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->base);
  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 (mv_cesa_req_get_type(&creq->base) == 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->std;
  88         struct mv_cesa_engine *engine = creq->base.engine;
  89         size_t  len = min_t(size_t, req->nbytes - sreq->offset,
  90                             CESA_SA_SRAM_PAYLOAD_SIZE);
  91
  92         mv_cesa_adjust_op(engine, &sreq->op);
  93         memcpy_toio(engine->sram, &sreq->op, sizeof(sreq->op));
  94
  95         len = sg_pcopy_to_buffer(req->src, creq->src_nents,
  96                                  engine->sram + CESA_SA_DATA_SRAM_OFFSET,
  97                                  len, sreq->offset);
  98
  99         sreq->size = len;
 100         mv_cesa_set_crypt_op_len(&sreq->op, len);
 101
 102         /* FIXME: only update enc_len field */
 103         if (!sreq->skip_ctx) {
 104                 memcpy_toio(engine->sram, &sreq->op, sizeof(sreq->op));
 105                 sreq->skip_ctx = true;
 106         } else {
 107                 memcpy_toio(engine->sram, &sreq->op, sizeof(sreq->op.desc));
 108         }
 109
 110         mv_cesa_set_int_mask(engine, CESA_SA_INT_ACCEL0_DONE);
 111         writel_relaxed(CESA_SA_CFG_PARA_DIS, engine->regs + CESA_SA_CFG);
 112         BUG_ON(readl(engine->regs + CESA_SA_CMD) &
 113                CESA_SA_CMD_EN_CESA_SA_ACCL0);
 114         writel(CESA_SA_CMD_EN_CESA_SA_ACCL0, engine->regs + CESA_SA_CMD);
 115 }
 116
 117 static int mv_cesa_ablkcipher_std_process(struct ablkcipher_request *req,
 118                                           u32 status)
 119 {
 120         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 121         struct mv_cesa_ablkcipher_std_req *sreq = &creq->std;
 122         struct mv_cesa_engine *engine = creq->base.engine;
 123         size_t len;
 124
 125         len = sg_pcopy_from_buffer(req->dst, creq->dst_nents,
 126                                    engine->sram + CESA_SA_DATA_SRAM_OFFSET,
 127                                    sreq->size, sreq->offset);
 128
 129         sreq->offset += len;
 130         if (sreq->offset < req->nbytes)
 131                 return -EINPROGRESS;
 132
 133         return 0;
 134 }
 135
 136 static int mv_cesa_ablkcipher_process(struct crypto_async_request *req,
 137                                       u32 status)
 138 {
 139         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 140         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
 141         struct mv_cesa_req *basereq = &creq->base;
 142
 143         if (mv_cesa_req_get_type(basereq) == CESA_STD_REQ)
 144                 return mv_cesa_ablkcipher_std_process(ablkreq, status);
 145
 146         return mv_cesa_dma_process(basereq, status);
 147 }
 148
 149 static void mv_cesa_ablkcipher_step(struct crypto_async_request *req)
 150 {
 151         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 152         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
 153
 154         if (mv_cesa_req_get_type(&creq->base) == CESA_DMA_REQ)
 155                 mv_cesa_dma_step(&creq->base);
 156         else
 157                 mv_cesa_ablkcipher_std_step(ablkreq);
 158 }
 159
 160 static inline void
 161 mv_cesa_ablkcipher_dma_prepare(struct ablkcipher_request *req)
 162 {
 163         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 164         struct mv_cesa_req *basereq = &creq->base;
 165
 166         mv_cesa_dma_prepare(basereq, basereq->engine);
 167 }
 168
 169 static inline void
 170 mv_cesa_ablkcipher_std_prepare(struct ablkcipher_request *req)
 171 {
 172         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 173         struct mv_cesa_ablkcipher_std_req *sreq = &creq->std;
 174
 175         sreq->size = 0;
 176         sreq->offset = 0;
 177 }
 178
 179 static inline void mv_cesa_ablkcipher_prepare(struct crypto_async_request *req,
 180                                               struct mv_cesa_engine *engine)
 181 {
 182         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 183         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
