aboutsummaryrefslogtreecommitdiff
path: root/drivers/s390/crypto/zcrypt_pcixcc.c
blob: 3674bfa82b65ce337d6ad79b50e7392f344d5b93 (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
/*
 *  linux/drivers/s390/crypto/zcrypt_pcixcc.c
 *
 *  zcrypt 2.1.0
 *
 *  Copyright (C)  2001, 2006 IBM Corporation
 *  Author(s): Robert Burroughs
 *	       Eric Rossman (edrossma@us.ibm.com)
 *
 *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
 *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
 *				  Ralph Wuerthner <rwuerthn@de.ibm.com>
 *
 * 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, 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. 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.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <asm/atomic.h>
#include <asm/uaccess.h>

#include "ap_bus.h"
#include "zcrypt_api.h"
#include "zcrypt_error.h"
#include "zcrypt_pcicc.h"
#include "zcrypt_pcixcc.h"
#include "zcrypt_cca_key.h"

#define PCIXCC_MIN_MOD_SIZE	 16	/*  128 bits	*/
#define PCIXCC_MIN_MOD_SIZE_OLD	 64	/*  512 bits	*/
#define PCIXCC_MAX_MOD_SIZE	256	/* 2048 bits	*/

#define PCIXCC_MCL2_SPEED_RATING	7870	/* FIXME: needs finetuning */
#define PCIXCC_MCL3_SPEED_RATING	7870
#define CEX2C_SPEED_RATING		8540

#define PCIXCC_MAX_ICA_MESSAGE_SIZE 0x77c  /* max size type6 v2 crt message */
#define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply	    */

#define PCIXCC_MAX_XCRB_MESSAGE_SIZE (12*1024)
#define PCIXCC_MAX_XCRB_RESPONSE_SIZE PCIXCC_MAX_XCRB_MESSAGE_SIZE
#define PCIXCC_MAX_XCRB_DATA_SIZE (11*1024)
#define PCIXCC_MAX_XCRB_REPLY_SIZE (5*1024)

#define PCIXCC_MAX_RESPONSE_SIZE PCIXCC_MAX_XCRB_RESPONSE_SIZE

#define PCIXCC_CLEANUP_TIME	(15*HZ)

#define CEIL4(x) ((((x)+3)/4)*4)

struct response_type {
	struct completion work;
	int type;
};
#define PCIXCC_RESPONSE_TYPE_ICA  0
#define PCIXCC_RESPONSE_TYPE_XCRB 1

static struct ap_device_id zcrypt_pcixcc_ids[] = {
	{ AP_DEVICE(AP_DEVICE_TYPE_PCIXCC) },
	{ AP_DEVICE(AP_DEVICE_TYPE_CEX2C) },
	{ /* end of list */ },
};

#ifndef CONFIG_ZCRYPT_MONOLITHIC
MODULE_DEVICE_TABLE(ap, zcrypt_pcixcc_ids);
MODULE_AUTHOR("IBM Corporation");
MODULE_DESCRIPTION("PCIXCC Cryptographic Coprocessor device driver, "
		   "Copyright 2001, 2006 IBM Corporation");
MODULE_LICENSE("GPL");
#endif

static int zcrypt_pcixcc_probe(struct ap_device *ap_dev);
static void zcrypt_pcixcc_remove(struct ap_device *ap_dev);
static void zcrypt_pcixcc_receive(struct ap_device *, struct ap_message *,
				 struct ap_message *);

static struct ap_driver zcrypt_pcixcc_driver = {
	.probe = zcrypt_pcixcc_probe,
	.remove = zcrypt_pcixcc_remove,
	.receive = zcrypt_pcixcc_receive,
	.ids = zcrypt_pcixcc_ids,
	.request_timeout = PCIXCC_CLEANUP_TIME,
};

/**
 * The following is used to initialize the CPRBX passed to the PCIXCC/CEX2C
 * card in a type6 message. The 3 fields that must be filled in at execution
 * time are  req_parml, rpl_parml and usage_domain.
 * Everything about this interface is ascii/big-endian, since the
 * device does *not* have 'Intel inside'.
 *
 * The CPRBX is followed immediately by the parm block.
 * The parm block contains:
 * - function code ('PD' 0x5044 or 'PK' 0x504B)
 * - rule block (one of:)
 *   + 0x000A 'PKCS-1.2' (MCL2 'PD')
 *   + 0x000A 'ZERO-PAD' (MCL2 'PK')
 *   + 0x000A 'ZERO-PAD' (MCL3 'PD' or CEX2C 'PD')
 *   + 0x000A 'MRP     ' (MCL3 'PK' or CEX2C 'PK')
 * - VUD block
 */
static struct CPRBX static_cprbx = {
	.cprb_len	=  0x00DC,
	.cprb_ver_id	=  0x02,
	.func_id	= {0x54,0x32},
};

/**
 * Convert a ICAMEX message to a type6 MEX message.
 *
 * @zdev: crypto device pointer
 * @ap_msg: pointer to AP message
 * @mex: pointer to user input data
 *
 * Returns 0 on success or -EFAULT.
 */
static int ICAMEX_msg_to_type6MEX_msgX(struct zcrypt_device *zdev,
				       struct ap_message *ap_msg,
				       struct ica_rsa_modexpo *mex)
{
	static struct type6_hdr static_type6_hdrX = {
		.type		=  0x06,
		.offset1	=  0x00000058,
		.agent_id	= {'C','A',},
		.function_code	= {'P','K'},
	};
	static struct function_and_rules_block static_pke_fnr = {
		.function_code	= {'P','K'},
		.ulen		= 10,
		.only_rule	= {'M','R','P',' ',' ',' ',' ',' '}
	};
	static struct function_and_rules_block static_pke_fnr_MCL2 = {
		.function_code	= {'P','K'},
		.ulen		= 10,
		.only_rule	= {'Z','E','R','O','-','P','A','D'}
	};
	struct {
		struct type6_hdr hdr;
		struct CPRBX cprbx;
		struct function_and_rules_block fr;
		unsigned short length;
		char text[0];
	} __attribute__((packed)) *msg = ap_msg->message;
	int size;

