1
2
3
4
5
6
7
8
9
10
11
12
13#include "qemu/osdep.h"
14#include "qapi/error.h"
15#include "sysemu/kvm.h"
16#include "net/net.h"
17#include "hw/virtio/virtio.h"
18#include "migration/qemu-file-types.h"
19#include "hw/virtio/virtio-net.h"
20#include "hw/sysbus.h"
21#include "qemu/bitops.h"
22#include "qemu/error-report.h"
23#include "qemu/module.h"
24#include "hw/virtio/virtio-access.h"
25#include "hw/virtio/virtio-bus.h"
26#include "hw/s390x/adapter.h"
27#include "hw/s390x/s390_flic.h"
28
29#include "hw/s390x/ioinst.h"
30#include "hw/s390x/css.h"
31#include "virtio-ccw.h"
32#include "trace.h"
33#include "hw/s390x/css-bridge.h"
34#include "hw/s390x/s390-virtio-ccw.h"
35
36#define NR_CLASSIC_INDICATOR_BITS 64
37
38static int virtio_ccw_dev_post_load(void *opaque, int version_id)
39{
40 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(opaque);
41 CcwDevice *ccw_dev = CCW_DEVICE(dev);
42 CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
43
44 ccw_dev->sch->driver_data = dev;
45 if (ccw_dev->sch->thinint_active) {
46 dev->routes.adapter.adapter_id = css_get_adapter_id(
47 CSS_IO_ADAPTER_VIRTIO,
48 dev->thinint_isc);
49 }
50
51 if (ck->refill_ids) {
52 ck->refill_ids(ccw_dev);
53 }
54 return 0;
55}
56
57typedef struct VirtioCcwDeviceTmp {
58 VirtioCcwDevice *parent;
59 uint16_t config_vector;
60} VirtioCcwDeviceTmp;
61
62static int virtio_ccw_dev_tmp_pre_save(void *opaque)
63{
64 VirtioCcwDeviceTmp *tmp = opaque;
65 VirtioCcwDevice *dev = tmp->parent;
66 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
67
68 tmp->config_vector = vdev->config_vector;
69
70 return 0;
71}
72
73static int virtio_ccw_dev_tmp_post_load(void *opaque, int version_id)
74{
75 VirtioCcwDeviceTmp *tmp = opaque;
76 VirtioCcwDevice *dev = tmp->parent;
77 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
78
79 vdev->config_vector = tmp->config_vector;
80 return 0;
81}
82
83const VMStateDescription vmstate_virtio_ccw_dev_tmp = {
84 .name = "s390_virtio_ccw_dev_tmp",
85 .pre_save = virtio_ccw_dev_tmp_pre_save,
86 .post_load = virtio_ccw_dev_tmp_post_load,
87 .fields = (VMStateField[]) {
88 VMSTATE_UINT16(config_vector, VirtioCcwDeviceTmp),
89 VMSTATE_END_OF_LIST()
90 }
91};
92
93const VMStateDescription vmstate_virtio_ccw_dev = {
94 .name = "s390_virtio_ccw_dev",
95 .version_id = 1,
96 .minimum_version_id = 1,
97 .post_load = virtio_ccw_dev_post_load,
98 .fields = (VMStateField[]) {
99 VMSTATE_CCW_DEVICE(parent_obj, VirtioCcwDevice),
100 VMSTATE_PTR_TO_IND_ADDR(indicators, VirtioCcwDevice),
101 VMSTATE_PTR_TO_IND_ADDR(indicators2, VirtioCcwDevice),
102 VMSTATE_PTR_TO_IND_ADDR(summary_indicator, VirtioCcwDevice),
103
104
105
106
107 VMSTATE_WITH_TMP(VirtioCcwDevice, VirtioCcwDeviceTmp,
108 vmstate_virtio_ccw_dev_tmp),
109 VMSTATE_STRUCT(routes, VirtioCcwDevice, 1, vmstate_adapter_routes,
110 AdapterRoutes),
111 VMSTATE_UINT8(thinint_isc, VirtioCcwDevice),
112 VMSTATE_INT32(revision, VirtioCcwDevice),
113 VMSTATE_END_OF_LIST()
114 }
115};
116
117static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
118 VirtioCcwDevice *dev);
119
120VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
121{
122 VirtIODevice *vdev = NULL;
123 VirtioCcwDevice *dev = sch->driver_data;
124
125 if (dev) {
126 vdev = virtio_bus_get_device(&dev->bus);
127 }
128 return vdev;
129}
130
131static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
132{
133 virtio_bus_start_ioeventfd(&dev->bus);
134}
135
136static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
137{
138 virtio_bus_stop_ioeventfd(&dev->bus);
139}
140
141static bool virtio_ccw_ioeventfd_enabled(DeviceState *d)
142{
143 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
144
145 return (dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) != 0;
146}
147
148static int virtio_ccw_ioeventfd_assign(DeviceState *d, EventNotifier *notifier,
149 int n, bool assign)
150{
151 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
152 CcwDevice *ccw_dev = CCW_DEVICE(dev);
153 SubchDev *sch = ccw_dev->sch;
154 uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
