Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2016 Broadcom
 */

/*
 * This file works with the SPU2 version of the SPU. SPU2 has different message
 * formats than the previous version of the SPU. All SPU message format
 * differences should be hidden in the spux.c,h files.
 */

#include <linux/kernel.h>
#include <linux/string.h>

#include "util.h"
#include "spu.h"
#include "spu2.h"

#define SPU2_TX_STATUS_LEN  0	/* SPU2 has no STATUS in input packet */

/*
 * Controlled by pkt_stat_cnt field in CRYPTO_SS_SPU0_CORE_SPU2_CONTROL0
 * register. Defaults to 2.
 */
#define SPU2_RX_STATUS_LEN  2

enum spu2_proto_sel {
	SPU2_PROTO_RESV = 0,
	SPU2_MACSEC_SECTAG8_ECB = 1,
	SPU2_MACSEC_SECTAG8_SCB = 2,
	SPU2_MACSEC_SECTAG16 = 3,
	SPU2_MACSEC_SECTAG16_8_XPN = 4,
	SPU2_IPSEC = 5,
	SPU2_IPSEC_ESN = 6,
	SPU2_TLS_CIPHER = 7,
	SPU2_TLS_AEAD = 8,
	SPU2_DTLS_CIPHER = 9,
	SPU2_DTLS_AEAD = 10
};

static char *spu2_cipher_type_names[] = { "None", "AES128", "AES192", "AES256",
	"DES", "3DES"
};

static char *spu2_cipher_mode_names[] = { "ECB", "CBC", "CTR", "CFB", "OFB",
	"XTS", "CCM", "GCM"
};

static char *spu2_hash_type_names[] = { "None", "AES128", "AES192", "AES256",
	"Reserved", "Reserved", "MD5", "SHA1", "SHA224", "SHA256", "SHA384",
	"SHA512", "SHA512/224", "SHA512/256", "SHA3-224", "SHA3-256",
	"SHA3-384", "SHA3-512"
};

static char *spu2_hash_mode_names[] = { "CMAC", "CBC-MAC", "XCBC-MAC", "HMAC",
	"Rabin", "CCM", "GCM", "Reserved"
};

static char *spu2_ciph_type_name(enum spu2_cipher_type cipher_type)
{
	if (cipher_type >= SPU2_CIPHER_TYPE_LAST)
		return "Reserved";
	return spu2_cipher_type_names[cipher_type];
}

static char *spu2_ciph_mode_name(enum spu2_cipher_mode cipher_mode)
{
	if (cipher_mode >= SPU2_CIPHER_MODE_LAST)
		return "Reserved";
	return spu2_cipher_mode_names[cipher_mode];
}

static char *spu2_hash_type_name(enum spu2_hash_type hash_type)
{
	if (hash_type >= SPU2_HASH_TYPE_LAST)
		return "Reserved";
	return spu2_hash_type_names[hash_type];
}

static char *spu2_hash_mode_name(enum spu2_hash_mode hash_mode)
{
	if (hash_mode >= SPU2_HASH_MODE_LAST)
		return "Reserved";
	return spu2_hash_mode_names[hash_mode];
}

/*
 * Convert from a software cipher mode value to the corresponding value
 * for SPU2.
 */
static int spu2_cipher_mode_xlate(enum spu_cipher_mode cipher_mode,
				  enum spu2_cipher_mode *spu2_mode)
{
	switch (cipher_mode) {
	case CIPHER_MODE_ECB:
		*spu2_mode = SPU2_CIPHER_MODE_ECB;
		break;
	case CIPHER_MODE_CBC:
		*spu2_mode = SPU2_CIPHER_MODE_CBC;
		break;
	case CIPHER_MODE_OFB:
		*spu2_mode = SPU2_CIPHER_MODE_OFB;
		break;
	case CIPHER_MODE_CFB:
		*spu2_mode = SPU2_CIPHER_MODE_CFB;
		break;
	case CIPHER_MODE_CTR:
		*spu2_mode = SPU2_CIPHER_MODE_CTR;
		break;
	case CIPHER_MODE_CCM:
		*spu2_mode = SPU2_CIPHER_MODE_CCM;
		break;
	case CIPHER_MODE_GCM:
		*spu2_mode = SPU2_CIPHER_MODE_GCM;
		break;
	case CIPHER_MODE_XTS:
		*spu2_mode = SPU2_CIPHER_MODE_XTS;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

/**
 * spu2_cipher_xlate() - Convert a cipher {alg/mode/type} triple to a SPU2
 * cipher type and mode.
 * @cipher_alg:  [in]  cipher algorithm value from software enumeration
 * @cipher_mode: [in]  cipher mode value from software enumeration
 * @cipher_type: [in]  cipher type value from software enumeration
 * @spu2_type:   [out] cipher type value used by spu2 hardware
 * @spu2_mode:   [out] cipher mode value used by spu2 hardware
 *
 * Return:  0 if successful
 */
static int spu2_cipher_xlate(enum spu_cipher_alg cipher_alg,
			     enum spu_cipher_mode cipher_mode,
			     enum spu_cipher_type cipher_type,
			     enum spu2_cipher_type *spu2_type,
			     enum spu2_cipher_mode *spu2_mode)
{
	int err;

	err = spu2_cipher_mode_xlate(cipher_mode, spu2_mode);
	if (err) {
		flow_log("Invalid cipher mode %d\n", cipher_mode);
		return err;
	}

	switch (cipher_alg) {
	case CIPHER_ALG_NONE:
		*spu2_type = SPU2_CIPHER_TYPE_NONE;
		break;
	case CIPHER_ALG_RC4:
		/* SPU2 does not support RC4 */
		err = -EINVAL;
		*spu2_type = SPU2_CIPHER_TYPE_NONE;
		break;
	case CIPHER_ALG_DES:
		*spu2_type = SPU2_CIPHER_TYPE_DES;
		break;
	case CIPHER_ALG_3DES:
		*spu2_type = SPU2_CIPHER_TYPE_3DES;
		break;
	case CIPHER_ALG_AES:
		switch (cipher_type) {
		case CIPHER_TYPE_AES128:
			*spu2_type = SPU2_CIPHER_TYPE_AES128;
			break;
		case CIPHER_TYPE_AES192:
			*spu2_type = SPU2_CIPHER_TYPE_AES192;
			break;
		case CIPHER_TYPE_AES256:
			*spu2_type = SPU2_CIPHER_TYPE_AES256;
			break;
		default:
			err = -EINVAL;
		}
		break;
	case CIPHER_ALG_LAST:
	default:
		err = -EINVAL;
		break;
	}

	if (err)
		flow_log("Invalid cipher alg %d or type %d\n",
			 cipher_alg, cipher_type);
	return err;
}

