summaryrefslogtreecommitdiff
path: root/drivers/message/i2o/iop.c
blob: 61b837de4b6a134756e5af4eb0892b9a8c318685 (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
/*
 *	Functions to handle I2O controllers and I2O message handling
 *
 *	Copyright (C) 1999-2002	Red Hat Software
 *
 *	Written by Alan Cox, Building Number Three Ltd
 *
 *	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.
 *
 *	A lot of the I2O message side code from this is taken from the
 *	Red Creek RCPCI45 adapter driver by Red Creek Communications
 *
 *	Fixes/additions:
 *		Philipp Rumpf
 *		Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI>
 *		Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI>
 *		Deepak Saxena <deepak@plexity.net>
 *		Boji T Kannanthanam <boji.t.kannanthanam@intel.com>
 *		Alan Cox <alan@redhat.com>:
 *			Ported to Linux 2.5.
 *		Markus Lidel <Markus.Lidel@shadowconnect.com>:
 *			Minor fixes for 2.6.
 */

#include <linux/module.h>
#include <linux/i2o.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include "core.h"

#define OSM_NAME	"i2o"
#define OSM_VERSION	"1.288"
#define OSM_DESCRIPTION	"I2O subsystem"

/* global I2O controller list */
LIST_HEAD(i2o_controllers);

/*
 * global I2O System Table. Contains information about all the IOPs in the
 * system. Used to inform IOPs about each others existence.
 */
static struct i2o_dma i2o_systab;

static int i2o_hrt_get(struct i2o_controller *c);

/**
 *	i2o_msg_nop - Returns a message which is not used
 *	@c: I2O controller from which the message was created
 *	@m: message which should be returned
 *
 *	If you fetch a message via i2o_msg_get, and can't use it, you must
 *	return the message with this function. Otherwise the message frame
 *	is lost.
 */
void i2o_msg_nop(struct i2o_controller *c, u32 m)
{
	struct i2o_message __iomem *msg = i2o_msg_in_to_virt(c, m);

	writel(THREE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
	writel(I2O_CMD_UTIL_NOP << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);
	writel(0, &msg->u.head[2]);
	writel(0, &msg->u.head[3]);
	i2o_msg_post(c, m);
};

/**
 *	i2o_msg_get_wait - obtain an I2O message from the IOP
 *	@c: I2O controller
 *	@msg: pointer to a I2O message pointer
 *	@wait: how long to wait until timeout
 *
 *	This function waits up to wait seconds for a message slot to be
 *	available.
 *
 *	On a success the message is returned and the pointer to the message is
 *	set in msg. The returned message is the physical page frame offset
 *	address from the read port (see the i2o spec). If no message is
 *	available returns I2O_QUEUE_EMPTY and msg is leaved untouched.
 */
u32 i2o_msg_get_wait(struct i2o_controller *c,
		     struct i2o_message __iomem ** msg, int wait)
{
	unsigned long timeout = jiffies + wait * HZ;
	u32 m;

	while ((m = i2o_msg_get(c, msg)) == I2O_QUEUE_EMPTY) {
		if (time_after(jiffies, timeout)) {
			osm_debug("%s: Timeout waiting for message frame.\n",
				  c->name);
			return I2O_QUEUE_EMPTY;
		}
		set_current_state(TASK_UNINTERRUPTIBLE);
		schedule_timeout(1);
	}

	return m;
};

#if BITS_PER_LONG == 64
/**
 *      i2o_cntxt_list_add - Append a pointer to context list and return a id
 *	@c: controller to which the context list belong
 *	@ptr: pointer to add to the context list
 *
 *	Because the context field in I2O is only 32-bit large, on 64-bit the
 *	pointer is to large to fit in the context field. The i2o_cntxt_list
 *	functions therefore map pointers to context fields.
 *
 *	Returns context id > 0 on success or 0 on failure.
 */
u32 i2o_cntxt_list_add(struct i2o_controller * c, void *ptr)
{
	struct i2o_context_list_element *entry;
	unsigned long flags;

	if (!ptr)
		osm_err("%s: couldn't add NULL pointer to context list!\n",
			c->name);

	entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
	if (!entry) {
		osm_err("%s: Could not allocate memory for context list element"
			"\n", c->name);
		return 0;
	}

	entry->ptr = ptr;
	entry->timestamp = jiffies;
	INIT_LIST_HEAD(&entry->list);

	spin_lock_irqsave(&c->context_list_lock, flags);

	if (unlikely(atomic_inc_and_test(&c->context_list_counter)))
		atomic_inc(&c->context_list_counter);

	entry->context = atomic_read(&c->context_list_counter);

	list_add(&entry->list, &c->context_list);

	spin_unlock_irqrestore(&c->context_list_lock, flags);

	osm_debug("%s: Add context to list %p -> %d\n", c->name, ptr, context);

	return entry->context;
};