 184         creq->base.engine = engine;
 185
 186         if (mv_cesa_req_get_type(&creq->base) == CESA_DMA_REQ)
 187                 mv_cesa_ablkcipher_dma_prepare(ablkreq);
 188         else
 189                 mv_cesa_ablkcipher_std_prepare(ablkreq);
 190 }
 191
 192 static inline void
 193 mv_cesa_ablkcipher_req_cleanup(struct crypto_async_request *req)
 194 {
 195         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 196
 197         mv_cesa_ablkcipher_cleanup(ablkreq);
 198 }
 199
 200 static void
 201 mv_cesa_ablkcipher_complete(struct crypto_async_request *req)
 202 {
 203         struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
 204         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
 205         struct mv_cesa_engine *engine = creq->base.engine;
 206         unsigned int ivsize;
 207
 208         atomic_sub(ablkreq->nbytes, &engine->load);
 209         ivsize = crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(ablkreq));
 210
 211         if (mv_cesa_req_get_type(&creq->base) == CESA_DMA_REQ) {
 212                 struct mv_cesa_req *basereq;
 213
 214                 basereq = &creq->base;
 215                 memcpy(ablkreq->info, basereq->chain.last->op->ctx.blkcipher.iv,
 216                        ivsize);
 217         } else {
 218                 memcpy_fromio(ablkreq->info,
 219                               engine->sram + CESA_SA_CRYPT_IV_SRAM_OFFSET,
 220                               ivsize);
 221         }
 222 }
 223
 224 static const struct mv_cesa_req_ops mv_cesa_ablkcipher_req_ops = {
 225         .step = mv_cesa_ablkcipher_step,
 226         .process = mv_cesa_ablkcipher_process,
 227         .cleanup = mv_cesa_ablkcipher_req_cleanup,
 228         .complete = mv_cesa_ablkcipher_complete,
 229 };
 230
 231 static int mv_cesa_ablkcipher_cra_init(struct crypto_tfm *tfm)
 232 {
 233         struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 234
 235         ctx->base.ops = &mv_cesa_ablkcipher_req_ops;
 236
 237         tfm->crt_ablkcipher.reqsize = sizeof(struct mv_cesa_ablkcipher_req);
 238
 239         return 0;
 240 }
 241
 242 static int mv_cesa_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
 243                               unsigned int len)
 244 {
 245         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 246         struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 247         int remaining;
 248         int offset;
 249         int ret;
 250         int i;
 251
 252         ret = crypto_aes_expand_key(&ctx->aes, key, len);
 253         if (ret) {
 254                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
 255                 return ret;
 256         }
 257
 258         remaining = (ctx->aes.key_length - 16) / 4;
 259         offset = ctx->aes.key_length + 24 - remaining;
 260         for (i = 0; i < remaining; i++)
 261                 ctx->aes.key_dec[4 + i] =
 262                         cpu_to_le32(ctx->aes.key_enc[offset + i]);
 263
 264         return 0;
 265 }
 266
 267 static int mv_cesa_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
 268                               unsigned int len)
 269 {
 270         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 271         struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(tfm);
 272         u32 tmp[DES_EXPKEY_WORDS];
 273         int ret;
 274
 275         if (len != DES_KEY_SIZE) {
 276                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
 277                 return -EINVAL;
 278         }
 279
 280         ret = des_ekey(tmp, key);
 281         if (!ret && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
 282                 tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
 283                 return -EINVAL;
 284         }
 285
 286         memcpy(ctx->key, key, DES_KEY_SIZE);
 287
 288         return 0;
 289 }
 290
 291 static int mv_cesa_des3_ede_setkey(struct crypto_ablkcipher *cipher,
 292                                    const u8 *key, unsigned int len)
 293 {
 294         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 295         struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(tfm);
