summaryrefslogtreecommitdiffstats
path: root/drivers/pci/hotplug/cpqphp_pci.c
blob: 93e39c4096a927bf8b6737b298f875b1ebf2583a (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
/*
 * Compaq Hot Plug Controller Driver
 *
 * Copyright (C) 1995,2001 Compaq Computer Corporation
 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001 IBM Corp.
 *
 * All rights reserved.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Send feedback to <greg@kroah.com>
 *
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/proc_fs.h>
#include <linux/pci.h>
#include "../pci.h"
#include "cpqphp.h"
#include "cpqphp_nvram.h"
#include "../../../arch/i386/pci/pci.h"	/* horrible hack showing how processor dependent we are... */


u8 cpqhp_nic_irq;
u8 cpqhp_disk_irq;

static u16 unused_IRQ;

/*
 * detect_HRT_floating_pointer
 *
 * find the Hot Plug Resource Table in the specified region of memory.
 *
 */
static void __iomem *detect_HRT_floating_pointer(void __iomem *begin, void __iomem *end)
{
	void __iomem *fp;
	void __iomem *endp;
	u8 temp1, temp2, temp3, temp4;
	int status = 0;

	endp = (end - sizeof(struct hrt) + 1);

	for (fp = begin; fp <= endp; fp += 16) {
		temp1 = readb(fp + SIG0);
		temp2 = readb(fp + SIG1);
		temp3 = readb(fp + SIG2);
		temp4 = readb(fp + SIG3);
		if (temp1 == '$' &&
		    temp2 == 'H' &&
		    temp3 == 'R' &&
		    temp4 == 'T') {
			status = 1;
			break;
		}
	}

	if (!status)
		fp = NULL;

	dbg("Discovered Hotplug Resource Table at %p\n", fp);
	return fp;
}


int cpqhp_configure_device (struct controller* ctrl, struct pci_func* func)  
{
	unsigned char bus;
	struct pci_bus *child;
	int num;

	if (func->pci_dev == NULL)
		func->pci_dev = pci_find_slot(func->bus, PCI_DEVFN(func->device, func->function));

	/* No pci device, we need to create it then */
	if (func->pci_dev == NULL) {
		dbg("INFO: pci_dev still null\n");

		num = pci_scan_slot(ctrl->pci_dev->bus, PCI_DEVFN(func->device, func->function));
		if (num)
			pci_bus_add_devices(ctrl->pci_dev->bus);

		func->pci_dev = pci_find_slot(func->bus, PCI_DEVFN(func->device, func->function));
		if (func->pci_dev == NULL) {
			dbg("ERROR: pci_dev still null\n");
			return 0;
		}
	}

	if (func->pci_dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
		pci_read_config_byte(func->pci_dev, PCI_SECONDARY_BUS, &bus);
		child = (struct pci_bus*) pci_add_new_bus(func->pci_dev->bus, (func->pci_dev), bus);
		pci_do_scan_bus(child);
	}

	return 0;
}


int cpqhp_unconfigure_device(struct pci_func* func) 
{
	int j;
	
	dbg("%s: bus/dev/func = %x/%x/%x\n", __FUNCTION__, func->bus, func->device, func->function);

	for (j=0; j<8 ; j++) {
		struct pci_dev* temp = pci_find_slot(func->bus, PCI_DEVFN(func->device, j));
		if (temp)
			pci_remove_bus_device(temp);
	}
	return 0;
}

static int PCI_RefinedAccessConfig(struct pci_bus *bus, unsigned int devfn, u8 offset, u32 *value)
{
	u32 vendID = 0;

	if (pci_bus_read_config_dword (bus, devfn, PCI_VENDOR_ID, &vendID) == -1)
		return -1;
	if (vendID == 0xffffffff)
		return -1;
	return pci_bus_read_config_dword (bus, devfn, offset, value);
}


/*
 * cpqhp_set_irq
 *
 * @bus_num: bus number of PCI device
 * @dev_num: device number of PCI device
 * @slot: pointer to u8 where slot number will be returned
 */
int cpqhp_set_irq (u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num)
{
	int rc = 0;

	if (cpqhp_legacy_mode) {
		struct pci_dev *fakedev;
		struct pci_bus *fakebus;
		u16 temp_word;

		fakedev = kmalloc(sizeof(*fakedev), GFP_KERNEL);
		fakebus = kmalloc(sizeof(*fakebus), GFP_KERNEL);
		if (!fakedev || !fakebus) {
			kfree(fakedev);
			kfree(fakebus);
			return -ENOMEM;
		}

		fakedev->devfn = dev_num << 3;
		fakedev->bus = fakebus;
		fakebus->number = bus_num;
		dbg("%s: dev %d, bus %d, pin %d, num %d\n",
		    __FUNCTION__, dev_num, bus_num, int_pin, irq_num);
		rc = pcibios_set_irq_routing(fakedev, int_pin - 0x0a, irq_num);
		kfree(fakedev);
		kfree(fakebus);
		dbg("%s: rc %d\n", __FUNCTION__, rc);
		if (!rc)
			return !rc;

		// set the Edge Level Control Register (ELCR)
		temp_word = inb(0x4d0);
		temp_word |= inb(0x4d1) << 8;

		temp_word |= 0x01 << irq_num;