155
156 return s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
157}
158
159
160typedef struct VqInfoBlockLegacy {
161 uint64_t queue;
162 uint32_t align;
163 uint16_t index;
164 uint16_t num;
165} QEMU_PACKED VqInfoBlockLegacy;
166
167typedef struct VqInfoBlock {
168 uint64_t desc;
169 uint32_t res0;
170 uint16_t index;
171 uint16_t num;
172 uint64_t avail;
173 uint64_t used;
174} QEMU_PACKED VqInfoBlock;
175
176typedef struct VqConfigBlock {
177 uint16_t index;
178 uint16_t num_max;
179} QEMU_PACKED VqConfigBlock;
180
181typedef struct VirtioFeatDesc {
182 uint32_t features;
183 uint8_t index;
184} QEMU_PACKED VirtioFeatDesc;
185
186typedef struct VirtioThinintInfo {
187 hwaddr summary_indicator;
188 hwaddr device_indicator;
189 uint64_t ind_bit;
190 uint8_t isc;
191} QEMU_PACKED VirtioThinintInfo;
192
193typedef struct VirtioRevInfo {
194 uint16_t revision;
195 uint16_t length;
196 uint8_t data[0];
197} QEMU_PACKED VirtioRevInfo;
198
199
200static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info,
201 VqInfoBlockLegacy *linfo)
202{
203 VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
204 uint16_t index = info ? info->index : linfo->index;
205 uint16_t num = info ? info->num : linfo->num;
206 uint64_t desc = info ? info->desc : linfo->queue;
207
208 if (index >= VIRTIO_QUEUE_MAX) {
209 return -EINVAL;
210 }
211
212
213 if (linfo && desc && (linfo->align != 4096)) {
214 return -EINVAL;
215 }
216
217 if (!vdev) {
218 return -EINVAL;
219 }
220
221 if (info) {
222 virtio_queue_set_rings(vdev, index, desc, info->avail, info->used);
223 } else {
224 virtio_queue_set_addr(vdev, index, desc);
225 }
226 if (!desc) {
227 virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR);
228 } else {
229 if (info) {
230
231 if (virtio_queue_get_max_num(vdev, index) < num) {
232
233 return -EINVAL;
234 }
235 virtio_queue_set_num(vdev, index, num);
236 } else if (virtio_queue_get_num(vdev, index) > num) {
237
238 return -EINVAL;
239 }
240
241 virtio_queue_set_vector(vdev, index, index);
242 }
243
244 vdev->config_vector = VIRTIO_QUEUE_MAX;
245 return 0;
246}
247
248static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev)
249{
250 CcwDevice *ccw_dev = CCW_DEVICE(dev);
251
252 virtio_ccw_stop_ioeventfd(dev);
253 virtio_reset(vdev);
254 if (dev->indicators) {
255 release_indicator(&dev->routes.adapter, dev->indicators);
256 dev->indicators = NULL;
257 }
258 if (dev->indicators2) {
259 release_indicator(&dev->routes.adapter, dev->indicators2);
260 dev->indicators2 = NULL;
261 }
262 if (dev->summary_indicator) {
263 release_indicator(&dev->routes.adapter, dev->summary_indicator);
264 dev->summary_indicator = NULL;
265 }
266 ccw_dev->sch->thinint_active = false;
267}
268
269static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len,
270 bool is_legacy)
271{
272 int ret;
273 VqInfoBlock info;
274 VqInfoBlockLegacy linfo;
275 size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info);
276
277 if (check_len) {
278 if (ccw.count != info_len) {
279 return -EINVAL;
280 }
281 } else if (ccw.count < info_len) {
282
283 return -EINVAL;
284 }
285 if (!ccw.cda) {
286 return -EFAULT;
287 }
288 if (is_legacy) {
289 ccw_dstream_read(&sch->cds, linfo);
290 linfo.queue = be64_to_cpu(linfo.queue);
291 linfo.align = be32_to_cpu(linfo.align);
292 linfo.index = be16_to_cpu(linfo.index);
293 linfo.num = be16_to_cpu(linfo.num);
294 ret = virtio_ccw_set_vqs(sch, NULL, &linfo);
295 } else {
296 ccw_dstream_read(&sch->cds, info);
297 info.desc = be64_to_cpu(info.desc);
298 info.index = be16_to_cpu(info.index);
299 info.num = be16_to_cpu(info.num);
300 info.avail = be64_to_cpu(info.avail);
301 info.used = be64_to_cpu(info.used);
302 ret = virtio_ccw_set_vqs(sch, &info, NULL);
303 }
304 sch->curr_status.scsw.count = 0;
305 return ret;
306}
307
308static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
309{
310 int ret;
311 VirtioRevInfo revinfo;
312 uint8_t status;
313 VirtioFeatDesc features;
314 hwaddr indicators;
315 VqConfigBlock vq_config;
316 VirtioCcwDevice *dev = sch->driver_data;
