aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/powernv/pci-ioda.c
blob: f31162cfdaa9762f71cafe41e0f815e92181f6fd (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
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
/*
 * Support PCI/PCIe on PowerNV platforms
 *
 * Copyright 2011 Benjamin Herrenschmidt, IBM 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; either version
 * 2 of the License, or (at your option) any later version.
 */

#undef DEBUG

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/msi.h>

#include <asm/sections.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#include <asm/machdep.h>
#include <asm/ppc-pci.h>
#include <asm/opal.h>
#include <asm/iommu.h>
#include <asm/tce.h>
#include <asm/abs_addr.h>

#include "powernv.h"
#include "pci.h"

struct resource_wrap {
	struct list_head	link;
	resource_size_t		size;
	resource_size_t		align;
	struct pci_dev		*dev;	/* Set if it's a device */
	struct pci_bus		*bus;	/* Set if it's a bridge */
};

static int __pe_printk(const char *level, const struct pnv_ioda_pe *pe,
		       struct va_format *vaf)
{
	char pfix[32];

	if (pe->pdev)
		strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix));
	else
		sprintf(pfix, "%04x:%02x     ",
			pci_domain_nr(pe->pbus), pe->pbus->number);
	return printk("pci %s%s: [PE# %.3d] %pV", level, pfix, pe->pe_number, vaf);
}

#define define_pe_printk_level(func, kern_level)		\
static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...)	\
{								\
	struct va_format vaf;					\
	va_list args;						\
	int r;							\
								\
	va_start(args, fmt);					\
								\
	vaf.fmt = fmt;						\
	vaf.va = &args;						\
								\
	r = __pe_printk(kern_level, pe, &vaf);			\
	va_end(args);						\
								\
	return r;						\
}								\

define_pe_printk_level(pe_err, KERN_ERR);
define_pe_printk_level(pe_warn, KERN_WARNING);
define_pe_printk_level(pe_info, KERN_INFO);


/* Calculate resource usage & alignment requirement of a single
 * device. This will also assign all resources within the device
 * for a given type starting at 0 for the biggest one and then
 * assigning in decreasing order of size.
 */
static void __devinit pnv_ioda_calc_dev(struct pci_dev *dev, unsigned int flags,
					resource_size_t *size,
					resource_size_t *align)
{
	resource_size_t start;
	struct resource *r;
	int i;

	pr_devel("  -> CDR %s\n", pci_name(dev));

	*size = *align = 0;

	/* Clear the resources out and mark them all unset */
	for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
		r = &dev->resource[i];
		if (!(r->flags & flags))
		    continue;
		if (r->start) {
			r->end -= r->start;
			r->start = 0;
		}
		r->flags |= IORESOURCE_UNSET;
	}

	/* We currently keep all memory resources together, we
	 * will handle prefetch & 64-bit separately in the future
	 * but for now we stick everybody in M32
	 */
	start = 0;
	for (;;) {
		resource_size_t max_size = 0;
		int max_no = -1;

		/* Find next biggest resource */
		for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
			r = &dev->resource[i];
			if (!(r->flags & IORESOURCE_UNSET) ||
			    !(r->flags & flags))
				continue;
			if (resource_size(r) > max_size) {
				max_size = resource_size(r);
				max_no = i;
			}
		}
		if (max_no < 0)
			break;
		r = &dev->resource[max_no];
		if (max_size > *align)
			*align = max_size;
		*size += max_size;
		r->start = start;
		start += max_size;
		r->end = r->start + max_size - 1;
		r->flags &= ~IORESOURCE_UNSET;
		pr_devel("  ->     R%d %016llx..%016llx\n",
			 max_no, r->start, r->end);
	}
	pr_devel("  <- CDR %s size=%llx align=%llx\n",
		 pci_name(dev), *size, *align);
}

/* Allocate a resource "wrap" for a given device or bridge and
 * insert it at the right position in the sorted list
 */
static void __devinit pnv_ioda_add_wrap(struct list_head *list,
					struct pci_bus *bus,
					struct pci_dev *dev,
					resource_size_t size,
					resource_size_t align)
{
	struct resource_wrap *w1, *w = kzalloc(sizeof(*w), GFP_KERNEL);

	w->size = size;
	w->align = align;
	w->dev = dev;
	w->bus = bus;

	list_for_each_entry(w1, list, link) {
		if (w1->align < align) {
			list_add_tail(&w->link, &w1->link);
			return;
		}
	}
	list_add_tail(&w->link, list);
}

/* Offset device resources of a given type */
static void __devinit pnv_ioda_offset_dev(struct pci_dev *dev,
					  unsigned int flags,
					  resource_size_t offset)
{
	struct resource *r;
	int i;

	pr_devel("  -> ODR %s [%x] +%016llx\n", pci_name(dev), flags, offset);

	for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
		r = &dev->resource[i];
		if (r->flags & flags) {
			dev->resource[i].start += offset;
			dev->resource[i].end += offset;
		}
	}

	pr_devel("  <- ODR %s [%x] +%016llx\n", pci_name(dev), flags, offset);
}

/* Offset bus resources (& all children) of a given type */
static void __devinit pnv_ioda_offset_bus(struct pci_bus *bus,
					  unsigned int flags,
					  resource_size_t offset)
{
	struct resource *r;
	struct pci_dev *dev;
	struct pci_bus *cbus;
	int i;

	pr_devel("  -> OBR %s [%x] +%016llx\n",
		 bus->self ? pci_name(bus->self) : "root", flags, offset);

	for (i = 0; i < 2; i++) {
		r = bus->resource[i];
		if (r && (r->flags & flags)) {
			bus->resource[i]->start += offset;
			bus->resource[i]->end += offset;
		}
	}
	list_for_each_entry(dev, &bus->devices, bus_list)
		pnv_ioda_offset_dev(dev, flags, offset);
	list_for_each_entry(cbus, &bus->children, node)
		pnv_ioda_offset_bus(cbus, flags, offset);

	pr_devel("  <- OBR %s [%x]\n",
		 bus->self ? pci_name(bus->self) : "root", flags);
}

