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migration: refine the compression code
[qemu/ar7.git] / hw / s390x / virtio-ccw.c
blob2192be8774b956c47aebd7fb88c0445faecf9cd6
1 /*
2 * virtio ccw target implementation
3 *
4 * Copyright 2012,2015 IBM Corp.
5 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
6 * Pierre Morel <pmorel@linux.vnet.ibm.com>
7 *
8 * This work is licensed under the terms of the GNU GPL, version 2 or (at
9 * your option) any later version. See the COPYING file in the top-level
10 * directory.
11 */
12
13 #include "qemu/osdep.h"
14 #include "qapi/error.h"
15 #include "hw/hw.h"
16 #include "sysemu/block-backend.h"
17 #include "sysemu/blockdev.h"
18 #include "sysemu/sysemu.h"
19 #include "sysemu/kvm.h"
20 #include "net/net.h"
21 #include "hw/virtio/virtio.h"
22 #include "hw/virtio/virtio-serial.h"
23 #include "hw/virtio/virtio-net.h"
24 #include "hw/sysbus.h"
25 #include "qemu/bitops.h"
26 #include "qemu/error-report.h"
27 #include "hw/virtio/virtio-access.h"
28 #include "hw/virtio/virtio-bus.h"
29 #include "hw/s390x/adapter.h"
30 #include "hw/s390x/s390_flic.h"
31
32 #include "hw/s390x/ioinst.h"
33 #include "hw/s390x/css.h"
34 #include "virtio-ccw.h"
35 #include "trace.h"
36
37 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
38 VirtioCcwDevice *dev);
39
40 static void virtual_css_bus_reset(BusState *qbus)
41 {
42 /* This should actually be modelled via the generic css */
43 css_reset();
44 }
45
46
47 static 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
54 static 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
61 VirtIODevice *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
72 static 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
104 static 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 /* Disable ioeventfd for this device. */
137 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
138 error_report("%s: failed. Fallback to userspace (slower).", __func__);
139 }
140
141 static 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
160 VirtualCssBus *virtual_css_bus_init(void)
161 {
162 VirtualCssBus *cbus;
163 BusState *bus;
164 DeviceState *dev;
165
166 /* Create bridge device */
167 dev = qdev_create(NULL, "virtual-css-bridge");
168 qdev_init_nofail(dev);
169
170 /* Create bus on bridge device */
171 bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
172 cbus = VIRTUAL_CSS_BUS(bus);
173
174 /* Enable hotplugging */
175 qbus_set_hotplug_handler(bus, dev, &error_abort);
176
177 return cbus;
178 }
179
180 /* Communication blocks used by several channel commands. */
181 typedef struct VqInfoBlockLegacy {
182 uint64_t queue;
183 uint32_t align;
184 uint16_t index;
185 uint16_t num;
186 } QEMU_PACKED VqInfoBlockLegacy;
187
188 typedef 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
197 typedef struct VqConfigBlock {
198 uint16_t index;
199 uint16_t num_max;
200 } QEMU_PACKED VqConfigBlock;
201
202 typedef struct VirtioFeatDesc {
203 uint32_t features;
204 uint8_t index;
205 } QEMU_PACKED VirtioFeatDesc;
206
207 typedef struct VirtioThinintInfo {
208 hwaddr summary_indicator;
209 hwaddr device_indicator;
210 uint64_t ind_bit;
211 uint8_t isc;
212 } QEMU_PACKED VirtioThinintInfo;
213
214 typedef struct VirtioRevInfo {
215 uint16_t revision;
216 uint16_t length;
217 uint8_t data[0];
218 } QEMU_PACKED VirtioRevInfo;
219
220 /* Specify where the virtqueues for the subchannel are in guest memory. */
221 static 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 /* Current code in virtio.c relies on 4K alignment. */
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 /* virtio-1 allows changing the ring size. */
252 if (virtio_queue_get_num(vdev, index) < num) {
253 /* Fail if we exceed the maximum number. */
254 return -EINVAL;
255 }
256 virtio_queue_set_num(vdev, index, num);
257 } else if (virtio_queue_get_num(vdev, index) > num) {
258 /* Fail if we don't have a big enough queue. */
259 return -EINVAL;
260 }
261 /* We ignore possible increased num for legacy for compatibility. */
262 virtio_queue_set_vector(vdev, index, index);
263 }
264 /* tell notify handler in case of config change */
265 vdev->config_vector = VIRTIO_CCW_QUEUE_MAX;
266 return 0;
267 }
268
269 static 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
288 static 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 /* Can't execute command. */
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
357 static 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 /* Look at the command. */
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 /* Can't execute command. */
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 /* Don't offer legacy features for modern devices. */
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 * Only offer feature bits beyond 31 if the guest has
420 * negotiated at least revision 1.
421 */
422 features.features = (uint32_t)(vdev->host_features >> 32);
423 } else {
424 /* Return zeroes if the guest supports more feature bits. */
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 /* Can't execute command. */
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 * If the guest did not negotiate at least revision 1,
464 * we did not offer it any feature bits beyond 31. Such a
465 * guest passing us any bit here is therefore buggy.
466 */
467 virtio_set_features(vdev,
468 (vdev->guest_features & 0x00000000ffffffffULL) |
469 ((uint64_t)features.features << 32));
470 } else {
471 /*
472 * If the guest supports more feature bits, assert that it
473 * passes us zeroes for those we don't support.