		// This should only be for x86 as it sets the Edge Level Control Register
		outb((u8) (temp_word & 0xFF), 0x4d0);
		outb((u8) ((temp_word & 0xFF00) >> 8), 0x4d1);
		rc = 0;
	}

	return rc;
}


/*
 * WTF??? This function isn't in the code, yet a function calls it, but the 
 * compiler optimizes it away?  strange.  Here as a placeholder to keep the 
 * compiler happy.
 */
static int PCI_ScanBusNonBridge (u8 bus, u8 device)
{
	return 0;
}

static int PCI_ScanBusForNonBridge(struct controller *ctrl, u8 bus_num, u8 * dev_num)
{
	u16 tdevice;
	u32 work;
	u8 tbus;

	ctrl->pci_bus->number = bus_num;

	for (tdevice = 0; tdevice < 0xFF; tdevice++) {
		//Scan for access first
		if (PCI_RefinedAccessConfig(ctrl->pci_bus, tdevice, 0x08, &work) == -1)
			continue;
		dbg("Looking for nonbridge bus_num %d dev_num %d\n", bus_num, tdevice);
		//Yep we got one. Not a bridge ?
		if ((work >> 8) != PCI_TO_PCI_BRIDGE_CLASS) {
			*dev_num = tdevice;
			dbg("found it !\n");
			return 0;
		}
	}
	for (tdevice = 0; tdevice < 0xFF; tdevice++) {
		//Scan for access first
		if (PCI_RefinedAccessConfig(ctrl->pci_bus, tdevice, 0x08, &work) == -1)
			continue;
		dbg("Looking for bridge bus_num %d dev_num %d\n", bus_num, tdevice);
		//Yep we got one. bridge ?
		if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
			pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(tdevice, 0), PCI_SECONDARY_BUS, &tbus);
			dbg("Recurse on bus_num %d tdevice %d\n", tbus, tdevice);
			if (PCI_ScanBusNonBridge(tbus, tdevice) == 0)
				return 0;
		}
	}

	return -1;
}


static int PCI_GetBusDevHelper(struct controller *ctrl, u8 *bus_num, u8 *dev_num, u8 slot, u8 nobridge)
{
	struct irq_routing_table *PCIIRQRoutingInfoLength;
	long len;
	long loop;
	u32 work;

	u8 tbus, tdevice, tslot;

	PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table();
	if (!PCIIRQRoutingInfoLength)
		return -1;

	len = (PCIIRQRoutingInfoLength->size -
	       sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
	// Make sure I got at least one entry
	if (len == 0) {
		if (PCIIRQRoutingInfoLength != NULL)
			kfree(PCIIRQRoutingInfoLength );
		return -1;
	}

	for (loop = 0; loop < len; ++loop) {
		tbus = PCIIRQRoutingInfoLength->slots[loop].bus;
		tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn;
		tslot = PCIIRQRoutingInfoLength->slots[loop].slot;

		if (tslot == slot) {
			*bus_num = tbus;
			*dev_num = tdevice;
			ctrl->pci_bus->number = tbus;
			pci_bus_read_config_dword (ctrl->pci_bus, *dev_num, PCI_VENDOR_ID, &work);
			if (!nobridge || (work == 0xffffffff)) {
				if (PCIIRQRoutingInfoLength != NULL)
					kfree(PCIIRQRoutingInfoLength );
				return 0;
			}

			dbg("bus_num %d devfn %d\n", *bus_num, *dev_num);
			pci_bus_read_config_dword (ctrl->pci_bus, *dev_num, PCI_CLASS_REVISION, &work);
			dbg("work >> 8 (%x) = BRIDGE (%x)\n", work >> 8, PCI_TO_PCI_BRIDGE_CLASS);

			if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
				pci_bus_read_config_byte (ctrl->pci_bus, *dev_num, PCI_SECONDARY_BUS, &tbus);
				dbg("Scan bus for Non Bridge: bus %d\n", tbus);
				if (PCI_ScanBusForNonBridge(ctrl, tbus, dev_num) == 0) {
					*bus_num = tbus;
					if (PCIIRQRoutingInfoLength != NULL)
						kfree(PCIIRQRoutingInfoLength );
					return 0;
				}
			} else {
				if (PCIIRQRoutingInfoLength != NULL)
					kfree(PCIIRQRoutingInfoLength );
				return 0;
			}

		}
	}
	if (PCIIRQRoutingInfoLength != NULL)
		kfree(PCIIRQRoutingInfoLength );
	return -1;
}


int cpqhp_get_bus_dev (struct controller *ctrl, u8 * bus_num, u8 * dev_num, u8 slot)
{
	return PCI_GetBusDevHelper(ctrl, bus_num, dev_num, slot, 0);	//plain (bridges allowed)
}


/* More PCI configuration routines; this time centered around hotplug controller */


/*
 * cpqhp_save_config
 *
 * Reads configuration for all slots in a PCI bus and saves info.
 *
 * Note:  For non-hot plug busses, the slot # saved is the device #
 *
 * returns 0 if success
 */
int cpqhp_save_config(struct controller *ctrl, int busnumber, int is_hot_plug)
{
	long rc;
	u8 class_code;
	u8 header_type;
	u32 ID;
	u8 secondary_bus;
	struct pci_func *new_slot;
	int sub_bus;
	int FirstSupported;
	int LastSupported;
	int max_functions;
	int function;
	u8 DevError;
	int device = 0;
	int cloop = 0;
	int stop_it;
	int index;

	//              Decide which slots are supported

	if (is_hot_plug) {
		//*********************************
		// is_hot_plug is the slot mask
		//*********************************
		FirstSupported = is_hot_plug >> 4;
		LastSupported = FirstSupported + (is_hot_plug & 0x0F) - 1;
	} else {
		FirstSupported = 0;
		LastSupported = 0x1F;
	}

	//     Save PCI configuration space for all devices in supported slots
	ctrl->pci_bus->number = busnumber;
	for (device = FirstSupported; device <= LastSupported; device++) {
		ID = 0xFFFFFFFF;
		rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(device, 0), PCI_VENDOR_ID, &ID);

		if (ID != 0xFFFFFFFF) {	  //  device in slot
			rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, 0), 0x0B, &class_code);
			if (rc)
				return rc;

			rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, 0), PCI_HEADER_TYPE, &header_type);
			if (rc)
				return rc;

