drivers/crypto/caam/caampkc.c

   1 /*
   2  * caam - Freescale FSL CAAM support for Public Key Cryptography
   3  *
   4  * Copyright 2016 Freescale Semiconductor, Inc.
   5  *
   6  * There is no Shared Descriptor for PKC so that the Job Descriptor must carry
   7  * all the desired key parameters, input and output pointers.
   8  */
   9 #include "compat.h"
  10 #include "regs.h"
  11 #include "intern.h"
  12 #include "jr.h"
  13 #include "error.h"
  14 #include "desc_constr.h"
  15 #include "sg_sw_sec4.h"
  16 #include "caampkc.h"
  17
  18 #define DESC_RSA_PUB_LEN        (2 * CAAM_CMD_SZ + sizeof(struct rsa_pub_pdb))
  19 #define DESC_RSA_PRIV_F1_LEN    (2 * CAAM_CMD_SZ + \
  20                                  sizeof(struct rsa_priv_f1_pdb))
  21
  22 static void rsa_io_unmap(struct device *dev, struct rsa_edesc *edesc,
  23                          struct akcipher_request *req)
  24 {
  25         dma_unmap_sg(dev, req->dst, edesc->dst_nents, DMA_FROM_DEVICE);
  26         dma_unmap_sg(dev, req->src, edesc->src_nents, DMA_TO_DEVICE);
  27
  28         if (edesc->sec4_sg_bytes)
  29                 dma_unmap_single(dev, edesc->sec4_sg_dma, edesc->sec4_sg_bytes,
  30                                  DMA_TO_DEVICE);
  31 }
  32
  33 static void rsa_pub_unmap(struct device *dev, struct rsa_edesc *edesc,
  34                           struct akcipher_request *req)
  35 {
  36         struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
  37         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
  38         struct caam_rsa_key *key = &ctx->key;
  39         struct rsa_pub_pdb *pdb = &edesc->pdb.pub;
  40
  41         dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE);
  42         dma_unmap_single(dev, pdb->e_dma, key->e_sz, DMA_TO_DEVICE);
  43 }
  44
  45 static void rsa_priv_f1_unmap(struct device *dev, struct rsa_edesc *edesc,
  46                               struct akcipher_request *req)
  47 {
  48         struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
  49         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
  50         struct caam_rsa_key *key = &ctx->key;
  51         struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1;
  52
  53         dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE);
  54         dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE);
  55 }
  56
  57 /* RSA Job Completion handler */
  58 static void rsa_pub_done(struct device *dev, u32 *desc, u32 err, void *context)
  59 {
  60         struct akcipher_request *req = context;
  61         struct rsa_edesc *edesc;
  62
  63         if (err)
  64                 caam_jr_strstatus(dev, err);
  65
  66         edesc = container_of(desc, struct rsa_edesc, hw_desc[0]);
  67
  68         rsa_pub_unmap(dev, edesc, req);
  69         rsa_io_unmap(dev, edesc, req);
  70         kfree(edesc);
  71
  72         akcipher_request_complete(req, err);
  73 }
  74
  75 static void rsa_priv_f1_done(struct device *dev, u32 *desc, u32 err,
  76                              void *context)
  77 {
  78         struct akcipher_request *req = context;
  79         struct rsa_edesc *edesc;
  80
  81         if (err)
  82                 caam_jr_strstatus(dev, err);
  83
  84         edesc = container_of(desc, struct rsa_edesc, hw_desc[0]);
  85
  86         rsa_priv_f1_unmap(dev, edesc, req);
  87         rsa_io_unmap(dev, edesc, req);
  88         kfree(edesc);
  89
  90         akcipher_request_complete(req, err);
  91 }
  92
  93 static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req,
  94                                          size_t desclen)
  95 {
  96         struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
  97         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
  98         struct device *dev = ctx->dev;
  99         struct rsa_edesc *edesc;
 100         gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
 101                        CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
 102         int sgc;
 103         int sec4_sg_index, sec4_sg_len = 0, sec4_sg_bytes;
 104         int src_nents, dst_nents;
 105
 106         src_nents = sg_nents_for_len(req->src, req->src_len);
 107         dst_nents = sg_nents_for_len(req->dst, req->dst_len);
 108
 109         if (src_nents > 1)
 110                 sec4_sg_len = src_nents;
 111         if (dst_nents > 1)
 112                 sec4_sg_len += dst_nents;
 113
 114         sec4_sg_bytes = sec4_sg_len * sizeof(struct sec4_sg_entry);
 115
 116         /* allocate space for base edesc, hw desc commands and link tables */
