drivers/crypto/mv_cesa.c

   1 /*
   2  * Support for Marvell's crypto engine which can be found on some Orion5X
   3  * boards.
   4  *
   5  * Author: Sebastian Andrzej Siewior < sebastian at breakpoint dot cc >
   6  * License: GPLv2
   7  *
   8  */
   9 #include <crypto/aes.h>
  10 #include <crypto/algapi.h>
  11 #include <linux/crypto.h>
  12 #include <linux/genalloc.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/io.h>
  15 #include <linux/kthread.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/scatterlist.h>
  18 #include <linux/slab.h>
  19 #include <linux/module.h>
  20 #include <linux/clk.h>
  21 #include <crypto/internal/hash.h>
  22 #include <crypto/sha.h>
  23 #include <linux/of.h>
  24 #include <linux/of_platform.h>
  25 #include <linux/of_irq.h>
  26
  27 #include "mv_cesa.h"
  28
  29 #define MV_CESA "MV-CESA:"
  30 #define MAX_HW_HASH_SIZE        0xFFFF
  31 #define MV_CESA_EXPIRE          500 /* msec */
  32
  33 #define MV_CESA_DEFAULT_SRAM_SIZE       2048
  34
  35 /*
  36  * STM:
  37  *   /---------------------------------------\
  38  *   |                                       | request complete
  39  *  \./                                      |
  40  * IDLE -> new request -> BUSY -> done -> DEQUEUE
  41  *                         /°\               |
  42  *                          |                | more scatter entries
  43  *                          \________________/
  44  */
  45 enum engine_status {
  46         ENGINE_IDLE,
  47         ENGINE_BUSY,
  48         ENGINE_W_DEQUEUE,
  49 };
  50
  51 /**
  52  * struct req_progress - used for every crypt request
  53  * @src_sg_it:          sg iterator for src
  54  * @dst_sg_it:          sg iterator for dst
  55  * @sg_src_left:        bytes left in src to process (scatter list)
  56  * @src_start:          offset to add to src start position (scatter list)
  57  * @crypt_len:          length of current hw crypt/hash process
  58  * @hw_nbytes:          total bytes to process in hw for this request
  59  * @copy_back:          whether to copy data back (crypt) or not (hash)
  60  * @sg_dst_left:        bytes left dst to process in this scatter list
  61  * @dst_start:          offset to add to dst start position (scatter list)
  62  * @hw_processed_bytes: number of bytes processed by hw (request).
  63  *
  64  * sg helper are used to iterate over the scatterlist. Since the size of the
  65  * SRAM may be less than the scatter size, this struct struct is used to keep
  66  * track of progress within current scatterlist.
  67  */
  68 struct req_progress {
  69         struct sg_mapping_iter src_sg_it;
  70         struct sg_mapping_iter dst_sg_it;
  71         void (*complete) (void);
  72         void (*process) (int is_first);
  73
  74         /* src mostly */
  75         int sg_src_left;
  76         int src_start;
  77         int crypt_len;
  78         int hw_nbytes;
  79         /* dst mostly */
  80         int copy_back;
  81         int sg_dst_left;
  82         int dst_start;
  83         int hw_processed_bytes;
  84 };
  85
  86 struct crypto_priv {
  87         void __iomem *reg;
  88         void __iomem *sram;
  89         struct gen_pool *sram_pool;
  90         dma_addr_t sram_dma;
  91         int irq;
  92         struct clk *clk;
  93         struct task_struct *queue_th;
  94
  95         /* the lock protects queue and eng_st */
  96         spinlock_t lock;
  97         struct crypto_queue queue;
  98         enum engine_status eng_st;
  99         struct timer_list completion_timer;
 100         struct crypto_async_request *cur_req;
 101         struct req_progress p;
 102         int max_req_size;
 103         int sram_size;
 104         int has_sha1;
 105         int has_hmac_sha1;
 106 };
 107
 108 static struct crypto_priv *cpg;
 109
 110 struct mv_ctx {
 111         u8 aes_enc_key[AES_KEY_LEN];
 112         u32 aes_dec_key[8];
 113         int key_len;
 114         u32 need_calc_aes_dkey;
 115 };
 116
 117 enum crypto_op {
 118         COP_AES_ECB,
 119         COP_AES_CBC,
 120 };
 121
 122 struct mv_req_ctx {
 123         enum crypto_op op;
 124         int decrypt;
 125 };
 126
 127 enum hash_op {
 128         COP_SHA1,
 129         COP_HMAC_SHA1
 130 };
 131
 132 struct mv_tfm_hash_ctx {
 133         struct crypto_shash *fallback;
 134         struct crypto_shash *base_hash;
 135         u32 ivs[2 * SHA1_DIGEST_SIZE / 4];
 136         int count_add;
 137         enum hash_op op;
 138 };
 139
 140 struct mv_req_hash_ctx {
 141         u64 count;
 142         u32 state[SHA1_DIGEST_SIZE / 4];
 143         u8 buffer[SHA1_BLOCK_SIZE];
 144         int first_hash;         /* marks that we don't have previous state */
 145         int last_chunk;         /* marks that this is the 'final' request */
 146         int extra_bytes;        /* unprocessed bytes in buffer */
 147         enum hash_op op;
 148         int count_add;
 149 };
 150
 151 static void mv_completion_timer_callback(unsigned long unused)
 152 {
 153         int active = readl(cpg->reg + SEC_ACCEL_CMD) & SEC_CMD_EN_SEC_ACCL0;
 154
 155         printk(KERN_ERR MV_CESA
