1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17#include "qemu/osdep.h"
18#include <linux/vfio.h>
19#include <linux/vfio_ccw.h>
20#include <sys/ioctl.h>
21
22#include "qapi/error.h"
23#include "hw/sysbus.h"
24#include "hw/vfio/vfio.h"
25#include "hw/vfio/vfio-common.h"
26#include "hw/s390x/s390-ccw.h"
27#include "hw/s390x/vfio-ccw.h"
28#include "hw/qdev-properties.h"
29#include "hw/s390x/ccw-device.h"
30#include "exec/address-spaces.h"
31#include "qemu/error-report.h"
32#include "qemu/main-loop.h"
33#include "qemu/module.h"
34
35struct VFIOCCWDevice {
36 S390CCWDevice cdev;
37 VFIODevice vdev;
38 uint64_t io_region_size;
39 uint64_t io_region_offset;
40 struct ccw_io_region *io_region;
41 uint64_t async_cmd_region_size;
42 uint64_t async_cmd_region_offset;
43 struct ccw_cmd_region *async_cmd_region;
44 uint64_t schib_region_size;
45 uint64_t schib_region_offset;
46 struct ccw_schib_region *schib_region;
47 uint64_t crw_region_size;
48 uint64_t crw_region_offset;
49 struct ccw_crw_region *crw_region;
50 EventNotifier io_notifier;
51 EventNotifier crw_notifier;
52 EventNotifier req_notifier;
53 bool force_orb_pfch;
54 bool warned_orb_pfch;
55};
56
57static inline void warn_once_pfch(VFIOCCWDevice *vcdev, SubchDev *sch,
58 const char *msg)
59{
60 warn_report_once_cond(&vcdev->warned_orb_pfch,
61 "vfio-ccw (devno %x.%x.%04x): %s",
62 sch->cssid, sch->ssid, sch->devno, msg);
63}
64
65static void vfio_ccw_compute_needs_reset(VFIODevice *vdev)
66{
67 vdev->needs_reset = false;
68}
69
70
71
72
73
74struct VFIODeviceOps vfio_ccw_ops = {
75 .vfio_compute_needs_reset = vfio_ccw_compute_needs_reset,
76};
77
78static IOInstEnding vfio_ccw_handle_request(SubchDev *sch)
79{
80 S390CCWDevice *cdev = sch->driver_data;
81 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
82 struct ccw_io_region *region = vcdev->io_region;
83 int ret;
84
85 if (!(sch->orb.ctrl0 & ORB_CTRL0_MASK_PFCH) && vcdev->force_orb_pfch) {
86 sch->orb.ctrl0 |= ORB_CTRL0_MASK_PFCH;
87 warn_once_pfch(vcdev, sch, "PFCH flag forced");
88 }
89
90 QEMU_BUILD_BUG_ON(sizeof(region->orb_area) != sizeof(ORB));
91 QEMU_BUILD_BUG_ON(sizeof(region->scsw_area) != sizeof(SCSW));
92 QEMU_BUILD_BUG_ON(sizeof(region->irb_area) != sizeof(IRB));
93
94 memset(region, 0, sizeof(*region));
95
96 memcpy(region->orb_area, &sch->orb, sizeof(ORB));
97 memcpy(region->scsw_area, &sch->curr_status.scsw, sizeof(SCSW));
98
99again:
100 ret = pwrite(vcdev->vdev.fd, region,
101 vcdev->io_region_size, vcdev->io_region_offset);
102 if (ret != vcdev->io_region_size) {
103 if (errno == EAGAIN) {
104 goto again;
105 }
106 error_report("vfio-ccw: write I/O region failed with errno=%d", errno);
107 ret = errno ? -errno : -EFAULT;
108 } else {
109 ret = 0;
110 }
111 switch (ret) {
112 case 0:
113 return IOINST_CC_EXPECTED;
114 case -EBUSY:
115 return IOINST_CC_BUSY;
116 case -ENODEV:
117 case -EACCES:
118 return IOINST_CC_NOT_OPERATIONAL;
119 case -EFAULT:
120 default:
121 sch_gen_unit_exception(sch);
122 css_inject_io_interrupt(sch);
123 return IOINST_CC_EXPECTED;
124 }
125}
126
127static IOInstEnding vfio_ccw_handle_store(SubchDev *sch)
128{
129 S390CCWDevice *cdev = sch->driver_data;
130 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
131 SCHIB *schib = &sch->curr_status;
132 struct ccw_schib_region *region = vcdev->schib_region;
133 SCHIB *s;
134 int ret;
135
136
137 if (!region) {
138 return IOINST_CC_EXPECTED;
139 }
140
