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_toio(engine->sram, &sreq->op, sizeof(sreq->op));
 102                 sreq->skip_ctx = true;
 103         } else {
 104                 memcpy_toio(engine->sram, &sreq->op, sizeof(sreq->op.desc));
 105         }
 106
 107         mv_cesa_set_int_mask(engine, CESA_SA_INT_ACCEL0_DONE);
 108         writel_relaxed(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_fromio(ablkreq->info,
 149                       engine->sram + CESA_SA_CRYPT_IV_SRAM_OFFSET,
 150                       crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(ablkreq)));
 151
 152         return 0;
 153 }
 154
 155 static void mv_cesa_ablkcipher_step(struct crypto_async_request *req)
 156 {
 157         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 158         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
 159
 160         if (creq->req.base.type == CESA_DMA_REQ)
 161                 mv_cesa_dma_step(&creq->req.dma);
 162         else
 163                 mv_cesa_ablkcipher_std_step(ablkreq);
 164 }
 165
 166 static inline void
 167 mv_cesa_ablkcipher_dma_prepare(struct ablkcipher_request *req)
 168 {
 169         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 170         struct mv_cesa_tdma_req *dreq = &creq->req.dma;
 171
 172         mv_cesa_dma_prepare(dreq, dreq->base.engine);
 173 }
 174
 175 static inline void
 176 mv_cesa_ablkcipher_std_prepare(struct ablkcipher_request *req)
 177 {
 178         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 179         struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
 180         struct mv_cesa_engine *engine = sreq->base.engine;
 181
 182         sreq->size = 0;
 183         sreq->offset = 0;
 184         mv_cesa_adjust_op(engine, &sreq->op);
 185         memcpy_toio(engine->sram, &sreq->op, sizeof(sreq->op));
 186 }
 187
 188 static inline void mv_cesa_ablkcipher_prepare(struct crypto_async_request *req,
 189                                               struct mv_cesa_engine *engine)
 190 {
 191         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 192         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
 193         creq->req.base.engine = engine;
 194
 195         if (creq->req.base.type == CESA_DMA_REQ)
 196                 mv_cesa_ablkcipher_dma_prepare(ablkreq);
 197         else
 198                 mv_cesa_ablkcipher_std_prepare(ablkreq);
 199 }
 200
 201 static inline void
 202 mv_cesa_ablkcipher_req_cleanup(struct crypto_async_request *req)
 203 {
 204         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 205
 206         mv_cesa_ablkcipher_cleanup(ablkreq);
 207 }
 208
 209 static const struct mv_cesa_req_ops mv_cesa_ablkcipher_req_ops = {
 210         .step = mv_cesa_ablkcipher_step,
 211         .process = mv_cesa_ablkcipher_process,
 212         .prepare = mv_cesa_ablkcipher_prepare,
 213         .cleanup = mv_cesa_ablkcipher_req_cleanup,
 214 };
 215
 216 static int mv_cesa_ablkcipher_cra_init(struct crypto_tfm *tfm)
 217 {
 218         struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 219
 220         ctx->base.ops = &mv_cesa_ablkcipher_req_ops;
 221
 222         tfm->crt_ablkcipher.reqsize = sizeof(struct mv_cesa_ablkcipher_req);
 223
 224         return 0;
 225 }
 226
 227 static int mv_cesa_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
 228                               unsigned int len)
 229 {
 230         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 231         struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 232         int remaining;
 233         int offset;
 234         int ret;
 235         int i;
 236
 237         ret = crypto_aes_expand_key(&ctx->aes, key, len);
 238         if (ret) {
 239                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
 240                 return ret;
 241         }
 242
 243         remaining = (ctx->aes.key_length - 16) / 4;
 244         offset = ctx->aes.key_length + 24 - remaining;
 245         for (i = 0; i < remaining; i++)
 246                 ctx->aes.key_dec[4 + i] =
 247                         cpu_to_le32(ctx->aes.key_enc[offset + i]);
 248
 249         return 0;
 250 }
 251