 117         edesc = kzalloc(sizeof(*edesc) + desclen + sec4_sg_bytes,
 118                         GFP_DMA | flags);
 119         if (!edesc)
 120                 return ERR_PTR(-ENOMEM);
 121
 122         sgc = dma_map_sg(dev, req->src, src_nents, DMA_TO_DEVICE);
 123         if (unlikely(!sgc)) {
 124                 dev_err(dev, "unable to map source\n");
 125                 goto src_fail;
 126         }
 127
 128         sgc = dma_map_sg(dev, req->dst, dst_nents, DMA_FROM_DEVICE);
 129         if (unlikely(!sgc)) {
 130                 dev_err(dev, "unable to map destination\n");
 131                 goto dst_fail;
 132         }
 133
 134         edesc->sec4_sg = (void *)edesc + sizeof(*edesc) + desclen;
 135
 136         sec4_sg_index = 0;
 137         if (src_nents > 1) {
 138                 sg_to_sec4_sg_last(req->src, src_nents, edesc->sec4_sg, 0);
 139                 sec4_sg_index += src_nents;
 140         }
 141         if (dst_nents > 1)
 142                 sg_to_sec4_sg_last(req->dst, dst_nents,
 143                                    edesc->sec4_sg + sec4_sg_index, 0);
 144
 145         /* Save nents for later use in Job Descriptor */
 146         edesc->src_nents = src_nents;
 147         edesc->dst_nents = dst_nents;
 148
 149         if (!sec4_sg_bytes)
 150                 return edesc;
 151
 152         edesc->sec4_sg_dma = dma_map_single(dev, edesc->sec4_sg,
 153                                             sec4_sg_bytes, DMA_TO_DEVICE);
 154         if (dma_mapping_error(dev, edesc->sec4_sg_dma)) {
 155                 dev_err(dev, "unable to map S/G table\n");
 156                 goto sec4_sg_fail;
 157         }
 158
 159         edesc->sec4_sg_bytes = sec4_sg_bytes;
 160
 161         return edesc;
 162
 163 sec4_sg_fail:
 164         dma_unmap_sg(dev, req->dst, dst_nents, DMA_FROM_DEVICE);
 165 dst_fail:
 166         dma_unmap_sg(dev, req->src, src_nents, DMA_TO_DEVICE);
 167 src_fail:
 168         kfree(edesc);
 169         return ERR_PTR(-ENOMEM);
 170 }
 171
 172 static int set_rsa_pub_pdb(struct akcipher_request *req,
 173                            struct rsa_edesc *edesc)
 174 {
 175         struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
 176         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
 177         struct caam_rsa_key *key = &ctx->key;
 178         struct device *dev = ctx->dev;
 179         struct rsa_pub_pdb *pdb = &edesc->pdb.pub;
 180         int sec4_sg_index = 0;
 181
 182         pdb->n_dma = dma_map_single(dev, key->n, key->n_sz, DMA_TO_DEVICE);
 183         if (dma_mapping_error(dev, pdb->n_dma)) {
 184                 dev_err(dev, "Unable to map RSA modulus memory\n");
 185                 return -ENOMEM;
 186         }
 187
 188         pdb->e_dma = dma_map_single(dev, key->e, key->e_sz, DMA_TO_DEVICE);
 189         if (dma_mapping_error(dev, pdb->e_dma)) {
 190                 dev_err(dev, "Unable to map RSA public exponent memory\n");
 191                 dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE);
 192                 return -ENOMEM;
 193         }
 194
 195         if (edesc->src_nents > 1) {
 196                 pdb->sgf |= RSA_PDB_SGF_F;
 197                 pdb->f_dma = edesc->sec4_sg_dma;
 198                 sec4_sg_index += edesc->src_nents;
 199         } else {
 200                 pdb->f_dma = sg_dma_address(req->src);
 201         }
 202
 203         if (edesc->dst_nents > 1) {
 204                 pdb->sgf |= RSA_PDB_SGF_G;
 205                 pdb->g_dma = edesc->sec4_sg_dma +
 206                              sec4_sg_index * sizeof(struct sec4_sg_entry);
 207         } else {
 208                 pdb->g_dma = sg_dma_address(req->dst);
 209         }
 210
 211         pdb->sgf |= (key->e_sz << RSA_PDB_E_SHIFT) | key->n_sz;
 212         pdb->f_len = req->src_len;
 213
 214         return 0;
 215 }
 216
 217 static int set_rsa_priv_f1_pdb(struct akcipher_request *req,
 218                                struct rsa_edesc *edesc)
 219 {
 220         struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
 221         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
 222         struct caam_rsa_key *key = &ctx->key;
 223         struct device *dev = ctx->dev;
 224         struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1;
 225         int sec4_sg_index = 0;
 226
 227         pdb->n_dma = dma_map_single(dev, key->n, key->n_sz, DMA_TO_DEVICE);
 228         if (dma_mapping_error(dev, pdb->n_dma)) {
 229                 dev_err(dev, "Unable to map modulus memory\n");
 230                 return -ENOMEM;
