arch/x86/crypto/aesni-intel_glue.c

   1 /*
   2  * Support for Intel AES-NI instructions. This file contains glue
   3  * code, the real AES implementation is in intel-aes_asm.S.
   4  *
   5  * Copyright (C) 2008, Intel Corp.
   6  *    Author: Huang Ying <ying.huang@intel.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/hardirq.h>
  15 #include <linux/types.h>
  16 #include <linux/crypto.h>
  17 #include <linux/err.h>
  18 #include <crypto/algapi.h>
  19 #include <crypto/aes.h>
  20 #include <crypto/cryptd.h>
  21 #include <asm/i387.h>
  22 #include <asm/aes.h>
  23
  24 #if defined(CONFIG_CRYPTO_CTR) || defined(CONFIG_CRYPTO_CTR_MODULE)
  25 #define HAS_CTR
  26 #endif
  27
  28 #if defined(CONFIG_CRYPTO_LRW) || defined(CONFIG_CRYPTO_LRW_MODULE)
  29 #define HAS_LRW
  30 #endif
  31
  32 #if defined(CONFIG_CRYPTO_PCBC) || defined(CONFIG_CRYPTO_PCBC_MODULE)
  33 #define HAS_PCBC
  34 #endif
  35
  36 #if defined(CONFIG_CRYPTO_XTS) || defined(CONFIG_CRYPTO_XTS_MODULE)
  37 #define HAS_XTS
  38 #endif
  39
  40 struct async_aes_ctx {
  41         struct cryptd_ablkcipher *cryptd_tfm;
  42 };
  43
  44 #define AESNI_ALIGN     16
  45 #define AES_BLOCK_MASK  (~(AES_BLOCK_SIZE-1))
  46
  47 asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
  48                              unsigned int key_len);
  49 asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out,
  50                           const u8 *in);
  51 asmlinkage void aesni_dec(struct crypto_aes_ctx *ctx, u8 *out,
  52                           const u8 *in);
  53 asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out,
  54                               const u8 *in, unsigned int len);
  55 asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out,
  56                               const u8 *in, unsigned int len);
  57 asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
  58                               const u8 *in, unsigned int len, u8 *iv);
  59 asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
  60                               const u8 *in, unsigned int len, u8 *iv);
  61
  62 static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
  63 {
  64         unsigned long addr = (unsigned long)raw_ctx;
  65         unsigned long align = AESNI_ALIGN;
  66
  67         if (align <= crypto_tfm_ctx_alignment())
  68                 align = 1;
  69         return (struct crypto_aes_ctx *)ALIGN(addr, align);
  70 }
  71
  72 static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
  73                               const u8 *in_key, unsigned int key_len)
  74 {
  75         struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
  76         u32 *flags = &tfm->crt_flags;
  77         int err;
  78
  79         if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
  80             key_len != AES_KEYSIZE_256) {
  81                 *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
  82                 return -EINVAL;
  83         }
  84
  85         if (irq_fpu_usable())
  86                 err = crypto_aes_expand_key(ctx, in_key, key_len);
  87         else {
  88                 kernel_fpu_begin();
  89                 err = aesni_set_key(ctx, in_key, key_len);
  90                 kernel_fpu_end();
  91         }
  92
  93         return err;
  94 }
  95
  96 static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
  97                        unsigned int key_len)
  98 {
  99         return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len);
 100 }
 101
 102 static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 103 {
 104         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 105
 106         if (irq_fpu_usable())
 107                 crypto_aes_encrypt_x86(ctx, dst, src);
 108         else {
 109                 kernel_fpu_begin();
 110                 aesni_enc(ctx, dst, src);
 111                 kernel_fpu_end();
 112         }
 113 }
 114
 115 static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 116 {
 117         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 118
 119         if (irq_fpu_usable())
 120                 crypto_aes_decrypt_x86(ctx, dst, src);