474 */
475 if (features.features) {
476 fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n",
477 features.index, features.features);
478 /* XXX: do a unit check here? */
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 /* XXX config space endianness */
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 /* XXX config space endianness */
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 /* Can't execute command. */
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 /* Trigger a command reject. */
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 /* Can't execute command. */
571 ret = -EINVAL;
572 break;
573 }
574 if (sch->thinint_active) {
575 /* Trigger a command reject. */
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 /* Can't execute command. */
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 /* Can't execute command. */
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 /* Can't execute command. */
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 /* Trigger a command reject. */
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 * Once we start to support revisions with additional data, we'll
714 * need to fetch it here. Nothing to do for now, though.
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
731 static void virtio_sch_disable_cb(SubchDev *sch)
732 {
733 VirtioCcwDevice *dev = sch->driver_data;
734
735 dev->revision = -1;
736 }
737
738 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
739 {
740 unsigned int schid;
741 bool found = false;
742 SubchDev *sch;
743 Error *err = NULL;
744 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
745
746 sch = g_malloc0(sizeof(SubchDev));
747
748 sch->driver_data = dev;
749 dev->sch = sch;
750
751 dev->indicators = NULL;
752
753 /* Initialize subchannel structure. */
754 sch->channel_prog = 0x0;
755 sch->last_cmd_valid = false;
756 sch->thinint_active = false;
757 /*
758 * Use a device number if provided. Otherwise, fall back to subchannel
759 * number.
760 */
761 if (dev->bus_id.valid) {
762 /* Enforce use of virtual cssid. */
763 if (dev->bus_id.cssid != VIRTUAL_CSSID) {
764 error_setg(errp, "cssid %x not valid for virtio devices",
765 dev->bus_id.cssid);
766 goto out_err;
767 }
768 if (css_devno_used(dev->bus_id.cssid, dev->bus_id.ssid,
769 dev->bus_id.devid)) {
770 error_setg(errp, "Device %x.%x.%04x already exists",
771 dev->bus_id.cssid, dev->bus_id.ssid,
772 dev->bus_id.devid);
773 goto out_err;
774 }
775 sch->cssid = dev->bus_id.cssid;
776 sch->ssid = dev->bus_id.ssid;
777 sch->devno = dev->bus_id.devid;
778
779 /* Find the next free id. */
780 for (schid = 0; schid <= MAX_SCHID; schid++) {
781 if (!css_find_subch(1, sch->cssid, sch->ssid, schid)) {
782 sch->schid = schid;
783 css_subch_assign(sch->cssid, sch->ssid, sch->schid,
784 sch->devno, sch);
785 found = true;
786 break;
787 }
788 }
789 if (!found) {
790 error_setg(errp, "No free subchannel found for %x.%x.%04x",
791 sch->cssid, sch->ssid, sch->devno);
792 goto out_err;
793 }
794 trace_virtio_ccw_new_device(sch->cssid, sch->ssid, sch->schid,
795 sch->devno, "user-configured");
796 } else {
797 unsigned int cssid = VIRTUAL_CSSID, ssid, devno;
798
799 for (ssid = 0; ssid <= MAX_SSID; ssid++) {
800 for (schid = 0; schid <= MAX_SCHID; schid++) {
801 if (!css_find_subch(1, cssid, ssid, schid)) {
802 sch->cssid = cssid;
803 sch->ssid = ssid;
804 sch->schid = schid;
805 devno = schid;
806 /*
807 * If the devno is already taken, look further in this
808 * subchannel set.
809 */
810 while (css_devno_used(cssid, ssid, devno)) {
811 if (devno == MAX_SCHID) {
812 devno = 0;
813 } else if (devno == schid - 1) {
814 error_setg(errp, "No free devno found");
815 goto out_err;
816 } else {
817 devno++;
818 }
819 }
820 sch->devno = devno;
821 css_subch_assign(cssid, ssid, schid, devno, sch);
822 found = true;
823 break;
824 }
825 }
826 if (found) {
827 break;
828 }
829 }
830 if (!found) {
831 error_setg(errp, "Virtual channel subsystem is full!");
832 goto out_err;
833 }
834 trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
835 "auto-configured");
836 }
837
838 /* Build initial schib. */
839 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
840
841 sch->ccw_cb = virtio_ccw_cb;
842 sch->disable_cb = virtio_sch_disable_cb;
843
844 /* Build senseid data. */
845 memset(&sch->id, 0, sizeof(SenseId));
846 sch->id.reserved = 0xff;
847 sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
848
849 dev->revision = -1;
850
851 if (k->realize) {
852 k->realize(dev, &err);
853 }
854 if (err) {
855 error_propagate(errp, err);
856 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
857 goto out_err;
858 }
859
860 return;
861
862 out_err:
863 dev->sch = NULL;
864 g_free(sch);
865 }
866
867 static int virtio_ccw_exit(VirtioCcwDevice *dev)
868 {
869 SubchDev *sch = dev->sch;
870
871 if (sch) {
872 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
873 g_free(sch);
874 }
875 if (dev->indicators) {
876 release_indicator(&dev->routes.adapter, dev->indicators);
877 dev->indicators = NULL;
878 }
879 return 0;
880 }
881
882 static void virtio_ccw_net_realize(VirtioCcwDevice *ccw_dev, Error **errp)
883 {
884 DeviceState *qdev = DEVICE(ccw_dev);
885 VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev);
886 DeviceState *vdev = DEVICE(&dev->vdev);
887 Error *err = NULL;
888
889 virtio_net_set_netclient_name(&dev->vdev, qdev->id,
890 object_get_typename(OBJECT(qdev)));
891 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
892 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
893 if (err) {
894 error_propagate(errp, err);
895 }
896 }
897
898 static void virtio_ccw_net_instance_init(Object *obj)
899 {
900 VirtIONetCcw *dev = VIRTIO_NET_CCW(obj);
901
902 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
903 TYPE_VIRTIO_NET);
904 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
905 "bootindex", &error_abort);
906 }
907
908 static void virtio_ccw_blk_realize(VirtioCcwDevice *ccw_dev, Error **errp)
909 {
910 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev);
911 DeviceState *vdev = DEVICE(&dev->vdev);
912 Error *err = NULL;
913
914 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
915 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
916 if (err) {
917 error_propagate(errp, err);
918 }
919 }
920
921 static void virtio_ccw_blk_instance_init(Object *obj)
922 {
923 VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj);
924
925 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
926 TYPE_VIRTIO_BLK);
927 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
928 &error_abort);
929 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
930 "bootindex", &error_abort);
931 }
932
933 static void virtio_ccw_serial_realize(VirtioCcwDevice *ccw_dev, Error **errp)
934 {
935 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev);
936 DeviceState *vdev = DEVICE(&dev->vdev);
937 DeviceState *proxy = DEVICE(ccw_dev);
938 Error *err = NULL;
939 char *bus_name;
940
941 /*
942 * For command line compatibility, this sets the virtio-serial-device bus
943 * name as before.
