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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 "net/net.h"
20#include "hw/virtio/virtio.h"
21#include "hw/virtio/virtio-serial.h"
22#include "hw/virtio/virtio-net.h"
23#include "hw/sysbus.h"
24#include "qemu/bitops.h"
25#include "qemu/error-report.h"
26#include "hw/virtio/virtio-access.h"
27#include "hw/virtio/virtio-bus.h"
28#include "hw/s390x/adapter.h"
29#include "hw/s390x/s390_flic.h"
30
31#include "cpu.h"
32#include "ioinst.h"
33#include "css.h"
34#include "virtio-ccw.h"
35#include "trace.h"
36
37static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
38 VirtioCcwDevice *dev);
39
40static void virtual_css_bus_reset(BusState *qbus)
41{
42
43 css_reset();
44}
45
46
47static void virtual_css_bus_class_init(ObjectClass *klass, void *data)
48{
49 BusClass *k = BUS_CLASS(klass);
50
51 k->reset = virtual_css_bus_reset;
52}
53
54static const TypeInfo virtual_css_bus_info = {
55 .name = TYPE_VIRTUAL_CSS_BUS,
56 .parent = TYPE_BUS,
57 .instance_size = sizeof(VirtualCssBus),
58 .class_init = virtual_css_bus_class_init,
59};
60
61VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
62{
63 VirtIODevice *vdev = NULL;
64 VirtioCcwDevice *dev = sch->driver_data;
65
66 if (dev) {
67 vdev = virtio_bus_get_device(&dev->bus);
68 }
69 return vdev;
70}
71
72static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
73 bool assign, bool set_handler)
74{
75 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
76 VirtQueue *vq = virtio_get_queue(vdev, n);
77 EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
78 int r = 0;
79 SubchDev *sch = dev->sch;
80 uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
81
82 if (assign) {
83 r = event_notifier_init(notifier, 1);
84 if (r < 0) {
85 error_report("%s: unable to init event notifier: %d", __func__, r);
86 return r;
87 }
88 virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
89 r = s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
90 if (r < 0) {
91 error_report("%s: unable to assign ioeventfd: %d", __func__, r);
92 virtio_queue_set_host_notifier_fd_handler(vq, false, false);
93 event_notifier_cleanup(notifier);
94 return r;
95 }
96 } else {
97 virtio_queue_set_host_notifier_fd_handler(vq, false, false);
98 s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
99 event_notifier_cleanup(notifier);
100 }
101 return r;
102}
103
104static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
105{
106 VirtIODevice *vdev;
107 int n, r;
108
109 if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) ||
110 dev->ioeventfd_disabled ||
111 dev->ioeventfd_started) {
112 return;
113 }
114 vdev = virtio_bus_get_device(&dev->bus);
115 for (n = 0; n < VIRTIO_CCW_QUEUE_MAX; n++) {
116 if (!virtio_queue_get_num(vdev, n)) {
117 continue;
118 }
119 r = virtio_ccw_set_guest2host_notifier(dev, n, true, true);
120 if (r < 0) {
121 goto assign_error;
122 }
123 }
124 dev->ioeventfd_started = true;
125 return;
126
127 assign_error:
128 while (--n >= 0) {
129 if (!virtio_queue_get_num(vdev, n)) {
130 continue;
131 }
132 r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
133 assert(r >= 0);
134 }
135 dev->ioeventfd_started = false;
136
137 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
138 error_report("%s: failed. Fallback to userspace (slower).", __func__);
139}
140
141static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
142{
143 VirtIODevice *vdev;
144 int n, r;
145
146 if (!dev->ioeventfd_started) {
147 return;
148 }
149 vdev = virtio_bus_get_device(&dev->bus);
150 for (n = 0; n < VIRTIO_CCW_QUEUE_MAX; n++) {
151 if (!virtio_queue_get_num(vdev, n)) {
152 continue;
153 }
154 r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
155 assert(r >= 0);
156 }
157 dev->ioeventfd_started = false;
158}
159
160VirtualCssBus *virtual_css_bus_init(void)
161{
162 VirtualCssBus *cbus;
163 BusState *bus;
164 DeviceState *dev;
165
166
167 dev = qdev_create(NULL, "virtual-css-bridge");
168 qdev_init_nofail(dev);
169
170
171 bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
172 cbus = VIRTUAL_CSS_BUS(bus);
173
174
175 qbus_set_hotplug_handler(bus, dev, &error_abort);
176
177 return cbus;
178}
179
180
181typedef struct VqInfoBlockLegacy {
182 uint64_t queue;
183 uint32_t align;
184 uint16_t index;
185 uint16_t num;
186} QEMU_PACKED VqInfoBlockLegacy;
187
188typedef struct VqInfoBlock {
189 uint64_t desc;
190 uint32_t res0;
191 uint16_t index;
192 uint16_t num;
193 uint64_t avail;
194 uint64_t used;
195} QEMU_PACKED VqInfoBlock;
196
197typedef struct VqConfigBlock {
198 uint16_t index;
199 uint16_t num_max;
200} QEMU_PACKED VqConfigBlock;
201
202typedef struct VirtioFeatDesc {
203 uint32_t features;
204 uint8_t index;
205} QEMU_PACKED VirtioFeatDesc;
206
207typedef struct VirtioThinintInfo {
208 hwaddr summary_indicator;
209 hwaddr device_indicator;
210 uint64_t ind_bit;
211 uint8_t isc;
212} QEMU_PACKED VirtioThinintInfo;
213
214typedef struct VirtioRevInfo {
215 uint16_t revision;
216 uint16_t length;
217 uint8_t data[0];
218} QEMU_PACKED VirtioRevInfo;
219
220
221static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info,
222 VqInfoBlockLegacy *linfo)
223{
224 VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
225 uint16_t index = info ? info->index : linfo->index;
226 uint16_t num = info ? info->num : linfo->num;
227 uint64_t desc = info ? info->desc : linfo->queue;
228
229 if (index >= VIRTIO_CCW_QUEUE_MAX) {
230 return -EINVAL;
231 }
232
233
234 if (linfo && desc && (linfo->align != 4096)) {
235 return -EINVAL;
236 }
237
238 if (!vdev) {
239 return -EINVAL;
240 }
241
242 if (info) {
243 virtio_queue_set_rings(vdev, index, desc, info->avail, info->used);
244 } else {
245 virtio_queue_set_addr(vdev, index, desc);
246 }
247 if (!desc) {
248 virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR);
249 } else {
250 if (info) {
251
252 if (virtio_queue_get_num(vdev, index) < num) {
253
254 return -EINVAL;
255 }
256 virtio_queue_set_num(vdev, index, num);
257 } else if (virtio_queue_get_num(vdev, index) > num) {
258
259 return -EINVAL;
260 }
261
262 virtio_queue_set_vector(vdev, index, index);
263 }
264
265 vdev->config_vector = VIRTIO_CCW_QUEUE_MAX;
266 return 0;
267}
268
269static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev)
270{
271 virtio_ccw_stop_ioeventfd(dev);
272 virtio_reset(vdev);
273 if (dev->indicators) {
274 release_indicator(&dev->routes.adapter, dev->indicators);
275 dev->indicators = NULL;
276 }
277 if (dev->indicators2) {