 252 static int mv_cesa_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
 253                               unsigned int len)
 254 {
 255         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 256         struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(tfm);
 257         u32 tmp[DES_EXPKEY_WORDS];
 258         int ret;
 259
 260         if (len != DES_KEY_SIZE) {
 261                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
 262                 return -EINVAL;
 263         }
 264
 265         ret = des_ekey(tmp, key);
 266         if (!ret && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
 267                 tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
 268                 return -EINVAL;
 269         }
 270
 271         memcpy(ctx->key, key, DES_KEY_SIZE);
 272
 273         return 0;
 274 }
 275
 276 static int mv_cesa_des3_ede_setkey(struct crypto_ablkcipher *cipher,
 277                                    const u8 *key, unsigned int len)
 278 {
 279         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 280         struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(tfm);
 281
 282         if (len != DES3_EDE_KEY_SIZE) {
 283                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
 284                 return -EINVAL;
 285         }
 286
 287         memcpy(ctx->key, key, DES3_EDE_KEY_SIZE);
 288
 289         return 0;
 290 }
 291
 292 static int mv_cesa_ablkcipher_dma_req_init(struct ablkcipher_request *req,
 293                                 const struct mv_cesa_op_ctx *op_templ)
 294 {
 295         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 296         gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
 297                       GFP_KERNEL : GFP_ATOMIC;
 298         struct mv_cesa_tdma_req *dreq = &creq->req.dma;
 299         struct mv_cesa_ablkcipher_dma_iter iter;
 300         struct mv_cesa_tdma_chain chain;
 301         bool skip_ctx = false;
 302         int ret;
 303
 304         dreq->base.type = CESA_DMA_REQ;
 305         dreq->chain.first = NULL;
 306         dreq->chain.last = NULL;
 307
 308         if (req->src != req->dst) {
 309                 ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
 310                                  DMA_TO_DEVICE);
 311                 if (!ret)
 312                         return -ENOMEM;
 313
 314                 ret = dma_map_sg(cesa_dev->dev, req->dst, creq->dst_nents,
 315                                  DMA_FROM_DEVICE);
 316                 if (!ret) {
 317                         ret = -ENOMEM;
 318                         goto err_unmap_src;
 319                 }
 320         } else {
 321                 ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
 322                                  DMA_BIDIRECTIONAL);
 323                 if (!ret)
 324                         return -ENOMEM;
 325         }
 326
 327         mv_cesa_tdma_desc_iter_init(&chain);
 328         mv_cesa_ablkcipher_req_iter_init(&iter, req);
 329
 330         do {
 331                 struct mv_cesa_op_ctx *op;
 332
 333                 op = mv_cesa_dma_add_op(&chain, op_templ, skip_ctx, flags);
 334                 if (IS_ERR(op)) {
 335                         ret = PTR_ERR(op);
 336                         goto err_free_tdma;
 337                 }
 338                 skip_ctx = true;
 339
 340                 mv_cesa_set_crypt_op_len(op, iter.base.op_len);
 341
 342                 /* Add input transfers */
 343                 ret = mv_cesa_dma_add_op_transfers(&chain, &iter.base,
 344                                                    &iter.src, flags);
 345                 if (ret)
 346                         goto err_free_tdma;
 347
 348                 /* Add dummy desc to launch the crypto operation */
 349                 ret = mv_cesa_dma_add_dummy_launch(&chain, flags);
 350                 if (ret)
 351                         goto err_free_tdma;
 352
 353                 /* Add output transfers */
 354                 ret = mv_cesa_dma_add_op_transfers(&chain, &iter.base,
 355                                                    &iter.dst, flags);
 356                 if (ret)
 357                         goto err_free_tdma;
