aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/pci/hotplug/ibmphp_ebda.c
blob: 7d27631e6e627bba3202633d68ff5578dd84e663 (plain) (blame)
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
/*
 * IBM Hot Plug Controller Driver
 *
 * Written By: Tong Yu, IBM Corporation
 *
 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001-2003 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 <gregkh@us.ibm.com>
 *
 */

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

/*
 * POST builds data blocks(in this data block definition, a char-1
 * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended
 * BIOS Data Area which describe the configuration of the hot-plug
 * controllers and resources used by the PCI Hot-Plug devices.
 *
 * This file walks EBDA, maps data block from physical addr,
 * reconstruct linked lists about all system resource(MEM, PFM, IO)
 * already assigned by POST, as well as linked lists about hot plug
 * controllers (ctlr#, slot#, bus&slot features...)
 */

/* Global lists */
LIST_HEAD (ibmphp_ebda_pci_rsrc_head);
LIST_HEAD (ibmphp_slot_head);

/* Local variables */
static struct ebda_hpc_list *hpc_list_ptr;
static struct ebda_rsrc_list *rsrc_list_ptr;
static struct rio_table_hdr *rio_table_ptr = NULL;
static LIST_HEAD (ebda_hpc_head);
static LIST_HEAD (bus_info_head);
static LIST_HEAD (rio_vg_head);
static LIST_HEAD (rio_lo_head);
static LIST_HEAD (opt_vg_head);
static LIST_HEAD (opt_lo_head);
static void __iomem *io_mem;

/* Local functions */
static int ebda_rsrc_controller (void);
static int ebda_rsrc_rsrc (void);
static int ebda_rio_table (void);

static struct ebda_hpc_list * __init alloc_ebda_hpc_list (void)
{
	return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
}

static struct controller *alloc_ebda_hpc (u32 slot_count, u32 bus_count)
{
	struct controller *controller;
	struct ebda_hpc_slot *slots;
	struct ebda_hpc_bus *buses;

	controller = kzalloc(sizeof(struct controller), GFP_KERNEL);
	if (!controller)
		goto error;

	slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);
	if (!slots)
		goto error_contr;
	controller->slots = slots;

	buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);
	if (!buses)
		goto error_slots;
	controller->buses = buses;

	return controller;
error_slots:
	kfree(controller->slots);
error_contr:
	kfree(controller);
error:
	return NULL;
}

static void free_ebda_hpc (struct controller *controller)
{
	kfree (controller->slots);
	kfree (controller->buses);
	kfree (controller);
}

static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list (void)
{
	return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
}

static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc (void)
{
	return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
}

static void __init print_bus_info (void)
{
	struct bus_info *ptr;
	struct list_head *ptr1;
	
	list_for_each (ptr1, &bus_info_head) {
		ptr = list_entry (ptr1, struct bus_info, bus_info_list);
		debug ("%s - slot_min = %x\n", __func__, ptr->slot_min);
		debug ("%s - slot_max = %x\n", __func__, ptr->slot_max);
		debug ("%s - slot_count = %x\n", __func__, ptr->slot_count);
		debug ("%s - bus# = %x\n", __func__, ptr->busno);
		debug ("%s - current_speed = %x\n", __func__, ptr->current_speed);
		debug ("%s - controller_id = %x\n", __func__, ptr->controller_id);
		
		debug ("%s - slots_at_33_conv = %x\n", __func__, ptr->slots_at_33_conv);
		debug ("%s - slots_at_66_conv = %x\n", __func__, ptr->slots_at_66_conv);
		debug ("%s - slots_at_66_pcix = %x\n", __func__, ptr->slots_at_66_pcix);
		debug ("%s - slots_at_100_pcix = %x\n", __func__, ptr->slots_at_100_pcix);
		debug ("%s - slots_at_133_pcix = %x\n", __func__, ptr->slots_at_133_pcix);

	}
}

static void print_lo_info (void)
{
	struct rio_detail *ptr;
	struct list_head *ptr1;
	debug ("print_lo_info ----\n");	
	list_for_each (ptr1, &rio_lo_head) {
		ptr = list_entry (ptr1, struct rio_detail, rio_detail_list);
		debug ("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
		debug ("%s - rio_type = %x\n", __func__, ptr->rio_type);
		debug ("%s - owner_id = %x\n", __func__, ptr->owner_id);
		debug ("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
		debug ("%s - wpindex = %x\n", __func__, ptr->wpindex);
		debug ("%s - chassis_num = %x\n", __func__, ptr->chassis_num);

	}
}

static void print_vg_info (void)
{
	struct rio_detail *ptr;
	struct list_head *ptr1;
	debug ("%s ---\n", __func__);
	list_for_each (ptr1, &rio_vg_head) {
		ptr = list_entry (ptr1, struct rio_detail, rio_detail_list);
		debug ("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
		debug ("%s - rio_type = %x\n", __func__, ptr->rio_type);
		debug ("%s - owner_id = %x\n", __func__, ptr->owner_id);
		debug ("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
		debug ("%s - wpindex = %x\n", __func__, ptr->wpindex);
		debug ("%s - chassis_num = %x\n", __func__, ptr->chassis_num);

