Free Electrons

Embedded Linux Experts

   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
/*
 *  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) },
	{ AP_DEVICE(AP_DEVICE_TYPE_CEX2C2) },
	{ /* 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)
		return -EFAULT;
	if (CEIL4(xcRB->reply_control_blk_length) > PCIXCC_MAX_XCRB_REPLY_SIZE)
		return -EFAULT;
	if (CEIL4(xcRB->reply_data_length) > PCIXCC_MAX_XCRB_DATA_SIZE)
		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) {
		xcRB->reply_control_blk_length = PCIXCC_MAX_XCRB_RESPONSE_SIZE -
			(sizeof(struct type86_fmt2_msg) +
			    CEIL4(xcRB->reply_data_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)
		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)
			return -EINVAL;
		if (service_rc == 8 && service_rs == 65)
			return -EINVAL;
		if (service_rc == 8 && service_rs == 770)
			return -EINVAL;
		if (service_rc == 8 && service_rs == 783) {
			zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
			return -EAGAIN;
		}
		if (service_rc == 12 && service_rs == 769)
			return -EINVAL;
		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)
		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 */
		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 */
		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 */
		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;
	int length;

	/* Copy the reply message to the request message buffer. */
	if (IS_ERR(reply)) {
		memcpy(msg->message, &error_reply, sizeof(error_reply));
		goto out;
	}
	t86r = reply->message;
	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:
			memcpy(msg->message, &error_reply, sizeof error_reply);
		}
	} else
		memcpy(msg->message, reply->message, sizeof error_reply);
out:
	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