drivers/crypto/omap-aes.c

   1 /*
   2  * Cryptographic API.
   3  *
   4  * Support for OMAP AES HW acceleration.
   5  *
   6  * Copyright (c) 2010 Nokia Corporation
   7  * Author: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
   8  * Copyright (c) 2011 Texas Instruments Incorporated
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as published
  12  * by the Free Software Foundation.
  13  *
  14  */
  15
  16 #define pr_fmt(fmt) "%20s: " fmt, __func__
  17 #define prn(num) pr_debug(#num "=%d\n", num)
  18 #define prx(num) pr_debug(#num "=%x\n", num)
  19
  20 #include <linux/err.h>
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/errno.h>
  24 #include <linux/kernel.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/scatterlist.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/dmaengine.h>
  29 #include <linux/pm_runtime.h>
  30 #include <linux/of.h>
  31 #include <linux/of_device.h>
  32 #include <linux/of_address.h>
  33 #include <linux/io.h>
  34 #include <linux/crypto.h>
  35 #include <linux/interrupt.h>
  36 #include <crypto/scatterwalk.h>
  37 #include <crypto/aes.h>
  38 #include <crypto/gcm.h>
  39 #include <crypto/engine.h>
  40 #include <crypto/internal/skcipher.h>
  41 #include <crypto/internal/aead.h>
  42
  43 #include "omap-crypto.h"
  44 #include "omap-aes.h"
  45
  46 /* keep registered devices data here */
  47 static LIST_HEAD(dev_list);
  48 static DEFINE_SPINLOCK(list_lock);
  49
  50 static int aes_fallback_sz = 200;
  51
  52 #ifdef DEBUG
  53 #define omap_aes_read(dd, offset)                               \
  54 ({                                                              \
  55         int _read_ret;                                          \
  56         _read_ret = __raw_readl(dd->io_base + offset);          \
  57         pr_debug("omap_aes_read(" #offset "=%#x)= %#x\n",       \
  58                  offset, _read_ret);                            \
  59         _read_ret;                                              \
  60 })
  61 #else
  62 inline u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset)
  63 {
  64         return __raw_readl(dd->io_base + offset);
  65 }
  66 #endif
  67
  68 #ifdef DEBUG
  69 #define omap_aes_write(dd, offset, value)                               \
  70         do {                                                            \
  71                 pr_debug("omap_aes_write(" #offset "=%#x) value=%#x\n", \
  72                          offset, value);                                \
  73                 __raw_writel(value, dd->io_base + offset);              \
  74         } while (0)
  75 #else
  76 inline void omap_aes_write(struct omap_aes_dev *dd, u32 offset,
  77                                   u32 value)
  78 {
  79         __raw_writel(value, dd->io_base + offset);
  80 }
  81 #endif
  82
  83 static inline void omap_aes_write_mask(struct omap_aes_dev *dd, u32 offset,
  84                                         u32 value, u32 mask)
  85 {
  86         u32 val;
  87
  88         val = omap_aes_read(dd, offset);
  89         val &= ~mask;
  90         val |= value;
  91         omap_aes_write(dd, offset, val);
  92 }
  93
  94 static void omap_aes_write_n(struct omap_aes_dev *dd, u32 offset,
  95                                         u32 *value, int count)
  96 {
  97         for (; count--; value++, offset += 4)
  98                 omap_aes_write(dd, offset, *value);
  99 }
 100
 101 static int omap_aes_hw_init(struct omap_aes_dev *dd)
 102 {
 103         int err;
 104
 105         if (!(dd->flags & FLAGS_INIT)) {
 106                 dd->flags |= FLAGS_INIT;
 107                 dd->err = 0;
 108         }
 109
 110         err = pm_runtime_get_sync(dd->dev);
 111         if (err < 0) {
 112                 dev_err(dd->dev, "failed to get sync: %d\n", err);
 113                 return err;
 114         }
 115
 116         return 0;
 117 }
 118
 119 void omap_aes_clear_copy_flags(struct omap_aes_dev *dd)
 120 {
 121         dd->flags &= ~(OMAP_CRYPTO_COPY_MASK << FLAGS_IN_DATA_ST_SHIFT);
 122         dd->flags &= ~(OMAP_CRYPTO_COPY_MASK << FLAGS_OUT_DATA_ST_SHIFT);
 123         dd->flags &= ~(OMAP_CRYPTO_COPY_MASK << FLAGS_ASSOC_DATA_ST_SHIFT);
 124 }
 125
 126 int omap_aes_write_ctrl(struct omap_aes_dev *dd)
 127 {
 128         struct omap_aes_reqctx *rctx;
 129         unsigned int key32;
 130         int i, err;
 131         u32 val;
 132
 133         err = omap_aes_hw_init(dd);
 134         if (err)
 135                 return err;
 136
 137         key32 = dd->ctx->keylen / sizeof(u32);
 138
 139         /* RESET the key as previous HASH keys should not get affected*/
 140         if (dd->flags & FLAGS_GCM)
 141                 for (i = 0; i < 0x40; i = i + 4)
 142                         omap_aes_write(dd, i, 0x0);
 143
 144         for (i = 0; i < key32; i++) {
 145                 omap_aes_write(dd, AES_REG_KEY(dd, i),
 146                         __le32_to_cpu(dd->ctx->key[i]));
 147         }
 148
 149         if ((dd->flags & (FLAGS_CBC | FLAGS_CTR)) && dd->req->info)
 150                 omap_aes_write_n(dd, AES_REG_IV(dd, 0), dd->req->info, 4);
 151
 152         if ((dd->flags & (FLAGS_GCM)) && dd->aead_req->iv) {
 153                 rctx = aead_request_ctx(dd->aead_req);
 154                 omap_aes_write_n(dd, AES_REG_IV(dd, 0), (u32 *)rctx->iv, 4);
 155         }
 156
 157         val = FLD_VAL(((dd->ctx->keylen >> 3) - 1), 4, 3);
 158         if (dd->flags & FLAGS_CBC)
 159                 val |= AES_REG_CTRL_CBC;
 160
 161         if (dd->flags & (FLAGS_CTR | FLAGS_GCM))
 162                 val |= AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_128;
 163
 164         if (dd->flags & FLAGS_GCM)
 165                 val |= AES_REG_CTRL_GCM;
 166
 167         if (dd->flags & FLAGS_ENCRYPT)
