drivers/crypto/marvell/cipher.c

   1 /*
   2  * Cipher algorithms supported by the CESA: DES, 3DES and AES.
   3  *
   4  * Author: Boris Brezillon <boris.brezillon@free-electrons.com>
   5  * Author: Arnaud Ebalard <arno@natisbad.org>
   6  *
   7  * This work is based on an initial version written by
   8  * Sebastian Andrzej Siewior < sebastian at breakpoint dot cc >
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License version 2 as published
  12  * by the Free Software Foundation.
  13  */
  14
  15 #include <crypto/aes.h>
  16 #include <crypto/des.h>
  17
  18 #include "cesa.h"
  19
  20 struct mv_cesa_des_ctx {
  21         struct mv_cesa_ctx base;
  22         u8 key[DES_KEY_SIZE];
  23 };
  24
  25 struct mv_cesa_des3_ctx {
  26         struct mv_cesa_ctx base;
  27         u8 key[DES3_EDE_KEY_SIZE];
  28 };
  29
  30 struct mv_cesa_aes_ctx {
  31         struct mv_cesa_ctx base;
  32         struct crypto_aes_ctx aes;
  33 };
  34
  35 struct mv_cesa_ablkcipher_dma_iter {
  36         struct mv_cesa_dma_iter base;
  37         struct mv_cesa_sg_dma_iter src;
  38         struct mv_cesa_sg_dma_iter dst;
  39 };
  40
  41 static inline void
  42 mv_cesa_ablkcipher_req_iter_init(struct mv_cesa_ablkcipher_dma_iter *iter,
  43                                  struct ablkcipher_request *req)
  44 {
  45         mv_cesa_req_dma_iter_init(&iter->base, req->nbytes);
  46         mv_cesa_sg_dma_iter_init(&iter->src, req->src, DMA_TO_DEVICE);
  47         mv_cesa_sg_dma_iter_init(&iter->dst, req->dst, DMA_FROM_DEVICE);
  48 }
  49
  50 static inline bool
  51 mv_cesa_ablkcipher_req_iter_next_op(struct mv_cesa_ablkcipher_dma_iter *iter)
  52 {
  53         iter->src.op_offset = 0;
  54         iter->dst.op_offset = 0;
  55
  56         return mv_cesa_req_dma_iter_next_op(&iter->base);
  57 }
  58
  59 static inline void
  60 mv_cesa_ablkcipher_dma_cleanup(struct ablkcipher_request *req)
  61 {
  62         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  63
  64         if (req->dst != req->src) {
  65                 dma_unmap_sg(cesa_dev->dev, req->dst, creq->dst_nents,
  66                              DMA_FROM_DEVICE);
  67                 dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents,
  68                              DMA_TO_DEVICE);
  69         } else {
  70                 dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents,
  71                              DMA_BIDIRECTIONAL);
  72         }
  73         mv_cesa_dma_cleanup(&creq->req.dma);
  74 }
  75
  76 static inline void mv_cesa_ablkcipher_cleanup(struct ablkcipher_request *req)
  77 {
  78         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  79
  80         if (creq->req.base.type == CESA_DMA_REQ)
  81                 mv_cesa_ablkcipher_dma_cleanup(req);
  82 }
  83
  84 static void mv_cesa_ablkcipher_std_step(struct ablkcipher_request *req)
  85 {
  86         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  87         struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
  88         struct mv_cesa_engine *engine = sreq->base.engine;
  89         size_t  len = min_t(size_t, req->nbytes - sreq->offset,
  90                             CESA_SA_SRAM_PAYLOAD_SIZE);
  91
  92         len = sg_pcopy_to_buffer(req->src, creq->src_nents,
  93                                  engine->sram + CESA_SA_DATA_SRAM_OFFSET,
  94                                  len, sreq->offset);
  95
  96         sreq->size = len;
  97         mv_cesa_set_crypt_op_len(&sreq->op, len);
  98
  99         /* FIXME: only update enc_len field */
 100         if (!sreq->skip_ctx) {
 101                 memcpy(engine->sram, &sreq->op, sizeof(sreq->op));
 102                 sreq->skip_ctx = true;
 103         } else {
