summaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/ps3/device-init.c
blob: 57caaf11a83f6064f278a1c6041202abb7ad59a8 (plain)
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
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
/*
 *  PS3 device registration routines.
 *
 *  Copyright (C) 2007 Sony Computer Entertainment Inc.
 *  Copyright 2007 Sony Corp.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/delay.h>
#include <linux/freezer.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/reboot.h>

#include <asm/firmware.h>
#include <asm/lv1call.h>
#include <asm/ps3stor.h>

#include "platform.h"

static int __init ps3_register_lpm_devices(void)
{
	int result;
	u64 tmp1;
	u64 tmp2;
	struct ps3_system_bus_device *dev;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return -ENOMEM;

	dev->match_id = PS3_MATCH_ID_LPM;
	dev->dev_type = PS3_DEVICE_TYPE_LPM;

	/* The current lpm driver only supports a single BE processor. */

	result = ps3_repository_read_be_node_id(0, &dev->lpm.node_id);

	if (result) {
		pr_debug("%s:%d: ps3_repository_read_be_node_id failed \n",
			__func__, __LINE__);
		goto fail_read_repo;
	}

	result = ps3_repository_read_lpm_privileges(dev->lpm.node_id, &tmp1,
		&dev->lpm.rights);

	if (result) {
		pr_debug("%s:%d: ps3_repository_read_lpm_privleges failed \n",
			__func__, __LINE__);
		goto fail_read_repo;
	}

	lv1_get_logical_partition_id(&tmp2);

	if (tmp1 != tmp2) {
		pr_debug("%s:%d: wrong lpar\n",
			__func__, __LINE__);
		result = -ENODEV;
		goto fail_rights;
	}

	if (!(dev->lpm.rights & PS3_LPM_RIGHTS_USE_LPM)) {
		pr_debug("%s:%d: don't have rights to use lpm\n",
			__func__, __LINE__);
		result = -EPERM;
		goto fail_rights;
	}

	pr_debug("%s:%d: pu_id %llu, rights %llu(%llxh)\n",
		__func__, __LINE__, dev->lpm.pu_id, dev->lpm.rights,
		dev->lpm.rights);

	result = ps3_repository_read_pu_id(0, &dev->lpm.pu_id);

	if (result) {
		pr_debug("%s:%d: ps3_repository_read_pu_id failed \n",
			__func__, __LINE__);
		goto fail_read_repo;
	}

	result = ps3_system_bus_device_register(dev);

	if (result) {
		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
			__func__, __LINE__);
		goto fail_register;
	}

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return 0;


fail_register:
fail_rights:
fail_read_repo:
	kfree(dev);
	pr_debug(" <- %s:%d: failed\n", __func__, __LINE__);
	return result;
}

/**
 * ps3_setup_gelic_device - Setup and register a gelic device instance.
 *
 * Allocates memory for a struct ps3_system_bus_device instance, initialises the
 * structure members, and registers the device instance with the system bus.
 */

static int __init ps3_setup_gelic_device(
	const struct ps3_repository_device *repo)
{
	int result;
	struct layout {
		struct ps3_system_bus_device dev;
		struct ps3_dma_region d_region;
	} *p;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
	BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);

	p = kzalloc(sizeof(struct layout), GFP_KERNEL);

	if (!p) {
		result = -ENOMEM;
		goto fail_malloc;
	}

	p->dev.match_id = PS3_MATCH_ID_GELIC;
	p->dev.dev_type = PS3_DEVICE_TYPE_SB;
	p->dev.bus_id = repo->bus_id;
	p->dev.dev_id = repo->dev_id;
	p->dev.d_region = &p->d_region;

	result = ps3_repository_find_interrupt(repo,
		PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);

	if (result) {
		pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
			__func__, __LINE__);
		goto fail_find_interrupt;
	}