944 */
945 if (proxy->id) {
946 bus_name = g_strdup_printf("%s.0", proxy->id);
947 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
948 g_free(bus_name);
949 }
950
951 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
952 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
953 if (err) {
954 error_propagate(errp, err);
955 }
956 }
957
958
959 static void virtio_ccw_serial_instance_init(Object *obj)
960 {
961 VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj);
962
963 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
964 TYPE_VIRTIO_SERIAL);
965 }
966
967 static void virtio_ccw_balloon_realize(VirtioCcwDevice *ccw_dev, Error **errp)
968 {
969 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev);
970 DeviceState *vdev = DEVICE(&dev->vdev);
971 Error *err = NULL;
972
973 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
974 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
975 if (err) {
976 error_propagate(errp, err);
977 }
978 }
979
980 static void virtio_ccw_balloon_instance_init(Object *obj)
981 {
982 VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj);
983
984 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
985 TYPE_VIRTIO_BALLOON);
986 object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev),
987 "guest-stats", &error_abort);
988 object_property_add_alias(obj, "guest-stats-polling-interval",
989 OBJECT(&dev->vdev),
990 "guest-stats-polling-interval", &error_abort);
991 }
992
993 static void virtio_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp)
994 {
995 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev);
996 DeviceState *vdev = DEVICE(&dev->vdev);
997 DeviceState *qdev = DEVICE(ccw_dev);
998 Error *err = NULL;
999 char *bus_name;
1000
1001 /*
1002 * For command line compatibility, this sets the virtio-scsi-device bus
1003 * name as before.
1004 */
1005 if (qdev->id) {
1006 bus_name = g_strdup_printf("%s.0", qdev->id);
1007 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1008 g_free(bus_name);
1009 }
1010
1011 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1012 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1013 if (err) {
1014 error_propagate(errp, err);
1015 }
1016 }
1017
1018 static void virtio_ccw_scsi_instance_init(Object *obj)
1019 {
1020 VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj);
1021
1022 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1023 TYPE_VIRTIO_SCSI);
1024 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread",
1025 &error_abort);
1026 }
1027
1028 #ifdef CONFIG_VHOST_SCSI
1029 static void vhost_ccw_scsi_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1030 {
1031 VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
1032 DeviceState *vdev = DEVICE(&dev->vdev);
1033 Error *err = NULL;
1034
1035 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1036 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1037 if (err) {
1038 error_propagate(errp, err);
1039 }
1040 }
1041
1042 static void vhost_ccw_scsi_instance_init(Object *obj)
1043 {
1044 VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
1045
1046 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1047 TYPE_VHOST_SCSI);
1048 }
1049 #endif
1050
1051 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1052 {
1053 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
1054 DeviceState *vdev = DEVICE(&dev->vdev);
1055 Error *err = NULL;
1056
1057 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1058 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1059 if (err) {
1060 error_propagate(errp, err);
1061 return;
1062 }
1063
1064 object_property_set_link(OBJECT(dev),
1065 OBJECT(dev->vdev.conf.rng), "rng",
1066 NULL);
1067 }
1068
1069 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
1070 * be careful and test performance if you change this.