278 release_indicator(&dev->routes.adapter, dev->indicators2);
279 dev->indicators2 = NULL;
280 }
281 if (dev->summary_indicator) {
282 release_indicator(&dev->routes.adapter, dev->summary_indicator);
283 dev->summary_indicator = NULL;
284 }
285 dev->sch->thinint_active = false;
286}
287
288static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len,
289 bool is_legacy)
290{
291 int ret;
292 VqInfoBlock info;
293 VqInfoBlockLegacy linfo;
294 size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info);
295
296 if (check_len) {
297 if (ccw.count != info_len) {
298 return -EINVAL;
299 }
300 } else if (ccw.count < info_len) {
301
302 return -EINVAL;
303 }
304 if (!ccw.cda) {
305 return -EFAULT;
306 }
307 if (is_legacy) {
308 linfo.queue = address_space_ldq_be(&address_space_memory, ccw.cda,
309 MEMTXATTRS_UNSPECIFIED, NULL);
310 linfo.align = address_space_ldl_be(&address_space_memory,
311 ccw.cda + sizeof(linfo.queue),
312 MEMTXATTRS_UNSPECIFIED,
313 NULL);
314 linfo.index = address_space_lduw_be(&address_space_memory,
315 ccw.cda + sizeof(linfo.queue)
316 + sizeof(linfo.align),
317 MEMTXATTRS_UNSPECIFIED,
318 NULL);
319 linfo.num = address_space_lduw_be(&address_space_memory,
320 ccw.cda + sizeof(linfo.queue)
321 + sizeof(linfo.align)
322 + sizeof(linfo.index),
323 MEMTXATTRS_UNSPECIFIED,
324 NULL);
325 ret = virtio_ccw_set_vqs(sch, NULL, &linfo);
326 } else {
327 info.desc = address_space_ldq_be(&address_space_memory, ccw.cda,
328 MEMTXATTRS_UNSPECIFIED, NULL);
329 info.index = address_space_lduw_be(&address_space_memory,
330 ccw.cda + sizeof(info.desc)
331 + sizeof(info.res0),
332 MEMTXATTRS_UNSPECIFIED, NULL);
333 info.num = address_space_lduw_be(&address_space_memory,
334 ccw.cda + sizeof(info.desc)
335 + sizeof(info.res0)
336 + sizeof(info.index),
337 MEMTXATTRS_UNSPECIFIED, NULL);
338 info.avail = address_space_ldq_be(&address_space_memory,
339 ccw.cda + sizeof(info.desc)
340 + sizeof(info.res0)
341 + sizeof(info.index)
342 + sizeof(info.num),
343 MEMTXATTRS_UNSPECIFIED, NULL);
344 info.used = address_space_ldq_be(&address_space_memory,
345 ccw.cda + sizeof(info.desc)
346 + sizeof(info.res0)
347 + sizeof(info.index)
348 + sizeof(info.num)
349 + sizeof(info.avail),
350 MEMTXATTRS_UNSPECIFIED, NULL);
351 ret = virtio_ccw_set_vqs(sch, &info, NULL);
352 }
353 sch->curr_status.scsw.count = 0;
354 return ret;
355}
356
357static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
358{
359 int ret;
360 VirtioRevInfo revinfo;
361 uint8_t status;
362 VirtioFeatDesc features;
363 void *config;
364 hwaddr indicators;
365 VqConfigBlock vq_config;
366 VirtioCcwDevice *dev = sch->driver_data;
367 VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
368 bool check_len;
369 int len;
370 hwaddr hw_len;
371 VirtioThinintInfo *thinint;
372
373 if (!dev) {
374 return -EINVAL;
375 }
376
377 trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
378 ccw.cmd_code);
379 check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
380
381
382 switch (ccw.cmd_code) {
383 case CCW_CMD_SET_VQ:
384 ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1);
385 break;
386 case CCW_CMD_VDEV_RESET:
387 virtio_ccw_reset_virtio(dev, vdev);
388 ret = 0;
389 break;
390 case CCW_CMD_READ_FEAT:
391 if (check_len) {
392 if (ccw.count != sizeof(features)) {
393 ret = -EINVAL;
394 break;
395 }
396 } else if (ccw.count < sizeof(features)) {
397
398 ret = -EINVAL;
399 break;
400 }
401 if (!ccw.cda) {
402 ret = -EFAULT;
403 } else {
404 features.index = address_space_ldub(&address_space_memory,
405 ccw.cda
406 + sizeof(features.features),
407 MEMTXATTRS_UNSPECIFIED,
408 NULL);
409 if (features.index == 0) {
410 if (dev->revision >= 1) {
411
412 features.features = (uint32_t)
413 (vdev->host_features & ~VIRTIO_LEGACY_FEATURES);
414 } else {
415 features.features = (uint32_t)vdev->host_features;
416 }
417 } else if ((features.index == 1) && (dev->revision >= 1)) {
418
419
420
421
422 features.features = (uint32_t)(vdev->host_features >> 32);
423 } else {
424
425 features.features = 0;
426 }
427 address_space_stl_le(&address_space_memory, ccw.cda,
428 features.features, MEMTXATTRS_UNSPECIFIED,
429 NULL);
430 sch->curr_status.scsw.count = ccw.count - sizeof(features);
431 ret = 0;
432 }
433 break;
434 case CCW_CMD_WRITE_FEAT:
435 if (check_len) {
436 if (ccw.count != sizeof(features)) {
437 ret = -EINVAL;
438 break;
439 }
440 } else if (ccw.count < sizeof(features)) {
441
442 ret = -EINVAL;
443 break;
444 }
445 if (!ccw.cda) {
446 ret = -EFAULT;
447 } else {
448 features.index = address_space_ldub(&address_space_memory,
449 ccw.cda
450 + sizeof(features.features),
451 MEMTXATTRS_UNSPECIFIED,
452 NULL);
453 features.features = address_space_ldl_le(&address_space_memory,
454 ccw.cda,
455 MEMTXATTRS_UNSPECIFIED,
456 NULL);
457 if (features.index == 0) {
458 virtio_set_features(vdev,
459 (vdev->guest_features & 0xffffffff00000000ULL) |
460 features.features);
461 } else if ((features.index == 1) && (dev->revision >= 1)) {
462
463
464
465
466
467 virtio_set_features(vdev,
468 (vdev->guest_features & 0x00000000ffffffffULL) |
469 ((uint64_t)features.features << 32));
470 } else {
471
472
473
474
475 if (features.features) {
476 fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n",
477 features.index, features.features);
478
479 }
480 }
481 sch->curr_status.scsw.count = ccw.count - sizeof(features);
482 ret = 0;
483 }
484 break;
485 case CCW_CMD_READ_CONF:
486 if (check_len) {
487 if (ccw.count > vdev->config_len) {
488 ret = -EINVAL;
489 break;
490 }
491 }
492 len = MIN(ccw.count, vdev->config_len);
493 if (!ccw.cda) {
494 ret = -EFAULT;
495 } else {
496 virtio_bus_get_vdev_config(&dev->bus, vdev->config);
497
498 cpu_physical_memory_write(ccw.cda, vdev->config, len);
499 sch->curr_status.scsw.count = ccw.count - len;
500 ret = 0;
501 }
502 break;
503 case CCW_CMD_WRITE_CONF:
504 if (check_len) {
505 if (ccw.count > vdev->config_len) {
506 ret = -EINVAL;
507 break;
508 }
509 }
510 len = MIN(ccw.count, vdev->config_len);
511 hw_len = len;
512 if (!ccw.cda) {
513 ret = -EFAULT;
514 } else {
515 config = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
516 if (!config) {
517 ret = -EFAULT;
518 } else {
519 len = hw_len;
520
521 memcpy(vdev->config, config, len);
522 cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
523 virtio_bus_set_vdev_config(&dev->bus, vdev->config);
524 sch->curr_status.scsw.count = ccw.count - len;
525 ret = 0;
526 }
527 }
528 break;
529 case CCW_CMD_WRITE_STATUS:
530 if (check_len) {
