-
Notifications
You must be signed in to change notification settings - Fork 53.3k
/
safexcel_cipher.c
3611 lines (3178 loc) · 103 KB
/
safexcel_cipher.c
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
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2017 Marvell
*
* Antoine Tenart <antoine.tenart@free-electrons.com>
*/
#include <asm/unaligned.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
#include <crypto/aead.h>
#include <crypto/aes.h>
#include <crypto/authenc.h>
#include <crypto/chacha.h>
#include <crypto/ctr.h>
#include <crypto/internal/des.h>
#include <crypto/gcm.h>
#include <crypto/ghash.h>
#include <crypto/poly1305.h>
#include <crypto/sha1.h>
#include <crypto/sha2.h>
#include <crypto/sm3.h>
#include <crypto/sm4.h>
#include <crypto/xts.h>
#include <crypto/skcipher.h>
#include <crypto/internal/aead.h>
#include <crypto/internal/skcipher.h>
#include "safexcel.h"
enum safexcel_cipher_direction {
SAFEXCEL_ENCRYPT,
SAFEXCEL_DECRYPT,
};
enum safexcel_cipher_alg {
SAFEXCEL_DES,
SAFEXCEL_3DES,
SAFEXCEL_AES,
SAFEXCEL_CHACHA20,
SAFEXCEL_SM4,
};
struct safexcel_cipher_ctx {
struct safexcel_context base;
struct safexcel_crypto_priv *priv;
u32 mode;
enum safexcel_cipher_alg alg;
u8 aead; /* !=0=AEAD, 2=IPSec ESP AEAD, 3=IPsec ESP GMAC */
u8 xcm; /* 0=authenc, 1=GCM, 2 reserved for CCM */
u8 aadskip;
u8 blocksz;
u32 ivmask;
u32 ctrinit;
__le32 key[16];
u32 nonce;
unsigned int key_len, xts;
/* All the below is AEAD specific */
u32 hash_alg;
u32 state_sz;
struct crypto_aead *fback;
};
struct safexcel_cipher_req {
enum safexcel_cipher_direction direction;
/* Number of result descriptors associated to the request */
unsigned int rdescs;
bool needs_inv;
int nr_src, nr_dst;
};
static int safexcel_skcipher_iv(struct safexcel_cipher_ctx *ctx, u8 *iv,
struct safexcel_command_desc *cdesc)
{
if (ctx->mode == CONTEXT_CONTROL_CRYPTO_MODE_CTR_LOAD) {
cdesc->control_data.options |= EIP197_OPTION_4_TOKEN_IV_CMD;
/* 32 bit nonce */
cdesc->control_data.token[0] = ctx->nonce;
/* 64 bit IV part */
memcpy(&cdesc->control_data.token[1], iv, 8);
/* 32 bit counter, start at 0 or 1 (big endian!) */
cdesc->control_data.token[3] =
(__force u32)cpu_to_be32(ctx->ctrinit);
return 4;
}
if (ctx->alg == SAFEXCEL_CHACHA20) {
cdesc->control_data.options |= EIP197_OPTION_4_TOKEN_IV_CMD;
/* 96 bit nonce part */
memcpy(&cdesc->control_data.token[0], &iv[4], 12);
/* 32 bit counter */
cdesc->control_data.token[3] = *(u32 *)iv;
return 4;
}
cdesc->control_data.options |= ctx->ivmask;
memcpy(cdesc->control_data.token, iv, ctx->blocksz);
return ctx->blocksz / sizeof(u32);
}
static void safexcel_skcipher_token(struct safexcel_cipher_ctx *ctx, u8 *iv,
struct safexcel_command_desc *cdesc,
struct safexcel_token *atoken,
u32 length)
{
struct safexcel_token *token;
int ivlen;
ivlen = safexcel_skcipher_iv(ctx, iv, cdesc);
if (ivlen == 4) {
/* No space in cdesc, instruction moves to atoken */
cdesc->additional_cdata_size = 1;
token = atoken;
} else {
/* Everything fits in cdesc */
token = (struct safexcel_token *)(cdesc->control_data.token + 2);
/* Need to pad with NOP */
eip197_noop_token(&token[1]);
}
token->opcode = EIP197_TOKEN_OPCODE_DIRECTION;
token->packet_length = length;
token->stat = EIP197_TOKEN_STAT_LAST_PACKET |
EIP197_TOKEN_STAT_LAST_HASH;
token->instructions = EIP197_TOKEN_INS_LAST |