/**
 *      i2o_cntxt_list_remove - Remove a pointer from the context list
 *	@c: controller to which the context list belong
 *	@ptr: pointer which should be removed from the context list
 *
 *	Removes a previously added pointer from the context list and returns
 *	the matching context id.
 *
 *	Returns context id on succes or 0 on failure.
 */
u32 i2o_cntxt_list_remove(struct i2o_controller * c, void *ptr)
{
	struct i2o_context_list_element *entry;
	u32 context = 0;
	unsigned long flags;

	spin_lock_irqsave(&c->context_list_lock, flags);
	list_for_each_entry(entry, &c->context_list, list)
	    if (entry->ptr == ptr) {
		list_del(&entry->list);
		context = entry->context;
		kfree(entry);
		break;
	}
	spin_unlock_irqrestore(&c->context_list_lock, flags);

	if (!context)
		osm_warn("%s: Could not remove nonexistent ptr %p\n", c->name,
			 ptr);

	osm_debug("%s: remove ptr from context list %d -> %p\n", c->name,
		  context, ptr);

	return context;
};

/**
 *      i2o_cntxt_list_get - Get a pointer from the context list and remove it
 *	@c: controller to which the context list belong
 *	@context: context id to which the pointer belong
 *
 *	Returns pointer to the matching context id on success or NULL on
 *	failure.
 */
void *i2o_cntxt_list_get(struct i2o_controller *c, u32 context)
{
	struct i2o_context_list_element *entry;
	unsigned long flags;
	void *ptr = NULL;

	spin_lock_irqsave(&c->context_list_lock, flags);
	list_for_each_entry(entry, &c->context_list, list)
	    if (entry->context == context) {
		list_del(&entry->list);
		ptr = entry->ptr;
		kfree(entry);
		break;
	}
	spin_unlock_irqrestore(&c->context_list_lock, flags);

	if (!ptr)
		osm_warn("%s: context id %d not found\n", c->name, context);

	osm_debug("%s: get ptr from context list %d -> %p\n", c->name, context,
		  ptr);

	return ptr;
};

/**
 *      i2o_cntxt_list_get_ptr - Get a context id from the context list
 *	@c: controller to which the context list belong
 *	@ptr: pointer to which the context id should be fetched
 *
 *	Returns context id which matches to the pointer on succes or 0 on
 *	failure.
 */
u32 i2o_cntxt_list_get_ptr(struct i2o_controller * c, void *ptr)
{
	struct i2o_context_list_element *entry;
	u32 context = 0;
	unsigned long flags;

	spin_lock_irqsave(&c->context_list_lock, flags);
	list_for_each_entry(entry, &c->context_list, list)
	    if (entry->ptr == ptr) {
		context = entry->context;
		break;
	}
	spin_unlock_irqrestore(&c->context_list_lock, flags);

	if (!context)
		osm_warn("%s: Could not find nonexistent ptr %p\n", c->name,
			 ptr);

	osm_debug("%s: get context id from context list %p -> %d\n", c->name,
		  ptr, context);

	return context;
};
#endif

/**
 *	i2o_iop_find - Find an I2O controller by id
 *	@unit: unit number of the I2O controller to search for
 *
 *	Lookup the I2O controller on the controller list.
 *
 *	Returns pointer to the I2O controller on success or NULL if not found.
 */
struct i2o_controller *i2o_find_iop(int unit)
{
	struct i2o_controller *c;

	list_for_each_entry(c, &i2o_controllers, list) {
		if (c->unit == unit)
			return c;
	}

	return NULL;
};

/**
 *	i2o_iop_find_device - Find a I2O device on an I2O controller
 *	@c: I2O controller where the I2O device hangs on
 *	@tid: TID of the I2O device to search for
 *
 *	Searches the devices of the I2O controller for a device with TID tid and
 *	returns it.
 *
 *	Returns a pointer to the I2O device if found, otherwise NULL.
 */
struct i2o_device *i2o_iop_find_device(struct i2o_controller *c, u16 tid)
{
	struct i2o_device *dev;

	list_for_each_entry(dev, &c->devices, list)
	    if (dev->lct_data.tid == tid)
		return dev;

	return NULL;
};

/**
 *	i2o_quiesce_controller - quiesce controller
 *	@c: controller
 *
 *	Quiesce an IOP. Causes IOP to make external operation quiescent
 *	(i2o 'READY' state). Internal operation of the IOP continues normally.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int i2o_iop_quiesce(struct i2o_controller *c)
{
	struct i2o_message __iomem *msg;
	u32 m;
	i2o_status_block *sb = c->status_block.virt;
	int rc;

	i2o_status_get(c);

	/* SysQuiesce discarded if IOP not in READY or OPERATIONAL state */
	if ((sb->iop_state != ADAPTER_STATE_READY) &&
	    (sb->iop_state != ADAPTER_STATE_OPERATIONAL))
		return 0;

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -ETIMEDOUT;

	writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
	writel(I2O_CMD_SYS_QUIESCE << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);

	/* Long timeout needed for quiesce if lots of devices */
	if ((rc = i2o_msg_post_wait(c, m, 240)))
		osm_info("%s: Unable to quiesce (status=%#x).\n", c->name, -rc);
	else
		osm_debug("%s: Quiesced.\n", c->name);

	i2o_status_get(c);	// Entered READY state

	return rc;
};