 121         else {
 122                 kernel_fpu_begin();
 123                 aesni_dec(ctx, dst, src);
 124                 kernel_fpu_end();
 125         }
 126 }
 127
 128 static struct crypto_alg aesni_alg = {
 129         .cra_name               = "aes",
 130         .cra_driver_name        = "aes-aesni",
 131         .cra_priority           = 300,
 132         .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
 133         .cra_blocksize          = AES_BLOCK_SIZE,
 134         .cra_ctxsize            = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
 135         .cra_alignmask          = 0,
 136         .cra_module             = THIS_MODULE,
 137         .cra_list               = LIST_HEAD_INIT(aesni_alg.cra_list),
 138         .cra_u  = {
 139                 .cipher = {
 140                         .cia_min_keysize        = AES_MIN_KEY_SIZE,
 141                         .cia_max_keysize        = AES_MAX_KEY_SIZE,
 142                         .cia_setkey             = aes_set_key,
 143                         .cia_encrypt            = aes_encrypt,
 144                         .cia_decrypt            = aes_decrypt
 145                 }
 146         }
 147 };
 148
 149 static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 150 {
 151         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 152
 153         aesni_enc(ctx, dst, src);
 154 }
 155
 156 static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 157 {
 158         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 159
 160         aesni_dec(ctx, dst, src);
 161 }
 162
 163 static struct crypto_alg __aesni_alg = {
 164         .cra_name               = "__aes-aesni",
 165         .cra_driver_name        = "__driver-aes-aesni",
 166         .cra_priority           = 0,
 167         .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
 168         .cra_blocksize          = AES_BLOCK_SIZE,
 169         .cra_ctxsize            = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
 170         .cra_alignmask          = 0,
 171         .cra_module             = THIS_MODULE,
 172         .cra_list               = LIST_HEAD_INIT(__aesni_alg.cra_list),
 173         .cra_u  = {
 174                 .cipher = {
 175                         .cia_min_keysize        = AES_MIN_KEY_SIZE,
 176                         .cia_max_keysize        = AES_MAX_KEY_SIZE,
 177                         .cia_setkey             = aes_set_key,
 178                         .cia_encrypt            = __aes_encrypt,
 179                         .cia_decrypt            = __aes_decrypt
 180                 }
 181         }
 182 };
 183
 184 static int ecb_encrypt(struct blkcipher_desc *desc,
 185                        struct scatterlist *dst, struct scatterlist *src,
 186                        unsigned int nbytes)
 187 {
 188         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
 189         struct blkcipher_walk walk;
 190         int err;
 191
 192         blkcipher_walk_init(&walk, dst, src, nbytes);
 193         err = blkcipher_walk_virt(desc, &walk);
 194         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 195
 196         kernel_fpu_begin();
 197         while ((nbytes = walk.nbytes)) {
 198                 aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 199                               nbytes & AES_BLOCK_MASK);
 200                 nbytes &= AES_BLOCK_SIZE - 1;
 201                 err = blkcipher_walk_done(desc, &walk, nbytes);
 202         }
 203         kernel_fpu_end();
 204
 205         return err;
 206 }
 207
 208 static int ecb_decrypt(struct blkcipher_desc *desc,
 209                        struct scatterlist *dst, struct scatterlist *src,
 210                        unsigned int nbytes)
 211 {
 212         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
 213         struct blkcipher_walk walk;
 214         int err;
 215
 216         blkcipher_walk_init(&walk, dst, src, nbytes);
 217         err = blkcipher_walk_virt(desc, &walk);
 218         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 219
 220         kernel_fpu_begin();