 296
 297         if (len != DES3_EDE_KEY_SIZE) {
 298                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
 299                 return -EINVAL;
 300         }
 301
 302         memcpy(ctx->key, key, DES3_EDE_KEY_SIZE);
 303
 304         return 0;
 305 }
 306
 307 static int mv_cesa_ablkcipher_dma_req_init(struct ablkcipher_request *req,
 308                                 const struct mv_cesa_op_ctx *op_templ)
 309 {
 310         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 311         gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
 312                       GFP_KERNEL : GFP_ATOMIC;
 313         struct mv_cesa_req *basereq = &creq->base;
 314         struct mv_cesa_ablkcipher_dma_iter iter;
 315         bool skip_ctx = false;
 316         int ret;
 317         unsigned int ivsize;
 318
 319         basereq->chain.first = NULL;
 320         basereq->chain.last = NULL;
 321
 322         if (req->src != req->dst) {
 323                 ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
 324                                  DMA_TO_DEVICE);
 325                 if (!ret)
 326                         return -ENOMEM;
 327
 328                 ret = dma_map_sg(cesa_dev->dev, req->dst, creq->dst_nents,
 329                                  DMA_FROM_DEVICE);
 330                 if (!ret) {
 331                         ret = -ENOMEM;
 332                         goto err_unmap_src;
 333                 }
 334         } else {
 335                 ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
 336                                  DMA_BIDIRECTIONAL);
 337                 if (!ret)
 338                         return -ENOMEM;
 339         }
 340
 341         mv_cesa_tdma_desc_iter_init(&basereq->chain);
 342         mv_cesa_ablkcipher_req_iter_init(&iter, req);
 343
 344         do {
 345                 struct mv_cesa_op_ctx *op;
 346
 347                 op = mv_cesa_dma_add_op(&basereq->chain, op_templ, skip_ctx, flags);
 348                 if (IS_ERR(op)) {
 349                         ret = PTR_ERR(op);
 350                         goto err_free_tdma;
 351                 }
 352                 skip_ctx = true;
 353
 354                 mv_cesa_set_crypt_op_len(op, iter.base.op_len);
 355
 356                 /* Add input transfers */
 357                 ret = mv_cesa_dma_add_op_transfers(&basereq->chain, &iter.base,
 358                                                    &iter.src, flags);
 359                 if (ret)
 360                         goto err_free_tdma;
 361
 362                 /* Add dummy desc to launch the crypto operation */
 363                 ret = mv_cesa_dma_add_dummy_launch(&basereq->chain, flags);
 364                 if (ret)
 365                         goto err_free_tdma;
 366
 367                 /* Add output transfers */
 368                 ret = mv_cesa_dma_add_op_transfers(&basereq->chain, &iter.base,
 369                                                    &iter.dst, flags);
 370                 if (ret)
 371                         goto err_free_tdma;
 372
 373         } while (mv_cesa_ablkcipher_req_iter_next_op(&iter));
 374
 375         /* Add output data for IV */
 376         ivsize = crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(req));
 377         ret = mv_cesa_dma_add_result_op(&basereq->chain, CESA_SA_CFG_SRAM_OFFSET,
 378                                     CESA_SA_DATA_SRAM_OFFSET,
 379                                     CESA_TDMA_SRC_IN_SRAM, flags);
 380
 381         if (ret)
 382                 goto err_free_tdma;
 383
 384         basereq->chain.last->flags |= CESA_TDMA_END_OF_REQ;
 385
 386         return 0;
 387
 388 err_free_tdma:
 389         mv_cesa_dma_cleanup(basereq);
 390         if (req->dst != req->src)
 391                 dma_unmap_sg(cesa_dev->dev, req->dst, creq->dst_nents,
 392                              DMA_FROM_DEVICE);
 393
 394 err_unmap_src:
 395         dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents,
 396                      req->dst != req->src ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL);