/**
 *	i2o_iop_enable - move controller from ready to OPERATIONAL
 *	@c: I2O controller
 *
 *	Enable IOP. This allows the IOP to resume external operations and
 *	reverses the effect of a quiesce. Returns zero or an error code if
 *	an error occurs.
 */
static int i2o_iop_enable(struct i2o_controller *c)
{
	struct i2o_message __iomem *msg;
	u32 m;
	i2o_status_block *sb = c->status_block.virt;
	int rc;

	i2o_status_get(c);

	/* Enable only allowed on READY state */
	if (sb->iop_state != ADAPTER_STATE_READY)
		return -EINVAL;

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -ETIMEDOUT;

	writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
	writel(I2O_CMD_SYS_ENABLE << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);

	/* How long of a timeout do we need? */
	if ((rc = i2o_msg_post_wait(c, m, 240)))
		osm_err("%s: Could not enable (status=%#x).\n", c->name, -rc);
	else
		osm_debug("%s: Enabled.\n", c->name);

	i2o_status_get(c);	// entered OPERATIONAL state

	return rc;
};

/**
 *	i2o_iop_quiesce_all - Quiesce all I2O controllers on the system
 *
 *	Quiesce all I2O controllers which are connected to the system.
 */
static inline void i2o_iop_quiesce_all(void)
{
	struct i2o_controller *c, *tmp;

	list_for_each_entry_safe(c, tmp, &i2o_controllers, list) {
		if (!c->no_quiesce)
			i2o_iop_quiesce(c);
	}
};

/**
 *	i2o_iop_enable_all - Enables all controllers on the system
 *
 *	Enables all I2O controllers which are connected to the system.
 */
static inline void i2o_iop_enable_all(void)
{
	struct i2o_controller *c, *tmp;

	list_for_each_entry_safe(c, tmp, &i2o_controllers, list)
	    i2o_iop_enable(c);
};

/**
 *	i2o_clear_controller - Bring I2O controller into HOLD state
 *	@c: controller
 *
 *	Clear an IOP to HOLD state, ie. terminate external operations, clear all
 *	input queues and prepare for a system restart. IOP's internal operation
 *	continues normally and the outbound queue is alive. The IOP is not
 *	expected to rebuild its LCT.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int i2o_iop_clear(struct i2o_controller *c)
{
	struct i2o_message __iomem *msg;
	u32 m;
	int rc;

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -ETIMEDOUT;

	/* Quiesce all IOPs first */
	i2o_iop_quiesce_all();

	writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
	writel(I2O_CMD_ADAPTER_CLEAR << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);

	if ((rc = i2o_msg_post_wait(c, m, 30)))
		osm_info("%s: Unable to clear (status=%#x).\n", c->name, -rc);
	else
		osm_debug("%s: Cleared.\n", c->name);

	/* Enable all IOPs */
	i2o_iop_enable_all();

	return rc;
}

/**
 *	i2o_iop_init_outbound_queue - setup the outbound message queue
 *	@c: I2O controller
 *
 *	Clear and (re)initialize IOP's outbound queue and post the message
 *	frames to the IOP.
 *
 *	Returns 0 on success or a negative errno code on failure.
 */
static int i2o_iop_init_outbound_queue(struct i2o_controller *c)
{
	volatile u8 *status = c->status.virt;
	u32 m;
	struct i2o_message __iomem *msg;
	ulong timeout;
	int i;

	osm_debug("%s: Initializing Outbound Queue...\n", c->name);

	memset(c->status.virt, 0, 4);

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -ETIMEDOUT;

	writel(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6, &msg->u.head[0]);
	writel(I2O_CMD_OUTBOUND_INIT << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);
	writel(i2o_exec_driver.context, &msg->u.s.icntxt);
	writel(0x00000000, &msg->u.s.tcntxt);
	writel(PAGE_SIZE, &msg->body[0]);
	/* Outbound msg frame size in words and Initcode */
	writel(I2O_OUTBOUND_MSG_FRAME_SIZE << 16 | 0x80, &msg->body[1]);
	writel(0xd0000004, &msg->body[2]);
	writel(i2o_dma_low(c->status.phys), &msg->body[3]);
	writel(i2o_dma_high(c->status.phys), &msg->body[4]);

	i2o_msg_post(c, m);

	timeout = jiffies + I2O_TIMEOUT_INIT_OUTBOUND_QUEUE * HZ;
	while (*status <= I2O_CMD_IN_PROGRESS) {
		if (time_after(jiffies, timeout)) {
			osm_warn("%s: Timeout Initializing\n", c->name);
			return -ETIMEDOUT;
		}
		set_current_state(TASK_UNINTERRUPTIBLE);
		schedule_timeout(1);
	}

	m = c->out_queue.phys;