	/* VUD.ciphertext */
	msg->length = mex->inputdatalength + 2;
	if (copy_from_user(msg->text, mex->inputdata, mex->inputdatalength))
		return -EFAULT;

	/* Set up key which is located after the variable length text. */
	size = zcrypt_type6_mex_key_en(mex, msg->text+mex->inputdatalength, 1);
	if (size < 0)
		return size;
	size += sizeof(*msg) + mex->inputdatalength;

	/* message header, cprbx and f&r */
	msg->hdr = static_type6_hdrX;
	msg->hdr.ToCardLen1 = size - sizeof(msg->hdr);
	msg->hdr.FromCardLen1 = PCIXCC_MAX_ICA_RESPONSE_SIZE - sizeof(msg->hdr);

	msg->cprbx = static_cprbx;
	msg->cprbx.domain = AP_QID_QUEUE(zdev->ap_dev->qid);
	msg->cprbx.rpl_msgbl = msg->hdr.FromCardLen1;

	msg->fr = (zdev->user_space_type == ZCRYPT_PCIXCC_MCL2) ?
		static_pke_fnr_MCL2 : static_pke_fnr;

	msg->cprbx.req_parml = size - sizeof(msg->hdr) - sizeof(msg->cprbx);

	ap_msg->length = size;
	return 0;
}

/**
 * Convert a ICACRT message to a type6 CRT message.
 *
 * @zdev: crypto device pointer
 * @ap_msg: pointer to AP message
 * @crt: pointer to user input data
 *
 * Returns 0 on success or -EFAULT.
 */
static int ICACRT_msg_to_type6CRT_msgX(struct zcrypt_device *zdev,
				       struct ap_message *ap_msg,
				       struct ica_rsa_modexpo_crt *crt)
{
	static struct type6_hdr static_type6_hdrX = {
		.type		=  0x06,
		.offset1	=  0x00000058,
		.agent_id	= {'C','A',},
		.function_code	= {'P','D'},
	};
	static struct function_and_rules_block static_pkd_fnr = {
		.function_code	= {'P','D'},
		.ulen		= 10,
		.only_rule	= {'Z','E','R','O','-','P','A','D'}
	};

	static struct function_and_rules_block static_pkd_fnr_MCL2 = {
		.function_code	= {'P','D'},
		.ulen		= 10,
		.only_rule	= {'P','K','C','S','-','1','.','2'}
	};
	struct {
		struct type6_hdr hdr;
		struct CPRBX cprbx;
		struct function_and_rules_block fr;
		unsigned short length;
		char text[0];
	} __attribute__((packed)) *msg = ap_msg->message;
	int size;

	/* VUD.ciphertext */
	msg->length = crt->inputdatalength + 2;
	if (copy_from_user(msg->text, crt->inputdata, crt->inputdatalength))
		return -EFAULT;

	/* Set up key which is located after the variable length text. */
	size = zcrypt_type6_crt_key(crt, msg->text + crt->inputdatalength, 1);
	if (size < 0)
		return size;
	size += sizeof(*msg) + crt->inputdatalength;	/* total size of msg */

	/* message header, cprbx and f&r */
	msg->hdr = static_type6_hdrX;
	msg->hdr.ToCardLen1 = size -  sizeof(msg->hdr);
	msg->hdr.FromCardLen1 = PCIXCC_MAX_ICA_RESPONSE_SIZE - sizeof(msg->hdr);

	msg->cprbx = static_cprbx;
	msg->cprbx.domain = AP_QID_QUEUE(zdev->ap_dev->qid);
	msg->cprbx.req_parml = msg->cprbx.rpl_msgbl =
		size - sizeof(msg->hdr) - sizeof(msg->cprbx);

	msg->fr = (zdev->user_space_type == ZCRYPT_PCIXCC_MCL2) ?
		static_pkd_fnr_MCL2 : static_pkd_fnr;

	ap_msg->length = size;
	return 0;
}

/**
 * Convert a XCRB message to a type6 CPRB message.
 *
 * @zdev: crypto device pointer
 * @ap_msg: pointer to AP message
 * @xcRB: pointer to user input data
 *
 * Returns 0 on success or -EFAULT.
 */
struct type86_fmt2_msg {
	struct type86_hdr hdr;
	struct type86_fmt2_ext fmt2;
} __attribute__((packed));

static int XCRB_msg_to_type6CPRB_msgX(struct zcrypt_device *zdev,
				       struct ap_message *ap_msg,
				       struct ica_xcRB *xcRB)
{
	static struct type6_hdr static_type6_hdrX = {
		.type		=  0x06,
		.offset1	=  0x00000058,
	};
	struct {
		struct type6_hdr hdr;
		struct CPRBX cprbx;
	} __attribute__((packed)) *msg = ap_msg->message;

	int rcblen = CEIL4(xcRB->request_control_blk_length);
	int replylen;
	char *req_data = ap_msg->message + sizeof(struct type6_hdr) + rcblen;
	char *function_code;

