1 /* 2 * virtio ccw target implementation 3 * 4 * Copyright 2012 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 "block/block.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 25 #include "ioinst.h" 26 #include "css.h" 27 #include "virtio-ccw.h" 28 #include "trace.h" 29 30 static int virtual_css_bus_reset(BusState *qbus) 31 { 32 /* This should actually be modelled via the generic css */ 33 css_reset(); 34 35 /* we dont traverse ourself, return 0 */ 36 return 0; 37 } 38 39 40 static void virtual_css_bus_class_init(ObjectClass *klass, void *data) 41 { 42 BusClass *k = BUS_CLASS(klass); 43 44 k->reset = virtual_css_bus_reset; 45 } 46 47 static const TypeInfo virtual_css_bus_info = { 48 .name = TYPE_VIRTUAL_CSS_BUS, 49 .parent = TYPE_BUS, 50 .instance_size = sizeof(VirtualCssBus), 51 .class_init = virtual_css_bus_class_init, 52 }; 53 54 static const VirtIOBindings virtio_ccw_bindings; 55 56 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch) 57 { 58 VirtIODevice *vdev = NULL; 59 60 if (sch->driver_data) { 61 vdev = ((VirtioCcwDevice *)sch->driver_data)->vdev; 62 } 63 return vdev; 64 } 65 66 VirtualCssBus *virtual_css_bus_init(void) 67 { 68 VirtualCssBus *cbus; 69 BusState *bus; 70 DeviceState *dev; 71 72 /* Create bridge device */ 73 dev = qdev_create(NULL, "virtual-css-bridge"); 74 qdev_init_nofail(dev); 75 76 /* Create bus on bridge device */ 77 bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css"); 78 cbus = VIRTUAL_CSS_BUS(bus); 79 80 /* Enable hotplugging */ 81 bus->allow_hotplug = 1; 82 83 return cbus; 84 } 85 86 /* Communication blocks used by several channel commands. */ 87 typedef struct VqInfoBlock { 88 uint64_t queue; 89 uint32_t align; 90 uint16_t index; 91 uint16_t num; 92 } QEMU_PACKED VqInfoBlock; 93 94 typedef struct VqConfigBlock { 95 uint16_t index; 96 uint16_t num_max; 97 } QEMU_PACKED VqConfigBlock; 98 99 typedef struct VirtioFeatDesc { 100 uint32_t features; 101 uint8_t index; 102 } QEMU_PACKED VirtioFeatDesc; 103 104 /* Specify where the virtqueues for the subchannel are in guest memory. */ 105 static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align, 106 uint16_t index, uint16_t num) 107 { 108 VirtioCcwDevice *dev = sch->driver_data; 109 110 if (index > VIRTIO_PCI_QUEUE_MAX) { 111 return -EINVAL; 112 } 113 114 /* Current code in virtio.c relies on 4K alignment. */ 115 if (addr && (align != 4096)) { 116 return -EINVAL; 117 } 118 119 if (!dev) { 120 return -EINVAL; 121 } 122 123 virtio_queue_set_addr(dev->vdev, index, addr); 124 if (!addr) { 125 virtio_queue_set_vector(dev->vdev, index, 0); 126 } else { 127 /* Fail if we don't have a big enough queue. */ 128 /* TODO: Add interface to handle vring.num changing */ 129 if (virtio_queue_get_num(dev->vdev, index) > num) { 130 return -EINVAL; 131 } 132 virtio_queue_set_vector(dev->vdev, index, index); 133 } 134 /* tell notify handler in case of config change */ 135 dev->vdev->config_vector = VIRTIO_PCI_QUEUE_MAX; 136 return 0; 137 } 138 139 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) 140 { 141 int ret; 142 VqInfoBlock info; 143 uint8_t status; 144 VirtioFeatDesc features; 145 void *config; 146 hwaddr indicators; 147 VqConfigBlock vq_config; 148 VirtioCcwDevice *dev = sch->driver_data; 149 bool check_len; 150 int len; 151 hwaddr hw_len; 152 153 if (!dev) { 154 return -EINVAL; 155 } 156 157 trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid, 158 ccw.cmd_code); 159 check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC)); 160 161 /* Look at the command. */ 162 switch (ccw.cmd_code) { 163 case CCW_CMD_SET_VQ: 164 if (check_len) { 165 if (ccw.count != sizeof(info)) { 166 ret = -EINVAL; 167 