	/* Post frames */
	for (i = 0; i < I2O_MAX_OUTBOUND_MSG_FRAMES; i++) {
		i2o_flush_reply(c, m);
		udelay(1);	/* Promise */
		m += I2O_OUTBOUND_MSG_FRAME_SIZE * sizeof(u32);
	}

	return 0;
}

/**
 *	i2o_iop_reset - reset an I2O controller
 *	@c: controller to reset
 *
 *	Reset the IOP into INIT state and wait until IOP gets into RESET state.
 *	Terminate all external operations, clear IOP's inbound and outbound
 *	queues, terminate all DDMs, and reload the IOP's operating environment
 *	and all local DDMs. The IOP rebuilds its LCT.
 */
static int i2o_iop_reset(struct i2o_controller *c)
{
	volatile u8 *status = c->status.virt;
	struct i2o_message __iomem *msg;
	u32 m;
	unsigned long timeout;
	i2o_status_block *sb = c->status_block.virt;
	int rc = 0;

	osm_debug("%s: Resetting controller\n", c->name);

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -ETIMEDOUT;

	memset(c->status_block.virt, 0, 8);

	/* Quiesce all IOPs first */
	i2o_iop_quiesce_all();

	writel(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
	writel(I2O_CMD_ADAPTER_RESET << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);
	writel(i2o_exec_driver.context, &msg->u.s.icntxt);
	writel(0, &msg->u.s.tcntxt);	//FIXME: use reasonable transaction context
	writel(0, &msg->body[0]);
	writel(0, &msg->body[1]);
	writel(i2o_dma_low(c->status.phys), &msg->body[2]);
	writel(i2o_dma_high(c->status.phys), &msg->body[3]);

	i2o_msg_post(c, m);

	/* Wait for a reply */
	timeout = jiffies + I2O_TIMEOUT_RESET * HZ;
	while (!*status) {
		if (time_after(jiffies, timeout))
			break;

		set_current_state(TASK_UNINTERRUPTIBLE);
		schedule_timeout(1);
	}

	switch (*status) {
	case I2O_CMD_REJECTED:
		osm_warn("%s: IOP reset rejected\n", c->name);
		rc = -EPERM;
		break;

	case I2O_CMD_IN_PROGRESS:
		/*
		 * Once the reset is sent, the IOP goes into the INIT state
		 * which is indeterminate. We need to wait until the IOP has
		 * rebooted before we can let the system talk to it. We read
		 * the inbound Free_List until a message is available. If we
		 * can't read one in the given ammount of time, we assume the
		 * IOP could not reboot properly.
		 */
		osm_debug("%s: Reset in progress, waiting for reboot...\n",
			  c->name);

		m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_RESET);
		while (m == I2O_QUEUE_EMPTY) {
			if (time_after(jiffies, timeout)) {
				osm_err("%s: IOP reset timeout.\n", c->name);
				rc = -ETIMEDOUT;
				goto exit;
			}
			set_current_state(TASK_UNINTERRUPTIBLE);
			schedule_timeout(1);

			m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_RESET);
		}
		i2o_msg_nop(c, m);

		/* from here all quiesce commands are safe */
		c->no_quiesce = 0;

		/* verify if controller is in state RESET */
		i2o_status_get(c);

		if (!c->promise && (sb->iop_state != ADAPTER_STATE_RESET))
			osm_warn("%s: reset completed, but adapter not in RESET"
				 " state.\n", c->name);
		else
			osm_debug("%s: reset completed.\n", c->name);

		break;

	default:
		osm_err("%s: IOP reset timeout.\n", c->name);
		rc = -ETIMEDOUT;
		break;
	}

      exit:
	/* Enable all IOPs */
	i2o_iop_enable_all();

	return rc;
};

/**
 *	i2o_iop_activate - Bring controller up to HOLD
 *	@c: controller
 *
 *	This function brings an I2O controller into HOLD state. The adapter
 *	is reset if necessary and then the queues and resource table are read.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int i2o_iop_activate(struct i2o_controller *c)
{
	i2o_status_block *sb = c->status_block.virt;
	int rc;
	int state;

	/* In INIT state, Wait Inbound Q to initialize (in i2o_status_get) */
	/* In READY state, Get status */

	rc = i2o_status_get(c);
	if (rc) {
		osm_info("%s: Unable to obtain status, attempting a reset.\n",
			 c->name);
		rc = i2o_iop_reset(c);
		if (rc)
			return rc;
	}

	if (sb->i2o_version > I2OVER15) {
		osm_err("%s: Not running version 1.5 of the I2O Specification."
			"\n", c->name);
		return -ENODEV;
	}

	switch (sb->iop_state) {
	case ADAPTER_STATE_FAULTED:
		osm_err("%s: hardware fault\n", c->name);
		return -EFAULT;

	case ADAPTER_STATE_READY:
	case ADAPTER_STATE_OPERATIONAL:
	case ADAPTER_STATE_HOLD:
	case ADAPTER_STATE_FAILED:
		osm_debug("%s: already running, trying to reset...\n", c->name);
		rc = i2o_iop_reset(c);
		if (rc)
			return rc;
	}

	/* preserve state */
	state = sb->iop_state;

	rc = i2o_iop_init_outbound_queue(c);
	if (rc)
		return rc;