/* This is the guts of our IODA resource allocation. This is called
 * recursively for each bus in the system. It calculates all the
 * necessary size and requirements for children and assign them
 * resources such that:
 *
 *   - Each function fits in it's own contiguous set of IO/M32
 *     segment
 *
 *   - All segments behind a P2P bridge are contiguous and obey
 *     alignment constraints of those bridges
 */
static void __devinit pnv_ioda_calc_bus(struct pci_bus *bus, unsigned int flags,
					resource_size_t *size,
					resource_size_t *align)
{
	struct pci_controller *hose = pci_bus_to_host(bus);
	struct pnv_phb *phb = hose->private_data;
	resource_size_t dev_size, dev_align, start;
	resource_size_t min_align, min_balign;
	struct pci_dev *cdev;
	struct pci_bus *cbus;
	struct list_head head;
	struct resource_wrap *w;
	unsigned int bres;

	*size = *align = 0;

	pr_devel("-> CBR %s [%x]\n",
		 bus->self ? pci_name(bus->self) : "root", flags);

	/* Calculate alignment requirements based on the type
	 * of resource we are working on
	 */
	if (flags & IORESOURCE_IO) {
		bres = 0;
		min_align = phb->ioda.io_segsize;
		min_balign = 0x1000;
	} else {
		bres = 1;
		min_align = phb->ioda.m32_segsize;
		min_balign = 0x100000;
	}

	/* Gather all our children resources ordered by alignment */
	INIT_LIST_HEAD(&head);

	/*   - Busses */
	list_for_each_entry(cbus, &bus->children, node) {
		pnv_ioda_calc_bus(cbus, flags, &dev_size, &dev_align);
		pnv_ioda_add_wrap(&head, cbus, NULL, dev_size, dev_align);
	}

	/*   - Devices */
	list_for_each_entry(cdev, &bus->devices, bus_list) {
		pnv_ioda_calc_dev(cdev, flags, &dev_size, &dev_align);
		/* Align them to segment size */
		if (dev_align < min_align)
			dev_align = min_align;
		pnv_ioda_add_wrap(&head, NULL, cdev, dev_size, dev_align);
	}
	if (list_empty(&head))
		goto empty;

	/* Now we can do two things: assign offsets to them within that
	 * level and get our total alignment & size requirements. The
	 * assignment algorithm is going to be uber-trivial for now, we
	 * can try to be smarter later at filling out holes.
	 */
	start = bus->self ? 0 : bus->resource[bres]->start;

	/* Don't hand out IO 0 */
	if ((flags & IORESOURCE_IO) && !bus->self)
		start += 0x1000;

	while(!list_empty(&head)) {
		w = list_first_entry(&head, struct resource_wrap, link);
		list_del(&w->link);
		if (w->size) {
			if (start) {
				start = ALIGN(start, w->align);
				if (w->dev)
					pnv_ioda_offset_dev(w->dev,flags,start);
				else if (w->bus)
					pnv_ioda_offset_bus(w->bus,flags,start);
			}
			if (w->align > *align)
				*align = w->align;
		}
		start += w->size;
		kfree(w);
	}
	*size = start;

	/* Align and setup bridge resources */
	*align = max_t(resource_size_t, *align,
		       max_t(resource_size_t, min_align, min_balign));
	*size = ALIGN(*size,
		      max_t(resource_size_t, min_align, min_balign));
 empty:
	/* Only setup P2P's, not the PHB itself */
	if (bus->self) {
		WARN_ON(bus->resource[bres] == NULL);
		bus->resource[bres]->start = 0;
		bus->resource[bres]->flags = (*size) ? flags : 0;
		bus->resource[bres]->end = (*size) ? (*size - 1) : 0;

		/* Clear prefetch bus resources for now */
		bus->resource[2]->flags = 0;
	}

	pr_devel("<- CBR %s [%x] *size=%016llx *align=%016llx\n",
		 bus->self ? pci_name(bus->self) : "root", flags,*size,*align);
}

static struct pci_dn *pnv_ioda_get_pdn(struct pci_dev *dev)
{
	struct device_node *np;

	np = pci_device_to_OF_node(dev);
	if (!np)
		return NULL;
	return PCI_DN(np);
}

static void __devinit pnv_ioda_setup_pe_segments(struct pci_dev *dev)
{
	struct pci_controller *hose = pci_bus_to_host(dev->bus);
	struct pnv_phb *phb = hose->private_data;
	struct pci_dn *pdn = pnv_ioda_get_pdn(dev);
	unsigned int pe, i;
	resource_size_t pos;
	struct resource io_res;
	struct resource m32_res;
	struct pci_bus_region region;
	int rc;

	/* Anything not referenced in the device-tree gets PE#0 */
	pe = pdn ? pdn->pe_number : 0;