	}
}

static void __init print_ebda_pci_rsrc (void)
{
	struct ebda_pci_rsrc *ptr;
	struct list_head *ptr1;

	list_for_each (ptr1, &ibmphp_ebda_pci_rsrc_head) {
		ptr = list_entry (ptr1, struct ebda_pci_rsrc, ebda_pci_rsrc_list);
		debug ("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 
			__func__, ptr->rsrc_type ,ptr->bus_num, ptr->dev_fun,ptr->start_addr, ptr->end_addr);
	}
}

static void __init print_ibm_slot (void)
{
	struct slot *ptr;
	struct list_head *ptr1;

	list_for_each (ptr1, &ibmphp_slot_head) {
		ptr = list_entry (ptr1, struct slot, ibm_slot_list);
		debug ("%s - slot_number: %x\n", __func__, ptr->number);
	}
}

static void __init print_opt_vg (void)
{
	struct opt_rio *ptr;
	struct list_head *ptr1;
	debug ("%s ---\n", __func__);
	list_for_each (ptr1, &opt_vg_head) {
		ptr = list_entry (ptr1, struct opt_rio, opt_rio_list);
		debug ("%s - rio_type %x\n", __func__, ptr->rio_type);
		debug ("%s - chassis_num: %x\n", __func__, ptr->chassis_num);
		debug ("%s - first_slot_num: %x\n", __func__, ptr->first_slot_num);
		debug ("%s - middle_num: %x\n", __func__, ptr->middle_num);
	}
}

static void __init print_ebda_hpc (void)
{
	struct controller *hpc_ptr;
	struct list_head *ptr1;
	u16 index;

	list_for_each (ptr1, &ebda_hpc_head) {

		hpc_ptr = list_entry (ptr1, struct controller, ebda_hpc_list); 

		for (index = 0; index < hpc_ptr->slot_count; index++) {
			debug ("%s - physical slot#: %x\n", __func__, hpc_ptr->slots[index].slot_num);
			debug ("%s - pci bus# of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_bus_num);
			debug ("%s - index into ctlr addr: %x\n", __func__, hpc_ptr->slots[index].ctl_index);
			debug ("%s - cap of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_cap);
		}

		for (index = 0; index < hpc_ptr->bus_count; index++) {
			debug ("%s - bus# of each bus controlled by this ctlr: %x\n", __func__, hpc_ptr->buses[index].bus_num);
		}

		debug ("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);
		switch (hpc_ptr->ctlr_type) {
		case 1:
			debug ("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus);
			debug ("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun);
			debug ("%s - irq: %x\n", __func__, hpc_ptr->irq);
			break;

		case 0:
			debug ("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start);
			debug ("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end);
			debug ("%s - irq: %x\n", __func__, hpc_ptr->irq);
			break;

		case 2:
		case 4:
			debug ("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar);
			debug ("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr);
			debug ("%s - irq: %x\n", __func__, hpc_ptr->irq);
			break;
		}
	}
}

int __init ibmphp_access_ebda (void)
{
	u8 format, num_ctlrs, rio_complete, hs_complete;
	u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
	int rc = 0;


	rio_complete = 0;
	hs_complete = 0;

	io_mem = ioremap ((0x40 << 4) + 0x0e, 2);
	if (!io_mem )
		return -ENOMEM;
	ebda_seg = readw (io_mem);
	iounmap (io_mem);
	debug ("returned ebda segment: %x\n", ebda_seg);
	
	io_mem = ioremap(ebda_seg<<4, 1024);
	if (!io_mem )
		return -ENOMEM;
	next_offset = 0x180;

	for (;;) {
		offset = next_offset;
		next_offset = readw (io_mem + offset);	/* offset of next blk */

		offset += 2;
		if (next_offset == 0)	/* 0 indicate it's last blk */
			break;
		blk_id = readw (io_mem + offset);	/* this blk id */

		offset += 2;
		/* check if it is hot swap block or rio block */
		if (blk_id != 0x4853 && blk_id != 0x4752)
			continue;
		/* found hs table */
		if (blk_id == 0x4853) {
			debug ("now enter hot swap block---\n");
			debug ("hot blk id: %x\n", blk_id);
			format = readb (io_mem + offset);

			offset += 1;
			if (format != 4)
				goto error_nodev;
			debug ("hot blk format: %x\n", format);
			/* hot swap sub blk */
			base = offset;

			sub_addr = base;
			re = readw (io_mem + sub_addr);	/* next sub blk */

			sub_addr += 2;
			rc_id = readw (io_mem + sub_addr); 	/* sub blk id */

			sub_addr += 2;
			if (rc_id != 0x5243)
				goto error_nodev;
			/* rc sub blk signature  */
			num_ctlrs = readb (io_mem + sub_addr);