 156                "completion timer expired (CESA %sactive), cleaning up.\n",
 157                active ? "" : "in");
 158
 159         del_timer(&cpg->completion_timer);
 160         writel(SEC_CMD_DISABLE_SEC, cpg->reg + SEC_ACCEL_CMD);
 161         while(readl(cpg->reg + SEC_ACCEL_CMD) & SEC_CMD_DISABLE_SEC)
 162                 printk(KERN_INFO MV_CESA "%s: waiting for engine finishing\n", __func__);
 163         cpg->eng_st = ENGINE_W_DEQUEUE;
 164         wake_up_process(cpg->queue_th);
 165 }
 166
 167 static void mv_setup_timer(void)
 168 {
 169         setup_timer(&cpg->completion_timer, &mv_completion_timer_callback, 0);
 170         mod_timer(&cpg->completion_timer,
 171                         jiffies + msecs_to_jiffies(MV_CESA_EXPIRE));
 172 }
 173
 174 static void compute_aes_dec_key(struct mv_ctx *ctx)
 175 {
 176         struct crypto_aes_ctx gen_aes_key;
 177         int key_pos;
 178
 179         if (!ctx->need_calc_aes_dkey)
 180                 return;
 181
 182         crypto_aes_expand_key(&gen_aes_key, ctx->aes_enc_key, ctx->key_len);
 183
 184         key_pos = ctx->key_len + 24;
 185         memcpy(ctx->aes_dec_key, &gen_aes_key.key_enc[key_pos], 4 * 4);
 186         switch (ctx->key_len) {
 187         case AES_KEYSIZE_256:
 188                 key_pos -= 2;
 189                 /* fall */
 190         case AES_KEYSIZE_192:
 191                 key_pos -= 2;
 192                 memcpy(&ctx->aes_dec_key[4], &gen_aes_key.key_enc[key_pos],
 193                                 4 * 4);
 194                 break;
 195         }
 196         ctx->need_calc_aes_dkey = 0;
 197 }
 198
 199 static int mv_setkey_aes(struct crypto_ablkcipher *cipher, const u8 *key,
 200                 unsigned int len)
 201 {
 202         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
 203         struct mv_ctx *ctx = crypto_tfm_ctx(tfm);
 204
 205         switch (len) {
 206         case AES_KEYSIZE_128:
 207         case AES_KEYSIZE_192:
 208         case AES_KEYSIZE_256:
 209                 break;
 210         default:
 211                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
 212                 return -EINVAL;
 213         }
 214         ctx->key_len = len;
 215         ctx->need_calc_aes_dkey = 1;
 216
 217         memcpy(ctx->aes_enc_key, key, AES_KEY_LEN);
 218         return 0;
 219 }
 220
 221 static void copy_src_to_buf(struct req_progress *p, char *dbuf, int len)
 222 {
 223         int ret;
 224         void *sbuf;
 225         int copy_len;
 226
 227         while (len) {
 228                 if (!p->sg_src_left) {
 229                         ret = sg_miter_next(&p->src_sg_it);
 230                         BUG_ON(!ret);
 231                         p->sg_src_left = p->src_sg_it.length;
 232                         p->src_start = 0;
 233                 }
 234
 235                 sbuf = p->src_sg_it.addr + p->src_start;
 236
 237                 copy_len = min(p->sg_src_left, len);
 238                 memcpy(dbuf, sbuf, copy_len);
 239
 240                 p->src_start += copy_len;
 241                 p->sg_src_left -= copy_len;
 242
 243                 len -= copy_len;
 244                 dbuf += copy_len;
 245         }
 246 }
 247
 248 static void setup_data_in(void)
 249 {
 250         struct req_progress *p = &cpg->p;
 251         int data_in_sram =
 252             min(p->hw_nbytes - p->hw_processed_bytes, cpg->max_req_size);
 253         copy_src_to_buf(p, cpg->sram + SRAM_DATA_IN_START + p->crypt_len,
 254                         data_in_sram - p->crypt_len);
 255         p->crypt_len = data_in_sram;
 256 }
 257
 258 static void mv_process_current_q(int first_block)
 259 {
 260         struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req);
 261         struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 262         struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
 263         struct sec_accel_config op;
 264
 265         switch (req_ctx->op) {
 266         case COP_AES_ECB:
 267                 op.config = CFG_OP_CRYPT_ONLY | CFG_ENCM_AES | CFG_ENC_MODE_ECB;
 268                 break;
 269         case COP_AES_CBC:
 270         default:
 271                 op.config = CFG_OP_CRYPT_ONLY | CFG_ENCM_AES | CFG_ENC_MODE_CBC;
 272                 op.enc_iv = ENC_IV_POINT(SRAM_DATA_IV) |
 273                         ENC_IV_BUF_POINT(SRAM_DATA_IV_BUF);
 274                 if (first_block)
 275                         memcpy(cpg->sram + SRAM_DATA_IV, req->info, 16);
 276                 break;
 277         }
 278         if (req_ctx->decrypt) {
 279                 op.config |= CFG_DIR_DEC;
 280                 memcpy(cpg->sram + SRAM_DATA_KEY_P, ctx->aes_dec_key,
 281                                 AES_KEY_LEN);
 282         } else {
 283                 op.config |= CFG_DIR_ENC;
 284                 memcpy(cpg->sram + SRAM_DATA_KEY_P, ctx->aes_enc_key,
 285                                 AES_KEY_LEN);
 286         }
 287
 288         switch (ctx->key_len) {
 289         case AES_KEYSIZE_128:
 290                 op.config |= CFG_AES_LEN_128;
 291                 break;
 292         case AES_KEYSIZE_192:
 293                 op.config |= CFG_AES_LEN_192;
 294                 break;
 295         case AES_KEYSIZE_256:
 296                 op.config |= CFG_AES_LEN_256;
 297                 break;
 298         }
 299         op.enc_p = ENC_P_SRC(SRAM_DATA_IN_START) |
 300                 ENC_P_DST(SRAM_DATA_OUT_START);
 301         op.enc_key_p = SRAM_DATA_KEY_P;
 302
 303         setup_data_in();
 304         op.enc_len = cpg->p.crypt_len;
 305         memcpy(cpg->sram + SRAM_CONFIG, &op,
 306                         sizeof(struct sec_accel_config));
 307
 308         /* GO */
 309         mv_setup_timer();
 310         writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD);
 311 }
 312
 313 static void mv_crypto_algo_completion(void)
 314 {
 315         struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req);
 316         struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
 317
 318         sg_miter_stop(&cpg->p.src_sg_it);
 319         sg_miter_stop(&cpg->p.dst_sg_it);
 320
 321         if (req_ctx->op != COP_AES_CBC)
 322                 return ;
 323
 324         memcpy(req->info, cpg->sram + SRAM_DATA_IV_BUF, 16);
 325 }
 326
 327 static void mv_process_hash_current(int first_block)
 328 {
 329         struct ahash_request *req = ahash_request_cast(cpg->cur_req);
 330         const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm);
 331         struct mv_req_hash_ctx *req_ctx = ahash_request_ctx(req);
 332         struct req_progress *p = &cpg->p;
 333         struct sec_accel_config op = { 0 };
 334         int is_last;
 335
 336         switch (req_ctx->op) {
 337         case COP_SHA1:
 338         default:
 339                 op.config = CFG_OP_MAC_ONLY | CFG_MACM_SHA1;
 340                 break;
 341         case COP_HMAC_SHA1:
 342                 op.config = CFG_OP_MAC_ONLY | CFG_MACM_HMAC_SHA1;
 343                 memcpy(cpg->sram + SRAM_HMAC_IV_IN,
 344                                 tfm_ctx->ivs, sizeof(tfm_ctx->ivs));
 345                 break;
 346         }
 347
 348         op.mac_src_p =
 349                 MAC_SRC_DATA_P(SRAM_DATA_IN_START) | MAC_SRC_TOTAL_LEN((u32)
 350                 req_ctx->
 351                 count);
 352
 353         setup_data_in();
 354
 355         op.mac_digest =
 356                 MAC_DIGEST_P(SRAM_DIGEST_BUF) | MAC_FRAG_LEN(p->crypt_len);
 357         op.mac_iv =
 358                 MAC_INNER_IV_P(SRAM_HMAC_IV_IN) |
 359                 MAC_OUTER_IV_P(SRAM_HMAC_IV_OUT);
 360
 361         is_last = req_ctx->last_chunk
 362                 && (p->hw_processed_bytes + p->crypt_len >= p->hw_nbytes)
 363                 && (req_ctx->count <= MAX_HW_HASH_SIZE);
 364         if (req_ctx->first_hash) {
 365                 if (is_last)
 366                         op.config |= CFG_NOT_FRAG;
 367                 else
 368                         op.config |= CFG_FIRST_FRAG;
 369
 370                 req_ctx->first_hash = 0;
 371         } else {
 372                 if (is_last)
 373                         op.config |= CFG_LAST_FRAG;
 374                 else
 375                         op.config |= CFG_MID_FRAG;
 376
 377                 if (first_block) {
 378                         writel(req_ctx->state[0], cpg->reg + DIGEST_INITIAL_VAL_A);
 379                         writel(req_ctx->state[1], cpg->reg + DIGEST_INITIAL_VAL_B);
 380                         writel(req_ctx->state[2], cpg->reg + DIGEST_INITIAL_VAL_C);
 381                         writel(req_ctx->state[3], cpg->reg + DIGEST_INITIAL_VAL_D);
 382                         writel(req_ctx->state[4], cpg->reg + DIGEST_INITIAL_VAL_E);
 383                 }
 384         }
 385
 386         memcpy(cpg->sram + SRAM_CONFIG, &op, sizeof(struct sec_accel_config));
 387
 388         /* GO */
 389         mv_setup_timer();
 390         writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD);
 391 }
 392
 393 static inline int mv_hash_import_sha1_ctx(const struct mv_req_hash_ctx *ctx,
 394                                           struct shash_desc *desc)
 395 {
 396         int i;
 397         struct sha1_state shash_state;
 398
 399         shash_state.count = ctx->count + ctx->count_add;
 400         for (i = 0; i < 5; i++)
 401                 shash_state.state[i] = ctx->state[i];
 402         memcpy(shash_state.buffer, ctx->buffer, sizeof(shash_state.buffer));
 403         return crypto_shash_import(desc, &shash_state);
 404 }
 405
 406 static int mv_hash_final_fallback(struct ahash_request *req)
 407 {
 408         const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm);
 409         struct mv_req_hash_ctx *req_ctx = ahash_request_ctx(req);
 410         SHASH_DESC_ON_STACK(shash, tfm_ctx->fallback);
 411         int rc;
 412
 413         shash->tfm = tfm_ctx->fallback;
 414         shash->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 415         if (unlikely(req_ctx->first_hash)) {
 416                 crypto_shash_init(shash);
 417                 crypto_shash_update(shash, req_ctx->buffer,
 418                                     req_ctx->extra_bytes);
 419         } else {
 420                 /* only SHA1 for now....