	/* if adapter was not in RESET state clear now */
	if (state != ADAPTER_STATE_RESET)
		i2o_iop_clear(c);

	i2o_status_get(c);

	if (sb->iop_state != ADAPTER_STATE_HOLD) {
		osm_err("%s: failed to bring IOP into HOLD state\n", c->name);
		return -EIO;
	}

	return i2o_hrt_get(c);
};

/**
 *	i2o_iop_systab_set - Set the I2O System Table of the specified IOP
 *	@c: I2O controller to which the system table should be send
 *
 *	Before the systab could be set i2o_systab_build() must be called.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int i2o_iop_systab_set(struct i2o_controller *c)
{
	struct i2o_message __iomem *msg;
	u32 m;
	i2o_status_block *sb = c->status_block.virt;
	struct device *dev = &c->pdev->dev;
	struct resource *root;
	int rc;

	if (sb->current_mem_size < sb->desired_mem_size) {
		struct resource *res = &c->mem_resource;
		res->name = c->pdev->bus->name;
		res->flags = IORESOURCE_MEM;
		res->start = 0;
		res->end = 0;
		osm_info("%s: requires private memory resources.\n", c->name);
		root = pci_find_parent_resource(c->pdev, res);
		if (root == NULL)
			osm_warn("%s: Can't find parent resource!\n", c->name);
		if (root && allocate_resource(root, res, sb->desired_mem_size, sb->desired_mem_size, sb->desired_mem_size, 1 << 20,	/* Unspecified, so use 1Mb and play safe */
					      NULL, NULL) >= 0) {
			c->mem_alloc = 1;
			sb->current_mem_size = 1 + res->end - res->start;
			sb->current_mem_base = res->start;
			osm_info("%s: allocated %ld bytes of PCI memory at "
				 "0x%08lX.\n", c->name,
				 1 + res->end - res->start, res->start);
		}
	}

	if (sb->current_io_size < sb->desired_io_size) {
		struct resource *res = &c->io_resource;
		res->name = c->pdev->bus->name;
		res->flags = IORESOURCE_IO;
		res->start = 0;
		res->end = 0;
		osm_info("%s: requires private memory resources.\n", c->name);
		root = pci_find_parent_resource(c->pdev, res);
		if (root == NULL)
			osm_warn("%s: Can't find parent resource!\n", c->name);
		if (root && allocate_resource(root, res, sb->desired_io_size, sb->desired_io_size, sb->desired_io_size, 1 << 20,	/* Unspecified, so use 1Mb and play safe */
					      NULL, NULL) >= 0) {
			c->io_alloc = 1;
			sb->current_io_size = 1 + res->end - res->start;
			sb->current_mem_base = res->start;
			osm_info("%s: allocated %ld bytes of PCI I/O at 0x%08lX"
				 ".\n", c->name, 1 + res->end - res->start,
				 res->start);
		}
	}

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -ETIMEDOUT;

	i2o_systab.phys = dma_map_single(dev, i2o_systab.virt, i2o_systab.len,
					 PCI_DMA_TODEVICE);
	if (!i2o_systab.phys) {
		i2o_msg_nop(c, m);
		return -ENOMEM;
	}

	writel(I2O_MESSAGE_SIZE(12) | SGL_OFFSET_6, &msg->u.head[0]);
	writel(I2O_CMD_SYS_TAB_SET << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);

	/*
	 * Provide three SGL-elements:
	 * System table (SysTab), Private memory space declaration and
	 * Private i/o space declaration
	 *
	 * FIXME: is this still true?
	 * Nasty one here. We can't use dma_alloc_coherent to send the
	 * same table to everyone. We have to go remap it for them all
	 */

	writel(c->unit + 2, &msg->body[0]);
	writel(0, &msg->body[1]);
	writel(0x54000000 | i2o_systab.len, &msg->body[2]);
	writel(i2o_systab.phys, &msg->body[3]);
	writel(0x54000000 | sb->current_mem_size, &msg->body[4]);
	writel(sb->current_mem_base, &msg->body[5]);
	writel(0xd4000000 | sb->current_io_size, &msg->body[6]);
	writel(sb->current_io_base, &msg->body[6]);

	rc = i2o_msg_post_wait(c, m, 120);

	dma_unmap_single(dev, i2o_systab.phys, i2o_systab.len,
			 PCI_DMA_TODEVICE);

	if (rc < 0)
		osm_err("%s: Unable to set SysTab (status=%#x).\n", c->name,
			-rc);
	else
		osm_debug("%s: SysTab set.\n", c->name);

	i2o_status_get(c);	// Entered READY state

	return rc;
}

/**
 *	i2o_iop_online - Bring a controller online into OPERATIONAL state.
 *	@c: I2O controller
 *
 *	Send the system table and enable the I2O controller.
 *
 *	Returns 0 on success or negativer error code on failure.
 */
static int i2o_iop_online(struct i2o_controller *c)
{
	int rc;

	rc = i2o_iop_systab_set(c);
	if (rc)
		return rc;