1071 */
1072 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
1073 {
1074 return container_of(d, VirtioCcwDevice, parent_obj);
1075 }
1076
1077 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc,
1078 uint8_t to_be_set)
1079 {
1080 uint8_t ind_old, ind_new;
1081 hwaddr len = 1;
1082 uint8_t *ind_addr;
1083
1084 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
1085 if (!ind_addr) {
1086 error_report("%s(%x.%x.%04x): unable to access indicator",
1087 __func__, sch->cssid, sch->ssid, sch->schid);
1088 return -1;
1089 }
1090 do {
1091 ind_old = *ind_addr;
1092 ind_new = ind_old | to_be_set;
1093 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
1094 trace_virtio_ccw_set_ind(ind_loc, ind_old, ind_new);
1095 cpu_physical_memory_unmap(ind_addr, len, 1, len);
1096
1097 return ind_old;
1098 }
1099
1100 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
1101 {
1102 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
1103 SubchDev *sch = dev->sch;
1104 uint64_t indicators;
1105
1106 /* queue indicators + secondary indicators */
1107 if (vector >= VIRTIO_CCW_QUEUE_MAX + 64) {
1108 return;
1109 }
1110
1111 if (vector < VIRTIO_CCW_QUEUE_MAX) {
1112 if (!dev->indicators) {
1113 return;
1114 }
1115 if (sch->thinint_active) {
1116 /*
1117 * In the adapter interrupt case, indicators points to a
1118 * memory area that may be (way) larger than 64 bit and
1119 * ind_bit indicates the start of the indicators in a big
1120 * endian notation.
1121 */
1122 uint64_t ind_bit = dev->routes.adapter.ind_offset;
1123
1124 virtio_set_ind_atomic(sch, dev->indicators->addr +
1125 (ind_bit + vector) / 8,
1126 0x80 >> ((ind_bit + vector) % 8));
1127 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr,
1128 0x01)) {
1129 css_adapter_interrupt(dev->thinint_isc);
1130 }
1131 } else {
1132 indicators = address_space_ldq(&address_space_memory,
1133 dev->indicators->addr,
1134 MEMTXATTRS_UNSPECIFIED,
1135 NULL);
1136 indicators |= 1ULL << vector;
1137 address_space_stq(&address_space_memory, dev->indicators->addr,
1138 indicators, MEMTXATTRS_UNSPECIFIED, NULL);
1139 css_conditional_io_interrupt(sch);
1140 }
1141 } else {
1142 if (!dev->indicators2) {
1143 return;
1144 }
1145 vector = 0;
1146 indicators = address_space_ldq(&address_space_memory,
1147 dev->indicators2->addr,
1148 MEMTXATTRS_UNSPECIFIED,
1149 NULL);
1150 indicators |= 1ULL << vector;
1151 address_space_stq(&address_space_memory, dev->indicators2->addr,
1152 indicators, MEMTXATTRS_UNSPECIFIED, NULL);
1153 css_conditional_io_interrupt(sch);
1154 }
1155 }
1156
1157 static void virtio_ccw_reset(DeviceState *d)
1158 {
1159 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1160 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1161
1162 virtio_ccw_reset_virtio(dev, vdev);
1163 css_reset_sch(dev->sch);
1164 }
1165
1166 static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
1167 {
1168 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1169
1170 if (running) {
1171 virtio_ccw_start_ioeventfd(dev);
1172 } else {
1173 virtio_ccw_stop_ioeventfd(dev);
1174 }
1175 }
1176
1177 static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
1178 {
1179 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1180
1181 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
1182 }
1183
1184 static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
1185 {
1186 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1187
1188 /* Stop using the generic ioeventfd, we are doing eventfd handling
1189 * ourselves below */
1190 dev->ioeventfd_disabled = assign;
1191 if (assign) {
1192 virtio_ccw_stop_ioeventfd(dev);
1193 }
1194 return virtio_ccw_set_guest2host_notifier(dev, n, assign, false);
1195 }
1196
1197 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev)
1198 {
1199 int r;
1200
1201 if (!dev->sch->thinint_active) {
1202 return -EINVAL;
1203 }
1204
1205 r = map_indicator(&dev->routes.adapter, dev->summary_indicator);
1206 if (r) {
1207 return r;
1208 }
1209 r = map_indicator(&dev->routes.adapter, dev->indicators);
1210 if (r) {
1211 return r;
1212 }
1213 dev->routes.adapter.summary_addr = dev->summary_indicator->map;
1214 dev->routes.adapter.ind_addr = dev->indicators->map;
1215
1216 return 0;
1217 }
1218
1219 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs)
1220 {
1221 int i;
1222 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1223 int ret;
1224 S390FLICState *fs = s390_get_flic();
1225 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
1226
1227 ret = virtio_ccw_get_mappings(dev);
1228 if (ret) {
1229 return ret;
1230 }
1231 for (i = 0; i < nvqs; i++) {
1232 if (!virtio_queue_get_num(vdev, i)) {
1233 break;
1234 }
1235 }
1236 dev->routes.num_routes = i;
1237 return fsc->add_adapter_routes(fs, &dev->routes);
1238 }
1239
1240 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs)
1241 {
1242 S390FLICState *fs = s390_get_flic();
1243 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
1244
1245 fsc->release_adapter_routes(fs, &dev->routes);
1246 }
1247
1248 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n)
1249 {
1250 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1251 VirtQueue *vq = virtio_get_queue(vdev, n);
1252 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1253
1254 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL,
1255 dev->routes.gsi[n]);
1256 }
1257
1258 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n)
1259 {
1260 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1261 VirtQueue *vq = virtio_get_queue(vdev, n);
1262 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1263 int ret;
1264
1265 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier,
1266 dev->routes.gsi[n]);
1267 assert(ret == 0);
1268 }
1269
1270 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
1271 bool assign, bool with_irqfd)
1272 {
1273 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1274 VirtQueue *vq = virtio_get_queue(vdev, n);
1275 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1276 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
1277
1278 if (assign) {
1279 int r = event_notifier_init(notifier, 0);
1280
1281 if (r < 0) {
1282 return r;
1283 }
1284 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
1285 if (with_irqfd) {
1286 r = virtio_ccw_add_irqfd(dev, n);
1287 if (r) {
1288 virtio_queue_set_guest_notifier_fd_handler(vq, false,
1289 with_irqfd);
1290 return r;
1291 }
1292 }
1293 /*
1294 * We do not support individual masking for channel devices, so we
1295 * need to manually trigger any guest masking callbacks here.