break; 168 } 169 } else if (ccw.count < sizeof(info)) { 170 /* Can't execute command. */ 171 ret = -EINVAL; 172 break; 173 } 174 if (!ccw.cda) { 175 ret = -EFAULT; 176 } else { 177 info.queue = ldq_phys(ccw.cda); 178 info.align = ldl_phys(ccw.cda + sizeof(info.queue)); 179 info.index = lduw_phys(ccw.cda + sizeof(info.queue) 180 + sizeof(info.align)); 181 info.num = lduw_phys(ccw.cda + sizeof(info.queue) 182 + sizeof(info.align) 183 + sizeof(info.index)); 184 ret = virtio_ccw_set_vqs(sch, info.queue, info.align, info.index, 185 info.num); 186 sch->curr_status.scsw.count = 0; 187 } 188 break; 189 case CCW_CMD_VDEV_RESET: 190 virtio_reset(dev->vdev); 191 ret = 0; 192 break; 193 case CCW_CMD_READ_FEAT: 194 if (check_len) { 195 if (ccw.count != sizeof(features)) { 196 ret = -EINVAL; 197 break; 198 } 199 } else if (ccw.count < sizeof(features)) { 200 /* Can't execute command. */ 201 ret = -EINVAL; 202 break; 203 } 204 if (!ccw.cda) { 205 ret = -EFAULT; 206 } else { 207 features.index = ldub_phys(ccw.cda + sizeof(features.features)); 208 if (features.index < ARRAY_SIZE(dev->host_features)) { 209 features.features = dev->host_features[features.index]; 210 } else { 211 /* Return zeroes if the guest supports more feature bits. */ 212 features.features = 0; 213 } 214 stl_le_phys(ccw.cda, features.features); 215 sch->curr_status.scsw.count = ccw.count - sizeof(features); 216 ret = 0; 217 } 218 break; 219 case CCW_CMD_WRITE_FEAT: 220 if (check_len) { 221 if (ccw.count != sizeof(features)) { 222 ret = -EINVAL; 223 break; 224 } 225 } else if (ccw.count < sizeof(features)) { 226 /* Can't execute command. */ 227 ret = -EINVAL; 228 break; 229 } 230 if (!ccw.cda) { 231 ret = -EFAULT; 232 } else { 233 features.index = ldub_phys(ccw.cda + sizeof(features.features)); 234 features.features = ldl_le_phys(ccw.cda); 235 if (features.index < ARRAY_SIZE(dev->host_features)) { 236 if (dev->vdev->set_features) { 237 dev->vdev->set_features(dev->vdev, features.features); 238 } 239 dev->vdev->guest_features = features.features; 240 } else { 241 /* 242 * If the guest supports more feature bits, assert that it 243 * passes us zeroes for those we don't support. 244 */ 245 if (features.features) { 246 fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n", 247 features.index, features.features); 248 /* XXX: do a unit check here? */ 249 } 250 } 251 sch->curr_status.scsw.count = ccw.count - sizeof(features); 252 ret = 0; 253 } 254 break; 255 case CCW_CMD_READ_CONF: 256 if (check_len) { 257 if (ccw.count > dev->vdev->config_len) { 258 ret = -EINVAL; 259 break; 260 } 261 } 262 len = MIN(ccw.count, dev->vdev->config_len); 263 if (!ccw.cda) { 264 ret = -EFAULT; 265 } else { 266 dev->vdev->get_config(dev->vdev, dev->vdev->config); 267 /* XXX config space endianness */ 268 cpu_physical_memory_write(ccw.cda, dev->vdev->config, len); 269 sch->curr_status.scsw.count = ccw.count - len; 270 ret = 0; 271 } 272 break; 273 case CCW_CMD_WRITE_CONF: 274 if (check_len) { 275 if (ccw.count > dev->vdev->config_len) { 276 ret = -EINVAL; 277 break; 278 } 279 } 280 len = MIN(ccw.count, dev->vdev->config_len); 281 hw_len = len; 282 if (!ccw.cda) { 283 ret = -EFAULT; 284 } else { 285 config = cpu_physical_memory_map(ccw.cda, &hw_len, 0); 286 if (!config) { 287 ret = -EFAULT; 288 } else { 289 len = hw_len; 290 /* XXX config space endianness */ 291 memcpy(dev->vdev->config, config, len); 292 cpu_physical_memory_unmap(config, hw_len, 0, hw_len); 293 if (dev->vdev->set_config) { 294 dev->vdev->set_config(dev->vdev, dev->vdev->config); 295 } 296 sch->curr_status.scsw.count = ccw.count - len; 297 ret = 0; 298 } 299 } 300 break; 301 case CCW_CMD_WRITE_STATUS: 302 if (check_len) { 303 if (ccw.count != sizeof(status)) { 304 ret = -EINVAL; 305 break; 306 } 307 } else if (ccw.count < sizeof(status)) { 308 /* Can't execute command. */ 309 ret = -EINVAL; 310 break; 311 } 312 if (!ccw.cda) { 313 ret = -EFAULT; 314 } else { 315 status = ldub_phys(ccw.cda); 316 virtio_set_status(dev->vdev, status); 317 if (dev->vdev->status == 0) { 318 virtio_reset(dev->vdev); 319 } 320 sch->curr_status.scsw.count = ccw.count - sizeof(status); 321 ret = 0; 322 } 323 break; 324 case CCW_CMD_SET_IND: 325 if (check_len) { 326 if (ccw.count != sizeof(indicators)) { 327 ret = -EINVAL; 328 break; 329 } 330 } else if (ccw.count < sizeof(indicators)) { 331 /* Can't execute command. */ 332 ret = -EINVAL; 333 break; 334 } 335 indicators = ldq_phys(ccw.cda); 336 if (!indicators) { 337 ret = -EFAULT; 338 } else { 339 dev->indicators = indicators; 340 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 341 ret = 0; 342 } 343 break; 344 case CCW_CMD_SET_CONF_IND: 345 if (check_len) { 346 if (ccw.count != sizeof(indicators)) { 347 ret = -EINVAL; 348 break; 349 } 350 } else if (ccw.count < sizeof(indicators)) { 351 /* Can't execute command. */ 352 ret = -EINVAL; 353 break; 354 } 355 indicators = ldq_phys(ccw.cda); 356 if (!indicators) { 357 ret = -EFAULT; 358 } else { 359 dev->indicators2 = indicators; 360 sch->curr_status.scsw.count = ccw.count - sizeof(indicators); 361 ret = 0; 362 } 363 break; 364 case CCW_CMD_READ_VQ_CONF: 365 if (check_len) { 366 if (ccw.count != sizeof(vq_config)) { 367 ret = -EINVAL; 368 break; 369 } 370 } else if (ccw.count < sizeof(vq_config)) { 371 /* Can't execute command. */ 372 ret = -EINVAL; 373 break; 374 } 375 if (!ccw.cda) { 376 ret = -EFAULT; 377 } else { 378 vq_config.index = lduw_phys(ccw.cda); 379 vq_config.num_max = virtio_queue_get_num(dev->vdev, 380 vq_config.index); 381 stw_phys(ccw.cda + sizeof(vq_config.index), vq_config.num_max); 382 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config); 383 ret = 0; 384 } 385 break; 386 default: 387 ret = -ENOSYS; 388 break; 389 } 390 return ret; 391 } 392 393 static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev) 394 { 395 unsigned int cssid = 0; 396 unsigned int ssid = 0; 397 unsigned int schid; 398 unsigned int devno; 399 bool have_devno = false; 400 bool found = false; 401 SubchDev *sch; 402 int ret; 403 int num; 404 DeviceState *parent = DEVICE(dev); 405 406 sch = g_malloc0(sizeof(SubchDev)); 407 408 sch->driver_data = dev; 409 dev->sch = sch; 410 411 dev->vdev = vdev; 412 dev->indicators = 0; 413 414 /* Initialize subchannel structure. */ 415 sch->channel_prog = 0x0; 416 sch->last_cmd_valid = false; 417 sch->orb = NULL; 418 /* 419 * Use a device number if provided. Otherwise, fall back to subchannel 420 * number. 421 */ 422 if (dev->bus_id) { 423 num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno); 424 if (num == 3) { 425 if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) { 426 ret = -EINVAL; 427 error_report("Invalid cssid or ssid: cssid %x, ssid %x", 428 cssid, ssid); 429 goto out_err; 430 } 431 /* Enforce use of virtual cssid. */ 432 if (cssid != VIRTUAL_CSSID) { 433 ret = -EINVAL; 434 error_report("cssid %x not valid for virtio devices", cssid); 435 goto out_err; 436 } 437 if (css_devno_used(cssid, ssid, devno)) { 438 ret = -EEXIST; 439 error_report("Device %x.%x.%04x already exists", cssid, ssid, 440 devno); 441 goto out_err; 442 } 443 sch->cssid = cssid; 444 sch->ssid = ssid; 445 sch->devno = devno; 446 have_devno = true; 447 } else { 448 ret = -EINVAL; 449 error_report("Malformed devno parameter '%s'", dev->bus_id); 450 goto out_err; 451 } 452 } 453 454 /* Find the next free id. */ 455 if (have_devno) { 456 for (schid = 0; schid <= MAX_SCHID; schid++) { 457 if (!css_find_subch(1, cssid, ssid, schid)) { 458 sch->schid = schid; 459 css_subch_assign(cssid, ssid, schid, devno, sch); 460 found = true; 461 break; 462 } 463 } 464 if (!found) { 465 ret = -ENODEV; 466 error_report("No free subchannel found for %x.