	BUG_ON(p->dev.interrupt_id != 0);

	result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
		PS3_DMA_OTHER, NULL, 0);

	if (result) {
		pr_debug("%s:%d ps3_dma_region_init failed\n",
			__func__, __LINE__);
		goto fail_dma_init;
	}

	result = ps3_system_bus_device_register(&p->dev);

	if (result) {
		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
			__func__, __LINE__);
		goto fail_device_register;
	}

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return result;

fail_device_register:
fail_dma_init:
fail_find_interrupt:
	kfree(p);
fail_malloc:
	pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
	return result;
}

static int __ref ps3_setup_uhc_device(
	const struct ps3_repository_device *repo, enum ps3_match_id match_id,
	enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
{
	int result;
	struct layout {
		struct ps3_system_bus_device dev;
		struct ps3_dma_region d_region;
		struct ps3_mmio_region m_region;
	} *p;
	u64 bus_addr;
	u64 len;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
	BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);

	p = kzalloc(sizeof(struct layout), GFP_KERNEL);

	if (!p) {
		result = -ENOMEM;
		goto fail_malloc;
	}

	p->dev.match_id = match_id;
	p->dev.dev_type = PS3_DEVICE_TYPE_SB;
	p->dev.bus_id = repo->bus_id;
	p->dev.dev_id = repo->dev_id;
	p->dev.d_region = &p->d_region;
	p->dev.m_region = &p->m_region;

	result = ps3_repository_find_interrupt(repo,
		interrupt_type, &p->dev.interrupt_id);

	if (result) {
		pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
			__func__, __LINE__);
		goto fail_find_interrupt;
	}

	result = ps3_repository_find_reg(repo, reg_type,
		&bus_addr, &len);

	if (result) {
		pr_debug("%s:%d ps3_repository_find_reg failed\n",
			__func__, __LINE__);
		goto fail_find_reg;
	}

	result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
		PS3_DMA_INTERNAL, NULL, 0);

	if (result) {
		pr_debug("%s:%d ps3_dma_region_init failed\n",
			__func__, __LINE__);
		goto fail_dma_init;
	}

	result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
		PS3_MMIO_4K);

	if (result) {
		pr_debug("%s:%d ps3_mmio_region_init failed\n",
			__func__, __LINE__);
		goto fail_mmio_init;
	}

	result = ps3_system_bus_device_register(&p->dev);

	if (result) {
		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
			__func__, __LINE__);
		goto fail_device_register;
	}

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return result;

fail_device_register:
fail_mmio_init:
fail_dma_init:
fail_find_reg:
fail_find_interrupt:
	kfree(p);
fail_malloc:
	pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
	return result;
}

static int __init ps3_setup_ehci_device(
	const struct ps3_repository_device *repo)
{
	return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
		PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
}

static int __init ps3_setup_ohci_device(
	const struct ps3_repository_device *repo)
{
	return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
		PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
}

static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
	unsigned int port_number)
{
	int result;
	struct layout {
		struct ps3_system_bus_device dev;
	} *p;

	pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
		match_id, port_number);

	p = kzalloc(sizeof(struct layout), GFP_KERNEL);

	if (!p)
		return -ENOMEM;

	p->dev.match_id = match_id;
	p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
	p->dev.port_number = port_number;

	result = ps3_system_bus_device_register(&p->dev);

	if (result) {
		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
			__func__, __LINE__);
		goto fail_device_register;
	}
	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return 0;

fail_device_register:
	kfree(p);
	pr_debug(" <- %s:%d fail\n", __func__, __LINE__);
	return result;
}

static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
				 enum ps3_match_id match_id)
{
	int result;
	struct ps3_storage_device *p;
	u64 port, blk_size, num_blocks;
	unsigned int num_regions, i;

	pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);

	result = ps3_repository_read_stor_dev_info(repo->bus_index,
						   repo->dev_index, &port,
						   &blk_size, &num_blocks,
						   &num_regions);
	if (result) {
		printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
		       __func__, __LINE__, result);
		return -ENODEV;
	}

