1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
|
// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
/*
* Dump support:
* We get dump notification from different sources:
* - During system initialization via HDAT
* - During FSP reset/reload (FipS dump)
* - Dump available notification MBOX command (0xCE, 0x78, 0x00)
*
* To avoid complications, we keep list of dumps in a list and fetch
* them serially.
*
* Dump retrieve process:
* - Once we get notification from FSP we enqueue the dump ID and notify
* Linux via OPAL event notification.
* - Linux reads dump info and allocates required memory to fetch the dump
* and makes dump read call.
* - Sapphire fetches dump data from FSP.
* - Linux writes dump to disk and sends acknowledgement.
* - Sapphire acknowledges FSP.
*
* Copyright 2013-2015 IBM Corp.
*/
#include <fsp.h>
#include <psi.h>
#include <lock.h>
#include <device.h>
#include <skiboot.h>
#include <errorlog.h>
#include <opal-api.h>
/*
* Max outstanding dumps to retrieve
*
* Note:
* Dumps are serialized. We don't get notification for second
* dump of given type until we acknowledge first one. But we
* may get notification for different dump type. And our dump
* retrieval code is serialized. Hence we use list to keep
* track of outstanding dumps to be retrieved.
*/
#define MAX_DUMP_RECORD 0x04
/* Max retry */
#define FIPS_DUMP_MAX_RETRY 0x03
/* Dump type */
#define DUMP_TYPE_FSP 0x01
#define DUMP_TYPE_SYS 0x02
#define DUMP_TYPE_SMA 0x03
/* Dump fetch size */
#define DUMP_FETCH_SIZE_FSP 0x500000
#define DUMP_FETCH_SIZE_SYS 0x400000
#define DUMP_FETCH_SIZE_RES 0x200000
/* Params for Fips dump */
#define FSP_DUMP_TOOL_TYPE "SYS "
#define FSP_DUMP_CLIENT_ID "SAPPHIRE_CLIENT"
enum dump_state {
DUMP_STATE_ABSENT, /* No FSP dump */
DUMP_STATE_NONE, /* No dump to retrieve */
DUMP_STATE_NOTIFY, /* Notified Linux */
DUMP_STATE_FETCHING, /* Dump retrieval is in progress */
DUMP_STATE_FETCH, /* Dump retrieve complete */
DUMP_STATE_PARTIAL, /* Partial read */
DUMP_STATE_ABORTING, /* Aborting due to kexec */
};
/* Pending dump list */
struct dump_record {
uint8_t type;
uint32_t id;
uint32_t size;
struct list_node link;
};
/* List definations */
static LIST_HEAD(dump_pending);
static LIST_HEAD(dump_free);
/* Dump retrieve state */
static enum dump_state dump_state = DUMP_STATE_NONE;
/* Dump buffer SG list */
static struct opal_sg_list *dump_data;
static struct dump_record *dump_entry;
static int64_t dump_offset;
static size_t fetch_remain;
/* FipS dump retry count */
static int retry_cnt;
/* Protect list and dump retrieve state */
static struct lock dump_lock = LOCK_UNLOCKED;
/* Forward declaration */
static int64_t fsp_opal_dump_init(uint8_t dump_type);
static int64_t fsp_dump_read(void);
DEFINE_LOG_ENTRY(OPAL_RC_DUMP_INIT, OPAL_PLATFORM_ERR_EVT, OPAL_DUMP,