			// If multi-function device, set max_functions to 8
			if (header_type & 0x80)
				max_functions = 8;
			else
				max_functions = 1;

			function = 0;

			do {
				DevError = 0;

				if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {   // P-P Bridge
					//  Recurse the subordinate bus
					//  get the subordinate bus number
					rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, function), PCI_SECONDARY_BUS, &secondary_bus);
					if (rc) {
						return rc;
					} else {
						sub_bus = (int) secondary_bus;

						// Save secondary bus cfg spc
						// with this recursive call.
						rc = cpqhp_save_config(ctrl, sub_bus, 0);
						if (rc)
							return rc;
						ctrl->pci_bus->number = busnumber;
					}
				}

				index = 0;
				new_slot = cpqhp_slot_find(busnumber, device, index++);
				while (new_slot && 
				       (new_slot->function != (u8) function))
					new_slot = cpqhp_slot_find(busnumber, device, index++);

				if (!new_slot) {
					// Setup slot structure.
					new_slot = cpqhp_slot_create(busnumber);

					if (new_slot == NULL)
						return(1);
				}

				new_slot->bus = (u8) busnumber;
				new_slot->device = (u8) device;
				new_slot->function = (u8) function;
				new_slot->is_a_board = 1;
				new_slot->switch_save = 0x10;
				// In case of unsupported board
				new_slot->status = DevError;
				new_slot->pci_dev = pci_find_slot(new_slot->bus, (new_slot->device << 3) | new_slot->function);

				for (cloop = 0; cloop < 0x20; cloop++) {
					rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(device, function), cloop << 2, (u32 *) & (new_slot-> config_space [cloop]));
					if (rc)
						return rc;
				}

				function++;

				stop_it = 0;

				//  this loop skips to the next present function
				//  reading in Class Code and Header type.

				while ((function < max_functions)&&(!stop_it)) {
					rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(device, function), PCI_VENDOR_ID, &ID);
					if (ID == 0xFFFFFFFF) {	 // nothing there.
						function++;
					} else {  // Something there
						rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, function), 0x0B, &class_code);
						if (rc)
							return rc;

						rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, function), PCI_HEADER_TYPE, &header_type);
						if (rc)
							return rc;

						stop_it++;
					}
				}

			} while (function < max_functions);
		}		// End of IF (device in slot?)
		else if (is_hot_plug) {
			// Setup slot structure with entry for empty slot
			new_slot = cpqhp_slot_create(busnumber);

			if (new_slot == NULL) {
				return(1);
			}

			new_slot->bus = (u8) busnumber;
			new_slot->device = (u8) device;
			new_slot->function = 0;
			new_slot->is_a_board = 0;
			new_slot->presence_save = 0;
			new_slot->switch_save = 0;
		}
	}			// End of FOR loop

	return(0);
}


/*
 * cpqhp_save_slot_config
 *
 * Saves configuration info for all PCI devices in a given slot
 * including subordinate busses.
 *
 * returns 0 if success
 */
int cpqhp_save_slot_config (struct controller *ctrl, struct pci_func * new_slot)
{
	long rc;
	u8 class_code;
	u8 header_type;
	u32 ID;
	u8 secondary_bus;
	int sub_bus;
	int max_functions;
	int function;
	int cloop = 0;
	int stop_it;

	ID = 0xFFFFFFFF;

	ctrl->pci_bus->number = new_slot->bus;
	pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), PCI_VENDOR_ID, &ID);

	if (ID != 0xFFFFFFFF) {	  //  device in slot
		pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), 0x0B, &class_code);
		pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), PCI_HEADER_TYPE, &header_type);

		if (header_type & 0x80)	// Multi-function device
			max_functions = 8;
		else
			max_functions = 1;

		function = 0;

		do {
			if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {	  // PCI-PCI Bridge
				//  Recurse the subordinate bus
				pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_SECONDARY_BUS, &secondary_bus);

				sub_bus = (int) secondary_bus;

				// Save the config headers for the secondary bus.
				rc = cpqhp_save_config(ctrl, sub_bus, 0);
				if (rc)
					return(rc);
				ctrl->pci_bus->number = new_slot->bus;

			}	// End of IF

			new_slot->status = 0;

			for (cloop = 0; cloop < 0x20; cloop++) {
				pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), cloop << 2, (u32 *) & (new_slot-> config_space [cloop]));
			}

			function++;

			stop_it = 0;

			//  this loop skips to the next present function
			//  reading in the Class Code and the Header type.

			while ((function < max_functions) && (!stop_it)) {
				pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_VENDOR_ID, &ID);

				if (ID == 0xFFFFFFFF) {	 // nothing there.
					function++;
				} else {  // Something there
					pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), 0x0B, &class_code);

					pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_HEADER_TYPE, &header_type);

					stop_it++;
				}
			}

		} while (function < max_functions);
	}			// End of IF (device in slot?)
	else {
		return 2;
	}

	return 0;
}


/*
 * cpqhp_save_base_addr_length
 *
 * Saves the length of all base address registers for the
 * specified slot.  this is for hot plug REPLACE
 *
 * returns 0 if success
 */
int cpqhp_save_base_addr_length(struct controller *ctrl, struct pci_func * func)
{
	u8 cloop;
	u8 header_type;
	u8 secondary_bus;
	u8 type;
	int sub_bus;
	u32 temp_register;
	u32 base;
	u32 rc;
	struct pci_func *next;
	int index = 0;
	struct pci_bus *pci_bus = ctrl->pci_bus;
	unsigned int devfn;

	func = cpqhp_slot_find(func->bus, func->device, index++);

	while (func != NULL) {
		pci_bus->number = func->bus;
		devfn = PCI_DEVFN(func->device, func->function);