 231         }
 232
 233         pdb->d_dma = dma_map_single(dev, key->d, key->d_sz, DMA_TO_DEVICE);
 234         if (dma_mapping_error(dev, pdb->d_dma)) {
 235                 dev_err(dev, "Unable to map RSA private exponent memory\n");
 236                 dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE);
 237                 return -ENOMEM;
 238         }
 239
 240         if (edesc->src_nents > 1) {
 241                 pdb->sgf |= RSA_PRIV_PDB_SGF_G;
 242                 pdb->g_dma = edesc->sec4_sg_dma;
 243                 sec4_sg_index += edesc->src_nents;
 244         } else {
 245                 pdb->g_dma = sg_dma_address(req->src);
 246         }
 247
 248         if (edesc->dst_nents > 1) {
 249                 pdb->sgf |= RSA_PRIV_PDB_SGF_F;
 250                 pdb->f_dma = edesc->sec4_sg_dma +
 251                              sec4_sg_index * sizeof(struct sec4_sg_entry);
 252         } else {
 253                 pdb->f_dma = sg_dma_address(req->dst);
 254         }
 255
 256         pdb->sgf |= (key->d_sz << RSA_PDB_D_SHIFT) | key->n_sz;
 257
 258         return 0;
 259 }
 260
 261 static int caam_rsa_enc(struct akcipher_request *req)
 262 {
 263         struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
 264         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
 265         struct caam_rsa_key *key = &ctx->key;
 266         struct device *jrdev = ctx->dev;
 267         struct rsa_edesc *edesc;
 268         int ret;
 269
 270         if (unlikely(!key->n || !key->e))
 271                 return -EINVAL;
 272
 273         if (req->dst_len < key->n_sz) {
 274                 req->dst_len = key->n_sz;
 275                 dev_err(jrdev, "Output buffer length less than parameter n\n");
 276                 return -EOVERFLOW;
 277         }
 278
 279         /* Allocate extended descriptor */
 280         edesc = rsa_edesc_alloc(req, DESC_RSA_PUB_LEN);
 281         if (IS_ERR(edesc))
 282                 return PTR_ERR(edesc);
 283
 284         /* Set RSA Encrypt Protocol Data Block */
 285         ret = set_rsa_pub_pdb(req, edesc);
 286         if (ret)
 287                 goto init_fail;
 288
 289         /* Initialize Job Descriptor */
 290         init_rsa_pub_desc(edesc->hw_desc, &edesc->pdb.pub);
 291
 292         ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_pub_done, req);
 293         if (!ret)
 294                 return -EINPROGRESS;
 295
 296         rsa_pub_unmap(jrdev, edesc, req);
 297
 298 init_fail:
 299         rsa_io_unmap(jrdev, edesc, req);
 300         kfree(edesc);
 301         return ret;
 302 }
 303
 304 static int caam_rsa_dec(struct akcipher_request *req)
 305 {
 306         struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
 307         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
 308         struct caam_rsa_key *key = &ctx->key;
 309         struct device *jrdev = ctx->dev;
 310         struct rsa_edesc *edesc;
 311         int ret;
 312
 313         if (unlikely(!key->n || !key->d))
 314                 return -EINVAL;
 315
 316         if (req->dst_len < key->n_sz) {
 317                 req->dst_len = key->n_sz;
 318                 dev_err(jrdev, "Output buffer length less than parameter n\n");
 319                 return -EOVERFLOW;
 320         }
 321
 322         /* Allocate extended descriptor */
 323         edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F1_LEN);
 324         if (IS_ERR(edesc))
 325                 return PTR_ERR(edesc);
 326
 327         /* Set RSA Decrypt Protocol Data Block - Private Key Form #1 */
 328         ret = set_rsa_priv_f1_pdb(req, edesc);
 329         if (ret)
 330                 goto init_fail;
 331
 332         /* Initialize Job Descriptor */
 333         init_rsa_priv_f1_desc(edesc->hw_desc, &edesc->pdb.priv_f1);
 334
 335         ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_priv_f1_done, req);
 336         if (!ret)
 337                 return -EINPROGRESS;
 338
 339         rsa_priv_f1_unmap(jrdev, edesc, req);
 340
 341 init_fail:
 342         rsa_io_unmap(jrdev, edesc, req);
 343         kfree(edesc);
 344         return ret;
 345 }
 346
 347 static void caam_rsa_free_key(struct caam_rsa_key *key)
 348 {
 349         kzfree(key->d);
 350         kfree(key->e);
 351         kfree(key->n);
 352         key->d = NULL;
 353         key->e = NULL;
 354         key->n = NULL;
 355         key->d_sz = 0;
 356         key->e_sz = 0;
 357         key->n_sz = 0;
 358 }
 359
 360 /**
 361  * caam_read_raw_data - Read a raw byte stream as a positive integer.