 421                  */
 422                 rc = mv_hash_import_sha1_ctx(req_ctx, shash);
 423                 if (rc)
 424                         goto out;
 425         }
 426         rc = crypto_shash_final(shash, req->result);
 427 out:
 428         return rc;
 429 }
 430
 431 static void mv_save_digest_state(struct mv_req_hash_ctx *ctx)
 432 {
 433         ctx->state[0] = readl(cpg->reg + DIGEST_INITIAL_VAL_A);
 434         ctx->state[1] = readl(cpg->reg + DIGEST_INITIAL_VAL_B);
 435         ctx->state[2] = readl(cpg->reg + DIGEST_INITIAL_VAL_C);
 436         ctx->state[3] = readl(cpg->reg + DIGEST_INITIAL_VAL_D);
 437         ctx->state[4] = readl(cpg->reg + DIGEST_INITIAL_VAL_E);
 438 }
 439
 440 static void mv_hash_algo_completion(void)
 441 {
 442         struct ahash_request *req = ahash_request_cast(cpg->cur_req);
 443         struct mv_req_hash_ctx *ctx = ahash_request_ctx(req);
 444
 445         if (ctx->extra_bytes)
 446                 copy_src_to_buf(&cpg->p, ctx->buffer, ctx->extra_bytes);
 447         sg_miter_stop(&cpg->p.src_sg_it);
 448
 449         if (likely(ctx->last_chunk)) {
 450                 if (likely(ctx->count <= MAX_HW_HASH_SIZE)) {
 451                         memcpy(req->result, cpg->sram + SRAM_DIGEST_BUF,
 452                                crypto_ahash_digestsize(crypto_ahash_reqtfm
 453                                                        (req)));
 454                 } else {
 455                         mv_save_digest_state(ctx);
 456                         mv_hash_final_fallback(req);
 457                 }
 458         } else {
 459                 mv_save_digest_state(ctx);
 460         }
 461 }
 462
 463 static void dequeue_complete_req(void)
 464 {
 465         struct crypto_async_request *req = cpg->cur_req;
 466         void *buf;
 467         int ret;
 468         cpg->p.hw_processed_bytes += cpg->p.crypt_len;
 469         if (cpg->p.copy_back) {
 470                 int need_copy_len = cpg->p.crypt_len;
 471                 int sram_offset = 0;
 472                 do {
 473                         int dst_copy;
 474
 475                         if (!cpg->p.sg_dst_left) {
 476                                 ret = sg_miter_next(&cpg->p.dst_sg_it);
 477                                 BUG_ON(!ret);
 478                                 cpg->p.sg_dst_left = cpg->p.dst_sg_it.length;
 479                                 cpg->p.dst_start = 0;
 480                         }
 481
 482                         buf = cpg->p.dst_sg_it.addr;
 483                         buf += cpg->p.dst_start;
 484
 485                         dst_copy = min(need_copy_len, cpg->p.sg_dst_left);
 486
 487                         memcpy(buf,
 488                                cpg->sram + SRAM_DATA_OUT_START + sram_offset,
 489                                dst_copy);
 490                         sram_offset += dst_copy;
 491                         cpg->p.sg_dst_left -= dst_copy;
 492                         need_copy_len -= dst_copy;
 493                         cpg->p.dst_start += dst_copy;
 494                 } while (need_copy_len > 0);
 495         }
 496
 497         cpg->p.crypt_len = 0;
 498
 499         BUG_ON(cpg->eng_st != ENGINE_W_DEQUEUE);
 500         if (cpg->p.hw_processed_bytes < cpg->p.hw_nbytes) {
 501                 /* process next scatter list entry */
 502                 cpg->eng_st = ENGINE_BUSY;
 503                 cpg->p.process(0);
 504         } else {
 505                 cpg->p.complete();
 506                 cpg->eng_st = ENGINE_IDLE;
 507                 local_bh_disable();
 508                 req->complete(req, 0);
 509                 local_bh_enable();
 510         }
 511 }
 512
 513 static int count_sgs(struct scatterlist *sl, unsigned int total_bytes)
 514 {
 515         int i = 0;
 516         size_t cur_len;
 517
 518         while (sl) {
 519                 cur_len = sl[i].length;
 520                 ++i;
 521                 if (total_bytes > cur_len)
 522                         total_bytes -= cur_len;
 523                 else
 524                         break;
 525         }
 526
 527         return i;
 528 }
 529
 530 static void mv_start_new_crypt_req(struct ablkcipher_request *req)
 531 {
 532         struct req_progress *p = &cpg->p;
 533         int num_sgs;
 534
 535         cpg->cur_req = &req->base;
 536         memset(p, 0, sizeof(struct req_progress));
 537         p->hw_nbytes = req->nbytes;
 538         p->complete = mv_crypto_algo_completion;
 539         p->process = mv_process_current_q;
 540         p->copy_back = 1;
 541
 542         num_sgs = count_sgs(req->src, req->nbytes);
 543         sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG);
 544
 545         num_sgs = count_sgs(req->dst, req->nbytes);
 546         sg_miter_start(&p->dst_sg_it, req->dst, num_sgs, SG_MITER_TO_SG);
 547
 548         mv_process_current_q(1);
 549 }
 550
 551 static void mv_start_new_hash_req(struct ahash_request *req)
 552 {
 553         struct req_progress *p = &cpg->p;
 554         struct mv_req_hash_ctx *ctx = ahash_request_ctx(req);
 555         int num_sgs, hw_bytes, old_extra_bytes, rc;
 556         cpg->cur_req = &req->base;
 557         memset(p, 0, sizeof(struct req_progress));
 558         hw_bytes = req->nbytes + ctx->extra_bytes;
 559         old_extra_bytes = ctx->extra_bytes;
 560
 561         ctx->extra_bytes = hw_bytes % SHA1_BLOCK_SIZE;
 562         if (ctx->extra_bytes != 0
 563             && (!ctx->last_chunk || ctx->count > MAX_HW_HASH_SIZE))
 564                 hw_bytes -= ctx->extra_bytes;
 565         else
 566                 ctx->extra_bytes = 0;
 567
 568         num_sgs = count_sgs(req->src, req->nbytes);
 569         sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG);
 570
 571         if (hw_bytes) {
 572                 p->hw_nbytes = hw_bytes;
 573                 p->complete = mv_hash_algo_completion;
 574                 p->process = mv_process_hash_current;
 575
 576                 if (unlikely(old_extra_bytes)) {
 577                         memcpy(cpg->sram + SRAM_DATA_IN_START, ctx->buffer,