 221         while ((nbytes = walk.nbytes)) {
 222                 aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 223                               nbytes & AES_BLOCK_MASK);
 224                 nbytes &= AES_BLOCK_SIZE - 1;
 225                 err = blkcipher_walk_done(desc, &walk, nbytes);
 226         }
 227         kernel_fpu_end();
 228
 229         return err;
 230 }
 231
 232 static struct crypto_alg blk_ecb_alg = {
 233         .cra_name               = "__ecb-aes-aesni",
 234         .cra_driver_name        = "__driver-ecb-aes-aesni",
 235         .cra_priority           = 0,
 236         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
 237         .cra_blocksize          = AES_BLOCK_SIZE,
 238         .cra_ctxsize            = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
 239         .cra_alignmask          = 0,
 240         .cra_type               = &crypto_blkcipher_type,
 241         .cra_module             = THIS_MODULE,
 242         .cra_list               = LIST_HEAD_INIT(blk_ecb_alg.cra_list),
 243         .cra_u = {
 244                 .blkcipher = {
 245                         .min_keysize    = AES_MIN_KEY_SIZE,
 246                         .max_keysize    = AES_MAX_KEY_SIZE,
 247                         .setkey         = aes_set_key,
 248                         .encrypt        = ecb_encrypt,
 249                         .decrypt        = ecb_decrypt,
 250                 },
 251         },
 252 };
 253
 254 static int cbc_encrypt(struct blkcipher_desc *desc,
 255                        struct scatterlist *dst, struct scatterlist *src,
 256                        unsigned int nbytes)
 257 {
 258         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
 259         struct blkcipher_walk walk;
 260         int err;
 261
 262         blkcipher_walk_init(&walk, dst, src, nbytes);
 263         err = blkcipher_walk_virt(desc, &walk);
 264         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 265
 266         kernel_fpu_begin();
 267         while ((nbytes = walk.nbytes)) {
 268                 aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 269                               nbytes & AES_BLOCK_MASK, walk.iv);
 270                 nbytes &= AES_BLOCK_SIZE - 1;
 271                 err = blkcipher_walk_done(desc, &walk, nbytes);
 272         }
 273         kernel_fpu_end();
 274
 275         return err;
 276 }
 277
 278 static int cbc_decrypt(struct blkcipher_desc *desc,
 279                        struct scatterlist *dst, struct scatterlist *src,
 280                        unsigned int nbytes)
 281 {
 282         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
 283         struct blkcipher_walk walk;
 284         int err;
 285
 286         blkcipher_walk_init(&walk, dst, src, nbytes);
 287         err = blkcipher_walk_virt(desc, &walk);
 288         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 289
 290         kernel_fpu_begin();
 291         while ((nbytes = walk.nbytes)) {
 292                 aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 293                               nbytes & AES_BLOCK_MASK, walk.iv);
 294                 nbytes &= AES_BLOCK_SIZE - 1;
 295                 err = blkcipher_walk_done(desc, &walk, nbytes);
 296         }
 297         kernel_fpu_end();
 298
 299         return err;
 300 }
 301
 302 static struct crypto_alg blk_cbc_alg = {
 303         .cra_name               = "__cbc-aes-aesni",
 304         .cra_driver_name        = "__driver-cbc-aes-aesni",
 305         .cra_priority           = 0,
 306         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
 307         .cra_blocksize          = AES_BLOCK_SIZE,
 308         .cra_ctxsize            = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
 309         .cra_alignmask          = 0,
 310         .cra_type               = &crypto_blkcipher_type,
 311         .cra_module             = THIS_MODULE,
 312         .cra_list               = LIST_HEAD_INIT(blk_cbc_alg.cra_list),
 313         .cra_u = {
 314                 .blkcipher = {
 315                         .min_keysize    = AES_MIN_KEY_SIZE,