141 memset(region, 0, sizeof(*region));
142 ret = pread(vcdev->vdev.fd, region, vcdev->schib_region_size,
143 vcdev->schib_region_offset);
144
145 if (ret == -1) {
146
147
148
149
150
151 error_report("vfio-ccw: store region read failed with errno=%d", errno);
152 return IOINST_CC_EXPECTED;
153 }
154
155
156
157
158
159 s = (SCHIB *)region->schib_area;
160 schib->pmcw.pnom = s->pmcw.pnom;
161 schib->pmcw.lpum = s->pmcw.lpum;
162 schib->pmcw.pam = s->pmcw.pam;
163 schib->pmcw.pom = s->pmcw.pom;
164
165 if (s->scsw.flags & SCSW_FLAGS_MASK_PNO) {
166 schib->scsw.flags |= SCSW_FLAGS_MASK_PNO;
167 }
168
169 return IOINST_CC_EXPECTED;
170}
171
172static int vfio_ccw_handle_clear(SubchDev *sch)
173{
174 S390CCWDevice *cdev = sch->driver_data;
175 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
176 struct ccw_cmd_region *region = vcdev->async_cmd_region;
177 int ret;
178
179 if (!vcdev->async_cmd_region) {
180
181 return -ENOSYS;
182 }
183
184 memset(region, 0, sizeof(*region));
185 region->command = VFIO_CCW_ASYNC_CMD_CSCH;
186
187again:
188 ret = pwrite(vcdev->vdev.fd, region,
189 vcdev->async_cmd_region_size, vcdev->async_cmd_region_offset);
190 if (ret != vcdev->async_cmd_region_size) {
191 if (errno == EAGAIN) {
192 goto again;
193 }
194 error_report("vfio-ccw: write cmd region failed with errno=%d", errno);
195 ret = errno ? -errno : -EFAULT;
196 } else {
197 ret = 0;
198 }
199 switch (ret) {
200 case 0:
201 case -ENODEV:
202 case -EACCES:
203 return 0;
204 case -EFAULT:
205 default:
206 sch_gen_unit_exception(sch);
207 css_inject_io_interrupt(sch);
208 return 0;
209 }
210}
211
212static int vfio_ccw_handle_halt(SubchDev *sch)
213{
214 S390CCWDevice *cdev = sch->driver_data;
215 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
216 struct ccw_cmd_region *region = vcdev->async_cmd_region;
217 int ret;
218
219 if (!vcdev->async_cmd_region) {
220
221 return -ENOSYS;
222 }
223
224 memset(region, 0, sizeof(*region));
225 region->command = VFIO_CCW_ASYNC_CMD_HSCH;
226
227again:
228 ret = pwrite(vcdev->vdev.fd, region,
229 vcdev->async_cmd_region_size, vcdev->async_cmd_region_offset);
230 if (ret != vcdev->async_cmd_region_size) {
231 if (errno == EAGAIN) {
232 goto again;
233 }
234 error_report("vfio-ccw: write cmd region failed with errno=%d", errno);
235 ret = errno ? -errno : -EFAULT;
236 } else {
237 ret = 0;
238 }
239 switch (ret) {
240 case 0:
241 case -EBUSY:
242 case -ENODEV:
243 case -EACCES:
244 return 0;
245 case -EFAULT:
246 default:
247 sch_gen_unit_exception(sch);
248 css_inject_io_interrupt(sch);
249 return 0;
250 }
251}
252
253static void vfio_ccw_reset(DeviceState *dev)
254{
255 CcwDevice *ccw_dev = DO_UPCAST(CcwDevice, parent_obj, dev);
256 S390CCWDevice *cdev = DO_UPCAST(S390CCWDevice, parent_obj, ccw_dev);
257 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
258
259 ioctl(vcdev->vdev.fd, VFIO_DEVICE_RESET);
260}
261
262static void vfio_ccw_crw_read(VFIOCCWDevice *vcdev)
263{
264 struct ccw_crw_region *region = vcdev->crw_region;
265 CRW crw;
266 int size;
267
268
269 do {
270 memset(region, 0, sizeof(*region));
271 size = pread(vcdev->vdev.fd, region, vcdev->crw_region_size,
272 vcdev->crw_region_offset);
273
274 if (size == -1) {
275 error_report("vfio-ccw: Read crw region failed with errno=%d",
276 errno);
277 break;
278 }
279
280 if (region->crw == 0) {
281
282 break;
283 }
284
285 memcpy(&crw, ®ion->crw, sizeof(CRW));
286
287 css_crw_add_to_queue(crw);