	/* Calculate the device min/max */
	io_res.start = m32_res.start = (resource_size_t)-1;
	io_res.end = m32_res.end = 0;
	io_res.flags = IORESOURCE_IO;
	m32_res.flags = IORESOURCE_MEM;

	for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
		struct resource *r = NULL;
		if (dev->resource[i].flags & IORESOURCE_IO)
			r = &io_res;
		if (dev->resource[i].flags & IORESOURCE_MEM)
			r = &m32_res;
		if (!r)
			continue;
		if (dev->resource[i].start < r->start)
			r->start = dev->resource[i].start;
		if (dev->resource[i].end > r->end)
			r->end = dev->resource[i].end;
	}

	/* Setup IO segments */
	if (io_res.start < io_res.end) {
		pcibios_resource_to_bus(dev, &region, &io_res);
		pos = region.start;
		i = pos / phb->ioda.io_segsize;
		while(i < phb->ioda.total_pe && pos <= region.end) {
			if (phb->ioda.io_segmap[i]) {
				pr_err("%s: Trying to use IO seg #%d which is"
				       " already used by PE# %d\n",
				       pci_name(dev), i,
				       phb->ioda.io_segmap[i]);
				/* XXX DO SOMETHING TO DISABLE DEVICE ? */
				break;
			}
			phb->ioda.io_segmap[i] = pe;
			rc = opal_pci_map_pe_mmio_window(phb->opal_id, pe,
							 OPAL_IO_WINDOW_TYPE,
							 0, i);
			if (rc != OPAL_SUCCESS) {
				pr_err("%s: OPAL error %d setting up mapping"
				       " for IO seg# %d\n",
				       pci_name(dev), rc, i);
				/* XXX DO SOMETHING TO DISABLE DEVICE ? */
				break;
			}
			pos += phb->ioda.io_segsize;
			i++;
		};
	}

	/* Setup M32 segments */
	if (m32_res.start < m32_res.end) {
		pcibios_resource_to_bus(dev, &region, &m32_res);
		pos = region.start;
		i = pos / phb->ioda.m32_segsize;
		while(i < phb->ioda.total_pe && pos <= region.end) {
			if (phb->ioda.m32_segmap[i]) {
				pr_err("%s: Trying to use M32 seg #%d which is"
				       " already used by PE# %d\n",
				       pci_name(dev), i,
				       phb->ioda.m32_segmap[i]);
				/* XXX DO SOMETHING TO DISABLE DEVICE ? */
				break;
			}
			phb->ioda.m32_segmap[i] = pe;
			rc = opal_pci_map_pe_mmio_window(phb->opal_id, pe,
							 OPAL_M32_WINDOW_TYPE,
							 0, i);
			if (rc != OPAL_SUCCESS) {
				pr_err("%s: OPAL error %d setting up mapping"
				       " for M32 seg# %d\n",
				       pci_name(dev), rc, i);
				/* XXX DO SOMETHING TO DISABLE DEVICE ? */
				break;
			}
			pos += phb->ioda.m32_segsize;
			i++;
		}
	}
}

/* Check if a resource still fits in the total IO or M32 range
 * for a given PHB
 */
static int __devinit pnv_ioda_resource_fit(struct pci_controller *hose,
					   struct resource *r)
{
	struct resource *bounds;

	if (r->flags & IORESOURCE_IO)
		bounds = &hose->io_resource;
	else if (r->flags & IORESOURCE_MEM)
		bounds = &hose->mem_resources[0];
	else
		return 1;

	if (r->start >= bounds->start && r->end <= bounds->end)
		return 1;
	r->flags = 0;
	return 0;
}

static void __devinit pnv_ioda_update_resources(struct pci_bus *bus)
{
	struct pci_controller *hose = pci_bus_to_host(bus);
	struct pci_bus *cbus;
	struct pci_dev *cdev;
	unsigned int i;

	/* We used to clear all device enables here. However it looks like
	 * clearing MEM enable causes Obsidian (IPR SCS) to go bonkers,
	 * and shoot fatal errors to the PHB which in turns fences itself
	 * and we can't recover from that ... yet. So for now, let's leave
	 * the enables as-is and hope for the best.
	 */

	/* Check if bus resources fit in our IO or M32 range */
	for (i = 0; bus->self && (i < 2); i++) {
		struct resource *r = bus->resource[i];
		if (r && !pnv_ioda_resource_fit(hose, r))
			pr_err("%s: Bus %d resource %d disabled, no room\n",
			       pci_name(bus->self), bus->number, i);
	}

	/* Update self if it's not a PHB */
	if (bus->self)
		pci_setup_bridge(bus);

	/* Update child devices */
	list_for_each_entry(cdev, &bus->devices, bus_list) {
		/* Check if resource fits, if not, disabled it */
		for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
			struct resource *r = &cdev->resource[i];
			if (!pnv_ioda_resource_fit(hose, r))
				pr_err("%s: Resource %d disabled, no room\n",
				       pci_name(cdev), i);
		}

		/* Assign segments */
		pnv_ioda_setup_pe_segments(cdev);

		/* Update HW BARs */
		for (i = 0; i <= PCI_ROM_RESOURCE; i++)
			pci_update_resource(cdev, i);
	}

	/* Update child busses */
	list_for_each_entry(cbus, &bus->children, node)
		pnv_ioda_update_resources(cbus);
}

static int __devinit pnv_ioda_alloc_pe(struct pnv_phb *phb)
{
	unsigned long pe;

	do {
		pe = find_next_zero_bit(phb->ioda.pe_alloc,
					phb->ioda.total_pe, 0);
		if (pe >= phb->ioda.total_pe)
			return IODA_INVALID_PE;
	} while(test_and_set_bit(pe, phb->ioda.pe_alloc));

	phb->ioda.pe_array[pe].pe_number = pe;
	return pe;
}

static void __devinit pnv_ioda_free_pe(struct pnv_phb *phb, int pe)
{
	WARN_ON(phb->ioda.pe_array[pe].pdev);

	memset(&phb->ioda.pe_array[pe], 0, sizeof(struct pnv_ioda_pe));
	clear_bit(pe, phb->ioda.pe_alloc);
}

