summaryrefslogtreecommitdiff
path: root/drivers/pci/hotplug/ibmphp_res.c
blob: 4a72ade2cddb4c351bc5b86b72dec114859fad50 (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
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
// SPDX-License-Identifier: GPL-2.0+
/*
 * IBM Hot Plug Controller Driver
 *
 * Written By: Irene Zubarev, IBM Corporation
 *
 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001,2002 IBM Corp.
 *
 * All rights reserved.
 *
 * Send feedback to <gregkh@us.ibm.com>
 *
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/init.h>
#include "ibmphp.h"

static int flags = 0;		/* for testing */

static void update_resources(struct bus_node *bus_cur, int type, int rangeno);
static int once_over(void);
static int remove_ranges(struct bus_node *, struct bus_node *);
static int update_bridge_ranges(struct bus_node **);
static int add_bus_range(int type, struct range_node *, struct bus_node *);
static void fix_resources(struct bus_node *);
static struct bus_node *find_bus_wprev(u8, struct bus_node **, u8);

static LIST_HEAD(gbuses);

static struct bus_node * __init alloc_error_bus(struct ebda_pci_rsrc *curr, u8 busno, int flag)
{
	struct bus_node *newbus;

	if (!(curr) && !(flag)) {
		err("NULL pointer passed\n");
		return NULL;
	}

	newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL);
	if (!newbus)
		return NULL;

	if (flag)
		newbus->busno = busno;
	else
		newbus->busno = curr->bus_num;
	list_add_tail(&newbus->bus_list, &gbuses);
	return newbus;
}

static struct resource_node * __init alloc_resources(struct ebda_pci_rsrc *curr)
{
	struct resource_node *rs;

	if (!curr) {
		err("NULL passed to allocate\n");
		return NULL;
	}

	rs = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
	if (!rs)
		return NULL;

	rs->busno = curr->bus_num;
	rs->devfunc = curr->dev_fun;
	rs->start = curr->start_addr;
	rs->end = curr->end_addr;
	rs->len = curr->end_addr - curr->start_addr + 1;
	return rs;
}

static int __init alloc_bus_range(struct bus_node **new_bus, struct range_node **new_range, struct ebda_pci_rsrc *curr, int flag, u8 first_bus)
{
	struct bus_node *newbus;
	struct range_node *newrange;
	u8 num_ranges = 0;

	if (first_bus) {
		newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL);
		if (!newbus)
			return -ENOMEM;

		newbus->busno = curr->bus_num;
	} else {
		newbus = *new_bus;
		switch (flag) {
			case MEM:
				num_ranges = newbus->noMemRanges;
				break;
			case PFMEM:
				num_ranges = newbus->noPFMemRanges;
				break;
			case IO:
				num_ranges = newbus->noIORanges;
				break;
		}
	}

	newrange = kzalloc(sizeof(struct range_node), GFP_KERNEL);
	if (!newrange) {
		if (first_bus)
			kfree(newbus);
		return -ENOMEM;
	}
	newrange->start = curr->start_addr;
	newrange->end = curr->end_addr;

	if (first_bus || (!num_ranges))
		newrange->rangeno = 1;
	else {
		/* need to insert our range */
		add_bus_range(flag, newrange, newbus);
		debug("%d resource Primary Bus inserted on bus %x [%x - %x]\n", flag, newbus->busno, newrange->start, newrange->end);
	}

	switch (flag) {
		case MEM:
			newbus->rangeMem = newrange;
			if (first_bus)
				newbus->noMemRanges = 1;
			else {
				debug("First Memory Primary on bus %x, [%x - %x]\n", newbus->busno, newrange->start, newrange->end);
				++newbus->noMemRanges;
				fix_resources(newbus);
			}
			break;
		case IO:
			newbus->rangeIO = newrange;
			if (first_bus)
				newbus->noIORanges = 1;
			else {
				debug("First IO Primary on bus %x, [%x - %x]\n", newbus->busno, newrange->start, newrange->end);
				++newbus->noIORanges;
				fix_resources(newbus);
			}
			break;
		case PFMEM:
			newbus->rangePFMem = newrange;
			if (first_bus)
				newbus->noPFMemRanges = 1;
			else {
				debug("1st PFMemory Primary on Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end);
				++newbus->noPFMemRanges;
				fix_resources(newbus);
			}

			break;
	}

	*new_bus = newbus;
	*new_range = newrange;
	return 0;
}


/* Notes:
 * 1. The ranges are ordered.  The buses are not ordered.  (First come)
 *
 * 2. If cannot allocate out of PFMem range, allocate from Mem ranges.  PFmemFromMem
 * are not sorted. (no need since use mem node). To not change the entire code, we
 * also add mem node whenever this case happens so as not to change
 * ibmphp_check_mem_resource etc(and since it really is taking Mem resource)
 */

/*****************************************************************************
 * This is the Resource Management initialization function.  It will go through
 * the Resource list taken from EBDA and fill in this module's data structures
 *
 * THIS IS NOT TAKING INTO CONSIDERATION IO RESTRICTIONS OF PRIMARY BUSES,
 * SINCE WE'RE GOING TO ASSUME FOR NOW WE DON'T HAVE THOSE ON OUR BUSES FOR NOW
 *
 * Input: ptr to the head of the resource list from EBDA
 * Output: 0, -1 or error codes
 ***************************************************************************/
int __init ibmphp_rsrc_init(void)
{
	struct ebda_pci_rsrc *curr;
	struct range_node *newrange = NULL;
	struct bus_node *newbus = NULL;
	struct bus_node *bus_cur;
	struct bus_node *bus_prev;
	struct resource_node *new_io = NULL;
	struct resource_node *new_mem = NULL;
	struct resource_node *new_pfmem = NULL;
	int rc;

	list_for_each_entry(curr, &ibmphp_ebda_pci_rsrc_head,
			    ebda_pci_rsrc_list) {
		if (!(curr->rsrc_type & PCIDEVMASK)) {
			/* EBDA still lists non PCI devices, so ignore... */
			debug("this is not a PCI DEVICE in rsrc_init, please take care\n");
			// continue;
		}

		/* this is a primary bus resource */
		if (curr->rsrc_type & PRIMARYBUSMASK) {
			/* memory */
			if ((curr->rsrc_type & RESTYPE) == MMASK) {
				/* no bus structure exists in place yet */
				if (list_empty(&gbuses)) {
					rc = alloc_bus_range(&newbus, &newrange, curr, MEM, 1);
					if (rc)
						return rc;
					list_add_tail(&newbus->bus_list, &gbuses);
					debug("gbuses = NULL, Memory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end);
				} else {
					bus_cur = find_bus_wprev(curr->bus_num, &bus_prev, 1);
					/* found our bus */
					if (bus_cur) {
						rc = alloc_bus_range(&bus_cur, &newrange, curr, MEM, 0);
						if (rc)
							return rc;
					} else {
						/* went through all the buses and didn't find ours, need to create a new bus node */
						rc = alloc_bus_range(&newbus, &newrange, curr, MEM, 1);
						if (rc)
							return rc;

						list_add_tail(&newbus->bus_list, &gbuses);
						debug("New Bus, Memory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end);
					}
				}
			} else if ((curr->rsrc_type & RESTYPE) == PFMASK) {
				/* prefetchable memory */
				if (list_empty(&gbuses)) {
					/* no bus structure exists in place yet */
					rc = alloc_bus_range(&newbus, &newrange, curr, PFMEM, 1);
					if (rc)
						return rc;
					list_add_tail(&newbus->bus_list, &gbuses);
					debug("gbuses = NULL, PFMemory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end);
				} else {
					bus_cur = find_bus_wprev(curr->bus_num, &bus_prev, 1);
					if (bus_cur) {
						/* found our bus */
						rc = alloc_bus_range(&bus_cur, &newrange, curr, PFMEM, 0);
						if (rc)
							return rc;
					} else {
						/* went through all the buses and didn't find ours, need to create a new bus node */
						rc = alloc_bus_range(&newbus, &newrange, curr, PFMEM, 1);
						if (rc)
							return rc;
						list_add_tail(&newbus->bus_list, &gbuses);
						debug("1st Bus, PFMemory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end);
					}
				}
			} else if ((curr->rsrc_type & RESTYPE) == IOMASK) {
				/* IO */
				if (list_empty(&gbuses)) {
					/* no bus structure exists in place yet */
					rc = alloc_bus_range(&newbus, &newrange, curr, IO, 1);
					if (rc)
						return rc;
					list_add_tail(&newbus->bus_list, &gbuses);
					debug("gbuses = NULL, IO Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end);
				} else {
					bus_cur = find_bus_wprev(curr->bus_num, &bus_prev, 1);
					if (bus_cur) {
						rc = alloc_bus_range(&bus_cur, &newrange, curr, IO, 0);
						if (rc)
							return rc;
					} else {
						/* went through all the buses and didn't find ours, need to create a new bus node */
						rc = alloc_bus_range(&newbus, &newrange, curr, IO, 1);
						if (rc)
							return rc;
						list_add_tail(&newbus->bus_list, &gbuses);
						debug("1st Bus, IO Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end);
					}
				}