	/* length checks */
	ap_msg->length = sizeof(struct type6_hdr) +
		CEIL4(xcRB->request_control_blk_length) +
		xcRB->request_data_length;
	if (ap_msg->length > PCIXCC_MAX_XCRB_MESSAGE_SIZE) {
		PRINTK("Combined message is too large (%ld/%d/%d).\n",
		    sizeof(struct type6_hdr),
		    xcRB->request_control_blk_length,
		    xcRB->request_data_length);
		return -EFAULT;
	}
	if (CEIL4(xcRB->reply_control_blk_length) >
	    PCIXCC_MAX_XCRB_REPLY_SIZE) {
		PDEBUG("Reply CPRB length is too large (%d).\n",
		    xcRB->request_control_blk_length);
		return -EFAULT;
	}
	if (CEIL4(xcRB->reply_data_length) > PCIXCC_MAX_XCRB_DATA_SIZE) {
		PDEBUG("Reply data block length is too large (%d).\n",
		    xcRB->reply_data_length);
		return -EFAULT;
	}
	replylen = CEIL4(xcRB->reply_control_blk_length) +
		CEIL4(xcRB->reply_data_length) +
		sizeof(struct type86_fmt2_msg);
	if (replylen > PCIXCC_MAX_XCRB_RESPONSE_SIZE) {
		PDEBUG("Reply CPRB + data block > PCIXCC_MAX_XCRB_RESPONSE_SIZE"
		       " (%d/%d/%d).\n",
		       sizeof(struct type86_fmt2_msg),
		       xcRB->reply_control_blk_length,
		       xcRB->reply_data_length);
		xcRB->reply_control_blk_length = PCIXCC_MAX_XCRB_RESPONSE_SIZE -
			(sizeof(struct type86_fmt2_msg) +
			    CEIL4(xcRB->reply_data_length));
		PDEBUG("Capping Reply CPRB length at %d\n",
		       xcRB->reply_control_blk_length);
	}

	/* prepare type6 header */
	msg->hdr = static_type6_hdrX;
	memcpy(msg->hdr.agent_id , &(xcRB->agent_ID), sizeof(xcRB->agent_ID));
	msg->hdr.ToCardLen1 = xcRB->request_control_blk_length;
	if (xcRB->request_data_length) {
		msg->hdr.offset2 = msg->hdr.offset1 + rcblen;
		msg->hdr.ToCardLen2 = xcRB->request_data_length;
	}
	msg->hdr.FromCardLen1 = xcRB->reply_control_blk_length;
	msg->hdr.FromCardLen2 = xcRB->reply_data_length;

	/* prepare CPRB */
	if (copy_from_user(&(msg->cprbx), xcRB->request_control_blk_addr,
		    xcRB->request_control_blk_length))
		return -EFAULT;
	if (msg->cprbx.cprb_len + sizeof(msg->hdr.function_code) >
	    xcRB->request_control_blk_length) {
		PDEBUG("cprb_len too large (%d/%d)\n", msg->cprbx.cprb_len,
		    xcRB->request_control_blk_length);
		return -EFAULT;
	}
	function_code = ((unsigned char *)&msg->cprbx) + msg->cprbx.cprb_len;
	memcpy(msg->hdr.function_code, function_code, sizeof(msg->hdr.function_code));

	/* copy data block */
	if (xcRB->request_data_length &&
	    copy_from_user(req_data, xcRB->request_data_address,
		xcRB->request_data_length))
		return -EFAULT;
	return 0;
}

/**
 * Prepare a type6 CPRB message for random number generation
 *
 * @ap_dev: AP device pointer
 * @ap_msg: pointer to AP message
 */
static void rng_type6CPRB_msgX(struct ap_device *ap_dev,
			       struct ap_message *ap_msg,
			       unsigned random_number_length)
{
	struct {
		struct type6_hdr hdr;
		struct CPRBX cprbx;
		char function_code[2];
		short int rule_length;
		char rule[8];
		short int verb_length;
		short int key_length;
	} __attribute__((packed)) *msg = ap_msg->message;
	static struct type6_hdr static_type6_hdrX = {
		.type		= 0x06,
		.offset1	= 0x00000058,
		.agent_id	= {'C', 'A'},
		.function_code	= {'R', 'L'},
		.ToCardLen1	= sizeof *msg - sizeof(msg->hdr),
		.FromCardLen1	= sizeof *msg - sizeof(msg->hdr),
	};
	static struct CPRBX static_cprbx = {
		.cprb_len	= 0x00dc,
		.cprb_ver_id	= 0x02,
		.func_id	= {0x54, 0x32},
		.req_parml	= sizeof *msg - sizeof(msg->hdr) -
				  sizeof(msg->cprbx),
		.rpl_msgbl	= sizeof *msg - sizeof(msg->hdr),
	};

	msg->hdr = static_type6_hdrX;
	msg->hdr.FromCardLen2 = random_number_length,
	msg->cprbx = static_cprbx;
	msg->cprbx.rpl_datal = random_number_length,
	msg->cprbx.domain = AP_QID_QUEUE(ap_dev->qid);
	memcpy(msg->function_code, msg->hdr.function_code, 0x02);
	msg->rule_length = 0x0a;
	memcpy(msg->rule, "RANDOM  ", 8);
	msg->verb_length = 0x02;
	msg->key_length = 0x02;
	ap_msg->length = sizeof *msg;
}

