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24
25#include <linux/delay.h>
26#include <linux/interrupt.h>
27#include <linux/irq.h>
28#include <linux/module.h>
29#include <linux/pci.h>
30#include <asm/eeh.h>
31#include <asm/eeh_event.h>
32#include <asm/ppc-pci.h>
33#include <asm/pci-bridge.h>
34#include <asm/prom.h>
35#include <asm/rtas.h>
36
37struct eeh_rmv_data {
38 struct list_head edev_list;
39 int removed;
40};
41
42
43
44
45
46
47
48
49static inline const char *eeh_pcid_name(struct pci_dev *pdev)
50{
51 if (pdev && pdev->dev.driver)
52 return pdev->dev.driver->name;
53 return "";
54}
55
56
57
58
59
60
61
62
63
64
65static inline struct pci_driver *eeh_pcid_get(struct pci_dev *pdev)
66{
67 if (!pdev || !pdev->driver)
68 return NULL;
69
70 if (!try_module_get(pdev->driver->driver.owner))
71 return NULL;
72
73 return pdev->driver;
74}
75
76
77
78
79
80
81
82
83static inline void eeh_pcid_put(struct pci_dev *pdev)
84{
85 if (!pdev || !pdev->driver)
86 return;
87
88 module_put(pdev->driver->driver.owner);
89}
90
91
92
93
94
95
96
97
98
99
100
101static void eeh_disable_irq(struct pci_dev *dev)
102{
103 struct eeh_dev *edev = pci_dev_to_eeh_dev(dev);
104
105
106
107
108
109 if (dev->msi_enabled || dev->msix_enabled)
110 return;
111
112 if (!irq_has_action(dev->irq))
113 return;
114
115 edev->mode |= EEH_DEV_IRQ_DISABLED;
116 disable_irq_nosync(dev->irq);
117}
118
119
120
121
122
123
124
125
126static void eeh_enable_irq(struct pci_dev *dev)
127{
128 struct eeh_dev *edev = pci_dev_to_eeh_dev(dev);
129
130 if ((edev->mode) & EEH_DEV_IRQ_DISABLED) {
131 edev->mode &= ~EEH_DEV_IRQ_DISABLED;
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152 if (irqd_irq_disabled(irq_get_irq_data(dev->irq)))
153 enable_irq(dev->irq);
154 }
155}
156
157static bool eeh_dev_removed(struct eeh_dev *edev)
158{
159
160 if (!edev || (edev->mode & EEH_DEV_REMOVED))
161 return true;
162
163 return false;
164}
165
166static void *eeh_dev_save_state(void *data, void *userdata)
167{
168 struct eeh_dev *edev = data;
169 struct pci_dev *pdev;
170
171 if (!edev)
172 return NULL;
173
174
175
176
177
178
179
180
181 if (edev->pe && (edev->pe->state & EEH_PE_CFG_RESTRICTED))
182 return NULL;
183
184 pdev = eeh_dev_to_pci_dev(edev);
185 if (!pdev)
186 return NULL;
187
188 pci_save_state(pdev);
189 return NULL;
190}
191
192
193
194
195
196
197
198
199
200
201static void *eeh_report_error(void *data, void *userdata)
202{
203 struct eeh_dev *edev = (struct eeh_dev *)data;
204 struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
205 enum pci_ers_result rc, *res = userdata;
206 struct pci_driver *driver;
207
208 if (!dev || eeh_dev_removed(edev) || eeh_pe_passed(edev->pe))
209 return NULL;
210
211 device_lock(&dev->dev);
212 dev->error_state = pci_channel_io_frozen;
213
214 driver = eeh_pcid_get(dev);
215 if (!driver) goto out_no_dev;