 397
 398         return ret;
 399 }
 400
 401 static inline int
 402 mv_cesa_ablkcipher_std_req_init(struct ablkcipher_request *req,
 403                                 const struct mv_cesa_op_ctx *op_templ)
 404 {
 405         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 406         struct mv_cesa_ablkcipher_std_req *sreq = &creq->std;
 407         struct mv_cesa_req *basereq = &creq->base;
 408
 409         sreq->op = *op_templ;
 410         sreq->skip_ctx = false;
 411         basereq->chain.first = NULL;
 412         basereq->chain.last = NULL;
 413
 414         return 0;
 415 }
 416
 417 static int mv_cesa_ablkcipher_req_init(struct ablkcipher_request *req,
 418                                        struct mv_cesa_op_ctx *tmpl)
 419 {
 420         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 421         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 422         unsigned int blksize = crypto_ablkcipher_blocksize(tfm);
 423         int ret;
 424
 425         if (!IS_ALIGNED(req->nbytes, blksize))
 426                 return -EINVAL;
 427
 428         creq->src_nents = sg_nents_for_len(req->src, req->nbytes);
 429         if (creq->src_nents < 0) {
 430                 dev_err(cesa_dev->dev, "Invalid number of src SG");
 431                 return creq->src_nents;
 432         }
 433         creq->dst_nents = sg_nents_for_len(req->dst, req->nbytes);
 434         if (creq->dst_nents < 0) {
 435                 dev_err(cesa_dev->dev, "Invalid number of dst SG");
 436                 return creq->dst_nents;
 437         }
 438
 439         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_OP_CRYPT_ONLY,
 440                               CESA_SA_DESC_CFG_OP_MSK);
 441
 442         if (cesa_dev->caps->has_tdma)
 443                 ret = mv_cesa_ablkcipher_dma_req_init(req, tmpl);
 444         else
 445                 ret = mv_cesa_ablkcipher_std_req_init(req, tmpl);
 446
 447         return ret;
 448 }
 449
 450 static int mv_cesa_ablkcipher_queue_req(struct ablkcipher_request *req,
 451                                         struct mv_cesa_op_ctx *tmpl)
 452 {
 453         int ret;
 454         struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
 455         struct mv_cesa_engine *engine;
 456
 457         ret = mv_cesa_ablkcipher_req_init(req, tmpl);
 458         if (ret)
 459                 return ret;
 460
 461         engine = mv_cesa_select_engine(req->nbytes);
 462         mv_cesa_ablkcipher_prepare(&req->base, engine);
 463
 464         ret = mv_cesa_queue_req(&req->base, &creq->base);
 465
 466         if (mv_cesa_req_needs_cleanup(&req->base, ret))
 467                 mv_cesa_ablkcipher_cleanup(req);
 468
 469         return ret;
 470 }
 471
 472 static int mv_cesa_des_op(struct ablkcipher_request *req,
 473                           struct mv_cesa_op_ctx *tmpl)
 474 {
 475         struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 476
 477         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTM_DES,
 478                               CESA_SA_DESC_CFG_CRYPTM_MSK);
 479
 480         memcpy(tmpl->ctx.blkcipher.key, ctx->key, DES_KEY_SIZE);
 481
 482         return mv_cesa_ablkcipher_queue_req(req, tmpl);
 483 }
 484
 485 static int mv_cesa_ecb_des_encrypt(struct ablkcipher_request *req)
 486 {
 487         struct mv_cesa_op_ctx tmpl;
 488
 489         mv_cesa_set_op_cfg(&tmpl,
 490                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 491                            CESA_SA_DESC_CFG_DIR_ENC);
 492
 493         return mv_cesa_des_op(req, &tmpl);
 494 }
 495
 496 static int mv_cesa_ecb_des_decrypt(struct ablkcipher_request *req)
 497 {
 498         struct mv_cesa_op_ctx tmpl;
 499
 500         mv_cesa_set_op_cfg(&tmpl,
 501                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 502                            CESA_SA_DESC_CFG_DIR_DEC);
 503
 504         return mv_cesa_des_op(req, &tmpl);
 505 }
 506
 507 struct crypto_alg mv_cesa_ecb_des_alg = {
 508         .cra_name = "ecb(des)",
 509         .cra_driver_name = "mv-ecb-des",
 510         .cra_priority = 300,