EIP197_TOKEN_INS_TYPE_CRYPTO |
EIP197_TOKEN_INS_TYPE_OUTPUT;
}
static void safexcel_aead_iv(struct safexcel_cipher_ctx *ctx, u8 *iv,
struct safexcel_command_desc *cdesc)
{
if (ctx->mode == CONTEXT_CONTROL_CRYPTO_MODE_CTR_LOAD ||
ctx->aead & EIP197_AEAD_TYPE_IPSEC_ESP) { /* _ESP and _ESP_GMAC */
/* 32 bit nonce */
cdesc->control_data.token[0] = ctx->nonce;
/* 64 bit IV part */
memcpy(&cdesc->control_data.token[1], iv, 8);
/* 32 bit counter, start at 0 or 1 (big endian!) */
cdesc->control_data.token[3] =
(__force u32)cpu_to_be32(ctx->ctrinit);
return;
}
if (ctx->xcm == EIP197_XCM_MODE_GCM || ctx->alg == SAFEXCEL_CHACHA20) {
/* 96 bit IV part */
memcpy(&cdesc->control_data.token[0], iv, 12);
/* 32 bit counter, start at 0 or 1 (big endian!) */
cdesc->control_data.token[3] =
(__force u32)cpu_to_be32(ctx->ctrinit);
return;
}
/* CBC */
memcpy(cdesc->control_data.token, iv, ctx->blocksz);
}
static void safexcel_aead_token(struct safexcel_cipher_ctx *ctx, u8 *iv,
struct safexcel_command_desc *cdesc,
struct safexcel_token *atoken,
enum safexcel_cipher_direction direction,
u32 cryptlen, u32 assoclen, u32 digestsize)
{
struct safexcel_token *aadref;
int atoksize = 2; /* Start with minimum size */
int assocadj = assoclen - ctx->aadskip, aadalign;
/* Always 4 dwords of embedded IV for AEAD modes */
cdesc->control_data.options |= EIP197_OPTION_4_TOKEN_IV_CMD;
if (direction == SAFEXCEL_DECRYPT)
cryptlen -= digestsize;
if (unlikely(ctx->xcm == EIP197_XCM_MODE_CCM)) {
/* Construct IV block B0 for the CBC-MAC */
u8 *final_iv = (u8 *)cdesc->control_data.token;
u8 *cbcmaciv = (u8 *)&atoken[1];
__le32 *aadlen = (__le32 *)&atoken[5];
if (ctx->aead == EIP197_AEAD_TYPE_IPSEC_ESP) {
/* Length + nonce */
cdesc->control_data.token[0] = ctx->nonce;
/* Fixup flags byte */
*(__le32 *)cbcmaciv =
cpu_to_le32(ctx->nonce |
((assocadj > 0) << 6) |
((digestsize - 2) << 2));
/* 64 bit IV part */
memcpy(&cdesc->control_data.token[1], iv, 8);
memcpy(cbcmaciv + 4, iv, 8);
/* Start counter at 0 */
cdesc->control_data.token[3] = 0;
/* Message length */
*(__be32 *)(cbcmaciv + 12) = cpu_to_be32(cryptlen);
} else {
/* Variable length IV part */
memcpy(final_iv, iv, 15 - iv[0]);
memcpy(cbcmaciv, iv, 15 - iv[0]);
/* Start variable length counter at 0 */
memset(final_iv + 15 - iv[0], 0, iv[0] + 1);
memset(cbcmaciv + 15 - iv[0], 0, iv[0] - 1);
/* fixup flags byte */
cbcmaciv[0] |= ((assocadj > 0) << 6) |
((digestsize - 2) << 2);
/* insert lower 2 bytes of message length */
cbcmaciv[14] = cryptlen >> 8;
cbcmaciv[15] = cryptlen & 255;
}
atoken->opcode = EIP197_TOKEN_OPCODE_INSERT;
atoken->packet_length = AES_BLOCK_SIZE +
((assocadj > 0) << 1);
atoken->stat = 0;
atoken->instructions = EIP197_TOKEN_INS_ORIGIN_TOKEN |
EIP197_TOKEN_INS_TYPE_HASH;
if (likely(assocadj)) {
*aadlen = cpu_to_le32((assocadj >> 8) |
(assocadj & 255) << 8);
atoken += 6;
atoksize += 7;
} else {
atoken += 5;
atoksize += 6;
}
/* Process AAD data */
aadref = atoken;
atoken->opcode = EIP197_TOKEN_OPCODE_DIRECTION;
atoken->packet_length = assocadj;
atoken->stat = 0;
atoken->instructions = EIP197_TOKEN_INS_TYPE_HASH;
atoken++;
/* For CCM only, align AAD data towards hash engine */
atoken->opcode = EIP197_TOKEN_OPCODE_INSERT;
aadalign = (assocadj + 2) & 15;
atoken->packet_length = assocadj && aadalign ?