/**
 * Copy results from a type 86 ICA reply message back to user space.
 *
 * @zdev: crypto device pointer
 * @reply: reply AP message.
 * @data: pointer to user output data
 * @length: size of user output data
 *
 * Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
 */
struct type86x_reply {
	struct type86_hdr hdr;
	struct type86_fmt2_ext fmt2;
	struct CPRBX cprbx;
	unsigned char pad[4];	/* 4 byte function code/rules block ? */
	unsigned short length;
	char text[0];
} __attribute__((packed));

static int convert_type86_ica(struct zcrypt_device *zdev,
			  struct ap_message *reply,
			  char __user *outputdata,
			  unsigned int outputdatalength)
{
	static unsigned char static_pad[] = {
		0x00,0x02,
		0x1B,0x7B,0x5D,0xB5,0x75,0x01,0x3D,0xFD,
		0x8D,0xD1,0xC7,0x03,0x2D,0x09,0x23,0x57,
		0x89,0x49,0xB9,0x3F,0xBB,0x99,0x41,0x5B,
		0x75,0x21,0x7B,0x9D,0x3B,0x6B,0x51,0x39,
		0xBB,0x0D,0x35,0xB9,0x89,0x0F,0x93,0xA5,
		0x0B,0x47,0xF1,0xD3,0xBB,0xCB,0xF1,0x9D,
		0x23,0x73,0x71,0xFF,0xF3,0xF5,0x45,0xFB,
		0x61,0x29,0x23,0xFD,0xF1,0x29,0x3F,0x7F,
		0x17,0xB7,0x1B,0xA9,0x19,0xBD,0x57,0xA9,
		0xD7,0x95,0xA3,0xCB,0xED,0x1D,0xDB,0x45,
		0x7D,0x11,0xD1,0x51,0x1B,0xED,0x71,0xE9,
		0xB1,0xD1,0xAB,0xAB,0x21,0x2B,0x1B,0x9F,
		0x3B,0x9F,0xF7,0xF7,0xBD,0x63,0xEB,0xAD,
		0xDF,0xB3,0x6F,0x5B,0xDB,0x8D,0xA9,0x5D,
		0xE3,0x7D,0x77,0x49,0x47,0xF5,0xA7,0xFD,
		0xAB,0x2F,0x27,0x35,0x77,0xD3,0x49,0xC9,
		0x09,0xEB,0xB1,0xF9,0xBF,0x4B,0xCB,0x2B,
		0xEB,0xEB,0x05,0xFF,0x7D,0xC7,0x91,0x8B,
		0x09,0x83,0xB9,0xB9,0x69,0x33,0x39,0x6B,
		0x79,0x75,0x19,0xBF,0xBB,0x07,0x1D,0xBD,
		0x29,0xBF,0x39,0x95,0x93,0x1D,0x35,0xC7,
		0xC9,0x4D,0xE5,0x97,0x0B,0x43,0x9B,0xF1,
		0x16,0x93,0x03,0x1F,0xA5,0xFB,0xDB,0xF3,
		0x27,0x4F,0x27,0x61,0x05,0x1F,0xB9,0x23,
		0x2F,0xC3,0x81,0xA9,0x23,0x71,0x55,0x55,
		0xEB,0xED,0x41,0xE5,0xF3,0x11,0xF1,0x43,
		0x69,0x03,0xBD,0x0B,0x37,0x0F,0x51,0x8F,
		0x0B,0xB5,0x89,0x5B,0x67,0xA9,0xD9,0x4F,
		0x01,0xF9,0x21,0x77,0x37,0x73,0x79,0xC5,
		0x7F,0x51,0xC1,0xCF,0x97,0xA1,0x75,0xAD,
		0x35,0x9D,0xD3,0xD3,0xA7,0x9D,0x5D,0x41,
		0x6F,0x65,0x1B,0xCF,0xA9,0x87,0x91,0x09
	};
	struct type86x_reply *msg = reply->message;
	unsigned short service_rc, service_rs;
	unsigned int reply_len, pad_len;
	char *data;

	service_rc = msg->cprbx.ccp_rtcode;
	if (unlikely(service_rc != 0)) {
		service_rs = msg->cprbx.ccp_rscode;
		if (service_rc == 8 && service_rs == 66) {
			PDEBUG("Bad block format on PCIXCC/CEX2C\n");
			return -EINVAL;
		}
		if (service_rc == 8 && service_rs == 65) {
			PDEBUG("Probably an even modulus on PCIXCC/CEX2C\n");
			return -EINVAL;
		}
		if (service_rc == 8 && service_rs == 770) {
			PDEBUG("Invalid key length on PCIXCC/CEX2C\n");
			return -EINVAL;
		}
		if (service_rc == 8 && service_rs == 783) {
			PDEBUG("Extended bitlengths not enabled on PCIXCC/CEX2C\n");
			zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
			return -EAGAIN;
		}
		if (service_rc == 12 && service_rs == 769) {
			PDEBUG("Invalid key on PCIXCC/CEX2C\n");
			return -EINVAL;
		}
		PRINTK("Unknown service rc/rs (PCIXCC/CEX2C): %d/%d\n",
		       service_rc, service_rs);
		zdev->online = 0;
		return -EAGAIN;	/* repeat the request on a different device. */
	}
	data = msg->text;
	reply_len = msg->length - 2;
	if (reply_len > outputdatalength)
		return -EINVAL;
	/**
	 * For all encipher requests, the length of the ciphertext (reply_len)
	 * will always equal the modulus length. For MEX decipher requests
	 * the output needs to get padded. Minimum pad size is 10.
	 *
	 * Currently, the cases where padding will be added is for:
	 * - PCIXCC_MCL2 using a CRT form token (since PKD didn't support
	 *   ZERO-PAD and CRT is only supported for PKD requests)
	 * - PCICC, always
	 */
	pad_len = outputdatalength - reply_len;
	if (pad_len > 0) {
		if (pad_len < 10)
			return -EINVAL;
		/* 'restore' padding left in the PCICC/PCIXCC card. */
		if (copy_to_user(outputdata, static_pad, pad_len - 1))
			return -EFAULT;
		if (put_user(0, outputdata + pad_len - 1))
			return -EFAULT;
	}
	/* Copy the crypto response to user space. */
	if (copy_to_user(outputdata + pad_len, data, reply_len))
		return -EFAULT;
	return 0;
}

