 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1669 TYPE_VIRTIO_9P); 1670 } 1671 1672 static const TypeInfo virtio_ccw_9p_info = { 1673 .name = TYPE_VIRTIO_9P_CCW, 1674 .parent = TYPE_VIRTIO_CCW_DEVICE, 1675 .instance_size = sizeof(V9fsCCWState), 1676 .instance_init = virtio_ccw_9p_instance_init, 1677 .class_init = virtio_ccw_9p_class_init, 1678 }; 1679 #endif 1680 1681 #ifdef CONFIG_VHOST_VSOCK 1682 1683 static Property vhost_vsock_ccw_properties[] = { 1684 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, parent_obj.bus_id), 1685 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev, 1686 VIRTIO_CCW_MAX_REV), 1687 DEFINE_PROP_END_OF_LIST(), 1688 }; 1689 1690 static void vhost_vsock_ccw_realize(VirtioCcwDevice *ccw_dev, Error **errp) 1691 { 1692 VHostVSockCCWState *dev = VHOST_VSOCK_CCW(ccw_dev); 1693 DeviceState *vdev = DEVICE(&dev->vdev); 1694 Error *err = NULL; 1695 1696 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 1697 object_property_set_bool(OBJECT(vdev), true, "realized", &err); 1698 if (err) { 1699 error_propagate(errp, err); 1700 } 1701 } 1702 1703 static void vhost_vsock_ccw_class_init(ObjectClass *klass, void *data) 1704 { 1705 DeviceClass *dc = DEVICE_CLASS(klass); 1706 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 1707 1708 k->realize = vhost_vsock_ccw_realize; 1709 k->exit = virtio_ccw_exit; 1710 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1711 dc->props = vhost_vsock_ccw_properties; 1712 dc->reset = virtio_ccw_reset; 1713 } 1714 1715 static void vhost_vsock_ccw_instance_init(Object *obj) 1716 { 1717 VHostVSockCCWState *dev = VHOST_VSOCK_CCW(obj); 1718 1719 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 1720 TYPE_VHOST_VSOCK); 1721 } 1722 1723 static const TypeInfo vhost_vsock_ccw_info = { 1724 .name = TYPE_VHOST_VSOCK_CCW, 1725 .parent = TYPE_VIRTIO_CCW_DEVICE, 1726 .instance_size = sizeof(VHostVSockCCWState), 1727 .instance_init = vhost_vsock_ccw_instance_init, 1728 .class_init = vhost_vsock_ccw_class_init, 1729 }; 1730 #endif 1731 1732 static void virtio_ccw_register(void) 1733 { 1734 type_register_static(&virtio_ccw_bus_info); 1735 type_register_static(&virtio_ccw_device_info); 1736 type_register_static(&virtio_ccw_serial); 1737 type_register_static(&virtio_ccw_blk); 1738 type_register_static(&virtio_ccw_net); 1739 type_register_static(&virtio_ccw_balloon); 1740 type_register_static(&virtio_ccw_scsi); 1741 #ifdef CONFIG_VHOST_SCSI 1742 type_register_static(&vhost_ccw_scsi); 1743 #endif 1744 type_register_static(&virtio_ccw_rng); 1745 #ifdef CONFIG_VIRTFS 1746 type_register_static(&virtio_ccw_9p_info); 1747 #endif 1748 #ifdef CONFIG_VHOST_VSOCK 1749 type_register_static(&vhost_vsock_ccw_info); 1750 #endif 1751 } 1752 1753 type_init(virtio_ccw_register) 1754