			} else {
				;	/* type is reserved  WHAT TO DO IN THIS CASE???
					   NOTHING TO DO??? */
			}
		} else {
			/* regular pci device resource */
			if ((curr->rsrc_type & RESTYPE) == MMASK) {
				/* Memory resource */
				new_mem = alloc_resources(curr);
				if (!new_mem)
					return -ENOMEM;
				new_mem->type = MEM;
				/*
				 * if it didn't find the bus, means PCI dev
				 * came b4 the Primary Bus info, so need to
				 * create a bus rangeno becomes a problem...
				 * assign a -1 and then update once the range
				 * actually appears...
				 */
				if (ibmphp_add_resource(new_mem) < 0) {
					newbus = alloc_error_bus(curr, 0, 0);
					if (!newbus)
						return -ENOMEM;
					newbus->firstMem = new_mem;
					++newbus->needMemUpdate;
					new_mem->rangeno = -1;
				}
				debug("Memory resource for device %x, bus %x, [%x - %x]\n", new_mem->devfunc, new_mem->busno, new_mem->start, new_mem->end);

			} else if ((curr->rsrc_type & RESTYPE) == PFMASK) {
				/* PFMemory resource */
				new_pfmem = alloc_resources(curr);
				if (!new_pfmem)
					return -ENOMEM;
				new_pfmem->type = PFMEM;
				new_pfmem->fromMem = 0;
				if (ibmphp_add_resource(new_pfmem) < 0) {
					newbus = alloc_error_bus(curr, 0, 0);
					if (!newbus)
						return -ENOMEM;
					newbus->firstPFMem = new_pfmem;
					++newbus->needPFMemUpdate;
					new_pfmem->rangeno = -1;
				}

				debug("PFMemory resource for device %x, bus %x, [%x - %x]\n", new_pfmem->devfunc, new_pfmem->busno, new_pfmem->start, new_pfmem->end);
			} else if ((curr->rsrc_type & RESTYPE) == IOMASK) {
				/* IO resource */
				new_io = alloc_resources(curr);
				if (!new_io)
					return -ENOMEM;
				new_io->type = IO;

				/*
				 * if it didn't find the bus, means PCI dev
				 * came b4 the Primary Bus info, so need to
				 * create a bus rangeno becomes a problem...
				 * Can assign a -1 and then update once the
				 * range actually appears...
				 */
				if (ibmphp_add_resource(new_io) < 0) {
					newbus = alloc_error_bus(curr, 0, 0);
					if (!newbus)
						return -ENOMEM;
					newbus->firstIO = new_io;
					++newbus->needIOUpdate;
					new_io->rangeno = -1;
				}
				debug("IO resource for device %x, bus %x, [%x - %x]\n", new_io->devfunc, new_io->busno, new_io->start, new_io->end);
			}
		}
	}

	list_for_each_entry(bus_cur, &gbuses, bus_list) {
		/* This is to get info about PPB resources, since EBDA doesn't put this info into the primary bus info */
		rc = update_bridge_ranges(&bus_cur);
		if (rc)
			return rc;
	}
	return once_over();	/* This is to align ranges (so no -1) */
}

/********************************************************************************
 * This function adds a range into a sorted list of ranges per bus for a particular
 * range type, it then calls another routine to update the range numbers on the
 * pci devices' resources for the appropriate resource
 *
 * Input: type of the resource, range to add, current bus
 * Output: 0 or -1, bus and range ptrs
 ********************************************************************************/
static int add_bus_range(int type, struct range_node *range, struct bus_node *bus_cur)
{
	struct range_node *range_cur = NULL;
	struct range_node *range_prev;
	int count = 0, i_init;
	int noRanges = 0;

	switch (type) {
		case MEM:
			range_cur = bus_cur->rangeMem;
			noRanges = bus_cur->noMemRanges;
			break;
		case PFMEM:
			range_cur = bus_cur->rangePFMem;
			noRanges = bus_cur->noPFMemRanges;
			break;
		case IO:
			range_cur = bus_cur->rangeIO;
			noRanges = bus_cur->noIORanges;
			break;
	}

	range_prev = NULL;
	while (range_cur) {
		if (range->start < range_cur->start)
			break;
		range_prev = range_cur;
		range_cur = range_cur->next;
		count = count + 1;
	}
	if (!count) {
		/* our range will go at the beginning of the list */
		switch (type) {
			case MEM:
				bus_cur->rangeMem = range;
				break;
			case PFMEM:
				bus_cur->rangePFMem = range;
				break;
			case IO:
				bus_cur->rangeIO = range;
				break;
		}
		range->next = range_cur;
		range->rangeno = 1;
		i_init = 0;
	} else if (!range_cur) {
		/* our range will go at the end of the list */
		range->next = NULL;
		range_prev->next = range;
		range->rangeno = range_prev->rangeno + 1;
		return 0;
	} else {
		/* the range is in the middle */
		range_prev->next = range;
		range->next = range_cur;
		range->rangeno = range_cur->rangeno;
		i_init = range_prev->rangeno;
	}

	for (count = i_init; count < noRanges; ++count) {
		++range_cur->rangeno;
		range_cur = range_cur->next;
	}

	update_resources(bus_cur, type, i_init + 1);
	return 0;
}

/*******************************************************************************
 * This routine goes through the list of resources of type 'type' and updates
 * the range numbers that they correspond to.  It was called from add_bus_range fnc
 *
 * Input: bus, type of the resource, the rangeno starting from which to update
 ******************************************************************************/
static void update_resources(struct bus_node *bus_cur, int type, int rangeno)
{
	struct resource_node *res = NULL;
	u8 eol = 0;	/* end of list indicator */

	switch (type) {
		case MEM:
			if (bus_cur->firstMem)
				res = bus_cur->firstMem;
			break;
		case PFMEM:
			if (bus_cur->firstPFMem)
				res = bus_cur->firstPFMem;
			break;
		case IO:
			if (bus_cur->firstIO)
				res = bus_cur->firstIO;
			break;
	}

	if (res) {
		while (res) {
			if (res->rangeno == rangeno)
				break;
			if (res->next)
				res = res->next;
			else if (res->nextRange)
				res = res->nextRange;
			else {
				eol = 1;
				break;
			}
		}

		if (!eol) {
			/* found the range */
			while (res) {
				++res->rangeno;
				res = res->next;
			}
		}
	}
}

static void fix_me(struct resource_node *res, struct bus_node *bus_cur, struct range_node *range)
{
	char *str = "";
	switch (res->type) {
		case IO:
			str = "io";
			break;
		case MEM:
			str = "mem";
			break;
		case PFMEM:
			str = "pfmem";
			break;
	}

	while (res) {
		if (res->rangeno == -1) {
			while (range) {
				if ((res->start >= range->start) && (res->end <= range->end)) {
					res->rangeno = range->rangeno;
					debug("%s->rangeno in fix_resources is %d\n", str, res->rangeno);
					switch (res->type) {
						case IO:
							--bus_cur->needIOUpdate;
							break;
						case MEM:
							--bus_cur->needMemUpdate;
							break;
						case PFMEM:
							--bus_cur->needPFMemUpdate;
							break;
					}
					break;
				}
				range = range->next;
			}
		}
		if (res->next)
			res = res->next;
		else
			res = res->nextRange;
	}