 104                 memcpy(engine->sram, &sreq->op, sizeof(sreq->op.desc));
 105         }
 106
 107         mv_cesa_set_int_mask(engine, CESA_SA_INT_ACCEL0_DONE);
 108         writel(CESA_SA_CFG_PARA_DIS, engine->regs + CESA_SA_CFG);
 109         writel(CESA_SA_CMD_EN_CESA_SA_ACCL0, engine->regs + CESA_SA_CMD);
 110 }
 111
 112 static int mv_cesa_ablkcipher_std_process(struct ablkcipher_request *req,
 113                                           u32 status)
 114 {
 115         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 116         struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
 117         struct mv_cesa_engine *engine = sreq->base.engine;
 118         size_t len;
 119
 120         len = sg_pcopy_from_buffer(req->dst, creq->dst_nents,
 121                                    engine->sram + CESA_SA_DATA_SRAM_OFFSET,
 122                                    sreq->size, sreq->offset);
 123
 124         sreq->offset += len;
 125         if (sreq->offset < req->nbytes)
 126                 return -EINPROGRESS;
 127
 128         return 0;
 129 }
 130
 131 static int mv_cesa_ablkcipher_process(struct crypto_async_request *req,
 132                                       u32 status)
 133 {
 134         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 135         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
 136         struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
 137         struct mv_cesa_engine *engine = sreq->base.engine;
 138         int ret;
 139
 140         if (creq->req.base.type == CESA_DMA_REQ)
 141                 ret = mv_cesa_dma_process(&creq->req.dma, status);
 142         else
 143                 ret = mv_cesa_ablkcipher_std_process(ablkreq, status);
 144
 145         if (ret)
 146                 return ret;
 147
 148         memcpy(ablkreq->info, engine->sram + CESA_SA_CRYPT_IV_SRAM_OFFSET,
 149                crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(ablkreq)));
 150
 151         return 0;
 152 }
 153
 154 static void mv_cesa_ablkcipher_step(struct crypto_async_request *req)
 155 {
 156         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 157         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
 158
 159         if (creq->req.base.type == CESA_DMA_REQ)
 160                 mv_cesa_dma_step(&creq->req.dma);
 161         else
 162                 mv_cesa_ablkcipher_std_step(ablkreq);
 163 }
 164
 165 static inline void
 166 mv_cesa_ablkcipher_dma_prepare(struct ablkcipher_request *req)
 167 {
 168         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 169         struct mv_cesa_tdma_req *dreq = &creq->req.dma;
 170
 171         mv_cesa_dma_prepare(dreq, dreq->base.engine);
 172 }
 173
 174 static inline void
 175 mv_cesa_ablkcipher_std_prepare(struct ablkcipher_request *req)
 176 {
 177         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 178         struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
 179         struct mv_cesa_engine *engine = sreq->base.engine;
 180
 181         sreq->size = 0;
 182         sreq->offset = 0;
 183         mv_cesa_adjust_op(engine, &sreq->op);
 184         memcpy(engine->sram, &sreq->op, sizeof(sreq->op));
 185 }
 186
 187 static inline void mv_cesa_ablkcipher_prepare(struct crypto_async_request *req,
 188                                               struct mv_cesa_engine *engine)
 189 {
 190         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 191         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
 192         creq->req.base.engine = engine;
 193
 194         if (creq->req.base.type == CESA_DMA_REQ)
 195                 mv_cesa_ablkcipher_dma_prepare(ablkreq);
 196         else
 197                 mv_cesa_ablkcipher_std_prepare(ablkreq);
 198 }
 199
 200 static inline void