216
217 eeh_disable_irq(dev);
218
219 if (!driver->err_handler ||
220 !driver->err_handler->error_detected)
221 goto out;
222
223 rc = driver->err_handler->error_detected(dev, pci_channel_io_frozen);
224
225
226 if (rc == PCI_ERS_RESULT_NEED_RESET) *res = rc;
227 if (*res == PCI_ERS_RESULT_NONE) *res = rc;
228
229 edev->in_error = true;
230 pci_uevent_ers(dev, PCI_ERS_RESULT_NONE);
231
232out:
233 eeh_pcid_put(dev);
234out_no_dev:
235 device_unlock(&dev->dev);
236 return NULL;
237}
238
239
240
241
242
243
244
245
246
247
248static void *eeh_report_mmio_enabled(void *data, void *userdata)
249{
250 struct eeh_dev *edev = (struct eeh_dev *)data;
251 struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
252 enum pci_ers_result rc, *res = userdata;
253 struct pci_driver *driver;
254
255 if (!dev || eeh_dev_removed(edev) || eeh_pe_passed(edev->pe))
256 return NULL;
257
258 device_lock(&dev->dev);
259 driver = eeh_pcid_get(dev);
260 if (!driver) goto out_no_dev;
261
262 if (!driver->err_handler ||
263 !driver->err_handler->mmio_enabled ||
264 (edev->mode & EEH_DEV_NO_HANDLER))
265 goto out;
266
267 rc = driver->err_handler->mmio_enabled(dev);
268
269
270 if (rc == PCI_ERS_RESULT_NEED_RESET) *res = rc;
271 if (*res == PCI_ERS_RESULT_NONE) *res = rc;
272
273out:
274 eeh_pcid_put(dev);
275out_no_dev:
276 device_unlock(&dev->dev);
277 return NULL;
278}
279
280
281
282
283
284
285
286
287
288
289
290static void *eeh_report_reset(void *data, void *userdata)
291{
292 struct eeh_dev *edev = (struct eeh_dev *)data;
293 struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
294 enum pci_ers_result rc, *res = userdata;
295 struct pci_driver *driver;
296
297 if (!dev || eeh_dev_removed(edev) || eeh_pe_passed(edev->pe))
298 return NULL;
299
300 device_lock(&dev->dev);
301 dev->error_state = pci_channel_io_normal;
302
303 driver = eeh_pcid_get(dev);
304 if (!driver) goto out_no_dev;
305
306 eeh_enable_irq(dev);
307
308 if (!driver->err_handler ||
309 !driver->err_handler->slot_reset ||
310 (edev->mode & EEH_DEV_NO_HANDLER) ||
311 (!edev->in_error))
312 goto out;
313
314 rc = driver->err_handler->slot_reset(dev);
315 if ((*res == PCI_ERS_RESULT_NONE) ||
316 (*res == PCI_ERS_RESULT_RECOVERED)) *res = rc;
317 if (*res == PCI_ERS_RESULT_DISCONNECT &&
318 rc == PCI_ERS_RESULT_NEED_RESET) *res = rc;
319
320out:
321 eeh_pcid_put(dev);
322out_no_dev:
323 device_unlock(&dev->dev);
324 return NULL;
325}
326
327static void *eeh_dev_restore_state(void *data, void *userdata)
328{
329 struct eeh_dev *edev = data;
330 struct pci_dev *pdev;
331
332 if (!edev)
333 return NULL;
334
335
336
337
338
339
340
341 if (edev->pe && (edev->pe->state & EEH_PE_CFG_RESTRICTED)) {
342 if (list_is_last(&edev->list, &edev->pe->edevs))
343 eeh_pe_restore_bars(edev->pe);
344
345 return NULL;
346 }
347
348 pdev = eeh_dev_to_pci_dev(edev);