		// Check for Bridge
		pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);

		if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
			// PCI-PCI Bridge
			pci_bus_read_config_byte (pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus);

			sub_bus = (int) secondary_bus;

			next = cpqhp_slot_list[sub_bus];

			while (next != NULL) {
				rc = cpqhp_save_base_addr_length(ctrl, next);
				if (rc)
					return rc;

				next = next->next;
			}
			pci_bus->number = func->bus;

			//FIXME: this loop is duplicated in the non-bridge case.  The two could be rolled together
			// Figure out IO and memory base lengths
			for (cloop = 0x10; cloop <= 0x14; cloop += 4) {
				temp_register = 0xFFFFFFFF;
				pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
				pci_bus_read_config_dword (pci_bus, devfn, cloop, &base);

				if (base) {  // If this register is implemented
					if (base & 0x01L) {
						// IO base
						// set base = amount of IO space requested
						base = base & 0xFFFFFFFE;
						base = (~base) + 1;

						type = 1;
					} else {
						// memory base
						base = base & 0xFFFFFFF0;
						base = (~base) + 1;

						type = 0;
					}
				} else {
					base = 0x0L;
					type = 0;
				}

				// Save information in slot structure
				func->base_length[(cloop - 0x10) >> 2] =
				base;
				func->base_type[(cloop - 0x10) >> 2] = type;

			}	// End of base register loop


		} else if ((header_type & 0x7F) == 0x00) {	  // PCI-PCI Bridge
			// Figure out IO and memory base lengths
			for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
				temp_register = 0xFFFFFFFF;
				pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
				pci_bus_read_config_dword (pci_bus, devfn, cloop, &base);

				if (base) {  // If this register is implemented
					if (base & 0x01L) {
						// IO base
						// base = amount of IO space requested
						base = base & 0xFFFFFFFE;
						base = (~base) + 1;

						type = 1;
					} else {
						// memory base
						// base = amount of memory space requested
						base = base & 0xFFFFFFF0;
						base = (~base) + 1;

						type = 0;
					}
				} else {
					base = 0x0L;
					type = 0;
				}

				// Save information in slot structure
				func->base_length[(cloop - 0x10) >> 2] = base;
				func->base_type[(cloop - 0x10) >> 2] = type;

			}	// End of base register loop

		} else {	  // Some other unknown header type
		}

		// find the next device in this slot
		func = cpqhp_slot_find(func->bus, func->device, index++);
	}

	return(0);
}


/*
 * cpqhp_save_used_resources
 *
 * Stores used resource information for existing boards.  this is
 * for boards that were in the system when this driver was loaded.
 * this function is for hot plug ADD
 *
 * returns 0 if success
 */
int cpqhp_save_used_resources (struct controller *ctrl, struct pci_func * func)
{
	u8 cloop;
	u8 header_type;
	u8 secondary_bus;
	u8 temp_byte;
	u8 b_base;
	u8 b_length;
	u16 command;
	u16 save_command;
	u16 w_base;
	u16 w_length;
	u32 temp_register;
	u32 save_base;
	u32 base;
	int index = 0;
	struct pci_resource *mem_node;
	struct pci_resource *p_mem_node;
	struct pci_resource *io_node;
	struct pci_resource *bus_node;
	struct pci_bus *pci_bus = ctrl->pci_bus;
	unsigned int devfn;

	func = cpqhp_slot_find(func->bus, func->device, index++);

	while ((func != NULL) && func->is_a_board) {
		pci_bus->number = func->bus;
		devfn = PCI_DEVFN(func->device, func->function);

		// Save the command register
		pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &save_command);

		// disable card
		command = 0x00;
		pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);

		// Check for Bridge
		pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &header_type);

		if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {	  // PCI-PCI Bridge
			// Clear Bridge Control Register
			command = 0x00;
			pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, command);
			pci_bus_read_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus);
			pci_bus_read_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, &temp_byte);

			bus_node = kmalloc(sizeof(*bus_node), GFP_KERNEL);
			if (!bus_node)
				return -ENOMEM;

			bus_node->base = secondary_bus;
			bus_node->length = temp_byte - secondary_bus + 1;

			bus_node->next = func->bus_head;
			func->bus_head = bus_node;

			// Save IO base and Limit registers
			pci_bus_read_config_byte(pci_bus, devfn, PCI_IO_BASE, &b_base);
			pci_bus_read_config_byte(pci_bus, devfn, PCI_IO_LIMIT, &b_length);

			if ((b_base <= b_length) && (save_command & 0x01)) {
				io_node = kmalloc(sizeof(*io_node), GFP_KERNEL);
				if (!io_node)
					return -ENOMEM;

				io_node->base = (b_base & 0xF0) << 8;
				io_node->length = (b_length - b_base + 0x10) << 8;

				io_node->next = func->io_head;
				func->io_head = io_node;
			}

			// Save memory base and Limit registers
			pci_bus_read_config_word(pci_bus, devfn, PCI_MEMORY_BASE, &w_base);
			pci_bus_read_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, &w_length);

			if ((w_base <= w_length) && (save_command & 0x02)) {
				mem_node = kmalloc(sizeof(*mem_node), GFP_KERNEL);
				if (!mem_node)
					return -ENOMEM;

				mem_node->base = w_base << 16;
				mem_node->length = (w_length - w_base + 0x10) << 16;

				mem_node->next = func->mem_head;
				func->mem_head = mem_node;
			}

			// Save prefetchable memory base and Limit registers
			pci_bus_read_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, &w_base);
			pci_bus_read_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &w_length);