 201 mv_cesa_ablkcipher_req_cleanup(struct crypto_async_request *req)
 202 {
 203         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 204
 205         mv_cesa_ablkcipher_cleanup(ablkreq);
 206 }
 207
 208 static const struct mv_cesa_req_ops mv_cesa_ablkcipher_req_ops = {
 209         .step = mv_cesa_ablkcipher_step,
 210         .process = mv_cesa_ablkcipher_process,
 211         .prepare = mv_cesa_ablkcipher_prepare,
 212         .cleanup = mv_cesa_ablkcipher_req_cleanup,
 213 };
 214
 215 static int mv_cesa_ablkcipher_cra_init(struct crypto_tfm *tfm)
 216 {
 217         struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 218
 219         ctx->base.ops = &mv_cesa_ablkcipher_req_ops;
 220
 221         tfm->crt_ablkcipher.reqsize = sizeof(struct mv_cesa_ablkcipher_req);
 222
 223         return 0;
 224 }
 225
 226 static int mv_cesa_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
 227                               unsigned int len)
 228 {
 229         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 230         struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 231         int remaining;
 232         int offset;
 233         int ret;
 234         int i;
 235
 236         ret = crypto_aes_expand_key(&ctx->aes, key, len);
 237         if (ret) {
 238                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
 239                 return ret;
 240         }
 241
 242         remaining = (ctx->aes.key_length - 16) / 4;
 243         offset = ctx->aes.key_length + 24 - remaining;
 244         for (i = 0; i < remaining; i++)
 245                 ctx->aes.key_dec[4 + i] =
 246                         cpu_to_le32(ctx->aes.key_enc[offset + i]);
 247
 248         return 0;
 249 }
 250
 251 static int mv_cesa_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
 252                               unsigned int len)
 253 {
 254         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 255         struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(tfm);
 256         u32 tmp[DES_EXPKEY_WORDS];
 257         int ret;
 258
 259         if (len != DES_KEY_SIZE) {
 260                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
 261                 return -EINVAL;
 262         }
 263
 264         ret = des_ekey(tmp, key);
 265         if (!ret && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
 266                 tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
 267                 return -EINVAL;
 268         }
 269
 270         memcpy(ctx->key, key, DES_KEY_SIZE);
 271
 272         return 0;
 273 }
 274
 275 static int mv_cesa_des3_ede_setkey(struct crypto_ablkcipher *cipher,
 276                                    const u8 *key, unsigned int len)
 277 {
 278         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 279         struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(tfm);
 280
 281         if (len != DES3_EDE_KEY_SIZE) {
 282                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
 283                 return -EINVAL;
 284         }
 285
 286         memcpy(ctx->key, key, DES3_EDE_KEY_SIZE);
 287
 288         return 0;
 289 }
 290
 291 static int mv_cesa_ablkcipher_dma_req_init(struct ablkcipher_request *req,
 292                                 const struct mv_cesa_op_ctx *op_templ)
 293 {
 294         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 295         gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
 296                       GFP_KERNEL : GFP_ATOMIC;
 297         struct mv_cesa_tdma_req *dreq = &creq->req.dma;
 298         struct mv_cesa_ablkcipher_dma_iter iter;
 299         struct mv_cesa_tdma_chain chain;
 300         bool skip_ctx = false;
 301         int ret;
 302
 303         dreq->base.type = CESA_DMA_REQ;
 304         dreq->chain.first = NULL;