1296 */
1297 if (k->guest_notifier_mask) {
1298 k->guest_notifier_mask(vdev, n, false);
1299 }
1300 /* get lost events and re-inject */
1301 if (k->guest_notifier_pending &&
1302 k->guest_notifier_pending(vdev, n)) {
1303 event_notifier_set(notifier);
1304 }
1305 } else {
1306 if (k->guest_notifier_mask) {
1307 k->guest_notifier_mask(vdev, n, true);
1308 }
1309 if (with_irqfd) {
1310 virtio_ccw_remove_irqfd(dev, n);
1311 }
1312 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
1313 event_notifier_cleanup(notifier);
1314 }
1315 return 0;
1316 }
1317
1318 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
1319 bool assigned)
1320 {
1321 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1322 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1323 bool with_irqfd = dev->sch->thinint_active && kvm_irqfds_enabled();
1324 int r, n;
1325
1326 if (with_irqfd && assigned) {
1327 /* irq routes need to be set up before assigning irqfds */
1328 r = virtio_ccw_setup_irqroutes(dev, nvqs);
1329 if (r < 0) {
1330 goto irqroute_error;
1331 }
1332 }
1333 for (n = 0; n < nvqs; n++) {
1334 if (!virtio_queue_get_num(vdev, n)) {
1335 break;
1336 }
1337 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd);
1338 if (r < 0) {
1339 goto assign_error;
1340 }
1341 }
1342 if (with_irqfd && !assigned) {
1343 /* release irq routes after irqfds have been released */
1344 virtio_ccw_release_irqroutes(dev, nvqs);
1345 }
1346 return 0;
1347
1348 assign_error:
1349 while (--n >= 0) {
1350 virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
1351 }
1352 irqroute_error:
1353 if (with_irqfd && assigned) {
1354 virtio_ccw_release_irqroutes(dev, nvqs);
1355 }
1356 return r;
1357 }
1358
1359 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f)
1360 {
1361 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1362 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1363
1364 qemu_put_be16(f, virtio_queue_vector(vdev, n));
1365 }
1366
1367 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f)
1368 {
1369 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1370 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1371 uint16_t vector;
1372
1373 qemu_get_be16s(f, &vector);
1374 virtio_queue_set_vector(vdev, n , vector);
1375
1376 return 0;
1377 }
1378
1379 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
1380 {
1381 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1382 SubchDev *s = dev->sch;
1383 VirtIODevice *vdev = virtio_ccw_get_vdev(s);
1384
1385 subch_device_save(s, f);
1386 if (dev->indicators != NULL) {
1387 qemu_put_be32(f, dev->indicators->len);
1388 qemu_put_be64(f, dev->indicators->addr);
1389 } else {
1390 qemu_put_be32(f, 0);
1391 qemu_put_be64(f, 0UL);
1392 }
1393 if (dev->indicators2 != NULL) {
1394 qemu_put_be32(f, dev->indicators2->len);
1395 qemu_put_be64(f, dev->indicators2->addr);
1396 } else {
1397 qemu_put_be32(f, 0);
1398 qemu_put_be64(f, 0UL);
1399 }
1400 if (dev->summary_indicator != NULL) {
1401 qemu_put_be32(f, dev->summary_indicator->len);
1402 qemu_put_be64(f, dev->summary_indicator->addr);
1403 } else {
1404 qemu_put_be32(f, 0);
1405 qemu_put_be64(f, 0UL);
1406 }
1407 qemu_put_be16(f, vdev->config_vector);
1408 qemu_put_be64(f, dev->routes.adapter.ind_offset);
1409 qemu_put_byte(f, dev->thinint_isc);
1410 qemu_put_be32(f, dev->revision);
1411 }
1412
1413 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
1414 {
1415 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1416 SubchDev *s = dev->sch;
1417 VirtIODevice *vdev = virtio_ccw_get_vdev(s);
1418 int len;
1419
1420 s->driver_data = dev;
1421 subch_device_load(s, f);
1422 len = qemu_get_be32(f);
1423 if (len != 0) {
1424 dev->indicators = get_indicator(qemu_get_be64(f), len);
1425 } else {
1426 qemu_get_be64(f);
1427 dev->indicators = NULL;
1428 }
1429 len = qemu_get_be32(f);
1430 if (len != 0) {
1431 dev->indicators2 = get_indicator(qemu_get_be64(f), len);
1432 } else {
1433 qemu_get_be64(f);
1434 dev->indicators2 = NULL;
1435 }
1436 len = qemu_get_be32(f);
1437 if (len != 0) {
1438 dev->summary_indicator = get_indicator(qemu_get_be64(f), len);
1439 } else {
1440 qemu_get_be64(f);
1441 dev->summary_indicator = NULL;
1442 }
1443 qemu_get_be16s(f, &vdev->config_vector);
1444 dev->routes.adapter.ind_offset = qemu_get_be64(f);
1445 dev->thinint_isc = qemu_get_byte(f);
1446 dev->revision = qemu_get_be32(f);
1447 if (s->thinint_active) {
1448 return css_register_io_adapter(CSS_IO_ADAPTER_VIRTIO,
1449 dev->thinint_isc, true, false,
1450 &dev->routes.adapter.adapter_id);
1451 }
1452
1453 return 0;
1454 }
1455
1456 /* This is called by virtio-bus just after the device is plugged. */
1457 static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
1458 {
1459 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1460 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1461 SubchDev *sch = dev->sch;