			sub_addr += 1;
			hpc_list_ptr = alloc_ebda_hpc_list ();
			if (!hpc_list_ptr) {
				rc = -ENOMEM;
				goto out;
			}
			hpc_list_ptr->format = format;
			hpc_list_ptr->num_ctlrs = num_ctlrs;
			hpc_list_ptr->phys_addr = sub_addr;	/*  offset of RSRC_CONTROLLER blk */
			debug ("info about hpc descriptor---\n");
			debug ("hot blk format: %x\n", format);
			debug ("num of controller: %x\n", num_ctlrs);
			debug ("offset of hpc data structure enteries: %x\n ", sub_addr);

			sub_addr = base + re;	/* re sub blk */
			/* FIXME: rc is never used/checked */
			rc = readw (io_mem + sub_addr);	/* next sub blk */

			sub_addr += 2;
			re_id = readw (io_mem + sub_addr);	/* sub blk id */

			sub_addr += 2;
			if (re_id != 0x5245)
				goto error_nodev;

			/* signature of re */
			num_entries = readw (io_mem + sub_addr);

			sub_addr += 2;	/* offset of RSRC_ENTRIES blk */
			rsrc_list_ptr = alloc_ebda_rsrc_list ();
			if (!rsrc_list_ptr ) {
				rc = -ENOMEM;
				goto out;
			}
			rsrc_list_ptr->format = format;
			rsrc_list_ptr->num_entries = num_entries;
			rsrc_list_ptr->phys_addr = sub_addr;

			debug ("info about rsrc descriptor---\n");
			debug ("format: %x\n", format);
			debug ("num of rsrc: %x\n", num_entries);
			debug ("offset of rsrc data structure enteries: %x\n ", sub_addr);

			hs_complete = 1;
		} else {
		/* found rio table, blk_id == 0x4752 */
			debug ("now enter io table ---\n");
			debug ("rio blk id: %x\n", blk_id);

			rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
			if (!rio_table_ptr)
				return -ENOMEM; 
			rio_table_ptr->ver_num = readb (io_mem + offset);
			rio_table_ptr->scal_count = readb (io_mem + offset + 1);
			rio_table_ptr->riodev_count = readb (io_mem + offset + 2);
			rio_table_ptr->offset = offset +3 ;
			
			debug("info about rio table hdr ---\n");
			debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
				rio_table_ptr->ver_num, rio_table_ptr->scal_count,
				rio_table_ptr->riodev_count, rio_table_ptr->offset);

			rio_complete = 1;
		}
	}

	if (!hs_complete && !rio_complete)
		goto error_nodev;

	if (rio_table_ptr) {
		if (rio_complete && rio_table_ptr->ver_num == 3) {
			rc = ebda_rio_table ();
			if (rc)
				goto out;
		}
	}
	rc = ebda_rsrc_controller ();
	if (rc)
		goto out;

	rc = ebda_rsrc_rsrc ();
	goto out;
error_nodev:
	rc = -ENODEV;
out:
	iounmap (io_mem);
	return rc;
}

/*
 * map info of scalability details and rio details from physical address
 */
static int __init ebda_rio_table (void)
{
	u16 offset;
	u8 i;
	struct rio_detail *rio_detail_ptr;

	offset = rio_table_ptr->offset;
	offset += 12 * rio_table_ptr->scal_count;

	// we do concern about rio details
	for (i = 0; i < rio_table_ptr->riodev_count; i++) {
		rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
		if (!rio_detail_ptr)
			return -ENOMEM;
		rio_detail_ptr->rio_node_id = readb (io_mem + offset);
		rio_detail_ptr->bbar = readl (io_mem + offset + 1);
		rio_detail_ptr->rio_type = readb (io_mem + offset + 5);
		rio_detail_ptr->owner_id = readb (io_mem + offset + 6);
		rio_detail_ptr->port0_node_connect = readb (io_mem + offset + 7);
		rio_detail_ptr->port0_port_connect = readb (io_mem + offset + 8);
		rio_detail_ptr->port1_node_connect = readb (io_mem + offset + 9);
		rio_detail_ptr->port1_port_connect = readb (io_mem + offset + 10);
		rio_detail_ptr->first_slot_num = readb (io_mem + offset + 11);
		rio_detail_ptr->status = readb (io_mem + offset + 12);
		rio_detail_ptr->wpindex = readb (io_mem + offset + 13);
		rio_detail_ptr->chassis_num = readb (io_mem + offset + 14);
//		debug ("rio_node_id: %x\nbbar: %x\nrio_type: %x\nowner_id: %x\nport0_node: %x\nport0_port: %x\nport1_node: %x\nport1_port: %x\nfirst_slot_num: %x\nstatus: %x\n", rio_detail_ptr->rio_node_id, rio_detail_ptr->bbar, rio_detail_ptr->rio_type, rio_detail_ptr->owner_id, rio_detail_ptr->port0_node_connect, rio_detail_ptr->port0_port_connect, rio_detail_ptr->port1_node_connect, rio_detail_ptr->port1_port_connect, rio_detail_ptr->first_slot_num, rio_detail_ptr->status);
		//create linked list of chassis
		if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5) 
			list_add (&rio_detail_ptr->rio_detail_list, &rio_vg_head);
		//create linked list of expansion box				
		else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7) 
			list_add (&rio_detail_ptr->rio_detail_list, &rio_lo_head);
		else 
			// not in my concern
			kfree (rio_detail_ptr);
		offset += 15;
	}
	print_lo_info ();
	print_vg_info ();
	return 0;
}