 305         dreq->chain.last = NULL;
 306
 307         if (req->src != req->dst) {
 308                 ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
 309                                  DMA_TO_DEVICE);
 310                 if (!ret)
 311                         return -ENOMEM;
 312
 313                 ret = dma_map_sg(cesa_dev->dev, req->dst, creq->dst_nents,
 314                                  DMA_FROM_DEVICE);
 315                 if (!ret) {
 316                         ret = -ENOMEM;
 317                         goto err_unmap_src;
 318                 }
 319         } else {
 320                 ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
 321                                  DMA_BIDIRECTIONAL);
 322                 if (!ret)
 323                         return -ENOMEM;
 324         }
 325
 326         mv_cesa_tdma_desc_iter_init(&chain);
 327         mv_cesa_ablkcipher_req_iter_init(&iter, req);
 328
 329         do {
 330                 struct mv_cesa_op_ctx *op;
 331
 332                 op = mv_cesa_dma_add_op(&chain, op_templ, skip_ctx, flags);
 333                 if (IS_ERR(op)) {
 334                         ret = PTR_ERR(op);
 335                         goto err_free_tdma;
 336                 }
 337                 skip_ctx = true;
 338
 339                 mv_cesa_set_crypt_op_len(op, iter.base.op_len);
 340
 341                 /* Add input transfers */
 342                 ret = mv_cesa_dma_add_op_transfers(&chain, &iter.base,
 343                                                    &iter.src, flags);
 344                 if (ret)
 345                         goto err_free_tdma;
 346
 347                 /* Add dummy desc to launch the crypto operation */
 348                 ret = mv_cesa_dma_add_dummy_launch(&chain, flags);
 349                 if (ret)
 350                         goto err_free_tdma;
 351
 352                 /* Add output transfers */
 353                 ret = mv_cesa_dma_add_op_transfers(&chain, &iter.base,
 354                                                    &iter.dst, flags);
 355                 if (ret)
 356                         goto err_free_tdma;
 357
 358         } while (mv_cesa_ablkcipher_req_iter_next_op(&iter));
 359
 360         dreq->chain = chain;
 361
 362         return 0;
 363
 364 err_free_tdma:
 365         mv_cesa_dma_cleanup(dreq);
 366         if (req->dst != req->src)
 367                 dma_unmap_sg(cesa_dev->dev, req->dst, creq->dst_nents,
 368                              DMA_FROM_DEVICE);
 369
 370 err_unmap_src:
 371         dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents,
 372                      req->dst != req->src ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL);
 373
 374         return ret;
 375 }
 376
 377 static inline int
 378 mv_cesa_ablkcipher_std_req_init(struct ablkcipher_request *req,
 379                                 const struct mv_cesa_op_ctx *op_templ)
 380 {
 381         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 382         struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
 383
 384         sreq->base.type = CESA_STD_REQ;
 385         sreq->op = *op_templ;
 386         sreq->skip_ctx = false;
 387
 388         return 0;
 389 }
 390
 391 static int mv_cesa_ablkcipher_req_init(struct ablkcipher_request *req,
 392                                        struct mv_cesa_op_ctx *tmpl)
 393 {
 394         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 395         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 396         unsigned int blksize = crypto_ablkcipher_blocksize(tfm);
 397         int ret;
 398
 399         if (!IS_ALIGNED(req->nbytes, blksize))
 400                 return -EINVAL;
 401
 402         creq->src_nents = sg_nents_for_len(req->src, req->nbytes);