			if ((w_base <= w_length) && (save_command & 0x02)) {
				p_mem_node = kmalloc(sizeof(*p_mem_node), GFP_KERNEL);
				if (!p_mem_node)
					return -ENOMEM;

				p_mem_node->base = w_base << 16;
				p_mem_node->length = (w_length - w_base + 0x10) << 16;

				p_mem_node->next = func->p_mem_head;
				func->p_mem_head = p_mem_node;
			}
			// Figure out IO and memory base lengths
			for (cloop = 0x10; cloop <= 0x14; cloop += 4) {
				pci_bus_read_config_dword (pci_bus, devfn, cloop, &save_base);

				temp_register = 0xFFFFFFFF;
				pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
				pci_bus_read_config_dword(pci_bus, devfn, cloop, &base);

				temp_register = base;

				if (base) {  // If this register is implemented
					if (((base & 0x03L) == 0x01)
					    && (save_command & 0x01)) {
						// IO base
						// set temp_register = amount of IO space requested
						temp_register = base & 0xFFFFFFFE;
						temp_register = (~temp_register) + 1;

						io_node = kmalloc(sizeof(*io_node),
								GFP_KERNEL);
						if (!io_node)
							return -ENOMEM;

						io_node->base =
						save_base & (~0x03L);
						io_node->length = temp_register;

						io_node->next = func->io_head;
						func->io_head = io_node;
					} else
						if (((base & 0x0BL) == 0x08)
						    && (save_command & 0x02)) {
						// prefetchable memory base
						temp_register = base & 0xFFFFFFF0;
						temp_register = (~temp_register) + 1;

						p_mem_node = kmalloc(sizeof(*p_mem_node),
								GFP_KERNEL);
						if (!p_mem_node)
							return -ENOMEM;

						p_mem_node->base = save_base & (~0x0FL);
						p_mem_node->length = temp_register;

						p_mem_node->next = func->p_mem_head;
						func->p_mem_head = p_mem_node;
					} else
						if (((base & 0x0BL) == 0x00)
						    && (save_command & 0x02)) {
						// prefetchable memory base
						temp_register = base & 0xFFFFFFF0;
						temp_register = (~temp_register) + 1;

						mem_node = kmalloc(sizeof(*mem_node),
								GFP_KERNEL);
						if (!mem_node)
							return -ENOMEM;

						mem_node->base = save_base & (~0x0FL);
						mem_node->length = temp_register;

						mem_node->next = func->mem_head;
						func->mem_head = mem_node;
					} else
						return(1);
				}
			}	// End of base register loop
		} else if ((header_type & 0x7F) == 0x00) {	  // Standard header
			// Figure out IO and memory base lengths
			for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
				pci_bus_read_config_dword(pci_bus, devfn, cloop, &save_base);

				temp_register = 0xFFFFFFFF;
				pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
				pci_bus_read_config_dword(pci_bus, devfn, cloop, &base);

				temp_register = base;

				if (base) {	  // If this register is implemented
					if (((base & 0x03L) == 0x01)
					    && (save_command & 0x01)) {
						// IO base
						// set temp_register = amount of IO space requested
						temp_register = base & 0xFFFFFFFE;
						temp_register = (~temp_register) + 1;

						io_node = kmalloc(sizeof(*io_node),
								GFP_KERNEL);
						if (!io_node)
							return -ENOMEM;

						io_node->base = save_base & (~0x01L);
						io_node->length = temp_register;

						io_node->next = func->io_head;
						func->io_head = io_node;
					} else
						if (((base & 0x0BL) == 0x08)
						    && (save_command & 0x02)) {
						// prefetchable memory base
						temp_register = base & 0xFFFFFFF0;
						temp_register = (~temp_register) + 1;

						p_mem_node = kmalloc(sizeof(*p_mem_node),
								GFP_KERNEL);
						if (!p_mem_node)
							return -ENOMEM;

						p_mem_node->base = save_base & (~0x0FL);
						p_mem_node->length = temp_register;

						p_mem_node->next = func->p_mem_head;
						func->p_mem_head = p_mem_node;
					} else
						if (((base & 0x0BL) == 0x00)
						    && (save_command & 0x02)) {
						// prefetchable memory base
						temp_register = base & 0xFFFFFFF0;
						temp_register = (~temp_register) + 1;

						mem_node = kmalloc(sizeof(*mem_node),
								GFP_KERNEL);
						if (!mem_node)
							return -ENOMEM;

						mem_node->base = save_base & (~0x0FL);
						mem_node->length = temp_register;

						mem_node->next = func->mem_head;
						func->mem_head = mem_node;
					} else
						return(1);
				}
			}	// End of base register loop
		} else {	  // Some other unknown header type
		}

		// find the next device in this slot
		func = cpqhp_slot_find(func->bus, func->device, index++);
	}

	return(0);
}


/*
 * cpqhp_configure_board
 *
 * Copies saved configuration information to one slot.
 * this is called recursively for bridge devices.
 * this is for hot plug REPLACE!
 *
 * returns 0 if success
 */
int cpqhp_configure_board(struct controller *ctrl, struct pci_func * func)
{
	int cloop;
	u8 header_type;
	u8 secondary_bus;
	int sub_bus;
	struct pci_func *next;
	u32 temp;
	u32 rc;
	int index = 0;
	struct pci_bus *pci_bus = ctrl->pci_bus;
	unsigned int devfn;

	func = cpqhp_slot_find(func->bus, func->device, index++);

	while (func != NULL) {
		pci_bus->number = func->bus;
		devfn = PCI_DEVFN(func->device, func->function);

		// Start at the top of config space so that the control
		// registers are programmed last
		for (cloop = 0x3C; cloop > 0; cloop -= 4) {
			pci_bus_write_config_dword (pci_bus, devfn, cloop, func->config_space[cloop >> 2]);
		}

		pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);