OPAL_PLATFORM_FIRMWARE,
OPAL_PREDICTIVE_ERR_FAULT_RECTIFY_REBOOT,
OPAL_NA);
DEFINE_LOG_ENTRY(OPAL_RC_DUMP_LIST, OPAL_PLATFORM_ERR_EVT, OPAL_DUMP,
OPAL_PLATFORM_FIRMWARE,
OPAL_INFO,
OPAL_NA);
DEFINE_LOG_ENTRY(OPAL_RC_DUMP_ACK, OPAL_PLATFORM_ERR_EVT, OPAL_DUMP,
OPAL_PLATFORM_FIRMWARE, OPAL_INFO,
OPAL_NA);
/*
* Helper functions
*/
static inline void update_dump_state(enum dump_state state)
{
dump_state = state;
}
static int64_t check_dump_state(void)
{
switch (dump_state) {
case DUMP_STATE_ABSENT:
return OPAL_HARDWARE;
case DUMP_STATE_NONE:
case DUMP_STATE_NOTIFY:
/* During dump fetch, notify is wrong state */
return OPAL_WRONG_STATE;
case DUMP_STATE_FETCHING:
case DUMP_STATE_ABORTING:
return OPAL_BUSY_EVENT;
case DUMP_STATE_FETCH:
return OPAL_SUCCESS;
case DUMP_STATE_PARTIAL:
return OPAL_PARTIAL;
}
return OPAL_SUCCESS;
}
static inline void dump_tce_map(uint32_t tce_offset,
void *buffer, uint32_t size)
{
uint32_t tlen = ALIGN_UP(size, TCE_PSIZE);
fsp_tce_map(PSI_DMA_DUMP_DATA + tce_offset, buffer, tlen);
}
static inline void dump_tce_unmap(uint32_t size)
{
fsp_tce_unmap(PSI_DMA_DUMP_DATA, size);
}
/*
* Returns Data set ID for the given dump type
*/
static inline uint16_t get_dump_data_set_id(uint8_t type)
{
switch (type) {
case DUMP_TYPE_FSP:
return FSP_DATASET_SP_DUMP;
case DUMP_TYPE_SYS:
return FSP_DATASET_HW_DUMP;
default:
break;
}
return OPAL_INTERNAL_ERROR;
}
/*
* Returns max data we can fetch from FSP fetch data call
*/
static inline int64_t get_dump_fetch_max_size(uint8_t type)
{
switch (type) {
case DUMP_TYPE_FSP:
return DUMP_FETCH_SIZE_FSP;
case DUMP_TYPE_SYS:
return DUMP_FETCH_SIZE_SYS;
default:
break;
}
return OPAL_INTERNAL_ERROR;
}
/*
* Get dump record from pending list
*/
static inline struct dump_record *get_dump_rec_from_list(uint32_t id)
{
struct dump_record *record;
list_for_each(&dump_pending, record, link) {
if (record->id == id)
return record;
}
return NULL;
}
/*
* New dump available notification to Linux
*/
static void update_opal_dump_notify(void)
{
/*
* Wait until current dump retrieval to complete
* before notifying again.
*/
if (dump_state != DUMP_STATE_NONE)
return;
/* More dump's to retrieve */
if (!list_empty(&dump_pending)) {
update_dump_state(DUMP_STATE_NOTIFY);
opal_update_pending_evt(OPAL_EVENT_DUMP_AVAIL,
OPAL_EVENT_DUMP_AVAIL);
}
}
static int64_t remove_dump_id_from_list(uint32_t dump_id)
{
struct dump_record *record, *nxt_record;
int rc = OPAL_SUCCESS;
bool found = false;
/* Remove record from pending list */
list_for_each_safe(&dump_pending, record, nxt_record, link) {
if (record->id != dump_id)
continue;
found = true;
list_del(&record->link);
list_add(&dump_free, &record->link);
break;
}
/*
* Continue update_opal_dump_notify even if it fails
* to remove ID. So that we can resend notification
* for the same dump ID to Linux.