 403         creq->dst_nents = sg_nents_for_len(req->dst, req->nbytes);
 404
 405         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_OP_CRYPT_ONLY,
 406                               CESA_SA_DESC_CFG_OP_MSK);
 407
 408         /* TODO: add a threshold for DMA usage */
 409         if (cesa_dev->caps->has_tdma)
 410                 ret = mv_cesa_ablkcipher_dma_req_init(req, tmpl);
 411         else
 412                 ret = mv_cesa_ablkcipher_std_req_init(req, tmpl);
 413
 414         return ret;
 415 }
 416
 417 static int mv_cesa_des_op(struct ablkcipher_request *req,
 418                           struct mv_cesa_op_ctx *tmpl)
 419 {
 420         struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 421         int ret;
 422
 423         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTM_DES,
 424                               CESA_SA_DESC_CFG_CRYPTM_MSK);
 425
 426         memcpy(tmpl->ctx.blkcipher.key, ctx->key, DES_KEY_SIZE);
 427
 428         ret = mv_cesa_ablkcipher_req_init(req, tmpl);
 429         if (ret)
 430                 return ret;
 431
 432         ret = mv_cesa_queue_req(&req->base);
 433         if (mv_cesa_req_needs_cleanup(&req->base, ret))
 434                 mv_cesa_ablkcipher_cleanup(req);
 435
 436         return ret;
 437 }
 438
 439 static int mv_cesa_ecb_des_encrypt(struct ablkcipher_request *req)
 440 {
 441         struct mv_cesa_op_ctx tmpl;
 442
 443         mv_cesa_set_op_cfg(&tmpl,
 444                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 445                            CESA_SA_DESC_CFG_DIR_ENC);
 446
 447         return mv_cesa_des_op(req, &tmpl);
 448 }
 449
 450 static int mv_cesa_ecb_des_decrypt(struct ablkcipher_request *req)
 451 {
 452         struct mv_cesa_op_ctx tmpl;
 453
 454         mv_cesa_set_op_cfg(&tmpl,
 455                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 456                            CESA_SA_DESC_CFG_DIR_DEC);
 457
 458         return mv_cesa_des_op(req, &tmpl);
 459 }
 460
 461 struct crypto_alg mv_cesa_ecb_des_alg = {
 462         .cra_name = "ecb(des)",
 463         .cra_driver_name = "mv-ecb-des",
 464         .cra_priority = 300,
 465         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 466                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 467         .cra_blocksize = DES_BLOCK_SIZE,
 468         .cra_ctxsize = sizeof(struct mv_cesa_des_ctx),
 469         .cra_alignmask = 0,
 470         .cra_type = &crypto_ablkcipher_type,
 471         .cra_module = THIS_MODULE,
 472         .cra_init = mv_cesa_ablkcipher_cra_init,
 473         .cra_u = {
 474                 .ablkcipher = {
 475                         .min_keysize = DES_KEY_SIZE,
 476                         .max_keysize = DES_KEY_SIZE,
 477                         .setkey = mv_cesa_des_setkey,
 478                         .encrypt = mv_cesa_ecb_des_encrypt,
 479                         .decrypt = mv_cesa_ecb_des_decrypt,
 480                 },
 481         },
 482 };
 483
 484 static int mv_cesa_cbc_des_op(struct ablkcipher_request *req,
 485                               struct mv_cesa_op_ctx *tmpl)
 486 {
 487         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTCM_CBC,
 488                               CESA_SA_DESC_CFG_CRYPTCM_MSK);
 489
 490         memcpy(tmpl->ctx.blkcipher.iv, req->info, DES_BLOCK_SIZE);
 491
 492         return mv_cesa_des_op(req, tmpl);
 493 }
 494
 495 static int mv_cesa_cbc_des_encrypt(struct ablkcipher_request *req)
 496 {
 497         struct mv_cesa_op_ctx tmpl;
 498
 499         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_ENC);
 500
 501         return mv_cesa_cbc_des_op(req, &tmpl);
 502 }
 503
 504 static int mv_cesa_cbc_des_decrypt(struct ablkcipher_request *req)
 505 {