 511         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 512                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 513         .cra_blocksize = DES_BLOCK_SIZE,
 514         .cra_ctxsize = sizeof(struct mv_cesa_des_ctx),
 515         .cra_alignmask = 0,
 516         .cra_type = &crypto_ablkcipher_type,
 517         .cra_module = THIS_MODULE,
 518         .cra_init = mv_cesa_ablkcipher_cra_init,
 519         .cra_u = {
 520                 .ablkcipher = {
 521                         .min_keysize = DES_KEY_SIZE,
 522                         .max_keysize = DES_KEY_SIZE,
 523                         .setkey = mv_cesa_des_setkey,
 524                         .encrypt = mv_cesa_ecb_des_encrypt,
 525                         .decrypt = mv_cesa_ecb_des_decrypt,
 526                 },
 527         },
 528 };
 529
 530 static int mv_cesa_cbc_des_op(struct ablkcipher_request *req,
 531                               struct mv_cesa_op_ctx *tmpl)
 532 {
 533         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTCM_CBC,
 534                               CESA_SA_DESC_CFG_CRYPTCM_MSK);
 535
 536         memcpy(tmpl->ctx.blkcipher.iv, req->info, DES_BLOCK_SIZE);
 537
 538         return mv_cesa_des_op(req, tmpl);
 539 }
 540
 541 static int mv_cesa_cbc_des_encrypt(struct ablkcipher_request *req)
 542 {
 543         struct mv_cesa_op_ctx tmpl;
 544
 545         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_ENC);
 546
 547         return mv_cesa_cbc_des_op(req, &tmpl);
 548 }
 549
 550 static int mv_cesa_cbc_des_decrypt(struct ablkcipher_request *req)
 551 {
 552         struct mv_cesa_op_ctx tmpl;
 553
 554         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_DEC);
 555
 556         return mv_cesa_cbc_des_op(req, &tmpl);
 557 }
 558
 559 struct crypto_alg mv_cesa_cbc_des_alg = {
 560         .cra_name = "cbc(des)",
 561         .cra_driver_name = "mv-cbc-des",
 562         .cra_priority = 300,
 563         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 564                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 565         .cra_blocksize = DES_BLOCK_SIZE,
 566         .cra_ctxsize = sizeof(struct mv_cesa_des_ctx),
 567         .cra_alignmask = 0,
 568         .cra_type = &crypto_ablkcipher_type,
 569         .cra_module = THIS_MODULE,
 570         .cra_init = mv_cesa_ablkcipher_cra_init,
 571         .cra_u = {
 572                 .ablkcipher = {
 573                         .min_keysize = DES_KEY_SIZE,
 574                         .max_keysize = DES_KEY_SIZE,
 575                         .ivsize      = DES_BLOCK_SIZE,
 576                         .setkey = mv_cesa_des_setkey,
 577                         .encrypt = mv_cesa_cbc_des_encrypt,
 578                         .decrypt = mv_cesa_cbc_des_decrypt,
 579                 },
 580         },
 581 };
 582
 583 static int mv_cesa_des3_op(struct ablkcipher_request *req,
 584                            struct mv_cesa_op_ctx *tmpl)
 585 {
 586         struct mv_cesa_des3_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 587
 588         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTM_3DES,
 589                               CESA_SA_DESC_CFG_CRYPTM_MSK);
 590
 591         memcpy(tmpl->ctx.blkcipher.key, ctx->key, DES3_EDE_KEY_SIZE);
 592
 593         return mv_cesa_ablkcipher_queue_req(req, tmpl);
 594 }
 595
 596 static int mv_cesa_ecb_des3_ede_encrypt(struct ablkcipher_request *req)
 597 {
 598         struct mv_cesa_op_ctx tmpl;
 599
 600         mv_cesa_set_op_cfg(&tmpl,
 601                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 602                            CESA_SA_DESC_CFG_3DES_EDE |
 603                            CESA_SA_DESC_CFG_DIR_ENC);
 604
 605         return mv_cesa_des3_op(req, &tmpl);
 606 }
 607
 608 static int mv_cesa_ecb_des3_ede_decrypt(struct ablkcipher_request *req)
 609 {
 610         struct mv_cesa_op_ctx tmpl;
 611
 612         mv_cesa_set_op_cfg(&tmpl,
 613                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 614                            CESA_SA_DESC_CFG_3DES_EDE |
 615                            CESA_SA_DESC_CFG_DIR_DEC);
 616