/*
 * Convert from a software hash mode value to the corresponding value
 * for SPU2. Note that HASH_MODE_NONE and HASH_MODE_XCBC have the same value.
 */
static int spu2_hash_mode_xlate(enum hash_mode hash_mode,
				enum spu2_hash_mode *spu2_mode)
{
	switch (hash_mode) {
	case HASH_MODE_XCBC:
		*spu2_mode = SPU2_HASH_MODE_XCBC_MAC;
		break;
	case HASH_MODE_CMAC:
		*spu2_mode = SPU2_HASH_MODE_CMAC;
		break;
	case HASH_MODE_HMAC:
		*spu2_mode = SPU2_HASH_MODE_HMAC;
		break;
	case HASH_MODE_CCM:
		*spu2_mode = SPU2_HASH_MODE_CCM;
		break;
	case HASH_MODE_GCM:
		*spu2_mode = SPU2_HASH_MODE_GCM;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

/**
 * spu2_hash_xlate() - Convert a hash {alg/mode/type} triple to a SPU2 hash type
 * and mode.
 * @hash_alg:  [in] hash algorithm value from software enumeration
 * @hash_mode: [in] hash mode value from software enumeration
 * @hash_type: [in] hash type value from software enumeration
 * @ciph_type: [in] cipher type value from software enumeration
 * @spu2_type: [out] hash type value used by SPU2 hardware
 * @spu2_mode: [out] hash mode value used by SPU2 hardware
 *
 * Return:  0 if successful
 */
static int
spu2_hash_xlate(enum hash_alg hash_alg, enum hash_mode hash_mode,
		enum hash_type hash_type, enum spu_cipher_type ciph_type,
		enum spu2_hash_type *spu2_type, enum spu2_hash_mode *spu2_mode)
{
	int err;

	err = spu2_hash_mode_xlate(hash_mode, spu2_mode);
	if (err) {
		flow_log("Invalid hash mode %d\n", hash_mode);
		return err;
	}

	switch (hash_alg) {
	case HASH_ALG_NONE:
		*spu2_type = SPU2_HASH_TYPE_NONE;
		break;
	case HASH_ALG_MD5:
		*spu2_type = SPU2_HASH_TYPE_MD5;
		break;
	case HASH_ALG_SHA1:
		*spu2_type = SPU2_HASH_TYPE_SHA1;
		break;
	case HASH_ALG_SHA224:
		*spu2_type = SPU2_HASH_TYPE_SHA224;
		break;
	case HASH_ALG_SHA256:
		*spu2_type = SPU2_HASH_TYPE_SHA256;
		break;
	case HASH_ALG_SHA384:
		*spu2_type = SPU2_HASH_TYPE_SHA384;
		break;
	case HASH_ALG_SHA512:
		*spu2_type = SPU2_HASH_TYPE_SHA512;
		break;
	case HASH_ALG_AES:
		switch (ciph_type) {
		case CIPHER_TYPE_AES128:
			*spu2_type = SPU2_HASH_TYPE_AES128;
			break;
		case CIPHER_TYPE_AES192:
			*spu2_type = SPU2_HASH_TYPE_AES192;
			break;
		case CIPHER_TYPE_AES256:
			*spu2_type = SPU2_HASH_TYPE_AES256;
			break;
		default:
			err = -EINVAL;
		}
		break;
	case HASH_ALG_SHA3_224:
		*spu2_type = SPU2_HASH_TYPE_SHA3_224;
		break;
	case HASH_ALG_SHA3_256:
		*spu2_type = SPU2_HASH_TYPE_SHA3_256;
		break;
	case HASH_ALG_SHA3_384:
		*spu2_type = SPU2_HASH_TYPE_SHA3_384;
		break;
	case HASH_ALG_SHA3_512:
		*spu2_type = SPU2_HASH_TYPE_SHA3_512;
		break;
	case HASH_ALG_LAST:
	default:
		err = -EINVAL;
		break;
	}

	if (err)
		flow_log("Invalid hash alg %d or type %d\n",
			 hash_alg, hash_type);
	return err;
}

/* Dump FMD ctrl0. The ctrl0 input is in host byte order */
static void spu2_dump_fmd_ctrl0(u64 ctrl0)
{
	enum spu2_cipher_type ciph_type;
	enum spu2_cipher_mode ciph_mode;
	enum spu2_hash_type hash_type;
	enum spu2_hash_mode hash_mode;
	char *ciph_name;
	char *ciph_mode_name;
	char *hash_name;
	char *hash_mode_name;
	u8 cfb;
	u8 proto;

	packet_log(" FMD CTRL0 %#16llx\n", ctrl0);
	if (ctrl0 & SPU2_CIPH_ENCRYPT_EN)
		packet_log("  encrypt\n");
	else
		packet_log("  decrypt\n");

	ciph_type = (ctrl0 & SPU2_CIPH_TYPE) >> SPU2_CIPH_TYPE_SHIFT;
	ciph_name = spu2_ciph_type_name(ciph_type);
	packet_log("  Cipher type: %s\n", ciph_name);

	if (ciph_type != SPU2_CIPHER_TYPE_NONE) {
		ciph_mode = (ctrl0 & SPU2_CIPH_MODE) >> SPU2_CIPH_MODE_SHIFT;
		ciph_mode_name = spu2_ciph_mode_name(ciph_mode);
		packet_log("  Cipher mode: %s\n", ciph_mode_name);
	}

	cfb = (ctrl0 & SPU2_CFB_MASK) >> SPU2_CFB_MASK_SHIFT;
	packet_log("  CFB %#x\n", cfb);

	proto = (ctrl0 & SPU2_PROTO_SEL) >> SPU2_PROTO_SEL_SHIFT;
	packet_log("  protocol %#x\n", proto);

	if (ctrl0 & SPU2_HASH_FIRST)
		packet_log("  hash first\n");
	else
		packet_log("  cipher first\n");

	if (ctrl0 & SPU2_CHK_TAG)
		packet_log("  check tag\n");

	hash_type = (ctrl0 & SPU2_HASH_TYPE) >> SPU2_HASH_TYPE_SHIFT;
	hash_name = spu2_hash_type_name(hash_type);
	packet_log("  Hash type: %s\n", hash_name);

	if (hash_type != SPU2_HASH_TYPE_NONE) {
		hash_mode = (ctrl0 & SPU2_HASH_MODE) >> SPU2_HASH_MODE_SHIFT;
		hash_mode_name = spu2_hash_mode_name(hash_mode);
		packet_log("  Hash mode: %s\n", hash_mode_name);
	}

	if (ctrl0 & SPU2_CIPH_PAD_EN) {
		packet_log("  Cipher pad: %#2llx\n",
			   (ctrl0 & SPU2_CIPH_PAD) >> SPU2_CIPH_PAD_SHIFT);
	}
}