 168                 val |= AES_REG_CTRL_DIRECTION;
 169
 170         omap_aes_write_mask(dd, AES_REG_CTRL(dd), val, AES_REG_CTRL_MASK);
 171
 172         return 0;
 173 }
 174
 175 static void omap_aes_dma_trigger_omap2(struct omap_aes_dev *dd, int length)
 176 {
 177         u32 mask, val;
 178
 179         val = dd->pdata->dma_start;
 180
 181         if (dd->dma_lch_out != NULL)
 182                 val |= dd->pdata->dma_enable_out;
 183         if (dd->dma_lch_in != NULL)
 184                 val |= dd->pdata->dma_enable_in;
 185
 186         mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
 187                dd->pdata->dma_start;
 188
 189         omap_aes_write_mask(dd, AES_REG_MASK(dd), val, mask);
 190
 191 }
 192
 193 static void omap_aes_dma_trigger_omap4(struct omap_aes_dev *dd, int length)
 194 {
 195         omap_aes_write(dd, AES_REG_LENGTH_N(0), length);
 196         omap_aes_write(dd, AES_REG_LENGTH_N(1), 0);
 197         if (dd->flags & FLAGS_GCM)
 198                 omap_aes_write(dd, AES_REG_A_LEN, dd->assoc_len);
 199
 200         omap_aes_dma_trigger_omap2(dd, length);
 201 }
 202
 203 static void omap_aes_dma_stop(struct omap_aes_dev *dd)
 204 {
 205         u32 mask;
 206
 207         mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
 208                dd->pdata->dma_start;
 209
 210         omap_aes_write_mask(dd, AES_REG_MASK(dd), 0, mask);
 211 }
 212
 213 struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_reqctx *rctx)
 214 {
 215         struct omap_aes_dev *dd;
 216
 217         spin_lock_bh(&list_lock);
 218         dd = list_first_entry(&dev_list, struct omap_aes_dev, list);
 219         list_move_tail(&dd->list, &dev_list);
 220         rctx->dd = dd;
 221         spin_unlock_bh(&list_lock);
 222
 223         return dd;
 224 }
 225
 226 static void omap_aes_dma_out_callback(void *data)
 227 {
 228         struct omap_aes_dev *dd = data;
 229
 230         /* dma_lch_out - completed */
 231         tasklet_schedule(&dd->done_task);
 232 }
 233
 234 static int omap_aes_dma_init(struct omap_aes_dev *dd)
 235 {
 236         int err;
 237
 238         dd->dma_lch_out = NULL;
 239         dd->dma_lch_in = NULL;
 240
 241         dd->dma_lch_in = dma_request_chan(dd->dev, "rx");
 242         if (IS_ERR(dd->dma_lch_in)) {
 243                 dev_err(dd->dev, "Unable to request in DMA channel\n");
 244                 return PTR_ERR(dd->dma_lch_in);
 245         }
 246
 247         dd->dma_lch_out = dma_request_chan(dd->dev, "tx");
 248         if (IS_ERR(dd->dma_lch_out)) {
 249                 dev_err(dd->dev, "Unable to request out DMA channel\n");
 250                 err = PTR_ERR(dd->dma_lch_out);
 251                 goto err_dma_out;
 252         }
 253
 254         return 0;
 255
 256 err_dma_out:
 257         dma_release_channel(dd->dma_lch_in);
 258
 259         return err;
 260 }
 261
 262 static void omap_aes_dma_cleanup(struct omap_aes_dev *dd)
 263 {
 264         if (dd->pio_only)
 265                 return;
 266
 267         dma_release_channel(dd->dma_lch_out);
 268         dma_release_channel(dd->dma_lch_in);
 269 }
 270
 271 static int omap_aes_crypt_dma(struct omap_aes_dev *dd,
 272                               struct scatterlist *in_sg,
 273                               struct scatterlist *out_sg,
 274                               int in_sg_len, int out_sg_len)
 275 {
 276         struct dma_async_tx_descriptor *tx_in, *tx_out;
 277         struct dma_slave_config cfg;
 278         int ret;
 279
 280         if (dd->pio_only) {
 281                 scatterwalk_start(&dd->in_walk, dd->in_sg);
 282                 scatterwalk_start(&dd->out_walk, dd->out_sg);
 283
 284                 /* Enable DATAIN interrupt and let it take
 285                    care of the rest */
 286                 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2);
 287                 return 0;
 288         }
 289
 290         dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE);
 291
 292         memset(&cfg, 0, sizeof(cfg));
 293
 294         cfg.src_addr = dd->phys_base + AES_REG_DATA_N(dd, 0);
 295         cfg.dst_addr = dd->phys_base + AES_REG_DATA_N(dd, 0);
 296         cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 297         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 298         cfg.src_maxburst = DST_MAXBURST;
 299         cfg.dst_maxburst = DST_MAXBURST;
 300
 301         /* IN */
 302         ret = dmaengine_slave_config(dd->dma_lch_in, &cfg);
 303         if (ret) {
 304                 dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n",
 305                         ret);
 306                 return ret;
 307         }
 308
 309         tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, in_sg_len,
 310                                         DMA_MEM_TO_DEV,
 311                                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 312         if (!tx_in) {
 313                 dev_err(dd->dev, "IN prep_slave_sg() failed\n");
 314                 return -EINVAL;
 315         }
 316
 317         /* No callback necessary */
 318         tx_in->callback_param = dd;
 319
 320         /* OUT */
 321         ret = dmaengine_slave_config(dd->dma_lch_out, &cfg);
 322         if (ret) {
 323                 dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n",
 324                         ret);
 325                 return ret;
 326         }
 327
 328         tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, out_sg_len,
 329                                         DMA_DEV_TO_MEM,
 330                                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 331         if (!tx_out) {
 332                 dev_err(dd->dev, "OUT prep_slave_sg() failed\n");
 333                 return -EINVAL;
 334         }
