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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/vfio/vfio.h"
24#include "hw/vfio/vfio-common.h"
25#include "hw/s390x/s390-ccw.h"
26#include "hw/s390x/vfio-ccw.h"
27#include "hw/qdev-properties.h"
28#include "hw/s390x/ccw-device.h"
29#include "exec/address-spaces.h"
30#include "qemu/error-report.h"
31#include "qemu/main-loop.h"
32#include "qemu/module.h"
33
34struct VFIOCCWDevice {
35 S390CCWDevice cdev;
36 VFIODevice vdev;
37 uint64_t io_region_size;
38 uint64_t io_region_offset;
39 struct ccw_io_region *io_region;
40 uint64_t async_cmd_region_size;
41 uint64_t async_cmd_region_offset;
42 struct ccw_cmd_region *async_cmd_region;
43 uint64_t schib_region_size;
44 uint64_t schib_region_offset;
45 struct ccw_schib_region *schib_region;
46 uint64_t crw_region_size;
47 uint64_t crw_region_offset;
48 struct ccw_crw_region *crw_region;
49 EventNotifier io_notifier;
50 EventNotifier crw_notifier;
51 EventNotifier req_notifier;
52 bool force_orb_pfch;
53 bool warned_orb_pfch;
54};
55
56static inline void warn_once_pfch(VFIOCCWDevice *vcdev, SubchDev *sch,
57 const char *msg)
58{
59 warn_report_once_cond(&vcdev->warned_orb_pfch,
60 "vfio-ccw (devno %x.%x.%04x): %s",
61 sch->cssid, sch->ssid, sch->devno, msg);
62}
63
64static void vfio_ccw_compute_needs_reset(VFIODevice *vdev)
65{
66 vdev->needs_reset = false;
67}
68
69
70
71
72
73struct VFIODeviceOps vfio_ccw_ops = {
74 .vfio_compute_needs_reset = vfio_ccw_compute_needs_reset,
75};
76
77static IOInstEnding vfio_ccw_handle_request(SubchDev *sch)
78{
79 S390CCWDevice *cdev = sch->driver_data;
80 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
81 struct ccw_io_region *region = vcdev->io_region;
82 int ret;
83
84 if (!(sch->orb.ctrl0 & ORB_CTRL0_MASK_PFCH) && vcdev->force_orb_pfch) {
85 sch->orb.ctrl0 |= ORB_CTRL0_MASK_PFCH;
86 warn_once_pfch(vcdev, sch, "PFCH flag forced");
87 }
88
89 QEMU_BUILD_BUG_ON(sizeof(region->orb_area) != sizeof(ORB));
90 QEMU_BUILD_BUG_ON(sizeof(region->scsw_area) != sizeof(SCSW));
91 QEMU_BUILD_BUG_ON(sizeof(region->irb_area) != sizeof(IRB));
92
93 memset(region, 0, sizeof(*region));
94
95 memcpy(region->orb_area, &sch->orb, sizeof(ORB));
96 memcpy(region->scsw_area, &sch->curr_status.scsw, sizeof(SCSW));
97
98again:
99 ret = pwrite(vcdev->vdev.fd, region,
100 vcdev->io_region_size, vcdev->io_region_offset);
101 if (ret != vcdev->io_region_size) {
102 if (errno == EAGAIN) {
103 goto again;
104 }
105 error_report("vfio-ccw: write I/O region failed with errno=%d", errno);
106 ret = errno ? -errno : -EFAULT;
107 } else {
108 ret = 0;
109 }
110 switch (ret) {
111 case 0:
112 return IOINST_CC_EXPECTED;
113 case -EBUSY:
114 return IOINST_CC_BUSY;
115 case -ENODEV:
116 case -EACCES:
117 return IOINST_CC_NOT_OPERATIONAL;
118 case -EFAULT:
119 default:
120 sch_gen_unit_exception(sch);
121 css_inject_io_interrupt(sch);
122 return IOINST_CC_EXPECTED;
123 }
124}
125
126static IOInstEnding vfio_ccw_handle_store(SubchDev *sch)
127{
128 S390CCWDevice *cdev = sch->driver_data;
129 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
130 SCHIB *schib = &sch->curr_status;