}

/*****************************************************************************
 * This routine reassigns the range numbers to the resources that had a -1
 * This case can happen only if upon initialization, resources taken by pci dev
 * appear in EBDA before the resources allocated for that bus, since we don't
 * know the range, we assign -1, and this routine is called after a new range
 * is assigned to see the resources with unknown range belong to the added range
 *
 * Input: current bus
 * Output: none, list of resources for that bus are fixed if can be
 *******************************************************************************/
static void fix_resources(struct bus_node *bus_cur)
{
	struct range_node *range;
	struct resource_node *res;

	debug("%s - bus_cur->busno = %d\n", __func__, bus_cur->busno);

	if (bus_cur->needIOUpdate) {
		res = bus_cur->firstIO;
		range = bus_cur->rangeIO;
		fix_me(res, bus_cur, range);
	}
	if (bus_cur->needMemUpdate) {
		res = bus_cur->firstMem;
		range = bus_cur->rangeMem;
		fix_me(res, bus_cur, range);
	}
	if (bus_cur->needPFMemUpdate) {
		res = bus_cur->firstPFMem;
		range = bus_cur->rangePFMem;
		fix_me(res, bus_cur, range);
	}
}

/*******************************************************************************
 * This routine adds a resource to the list of resources to the appropriate bus
 * based on their resource type and sorted by their starting addresses.  It assigns
 * the ptrs to next and nextRange if needed.
 *
 * Input: resource ptr
 * Output: ptrs assigned (to the node)
 * 0 or -1
 *******************************************************************************/
int ibmphp_add_resource(struct resource_node *res)
{
	struct resource_node *res_cur;
	struct resource_node *res_prev;
	struct bus_node *bus_cur;
	struct range_node *range_cur = NULL;
	struct resource_node *res_start = NULL;

	debug("%s - enter\n", __func__);

	if (!res) {
		err("NULL passed to add\n");
		return -ENODEV;
	}

	bus_cur = find_bus_wprev(res->busno, NULL, 0);

	if (!bus_cur) {
		/* didn't find a bus, something's wrong!!! */
		debug("no bus in the system, either pci_dev's wrong or allocation failed\n");
		return -ENODEV;
	}

	/* Normal case */
	switch (res->type) {
		case IO:
			range_cur = bus_cur->rangeIO;
			res_start = bus_cur->firstIO;
			break;
		case MEM:
			range_cur = bus_cur->rangeMem;
			res_start = bus_cur->firstMem;
			break;
		case PFMEM:
			range_cur = bus_cur->rangePFMem;
			res_start = bus_cur->firstPFMem;
			break;
		default:
			err("cannot read the type of the resource to add... problem\n");
			return -EINVAL;
	}
	while (range_cur) {
		if ((res->start >= range_cur->start) && (res->end <= range_cur->end)) {
			res->rangeno = range_cur->rangeno;
			break;
		}
		range_cur = range_cur->next;
	}

	/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
	 * this is again the case of rangeno = -1
	 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
	 */

	if (!range_cur) {
		switch (res->type) {
			case IO:
				++bus_cur->needIOUpdate;
				break;
			case MEM:
				++bus_cur->needMemUpdate;
				break;
			case PFMEM:
				++bus_cur->needPFMemUpdate;
				break;
		}
		res->rangeno = -1;
	}

	debug("The range is %d\n", res->rangeno);
	if (!res_start) {
		/* no first{IO,Mem,Pfmem} on the bus, 1st IO/Mem/Pfmem resource ever */
		switch (res->type) {
			case IO:
				bus_cur->firstIO = res;
				break;
			case MEM:
				bus_cur->firstMem = res;
				break;
			case PFMEM:
				bus_cur->firstPFMem = res;
				break;
		}
		res->next = NULL;
		res->nextRange = NULL;
	} else {
		res_cur = res_start;
		res_prev = NULL;

		debug("res_cur->rangeno is %d\n", res_cur->rangeno);

		while (res_cur) {
			if (res_cur->rangeno >= res->rangeno)
				break;
			res_prev = res_cur;
			if (res_cur->next)
				res_cur = res_cur->next;
			else
				res_cur = res_cur->nextRange;
		}

		if (!res_cur) {
			/* at the end of the resource list */
			debug("i should be here, [%x - %x]\n", res->start, res->end);
			res_prev->nextRange = res;
			res->next = NULL;
			res->nextRange = NULL;
		} else if (res_cur->rangeno == res->rangeno) {
			/* in the same range */
			while (res_cur) {
				if (res->start < res_cur->start)
					break;
				res_prev = res_cur;
				res_cur = res_cur->next;
			}
			if (!res_cur) {
				/* the last resource in this range */
				res_prev->next = res;
				res->next = NULL;
				res->nextRange = res_prev->nextRange;
				res_prev->nextRange = NULL;
			} else if (res->start < res_cur->start) {
				/* at the beginning or middle of the range */
				if (!res_prev)	{
					switch (res->type) {
						case IO:
							bus_cur->firstIO = res;
							break;
						case MEM:
							bus_cur->firstMem = res;
							break;
						case PFMEM:
							bus_cur->firstPFMem = res;
							break;
					}
				} else if (res_prev->rangeno == res_cur->rangeno)
					res_prev->next = res;
				else
					res_prev->nextRange = res;

				res->next = res_cur;
				res->nextRange = NULL;
			}
		} else {
			/* this is the case where it is 1st occurrence of the range */
			if (!res_prev) {
				/* at the beginning of the resource list */
				res->next = NULL;
				switch (res->type) {
					case IO:
						res->nextRange = bus_cur->firstIO;
						bus_cur->firstIO = res;
						break;
					case MEM:
						res->nextRange = bus_cur->firstMem;
						bus_cur->firstMem = res;
						break;
					case PFMEM:
						res->nextRange = bus_cur->firstPFMem;
						bus_cur->firstPFMem = res;
						break;
				}
			} else if (res_cur->rangeno > res->rangeno) {
				/* in the middle of the resource list */
				res_prev->nextRange = res;
				res->next = NULL;
				res->nextRange = res_cur;
			}
		}
	}

	debug("%s - exit\n", __func__);
	return 0;
}

/****************************************************************************
 * This routine will remove the resource from the list of resources
 *
 * Input: io, mem, and/or pfmem resource to be deleted
 * Output: modified resource list
 *        0 or error code
 ****************************************************************************/
int ibmphp_remove_resource(struct resource_node *res)
{
	struct bus_node *bus_cur;
	struct resource_node *res_cur = NULL;
	struct resource_node *res_prev;
	struct resource_node *mem_cur;
	char *type = "";

	if (!res)  {
		err("resource to remove is NULL\n");
		return -ENODEV;
	}

	bus_cur = find_bus_wprev(res->busno, NULL, 0);

	if (!bus_cur) {
		err("cannot find corresponding bus of the io resource to remove  bailing out...\n");
		return -ENODEV;
	}

	switch (res->type) {
		case IO:
			res_cur = bus_cur->firstIO;
			type = "io";
			break;
		case MEM:
			res_cur = bus_cur->firstMem;
			type = "mem";
			break;
		case PFMEM:
			res_cur = bus_cur->firstPFMem;
			type = "pfmem";
			break;
		default:
			err("unknown type for resource to remove\n");
			return -EINVAL;
	}
	res_prev = NULL;

	while (res_cur) {
		if ((res_cur->start == res->start) && (res_cur->end == res->end))
			break;
		res_prev = res_cur;
		if (res_cur->next)
			res_cur = res_cur->next;
		else
			res_cur = res_cur->nextRange;
	}

