summaryrefslogtreecommitdiff
path: root/arch/x86/crypto/aesni-intel_glue.c
blob: 585edebe12cffa97d0b6c7381b66f6b38b81bc80 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
/*
 * Support for Intel AES-NI instructions. This file contains glue
 * code, the real AES implementation is in intel-aes_asm.S.
 *
 * Copyright (C) 2008, Intel Corp.
 *    Author: Huang Ying <ying.huang@intel.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 of the License, or
 * (at your option) any later version.
 */

#include <linux/hardirq.h>
#include <linux/types.h>
#include <linux/crypto.h>
#include <linux/err.h>
#include <crypto/algapi.h>
#include <crypto/aes.h>
#include <crypto/cryptd.h>
#include <asm/i387.h>
#include <asm/aes.h>

#if defined(CONFIG_CRYPTO_CTR) || defined(CONFIG_CRYPTO_CTR_MODULE)
#define HAS_CTR
#endif

#if defined(CONFIG_CRYPTO_LRW) || defined(CONFIG_CRYPTO_LRW_MODULE)
#define HAS_LRW
#endif

#if defined(CONFIG_CRYPTO_PCBC) || defined(CONFIG_CRYPTO_PCBC_MODULE)
#define HAS_PCBC
#endif

#if defined(CONFIG_CRYPTO_XTS) || defined(CONFIG_CRYPTO_XTS_MODULE)
#define HAS_XTS
#endif

struct async_aes_ctx {
	struct cryptd_ablkcipher *cryptd_tfm;
};

#define AESNI_ALIGN	16
#define AES_BLOCK_MASK	(~(AES_BLOCK_SIZE-1))

asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
			     unsigned int key_len);
asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out,
			  const u8 *in);
asmlinkage void aesni_dec(struct crypto_aes_ctx *ctx, u8 *out,
			  const u8 *in);
asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out,
			      const u8 *in, unsigned int len);
asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out,
			      const u8 *in, unsigned int len);
asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
			      const u8 *in, unsigned int len, u8 *iv);
asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
			      const u8 *in, unsigned int len, u8 *iv);

static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
{
	unsigned long addr = (unsigned long)raw_ctx;
	unsigned long align = AESNI_ALIGN;

	if (align <= crypto_tfm_ctx_alignment())
		align = 1;
	return (struct crypto_aes_ctx *)ALIGN(addr, align);
}

static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
			      const u8 *in_key, unsigned int key_len)
{
	struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
	u32 *flags = &tfm->crt_flags;
	int err;

	if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
	    key_len != AES_KEYSIZE_256) {
		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
		return -EINVAL;
	}

	if (irq_fpu_usable())
		err = crypto_aes_expand_key(ctx, in_key, key_len);
	else {
		kernel_fpu_begin();
		err = aesni_set_key(ctx, in_key, key_len);
		kernel_fpu_end();
	}

	return err;
}

static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
		       unsigned int key_len)
{
	return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len);
}

static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));

	if (irq_fpu_usable())
		crypto_aes_encrypt_x86(ctx, dst, src);
	else {
		kernel_fpu_begin();
		aesni_enc(ctx, dst, src);
		kernel_fpu_end();
	}
}

static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));

	if (irq_fpu_usable())
		crypto_aes_decrypt_x86(ctx, dst, src);
	else {
		kernel_fpu_begin();
		aesni_dec(ctx, dst, src);
		kernel_fpu_end();
	}
}

static struct crypto_alg aesni_alg = {
	.cra_name		= "aes",
	.cra_driver_name	= "aes-aesni",
	.cra_priority		= 300,
	.cra_flags		= CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
	.cra_alignmask		= 0,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(aesni_alg.cra_list),
	.cra_u	= {
		.cipher	= {
			.cia_min_keysize	= AES_MIN_KEY_SIZE,
			.cia_max_keysize	= AES_MAX_KEY_SIZE,
			.cia_setkey		= aes_set_key,
			.cia_encrypt		= aes_encrypt,
			.cia_decrypt		= aes_decrypt
		}
	}
};