317 VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
318 bool check_len;
319 int len;
320 VirtioThinintInfo thinint;
321
322 if (!dev) {
323 return -EINVAL;
324 }
325
326 trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
327 ccw.cmd_code);
328 check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
329
330 if (dev->force_revision_1 && dev->revision < 0 &&
331 ccw.cmd_code != CCW_CMD_SET_VIRTIO_REV) {
332
333
334
335
336 return -ENOSYS;
337 }
338
339
340 switch (ccw.cmd_code) {
341 case CCW_CMD_SET_VQ:
342 ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1);
343 break;
344 case CCW_CMD_VDEV_RESET:
345 virtio_ccw_reset_virtio(dev, vdev);
346 ret = 0;
347 break;
348 case CCW_CMD_READ_FEAT:
349 if (check_len) {
350 if (ccw.count != sizeof(features)) {
351 ret = -EINVAL;
352 break;
353 }
354 } else if (ccw.count < sizeof(features)) {
355
356 ret = -EINVAL;
357 break;
358 }
359 if (!ccw.cda) {
360 ret = -EFAULT;
361 } else {
362 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
363
364 ccw_dstream_advance(&sch->cds, sizeof(features.features));
365 ccw_dstream_read(&sch->cds, features.index);
366 if (features.index == 0) {
367 if (dev->revision >= 1) {
368
369 features.features = (uint32_t)
370 (vdev->host_features & ~vdc->legacy_features);
371 } else {
372 features.features = (uint32_t)vdev->host_features;
373 }
374 } else if ((features.index == 1) && (dev->revision >= 1)) {
375
376
377
378
379 features.features = (uint32_t)(vdev->host_features >> 32);
380 } else {
381
382 features.features = 0;
383 }
384 ccw_dstream_rewind(&sch->cds);
385 features.features = cpu_to_le32(features.features);
386 ccw_dstream_write(&sch->cds, features.features);
387 sch->curr_status.scsw.count = ccw.count - sizeof(features);
388 ret = 0;
389 }
390 break;
391 case CCW_CMD_WRITE_FEAT:
392 if (check_len) {
393 if (ccw.count != sizeof(features)) {
394 ret = -EINVAL;
395 break;
396 }
397 } else if (ccw.count < sizeof(features)) {
398
399 ret = -EINVAL;
400 break;
401 }
402 if (!ccw.cda) {
403 ret = -EFAULT;
404 } else {
405 ccw_dstream_read(&sch->cds, features);
406 features.features = le32_to_cpu(features.features);
407 if (features.index == 0) {
408 virtio_set_features(vdev,
409 (vdev->guest_features & 0xffffffff00000000ULL) |
410 features.features);
411 } else if ((features.index == 1) && (dev->revision >= 1)) {
412
413
414
415
416
417 virtio_set_features(vdev,
418 (vdev->guest_features & 0x00000000ffffffffULL) |
419 ((uint64_t)features.features << 32));
420 } else {
421
422
423
424
425 if (features.features) {
426 qemu_log_mask(LOG_GUEST_ERROR,
427 "Guest bug: features[%i]=%x (expected 0)",
428 features.index, features.features);
429
430 }
431 }
432 sch->curr_status.scsw.count = ccw.count - sizeof(features);
433 ret = 0;
434 }
435 break;
436 case CCW_CMD_READ_CONF:
437 if (check_len) {
438 if (ccw.count > vdev->config_len) {
439 ret = -EINVAL;
440 break;
441 }
442 }
443 len = MIN(ccw.count, vdev->config_len);
444 if (!ccw.cda) {
445 ret = -EFAULT;
446 } else {
447 virtio_bus_get_vdev_config(&dev->bus, vdev->config);
448 ccw_dstream_write_buf(&sch->cds, vdev->config, len);
449 sch->curr_status.scsw.count = ccw.count - len;
450 ret = 0;
451 }
452 break;
453 case CCW_CMD_WRITE_CONF:
454 if (check_len) {
455 if (ccw.count > vdev->config_len) {
456 ret = -EINVAL;
457 break;
458 }
459 }
460 len = MIN(ccw.count, vdev->config_len);
461 if (!ccw.cda) {
462 ret = -EFAULT;
463 } else {
464 ret = ccw_dstream_read_buf(&sch->cds, vdev->config, len);
465 if (!ret) {
466 virtio_bus_set_vdev_config(&dev->bus, vdev->config);
467 sch->curr_status.scsw.count = ccw.count - len;
468 }
469 }
470 break;
471 case CCW_CMD_READ_STATUS:
472 if (check_len) {
473 if (ccw.count != sizeof(status)) {
474 ret = -EINVAL;
475 break;
476 }
477 } else if (ccw.count < sizeof(status)) {
478
479 ret = -EINVAL;
480 break;
481 }
482 if (!ccw.cda) {
483 ret = -EFAULT;
484 } else {
485 address_space_stb(&address_space_memory, ccw.cda, vdev->status,
486 MEMTXATTRS_UNSPECIFIED, NULL);