/*
 * reorganizing linked list of chassis	 
 */
static struct opt_rio *search_opt_vg (u8 chassis_num)
{
	struct opt_rio *ptr;
	struct list_head *ptr1;
	list_for_each (ptr1, &opt_vg_head) {
		ptr = list_entry (ptr1, struct opt_rio, opt_rio_list);
		if (ptr->chassis_num == chassis_num)
			return ptr;
	}		
	return NULL;
}

static int __init combine_wpg_for_chassis (void)
{
	struct opt_rio *opt_rio_ptr = NULL;
	struct rio_detail *rio_detail_ptr = NULL;
	struct list_head *list_head_ptr = NULL;
	
	list_for_each (list_head_ptr, &rio_vg_head) {
		rio_detail_ptr = list_entry (list_head_ptr, struct rio_detail, rio_detail_list);
		opt_rio_ptr = search_opt_vg (rio_detail_ptr->chassis_num);
		if (!opt_rio_ptr) {
			opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
			if (!opt_rio_ptr)
				return -ENOMEM;
			opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
			opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
			opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
			opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
			list_add (&opt_rio_ptr->opt_rio_list, &opt_vg_head);
		} else {	
			opt_rio_ptr->first_slot_num = min (opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
			opt_rio_ptr->middle_num = max (opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
		}	
	}
	print_opt_vg ();
	return 0;	
}	

/*
 * reorgnizing linked list of expansion box	 
 */
static struct opt_rio_lo *search_opt_lo (u8 chassis_num)
{
	struct opt_rio_lo *ptr;
	struct list_head *ptr1;
	list_for_each (ptr1, &opt_lo_head) {
		ptr = list_entry (ptr1, struct opt_rio_lo, opt_rio_lo_list);
		if (ptr->chassis_num == chassis_num)
			return ptr;
	}		
	return NULL;
}

static int combine_wpg_for_expansion (void)
{
	struct opt_rio_lo *opt_rio_lo_ptr = NULL;
	struct rio_detail *rio_detail_ptr = NULL;
	struct list_head *list_head_ptr = NULL;
	
	list_for_each (list_head_ptr, &rio_lo_head) {
		rio_detail_ptr = list_entry (list_head_ptr, struct rio_detail, rio_detail_list);
		opt_rio_lo_ptr = search_opt_lo (rio_detail_ptr->chassis_num);
		if (!opt_rio_lo_ptr) {
			opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
			if (!opt_rio_lo_ptr)
				return -ENOMEM;
			opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
			opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
			opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
			opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
			opt_rio_lo_ptr->pack_count = 1;
			
			list_add (&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
		} else {	
			opt_rio_lo_ptr->first_slot_num = min (opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
			opt_rio_lo_ptr->middle_num = max (opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
			opt_rio_lo_ptr->pack_count = 2;
		}	
	}
	return 0;	
}
	

/* Since we don't know the max slot number per each chassis, hence go
 * through the list of all chassis to find out the range
 * Arguments: slot_num, 1st slot number of the chassis we think we are on, 
 * var (0 = chassis, 1 = expansion box) 
 */
static int first_slot_num (u8 slot_num, u8 first_slot, u8 var)
{
	struct opt_rio *opt_vg_ptr = NULL;
	struct opt_rio_lo *opt_lo_ptr = NULL;
	struct list_head *ptr = NULL;
	int rc = 0;

	if (!var) {
		list_for_each (ptr, &opt_vg_head) {
			opt_vg_ptr = list_entry (ptr, struct opt_rio, opt_rio_list);
			if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) { 
				rc = -ENODEV;
				break;
			}
		}
	} else {
		list_for_each (ptr, &opt_lo_head) {
			opt_lo_ptr = list_entry (ptr, struct opt_rio_lo, opt_rio_lo_list);
			if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
				rc = -ENODEV;
				break;
			}
		}
	}
	return rc;
}

static struct opt_rio_lo * find_rxe_num (u8 slot_num)
{
	struct opt_rio_lo *opt_lo_ptr;
	struct list_head *ptr;

	list_for_each (ptr, &opt_lo_head) {
		opt_lo_ptr = list_entry (ptr, struct opt_rio_lo, opt_rio_lo_list);
		//check to see if this slot_num belongs to expansion box
		if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_lo_ptr->first_slot_num, 1))) 
			return opt_lo_ptr;
	}
	return NULL;
}

static struct opt_rio * find_chassis_num (u8 slot_num)
{
	struct opt_rio *opt_vg_ptr;
	struct list_head *ptr;

	list_for_each (ptr, &opt_vg_head) {
		opt_vg_ptr = list_entry (ptr, struct opt_rio, opt_rio_list);
		//check to see if this slot_num belongs to chassis 
		if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_vg_ptr->first_slot_num, 0))) 
			return opt_vg_ptr;
	}
	return NULL;
}