/* Dump FMD ctrl1. The ctrl1 input is in host byte order */
static void spu2_dump_fmd_ctrl1(u64 ctrl1)
{
	u8 hash_key_len;
	u8 ciph_key_len;
	u8 ret_iv_len;
	u8 iv_offset;
	u8 iv_len;
	u8 hash_tag_len;
	u8 ret_md;

	packet_log(" FMD CTRL1 %#16llx\n", ctrl1);
	if (ctrl1 & SPU2_TAG_LOC)
		packet_log("  Tag after payload\n");

	packet_log("  Msg includes ");
	if (ctrl1 & SPU2_HAS_FR_DATA)
		packet_log("FD ");
	if (ctrl1 & SPU2_HAS_AAD1)
		packet_log("AAD1 ");
	if (ctrl1 & SPU2_HAS_NAAD)
		packet_log("NAAD ");
	if (ctrl1 & SPU2_HAS_AAD2)
		packet_log("AAD2 ");
	if (ctrl1 & SPU2_HAS_ESN)
		packet_log("ESN ");
	packet_log("\n");

	hash_key_len = (ctrl1 & SPU2_HASH_KEY_LEN) >> SPU2_HASH_KEY_LEN_SHIFT;
	packet_log("  Hash key len %u\n", hash_key_len);

	ciph_key_len = (ctrl1 & SPU2_CIPH_KEY_LEN) >> SPU2_CIPH_KEY_LEN_SHIFT;
	packet_log("  Cipher key len %u\n", ciph_key_len);

	if (ctrl1 & SPU2_GENIV)
		packet_log("  Generate IV\n");

	if (ctrl1 & SPU2_HASH_IV)
		packet_log("  IV included in hash\n");

	if (ctrl1 & SPU2_RET_IV)
		packet_log("  Return IV in output before payload\n");

	ret_iv_len = (ctrl1 & SPU2_RET_IV_LEN) >> SPU2_RET_IV_LEN_SHIFT;
	packet_log("  Length of returned IV %u bytes\n",
		   ret_iv_len ? ret_iv_len : 16);

	iv_offset = (ctrl1 & SPU2_IV_OFFSET) >> SPU2_IV_OFFSET_SHIFT;
	packet_log("  IV offset %u\n", iv_offset);

	iv_len = (ctrl1 & SPU2_IV_LEN) >> SPU2_IV_LEN_SHIFT;
	packet_log("  Input IV len %u bytes\n", iv_len);

	hash_tag_len = (ctrl1 & SPU2_HASH_TAG_LEN) >> SPU2_HASH_TAG_LEN_SHIFT;
	packet_log("  Hash tag length %u bytes\n", hash_tag_len);

	packet_log("  Return ");
	ret_md = (ctrl1 & SPU2_RETURN_MD) >> SPU2_RETURN_MD_SHIFT;
	if (ret_md)
		packet_log("FMD ");
	if (ret_md == SPU2_RET_FMD_OMD)
		packet_log("OMD ");
	else if (ret_md == SPU2_RET_FMD_OMD_IV)
		packet_log("OMD IV ");
	if (ctrl1 & SPU2_RETURN_FD)
		packet_log("FD ");
	if (ctrl1 & SPU2_RETURN_AAD1)
		packet_log("AAD1 ");
	if (ctrl1 & SPU2_RETURN_NAAD)
		packet_log("NAAD ");
	if (ctrl1 & SPU2_RETURN_AAD2)
		packet_log("AAD2 ");
	if (ctrl1 & SPU2_RETURN_PAY)
		packet_log("Payload");
	packet_log("\n");
}

/* Dump FMD ctrl2. The ctrl2 input is in host byte order */
static void spu2_dump_fmd_ctrl2(u64 ctrl2)
{
	packet_log(" FMD CTRL2 %#16llx\n", ctrl2);

	packet_log("  AAD1 offset %llu length %llu bytes\n",
		   ctrl2 & SPU2_AAD1_OFFSET,
		   (ctrl2 & SPU2_AAD1_LEN) >> SPU2_AAD1_LEN_SHIFT);
	packet_log("  AAD2 offset %llu\n",
		   (ctrl2 & SPU2_AAD2_OFFSET) >> SPU2_AAD2_OFFSET_SHIFT);
	packet_log("  Payload offset %llu\n",
		   (ctrl2 & SPU2_PL_OFFSET) >> SPU2_PL_OFFSET_SHIFT);
}

/* Dump FMD ctrl3. The ctrl3 input is in host byte order */
static void spu2_dump_fmd_ctrl3(u64 ctrl3)
{
	packet_log(" FMD CTRL3 %#16llx\n", ctrl3);

	packet_log("  Payload length %llu bytes\n", ctrl3 & SPU2_PL_LEN);
	packet_log("  TLS length %llu bytes\n",
		   (ctrl3 & SPU2_TLS_LEN) >> SPU2_TLS_LEN_SHIFT);
}

static void spu2_dump_fmd(struct SPU2_FMD *fmd)
{
	spu2_dump_fmd_ctrl0(le64_to_cpu(fmd->ctrl0));
	spu2_dump_fmd_ctrl1(le64_to_cpu(fmd->ctrl1));
	spu2_dump_fmd_ctrl2(le64_to_cpu(fmd->ctrl2));
	spu2_dump_fmd_ctrl3(le64_to_cpu(fmd->ctrl3));
}

static void spu2_dump_omd(u8 *omd, u16 hash_key_len, u16 ciph_key_len,
			  u16 hash_iv_len, u16 ciph_iv_len)
{
	u8 *ptr = omd;

	packet_log(" OMD:\n");

	if (hash_key_len) {
		packet_log("  Hash Key Length %u bytes\n", hash_key_len);
		packet_dump("  KEY: ", ptr, hash_key_len);
		ptr += hash_key_len;
	}

	if (ciph_key_len) {
		packet_log("  Cipher Key Length %u bytes\n", ciph_key_len);
		packet_dump("  KEY: ", ptr, ciph_key_len);
		ptr += ciph_key_len;
	}

	if (hash_iv_len) {
		packet_log("  Hash IV Length %u bytes\n", hash_iv_len);
		packet_dump("  hash IV: ", ptr, hash_iv_len);
		ptr += ciph_key_len;
	}

	if (ciph_iv_len) {
		packet_log("  Cipher IV Length %u bytes\n", ciph_iv_len);
		packet_dump("  cipher IV: ", ptr, ciph_iv_len);
	}
}

/* Dump a SPU2 header for debug */
void spu2_dump_msg_hdr(u8 *buf, unsigned int buf_len)
{
	struct SPU2_FMD *fmd = (struct SPU2_FMD *)buf;
	u8 *omd;
	u64 ctrl1;
	u16 hash_key_len;
	u16 ciph_key_len;
	u16 hash_iv_len;
	u16 ciph_iv_len;
	u16 omd_len;

	packet_log("\n");
	packet_log("SPU2 message header %p len: %u\n", buf, buf_len);

	spu2_dump_fmd(fmd);
	omd = (u8 *)(fmd + 1);

	ctrl1 = le64_to_cpu(fmd->ctrl1);
	hash_key_len = (ctrl1 & SPU2_HASH_KEY_LEN) >> SPU2_HASH_KEY_LEN_SHIFT;
	ciph_key_len = (ctrl1 & SPU2_CIPH_KEY_LEN) >> SPU2_CIPH_KEY_LEN_SHIFT;
	hash_iv_len = 0;
	ciph_iv_len = (ctrl1 & SPU2_IV_LEN) >> SPU2_IV_LEN_SHIFT;
	spu2_dump_omd(omd, hash_key_len, ciph_key_len, hash_iv_len,
		      ciph_iv_len);