288 } while (1);
289}
290
291static void vfio_ccw_req_notifier_handler(void *opaque)
292{
293 VFIOCCWDevice *vcdev = opaque;
294 Error *err = NULL;
295
296 if (!event_notifier_test_and_clear(&vcdev->req_notifier)) {
297 return;
298 }
299
300 qdev_unplug(DEVICE(vcdev), &err);
301 if (err) {
302 warn_reportf_err(err, VFIO_MSG_PREFIX, vcdev->vdev.name);
303 }
304}
305
306static void vfio_ccw_crw_notifier_handler(void *opaque)
307{
308 VFIOCCWDevice *vcdev = opaque;
309
310 while (event_notifier_test_and_clear(&vcdev->crw_notifier)) {
311 vfio_ccw_crw_read(vcdev);
312 }
313}
314
315static void vfio_ccw_io_notifier_handler(void *opaque)
316{
317 VFIOCCWDevice *vcdev = opaque;
318 struct ccw_io_region *region = vcdev->io_region;
319 S390CCWDevice *cdev = S390_CCW_DEVICE(vcdev);
320 CcwDevice *ccw_dev = CCW_DEVICE(cdev);
321 SubchDev *sch = ccw_dev->sch;
322 SCHIB *schib = &sch->curr_status;
323 SCSW s;
324 IRB irb;
325 int size;
326
327 if (!event_notifier_test_and_clear(&vcdev->io_notifier)) {
328 return;
329 }
330
331 size = pread(vcdev->vdev.fd, region, vcdev->io_region_size,
332 vcdev->io_region_offset);
333 if (size == -1) {
334 switch (errno) {
335 case ENODEV:
336
337 schib->scsw.flags |= SCSW_FLAGS_MASK_CC;
338 schib->scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
339 schib->scsw.ctrl |= (SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND);
340 goto read_err;
341 case EFAULT:
342
343 schib->scsw.ctrl &= ~SCSW_ACTL_START_PEND;
344 schib->scsw.cstat = SCSW_CSTAT_DATA_CHECK;
345 schib->scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
346 schib->scsw.ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
347 SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
348 goto read_err;
349 default:
350
351 schib->scsw.ctrl &= ~SCSW_ACTL_START_PEND;
352 schib->scsw.cstat = SCSW_CSTAT_PROG_CHECK;
353 schib->scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
354 schib->scsw.ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
355 SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
356 goto read_err;
357 }
358 } else if (size != vcdev->io_region_size) {
359
360 schib->scsw.ctrl &= ~SCSW_ACTL_START_PEND;
361 schib->scsw.cstat = SCSW_CSTAT_CHN_CTRL_CHK;
362 schib->scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
363 schib->scsw.ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
364 SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
365 goto read_err;
366 }
367
368 memcpy(&irb, region->irb_area, sizeof(IRB));
369
370
371 s = schib->scsw;
372 copy_scsw_to_guest(&s, &irb.scsw);
373 schib->scsw = s;
374
375
376 if ((schib->scsw.dstat & SCSW_DSTAT_UNIT_CHECK) &&
377 (schib->pmcw.chars & PMCW_CHARS_MASK_CSENSE)) {
378 memcpy(sch->sense_data, irb.ecw, sizeof(irb.ecw));
379 }
380
381read_err:
382 css_inject_io_interrupt(sch);
383}
384
385static void vfio_ccw_register_irq_notifier(VFIOCCWDevice *vcdev,
386 unsigned int irq,
387 Error **errp)
388{
389 VFIODevice *vdev = &vcdev->vdev;
390 struct vfio_irq_info *irq_info;
391 size_t argsz;
392 int fd;
393 EventNotifier *notifier;
394 IOHandler *fd_read;
395
396 switch (irq) {
397 case VFIO_CCW_IO_IRQ_INDEX:
398 notifier = &vcdev->io_notifier;
399 fd_read = vfio_ccw_io_notifier_handler;
400 break;
401 case VFIO_CCW_CRW_IRQ_INDEX:
402 notifier = &vcdev->crw_notifier;
403 fd_read = vfio_ccw_crw_notifier_handler;
404 break;
405 case VFIO_CCW_REQ_IRQ_INDEX:
406 notifier = &vcdev->req_notifier;