487 sch->curr_status.scsw.count = ccw.count - sizeof(vdev->status);
488 ret = 0;
489 }
490 break;
491 case CCW_CMD_WRITE_STATUS:
492 if (check_len) {
493 if (ccw.count != sizeof(status)) {
494 ret = -EINVAL;
495 break;
496 }
497 } else if (ccw.count < sizeof(status)) {
498
499 ret = -EINVAL;
500 break;
501 }
502 if (!ccw.cda) {
503 ret = -EFAULT;
504 } else {
505 ccw_dstream_read(&sch->cds, status);
506 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
507 virtio_ccw_stop_ioeventfd(dev);
508 }
509 if (virtio_set_status(vdev, status) == 0) {
510 if (vdev->status == 0) {
511 virtio_ccw_reset_virtio(dev, vdev);
512 }
513 if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
514 virtio_ccw_start_ioeventfd(dev);
515 }
516 sch->curr_status.scsw.count = ccw.count - sizeof(status);
517 ret = 0;
518 } else {
519
520 ret = -ENOSYS;
521 }
522 }
523 break;
524 case CCW_CMD_SET_IND:
525 if (check_len) {
526 if (ccw.count != sizeof(indicators)) {
527 ret = -EINVAL;
528 break;
529 }
530 } else if (ccw.count < sizeof(indicators)) {
531
532 ret = -EINVAL;
533 break;
534 }
535 if (sch->thinint_active) {
536
537 ret = -ENOSYS;
538 break;
539 }
540 if (virtio_get_num_queues(vdev) > NR_CLASSIC_INDICATOR_BITS) {
541
542 ret = -ENOSYS;
543 break;
544 }
545 if (!ccw.cda) {
546 ret = -EFAULT;
547 } else {
548 ccw_dstream_read(&sch->cds, indicators);
549 indicators = be64_to_cpu(indicators);
550 dev->indicators = get_indicator(indicators, sizeof(uint64_t));
551 sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
552 ret = 0;
553 }
554 break;
555 case CCW_CMD_SET_CONF_IND:
556 if (check_len) {
557 if (ccw.count != sizeof(indicators)) {
558 ret = -EINVAL;
559 break;
560 }
561 } else if (ccw.count < sizeof(indicators)) {
562
563 ret = -EINVAL;
564 break;
565 }
566 if (!ccw.cda) {
567 ret = -EFAULT;
568 } else {
569 ccw_dstream_read(&sch->cds, indicators);
570 indicators = be64_to_cpu(indicators);
571 dev->indicators2 = get_indicator(indicators, sizeof(uint64_t));
572 sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
573 ret = 0;
574 }
575 break;
576 case CCW_CMD_READ_VQ_CONF:
577 if (check_len) {
578 if (ccw.count != sizeof(vq_config)) {
579 ret = -EINVAL;
580 break;
581 }
582 } else if (ccw.count < sizeof(vq_config)) {
583
584 ret = -EINVAL;
585 break;
586 }
587 if (!ccw.cda) {
588 ret = -EFAULT;
589 } else {
590 ccw_dstream_read(&sch->cds, vq_config.index);
591 vq_config.index = be16_to_cpu(vq_config.index);
592 if (vq_config.index >= VIRTIO_QUEUE_MAX) {
593 ret = -EINVAL;
594 break;
595 }
596 vq_config.num_max = virtio_queue_get_num(vdev,
597 vq_config.index);
598 vq_config.num_max = cpu_to_be16(vq_config.num_max);
599 ccw_dstream_write(&sch->cds, vq_config.num_max);
600 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
601 ret = 0;
602 }
603 break;
604 case CCW_CMD_SET_IND_ADAPTER:
605 if (check_len) {
606 if (ccw.count != sizeof(thinint)) {
607 ret = -EINVAL;
608 break;
609 }
610 } else if (ccw.count < sizeof(thinint)) {
611
612 ret = -EINVAL;
613 break;
614 }
615 if (!ccw.cda) {
616 ret = -EFAULT;
617 } else if (dev->indicators && !sch->thinint_active) {
618
619 ret = -ENOSYS;
620 } else {
621 if (ccw_dstream_read(&sch->cds, thinint)) {
622 ret = -EFAULT;
623 } else {
624 thinint.ind_bit = be64_to_cpu(thinint.ind_bit);
625 thinint.summary_indicator =
626 be64_to_cpu(thinint.summary_indicator);
627 thinint.device_indicator =
628 be64_to_cpu(thinint.device_indicator);
629
630 dev->summary_indicator =
631 get_indicator(thinint.summary_indicator, sizeof(uint8_t));
632 dev->indicators =
633 get_indicator(thinint.device_indicator,
634 thinint.ind_bit / 8 + 1);
635 dev->thinint_isc = thinint.isc;
636 dev->routes.adapter.ind_offset = thinint.ind_bit;
637 dev->routes.adapter.summary_offset = 7;
638 dev->routes.adapter.adapter_id = css_get_adapter_id(
639 CSS_IO_ADAPTER_VIRTIO,
640 dev->thinint_isc);
641 sch->thinint_active = ((dev->indicators != NULL) &&
642 (dev->summary_indicator != NULL));
643 sch->curr_status.scsw.count = ccw.count - sizeof(thinint);
644 ret = 0;
645 }
646 }
647 break;