16 - aadalign :
0;
if (likely(cryptlen)) {
atoken->stat = 0;
atoken->instructions = EIP197_TOKEN_INS_TYPE_HASH;
} else {
atoken->stat = EIP197_TOKEN_STAT_LAST_HASH;
atoken->instructions = EIP197_TOKEN_INS_LAST |
EIP197_TOKEN_INS_TYPE_HASH;
}
} else {
safexcel_aead_iv(ctx, iv, cdesc);
/* Process AAD data */
aadref = atoken;
atoken->opcode = EIP197_TOKEN_OPCODE_DIRECTION;
atoken->packet_length = assocadj;
atoken->stat = EIP197_TOKEN_STAT_LAST_HASH;
atoken->instructions = EIP197_TOKEN_INS_LAST |
EIP197_TOKEN_INS_TYPE_HASH;
}
atoken++;
if (ctx->aead == EIP197_AEAD_TYPE_IPSEC_ESP) {
/* For ESP mode (and not GMAC), skip over the IV */
atoken->opcode = EIP197_TOKEN_OPCODE_DIRECTION;
atoken->packet_length = EIP197_AEAD_IPSEC_IV_SIZE;
atoken->stat = 0;
atoken->instructions = 0;
atoken++;
atoksize++;
} else if (unlikely(ctx->alg == SAFEXCEL_CHACHA20 &&
direction == SAFEXCEL_DECRYPT)) {
/* Poly-chacha decryption needs a dummy NOP here ... */
atoken->opcode = EIP197_TOKEN_OPCODE_INSERT;
atoken->packet_length = 16; /* According to Op Manual */
atoken->stat = 0;
atoken->instructions = 0;
atoken++;
atoksize++;
}
if (ctx->xcm) {
/* For GCM and CCM, obtain enc(Y0) */
atoken->opcode = EIP197_TOKEN_OPCODE_INSERT_REMRES;
atoken->packet_length = 0;
atoken->stat = 0;
atoken->instructions = AES_BLOCK_SIZE;
atoken++;
atoken->opcode = EIP197_TOKEN_OPCODE_INSERT;
atoken->packet_length = AES_BLOCK_SIZE;
atoken->stat = 0;
atoken->instructions = EIP197_TOKEN_INS_TYPE_OUTPUT |
EIP197_TOKEN_INS_TYPE_CRYPTO;
atoken++;
atoksize += 2;
}
if (likely(cryptlen || ctx->alg == SAFEXCEL_CHACHA20)) {
/* Fixup stat field for AAD direction instruction */
aadref->stat = 0;
/* Process crypto data */
atoken->opcode = EIP197_TOKEN_OPCODE_DIRECTION;
atoken->packet_length = cryptlen;
if (unlikely(ctx->aead == EIP197_AEAD_TYPE_IPSEC_ESP_GMAC)) {
/* Fixup instruction field for AAD dir instruction */
aadref->instructions = EIP197_TOKEN_INS_TYPE_HASH;
/* Do not send to crypt engine in case of GMAC */
atoken->instructions = EIP197_TOKEN_INS_LAST |
EIP197_TOKEN_INS_TYPE_HASH |
EIP197_TOKEN_INS_TYPE_OUTPUT;
} else {
atoken->instructions = EIP197_TOKEN_INS_LAST |
EIP197_TOKEN_INS_TYPE_CRYPTO |
EIP197_TOKEN_INS_TYPE_HASH |
EIP197_TOKEN_INS_TYPE_OUTPUT;
}
cryptlen &= 15;
if (unlikely(ctx->xcm == EIP197_XCM_MODE_CCM && cryptlen)) {
atoken->stat = 0;
/* For CCM only, pad crypto data to the hash engine */
atoken++;
atoksize++;
atoken->opcode = EIP197_TOKEN_OPCODE_INSERT;
atoken->packet_length = 16 - cryptlen;
atoken->stat = EIP197_TOKEN_STAT_LAST_HASH;
atoken->instructions = EIP197_TOKEN_INS_TYPE_HASH;
} else {
atoken->stat = EIP197_TOKEN_STAT_LAST_HASH;
}
atoken++;
atoksize++;
}
if (direction == SAFEXCEL_ENCRYPT) {
/* Append ICV */
atoken->opcode = EIP197_TOKEN_OPCODE_INSERT;
atoken->packet_length = digestsize;
atoken->stat = EIP197_TOKEN_STAT_LAST_HASH |
EIP197_TOKEN_STAT_LAST_PACKET;
atoken->instructions = EIP197_TOKEN_INS_TYPE_OUTPUT |
EIP197_TOKEN_INS_INSERT_HASH_DIGEST;
} else {
/* Extract ICV */
atoken->opcode = EIP197_TOKEN_OPCODE_RETRIEVE;