 358
 359         } while (mv_cesa_ablkcipher_req_iter_next_op(&iter));
 360
 361         dreq->chain = chain;
 362
 363         return 0;
 364
 365 err_free_tdma:
 366         mv_cesa_dma_cleanup(dreq);
 367         if (req->dst != req->src)
 368                 dma_unmap_sg(cesa_dev->dev, req->dst, creq->dst_nents,
 369                              DMA_FROM_DEVICE);
 370
 371 err_unmap_src:
 372         dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents,
 373                      req->dst != req->src ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL);
 374
 375         return ret;
 376 }
 377
 378 static inline int
 379 mv_cesa_ablkcipher_std_req_init(struct ablkcipher_request *req,
 380                                 const struct mv_cesa_op_ctx *op_templ)
 381 {
 382         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 383         struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
 384
 385         sreq->base.type = CESA_STD_REQ;
 386         sreq->op = *op_templ;
 387         sreq->skip_ctx = false;
 388
 389         return 0;
 390 }
 391
 392 static int mv_cesa_ablkcipher_req_init(struct ablkcipher_request *req,
 393                                        struct mv_cesa_op_ctx *tmpl)
 394 {
 395         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 396         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 397         unsigned int blksize = crypto_ablkcipher_blocksize(tfm);
 398         int ret;
 399
 400         if (!IS_ALIGNED(req->nbytes, blksize))
 401                 return -EINVAL;
 402
 403         creq->src_nents = sg_nents_for_len(req->src, req->nbytes);
 404         creq->dst_nents = sg_nents_for_len(req->dst, req->nbytes);
 405
 406         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_OP_CRYPT_ONLY,
 407                               CESA_SA_DESC_CFG_OP_MSK);
 408
 409         /* TODO: add a threshold for DMA usage */
 410         if (cesa_dev->caps->has_tdma)
 411                 ret = mv_cesa_ablkcipher_dma_req_init(req, tmpl);
 412         else
 413                 ret = mv_cesa_ablkcipher_std_req_init(req, tmpl);
 414
 415         return ret;
 416 }
 417
 418 static int mv_cesa_des_op(struct ablkcipher_request *req,
 419                           struct mv_cesa_op_ctx *tmpl)
 420 {
 421         struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 422         int ret;
 423
 424         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTM_DES,
 425                               CESA_SA_DESC_CFG_CRYPTM_MSK);
 426
 427         memcpy(tmpl->ctx.blkcipher.key, ctx->key, DES_KEY_SIZE);
 428
 429         ret = mv_cesa_ablkcipher_req_init(req, tmpl);
 430         if (ret)
 431                 return ret;
 432
 433         ret = mv_cesa_queue_req(&req->base);
 434         if (mv_cesa_req_needs_cleanup(&req->base, ret))
 435                 mv_cesa_ablkcipher_cleanup(req);
 436
 437         return ret;
 438 }
 439
 440 static int mv_cesa_ecb_des_encrypt(struct ablkcipher_request *req)
 441 {
 442         struct mv_cesa_op_ctx tmpl;
 443
 444         mv_cesa_set_op_cfg(&tmpl,
 445                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 446                            CESA_SA_DESC_CFG_DIR_ENC);
 447
 448         return mv_cesa_des_op(req, &tmpl);
 449 }
 450
 451 static int mv_cesa_ecb_des_decrypt(struct ablkcipher_request *req)
 452 {
 453         struct mv_cesa_op_ctx tmpl;
 454
 455         mv_cesa_set_op_cfg(&tmpl,
 456                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 457                            CESA_SA_DESC_CFG_DIR_DEC);
 458
 459         return mv_cesa_des_op(req, &tmpl);
 460 }
 461
 462 struct crypto_alg mv_cesa_ecb_des_alg = {
 463         .cra_name = "ecb(des)",
 464         .cra_driver_name = "mv-ecb-des",
 465         .cra_priority = 300,
 466         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 467                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 468         .cra_blocksize = DES_BLOCK_SIZE,
 469         .cra_ctxsize = sizeof(struct mv_cesa_des_ctx),
 470         .cra_alignmask = 0,
 471         .cra_type = &crypto_ablkcipher_type,
 472         .cra_module = THIS_MODULE,