 362  * The function skips buffer's leading zeros, copies the remained data
 363  * to a buffer allocated in the GFP_DMA | GFP_KERNEL zone and returns
 364  * the address of the new buffer.
 365  *
 366  * @buf   : The data to read
 367  * @nbytes: The amount of data to read
 368  */
 369 static inline u8 *caam_read_raw_data(const u8 *buf, size_t *nbytes)
 370 {
 371         u8 *val;
 372
 373         while (!*buf && *nbytes) {
 374                 buf++;
 375                 (*nbytes)--;
 376         }
 377
 378         val = kzalloc(*nbytes, GFP_DMA | GFP_KERNEL);
 379         if (!val)
 380                 return NULL;
 381
 382         memcpy(val, buf, *nbytes);
 383
 384         return val;
 385 }
 386
 387 static int caam_rsa_check_key_length(unsigned int len)
 388 {
 389         if (len > 4096)
 390                 return -EINVAL;
 391         return 0;
 392 }
 393
 394 static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
 395                                 unsigned int keylen)
 396 {
 397         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
 398         struct rsa_key raw_key = {NULL};
 399         struct caam_rsa_key *rsa_key = &ctx->key;
 400         int ret;
 401
 402         /* Free the old RSA key if any */
 403         caam_rsa_free_key(rsa_key);
 404
 405         ret = rsa_parse_pub_key(&raw_key, key, keylen);
 406         if (ret)
 407                 return ret;
 408
 409         /* Copy key in DMA zone */
 410         rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL);
 411         if (!rsa_key->e)
 412                 goto err;
 413
 414         /*
 415          * Skip leading zeros and copy the positive integer to a buffer
 416          * allocated in the GFP_DMA | GFP_KERNEL zone. The decryption descriptor
 417          * expects a positive integer for the RSA modulus and uses its length as
 418          * decryption output length.
 419          */
 420         rsa_key->n = caam_read_raw_data(raw_key.n, &raw_key.n_sz);
 421         if (!rsa_key->n)
 422                 goto err;
 423
 424         if (caam_rsa_check_key_length(raw_key.n_sz << 3)) {
 425                 caam_rsa_free_key(rsa_key);
 426                 return -EINVAL;
 427         }
 428
 429         rsa_key->e_sz = raw_key.e_sz;
 430         rsa_key->n_sz = raw_key.n_sz;
 431
 432         memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
 433
 434         return 0;
 435 err:
 436         caam_rsa_free_key(rsa_key);
 437         return -ENOMEM;
 438 }
 439
 440 static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
 441                                  unsigned int keylen)
 442 {
 443         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
 444         struct rsa_key raw_key = {NULL};
 445         struct caam_rsa_key *rsa_key = &ctx->key;
 446         int ret;
 447
 448         /* Free the old RSA key if any */
 449         caam_rsa_free_key(rsa_key);
 450
 451         ret = rsa_parse_priv_key(&raw_key, key, keylen);
 452         if (ret)
 453                 return ret;
 454
 455         /* Copy key in DMA zone */
 456         rsa_key->d = kzalloc(raw_key.d_sz, GFP_DMA | GFP_KERNEL);
 457         if (!rsa_key->d)
 458                 goto err;
 459
 460         rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL);
 461         if (!rsa_key->e)
 462                 goto err;
 463
 464         /*
 465          * Skip leading zeros and copy the positive integer to a buffer
 466          * allocated in the GFP_DMA | GFP_KERNEL zone. The decryption descriptor
 467          * expects a positive integer for the RSA modulus and uses its length as
 468          * decryption output length.