648 case CCW_CMD_SET_VIRTIO_REV:
649 len = sizeof(revinfo);
650 if (ccw.count < len) {
651 ret = -EINVAL;
652 break;
653 }
654 if (!ccw.cda) {
655 ret = -EFAULT;
656 break;
657 }
658 ccw_dstream_read_buf(&sch->cds, &revinfo, 4);
659 revinfo.revision = be16_to_cpu(revinfo.revision);
660 revinfo.length = be16_to_cpu(revinfo.length);
661 if (ccw.count < len + revinfo.length ||
662 (check_len && ccw.count > len + revinfo.length)) {
663 ret = -EINVAL;
664 break;
665 }
666
667
668
669
670 if (dev->revision >= 0 ||
671 revinfo.revision > virtio_ccw_rev_max(dev) ||
672 (dev->force_revision_1 && !revinfo.revision)) {
673 ret = -ENOSYS;
674 break;
675 }
676 ret = 0;
677 dev->revision = revinfo.revision;
678 break;
679 default:
680 ret = -ENOSYS;
681 break;
682 }
683 return ret;
684}
685
686static void virtio_sch_disable_cb(SubchDev *sch)
687{
688 VirtioCcwDevice *dev = sch->driver_data;
689
690 dev->revision = -1;
691}
692
693static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
694{
695 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
696 CcwDevice *ccw_dev = CCW_DEVICE(dev);
697 CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
698 SubchDev *sch;
699 Error *err = NULL;
700
701 sch = css_create_sch(ccw_dev->devno, errp);
702 if (!sch) {
703 return;
704 }
705 if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) {
706 error_setg(&err, "Invalid value of property max_rev "
707 "(is %d expected >= 1)", virtio_ccw_rev_max(dev));
708 goto out_err;
709 }
710
711 sch->driver_data = dev;
712 sch->ccw_cb = virtio_ccw_cb;
713 sch->disable_cb = virtio_sch_disable_cb;
714 sch->id.reserved = 0xff;
715 sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
716 sch->do_subchannel_work = do_subchannel_work_virtual;
717 ccw_dev->sch = sch;
718 dev->indicators = NULL;
719 dev->revision = -1;
720 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
721
722 trace_virtio_ccw_new_device(
723 sch->cssid, sch->ssid, sch->schid, sch->devno,
724 ccw_dev->devno.valid ? "user-configured" : "auto-configured");
725
726 if (kvm_enabled() && !kvm_eventfds_enabled()) {
727 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
728 }
729
730 if (k->realize) {
731 k->realize(dev, &err);
732 if (err) {
733 goto out_err;
734 }
735 }
736
737 ck->realize(ccw_dev, &err);
738 if (err) {
739 goto out_err;
740 }
741
742 return;
743
744out_err:
745 error_propagate(errp, err);
746 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
747 ccw_dev->sch = NULL;
748 g_free(sch);
749}
750
751static void virtio_ccw_device_unrealize(VirtioCcwDevice *dev, Error **errp)
752{
753 VirtIOCCWDeviceClass *dc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
754 CcwDevice *ccw_dev = CCW_DEVICE(dev);
755 SubchDev *sch = ccw_dev->sch;
756
757 if (dc->unrealize) {
758 dc->unrealize(dev, errp);
759 }
760
761 if (sch) {
762 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
763 g_free(sch);
764 ccw_dev->sch = NULL;
765 }
766 if (dev->indicators) {
767 release_indicator(&dev->routes.adapter, dev->indicators);
768 dev->indicators = NULL;
769 }
770}
771
772
773
774
775static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
776{
777 CcwDevice *ccw_dev = to_ccw_dev_fast(d);
778
779 return container_of(ccw_dev, VirtioCcwDevice, parent_obj);
780}
781
782static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc,
783 uint8_t to_be_set)
784{
785 uint8_t ind_old, ind_new;
786 hwaddr len = 1;
787 uint8_t *ind_addr;
788
789 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
790 if (!ind_addr) {
791 error_report("%s(%x.%x.%04x): unable to access indicator",
792 __func__, sch->cssid, sch->ssid, sch->schid);
793 return -1;
794 }
795 do {
796 ind_old = *ind_addr;
797 ind_new = ind_old | to_be_set;
798 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
799 trace_virtio_ccw_set_ind(ind_loc, ind_old, ind_new);
800 cpu_physical_memory_unmap(ind_addr, len, 1, len);
801
802 return ind_old;
803}
804
805static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
806{
807 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