/* Currently those 2 are only used when MSIs are enabled, this will change
 * but in the meantime, we need to protect them to avoid warnings
 */
#ifdef CONFIG_PCI_MSI
static struct pnv_ioda_pe * __devinit __pnv_ioda_get_one_pe(struct pci_dev *dev)
{
	struct pci_controller *hose = pci_bus_to_host(dev->bus);
	struct pnv_phb *phb = hose->private_data;
	struct pci_dn *pdn = pnv_ioda_get_pdn(dev);

	if (!pdn)
		return NULL;
	if (pdn->pe_number == IODA_INVALID_PE)
		return NULL;
	return &phb->ioda.pe_array[pdn->pe_number];
}

static struct pnv_ioda_pe * __devinit pnv_ioda_get_pe(struct pci_dev *dev)
{
	struct pnv_ioda_pe *pe = __pnv_ioda_get_one_pe(dev);

	while (!pe && dev->bus->self) {
		dev = dev->bus->self;
		pe = __pnv_ioda_get_one_pe(dev);
		if (pe)
			pe = pe->bus_pe;
	}
	return pe;
}
#endif /* CONFIG_PCI_MSI */

static int __devinit pnv_ioda_configure_pe(struct pnv_phb *phb,
					   struct pnv_ioda_pe *pe)
{
	struct pci_dev *parent;
	uint8_t bcomp, dcomp, fcomp;
	long rc, rid_end, rid;

	/* Bus validation ? */
	if (pe->pbus) {
		int count;

		dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER;
		fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER;
		parent = pe->pbus->self;
		count = pe->pbus->subordinate - pe->pbus->secondary + 1;
		switch(count) {
		case  1: bcomp = OpalPciBusAll;		break;
		case  2: bcomp = OpalPciBus7Bits;	break;
		case  4: bcomp = OpalPciBus6Bits;	break;
		case  8: bcomp = OpalPciBus5Bits;	break;
		case 16: bcomp = OpalPciBus4Bits;	break;
		case 32: bcomp = OpalPciBus3Bits;	break;
		default:
			pr_err("%s: Number of subordinate busses %d"
			       " unsupported\n",
			       pci_name(pe->pbus->self), count);
			/* Do an exact match only */
			bcomp = OpalPciBusAll;
		}
		rid_end = pe->rid + (count << 8);
	} else {
		parent = pe->pdev->bus->self;
		bcomp = OpalPciBusAll;
		dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER;
		fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER;
		rid_end = pe->rid + 1;
	}

	/* Associate PE in PELT */
	rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid,
			     bcomp, dcomp, fcomp, OPAL_MAP_PE);
	if (rc) {
		pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc);
		return -ENXIO;
	}
	opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number,
				  OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);

	/* Add to all parents PELT-V */
	while (parent) {
		struct pci_dn *pdn = pnv_ioda_get_pdn(parent);
		if (pdn && pdn->pe_number != IODA_INVALID_PE) {
			rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number,
						pe->pe_number, OPAL_ADD_PE_TO_DOMAIN);
			/* XXX What to do in case of error ? */
		}
		parent = parent->bus->self;
	}
	/* Setup reverse map */
	for (rid = pe->rid; rid < rid_end; rid++)
		phb->ioda.pe_rmap[rid] = pe->pe_number;

	/* Setup one MVTs on IODA1 */
	if (phb->type == PNV_PHB_IODA1) {
		pe->mve_number = pe->pe_number;
		rc = opal_pci_set_mve(phb->opal_id, pe->mve_number,
				      pe->pe_number);
		if (rc) {
			pe_err(pe, "OPAL error %ld setting up MVE %d\n",
			       rc, pe->mve_number);
			pe->mve_number = -1;
		} else {
			rc = opal_pci_set_mve_enable(phb->opal_id,
						     pe->mve_number, OPAL_ENABLE_MVE);
			if (rc) {
				pe_err(pe, "OPAL error %ld enabling MVE %d\n",
				       rc, pe->mve_number);
				pe->mve_number = -1;
			}
		}
	} else if (phb->type == PNV_PHB_IODA2)
		pe->mve_number = 0;

	return 0;
}

static void __devinit pnv_ioda_link_pe_by_weight(struct pnv_phb *phb,
						 struct pnv_ioda_pe *pe)
{
	struct pnv_ioda_pe *lpe;

	list_for_each_entry(lpe, &phb->ioda.pe_list, link) {
		if (lpe->dma_weight < pe->dma_weight) {
			list_add_tail(&pe->link, &lpe->link);
			return;
		}
	}
	list_add_tail(&pe->link, &phb->ioda.pe_list);
}

static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev)
{
	/* This is quite simplistic. The "base" weight of a device
	 * is 10. 0 means no DMA is to be accounted for it.
	 */

	/* If it's a bridge, no DMA */
	if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL)
		return 0;

	/* Reduce the weight of slow USB controllers */
	if (dev->class == PCI_CLASS_SERIAL_USB_UHCI ||
	    dev->class == PCI_CLASS_SERIAL_USB_OHCI ||
	    dev->class == PCI_CLASS_SERIAL_USB_EHCI)
		return 3;

	/* Increase the weight of RAID (includes Obsidian) */
	if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID)
		return 15;