	pr_debug("%s:%u: (%u:%u:%u): port %llu blk_size %llu num_blocks %llu "
		 "num_regions %u\n", __func__, __LINE__, repo->bus_index,
		 repo->dev_index, repo->dev_type, port, blk_size, num_blocks,
		 num_regions);

	p = kzalloc(sizeof(struct ps3_storage_device) +
		    num_regions * sizeof(struct ps3_storage_region),
		    GFP_KERNEL);
	if (!p) {
		result = -ENOMEM;
		goto fail_malloc;
	}

	p->sbd.match_id = match_id;
	p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
	p->sbd.bus_id = repo->bus_id;
	p->sbd.dev_id = repo->dev_id;
	p->sbd.d_region = &p->dma_region;
	p->blk_size = blk_size;
	p->num_regions = num_regions;

	result = ps3_repository_find_interrupt(repo,
					       PS3_INTERRUPT_TYPE_EVENT_PORT,
					       &p->sbd.interrupt_id);
	if (result) {
		printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
		       __LINE__, result);
		result = -ENODEV;
		goto fail_find_interrupt;
	}

	for (i = 0; i < num_regions; i++) {
		unsigned int id;
		u64 start, size;

		result = ps3_repository_read_stor_dev_region(repo->bus_index,
							     repo->dev_index,
							     i, &id, &start,
							     &size);
		if (result) {
			printk(KERN_ERR
			       "%s:%u: read_stor_dev_region failed %d\n",
			       __func__, __LINE__, result);
			result = -ENODEV;
			goto fail_read_region;
		}
		pr_debug("%s:%u: region %u: id %u start %llu size %llu\n",
			 __func__, __LINE__, i, id, start, size);

		p->regions[i].id = id;
		p->regions[i].start = start;
		p->regions[i].size = size;
	}

	result = ps3_system_bus_device_register(&p->sbd);
	if (result) {
		pr_debug("%s:%u ps3_system_bus_device_register failed\n",
			 __func__, __LINE__);
		goto fail_device_register;
	}

	pr_debug(" <- %s:%u\n", __func__, __LINE__);
	return 0;

fail_device_register:
fail_read_region:
fail_find_interrupt:
	kfree(p);
fail_malloc:
	pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
	return result;
}

static int __init ps3_register_vuart_devices(void)
{
	int result;
	unsigned int port_number;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	result = ps3_repository_read_vuart_av_port(&port_number);
	if (result)
		port_number = 0; /* av default */

	result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
	WARN_ON(result);

	result = ps3_repository_read_vuart_sysmgr_port(&port_number);
	if (result)
		port_number = 2; /* sysmgr default */

	result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
		port_number);
	WARN_ON(result);

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return result;
}

static int __init ps3_register_sound_devices(void)
{
	int result;
	struct layout {
		struct ps3_system_bus_device dev;
		struct ps3_dma_region d_region;
		struct ps3_mmio_region m_region;
	} *p;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	p->dev.match_id = PS3_MATCH_ID_SOUND;
	p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
	p->dev.d_region = &p->d_region;
	p->dev.m_region = &p->m_region;

	result = ps3_system_bus_device_register(&p->dev);

	if (result) {
		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
			__func__, __LINE__);
		goto fail_device_register;
	}
	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return 0;

fail_device_register:
	kfree(p);
	pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
	return result;
}

static int __init ps3_register_graphics_devices(void)
{
	int result;
	struct layout {
		struct ps3_system_bus_device dev;
	} *p;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	p = kzalloc(sizeof(struct layout), GFP_KERNEL);

	if (!p)
		return -ENOMEM;

	p->dev.match_id = PS3_MATCH_ID_GPU;
	p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_FB;
	p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;

	result = ps3_system_bus_device_register(&p->dev);

	if (result) {
		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
			__func__, __LINE__);
		goto fail_device_register;
	}