531 if (ccw.count != sizeof(status)) {
532 ret = -EINVAL;
533 break;
534 }
535 } else if (ccw.count < sizeof(status)) {
536
537 ret = -EINVAL;
538 break;
539 }
540 if (!ccw.cda) {
541 ret = -EFAULT;
542 } else {
543 status = address_space_ldub(&address_space_memory, ccw.cda,
544 MEMTXATTRS_UNSPECIFIED, NULL);
545 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
546 virtio_ccw_stop_ioeventfd(dev);
547 }
548 if (virtio_set_status(vdev, status) == 0) {
549 if (vdev->status == 0) {
550 virtio_ccw_reset_virtio(dev, vdev);
551 }
552 if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
553 virtio_ccw_start_ioeventfd(dev);
554 }
555 sch->curr_status.scsw.count = ccw.count - sizeof(status);
556 ret = 0;
557 } else {
558
559 ret = -ENOSYS;
560 }
561 }
562 break;
563 case CCW_CMD_SET_IND:
564 if (check_len) {
565 if (ccw.count != sizeof(indicators)) {
566 ret = -EINVAL;
567 break;
568 }
569 } else if (ccw.count < sizeof(indicators)) {
570
571 ret = -EINVAL;
572 break;
573 }
574 if (sch->thinint_active) {
575
576 ret = -ENOSYS;
577 break;
578 }
579 if (!ccw.cda) {
580 ret = -EFAULT;
581 } else {
582 indicators = address_space_ldq_be(&address_space_memory, ccw.cda,
583 MEMTXATTRS_UNSPECIFIED, NULL);
584 dev->indicators = get_indicator(indicators, sizeof(uint64_t));
585 sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
586 ret = 0;
587 }
588 break;
589 case CCW_CMD_SET_CONF_IND:
590 if (check_len) {
591 if (ccw.count != sizeof(indicators)) {
592 ret = -EINVAL;
593 break;
594 }
595 } else if (ccw.count < sizeof(indicators)) {
596
597 ret = -EINVAL;
598 break;
599 }
600 if (!ccw.cda) {
601 ret = -EFAULT;
602 } else {
603 indicators = address_space_ldq_be(&address_space_memory, ccw.cda,
604 MEMTXATTRS_UNSPECIFIED, NULL);
605 dev->indicators2 = get_indicator(indicators, sizeof(uint64_t));
606 sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
607 ret = 0;
608 }
609 break;
610 case CCW_CMD_READ_VQ_CONF:
611 if (check_len) {
612 if (ccw.count != sizeof(vq_config)) {
613 ret = -EINVAL;
614 break;
615 }
616 } else if (ccw.count < sizeof(vq_config)) {
617
618 ret = -EINVAL;
619 break;
620 }
621 if (!ccw.cda) {
622 ret = -EFAULT;
623 } else {
624 vq_config.index = address_space_lduw_be(&address_space_memory,
625 ccw.cda,
626 MEMTXATTRS_UNSPECIFIED,
627 NULL);
628 if (vq_config.index >= VIRTIO_CCW_QUEUE_MAX) {
629 ret = -EINVAL;
630 break;
631 }
632 vq_config.num_max = virtio_queue_get_num(vdev,
633 vq_config.index);
634 address_space_stw_be(&address_space_memory,
635 ccw.cda + sizeof(vq_config.index),
636 vq_config.num_max,
637 MEMTXATTRS_UNSPECIFIED,
638 NULL);
639 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
640 ret = 0;
641 }
642 break;
643 case CCW_CMD_SET_IND_ADAPTER:
644 if (check_len) {
645 if (ccw.count != sizeof(*thinint)) {
646 ret = -EINVAL;
647 break;
648 }
649 } else if (ccw.count < sizeof(*thinint)) {
650
651 ret = -EINVAL;
652 break;
653 }
654 len = sizeof(*thinint);
655 hw_len = len;
656 if (!ccw.cda) {
657 ret = -EFAULT;
658 } else if (dev->indicators && !sch->thinint_active) {
659
660 ret = -ENOSYS;
661 } else {
662 thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
663 if (!thinint) {
664 ret = -EFAULT;
665 } else {
666 uint64_t ind_bit = ldq_be_p(&thinint->ind_bit);
667
668 len = hw_len;
669 dev->summary_indicator =
670 get_indicator(ldq_be_p(&thinint->summary_indicator),
671 sizeof(uint8_t));
672 dev->indicators =
673 get_indicator(ldq_be_p(&thinint->device_indicator),
674 ind_bit / 8 + 1);
675 dev->thinint_isc = thinint->isc;
676 dev->routes.adapter.ind_offset = ind_bit;
677 dev->routes.adapter.summary_offset = 7;
678 cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len);
679 ret = css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO,
680 dev->thinint_isc, true, false,
681 &dev->routes.adapter.adapter_id);
682 assert(ret == 0);
683 sch->thinint_active = ((dev->indicators != NULL) &&
684 (dev->summary_indicator != NULL));
685 sch->curr_status.scsw.count = ccw.count - len;
686 ret = 0;
687 }
688 }
689 break;
690 case CCW_CMD_SET_VIRTIO_REV:
691 len = sizeof(revinfo);
692 if (ccw.count < len) {
693 ret = -EINVAL;
694 break;
695 }
696 if (!ccw.cda) {
697 ret = -EFAULT;
698 break;
699 }
700 revinfo.revision =
701 address_space_lduw_be(&address_space_memory, ccw.cda,
702 MEMTXATTRS_UNSPECIFIED, NULL);
703 revinfo.length =
704 address_space_lduw_be(&address_space_memory,
705 ccw.cda + sizeof(revinfo.revision),
706 MEMTXATTRS_UNSPECIFIED, NULL);
707 if (ccw.count < len + revinfo.length ||
708 (check_len && ccw.count > len + revinfo.length)) {
709 ret = -EINVAL;
710 break;
711 }
712
713
714
715
716 if (dev->revision >= 0 ||
717 revinfo.revision > virtio_ccw_rev_max(dev)) {
718 ret = -ENOSYS;
719 break;
720 }
721 ret = 0;
722 dev->revision = revinfo.revision;
723 break;
724 default:
725 ret = -ENOSYS;
726 break;
727 }
728 return ret;
729}
730
731static void virtio_sch_disable_cb(SubchDev *sch)
732{
733 VirtioCcwDevice *dev = sch->driver_data;
734
735 dev->revision = -1;
736}
737
738static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
739{
740 unsigned int cssid = 0;
741 unsigned int ssid = 0;
742 unsigned int schid;
743 unsigned int devno;
744 bool have_devno = false;
745 bool found = false;
746 SubchDev *sch;
747 int num;
748 Error *err = NULL;
749 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
750
751 sch = g_malloc0(sizeof(SubchDev));
752
753 sch->driver_data = dev;
754 dev->sch = sch;
755
756 dev->indicators = NULL;
757
758
759 sch->channel_prog = 0x0;
760 sch->last_cmd_valid = false;
761 sch->thinint_active = false;
762
763
764
765
766 if (dev->bus_id) {
767 num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno);
768 if (num == 3) {
769 if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
770 error_setg(errp, "Invalid cssid or ssid: cssid %x, ssid %x",
771 cssid, ssid);
772 goto out_err;
773 }
774
775 if (cssid != VIRTUAL_CSSID) {
776 error_setg(errp, "cssid %x not valid for virtio devices",
777 cssid);
778 goto out_err;
779 }
780 if (css_devno_used(cssid, ssid, devno)) {
781 error_setg(errp, "Device %x.%x.%04x already exists",
782 cssid, ssid, devno);
783 goto out_err;
784 }
785 sch->cssid = cssid;
786 sch->ssid = ssid;
787 sch->devno = devno;
788 have_devno = true;
789 } else {
790 error_setg(errp, "Malformed devno parameter '%s'", dev->bus_id);
791 goto out_err;
792 }
793 }
794
795
796 if (have_devno) {
797 for (schid = 0; schid <= MAX_SCHID; schid++) {
798 if (!css_find_subch(1, cssid, ssid, schid)) {
799 sch->schid = schid;