%x.%04x", cssid, ssid, 467 devno); 468 goto out_err; 469 } 470 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 471 "user-configured"); 472 } else { 473 cssid = VIRTUAL_CSSID; 474 for (ssid = 0; ssid <= MAX_SSID; ssid++) { 475 for (schid = 0; schid <= MAX_SCHID; schid++) { 476 if (!css_find_subch(1, cssid, ssid, schid)) { 477 sch->cssid = cssid; 478 sch->ssid = ssid; 479 sch->schid = schid; 480 devno = schid; 481 /* 482 * If the devno is already taken, look further in this 483 * subchannel set. 484 */ 485 while (css_devno_used(cssid, ssid, devno)) { 486 if (devno == MAX_SCHID) { 487 devno = 0; 488 } else if (devno == schid - 1) { 489 ret = -ENODEV; 490 error_report("No free devno found"); 491 goto out_err; 492 } else { 493 devno++; 494 } 495 } 496 sch->devno = devno; 497 css_subch_assign(cssid, ssid, schid, devno, sch); 498 found = true; 499 break; 500 } 501 } 502 if (found) { 503 break; 504 } 505 } 506 if (!found) { 507 ret = -ENODEV; 508 error_report("Virtual channel subsystem is full!"); 509 goto out_err; 510 } 511 trace_virtio_ccw_new_device(cssid, ssid, schid, devno, 512 "auto-configured"); 513 } 514 515 /* Build initial schib. */ 516 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE); 517 518 sch->ccw_cb = virtio_ccw_cb; 519 520 /* Build senseid data. */ 521 memset(&sch->id, 0, sizeof(SenseId)); 522 sch->id.reserved = 0xff; 523 sch->id.cu_type = VIRTIO_CCW_CU_TYPE; 524 sch->id.cu_model = dev->vdev->device_id; 525 526 virtio_bind_device(vdev, &virtio_ccw_bindings, DEVICE(dev)); 527 /* Only the first 32 feature bits are used. */ 528 dev->host_features[0] = vdev->get_features(vdev, dev->host_features[0]); 529 dev->host_features[0] |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY; 530 dev->host_features[0] |= 0x1 << VIRTIO_F_BAD_FEATURE; 531 532 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 533 parent->hotplugged, 1); 534 return 0; 535 536 out_err: 537 dev->sch = NULL; 538 g_free(sch); 539 return ret; 540 } 541 542 static int virtio_ccw_exit(VirtioCcwDevice *dev) 543 { 544 SubchDev *sch = dev->sch; 545 546 if (sch) { 547 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL); 548 g_free(sch); 549 } 550 dev->indicators = 0; 551 return 0; 552 } 553 554 static int virtio_ccw_net_init(VirtioCcwDevice *dev) 555 { 556 VirtIODevice *vdev; 557 558 vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net, 559 dev->host_features[0]); 560 if (!vdev) { 561 return -1; 562 } 563 564 return virtio_ccw_device_init(dev, vdev); 565 } 566 567 static int virtio_ccw_net_exit(VirtioCcwDevice *dev) 568 { 569 virtio_net_exit(dev->vdev); 570 return virtio_ccw_exit(dev); 571 } 572 573 static int virtio_ccw_blk_init(VirtioCcwDevice *ccw_dev) 574 { 575 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev); 576 DeviceState *vdev = DEVICE(&dev->vdev); 577 virtio_blk_set_conf(vdev, &(dev->blk)); 578 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 579 if (qdev_init(vdev) < 0) { 580 return -1; 581 } 582 583 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 584 } 585 586 static void virtio_ccw_blk_instance_init(Object *obj) 587 { 588 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj); 589 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BLK); 590 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 591 } 592 593 static int virtio_ccw_serial_init(VirtioCcwDevice *ccw_dev) 594 { 595 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev); 596 DeviceState *vdev = DEVICE(&dev->vdev); 597 598 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 599 if (qdev_init(vdev) < 0) { 600 return -1; 601 } 602 603 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 604 } 605 606 607 static void virtio_ccw_serial_instance_init(Object *obj) 608 { 609 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj); 610 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SERIAL); 611 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 612 } 613 614 static int virtio_ccw_balloon_init(VirtioCcwDevice *ccw_dev) 615 { 616 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev); 617 DeviceState *vdev = DEVICE(&dev->vdev); 618 619 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 620 if (qdev_init(vdev) < 0) { 621 return -1; 622 } 623 624 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 625 } 626 627 static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v, 628 void *opaque, const char *name, 629 Error **errp) 630 { 631 VirtIOBalloonCcw *dev = opaque; 632 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp); 633 } 634 635 static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v, 636 void *opaque, const char *name, 637 Error **errp) 638 { 639 VirtIOBalloonCcw *dev = opaque; 640 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 641 errp); 642 } 643 644 static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v, 645 void *opaque, const char *name, 646 Error **errp) 647 { 648 VirtIOBalloonCcw *dev = opaque; 649 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval", 650 errp); 651 } 652 653 static void virtio_ccw_balloon_instance_init(Object *obj) 654 { 655 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj); 656 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BALLOON); 657 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 658 659 object_property_add(obj, "guest-stats", "guest statistics", 660 balloon_ccw_stats_get_all, NULL, NULL, dev, NULL); 661 662 object_property_add(obj, "guest-stats-polling-interval", "int", 663 balloon_ccw_stats_get_poll_interval, 664 balloon_ccw_stats_set_poll_interval, 665 NULL, dev, NULL); 666 } 667 668 static int virtio_ccw_scsi_init(VirtioCcwDevice *ccw_dev) 669 { 670 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev); 671 DeviceState *vdev = DEVICE(&dev->vdev); 672 673 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus)); 674 if (qdev_init(vdev) < 0) { 675 return -1; 676 } 677 678 return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev)); 679 } 680 681 static void virtio_ccw_scsi_instance_init(Object *obj) 682 { 683 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj); 684 object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SCSI); 685 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); 686 } 687 688 static int virtio_ccw_rng_init(VirtioCcwDevice *dev) 689 { 690 VirtIODevice *vdev; 691 692 if (dev->rng.rng == NULL) { 693 dev->rng.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM)); 694 object_property_add_child(OBJECT(dev), "default-backend", 695 OBJECT(dev->rng.default_backend), NULL); 696 object_property_set_link(OBJECT(dev), OBJECT(dev->rng.default_backend), 697 "rng", NULL); 698 } 699 vdev = virtio_rng_init((DeviceState *)dev, &dev->rng); 700 if (!vdev) { 701 return -1; 702 } 703 return virtio_ccw_device_init(dev, vdev); 704 } 705 706 static int virtio_ccw_rng_exit(VirtioCcwDevice *dev) 707 { 708 virtio_rng_exit(dev->vdev); 709 return virtio_ccw_exit(dev); 710 } 711 712 /* DeviceState to VirtioCcwDevice. Note: used on datapath, 713 * be careful and test performance if you