atoken->packet_length = digestsize;
atoken->stat = EIP197_TOKEN_STAT_LAST_HASH |
EIP197_TOKEN_STAT_LAST_PACKET;
atoken->instructions = EIP197_TOKEN_INS_INSERT_HASH_DIGEST;
atoken++;
atoksize++;
/* Verify ICV */
atoken->opcode = EIP197_TOKEN_OPCODE_VERIFY;
atoken->packet_length = digestsize |
EIP197_TOKEN_HASH_RESULT_VERIFY;
atoken->stat = EIP197_TOKEN_STAT_LAST_HASH |
EIP197_TOKEN_STAT_LAST_PACKET;
atoken->instructions = EIP197_TOKEN_INS_TYPE_OUTPUT;
}
/* Fixup length of the token in the command descriptor */
cdesc->additional_cdata_size = atoksize;
}
static int safexcel_skcipher_aes_setkey(struct crypto_skcipher *ctfm,
const u8 *key, unsigned int len)
{
struct crypto_tfm *tfm = crypto_skcipher_tfm(ctfm);
struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
struct safexcel_crypto_priv *priv = ctx->base.priv;
struct crypto_aes_ctx aes;
int ret, i;
ret = aes_expandkey(&aes, key, len);
if (ret)
return ret;
if (priv->flags & EIP197_TRC_CACHE && ctx->base.ctxr_dma) {
for (i = 0; i < len / sizeof(u32); i++) {
if (le32_to_cpu(ctx->key[i]) != aes.key_enc[i]) {
ctx->base.needs_inv = true;
break;
}
}
}
for (i = 0; i < len / sizeof(u32); i++)
ctx->key[i] = cpu_to_le32(aes.key_enc[i]);
ctx->key_len = len;
memzero_explicit(&aes, sizeof(aes));
return 0;
}
static int safexcel_aead_setkey(struct crypto_aead *ctfm, const u8 *key,
unsigned int len)
{
struct crypto_tfm *tfm = crypto_aead_tfm(ctfm);
struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
struct safexcel_crypto_priv *priv = ctx->base.priv;
struct crypto_authenc_keys keys;
struct crypto_aes_ctx aes;
int err = -EINVAL, i;
const char *alg;
if (unlikely(crypto_authenc_extractkeys(&keys, key, len)))
goto badkey;
if (ctx->mode == CONTEXT_CONTROL_CRYPTO_MODE_CTR_LOAD) {
/* Must have at least space for the nonce here */
if (unlikely(keys.enckeylen < CTR_RFC3686_NONCE_SIZE))
goto badkey;
/* last 4 bytes of key are the nonce! */
ctx->nonce = *(u32 *)(keys.enckey + keys.enckeylen -
CTR_RFC3686_NONCE_SIZE);
/* exclude the nonce here */
keys.enckeylen -= CTR_RFC3686_NONCE_SIZE;
}
/* Encryption key */
switch (ctx->alg) {
case SAFEXCEL_DES:
err = verify_aead_des_key(ctfm, keys.enckey, keys.enckeylen);
if (unlikely(err))
goto badkey;
break;
case SAFEXCEL_3DES:
err = verify_aead_des3_key(ctfm, keys.enckey, keys.enckeylen);
if (unlikely(err))
goto badkey;
break;
case SAFEXCEL_AES:
err = aes_expandkey(&aes, keys.enckey, keys.enckeylen);
if (unlikely(err))
goto badkey;
break;
case SAFEXCEL_SM4:
if (unlikely(keys.enckeylen != SM4_KEY_SIZE))
goto badkey;
break;
default:
dev_err(priv->dev, "aead: unsupported cipher algorithm\n");
goto badkey;
}
if (priv->flags & EIP197_TRC_CACHE && ctx->base.ctxr_dma) {
for (i = 0; i < keys.enckeylen / sizeof(u32); i++) {
if (le32_to_cpu(ctx->key[i]) !=
((u32 *)keys.enckey)[i]) {
ctx->base.needs_inv = true;
break;
}
}
}
/* Auth key */
switch (ctx->hash_alg) {
case CONTEXT_CONTROL_CRYPTO_ALG_SHA1:
alg = "safexcel-sha1";
break;
case CONTEXT_CONTROL_CRYPTO_ALG_SHA224:
alg = "safexcel-sha224";
break;
case CONTEXT_CONTROL_CRYPTO_ALG_SHA256:
alg = "safexcel-sha256";