131 struct ccw_schib_region *region = vcdev->schib_region;
132 SCHIB *s;
133 int ret;
134
135
136 if (!region) {
137 return IOINST_CC_EXPECTED;
138 }
139
140 memset(region, 0, sizeof(*region));
141 ret = pread(vcdev->vdev.fd, region, vcdev->schib_region_size,
142 vcdev->schib_region_offset);
143
144 if (ret == -1) {
145
146
147
148
149
150 error_report("vfio-ccw: store region read failed with errno=%d", errno);
151 return IOINST_CC_EXPECTED;
152 }
153
154
155
156
157
158 s = (SCHIB *)region->schib_area;
159 schib->pmcw.pnom = s->pmcw.pnom;
160 schib->pmcw.lpum = s->pmcw.lpum;
161 schib->pmcw.pam = s->pmcw.pam;
162 schib->pmcw.pom = s->pmcw.pom;
163
164 if (s->scsw.flags & SCSW_FLAGS_MASK_PNO) {
165 schib->scsw.flags |= SCSW_FLAGS_MASK_PNO;
166 }
167
168 return IOINST_CC_EXPECTED;
169}
170
171static int vfio_ccw_handle_clear(SubchDev *sch)
172{
173 S390CCWDevice *cdev = sch->driver_data;
174 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
175 struct ccw_cmd_region *region = vcdev->async_cmd_region;
176 int ret;
177
178 if (!vcdev->async_cmd_region) {
179
180 return -ENOSYS;
181 }
182
183 memset(region, 0, sizeof(*region));
184 region->command = VFIO_CCW_ASYNC_CMD_CSCH;
185
186again:
187 ret = pwrite(vcdev->vdev.fd, region,
188 vcdev->async_cmd_region_size, vcdev->async_cmd_region_offset);
189 if (ret != vcdev->async_cmd_region_size) {
190 if (errno == EAGAIN) {
191 goto again;
192 }
193 error_report("vfio-ccw: write cmd region failed with errno=%d", errno);
194 ret = errno ? -errno : -EFAULT;
195 } else {
196 ret = 0;
197 }
198 switch (ret) {
199 case 0:
200 case -ENODEV:
201 case -EACCES:
202 return 0;
203 case -EFAULT:
204 default:
205 sch_gen_unit_exception(sch);
206 css_inject_io_interrupt(sch);
207 return 0;
208 }
209}
210
211static int vfio_ccw_handle_halt(SubchDev *sch)
212{
213 S390CCWDevice *cdev = sch->driver_data;
214 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
215 struct ccw_cmd_region *region = vcdev->async_cmd_region;
216 int ret;
217
218 if (!vcdev->async_cmd_region) {
219
220 return -ENOSYS;
221 }
222
223 memset(region, 0, sizeof(*region));
224 region->command = VFIO_CCW_ASYNC_CMD_HSCH;
225
226again:
227 ret = pwrite(vcdev->vdev.fd, region,
228 vcdev->async_cmd_region_size, vcdev->async_cmd_region_offset);
229 if (ret != vcdev->async_cmd_region_size) {
230 if (errno == EAGAIN) {
231 goto again;
232 }
233 error_report("vfio-ccw: write cmd region failed with errno=%d", errno);
234 ret = errno ? -errno : -EFAULT;
235 } else {
236 ret = 0;
237 }
238 switch (ret) {
239 case 0:
240 case -EBUSY:
241 case -ENODEV:
242 case -EACCES:
243 return 0;
244 case -EFAULT:
245 default:
246 sch_gen_unit_exception(sch);
247 css_inject_io_interrupt(sch);
248 return 0;
249 }
250}
251
252static void vfio_ccw_reset(DeviceState *dev)
253{
254 CcwDevice *ccw_dev = DO_UPCAST(CcwDevice, parent_obj, dev);
255 S390CCWDevice *cdev = DO_UPCAST(S390CCWDevice, parent_obj, ccw_dev);
256 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
257
258 ioctl(vcdev->vdev.fd, VFIO_DEVICE_RESET);
259}
260
261static void vfio_ccw_crw_read(VFIOCCWDevice *vcdev)
262{
263 struct ccw_crw_region *region = vcdev->crw_region;
264 CRW crw;
265 int size;