change this. 714 */ 715 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d) 716 { 717 return container_of(d, VirtioCcwDevice, parent_obj); 718 } 719 720 static void virtio_ccw_notify(DeviceState *d, uint16_t vector) 721 { 722 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d); 723 SubchDev *sch = dev->sch; 724 uint64_t indicators; 725 726 if (vector >= 128) { 727 return; 728 } 729 730 if (vector < VIRTIO_PCI_QUEUE_MAX) { 731 indicators = ldq_phys(dev->indicators); 732 indicators |= 1ULL << vector; 733 stq_phys(dev->indicators, indicators); 734 } else { 735 vector = 0; 736 indicators = ldq_phys(dev->indicators2); 737 indicators |= 1ULL << vector; 738 stq_phys(dev->indicators2, indicators); 739 } 740 741 css_conditional_io_interrupt(sch); 742 743 } 744 745 static unsigned virtio_ccw_get_features(DeviceState *d) 746 { 747 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 748 749 /* Only the first 32 feature bits are used. */ 750 return dev->host_features[0]; 751 } 752 753 static void virtio_ccw_reset(DeviceState *d) 754 { 755 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); 756 757 virtio_reset(dev->vdev); 758 css_reset_sch(dev->sch); 759 } 760 761 /**************** Virtio-ccw Bus Device Descriptions *******************/ 762 763 static const VirtIOBindings virtio_ccw_bindings = { 764 .notify = virtio_ccw_notify, 765 .get_features = virtio_ccw_get_features, 766 }; 767 768 static Property virtio_ccw_net_properties[] = { 769 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 770 DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]), 771 DEFINE_NIC_PROPERTIES(VirtioCcwDevice, nic), 772 DEFINE_PROP_UINT32("x-txtimer", VirtioCcwDevice, 773 net.txtimer, TX_TIMER_INTERVAL), 774 DEFINE_PROP_INT32("x-txburst", VirtioCcwDevice, 775 net.txburst, TX_BURST), 776 DEFINE_PROP_STRING("tx", VirtioCcwDevice, net.tx), 777 DEFINE_PROP_END_OF_LIST(), 778 }; 779 780 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data) 781 { 782 DeviceClass *dc = DEVICE_CLASS(klass); 783 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 784 785 k->init = virtio_ccw_net_init; 786 k->exit = virtio_ccw_net_exit; 787 dc->reset = virtio_ccw_reset; 788 dc->props = virtio_ccw_net_properties; 789 } 790 791 static const TypeInfo virtio_ccw_net = { 792 .name = "virtio-net-ccw", 793 .parent = TYPE_VIRTIO_CCW_DEVICE, 794 .instance_size = sizeof(VirtioCcwDevice), 795 .class_init = virtio_ccw_net_class_init, 796 }; 797 798 static Property virtio_ccw_blk_properties[] = { 799 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 800 DEFINE_VIRTIO_BLK_FEATURES(VirtioCcwDevice, host_features[0]), 801 DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkCcw, blk), 802 DEFINE_PROP_END_OF_LIST(), 803 }; 804 805 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data) 806 { 807 DeviceClass *dc = DEVICE_CLASS(klass); 808 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 809 810 k->init = virtio_ccw_blk_init; 811 k->exit = virtio_ccw_exit; 812 dc->reset = virtio_ccw_reset; 813 dc->props = virtio_ccw_blk_properties; 814 } 815 816 static const TypeInfo virtio_ccw_blk = { 817 .name = TYPE_VIRTIO_BLK_CCW, 818 .parent = TYPE_VIRTIO_CCW_DEVICE, 819 .instance_size = sizeof(VirtIOBlkCcw), 820 .instance_init = virtio_ccw_blk_instance_init, 821 .class_init = virtio_ccw_blk_class_init, 822 }; 823 824 static Property virtio_ccw_serial_properties[] = { 825 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 826 DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtioSerialCcw, vdev.serial), 827 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]), 828 DEFINE_PROP_END_OF_LIST(), 829 }; 830 831 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data) 