	/* Double check sanity */
	omd_len = hash_key_len + ciph_key_len + hash_iv_len + ciph_iv_len;
	if (FMD_SIZE + omd_len != buf_len) {
		packet_log
		    (" Packet parsed incorrectly. buf_len %u, sum of MD %zu\n",
		     buf_len, FMD_SIZE + omd_len);
	}
	packet_log("\n");
}

/**
 * spu2_fmd_init() - At setkey time, initialize the fixed meta data for
 * subsequent skcipher requests for this context.
 * @fmd:               Start of FMD field to be written
 * @spu2_type:         Cipher algorithm
 * @spu2_mode:         Cipher mode
 * @cipher_key_len:    Length of cipher key, in bytes
 * @cipher_iv_len:     Length of cipher initialization vector, in bytes
 *
 * Return:  0 (success)
 */
static int spu2_fmd_init(struct SPU2_FMD *fmd,
			 enum spu2_cipher_type spu2_type,
			 enum spu2_cipher_mode spu2_mode,
			 u32 cipher_key_len, u32 cipher_iv_len)
{
	u64 ctrl0;
	u64 ctrl1;
	u64 ctrl2;
	u64 ctrl3;
	u32 aad1_offset;
	u32 aad2_offset;
	u16 aad1_len = 0;
	u64 payload_offset;

	ctrl0 = (spu2_type << SPU2_CIPH_TYPE_SHIFT) |
	    (spu2_mode << SPU2_CIPH_MODE_SHIFT);

	ctrl1 = (cipher_key_len << SPU2_CIPH_KEY_LEN_SHIFT) |
	    ((u64)cipher_iv_len << SPU2_IV_LEN_SHIFT) |
	    ((u64)SPU2_RET_FMD_ONLY << SPU2_RETURN_MD_SHIFT) | SPU2_RETURN_PAY;

	/*
	 * AAD1 offset is from start of FD. FD length is always 0 for this
	 * driver. So AAD1_offset is always 0.
	 */
	aad1_offset = 0;
	aad2_offset = aad1_offset;
	payload_offset = 0;
	ctrl2 = aad1_offset |
	    (aad1_len << SPU2_AAD1_LEN_SHIFT) |
	    (aad2_offset << SPU2_AAD2_OFFSET_SHIFT) |
	    (payload_offset << SPU2_PL_OFFSET_SHIFT);

	ctrl3 = 0;

	fmd->ctrl0 = cpu_to_le64(ctrl0);
	fmd->ctrl1 = cpu_to_le64(ctrl1);
	fmd->ctrl2 = cpu_to_le64(ctrl2);
	fmd->ctrl3 = cpu_to_le64(ctrl3);

	return 0;
}

/**
 * spu2_fmd_ctrl0_write() - Write ctrl0 field in fixed metadata (FMD) field of
 * SPU request packet.
 * @fmd:            Start of FMD field to be written
 * @is_inbound:     true if decrypting. false if encrypting.
 * @auth_first:     true if alg authenticates before encrypting
 * @protocol:       protocol selector
 * @cipher_type:    cipher algorithm
 * @cipher_mode:    cipher mode
 * @auth_type:      authentication type
 * @auth_mode:      authentication mode
 */
static void spu2_fmd_ctrl0_write(struct SPU2_FMD *fmd,
				 bool is_inbound, bool auth_first,
				 enum spu2_proto_sel protocol,
				 enum spu2_cipher_type cipher_type,
				 enum spu2_cipher_mode cipher_mode,
				 enum spu2_hash_type auth_type,
				 enum spu2_hash_mode auth_mode)
{
	u64 ctrl0 = 0;

	if ((cipher_type != SPU2_CIPHER_TYPE_NONE) && !is_inbound)
		ctrl0 |= SPU2_CIPH_ENCRYPT_EN;

	ctrl0 |= ((u64)cipher_type << SPU2_CIPH_TYPE_SHIFT) |
	    ((u64)cipher_mode << SPU2_CIPH_MODE_SHIFT);

	if (protocol)
		ctrl0 |= (u64)protocol << SPU2_PROTO_SEL_SHIFT;

	if (auth_first)
		ctrl0 |= SPU2_HASH_FIRST;

	if (is_inbound && (auth_type != SPU2_HASH_TYPE_NONE))
		ctrl0 |= SPU2_CHK_TAG;

	ctrl0 |= (((u64)auth_type << SPU2_HASH_TYPE_SHIFT) |
		  ((u64)auth_mode << SPU2_HASH_MODE_SHIFT));

	fmd->ctrl0 = cpu_to_le64(ctrl0);
}

/**
 * spu2_fmd_ctrl1_write() - Write ctrl1 field in fixed metadata (FMD) field of
 * SPU request packet.
 * @fmd:            Start of FMD field to be written
 * @is_inbound:     true if decrypting. false if encrypting.
 * @assoc_size:     Length of additional associated data, in bytes
 * @auth_key_len:   Length of authentication key, in bytes
 * @cipher_key_len: Length of cipher key, in bytes
 * @gen_iv:         If true, hw generates IV and returns in response
 * @hash_iv:        IV participates in hash. Used for IPSEC and TLS.
 * @return_iv:      Return IV in output packet before payload
 * @ret_iv_len:     Length of IV returned from SPU, in bytes
 * @ret_iv_offset:  Offset into full IV of start of returned IV
 * @cipher_iv_len:  Length of input cipher IV, in bytes
 * @digest_size:    Length of digest (aka, hash tag or ICV), in bytes
 * @return_payload: Return payload in SPU response
 * @return_md : return metadata in SPU response
 *
 * Packet can have AAD2 w/o AAD1. For algorithms currently supported,
 * associated data goes in AAD2.
 */
static void spu2_fmd_ctrl1_write(struct SPU2_FMD *fmd, bool is_inbound,
				 u64 assoc_size,
				 u64 auth_key_len, u64 cipher_key_len,
				 bool gen_iv, bool hash_iv, bool return_iv,
				 u64 ret_iv_len, u64 ret_iv_offset,
				 u64 cipher_iv_len, u64 digest_size,
				 bool return_payload, bool return_md)
{
	u64 ctrl1 = 0;

	if (is_inbound && digest_size)
		ctrl1 |= SPU2_TAG_LOC;

	if (assoc_size) {
		ctrl1 |= SPU2_HAS_AAD2;
		ctrl1 |= SPU2_RETURN_AAD2;  /* need aad2 for gcm aes esp */
	}

	if (auth_key_len)
		ctrl1 |= ((auth_key_len << SPU2_HASH_KEY_LEN_SHIFT) &
			  SPU2_HASH_KEY_LEN);

	if (cipher_key_len)
		ctrl1 |= ((cipher_key_len << SPU2_CIPH_KEY_LEN_SHIFT) &
			  SPU2_CIPH_KEY_LEN);

	if (gen_iv)
		ctrl1 |= SPU2_GENIV;

	if (hash_iv)
		ctrl1 |= SPU2_HASH_IV;

	if (return_iv) {
		ctrl1 |= SPU2_RET_IV;
		ctrl1 |= ret_iv_len << SPU2_RET_IV_LEN_SHIFT;
		ctrl1 |= ret_iv_offset << SPU2_IV_OFFSET_SHIFT;
	}

	ctrl1 |= ((cipher_iv_len << SPU2_IV_LEN_SHIFT) & SPU2_IV_LEN);

	if (digest_size)
		ctrl1 |= ((digest_size << SPU2_HASH_TAG_LEN_SHIFT) &
			  SPU2_HASH_TAG_LEN);