 506         struct mv_cesa_op_ctx tmpl;
 507
 508         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_DEC);
 509
 510         return mv_cesa_cbc_des_op(req, &tmpl);
 511 }
 512
 513 struct crypto_alg mv_cesa_cbc_des_alg = {
 514         .cra_name = "cbc(des)",
 515         .cra_driver_name = "mv-cbc-des",
 516         .cra_priority = 300,
 517         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 518                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 519         .cra_blocksize = DES_BLOCK_SIZE,
 520         .cra_ctxsize = sizeof(struct mv_cesa_des_ctx),
 521         .cra_alignmask = 0,
 522         .cra_type = &crypto_ablkcipher_type,
 523         .cra_module = THIS_MODULE,
 524         .cra_init = mv_cesa_ablkcipher_cra_init,
 525         .cra_u = {
 526                 .ablkcipher = {
 527                         .min_keysize = DES_KEY_SIZE,
 528                         .max_keysize = DES_KEY_SIZE,
 529                         .ivsize      = DES_BLOCK_SIZE,
 530                         .setkey = mv_cesa_des_setkey,
 531                         .encrypt = mv_cesa_cbc_des_encrypt,
 532                         .decrypt = mv_cesa_cbc_des_decrypt,
 533                 },
 534         },
 535 };
 536
 537 static int mv_cesa_des3_op(struct ablkcipher_request *req,
 538                            struct mv_cesa_op_ctx *tmpl)
 539 {
 540         struct mv_cesa_des3_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 541         int ret;
 542
 543         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTM_3DES,
 544                               CESA_SA_DESC_CFG_CRYPTM_MSK);
 545
 546         memcpy(tmpl->ctx.blkcipher.key, ctx->key, DES3_EDE_KEY_SIZE);
 547
 548         ret = mv_cesa_ablkcipher_req_init(req, tmpl);
 549         if (ret)
 550                 return ret;
 551
 552         ret = mv_cesa_queue_req(&req->base);
 553         if (mv_cesa_req_needs_cleanup(&req->base, ret))
 554                 mv_cesa_ablkcipher_cleanup(req);
 555
 556         return ret;
 557 }
 558
 559 static int mv_cesa_ecb_des3_ede_encrypt(struct ablkcipher_request *req)
 560 {
 561         struct mv_cesa_op_ctx tmpl;
 562
 563         mv_cesa_set_op_cfg(&tmpl,
 564                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 565                            CESA_SA_DESC_CFG_3DES_EDE |
 566                            CESA_SA_DESC_CFG_DIR_ENC);
 567
 568         return mv_cesa_des3_op(req, &tmpl);
 569 }
 570
 571 static int mv_cesa_ecb_des3_ede_decrypt(struct ablkcipher_request *req)
 572 {
 573         struct mv_cesa_op_ctx tmpl;
 574
 575         mv_cesa_set_op_cfg(&tmpl,
 576                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 577                            CESA_SA_DESC_CFG_3DES_EDE |
 578                            CESA_SA_DESC_CFG_DIR_DEC);
 579
 580         return mv_cesa_des3_op(req, &tmpl);
 581 }
 582
 583 struct crypto_alg mv_cesa_ecb_des3_ede_alg = {
 584         .cra_name = "ecb(des3_ede)",
 585         .cra_driver_name = "mv-ecb-des3-ede",
 586         .cra_priority = 300,
 587         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 588                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 589         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
 590         .cra_ctxsize = sizeof(struct mv_cesa_des3_ctx),
 591         .cra_alignmask = 0,
 592         .cra_type = &crypto_ablkcipher_type,
 593         .cra_module = THIS_MODULE,
 594         .cra_init = mv_cesa_ablkcipher_cra_init,
 595         .cra_u = {
 596                 .ablkcipher = {
 597                         .min_keysize = DES3_EDE_KEY_SIZE,
 598                         .max_keysize = DES3_EDE_KEY_SIZE,
 599                         .ivsize      = DES3_EDE_BLOCK_SIZE,
 600                         .setkey = mv_cesa_des3_ede_setkey,