 578                                old_extra_bytes);
 579                         p->crypt_len = old_extra_bytes;
 580                 }
 581
 582                 mv_process_hash_current(1);
 583         } else {
 584                 copy_src_to_buf(p, ctx->buffer + old_extra_bytes,
 585                                 ctx->extra_bytes - old_extra_bytes);
 586                 sg_miter_stop(&p->src_sg_it);
 587                 if (ctx->last_chunk)
 588                         rc = mv_hash_final_fallback(req);
 589                 else
 590                         rc = 0;
 591                 cpg->eng_st = ENGINE_IDLE;
 592                 local_bh_disable();
 593                 req->base.complete(&req->base, rc);
 594                 local_bh_enable();
 595         }
 596 }
 597
 598 static int queue_manag(void *data)
 599 {
 600         cpg->eng_st = ENGINE_IDLE;
 601         do {
 602                 struct crypto_async_request *async_req = NULL;
 603                 struct crypto_async_request *backlog = NULL;
 604
 605                 __set_current_state(TASK_INTERRUPTIBLE);
 606
 607                 if (cpg->eng_st == ENGINE_W_DEQUEUE)
 608                         dequeue_complete_req();
 609
 610                 spin_lock_irq(&cpg->lock);
 611                 if (cpg->eng_st == ENGINE_IDLE) {
 612                         backlog = crypto_get_backlog(&cpg->queue);
 613                         async_req = crypto_dequeue_request(&cpg->queue);
 614                         if (async_req) {
 615                                 BUG_ON(cpg->eng_st != ENGINE_IDLE);
 616                                 cpg->eng_st = ENGINE_BUSY;
 617                         }
 618                 }
 619                 spin_unlock_irq(&cpg->lock);
 620
 621                 if (backlog) {
 622                         backlog->complete(backlog, -EINPROGRESS);
 623                         backlog = NULL;
 624                 }
 625
 626                 if (async_req) {
 627                         if (crypto_tfm_alg_type(async_req->tfm) !=
 628                             CRYPTO_ALG_TYPE_AHASH) {
 629                                 struct ablkcipher_request *req =
 630                                     ablkcipher_request_cast(async_req);
 631                                 mv_start_new_crypt_req(req);
 632                         } else {
 633                                 struct ahash_request *req =
 634                                     ahash_request_cast(async_req);
 635                                 mv_start_new_hash_req(req);
 636                         }
 637                         async_req = NULL;
 638                 }
 639
 640                 schedule();
 641
 642         } while (!kthread_should_stop());
 643         return 0;
 644 }
 645
 646 static int mv_handle_req(struct crypto_async_request *req)
 647 {
 648         unsigned long flags;
 649         int ret;
 650
 651         spin_lock_irqsave(&cpg->lock, flags);
 652         ret = crypto_enqueue_request(&cpg->queue, req);
 653         spin_unlock_irqrestore(&cpg->lock, flags);
 654         wake_up_process(cpg->queue_th);
 655         return ret;
 656 }
 657
 658 static int mv_enc_aes_ecb(struct ablkcipher_request *req)
 659 {
 660         struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
 661
 662         req_ctx->op = COP_AES_ECB;
 663         req_ctx->decrypt = 0;
 664
 665         return mv_handle_req(&req->base);
 666 }
 667
 668 static int mv_dec_aes_ecb(struct ablkcipher_request *req)
 669 {
 670         struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 671         struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
 672
 673         req_ctx->op = COP_AES_ECB;
 674         req_ctx->decrypt = 1;
 675
 676         compute_aes_dec_key(ctx);
 677         return mv_handle_req(&req->base);
 678 }
 679
 680 static int mv_enc_aes_cbc(struct ablkcipher_request *req)
 681 {
 682         struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
 683
 684         req_ctx->op = COP_AES_CBC;
 685         req_ctx->decrypt = 0;
 686
 687         return mv_handle_req(&req->base);
 688 }
 689
 690 static int mv_dec_aes_cbc(struct ablkcipher_request *req)
 691 {
 692         struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
 693         struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
 694
 695         req_ctx->op = COP_AES_CBC;
 696         req_ctx->decrypt = 1;
 697
 698         compute_aes_dec_key(ctx);
 699         return mv_handle_req(&req->base);
 700 }
 701
 702 static int mv_cra_init(struct crypto_tfm *tfm)
 703 {
 704         tfm->crt_ablkcipher.reqsize = sizeof(struct mv_req_ctx);
 705         return 0;
 706 }
 707
 708 static void mv_init_hash_req_ctx(struct mv_req_hash_ctx *ctx, int op,
 709                                  int is_last, unsigned int req_len,
 710                                  int count_add)
 711 {
 712         memset(ctx, 0, sizeof(*ctx));
 713         ctx->op = op;
 714         ctx->count = req_len;
 715         ctx->first_hash = 1;
 716         ctx->last_chunk = is_last;
 717         ctx->count_add = count_add;
 718 }
 719
 720 static void mv_update_hash_req_ctx(struct mv_req_hash_ctx *ctx, int is_last,
 721                                    unsigned req_len)
 722 {
 723         ctx->last_chunk = is_last;
 724         ctx->count += req_len;
 725 }
 726
 727 static int mv_hash_init(struct ahash_request *req)
 728 {
 729         const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm);
 730         mv_init_hash_req_ctx(ahash_request_ctx(req), tfm_ctx->op, 0, 0,
 731                              tfm_ctx->count_add);
 732         return 0;
 733 }
 734
 735 static int mv_hash_update(struct ahash_request *req)
 736 {
 737         if (!req->nbytes)
 738                 return 0;
 739
 740         mv_update_hash_req_ctx(ahash_request_ctx(req), 0, req->nbytes);
 741         return mv_handle_req(&req->base);
 742 }
 743
 744 static int mv_hash_final(struct ahash_request *req)
 745 {
 746         struct mv_req_hash_ctx *ctx = ahash_request_ctx(req);
 747