static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));

	aesni_enc(ctx, dst, src);
}

static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));

	aesni_dec(ctx, dst, src);
}

static struct crypto_alg __aesni_alg = {
	.cra_name		= "__aes-aesni",
	.cra_driver_name	= "__driver-aes-aesni",
	.cra_priority		= 0,
	.cra_flags		= CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
	.cra_alignmask		= 0,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(__aesni_alg.cra_list),
	.cra_u	= {
		.cipher	= {
			.cia_min_keysize	= AES_MIN_KEY_SIZE,
			.cia_max_keysize	= AES_MAX_KEY_SIZE,
			.cia_setkey		= aes_set_key,
			.cia_encrypt		= __aes_encrypt,
			.cia_decrypt		= __aes_decrypt
		}
	}
};

static int ecb_encrypt(struct blkcipher_desc *desc,
		       struct scatterlist *dst, struct scatterlist *src,
		       unsigned int nbytes)
{
	struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
	struct blkcipher_walk walk;
	int err;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	err = blkcipher_walk_virt(desc, &walk);
	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	kernel_fpu_begin();
	while ((nbytes = walk.nbytes)) {
		aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
			      nbytes & AES_BLOCK_MASK);
		nbytes &= AES_BLOCK_SIZE - 1;
		err = blkcipher_walk_done(desc, &walk, nbytes);
	}
	kernel_fpu_end();

	return err;
}

static int ecb_decrypt(struct blkcipher_desc *desc,
		       struct scatterlist *dst, struct scatterlist *src,
		       unsigned int nbytes)
{
	struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
	struct blkcipher_walk walk;
	int err;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	err = blkcipher_walk_virt(desc, &walk);
	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	kernel_fpu_begin();
	while ((nbytes = walk.nbytes)) {
		aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
			      nbytes & AES_BLOCK_MASK);
		nbytes &= AES_BLOCK_SIZE - 1;
		err = blkcipher_walk_done(desc, &walk, nbytes);
	}
	kernel_fpu_end();

	return err;
}

static struct crypto_alg blk_ecb_alg = {
	.cra_name		= "__ecb-aes-aesni",
	.cra_driver_name	= "__driver-ecb-aes-aesni",
	.cra_priority		= 0,
	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
	.cra_alignmask		= 0,
	.cra_type		= &crypto_blkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(blk_ecb_alg.cra_list),
	.cra_u = {
		.blkcipher = {
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.setkey		= aes_set_key,
			.encrypt	= ecb_encrypt,
			.decrypt	= ecb_decrypt,
		},
	},
};

static int cbc_encrypt(struct blkcipher_desc *desc,
		       struct scatterlist *dst, struct scatterlist *src,
		       unsigned int nbytes)
{
	struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
	struct blkcipher_walk walk;
	int err;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	err = blkcipher_walk_virt(desc, &walk);
	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	kernel_fpu_begin();
	while ((nbytes = walk.nbytes)) {
		aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
			      nbytes & AES_BLOCK_MASK, walk.iv);
		nbytes &= AES_BLOCK_SIZE - 1;
		err = blkcipher_walk_done(desc, &walk, nbytes);
	}
	kernel_fpu_end();

	return err;
}

static int cbc_decrypt(struct blkcipher_desc *desc,
		       struct scatterlist *dst, struct scatterlist *src,
		       unsigned int nbytes)
{
	struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
	struct blkcipher_walk walk;
	int err;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	err = blkcipher_walk_virt(desc, &walk);
	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	kernel_fpu_begin();
	while ((nbytes = walk.nbytes)) {
		aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
			      nbytes & AES_BLOCK_MASK, walk.iv);
		nbytes &= AES_BLOCK_SIZE - 1;
		err = blkcipher_walk_done(desc, &walk, nbytes);
	}
	kernel_fpu_end();