/* This routine will find out how many slots are in the chassis, so that
 * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
 */
static u8 calculate_first_slot (u8 slot_num)
{
	u8 first_slot = 1;
	struct list_head * list;
	struct slot * slot_cur;
	
	list_for_each (list, &ibmphp_slot_head) {
		slot_cur = list_entry (list, struct slot, ibm_slot_list);
		if (slot_cur->ctrl) {
			if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num)) 
				first_slot = slot_cur->ctrl->ending_slot_num;
		}
	}			
	return first_slot + 1;

}
static char *create_file_name (struct slot * slot_cur)
{
	struct opt_rio *opt_vg_ptr = NULL;
	struct opt_rio_lo *opt_lo_ptr = NULL;
	static char str[30];
	int which = 0; /* rxe = 1, chassis = 0 */
	u8 number = 1; /* either chassis or rxe # */
	u8 first_slot = 1;
	u8 slot_num;
	u8 flag = 0;

	if (!slot_cur) {
		err ("Structure passed is empty\n");
		return NULL;
	}
	
	slot_num = slot_cur->number;

	memset (str, 0, sizeof(str));
	
	if (rio_table_ptr) {
		if (rio_table_ptr->ver_num == 3) {
			opt_vg_ptr = find_chassis_num (slot_num);
			opt_lo_ptr = find_rxe_num (slot_num);
		}
	}
	if (opt_vg_ptr) {
		if (opt_lo_ptr) {
			if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
				number = opt_lo_ptr->chassis_num;
				first_slot = opt_lo_ptr->first_slot_num;
				which = 1; /* it is RXE */
			} else {
				first_slot = opt_vg_ptr->first_slot_num;
				number = opt_vg_ptr->chassis_num;
				which = 0;
			}
		} else {
			first_slot = opt_vg_ptr->first_slot_num;
			number = opt_vg_ptr->chassis_num;
			which = 0;
		}
		++flag;
	} else if (opt_lo_ptr) {
		number = opt_lo_ptr->chassis_num;
		first_slot = opt_lo_ptr->first_slot_num;
		which = 1;
		++flag;
	} else if (rio_table_ptr) {
		if (rio_table_ptr->ver_num == 3) {
			/* if both NULL and we DO have correct RIO table in BIOS */
			return NULL;
		}
	} 
	if (!flag) {
		if (slot_cur->ctrl->ctlr_type == 4) {
			first_slot = calculate_first_slot (slot_num);
			which = 1;
		} else {
			which = 0;
		}
	}

	sprintf(str, "%s%dslot%d",
		which == 0 ? "chassis" : "rxe",
		number, slot_num - first_slot + 1);
	return str;
}

static int fillslotinfo(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot;
	int rc = 0;

	if (!hotplug_slot || !hotplug_slot->private)
		return -EINVAL;

	slot = hotplug_slot->private;
	rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
	if (rc)
		return rc;

	// power - enabled:1  not:0
	hotplug_slot->info->power_status = SLOT_POWER(slot->status);

	// attention - off:0, on:1, blinking:2
	hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status);

	// latch - open:1 closed:0
	hotplug_slot->info->latch_status = SLOT_LATCH(slot->status);

	// pci board - present:1 not:0
	if (SLOT_PRESENT (slot->status))
		hotplug_slot->info->adapter_status = 1;
	else
		hotplug_slot->info->adapter_status = 0;
/*
	if (slot->bus_on->supported_bus_mode
		&& (slot->bus_on->supported_speed == BUS_SPEED_66))
		hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX;
	else
		hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed;
*/

	return rc;
}

static void release_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot;

	if (!hotplug_slot || !hotplug_slot->private)
		return;

	slot = hotplug_slot->private;
	kfree(slot->hotplug_slot->info);
	kfree(slot->hotplug_slot->name);
	kfree(slot->hotplug_slot);
	slot->ctrl = NULL;
	slot->bus_on = NULL;

	/* we don't want to actually remove the resources, since free_resources will do just that */
	ibmphp_unconfigure_card(&slot, -1);

	kfree (slot);
}

static struct pci_driver ibmphp_driver;