/**
 * Copy results from a type 86 XCRB reply message back to user space.
 *
 * @zdev: crypto device pointer
 * @reply: reply AP message.
 * @xcRB: pointer to XCRB
 *
 * Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
 */
static int convert_type86_xcrb(struct zcrypt_device *zdev,
			       struct ap_message *reply,
			       struct ica_xcRB *xcRB)
{
	struct type86_fmt2_msg *msg = reply->message;
	char *data = reply->message;

	/* Copy CPRB to user */
	if (copy_to_user(xcRB->reply_control_blk_addr,
		data + msg->fmt2.offset1, msg->fmt2.count1))
		return -EFAULT;
	xcRB->reply_control_blk_length = msg->fmt2.count1;

	/* Copy data buffer to user */
	if (msg->fmt2.count2)
		if (copy_to_user(xcRB->reply_data_addr,
			data + msg->fmt2.offset2, msg->fmt2.count2))
			return -EFAULT;
	xcRB->reply_data_length = msg->fmt2.count2;
	return 0;
}

static int convert_type86_rng(struct zcrypt_device *zdev,
			  struct ap_message *reply,
			  char *buffer)
{
	struct {
		struct type86_hdr hdr;
		struct type86_fmt2_ext fmt2;
		struct CPRBX cprbx;
	} __attribute__((packed)) *msg = reply->message;
	char *data = reply->message;

	if (msg->cprbx.ccp_rtcode != 0 || msg->cprbx.ccp_rscode != 0) {
		PDEBUG("RNG response error on PCIXCC/CEX2C rc=%hu/rs=%hu\n",
		       rc, rs);
		return -EINVAL;
	}
	memcpy(buffer, data + msg->fmt2.offset2, msg->fmt2.count2);
	return msg->fmt2.count2;
}

static int convert_response_ica(struct zcrypt_device *zdev,
			    struct ap_message *reply,
			    char __user *outputdata,
			    unsigned int outputdatalength)
{
	struct type86x_reply *msg = reply->message;

	/* Response type byte is the second byte in the response. */
	switch (((unsigned char *) reply->message)[1]) {
	case TYPE82_RSP_CODE:
	case TYPE88_RSP_CODE:
		return convert_error(zdev, reply);
	case TYPE86_RSP_CODE:
		if (msg->hdr.reply_code)
			return convert_error(zdev, reply);
		if (msg->cprbx.cprb_ver_id == 0x02)
			return convert_type86_ica(zdev, reply,
						  outputdata, outputdatalength);
		/* no break, incorrect cprb version is an unknown response */
	default: /* Unknown response type, this should NEVER EVER happen */
		PRINTK("Unrecognized Message Header: %08x%08x\n",
		       *(unsigned int *) reply->message,
		       *(unsigned int *) (reply->message+4));
		zdev->online = 0;
		return -EAGAIN;	/* repeat the request on a different device. */
	}
}

static int convert_response_xcrb(struct zcrypt_device *zdev,
			    struct ap_message *reply,
			    struct ica_xcRB *xcRB)
{
	struct type86x_reply *msg = reply->message;

	/* Response type byte is the second byte in the response. */
	switch (((unsigned char *) reply->message)[1]) {
	case TYPE82_RSP_CODE:
	case TYPE88_RSP_CODE:
		xcRB->status = 0x0008044DL; /* HDD_InvalidParm */
		return convert_error(zdev, reply);
	case TYPE86_RSP_CODE:
		if (msg->hdr.reply_code) {
			memcpy(&(xcRB->status), msg->fmt2.apfs, sizeof(u32));
			return convert_error(zdev, reply);
		}
		if (msg->cprbx.cprb_ver_id == 0x02)
			return convert_type86_xcrb(zdev, reply, xcRB);
		/* no break, incorrect cprb version is an unknown response */
	default: /* Unknown response type, this should NEVER EVER happen */
		PRINTK("Unrecognized Message Header: %08x%08x\n",
		       *(unsigned int *) reply->message,
		       *(unsigned int *) (reply->message+4));
		xcRB->status = 0x0008044DL; /* HDD_InvalidParm */
		zdev->online = 0;
		return -EAGAIN;	/* repeat the request on a different device. */
	}
}

static int convert_response_rng(struct zcrypt_device *zdev,
				 struct ap_message *reply,
				 char *data)
{
	struct type86x_reply *msg = reply->message;

	switch (msg->hdr.type) {
	case TYPE82_RSP_CODE:
	case TYPE88_RSP_CODE:
		return -EINVAL;
	case TYPE86_RSP_CODE:
		if (msg->hdr.reply_code)
			return -EINVAL;
		if (msg->cprbx.cprb_ver_id == 0x02)
			return convert_type86_rng(zdev, reply, data);
		/* no break, incorrect cprb version is an unknown response */
	default: /* Unknown response type, this should NEVER EVER happen */
		PRINTK("Unrecognized Message Header: %08x%08x\n",
		       *(unsigned int *) reply->message,
		       *(unsigned int *) (reply->message+4));
		zdev->online = 0;
		return -EAGAIN;	/* repeat the request on a different device. */
	}
}