 316                         .max_keysize    = AES_MAX_KEY_SIZE,
 317                         .setkey         = aes_set_key,
 318                         .encrypt        = cbc_encrypt,
 319                         .decrypt        = cbc_decrypt,
 320                 },
 321         },
 322 };
 323
 324 static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
 325                         unsigned int key_len)
 326 {
 327         struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 328         struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base;
 329         int err;
 330
 331         crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
 332         crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm)
 333                                     & CRYPTO_TFM_REQ_MASK);
 334         err = crypto_ablkcipher_setkey(child, key, key_len);
 335         crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child)
 336                                     & CRYPTO_TFM_RES_MASK);
 337         return err;
 338 }
 339
 340 static int ablk_encrypt(struct ablkcipher_request *req)
 341 {
 342         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 343         struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 344
 345         if (irq_fpu_usable()) {
 346                 struct ablkcipher_request *cryptd_req =
 347                         ablkcipher_request_ctx(req);
 348                 memcpy(cryptd_req, req, sizeof(*req));
 349                 ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
 350                 return crypto_ablkcipher_encrypt(cryptd_req);
 351         } else {
 352                 struct blkcipher_desc desc;
 353                 desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
 354                 desc.info = req->info;
 355                 desc.flags = 0;
 356                 return crypto_blkcipher_crt(desc.tfm)->encrypt(
 357                         &desc, req->dst, req->src, req->nbytes);
 358         }
 359 }
 360
 361 static int ablk_decrypt(struct ablkcipher_request *req)
 362 {
 363         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 364         struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 365
 366         if (irq_fpu_usable()) {
 367                 struct ablkcipher_request *cryptd_req =
 368                         ablkcipher_request_ctx(req);
 369                 memcpy(cryptd_req, req, sizeof(*req));
 370                 ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
 371                 return crypto_ablkcipher_decrypt(cryptd_req);
 372         } else {
 373                 struct blkcipher_desc desc;
 374                 desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
 375                 desc.info = req->info;
 376                 desc.flags = 0;
 377                 return crypto_blkcipher_crt(desc.tfm)->decrypt(
 378                         &desc, req->dst, req->src, req->nbytes);
 379         }
 380 }
 381
 382 static void ablk_exit(struct crypto_tfm *tfm)
 383 {
 384         struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 385
 386         cryptd_free_ablkcipher(ctx->cryptd_tfm);
 387 }
 388
 389 static void ablk_init_common(struct crypto_tfm *tfm,
 390                              struct cryptd_ablkcipher *cryptd_tfm)
 391 {
 392         struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 393
 394         ctx->cryptd_tfm = cryptd_tfm;
 395         tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) +
 396                 crypto_ablkcipher_reqsize(&cryptd_tfm->base);
 397 }
 398
 399 static int ablk_ecb_init(struct crypto_tfm *tfm)
 400 {
 401         struct cryptd_ablkcipher *cryptd_tfm;
 402
 403         cryptd_tfm = cryptd_alloc_ablkcipher("__driver-ecb-aes-aesni", 0, 0);
 404         if (IS_ERR(cryptd_tfm))
 405                 return PTR_ERR(cryptd_tfm);
 406         ablk_init_common(tfm, cryptd_tfm);
 407         return 0;
 408 }
 409
 410 static struct crypto_alg ablk_ecb_alg = {
 411         .cra_name               = "ecb(aes)",
 412         .cra_driver_name        = "ecb-aes-aesni",
 413         .cra_priority           = 400,