800 css_subch_assign(cssid, ssid, schid, devno, sch);
801 found = true;
802 break;
803 }
804 }
805 if (!found) {
806 error_setg(errp, "No free subchannel found for %x.%x.%04x",
807 cssid, ssid, devno);
808 goto out_err;
809 }
810 trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
811 "user-configured");
812 } else {
813 cssid = VIRTUAL_CSSID;
814 for (ssid = 0; ssid <= MAX_SSID; ssid++) {
815 for (schid = 0; schid <= MAX_SCHID; schid++) {
816 if (!css_find_subch(1, cssid, ssid, schid)) {
817 sch->cssid = cssid;
818 sch->ssid = ssid;
819 sch->schid = schid;
820 devno = schid;
821
822
823
824
825 while (css_devno_used(cssid, ssid, devno)) {
826 if (devno == MAX_SCHID) {
827 devno = 0;
828 } else if (devno == schid - 1) {
829 error_setg(errp, "No free devno found");
830 goto out_err;
831 } else {
832 devno++;
833 }
834 }
835 sch->devno = devno;
836 css_subch_assign(cssid, ssid, schid, devno, sch);
837 found = true;
838 break;
839 }
840 }
841 if (found) {
842 break;
843 }
844 }
845 if (!found) {
846 error_setg(errp, "Virtual channel subsystem is full!");
847 goto out_err;
848 }
849 trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
850 "auto-configured");
851 }
852
853
854 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
855
856 sch->ccw_cb = virtio_ccw_cb;
857 sch->disable_cb = virtio_sch_disable_cb;
858
859
860 memset(&sch->id, 0, sizeof(SenseId));
861 sch->id.reserved = 0xff;
862 sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
863
864 dev->revision = -1;
865
866 if (k->realize) {
867 k->realize(dev, &err);
868 }
869 if (err) {
870 error_propagate(errp, err);
871 css_subch_assign(cssid, ssid, schid, devno, NULL);
872 goto out_err;
873 }
874
875 return;
876
877out_err:
878 dev->sch = NULL;
879 g_free(sch);
880}
881
882static int virtio_ccw_exit(VirtioCcwDevice *dev)
883{
884 SubchDev *sch = dev->sch;
885
886 if (sch) {
887 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
888 g_free(sch);
889 }
890 if (dev->indicators) {
891 release_indicator(&dev->routes.adapter, dev->indicators);
892 dev->indicators = NULL;
893 }
894 return 0;
895}
896
897static void virtio_ccw_net_realize(VirtioCcwDevice *ccw_dev, Error **errp)
898{
899 DeviceState *qdev = DEVICE(ccw_dev);
900 VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev);
901 DeviceState *vdev = DEVICE(&dev->vdev);
902 Error *err = NULL;
903
904 virtio_net_set_netclient_name(&dev->vdev, qdev->id,
905 object_get_typename(OBJECT(qdev)));
906 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
907 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
908 if (err) {
909 error_propagate(errp, err);
910 }
911}
912
913static void virtio_ccw_net_instance_init(Object *obj)
914{
915 VirtIONetCcw *dev = VIRTIO_NET_CCW(obj);
916
917 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
918 TYPE_VIRTIO_NET);
919 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
920 "bootindex", &error_abort);
921}
922
923static void virtio_ccw_blk_realize(VirtioCcwDevice *ccw_dev, Error **errp)
924{
925 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev);
926 DeviceState *vdev = DEVICE(&dev->vdev);
927 Error *err = NULL;
928
929 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
930 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
931 if (err) {
932 error_propagate(errp, err);
933 }
934}
935
936static void virtio_ccw_blk_instance_init(Object *obj)
937{
938 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj);
939
940 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
941 TYPE_VIRTIO_BLK);
942 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
943 &error_abort);
944 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
945 "bootindex", &error_abort);
946}
947
948static void virtio_ccw_serial_realize(VirtioCcwDevice *ccw_dev, Error **errp)
949{
950 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev);
951 DeviceState *vdev = DEVICE(&dev->vdev);
952 DeviceState *proxy = DEVICE(ccw_dev);
953 Error *err = NULL;
954 char *bus_name;
955
956
957
958
959
960 if (proxy->id) {
961 bus_name = g_strdup_printf("%s.0", proxy->id);
962 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
963 g_free(bus_name);
964 }
965
966 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
967 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
968 if (err) {
969 error_propagate(errp, err);
970 }
971}
972
973
974static void virtio_ccw_serial_instance_init(Object *obj)
975{
976 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj);
977
978 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
979 TYPE_VIRTIO_SERIAL);
980}
981
982static void virtio_ccw_balloon_realize(VirtioCcwDevice *ccw_dev, Error **errp)
983{
984 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev);
985 DeviceState *vdev = DEVICE(&dev->vdev);
986 Error *err = NULL;
987
988 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
989 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
990 if (err) {
991 error_propagate(errp, err);
992 }
993}
994
995static void virtio_ccw_balloon_instance_init(Object *obj)
996{
997 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj);
998
999 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1000 TYPE_VIRTIO_BALLOON);
1001 object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev),
1002 "guest-stats", &error_abort);
1003 object_property_add_alias(obj, "guest-stats-polling-interval",
1004 OBJECT(&dev->vdev),
1005 "guest-stats-polling-interval", &error_abort);
1006}
1007
1008static void virtio_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1009{
1010 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev);
1011 DeviceState *vdev = DEVICE(&dev->vdev);
1012 DeviceState *qdev = DEVICE(ccw_dev);
1013 Error *err = NULL;
1014 char *bus_name;
1015
1016
1017
1018
1019
1020 if (qdev->id) {
1021 bus_name = g_strdup_printf("%s.0", qdev->id);
1022 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1023 g_free(bus_name);
1024 }
1025
1026 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1027 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1028 if (err) {
1029 error_propagate(errp, err);
1030 }
1031}
1032
1033static void virtio_ccw_scsi_instance_init(Object *obj)
1034{
1035 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj);
1036
1037 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1038 TYPE_VIRTIO_SCSI);
1039 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread",
1040 &error_abort);
1041}
1042
1043#ifdef CONFIG_VHOST_SCSI
1044static void vhost_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1045{