*/
if (!found) { /* List corrupted? */
log_simple_error(&e_info(OPAL_RC_DUMP_LIST),
"DUMP: ID 0x%x not found in list!\n",
dump_id);
rc = OPAL_PARAMETER;
}
/* Update state */
update_dump_state(DUMP_STATE_NONE);
/* Notify next available dump to retrieve */
update_opal_dump_notify();
return rc;
}
static int64_t add_dump_id_to_list(uint8_t dump_type,
uint32_t dump_id, uint32_t dump_size)
{
struct dump_record *record;
int rc = OPAL_SUCCESS;
lock(&dump_lock);
rc = check_dump_state();
if (rc == OPAL_HARDWARE)
goto out;
/* List is full ? */
if (list_empty(&dump_free)) {
printf("DUMP: Dump ID 0x%x is not queued.\n", dump_id);
rc = OPAL_RESOURCE;
goto out;
}
/* Already queued? */
record = get_dump_rec_from_list(dump_id);
if (record) {
rc = OPAL_SUCCESS;
goto out;
}
/* Add to list */
record = list_pop(&dump_free, struct dump_record, link);
record->type = dump_type;
record->id = dump_id;
record->size = dump_size;
list_add_tail(&dump_pending, &record->link);
/* OPAL notification */
update_opal_dump_notify();
rc = OPAL_SUCCESS;
out:
unlock(&dump_lock);
return rc;
}
static void dump_init_complete(struct fsp_msg *msg)
{
uint8_t status = (msg->resp->word1 >> 8) & 0xff;
printf("DUMP: FipS dump init status = 0x%x\n", status);
fsp_freemsg(msg);
switch (status) {
case FSP_STATUS_SUCCESS:
printf("DUMP: Initiated FipS dump.\n");
break;
case FSP_STATUS_BUSY: /* Retry, if FSP is busy */
if (retry_cnt++ < FIPS_DUMP_MAX_RETRY)
if (fsp_opal_dump_init(DUMP_TYPE_FSP) == OPAL_SUCCESS)
return;
break;
default:
break;
}
/* Reset max retry count */
retry_cnt = 0;
}
/*
* Initiate new FipS dump
*/
static int64_t fsp_opal_dump_init(uint8_t dump_type)
{
struct fsp_msg *msg;
int rc = OPAL_SUCCESS;
uint32_t *tool_type = (void *)FSP_DUMP_TOOL_TYPE;
uint32_t *client_id = (void *)FSP_DUMP_CLIENT_ID;
/* Only FipS dump generate request is supported */
if (dump_type != DUMP_TYPE_FSP)
return OPAL_PARAMETER;
msg = fsp_mkmsg(FSP_CMD_FSP_DUMP_INIT, 6, *tool_type,
sizeof(FSP_DUMP_CLIENT_ID), *client_id,
*(client_id + 1), *(client_id + 2), *(client_id + 3));
if (!msg) {
log_simple_error(&e_info(OPAL_RC_DUMP_INIT),
"DUMP: Message allocation failed.\n");
rc = OPAL_INTERNAL_ERROR;
} else if (fsp_queue_msg(msg, dump_init_complete)) {
log_simple_error(&e_info(OPAL_RC_DUMP_INIT),
"DUMP: Failed to queue FipS dump init request.\n");
fsp_freemsg(msg);
rc = OPAL_INTERNAL_ERROR;
}
return rc;
}
/*
* OPAL interface to send dump information to Linux.