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return 0;

fail_device_register:
	kfree(p);
	pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
	return result;
}

static int __init ps3_register_ramdisk_device(void)
{
	int result;
	struct layout {
		struct ps3_system_bus_device dev;
	} *p;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	p = kzalloc(sizeof(struct layout), GFP_KERNEL);

	if (!p)
		return -ENOMEM;

	p->dev.match_id = PS3_MATCH_ID_GPU;
	p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK;
	p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;

	result = ps3_system_bus_device_register(&p->dev);

	if (result) {
		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
			__func__, __LINE__);
		goto fail_device_register;
	}

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return 0;

fail_device_register:
	kfree(p);
	pr_debug(" <- %s:%d failed\n", __func__, __LINE__);
	return result;
}

/**
 * ps3_setup_dynamic_device - Setup a dynamic device from the repository
 */

static int ps3_setup_dynamic_device(const struct ps3_repository_device *repo)
{
	int result;

	switch (repo->dev_type) {
	case PS3_DEV_TYPE_STOR_DISK:
		result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);

		/* Some devices are not accessible from the Other OS lpar. */
		if (result == -ENODEV) {
			result = 0;
			pr_debug("%s:%u: not accessible\n", __func__,
				 __LINE__);
		}

		if (result)
			pr_debug("%s:%u ps3_setup_storage_dev failed\n",
				 __func__, __LINE__);
		break;

	case PS3_DEV_TYPE_STOR_ROM:
		result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
		if (result)
			pr_debug("%s:%u ps3_setup_storage_dev failed\n",
				 __func__, __LINE__);
		break;

	case PS3_DEV_TYPE_STOR_FLASH:
		result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
		if (result)
			pr_debug("%s:%u ps3_setup_storage_dev failed\n",
				 __func__, __LINE__);
		break;

	default:
		result = 0;
		pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
			repo->dev_type);
	}

	return result;
}

/**
 * ps3_setup_static_device - Setup a static device from the repository
 */

static int __init ps3_setup_static_device(const struct ps3_repository_device *repo)
{
	int result;

	switch (repo->dev_type) {
	case PS3_DEV_TYPE_SB_GELIC:
		result = ps3_setup_gelic_device(repo);
		if (result) {
			pr_debug("%s:%d ps3_setup_gelic_device failed\n",
				__func__, __LINE__);
		}
		break;
	case PS3_DEV_TYPE_SB_USB:

		/* Each USB device has both an EHCI and an OHCI HC */

		result = ps3_setup_ehci_device(repo);

		if (result) {
			pr_debug("%s:%d ps3_setup_ehci_device failed\n",
				__func__, __LINE__);
		}

		result = ps3_setup_ohci_device(repo);

		if (result) {
			pr_debug("%s:%d ps3_setup_ohci_device failed\n",
				__func__, __LINE__);
		}
		break;

	default:
		return ps3_setup_dynamic_device(repo);
	}

	return result;
}

static void ps3_find_and_add_device(u64 bus_id, u64 dev_id)
{
	struct ps3_repository_device repo;
	int res;
	unsigned int retries;
	unsigned long rem;

	/*
	 * On some firmware versions (e.g. 1.90), the device may not show up
	 * in the repository immediately
	 */
	for (retries = 0; retries < 10; retries++) {
		res = ps3_repository_find_device_by_id(&repo, bus_id, dev_id);
		if (!res)
			goto found;

		rem = msleep_interruptible(100);
		if (rem)
			break;
	}
	pr_warning("%s:%u: device %llu:%llu not found\n", __func__, __LINE__,
		   bus_id, dev_id);
	return;

found:
	if (retries)
		pr_debug("%s:%u: device %llu:%llu found after %u retries\n",
			 __func__, __LINE__, bus_id, dev_id, retries);