266
267
268 do {
269 memset(region, 0, sizeof(*region));
270 size = pread(vcdev->vdev.fd, region, vcdev->crw_region_size,
271 vcdev->crw_region_offset);
272
273 if (size == -1) {
274 error_report("vfio-ccw: Read crw region failed with errno=%d",
275 errno);
276 break;
277 }
278
279 if (region->crw == 0) {
280
281 break;
282 }
283
284 memcpy(&crw, ®ion->crw, sizeof(CRW));
285
286 css_crw_add_to_queue(crw);
287 } while (1);
288}
289
290static void vfio_ccw_req_notifier_handler(void *opaque)
291{
292 VFIOCCWDevice *vcdev = opaque;
293 Error *err = NULL;
294
295 if (!event_notifier_test_and_clear(&vcdev->req_notifier)) {
296 return;
297 }
298
299 qdev_unplug(DEVICE(vcdev), &err);
300 if (err) {
301 warn_reportf_err(err, VFIO_MSG_PREFIX, vcdev->vdev.name);
302 }
303}
304
305static void vfio_ccw_crw_notifier_handler(void *opaque)
306{
307 VFIOCCWDevice *vcdev = opaque;
308
309 while (event_notifier_test_and_clear(&vcdev->crw_notifier)) {
310 vfio_ccw_crw_read(vcdev);
311 }
312}
313
314static void vfio_ccw_io_notifier_handler(void *opaque)
315{
316 VFIOCCWDevice *vcdev = opaque;
317 struct ccw_io_region *region = vcdev->io_region;
318 S390CCWDevice *cdev = S390_CCW_DEVICE(vcdev);
319 CcwDevice *ccw_dev = CCW_DEVICE(cdev);
320 SubchDev *sch = ccw_dev->sch;
321 SCHIB *schib = &sch->curr_status;
322 SCSW s;
323 IRB irb;
324 ESW esw;
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 copy_esw_to_guest(&esw, &irb.esw);
376 sch->esw = esw;
377
378
379 if ((schib->scsw.dstat & SCSW_DSTAT_UNIT_CHECK) &&
380 (schib->pmcw.chars & PMCW_CHARS_MASK_CSENSE)) {
381 memcpy(sch->sense_data, irb.ecw, sizeof(irb.ecw));
382 }
383
384read_err:
385 css_inject_io_interrupt(sch);
386}
387
388static void vfio_ccw_register_irq_notifier(VFIOCCWDevice *vcdev,
389 unsigned int irq,
390 Error **errp)
391{
392 VFIODevice *vdev = &vcdev->vdev;
393 struct vfio_irq_info *irq_info;
394 size_t argsz;
395 int fd;
396 EventNotifier *notifier;
397 IOHandler *fd_read;
398
399 switch (irq) {
400 case VFIO_CCW_IO_IRQ_INDEX:
401 notifier = &vcdev->io_notifier;
402 fd_read = vfio_ccw_io_notifier_handler;
403 break;
404 case VFIO_CCW_CRW_IRQ_INDEX:
405 notifier = &vcdev->crw_notifier;
406 fd_read = vfio_ccw_crw_notifier_handler;
407 break;
408 case VFIO_CCW_REQ_IRQ_INDEX:
409 notifier = &vcdev->req_notifier;
410 fd_read = vfio_ccw_req_notifier_handler;
411 break;
412 default:
413 error_setg(errp, "vfio: Unsupported device irq(%d)", irq);
414 return;
415 }
416
417 if (vdev->num_irqs < irq + 1) {
418 error_setg(errp, "vfio: IRQ %u not available (number of irqs %u)",
419 irq, vdev->num_irqs);
420 return;
421 }
422
423 argsz = sizeof(*irq_info);
424 irq_info = g_malloc0(argsz);
425 irq_info->index = irq;
426 irq_info->argsz = argsz;
427 if (ioctl(vdev->fd, VFIO_DEVICE_GET_IRQ_INFO,
428 irq_info) < 0 || irq_info->count < 1) {
429 error_setg_errno(errp, errno, "vfio: Error getting irq info");
430 goto out_free_info;
431 }
432
433 if (event_notifier_init(notifier, 0)) {
434 error_setg_errno(errp, errno,
435 "vfio: Unable to init event notifier for irq (%d)",
436 irq);
437 goto out_free_info;
438 }
439
440 fd = event_notifier_get_fd(notifier);