/**
 * This function is called from the AP bus code after a crypto request
 * "msg" has finished with the reply message "reply".
 * It is called from tasklet context.
 * @ap_dev: pointer to the AP device
 * @msg: pointer to the AP message
 * @reply: pointer to the AP reply message
 */
static void zcrypt_pcixcc_receive(struct ap_device *ap_dev,
				  struct ap_message *msg,
				  struct ap_message *reply)
{
	static struct error_hdr error_reply = {
		.type = TYPE82_RSP_CODE,
		.reply_code = REP82_ERROR_MACHINE_FAILURE,
	};
	struct response_type *resp_type =
		(struct response_type *) msg->private;
	struct type86x_reply *t86r = reply->message;
	int length;

	/* Copy the reply message to the request message buffer. */
	if (IS_ERR(reply))
		memcpy(msg->message, &error_reply, sizeof(error_reply));
	else if (t86r->hdr.type == TYPE86_RSP_CODE &&
		 t86r->cprbx.cprb_ver_id == 0x02) {
		switch (resp_type->type) {
		case PCIXCC_RESPONSE_TYPE_ICA:
			length = sizeof(struct type86x_reply)
				+ t86r->length - 2;
			length = min(PCIXCC_MAX_ICA_RESPONSE_SIZE, length);
			memcpy(msg->message, reply->message, length);
			break;
		case PCIXCC_RESPONSE_TYPE_XCRB:
			length = t86r->fmt2.offset2 + t86r->fmt2.count2;
			length = min(PCIXCC_MAX_XCRB_RESPONSE_SIZE, length);
			memcpy(msg->message, reply->message, length);
			break;
		default:
			PRINTK("Invalid internal response type: %i\n",
			    resp_type->type);
			memcpy(msg->message, &error_reply,
			    sizeof error_reply);
		}
	} else
		memcpy(msg->message, reply->message, sizeof error_reply);
	complete(&(resp_type->work));
}

static atomic_t zcrypt_step = ATOMIC_INIT(0);

/**
 * The request distributor calls this function if it picked the PCIXCC/CEX2C
 * device to handle a modexpo request.
 * @zdev: pointer to zcrypt_device structure that identifies the
 *	  PCIXCC/CEX2C device to the request distributor
 * @mex: pointer to the modexpo request buffer
 */
static long zcrypt_pcixcc_modexpo(struct zcrypt_device *zdev,
				  struct ica_rsa_modexpo *mex)
{
	struct ap_message ap_msg;
	struct response_type resp_type = {
		.type = PCIXCC_RESPONSE_TYPE_ICA,
	};
	int rc;

	ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
	if (!ap_msg.message)
		return -ENOMEM;
	ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
				atomic_inc_return(&zcrypt_step);
	ap_msg.private = &resp_type;
	rc = ICAMEX_msg_to_type6MEX_msgX(zdev, &ap_msg, mex);
	if (rc)
		goto out_free;
	init_completion(&resp_type.work);
	ap_queue_message(zdev->ap_dev, &ap_msg);
	rc = wait_for_completion_interruptible(&resp_type.work);
	if (rc == 0)
		rc = convert_response_ica(zdev, &ap_msg, mex->outputdata,
					  mex->outputdatalength);
	else
		/* Signal pending. */
		ap_cancel_message(zdev->ap_dev, &ap_msg);
out_free:
	free_page((unsigned long) ap_msg.message);
	return rc;
}

/**
 * The request distributor calls this function if it picked the PCIXCC/CEX2C
 * device to handle a modexpo_crt request.
 * @zdev: pointer to zcrypt_device structure that identifies the
 *	  PCIXCC/CEX2C device to the request distributor
 * @crt: pointer to the modexpoc_crt request buffer
 */
static long zcrypt_pcixcc_modexpo_crt(struct zcrypt_device *zdev,
				      struct ica_rsa_modexpo_crt *crt)
{
	struct ap_message ap_msg;
	struct response_type resp_type = {
		.type = PCIXCC_RESPONSE_TYPE_ICA,
	};
	int rc;

	ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
	if (!ap_msg.message)
		return -ENOMEM;
	ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
				atomic_inc_return(&zcrypt_step);
	ap_msg.private = &resp_type;
	rc = ICACRT_msg_to_type6CRT_msgX(zdev, &ap_msg, crt);
	if (rc)
		goto out_free;
	init_completion(&resp_type.work);
	ap_queue_message(zdev->ap_dev, &ap_msg);
	rc = wait_for_completion_interruptible(&resp_type.work);
	if (rc == 0)
		rc = convert_response_ica(zdev, &ap_msg, crt->outputdata,
					  crt->outputdatalength);
	else
		/* Signal pending. */
		ap_cancel_message(zdev->ap_dev, &ap_msg);
out_free:
	free_page((unsigned long) ap_msg.message);
	return rc;
}

/**
 * The request distributor calls this function if it picked the PCIXCC/CEX2C
 * device to handle a send_cprb request.
 * @zdev: pointer to zcrypt_device structure that identifies the
 *	  PCIXCC/CEX2C device to the request distributor
 * @xcRB: pointer to the send_cprb request buffer
 */
static long zcrypt_pcixcc_send_cprb(struct zcrypt_device *zdev,
				    struct ica_xcRB *xcRB)
{
	struct ap_message ap_msg;
	struct response_type resp_type = {
		.type = PCIXCC_RESPONSE_TYPE_XCRB,
	};
	int rc;

	ap_msg.message = kmalloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
	if (!ap_msg.message)
		return -ENOMEM;
	ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
				atomic_inc_return(&zcrypt_step);
	ap_msg.private = &resp_type;
	rc = XCRB_msg_to_type6CPRB_msgX(zdev, &ap_msg, xcRB);
	if (rc)
		goto out_free;
	init_completion(&resp_type.work);
	ap_queue_message(zdev->ap_dev, &ap_msg);
	rc = wait_for_completion_interruptible(&resp_type.work);
	if (rc == 0)
		rc = convert_response_xcrb(zdev, &ap_msg, xcRB);
	else
		/* Signal pending. */
		ap_cancel_message(zdev->ap_dev, &ap_msg);
out_free:
	memset(ap_msg.message, 0x0, ap_msg.length);
	kfree(ap_msg.message);
	return rc;
}