 748         ahash_request_set_crypt(req, NULL, req->result, 0);
 749         mv_update_hash_req_ctx(ctx, 1, 0);
 750         return mv_handle_req(&req->base);
 751 }
 752
 753 static int mv_hash_finup(struct ahash_request *req)
 754 {
 755         mv_update_hash_req_ctx(ahash_request_ctx(req), 1, req->nbytes);
 756         return mv_handle_req(&req->base);
 757 }
 758
 759 static int mv_hash_digest(struct ahash_request *req)
 760 {
 761         const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm);
 762         mv_init_hash_req_ctx(ahash_request_ctx(req), tfm_ctx->op, 1,
 763                              req->nbytes, tfm_ctx->count_add);
 764         return mv_handle_req(&req->base);
 765 }
 766
 767 static void mv_hash_init_ivs(struct mv_tfm_hash_ctx *ctx, const void *istate,
 768                              const void *ostate)
 769 {
 770         const struct sha1_state *isha1_state = istate, *osha1_state = ostate;
 771         int i;
 772         for (i = 0; i < 5; i++) {
 773                 ctx->ivs[i] = cpu_to_be32(isha1_state->state[i]);
 774                 ctx->ivs[i + 5] = cpu_to_be32(osha1_state->state[i]);
 775         }
 776 }
 777
 778 static int mv_hash_setkey(struct crypto_ahash *tfm, const u8 * key,
 779                           unsigned int keylen)
 780 {
 781         int rc;
 782         struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(&tfm->base);
 783         int bs, ds, ss;
 784
 785         if (!ctx->base_hash)
 786                 return 0;
 787
 788         rc = crypto_shash_setkey(ctx->fallback, key, keylen);
 789         if (rc)
 790                 return rc;
 791
 792         /* Can't see a way to extract the ipad/opad from the fallback tfm
 793            so I'm basically copying code from the hmac module */
 794         bs = crypto_shash_blocksize(ctx->base_hash);
 795         ds = crypto_shash_digestsize(ctx->base_hash);
 796         ss = crypto_shash_statesize(ctx->base_hash);
 797
 798         {
 799                 SHASH_DESC_ON_STACK(shash, ctx->base_hash);
 800
 801                 unsigned int i;
 802                 char ipad[ss];
 803                 char opad[ss];
 804
 805                 shash->tfm = ctx->base_hash;
 806                 shash->flags = crypto_shash_get_flags(ctx->base_hash) &
 807                     CRYPTO_TFM_REQ_MAY_SLEEP;
 808
 809                 if (keylen > bs) {
 810                         int err;
 811
 812                         err =
 813                             crypto_shash_digest(shash, key, keylen, ipad);
 814                         if (err)
 815                                 return err;
 816
 817                         keylen = ds;
 818                 } else
 819                         memcpy(ipad, key, keylen);
 820
 821                 memset(ipad + keylen, 0, bs - keylen);
 822                 memcpy(opad, ipad, bs);
 823
 824                 for (i = 0; i < bs; i++) {
 825                         ipad[i] ^= 0x36;
 826                         opad[i] ^= 0x5c;
 827                 }
 828
 829                 rc = crypto_shash_init(shash) ? :
 830                     crypto_shash_update(shash, ipad, bs) ? :
 831                     crypto_shash_export(shash, ipad) ? :
 832                     crypto_shash_init(shash) ? :
 833                     crypto_shash_update(shash, opad, bs) ? :
 834                     crypto_shash_export(shash, opad);
 835
 836                 if (rc == 0)
 837                         mv_hash_init_ivs(ctx, ipad, opad);
 838
 839                 return rc;
 840         }
 841 }
 842
 843 static int mv_cra_hash_init(struct crypto_tfm *tfm, const char *base_hash_name,
 844                             enum hash_op op, int count_add)
 845 {
 846         const char *fallback_driver_name = crypto_tfm_alg_name(tfm);
 847         struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(tfm);
 848         struct crypto_shash *fallback_tfm = NULL;
 849         struct crypto_shash *base_hash = NULL;
 850         int err = -ENOMEM;
 851
 852         ctx->op = op;
 853         ctx->count_add = count_add;
 854
 855         /* Allocate a fallback and abort if it failed. */
 856         fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0,
 857                                           CRYPTO_ALG_NEED_FALLBACK);
 858         if (IS_ERR(fallback_tfm)) {
 859                 printk(KERN_WARNING MV_CESA
 860                        "Fallback driver '%s' could not be loaded!\n",
 861                        fallback_driver_name);
 862                 err = PTR_ERR(fallback_tfm);
 863                 goto out;
 864         }
 865         ctx->fallback = fallback_tfm;
 866
 867         if (base_hash_name) {
 868                 /* Allocate a hash to compute the ipad/opad of hmac. */
 869                 base_hash = crypto_alloc_shash(base_hash_name, 0,
 870                                                CRYPTO_ALG_NEED_FALLBACK);
 871                 if (IS_ERR(base_hash)) {
 872                         printk(KERN_WARNING MV_CESA
 873                                "Base driver '%s' could not be loaded!\n",
 874                                base_hash_name);
 875                         err = PTR_ERR(base_hash);
 876                         goto err_bad_base;
 877                 }
 878         }
 879         ctx->base_hash = base_hash;
 880
 881         crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
 882                                  sizeof(struct mv_req_hash_ctx) +
 883                                  crypto_shash_descsize(ctx->fallback));
 884         return 0;
 885 err_bad_base:
 886         crypto_free_shash(fallback_tfm);
 887 out:
 888         return err;
 889 }
 890
 891 static void mv_cra_hash_exit(struct crypto_tfm *tfm)
 892 {
 893         struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(tfm);
 894
 895         crypto_free_shash(ctx->fallback);
 896         if (ctx->base_hash)
 897                 crypto_free_shash(ctx->base_hash);
 898 }
 899
 900 static int mv_cra_hash_sha1_init(struct crypto_tfm *tfm)
 901 {
 902         return mv_cra_hash_init(tfm, NULL, COP_SHA1, 0);