1462 int n = virtio_get_num_queues(vdev);
1463
1464 if (virtio_get_num_queues(vdev) > VIRTIO_CCW_QUEUE_MAX) {
1465 error_setg(errp, "The number of virtqueues %d "
1466 "exceeds ccw limit %d", n,
1467 VIRTIO_CCW_QUEUE_MAX);
1468 return;
1469 }
1470
1471 if (!kvm_eventfds_enabled()) {
1472 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
1473 }
1474
1475 sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);
1476
1477 if (dev->max_rev >= 1) {
1478 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1479 }
1480
1481 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
1482 d->hotplugged, 1);
1483 }
1484
1485 static void virtio_ccw_post_plugged(DeviceState *d, Error **errp)
1486 {
1487 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1488 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1489
1490 if (!virtio_host_has_feature(vdev, VIRTIO_F_VERSION_1)) {
1491 /* A backend didn't support modern virtio. */
1492 dev->max_rev = 0;
1493 }
1494 }
1495
1496 static void virtio_ccw_device_unplugged(DeviceState *d)
1497 {
1498 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1499
1500 virtio_ccw_stop_ioeventfd(dev);
1501 }
1502 /**************** Virtio-ccw Bus Device Descriptions *******************/
1503
1504 static Property virtio_ccw_net_properties[] = {
1505 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, bus_id),
1506 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1507 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1508 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1509 VIRTIO_CCW_MAX_REV),
1510 DEFINE_PROP_END_OF_LIST(),
1511 };
1512
1513 static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
1514 {
1515 DeviceClass *dc = DEVICE_CLASS(klass);
1516 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1517
1518 k->realize = virtio_ccw_net_realize;
1519 k->exit = virtio_ccw_exit;
1520 dc->reset = virtio_ccw_reset;
1521 dc->props = virtio_ccw_net_properties;
1522 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1523 }
1524
1525 static const TypeInfo virtio_ccw_net = {
1526 .name = TYPE_VIRTIO_NET_CCW,
1527 .parent = TYPE_VIRTIO_CCW_DEVICE,
1528 .instance_size = sizeof(VirtIONetCcw),
1529 .instance_init = virtio_ccw_net_instance_init,
1530 .class_init = virtio_ccw_net_class_init,
1531 };
1532
1533 static Property virtio_ccw_blk_properties[] = {
1534 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, bus_id),
1535 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1536 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1537 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1538 VIRTIO_CCW_MAX_REV),
1539 DEFINE_PROP_END_OF_LIST(),
1540 };
1541
1542 static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
1543 {
1544 DeviceClass *dc = DEVICE_CLASS(klass);
1545 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1546
1547 k->realize = virtio_ccw_blk_realize;
1548 k->exit = virtio_ccw_exit;
1549 dc->reset = virtio_ccw_reset;
1550 dc->props = virtio_ccw_blk_properties;
1551 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1552 }
1553
1554 static const TypeInfo virtio_ccw_blk = {
1555 .name = TYPE_VIRTIO_BLK_CCW,
1556 .parent = TYPE_VIRTIO_CCW_DEVICE,
1557 .instance_size = sizeof(VirtIOBlkCcw),
1558 .instance_init = virtio_ccw_blk_instance_init,
1559 .class_init = virtio_ccw_blk_class_init,
1560 };
1561
1562 static Property virtio_ccw_serial_properties[] = {
1563 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, bus_id),
1564 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1565 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1566 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1567 VIRTIO_CCW_MAX_REV),
1568 DEFINE_PROP_END_OF_LIST(),
1569 };
1570
1571 static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
1572 {
1573 DeviceClass *dc = DEVICE_CLASS(klass);
1574 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1575
1576 k->realize = virtio_ccw_serial_realize;
1577 k->exit = virtio_ccw_exit;
1578 dc->reset = virtio_ccw_reset;
1579 dc->props = virtio_ccw_serial_properties;
1580 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
1581 }
1582
1583 static const TypeInfo virtio_ccw_serial = {
1584 .name = TYPE_VIRTIO_SERIAL_CCW,
1585 .parent = TYPE_VIRTIO_CCW_DEVICE,
1586 .instance_size = sizeof(VirtioSerialCcw),
1587 .instance_init = virtio_ccw_serial_instance_init,
1588 .class_init = virtio_ccw_serial_class_init,
1589 };
1590
1591 static Property virtio_ccw_balloon_properties[] = {
1592 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, bus_id),
1593 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1594 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1595 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1596 VIRTIO_CCW_MAX_REV),
1597 DEFINE_PROP_END_OF_LIST(),
1598 };
1599
1600 static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
1601 {