/**
 * The request distributor calls this function if it picked the PCIXCC/CEX2C
 * device to generate random data.
 * @zdev: pointer to zcrypt_device structure that identifies the
 *	  PCIXCC/CEX2C device to the request distributor
 * @buffer: pointer to a memory page to return random data
 */

static long zcrypt_pcixcc_rng(struct zcrypt_device *zdev,
				    char *buffer)
{
	struct ap_message ap_msg;
	struct response_type resp_type = {
		.type = PCIXCC_RESPONSE_TYPE_XCRB,
	};
	int rc;

	ap_msg.message = kmalloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
	if (!ap_msg.message)
		return -ENOMEM;
	ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
				atomic_inc_return(&zcrypt_step);
	ap_msg.private = &resp_type;
	rng_type6CPRB_msgX(zdev->ap_dev, &ap_msg, ZCRYPT_RNG_BUFFER_SIZE);
	init_completion(&resp_type.work);
	ap_queue_message(zdev->ap_dev, &ap_msg);
	rc = wait_for_completion_interruptible(&resp_type.work);
	if (rc == 0)
		rc = convert_response_rng(zdev, &ap_msg, buffer);
	else
		/* Signal pending. */
		ap_cancel_message(zdev->ap_dev, &ap_msg);
	kfree(ap_msg.message);
	return rc;
}

/**
 * The crypto operations for a PCIXCC/CEX2C card.
 */
static struct zcrypt_ops zcrypt_pcixcc_ops = {
	.rsa_modexpo = zcrypt_pcixcc_modexpo,
	.rsa_modexpo_crt = zcrypt_pcixcc_modexpo_crt,
	.send_cprb = zcrypt_pcixcc_send_cprb,
};

static struct zcrypt_ops zcrypt_pcixcc_with_rng_ops = {
	.rsa_modexpo = zcrypt_pcixcc_modexpo,
	.rsa_modexpo_crt = zcrypt_pcixcc_modexpo_crt,
	.send_cprb = zcrypt_pcixcc_send_cprb,
	.rng = zcrypt_pcixcc_rng,
};

/**
 * Micro-code detection function. Its sends a message to a pcixcc card
 * to find out the microcode level.
 * @ap_dev: pointer to the AP device.
 */
static int zcrypt_pcixcc_mcl(struct ap_device *ap_dev)
{
	static unsigned char msg[] = {
		0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x43,0x41,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x00,
		0x00,0x00,0x01,0xC4,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x07,0x24,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0xDC,0x02,0x00,0x00,0x00,0x54,0x32,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE8,
		0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x24,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x0A,
		0x4D,0x52,0x50,0x20,0x20,0x20,0x20,0x20,
		0x00,0x42,0x00,0x01,0x02,0x03,0x04,0x05,
		0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,
		0x0E,0x0F,0x00,0x11,0x22,0x33,0x44,0x55,
		0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,
		0xEE,0xFF,0xFF,0xEE,0xDD,0xCC,0xBB,0xAA,
		0x99,0x88,0x77,0x66,0x55,0x44,0x33,0x22,
		0x11,0x00,0x01,0x23,0x45,0x67,0x89,0xAB,
		0xCD,0xEF,0xFE,0xDC,0xBA,0x98,0x76,0x54,
		0x32,0x10,0x00,0x9A,0x00,0x98,0x00,0x00,
		0x1E,0x00,0x00,0x94,0x00,0x00,0x00,0x00,
		0x04,0x00,0x00,0x8C,0x00,0x00,0x00,0x40,
		0x02,0x00,0x00,0x40,0xBA,0xE8,0x23,0x3C,
		0x75,0xF3,0x91,0x61,0xD6,0x73,0x39,0xCF,
		0x7B,0x6D,0x8E,0x61,0x97,0x63,0x9E,0xD9,
		0x60,0x55,0xD6,0xC7,0xEF,0xF8,0x1E,0x63,
		0x95,0x17,0xCC,0x28,0x45,0x60,0x11,0xC5,
		0xC4,0x4E,0x66,0xC6,0xE6,0xC3,0xDE,0x8A,
		0x19,0x30,0xCF,0x0E,0xD7,0xAA,0xDB,0x01,
		0xD8,0x00,0xBB,0x8F,0x39,0x9F,0x64,0x28,
		0xF5,0x7A,0x77,0x49,0xCC,0x6B,0xA3,0x91,
		0x97,0x70,0xE7,0x60,0x1E,0x39,0xE1,0xE5,
		0x33,0xE1,0x15,0x63,0x69,0x08,0x80,0x4C,
		0x67,0xC4,0x41,0x8F,0x48,0xDF,0x26,0x98,
		0xF1,0xD5,0x8D,0x88,0xD9,0x6A,0xA4,0x96,
		0xC5,0x84,0xD9,0x30,0x49,0x67,0x7D,0x19,
		0xB1,0xB3,0x45,0x4D,0xB2,0x53,0x9A,0x47,
		0x3C,0x7C,0x55,0xBF,0xCC,0x85,0x00,0x36,
		0xF1,0x3D,0x93,0x53
	};
	unsigned long long psmid;
	struct CPRBX *cprbx;
	char *reply;
	int rc, i;

	reply = (void *) get_zeroed_page(GFP_KERNEL);
	if (!reply)
		return -ENOMEM;

	rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, msg, sizeof(msg));
	if (rc)
		goto out_free;