	if (!res_cur) {
		if (res->type == PFMEM) {
			/*
			 * case where pfmem might be in the PFMemFromMem list
			 * so will also need to remove the corresponding mem
			 * entry
			 */
			res_cur = bus_cur->firstPFMemFromMem;
			res_prev = NULL;

			while (res_cur) {
				if ((res_cur->start == res->start) && (res_cur->end == res->end)) {
					mem_cur = bus_cur->firstMem;
					while (mem_cur) {
						if ((mem_cur->start == res_cur->start)
						    && (mem_cur->end == res_cur->end))
							break;
						if (mem_cur->next)
							mem_cur = mem_cur->next;
						else
							mem_cur = mem_cur->nextRange;
					}
					if (!mem_cur) {
						err("cannot find corresponding mem node for pfmem...\n");
						return -EINVAL;
					}

					ibmphp_remove_resource(mem_cur);
					if (!res_prev)
						bus_cur->firstPFMemFromMem = res_cur->next;
					else
						res_prev->next = res_cur->next;
					kfree(res_cur);
					return 0;
				}
				res_prev = res_cur;
				if (res_cur->next)
					res_cur = res_cur->next;
				else
					res_cur = res_cur->nextRange;
			}
			if (!res_cur) {
				err("cannot find pfmem to delete...\n");
				return -EINVAL;
			}
		} else {
			err("the %s resource is not in the list to be deleted...\n", type);
			return -EINVAL;
		}
	}
	if (!res_prev) {
		/* first device to be deleted */
		if (res_cur->next) {
			switch (res->type) {
				case IO:
					bus_cur->firstIO = res_cur->next;
					break;
				case MEM:
					bus_cur->firstMem = res_cur->next;
					break;
				case PFMEM:
					bus_cur->firstPFMem = res_cur->next;
					break;
			}
		} else if (res_cur->nextRange) {
			switch (res->type) {
				case IO:
					bus_cur->firstIO = res_cur->nextRange;
					break;
				case MEM:
					bus_cur->firstMem = res_cur->nextRange;
					break;
				case PFMEM:
					bus_cur->firstPFMem = res_cur->nextRange;
					break;
			}
		} else {
			switch (res->type) {
				case IO:
					bus_cur->firstIO = NULL;
					break;
				case MEM:
					bus_cur->firstMem = NULL;
					break;
				case PFMEM:
					bus_cur->firstPFMem = NULL;
					break;
			}
		}
		kfree(res_cur);
		return 0;
	} else {
		if (res_cur->next) {
			if (res_prev->rangeno == res_cur->rangeno)
				res_prev->next = res_cur->next;
			else
				res_prev->nextRange = res_cur->next;
		} else if (res_cur->nextRange) {
			res_prev->next = NULL;
			res_prev->nextRange = res_cur->nextRange;
		} else {
			res_prev->next = NULL;
			res_prev->nextRange = NULL;
		}
		kfree(res_cur);
		return 0;
	}

	return 0;
}

static struct range_node *find_range(struct bus_node *bus_cur, struct resource_node *res)
{
	struct range_node *range = NULL;

	switch (res->type) {
		case IO:
			range = bus_cur->rangeIO;
			break;
		case MEM:
			range = bus_cur->rangeMem;
			break;
		case PFMEM:
			range = bus_cur->rangePFMem;
			break;
		default:
			err("cannot read resource type in find_range\n");
	}

	while (range) {
		if (res->rangeno == range->rangeno)
			break;
		range = range->next;
	}
	return range;
}

/*****************************************************************************
 * This routine will check to make sure the io/mem/pfmem->len that the device asked for
 * can fit w/i our list of available IO/MEM/PFMEM resources.  If cannot, returns -EINVAL,
 * otherwise, returns 0
 *
 * Input: resource
 * Output: the correct start and end address are inputted into the resource node,
 *        0 or -EINVAL
 *****************************************************************************/
int ibmphp_check_resource(struct resource_node *res, u8 bridge)
{
	struct bus_node *bus_cur;
	struct range_node *range = NULL;
	struct resource_node *res_prev;
	struct resource_node *res_cur = NULL;
	u32 len_cur = 0, start_cur = 0, len_tmp = 0;
	int noranges = 0;
	u32 tmp_start;		/* this is to make sure start address is divisible by the length needed */
	u32 tmp_divide;
	u8 flag = 0;

	if (!res)
		return -EINVAL;

	if (bridge) {
		/* The rules for bridges are different, 4K divisible for IO, 1M for (pf)mem*/
		if (res->type == IO)
			tmp_divide = IOBRIDGE;
		else
			tmp_divide = MEMBRIDGE;
	} else
		tmp_divide = res->len;

	bus_cur = find_bus_wprev(res->busno, NULL, 0);

	if (!bus_cur) {
		/* didn't find a bus, something's wrong!!! */
		debug("no bus in the system, either pci_dev's wrong or allocation failed\n");
		return -EINVAL;
	}

	debug("%s - enter\n", __func__);
	debug("bus_cur->busno is %d\n", bus_cur->busno);

	/* This is a quick fix to not mess up with the code very much.  i.e.,
	 * 2000-2fff, len = 1000, but when we compare, we need it to be fff */
	res->len -= 1;

	switch (res->type) {
		case IO:
			res_cur = bus_cur->firstIO;
			noranges = bus_cur->noIORanges;
			break;
		case MEM:
			res_cur = bus_cur->firstMem;
			noranges = bus_cur->noMemRanges;
			break;
		case PFMEM:
			res_cur = bus_cur->firstPFMem;
			noranges = bus_cur->noPFMemRanges;
			break;
		default:
			err("wrong type of resource to check\n");
			return -EINVAL;
	}
	res_prev = NULL;

	while (res_cur) {
		range = find_range(bus_cur, res_cur);
		debug("%s - rangeno = %d\n", __func__, res_cur->rangeno);

		if (!range) {
			err("no range for the device exists... bailing out...\n");
			return -EINVAL;
		}

		/* found our range */
		if (!res_prev) {
			/* first time in the loop */
			len_tmp = res_cur->start - 1 - range->start;

			if ((res_cur->start != range->start) && (len_tmp >= res->len)) {
				debug("len_tmp = %x\n", len_tmp);

				if ((len_tmp < len_cur) || (len_cur == 0)) {

					if ((range->start % tmp_divide) == 0) {
						/* just perfect, starting address is divisible by length */
						flag = 1;
						len_cur = len_tmp;
						start_cur = range->start;
					} else {
						/* Needs adjusting */
						tmp_start = range->start;
						flag = 0;

						while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) {
							if ((tmp_start % tmp_divide) == 0) {
								flag = 1;
								len_cur = len_tmp;
								start_cur = tmp_start;
								break;
							}
							tmp_start += tmp_divide - tmp_start % tmp_divide;
							if (tmp_start >= res_cur->start - 1)
								break;
						}
					}

					if (flag && len_cur == res->len) {
						debug("but we are not here, right?\n");
						res->start = start_cur;
						res->len += 1; /* To restore the balance */
						res->end = res->start + res->len - 1;
						return 0;
					}
				}
			}
		}
		if (!res_cur->next) {
			/* last device on the range */
			len_tmp = range->end - (res_cur->end + 1);

			if ((range->end != res_cur->end) && (len_tmp >= res->len)) {
				debug("len_tmp = %x\n", len_tmp);
				if ((len_tmp < len_cur) || (len_cur == 0)) {

					if (((res_cur->end + 1) % tmp_divide) == 0) {
						/* just perfect, starting address is divisible by length */
						flag = 1;
						len_cur = len_tmp;
						start_cur = res_cur->end + 1;
					} else {
						/* Needs adjusting */
						tmp_start = res_cur->end + 1;
						flag = 0;

						while ((len_tmp = range->end - tmp_start) >= res->len) {
							if ((tmp_start % tmp_divide) == 0) {
								flag = 1;
								len_cur = len_tmp;
								start_cur = tmp_start;
								break;
							}
							tmp_start += tmp_divide - tmp_start % tmp_divide;
							if (tmp_start >= range->end)
								break;
						}
					}
					if (flag && len_cur == res->len) {
						res->start = start_cur;
						res->len += 1; /* To restore the balance */
						res->end = res->start + res->len - 1;
						return 0;
					}
				}
			}
		}