349 if (!pdev)
350 return NULL;
351
352 pci_restore_state(pdev);
353 return NULL;
354}
355
356
357
358
359
360
361
362
363
364
365static void *eeh_report_resume(void *data, void *userdata)
366{
367 struct eeh_dev *edev = (struct eeh_dev *)data;
368 struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
369 bool was_in_error;
370 struct pci_driver *driver;
371
372 if (!dev || eeh_dev_removed(edev) || eeh_pe_passed(edev->pe))
373 return NULL;
374
375 device_lock(&dev->dev);
376 dev->error_state = pci_channel_io_normal;
377
378 driver = eeh_pcid_get(dev);
379 if (!driver) goto out_no_dev;
380
381 was_in_error = edev->in_error;
382 edev->in_error = false;
383 eeh_enable_irq(dev);
384
385 if (!driver->err_handler ||
386 !driver->err_handler->resume ||
387 (edev->mode & EEH_DEV_NO_HANDLER) || !was_in_error) {
388 edev->mode &= ~EEH_DEV_NO_HANDLER;
389 goto out;
390 }
391
392 driver->err_handler->resume(dev);
393
394 pci_uevent_ers(dev, PCI_ERS_RESULT_RECOVERED);
395out:
396 eeh_pcid_put(dev);
397#ifdef CONFIG_PCI_IOV
398 if (eeh_ops->notify_resume && eeh_dev_to_pdn(edev))
399 eeh_ops->notify_resume(eeh_dev_to_pdn(edev));
400#endif
401out_no_dev:
402 device_unlock(&dev->dev);
403 return NULL;
404}
405
406
407
408
409
410
411
412
413
414static void *eeh_report_failure(void *data, void *userdata)
415{
416 struct eeh_dev *edev = (struct eeh_dev *)data;
417 struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
418 struct pci_driver *driver;
419
420 if (!dev || eeh_dev_removed(edev) || eeh_pe_passed(edev->pe))
421 return NULL;
422
423 device_lock(&dev->dev);
424 dev->error_state = pci_channel_io_perm_failure;
425
426 driver = eeh_pcid_get(dev);
427 if (!driver) goto out_no_dev;
428
429 eeh_disable_irq(dev);
430
431 if (!driver->err_handler ||
432 !driver->err_handler->error_detected)
433 goto out;
434
435 driver->err_handler->error_detected(dev, pci_channel_io_perm_failure);
436
437 pci_uevent_ers(dev, PCI_ERS_RESULT_DISCONNECT);
438out:
439 eeh_pcid_put(dev);
440out_no_dev:
441 device_unlock(&dev->dev);
442 return NULL;
443}
444
445static void *eeh_add_virt_device(void *data, void *userdata)
446{
447 struct pci_driver *driver;
448 struct eeh_dev *edev = (struct eeh_dev *)data;
449 struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
450 struct pci_dn *pdn = eeh_dev_to_pdn(edev);
451
452 if (!(edev->physfn)) {
453 pr_warn("%s: EEH dev %04x:%02x:%02x.%01x not for VF\n",
454 __func__, pdn->phb->global_number, pdn->busno,
455 PCI_SLOT(pdn->devfn), PCI_FUNC(pdn->devfn));
456 return NULL;
457 }
458
459 driver = eeh_pcid_get(dev);
460 if (driver) {
461 eeh_pcid_put(dev);
462 if (driver->err_handler)
463 return NULL;
464 }
465
466#ifdef CONFIG_PCI_IOV
467 pci_iov_add_virtfn(edev->physfn, pdn->vf_index);
468#endif
469 return NULL;
470}
471
472static void *eeh_rmv_device(void *data, void *userdata)
473{