 414         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 415         .cra_blocksize          = AES_BLOCK_SIZE,
 416         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 417         .cra_alignmask          = 0,
 418         .cra_type               = &crypto_ablkcipher_type,
 419         .cra_module             = THIS_MODULE,
 420         .cra_list               = LIST_HEAD_INIT(ablk_ecb_alg.cra_list),
 421         .cra_init               = ablk_ecb_init,
 422         .cra_exit               = ablk_exit,
 423         .cra_u = {
 424                 .ablkcipher = {
 425                         .min_keysize    = AES_MIN_KEY_SIZE,
 426                         .max_keysize    = AES_MAX_KEY_SIZE,
 427                         .setkey         = ablk_set_key,
 428                         .encrypt        = ablk_encrypt,
 429                         .decrypt        = ablk_decrypt,
 430                 },
 431         },
 432 };
 433
 434 static int ablk_cbc_init(struct crypto_tfm *tfm)
 435 {
 436         struct cryptd_ablkcipher *cryptd_tfm;
 437
 438         cryptd_tfm = cryptd_alloc_ablkcipher("__driver-cbc-aes-aesni", 0, 0);
 439         if (IS_ERR(cryptd_tfm))
 440                 return PTR_ERR(cryptd_tfm);
 441         ablk_init_common(tfm, cryptd_tfm);
 442         return 0;
 443 }
 444
 445 static struct crypto_alg ablk_cbc_alg = {
 446         .cra_name               = "cbc(aes)",
 447         .cra_driver_name        = "cbc-aes-aesni",
 448         .cra_priority           = 400,
 449         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 450         .cra_blocksize          = AES_BLOCK_SIZE,
 451         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 452         .cra_alignmask          = 0,
 453         .cra_type               = &crypto_ablkcipher_type,
 454         .cra_module             = THIS_MODULE,
 455         .cra_list               = LIST_HEAD_INIT(ablk_cbc_alg.cra_list),
 456         .cra_init               = ablk_cbc_init,
 457         .cra_exit               = ablk_exit,
 458         .cra_u = {
 459                 .ablkcipher = {
 460                         .min_keysize    = AES_MIN_KEY_SIZE,
 461                         .max_keysize    = AES_MAX_KEY_SIZE,
 462                         .ivsize         = AES_BLOCK_SIZE,
 463                         .setkey         = ablk_set_key,
 464                         .encrypt        = ablk_encrypt,
 465                         .decrypt        = ablk_decrypt,
 466                 },
 467         },
 468 };
 469
 470 #ifdef HAS_CTR
 471 static int ablk_ctr_init(struct crypto_tfm *tfm)
 472 {
 473         struct cryptd_ablkcipher *cryptd_tfm;
 474
 475         cryptd_tfm = cryptd_alloc_ablkcipher("fpu(ctr(__driver-aes-aesni))",
 476                                              0, 0);
 477         if (IS_ERR(cryptd_tfm))
 478                 return PTR_ERR(cryptd_tfm);
 479         ablk_init_common(tfm, cryptd_tfm);
 480         return 0;
 481 }
 482
 483 static struct crypto_alg ablk_ctr_alg = {
 484         .cra_name               = "ctr(aes)",
 485         .cra_driver_name        = "ctr-aes-aesni",
 486         .cra_priority           = 400,
 487         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 488         .cra_blocksize          = 1,
 489         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 490         .cra_alignmask          = 0,
 491         .cra_type               = &crypto_ablkcipher_type,
 492         .cra_module             = THIS_MODULE,
 493         .cra_list               = LIST_HEAD_INIT(ablk_ctr_alg.cra_list),
 494         .cra_init               = ablk_ctr_init,
 495         .cra_exit               = ablk_exit,
 496         .cra_u = {
 497                 .ablkcipher = {
 498                         .min_keysize    = AES_MIN_KEY_SIZE,
 499                         .max_keysize    = AES_MAX_KEY_SIZE,
 500                         .ivsize         = AES_BLOCK_SIZE,
 501                         .setkey         = ablk_set_key,
 502                         .encrypt        = ablk_encrypt,
 503                         .decrypt        = ablk_decrypt,