 335
 336         if (dd->flags & FLAGS_GCM)
 337                 tx_out->callback = omap_aes_gcm_dma_out_callback;
 338         else
 339                 tx_out->callback = omap_aes_dma_out_callback;
 340         tx_out->callback_param = dd;
 341
 342         dmaengine_submit(tx_in);
 343         dmaengine_submit(tx_out);
 344
 345         dma_async_issue_pending(dd->dma_lch_in);
 346         dma_async_issue_pending(dd->dma_lch_out);
 347
 348         /* start DMA */
 349         dd->pdata->trigger(dd, dd->total);
 350
 351         return 0;
 352 }
 353
 354 int omap_aes_crypt_dma_start(struct omap_aes_dev *dd)
 355 {
 356         int err;
 357
 358         pr_debug("total: %d\n", dd->total);
 359
 360         if (!dd->pio_only) {
 361                 err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len,
 362                                  DMA_TO_DEVICE);
 363                 if (!err) {
 364                         dev_err(dd->dev, "dma_map_sg() error\n");
 365                         return -EINVAL;
 366                 }
 367
 368                 err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len,
 369                                  DMA_FROM_DEVICE);
 370                 if (!err) {
 371                         dev_err(dd->dev, "dma_map_sg() error\n");
 372                         return -EINVAL;
 373                 }
 374         }
 375
 376         err = omap_aes_crypt_dma(dd, dd->in_sg, dd->out_sg, dd->in_sg_len,
 377                                  dd->out_sg_len);
 378         if (err && !dd->pio_only) {
 379                 dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
 380                 dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len,
 381                              DMA_FROM_DEVICE);
 382         }
 383
 384         return err;
 385 }
 386
 387 static void omap_aes_finish_req(struct omap_aes_dev *dd, int err)
 388 {
 389         struct ablkcipher_request *req = dd->req;
 390
 391         pr_debug("err: %d\n", err);
 392
 393         crypto_finalize_ablkcipher_request(dd->engine, req, err);
 394
 395         pm_runtime_mark_last_busy(dd->dev);
 396         pm_runtime_put_autosuspend(dd->dev);
 397 }
 398
 399 int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd)
 400 {
 401         pr_debug("total: %d\n", dd->total);
 402
 403         omap_aes_dma_stop(dd);
 404
 405
 406         return 0;
 407 }
 408
 409 static int omap_aes_handle_queue(struct omap_aes_dev *dd,
 410                                  struct ablkcipher_request *req)
 411 {
 412         if (req)
 413                 return crypto_transfer_ablkcipher_request_to_engine(dd->engine, req);
 414
 415         return 0;
 416 }
 417
 418 static int omap_aes_prepare_req(struct crypto_engine *engine,
 419                                 void *areq)
 420 {
 421         struct ablkcipher_request *req = container_of(areq, struct ablkcipher_request, base);
 422         struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(
 423                         crypto_ablkcipher_reqtfm(req));
 424         struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req);
 425         struct omap_aes_dev *dd = rctx->dd;
 426         int ret;
 427         u16 flags;
 428
 429         if (!dd)
 430                 return -ENODEV;
 431
 432         /* assign new request to device */
 433         dd->req = req;
 434         dd->total = req->nbytes;
 435         dd->total_save = req->nbytes;
 436         dd->in_sg = req->src;
 437         dd->out_sg = req->dst;
 438         dd->orig_out = req->dst;
 439
 440         flags = OMAP_CRYPTO_COPY_DATA;
 441         if (req->src == req->dst)
 442                 flags |= OMAP_CRYPTO_FORCE_COPY;
 443
 444         ret = omap_crypto_align_sg(&dd->in_sg, dd->total, AES_BLOCK_SIZE,
 445                                    dd->in_sgl, flags,
 446                                    FLAGS_IN_DATA_ST_SHIFT, &dd->flags);
 447         if (ret)
 448                 return ret;
 449
 450         ret = omap_crypto_align_sg(&dd->out_sg, dd->total, AES_BLOCK_SIZE,
 451                                    &dd->out_sgl, 0,
 452                                    FLAGS_OUT_DATA_ST_SHIFT, &dd->flags);
 453         if (ret)
 454                 return ret;
 455
 456         dd->in_sg_len = sg_nents_for_len(dd->in_sg, dd->total);
 457         if (dd->in_sg_len < 0)
 458                 return dd->in_sg_len;
 459
 460         dd->out_sg_len = sg_nents_for_len(dd->out_sg, dd->total);
 461         if (dd->out_sg_len < 0)
 462                 return dd->out_sg_len;
 463
 464         rctx->mode &= FLAGS_MODE_MASK;
 465         dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode;
 466
 467         dd->ctx = ctx;
 468         rctx->dd = dd;
 469
 470         return omap_aes_write_ctrl(dd);
 471 }
 472
 473 static int omap_aes_crypt_req(struct crypto_engine *engine,
 474                               void *areq)
 475 {
 476         struct ablkcipher_request *req = container_of(areq, struct ablkcipher_request, base);
 477         struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req);
 478         struct omap_aes_dev *dd = rctx->dd;
 479
 480         if (!dd)
 481                 return -ENODEV;
 482
 483         return omap_aes_crypt_dma_start(dd);
 484 }
 485
 486 static void omap_aes_done_task(unsigned long data)
 487 {
 488         struct omap_aes_dev *dd = (struct omap_aes_dev *)data;
 489
 490         pr_debug("enter done_task\n");
 491
 492         if (!dd->pio_only) {
 493                 dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len,
 494                                        DMA_FROM_DEVICE);
 495                 dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
 496                 dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len,
 497                              DMA_FROM_DEVICE);