	/* In READY state */
	osm_debug("%s: Attempting to enable...\n", c->name);
	rc = i2o_iop_enable(c);
	if (rc)
		return rc;

	return 0;
};

/**
 *	i2o_iop_remove - Remove the I2O controller from the I2O core
 *	@c: I2O controller
 *
 *	Remove the I2O controller from the I2O core. If devices are attached to
 *	the controller remove these also and finally reset the controller.
 */
void i2o_iop_remove(struct i2o_controller *c)
{
	struct i2o_device *dev, *tmp;

	osm_debug("%s: deleting controller\n", c->name);

	i2o_driver_notify_controller_remove_all(c);

	list_del(&c->list);

	list_for_each_entry_safe(dev, tmp, &c->devices, list)
	    i2o_device_remove(dev);

	class_device_unregister(c->classdev);
	device_del(&c->device);

	/* Ask the IOP to switch to RESET state */
	i2o_iop_reset(c);

	put_device(&c->device);
}

/**
 *	i2o_systab_build - Build system table
 *
 *	The system table contains information about all the IOPs in the system
 *	(duh) and is used by the Executives on the IOPs to establish peer2peer
 *	connections. We're not supporting peer2peer at the moment, but this
 *	will be needed down the road for things like lan2lan forwarding.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int i2o_systab_build(void)
{
	struct i2o_controller *c, *tmp;
	int num_controllers = 0;
	u32 change_ind = 0;
	int count = 0;
	struct i2o_sys_tbl *systab = i2o_systab.virt;

	list_for_each_entry_safe(c, tmp, &i2o_controllers, list)
	    num_controllers++;

	if (systab) {
		change_ind = systab->change_ind;
		kfree(i2o_systab.virt);
	}

	/* Header + IOPs */
	i2o_systab.len = sizeof(struct i2o_sys_tbl) + num_controllers *
	    sizeof(struct i2o_sys_tbl_entry);

	systab = i2o_systab.virt = kmalloc(i2o_systab.len, GFP_KERNEL);
	if (!systab) {
		osm_err("unable to allocate memory for System Table\n");
		return -ENOMEM;
	}
	memset(systab, 0, i2o_systab.len);

	systab->version = I2OVERSION;
	systab->change_ind = change_ind + 1;

	list_for_each_entry_safe(c, tmp, &i2o_controllers, list) {
		i2o_status_block *sb;

		if (count >= num_controllers) {
			osm_err("controller added while building system table"
				"\n");
			break;
		}

		sb = c->status_block.virt;

		/*
		 * Get updated IOP state so we have the latest information
		 *
		 * We should delete the controller at this point if it
		 * doesn't respond since if it's not on the system table
		 * it is techninically not part of the I2O subsystem...
		 */
		if (unlikely(i2o_status_get(c))) {
			osm_err("%s: Deleting b/c could not get status while "
				"attempting to build system table\n", c->name);
			i2o_iop_remove(c);
			continue;	// try the next one
		}

		systab->iops[count].org_id = sb->org_id;
		systab->iops[count].iop_id = c->unit + 2;
		systab->iops[count].seg_num = 0;
		systab->iops[count].i2o_version = sb->i2o_version;
		systab->iops[count].iop_state = sb->iop_state;
		systab->iops[count].msg_type = sb->msg_type;
		systab->iops[count].frame_size = sb->inbound_frame_size;
		systab->iops[count].last_changed = change_ind;
		systab->iops[count].iop_capabilities = sb->iop_capabilities;
		systab->iops[count].inbound_low =
		    i2o_dma_low(c->base.phys + I2O_IN_PORT);
		systab->iops[count].inbound_high =
		    i2o_dma_high(c->base.phys + I2O_IN_PORT);

		count++;
	}

	systab->num_entries = count;

	return 0;
};

/**
 *	i2o_parse_hrt - Parse the hardware resource table.
 *	@c: I2O controller
 *
 *	We don't do anything with it except dumping it (in debug mode).
 *
 *	Returns 0.
 */
static int i2o_parse_hrt(struct i2o_controller *c)
{
	i2o_dump_hrt(c);
	return 0;
};

/**
 *	i2o_status_get - Get the status block from the I2O controller
 *	@c: I2O controller
 *
 *	Issue a status query on the controller. This updates the attached
 *	status block. The status block could then be accessed through
 *	c->status_block.
 *
 *	Returns 0 on sucess or negative error code on failure.
 */
int i2o_status_get(struct i2o_controller *c)
{
	struct i2o_message __iomem *msg;
	u32 m;
	volatile u8 *status_block;
	unsigned long timeout;

	status_block = (u8 *) c->status_block.virt;
	memset(c->status_block.virt, 0, sizeof(i2o_status_block));