 617         return mv_cesa_des3_op(req, &tmpl);
 618 }
 619
 620 struct crypto_alg mv_cesa_ecb_des3_ede_alg = {
 621         .cra_name = "ecb(des3_ede)",
 622         .cra_driver_name = "mv-ecb-des3-ede",
 623         .cra_priority = 300,
 624         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 625                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 626         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
 627         .cra_ctxsize = sizeof(struct mv_cesa_des3_ctx),
 628         .cra_alignmask = 0,
 629         .cra_type = &crypto_ablkcipher_type,
 630         .cra_module = THIS_MODULE,
 631         .cra_init = mv_cesa_ablkcipher_cra_init,
 632         .cra_u = {
 633                 .ablkcipher = {
 634                         .min_keysize = DES3_EDE_KEY_SIZE,
 635                         .max_keysize = DES3_EDE_KEY_SIZE,
 636                         .ivsize      = DES3_EDE_BLOCK_SIZE,
 637                         .setkey = mv_cesa_des3_ede_setkey,
 638                         .encrypt = mv_cesa_ecb_des3_ede_encrypt,
 639                         .decrypt = mv_cesa_ecb_des3_ede_decrypt,
 640                 },
 641         },
 642 };
 643
 644 static int mv_cesa_cbc_des3_op(struct ablkcipher_request *req,
 645                                struct mv_cesa_op_ctx *tmpl)
 646 {
 647         memcpy(tmpl->ctx.blkcipher.iv, req->info, DES3_EDE_BLOCK_SIZE);
 648
 649         return mv_cesa_des3_op(req, tmpl);
 650 }
 651
 652 static int mv_cesa_cbc_des3_ede_encrypt(struct ablkcipher_request *req)
 653 {
 654         struct mv_cesa_op_ctx tmpl;
 655
 656         mv_cesa_set_op_cfg(&tmpl,
 657                            CESA_SA_DESC_CFG_CRYPTCM_CBC |
 658                            CESA_SA_DESC_CFG_3DES_EDE |
 659                            CESA_SA_DESC_CFG_DIR_ENC);
 660
 661         return mv_cesa_cbc_des3_op(req, &tmpl);
 662 }
 663
 664 static int mv_cesa_cbc_des3_ede_decrypt(struct ablkcipher_request *req)
 665 {
 666         struct mv_cesa_op_ctx tmpl;
 667
 668         mv_cesa_set_op_cfg(&tmpl,
 669                            CESA_SA_DESC_CFG_CRYPTCM_CBC |
 670                            CESA_SA_DESC_CFG_3DES_EDE |
 671                            CESA_SA_DESC_CFG_DIR_DEC);
 672
 673         return mv_cesa_cbc_des3_op(req, &tmpl);
 674 }
 675
 676 struct crypto_alg mv_cesa_cbc_des3_ede_alg = {
 677         .cra_name = "cbc(des3_ede)",
 678         .cra_driver_name = "mv-cbc-des3-ede",
 679         .cra_priority = 300,
 680         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 681                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 682         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
 683         .cra_ctxsize = sizeof(struct mv_cesa_des3_ctx),
 684         .cra_alignmask = 0,
 685         .cra_type = &crypto_ablkcipher_type,
 686         .cra_module = THIS_MODULE,
 687         .cra_init = mv_cesa_ablkcipher_cra_init,
 688         .cra_u = {
 689                 .ablkcipher = {
 690                         .min_keysize = DES3_EDE_KEY_SIZE,
 691                         .max_keysize = DES3_EDE_KEY_SIZE,
 692                         .ivsize      = DES3_EDE_BLOCK_SIZE,
 693                         .setkey = mv_cesa_des3_ede_setkey,
 694                         .encrypt = mv_cesa_cbc_des3_ede_encrypt,
 695                         .decrypt = mv_cesa_cbc_des3_ede_decrypt,
 696                 },
 697         },
 698 };
 699
 700 static int mv_cesa_aes_op(struct ablkcipher_request *req,
 701                           struct mv_cesa_op_ctx *tmpl)
 702 {
 703         struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 704         int i;
 705         u32 *key;
 706         u32 cfg;
 707
 708         cfg = CESA_SA_DESC_CFG_CRYPTM_AES;
 709
 710         if (mv_cesa_get_op_cfg(tmpl) & CESA_SA_DESC_CFG_DIR_DEC)
 711                 key = ctx->aes.key_dec;
 712         else
 713                 key = ctx->aes.key_enc;
 714
 715         for (i = 0; i < ctx->aes.key_length / sizeof(u32); i++)
 716                 tmpl->ctx.blkcipher.key[i] = cpu_to_le32(key[i]);
 717
 718         if (ctx->aes.key_length == 24)