	/* Let's ask for the output pkt to include FMD, but don't need to
	 * get keys and IVs back in OMD.
	 */
	if (return_md)
		ctrl1 |= ((u64)SPU2_RET_FMD_ONLY << SPU2_RETURN_MD_SHIFT);
	else
		ctrl1 |= ((u64)SPU2_RET_NO_MD << SPU2_RETURN_MD_SHIFT);

	/* Crypto API does not get assoc data back. So no need for AAD2. */

	if (return_payload)
		ctrl1 |= SPU2_RETURN_PAY;

	fmd->ctrl1 = cpu_to_le64(ctrl1);
}

/**
 * spu2_fmd_ctrl2_write() - Set the ctrl2 field in the fixed metadata field of
 * SPU2 header.
 * @fmd:            Start of FMD field to be written
 * @cipher_offset:  Number of bytes from Start of Packet (end of FD field) where
 *                  data to be encrypted or decrypted begins
 * @auth_key_len:   Length of authentication key, in bytes
 * @auth_iv_len:    Length of authentication initialization vector, in bytes
 * @cipher_key_len: Length of cipher key, in bytes
 * @cipher_iv_len:  Length of cipher IV, in bytes
 */
static void spu2_fmd_ctrl2_write(struct SPU2_FMD *fmd, u64 cipher_offset,
				 u64 auth_key_len, u64 auth_iv_len,
				 u64 cipher_key_len, u64 cipher_iv_len)
{
	u64 ctrl2;
	u64 aad1_offset;
	u64 aad2_offset;
	u16 aad1_len = 0;
	u64 payload_offset;

	/* AAD1 offset is from start of FD. FD length always 0. */
	aad1_offset = 0;

	aad2_offset = aad1_offset;
	payload_offset = cipher_offset;
	ctrl2 = aad1_offset |
	    (aad1_len << SPU2_AAD1_LEN_SHIFT) |
	    (aad2_offset << SPU2_AAD2_OFFSET_SHIFT) |
	    (payload_offset << SPU2_PL_OFFSET_SHIFT);

	fmd->ctrl2 = cpu_to_le64(ctrl2);
}

/**
 * spu2_fmd_ctrl3_write() - Set the ctrl3 field in FMD
 * @fmd:          Fixed meta data. First field in SPU2 msg header.
 * @payload_len:  Length of payload, in bytes
 */
static void spu2_fmd_ctrl3_write(struct SPU2_FMD *fmd, u64 payload_len)
{
	u64 ctrl3;

	ctrl3 = payload_len & SPU2_PL_LEN;

	fmd->ctrl3 = cpu_to_le64(ctrl3);
}

/**
 * spu2_ctx_max_payload() - Determine the maximum length of the payload for a
 * SPU message for a given cipher and hash alg context.
 * @cipher_alg:		The cipher algorithm
 * @cipher_mode:	The cipher mode
 * @blocksize:		The size of a block of data for this algo
 *
 * For SPU2, the hardware generally ignores the PayloadLen field in ctrl3 of
 * FMD and just keeps computing until it receives a DMA descriptor with the EOF
 * flag set. So we consider the max payload to be infinite. AES CCM is an
 * exception.
 *
 * Return: Max payload length in bytes
 */
u32 spu2_ctx_max_payload(enum spu_cipher_alg cipher_alg,
			 enum spu_cipher_mode cipher_mode,
			 unsigned int blocksize)
{
	if ((cipher_alg == CIPHER_ALG_AES) &&
	    (cipher_mode == CIPHER_MODE_CCM)) {
		u32 excess = SPU2_MAX_PAYLOAD % blocksize;

		return SPU2_MAX_PAYLOAD - excess;
	} else {
		return SPU_MAX_PAYLOAD_INF;
	}
}

/**
 * spu2_payload_length() -  Given a SPU2 message header, extract the payload
 * length.
 * @spu_hdr:  Start of SPU message header (FMD)
 *
 * Return: payload length, in bytes
 */
u32 spu2_payload_length(u8 *spu_hdr)
{
	struct SPU2_FMD *fmd = (struct SPU2_FMD *)spu_hdr;
	u32 pl_len;
	u64 ctrl3;

	ctrl3 = le64_to_cpu(fmd->ctrl3);
	pl_len = ctrl3 & SPU2_PL_LEN;

	return pl_len;
}

/**
 * spu2_response_hdr_len() - Determine the expected length of a SPU response
 * header.
 * @auth_key_len:  Length of authentication key, in bytes
 * @enc_key_len:   Length of encryption key, in bytes
 * @is_hash:       Unused
 *
 * For SPU2, includes just FMD. OMD is never requested.
 *
 * Return: Length of FMD, in bytes
 */
u16 spu2_response_hdr_len(u16 auth_key_len, u16 enc_key_len, bool is_hash)
{
	return FMD_SIZE;
}

/**
 * spu2_hash_pad_len() - Calculate the length of hash padding required to extend
 * data to a full block size.
 * @hash_alg:        hash algorithm
 * @hash_mode:       hash mode
 * @chunksize:       length of data, in bytes
 * @hash_block_size: size of a hash block, in bytes
 *
 * SPU2 hardware does all hash padding
 *
 * Return:  length of hash pad in bytes
 */
u16 spu2_hash_pad_len(enum hash_alg hash_alg, enum hash_mode hash_mode,
		      u32 chunksize, u16 hash_block_size)
{
	return 0;
}

/**
 * spu2_gcm_ccm_pad_len() -  Determine the length of GCM/CCM padding for either
 * the AAD field or the data.
 * @cipher_mode:  Unused
 * @data_size:    Unused
 *
 * Return:  0. Unlike SPU-M, SPU2 hardware does any GCM/CCM padding required.
 */
u32 spu2_gcm_ccm_pad_len(enum spu_cipher_mode cipher_mode,
			 unsigned int data_size)
{
	return 0;
}