474 struct pci_driver *driver;
475 struct eeh_dev *edev = (struct eeh_dev *)data;
476 struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
477 struct eeh_rmv_data *rmv_data = (struct eeh_rmv_data *)userdata;
478 int *removed = rmv_data ? &rmv_data->removed : NULL;
479
480
481
482
483
484
485
486
487 if (!dev || (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE))
488 return NULL;
489
490
491
492
493
494
495
496
497 if (eeh_dev_removed(edev))
498 return NULL;
499
500 driver = eeh_pcid_get(dev);
501 if (driver) {
502 eeh_pcid_put(dev);
503 if (removed &&
504 eeh_pe_passed(edev->pe))
505 return NULL;
506 if (removed &&
507 driver->err_handler &&
508 driver->err_handler->error_detected &&
509 driver->err_handler->slot_reset)
510 return NULL;
511 }
512
513
514 pr_debug("EEH: Removing %s without EEH sensitive driver\n",
515 pci_name(dev));
516 edev->bus = dev->bus;
517 edev->mode |= EEH_DEV_DISCONNECTED;
518 if (removed)
519 (*removed)++;
520
521 if (edev->physfn) {
522#ifdef CONFIG_PCI_IOV
523 struct pci_dn *pdn = eeh_dev_to_pdn(edev);
524
525 pci_iov_remove_virtfn(edev->physfn, pdn->vf_index);
526 edev->pdev = NULL;
527
528
529
530
531
532 pdn->pe_number = IODA_INVALID_PE;
533#endif
534 if (rmv_data)
535 list_add(&edev->rmv_list, &rmv_data->edev_list);
536 } else {
537 pci_lock_rescan_remove();
538 pci_stop_and_remove_bus_device(dev);
539 pci_unlock_rescan_remove();
540 }
541
542 return NULL;
543}
544
545static void *eeh_pe_detach_dev(void *data, void *userdata)
546{
547 struct eeh_pe *pe = (struct eeh_pe *)data;
548 struct eeh_dev *edev, *tmp;
549
550 eeh_pe_for_each_dev(pe, edev, tmp) {
551 if (!(edev->mode & EEH_DEV_DISCONNECTED))
552 continue;
553
554 edev->mode &= ~(EEH_DEV_DISCONNECTED | EEH_DEV_IRQ_DISABLED);
555 eeh_rmv_from_parent_pe(edev);
556 }
557
558 return NULL;
559}
560
561
562
563
564
565
566
567
568static void *__eeh_clear_pe_frozen_state(void *data, void *flag)
569{
570 struct eeh_pe *pe = (struct eeh_pe *)data;
571 bool clear_sw_state = *(bool *)flag;
572 int i, rc = 1;
573
574 for (i = 0; rc && i < 3; i++)
575 rc = eeh_unfreeze_pe(pe, clear_sw_state);
576
577
578 if (rc) {
579 pr_warn("%s: Failure %d unfreezing PHB#%x-PE#%x\n",
580 __func__, rc, pe->phb->global_number, pe->addr);
581 return (void *)pe;
582 }
583
584 return NULL;
585}
586
587static int eeh_clear_pe_frozen_state(struct eeh_pe *pe,
588 bool clear_sw_state)
589{
590 void *rc;
591
592 rc = eeh_pe_traverse(pe, __eeh_clear_pe_frozen_state, &clear_sw_state);
593 if (!rc)
594 eeh_pe_state_clear(pe, EEH_PE_ISOLATED);
595
596 return rc ? -EIO : 0;
597}
598
599int eeh_pe_reset_and_recover(struct eeh_pe *pe)
600{
601 int ret;
602
603
604 if (pe->state & EEH_PE_RECOVERING)
605 return 0;
606
607
608 eeh_pe_state_mark(pe, EEH_PE_RECOVERING);
609
610
611 eeh_pe_dev_traverse(pe, eeh_dev_save_state, NULL);
612
613
614 ret = eeh_pe_reset_full(pe);