		if (res_prev) {
			if (res_prev->rangeno != res_cur->rangeno) {
				/* 1st device on this range */
				len_tmp = res_cur->start - 1 - range->start;

				if ((res_cur->start != range->start) &&	(len_tmp >= res->len)) {
					if ((len_tmp < len_cur) || (len_cur == 0)) {
						if ((range->start % tmp_divide) == 0) {
							/* just perfect, starting address is divisible by length */
							flag = 1;
							len_cur = len_tmp;
							start_cur = range->start;
						} else {
							/* Needs adjusting */
							tmp_start = range->start;
							flag = 0;

							while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) {
								if ((tmp_start % tmp_divide) == 0) {
									flag = 1;
									len_cur = len_tmp;
									start_cur = tmp_start;
									break;
								}
								tmp_start += tmp_divide - tmp_start % tmp_divide;
								if (tmp_start >= res_cur->start - 1)
									break;
							}
						}

						if (flag && len_cur == res->len) {
							res->start = start_cur;
							res->len += 1; /* To restore the balance */
							res->end = res->start + res->len - 1;
							return 0;
						}
					}
				}
			} else {
				/* in the same range */
				len_tmp = res_cur->start - 1 - res_prev->end - 1;

				if (len_tmp >= res->len) {
					if ((len_tmp < len_cur) || (len_cur == 0)) {
						if (((res_prev->end + 1) % tmp_divide) == 0) {
							/* just perfect, starting address's divisible by length */
							flag = 1;
							len_cur = len_tmp;
							start_cur = res_prev->end + 1;
						} else {
							/* Needs adjusting */
							tmp_start = res_prev->end + 1;
							flag = 0;

							while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) {
								if ((tmp_start % tmp_divide) == 0) {
									flag = 1;
									len_cur = len_tmp;
									start_cur = tmp_start;
									break;
								}
								tmp_start += tmp_divide - tmp_start % tmp_divide;
								if (tmp_start >= res_cur->start - 1)
									break;
							}
						}

						if (flag && len_cur == res->len) {
							res->start = start_cur;
							res->len += 1; /* To restore the balance */
							res->end = res->start + res->len - 1;
							return 0;
						}
					}
				}
			}
		}
		/* end if (res_prev) */
		res_prev = res_cur;
		if (res_cur->next)
			res_cur = res_cur->next;
		else
			res_cur = res_cur->nextRange;
	}	/* end of while */


	if (!res_prev) {
		/* 1st device ever */
		/* need to find appropriate range */
		switch (res->type) {
			case IO:
				range = bus_cur->rangeIO;
				break;
			case MEM:
				range = bus_cur->rangeMem;
				break;
			case PFMEM:
				range = bus_cur->rangePFMem;
				break;
		}
		while (range) {
			len_tmp = range->end - range->start;

			if (len_tmp >= res->len) {
				if ((len_tmp < len_cur) || (len_cur == 0)) {
					if ((range->start % tmp_divide) == 0) {
						/* just perfect, starting address's divisible by length */
						flag = 1;
						len_cur = len_tmp;
						start_cur = range->start;
					} else {
						/* Needs adjusting */
						tmp_start = range->start;
						flag = 0;

						while ((len_tmp = range->end - tmp_start) >= res->len) {
							if ((tmp_start % tmp_divide) == 0) {
								flag = 1;
								len_cur = len_tmp;
								start_cur = tmp_start;
								break;
							}
							tmp_start += tmp_divide - tmp_start % tmp_divide;
							if (tmp_start >= range->end)
								break;
						}
					}

					if (flag && len_cur == res->len) {
						res->start = start_cur;
						res->len += 1; /* To restore the balance */
						res->end = res->start + res->len - 1;
						return 0;
					}
				}
			}
			range = range->next;
		}		/* end of while */

		if ((!range) && (len_cur == 0)) {
			/* have gone through the list of devices and ranges and haven't found n.e.thing */
			err("no appropriate range.. bailing out...\n");
			return -EINVAL;
		} else if (len_cur) {
			res->start = start_cur;
			res->len += 1; /* To restore the balance */
			res->end = res->start + res->len - 1;
			return 0;
		}
	}

	if (!res_cur) {
		debug("prev->rangeno = %d, noranges = %d\n", res_prev->rangeno, noranges);
		if (res_prev->rangeno < noranges) {
			/* if there're more ranges out there to check */
			switch (res->type) {
				case IO:
					range = bus_cur->rangeIO;
					break;
				case MEM:
					range = bus_cur->rangeMem;
					break;
				case PFMEM:
					range = bus_cur->rangePFMem;
					break;
			}
			while (range) {
				len_tmp = range->end - range->start;

				if (len_tmp >= res->len) {
					if ((len_tmp < len_cur) || (len_cur == 0)) {
						if ((range->start % tmp_divide) == 0) {
							/* just perfect, starting address's divisible by length */
							flag = 1;
							len_cur = len_tmp;
							start_cur = range->start;
						} else {
							/* Needs adjusting */
							tmp_start = range->start;
							flag = 0;

							while ((len_tmp = range->end - tmp_start) >= res->len) {
								if ((tmp_start % tmp_divide) == 0) {
									flag = 1;
									len_cur = len_tmp;
									start_cur = tmp_start;
									break;
								}
								tmp_start += tmp_divide - tmp_start % tmp_divide;
								if (tmp_start >= range->end)
									break;
							}
						}

						if (flag && len_cur == res->len) {
							res->start = start_cur;
							res->len += 1; /* To restore the balance */
							res->end = res->start + res->len - 1;
							return 0;
						}
					}
				}
				range = range->next;
			}	/* end of while */

			if ((!range) && (len_cur == 0)) {
				/* have gone through the list of devices and ranges and haven't found n.e.thing */
				err("no appropriate range.. bailing out...\n");
				return -EINVAL;
			} else if (len_cur) {
				res->start = start_cur;
				res->len += 1; /* To restore the balance */
				res->end = res->start + res->len - 1;
				return 0;
			}
		} else {
			/* no more ranges to check on */
			if (len_cur) {
				res->start = start_cur;
				res->len += 1; /* To restore the balance */
				res->end = res->start + res->len - 1;
				return 0;
			} else {
				/* have gone through the list of devices and haven't found n.e.thing */
				err("no appropriate range.. bailing out...\n");
				return -EINVAL;
			}
		}
	}	/* end if (!res_cur) */
	return -EINVAL;
}

/********************************************************************************
 * This routine is called from remove_card if the card contained PPB.
 * It will remove all the resources on the bus as well as the bus itself
 * Input: Bus
 * Output: 0, -ENODEV
 ********************************************************************************/
int ibmphp_remove_bus(struct bus_node *bus, u8 parent_busno)
{
	struct resource_node *res_cur;
	struct resource_node *res_tmp;
	struct bus_node *prev_bus;
	int rc;

	prev_bus = find_bus_wprev(parent_busno, NULL, 0);

	if (!prev_bus) {
		debug("something terribly wrong. Cannot find parent bus to the one to remove\n");
		return -ENODEV;
	}

	debug("In ibmphp_remove_bus... prev_bus->busno is %x\n", prev_bus->busno);

	rc = remove_ranges(bus, prev_bus);
	if (rc)
		return rc;

	if (bus->firstIO) {
		res_cur = bus->firstIO;
		while (res_cur) {
			res_tmp = res_cur;
			if (res_cur->next)
				res_cur = res_cur->next;
			else
				res_cur = res_cur->nextRange;
			kfree(res_tmp);
			res_tmp = NULL;
		}
		bus->firstIO = NULL;
	}
	if (bus->firstMem) {
		res_cur = bus->firstMem;
		while (res_cur) {
			res_tmp = res_cur;
			if (res_cur->next)
				res_cur = res_cur->next;
			else
				res_cur = res_cur->nextRange;
			kfree(res_tmp);
			res_tmp = NULL;
		}
		bus->firstMem = NULL;
	}
	if (bus->firstPFMem) {
		res_cur = bus->firstPFMem;
		while (res_cur) {
			res_tmp = res_cur;
			if (res_cur->next)
				res_cur = res_cur->next;
			else
				res_cur = res_cur->nextRange;
			kfree(res_tmp);
			res_tmp = NULL;
		}
		bus->firstPFMem = NULL;
	}