break;
case CONTEXT_CONTROL_CRYPTO_ALG_SHA384:
alg = "safexcel-sha384";
break;
case CONTEXT_CONTROL_CRYPTO_ALG_SHA512:
alg = "safexcel-sha512";
break;
case CONTEXT_CONTROL_CRYPTO_ALG_SM3:
alg = "safexcel-sm3";
break;
default:
dev_err(priv->dev, "aead: unsupported hash algorithm\n");
goto badkey;
}
if (safexcel_hmac_setkey(&ctx->base, keys.authkey, keys.authkeylen,
alg, ctx->state_sz))
goto badkey;
/* Now copy the keys into the context */
for (i = 0; i < keys.enckeylen / sizeof(u32); i++)
ctx->key[i] = cpu_to_le32(((u32 *)keys.enckey)[i]);
ctx->key_len = keys.enckeylen;
memzero_explicit(&keys, sizeof(keys));
return 0;
badkey:
memzero_explicit(&keys, sizeof(keys));
return err;
}
static int safexcel_context_control(struct safexcel_cipher_ctx *ctx,
struct crypto_async_request *async,
struct safexcel_cipher_req *sreq,
struct safexcel_command_desc *cdesc)
{
struct safexcel_crypto_priv *priv = ctx->base.priv;
int ctrl_size = ctx->key_len / sizeof(u32);
cdesc->control_data.control1 = ctx->mode;
if (ctx->aead) {
/* Take in account the ipad+opad digests */
if (ctx->xcm) {
ctrl_size += ctx->state_sz / sizeof(u32);
cdesc->control_data.control0 =
CONTEXT_CONTROL_KEY_EN |
CONTEXT_CONTROL_DIGEST_XCM |
ctx->hash_alg |
CONTEXT_CONTROL_SIZE(ctrl_size);
} else if (ctx->alg == SAFEXCEL_CHACHA20) {
/* Chacha20-Poly1305 */
cdesc->control_data.control0 =
CONTEXT_CONTROL_KEY_EN |
CONTEXT_CONTROL_CRYPTO_ALG_CHACHA20 |
(sreq->direction == SAFEXCEL_ENCRYPT ?
CONTEXT_CONTROL_TYPE_ENCRYPT_HASH_OUT :
CONTEXT_CONTROL_TYPE_HASH_DECRYPT_IN) |
ctx->hash_alg |
CONTEXT_CONTROL_SIZE(ctrl_size);
return 0;
} else {
ctrl_size += ctx->state_sz / sizeof(u32) * 2;
cdesc->control_data.control0 =
CONTEXT_CONTROL_KEY_EN |
CONTEXT_CONTROL_DIGEST_HMAC |
ctx->hash_alg |
CONTEXT_CONTROL_SIZE(ctrl_size);
}
if (sreq->direction == SAFEXCEL_ENCRYPT &&
(ctx->xcm == EIP197_XCM_MODE_CCM ||
ctx->aead == EIP197_AEAD_TYPE_IPSEC_ESP_GMAC))
cdesc->control_data.control0 |=
CONTEXT_CONTROL_TYPE_HASH_ENCRYPT_OUT;
else if (sreq->direction == SAFEXCEL_ENCRYPT)
cdesc->control_data.control0 |=
CONTEXT_CONTROL_TYPE_ENCRYPT_HASH_OUT;
else if (ctx->xcm == EIP197_XCM_MODE_CCM)
cdesc->control_data.control0 |=
CONTEXT_CONTROL_TYPE_DECRYPT_HASH_IN;
else
cdesc->control_data.control0 |=
CONTEXT_CONTROL_TYPE_HASH_DECRYPT_IN;
} else {
if (sreq->direction == SAFEXCEL_ENCRYPT)
cdesc->control_data.control0 =
CONTEXT_CONTROL_TYPE_CRYPTO_OUT |
CONTEXT_CONTROL_KEY_EN |
CONTEXT_CONTROL_SIZE(ctrl_size);
else
cdesc->control_data.control0 =
CONTEXT_CONTROL_TYPE_CRYPTO_IN |
CONTEXT_CONTROL_KEY_EN |
CONTEXT_CONTROL_SIZE(ctrl_size);
}
if (ctx->alg == SAFEXCEL_DES) {
cdesc->control_data.control0 |=
CONTEXT_CONTROL_CRYPTO_ALG_DES;
} else if (ctx->alg == SAFEXCEL_3DES) {
cdesc->control_data.control0 |=
CONTEXT_CONTROL_CRYPTO_ALG_3DES;
} else if (ctx->alg == SAFEXCEL_AES) {
switch (ctx->key_len >> ctx->xts) {
case AES_KEYSIZE_128:
cdesc->control_data.control0 |=
CONTEXT_CONTROL_CRYPTO_ALG_AES128;
break;
case AES_KEYSIZE_192:
cdesc->control_data.control0 |=
CONTEXT_CONTROL_CRYPTO_ALG_AES192;