 504                         .geniv          = "chainiv",
 505                 },
 506         },
 507 };
 508 #endif
 509
 510 #ifdef HAS_LRW
 511 static int ablk_lrw_init(struct crypto_tfm *tfm)
 512 {
 513         struct cryptd_ablkcipher *cryptd_tfm;
 514
 515         cryptd_tfm = cryptd_alloc_ablkcipher("fpu(lrw(__driver-aes-aesni))",
 516                                              0, 0);
 517         if (IS_ERR(cryptd_tfm))
 518                 return PTR_ERR(cryptd_tfm);
 519         ablk_init_common(tfm, cryptd_tfm);
 520         return 0;
 521 }
 522
 523 static struct crypto_alg ablk_lrw_alg = {
 524         .cra_name               = "lrw(aes)",
 525         .cra_driver_name        = "lrw-aes-aesni",
 526         .cra_priority           = 400,
 527         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 528         .cra_blocksize          = AES_BLOCK_SIZE,
 529         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 530         .cra_alignmask          = 0,
 531         .cra_type               = &crypto_ablkcipher_type,
 532         .cra_module             = THIS_MODULE,
 533         .cra_list               = LIST_HEAD_INIT(ablk_lrw_alg.cra_list),
 534         .cra_init               = ablk_lrw_init,
 535         .cra_exit               = ablk_exit,
 536         .cra_u = {
 537                 .ablkcipher = {
 538                         .min_keysize    = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE,
 539                         .max_keysize    = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE,
 540                         .ivsize         = AES_BLOCK_SIZE,
 541                         .setkey         = ablk_set_key,
 542                         .encrypt        = ablk_encrypt,
 543                         .decrypt        = ablk_decrypt,
 544                 },
 545         },
 546 };
 547 #endif
 548
 549 #ifdef HAS_PCBC
 550 static int ablk_pcbc_init(struct crypto_tfm *tfm)
 551 {
 552         struct cryptd_ablkcipher *cryptd_tfm;
 553
 554         cryptd_tfm = cryptd_alloc_ablkcipher("fpu(pcbc(__driver-aes-aesni))",
 555                                              0, 0);
 556         if (IS_ERR(cryptd_tfm))
 557                 return PTR_ERR(cryptd_tfm);
 558         ablk_init_common(tfm, cryptd_tfm);
 559         return 0;
 560 }
 561
 562 static struct crypto_alg ablk_pcbc_alg = {
 563         .cra_name               = "pcbc(aes)",
 564         .cra_driver_name        = "pcbc-aes-aesni",
 565         .cra_priority           = 400,
 566         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 567         .cra_blocksize          = AES_BLOCK_SIZE,
 568         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 569         .cra_alignmask          = 0,
 570         .cra_type               = &crypto_ablkcipher_type,
 571         .cra_module             = THIS_MODULE,
 572         .cra_list               = LIST_HEAD_INIT(ablk_pcbc_alg.cra_list),
 573         .cra_init               = ablk_pcbc_init,
 574         .cra_exit               = ablk_exit,
 575         .cra_u = {
 576                 .ablkcipher = {
 577                         .min_keysize    = AES_MIN_KEY_SIZE,
 578                         .max_keysize    = AES_MAX_KEY_SIZE,
 579                         .ivsize         = AES_BLOCK_SIZE,
 580                         .setkey         = ablk_set_key,
 581                         .encrypt        = ablk_encrypt,
 582                         .decrypt        = ablk_decrypt,
 583                 },
 584         },
 585 };
 586 #endif
 587
 588 #ifdef HAS_XTS
 589 static int ablk_xts_init(struct crypto_tfm *tfm)
 590 {
 591         struct cryptd_ablkcipher *cryptd_tfm;
 592
 593         cryptd_tfm = cryptd_alloc_ablkcipher("fpu(xts(__driver-aes-aesni))",
 594                                              0, 0);
 595         if (IS_ERR(cryptd_tfm))
 596                 return PTR_ERR(cryptd_tfm);
 597         ablk_init_common(tfm, cryptd_tfm);
 598         return 0;
 599 }
 600
 601 static struct crypto_alg ablk_xts_alg = {
 602         .cra_name               = "xts(aes)",
 603         .cra_driver_name        = "xts-aes-aesni",