1046 VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
1047 DeviceState *vdev = DEVICE(&dev->vdev);
1048 Error *err = NULL;
1049
1050 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1051 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1052 if (err) {
1053 error_propagate(errp, err);
1054 }
1055}
1056
1057static void vhost_ccw_scsi_instance_init(Object *obj)
1058{
1059 VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
1060
1061 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1062 TYPE_VHOST_SCSI);
1063}
1064#endif
1065
1066static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1067{
1068 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
1069 DeviceState *vdev = DEVICE(&dev->vdev);
1070 Error *err = NULL;
1071
1072 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1073 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1074 if (err) {
1075 error_propagate(errp, err);
1076 return;
1077 }
1078
1079 object_property_set_link(OBJECT(dev),
1080 OBJECT(dev->vdev.conf.rng), "rng",
1081 NULL);
1082}
1083
1084
1085
1086
1087static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
1088{
1089 return container_of(d, VirtioCcwDevice, parent_obj);
1090}
1091
1092static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc,
1093 uint8_t to_be_set)
1094{
1095 uint8_t ind_old, ind_new;
1096 hwaddr len = 1;
1097 uint8_t *ind_addr;
1098
1099 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
1100 if (!ind_addr) {
1101 error_report("%s(%x.%x.%04x): unable to access indicator",
1102 __func__, sch->cssid, sch->ssid, sch->schid);
1103 return -1;
1104 }
1105 do {
1106 ind_old = *ind_addr;
1107 ind_new = ind_old | to_be_set;
1108 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
1109 cpu_physical_memory_unmap(ind_addr, len, 1, len);
1110
1111 return ind_old;
1112}
1113
1114static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
1115{
1116 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
1117 SubchDev *sch = dev->sch;
1118 uint64_t indicators;
1119
1120
1121 if (vector >= VIRTIO_CCW_QUEUE_MAX + 64) {
1122 return;
1123 }
1124
1125 if (vector < VIRTIO_CCW_QUEUE_MAX) {
1126 if (!dev->indicators) {
1127 return;
1128 }
1129 if (sch->thinint_active) {
1130
1131
1132
1133
1134
1135
1136 uint64_t ind_bit = dev->routes.adapter.ind_offset;
1137
1138 virtio_set_ind_atomic(sch, dev->indicators->addr +
1139 (ind_bit + vector) / 8,
1140 0x80 >> ((ind_bit + vector) % 8));
1141 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr,
1142 0x01)) {
1143 css_adapter_interrupt(dev->thinint_isc);
1144 }
1145 } else {
1146 indicators = address_space_ldq(&address_space_memory,
1147 dev->indicators->addr,
1148 MEMTXATTRS_UNSPECIFIED,
1149 NULL);
1150 indicators |= 1ULL << vector;
1151 address_space_stq(&address_space_memory, dev->indicators->addr,
1152 indicators, MEMTXATTRS_UNSPECIFIED, NULL);
1153 css_conditional_io_interrupt(sch);
1154 }
1155 } else {
1156 if (!dev->indicators2) {
1157 return;
1158 }
1159 vector = 0;
1160 indicators = address_space_ldq(&address_space_memory,
1161 dev->indicators2->addr,
1162 MEMTXATTRS_UNSPECIFIED,
1163 NULL);
1164 indicators |= 1ULL << vector;
1165 address_space_stq(&address_space_memory, dev->indicators2->addr,
1166 indicators, MEMTXATTRS_UNSPECIFIED, NULL);
1167 css_conditional_io_interrupt(sch);
1168 }
1169}
1170
1171static void virtio_ccw_reset(DeviceState *d)
1172{
1173 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1174 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1175
1176 virtio_ccw_reset_virtio(dev, vdev);
1177 css_reset_sch(dev->sch);
1178}
1179
1180static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
1181{
1182 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1183
1184 if (running) {
1185 virtio_ccw_start_ioeventfd(dev);
1186 } else {
1187 virtio_ccw_stop_ioeventfd(dev);
1188 }
1189}
1190
1191static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
1192{
1193 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1194
1195 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
1196}
1197
1198static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
1199{
1200 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1201
1202
1203
1204 dev->ioeventfd_disabled = assign;
1205 if (assign) {
1206 virtio_ccw_stop_ioeventfd(dev);
1207 }
1208 return virtio_ccw_set_guest2host_notifier(dev, n, assign, false);
1209}
1210
1211static int virtio_ccw_get_mappings(VirtioCcwDevice *dev)
1212{
1213 int r;
1214
1215 if (!dev->sch->thinint_active) {
1216 return -EINVAL;
1217 }
1218
1219 r = map_indicator(&dev->routes.adapter, dev->summary_indicator);
1220 if (r) {
1221 return r;
1222 }
1223 r = map_indicator(&dev->routes.adapter, dev->indicators);
1224 if (r) {
1225 return r;
1226 }
1227 dev->routes.adapter.summary_addr = dev->summary_indicator->map;
1228 dev->routes.adapter.ind_addr = dev->indicators->map;
1229
1230 return 0;
1231}
1232
1233static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs)
1234{
1235 int i;
1236 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1237 int ret;
1238 S390FLICState *fs = s390_get_flic();
1239 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
1240
1241 ret = virtio_ccw_get_mappings(dev);
1242 if (ret) {
1243 return ret;
1244 }
1245 for (i = 0; i < nvqs; i++) {
1246 if (!virtio_queue_get_num(vdev, i)) {
1247 break;
1248 }
1249 }
1250 dev->routes.num_routes = i;
1251 return fsc->add_adapter_routes(fs, &dev->routes);
1252}
1253
1254static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs)
1255{
1256 S390FLICState *fs = s390_get_flic();
1257 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
1258
1259 fsc->release_adapter_routes(fs, &dev->routes);
1260}
1261
1262static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n)
1263{
1264 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1265 VirtQueue *vq = virtio_get_queue(vdev, n);
1266 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1267
1268 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL,
1269 dev->routes.gsi[n]);
1270}
1271
1272static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n)
1273{
1274 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1275 VirtQueue *vq = virtio_get_queue(vdev, n);
1276 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1277 int ret;
1278
1279 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier,
1280 dev->routes.gsi[n]);
1281 assert(ret == 0);
1282}
1283
1284static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
1285 bool assign, bool with_irqfd)