441 qemu_set_fd_handler(fd, fd_read, NULL, vcdev);
442
443 if (vfio_set_irq_signaling(vdev, irq, 0,
444 VFIO_IRQ_SET_ACTION_TRIGGER, fd, errp)) {
445 qemu_set_fd_handler(fd, NULL, NULL, vcdev);
446 event_notifier_cleanup(notifier);
447 }
448
449out_free_info:
450 g_free(irq_info);
451}
452
453static void vfio_ccw_unregister_irq_notifier(VFIOCCWDevice *vcdev,
454 unsigned int irq)
455{
456 Error *err = NULL;
457 EventNotifier *notifier;
458
459 switch (irq) {
460 case VFIO_CCW_IO_IRQ_INDEX:
461 notifier = &vcdev->io_notifier;
462 break;
463 case VFIO_CCW_CRW_IRQ_INDEX:
464 notifier = &vcdev->crw_notifier;
465 break;
466 case VFIO_CCW_REQ_IRQ_INDEX:
467 notifier = &vcdev->req_notifier;
468 break;
469 default:
470 error_report("vfio: Unsupported device irq(%d)", irq);
471 return;
472 }
473
474 if (vfio_set_irq_signaling(&vcdev->vdev, irq, 0,
475 VFIO_IRQ_SET_ACTION_TRIGGER, -1, &err)) {
476 warn_reportf_err(err, VFIO_MSG_PREFIX, vcdev->vdev.name);
477 }
478
479 qemu_set_fd_handler(event_notifier_get_fd(notifier),
480 NULL, NULL, vcdev);
481 event_notifier_cleanup(notifier);
482}
483
484static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp)
485{
486 VFIODevice *vdev = &vcdev->vdev;
487 struct vfio_region_info *info;
488 int ret;
489
490
491 if (!(vdev->flags & VFIO_DEVICE_FLAGS_CCW)) {
492 error_setg(errp, "vfio: Um, this isn't a vfio-ccw device");
493 return;
494 }
495
496
497
498
499
500 if (vdev->num_regions < VFIO_CCW_CONFIG_REGION_INDEX + 1) {
501 error_setg(errp, "vfio: too few regions (%u), expected at least %u",
502 vdev->num_regions, VFIO_CCW_CONFIG_REGION_INDEX + 1);
503 return;
504 }
505
506 ret = vfio_get_region_info(vdev, VFIO_CCW_CONFIG_REGION_INDEX, &info);
507 if (ret) {
508 error_setg_errno(errp, -ret, "vfio: Error getting config info");
509 return;
510 }
511
512 vcdev->io_region_size = info->size;
513 if (sizeof(*vcdev->io_region) != vcdev->io_region_size) {
514 error_setg(errp, "vfio: Unexpected size of the I/O region");
515 goto out_err;
516 }
517
518 vcdev->io_region_offset = info->offset;
519 vcdev->io_region = g_malloc0(info->size);
520 g_free(info);
521
522
523 ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW,
524 VFIO_REGION_SUBTYPE_CCW_ASYNC_CMD, &info);
525 if (!ret) {
526 vcdev->async_cmd_region_size = info->size;
527 if (sizeof(*vcdev->async_cmd_region) != vcdev->async_cmd_region_size) {
528 error_setg(errp, "vfio: Unexpected size of the async cmd region");
529 goto out_err;
530 }
531 vcdev->async_cmd_region_offset = info->offset;
532 vcdev->async_cmd_region = g_malloc0(info->size);
533 g_free(info);
534 }
535
536 ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW,
537 VFIO_REGION_SUBTYPE_CCW_SCHIB, &info);
538 if (!ret) {
539 vcdev->schib_region_size = info->size;
540 if (sizeof(*vcdev->schib_region) != vcdev->schib_region_size) {
541 error_setg(errp, "vfio: Unexpected size of the schib region");
542 goto out_err;
543 }
544 vcdev->schib_region_offset = info->offset;
545 vcdev->schib_region = g_malloc(info->size);
546 g_free(info);
547 }
548
549 ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW,
550 VFIO_REGION_SUBTYPE_CCW_CRW, &info);
551
552 if (!ret) {