		// If this is a bridge device, restore subordinate devices
		if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {	  // PCI-PCI Bridge
			pci_bus_read_config_byte (pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus);

			sub_bus = (int) secondary_bus;

			next = cpqhp_slot_list[sub_bus];

			while (next != NULL) {
				rc = cpqhp_configure_board(ctrl, next);
				if (rc)
					return rc;

				next = next->next;
			}
		} else {

			// Check all the base Address Registers to make sure
			// they are the same.  If not, the board is different.

			for (cloop = 16; cloop < 40; cloop += 4) {
				pci_bus_read_config_dword (pci_bus, devfn, cloop, &temp);

				if (temp != func->config_space[cloop >> 2]) {
					dbg("Config space compare failure!!! offset = %x\n", cloop);
					dbg("bus = %x, device = %x, function = %x\n", func->bus, func->device, func->function);
					dbg("temp = %x, config space = %x\n\n", temp, func->config_space[cloop >> 2]);
					return 1;
				}
			}
		}

		func->configured = 1;

		func = cpqhp_slot_find(func->bus, func->device, index++);
	}

	return 0;
}


/*
 * cpqhp_valid_replace
 *
 * this function checks to see if a board is the same as the
 * one it is replacing.  this check will detect if the device's
 * vendor or device id's are the same
 *
 * returns 0 if the board is the same nonzero otherwise
 */
int cpqhp_valid_replace(struct controller *ctrl, struct pci_func * func)
{
	u8 cloop;
	u8 header_type;
	u8 secondary_bus;
	u8 type;
	u32 temp_register = 0;
	u32 base;
	u32 rc;
	struct pci_func *next;
	int index = 0;
	struct pci_bus *pci_bus = ctrl->pci_bus;
	unsigned int devfn;

	if (!func->is_a_board)
		return(ADD_NOT_SUPPORTED);

	func = cpqhp_slot_find(func->bus, func->device, index++);

	while (func != NULL) {
		pci_bus->number = func->bus;
		devfn = PCI_DEVFN(func->device, func->function);

		pci_bus_read_config_dword (pci_bus, devfn, PCI_VENDOR_ID, &temp_register);

		// No adapter present
		if (temp_register == 0xFFFFFFFF)
			return(NO_ADAPTER_PRESENT);

		if (temp_register != func->config_space[0])
			return(ADAPTER_NOT_SAME);

		// Check for same revision number and class code
		pci_bus_read_config_dword (pci_bus, devfn, PCI_CLASS_REVISION, &temp_register);

		// Adapter not the same
		if (temp_register != func->config_space[0x08 >> 2])
			return(ADAPTER_NOT_SAME);

		// Check for Bridge
		pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);

		if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {	  // PCI-PCI Bridge
			// In order to continue checking, we must program the
			// bus registers in the bridge to respond to accesses
			// for it's subordinate bus(es)

			temp_register = func->config_space[0x18 >> 2];
			pci_bus_write_config_dword (pci_bus, devfn, PCI_PRIMARY_BUS, temp_register);

			secondary_bus = (temp_register >> 8) & 0xFF;

			next = cpqhp_slot_list[secondary_bus];

			while (next != NULL) {
				rc = cpqhp_valid_replace(ctrl, next);
				if (rc)
					return rc;

				next = next->next;
			}

		}
		// Check to see if it is a standard config header
		else if ((header_type & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
			// Check subsystem vendor and ID
			pci_bus_read_config_dword (pci_bus, devfn, PCI_SUBSYSTEM_VENDOR_ID, &temp_register);

			if (temp_register != func->config_space[0x2C >> 2]) {
				// If it's a SMART-2 and the register isn't filled
				// in, ignore the difference because
				// they just have an old rev of the firmware

				if (!((func->config_space[0] == 0xAE100E11)
				      && (temp_register == 0x00L)))
					return(ADAPTER_NOT_SAME);
			}
			// Figure out IO and memory base lengths
			for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
				temp_register = 0xFFFFFFFF;
				pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
				pci_bus_read_config_dword (pci_bus, devfn, cloop, &base);
				if (base) {	  // If this register is implemented
					if (base & 0x01L) {
						// IO base
						// set base = amount of IO space requested
						base = base & 0xFFFFFFFE;
						base = (~base) + 1;

						type = 1;
					} else {
						// memory base
						base = base & 0xFFFFFFF0;
						base = (~base) + 1;

						type = 0;
					}
				} else {
					base = 0x0L;
					type = 0;
				}

				// Check information in slot structure
				if (func->base_length[(cloop - 0x10) >> 2] != base)
					return(ADAPTER_NOT_SAME);

				if (func->base_type[(cloop - 0x10) >> 2] != type)
					return(ADAPTER_NOT_SAME);

			}	// End of base register loop

		}		// End of (type 0 config space) else
		else {
			// this is not a type 0 or 1 config space header so
			// we don't know how to do it
			return(DEVICE_TYPE_NOT_SUPPORTED);
		}