 469          */
 470         rsa_key->n = caam_read_raw_data(raw_key.n, &raw_key.n_sz);
 471         if (!rsa_key->n)
 472                 goto err;
 473
 474         if (caam_rsa_check_key_length(raw_key.n_sz << 3)) {
 475                 caam_rsa_free_key(rsa_key);
 476                 return -EINVAL;
 477         }
 478
 479         rsa_key->d_sz = raw_key.d_sz;
 480         rsa_key->e_sz = raw_key.e_sz;
 481         rsa_key->n_sz = raw_key.n_sz;
 482
 483         memcpy(rsa_key->d, raw_key.d, raw_key.d_sz);
 484         memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
 485
 486         return 0;
 487
 488 err:
 489         caam_rsa_free_key(rsa_key);
 490         return -ENOMEM;
 491 }
 492
 493 static int caam_rsa_max_size(struct crypto_akcipher *tfm)
 494 {
 495         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
 496         struct caam_rsa_key *key = &ctx->key;
 497
 498         return (key->n) ? key->n_sz : -EINVAL;
 499 }
 500
 501 /* Per session pkc's driver context creation function */
 502 static int caam_rsa_init_tfm(struct crypto_akcipher *tfm)
 503 {
 504         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
 505
 506         ctx->dev = caam_jr_alloc();
 507
 508         if (IS_ERR(ctx->dev)) {
 509                 dev_err(ctx->dev, "Job Ring Device allocation for transform failed\n");
 510                 return PTR_ERR(ctx->dev);
 511         }
 512
 513         return 0;
 514 }
 515
 516 /* Per session pkc's driver context cleanup function */
 517 static void caam_rsa_exit_tfm(struct crypto_akcipher *tfm)
 518 {
 519         struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
 520         struct caam_rsa_key *key = &ctx->key;
 521
 522         caam_rsa_free_key(key);
 523         caam_jr_free(ctx->dev);
 524 }
 525
 526 static struct akcipher_alg caam_rsa = {
 527         .encrypt = caam_rsa_enc,
 528         .decrypt = caam_rsa_dec,
 529         .sign = caam_rsa_dec,
 530         .verify = caam_rsa_enc,
 531         .set_pub_key = caam_rsa_set_pub_key,
 532         .set_priv_key = caam_rsa_set_priv_key,
 533         .max_size = caam_rsa_max_size,
 534         .init = caam_rsa_init_tfm,
 535         .exit = caam_rsa_exit_tfm,
 536         .base = {
 537                 .cra_name = "rsa",
 538                 .cra_driver_name = "rsa-caam",
 539                 .cra_priority = 3000,
 540                 .cra_module = THIS_MODULE,
 541                 .cra_ctxsize = sizeof(struct caam_rsa_ctx),
 542         },
 543 };
 544
 545 /* Public Key Cryptography module initialization handler */
 546 static int __init caam_pkc_init(void)
 547 {
 548         struct device_node *dev_node;
 549         struct platform_device *pdev;
 550         struct device *ctrldev;
 551         struct caam_drv_private *priv;
 552         u32 cha_inst, pk_inst;
 553         int err;
 554
 555         dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
 556         if (!dev_node) {
 557                 dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec4.0");
 558                 if (!dev_node)
 559                         return -ENODEV;
 560         }
 561
 562         pdev = of_find_device_by_node(dev_node);
 563         if (!pdev) {
 564                 of_node_put(dev_node);
 565                 return -ENODEV;
 566         }
 567
 568         ctrldev = &pdev->dev;
 569         priv = dev_get_drvdata(ctrldev);
 570         of_node_put(dev_node);
 571
 572         /*
 573          * If priv is NULL, it's probably because the caam driver wasn't
 574          * properly initialized (e.g. RNG4 init failed). Thus, bail out here.
 575          */
 576         if (!priv)
 577                 return -ENODEV;
 578
 579         /* Determine public key hardware accelerator presence. */
 580         cha_inst = rd_reg32(&priv->ctrl->perfmon.cha_num_ls);
 581         pk_inst = (cha_inst & CHA_ID_LS_PK_MASK) >> CHA_ID_LS_PK_SHIFT;
 582
 583         /* Do not register algorithms if PKHA is not present. */
 584         if (!pk_inst)
 585                 return -ENODEV;
 586
 587         err = crypto_register_akcipher(&caam_rsa);
 588         if (err)
 589                 dev_warn(ctrldev, "%s alg registration failed\n",
 590                          caam_rsa.base.cra_driver_name);
 591         else
 592                 dev_info(ctrldev, "caam pkc algorithms registered in /proc/crypto\n");
 593
 594         return err;
 595 }
 596
 597 static void __exit caam_pkc_exit(void)
 598 {
 599         crypto_unregister_akcipher(&caam_rsa);
 600 }
 601
 602 module_init(caam_pkc_init);
 603 module_exit(caam_pkc_exit);
 604
 605 MODULE_LICENSE("Dual BSD/GPL");
 606 MODULE_DESCRIPTION("FSL CAAM support for PKC functions of crypto API");
 607 MODULE_AUTHOR("Freescale Semiconductor");