615 if (ret) {
616 eeh_pe_state_clear(pe, EEH_PE_RECOVERING);
617 return ret;
618 }
619
620
621 ret = eeh_clear_pe_frozen_state(pe, true);
622 if (ret) {
623 eeh_pe_state_clear(pe, EEH_PE_RECOVERING);
624 return ret;
625 }
626
627
628 eeh_pe_dev_traverse(pe, eeh_dev_restore_state, NULL);
629
630
631 eeh_pe_state_clear(pe, EEH_PE_RECOVERING);
632
633 return 0;
634}
635
636
637
638
639
640
641
642
643
644
645
646
647static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus,
648 struct eeh_rmv_data *rmv_data,
649 bool driver_eeh_aware)
650{
651 time64_t tstamp;
652 int cnt, rc;
653 struct eeh_dev *edev;
654
655
656 cnt = pe->freeze_count;
657 tstamp = pe->tstamp;
658
659
660
661
662
663
664
665 eeh_pe_state_mark(pe, EEH_PE_KEEP);
666 if (driver_eeh_aware || (pe->type & EEH_PE_VF)) {
667 eeh_pe_dev_traverse(pe, eeh_rmv_device, rmv_data);
668 } else {
669 pci_lock_rescan_remove();
670 pci_hp_remove_devices(bus);
671 pci_unlock_rescan_remove();
672 }
673
674
675
676
677
678
679
680
681
682
683 rc = eeh_pe_reset_full(pe);
684 if (rc)
685 return rc;
686
687 pci_lock_rescan_remove();
688
689
690 eeh_ops->configure_bridge(pe);
691 eeh_pe_restore_bars(pe);
692
693
694 rc = eeh_clear_pe_frozen_state(pe, false);
695 if (rc) {
696 pci_unlock_rescan_remove();
697 return rc;
698 }
699
700
701
702
703
704
705
706 if (!driver_eeh_aware || rmv_data->removed) {
707 pr_info("EEH: Sleep 5s ahead of %s hotplug\n",
708 (driver_eeh_aware ? "partial" : "complete"));
709 ssleep(5);
710
711
712
713
714
715
716 edev = list_first_entry(&pe->edevs, struct eeh_dev, list);
717 eeh_pe_traverse(pe, eeh_pe_detach_dev, NULL);
718 if (pe->type & EEH_PE_VF) {
719 eeh_add_virt_device(edev, NULL);
720 } else {
721 if (!driver_eeh_aware)
722 eeh_pe_state_clear(pe, EEH_PE_PRI_BUS);
723 pci_hp_add_devices(bus);
724 }
725 }
726 eeh_pe_state_clear(pe, EEH_PE_KEEP);
727
728 pe->tstamp = tstamp;
729 pe->freeze_count = cnt;
730
731 pci_unlock_rescan_remove();
732 return 0;
733}
734
735
736
737
738#define MAX_WAIT_FOR_RECOVERY 300
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761void eeh_handle_normal_event(struct eeh_pe *pe)
762{
763 struct pci_bus *bus;
764 struct eeh_dev *edev, *tmp;
765 int rc = 0;
766 enum pci_ers_result result = PCI_ERS_RESULT_NONE;
767 struct eeh_rmv_data rmv_data = {LIST_HEAD_INIT(rmv_data.edev_list), 0};
768
769 bus = eeh_pe_bus_get(pe);
770 if (!bus) {
771 pr_err("%s: Cannot find PCI bus for PHB#%x-PE#%x\n",
772 __func__, pe->phb->global_number, pe->addr);
773 return;
774 }
775
776 eeh_pe_state_mark(pe, EEH_PE_RECOVERING);
777
778 eeh_pe_update_time_stamp(pe);
779 pe->freeze_count++;
780 if (pe->freeze_count > eeh_max_freezes) {
781 pr_err("EEH: PHB#%x-PE#%x has failed %d times in the\n"
782 "last hour and has been permanently disabled.\n",
783 pe->phb->global_number, pe->addr,
784 pe->freeze_count);