/*
 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
 * each hpc from physical address to a list of hot plug controllers based on
 * hpc descriptors.
 */
static int __init ebda_rsrc_controller (void)
{
	u16 addr, addr_slot, addr_bus;
	u8 ctlr_id, temp, bus_index;
	u16 ctlr, slot, bus;
	u16 slot_num, bus_num, index;
	struct hotplug_slot *hp_slot_ptr;
	struct controller *hpc_ptr;
	struct ebda_hpc_bus *bus_ptr;
	struct ebda_hpc_slot *slot_ptr;
	struct bus_info *bus_info_ptr1, *bus_info_ptr2;
	int rc;
	struct slot *tmp_slot;
	struct list_head *list;

	addr = hpc_list_ptr->phys_addr;
	for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
		bus_index = 1;
		ctlr_id = readb (io_mem + addr);
		addr += 1;
		slot_num = readb (io_mem + addr);

		addr += 1;
		addr_slot = addr;	/* offset of slot structure */
		addr += (slot_num * 4);

		bus_num = readb (io_mem + addr);

		addr += 1;
		addr_bus = addr;	/* offset of bus */
		addr += (bus_num * 9);	/* offset of ctlr_type */
		temp = readb (io_mem + addr);

		addr += 1;
		/* init hpc structure */
		hpc_ptr = alloc_ebda_hpc (slot_num, bus_num);
		if (!hpc_ptr ) {
			rc = -ENOMEM;
			goto error_no_hpc;
		}
		hpc_ptr->ctlr_id = ctlr_id;
		hpc_ptr->ctlr_relative_id = ctlr;
		hpc_ptr->slot_count = slot_num;
		hpc_ptr->bus_count = bus_num;
		debug ("now enter ctlr data struture ---\n");
		debug ("ctlr id: %x\n", ctlr_id);
		debug ("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
		debug ("count of slots controlled by this ctlr: %x\n", slot_num);
		debug ("count of buses controlled by this ctlr: %x\n", bus_num);

		/* init slot structure, fetch slot, bus, cap... */
		slot_ptr = hpc_ptr->slots;
		for (slot = 0; slot < slot_num; slot++) {
			slot_ptr->slot_num = readb (io_mem + addr_slot);
			slot_ptr->slot_bus_num = readb (io_mem + addr_slot + slot_num);
			slot_ptr->ctl_index = readb (io_mem + addr_slot + 2*slot_num);
			slot_ptr->slot_cap = readb (io_mem + addr_slot + 3*slot_num);

			// create bus_info lined list --- if only one slot per bus: slot_min = slot_max 

			bus_info_ptr2 = ibmphp_find_same_bus_num (slot_ptr->slot_bus_num);
			if (!bus_info_ptr2) {
				bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
				if (!bus_info_ptr1) {
					rc = -ENOMEM;
					goto error_no_hp_slot;
				}
				bus_info_ptr1->slot_min = slot_ptr->slot_num;
				bus_info_ptr1->slot_max = slot_ptr->slot_num;
				bus_info_ptr1->slot_count += 1;
				bus_info_ptr1->busno = slot_ptr->slot_bus_num;
				bus_info_ptr1->index = bus_index++;
				bus_info_ptr1->current_speed = 0xff;
				bus_info_ptr1->current_bus_mode = 0xff;
				
				bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
				
				list_add_tail (&bus_info_ptr1->bus_info_list, &bus_info_head);

			} else {
				bus_info_ptr2->slot_min = min (bus_info_ptr2->slot_min, slot_ptr->slot_num);
				bus_info_ptr2->slot_max = max (bus_info_ptr2->slot_max, slot_ptr->slot_num);
				bus_info_ptr2->slot_count += 1;

			}

			// end of creating the bus_info linked list

			slot_ptr++;
			addr_slot += 1;
		}

		/* init bus structure */
		bus_ptr = hpc_ptr->buses;
		for (bus = 0; bus < bus_num; bus++) {
			bus_ptr->bus_num = readb (io_mem + addr_bus + bus);
			bus_ptr->slots_at_33_conv = readb (io_mem + addr_bus + bus_num + 8 * bus);
			bus_ptr->slots_at_66_conv = readb (io_mem + addr_bus + bus_num + 8 * bus + 1);

			bus_ptr->slots_at_66_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 2);

			bus_ptr->slots_at_100_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 3);

			bus_ptr->slots_at_133_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 4);

			bus_info_ptr2 = ibmphp_find_same_bus_num (bus_ptr->bus_num);
			if (bus_info_ptr2) {
				bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
				bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
				bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
				bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
				bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix; 
			}
			bus_ptr++;
		}

		hpc_ptr->ctlr_type = temp;

		switch (hpc_ptr->ctlr_type) {
			case 1:
				hpc_ptr->u.pci_ctlr.bus = readb (io_mem + addr);
				hpc_ptr->u.pci_ctlr.dev_fun = readb (io_mem + addr + 1);
				hpc_ptr->irq = readb (io_mem + addr + 2);
				addr += 3;
				debug ("ctrl bus = %x, ctlr devfun = %x, irq = %x\n", 
					hpc_ptr->u.pci_ctlr.bus,
					hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
				break;

			case 0:
				hpc_ptr->u.isa_ctlr.io_start = readw (io_mem + addr);
				hpc_ptr->u.isa_ctlr.io_end = readw (io_mem + addr + 2);
				if (!request_region (hpc_ptr->u.isa_ctlr.io_start,
						     (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
						     "ibmphp")) {
					rc = -ENODEV;
					goto error_no_hp_slot;
				}
				hpc_ptr->irq = readb (io_mem + addr + 4);
				addr += 5;
				break;

			case 2:
			case 4:
				hpc_ptr->u.wpeg_ctlr.wpegbbar = readl (io_mem + addr);
				hpc_ptr->u.wpeg_ctlr.i2c_addr = readb (io_mem + addr + 4);
				hpc_ptr->irq = readb (io_mem + addr + 5);
				addr += 6;
				break;
			default:
				rc = -ENODEV;
				goto error_no_hp_slot;
		}