	/* Default */
	return 10;
}

static struct pnv_ioda_pe * __devinit pnv_ioda_setup_dev_PE(struct pci_dev *dev)
{
	struct pci_controller *hose = pci_bus_to_host(dev->bus);
	struct pnv_phb *phb = hose->private_data;
	struct pci_dn *pdn = pnv_ioda_get_pdn(dev);
	struct pnv_ioda_pe *pe;
	int pe_num;

	if (!pdn) {
		pr_err("%s: Device tree node not associated properly\n",
			   pci_name(dev));
		return NULL;
	}
	if (pdn->pe_number != IODA_INVALID_PE)
		return NULL;

	/* PE#0 has been pre-set */
	if (dev->bus->number == 0)
		pe_num = 0;
	else
		pe_num = pnv_ioda_alloc_pe(phb);
	if (pe_num == IODA_INVALID_PE) {
		pr_warning("%s: Not enough PE# available, disabling device\n",
			   pci_name(dev));
		return NULL;
	}

	/* NOTE: We get only one ref to the pci_dev for the pdn, not for the
	 * pointer in the PE data structure, both should be destroyed at the
	 * same time. However, this needs to be looked at more closely again
	 * once we actually start removing things (Hotplug, SR-IOV, ...)
	 *
	 * At some point we want to remove the PDN completely anyways
	 */
	pe = &phb->ioda.pe_array[pe_num];
	pci_dev_get(dev);
	pdn->pcidev = dev;
	pdn->pe_number = pe_num;
	pe->pdev = dev;
	pe->pbus = NULL;
	pe->tce32_seg = -1;
	pe->mve_number = -1;
	pe->rid = dev->bus->number << 8 | pdn->devfn;

	pe_info(pe, "Associated device to PE\n");

	if (pnv_ioda_configure_pe(phb, pe)) {
		/* XXX What do we do here ? */
		if (pe_num)
			pnv_ioda_free_pe(phb, pe_num);
		pdn->pe_number = IODA_INVALID_PE;
		pe->pdev = NULL;
		pci_dev_put(dev);
		return NULL;
	}

	/* Assign a DMA weight to the device */
	pe->dma_weight = pnv_ioda_dma_weight(dev);
	if (pe->dma_weight != 0) {
		phb->ioda.dma_weight += pe->dma_weight;
		phb->ioda.dma_pe_count++;
	}

	/* Link the PE */
	pnv_ioda_link_pe_by_weight(phb, pe);

	return pe;
}

static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe)
{
	struct pci_dev *dev;

	list_for_each_entry(dev, &bus->devices, bus_list) {
		struct pci_dn *pdn = pnv_ioda_get_pdn(dev);

		if (pdn == NULL) {
			pr_warn("%s: No device node associated with device !\n",
				pci_name(dev));
			continue;
		}
		pci_dev_get(dev);
		pdn->pcidev = dev;
		pdn->pe_number = pe->pe_number;
		pe->dma_weight += pnv_ioda_dma_weight(dev);
		if (dev->subordinate)
			pnv_ioda_setup_same_PE(dev->subordinate, pe);
	}
}

static void __devinit pnv_ioda_setup_bus_PE(struct pci_dev *dev,
					    struct pnv_ioda_pe *ppe)
{
	struct pci_controller *hose = pci_bus_to_host(dev->bus);
	struct pnv_phb *phb = hose->private_data;
	struct pci_bus *bus = dev->subordinate;
	struct pnv_ioda_pe *pe;
	int pe_num;

	if (!bus) {
		pr_warning("%s: Bridge without a subordinate bus !\n",
			   pci_name(dev));
		return;
	}
	pe_num = pnv_ioda_alloc_pe(phb);
	if (pe_num == IODA_INVALID_PE) {
		pr_warning("%s: Not enough PE# available, disabling bus\n",
			   pci_name(dev));
		return;
	}

	pe = &phb->ioda.pe_array[pe_num];
	ppe->bus_pe = pe;
	pe->pbus = bus;
	pe->pdev = NULL;
	pe->tce32_seg = -1;
	pe->mve_number = -1;
	pe->rid = bus->secondary << 8;
	pe->dma_weight = 0;

	pe_info(pe, "Secondary busses %d..%d associated with PE\n",
		bus->secondary, bus->subordinate);

	if (pnv_ioda_configure_pe(phb, pe)) {
		/* XXX What do we do here ? */
		if (pe_num)
			pnv_ioda_free_pe(phb, pe_num);
		pe->pbus = NULL;
		return;
	}

	/* Associate it with all child devices */
	pnv_ioda_setup_same_PE(bus, pe);

	/* Account for one DMA PE if at least one DMA capable device exist
	 * below the bridge
	 */
	if (pe->dma_weight != 0) {
		phb->ioda.dma_weight += pe->dma_weight;
		phb->ioda.dma_pe_count++;
	}

	/* Link the PE */
	pnv_ioda_link_pe_by_weight(phb, pe);
}

static void __devinit pnv_ioda_setup_PEs(struct pci_bus *bus)
{
	struct pci_dev *dev;
	struct pnv_ioda_pe *pe;

	list_for_each_entry(dev, &bus->devices, bus_list) {
		pe = pnv_ioda_setup_dev_PE(dev);
		if (pe == NULL)
			continue;
		/* Leaving the PCIe domain ... single PE# */
		if (dev->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE)
			pnv_ioda_setup_bus_PE(dev, pe);
		else if (dev->subordinate)
			pnv_ioda_setup_PEs(dev->subordinate);
	}
}

static void __devinit pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb,
						 struct pci_dev *dev)
{
	/* We delay DMA setup after we have assigned all PE# */
}

static void __devinit pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe,
					     struct pci_bus *bus)
{
	struct pci_dev *dev;

	list_for_each_entry(dev, &bus->devices, bus_list) {
		set_iommu_table_base(&dev->dev, &pe->tce32_table);
		if (dev->subordinate)
			pnv_ioda_setup_bus_dma(pe, dev->subordinate);
	}
}

static void __devinit pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
						struct pnv_ioda_pe *pe,
						unsigned int base,
						unsigned int segs)
{

	struct page *tce_mem = NULL;
	const __be64 *swinvp;
	struct iommu_table *tbl;
	unsigned int i;
	int64_t rc;
	void *addr;