 498                 omap_aes_crypt_dma_stop(dd);
 499         }
 500
 501         omap_crypto_cleanup(dd->in_sgl, NULL, 0, dd->total_save,
 502                             FLAGS_IN_DATA_ST_SHIFT, dd->flags);
 503
 504         omap_crypto_cleanup(&dd->out_sgl, dd->orig_out, 0, dd->total_save,
 505                             FLAGS_OUT_DATA_ST_SHIFT, dd->flags);
 506
 507         omap_aes_finish_req(dd, 0);
 508
 509         pr_debug("exit\n");
 510 }
 511
 512 static int omap_aes_crypt(struct ablkcipher_request *req, unsigned long mode)
 513 {
 514         struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(
 515                         crypto_ablkcipher_reqtfm(req));
 516         struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req);
 517         struct omap_aes_dev *dd;
 518         int ret;
 519
 520         pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->nbytes,
 521                   !!(mode & FLAGS_ENCRYPT),
 522                   !!(mode & FLAGS_CBC));
 523
 524         if (req->nbytes < aes_fallback_sz) {
 525                 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
 526
 527                 skcipher_request_set_sync_tfm(subreq, ctx->fallback);
 528                 skcipher_request_set_callback(subreq, req->base.flags, NULL,
 529                                               NULL);
 530                 skcipher_request_set_crypt(subreq, req->src, req->dst,
 531                                            req->nbytes, req->info);
 532
 533                 if (mode & FLAGS_ENCRYPT)
 534                         ret = crypto_skcipher_encrypt(subreq);
 535                 else
 536                         ret = crypto_skcipher_decrypt(subreq);
 537
 538                 skcipher_request_zero(subreq);
 539                 return ret;
 540         }
 541         dd = omap_aes_find_dev(rctx);
 542         if (!dd)
 543                 return -ENODEV;
 544
 545         rctx->mode = mode;
 546
 547         return omap_aes_handle_queue(dd, req);
 548 }
 549
 550 /* ********************** ALG API ************************************ */
 551
 552 static int omap_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
 553                            unsigned int keylen)
 554 {
 555         struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 556         int ret;
 557
 558         if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 &&
 559                    keylen != AES_KEYSIZE_256)
 560                 return -EINVAL;
 561
 562         pr_debug("enter, keylen: %d\n", keylen);
 563
 564         memcpy(ctx->key, key, keylen);
 565         ctx->keylen = keylen;
 566
 567         crypto_sync_skcipher_clear_flags(ctx->fallback, CRYPTO_TFM_REQ_MASK);
 568         crypto_sync_skcipher_set_flags(ctx->fallback, tfm->base.crt_flags &
 569                                                  CRYPTO_TFM_REQ_MASK);
 570
 571         ret = crypto_sync_skcipher_setkey(ctx->fallback, key, keylen);
 572         if (!ret)
 573                 return 0;
 574
 575         return 0;
 576 }
 577
 578 static int omap_aes_ecb_encrypt(struct ablkcipher_request *req)
 579 {
 580         return omap_aes_crypt(req, FLAGS_ENCRYPT);
 581 }
 582
 583 static int omap_aes_ecb_decrypt(struct ablkcipher_request *req)
 584 {
 585         return omap_aes_crypt(req, 0);
 586 }
 587
 588 static int omap_aes_cbc_encrypt(struct ablkcipher_request *req)
 589 {
 590         return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC);
 591 }
 592
 593 static int omap_aes_cbc_decrypt(struct ablkcipher_request *req)
 594 {
 595         return omap_aes_crypt(req, FLAGS_CBC);
 596 }
 597
 598 static int omap_aes_ctr_encrypt(struct ablkcipher_request *req)
 599 {
 600         return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CTR);
 601 }
 602
 603 static int omap_aes_ctr_decrypt(struct ablkcipher_request *req)
 604 {
 605         return omap_aes_crypt(req, FLAGS_CTR);
 606 }
 607
 608 static int omap_aes_prepare_req(struct crypto_engine *engine,
 609                                 void *req);
 610 static int omap_aes_crypt_req(struct crypto_engine *engine,
 611                               void *req);
 612
 613 static int omap_aes_cra_init(struct crypto_tfm *tfm)
 614 {
 615         const char *name = crypto_tfm_alg_name(tfm);
 616         struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 617         struct crypto_sync_skcipher *blk;
 618
 619         blk = crypto_alloc_sync_skcipher(name, 0, CRYPTO_ALG_NEED_FALLBACK);
 620         if (IS_ERR(blk))
 621                 return PTR_ERR(blk);
 622
 623         ctx->fallback = blk;
 624
 625         tfm->crt_ablkcipher.reqsize = sizeof(struct omap_aes_reqctx);
 626
 627         ctx->enginectx.op.prepare_request = omap_aes_prepare_req;
 628         ctx->enginectx.op.unprepare_request = NULL;
 629         ctx->enginectx.op.do_one_request = omap_aes_crypt_req;
 630
 631         return 0;
 632 }
 633
 634 static int omap_aes_gcm_cra_init(struct crypto_aead *tfm)
 635 {
 636         struct omap_aes_dev *dd = NULL;
 637         struct omap_aes_ctx *ctx = crypto_aead_ctx(tfm);
 638         int err;
 639
 640         /* Find AES device, currently picks the first device */
 641         spin_lock_bh(&list_lock);
 642         list_for_each_entry(dd, &dev_list, list) {
 643                 break;
 644         }
 645         spin_unlock_bh(&list_lock);
 646
 647         err = pm_runtime_get_sync(dd->dev);
 648         if (err < 0) {
 649                 dev_err(dd->dev, "%s: failed to get_sync(%d)\n",
 650                         __func__, err);
 651                 return err;
 652         }
 653
 654         tfm->reqsize = sizeof(struct omap_aes_reqctx);
 655         ctx->ctr = crypto_alloc_skcipher("ecb(aes)", 0, 0);
 656         if (IS_ERR(ctx->ctr)) {