808 CcwDevice *ccw_dev = to_ccw_dev_fast(d);
809 SubchDev *sch = ccw_dev->sch;
810 uint64_t indicators;
811
812 if (vector == VIRTIO_NO_VECTOR) {
813 return;
814 }
815
816
817
818
819
820 assert(vector <= VIRTIO_QUEUE_MAX);
821
822 if (vector < VIRTIO_QUEUE_MAX) {
823 if (!dev->indicators) {
824 return;
825 }
826 if (sch->thinint_active) {
827
828
829
830
831
832
833 uint64_t ind_bit = dev->routes.adapter.ind_offset;
834
835 virtio_set_ind_atomic(sch, dev->indicators->addr +
836 (ind_bit + vector) / 8,
837 0x80 >> ((ind_bit + vector) % 8));
838 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr,
839 0x01)) {
840 css_adapter_interrupt(CSS_IO_ADAPTER_VIRTIO, dev->thinint_isc);
841 }
842 } else {
843 assert(vector < NR_CLASSIC_INDICATOR_BITS);
844 indicators = address_space_ldq(&address_space_memory,
845 dev->indicators->addr,
846 MEMTXATTRS_UNSPECIFIED,
847 NULL);
848 indicators |= 1ULL << vector;
849 address_space_stq(&address_space_memory, dev->indicators->addr,
850 indicators, MEMTXATTRS_UNSPECIFIED, NULL);
851 css_conditional_io_interrupt(sch);
852 }
853 } else {
854 if (!dev->indicators2) {
855 return;
856 }
857 indicators = address_space_ldq(&address_space_memory,
858 dev->indicators2->addr,
859 MEMTXATTRS_UNSPECIFIED,
860 NULL);
861 indicators |= 1ULL;
862 address_space_stq(&address_space_memory, dev->indicators2->addr,
863 indicators, MEMTXATTRS_UNSPECIFIED, NULL);
864 css_conditional_io_interrupt(sch);
865 }
866}
867
868static void virtio_ccw_reset(DeviceState *d)
869{
870 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
871 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
872 VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
873
874 virtio_ccw_reset_virtio(dev, vdev);
875 if (vdc->parent_reset) {
876 vdc->parent_reset(d);
877 }
878}
879
880static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
881{
882 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
883
884 if (running) {
885 virtio_ccw_start_ioeventfd(dev);
886 } else {
887 virtio_ccw_stop_ioeventfd(dev);
888 }
889}
890
891static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
892{
893 CcwDevice *dev = CCW_DEVICE(d);
894
895 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
896}
897
898static int virtio_ccw_get_mappings(VirtioCcwDevice *dev)
899{
900 int r;
901 CcwDevice *ccw_dev = CCW_DEVICE(dev);
902
903 if (!ccw_dev->sch->thinint_active) {
904 return -EINVAL;
905 }
906
907 r = map_indicator(&dev->routes.adapter, dev->summary_indicator);
908 if (r) {
909 return r;
910 }
911 r = map_indicator(&dev->routes.adapter, dev->indicators);
912 if (r) {
913 return r;
914 }
915 dev->routes.adapter.summary_addr = dev->summary_indicator->map;
916 dev->routes.adapter.ind_addr = dev->indicators->map;
917
918 return 0;
919}
920
921static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs)
922{
923 int i;
924 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
925 int ret;
926 S390FLICState *fs = s390_get_flic();
927 S390FLICStateClass *fsc = s390_get_flic_class(fs);
928
929 ret = virtio_ccw_get_mappings(dev);
930 if (ret) {
931 return ret;
932 }
933 for (i = 0; i < nvqs; i++) {
934 if (!virtio_queue_get_num(vdev, i)) {
935 break;
936 }
937 }
938 dev->routes.num_routes = i;
939 return fsc->add_adapter_routes(fs, &dev->routes);
940}
941
942static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs)
943{
944 S390FLICState *fs = s390_get_flic();
945 S390FLICStateClass *fsc = s390_get_flic_class(fs);
946
947 fsc->release_adapter_routes(fs, &dev->routes);
948}
949
950static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n)
951{
952 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
953 VirtQueue *vq = virtio_get_queue(vdev, n);
954 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
955
956 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL,
957 dev->routes.gsi[n]);
958}
959
960static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n)
961{
962 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
963 VirtQueue *vq = virtio_get_queue(vdev, n);
964 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