	return err;
}

static struct crypto_alg blk_cbc_alg = {
	.cra_name		= "__cbc-aes-aesni",
	.cra_driver_name	= "__driver-cbc-aes-aesni",
	.cra_priority		= 0,
	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
	.cra_alignmask		= 0,
	.cra_type		= &crypto_blkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(blk_cbc_alg.cra_list),
	.cra_u = {
		.blkcipher = {
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.setkey		= aes_set_key,
			.encrypt	= cbc_encrypt,
			.decrypt	= cbc_decrypt,
		},
	},
};

static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
			unsigned int key_len)
{
	struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
	struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base;
	int err;

	crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
	crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm)
				    & CRYPTO_TFM_REQ_MASK);
	err = crypto_ablkcipher_setkey(child, key, key_len);
	crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child)
				    & CRYPTO_TFM_RES_MASK);
	return err;
}

static int ablk_encrypt(struct ablkcipher_request *req)
{
	struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
	struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);

	if (irq_fpu_usable()) {
		struct ablkcipher_request *cryptd_req =
			ablkcipher_request_ctx(req);
		memcpy(cryptd_req, req, sizeof(*req));
		ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
		return crypto_ablkcipher_encrypt(cryptd_req);
	} else {
		struct blkcipher_desc desc;
		desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
		desc.info = req->info;
		desc.flags = 0;
		return crypto_blkcipher_crt(desc.tfm)->encrypt(
			&desc, req->dst, req->src, req->nbytes);
	}
}

static int ablk_decrypt(struct ablkcipher_request *req)
{
	struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
	struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);

	if (irq_fpu_usable()) {
		struct ablkcipher_request *cryptd_req =
			ablkcipher_request_ctx(req);
		memcpy(cryptd_req, req, sizeof(*req));
		ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
		return crypto_ablkcipher_decrypt(cryptd_req);
	} else {
		struct blkcipher_desc desc;
		desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
		desc.info = req->info;
		desc.flags = 0;
		return crypto_blkcipher_crt(desc.tfm)->decrypt(
			&desc, req->dst, req->src, req->nbytes);
	}
}

static void ablk_exit(struct crypto_tfm *tfm)
{
	struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm);

	cryptd_free_ablkcipher(ctx->cryptd_tfm);
}

static void ablk_init_common(struct crypto_tfm *tfm,
			     struct cryptd_ablkcipher *cryptd_tfm)
{
	struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm);

	ctx->cryptd_tfm = cryptd_tfm;
	tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) +
		crypto_ablkcipher_reqsize(&cryptd_tfm->base);
}

static int ablk_ecb_init(struct crypto_tfm *tfm)
{
	struct cryptd_ablkcipher *cryptd_tfm;

	cryptd_tfm = cryptd_alloc_ablkcipher("__driver-ecb-aes-aesni", 0, 0);
	if (IS_ERR(cryptd_tfm))
		return PTR_ERR(cryptd_tfm);
	ablk_init_common(tfm, cryptd_tfm);
	return 0;
}

static struct crypto_alg ablk_ecb_alg = {
	.cra_name		= "ecb(aes)",
	.cra_driver_name	= "ecb-aes-aesni",
	.cra_priority		= 400,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct async_aes_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(ablk_ecb_alg.cra_list),
	.cra_init		= ablk_ecb_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= ablk_encrypt,
			.decrypt	= ablk_decrypt,
		},
	},
};

static int ablk_cbc_init(struct crypto_tfm *tfm)
{
	struct cryptd_ablkcipher *cryptd_tfm;

	cryptd_tfm = cryptd_alloc_ablkcipher("__driver-cbc-aes-aesni", 0, 0);
	if (IS_ERR(cryptd_tfm))
		return PTR_ERR(cryptd_tfm);
	ablk_init_common(tfm, cryptd_tfm);
	return 0;
}

static struct crypto_alg ablk_cbc_alg = {
	.cra_name		= "cbc(aes)",
	.cra_driver_name	= "cbc-aes-aesni",
	.cra_priority		= 400,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct async_aes_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(ablk_cbc_alg.cra_list),
	.cra_init		= ablk_cbc_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.ivsize		= AES_BLOCK_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= ablk_encrypt,
			.decrypt	= ablk_decrypt,
		},
	},
};