	if (bus->firstPFMemFromMem) {
		res_cur = bus->firstPFMemFromMem;
		while (res_cur) {
			res_tmp = res_cur;
			res_cur = res_cur->next;

			kfree(res_tmp);
			res_tmp = NULL;
		}
		bus->firstPFMemFromMem = NULL;
	}

	list_del(&bus->bus_list);
	kfree(bus);
	return 0;
}

/******************************************************************************
 * This routine deletes the ranges from a given bus, and the entries from the
 * parent's bus in the resources
 * Input: current bus, previous bus
 * Output: 0, -EINVAL
 ******************************************************************************/
static int remove_ranges(struct bus_node *bus_cur, struct bus_node *bus_prev)
{
	struct range_node *range_cur;
	struct range_node *range_tmp;
	int i;
	struct resource_node *res = NULL;

	if (bus_cur->noIORanges) {
		range_cur = bus_cur->rangeIO;
		for (i = 0; i < bus_cur->noIORanges; i++) {
			if (ibmphp_find_resource(bus_prev, range_cur->start, &res, IO) < 0)
				return -EINVAL;
			ibmphp_remove_resource(res);

			range_tmp = range_cur;
			range_cur = range_cur->next;
			kfree(range_tmp);
			range_tmp = NULL;
		}
		bus_cur->rangeIO = NULL;
	}
	if (bus_cur->noMemRanges) {
		range_cur = bus_cur->rangeMem;
		for (i = 0; i < bus_cur->noMemRanges; i++) {
			if (ibmphp_find_resource(bus_prev, range_cur->start, &res, MEM) < 0)
				return -EINVAL;

			ibmphp_remove_resource(res);
			range_tmp = range_cur;
			range_cur = range_cur->next;
			kfree(range_tmp);
			range_tmp = NULL;
		}
		bus_cur->rangeMem = NULL;
	}
	if (bus_cur->noPFMemRanges) {
		range_cur = bus_cur->rangePFMem;
		for (i = 0; i < bus_cur->noPFMemRanges; i++) {
			if (ibmphp_find_resource(bus_prev, range_cur->start, &res, PFMEM) < 0)
				return -EINVAL;

			ibmphp_remove_resource(res);
			range_tmp = range_cur;
			range_cur = range_cur->next;
			kfree(range_tmp);
			range_tmp = NULL;
		}
		bus_cur->rangePFMem = NULL;
	}
	return 0;
}

/*
 * find the resource node in the bus
 * Input: Resource needed, start address of the resource, type of resource
 */
int ibmphp_find_resource(struct bus_node *bus, u32 start_address, struct resource_node **res, int flag)
{
	struct resource_node *res_cur = NULL;
	char *type = "";

	if (!bus) {
		err("The bus passed in NULL to find resource\n");
		return -ENODEV;
	}

	switch (flag) {
		case IO:
			res_cur = bus->firstIO;
			type = "io";
			break;
		case MEM:
			res_cur = bus->firstMem;
			type = "mem";
			break;
		case PFMEM:
			res_cur = bus->firstPFMem;
			type = "pfmem";
			break;
		default:
			err("wrong type of flag\n");
			return -EINVAL;
	}

	while (res_cur) {
		if (res_cur->start == start_address) {
			*res = res_cur;
			break;
		}
		if (res_cur->next)
			res_cur = res_cur->next;
		else
			res_cur = res_cur->nextRange;
	}

	if (!res_cur) {
		if (flag == PFMEM) {
			res_cur = bus->firstPFMemFromMem;
			while (res_cur) {
				if (res_cur->start == start_address) {
					*res = res_cur;
					break;
				}
				res_cur = res_cur->next;
			}
			if (!res_cur) {
				debug("SOS...cannot find %s resource in the bus.\n", type);
				return -EINVAL;
			}
		} else {
			debug("SOS... cannot find %s resource in the bus.\n", type);
			return -EINVAL;
		}
	}

	if (*res)
		debug("*res->start = %x\n", (*res)->start);

	return 0;
}

/***********************************************************************
 * This routine will free the resource structures used by the
 * system.  It is called from cleanup routine for the module
 * Parameters: none
 * Returns: none
 ***********************************************************************/
void ibmphp_free_resources(void)
{
	struct bus_node *bus_cur = NULL, *next;
	struct bus_node *bus_tmp;
	struct range_node *range_cur;
	struct range_node *range_tmp;
	struct resource_node *res_cur;
	struct resource_node *res_tmp;
	int i = 0;
	flags = 1;

	list_for_each_entry_safe(bus_cur, next, &gbuses, bus_list) {
		if (bus_cur->noIORanges) {
			range_cur = bus_cur->rangeIO;
			for (i = 0; i < bus_cur->noIORanges; i++) {
				if (!range_cur)
					break;
				range_tmp = range_cur;
				range_cur = range_cur->next;
				kfree(range_tmp);
				range_tmp = NULL;
			}
		}
		if (bus_cur->noMemRanges) {
			range_cur = bus_cur->rangeMem;
			for (i = 0; i < bus_cur->noMemRanges; i++) {
				if (!range_cur)
					break;
				range_tmp = range_cur;
				range_cur = range_cur->next;
				kfree(range_tmp);
				range_tmp = NULL;
			}
		}
		if (bus_cur->noPFMemRanges) {
			range_cur = bus_cur->rangePFMem;
			for (i = 0; i < bus_cur->noPFMemRanges; i++) {
				if (!range_cur)
					break;
				range_tmp = range_cur;
				range_cur = range_cur->next;
				kfree(range_tmp);
				range_tmp = NULL;
			}
		}

		if (bus_cur->firstIO) {
			res_cur = bus_cur->firstIO;
			while (res_cur) {
				res_tmp = res_cur;
				if (res_cur->next)
					res_cur = res_cur->next;
				else
					res_cur = res_cur->nextRange;
				kfree(res_tmp);
				res_tmp = NULL;
			}
			bus_cur->firstIO = NULL;
		}
		if (bus_cur->firstMem) {
			res_cur = bus_cur->firstMem;
			while (res_cur) {
				res_tmp = res_cur;
				if (res_cur->next)
					res_cur = res_cur->next;
				else
					res_cur = res_cur->nextRange;
				kfree(res_tmp);
				res_tmp = NULL;
			}
			bus_cur->firstMem = NULL;
		}
		if (bus_cur->firstPFMem) {
			res_cur = bus_cur->firstPFMem;
			while (res_cur) {
				res_tmp = res_cur;
				if (res_cur->next)
					res_cur = res_cur->next;
				else
					res_cur = res_cur->nextRange;
				kfree(res_tmp);
				res_tmp = NULL;
			}
			bus_cur->firstPFMem = NULL;
		}

		if (bus_cur->firstPFMemFromMem) {
			res_cur = bus_cur->firstPFMemFromMem;
			while (res_cur) {
				res_tmp = res_cur;
				res_cur = res_cur->next;

				kfree(res_tmp);
				res_tmp = NULL;
			}
			bus_cur->firstPFMemFromMem = NULL;
		}

		bus_tmp = bus_cur;
		list_del(&bus_cur->bus_list);
		kfree(bus_tmp);
		bus_tmp = NULL;
	}
}