*/
static int64_t fsp_opal_dump_info2(__be32 *dump_id, __be32 *dump_size,
__be32 *dump_type)
{
struct dump_record *record;
int rc = OPAL_SUCCESS;
lock(&dump_lock);
/* Clear notification */
opal_update_pending_evt(OPAL_EVENT_DUMP_AVAIL, 0);
record = list_top(&dump_pending, struct dump_record, link);
if (!record) { /* List corrupted? */
update_dump_state(DUMP_STATE_NONE);
rc = OPAL_INTERNAL_ERROR;
goto out;
}
*dump_id = cpu_to_be32(record->id);
*dump_size = cpu_to_be32(record->size);
*dump_type = cpu_to_be32(record->type);
out:
unlock(&dump_lock);
return rc;
}
static int64_t fsp_opal_dump_info(__be32 *dump_id, __be32 *dump_size)
{
__be32 dump_type;
return fsp_opal_dump_info2(dump_id, dump_size, &dump_type);
}
static int64_t validate_dump_sglist(struct opal_sg_list *list,
int64_t *size)
{
struct opal_sg_list *sg;
struct opal_sg_entry *prev_entry, *entry;
int length, num_entries, i;
prev_entry = NULL;
*size = 0;
for (sg = list; sg; sg = (struct opal_sg_list*)be64_to_cpu(sg->next)) {
length = be64_to_cpu(sg->length) - 16;
num_entries = length / sizeof(struct opal_sg_entry);
if (num_entries <= 0)
return OPAL_PARAMETER;
for (i = 0; i < num_entries; i++) {
entry = &sg->entry[i];
*size += be64_to_cpu(entry->length);
/* All entries must be aligned */
if (((uint64_t)be64_to_cpu(entry->data)) & 0xfff)
return OPAL_PARAMETER;
/* All non-terminal entries size must be aligned */
if (prev_entry && (be64_to_cpu(prev_entry->length) & 0xfff))
return OPAL_PARAMETER;
prev_entry = entry;
}
}
return OPAL_SUCCESS;
}
/*
* Map dump buffer to TCE buffer
*/
static int64_t map_dump_buffer(void)
{
struct opal_sg_list *sg;
struct opal_sg_entry *entry;
int64_t fetch_max;
int length, num_entries, i;
int buf_off, fetch_off, tce_off, sg_off;
bool last = false;
/* FSP fetch max size */
fetch_max = get_dump_fetch_max_size(dump_entry->type);
if (fetch_max > (dump_entry->size - dump_offset))
fetch_remain = dump_entry->size - dump_offset;
else
fetch_remain = fetch_max;
/* offsets */
fetch_off = fetch_remain;
tce_off = sg_off = 0;
for (sg = dump_data; sg; sg = (struct opal_sg_list*)be64_to_cpu(sg->next)) {
num_entries = (be64_to_cpu(sg->length) - 16) /
sizeof(struct opal_sg_entry);
if (num_entries <= 0)
return OPAL_PARAMETER;
for (i = 0; i < num_entries; i++) {
entry = &sg->entry[i];
/* Continue until we get offset */
if ((sg_off + be64_to_cpu(entry->length)) < dump_offset) {
sg_off += be64_to_cpu(entry->length);
continue;
}
/*
* SG list entry size can be more than 4k.
* Map only required pages, instead of
* mapping entire entry.
*/
if (!tce_off) {
buf_off = (dump_offset - sg_off) & ~0xfff;
length = be64_to_cpu(entry->length) - buf_off;
} else {
buf_off = 0;
length = be64_to_cpu(entry->length);
}
/* Adjust length for last mapping */
if (fetch_off <= length) {
length = fetch_off;
last = true;
}
/* Adjust offset */
sg_off += be64_to_cpu(entry->length);
fetch_off -= length;
/* TCE mapping */
dump_tce_map(tce_off, (void*)(be64_to_cpu(entry->data) + buf_off), length);
tce_off += length;
/* TCE mapping complete */
if (last)
return OPAL_SUCCESS;
}
} /* outer loop */
return OPAL_PARAMETER;
}
static void dump_read_complete(struct fsp_msg *msg)
{
void *buffer;
size_t length, offset;
int rc;
uint32_t dump_id;
uint16_t id;
uint8_t flags, status;
bool compl = false;
status = (msg->resp->word1 >> 8) & 0xff;
flags = (fsp_msg_get_data_word(msg, 0) >> 16) & 0xff;
id = fsp_msg_get_data_word(msg, 0) & 0xffff;
dump_id = fsp_msg_get_data_word(msg, 1);
offset = fsp_msg_get_data_word(msg->resp, 1);