	ps3_setup_dynamic_device(&repo);
	return;
}

#define PS3_NOTIFICATION_DEV_ID		ULONG_MAX
#define PS3_NOTIFICATION_INTERRUPT_ID	0

struct ps3_notification_device {
	struct ps3_system_bus_device sbd;
	spinlock_t lock;
	u64 tag;
	u64 lv1_status;
	struct completion done;
};

enum ps3_notify_type {
	notify_device_ready = 0,
	notify_region_probe = 1,
	notify_region_update = 2,
};

struct ps3_notify_cmd {
	u64 operation_code;		/* must be zero */
	u64 event_mask;			/* OR of 1UL << enum ps3_notify_type */
};

struct ps3_notify_event {
	u64 event_type;			/* enum ps3_notify_type */
	u64 bus_id;
	u64 dev_id;
	u64 dev_type;
	u64 dev_port;
};

static irqreturn_t ps3_notification_interrupt(int irq, void *data)
{
	struct ps3_notification_device *dev = data;
	int res;
	u64 tag, status;

	spin_lock(&dev->lock);
	res = lv1_storage_get_async_status(PS3_NOTIFICATION_DEV_ID, &tag,
					   &status);
	if (tag != dev->tag)
		pr_err("%s:%u: tag mismatch, got %llx, expected %llx\n",
		       __func__, __LINE__, tag, dev->tag);

	if (res) {
		pr_err("%s:%u: res %d status 0x%llx\n", __func__, __LINE__, res,
		       status);
	} else {
		pr_debug("%s:%u: completed, status 0x%llx\n", __func__,
			 __LINE__, status);
		dev->lv1_status = status;
		complete(&dev->done);
	}
	spin_unlock(&dev->lock);
	return IRQ_HANDLED;
}

static int ps3_notification_read_write(struct ps3_notification_device *dev,
				       u64 lpar, int write)
{
	const char *op = write ? "write" : "read";
	unsigned long flags;
	int res;

	init_completion(&dev->done);
	spin_lock_irqsave(&dev->lock, flags);
	res = write ? lv1_storage_write(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
					&dev->tag)
		    : lv1_storage_read(dev->sbd.dev_id, 0, 0, 1, 0, lpar,
				       &dev->tag);
	spin_unlock_irqrestore(&dev->lock, flags);
	if (res) {
		pr_err("%s:%u: %s failed %d\n", __func__, __LINE__, op, res);
		return -EPERM;
	}
	pr_debug("%s:%u: notification %s issued\n", __func__, __LINE__, op);

	res = wait_event_interruptible(dev->done.wait,
				       dev->done.done || kthread_should_stop());
	if (kthread_should_stop())
		res = -EINTR;
	if (res) {
		pr_debug("%s:%u: interrupted %s\n", __func__, __LINE__, op);
		return res;
	}

	if (dev->lv1_status) {
		pr_err("%s:%u: %s not completed, status 0x%llx\n", __func__,
		       __LINE__, op, dev->lv1_status);
		return -EIO;
	}
	pr_debug("%s:%u: notification %s completed\n", __func__, __LINE__, op);

	return 0;
}

static struct task_struct *probe_task;

/**
 * ps3_probe_thread - Background repository probing at system startup.
 *
 * This implementation only supports background probing on a single bus.
 * It uses the hypervisor's storage device notification mechanism to wait until
 * a storage device is ready.  The device notification mechanism uses a
 * pseudo device to asynchronously notify the guest when storage devices become
 * ready.  The notification device has a block size of 512 bytes.
 */

static int ps3_probe_thread(void *data)
{
	struct ps3_notification_device dev;
	int res;
	unsigned int irq;
	u64 lpar;
	void *buf;
	struct ps3_notify_cmd *notify_cmd;
	struct ps3_notify_event *notify_event;

	pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);

	buf = kzalloc(512, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	lpar = ps3_mm_phys_to_lpar(__pa(buf));
	notify_cmd = buf;
	notify_event = buf;