/**
 * spu2_assoc_resp_len() - Determine the size of the AAD2 buffer needed to catch
 * associated data in a SPU2 output packet.
 * @cipher_mode:   cipher mode
 * @assoc_len:     length of additional associated data, in bytes
 * @iv_len:        length of initialization vector, in bytes
 * @is_encrypt:    true if encrypting. false if decrypt.
 *
 * Return: Length of buffer to catch associated data in response
 */
u32 spu2_assoc_resp_len(enum spu_cipher_mode cipher_mode,
			unsigned int assoc_len, unsigned int iv_len,
			bool is_encrypt)
{
	u32 resp_len = assoc_len;

	if (is_encrypt)
		/* gcm aes esp has to write 8-byte IV in response */
		resp_len += iv_len;
	return resp_len;
}

/**
 * spu2_aead_ivlen() - Calculate the length of the AEAD IV to be included
 * in a SPU request after the AAD and before the payload.
 * @cipher_mode:  cipher mode
 * @iv_len:   initialization vector length in bytes
 *
 * For SPU2, AEAD IV is included in OMD and does not need to be repeated
 * prior to the payload.
 *
 * Return: Length of AEAD IV in bytes
 */
u8 spu2_aead_ivlen(enum spu_cipher_mode cipher_mode, u16 iv_len)
{
	return 0;
}

/**
 * spu2_hash_type() - Determine the type of hash operation.
 * @src_sent:  The number of bytes in the current request that have already
 *             been sent to the SPU to be hashed.
 *
 * SPU2 always does a FULL hash operation
 */
enum hash_type spu2_hash_type(u32 src_sent)
{
	return HASH_TYPE_FULL;
}

/**
 * spu2_digest_size() - Determine the size of a hash digest to expect the SPU to
 * return.
 * @alg_digest_size: Number of bytes in the final digest for the given algo
 * @alg:             The hash algorithm
 * @htype:           Type of hash operation (init, update, full, etc)
 *
 */
u32 spu2_digest_size(u32 alg_digest_size, enum hash_alg alg,
		     enum hash_type htype)
{
	return alg_digest_size;
}

/**
 * spu2_create_request() - Build a SPU2 request message header, includint FMD and
 * OMD.
 * @spu_hdr: Start of buffer where SPU request header is to be written
 * @req_opts: SPU request message options
 * @cipher_parms: Parameters related to cipher algorithm
 * @hash_parms:   Parameters related to hash algorithm
 * @aead_parms:   Parameters related to AEAD operation
 * @data_size:    Length of data to be encrypted or authenticated. If AEAD, does
 *		  not include length of AAD.
 *
 * Construct the message starting at spu_hdr. Caller should allocate this buffer
 * in DMA-able memory at least SPU_HEADER_ALLOC_LEN bytes long.
 *
 * Return: the length of the SPU header in bytes. 0 if an error occurs.
 */
u32 spu2_create_request(u8 *spu_hdr,
			struct spu_request_opts *req_opts,
			struct spu_cipher_parms *cipher_parms,
			struct spu_hash_parms *hash_parms,
			struct spu_aead_parms *aead_parms,
			unsigned int data_size)
{
	struct SPU2_FMD *fmd;
	u8 *ptr;
	unsigned int buf_len;
	int err;
	enum spu2_cipher_type spu2_ciph_type = SPU2_CIPHER_TYPE_NONE;
	enum spu2_cipher_mode spu2_ciph_mode;
	enum spu2_hash_type spu2_auth_type = SPU2_HASH_TYPE_NONE;
	enum spu2_hash_mode spu2_auth_mode;
	bool return_md = true;
	enum spu2_proto_sel proto = SPU2_PROTO_RESV;

	/* size of the payload */
	unsigned int payload_len =
	    hash_parms->prebuf_len + data_size + hash_parms->pad_len -
	    ((req_opts->is_aead && req_opts->is_inbound) ?
	     hash_parms->digestsize : 0);

	/* offset of prebuf or data from start of AAD2 */
	unsigned int cipher_offset = aead_parms->assoc_size +
			aead_parms->aad_pad_len + aead_parms->iv_len;

	/* total size of the data following OMD (without STAT word padding) */
	unsigned int real_db_size = spu_real_db_size(aead_parms->assoc_size,
						 aead_parms->iv_len,
						 hash_parms->prebuf_len,
						 data_size,
						 aead_parms->aad_pad_len,
						 aead_parms->data_pad_len,
						 hash_parms->pad_len);
	unsigned int assoc_size = aead_parms->assoc_size;

	if (req_opts->is_aead &&
	    (cipher_parms->alg == CIPHER_ALG_AES) &&
	    (cipher_parms->mode == CIPHER_MODE_GCM))
		/*
		 * On SPU 2, aes gcm cipher first on encrypt, auth first on
		 * decrypt
		 */
		req_opts->auth_first = req_opts->is_inbound;

	/* and do opposite for ccm (auth 1st on encrypt) */
	if (req_opts->is_aead &&
	    (cipher_parms->alg == CIPHER_ALG_AES) &&
	    (cipher_parms->mode == CIPHER_MODE_CCM))
		req_opts->auth_first = !req_opts->is_inbound;

	flow_log("%s()\n", __func__);
	flow_log("  in:%u authFirst:%u\n",
		 req_opts->is_inbound, req_opts->auth_first);
	flow_log("  cipher alg:%u mode:%u type %u\n", cipher_parms->alg,
		 cipher_parms->mode, cipher_parms->type);
	flow_log("  is_esp: %s\n", req_opts->is_esp ? "yes" : "no");
	flow_log("    key: %d\n", cipher_parms->key_len);
	flow_dump("    key: ", cipher_parms->key_buf, cipher_parms->key_len);
	flow_log("    iv: %d\n", cipher_parms->iv_len);
	flow_dump("    iv: ", cipher_parms->iv_buf, cipher_parms->iv_len);
	flow_log("  auth alg:%u mode:%u type %u\n",
		 hash_parms->alg, hash_parms->mode, hash_parms->type);
	flow_log("  digestsize: %u\n", hash_parms->digestsize);
	flow_log("  authkey: %d\n", hash_parms->key_len);
	flow_dump("  authkey: ", hash_parms->key_buf, hash_parms->key_len);
	flow_log("  assoc_size:%u\n", assoc_size);
	flow_log("  prebuf_len:%u\n", hash_parms->prebuf_len);
	flow_log("  data_size:%u\n", data_size);
	flow_log("  hash_pad_len:%u\n", hash_parms->pad_len);
	flow_log("  real_db_size:%u\n", real_db_size);
	flow_log("  cipher_offset:%u payload_len:%u\n",
		 cipher_offset, payload_len);
	flow_log("  aead_iv: %u\n", aead_parms->iv_len);

	/* Convert to spu2 values for cipher alg, hash alg */
	err = spu2_cipher_xlate(cipher_parms->alg, cipher_parms->mode,
				cipher_parms->type,
				&spu2_ciph_type, &spu2_ciph_mode);