length = fsp_msg_get_data_word(msg->resp, 2);
fsp_freemsg(msg);
lock(&dump_lock);
if (dump_state == DUMP_STATE_ABORTING) {
printf("DUMP: Fetch dump aborted, ID = 0x%x\n", dump_id);
dump_tce_unmap(PSI_DMA_DUMP_DATA_SIZE);
update_dump_state(DUMP_STATE_NONE);
goto bail;
}
switch (status) {
case FSP_STATUS_SUCCESS: /* Fetch next dump block */
if (dump_offset < dump_entry->size) {
dump_tce_unmap(PSI_DMA_DUMP_DATA_SIZE);
rc = fsp_dump_read();
if (rc == OPAL_SUCCESS)
goto bail;
} else { /* Dump read complete */
compl = true;
}
break;
case FSP_STATUS_MORE_DATA: /* More data to read */
offset += length;
buffer = (void *)PSI_DMA_DUMP_DATA + offset;
fetch_remain -= length;
rc = fsp_fetch_data_queue(flags, id, dump_id, offset, buffer,
&fetch_remain, dump_read_complete);
if (rc == OPAL_SUCCESS)
goto bail;
break;
default:
break;
}
dump_tce_unmap(PSI_DMA_DUMP_DATA_SIZE);
/* Update state */
if (compl) {
printf("DUMP: Fetch dump success. ID = 0x%x\n", dump_id);
update_dump_state(DUMP_STATE_FETCH);
} else {
printf("DUMP: Fetch dump partial. ID = 0x%x\n", dump_id);
update_dump_state(DUMP_STATE_PARTIAL);
}
bail:
unlock(&dump_lock);
}
/*
* Fetch dump data from FSP
*/
static int64_t fsp_dump_read(void)
{
int64_t rc;
uint16_t data_set;
uint8_t flags = 0x00;
/* Get data set ID */
data_set = get_dump_data_set_id(dump_entry->type);
/* Map TCE buffer */
rc = map_dump_buffer();
if (rc != OPAL_SUCCESS) {
printf("DUMP: TCE mapping failed\n");
return rc;
}
printf("DUMP: Fetch Dump. ID = %02x, sub ID = %08x, len = %ld\n",
data_set, dump_entry->id, fetch_remain);
/* Fetch data */
rc = fsp_fetch_data_queue(flags, data_set, dump_entry->id,
dump_offset, (void *)PSI_DMA_DUMP_DATA,
&fetch_remain, dump_read_complete);
/* Adjust dump fetch offset */
dump_offset += fetch_remain;
return rc;
}
static int64_t fsp_opal_dump_read(uint32_t dump_id,
struct opal_sg_list *list)
{
struct dump_record *record;
int64_t rc, size;
lock(&dump_lock);
/* Check state */
if (dump_state != DUMP_STATE_NOTIFY) {
rc = check_dump_state();
goto out;
}
/* Validate dump ID */
record = get_dump_rec_from_list(dump_id);
if (!record) { /* List corrupted? */
rc = OPAL_INTERNAL_ERROR;
goto out;
}
/* Validate dump buffer and size */
rc = validate_dump_sglist(list, &size);
if (rc != OPAL_SUCCESS) {
printf("DUMP: SG list validation failed\n");
goto out;
}
if (size < record->size) { /* Insuffient buffer */
printf("DUMP: Insufficient buffer\n");
rc = OPAL_PARAMETER;
goto out;
}
/* Update state */
update_dump_state(DUMP_STATE_FETCHING);
/* Fetch dump data */
dump_entry = record;
dump_data = list;
dump_offset = 0;
rc = fsp_dump_read();
if (rc != OPAL_SUCCESS)
goto out;
/* Check status after initiating fetch data */
rc = check_dump_state();
out:
unlock(&dump_lock);
return rc;
}
static void dump_ack_complete(struct fsp_msg *msg)
{
uint8_t status = (msg->resp->word1 >> 8) & 0xff;
if (status)
log_simple_error(&e_info(OPAL_RC_DUMP_ACK),
"DUMP: ACK failed for ID: 0x%x\n",
fsp_msg_get_data_word(msg, 0));
else
printf("DUMP: ACKed dump ID: 0x%x\n", fsp_msg_get_data_word(msg, 0));
fsp_freemsg(msg);
}
/*
* Acknowledge dump
*/
static int64_t fsp_opal_dump_ack(uint32_t dump_id)
{
struct dump_record *record;
struct fsp_msg *msg;
int rc;
uint32_t cmd;
uint8_t dump_type = 0;
/* Get dump type */
lock(&dump_lock);
record = get_dump_rec_from_list(dump_id);
if (record)
dump_type = record->type;
/*
* Next available dump in pending list will be of different
* type. Hence we don't need to wait for ack complete.