break;
case AES_KEYSIZE_256:
cdesc->control_data.control0 |=
CONTEXT_CONTROL_CRYPTO_ALG_AES256;
break;
default:
dev_err(priv->dev, "aes keysize not supported: %u\n",
ctx->key_len >> ctx->xts);
return -EINVAL;
}
} else if (ctx->alg == SAFEXCEL_CHACHA20) {
cdesc->control_data.control0 |=
CONTEXT_CONTROL_CRYPTO_ALG_CHACHA20;
} else if (ctx->alg == SAFEXCEL_SM4) {
cdesc->control_data.control0 |=
CONTEXT_CONTROL_CRYPTO_ALG_SM4;
}
return 0;
}
static int safexcel_handle_req_result(struct safexcel_crypto_priv *priv, int ring,
struct crypto_async_request *async,
struct scatterlist *src,
struct scatterlist *dst,
unsigned int cryptlen,
struct safexcel_cipher_req *sreq,
bool *should_complete, int *ret)
{
struct skcipher_request *areq = skcipher_request_cast(async);
struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(areq);
struct safexcel_cipher_ctx *ctx = crypto_skcipher_ctx(skcipher);
struct safexcel_result_desc *rdesc;
int ndesc = 0;
*ret = 0;
if (unlikely(!sreq->rdescs))
return 0;
while (sreq->rdescs--) {
rdesc = safexcel_ring_next_rptr(priv, &priv->ring[ring].rdr);
if (IS_ERR(rdesc)) {
dev_err(priv->dev,
"cipher: result: could not retrieve the result descriptor\n");
*ret = PTR_ERR(rdesc);
break;
}
if (likely(!*ret))
*ret = safexcel_rdesc_check_errors(priv, rdesc);
ndesc++;
}
safexcel_complete(priv, ring);
if (src == dst) {
if (sreq->nr_src > 0)
dma_unmap_sg(priv->dev, src, sreq->nr_src,
DMA_BIDIRECTIONAL);
} else {
if (sreq->nr_src > 0)
dma_unmap_sg(priv->dev, src, sreq->nr_src,
DMA_TO_DEVICE);
if (sreq->nr_dst > 0)
dma_unmap_sg(priv->dev, dst, sreq->nr_dst,
DMA_FROM_DEVICE);
}
/*
* Update IV in req from last crypto output word for CBC modes
*/
if ((!ctx->aead) && (ctx->mode == CONTEXT_CONTROL_CRYPTO_MODE_CBC) &&
(sreq->direction == SAFEXCEL_ENCRYPT)) {
/* For encrypt take the last output word */
sg_pcopy_to_buffer(dst, sreq->nr_dst, areq->iv,
crypto_skcipher_ivsize(skcipher),
(cryptlen -
crypto_skcipher_ivsize(skcipher)));
}
*should_complete = true;
return ndesc;
}
static int safexcel_send_req(struct crypto_async_request *base, int ring,
struct safexcel_cipher_req *sreq,
struct scatterlist *src, struct scatterlist *dst,
unsigned int cryptlen, unsigned int assoclen,
unsigned int digestsize, u8 *iv, int *commands,
int *results)
{
struct skcipher_request *areq = skcipher_request_cast(base);
struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(areq);
struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(base->tfm);
struct safexcel_crypto_priv *priv = ctx->base.priv;
struct safexcel_command_desc *cdesc;
struct safexcel_command_desc *first_cdesc = NULL;
struct safexcel_result_desc *rdesc, *first_rdesc = NULL;
struct scatterlist *sg;
unsigned int totlen;
unsigned int totlen_src = cryptlen + assoclen;
unsigned int totlen_dst = totlen_src;
struct safexcel_token *atoken;
int n_cdesc = 0, n_rdesc = 0;
int queued, i, ret = 0;
bool first = true;
sreq->nr_src = sg_nents_for_len(src, totlen_src);
if (ctx->aead) {
/*
* AEAD has auth tag appended to output for encrypt and
* removed from the output for decrypt!