#ifdef HAS_CTR
static int ablk_ctr_init(struct crypto_tfm *tfm)
{
	struct cryptd_ablkcipher *cryptd_tfm;

	cryptd_tfm = cryptd_alloc_ablkcipher("fpu(ctr(__driver-aes-aesni))",
					     0, 0);
	if (IS_ERR(cryptd_tfm))
		return PTR_ERR(cryptd_tfm);
	ablk_init_common(tfm, cryptd_tfm);
	return 0;
}

static struct crypto_alg ablk_ctr_alg = {
	.cra_name		= "ctr(aes)",
	.cra_driver_name	= "ctr-aes-aesni",
	.cra_priority		= 400,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
	.cra_blocksize		= 1,
	.cra_ctxsize		= sizeof(struct async_aes_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(ablk_ctr_alg.cra_list),
	.cra_init		= ablk_ctr_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.ivsize		= AES_BLOCK_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= ablk_encrypt,
			.decrypt	= ablk_decrypt,
			.geniv		= "chainiv",
		},
	},
};
#endif

#ifdef HAS_LRW
static int ablk_lrw_init(struct crypto_tfm *tfm)
{
	struct cryptd_ablkcipher *cryptd_tfm;

	cryptd_tfm = cryptd_alloc_ablkcipher("fpu(lrw(__driver-aes-aesni))",
					     0, 0);
	if (IS_ERR(cryptd_tfm))
		return PTR_ERR(cryptd_tfm);
	ablk_init_common(tfm, cryptd_tfm);
	return 0;
}

static struct crypto_alg ablk_lrw_alg = {
	.cra_name		= "lrw(aes)",
	.cra_driver_name	= "lrw-aes-aesni",
	.cra_priority		= 400,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct async_aes_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(ablk_lrw_alg.cra_list),
	.cra_init		= ablk_lrw_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= AES_MIN_KEY_SIZE + AES_BLOCK_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE + AES_BLOCK_SIZE,
			.ivsize		= AES_BLOCK_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= ablk_encrypt,
			.decrypt	= ablk_decrypt,
		},
	},
};
#endif

#ifdef HAS_PCBC
static int ablk_pcbc_init(struct crypto_tfm *tfm)
{
	struct cryptd_ablkcipher *cryptd_tfm;

	cryptd_tfm = cryptd_alloc_ablkcipher("fpu(pcbc(__driver-aes-aesni))",
					     0, 0);
	if (IS_ERR(cryptd_tfm))
		return PTR_ERR(cryptd_tfm);
	ablk_init_common(tfm, cryptd_tfm);
	return 0;
}

static struct crypto_alg ablk_pcbc_alg = {
	.cra_name		= "pcbc(aes)",
	.cra_driver_name	= "pcbc-aes-aesni",
	.cra_priority		= 400,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct async_aes_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(ablk_pcbc_alg.cra_list),
	.cra_init		= ablk_pcbc_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.ivsize		= AES_BLOCK_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= ablk_encrypt,
			.decrypt	= ablk_decrypt,
		},
	},
};
#endif