 601                         .encrypt = mv_cesa_ecb_des3_ede_encrypt,
 602                         .decrypt = mv_cesa_ecb_des3_ede_decrypt,
 603                 },
 604         },
 605 };
 606
 607 static int mv_cesa_cbc_des3_op(struct ablkcipher_request *req,
 608                                struct mv_cesa_op_ctx *tmpl)
 609 {
 610         memcpy(tmpl->ctx.blkcipher.iv, req->info, DES3_EDE_BLOCK_SIZE);
 611
 612         return mv_cesa_des3_op(req, tmpl);
 613 }
 614
 615 static int mv_cesa_cbc_des3_ede_encrypt(struct ablkcipher_request *req)
 616 {
 617         struct mv_cesa_op_ctx tmpl;
 618
 619         mv_cesa_set_op_cfg(&tmpl,
 620                            CESA_SA_DESC_CFG_CRYPTCM_CBC |
 621                            CESA_SA_DESC_CFG_3DES_EDE |
 622                            CESA_SA_DESC_CFG_DIR_ENC);
 623
 624         return mv_cesa_cbc_des3_op(req, &tmpl);
 625 }
 626
 627 static int mv_cesa_cbc_des3_ede_decrypt(struct ablkcipher_request *req)
 628 {
 629         struct mv_cesa_op_ctx tmpl;
 630
 631         mv_cesa_set_op_cfg(&tmpl,
 632                            CESA_SA_DESC_CFG_CRYPTCM_CBC |
 633                            CESA_SA_DESC_CFG_3DES_EDE |
 634                            CESA_SA_DESC_CFG_DIR_DEC);
 635
 636         return mv_cesa_cbc_des3_op(req, &tmpl);
 637 }
 638
 639 struct crypto_alg mv_cesa_cbc_des3_ede_alg = {
 640         .cra_name = "cbc(des3_ede)",
 641         .cra_driver_name = "mv-cbc-des3-ede",
 642         .cra_priority = 300,
 643         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 644                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 645         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
 646         .cra_ctxsize = sizeof(struct mv_cesa_des3_ctx),
 647         .cra_alignmask = 0,
 648         .cra_type = &crypto_ablkcipher_type,
 649         .cra_module = THIS_MODULE,
 650         .cra_init = mv_cesa_ablkcipher_cra_init,
 651         .cra_u = {
 652                 .ablkcipher = {
 653                         .min_keysize = DES3_EDE_KEY_SIZE,
 654                         .max_keysize = DES3_EDE_KEY_SIZE,
 655                         .ivsize      = DES3_EDE_BLOCK_SIZE,
 656                         .setkey = mv_cesa_des3_ede_setkey,
 657                         .encrypt = mv_cesa_cbc_des3_ede_encrypt,
 658                         .decrypt = mv_cesa_cbc_des3_ede_decrypt,
 659                 },
 660         },
 661 };
 662
 663 static int mv_cesa_aes_op(struct ablkcipher_request *req,
 664                           struct mv_cesa_op_ctx *tmpl)
 665 {
 666         struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 667         int ret, i;
 668         u32 *key;
 669         u32 cfg;
 670
 671         cfg = CESA_SA_DESC_CFG_CRYPTM_AES;
 672
 673         if (mv_cesa_get_op_cfg(tmpl) & CESA_SA_DESC_CFG_DIR_DEC)
 674                 key = ctx->aes.key_dec;
 675         else
 676                 key = ctx->aes.key_enc;
 677
 678         for (i = 0; i < ctx->aes.key_length / sizeof(u32); i++)
 679                 tmpl->ctx.blkcipher.key[i] = cpu_to_le32(key[i]);
 680
 681         if (ctx->aes.key_length == 24)
 682                 cfg |= CESA_SA_DESC_CFG_AES_LEN_192;
 683         else if (ctx->aes.key_length == 32)
 684                 cfg |= CESA_SA_DESC_CFG_AES_LEN_256;
 685
 686         mv_cesa_update_op_cfg(tmpl, cfg,
 687                               CESA_SA_DESC_CFG_CRYPTM_MSK |
 688                               CESA_SA_DESC_CFG_AES_LEN_MSK);
 689
 690         ret = mv_cesa_ablkcipher_req_init(req, tmpl);
 691         if (ret)
 692                 return ret;
 693
 694         ret = mv_cesa_queue_req(&req->base);
 695         if (mv_cesa_req_needs_cleanup(&req->base, ret))
 696                 mv_cesa_ablkcipher_cleanup(req);