	/* Wait for the test message to complete. */
	for (i = 0; i < 6; i++) {
		mdelay(300);
		rc = ap_recv(ap_dev->qid, &psmid, reply, 4096);
		if (rc == 0 && psmid == 0x0102030405060708ULL)
			break;
	}

	if (i >= 6) {
		/* Got no answer. */
		rc = -ENODEV;
		goto out_free;
	}

	cprbx = (struct CPRBX *) (reply + 48);
	if (cprbx->ccp_rtcode == 8 && cprbx->ccp_rscode == 33)
		rc = ZCRYPT_PCIXCC_MCL2;
	else
		rc = ZCRYPT_PCIXCC_MCL3;
out_free:
	free_page((unsigned long) reply);
	return rc;
}

/**
 * Large random number detection function. Its sends a message to a pcixcc
 * card to find out if large random numbers are supported.
 * @ap_dev: pointer to the AP device.
 *
 * Returns 1 if large random numbers are supported, 0 if not and < 0 on error.
 */
static int zcrypt_pcixcc_rng_supported(struct ap_device *ap_dev)
{
	struct ap_message ap_msg;
	unsigned long long psmid;
	struct {
		struct type86_hdr hdr;
		struct type86_fmt2_ext fmt2;
		struct CPRBX cprbx;
	} __attribute__((packed)) *reply;
	int rc, i;

	ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
	if (!ap_msg.message)
		return -ENOMEM;

	rng_type6CPRB_msgX(ap_dev, &ap_msg, 4);
	rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, ap_msg.message,
		     ap_msg.length);
	if (rc)
		goto out_free;

	/* Wait for the test message to complete. */
	for (i = 0; i < 2 * HZ; i++) {
		msleep(1000 / HZ);
		rc = ap_recv(ap_dev->qid, &psmid, ap_msg.message, 4096);
		if (rc == 0 && psmid == 0x0102030405060708ULL)
			break;
	}

	if (i >= 2 * HZ) {
		/* Got no answer. */
		rc = -ENODEV;
		goto out_free;
	}

	reply = ap_msg.message;
	if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0)
		rc = 1;
	else
		rc = 0;
out_free:
	free_page((unsigned long) ap_msg.message);
	return rc;
}

/**
 * Probe function for PCIXCC/CEX2C cards. It always accepts the AP device
 * since the bus_match already checked the hardware type. The PCIXCC
 * cards come in two flavours: micro code level 2 and micro code level 3.
 * This is checked by sending a test message to the device.
 * @ap_dev: pointer to the AP device.
 */
static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
{
	struct zcrypt_device *zdev;
	int rc;

	zdev = zcrypt_device_alloc(PCIXCC_MAX_RESPONSE_SIZE);
	if (!zdev)
		return -ENOMEM;
	zdev->ap_dev = ap_dev;
	zdev->online = 1;
	if (ap_dev->device_type == AP_DEVICE_TYPE_PCIXCC) {
		rc = zcrypt_pcixcc_mcl(ap_dev);
		if (rc < 0) {
			zcrypt_device_free(zdev);
			return rc;
		}
		zdev->user_space_type = rc;
		if (rc == ZCRYPT_PCIXCC_MCL2) {
			zdev->type_string = "PCIXCC_MCL2";
			zdev->speed_rating = PCIXCC_MCL2_SPEED_RATING;
			zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
			zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
		} else {
			zdev->type_string = "PCIXCC_MCL3";
			zdev->speed_rating = PCIXCC_MCL3_SPEED_RATING;
			zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
			zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
		}
	} else {
		zdev->user_space_type = ZCRYPT_CEX2C;
		zdev->type_string = "CEX2C";
		zdev->speed_rating = CEX2C_SPEED_RATING;
		zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
		zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
	}
	rc = zcrypt_pcixcc_rng_supported(ap_dev);
	if (rc < 0) {
		zcrypt_device_free(zdev);
		return rc;
	}
	if (rc)
		zdev->ops = &zcrypt_pcixcc_with_rng_ops;
	else
		zdev->ops = &zcrypt_pcixcc_ops;
	ap_dev->reply = &zdev->reply;
	ap_dev->private = zdev;
	rc = zcrypt_device_register(zdev);
	if (rc)
		goto out_free;
	return 0;

 out_free:
	ap_dev->private = NULL;
	zcrypt_device_free(zdev);
	return rc;
}

/**
 * This is called to remove the extended PCIXCC/CEX2C driver information
 * if an AP device is removed.
 */
static void zcrypt_pcixcc_remove(struct ap_device *ap_dev)
{
	struct zcrypt_device *zdev = ap_dev->private;

	zcrypt_device_unregister(zdev);
}

int __init zcrypt_pcixcc_init(void)
{
	return ap_driver_register(&zcrypt_pcixcc_driver, THIS_MODULE, "pcixcc");
}

void zcrypt_pcixcc_exit(void)
{
	ap_driver_unregister(&zcrypt_pcixcc_driver);
}

#ifndef CONFIG_ZCRYPT_MONOLITHIC
module_init(zcrypt_pcixcc_init);
module_exit(zcrypt_pcixcc_exit);
#endif