 473         .cra_init = mv_cesa_ablkcipher_cra_init,
 474         .cra_u = {
 475                 .ablkcipher = {
 476                         .min_keysize = DES_KEY_SIZE,
 477                         .max_keysize = DES_KEY_SIZE,
 478                         .setkey = mv_cesa_des_setkey,
 479                         .encrypt = mv_cesa_ecb_des_encrypt,
 480                         .decrypt = mv_cesa_ecb_des_decrypt,
 481                 },
 482         },
 483 };
 484
 485 static int mv_cesa_cbc_des_op(struct ablkcipher_request *req,
 486                               struct mv_cesa_op_ctx *tmpl)
 487 {
 488         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTCM_CBC,
 489                               CESA_SA_DESC_CFG_CRYPTCM_MSK);
 490
 491         memcpy(tmpl->ctx.blkcipher.iv, req->info, DES_BLOCK_SIZE);
 492
 493         return mv_cesa_des_op(req, tmpl);
 494 }
 495
 496 static int mv_cesa_cbc_des_encrypt(struct ablkcipher_request *req)
 497 {
 498         struct mv_cesa_op_ctx tmpl;
 499
 500         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_ENC);
 501
 502         return mv_cesa_cbc_des_op(req, &tmpl);
 503 }
 504
 505 static int mv_cesa_cbc_des_decrypt(struct ablkcipher_request *req)
 506 {
 507         struct mv_cesa_op_ctx tmpl;
 508
 509         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_DEC);
 510
 511         return mv_cesa_cbc_des_op(req, &tmpl);
 512 }
 513
 514 struct crypto_alg mv_cesa_cbc_des_alg = {
 515         .cra_name = "cbc(des)",
 516         .cra_driver_name = "mv-cbc-des",
 517         .cra_priority = 300,
 518         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 519                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 520         .cra_blocksize = DES_BLOCK_SIZE,
 521         .cra_ctxsize = sizeof(struct mv_cesa_des_ctx),
 522         .cra_alignmask = 0,
 523         .cra_type = &crypto_ablkcipher_type,
 524         .cra_module = THIS_MODULE,
 525         .cra_init = mv_cesa_ablkcipher_cra_init,
 526         .cra_u = {
 527                 .ablkcipher = {
 528                         .min_keysize = DES_KEY_SIZE,
 529                         .max_keysize = DES_KEY_SIZE,
 530                         .ivsize      = DES_BLOCK_SIZE,
 531                         .setkey = mv_cesa_des_setkey,
 532                         .encrypt = mv_cesa_cbc_des_encrypt,
 533                         .decrypt = mv_cesa_cbc_des_decrypt,
 534                 },
 535         },
 536 };
 537
 538 static int mv_cesa_des3_op(struct ablkcipher_request *req,
 539                            struct mv_cesa_op_ctx *tmpl)
 540 {
 541         struct mv_cesa_des3_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 542         int ret;
 543
 544         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTM_3DES,
 545                               CESA_SA_DESC_CFG_CRYPTM_MSK);
 546
 547         memcpy(tmpl->ctx.blkcipher.key, ctx->key, DES3_EDE_KEY_SIZE);
 548
 549         ret = mv_cesa_ablkcipher_req_init(req, tmpl);
 550         if (ret)
 551                 return ret;
 552
 553         ret = mv_cesa_queue_req(&req->base);
 554         if (mv_cesa_req_needs_cleanup(&req->base, ret))
 555                 mv_cesa_ablkcipher_cleanup(req);
 556
 557         return ret;
 558 }
 559
 560 static int mv_cesa_ecb_des3_ede_encrypt(struct ablkcipher_request *req)
 561 {
 562         struct mv_cesa_op_ctx tmpl;
 563
 564         mv_cesa_set_op_cfg(&tmpl,
 565                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 566                            CESA_SA_DESC_CFG_3DES_EDE |
 567                            CESA_SA_DESC_CFG_DIR_ENC);
 568
 569         return mv_cesa_des3_op(req, &tmpl);
 570 }
 571
 572 static int mv_cesa_ecb_des3_ede_decrypt(struct ablkcipher_request *req)
 573 {
 574         struct mv_cesa_op_ctx tmpl;
 575
 576         mv_cesa_set_op_cfg(&tmpl,
 577                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 578                            CESA_SA_DESC_CFG_3DES_EDE |
 579                            CESA_SA_DESC_CFG_DIR_DEC);
 580
 581         return mv_cesa_des3_op(req, &tmpl);
 582 }
 583
 584 struct crypto_alg mv_cesa_ecb_des3_ede_alg = {
 585         .cra_name = "ecb(des3_ede)",