*
* Note:
* This allows us to proceed even if we fail to ACK.
* In the worst case we may get notification for the
* same dump again, which is probably better than
* looping forever.
*/
rc = remove_dump_id_from_list(dump_id);
if (rc != OPAL_SUCCESS) /* Invalid dump id */
goto out;
/* Adjust mod value */
cmd = FSP_CMD_ACK_DUMP | (dump_type & 0xff);
msg = fsp_mkmsg(cmd, 1, dump_id);
if (!msg) {
log_simple_error(&e_info(OPAL_RC_DUMP_ACK),
"DUMP: Message allocation failed.!\n");
rc = OPAL_INTERNAL_ERROR;
} else if (fsp_queue_msg(msg, dump_ack_complete)) {
log_simple_error(&e_info(OPAL_RC_DUMP_ACK),
"DUMP: Failed to queue dump ack message.\n");
fsp_freemsg(msg);
rc = OPAL_INTERNAL_ERROR;
}
out:
unlock(&dump_lock);
return rc;
}
/* Resend dump available notification */
static int64_t fsp_opal_dump_resend_notification(void)
{
lock(&dump_lock);
if (dump_state != DUMP_STATE_ABSENT)
update_dump_state(DUMP_STATE_NONE);
update_opal_dump_notify();
unlock(&dump_lock);
return OPAL_SUCCESS;
}
/*
* Handle FSP R/R event.
*/
static bool fsp_dump_retrieve_rr(uint32_t cmd_sub_mod,
struct fsp_msg *msg __unused)
{
switch (cmd_sub_mod) {
case FSP_RESET_START:
lock(&dump_lock);
/* Reset dump state */
if (dump_state == DUMP_STATE_FETCHING)
update_dump_state(DUMP_STATE_ABORTING);
unlock(&dump_lock);
return true;
case FSP_RELOAD_COMPLETE:
lock(&dump_lock);
/* Reset TCE mapping */
dump_tce_unmap(PSI_DMA_DUMP_DATA_SIZE);
/* Reset dump state */
update_dump_state(DUMP_STATE_NONE);
/*
* For now keeping R/R handler simple. In the worst case
* we may endup resending dump available notification for
* same dump ID twice to Linux.
*/
update_opal_dump_notify();
unlock(&dump_lock);
return true;
}
return false;
}
/*
* Handle host kexec'ing scenarios
*/
static bool opal_kexec_dump_notify(void *data __unused)
{
bool ready = true;
lock(&dump_lock);
/* Dump retrieve is in progress? */
if (dump_state == DUMP_STATE_FETCHING)
dump_state = DUMP_STATE_ABORTING;
/* Not yet safe to kexec */
if (dump_state == DUMP_STATE_ABORTING)
ready = false;
unlock(&dump_lock);
return ready;
}
/*
* FipS dump notification
*/
void fsp_fips_dump_notify(uint32_t dump_id, uint32_t dump_size)
{
printf("DUMP: FipS dump available. ID = 0x%x [size: %d bytes]\n",
dump_id, dump_size);
add_dump_id_to_list(DUMP_TYPE_FSP, dump_id, dump_size);
}
/*
* System/Platform dump notification
*/
static bool fsp_sys_dump_notify(uint32_t cmd_sub_mod, struct fsp_msg *msg)
{
/*
* Though spec says mod 00 is deprecated we still
* seems to get mod 00 notification (at least on
* P7 machine).