832 { 833 DeviceClass *dc = DEVICE_CLASS(klass); 834 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 835 836 k->init = virtio_ccw_serial_init; 837 k->exit = virtio_ccw_exit; 838 dc->reset = virtio_ccw_reset; 839 dc->props = virtio_ccw_serial_properties; 840 } 841 842 static const TypeInfo virtio_ccw_serial = { 843 .name = TYPE_VIRTIO_SERIAL_CCW, 844 .parent = TYPE_VIRTIO_CCW_DEVICE, 845 .instance_size = sizeof(VirtioSerialCcw), 846 .instance_init = virtio_ccw_serial_instance_init, 847 .class_init = virtio_ccw_serial_class_init, 848 }; 849 850 static Property virtio_ccw_balloon_properties[] = { 851 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 852 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]), 853 DEFINE_PROP_END_OF_LIST(), 854 }; 855 856 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data) 857 { 858 DeviceClass *dc = DEVICE_CLASS(klass); 859 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 860 861 k->init = virtio_ccw_balloon_init; 862 k->exit = virtio_ccw_exit; 863 dc->reset = virtio_ccw_reset; 864 dc->props = virtio_ccw_balloon_properties; 865 } 866 867 static const TypeInfo virtio_ccw_balloon = { 868 .name = TYPE_VIRTIO_BALLOON_CCW, 869 .parent = TYPE_VIRTIO_CCW_DEVICE, 870 .instance_size = sizeof(VirtIOBalloonCcw), 871 .instance_init = virtio_ccw_balloon_instance_init, 872 .class_init = virtio_ccw_balloon_class_init, 873 }; 874 875 static Property virtio_ccw_scsi_properties[] = { 876 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 877 DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.conf), 878 DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]), 879 DEFINE_PROP_END_OF_LIST(), 880 }; 881 882 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data) 883 { 884 DeviceClass *dc = DEVICE_CLASS(klass); 885 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 886 887 k->init = virtio_ccw_scsi_init; 888 k->exit = virtio_ccw_exit; 889 dc->reset = virtio_ccw_reset; 890 dc->props = virtio_ccw_scsi_properties; 891 } 892 893 static const TypeInfo virtio_ccw_scsi = { 894 .name = TYPE_VIRTIO_SCSI_CCW, 895 .parent = TYPE_VIRTIO_CCW_DEVICE, 896 .instance_size = sizeof(VirtIOSCSICcw), 897 .instance_init = virtio_ccw_scsi_instance_init, 898 .class_init = virtio_ccw_scsi_class_init, 899 }; 900 901 static void virtio_ccw_rng_initfn(Object *obj) 902 { 903 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(obj); 904 905 object_property_add_link(obj, "rng", TYPE_RNG_BACKEND, 906 (Object **)&dev->rng.rng, NULL); 907 } 908 909 static Property virtio_ccw_rng_properties[] = { 910 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id), 911 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]), 912 DEFINE_PROP_UINT64("max-bytes", VirtioCcwDevice, rng.max_bytes, INT64_MAX), 913 DEFINE_PROP_UINT32("period", VirtioCcwDevice, rng.period_ms, 1 << 16), 914 DEFINE_PROP_END_OF_LIST(), 915 }; 916 917 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data) 918 { 919 DeviceClass *dc = DEVICE_CLASS(klass); 920 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass); 921 922 k->init = virtio_ccw_rng_init; 923 k->exit = virtio_ccw_rng_exit; 924 dc->reset = virtio_ccw_reset; 925 dc->props = virtio_ccw_rng_properties; 926 } 927 928 static const TypeInfo virtio_ccw_rng = { 929 .name = "virtio-rng-ccw", 930 .parent = TYPE_VIRTIO_CCW_DEVICE, 931 .instance_size = sizeof(VirtioCcwDevice), 932 .instance_init = virtio_ccw_rng_initfn, 933 .class_init = virtio_ccw_rng_class_init, 934 }; 935 936 static int virtio_ccw_busdev_init(DeviceState *dev) 937 { 938 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 939 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 940 