 586         .cra_driver_name = "mv-ecb-des3-ede",
 587         .cra_priority = 300,
 588         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 589                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 590         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
 591         .cra_ctxsize = sizeof(struct mv_cesa_des3_ctx),
 592         .cra_alignmask = 0,
 593         .cra_type = &crypto_ablkcipher_type,
 594         .cra_module = THIS_MODULE,
 595         .cra_init = mv_cesa_ablkcipher_cra_init,
 596         .cra_u = {
 597                 .ablkcipher = {
 598                         .min_keysize = DES3_EDE_KEY_SIZE,
 599                         .max_keysize = DES3_EDE_KEY_SIZE,
 600                         .ivsize      = DES3_EDE_BLOCK_SIZE,
 601                         .setkey = mv_cesa_des3_ede_setkey,
 602                         .encrypt = mv_cesa_ecb_des3_ede_encrypt,
 603                         .decrypt = mv_cesa_ecb_des3_ede_decrypt,
 604                 },
 605         },
 606 };
 607
 608 static int mv_cesa_cbc_des3_op(struct ablkcipher_request *req,
 609                                struct mv_cesa_op_ctx *tmpl)
 610 {
 611         memcpy(tmpl->ctx.blkcipher.iv, req->info, DES3_EDE_BLOCK_SIZE);
 612
 613         return mv_cesa_des3_op(req, tmpl);
 614 }
 615
 616 static int mv_cesa_cbc_des3_ede_encrypt(struct ablkcipher_request *req)
 617 {
 618         struct mv_cesa_op_ctx tmpl;
 619
 620         mv_cesa_set_op_cfg(&tmpl,
 621                            CESA_SA_DESC_CFG_CRYPTCM_CBC |
 622                            CESA_SA_DESC_CFG_3DES_EDE |
 623                            CESA_SA_DESC_CFG_DIR_ENC);
 624
 625         return mv_cesa_cbc_des3_op(req, &tmpl);
 626 }
 627
 628 static int mv_cesa_cbc_des3_ede_decrypt(struct ablkcipher_request *req)
 629 {
 630         struct mv_cesa_op_ctx tmpl;
 631
 632         mv_cesa_set_op_cfg(&tmpl,
 633                            CESA_SA_DESC_CFG_CRYPTCM_CBC |
 634                            CESA_SA_DESC_CFG_3DES_EDE |
 635                            CESA_SA_DESC_CFG_DIR_DEC);
 636
 637         return mv_cesa_cbc_des3_op(req, &tmpl);
 638 }
 639
 640 struct crypto_alg mv_cesa_cbc_des3_ede_alg = {
 641         .cra_name = "cbc(des3_ede)",
 642         .cra_driver_name = "mv-cbc-des3-ede",
 643         .cra_priority = 300,
 644         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 645                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 646         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
 647         .cra_ctxsize = sizeof(struct mv_cesa_des3_ctx),
 648         .cra_alignmask = 0,
 649         .cra_type = &crypto_ablkcipher_type,
 650         .cra_module = THIS_MODULE,
 651         .cra_init = mv_cesa_ablkcipher_cra_init,
 652         .cra_u = {
 653                 .ablkcipher = {
 654                         .min_keysize = DES3_EDE_KEY_SIZE,
 655                         .max_keysize = DES3_EDE_KEY_SIZE,
 656                         .ivsize      = DES3_EDE_BLOCK_SIZE,
 657                         .setkey = mv_cesa_des3_ede_setkey,
 658                         .encrypt = mv_cesa_cbc_des3_ede_encrypt,
 659                         .decrypt = mv_cesa_cbc_des3_ede_decrypt,
 660                 },
 661         },
 662 };
 663
 664 static int mv_cesa_aes_op(struct ablkcipher_request *req,
 665                           struct mv_cesa_op_ctx *tmpl)
 666 {
 667         struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 668         int ret, i;
 669         u32 *key;
 670         u32 cfg;
 671
 672         cfg = CESA_SA_DESC_CFG_CRYPTM_AES;
 673
 674         if (mv_cesa_get_op_cfg(tmpl) & CESA_SA_DESC_CFG_DIR_DEC)
 675                 key = ctx->aes.key_dec;
 676         else
 677                 key = ctx->aes.key_enc;
 678
 679         for (i = 0; i < ctx->aes.key_length / sizeof(u32); i++)
 680                 tmpl->ctx.blkcipher.key[i] = cpu_to_le32(key[i]);
 681
 682         if (ctx->aes.key_length == 24)
 683                 cfg |= CESA_SA_DESC_CFG_AES_LEN_192;
 684         else if (ctx->aes.key_length == 32)
 685                 cfg |= CESA_SA_DESC_CFG_AES_LEN_256;
 686
 687         mv_cesa_update_op_cfg(tmpl, cfg,