785 goto hard_fail;
786 }
787 pr_warn("EEH: This PCI device has failed %d times in the last hour\n",
788 pe->freeze_count);
789
790
791
792
793
794
795
796
797
798
799
800 pr_info("EEH: Notify device drivers to shutdown\n");
801 eeh_pe_dev_traverse(pe, eeh_report_error, &result);
802 if ((pe->type & EEH_PE_PHB) &&
803 result != PCI_ERS_RESULT_NONE &&
804 result != PCI_ERS_RESULT_NEED_RESET)
805 result = PCI_ERS_RESULT_NEED_RESET;
806
807
808
809
810 rc = eeh_ops->wait_state(pe, MAX_WAIT_FOR_RECOVERY*1000);
811 if (rc < 0 || rc == EEH_STATE_NOT_SUPPORT) {
812 pr_warn("EEH: Permanent failure\n");
813 goto hard_fail;
814 }
815
816
817
818
819
820 pr_info("EEH: Collect temporary log\n");
821 eeh_slot_error_detail(pe, EEH_LOG_TEMP);
822
823
824
825
826
827 if (result == PCI_ERS_RESULT_NONE) {
828 pr_info("EEH: Reset with hotplug activity\n");
829 rc = eeh_reset_device(pe, bus, NULL, false);
830 if (rc) {
831 pr_warn("%s: Unable to reset, err=%d\n",
832 __func__, rc);
833 goto hard_fail;
834 }
835 }
836
837
838 if (result == PCI_ERS_RESULT_CAN_RECOVER) {
839 pr_info("EEH: Enable I/O for affected devices\n");
840 rc = eeh_pci_enable(pe, EEH_OPT_THAW_MMIO);
841
842 if (rc < 0)
843 goto hard_fail;
844 if (rc) {
845 result = PCI_ERS_RESULT_NEED_RESET;
846 } else {
847 pr_info("EEH: Notify device drivers to resume I/O\n");
848 eeh_pe_dev_traverse(pe, eeh_report_mmio_enabled, &result);
849 }
850 }
851
852
853 if (result == PCI_ERS_RESULT_CAN_RECOVER) {
854 pr_info("EEH: Enabled DMA for affected devices\n");
855 rc = eeh_pci_enable(pe, EEH_OPT_THAW_DMA);
856
857 if (rc < 0)
858 goto hard_fail;
859 if (rc) {
860 result = PCI_ERS_RESULT_NEED_RESET;
861 } else {
862
863
864
865
866
867 eeh_pe_state_clear(pe, EEH_PE_ISOLATED);
868 result = PCI_ERS_RESULT_RECOVERED;
869 }
870 }
871
872
873 if (result == PCI_ERS_RESULT_DISCONNECT) {
874 pr_warn("EEH: Device driver gave up\n");
875 goto hard_fail;
876 }
877
878
879 if (result == PCI_ERS_RESULT_NEED_RESET) {
880 pr_info("EEH: Reset without hotplug activity\n");
881 rc = eeh_reset_device(pe, bus, &rmv_data, true);
882 if (rc) {
883 pr_warn("%s: Cannot reset, err=%d\n",
884 __func__, rc);
885 goto hard_fail;
886 }
887
888 pr_info("EEH: Notify device drivers "
889 "the completion of reset\n");
890 result = PCI_ERS_RESULT_NONE;
891 eeh_pe_dev_traverse(pe, eeh_report_reset, &result);
892 }
893
894
895 if ((result != PCI_ERS_RESULT_RECOVERED) &&
896 (result != PCI_ERS_RESULT_NONE)) {
897 pr_warn("EEH: Not recovered\n");
898 goto hard_fail;
899 }
900
901
902
903
904
905 list_for_each_entry_safe(edev, tmp, &rmv_data.edev_list, rmv_list) {
906 eeh_add_virt_device(edev, NULL);
907 list_del(&edev->rmv_list);
908 }
909
910
911 pr_info("EEH: Notify device driver to resume\n");
912 eeh_pe_dev_traverse(pe, eeh_report_resume, NULL);
913
914 goto final;
915
916hard_fail:
917
918
919
920