	/* If we are doing GCM hashing only - either via rfc4543 transform
	 * or because we happen to do GCM with AAD only and no payload - we
	 * need to configure hardware to use hash key rather than cipher key
	 * and put data into payload.  This is because unlike SPU-M, running
	 * GCM cipher with 0 size payload is not permitted.
	 */
	if ((req_opts->is_rfc4543) ||
	    ((spu2_ciph_mode == SPU2_CIPHER_MODE_GCM) &&
	    (payload_len == 0))) {
		/* Use hashing (only) and set up hash key */
		spu2_ciph_type = SPU2_CIPHER_TYPE_NONE;
		hash_parms->key_len = cipher_parms->key_len;
		memcpy(hash_parms->key_buf, cipher_parms->key_buf,
		       cipher_parms->key_len);
		cipher_parms->key_len = 0;

		if (req_opts->is_rfc4543)
			payload_len += assoc_size;
		else
			payload_len = assoc_size;
		cipher_offset = 0;
		assoc_size = 0;
	}

	if (err)
		return 0;

	flow_log("spu2 cipher type %s, cipher mode %s\n",
		 spu2_ciph_type_name(spu2_ciph_type),
		 spu2_ciph_mode_name(spu2_ciph_mode));

	err = spu2_hash_xlate(hash_parms->alg, hash_parms->mode,
			      hash_parms->type,
			      cipher_parms->type,
			      &spu2_auth_type, &spu2_auth_mode);
	if (err)
		return 0;

	flow_log("spu2 hash type %s, hash mode %s\n",
		 spu2_hash_type_name(spu2_auth_type),
		 spu2_hash_mode_name(spu2_auth_mode));

	fmd = (struct SPU2_FMD *)spu_hdr;

	spu2_fmd_ctrl0_write(fmd, req_opts->is_inbound, req_opts->auth_first,
			     proto, spu2_ciph_type, spu2_ciph_mode,
			     spu2_auth_type, spu2_auth_mode);

	spu2_fmd_ctrl1_write(fmd, req_opts->is_inbound, assoc_size,
			     hash_parms->key_len, cipher_parms->key_len,
			     false, false,
			     aead_parms->return_iv, aead_parms->ret_iv_len,
			     aead_parms->ret_iv_off,
			     cipher_parms->iv_len, hash_parms->digestsize,
			     !req_opts->bd_suppress, return_md);

	spu2_fmd_ctrl2_write(fmd, cipher_offset, hash_parms->key_len, 0,
			     cipher_parms->key_len, cipher_parms->iv_len);

	spu2_fmd_ctrl3_write(fmd, payload_len);

	ptr = (u8 *)(fmd + 1);
	buf_len = sizeof(struct SPU2_FMD);

	/* Write OMD */
	if (hash_parms->key_len) {
		memcpy(ptr, hash_parms->key_buf, hash_parms->key_len);
		ptr += hash_parms->key_len;
		buf_len += hash_parms->key_len;
	}
	if (cipher_parms->key_len) {
		memcpy(ptr, cipher_parms->key_buf, cipher_parms->key_len);
		ptr += cipher_parms->key_len;
		buf_len += cipher_parms->key_len;
	}
	if (cipher_parms->iv_len) {
		memcpy(ptr, cipher_parms->iv_buf, cipher_parms->iv_len);
		ptr += cipher_parms->iv_len;
		buf_len += cipher_parms->iv_len;
	}

	packet_dump("  SPU request header: ", spu_hdr, buf_len);

	return buf_len;
}

/**
 * spu2_cipher_req_init() - Build an skcipher SPU2 request message header,
 * including FMD and OMD.
 * @spu_hdr:       Location of start of SPU request (FMD field)
 * @cipher_parms:  Parameters describing cipher request
 *
 * Called at setkey time to initialize a msg header that can be reused for all
 * subsequent skcipher requests. Construct the message starting at spu_hdr.
 * Caller should allocate this buffer in DMA-able memory at least
 * SPU_HEADER_ALLOC_LEN bytes long.
 *
 * Return: the total length of the SPU header (FMD and OMD) in bytes. 0 if an
 * error occurs.
 */
u16 spu2_cipher_req_init(u8 *spu_hdr, struct spu_cipher_parms *cipher_parms)
{
	struct SPU2_FMD *fmd;
	u8 *omd;
	enum spu2_cipher_type spu2_type = SPU2_CIPHER_TYPE_NONE;
	enum spu2_cipher_mode spu2_mode;
	int err;

	flow_log("%s()\n", __func__);
	flow_log("  cipher alg:%u mode:%u type %u\n", cipher_parms->alg,
		 cipher_parms->mode, cipher_parms->type);
	flow_log("  cipher_iv_len: %u\n", cipher_parms->iv_len);
	flow_log("    key: %d\n", cipher_parms->key_len);
	flow_dump("    key: ", cipher_parms->key_buf, cipher_parms->key_len);

	/* Convert to spu2 values */
	err = spu2_cipher_xlate(cipher_parms->alg, cipher_parms->mode,
				cipher_parms->type, &spu2_type, &spu2_mode);
	if (err)
		return 0;

	flow_log("spu2 cipher type %s, cipher mode %s\n",
		 spu2_ciph_type_name(spu2_type),
		 spu2_ciph_mode_name(spu2_mode));

	/* Construct the FMD header */
	fmd = (struct SPU2_FMD *)spu_hdr;
	err = spu2_fmd_init(fmd, spu2_type, spu2_mode, cipher_parms->key_len,
			    cipher_parms->iv_len);
	if (err)
		return 0;

	/* Write cipher key to OMD */
	omd = (u8 *)(fmd + 1);
	if (cipher_parms->key_buf && cipher_parms->key_len)
		memcpy(omd, cipher_parms->key_buf, cipher_parms->key_len);

	packet_dump("  SPU request header: ", spu_hdr,
		    FMD_SIZE + cipher_parms->key_len + cipher_parms->iv_len);

	return FMD_SIZE + cipher_parms->key_len + cipher_parms->iv_len;
}

/**
 * spu2_cipher_req_finish() - Finish building a SPU request message header for a
 * block cipher request.
 * @spu_hdr:         Start of the request message header (MH field)
 * @spu_req_hdr_len: Length in bytes of the SPU request header
 * @is_inbound:      0 encrypt, 1 decrypt
 * @cipher_parms:    Parameters describing cipher operation to be performed
 * @data_size:       Length of the data in the BD field
 *
 * Assumes much of the header was already filled in at setkey() time in
 * spu_cipher_req_init().
 * spu_cipher_req_init() fills in the encryption key.
 */
void spu2_cipher_req_finish(u8 *spu_hdr,
			    u16 spu_req_hdr_len,
			    unsigned int is_inbound,
			    struct spu_cipher_parms *cipher_parms,
			    unsigned int data_size)
{
	struct SPU2_FMD *fmd;
	u8 *omd;		/* start of optional metadata */
	u64 ctrl0;
	u64 ctrl3;

	flow_log("%s()\n", __func__);
	flow_log(" in: %u\n", is_inbound);
	flow_log(" cipher alg: %u, cipher_type: %u\n", cipher_parms->alg,
		 cipher_parms->type);
	flow_log(" iv len: %d\n", cipher_parms->iv_len);
	flow_dump("    iv: ", cipher_parms->iv_buf, cipher_parms->iv_len);
	flow_log(" data_size: %u\n", data_size);

	fmd = (struct SPU2_FMD *)spu_hdr;
	omd = (u8 *)(fmd + 1);