553 vcdev->crw_region_size = info->size;
554 if (sizeof(*vcdev->crw_region) != vcdev->crw_region_size) {
555 error_setg(errp, "vfio: Unexpected size of the CRW region");
556 goto out_err;
557 }
558 vcdev->crw_region_offset = info->offset;
559 vcdev->crw_region = g_malloc(info->size);
560 g_free(info);
561 }
562
563 return;
564
565out_err:
566 g_free(vcdev->crw_region);
567 g_free(vcdev->schib_region);
568 g_free(vcdev->async_cmd_region);
569 g_free(vcdev->io_region);
570 g_free(info);
571 return;
572}
573
574static void vfio_ccw_put_region(VFIOCCWDevice *vcdev)
575{
576 g_free(vcdev->crw_region);
577 g_free(vcdev->schib_region);
578 g_free(vcdev->async_cmd_region);
579 g_free(vcdev->io_region);
580}
581
582static void vfio_ccw_put_device(VFIOCCWDevice *vcdev)
583{
584 g_free(vcdev->vdev.name);
585 vfio_put_base_device(&vcdev->vdev);
586}
587
588static void vfio_ccw_get_device(VFIOGroup *group, VFIOCCWDevice *vcdev,
589 Error **errp)
590{
591 char *name = g_strdup_printf("%x.%x.%04x", vcdev->cdev.hostid.cssid,
592 vcdev->cdev.hostid.ssid,
593 vcdev->cdev.hostid.devid);
594 VFIODevice *vbasedev;
595
596 QLIST_FOREACH(vbasedev, &group->device_list, next) {
597 if (strcmp(vbasedev->name, name) == 0) {
598 error_setg(errp, "vfio: subchannel %s has already been attached",
599 name);
600 goto out_err;
601 }
602 }
603
604
605
606
607
608
609
610
611
612 vcdev->vdev.ram_block_discard_allowed = true;
613
614 if (vfio_get_device(group, vcdev->cdev.mdevid, &vcdev->vdev, errp)) {
615 goto out_err;
616 }
617
618 vcdev->vdev.ops = &vfio_ccw_ops;
619 vcdev->vdev.type = VFIO_DEVICE_TYPE_CCW;
620 vcdev->vdev.name = name;
621 vcdev->vdev.dev = &vcdev->cdev.parent_obj.parent_obj;
622
623 return;
624
625out_err:
626 g_free(name);
627}
628
629static VFIOGroup *vfio_ccw_get_group(S390CCWDevice *cdev, Error **errp)
630{
631 char *tmp, group_path[PATH_MAX];
632 ssize_t len;
633 int groupid;
634
635 tmp = g_strdup_printf("/sys/bus/css/devices/%x.%x.%04x/%s/iommu_group",
636 cdev->hostid.cssid, cdev->hostid.ssid,
637 cdev->hostid.devid, cdev->mdevid);
638 len = readlink(tmp, group_path, sizeof(group_path));
639 g_free(tmp);
640
641 if (len <= 0 || len >= sizeof(group_path)) {
642 error_setg(errp, "vfio: no iommu_group found");
643 return NULL;
644 }
645
646 group_path[len] = 0;
647
648 if (sscanf(basename(group_path), "%d", &groupid) != 1) {
649 error_setg(errp, "vfio: failed to read %s", group_path);
650 return NULL;
651 }
652
653 return vfio_get_group(groupid, &address_space_memory, errp);
654}
655
656static void vfio_ccw_realize(DeviceState *dev, Error **errp)
657{
658 VFIOGroup *group;
659 CcwDevice *ccw_dev = DO_UPCAST(CcwDevice, parent_obj, dev);
660 S390CCWDevice *cdev = DO_UPCAST(S390CCWDevice, parent_obj, ccw_dev);
661 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
662 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev);
663 Error *err = NULL;
664
665
666 if (cdc->realize) {
667 cdc->realize(cdev, vcdev->vdev.sysfsdev, &err);
668 if (err) {
669 goto out_err_propagate;
670 }
671 }
672
673 group = vfio_ccw_get_group(cdev, &err);
674 if (!group) {
675 goto out_group_err;
676 }
677
678 vfio_ccw_get_device(group, vcdev, &err);
679 if (err) {