*/
if (sreq->direction == SAFEXCEL_DECRYPT)
totlen_dst -= digestsize;
else
totlen_dst += digestsize;
memcpy(ctx->base.ctxr->data + ctx->key_len / sizeof(u32),
&ctx->base.ipad, ctx->state_sz);
if (!ctx->xcm)
memcpy(ctx->base.ctxr->data + (ctx->key_len +
ctx->state_sz) / sizeof(u32), &ctx->base.opad,
ctx->state_sz);
} else if ((ctx->mode == CONTEXT_CONTROL_CRYPTO_MODE_CBC) &&
(sreq->direction == SAFEXCEL_DECRYPT)) {
/*
* Save IV from last crypto input word for CBC modes in decrypt
* direction. Need to do this first in case of inplace operation
* as it will be overwritten.
*/
sg_pcopy_to_buffer(src, sreq->nr_src, areq->iv,
crypto_skcipher_ivsize(skcipher),
(totlen_src -
crypto_skcipher_ivsize(skcipher)));
}
sreq->nr_dst = sg_nents_for_len(dst, totlen_dst);
/*
* Remember actual input length, source buffer length may be
* updated in case of inline operation below.
*/
totlen = totlen_src;
queued = totlen_src;
if (src == dst) {
sreq->nr_src = max(sreq->nr_src, sreq->nr_dst);
sreq->nr_dst = sreq->nr_src;
if (unlikely((totlen_src || totlen_dst) &&
(sreq->nr_src <= 0))) {
dev_err(priv->dev, "In-place buffer not large enough (need %d bytes)!",
max(totlen_src, totlen_dst));
return -EINVAL;
}
if (sreq->nr_src > 0 &&
!dma_map_sg(priv->dev, src, sreq->nr_src, DMA_BIDIRECTIONAL))
return -EIO;
} else {
if (unlikely(totlen_src && (sreq->nr_src <= 0))) {
dev_err(priv->dev, "Source buffer not large enough (need %d bytes)!",
totlen_src);
return -EINVAL;
}
if (sreq->nr_src > 0 &&
!dma_map_sg(priv->dev, src, sreq->nr_src, DMA_TO_DEVICE))
return -EIO;
if (unlikely(totlen_dst && (sreq->nr_dst <= 0))) {
dev_err(priv->dev, "Dest buffer not large enough (need %d bytes)!",
totlen_dst);
ret = -EINVAL;
goto unmap;
}
if (sreq->nr_dst > 0 &&
!dma_map_sg(priv->dev, dst, sreq->nr_dst, DMA_FROM_DEVICE)) {
ret = -EIO;
goto unmap;
}
}
memcpy(ctx->base.ctxr->data, ctx->key, ctx->key_len);
if (!totlen) {
/*
* The EIP97 cannot deal with zero length input packets!
* So stuff a dummy command descriptor indicating a 1 byte
* (dummy) input packet, using the context record as source.
*/
first_cdesc = safexcel_add_cdesc(priv, ring,
1, 1, ctx->base.ctxr_dma,
1, 1, ctx->base.ctxr_dma,
&atoken);
if (IS_ERR(first_cdesc)) {
/* No space left in the command descriptor ring */
ret = PTR_ERR(first_cdesc);
goto cdesc_rollback;
}
n_cdesc = 1;
goto skip_cdesc;
}
/* command descriptors */
for_each_sg(src, sg, sreq->nr_src, i) {
int len = sg_dma_len(sg);
/* Do not overflow the request */
if (queued < len)
len = queued;
cdesc = safexcel_add_cdesc(priv, ring, !n_cdesc,
!(queued - len),
sg_dma_address(sg), len, totlen,
ctx->base.ctxr_dma, &atoken);
if (IS_ERR(cdesc)) {
/* No space left in the command descriptor ring */
ret = PTR_ERR(cdesc);
goto cdesc_rollback;
}
if (!n_cdesc)
first_cdesc = cdesc;
n_cdesc++;
queued -= len;
if (!queued)
break;
}
skip_cdesc:
/* Add context control words and token to first command descriptor */
safexcel_context_control(ctx, base, sreq, first_cdesc);
if (ctx->aead)
safexcel_aead_token(ctx, iv, first_cdesc, atoken,
sreq->direction, cryptlen,
assoclen, digestsize);
else
safexcel_skcipher_token(ctx, iv, first_cdesc, atoken,
cryptlen);
/* result descriptors */
for_each_sg(dst, sg, sreq->nr_dst, i) {
bool last = (i == sreq->nr_dst - 1);
u32 len = sg_dma_len(sg);
/* only allow the part of the buffer we know we need */
if (len > totlen_dst)
len = totlen_dst;
if (unlikely(!len))
break;
totlen_dst -= len;
/* skip over AAD space in buffer - not written */
if (assoclen) {
if (assoclen >= len) {
assoclen -= len;
continue;
}
rdesc = safexcel_add_rdesc(priv, ring, first, last,
sg_dma_address(sg) +
assoclen,
len - assoclen);
assoclen = 0;
} else {
rdesc = safexcel_add_rdesc(priv, ring, first, last,
sg_dma_address(sg),
len);
}
if (IS_ERR(rdesc)) {
/* No space left in the result descriptor ring */
ret = PTR_ERR(rdesc);
goto rdesc_rollback;
}
if (first) {
first_rdesc = rdesc;
first = false;
}
n_rdesc++;
}
if (unlikely(first)) {
/*
* Special case: AEAD decrypt with only AAD data.