	/*
	 * FMD ctrl0 was initialized at setkey time. update it to indicate
	 * whether we are encrypting or decrypting.
	 */
	ctrl0 = le64_to_cpu(fmd->ctrl0);
	if (is_inbound)
		ctrl0 &= ~SPU2_CIPH_ENCRYPT_EN;	/* decrypt */
	else
		ctrl0 |= SPU2_CIPH_ENCRYPT_EN;	/* encrypt */
	fmd->ctrl0 = cpu_to_le64(ctrl0);

	if (cipher_parms->alg && cipher_parms->iv_buf && cipher_parms->iv_len) {
		/* cipher iv provided so put it in here */
		memcpy(omd + cipher_parms->key_len, cipher_parms->iv_buf,
		       cipher_parms->iv_len);
	}

	ctrl3 = le64_to_cpu(fmd->ctrl3);
	data_size &= SPU2_PL_LEN;
	ctrl3 |= data_size;
	fmd->ctrl3 = cpu_to_le64(ctrl3);

	packet_dump("  SPU request header: ", spu_hdr, spu_req_hdr_len);
}

/**
 * spu2_request_pad() - Create pad bytes at the end of the data.
 * @pad_start:      Start of buffer where pad bytes are to be written
 * @gcm_padding:    Length of GCM padding, in bytes
 * @hash_pad_len:   Number of bytes of padding extend data to full block
 * @auth_alg:       Authentication algorithm
 * @auth_mode:      Authentication mode
 * @total_sent:     Length inserted at end of hash pad
 * @status_padding: Number of bytes of padding to align STATUS word
 *
 * There may be three forms of pad:
 *  1. GCM pad - for GCM mode ciphers, pad to 16-byte alignment
 *  2. hash pad - pad to a block length, with 0x80 data terminator and
 *                size at the end
 *  3. STAT pad - to ensure the STAT field is 4-byte aligned
 */
void spu2_request_pad(u8 *pad_start, u32 gcm_padding, u32 hash_pad_len,
		      enum hash_alg auth_alg, enum hash_mode auth_mode,
		      unsigned int total_sent, u32 status_padding)
{
	u8 *ptr = pad_start;

	/* fix data alignent for GCM */
	if (gcm_padding > 0) {
		flow_log("  GCM: padding to 16 byte alignment: %u bytes\n",
			 gcm_padding);
		memset(ptr, 0, gcm_padding);
		ptr += gcm_padding;
	}

	if (hash_pad_len > 0) {
		/* clear the padding section */
		memset(ptr, 0, hash_pad_len);

		/* terminate the data */
		*ptr = 0x80;
		ptr += (hash_pad_len - sizeof(u64));

		/* add the size at the end as required per alg */
		if (auth_alg == HASH_ALG_MD5)
			*(__le64 *)ptr = cpu_to_le64(total_sent * 8ull);
		else		/* SHA1, SHA2-224, SHA2-256 */
			*(__be64 *)ptr = cpu_to_be64(total_sent * 8ull);
		ptr += sizeof(u64);
	}

	/* pad to a 4byte alignment for STAT */
	if (status_padding > 0) {
		flow_log("  STAT: padding to 4 byte alignment: %u bytes\n",
			 status_padding);

		memset(ptr, 0, status_padding);
		ptr += status_padding;
	}
}

/**
 * spu2_xts_tweak_in_payload() - Indicate that SPU2 does NOT place the XTS
 * tweak field in the packet payload (it uses IV instead)
 *
 * Return: 0
 */
u8 spu2_xts_tweak_in_payload(void)
{
	return 0;
}

/**
 * spu2_tx_status_len() - Return the length of the STATUS field in a SPU
 * response message.
 *
 * Return: Length of STATUS field in bytes.
 */
u8 spu2_tx_status_len(void)
{
	return SPU2_TX_STATUS_LEN;
}

/**
 * spu2_rx_status_len() - Return the length of the STATUS field in a SPU
 * response message.
 *
 * Return: Length of STATUS field in bytes.
 */
u8 spu2_rx_status_len(void)
{
	return SPU2_RX_STATUS_LEN;
}

/**
 * spu2_status_process() - Process the status from a SPU response message.
 * @statp:  start of STATUS word
 *
 * Return:  0 - if status is good and response should be processed
 *         !0 - status indicates an error and response is invalid
 */
int spu2_status_process(u8 *statp)
{
	/* SPU2 status is 2 bytes by default - SPU_RX_STATUS_LEN */
	u16 status = le16_to_cpu(*(__le16 *)statp);

	if (status == 0)
		return 0;

	flow_log("rx status is %#x\n", status);
	if (status == SPU2_INVALID_ICV)
		return SPU_INVALID_ICV;

	return -EBADMSG;
}

/**
 * spu2_ccm_update_iv() - Update the IV as per the requirements for CCM mode.
 *
 * @digestsize:		Digest size of this request
 * @cipher_parms:	(pointer to) cipher parmaeters, includes IV buf & IV len
 * @assoclen:		Length of AAD data
 * @chunksize:		length of input data to be sent in this req
 * @is_encrypt:		true if this is an output/encrypt operation
 * @is_esp:		true if this is an ESP / RFC4309 operation
 *
 */
void spu2_ccm_update_iv(unsigned int digestsize,
			struct spu_cipher_parms *cipher_parms,
			unsigned int assoclen, unsigned int chunksize,
			bool is_encrypt, bool is_esp)
{
	int L;  /* size of length field, in bytes */

	/*
	 * In RFC4309 mode, L is fixed at 4 bytes; otherwise, IV from
	 * testmgr contains (L-1) in bottom 3 bits of first byte,
	 * per RFC 3610.
	 */
	if (is_esp)
		L = CCM_ESP_L_VALUE;
	else
		L = ((cipher_parms->iv_buf[0] & CCM_B0_L_PRIME) >>
		      CCM_B0_L_PRIME_SHIFT) + 1;

	/* SPU2 doesn't want these length bytes nor the first byte... */
	cipher_parms->iv_len -= (1 + L);
	memmove(cipher_parms->iv_buf, &cipher_parms->iv_buf[1],
		cipher_parms->iv_len);
}

/**
 * spu2_wordalign_padlen() - SPU2 does not require padding.
 * @data_size: length of data field in bytes
 *
 * Return: length of status field padding, in bytes (always 0 on SPU2)
 */
u32 spu2_wordalign_padlen(u32 data_size)
{
	return 0;
}