407 fd_read = vfio_ccw_req_notifier_handler;
408 break;
409 default:
410 error_setg(errp, "vfio: Unsupported device irq(%d)", irq);
411 return;
412 }
413
414 if (vdev->num_irqs < irq + 1) {
415 error_setg(errp, "vfio: unexpected number of irqs %u",
416 vdev->num_irqs);
417 return;
418 }
419
420 argsz = sizeof(*irq_info);
421 irq_info = g_malloc0(argsz);
422 irq_info->index = irq;
423 irq_info->argsz = argsz;
424 if (ioctl(vdev->fd, VFIO_DEVICE_GET_IRQ_INFO,
425 irq_info) < 0 || irq_info->count < 1) {
426 error_setg_errno(errp, errno, "vfio: Error getting irq info");
427 goto out_free_info;
428 }
429
430 if (event_notifier_init(notifier, 0)) {
431 error_setg_errno(errp, errno,
432 "vfio: Unable to init event notifier for irq (%d)",
433 irq);
434 goto out_free_info;
435 }
436
437 fd = event_notifier_get_fd(notifier);
438 qemu_set_fd_handler(fd, fd_read, NULL, vcdev);
439
440 if (vfio_set_irq_signaling(vdev, irq, 0,
441 VFIO_IRQ_SET_ACTION_TRIGGER, fd, errp)) {
442 qemu_set_fd_handler(fd, NULL, NULL, vcdev);
443 event_notifier_cleanup(notifier);
444 }
445
446out_free_info:
447 g_free(irq_info);
448}
449
450static void vfio_ccw_unregister_irq_notifier(VFIOCCWDevice *vcdev,
451 unsigned int irq)
452{
453 Error *err = NULL;
454 EventNotifier *notifier;
455
456 switch (irq) {
457 case VFIO_CCW_IO_IRQ_INDEX:
458 notifier = &vcdev->io_notifier;
459 break;
460 case VFIO_CCW_CRW_IRQ_INDEX:
461 notifier = &vcdev->crw_notifier;
462 break;
463 case VFIO_CCW_REQ_IRQ_INDEX:
464 notifier = &vcdev->req_notifier;
465 break;
466 default:
467 error_report("vfio: Unsupported device irq(%d)", irq);
468 return;
469 }
470
471 if (vfio_set_irq_signaling(&vcdev->vdev, irq, 0,
472 VFIO_IRQ_SET_ACTION_TRIGGER, -1, &err)) {
473 error_reportf_err(err, VFIO_MSG_PREFIX, vcdev->vdev.name);
474 }
475
476 qemu_set_fd_handler(event_notifier_get_fd(notifier),
477 NULL, NULL, vcdev);
478 event_notifier_cleanup(notifier);
479}
480
481static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp)
482{
483 VFIODevice *vdev = &vcdev->vdev;
484 struct vfio_region_info *info;
485 int ret;
486
487
488 if (!(vdev->flags & VFIO_DEVICE_FLAGS_CCW)) {
489 error_setg(errp, "vfio: Um, this isn't a vfio-ccw device");
490 return;
491 }
492
493
494
495
496
497 if (vdev->num_regions < VFIO_CCW_CONFIG_REGION_INDEX + 1) {
498 error_setg(errp, "vfio: too few regions (%u), expected at least %u",
499 vdev->num_regions, VFIO_CCW_CONFIG_REGION_INDEX + 1);
500 return;
501 }
502
503 ret = vfio_get_region_info(vdev, VFIO_CCW_CONFIG_REGION_INDEX, &info);
504 if (ret) {
505 error_setg_errno(errp, -ret, "vfio: Error getting config info");
506 return;
507 }
508
509 vcdev->io_region_size = info->size;
510 if (sizeof(*vcdev->io_region) != vcdev->io_region_size) {
511 error_setg(errp, "vfio: Unexpected size of the I/O region");
512 goto out_err;
513 }
514
515 vcdev->io_region_offset = info->offset;
516 vcdev->io_region = g_malloc0(info->size);
517 g_free(info);
518
519
520 ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW,
521 VFIO_REGION_SUBTYPE_CCW_ASYNC_CMD, &info);
522 if (!ret) {
523 vcdev->async_cmd_region_size = info->size;
524 if (sizeof(*vcdev->async_cmd_region) != vcdev->async_cmd_region_size) {
525 error_setg(errp, "vfio: Unexpected size of the async cmd region");
526 goto out_err;
527 }
528 vcdev->async_cmd_region_offset = info->offset;
529 vcdev->async_cmd_region = g_malloc0(info->size);
530 g_free(info);
531 }
532