 903 }
 904
 905 static int mv_cra_hash_hmac_sha1_init(struct crypto_tfm *tfm)
 906 {
 907         return mv_cra_hash_init(tfm, "sha1", COP_HMAC_SHA1, SHA1_BLOCK_SIZE);
 908 }
 909
 910 static irqreturn_t crypto_int(int irq, void *priv)
 911 {
 912         u32 val;
 913
 914         val = readl(cpg->reg + SEC_ACCEL_INT_STATUS);
 915         if (!(val & SEC_INT_ACCEL0_DONE))
 916                 return IRQ_NONE;
 917
 918         if (!del_timer(&cpg->completion_timer)) {
 919                 printk(KERN_WARNING MV_CESA
 920                        "got an interrupt but no pending timer?\n");
 921         }
 922         val &= ~SEC_INT_ACCEL0_DONE;
 923         writel(val, cpg->reg + FPGA_INT_STATUS);
 924         writel(val, cpg->reg + SEC_ACCEL_INT_STATUS);
 925         BUG_ON(cpg->eng_st != ENGINE_BUSY);
 926         cpg->eng_st = ENGINE_W_DEQUEUE;
 927         wake_up_process(cpg->queue_th);
 928         return IRQ_HANDLED;
 929 }
 930
 931 static struct crypto_alg mv_aes_alg_ecb = {
 932         .cra_name               = "ecb(aes)",
 933         .cra_driver_name        = "mv-ecb-aes",
 934         .cra_priority   = 300,
 935         .cra_flags      = CRYPTO_ALG_TYPE_ABLKCIPHER |
 936                           CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 937         .cra_blocksize  = 16,
 938         .cra_ctxsize    = sizeof(struct mv_ctx),
 939         .cra_alignmask  = 0,
 940         .cra_type       = &crypto_ablkcipher_type,
 941         .cra_module     = THIS_MODULE,
 942         .cra_init       = mv_cra_init,
 943         .cra_u          = {
 944                 .ablkcipher = {
 945                         .min_keysize    =       AES_MIN_KEY_SIZE,
 946                         .max_keysize    =       AES_MAX_KEY_SIZE,
 947                         .setkey         =       mv_setkey_aes,
 948                         .encrypt        =       mv_enc_aes_ecb,
 949                         .decrypt        =       mv_dec_aes_ecb,
 950                 },
 951         },
 952 };
 953
 954 static struct crypto_alg mv_aes_alg_cbc = {
 955         .cra_name               = "cbc(aes)",
 956         .cra_driver_name        = "mv-cbc-aes",
 957         .cra_priority   = 300,
 958         .cra_flags      = CRYPTO_ALG_TYPE_ABLKCIPHER |
 959                           CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
 960         .cra_blocksize  = AES_BLOCK_SIZE,
 961         .cra_ctxsize    = sizeof(struct mv_ctx),
 962         .cra_alignmask  = 0,
 963         .cra_type       = &crypto_ablkcipher_type,
 964         .cra_module     = THIS_MODULE,
 965         .cra_init       = mv_cra_init,
 966         .cra_u          = {
 967                 .ablkcipher = {
 968                         .ivsize         =       AES_BLOCK_SIZE,
 969                         .min_keysize    =       AES_MIN_KEY_SIZE,
 970                         .max_keysize    =       AES_MAX_KEY_SIZE,
 971                         .setkey         =       mv_setkey_aes,
 972                         .encrypt        =       mv_enc_aes_cbc,
 973                         .decrypt        =       mv_dec_aes_cbc,
 974                 },
 975         },
 976 };
 977
 978 static struct ahash_alg mv_sha1_alg = {
 979         .init = mv_hash_init,
 980         .update = mv_hash_update,
 981         .final = mv_hash_final,
 982         .finup = mv_hash_finup,
 983         .digest = mv_hash_digest,
 984         .halg = {
 985                  .digestsize = SHA1_DIGEST_SIZE,
 986                  .base = {
 987                           .cra_name = "sha1",
 988                           .cra_driver_name = "mv-sha1",
 989                           .cra_priority = 300,
 990                           .cra_flags =
 991                           CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY |
 992                           CRYPTO_ALG_NEED_FALLBACK,
 993                           .cra_blocksize = SHA1_BLOCK_SIZE,
 994                           .cra_ctxsize = sizeof(struct mv_tfm_hash_ctx),
 995                           .cra_init = mv_cra_hash_sha1_init,
 996                           .cra_exit = mv_cra_hash_exit,
 997                           .cra_module = THIS_MODULE,
 998                           }
 999                  }
1000 };
1001
1002 static struct ahash_alg mv_hmac_sha1_alg = {
1003         .init = mv_hash_init,
1004         .update = mv_hash_update,
1005         .final = mv_hash_final,
1006         .finup = mv_hash_finup,
1007         .digest = mv_hash_digest,
1008         .setkey = mv_hash_setkey,
1009         .halg = {
1010                  .digestsize = SHA1_DIGEST_SIZE,
1011                  .base = {
1012                           .cra_name = "hmac(sha1)",
1013                           .cra_driver_name = "mv-hmac-sha1",
1014                           .cra_priority = 300,
1015                           .cra_flags =
1016                           CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY |
1017                           CRYPTO_ALG_NEED_FALLBACK,
1018                           .cra_blocksize = SHA1_BLOCK_SIZE,
1019                           .cra_ctxsize = sizeof(struct mv_tfm_hash_ctx),
1020                           .cra_init = mv_cra_hash_hmac_sha1_init,
1021                           .cra_exit = mv_cra_hash_exit,
1022                           .cra_module = THIS_MODULE,
1023                           }
1024                  }
1025 };
1026
1027 static int mv_cesa_get_sram(struct platform_device *pdev,
1028                             struct crypto_priv *cp)
1029 {
1030         struct resource *res;
1031         u32 sram_size = MV_CESA_DEFAULT_SRAM_SIZE;
1032
1033         of_property_read_u32(pdev->dev.of_node, "marvell,crypto-sram-size",
1034                              &sram_size);
1035
1036         cp->sram_size = sram_size;
1037         cp->sram_pool = of_get_named_gen_pool(pdev->dev.of_node,
1038                                               "marvell,crypto-srams", 0);
1039         if (cp->sram_pool) {
1040                 cp->sram = gen_pool_dma_alloc(cp->sram_pool, sram_size,
1041                                               &cp->sram_dma);