1602 DeviceClass *dc = DEVICE_CLASS(klass);
1603 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1604
1605 k->realize = virtio_ccw_balloon_realize;
1606 k->exit = virtio_ccw_exit;
1607 dc->reset = virtio_ccw_reset;
1608 dc->props = virtio_ccw_balloon_properties;
1609 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1610 }
1611
1612 static const TypeInfo virtio_ccw_balloon = {
1613 .name = TYPE_VIRTIO_BALLOON_CCW,
1614 .parent = TYPE_VIRTIO_CCW_DEVICE,
1615 .instance_size = sizeof(VirtIOBalloonCcw),
1616 .instance_init = virtio_ccw_balloon_instance_init,
1617 .class_init = virtio_ccw_balloon_class_init,
1618 };
1619
1620 static Property virtio_ccw_scsi_properties[] = {
1621 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, bus_id),
1622 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1623 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1624 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1625 VIRTIO_CCW_MAX_REV),
1626 DEFINE_PROP_END_OF_LIST(),
1627 };
1628
1629 static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
1630 {
1631 DeviceClass *dc = DEVICE_CLASS(klass);
1632 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1633
1634 k->realize = virtio_ccw_scsi_realize;
1635 k->exit = virtio_ccw_exit;
1636 dc->reset = virtio_ccw_reset;
1637 dc->props = virtio_ccw_scsi_properties;
1638 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1639 }
1640
1641 static const TypeInfo virtio_ccw_scsi = {
1642 .name = TYPE_VIRTIO_SCSI_CCW,
1643 .parent = TYPE_VIRTIO_CCW_DEVICE,
1644 .instance_size = sizeof(VirtIOSCSICcw),
1645 .instance_init = virtio_ccw_scsi_instance_init,
1646 .class_init = virtio_ccw_scsi_class_init,
1647 };
1648
1649 #ifdef CONFIG_VHOST_SCSI
1650 static Property vhost_ccw_scsi_properties[] = {
1651 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, bus_id),
1652 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1653 VIRTIO_CCW_MAX_REV),
1654 DEFINE_PROP_END_OF_LIST(),
1655 };
1656
1657 static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
1658 {
1659 DeviceClass *dc = DEVICE_CLASS(klass);
1660 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1661
1662 k->realize = vhost_ccw_scsi_realize;
1663 k->exit = virtio_ccw_exit;
1664 dc->reset = virtio_ccw_reset;
1665 dc->props = vhost_ccw_scsi_properties;
1666 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1667 }
1668
1669 static const TypeInfo vhost_ccw_scsi = {
1670 .name = TYPE_VHOST_SCSI_CCW,
1671 .parent = TYPE_VIRTIO_CCW_DEVICE,
1672 .instance_size = sizeof(VHostSCSICcw),
1673 .instance_init = vhost_ccw_scsi_instance_init,
1674 .class_init = vhost_ccw_scsi_class_init,
1675 };
1676 #endif
1677
1678 static void virtio_ccw_rng_instance_init(Object *obj)
1679 {
1680 VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
1681
1682 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1683 TYPE_VIRTIO_RNG);
1684 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev),
1685 "rng", &error_abort);
1686 }
1687
1688 static Property virtio_ccw_rng_properties[] = {
1689 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, bus_id),
1690 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1691 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1692 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1693 VIRTIO_CCW_MAX_REV),
1694 DEFINE_PROP_END_OF_LIST(),
1695 };
1696
1697 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
1698 {
1699 DeviceClass *dc = DEVICE_CLASS(klass);
1700 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1701
1702 k->realize = virtio_ccw_rng_realize;
1703 k->exit = virtio_ccw_exit;
1704 dc->reset = virtio_ccw_reset;
1705 dc->props = virtio_ccw_rng_properties;
1706 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1707 }
1708
1709 static const TypeInfo virtio_ccw_rng = {
1710 .name = TYPE_VIRTIO_RNG_CCW,
1711 .parent = TYPE_VIRTIO_CCW_DEVICE,
1712 .instance_size = sizeof(VirtIORNGCcw),
1713 .instance_init = virtio_ccw_rng_instance_init,
1714 .class_init = virtio_ccw_rng_class_init,
1715 };
1716
1717 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp)
1718 {
1719 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1720
1721 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1722 virtio_ccw_device_realize(_dev, errp);
1723 }
1724
1725 static int virtio_ccw_busdev_exit(DeviceState *dev)
1726 {
1727 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1728 VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
1729
1730 return _info->exit(_dev);
1731 }
1732
1733 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev,
1734 DeviceState *dev, Error **errp)
1735 {
1736 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1737 SubchDev *sch = _dev->sch;
1738
1739 virtio_ccw_stop_ioeventfd(_dev);
1740
1741 /*
1742 * We should arrive here only for device_del, since we don't support
1743 * direct hot(un)plug of channels, but only through virtio.