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -ETIMEDOUT;

	writel(NINE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
	writel(I2O_CMD_STATUS_GET << 24 | HOST_TID << 12 | ADAPTER_TID,
	       &msg->u.head[1]);
	writel(i2o_exec_driver.context, &msg->u.s.icntxt);
	writel(0, &msg->u.s.tcntxt);	// FIXME: use resonable transaction context
	writel(0, &msg->body[0]);
	writel(0, &msg->body[1]);
	writel(i2o_dma_low(c->status_block.phys), &msg->body[2]);
	writel(i2o_dma_high(c->status_block.phys), &msg->body[3]);
	writel(sizeof(i2o_status_block), &msg->body[4]);	/* always 88 bytes */

	i2o_msg_post(c, m);

	/* Wait for a reply */
	timeout = jiffies + I2O_TIMEOUT_STATUS_GET * HZ;
	while (status_block[87] != 0xFF) {
		if (time_after(jiffies, timeout)) {
			osm_err("%s: Get status timeout.\n", c->name);
			return -ETIMEDOUT;
		}

		set_current_state(TASK_UNINTERRUPTIBLE);
		schedule_timeout(1);
	}

#ifdef DEBUG
	i2o_debug_state(c);
#endif

	return 0;
}

/*
 *	i2o_hrt_get - Get the Hardware Resource Table from the I2O controller
 *	@c: I2O controller from which the HRT should be fetched
 *
 *	The HRT contains information about possible hidden devices but is
 *	mostly useless to us.
 *
 *	Returns 0 on success or negativer error code on failure.
 */
static int i2o_hrt_get(struct i2o_controller *c)
{
	int rc;
	int i;
	i2o_hrt *hrt = c->hrt.virt;
	u32 size = sizeof(i2o_hrt);
	struct device *dev = &c->pdev->dev;

	for (i = 0; i < I2O_HRT_GET_TRIES; i++) {
		struct i2o_message __iomem *msg;
		u32 m;

		m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
		if (m == I2O_QUEUE_EMPTY)
			return -ETIMEDOUT;

		writel(SIX_WORD_MSG_SIZE | SGL_OFFSET_4, &msg->u.head[0]);
		writel(I2O_CMD_HRT_GET << 24 | HOST_TID << 12 | ADAPTER_TID,
		       &msg->u.head[1]);
		writel(0xd0000000 | c->hrt.len, &msg->body[0]);
		writel(c->hrt.phys, &msg->body[1]);

		rc = i2o_msg_post_wait_mem(c, m, 20, &c->hrt);

		if (rc < 0) {
			osm_err("%s: Unable to get HRT (status=%#x)\n", c->name,
				-rc);
			return rc;
		}

		size = hrt->num_entries * hrt->entry_len << 2;
		if (size > c->hrt.len) {
			if (i2o_dma_realloc(dev, &c->hrt, size, GFP_KERNEL))
				return -ENOMEM;
			else
				hrt = c->hrt.virt;
		} else
			return i2o_parse_hrt(c);
	}

	osm_err("%s: Unable to get HRT after %d tries, giving up\n", c->name,
		I2O_HRT_GET_TRIES);

	return -EBUSY;
}

/**
 *	i2o_iop_free - Free the i2o_controller struct
 *	@c: I2O controller to free
 */
void i2o_iop_free(struct i2o_controller *c)
{
	kfree(c);
};

/**
 *	i2o_iop_release - release the memory for a I2O controller
 *	@dev: I2O controller which should be released
 *
 *	Release the allocated memory. This function is called if refcount of
 *	device reaches 0 automatically.
 */
static void i2o_iop_release(struct device *dev)
{
	struct i2o_controller *c = to_i2o_controller(dev);

	i2o_iop_free(c);
};

/* I2O controller class */
static struct class *i2o_controller_class;

/**
 *	i2o_iop_alloc - Allocate and initialize a i2o_controller struct
 *
 *	Allocate the necessary memory for a i2o_controller struct and
 *	initialize the lists.
 *
 *	Returns a pointer to the I2O controller or a negative error code on
 *	failure.
 */
struct i2o_controller *i2o_iop_alloc(void)
{
	static int unit = 0;	/* 0 and 1 are NULL IOP and Local Host */
	struct i2o_controller *c;

	c = kmalloc(sizeof(*c), GFP_KERNEL);
	if (!c) {
		osm_err("i2o: Insufficient memory to allocate a I2O controller."
			"\n");
		return ERR_PTR(-ENOMEM);
	}
	memset(c, 0, sizeof(*c));

	INIT_LIST_HEAD(&c->devices);
	spin_lock_init(&c->lock);
	init_MUTEX(&c->lct_lock);
	c->unit = unit++;
	sprintf(c->name, "iop%d", c->unit);

	device_initialize(&c->device);

	c->device.release = &i2o_iop_release;

	snprintf(c->device.bus_id, BUS_ID_SIZE, "iop%d", c->unit);

#if BITS_PER_LONG == 64
	spin_lock_init(&c->context_list_lock);
	atomic_set(&c->context_list_counter, 0);
	INIT_LIST_HEAD(&c->context_list);
#endif

	return c;
};