921
922 pr_err("EEH: Unable to recover from failure from PHB#%x-PE#%x.\n"
923 "Please try reseating or replacing it\n",
924 pe->phb->global_number, pe->addr);
925
926 eeh_slot_error_detail(pe, EEH_LOG_PERM);
927
928
929 eeh_pe_dev_traverse(pe, eeh_report_failure, NULL);
930
931
932 eeh_pe_state_mark(pe, EEH_PE_REMOVED);
933
934
935
936
937
938
939 if (pe->type & EEH_PE_VF) {
940 eeh_pe_dev_traverse(pe, eeh_rmv_device, NULL);
941 eeh_pe_dev_mode_mark(pe, EEH_DEV_REMOVED);
942 } else {
943 eeh_pe_state_clear(pe, EEH_PE_PRI_BUS);
944 eeh_pe_dev_mode_mark(pe, EEH_DEV_REMOVED);
945
946 pci_lock_rescan_remove();
947 pci_hp_remove_devices(bus);
948 pci_unlock_rescan_remove();
949
950 return;
951 }
952final:
953 eeh_pe_state_clear(pe, EEH_PE_RECOVERING);
954}
955
956
957
958
959
960
961
962
963void eeh_handle_special_event(void)
964{
965 struct eeh_pe *pe, *phb_pe;
966 struct pci_bus *bus;
967 struct pci_controller *hose;
968 unsigned long flags;
969 int rc;
970
971
972 do {
973 rc = eeh_ops->next_error(&pe);
974
975 switch (rc) {
976 case EEH_NEXT_ERR_DEAD_IOC:
977
978 eeh_serialize_lock(&flags);
979
980
981 eeh_remove_event(NULL, true);
982
983 list_for_each_entry(hose, &hose_list, list_node) {
984 phb_pe = eeh_phb_pe_get(hose);
985 if (!phb_pe) continue;
986
987 eeh_pe_state_mark(phb_pe, EEH_PE_ISOLATED);
988 }
989
990 eeh_serialize_unlock(flags);
991
992 break;
993 case EEH_NEXT_ERR_FROZEN_PE:
994 case EEH_NEXT_ERR_FENCED_PHB:
995 case EEH_NEXT_ERR_DEAD_PHB:
996
997 eeh_serialize_lock(&flags);
998
999
1000 eeh_remove_event(pe, true);
1001
1002 if (rc == EEH_NEXT_ERR_DEAD_PHB)
1003 eeh_pe_state_mark(pe, EEH_PE_ISOLATED);
1004 else
1005 eeh_pe_state_mark(pe,
1006 EEH_PE_ISOLATED | EEH_PE_RECOVERING);
1007
1008 eeh_serialize_unlock(flags);
1009
1010 break;
1011 case EEH_NEXT_ERR_NONE:
1012 return;
1013 default:
1014 pr_warn("%s: Invalid value %d from next_error()\n",
1015 __func__, rc);
1016 return;
1017 }
1018
1019
1020
1021
1022
1023
1024 if (rc == EEH_NEXT_ERR_FROZEN_PE ||
1025 rc == EEH_NEXT_ERR_FENCED_PHB) {
1026 eeh_handle_normal_event(pe);
1027 } else {
1028 pci_lock_rescan_remove();
1029 list_for_each_entry(hose, &hose_list, list_node) {
1030 phb_pe = eeh_phb_pe_get(hose);
1031 if (!phb_pe ||
1032 !(phb_pe->state & EEH_PE_ISOLATED) ||
1033 (phb_pe->state & EEH_PE_RECOVERING))
1034 continue;
1035
1036
1037 eeh_pe_state_clear(pe, EEH_PE_PRI_BUS);
1038 eeh_pe_dev_traverse(pe,
1039 eeh_report_failure, NULL);
1040 bus = eeh_pe_bus_get(phb_pe);
1041 if (!bus) {
1042 pr_err("%s: Cannot find PCI bus for "
1043 "PHB#%x-PE#%x\n",
1044 __func__,
1045 pe->phb->global_number,
1046 pe->addr);
1047 break;
1048 }
1049 pci_hp_remove_devices(bus);
1050 }
1051 pci_unlock_rescan_remove();
1052 }
1053
1054
1055
1056
1057
1058 if (rc == EEH_NEXT_ERR_DEAD_IOC)
1059 break;
1060 } while (rc != EEH_NEXT_ERR_NONE);
1061}
1062