/*********************************************************************************
 * This function will go over the PFmem resources to check if the EBDA allocated
 * pfmem out of memory buckets of the bus.  If so, it will change the range numbers
 * and a flag to indicate that this resource is out of memory. It will also move the
 * Pfmem out of the pfmem resource list to the PFMemFromMem list, and will create
 * a new Mem node
 * This routine is called right after initialization
 *******************************************************************************/
static int __init once_over(void)
{
	struct resource_node *pfmem_cur;
	struct resource_node *pfmem_prev;
	struct resource_node *mem;
	struct bus_node *bus_cur;

	list_for_each_entry(bus_cur, &gbuses, bus_list) {
		if ((!bus_cur->rangePFMem) && (bus_cur->firstPFMem)) {
			for (pfmem_cur = bus_cur->firstPFMem, pfmem_prev = NULL; pfmem_cur; pfmem_prev = pfmem_cur, pfmem_cur = pfmem_cur->next) {
				pfmem_cur->fromMem = 1;
				if (pfmem_prev)
					pfmem_prev->next = pfmem_cur->next;
				else
					bus_cur->firstPFMem = pfmem_cur->next;

				if (!bus_cur->firstPFMemFromMem)
					pfmem_cur->next = NULL;
				else
					/* we don't need to sort PFMemFromMem since we're using mem node for
					   all the real work anyways, so just insert at the beginning of the
					   list
					 */
					pfmem_cur->next = bus_cur->firstPFMemFromMem;

				bus_cur->firstPFMemFromMem = pfmem_cur;

				mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
				if (!mem)
					return -ENOMEM;

				mem->type = MEM;
				mem->busno = pfmem_cur->busno;
				mem->devfunc = pfmem_cur->devfunc;
				mem->start = pfmem_cur->start;
				mem->end = pfmem_cur->end;
				mem->len = pfmem_cur->len;
				if (ibmphp_add_resource(mem) < 0)
					err("Trouble...trouble... EBDA allocated pfmem from mem, but system doesn't display it has this space... unless not PCI device...\n");
				pfmem_cur->rangeno = mem->rangeno;
			}	/* end for pfmem */
		}	/* end if */
	}	/* end list_for_each bus */
	return 0;
}

int ibmphp_add_pfmem_from_mem(struct resource_node *pfmem)
{
	struct bus_node *bus_cur = find_bus_wprev(pfmem->busno, NULL, 0);

	if (!bus_cur) {
		err("cannot find bus of pfmem to add...\n");
		return -ENODEV;
	}

	if (bus_cur->firstPFMemFromMem)
		pfmem->next = bus_cur->firstPFMemFromMem;
	else
		pfmem->next = NULL;

	bus_cur->firstPFMemFromMem = pfmem;

	return 0;
}

/* This routine just goes through the buses to see if the bus already exists.
 * It is called from ibmphp_find_sec_number, to find out a secondary bus number for
 * bridged cards
 * Parameters: bus_number
 * Returns: Bus pointer or NULL
 */
struct bus_node *ibmphp_find_res_bus(u8 bus_number)
{
	return find_bus_wprev(bus_number, NULL, 0);
}

static struct bus_node *find_bus_wprev(u8 bus_number, struct bus_node **prev, u8 flag)
{
	struct bus_node *bus_cur;

	list_for_each_entry(bus_cur, &gbuses, bus_list) {
		if (flag)
			*prev = list_prev_entry(bus_cur, bus_list);
		if (bus_cur->busno == bus_number)
			return bus_cur;
	}

	return NULL;
}

void ibmphp_print_test(void)
{
	int i = 0;
	struct bus_node *bus_cur = NULL;
	struct range_node *range;
	struct resource_node *res;

	debug_pci("*****************START**********************\n");

	if ((!list_empty(&gbuses)) && flags) {
		err("The GBUSES is not NULL?!?!?!?!?\n");
		return;
	}

	list_for_each_entry(bus_cur, &gbuses, bus_list) {
		debug_pci ("This is bus # %d.  There are\n", bus_cur->busno);
		debug_pci ("IORanges = %d\t", bus_cur->noIORanges);
		debug_pci ("MemRanges = %d\t", bus_cur->noMemRanges);
		debug_pci ("PFMemRanges = %d\n", bus_cur->noPFMemRanges);
		debug_pci ("The IO Ranges are as follows:\n");
		if (bus_cur->rangeIO) {
			range = bus_cur->rangeIO;
			for (i = 0; i < bus_cur->noIORanges; i++) {
				debug_pci("rangeno is %d\n", range->rangeno);
				debug_pci("[%x - %x]\n", range->start, range->end);
				range = range->next;
			}
		}

		debug_pci("The Mem Ranges are as follows:\n");
		if (bus_cur->rangeMem) {
			range = bus_cur->rangeMem;
			for (i = 0; i < bus_cur->noMemRanges; i++) {
				debug_pci("rangeno is %d\n", range->rangeno);
				debug_pci("[%x - %x]\n", range->start, range->end);
				range = range->next;
			}
		}

		debug_pci("The PFMem Ranges are as follows:\n");

		if (bus_cur->rangePFMem) {
			range = bus_cur->rangePFMem;
			for (i = 0; i < bus_cur->noPFMemRanges; i++) {
				debug_pci("rangeno is %d\n", range->rangeno);
				debug_pci("[%x - %x]\n", range->start, range->end);
				range = range->next;
			}
		}

		debug_pci("The resources on this bus are as follows\n");

		debug_pci("IO...\n");
		if (bus_cur->firstIO) {
			res = bus_cur->firstIO;
			while (res) {
				debug_pci("The range # is %d\n", res->rangeno);
				debug_pci("The bus, devfnc is %d, %x\n", res->busno, res->devfunc);
				debug_pci("[%x - %x], len=%x\n", res->start, res->end, res->len);
				if (res->next)
					res = res->next;
				else if (res->nextRange)
					res = res->nextRange;
				else
					break;
			}
		}
		debug_pci("Mem...\n");
		if (bus_cur->firstMem) {
			res = bus_cur->firstMem;
			while (res) {
				debug_pci("The range # is %d\n", res->rangeno);
				debug_pci("The bus, devfnc is %d, %x\n", res->busno, res->devfunc);
				debug_pci("[%x - %x], len=%x\n", res->start, res->end, res->len);
				if (res->next)
					res = res->next;
				else if (res->nextRange)
					res = res->nextRange;
				else
					break;
			}
		}
		debug_pci("PFMem...\n");
		if (bus_cur->firstPFMem) {
			res = bus_cur->firstPFMem;
			while (res) {
				debug_pci("The range # is %d\n", res->rangeno);
				debug_pci("The bus, devfnc is %d, %x\n", res->busno, res->devfunc);
				debug_pci("[%x - %x], len=%x\n", res->start, res->end, res->len);
				if (res->next)
					res = res->next;
				else if (res->nextRange)
					res = res->nextRange;
				else
					break;
			}
		}

		debug_pci("PFMemFromMem...\n");
		if (bus_cur->firstPFMemFromMem) {
			res = bus_cur->firstPFMemFromMem;
			while (res) {
				debug_pci("The range # is %d\n", res->rangeno);
				debug_pci("The bus, devfnc is %d, %x\n", res->busno, res->devfunc);
				debug_pci("[%x - %x], len=%x\n", res->start, res->end, res->len);
				res = res->next;
			}
		}
	}
	debug_pci("***********************END***********************\n");
}

static int range_exists_already(struct range_node *range, struct bus_node *bus_cur, u8 type)
{
	struct range_node *range_cur = NULL;
	switch (type) {
		case IO:
			range_cur = bus_cur->rangeIO;
			break;
		case MEM:
			range_cur = bus_cur->rangeMem;
			break;
		case PFMEM:
			range_cur = bus_cur->rangePFMem;
			break;
		default:
			err("wrong type passed to find out if range already exists\n");
			return -ENODEV;
	}

	while (range_cur) {
		if ((range_cur->start == range->start) && (range_cur->end == range->end))
			return 1;
		range_cur = range_cur->next;
	}