	/* 256M DMA window, 4K TCE pages, 8 bytes TCE */
#define TCE32_TABLE_SIZE	((0x10000000 / 0x1000) * 8)

	/* XXX FIXME: Handle 64-bit only DMA devices */
	/* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */
	/* XXX FIXME: Allocate multi-level tables on PHB3 */

	/* We shouldn't already have a 32-bit DMA associated */
	if (WARN_ON(pe->tce32_seg >= 0))
		return;

	/* Grab a 32-bit TCE table */
	pe->tce32_seg = base;
	pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n",
		(base << 28), ((base + segs) << 28) - 1);

	/* XXX Currently, we allocate one big contiguous table for the
	 * TCEs. We only really need one chunk per 256M of TCE space
	 * (ie per segment) but that's an optimization for later, it
	 * requires some added smarts with our get/put_tce implementation
	 */
	tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL,
				   get_order(TCE32_TABLE_SIZE * segs));
	if (!tce_mem) {
		pe_err(pe, " Failed to allocate a 32-bit TCE memory\n");
		goto fail;
	}
	addr = page_address(tce_mem);
	memset(addr, 0, TCE32_TABLE_SIZE * segs);

	/* Configure HW */
	for (i = 0; i < segs; i++) {
		rc = opal_pci_map_pe_dma_window(phb->opal_id,
					      pe->pe_number,
					      base + i, 1,
					      __pa(addr) + TCE32_TABLE_SIZE * i,
					      TCE32_TABLE_SIZE, 0x1000);
		if (rc) {
			pe_err(pe, " Failed to configure 32-bit TCE table,"
			       " err %ld\n", rc);
			goto fail;
		}
	}

	/* Setup linux iommu table */
	tbl = &pe->tce32_table;
	pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs,
				  base << 28);

	/* OPAL variant of P7IOC SW invalidated TCEs */
	swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
	if (swinvp) {
		/* We need a couple more fields -- an address and a data
		 * to or.  Since the bus is only printed out on table free
		 * errors, and on the first pass the data will be a relative
		 * bus number, print that out instead.
		 */
		tbl->it_busno = 0;
		tbl->it_index = (unsigned long)ioremap(be64_to_cpup(swinvp), 8);
		tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE
			| TCE_PCI_SWINV_PAIR;
	}
	iommu_init_table(tbl, phb->hose->node);

	if (pe->pdev)
		set_iommu_table_base(&pe->pdev->dev, tbl);
	else
		pnv_ioda_setup_bus_dma(pe, pe->pbus);

	return;
 fail:
	/* XXX Failure: Try to fallback to 64-bit only ? */
	if (pe->tce32_seg >= 0)
		pe->tce32_seg = -1;
	if (tce_mem)
		__free_pages(tce_mem, get_order(TCE32_TABLE_SIZE * segs));
}

static void __devinit pnv_ioda_setup_dma(struct pnv_phb *phb)
{
	struct pci_controller *hose = phb->hose;
	unsigned int residual, remaining, segs, tw, base;
	struct pnv_ioda_pe *pe;

	/* If we have more PE# than segments available, hand out one
	 * per PE until we run out and let the rest fail. If not,
	 * then we assign at least one segment per PE, plus more based
	 * on the amount of devices under that PE
	 */
	if (phb->ioda.dma_pe_count > phb->ioda.tce32_count)
		residual = 0;
	else
		residual = phb->ioda.tce32_count -
			phb->ioda.dma_pe_count;

	pr_info("PCI: Domain %04x has %ld available 32-bit DMA segments\n",
		hose->global_number, phb->ioda.tce32_count);
	pr_info("PCI: %d PE# for a total weight of %d\n",
		phb->ioda.dma_pe_count, phb->ioda.dma_weight);

	/* Walk our PE list and configure their DMA segments, hand them
	 * out one base segment plus any residual segments based on
	 * weight
	 */
	remaining = phb->ioda.tce32_count;
	tw = phb->ioda.dma_weight;
	base = 0;
	list_for_each_entry(pe, &phb->ioda.pe_list, link) {
		if (!pe->dma_weight)
			continue;
		if (!remaining) {
			pe_warn(pe, "No DMA32 resources available\n");
			continue;
		}
		segs = 1;
		if (residual) {
			segs += ((pe->dma_weight * residual)  + (tw / 2)) / tw;
			if (segs > remaining)
				segs = remaining;
		}
		pe_info(pe, "DMA weight %d, assigned %d DMA32 segments\n",
			pe->dma_weight, segs);
		pnv_pci_ioda_setup_dma_pe(phb, pe, base, segs);
		remaining -= segs;
		base += segs;
	}
}

#ifdef CONFIG_PCI_MSI
static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev,
				  unsigned int hwirq, unsigned int is_64,
				  struct msi_msg *msg)
{
	struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev);
	unsigned int xive_num = hwirq - phb->msi_base;
	uint64_t addr64;
	uint32_t addr32, data;
	int rc;