533 ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW,
534 VFIO_REGION_SUBTYPE_CCW_SCHIB, &info);
535 if (!ret) {
536 vcdev->schib_region_size = info->size;
537 if (sizeof(*vcdev->schib_region) != vcdev->schib_region_size) {
538 error_setg(errp, "vfio: Unexpected size of the schib region");
539 goto out_err;
540 }
541 vcdev->schib_region_offset = info->offset;
542 vcdev->schib_region = g_malloc(info->size);
543 g_free(info);
544 }
545
546 ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW,
547 VFIO_REGION_SUBTYPE_CCW_CRW, &info);
548
549 if (!ret) {
550 vcdev->crw_region_size = info->size;
551 if (sizeof(*vcdev->crw_region) != vcdev->crw_region_size) {
552 error_setg(errp, "vfio: Unexpected size of the CRW region");
553 goto out_err;
554 }
555 vcdev->crw_region_offset = info->offset;
556 vcdev->crw_region = g_malloc(info->size);
557 g_free(info);
558 }
559
560 return;
561
562out_err:
563 g_free(vcdev->crw_region);
564 g_free(vcdev->schib_region);
565 g_free(vcdev->async_cmd_region);
566 g_free(vcdev->io_region);
567 g_free(info);
568 return;
569}
570
571static void vfio_ccw_put_region(VFIOCCWDevice *vcdev)
572{
573 g_free(vcdev->crw_region);
574 g_free(vcdev->schib_region);
575 g_free(vcdev->async_cmd_region);
576 g_free(vcdev->io_region);
577}
578
579static void vfio_ccw_put_device(VFIOCCWDevice *vcdev)
580{
581 g_free(vcdev->vdev.name);
582 vfio_put_base_device(&vcdev->vdev);
583}
584
585static void vfio_ccw_get_device(VFIOGroup *group, VFIOCCWDevice *vcdev,
586 Error **errp)
587{
588 char *name = g_strdup_printf("%x.%x.%04x", vcdev->cdev.hostid.cssid,
589 vcdev->cdev.hostid.ssid,
590 vcdev->cdev.hostid.devid);
591 VFIODevice *vbasedev;
592
593 QLIST_FOREACH(vbasedev, &group->device_list, next) {
594 if (strcmp(vbasedev->name, name) == 0) {
595 error_setg(errp, "vfio: subchannel %s has already been attached",
596 name);
597 goto out_err;
598 }
599 }
600
601
602
603
604
605
606
607
608
609 vcdev->vdev.ram_block_discard_allowed = true;
610
611 if (vfio_get_device(group, vcdev->cdev.mdevid, &vcdev->vdev, errp)) {
612 goto out_err;
613 }
614
615 vcdev->vdev.ops = &vfio_ccw_ops;
616 vcdev->vdev.type = VFIO_DEVICE_TYPE_CCW;
617 vcdev->vdev.name = name;
618 vcdev->vdev.dev = &vcdev->cdev.parent_obj.parent_obj;
619
620 return;
621
622out_err:
623 g_free(name);
624}
625
626static VFIOGroup *vfio_ccw_get_group(S390CCWDevice *cdev, Error **errp)
627{
628 char *tmp, group_path[PATH_MAX];
629 ssize_t len;
630 int groupid;
631
632 tmp = g_strdup_printf("/sys/bus/css/devices/%x.%x.%04x/%s/iommu_group",
633 cdev->hostid.cssid, cdev->hostid.ssid,
634 cdev->hostid.devid, cdev->mdevid);
635 len = readlink(tmp, group_path, sizeof(group_path));
636 g_free(tmp);
637
638 if (len <= 0 || len >= sizeof(group_path)) {
639 error_setg(errp, "vfio: no iommu_group found");
640 return NULL;
641 }
642
643 group_path[len] = 0;
644
645 if (sscanf(basename(group_path), "%d", &groupid) != 1) {
646 error_setg(errp, "vfio: failed to read %s", group_path);
647 return NULL;
648 }
649
650 return vfio_get_group(groupid, &address_space_memory, errp);
651}
652
653static void vfio_ccw_realize(DeviceState *dev, Error **errp)
654{
655 VFIOGroup *group;
656 CcwDevice *ccw_dev = DO_UPCAST(CcwDevice, parent_obj, dev);
657 S390CCWDevice *cdev = DO_UPCAST(S390CCWDevice, parent_obj, ccw_dev);
658 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
659 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev);