#ifdef HAS_XTS
static int ablk_xts_init(struct crypto_tfm *tfm)
{
	struct cryptd_ablkcipher *cryptd_tfm;

	cryptd_tfm = cryptd_alloc_ablkcipher("fpu(xts(__driver-aes-aesni))",
					     0, 0);
	if (IS_ERR(cryptd_tfm))
		return PTR_ERR(cryptd_tfm);
	ablk_init_common(tfm, cryptd_tfm);
	return 0;
}

static struct crypto_alg ablk_xts_alg = {
	.cra_name		= "xts(aes)",
	.cra_driver_name	= "xts-aes-aesni",
	.cra_priority		= 400,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
	.cra_blocksize		= AES_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct async_aes_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_list		= LIST_HEAD_INIT(ablk_xts_alg.cra_list),
	.cra_init		= ablk_xts_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= 2 * AES_MIN_KEY_SIZE,
			.max_keysize	= 2 * AES_MAX_KEY_SIZE,
			.ivsize		= AES_BLOCK_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= ablk_encrypt,
			.decrypt	= ablk_decrypt,
		},
	},
};
#endif

static int __init aesni_init(void)
{
	int err;

	if (!cpu_has_aes) {
		printk(KERN_INFO "Intel AES-NI instructions are not detected.\n");
		return -ENODEV;
	}
	if ((err = crypto_register_alg(&aesni_alg)))
		goto aes_err;
	if ((err = crypto_register_alg(&__aesni_alg)))
		goto __aes_err;
	if ((err = crypto_register_alg(&blk_ecb_alg)))
		goto blk_ecb_err;
	if ((err = crypto_register_alg(&blk_cbc_alg)))
		goto blk_cbc_err;
	if ((err = crypto_register_alg(&ablk_ecb_alg)))
		goto ablk_ecb_err;
	if ((err = crypto_register_alg(&ablk_cbc_alg)))
		goto ablk_cbc_err;
#ifdef HAS_CTR
	if ((err = crypto_register_alg(&ablk_ctr_alg)))
		goto ablk_ctr_err;
#endif
#ifdef HAS_LRW
	if ((err = crypto_register_alg(&ablk_lrw_alg)))
		goto ablk_lrw_err;
#endif
#ifdef HAS_PCBC
	if ((err = crypto_register_alg(&ablk_pcbc_alg)))
		goto ablk_pcbc_err;
#endif
#ifdef HAS_XTS
	if ((err = crypto_register_alg(&ablk_xts_alg)))
		goto ablk_xts_err;
#endif

	return err;

#ifdef HAS_XTS
ablk_xts_err:
#endif
#ifdef HAS_PCBC
	crypto_unregister_alg(&ablk_pcbc_alg);
ablk_pcbc_err:
#endif
#ifdef HAS_LRW
	crypto_unregister_alg(&ablk_lrw_alg);
ablk_lrw_err:
#endif
#ifdef HAS_CTR
	crypto_unregister_alg(&ablk_ctr_alg);
ablk_ctr_err:
#endif
	crypto_unregister_alg(&ablk_cbc_alg);
ablk_cbc_err:
	crypto_unregister_alg(&ablk_ecb_alg);
ablk_ecb_err:
	crypto_unregister_alg(&blk_cbc_alg);
blk_cbc_err:
	crypto_unregister_alg(&blk_ecb_alg);
blk_ecb_err:
	crypto_unregister_alg(&__aesni_alg);
__aes_err:
	crypto_unregister_alg(&aesni_alg);
aes_err:
	return err;
}

static void __exit aesni_exit(void)
{
#ifdef HAS_XTS
	crypto_unregister_alg(&ablk_xts_alg);
#endif
#ifdef HAS_PCBC
	crypto_unregister_alg(&ablk_pcbc_alg);
#endif
#ifdef HAS_LRW
	crypto_unregister_alg(&ablk_lrw_alg);
#endif
#ifdef HAS_CTR
	crypto_unregister_alg(&ablk_ctr_alg);
#endif
	crypto_unregister_alg(&ablk_cbc_alg);
	crypto_unregister_alg(&ablk_ecb_alg);
	crypto_unregister_alg(&blk_cbc_alg);
	crypto_unregister_alg(&blk_ecb_alg);
	crypto_unregister_alg(&__aesni_alg);
	crypto_unregister_alg(&aesni_alg);
}

module_init(aesni_init);
module_exit(aesni_exit);

MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
MODULE_LICENSE("GPL");
MODULE_ALIAS("aes");