1286{
1287 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1288 VirtQueue *vq = virtio_get_queue(vdev, n);
1289 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1290 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
1291
1292 if (assign) {
1293 int r = event_notifier_init(notifier, 0);
1294
1295 if (r < 0) {
1296 return r;
1297 }
1298 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
1299 if (with_irqfd) {
1300 r = virtio_ccw_add_irqfd(dev, n);
1301 if (r) {
1302 virtio_queue_set_guest_notifier_fd_handler(vq, false,
1303 with_irqfd);
1304 return r;
1305 }
1306 }
1307
1308
1309
1310
1311 if (k->guest_notifier_mask) {
1312 k->guest_notifier_mask(vdev, n, false);
1313 }
1314
1315 if (k->guest_notifier_pending &&
1316 k->guest_notifier_pending(vdev, n)) {
1317 event_notifier_set(notifier);
1318 }
1319 } else {
1320 if (k->guest_notifier_mask) {
1321 k->guest_notifier_mask(vdev, n, true);
1322 }
1323 if (with_irqfd) {
1324 virtio_ccw_remove_irqfd(dev, n);
1325 }
1326 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
1327 event_notifier_cleanup(notifier);
1328 }
1329 return 0;
1330}
1331
1332static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
1333 bool assigned)
1334{
1335 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1336 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1337 bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled();
1338 int r, n;
1339
1340 if (with_irqfd && assigned) {
1341
1342 r = virtio_ccw_setup_irqroutes(dev, nvqs);
1343 if (r < 0) {
1344 goto irqroute_error;
1345 }
1346 }
1347 for (n = 0; n < nvqs; n++) {
1348 if (!virtio_queue_get_num(vdev, n)) {
1349 break;
1350 }
1351 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd);
1352 if (r < 0) {
1353 goto assign_error;
1354 }
1355 }
1356 if (with_irqfd && !assigned) {
1357
1358 virtio_ccw_release_irqroutes(dev, nvqs);
1359 }
1360 return 0;
1361
1362assign_error:
1363 while (--n >= 0) {
1364 virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
1365 }
1366irqroute_error:
1367 if (with_irqfd && assigned) {
1368 virtio_ccw_release_irqroutes(dev, nvqs);
1369 }
1370 return r;
1371}
1372
1373static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f)
1374{
1375 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1376 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1377
1378 qemu_put_be16(f, virtio_queue_vector(vdev, n));
1379}
1380
1381static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f)
1382{
1383 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1384 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1385 uint16_t vector;
1386
1387 qemu_get_be16s(f, &vector);
1388 virtio_queue_set_vector(vdev, n , vector);
1389
1390 return 0;
1391}
1392
1393static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
1394{
1395 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1396 SubchDev *s = dev->sch;
1397 VirtIODevice *vdev = virtio_ccw_get_vdev(s);
1398
1399 subch_device_save(s, f);
1400 if (dev->indicators != NULL) {
1401 qemu_put_be32(f, dev->indicators->len);
1402 qemu_put_be64(f, dev->indicators->addr);
1403 } else {
1404 qemu_put_be32(f, 0);
1405 qemu_put_be64(f, 0UL);
1406 }
1407 if (dev->indicators2 != NULL) {
1408 qemu_put_be32(f, dev->indicators2->len);
1409 qemu_put_be64(f, dev->indicators2->addr);
1410 } else {
1411 qemu_put_be32(f, 0);
1412 qemu_put_be64(f, 0UL);
1413 }
1414 if (dev->summary_indicator != NULL) {
1415 qemu_put_be32(f, dev->summary_indicator->len);
1416 qemu_put_be64(f, dev->summary_indicator->addr);
1417 } else {
1418 qemu_put_be32(f, 0);
1419 qemu_put_be64(f, 0UL);
1420 }
1421 qemu_put_be16(f, vdev->config_vector);
1422 qemu_put_be64(f, dev->routes.adapter.ind_offset);
1423 qemu_put_byte(f, dev->thinint_isc);
1424 qemu_put_be32(f, dev->revision);
1425}
1426
1427static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
1428{
1429 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1430 SubchDev *s = dev->sch;
1431 VirtIODevice *vdev = virtio_ccw_get_vdev(s);
1432 int len;
1433
1434 s->driver_data = dev;
1435 subch_device_load(s, f);
1436 len = qemu_get_be32(f);
1437 if (len != 0) {
1438 dev->indicators = get_indicator(qemu_get_be64(f), len);
1439 } else {
1440 qemu_get_be64(f);
1441 dev->indicators = NULL;
1442 }
1443 len = qemu_get_be32(f);
1444 if (len != 0) {
1445 dev->indicators2 = get_indicator(qemu_get_be64(f), len);
1446 } else {
1447 qemu_get_be64(f);
1448 dev->indicators2 = NULL;
1449 }
1450 len = qemu_get_be32(f);
1451 if (len != 0) {
1452 dev->summary_indicator = get_indicator(qemu_get_be64(f), len);
1453 } else {
1454 qemu_get_be64(f);
1455 dev->summary_indicator = NULL;
1456 }
1457 qemu_get_be16s(f, &vdev->config_vector);
1458 dev->routes.adapter.ind_offset = qemu_get_be64(f);
1459 dev->thinint_isc = qemu_get_byte(f);
1460 dev->revision = qemu_get_be32(f);
1461 if (s->thinint_active) {
1462 return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO,
1463 dev->thinint_isc, true, false,
1464 &dev->routes.adapter.adapter_id);
1465 }
1466
1467 return 0;
1468}
1469
1470
1471static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
1472{
1473 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1474 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1475 SubchDev *sch = dev->sch;
1476 int n = virtio_get_num_queues(vdev);
1477
1478 if (virtio_get_num_queues(vdev) > VIRTIO_CCW_QUEUE_MAX) {
1479 error_setg(errp, "The nubmer of virtqueues %d "
1480 "exceeds ccw limit %d", n,
1481 VIRTIO_CCW_QUEUE_MAX);
1482 return;
1483 }
1484
1485 if (!kvm_eventfds_enabled()) {
1486 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
1487 }
1488
1489 sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);
1490
1491 if (dev->max_rev >= 1) {
1492 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1493 }
1494
1495 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
1496 d->hotplugged, 1);
1497}
1498
1499static void virtio_ccw_post_plugged(DeviceState *d, Error **errp)
1500{
1501 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1502 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1503
1504 if (!virtio_host_has_feature(vdev, VIRTIO_F_VERSION_1)) {
1505
1506 dev->max_rev = 0;
1507 }
1508}
1509
1510static void virtio_ccw_device_unplugged(DeviceState *d)
1511{
1512 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1513
1514 virtio_ccw_stop_ioeventfd(dev);
1515}
1516
1517
1518static Property virtio_ccw_net_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_UINT32("max_revision", VirtioCcwDevice, max_rev,