 719                 cfg |= CESA_SA_DESC_CFG_AES_LEN_192;
 720         else if (ctx->aes.key_length == 32)
 721                 cfg |= CESA_SA_DESC_CFG_AES_LEN_256;
 722
 723         mv_cesa_update_op_cfg(tmpl, cfg,
 724                               CESA_SA_DESC_CFG_CRYPTM_MSK |
 725                               CESA_SA_DESC_CFG_AES_LEN_MSK);
 726
 727         return mv_cesa_ablkcipher_queue_req(req, tmpl);
 728 }
 729
 730 static int mv_cesa_ecb_aes_encrypt(struct ablkcipher_request *req)
 731 {
 732         struct mv_cesa_op_ctx tmpl;
 733
 734         mv_cesa_set_op_cfg(&tmpl,
 735                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 736                            CESA_SA_DESC_CFG_DIR_ENC);
 737
 738         return mv_cesa_aes_op(req, &tmpl);
 739 }
 740
 741 static int mv_cesa_ecb_aes_decrypt(struct ablkcipher_request *req)
 742 {
 743         struct mv_cesa_op_ctx tmpl;
 744
 745         mv_cesa_set_op_cfg(&tmpl,
 746                            CESA_SA_DESC_CFG_CRYPTCM_ECB |
 747                            CESA_SA_DESC_CFG_DIR_DEC);
 748
 749         return mv_cesa_aes_op(req, &tmpl);
 750 }
 751
 752 struct crypto_alg mv_cesa_ecb_aes_alg = {
 753         .cra_name = "ecb(aes)",
 754         .cra_driver_name = "mv-ecb-aes",
 755         .cra_priority = 300,
 756         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 757                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 758         .cra_blocksize = AES_BLOCK_SIZE,
 759         .cra_ctxsize = sizeof(struct mv_cesa_aes_ctx),
 760         .cra_alignmask = 0,
 761         .cra_type = &crypto_ablkcipher_type,
 762         .cra_module = THIS_MODULE,
 763         .cra_init = mv_cesa_ablkcipher_cra_init,
 764         .cra_u = {
 765                 .ablkcipher = {
 766                         .min_keysize = AES_MIN_KEY_SIZE,
 767                         .max_keysize = AES_MAX_KEY_SIZE,
 768                         .setkey = mv_cesa_aes_setkey,
 769                         .encrypt = mv_cesa_ecb_aes_encrypt,
 770                         .decrypt = mv_cesa_ecb_aes_decrypt,
 771                 },
 772         },
 773 };
 774
 775 static int mv_cesa_cbc_aes_op(struct ablkcipher_request *req,
 776                               struct mv_cesa_op_ctx *tmpl)
 777 {
 778         mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTCM_CBC,
 779                               CESA_SA_DESC_CFG_CRYPTCM_MSK);
 780         memcpy(tmpl->ctx.blkcipher.iv, req->info, AES_BLOCK_SIZE);
 781
 782         return mv_cesa_aes_op(req, tmpl);
 783 }
 784
 785 static int mv_cesa_cbc_aes_encrypt(struct ablkcipher_request *req)
 786 {
 787         struct mv_cesa_op_ctx tmpl;
 788
 789         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_ENC);
 790
 791         return mv_cesa_cbc_aes_op(req, &tmpl);
 792 }
 793
 794 static int mv_cesa_cbc_aes_decrypt(struct ablkcipher_request *req)
 795 {
 796         struct mv_cesa_op_ctx tmpl;
 797
 798         mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_DEC);
 799
 800         return mv_cesa_cbc_aes_op(req, &tmpl);
 801 }
 802
 803 struct crypto_alg mv_cesa_cbc_aes_alg = {
 804         .cra_name = "cbc(aes)",
 805         .cra_driver_name = "mv-cbc-aes",
 806         .cra_priority = 300,
 807         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
 808                      CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 809         .cra_blocksize = AES_BLOCK_SIZE,
 810         .cra_ctxsize = sizeof(struct mv_cesa_aes_ctx),
 811         .cra_alignmask = 0,
 812         .cra_type = &crypto_ablkcipher_type,
 813         .cra_module = THIS_MODULE,
 814         .cra_init = mv_cesa_ablkcipher_cra_init,
 815         .cra_u = {
 816                 .ablkcipher = {
 817                         .min_keysize = AES_MIN_KEY_SIZE,
 818                         .max_keysize = AES_MAX_KEY_SIZE,
 819                         .ivsize = AES_BLOCK_SIZE,
 820                         .setkey = mv_cesa_aes_setkey,
 821                         .encrypt = mv_cesa_cbc_aes_encrypt,
 822                         .decrypt = mv_cesa_cbc_aes_decrypt,
 823                 },
 824         },
 825 };