	/* No PE assigned ? bail out ... no MSI for you ! */
	if (pe == NULL)
		return -ENXIO;

	/* Check if we have an MVE */
	if (pe->mve_number < 0)
		return -ENXIO;

	/* Assign XIVE to PE */
	rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num);
	if (rc) {
		pr_warn("%s: OPAL error %d setting XIVE %d PE\n",
			pci_name(dev), rc, xive_num);
		return -EIO;
	}

	if (is_64) {
		rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1,
				     &addr64, &data);
		if (rc) {
			pr_warn("%s: OPAL error %d getting 64-bit MSI data\n",
				pci_name(dev), rc);
			return -EIO;
		}
		msg->address_hi = addr64 >> 32;
		msg->address_lo = addr64 & 0xfffffffful;
	} else {
		rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1,
				     &addr32, &data);
		if (rc) {
			pr_warn("%s: OPAL error %d getting 32-bit MSI data\n",
				pci_name(dev), rc);
			return -EIO;
		}
		msg->address_hi = 0;
		msg->address_lo = addr32;
	}
	msg->data = data;

	pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d),"
		 " address=%x_%08x data=%x PE# %d\n",
		 pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num,
		 msg->address_hi, msg->address_lo, data, pe->pe_number);

	return 0;
}

static void pnv_pci_init_ioda_msis(struct pnv_phb *phb)
{
	unsigned int bmap_size;
	const __be32 *prop = of_get_property(phb->hose->dn,
					     "ibm,opal-msi-ranges", NULL);
	if (!prop) {
		/* BML Fallback */
		prop = of_get_property(phb->hose->dn, "msi-ranges", NULL);
	}
	if (!prop)
		return;

	phb->msi_base = be32_to_cpup(prop);
	phb->msi_count = be32_to_cpup(prop + 1);
	bmap_size = BITS_TO_LONGS(phb->msi_count) * sizeof(unsigned long);
	phb->msi_map = zalloc_maybe_bootmem(bmap_size, GFP_KERNEL);
	if (!phb->msi_map) {
		pr_err("PCI %d: Failed to allocate MSI bitmap !\n",
		       phb->hose->global_number);
		return;
	}
	phb->msi_setup = pnv_pci_ioda_msi_setup;
	phb->msi32_support = 1;
	pr_info("  Allocated bitmap for %d MSIs (base IRQ 0x%x)\n",
		phb->msi_count, phb->msi_base);
}
#else
static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { }
#endif /* CONFIG_PCI_MSI */

/* This is the starting point of our IODA specific resource
 * allocation process
 */
static void __devinit pnv_pci_ioda_fixup_phb(struct pci_controller *hose)
{
	resource_size_t size, align;
	struct pci_bus *child;

	/* Associate PEs per functions */
	pnv_ioda_setup_PEs(hose->bus);

	/* Calculate all resources */
	pnv_ioda_calc_bus(hose->bus, IORESOURCE_IO, &size, &align);
	pnv_ioda_calc_bus(hose->bus, IORESOURCE_MEM, &size, &align);

	/* Apply then to HW */
	pnv_ioda_update_resources(hose->bus);

	/* Setup DMA */
	pnv_ioda_setup_dma(hose->private_data);

	/* Configure PCI Express settings */
	list_for_each_entry(child, &hose->bus->children, node) {
		struct pci_dev *self = child->self;
		if (!self)
			continue;
		pcie_bus_configure_settings(child, self->pcie_mpss);
	}
}

/* Prevent enabling devices for which we couldn't properly
 * assign a PE
 */
static int __devinit pnv_pci_enable_device_hook(struct pci_dev *dev)
{
	struct pci_dn *pdn = pnv_ioda_get_pdn(dev);

	if (!pdn || pdn->pe_number == IODA_INVALID_PE)
		return -EINVAL;
	return 0;
}

static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus,
			       u32 devfn)
{
	return phb->ioda.pe_rmap[(bus->number << 8) | devfn];
}

void __init pnv_pci_init_ioda1_phb(struct device_node *np)
{
	struct pci_controller *hose;
	static int primary = 1;
	struct pnv_phb *phb;
	unsigned long size, m32map_off, iomap_off, pemap_off;
	const u64 *prop64;
	u64 phb_id;
	void *aux;
	long rc;

	pr_info(" Initializing IODA OPAL PHB %s\n", np->full_name);

	prop64 = of_get_property(np, "ibm,opal-phbid", NULL);
	if (!prop64) {
		pr_err("  Missing \"ibm,opal-phbid\" property !\n");
		return;
	}
	phb_id = be64_to_cpup(prop64);
	pr_debug("  PHB-ID  : 0x%016llx\n", phb_id);

	phb = alloc_bootmem(sizeof(struct pnv_phb));
	if (phb) {
		memset(phb, 0, sizeof(struct pnv_phb));
		phb->hose = hose = pcibios_alloc_controller(np);
	}
	if (!phb || !phb->hose) {
		pr_err("PCI: Failed to allocate PCI controller for %s\n",
		       np->full_name);
		return;
	}

	spin_lock_init(&phb->lock);
	/* XXX Use device-tree */
	hose->first_busno = 0;
	hose->last_busno = 0xff;
	hose->private_data = phb;
	phb->opal_id = phb_id;
	phb->type = PNV_PHB_IODA1;

	/* Detect specific models for error handling */
	if (of_device_is_compatible(np, "ibm,p7ioc-pciex"))
		phb->model = PNV_PHB_MODEL_P7IOC;
	else
		phb->model = PNV_PHB_MODEL_UNKNOWN;