 657                 pr_warn("could not load aes driver for encrypting IV\n");
 658                 return PTR_ERR(ctx->ctr);
 659         }
 660
 661         return 0;
 662 }
 663
 664 static void omap_aes_cra_exit(struct crypto_tfm *tfm)
 665 {
 666         struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 667
 668         if (ctx->fallback)
 669                 crypto_free_sync_skcipher(ctx->fallback);
 670
 671         ctx->fallback = NULL;
 672 }
 673
 674 static void omap_aes_gcm_cra_exit(struct crypto_aead *tfm)
 675 {
 676         struct omap_aes_ctx *ctx = crypto_aead_ctx(tfm);
 677
 678         omap_aes_cra_exit(crypto_aead_tfm(tfm));
 679
 680         if (ctx->ctr)
 681                 crypto_free_skcipher(ctx->ctr);
 682 }
 683
 684 /* ********************** ALGS ************************************ */
 685
 686 static struct crypto_alg algs_ecb_cbc[] = {
 687 {
 688         .cra_name               = "ecb(aes)",
 689         .cra_driver_name        = "ecb-aes-omap",
 690         .cra_priority           = 300,
 691         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER |
 692                                   CRYPTO_ALG_KERN_DRIVER_ONLY |
 693                                   CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK,
 694         .cra_blocksize          = AES_BLOCK_SIZE,
 695         .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 696         .cra_alignmask          = 0,
 697         .cra_type               = &crypto_ablkcipher_type,
 698         .cra_module             = THIS_MODULE,
 699         .cra_init               = omap_aes_cra_init,
 700         .cra_exit               = omap_aes_cra_exit,
 701         .cra_u.ablkcipher = {
 702                 .min_keysize    = AES_MIN_KEY_SIZE,
 703                 .max_keysize    = AES_MAX_KEY_SIZE,
 704                 .setkey         = omap_aes_setkey,
 705                 .encrypt        = omap_aes_ecb_encrypt,
 706                 .decrypt        = omap_aes_ecb_decrypt,
 707         }
 708 },
 709 {
 710         .cra_name               = "cbc(aes)",
 711         .cra_driver_name        = "cbc-aes-omap",
 712         .cra_priority           = 300,
 713         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER |
 714                                   CRYPTO_ALG_KERN_DRIVER_ONLY |
 715                                   CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK,
 716         .cra_blocksize          = AES_BLOCK_SIZE,
 717         .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 718         .cra_alignmask          = 0,
 719         .cra_type               = &crypto_ablkcipher_type,
 720         .cra_module             = THIS_MODULE,
 721         .cra_init               = omap_aes_cra_init,
 722         .cra_exit               = omap_aes_cra_exit,
 723         .cra_u.ablkcipher = {
 724                 .min_keysize    = AES_MIN_KEY_SIZE,
 725                 .max_keysize    = AES_MAX_KEY_SIZE,
 726                 .ivsize         = AES_BLOCK_SIZE,
 727                 .setkey         = omap_aes_setkey,
 728                 .encrypt        = omap_aes_cbc_encrypt,
 729                 .decrypt        = omap_aes_cbc_decrypt,
 730         }
 731 }
 732 };
 733
 734 static struct crypto_alg algs_ctr[] = {
 735 {
 736         .cra_name               = "ctr(aes)",
 737         .cra_driver_name        = "ctr-aes-omap",
 738         .cra_priority           = 300,
 739         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER |
 740                                   CRYPTO_ALG_KERN_DRIVER_ONLY |
 741                                   CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK,
 742         .cra_blocksize          = AES_BLOCK_SIZE,
 743         .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 744         .cra_alignmask          = 0,
 745         .cra_type               = &crypto_ablkcipher_type,
 746         .cra_module             = THIS_MODULE,
 747         .cra_init               = omap_aes_cra_init,
 748         .cra_exit               = omap_aes_cra_exit,
 749         .cra_u.ablkcipher = {
 750                 .min_keysize    = AES_MIN_KEY_SIZE,
 751                 .max_keysize    = AES_MAX_KEY_SIZE,
 752                 .ivsize         = AES_BLOCK_SIZE,
 753                 .setkey         = omap_aes_setkey,
 754                 .encrypt        = omap_aes_ctr_encrypt,
 755                 .decrypt        = omap_aes_ctr_decrypt,
 756         }
 757 } ,
 758 };
 759
 760 static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc[] = {
 761         {
 762                 .algs_list      = algs_ecb_cbc,
 763                 .size           = ARRAY_SIZE(algs_ecb_cbc),
 764         },
 765 };
 766
 767 static struct aead_alg algs_aead_gcm[] = {
 768 {
 769         .base = {
 770                 .cra_name               = "gcm(aes)",
 771                 .cra_driver_name        = "gcm-aes-omap",
 772                 .cra_priority           = 300,
 773                 .cra_flags              = CRYPTO_ALG_ASYNC |
 774                                           CRYPTO_ALG_KERN_DRIVER_ONLY,
 775                 .cra_blocksize          = 1,
 776                 .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 777                 .cra_alignmask          = 0xf,
 778                 .cra_module             = THIS_MODULE,
 779         },
 780         .init           = omap_aes_gcm_cra_init,
 781         .exit           = omap_aes_gcm_cra_exit,
 782         .ivsize         = GCM_AES_IV_SIZE,
 783         .maxauthsize    = AES_BLOCK_SIZE,
 784         .setkey         = omap_aes_gcm_setkey,
 785         .encrypt        = omap_aes_gcm_encrypt,
 786         .decrypt        = omap_aes_gcm_decrypt,
 787 },
 788 {
 789         .base = {
 790                 .cra_name               = "rfc4106(gcm(aes))",