	return 0;
}

/* This routine will read the windows for any PPB we have and update the
 * range info for the secondary bus, and will also input this info into
 * primary bus, since BIOS doesn't. This is for PPB that are in the system
 * on bootup.  For bridged cards that were added during previous load of the
 * driver, only the ranges and the bus structure are added, the devices are
 * added from NVRAM
 * Input: primary busno
 * Returns: none
 * Note: this function doesn't take into account IO restrictions etc,
 *	 so will only work for bridges with no video/ISA devices behind them It
 *	 also will not work for onboard PPBs that can have more than 1 *bus
 *	 behind them All these are TO DO.
 *	 Also need to add more error checkings... (from fnc returns etc)
 */
static int __init update_bridge_ranges(struct bus_node **bus)
{
	u8 sec_busno, device, function, hdr_type, start_io_address, end_io_address;
	u16 vendor_id, upper_io_start, upper_io_end, start_mem_address, end_mem_address;
	u32 start_address, end_address, upper_start, upper_end;
	struct bus_node *bus_sec;
	struct bus_node *bus_cur;
	struct resource_node *io;
	struct resource_node *mem;
	struct resource_node *pfmem;
	struct range_node *range;
	unsigned int devfn;

	bus_cur = *bus;
	if (!bus_cur)
		return -ENODEV;
	ibmphp_pci_bus->number = bus_cur->busno;

	debug("inside %s\n", __func__);
	debug("bus_cur->busno = %x\n", bus_cur->busno);

	for (device = 0; device < 32; device++) {
		for (function = 0x00; function < 0x08; function++) {
			devfn = PCI_DEVFN(device, function);
			pci_bus_read_config_word(ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id);

			if (vendor_id != PCI_VENDOR_ID_NOTVALID) {
				/* found correct device!!! */
				pci_bus_read_config_byte(ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type);

				switch (hdr_type) {
					case PCI_HEADER_TYPE_NORMAL:
						function = 0x8;
						break;
					case PCI_HEADER_TYPE_MULTIDEVICE:
						break;
					case PCI_HEADER_TYPE_BRIDGE:
						function = 0x8;
						fallthrough;
					case PCI_HEADER_TYPE_MULTIBRIDGE:
						/* We assume here that only 1 bus behind the bridge
						   TO DO: add functionality for several:
						   temp = secondary;
						   while (temp < subordinate) {
						   ...
						   temp++;
						   }
						 */
						pci_bus_read_config_byte(ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_busno);
						bus_sec = find_bus_wprev(sec_busno, NULL, 0);
						/* this bus structure doesn't exist yet, PPB was configured during previous loading of ibmphp */
						if (!bus_sec) {
							alloc_error_bus(NULL, sec_busno, 1);
							/* the rest will be populated during NVRAM call */
							return 0;
						}
						pci_bus_read_config_byte(ibmphp_pci_bus, devfn, PCI_IO_BASE, &start_io_address);
						pci_bus_read_config_byte(ibmphp_pci_bus, devfn, PCI_IO_LIMIT, &end_io_address);
						pci_bus_read_config_word(ibmphp_pci_bus, devfn, PCI_IO_BASE_UPPER16, &upper_io_start);
						pci_bus_read_config_word(ibmphp_pci_bus, devfn, PCI_IO_LIMIT_UPPER16, &upper_io_end);
						start_address = (start_io_address & PCI_IO_RANGE_MASK) << 8;
						start_address |= (upper_io_start << 16);
						end_address = (end_io_address & PCI_IO_RANGE_MASK) << 8;
						end_address |= (upper_io_end << 16);

						if ((start_address) && (start_address <= end_address)) {
							range = kzalloc(sizeof(struct range_node), GFP_KERNEL);
							if (!range)
								return -ENOMEM;

							range->start = start_address;
							range->end = end_address + 0xfff;

							if (bus_sec->noIORanges > 0) {
								if (!range_exists_already(range, bus_sec, IO)) {
									add_bus_range(IO, range, bus_sec);
									++bus_sec->noIORanges;
								} else {
									kfree(range);
									range = NULL;
								}
							} else {
								/* 1st IO Range on the bus */
								range->rangeno = 1;
								bus_sec->rangeIO = range;
								++bus_sec->noIORanges;
							}
							fix_resources(bus_sec);

							if (ibmphp_find_resource(bus_cur, start_address, &io, IO)) {
								io = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
								if (!io) {
									kfree(range);
									return -ENOMEM;
								}
								io->type = IO;
								io->busno = bus_cur->busno;
								io->devfunc = ((device << 3) | (function & 0x7));
								io->start = start_address;
								io->end = end_address + 0xfff;
								io->len = io->end - io->start + 1;
								ibmphp_add_resource(io);
							}
						}

						pci_bus_read_config_word(ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, &start_mem_address);
						pci_bus_read_config_word(ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, &end_mem_address);

						start_address = 0x00000000 | (start_mem_address & PCI_MEMORY_RANGE_MASK) << 16;
						end_address = 0x00000000 | (end_mem_address & PCI_MEMORY_RANGE_MASK) << 16;

						if ((start_address) && (start_address <= end_address)) {

							range = kzalloc(sizeof(struct range_node), GFP_KERNEL);
							if (!range)
								return -ENOMEM;

							range->start = start_address;
							range->end = end_address + 0xfffff;

							if (bus_sec->noMemRanges > 0) {
								if (!range_exists_already(range, bus_sec, MEM)) {
									add_bus_range(MEM, range, bus_sec);
									++bus_sec->noMemRanges;
								} else {
									kfree(range);
									range = NULL;
								}
							} else {
								/* 1st Mem Range on the bus */
								range->rangeno = 1;
								bus_sec->rangeMem = range;
								++bus_sec->noMemRanges;
							}

							fix_resources(bus_sec);

							if (ibmphp_find_resource(bus_cur, start_address, &mem, MEM)) {
								mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
								if (!mem) {
									kfree(range);
									return -ENOMEM;
								}
								mem->type = MEM;
								mem->busno = bus_cur->busno;
								mem->devfunc = ((device << 3) | (function & 0x7));
								mem->start = start_address;
								mem->end = end_address + 0xfffff;
								mem->len = mem->end - mem->start + 1;
								ibmphp_add_resource(mem);
							}
						}
						pci_bus_read_config_word(ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, &start_mem_address);
						pci_bus_read_config_word(ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &end_mem_address);
						pci_bus_read_config_dword(ibmphp_pci_bus, devfn, PCI_PREF_BASE_UPPER32, &upper_start);
						pci_bus_read_config_dword(ibmphp_pci_bus, devfn, PCI_PREF_LIMIT_UPPER32, &upper_end);
						start_address = 0x00000000 | (start_mem_address & PCI_MEMORY_RANGE_MASK) << 16;
						end_address = 0x00000000 | (end_mem_address & PCI_MEMORY_RANGE_MASK) << 16;
#if BITS_PER_LONG == 64
						start_address |= ((long) upper_start) << 32;
						end_address |= ((long) upper_end) << 32;
#endif

						if ((start_address) && (start_address <= end_address)) {

							range = kzalloc(sizeof(struct range_node), GFP_KERNEL);
							if (!range)
								return -ENOMEM;

							range->start = start_address;
							range->end = end_address + 0xfffff;

							if (bus_sec->noPFMemRanges > 0) {
								if (!range_exists_already(range, bus_sec, PFMEM)) {
									add_bus_range(PFMEM, range, bus_sec);
									++bus_sec->noPFMemRanges;
								} else {
									kfree(range);
									range = NULL;
								}
							} else {
								/* 1st PFMem Range on the bus */
								range->rangeno = 1;
								bus_sec->rangePFMem = range;
								++bus_sec->noPFMemRanges;
							}

							fix_resources(bus_sec);
							if (ibmphp_find_resource(bus_cur, start_address, &pfmem, PFMEM)) {
								pfmem = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
								if (!pfmem) {
									kfree(range);
									return -ENOMEM;
								}
								pfmem->type = PFMEM;
								pfmem->busno = bus_cur->busno;
								pfmem->devfunc = ((device << 3) | (function & 0x7));
								pfmem->start = start_address;
								pfmem->end = end_address + 0xfffff;
								pfmem->len = pfmem->end - pfmem->start + 1;
								pfmem->fromMem = 0;

								ibmphp_add_resource(pfmem);
							}
						}
						break;
				}	/* end of switch */
			}	/* end if vendor */
		}	/* end for function */
	}	/* end for device */

	return 0;
}