1744 */
1745 assert(sch != NULL);
1746 /* Subchannel is now disabled and no longer valid. */
1747 sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
1748 PMCW_FLAGS_MASK_DNV);
1749
1750 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
1751
1752 object_unparent(OBJECT(dev));
1753 }
1754
1755 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1756 {
1757 DeviceClass *dc = DEVICE_CLASS(klass);
1758
1759 dc->realize = virtio_ccw_busdev_realize;
1760 dc->exit = virtio_ccw_busdev_exit;
1761 dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1762 }
1763
1764 static const TypeInfo virtio_ccw_device_info = {
1765 .name = TYPE_VIRTIO_CCW_DEVICE,
1766 .parent = TYPE_DEVICE,
1767 .instance_size = sizeof(VirtioCcwDevice),
1768 .class_init = virtio_ccw_device_class_init,
1769 .class_size = sizeof(VirtIOCCWDeviceClass),
1770 .abstract = true,
1771 };
1772
1773 /***************** Virtual-css Bus Bridge Device ********************/
1774 /* Only required to have the virtio bus as child in the system bus */
1775
1776 static int virtual_css_bridge_init(SysBusDevice *dev)
1777 {
1778 /* nothing */
1779 return 0;
1780 }
1781
1782 static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
1783 {
1784 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1785 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
1786 DeviceClass *dc = DEVICE_CLASS(klass);
1787
1788 k->init = virtual_css_bridge_init;
1789 hc->unplug = virtio_ccw_busdev_unplug;
1790 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
1791 }
1792
1793 static const TypeInfo virtual_css_bridge_info = {
1794 .name = "virtual-css-bridge",
1795 .parent = TYPE_SYS_BUS_DEVICE,
1796 .instance_size = sizeof(SysBusDevice),
1797 .class_init = virtual_css_bridge_class_init,
1798 .interfaces = (InterfaceInfo[]) {
1799 { TYPE_HOTPLUG_HANDLER },
1800 { }
1801 }
1802 };
1803
1804 /* virtio-ccw-bus */
1805
1806 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1807 VirtioCcwDevice *dev)
1808 {
1809 DeviceState *qdev = DEVICE(dev);
1810 char virtio_bus_name[] = "virtio-bus";
1811
1812 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1813 qdev, virtio_bus_name);
1814 }
1815
1816 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1817 {
1818 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1819 BusClass *bus_class = BUS_CLASS(klass);
1820
1821 bus_class->max_dev = 1;
1822 k->notify = virtio_ccw_notify;
1823 k->vmstate_change = virtio_ccw_vmstate_change;
1824 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1825 k->set_host_notifier = virtio_ccw_set_host_notifier;
1826 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1827 k->save_queue = virtio_ccw_save_queue;
1828 k->load_queue = virtio_ccw_load_queue;
1829 k->save_config = virtio_ccw_save_config;
1830 k->load_config = virtio_ccw_load_config;
1831 k->device_plugged = virtio_ccw_device_plugged;
1832 k->post_plugged = virtio_ccw_post_plugged;
1833 k->device_unplugged = virtio_ccw_device_unplugged;
1834 }
1835
1836 static const TypeInfo virtio_ccw_bus_info = {
1837 .name = TYPE_VIRTIO_CCW_BUS,
1838 .parent = TYPE_VIRTIO_BUS,
1839 .instance_size = sizeof(VirtioCcwBusState),
1840 .class_init = virtio_ccw_bus_class_init,
1841 };
1842
1843 #ifdef CONFIG_VIRTFS
1844 static Property virtio_ccw_9p_properties[] = {
1845 DEFINE_PROP_CSS_DEV_ID("devno", VirtioCcwDevice, bus_id),
1846 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
1847 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
1848 DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
1849 VIRTIO_CCW_MAX_REV),
1850 DEFINE_PROP_END_OF_LIST(),
1851 };
1852
1853 static void virtio_ccw_9p_realize(VirtioCcwDevice *ccw_dev, Error **errp)
1854 {
1855 V9fsCCWState *dev = VIRTIO_9P_CCW(ccw_dev);
1856 DeviceState *vdev = DEVICE(&dev->vdev);
1857 Error *err = NULL;
1858
1859 qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
1860 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
1861 if (err) {
1862 error_propagate(errp, err);
1863 }
1864 }
1865
1866 static void virtio_ccw_9p_class_init(ObjectClass *klass, void *data)
1867 {
1868 DeviceClass *dc = DEVICE_CLASS(klass);
1869 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
1870
1871 k->exit = virtio_ccw_exit;
1872 k->realize = virtio_ccw_9p_realize;
1873 dc->reset = virtio_ccw_reset;
1874 dc->props = virtio_ccw_9p_properties;
1875 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1876 }
1877
1878 static void virtio_ccw_9p_instance_init(Object *obj)
1879 {
1880 V9fsCCWState *dev = VIRTIO_9P_CCW(obj);
1881
1882 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1883 TYPE_VIRTIO_9P);
1884 }
1885
1886 static const TypeInfo virtio_ccw_9p_info = {
1887 .name = TYPE_VIRTIO_9P_CCW,
1888 .parent = TYPE_VIRTIO_CCW_DEVICE,
1889 .instance_size = sizeof(V9fsCCWState),
1890 .instance_init = virtio_ccw_9p_instance_init,
1891 .class_init = virtio_ccw_9p_class_init,
1892 };
1893 #endif
1894
1895 static void virtio_ccw_register(void)
1896 {
1897 type_register_static(&virtio_ccw_bus_info);
1898 type_register_static(&virtual_css_bus_info);
1899 type_register_static(&virtio_ccw_device_info);
1900 type_register_static(&virtio_ccw_serial);
1901 type_register_static(&virtio_ccw_blk);
1902 type_register_static(&virtio_ccw_net);
1903 type_register_static(&virtio_ccw_balloon);
1904 type_register_static(&virtio_ccw_scsi);
1905 #ifdef CONFIG_VHOST_SCSI
1906 type_register_static(&vhost_ccw_scsi);
1907 #endif
1908 type_register_static(&virtio_ccw_rng);
1909 type_register_static(&virtual_css_bridge_info);
1910 #ifdef CONFIG_VIRTFS
1911 type_register_static(&virtio_ccw_9p_info);
1912 #endif
1913 }
1914
1915 type_init(virtio_ccw_register)
AR7 emulation for QEMU