	/* We parse "ranges" now since we need to deduce the register base
	 * from the IO base
	 */
	pci_process_bridge_OF_ranges(phb->hose, np, primary);
	primary = 0;

	/* Magic formula from Milton */
	phb->regs = of_iomap(np, 0);
	if (phb->regs == NULL)
		pr_err("  Failed to map registers !\n");


	/* XXX This is hack-a-thon. This needs to be changed so that:
	 *  - we obtain stuff like PE# etc... from device-tree
	 *  - we properly re-allocate M32 ourselves
	 *    (the OFW one isn't very good)
	 */

	/* Initialize more IODA stuff */
	phb->ioda.total_pe = 128;

	phb->ioda.m32_size = resource_size(&hose->mem_resources[0]);
	/* OFW Has already off top 64k of M32 space (MSI space) */
	phb->ioda.m32_size += 0x10000;

	phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe;
	phb->ioda.m32_pci_base = hose->mem_resources[0].start -
		hose->pci_mem_offset;
	phb->ioda.io_size = hose->pci_io_size;
	phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe;
	phb->ioda.io_pci_base = 0; /* XXX calculate this ? */

	/* Allocate aux data & arrays */
	size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long));
	m32map_off = size;
	size += phb->ioda.total_pe;
	iomap_off = size;
	size += phb->ioda.total_pe;
	pemap_off = size;
	size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe);
	aux = alloc_bootmem(size);
	memset(aux, 0, size);
	phb->ioda.pe_alloc = aux;
	phb->ioda.m32_segmap = aux + m32map_off;
	phb->ioda.io_segmap = aux + iomap_off;
	phb->ioda.pe_array = aux + pemap_off;
	set_bit(0, phb->ioda.pe_alloc);

	INIT_LIST_HEAD(&phb->ioda.pe_list);

	/* Calculate how many 32-bit TCE segments we have */
	phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28;

	/* Clear unusable m64 */
	hose->mem_resources[1].flags = 0;
	hose->mem_resources[1].start = 0;
	hose->mem_resources[1].end = 0;
	hose->mem_resources[2].flags = 0;
	hose->mem_resources[2].start = 0;
	hose->mem_resources[2].end = 0;

#if 0
	rc = opal_pci_set_phb_mem_window(opal->phb_id,
					 window_type,
					 window_num,
					 starting_real_address,
					 starting_pci_address,
					 segment_size);
#endif

	pr_info("  %d PE's M32: 0x%x [segment=0x%x] IO: 0x%x [segment=0x%x]\n",
		phb->ioda.total_pe,
		phb->ioda.m32_size, phb->ioda.m32_segsize,
		phb->ioda.io_size, phb->ioda.io_segsize);

	if (phb->regs)  {
		pr_devel(" BUID     = 0x%016llx\n", in_be64(phb->regs + 0x100));
		pr_devel(" PHB2_CR  = 0x%016llx\n", in_be64(phb->regs + 0x160));
		pr_devel(" IO_BAR   = 0x%016llx\n", in_be64(phb->regs + 0x170));
		pr_devel(" IO_BAMR  = 0x%016llx\n", in_be64(phb->regs + 0x178));
		pr_devel(" IO_SAR   = 0x%016llx\n", in_be64(phb->regs + 0x180));
		pr_devel(" M32_BAR  = 0x%016llx\n", in_be64(phb->regs + 0x190));
		pr_devel(" M32_BAMR = 0x%016llx\n", in_be64(phb->regs + 0x198));
		pr_devel(" M32_SAR  = 0x%016llx\n", in_be64(phb->regs + 0x1a0));
	}
	phb->hose->ops = &pnv_pci_ops;

	/* Setup RID -> PE mapping function */
	phb->bdfn_to_pe = pnv_ioda_bdfn_to_pe;

	/* Setup TCEs */
	phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup;

	/* Setup MSI support */
	pnv_pci_init_ioda_msis(phb);

	/* We set both probe_only and PCI_REASSIGN_ALL_RSRC. This is an
	 * odd combination which essentially means that we skip all resource
	 * fixups and assignments in the generic code, and do it all
	 * ourselves here
	 */
	pci_probe_only = 1;
	ppc_md.pcibios_fixup_phb = pnv_pci_ioda_fixup_phb;
	ppc_md.pcibios_enable_device_hook = pnv_pci_enable_device_hook;
	pci_add_flags(PCI_REASSIGN_ALL_RSRC);

	/* Reset IODA tables to a clean state */
	rc = opal_pci_reset(phb_id, OPAL_PCI_IODA_TABLE_RESET, OPAL_ASSERT_RESET);
	if (rc)
		pr_warning("  OPAL Error %ld performing IODA table reset !\n", rc);
	opal_pci_set_pe(phb_id, 0, 0, 7, 1, 1 , OPAL_MAP_PE);
}

void __init pnv_pci_init_ioda_hub(struct device_node *np)
{
	struct device_node *phbn;
	const u64 *prop64;
	u64 hub_id;

	pr_info("Probing IODA IO-Hub %s\n", np->full_name);

	prop64 = of_get_property(np, "ibm,opal-hubid", NULL);
	if (!prop64) {
		pr_err(" Missing \"ibm,opal-hubid\" property !\n");
		return;
	}
	hub_id = be64_to_cpup(prop64);
	pr_devel(" HUB-ID : 0x%016llx\n", hub_id);

	/* Count child PHBs */
	for_each_child_of_node(np, phbn) {
		/* Look for IODA1 PHBs */
		if (of_device_is_compatible(phbn, "ibm,ioda-phb"))
			pnv_pci_init_ioda1_phb(phbn);
	}
}