		//reorganize chassis' linked list
		combine_wpg_for_chassis ();
		combine_wpg_for_expansion ();
		hpc_ptr->revision = 0xff;
		hpc_ptr->options = 0xff;
		hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
		hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;

		// register slots with hpc core as well as create linked list of ibm slot
		for (index = 0; index < hpc_ptr->slot_count; index++) {

			hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
			if (!hp_slot_ptr) {
				rc = -ENOMEM;
				goto error_no_hp_slot;
			}

			hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
			if (!hp_slot_ptr->info) {
				rc = -ENOMEM;
				goto error_no_hp_info;
			}

			hp_slot_ptr->name = kmalloc(30, GFP_KERNEL);
			if (!hp_slot_ptr->name) {
				rc = -ENOMEM;
				goto error_no_hp_name;
			}

			tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
			if (!tmp_slot) {
				rc = -ENOMEM;
				goto error_no_slot;
			}

			tmp_slot->flag = 1;

			tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
			if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
				tmp_slot->supported_speed =  3;
			else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
				tmp_slot->supported_speed =  2;
			else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
				tmp_slot->supported_speed =  1;
				
			if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
				tmp_slot->supported_bus_mode = 1;
			else
				tmp_slot->supported_bus_mode = 0;


			tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;

			bus_info_ptr1 = ibmphp_find_same_bus_num (hpc_ptr->slots[index].slot_bus_num);
			if (!bus_info_ptr1) {
				kfree(tmp_slot);
				rc = -ENODEV;
				goto error;
			}
			tmp_slot->bus_on = bus_info_ptr1;
			bus_info_ptr1 = NULL;
			tmp_slot->ctrl = hpc_ptr;

			tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
			tmp_slot->number = hpc_ptr->slots[index].slot_num;
			tmp_slot->hotplug_slot = hp_slot_ptr;

			hp_slot_ptr->private = tmp_slot;
			hp_slot_ptr->release = release_slot;

			rc = fillslotinfo(hp_slot_ptr);
			if (rc)
				goto error;

			rc = ibmphp_init_devno ((struct slot **) &hp_slot_ptr->private);
			if (rc)
				goto error;
			hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops;

			// end of registering ibm slot with hotplug core

			list_add (& ((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head);
		}

		print_bus_info ();
		list_add (&hpc_ptr->ebda_hpc_list, &ebda_hpc_head );

	}			/* each hpc  */

	list_for_each (list, &ibmphp_slot_head) {
		tmp_slot = list_entry (list, struct slot, ibm_slot_list);

		snprintf (tmp_slot->hotplug_slot->name, 30, "%s", create_file_name (tmp_slot));
		pci_hp_register(tmp_slot->hotplug_slot,
			pci_find_bus(0, tmp_slot->bus), tmp_slot->device);
	}

	print_ebda_hpc ();
	print_ibm_slot ();
	return 0;

error:
	kfree (hp_slot_ptr->private);
error_no_slot:
	kfree (hp_slot_ptr->name);
error_no_hp_name:
	kfree (hp_slot_ptr->info);
error_no_hp_info:
	kfree (hp_slot_ptr);
error_no_hp_slot:
	free_ebda_hpc (hpc_ptr);
error_no_hpc:
	iounmap (io_mem);
	return rc;
}

/* 
 * map info (bus, devfun, start addr, end addr..) of i/o, memory,
 * pfm from the physical addr to a list of resource.
 */
static int __init ebda_rsrc_rsrc (void)
{
	u16 addr;
	short rsrc;
	u8 type, rsrc_type;
	struct ebda_pci_rsrc *rsrc_ptr;

	addr = rsrc_list_ptr->phys_addr;
	debug ("now entering rsrc land\n");
	debug ("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);

	for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
		type = readb (io_mem + addr);

		addr += 1;
		rsrc_type = type & EBDA_RSRC_TYPE_MASK;

		if (rsrc_type == EBDA_IO_RSRC_TYPE) {
			rsrc_ptr = alloc_ebda_pci_rsrc ();
			if (!rsrc_ptr) {
				iounmap (io_mem);
				return -ENOMEM;
			}
			rsrc_ptr->rsrc_type = type;

			rsrc_ptr->bus_num = readb (io_mem + addr);
			rsrc_ptr->dev_fun = readb (io_mem + addr + 1);
			rsrc_ptr->start_addr = readw (io_mem + addr + 2);
			rsrc_ptr->end_addr = readw (io_mem + addr + 4);
			addr += 6;

			debug ("rsrc from io type ----\n");
			debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
				rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);

			list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
		}

		if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
			rsrc_ptr = alloc_ebda_pci_rsrc ();
			if (!rsrc_ptr ) {
				iounmap (io_mem);
				return -ENOMEM;
			}
			rsrc_ptr->rsrc_type = type;