	/* dummy system bus device */
	dev.sbd.bus_id = (u64)data;
	dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
	dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;

	res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0);
	if (res) {
		pr_err("%s:%u: lv1_open_device failed %s\n", __func__,
		       __LINE__, ps3_result(res));
		goto fail_free;
	}

	res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY,
					      &irq);
	if (res) {
		pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
		       __func__, __LINE__, res);
	       goto fail_close_device;
	}

	spin_lock_init(&dev.lock);

	res = request_irq(irq, ps3_notification_interrupt, 0,
			  "ps3_notification", &dev);
	if (res) {
		pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__,
		       res);
		goto fail_sb_event_receive_port_destroy;
	}

	/* Setup and write the request for device notification. */
	notify_cmd->operation_code = 0; /* must be zero */
	notify_cmd->event_mask = 1UL << notify_region_probe;

	res = ps3_notification_read_write(&dev, lpar, 1);
	if (res)
		goto fail_free_irq;

	/* Loop here processing the requested notification events. */
	do {
		try_to_freeze();

		memset(notify_event, 0, sizeof(*notify_event));

		res = ps3_notification_read_write(&dev, lpar, 0);
		if (res)
			break;

		pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu"
			 " type %llu port %llu\n", __func__, __LINE__,
			 notify_event->event_type, notify_event->bus_id,
			 notify_event->dev_id, notify_event->dev_type,
			 notify_event->dev_port);

		if (notify_event->event_type != notify_region_probe ||
		    notify_event->bus_id != dev.sbd.bus_id) {
			pr_warning("%s:%u: bad notify_event: event %llu, "
				   "dev_id %llu, dev_type %llu\n",
				   __func__, __LINE__, notify_event->event_type,
				   notify_event->dev_id,
				   notify_event->dev_type);
			continue;
		}

		ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id);

	} while (!kthread_should_stop());

fail_free_irq:
	free_irq(irq, &dev);
fail_sb_event_receive_port_destroy:
	ps3_sb_event_receive_port_destroy(&dev.sbd, irq);
fail_close_device:
	lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id);
fail_free:
	kfree(buf);

	probe_task = NULL;

	pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);

	return 0;
}

/**
 * ps3_stop_probe_thread - Stops the background probe thread.
 *
 */

static int ps3_stop_probe_thread(struct notifier_block *nb, unsigned long code,
				 void *data)
{
	if (probe_task)
		kthread_stop(probe_task);
	return 0;
}

static struct notifier_block nb = {
	.notifier_call = ps3_stop_probe_thread
};

/**
 * ps3_start_probe_thread - Starts the background probe thread.
 *
 */

static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
{
	int result;
	struct task_struct *task;
	struct ps3_repository_device repo;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	memset(&repo, 0, sizeof(repo));

	repo.bus_type = bus_type;

	result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);

	if (result) {
		printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
		return -ENODEV;
	}

	result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);

	if (result) {
		printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
			result);
		return -ENODEV;
	}

	task = kthread_run(ps3_probe_thread, (void *)repo.bus_id,
			   "ps3-probe-%u", bus_type);

	if (IS_ERR(task)) {
		result = PTR_ERR(task);
		printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
		       result);
		return result;
	}

	probe_task = task;
	register_reboot_notifier(&nb);

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return 0;
}

/**
 * ps3_register_devices - Probe the system and register devices found.
 *
 * A device_initcall() routine.
 */

static int __init ps3_register_devices(void)
{
	int result;

	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
		return -ENODEV;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	/* ps3_repository_dump_bus_info(); */

	result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);

	ps3_register_vuart_devices();

	ps3_register_graphics_devices();

	ps3_repository_find_devices(PS3_BUS_TYPE_SB, ps3_setup_static_device);

	ps3_register_sound_devices();

	ps3_register_lpm_devices();

	ps3_register_ramdisk_device();

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return 0;
}

device_initcall(ps3_register_devices);