1523 VIRTIO_CCW_MAX_REV),
1524 DEFINE_PROP_END_OF_LIST(),
1525};
1526
1527static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
1528{
1529 DeviceClass *dc = DEVICE_CLASS(klass);
1530 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1531
1532 k->realize = virtio_ccw_net_realize;
1533 k->exit = virtio_ccw_exit;
1534 dc->reset = virtio_ccw_reset;
1535 dc->props = virtio_ccw_net_properties;
1536 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1537}
1538
1539static const TypeInfo virtio_ccw_net = {
1540 .name = TYPE_VIRTIO_NET_CCW,
1541 .parent = TYPE_VIRTIO_CCW_DEVICE,
1542 .instance_size = sizeof(VirtIONetCcw),
1543 .instance_init = virtio_ccw_net_instance_init,
1544 .class_init = virtio_ccw_net_class_init,
1545};
1546
1547static Property virtio_ccw_blk_properties[] = {
1548 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1549 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1550 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1551 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1552 VIRTIO_CCW_MAX_REV),
1553 DEFINE_PROP_END_OF_LIST(),
1554};
1555
1556static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
1557{
1558 DeviceClass *dc = DEVICE_CLASS(klass);
1559 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1560
1561 k->realize = virtio_ccw_blk_realize;
1562 k->exit = virtio_ccw_exit;
1563 dc->reset = virtio_ccw_reset;
1564 dc->props = virtio_ccw_blk_properties;
1565 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1566}
1567
1568static const TypeInfo virtio_ccw_blk = {
1569 .name = TYPE_VIRTIO_BLK_CCW,
1570 .parent = TYPE_VIRTIO_CCW_DEVICE,
1571 .instance_size = sizeof(VirtIOBlkCcw),
1572 .instance_init = virtio_ccw_blk_instance_init,
1573 .class_init = virtio_ccw_blk_class_init,
1574};
1575
1576static Property virtio_ccw_serial_properties[] = {
1577 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1578 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1579 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1580 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1581 VIRTIO_CCW_MAX_REV),
1582 DEFINE_PROP_END_OF_LIST(),
1583};
1584
1585static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
1586{
1587 DeviceClass *dc = DEVICE_CLASS(klass);
1588 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1589
1590 k->realize = virtio_ccw_serial_realize;
1591 k->exit = virtio_ccw_exit;
1592 dc->reset = virtio_ccw_reset;
1593 dc->props = virtio_ccw_serial_properties;
1594 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
1595}
1596
1597static const TypeInfo virtio_ccw_serial = {
1598 .name = TYPE_VIRTIO_SERIAL_CCW,
1599 .parent = TYPE_VIRTIO_CCW_DEVICE,
1600 .instance_size = sizeof(VirtioSerialCcw),
1601 .instance_init = virtio_ccw_serial_instance_init,
1602 .class_init = virtio_ccw_serial_class_init,
1603};
1604
1605static Property virtio_ccw_balloon_properties[] = {
1606 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1607 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1608 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1609 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1610 VIRTIO_CCW_MAX_REV),
1611 DEFINE_PROP_END_OF_LIST(),
1612};
1613
1614static void virtio_ccw_balloon_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_balloon_realize;
1620 k->exit = virtio_ccw_exit;
1621 dc->reset = virtio_ccw_reset;
1622 dc->props = virtio_ccw_balloon_properties;
1623 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1624}
1625
1626static const TypeInfo virtio_ccw_balloon = {
1627 .name = TYPE_VIRTIO_BALLOON_CCW,
1628 .parent = TYPE_VIRTIO_CCW_DEVICE,
1629 .instance_size = sizeof(VirtIOBalloonCcw),
1630 .instance_init = virtio_ccw_balloon_instance_init,
1631 .class_init = virtio_ccw_balloon_class_init,
1632};
1633
1634static Property virtio_ccw_scsi_properties[] = {
1635 DEFINE_PROP_STRING("devno", VirtioCcwDevice, 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
1643static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
1644{
1645 DeviceClass *dc = DEVICE_CLASS(klass);
1646 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1647
1648 k->realize = virtio_ccw_scsi_realize;
1649 k->exit = virtio_ccw_exit;
1650 dc->reset = virtio_ccw_reset;
1651 dc->props = virtio_ccw_scsi_properties;
1652 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1653}
1654
1655static const TypeInfo virtio_ccw_scsi = {
1656 .name = TYPE_VIRTIO_SCSI_CCW,
1657 .parent = TYPE_VIRTIO_CCW_DEVICE,
1658 .instance_size = sizeof(VirtIOSCSICcw),
1659 .instance_init = virtio_ccw_scsi_instance_init,
1660 .class_init = virtio_ccw_scsi_class_init,
1661};
1662
1663#ifdef CONFIG_VHOST_SCSI
1664static Property vhost_ccw_scsi_properties[] = {
1665 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1666 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1667 VIRTIO_CCW_MAX_REV),
1668 DEFINE_PROP_END_OF_LIST(),
1669};
1670
1671static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
1672{
1673 DeviceClass *dc = DEVICE_CLASS(klass);
1674 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1675
1676 k->realize = vhost_ccw_scsi_realize;
1677 k->exit = virtio_ccw_exit;
1678 dc->reset = virtio_ccw_reset;
1679 dc->props = vhost_ccw_scsi_properties;
1680 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1681}
1682
1683static const TypeInfo vhost_ccw_scsi = {
1684 .name = TYPE_VHOST_SCSI_CCW,
1685 .parent = TYPE_VIRTIO_CCW_DEVICE,
1686 .instance_size = sizeof(VHostSCSICcw),
1687 .instance_init = vhost_ccw_scsi_instance_init,
1688 .class_init = vhost_ccw_scsi_class_init,
1689};
1690#endif
1691
1692static void virtio_ccw_rng_instance_init(Object *obj)
1693{
1694 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
1695
1696 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1697 TYPE_VIRTIO_RNG);
1698 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev),
1699 "rng", &error_abort);
1700}
1701
1702static Property virtio_ccw_rng_properties[] = {
1703 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1704 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1705 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1706 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1707 VIRTIO_CCW_MAX_REV),
1708 DEFINE_PROP_END_OF_LIST(),
1709};
1710
1711static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
1712{
1713 DeviceClass *dc = DEVICE_CLASS(klass);
1714 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1715
1716 k->realize = virtio_ccw_rng_realize;
1717 k->exit = virtio_ccw_exit;
1718 dc->reset = virtio_ccw_reset;