965 int ret;
966
967 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier,
968 dev->routes.gsi[n]);
969 assert(ret == 0);
970}
971
972static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
973 bool assign, bool with_irqfd)
974{
975 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
976 VirtQueue *vq = virtio_get_queue(vdev, n);
977 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
978 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
979
980 if (assign) {
981 int r = event_notifier_init(notifier, 0);
982
983 if (r < 0) {
984 return r;
985 }
986 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
987 if (with_irqfd) {
988 r = virtio_ccw_add_irqfd(dev, n);
989 if (r) {
990 virtio_queue_set_guest_notifier_fd_handler(vq, false,
991 with_irqfd);
992 return r;
993 }
994 }
995
996
997
998
999 if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
1000 k->guest_notifier_mask(vdev, n, false);
1001 }
1002
1003 if (k->guest_notifier_pending &&
1004 k->guest_notifier_pending(vdev, n)) {
1005 event_notifier_set(notifier);
1006 }
1007 } else {
1008 if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
1009 k->guest_notifier_mask(vdev, n, true);
1010 }
1011 if (with_irqfd) {
1012 virtio_ccw_remove_irqfd(dev, n);
1013 }
1014 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
1015 event_notifier_cleanup(notifier);
1016 }
1017 return 0;
1018}
1019
1020static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
1021 bool assigned)
1022{
1023 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1024 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1025 CcwDevice *ccw_dev = CCW_DEVICE(d);
1026 bool with_irqfd = ccw_dev->sch->thinint_active && kvm_irqfds_enabled();
1027 int r, n;
1028
1029 if (with_irqfd && assigned) {
1030
1031 r = virtio_ccw_setup_irqroutes(dev, nvqs);
1032 if (r < 0) {
1033 goto irqroute_error;
1034 }
1035 }
1036 for (n = 0; n < nvqs; n++) {
1037 if (!virtio_queue_get_num(vdev, n)) {
1038 break;
1039 }
1040 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd);
1041 if (r < 0) {
1042 goto assign_error;
1043 }
1044 }
1045 if (with_irqfd && !assigned) {
1046
1047 virtio_ccw_release_irqroutes(dev, nvqs);
1048 }
1049 return 0;
1050
1051assign_error:
1052 while (--n >= 0) {
1053 virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
1054 }
1055irqroute_error:
1056 if (with_irqfd && assigned) {
1057 virtio_ccw_release_irqroutes(dev, nvqs);
1058 }
1059 return r;
1060}
1061
1062static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f)
1063{
1064 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1065 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1066
1067 qemu_put_be16(f, virtio_queue_vector(vdev, n));
1068}
1069
1070static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f)
1071{
1072 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1073 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1074 uint16_t vector;
1075
1076 qemu_get_be16s(f, &vector);
1077 virtio_queue_set_vector(vdev, n , vector);
1078
1079 return 0;
1080}
1081
1082static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
1083{
1084 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1085 vmstate_save_state(f, &vmstate_virtio_ccw_dev, dev, NULL);
1086}
1087
1088static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
1089{
1090 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1091 return vmstate_load_state(f, &vmstate_virtio_ccw_dev, dev, 1);
1092}
1093
1094static void virtio_ccw_pre_plugged(DeviceState *d, Error **errp)
1095{
1096 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1097 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1098
1099 if (dev->max_rev >= 1) {
1100 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1101 }
1102}
1103
1104
1105static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
1106{
1107 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1108 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1109 CcwDevice *ccw_dev = CCW_DEVICE(d);
1110 SubchDev *sch = ccw_dev->sch;