 688                               CESA_SA_DESC_CFG_CRYPTM_MSK |
 689                               CESA_SA_DESC_CFG_AES_LEN_MSK);
 690
 691         ret = mv_cesa_ablkcipher_req_init(req, tmpl);
 692         if (ret)
 693                 return ret;
 694
 695         ret = mv_cesa_queue_req(&req->base);
 696         if (mv_cesa_req_needs_cleanup(&req->base, ret))
 697                 mv_cesa_ablkcipher_cleanup(req);
 698
 699         return ret;
 700 }
 701
 702 static int mv_cesa_ecb_aes_encrypt(struct ablkcipher_request *req)
 703 {
 704         struct mv_cesa_op_ctx tmpl;
 705
 706         mv_cesa_set_op_cfg(&tmpl,
 707                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 708                            CESA_SA_DESC_CFG_DIR_ENC);
 709
 710         return mv_cesa_aes_op(req, &tmpl);
 711 }
 712
 713 static int mv_cesa_ecb_aes_decrypt(struct ablkcipher_request *req)
 714 {
 715         struct mv_cesa_op_ctx tmpl;
 716
 717         mv_cesa_set_op_cfg(&tmpl,
 718                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 719                            CESA_SA_DESC_CFG_DIR_DEC);
 720
 721         return mv_cesa_aes_op(req, &tmpl);
 722 }
 723
 724 struct crypto_alg mv_cesa_ecb_aes_alg = {
 725         .cra_name = "ecb(aes)",
 726         .cra_driver_name = "mv-ecb-aes",
 727         .cra_priority = 300,
 728         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 729                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 730         .cra_blocksize = AES_BLOCK_SIZE,
 731         .cra_ctxsize = sizeof(struct mv_cesa_aes_ctx),
 732         .cra_alignmask = 0,
 733         .cra_type = &crypto_ablkcipher_type,
 734         .cra_module = THIS_MODULE,
 735         .cra_init = mv_cesa_ablkcipher_cra_init,
 736         .cra_u = {
 737                 .ablkcipher = {
 738                         .min_keysize = AES_MIN_KEY_SIZE,
 739                         .max_keysize = AES_MAX_KEY_SIZE,
 740                         .setkey = mv_cesa_aes_setkey,
 741                         .encrypt = mv_cesa_ecb_aes_encrypt,
 742                         .decrypt = mv_cesa_ecb_aes_decrypt,
 743                 },
 744         },
 745 };
 746
 747 static int mv_cesa_cbc_aes_op(struct ablkcipher_request *req,
 748                               struct mv_cesa_op_ctx *tmpl)
 749 {
 750         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTCM_CBC,
 751                               CESA_SA_DESC_CFG_CRYPTCM_MSK);
 752         memcpy(tmpl->ctx.blkcipher.iv, req->info, AES_BLOCK_SIZE);
 753
 754         return mv_cesa_aes_op(req, tmpl);
 755 }
 756
 757 static int mv_cesa_cbc_aes_encrypt(struct ablkcipher_request *req)
 758 {
 759         struct mv_cesa_op_ctx tmpl;
 760
 761         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_ENC);
 762
 763         return mv_cesa_cbc_aes_op(req, &tmpl);
 764 }
 765
 766 static int mv_cesa_cbc_aes_decrypt(struct ablkcipher_request *req)
 767 {
 768         struct mv_cesa_op_ctx tmpl;
 769
 770         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_DEC);
 771
 772         return mv_cesa_cbc_aes_op(req, &tmpl);
 773 }
 774
 775 struct crypto_alg mv_cesa_cbc_aes_alg = {
 776         .cra_name = "cbc(aes)",
 777         .cra_driver_name = "mv-cbc-aes",
 778         .cra_priority = 300,
 779         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 780                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 781         .cra_blocksize = AES_BLOCK_SIZE,
 782         .cra_ctxsize = sizeof(struct mv_cesa_aes_ctx),
 783         .cra_alignmask = 0,
 784         .cra_type = &crypto_ablkcipher_type,
 785         .cra_module = THIS_MODULE,
 786         .cra_init = mv_cesa_ablkcipher_cra_init,
 787         .cra_u = {
 788                 .ablkcipher = {
 789                         .min_keysize = AES_MIN_KEY_SIZE,
 790                         .max_keysize = AES_MAX_KEY_SIZE,
 791                         .ivsize = AES_BLOCK_SIZE,
 792                         .setkey = mv_cesa_aes_setkey,
 793                         .encrypt = mv_cesa_cbc_aes_encrypt,
 794                         .decrypt = mv_cesa_cbc_aes_decrypt,
 795                 },
 796         },
 797 };