/**
 *	i2o_iop_add - Initialize the I2O controller and add him to the I2O core
 *	@c: controller
 *
 *	Initialize the I2O controller and if no error occurs add him to the I2O
 *	core.
 *
 *	Returns 0 on success or negative error code on failure.
 */
int i2o_iop_add(struct i2o_controller *c)
{
	int rc;

	if ((rc = device_add(&c->device))) {
		osm_err("%s: could not add controller\n", c->name);
		goto iop_reset;
	}

	c->classdev = class_device_create(i2o_controller_class, NULL, MKDEV(0,0),
			&c->device, "iop%d", c->unit);
	if (IS_ERR(c->classdev)) {
		osm_err("%s: could not add controller class\n", c->name);
		goto device_del;
	}

	osm_info("%s: Activating I2O controller...\n", c->name);
	osm_info("%s: This may take a few minutes if there are many devices\n",
		 c->name);

	if ((rc = i2o_iop_activate(c))) {
		osm_err("%s: could not activate controller\n", c->name);
		goto class_del;
	}

	osm_debug("%s: building sys table...\n", c->name);

	if ((rc = i2o_systab_build()))
		goto class_del;

	osm_debug("%s: online controller...\n", c->name);

	if ((rc = i2o_iop_online(c)))
		goto class_del;

	osm_debug("%s: getting LCT...\n", c->name);

	if ((rc = i2o_exec_lct_get(c)))
		goto class_del;

	list_add(&c->list, &i2o_controllers);

	i2o_driver_notify_controller_add_all(c);

	osm_info("%s: Controller added\n", c->name);

	return 0;

      class_del:
	class_device_unregister(c->classdev);

      device_del:
	device_del(&c->device);

      iop_reset:
	i2o_iop_reset(c);

	return rc;
};

/**
 *	i2o_event_register - Turn on/off event notification for a I2O device
 *	@dev: I2O device which should receive the event registration request
 *	@drv: driver which want to get notified
 *	@tcntxt: transaction context to use with this notifier
 *	@evt_mask: mask of events
 *
 *	Create and posts an event registration message to the task. No reply
 *	is waited for, or expected. If you do not want further notifications,
 *	call the i2o_event_register again with a evt_mask of 0.
 *
 *	Returns 0 on success or -ETIMEDOUT if no message could be fetched for
 *	sending the request.
 */
int i2o_event_register(struct i2o_device *dev, struct i2o_driver *drv,
		       int tcntxt, u32 evt_mask)
{
	struct i2o_controller *c = dev->iop;
	struct i2o_message __iomem *msg;
	u32 m;

	m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
	if (m == I2O_QUEUE_EMPTY)
		return -ETIMEDOUT;

	writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
	writel(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 | dev->lct_data.
	       tid, &msg->u.head[1]);
	writel(drv->context, &msg->u.s.icntxt);
	writel(tcntxt, &msg->u.s.tcntxt);
	writel(evt_mask, &msg->body[0]);

	i2o_msg_post(c, m);

	return 0;
};

/**
 *	i2o_iop_init - I2O main initialization function
 *
 *	Initialize the I2O drivers (OSM) functions, register the Executive OSM,
 *	initialize the I2O PCI part and finally initialize I2O device stuff.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int __init i2o_iop_init(void)
{
	int rc = 0;

	printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");

	i2o_controller_class = class_create(THIS_MODULE, "i2o_controller");
	if (IS_ERR(i2o_controller_class)) {
		osm_err("can't register class i2o_controller\n");
		goto exit;
	}

	if ((rc = i2o_driver_init()))
		goto class_exit;

	if ((rc = i2o_exec_init()))
		goto driver_exit;

	if ((rc = i2o_pci_init()))
		goto exec_exit;

	return 0;

      exec_exit:
	i2o_exec_exit();

      driver_exit:
	i2o_driver_exit();

      class_exit:
	class_destroy(i2o_controller_class);

      exit:
	return rc;
}

/**
 *	i2o_iop_exit - I2O main exit function
 *
 *	Removes I2O controllers from PCI subsystem and shut down OSMs.
 */
static void __exit i2o_iop_exit(void)
{
	i2o_pci_exit();
	i2o_exec_exit();
	i2o_driver_exit();
	class_destroy(i2o_controller_class);
};

module_init(i2o_iop_init);
module_exit(i2o_iop_exit);

MODULE_AUTHOR("Red Hat Software");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(OSM_DESCRIPTION);
MODULE_VERSION(OSM_VERSION);

#if BITS_PER_LONG == 64
EXPORT_SYMBOL(i2o_cntxt_list_add);
EXPORT_SYMBOL(i2o_cntxt_list_get);
EXPORT_SYMBOL(i2o_cntxt_list_remove);
EXPORT_SYMBOL(i2o_cntxt_list_get_ptr);
#endif
EXPORT_SYMBOL(i2o_msg_get_wait);
EXPORT_SYMBOL(i2o_msg_nop);
EXPORT_SYMBOL(i2o_find_iop);
EXPORT_SYMBOL(i2o_iop_find_device);
EXPORT_SYMBOL(i2o_event_register);
EXPORT_SYMBOL(i2o_status_get);
EXPORT_SYMBOL(i2o_controllers);