660 Error *err = NULL;
661
662
663 if (cdc->realize) {
664 cdc->realize(cdev, vcdev->vdev.sysfsdev, &err);
665 if (err) {
666 goto out_err_propagate;
667 }
668 }
669
670 group = vfio_ccw_get_group(cdev, &err);
671 if (!group) {
672 goto out_group_err;
673 }
674
675 vfio_ccw_get_device(group, vcdev, &err);
676 if (err) {
677 goto out_device_err;
678 }
679
680 vfio_ccw_get_region(vcdev, &err);
681 if (err) {
682 goto out_region_err;
683 }
684
685 vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX, &err);
686 if (err) {
687 goto out_io_notifier_err;
688 }
689
690 if (vcdev->crw_region) {
691 vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX, &err);
692 if (err) {
693 goto out_crw_notifier_err;
694 }
695 }
696
697 vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_REQ_IRQ_INDEX, &err);
698 if (err) {
699 goto out_req_notifier_err;
700 }
701
702 return;
703
704out_req_notifier_err:
705 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX);
706out_crw_notifier_err:
707 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
708out_io_notifier_err:
709 vfio_ccw_put_region(vcdev);
710out_region_err:
711 vfio_ccw_put_device(vcdev);
712out_device_err:
713 vfio_put_group(group);
714out_group_err:
715 if (cdc->unrealize) {
716 cdc->unrealize(cdev);
717 }
718out_err_propagate:
719 error_propagate(errp, err);
720}
721
722static void vfio_ccw_unrealize(DeviceState *dev)
723{
724 CcwDevice *ccw_dev = DO_UPCAST(CcwDevice, parent_obj, dev);
725 S390CCWDevice *cdev = DO_UPCAST(S390CCWDevice, parent_obj, ccw_dev);
726 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
727 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev);
728 VFIOGroup *group = vcdev->vdev.group;
729
730 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_REQ_IRQ_INDEX);
731 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX);
732 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
733 vfio_ccw_put_region(vcdev);
734 vfio_ccw_put_device(vcdev);
735 vfio_put_group(group);
736
737 if (cdc->unrealize) {
738 cdc->unrealize(cdev);
739 }
740}
741
742static Property vfio_ccw_properties[] = {
743 DEFINE_PROP_STRING("sysfsdev", VFIOCCWDevice, vdev.sysfsdev),
744 DEFINE_PROP_BOOL("force-orb-pfch", VFIOCCWDevice, force_orb_pfch, false),
745 DEFINE_PROP_END_OF_LIST(),
746};
747
748static const VMStateDescription vfio_ccw_vmstate = {
749 .name = "vfio-ccw",
750 .unmigratable = 1,
751};
752
753static void vfio_ccw_class_init(ObjectClass *klass, void *data)
754{
755 DeviceClass *dc = DEVICE_CLASS(klass);
756 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_CLASS(klass);
757
758 device_class_set_props(dc, vfio_ccw_properties);
759 dc->vmsd = &vfio_ccw_vmstate;
760 dc->desc = "VFIO-based subchannel assignment";
761 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
762 dc->realize = vfio_ccw_realize;
763 dc->unrealize = vfio_ccw_unrealize;
764 dc->reset = vfio_ccw_reset;
765
766 cdc->handle_request = vfio_ccw_handle_request;
767 cdc->handle_halt = vfio_ccw_handle_halt;
768 cdc->handle_clear = vfio_ccw_handle_clear;
769 cdc->handle_store = vfio_ccw_handle_store;
770}
771
772static const TypeInfo vfio_ccw_info = {
773 .name = TYPE_VFIO_CCW,
774 .parent = TYPE_S390_CCW,
775 .instance_size = sizeof(VFIOCCWDevice),
776 .class_init = vfio_ccw_class_init,
777};
778
779static void register_vfio_ccw_type(void)
780{
781 type_register_static(&vfio_ccw_info);
782}
783
784type_init(register_vfio_ccw_type)
785