 791                 .cra_driver_name        = "rfc4106-gcm-aes-omap",
 792                 .cra_priority           = 300,
 793                 .cra_flags              = CRYPTO_ALG_ASYNC |
 794                                           CRYPTO_ALG_KERN_DRIVER_ONLY,
 795                 .cra_blocksize          = 1,
 796                 .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 797                 .cra_alignmask          = 0xf,
 798                 .cra_module             = THIS_MODULE,
 799         },
 800         .init           = omap_aes_gcm_cra_init,
 801         .exit           = omap_aes_gcm_cra_exit,
 802         .maxauthsize    = AES_BLOCK_SIZE,
 803         .ivsize         = GCM_RFC4106_IV_SIZE,
 804         .setkey         = omap_aes_4106gcm_setkey,
 805         .encrypt        = omap_aes_4106gcm_encrypt,
 806         .decrypt        = omap_aes_4106gcm_decrypt,
 807 },
 808 };
 809
 810 static struct omap_aes_aead_algs omap_aes_aead_info = {
 811         .algs_list      =       algs_aead_gcm,
 812         .size           =       ARRAY_SIZE(algs_aead_gcm),
 813 };
 814
 815 static const struct omap_aes_pdata omap_aes_pdata_omap2 = {
 816         .algs_info      = omap_aes_algs_info_ecb_cbc,
 817         .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc),
 818         .trigger        = omap_aes_dma_trigger_omap2,
 819         .key_ofs        = 0x1c,
 820         .iv_ofs         = 0x20,
 821         .ctrl_ofs       = 0x30,
 822         .data_ofs       = 0x34,
 823         .rev_ofs        = 0x44,
 824         .mask_ofs       = 0x48,
 825         .dma_enable_in  = BIT(2),
 826         .dma_enable_out = BIT(3),
 827         .dma_start      = BIT(5),
 828         .major_mask     = 0xf0,
 829         .major_shift    = 4,
 830         .minor_mask     = 0x0f,
 831         .minor_shift    = 0,
 832 };
 833
 834 #ifdef CONFIG_OF
 835 static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc_ctr[] = {
 836         {
 837                 .algs_list      = algs_ecb_cbc,
 838                 .size           = ARRAY_SIZE(algs_ecb_cbc),
 839         },
 840         {
 841                 .algs_list      = algs_ctr,
 842                 .size           = ARRAY_SIZE(algs_ctr),
 843         },
 844 };
 845
 846 static const struct omap_aes_pdata omap_aes_pdata_omap3 = {
 847         .algs_info      = omap_aes_algs_info_ecb_cbc_ctr,
 848         .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr),
 849         .trigger        = omap_aes_dma_trigger_omap2,
 850         .key_ofs        = 0x1c,
 851         .iv_ofs         = 0x20,
 852         .ctrl_ofs       = 0x30,
 853         .data_ofs       = 0x34,
 854         .rev_ofs        = 0x44,
 855         .mask_ofs       = 0x48,
 856         .dma_enable_in  = BIT(2),
 857         .dma_enable_out = BIT(3),
 858         .dma_start      = BIT(5),
 859         .major_mask     = 0xf0,
 860         .major_shift    = 4,
 861         .minor_mask     = 0x0f,
 862         .minor_shift    = 0,
 863 };
 864
 865 static const struct omap_aes_pdata omap_aes_pdata_omap4 = {
 866         .algs_info      = omap_aes_algs_info_ecb_cbc_ctr,
 867         .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr),
 868         .aead_algs_info = &omap_aes_aead_info,
 869         .trigger        = omap_aes_dma_trigger_omap4,
 870         .key_ofs        = 0x3c,
 871         .iv_ofs         = 0x40,
 872         .ctrl_ofs       = 0x50,
 873         .data_ofs       = 0x60,
 874         .rev_ofs        = 0x80,
 875         .mask_ofs       = 0x84,
 876         .irq_status_ofs = 0x8c,
 877         .irq_enable_ofs = 0x90,
 878         .dma_enable_in  = BIT(5),
 879         .dma_enable_out = BIT(6),
 880         .major_mask     = 0x0700,
 881         .major_shift    = 8,
 882         .minor_mask     = 0x003f,
 883         .minor_shift    = 0,
 884 };
 885
 886 static irqreturn_t omap_aes_irq(int irq, void *dev_id)
 887 {
 888         struct omap_aes_dev *dd = dev_id;
 889         u32 status, i;
 890         u32 *src, *dst;
 891
 892         status = omap_aes_read(dd, AES_REG_IRQ_STATUS(dd));
 893         if (status & AES_REG_IRQ_DATA_IN) {
 894                 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0);
 895
 896                 BUG_ON(!dd->in_sg);
 897
 898                 BUG_ON(_calc_walked(in) > dd->in_sg->length);
 899
 900                 src = sg_virt(dd->in_sg) + _calc_walked(in);
 901
 902                 for (i = 0; i < AES_BLOCK_WORDS; i++) {
 903                         omap_aes_write(dd, AES_REG_DATA_N(dd, i), *src);
 904
 905                         scatterwalk_advance(&dd->in_walk, 4);
 906                         if (dd->in_sg->length == _calc_walked(in)) {
 907                                 dd->in_sg = sg_next(dd->in_sg);
 908                                 if (dd->in_sg) {
 909                                         scatterwalk_start(&dd->in_walk,
 910                                                           dd->in_sg);
 911                                         src = sg_virt(dd->in_sg) +
 912                                               _calc_walked(in);
 913                                 }
 914                         } else {
 915                                 src++;
 916                         }
 917                 }
 918
 919                 /* Clear IRQ status */
 920                 status &= ~AES_REG_IRQ_DATA_IN;
 921                 omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status);
 922
 923                 /* Enable DATA_OUT interrupt */
 924                 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x4);
 925
 926         } else if (status & AES_REG_IRQ_DATA_OUT) {
 927                 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0);
 928
 929                 BUG_ON(!dd->out_sg);
 930
 931                 BUG_ON(_calc_walked(out) > dd->out_sg->length);