		// Get the next function
		func = cpqhp_slot_find(func->bus, func->device, index++);
	}


	return 0;
}


/*
 * cpqhp_find_available_resources
 *
 * Finds available memory, IO, and IRQ resources for programming
 * devices which may be added to the system
 * this function is for hot plug ADD!
 *
 * returns 0 if success
 */  
int cpqhp_find_available_resources(struct controller *ctrl, void __iomem *rom_start)
{
	u8 temp;
	u8 populated_slot;
	u8 bridged_slot;
	void __iomem *one_slot;
	void __iomem *rom_resource_table;
	struct pci_func *func = NULL;
	int i = 10, index;
	u32 temp_dword, rc;
	struct pci_resource *mem_node;
	struct pci_resource *p_mem_node;
	struct pci_resource *io_node;
	struct pci_resource *bus_node;

	rom_resource_table = detect_HRT_floating_pointer(rom_start, rom_start+0xffff);
	dbg("rom_resource_table = %p\n", rom_resource_table);

	if (rom_resource_table == NULL) {
		return -ENODEV;
	}
	// Sum all resources and setup resource maps
	unused_IRQ = readl(rom_resource_table + UNUSED_IRQ);
	dbg("unused_IRQ = %x\n", unused_IRQ);

	temp = 0;
	while (unused_IRQ) {
		if (unused_IRQ & 1) {
			cpqhp_disk_irq = temp;
			break;
		}
		unused_IRQ = unused_IRQ >> 1;
		temp++;
	}

	dbg("cpqhp_disk_irq= %d\n", cpqhp_disk_irq);
	unused_IRQ = unused_IRQ >> 1;
	temp++;

	while (unused_IRQ) {
		if (unused_IRQ & 1) {
			cpqhp_nic_irq = temp;
			break;
		}
		unused_IRQ = unused_IRQ >> 1;
		temp++;
	}

	dbg("cpqhp_nic_irq= %d\n", cpqhp_nic_irq);
	unused_IRQ = readl(rom_resource_table + PCIIRQ);

	temp = 0;

	if (!cpqhp_nic_irq) {
		cpqhp_nic_irq = ctrl->cfgspc_irq;
	}

	if (!cpqhp_disk_irq) {
		cpqhp_disk_irq = ctrl->cfgspc_irq;
	}

	dbg("cpqhp_disk_irq, cpqhp_nic_irq= %d, %d\n", cpqhp_disk_irq, cpqhp_nic_irq);

	rc = compaq_nvram_load(rom_start, ctrl);
	if (rc)
		return rc;

	one_slot = rom_resource_table + sizeof (struct hrt);

	i = readb(rom_resource_table + NUMBER_OF_ENTRIES);
	dbg("number_of_entries = %d\n", i);

	if (!readb(one_slot + SECONDARY_BUS))
		return 1;

	dbg("dev|IO base|length|Mem base|length|Pre base|length|PB SB MB\n");

	while (i && readb(one_slot + SECONDARY_BUS)) {
		u8 dev_func = readb(one_slot + DEV_FUNC);
		u8 primary_bus = readb(one_slot + PRIMARY_BUS);
		u8 secondary_bus = readb(one_slot + SECONDARY_BUS);
		u8 max_bus = readb(one_slot + MAX_BUS);
		u16 io_base = readw(one_slot + IO_BASE);
		u16 io_length = readw(one_slot + IO_LENGTH);
		u16 mem_base = readw(one_slot + MEM_BASE);
		u16 mem_length = readw(one_slot + MEM_LENGTH);
		u16 pre_mem_base = readw(one_slot + PRE_MEM_BASE);
		u16 pre_mem_length = readw(one_slot + PRE_MEM_LENGTH);

		dbg("%2.2x | %4.4x  | %4.4x | %4.4x   | %4.4x | %4.4x   | %4.4x |%2.2x %2.2x %2.2x\n",
		    dev_func, io_base, io_length, mem_base, mem_length, pre_mem_base, pre_mem_length,
		    primary_bus, secondary_bus, max_bus);

		// If this entry isn't for our controller's bus, ignore it
		if (primary_bus != ctrl->bus) {
			i--;
			one_slot += sizeof (struct slot_rt);
			continue;
		}
		// find out if this entry is for an occupied slot
		ctrl->pci_bus->number = primary_bus;
		pci_bus_read_config_dword (ctrl->pci_bus, dev_func, PCI_VENDOR_ID, &temp_dword);
		dbg("temp_D_word = %x\n", temp_dword);

		if (temp_dword != 0xFFFFFFFF) {
			index = 0;
			func = cpqhp_slot_find(primary_bus, dev_func >> 3, 0);

			while (func && (func->function != (dev_func & 0x07))) {
				dbg("func = %p (bus, dev, fun) = (%d, %d, %d)\n", func, primary_bus, dev_func >> 3, index);
				func = cpqhp_slot_find(primary_bus, dev_func >> 3, index++);
			}

			// If we can't find a match, skip this table entry
			if (!func) {
				i--;
				one_slot += sizeof (struct slot_rt);
				continue;
			}
			// this may not work and shouldn't be used
			if (secondary_bus != primary_bus)
				bridged_slot = 1;
			else
				bridged_slot = 0;

			populated_slot = 1;
		} else {
			populated_slot = 0;
			bridged_slot = 0;
		}


		// If we've got a valid IO base, use it

		temp_dword = io_base + io_length;

		if ((io_base) && (temp_dword < 0x10000)) {
			io_node = kmalloc(sizeof(*io_node), GFP_KERNEL);
			if (!io_node)
				return -ENOMEM;

			io_node->base = io_base;
			io_node->length = io_length;

			dbg("found io_node(base, length) = %x, %x\n",
					io_node->base, io_node->length);
			dbg("populated slot =%d \n", populated_slot);
			if (!populated_slot) {
				io_node->next = ctrl->io_head;
				ctrl->io_head = io_node;
			} else {
				io_node->next = func->io_head;
				func->io_head = io_node;
			}
		}