 697
 698         return ret;
 699 }
 700
 701 static int mv_cesa_ecb_aes_encrypt(struct ablkcipher_request *req)
 702 {
 703         struct mv_cesa_op_ctx tmpl;
 704
 705         mv_cesa_set_op_cfg(&tmpl,
 706                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 707                            CESA_SA_DESC_CFG_DIR_ENC);
 708
 709         return mv_cesa_aes_op(req, &tmpl);
 710 }
 711
 712 static int mv_cesa_ecb_aes_decrypt(struct ablkcipher_request *req)
 713 {
 714         struct mv_cesa_op_ctx tmpl;
 715
 716         mv_cesa_set_op_cfg(&tmpl,
 717                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 718                            CESA_SA_DESC_CFG_DIR_DEC);
 719
 720         return mv_cesa_aes_op(req, &tmpl);
 721 }
 722
 723 struct crypto_alg mv_cesa_ecb_aes_alg = {
 724         .cra_name = "ecb(aes)",
 725         .cra_driver_name = "mv-ecb-aes",
 726         .cra_priority = 300,
 727         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 728                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 729         .cra_blocksize = AES_BLOCK_SIZE,
 730         .cra_ctxsize = sizeof(struct mv_cesa_aes_ctx),
 731         .cra_alignmask = 0,
 732         .cra_type = &crypto_ablkcipher_type,
 733         .cra_module = THIS_MODULE,
 734         .cra_init = mv_cesa_ablkcipher_cra_init,
 735         .cra_u = {
 736                 .ablkcipher = {
 737                         .min_keysize = AES_MIN_KEY_SIZE,
 738                         .max_keysize = AES_MAX_KEY_SIZE,
 739                         .setkey = mv_cesa_aes_setkey,
 740                         .encrypt = mv_cesa_ecb_aes_encrypt,
 741                         .decrypt = mv_cesa_ecb_aes_decrypt,
 742                 },
 743         },
 744 };
 745
 746 static int mv_cesa_cbc_aes_op(struct ablkcipher_request *req,
 747                               struct mv_cesa_op_ctx *tmpl)
 748 {
 749         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTCM_CBC,
 750                               CESA_SA_DESC_CFG_CRYPTCM_MSK);
 751         memcpy(tmpl->ctx.blkcipher.iv, req->info, AES_BLOCK_SIZE);
 752
 753         return mv_cesa_aes_op(req, tmpl);
 754 }
 755
 756 static int mv_cesa_cbc_aes_encrypt(struct ablkcipher_request *req)
 757 {
 758         struct mv_cesa_op_ctx tmpl;
 759
 760         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_ENC);
 761
 762         return mv_cesa_cbc_aes_op(req, &tmpl);
 763 }
 764
 765 static int mv_cesa_cbc_aes_decrypt(struct ablkcipher_request *req)
 766 {
 767         struct mv_cesa_op_ctx tmpl;
 768
 769         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_DEC);
 770
 771         return mv_cesa_cbc_aes_op(req, &tmpl);
 772 }
 773
 774 struct crypto_alg mv_cesa_cbc_aes_alg = {
 775         .cra_name = "cbc(aes)",
 776         .cra_driver_name = "mv-cbc-aes",
 777         .cra_priority = 300,
 778         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 779                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 780         .cra_blocksize = AES_BLOCK_SIZE,
 781         .cra_ctxsize = sizeof(struct mv_cesa_aes_ctx),
 782         .cra_alignmask = 0,
 783         .cra_type = &crypto_ablkcipher_type,
 784         .cra_module = THIS_MODULE,
 785         .cra_init = mv_cesa_ablkcipher_cra_init,
 786         .cra_u = {
 787                 .ablkcipher = {
 788                         .min_keysize = AES_MIN_KEY_SIZE,
 789                         .max_keysize = AES_MAX_KEY_SIZE,
 790                         .ivsize = AES_BLOCK_SIZE,
 791                         .setkey = mv_cesa_aes_setkey,
 792                         .encrypt = mv_cesa_cbc_aes_encrypt,
 793                         .decrypt = mv_cesa_cbc_aes_decrypt,
 794                 },
 795         },
 796 };