1111 int n = virtio_get_num_queues(vdev);
1112 S390FLICState *flic = s390_get_flic();
1113
1114 if (!virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1115 dev->max_rev = 0;
1116 }
1117
1118 if (virtio_get_num_queues(vdev) > VIRTIO_QUEUE_MAX) {
1119 error_setg(errp, "The number of virtqueues %d "
1120 "exceeds virtio limit %d", n,
1121 VIRTIO_QUEUE_MAX);
1122 return;
1123 }
1124 if (virtio_get_num_queues(vdev) > flic->adapter_routes_max_batch) {
1125 error_setg(errp, "The number of virtqueues %d "
1126 "exceeds flic adapter route limit %d", n,
1127 flic->adapter_routes_max_batch);
1128 return;
1129 }
1130
1131 sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);
1132
1133
1134 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
1135 d->hotplugged, 1);
1136}
1137
1138static void virtio_ccw_device_unplugged(DeviceState *d)
1139{
1140 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1141
1142 virtio_ccw_stop_ioeventfd(dev);
1143}
1144
1145
1146static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp)
1147{
1148 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1149
1150 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1151 virtio_ccw_device_realize(_dev, errp);
1152}
1153
1154static void virtio_ccw_busdev_unrealize(DeviceState *dev, Error **errp)
1155{
1156 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1157
1158 virtio_ccw_device_unrealize(_dev, errp);
1159}
1160
1161static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev,
1162 DeviceState *dev, Error **errp)
1163{
1164 VirtioCcwDevice *_dev = to_virtio_ccw_dev_fast(dev);
1165
1166 virtio_ccw_stop_ioeventfd(_dev);
1167}
1168
1169static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1170{
1171 DeviceClass *dc = DEVICE_CLASS(klass);
1172 CCWDeviceClass *k = CCW_DEVICE_CLASS(dc);
1173 VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_CLASS(klass);
1174
1175 k->unplug = virtio_ccw_busdev_unplug;
1176 dc->realize = virtio_ccw_busdev_realize;
1177 dc->unrealize = virtio_ccw_busdev_unrealize;
1178 dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1179 device_class_set_parent_reset(dc, virtio_ccw_reset, &vdc->parent_reset);
1180}
1181
1182static const TypeInfo virtio_ccw_device_info = {
1183 .name = TYPE_VIRTIO_CCW_DEVICE,
1184 .parent = TYPE_CCW_DEVICE,
1185 .instance_size = sizeof(VirtioCcwDevice),
1186 .class_init = virtio_ccw_device_class_init,
1187 .class_size = sizeof(VirtIOCCWDeviceClass),
1188 .abstract = true,
1189};
1190
1191
1192
1193static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1194 VirtioCcwDevice *dev)
1195{
1196 DeviceState *qdev = DEVICE(dev);
1197 char virtio_bus_name[] = "virtio-bus";
1198
1199 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1200 qdev, virtio_bus_name);
1201}
1202
1203static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1204{
1205 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1206 BusClass *bus_class = BUS_CLASS(klass);
1207
1208 bus_class->max_dev = 1;
1209 k->notify = virtio_ccw_notify;
1210 k->vmstate_change = virtio_ccw_vmstate_change;
1211 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1212 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1213 k->save_queue = virtio_ccw_save_queue;
1214 k->load_queue = virtio_ccw_load_queue;
1215 k->save_config = virtio_ccw_save_config;
1216 k->load_config = virtio_ccw_load_config;
1217 k->pre_plugged = virtio_ccw_pre_plugged;
1218 k->device_plugged = virtio_ccw_device_plugged;
1219 k->device_unplugged = virtio_ccw_device_unplugged;
1220 k->ioeventfd_enabled = virtio_ccw_ioeventfd_enabled;
1221 k->ioeventfd_assign = virtio_ccw_ioeventfd_assign;
1222}
1223
1224static const TypeInfo virtio_ccw_bus_info = {
1225 .name = TYPE_VIRTIO_CCW_BUS,
1226 .parent = TYPE_VIRTIO_BUS,
1227 .instance_size = sizeof(VirtioCcwBusState),
1228 .class_init = virtio_ccw_bus_class_init,
1229};
1230
1231static void virtio_ccw_register(void)
1232{
1233 type_register_static(&virtio_ccw_bus_info);
1234 type_register_static(&virtio_ccw_device_info);
1235}
1236
1237type_init(virtio_ccw_register)
1238