 932
 933                 dst = sg_virt(dd->out_sg) + _calc_walked(out);
 934
 935                 for (i = 0; i < AES_BLOCK_WORDS; i++) {
 936                         *dst = omap_aes_read(dd, AES_REG_DATA_N(dd, i));
 937                         scatterwalk_advance(&dd->out_walk, 4);
 938                         if (dd->out_sg->length == _calc_walked(out)) {
 939                                 dd->out_sg = sg_next(dd->out_sg);
 940                                 if (dd->out_sg) {
 941                                         scatterwalk_start(&dd->out_walk,
 942                                                           dd->out_sg);
 943                                         dst = sg_virt(dd->out_sg) +
 944                                               _calc_walked(out);
 945                                 }
 946                         } else {
 947                                 dst++;
 948                         }
 949                 }
 950
 951                 dd->total -= min_t(size_t, AES_BLOCK_SIZE, dd->total);
 952
 953                 /* Clear IRQ status */
 954                 status &= ~AES_REG_IRQ_DATA_OUT;
 955                 omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status);
 956
 957                 if (!dd->total)
 958                         /* All bytes read! */
 959                         tasklet_schedule(&dd->done_task);
 960                 else
 961                         /* Enable DATA_IN interrupt for next block */
 962                         omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2);
 963         }
 964
 965         return IRQ_HANDLED;
 966 }
 967
 968 static const struct of_device_id omap_aes_of_match[] = {
 969         {
 970                 .compatible     = "ti,omap2-aes",
 971                 .data           = &omap_aes_pdata_omap2,
 972         },
 973         {
 974                 .compatible     = "ti,omap3-aes",
 975                 .data           = &omap_aes_pdata_omap3,
 976         },
 977         {
 978                 .compatible     = "ti,omap4-aes",
 979                 .data           = &omap_aes_pdata_omap4,
 980         },
 981         {},
 982 };
 983 MODULE_DEVICE_TABLE(of, omap_aes_of_match);
 984
 985 static int omap_aes_get_res_of(struct omap_aes_dev *dd,
 986                 struct device *dev, struct resource *res)
 987 {
 988         struct device_node *node = dev->of_node;
 989         int err = 0;
 990
 991         dd->pdata = of_device_get_match_data(dev);
 992         if (!dd->pdata) {
 993                 dev_err(dev, "no compatible OF match\n");
 994                 err = -EINVAL;
 995                 goto err;
 996         }
 997
 998         err = of_address_to_resource(node, 0, res);
 999         if (err < 0) {
1000                 dev_err(dev, "can't translate OF node address\n");
1001                 err = -EINVAL;
1002                 goto err;
1003         }
1004
1005 err:
1006         return err;
1007 }
1008 #else
1009 static const struct of_device_id omap_aes_of_match[] = {
1010         {},
1011 };
1012
1013 static int omap_aes_get_res_of(struct omap_aes_dev *dd,
1014                 struct device *dev, struct resource *res)
1015 {
1016         return -EINVAL;
1017 }
1018 #endif
1019
1020 static int omap_aes_get_res_pdev(struct omap_aes_dev *dd,
1021                 struct platform_device *pdev, struct resource *res)
1022 {
1023         struct device *dev = &pdev->dev;
1024         struct resource *r;
1025         int err = 0;
1026
1027         /* Get the base address */
1028         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1029         if (!r) {
1030                 dev_err(dev, "no MEM resource info\n");
1031                 err = -ENODEV;
1032                 goto err;
1033         }
1034         memcpy(res, r, sizeof(*res));
1035
1036         /* Only OMAP2/3 can be non-DT */
1037         dd->pdata = &omap_aes_pdata_omap2;
1038
1039 err:
1040         return err;
1041 }
1042
1043 static ssize_t fallback_show(struct device *dev, struct device_attribute *attr,
1044                              char *buf)
1045 {
1046         return sprintf(buf, "%d\n", aes_fallback_sz);
1047 }
1048
1049 static ssize_t fallback_store(struct device *dev, struct device_attribute *attr,
1050                               const char *buf, size_t size)
1051 {
1052         ssize_t status;
1053         long value;
1054
1055         status = kstrtol(buf, 0, &value);
1056         if (status)
1057                 return status;
1058
1059         /* HW accelerator only works with buffers > 9 */
1060         if (value < 9) {
1061                 dev_err(dev, "minimum fallback size 9\n");
1062                 return -EINVAL;
1063         }
1064
1065         aes_fallback_sz = value;
1066
1067         return size;
1068 }
1069
1070 static ssize_t queue_len_show(struct device *dev, struct device_attribute *attr,
1071                               char *buf)
1072 {
1073         struct omap_aes_dev *dd = dev_get_drvdata(dev);
1074
1075         return sprintf(buf, "%d\n", dd->engine->queue.max_qlen);
1076 }
1077
1078 static ssize_t queue_len_store(struct device *dev,
1079                                struct device_attribute *attr, const char *buf,
1080                                size_t size)
1081 {
1082         struct omap_aes_dev *dd;
1083         ssize_t status;
1084         long value;
1085         unsigned long flags;
1086
1087         status = kstrtol(buf, 0, &value);
1088         if (status)
1089                 return status;
1090
1091         if (value < 1)
1092                 return -EINVAL;
1093
1094         /*
1095          * Changing the queue size in fly is safe, if size becomes smaller
1096          * than current size, it will just not accept new entries until
1097          * it has shrank enough.