680 goto out_device_err;
681 }
682
683 vfio_ccw_get_region(vcdev, &err);
684 if (err) {
685 goto out_region_err;
686 }
687
688 vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX, &err);
689 if (err) {
690 goto out_io_notifier_err;
691 }
692
693 if (vcdev->crw_region) {
694 vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX, &err);
695 if (err) {
696 goto out_irq_notifier_err;
697 }
698 }
699
700 vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_REQ_IRQ_INDEX, &err);
701 if (err) {
702
703
704
705
706 error_report_err(err);
707 }
708
709 return;
710
711out_irq_notifier_err:
712 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_REQ_IRQ_INDEX);
713 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX);
714 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
715out_io_notifier_err:
716 vfio_ccw_put_region(vcdev);
717out_region_err:
718 vfio_ccw_put_device(vcdev);
719out_device_err:
720 vfio_put_group(group);
721out_group_err:
722 if (cdc->unrealize) {
723 cdc->unrealize(cdev);
724 }
725out_err_propagate:
726 error_propagate(errp, err);
727}
728
729static void vfio_ccw_unrealize(DeviceState *dev)
730{
731 CcwDevice *ccw_dev = DO_UPCAST(CcwDevice, parent_obj, dev);
732 S390CCWDevice *cdev = DO_UPCAST(S390CCWDevice, parent_obj, ccw_dev);
733 VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
734 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev);
735 VFIOGroup *group = vcdev->vdev.group;
736
737 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_REQ_IRQ_INDEX);
738 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX);
739 vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
740 vfio_ccw_put_region(vcdev);
741 vfio_ccw_put_device(vcdev);
742 vfio_put_group(group);
743
744 if (cdc->unrealize) {
745 cdc->unrealize(cdev);
746 }
747}
748
749static Property vfio_ccw_properties[] = {
750 DEFINE_PROP_STRING("sysfsdev", VFIOCCWDevice, vdev.sysfsdev),
751 DEFINE_PROP_BOOL("force-orb-pfch", VFIOCCWDevice, force_orb_pfch, false),
752 DEFINE_PROP_END_OF_LIST(),
753};
754
755static const VMStateDescription vfio_ccw_vmstate = {
756 .name = "vfio-ccw",
757 .unmigratable = 1,
758};
759
760static void vfio_ccw_class_init(ObjectClass *klass, void *data)
761{
762 DeviceClass *dc = DEVICE_CLASS(klass);
763 S390CCWDeviceClass *cdc = S390_CCW_DEVICE_CLASS(klass);
764
765 device_class_set_props(dc, vfio_ccw_properties);
766 dc->vmsd = &vfio_ccw_vmstate;
767 dc->desc = "VFIO-based subchannel assignment";
768 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
769 dc->realize = vfio_ccw_realize;
770 dc->unrealize = vfio_ccw_unrealize;
771 dc->reset = vfio_ccw_reset;
772
773 cdc->handle_request = vfio_ccw_handle_request;
774 cdc->handle_halt = vfio_ccw_handle_halt;
775 cdc->handle_clear = vfio_ccw_handle_clear;
776 cdc->handle_store = vfio_ccw_handle_store;
777}
778
779static const TypeInfo vfio_ccw_info = {
780 .name = TYPE_VFIO_CCW,
781 .parent = TYPE_S390_CCW,
782 .instance_size = sizeof(VFIOCCWDevice),
783 .class_init = vfio_ccw_class_init,
784};
785
786static void register_vfio_ccw_type(void)
787{
788 type_register_static(&vfio_ccw_info);
789}
790
791type_init(register_vfio_ccw_type)
792