			rsrc_ptr->bus_num = readb (io_mem + addr);
			rsrc_ptr->dev_fun = readb (io_mem + addr + 1);
			rsrc_ptr->start_addr = readl (io_mem + addr + 2);
			rsrc_ptr->end_addr = readl (io_mem + addr + 6);
			addr += 10;

			debug ("rsrc from mem or pfm ---\n");
			debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 
				rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);

			list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
		}
	}
	kfree (rsrc_list_ptr);
	rsrc_list_ptr = NULL;
	print_ebda_pci_rsrc ();
	return 0;
}

u16 ibmphp_get_total_controllers (void)
{
	return hpc_list_ptr->num_ctlrs;
}

struct slot *ibmphp_get_slot_from_physical_num (u8 physical_num)
{
	struct slot *slot;
	struct list_head *list;

	list_for_each (list, &ibmphp_slot_head) {
		slot = list_entry (list, struct slot, ibm_slot_list);
		if (slot->number == physical_num)
			return slot;
	}
	return NULL;
}

/* To find:
 *	- the smallest slot number
 *	- the largest slot number
 *	- the total number of the slots based on each bus
 *	  (if only one slot per bus slot_min = slot_max )
 */
struct bus_info *ibmphp_find_same_bus_num (u32 num)
{
	struct bus_info *ptr;
	struct list_head  *ptr1;

	list_for_each (ptr1, &bus_info_head) {
		ptr = list_entry (ptr1, struct bus_info, bus_info_list); 
		if (ptr->busno == num) 
			 return ptr;
	}
	return NULL;
}

/*  Finding relative bus number, in order to map corresponding
 *  bus register
 */
int ibmphp_get_bus_index (u8 num)
{
	struct bus_info *ptr;
	struct list_head  *ptr1;

	list_for_each (ptr1, &bus_info_head) {
		ptr = list_entry (ptr1, struct bus_info, bus_info_list);
		if (ptr->busno == num)  
			return ptr->index;
	}
	return -ENODEV;
}

void ibmphp_free_bus_info_queue (void)
{
	struct bus_info *bus_info;
	struct list_head *list;
	struct list_head *next;

	list_for_each_safe (list, next, &bus_info_head ) {
		bus_info = list_entry (list, struct bus_info, bus_info_list);
		kfree (bus_info);
	}
}

void ibmphp_free_ebda_hpc_queue (void)
{
	struct controller *controller = NULL;
	struct list_head *list;
	struct list_head *next;
	int pci_flag = 0;

	list_for_each_safe (list, next, &ebda_hpc_head) {
		controller = list_entry (list, struct controller, ebda_hpc_list);
		if (controller->ctlr_type == 0)
			release_region (controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
		else if ((controller->ctlr_type == 1) && (!pci_flag)) {
			++pci_flag;
			pci_unregister_driver (&ibmphp_driver);
		}
		free_ebda_hpc (controller);
	}
}

void ibmphp_free_ebda_pci_rsrc_queue (void)
{
	struct ebda_pci_rsrc *resource;
	struct list_head *list;
	struct list_head *next;

	list_for_each_safe (list, next, &ibmphp_ebda_pci_rsrc_head) {
		resource = list_entry (list, struct ebda_pci_rsrc, ebda_pci_rsrc_list);
		kfree (resource);
		resource = NULL;
	}
}

static struct pci_device_id id_table[] = {
	{
		.vendor		= PCI_VENDOR_ID_IBM,
		.device		= HPC_DEVICE_ID,
		.subvendor	= PCI_VENDOR_ID_IBM,
		.subdevice	= HPC_SUBSYSTEM_ID,
		.class		= ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
	}, {}
};		

MODULE_DEVICE_TABLE(pci, id_table);

static int ibmphp_probe (struct pci_dev *, const struct pci_device_id *);
static struct pci_driver ibmphp_driver = {
	.name		= "ibmphp",
	.id_table	= id_table,
	.probe		= ibmphp_probe,
};

int ibmphp_register_pci (void)
{
	struct controller *ctrl;
	struct list_head *tmp;
	int rc = 0;

	list_for_each (tmp, &ebda_hpc_head) {
		ctrl = list_entry (tmp, struct controller, ebda_hpc_list);
		if (ctrl->ctlr_type == 1) {
			rc = pci_register_driver(&ibmphp_driver);
			break;
		}
	}
	return rc;
}
static int ibmphp_probe (struct pci_dev * dev, const struct pci_device_id *ids)
{
	struct controller *ctrl;
	struct list_head *tmp;

	debug ("inside ibmphp_probe\n");
	
	list_for_each (tmp, &ebda_hpc_head) {
		ctrl = list_entry (tmp, struct controller, ebda_hpc_list);
		if (ctrl->ctlr_type == 1) {
			if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
				ctrl->ctrl_dev = dev;
				debug ("found device!!!\n");
				debug ("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
				return 0;
			}
		}
	}
	return -ENODEV;
}