 604         .cra_priority           = 400,
 605         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 606         .cra_blocksize          = AES_BLOCK_SIZE,
 607         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 608         .cra_alignmask          = 0,
 609         .cra_type               = &crypto_ablkcipher_type,
 610         .cra_module             = THIS_MODULE,
 611         .cra_list               = LIST_HEAD_INIT(ablk_xts_alg.cra_list),
 612         .cra_init               = ablk_xts_init,
 613         .cra_exit               = ablk_exit,
 614         .cra_u = {
 615                 .ablkcipher = {
 616                         .min_keysize    = 2 * AES_MIN_KEY_SIZE,
 617                         .max_keysize    = 2 * AES_MAX_KEY_SIZE,
 618                         .ivsize         = AES_BLOCK_SIZE,
 619                         .setkey         = ablk_set_key,
 620                         .encrypt        = ablk_encrypt,
 621                         .decrypt        = ablk_decrypt,
 622                 },
 623         },
 624 };
 625 #endif
 626
 627 static int __init aesni_init(void)
 628 {
 629         int err;
 630
 631         if (!cpu_has_aes) {
 632                 printk(KERN_INFO "Intel AES-NI instructions are not detected.\n");
 633                 return -ENODEV;
 634         }
 635         if ((err = crypto_register_alg(&aesni_alg)))
 636                 goto aes_err;
 637         if ((err = crypto_register_alg(&__aesni_alg)))
 638                 goto __aes_err;
 639         if ((err = crypto_register_alg(&blk_ecb_alg)))
 640                 goto blk_ecb_err;
 641         if ((err = crypto_register_alg(&blk_cbc_alg)))
 642                 goto blk_cbc_err;
 643         if ((err = crypto_register_alg(&ablk_ecb_alg)))
 644                 goto ablk_ecb_err;
 645         if ((err = crypto_register_alg(&ablk_cbc_alg)))
 646                 goto ablk_cbc_err;
 647 #ifdef HAS_CTR
 648         if ((err = crypto_register_alg(&ablk_ctr_alg)))
 649                 goto ablk_ctr_err;
 650 #endif
 651 #ifdef HAS_LRW
 652         if ((err = crypto_register_alg(&ablk_lrw_alg)))
 653                 goto ablk_lrw_err;
 654 #endif
 655 #ifdef HAS_PCBC
 656         if ((err = crypto_register_alg(&ablk_pcbc_alg)))
 657                 goto ablk_pcbc_err;
 658 #endif
 659 #ifdef HAS_XTS
 660         if ((err = crypto_register_alg(&ablk_xts_alg)))
 661                 goto ablk_xts_err;
 662 #endif
 663
 664         return err;
 665
 666 #ifdef HAS_XTS
 667 ablk_xts_err:
 668 #endif
 669 #ifdef HAS_PCBC
 670         crypto_unregister_alg(&ablk_pcbc_alg);
 671 ablk_pcbc_err:
 672 #endif
 673 #ifdef HAS_LRW
 674         crypto_unregister_alg(&ablk_lrw_alg);
 675 ablk_lrw_err:
 676 #endif
 677 #ifdef HAS_CTR
 678         crypto_unregister_alg(&ablk_ctr_alg);
 679 ablk_ctr_err:
 680 #endif
 681         crypto_unregister_alg(&ablk_cbc_alg);
 682 ablk_cbc_err:
 683         crypto_unregister_alg(&ablk_ecb_alg);
 684 ablk_ecb_err:
 685         crypto_unregister_alg(&blk_cbc_alg);
 686 blk_cbc_err:
 687         crypto_unregister_alg(&blk_ecb_alg);
 688 blk_ecb_err:
 689         crypto_unregister_alg(&__aesni_alg);
 690 __aes_err:
 691         crypto_unregister_alg(&aesni_alg);
 692 aes_err:
 693         return err;
 694 }
 695
 696 static void __exit aesni_exit(void)
 697 {
 698 #ifdef HAS_XTS
 699         crypto_unregister_alg(&ablk_xts_alg);
 700 #endif
 701 #ifdef HAS_PCBC
 702         crypto_unregister_alg(&ablk_pcbc_alg);
 703 #endif
 704 #ifdef HAS_LRW
 705         crypto_unregister_alg(&ablk_lrw_alg);
 706 #endif
 707 #ifdef HAS_CTR
 708         crypto_unregister_alg(&ablk_ctr_alg);
 709 #endif
 710         crypto_unregister_alg(&ablk_cbc_alg);
 711         crypto_unregister_alg(&ablk_ecb_alg);
 712         crypto_unregister_alg(&blk_cbc_alg);
 713         crypto_unregister_alg(&blk_ecb_alg);
 714         crypto_unregister_alg(&__aesni_alg);
 715         crypto_unregister_alg(&aesni_alg);
 716 }
 717
 718 module_init(aesni_init);
 719 module_exit(aesni_exit);
 720
 721 MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
 722 MODULE_LICENSE("GPL");
 723 MODULE_ALIAS("aes");