		// If we've got a valid memory base, use it
		temp_dword = mem_base + mem_length;
		if ((mem_base) && (temp_dword < 0x10000)) {
			mem_node = kmalloc(sizeof(*mem_node), GFP_KERNEL);
			if (!mem_node)
				return -ENOMEM;

			mem_node->base = mem_base << 16;

			mem_node->length = mem_length << 16;

			dbg("found mem_node(base, length) = %x, %x\n",
					mem_node->base, mem_node->length);
			dbg("populated slot =%d \n", populated_slot);
			if (!populated_slot) {
				mem_node->next = ctrl->mem_head;
				ctrl->mem_head = mem_node;
			} else {
				mem_node->next = func->mem_head;
				func->mem_head = mem_node;
			}
		}

		// If we've got a valid prefetchable memory base, and
		// the base + length isn't greater than 0xFFFF
		temp_dword = pre_mem_base + pre_mem_length;
		if ((pre_mem_base) && (temp_dword < 0x10000)) {
			p_mem_node = kmalloc(sizeof(*p_mem_node), GFP_KERNEL);
			if (!p_mem_node)
				return -ENOMEM;

			p_mem_node->base = pre_mem_base << 16;

			p_mem_node->length = pre_mem_length << 16;
			dbg("found p_mem_node(base, length) = %x, %x\n",
					p_mem_node->base, p_mem_node->length);
			dbg("populated slot =%d \n", populated_slot);

			if (!populated_slot) {
				p_mem_node->next = ctrl->p_mem_head;
				ctrl->p_mem_head = p_mem_node;
			} else {
				p_mem_node->next = func->p_mem_head;
				func->p_mem_head = p_mem_node;
			}
		}

		// If we've got a valid bus number, use it
		// The second condition is to ignore bus numbers on
		// populated slots that don't have PCI-PCI bridges
		if (secondary_bus && (secondary_bus != primary_bus)) {
			bus_node = kmalloc(sizeof(*bus_node), GFP_KERNEL);
			if (!bus_node)
				return -ENOMEM;

			bus_node->base = secondary_bus;
			bus_node->length = max_bus - secondary_bus + 1;
			dbg("found bus_node(base, length) = %x, %x\n",
					bus_node->base, bus_node->length);
			dbg("populated slot =%d \n", populated_slot);
			if (!populated_slot) {
				bus_node->next = ctrl->bus_head;
				ctrl->bus_head = bus_node;
			} else {
				bus_node->next = func->bus_head;
				func->bus_head = bus_node;
			}
		}

		i--;
		one_slot += sizeof (struct slot_rt);
	}

	// If all of the following fail, we don't have any resources for
	// hot plug add
	rc = 1;
	rc &= cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
	rc &= cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
	rc &= cpqhp_resource_sort_and_combine(&(ctrl->io_head));
	rc &= cpqhp_resource_sort_and_combine(&(ctrl->bus_head));

	return rc;
}


/*
 * cpqhp_return_board_resources
 *
 * this routine returns all resources allocated to a board to
 * the available pool.
 *
 * returns 0 if success
 */
int cpqhp_return_board_resources(struct pci_func * func, struct resource_lists * resources)
{
	int rc = 0;
	struct pci_resource *node;
	struct pci_resource *t_node;
	dbg("%s\n", __FUNCTION__);

	if (!func)
		return 1;

	node = func->io_head;
	func->io_head = NULL;
	while (node) {
		t_node = node->next;
		return_resource(&(resources->io_head), node);
		node = t_node;
	}

	node = func->mem_head;
	func->mem_head = NULL;
	while (node) {
		t_node = node->next;
		return_resource(&(resources->mem_head), node);
		node = t_node;
	}

	node = func->p_mem_head;
	func->p_mem_head = NULL;
	while (node) {
		t_node = node->next;
		return_resource(&(resources->p_mem_head), node);
		node = t_node;
	}

	node = func->bus_head;
	func->bus_head = NULL;
	while (node) {
		t_node = node->next;
		return_resource(&(resources->bus_head), node);
		node = t_node;
	}

	rc |= cpqhp_resource_sort_and_combine(&(resources->mem_head));
	rc |= cpqhp_resource_sort_and_combine(&(resources->p_mem_head));
	rc |= cpqhp_resource_sort_and_combine(&(resources->io_head));
	rc |= cpqhp_resource_sort_and_combine(&(resources->bus_head));

	return rc;
}


/*
 * cpqhp_destroy_resource_list
 *
 * Puts node back in the resource list pointed to by head
 */
void cpqhp_destroy_resource_list (struct resource_lists * resources)
{
	struct pci_resource *res, *tres;

	res = resources->io_head;
	resources->io_head = NULL;

	while (res) {
		tres = res;
		res = res->next;
		kfree(tres);
	}

	res = resources->mem_head;
	resources->mem_head = NULL;

	while (res) {
		tres = res;
		res = res->next;
		kfree(tres);
	}

	res = resources->p_mem_head;
	resources->p_mem_head = NULL;

	while (res) {
		tres = res;
		res = res->next;
		kfree(tres);
	}

	res = resources->bus_head;
	resources->bus_head = NULL;

	while (res) {
		tres = res;
		res = res->next;
		kfree(tres);
	}
}


/*
 * cpqhp_destroy_board_resources
 *
 * Puts node back in the resource list pointed to by head
 */
void cpqhp_destroy_board_resources (struct pci_func * func)
{
	struct pci_resource *res, *tres;

	res = func->io_head;
	func->io_head = NULL;

	while (res) {
		tres = res;
		res = res->next;
		kfree(tres);
	}

	res = func->mem_head;
	func->mem_head = NULL;

	while (res) {
		tres = res;
		res = res->next;
		kfree(tres);
	}

	res = func->p_mem_head;
	func->p_mem_head = NULL;

	while (res) {
		tres = res;
		res = res->next;
		kfree(tres);
	}

	res = func->bus_head;
	func->bus_head = NULL;

	while (res) {
		tres = res;
		res = res->next;
		kfree(tres);
	}
}

OpenPOWER on IntegriCloud