*/
if (cmd_sub_mod != FSP_RSP_SYS_DUMP &&
cmd_sub_mod != FSP_RSP_SYS_DUMP_OLD)
return false;
printf("DUMP: Platform dump available. ID = 0x%x [size: %d bytes]\n",
fsp_msg_get_data_word(msg, 0), fsp_msg_get_data_word(msg, 1));
add_dump_id_to_list(DUMP_TYPE_SYS,
fsp_msg_get_data_word(msg, 0),
fsp_msg_get_data_word(msg, 1));
return true;
}
/*
* If platform dump available during IPL time, then we
* get notification via HDAT. Check for DT for the dump
* presence.
*/
static void check_ipl_sys_dump(void)
{
struct dt_node *dump_node;
uint32_t dump_id, dump_size;
if (proc_gen >= proc_gen_p9)
return;
dump_node = dt_find_by_path(dt_root, "ipl-params/platform-dump");
if (!dump_node)
return;
if (!dt_find_property(dump_node, "dump-id"))
return;
dump_id = dt_prop_get_u32(dump_node, "dump-id");
dump_size = (uint32_t)dt_prop_get_u64(dump_node, "total-size");
printf("DUMP: Platform dump present during IPL.\n");
printf(" ID = 0x%x [size: %d bytes]\n", dump_id, dump_size);
add_dump_id_to_list(DUMP_TYPE_SYS, dump_id, dump_size);
}
/*
* Allocate and initialize dump list
*/
static int init_dump_free_list(void)
{
struct dump_record *entry;
int i;
entry = zalloc(sizeof(struct dump_record) * MAX_DUMP_RECORD);
if (!entry) {
log_simple_error(&e_info(OPAL_RC_DUMP_INIT),
"DUMP: Out of memory\n");
return -ENOMEM;
}
for (i = 0; i < MAX_DUMP_RECORD; i++) {
list_add_tail(&dump_free, &entry->link);
entry++;
}
return 0;
}
static struct fsp_client fsp_sys_dump_client = {
.message = fsp_sys_dump_notify,
};
static struct fsp_client fsp_dump_client_rr = {
.message = fsp_dump_retrieve_rr,
};
void fsp_dump_init(void)
{
if (!fsp_present()) {
update_dump_state(DUMP_STATE_ABSENT);
return;
}
/* Initialize list */
if (init_dump_free_list() != 0) {
update_dump_state(DUMP_STATE_ABSENT);
return;
}
/* Register for Class CE */
fsp_register_client(&fsp_sys_dump_client, FSP_MCLASS_SERVICE);
/* Register for Class AA (FSP R/R) */
fsp_register_client(&fsp_dump_client_rr, FSP_MCLASS_RR_EVENT);
/* Register for sync on host reboot call */
opal_add_host_sync_notifier(opal_kexec_dump_notify, NULL);
/* OPAL interface */
opal_register(OPAL_DUMP_INIT, fsp_opal_dump_init, 1);
opal_register(OPAL_DUMP_INFO, fsp_opal_dump_info, 2);
opal_register(OPAL_DUMP_INFO2, fsp_opal_dump_info2, 3);
opal_register(OPAL_DUMP_READ, fsp_opal_dump_read, 2);
opal_register(OPAL_DUMP_ACK, fsp_opal_dump_ack, 1);
opal_register(OPAL_DUMP_RESEND, fsp_opal_dump_resend_notification, 0);
/* Check for platform dump presence during IPL time */
check_ipl_sys_dump();
}
|