941 virtio_ccw_bus_new(&_dev->bus, _dev); 942 943 return _info->init(_dev); 944 } 945 946 static int virtio_ccw_busdev_exit(DeviceState *dev) 947 { 948 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 949 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev); 950 951 return _info->exit(_dev); 952 } 953 954 static int virtio_ccw_busdev_unplug(DeviceState *dev) 955 { 956 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev; 957 SubchDev *sch = _dev->sch; 958 959 /* 960 * We should arrive here only for device_del, since we don't support 961 * direct hot(un)plug of channels, but only through virtio. 962 */ 963 assert(sch != NULL); 964 /* Subchannel is now disabled and no longer valid. */ 965 sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA | 966 PMCW_FLAGS_MASK_DNV); 967 968 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0); 969 970 qdev_free(dev); 971 return 0; 972 } 973 974 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data) 975 { 976 DeviceClass *dc = DEVICE_CLASS(klass); 977 978 dc->init = virtio_ccw_busdev_init; 979 dc->exit = virtio_ccw_busdev_exit; 980 dc->unplug = virtio_ccw_busdev_unplug; 981 dc->bus_type = TYPE_VIRTUAL_CSS_BUS; 982 983 } 984 985 static const TypeInfo virtio_ccw_device_info = { 986 .name = TYPE_VIRTIO_CCW_DEVICE, 987 .parent = TYPE_DEVICE, 988 .instance_size = sizeof(VirtioCcwDevice), 989 .class_init = virtio_ccw_device_class_init, 990 .class_size = sizeof(VirtIOCCWDeviceClass), 991 .abstract = true, 992 }; 993 994 /***************** Virtual-css Bus Bridge Device ********************/ 995 /* Only required to have the virtio bus as child in the system bus */ 996 997 static int virtual_css_bridge_init(SysBusDevice *dev) 998 { 999 /* nothing */ 1000 return 0; 1001 } 1002 1003 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data) 1004 { 1005 DeviceClass *dc = DEVICE_CLASS(klass); 1006 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 1007 1008 k->init = virtual_css_bridge_init; 1009 dc->no_user = 1; 1010 } 1011 1012 static const TypeInfo virtual_css_bridge_info = { 1013 .name = "virtual-css-bridge", 1014 .parent = TYPE_SYS_BUS_DEVICE, 1015 .instance_size = sizeof(SysBusDevice), 1016 .class_init = virtual_css_bridge_class_init, 1017 }; 1018 1019 /* virtio-ccw-bus */ 1020 1021 void virtio_ccw_bus_new(VirtioBusState *bus, VirtioCcwDevice *dev) 1022 { 1023 DeviceState *qdev = DEVICE(dev); 1024 BusState *qbus; 1025 1026 qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_CCW_BUS, qdev, NULL); 1027 qbus = BUS(bus); 1028 qbus->allow_hotplug = 1; 1029 } 1030 1031 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data) 1032 { 1033 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); 1034 BusClass *bus_class = BUS_CLASS(klass); 1035 1036 bus_class->max_dev = 1; 1037 k->notify = virtio_ccw_notify; 1038 k->get_features = virtio_ccw_get_features; 1039 } 1040 1041 static const TypeInfo virtio_ccw_bus_info = { 1042 .name = TYPE_VIRTIO_CCW_BUS, 1043 .parent = TYPE_VIRTIO_BUS, 1044 .instance_size = sizeof(VirtioCcwBusState), 1045 .class_init = virtio_ccw_bus_class_init, 1046 }; 1047 1048 static void virtio_ccw_register(void) 1049 { 1050 type_register_static(&virtio_ccw_bus_info); 1051 type_register_static(&virtual_css_bus_info); 1052 type_register_static(&virtio_ccw_device_info); 1053 type_register_static(&virtio_ccw_serial); 1054 type_register_static(&virtio_ccw_blk); 1055 type_register_static(&virtio_ccw_net); 1056 type_register_static(&virtio_ccw_balloon); 1057 type_register_static(&virtio_ccw_scsi); 1058 type_register_static(&virtio_ccw_rng); 1059 type_register_static(&virtual_css_bridge_info); 1060 } 1061 1062 type_init(virtio_ccw_register) 1063