1042                 if (cp->sram)
1043                         return 0;
1044
1045                 return -ENOMEM;
1046         }
1047
1048         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1049                                            "sram");
1050         if (!res || resource_size(res) < cp->sram_size)
1051                 return -EINVAL;
1052
1053         cp->sram = devm_ioremap_resource(&pdev->dev, res);
1054         if (IS_ERR(cp->sram))
1055                 return PTR_ERR(cp->sram);
1056
1057         return 0;
1058 }
1059
1060 static int mv_probe(struct platform_device *pdev)
1061 {
1062         struct crypto_priv *cp;
1063         struct resource *res;
1064         int irq;
1065         int ret;
1066
1067         if (cpg) {
1068                 printk(KERN_ERR MV_CESA "Second crypto dev?\n");
1069                 return -EEXIST;
1070         }
1071
1072         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
1073         if (!res)
1074                 return -ENXIO;
1075
1076         cp = kzalloc(sizeof(*cp), GFP_KERNEL);
1077         if (!cp)
1078                 return -ENOMEM;
1079
1080         spin_lock_init(&cp->lock);
1081         crypto_init_queue(&cp->queue, 50);
1082         cp->reg = devm_ioremap_resource(&pdev->dev, res);
1083         if (IS_ERR(cp->reg)) {
1084                 ret = PTR_ERR(cp->reg);
1085                 goto err;
1086         }
1087
1088         ret = mv_cesa_get_sram(pdev, cp);
1089         if (ret)
1090                 goto err;
1091
1092         cp->max_req_size = cp->sram_size - SRAM_CFG_SPACE;
1093
1094         if (pdev->dev.of_node)
1095                 irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1096         else
1097                 irq = platform_get_irq(pdev, 0);
1098         if (irq < 0 || irq == NO_IRQ) {
1099                 ret = irq;
1100                 goto err;
1101         }
1102         cp->irq = irq;
1103
1104         platform_set_drvdata(pdev, cp);
1105         cpg = cp;
1106
1107         cp->queue_th = kthread_run(queue_manag, cp, "mv_crypto");
1108         if (IS_ERR(cp->queue_th)) {
1109                 ret = PTR_ERR(cp->queue_th);
1110                 goto err;
1111         }
1112
1113         ret = request_irq(irq, crypto_int, 0, dev_name(&pdev->dev),
1114                         cp);
1115         if (ret)
1116                 goto err_thread;
1117
1118         /* Not all platforms can gate the clock, so it is not
1119            an error if the clock does not exists. */
1120         cp->clk = clk_get(&pdev->dev, NULL);
1121         if (!IS_ERR(cp->clk))
1122                 clk_prepare_enable(cp->clk);
1123
1124         writel(0, cpg->reg + SEC_ACCEL_INT_STATUS);
1125         writel(SEC_INT_ACCEL0_DONE, cpg->reg + SEC_ACCEL_INT_MASK);
1126         writel(SEC_CFG_STOP_DIG_ERR, cpg->reg + SEC_ACCEL_CFG);
1127         writel(SRAM_CONFIG, cpg->reg + SEC_ACCEL_DESC_P0);
1128
1129         ret = crypto_register_alg(&mv_aes_alg_ecb);
1130         if (ret) {
1131                 printk(KERN_WARNING MV_CESA
1132                        "Could not register aes-ecb driver\n");
1133                 goto err_irq;
1134         }
1135
1136         ret = crypto_register_alg(&mv_aes_alg_cbc);
1137         if (ret) {
1138                 printk(KERN_WARNING MV_CESA
1139                        "Could not register aes-cbc driver\n");
1140                 goto err_unreg_ecb;
1141         }
1142
1143         ret = crypto_register_ahash(&mv_sha1_alg);
1144         if (ret == 0)
1145                 cpg->has_sha1 = 1;
1146         else
1147                 printk(KERN_WARNING MV_CESA "Could not register sha1 driver\n");
1148
1149         ret = crypto_register_ahash(&mv_hmac_sha1_alg);
1150         if (ret == 0) {
1151                 cpg->has_hmac_sha1 = 1;
1152         } else {
1153                 printk(KERN_WARNING MV_CESA
1154                        "Could not register hmac-sha1 driver\n");
1155         }
1156
1157         return 0;
1158 err_unreg_ecb:
1159         crypto_unregister_alg(&mv_aes_alg_ecb);
1160 err_irq:
1161         free_irq(irq, cp);
1162         if (!IS_ERR(cp->clk)) {
1163                 clk_disable_unprepare(cp->clk);
1164                 clk_put(cp->clk);
1165         }
1166 err_thread:
1167         kthread_stop(cp->queue_th);
1168 err:
1169         kfree(cp);
1170         cpg = NULL;
1171         return ret;
1172 }
1173
1174 static int mv_remove(struct platform_device *pdev)
1175 {
1176         struct crypto_priv *cp = platform_get_drvdata(pdev);
1177
1178         crypto_unregister_alg(&mv_aes_alg_ecb);
1179         crypto_unregister_alg(&mv_aes_alg_cbc);
1180         if (cp->has_sha1)
1181                 crypto_unregister_ahash(&mv_sha1_alg);
1182         if (cp->has_hmac_sha1)
1183                 crypto_unregister_ahash(&mv_hmac_sha1_alg);
1184         kthread_stop(cp->queue_th);
1185         free_irq(cp->irq, cp);
1186         memset(cp->sram, 0, cp->sram_size);
1187
1188         if (!IS_ERR(cp->clk)) {
1189                 clk_disable_unprepare(cp->clk);
1190                 clk_put(cp->clk);
1191         }
1192
1193         kfree(cp);
1194         cpg = NULL;
1195         return 0;
1196 }
1197
1198 static const struct of_device_id mv_cesa_of_match_table[] = {
1199         { .compatible = "marvell,orion-crypto", },
1200         { .compatible = "marvell,kirkwood-crypto", },
1201         { .compatible = "marvell,dove-crypto", },
1202         {}
1203 };
1204 MODULE_DEVICE_TABLE(of, mv_cesa_of_match_table);
1205
1206 static struct platform_driver marvell_crypto = {
1207         .probe          = mv_probe,
1208         .remove         = mv_remove,
1209         .driver         = {
1210                 .name   = "mv_crypto",
1211                 .of_match_table = mv_cesa_of_match_table,
1212         },
1213 };
1214 MODULE_ALIAS("platform:mv_crypto");
1215
1216 module_platform_driver(marvell_crypto);
1217
1218 MODULE_AUTHOR("Sebastian Andrzej Siewior <sebastian@breakpoint.cc>");
1219 MODULE_DESCRIPTION("Support for Marvell's cryptographic engine");
1220 MODULE_LICENSE("GPL");