1719 dc->props = virtio_ccw_rng_properties;
1720 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1721}
1722
1723static const TypeInfo virtio_ccw_rng = {
1724 .name = TYPE_VIRTIO_RNG_CCW,
1725 .parent = TYPE_VIRTIO_CCW_DEVICE,
1726 .instance_size = sizeof(VirtIORNGCcw),
1727 .instance_init = virtio_ccw_rng_instance_init,
1728 .class_init = virtio_ccw_rng_class_init,
1729};
1730
1731static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp)
1732{
1733 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1734
1735 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1736 virtio_ccw_device_realize(_dev, errp);
1737}
1738
1739static int virtio_ccw_busdev_exit(DeviceState *dev)
1740{
1741 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1742 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1743
1744 return _info->exit(_dev);
1745}
1746
1747static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev,
1748 DeviceState *dev, Error **errp)
1749{
1750 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1751 SubchDev *sch = _dev->sch;
1752
1753 virtio_ccw_stop_ioeventfd(_dev);
1754
1755
1756
1757
1758
1759 assert(sch != NULL);
1760
1761 sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
1762 PMCW_FLAGS_MASK_DNV);
1763
1764 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
1765
1766 object_unparent(OBJECT(dev));
1767}
1768
1769static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1770{
1771 DeviceClass *dc = DEVICE_CLASS(klass);
1772
1773 dc->realize = virtio_ccw_busdev_realize;
1774 dc->exit = virtio_ccw_busdev_exit;
1775 dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1776}
1777
1778static const TypeInfo virtio_ccw_device_info = {
1779 .name = TYPE_VIRTIO_CCW_DEVICE,
1780 .parent = TYPE_DEVICE,
1781 .instance_size = sizeof(VirtioCcwDevice),
1782 .class_init = virtio_ccw_device_class_init,
1783 .class_size = sizeof(VirtIOCCWDeviceClass),
1784 .abstract = true,
1785};
1786
1787
1788
1789
1790static int virtual_css_bridge_init(SysBusDevice *dev)
1791{
1792
1793 return 0;
1794}
1795
1796static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
1797{
1798 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1799 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
1800 DeviceClass *dc = DEVICE_CLASS(klass);
1801
1802 k->init = virtual_css_bridge_init;
1803 hc->unplug = virtio_ccw_busdev_unplug;
1804 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
1805}
1806
1807static const TypeInfo virtual_css_bridge_info = {
1808 .name = "virtual-css-bridge",
1809 .parent = TYPE_SYS_BUS_DEVICE,
1810 .instance_size = sizeof(SysBusDevice),
1811 .class_init = virtual_css_bridge_class_init,
1812 .interfaces = (InterfaceInfo[]) {
1813 { TYPE_HOTPLUG_HANDLER },
1814 { }
1815 }
1816};
1817
1818
1819
1820static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1821 VirtioCcwDevice *dev)
1822{
1823 DeviceState *qdev = DEVICE(dev);
1824 char virtio_bus_name[] = "virtio-bus";
1825
1826 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1827 qdev, virtio_bus_name);
1828}
1829
1830static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1831{
1832 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1833 BusClass *bus_class = BUS_CLASS(klass);
1834
1835 bus_class->max_dev = 1;
1836 k->notify = virtio_ccw_notify;
1837 k->vmstate_change = virtio_ccw_vmstate_change;
1838 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1839 k->set_host_notifier = virtio_ccw_set_host_notifier;
1840 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1841 k->save_queue = virtio_ccw_save_queue;
1842 k->load_queue = virtio_ccw_load_queue;
1843 k->save_config = virtio_ccw_save_config;
1844 k->load_config = virtio_ccw_load_config;
1845 k->device_plugged = virtio_ccw_device_plugged;
1846 k->post_plugged = virtio_ccw_post_plugged;
1847 k->device_unplugged = virtio_ccw_device_unplugged;
1848}
1849
1850static const TypeInfo virtio_ccw_bus_info = {
1851 .name = TYPE_VIRTIO_CCW_BUS,
1852 .parent = TYPE_VIRTIO_BUS,
1853 .instance_size = sizeof(VirtioCcwBusState),
1854 .class_init = virtio_ccw_bus_class_init,
1855};
1856
1857#ifdef CONFIG_VIRTFS
1858static Property virtio_ccw_9p_properties[] = {
1859 DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
1860 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1861 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1862 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1863 VIRTIO_CCW_MAX_REV),
1864 DEFINE_PROP_END_OF_LIST(),
1865};
1866
1867static void virtio_ccw_9p_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1868{
1869 V9fsCCWState *dev = VIRTIO_9P_CCW(ccw_dev);
1870 DeviceState *vdev = DEVICE(&dev->vdev);
1871 Error *err = NULL;
1872
1873 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1874 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1875 if (err) {
1876 error_propagate(errp, err);
1877 }
1878}
1879
1880static void virtio_ccw_9p_class_init(ObjectClass *klass, void *data)
1881{
1882 DeviceClass *dc = DEVICE_CLASS(klass);
1883 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1884
1885 k->exit = virtio_ccw_exit;
1886 k->realize = virtio_ccw_9p_realize;
1887 dc->reset = virtio_ccw_reset;
1888 dc->props = virtio_ccw_9p_properties;
1889 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1890}
1891
1892static void virtio_ccw_9p_instance_init(Object *obj)
1893{
1894 V9fsCCWState *dev = VIRTIO_9P_CCW(obj);
1895
1896 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1897 TYPE_VIRTIO_9P);
1898}
1899
1900static const TypeInfo virtio_ccw_9p_info = {
1901 .name = TYPE_VIRTIO_9P_CCW,
1902 .parent = TYPE_VIRTIO_CCW_DEVICE,
1903 .instance_size = sizeof(V9fsCCWState),
1904 .instance_init = virtio_ccw_9p_instance_init,
1905 .class_init = virtio_ccw_9p_class_init,
1906};
1907#endif
1908
1909static void virtio_ccw_register(void)
1910{
1911 type_register_static(&virtio_ccw_bus_info);
1912 type_register_static(&virtual_css_bus_info);
1913 type_register_static(&virtio_ccw_device_info);
1914 type_register_static(&virtio_ccw_serial);
1915 type_register_static(&virtio_ccw_blk);
1916 type_register_static(&virtio_ccw_net);
1917 type_register_static(&virtio_ccw_balloon);
1918 type_register_static(&virtio_ccw_scsi);
1919#ifdef CONFIG_VHOST_SCSI
1920 type_register_static(&vhost_ccw_scsi);
1921#endif
1922 type_register_static(&virtio_ccw_rng);
1923 type_register_static(&virtual_css_bridge_info);
1924#ifdef CONFIG_VIRTFS
1925 type_register_static(&virtio_ccw_9p_info);
1926#endif
1927}
1928
1929type_init(virtio_ccw_register)
1930