* In this case there is NO output data from the engine,
* but the engine still needs a result descriptor!
* Create a dummy one just for catching the result token.
*/
rdesc = safexcel_add_rdesc(priv, ring, true, true, 0, 0);
if (IS_ERR(rdesc)) {
/* No space left in the result descriptor ring */
ret = PTR_ERR(rdesc);
goto rdesc_rollback;
}
first_rdesc = rdesc;
n_rdesc = 1;
}
safexcel_rdr_req_set(priv, ring, first_rdesc, base);
*commands = n_cdesc;
*results = n_rdesc;
return 0;
rdesc_rollback:
for (i = 0; i < n_rdesc; i++)
safexcel_ring_rollback_wptr(priv, &priv->ring[ring].rdr);
cdesc_rollback:
for (i = 0; i < n_cdesc; i++)
safexcel_ring_rollback_wptr(priv, &priv->ring[ring].cdr);
unmap:
if (src == dst) {
if (sreq->nr_src > 0)
dma_unmap_sg(priv->dev, src, sreq->nr_src,
DMA_BIDIRECTIONAL);
} else {
if (sreq->nr_src > 0)
dma_unmap_sg(priv->dev, src, sreq->nr_src,
DMA_TO_DEVICE);
if (sreq->nr_dst > 0)
dma_unmap_sg(priv->dev, dst, sreq->nr_dst,
DMA_FROM_DEVICE);
}
return ret;
}
static int safexcel_handle_inv_result(struct safexcel_crypto_priv *priv,
int ring,
struct crypto_async_request *base,
struct safexcel_cipher_req *sreq,
bool *should_complete, int *ret)
{
struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(base->tfm);
struct safexcel_result_desc *rdesc;
int ndesc = 0, enq_ret;
*ret = 0;
if (unlikely(!sreq->rdescs))
return 0;
while (sreq->rdescs--) {
rdesc = safexcel_ring_next_rptr(priv, &priv->ring[ring].rdr);
if (IS_ERR(rdesc)) {
dev_err(priv->dev,
"cipher: invalidate: could not retrieve the result descriptor\n");
*ret = PTR_ERR(rdesc);
break;
}
if (likely(!*ret))
*ret = safexcel_rdesc_check_errors(priv, rdesc);
ndesc++;
}
safexcel_complete(priv, ring);
if (ctx->base.exit_inv) {
dma_pool_free(priv->context_pool, ctx->base.ctxr,
ctx->base.ctxr_dma);
*should_complete = true;
return ndesc;
}
ring = safexcel_select_ring(priv);
ctx->base.ring = ring;
spin_lock_bh(&priv->ring[ring].queue_lock);
enq_ret = crypto_enqueue_request(&priv->ring[ring].queue, base);
spin_unlock_bh(&priv->ring[ring].queue_lock);
if (enq_ret != -EINPROGRESS)
*ret = enq_ret;
queue_work(priv->ring[ring].workqueue,
&priv->ring[ring].work_data.work);
*should_complete = false;
return ndesc;
}
static int safexcel_skcipher_handle_result(struct safexcel_crypto_priv *priv,
int ring,
struct crypto_async_request *async,
bool *should_complete, int *ret)
{
struct skcipher_request *req = skcipher_request_cast(async);
struct safexcel_cipher_req *sreq = skcipher_request_ctx(req);
int err;
if (sreq->needs_inv) {
sreq->needs_inv = false;
err = safexcel_handle_inv_result(priv, ring, async, sreq,
should_complete, ret);
} else {
err = safexcel_handle_req_result(priv, ring, async, req->src,
req->dst, req->cryptlen, sreq,
should_complete, ret);
}
return err;
}
static int safexcel_aead_handle_result(struct safexcel_crypto_priv *priv,
int ring,
struct crypto_async_request *async,