1098          */
1099         spin_lock_bh(&list_lock);
1100         list_for_each_entry(dd, &dev_list, list) {
1101                 spin_lock_irqsave(&dd->lock, flags);
1102                 dd->engine->queue.max_qlen = value;
1103                 dd->aead_queue.base.max_qlen = value;
1104                 spin_unlock_irqrestore(&dd->lock, flags);
1105         }
1106         spin_unlock_bh(&list_lock);
1107
1108         return size;
1109 }
1110
1111 static DEVICE_ATTR_RW(queue_len);
1112 static DEVICE_ATTR_RW(fallback);
1113
1114 static struct attribute *omap_aes_attrs[] = {
1115         &dev_attr_queue_len.attr,
1116         &dev_attr_fallback.attr,
1117         NULL,
1118 };
1119
1120 static struct attribute_group omap_aes_attr_group = {
1121         .attrs = omap_aes_attrs,
1122 };
1123
1124 static int omap_aes_probe(struct platform_device *pdev)
1125 {
1126         struct device *dev = &pdev->dev;
1127         struct omap_aes_dev *dd;
1128         struct crypto_alg *algp;
1129         struct aead_alg *aalg;
1130         struct resource res;
1131         int err = -ENOMEM, i, j, irq = -1;
1132         u32 reg;
1133
1134         dd = devm_kzalloc(dev, sizeof(struct omap_aes_dev), GFP_KERNEL);
1135         if (dd == NULL) {
1136                 dev_err(dev, "unable to alloc data struct.\n");
1137                 goto err_data;
1138         }
1139         dd->dev = dev;
1140         platform_set_drvdata(pdev, dd);
1141
1142         aead_init_queue(&dd->aead_queue, OMAP_AES_QUEUE_LENGTH);
1143
1144         err = (dev->of_node) ? omap_aes_get_res_of(dd, dev, &res) :
1145                                omap_aes_get_res_pdev(dd, pdev, &res);
1146         if (err)
1147                 goto err_res;
1148
1149         dd->io_base = devm_ioremap_resource(dev, &res);
1150         if (IS_ERR(dd->io_base)) {
1151                 err = PTR_ERR(dd->io_base);
1152                 goto err_res;
1153         }
1154         dd->phys_base = res.start;
1155
1156         pm_runtime_use_autosuspend(dev);
1157         pm_runtime_set_autosuspend_delay(dev, DEFAULT_AUTOSUSPEND_DELAY);
1158
1159         pm_runtime_enable(dev);
1160         err = pm_runtime_get_sync(dev);
1161         if (err < 0) {
1162                 dev_err(dev, "%s: failed to get_sync(%d)\n",
1163                         __func__, err);
1164                 goto err_res;
1165         }
1166
1167         omap_aes_dma_stop(dd);
1168
1169         reg = omap_aes_read(dd, AES_REG_REV(dd));
1170
1171         pm_runtime_put_sync(dev);
1172
1173         dev_info(dev, "OMAP AES hw accel rev: %u.%u\n",
1174                  (reg & dd->pdata->major_mask) >> dd->pdata->major_shift,
1175                  (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
1176
1177         tasklet_init(&dd->done_task, omap_aes_done_task, (unsigned long)dd);
1178
1179         err = omap_aes_dma_init(dd);
1180         if (err == -EPROBE_DEFER) {
1181                 goto err_irq;
1182         } else if (err && AES_REG_IRQ_STATUS(dd) && AES_REG_IRQ_ENABLE(dd)) {
1183                 dd->pio_only = 1;
1184
1185                 irq = platform_get_irq(pdev, 0);
1186                 if (irq < 0) {
1187                         dev_err(dev, "can't get IRQ resource\n");
1188                         err = irq;
1189                         goto err_irq;
1190                 }
1191
1192                 err = devm_request_irq(dev, irq, omap_aes_irq, 0,
1193                                 dev_name(dev), dd);
1194                 if (err) {
1195                         dev_err(dev, "Unable to grab omap-aes IRQ\n");
1196                         goto err_irq;
1197                 }
1198         }
1199
1200         spin_lock_init(&dd->lock);
1201
1202         INIT_LIST_HEAD(&dd->list);
1203         spin_lock(&list_lock);
1204         list_add_tail(&dd->list, &dev_list);
1205         spin_unlock(&list_lock);
1206
1207         /* Initialize crypto engine */
1208         dd->engine = crypto_engine_alloc_init(dev, 1);
1209         if (!dd->engine) {
1210                 err = -ENOMEM;
1211                 goto err_engine;
1212         }
1213
1214         err = crypto_engine_start(dd->engine);
1215         if (err)
1216                 goto err_engine;
1217
1218         for (i = 0; i < dd->pdata->algs_info_size; i++) {
1219                 if (!dd->pdata->algs_info[i].registered) {
1220                         for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
1221                                 algp = &dd->pdata->algs_info[i].algs_list[j];
1222
1223                                 pr_debug("reg alg: %s\n", algp->cra_name);
1224
1225                                 err = crypto_register_alg(algp);
1226                                 if (err)
1227                                         goto err_algs;
1228
1229                                 dd->pdata->algs_info[i].registered++;
1230                         }
1231                 }
1232         }
1233
1234         if (dd->pdata->aead_algs_info &&
1235             !dd->pdata->aead_algs_info->registered) {
1236                 for (i = 0; i < dd->pdata->aead_algs_info->size; i++) {
1237                         aalg = &dd->pdata->aead_algs_info->algs_list[i];
1238                         algp = &aalg->base;
1239
1240                         pr_debug("reg alg: %s\n", algp->cra_name);
1241
1242                         err = crypto_register_aead(aalg);
1243                         if (err)
1244                                 goto err_aead_algs;
1245
1246                         dd->pdata->aead_algs_info->registered++;
1247                 }
1248         }
1249
1250         err = sysfs_create_group(&dev->kobj, &omap_aes_attr_group);
1251         if (err) {
1252                 dev_err(dev, "could not create sysfs device attrs\n");
1253                 goto err_aead_algs;
1254         }
1255
1256         return 0;
1257 err_aead_algs:
1258         for (i = dd->pdata->aead_algs_info->registered - 1; i >= 0; i--) {
1259                 aalg = &dd->pdata->aead_algs_info->algs_list[i];
1260                 crypto_unregister_aead(aalg);
1261         }
1262 err_algs:
1263         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1264                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1265                         crypto_unregister_alg(
1266                                         &dd->pdata->algs_info[i].algs_list[j]);
1267
1268 err_engine:
1269         if (dd->engine)
1270                 crypto_engine_exit(dd->engine);
1271
1272         omap_aes_dma_cleanup(dd);
1273 err_irq:
1274         tasklet_kill(&dd->done_task);
1275         pm_runtime_disable(dev);
1276 err_res:
1277         dd = NULL;
1278 err_data:
1279         dev_err(dev, "initialization failed.\n");
1280         return err;
1281 }
1282
1283 static int omap_aes_remove(struct platform_device *pdev)
1284 {
1285         struct omap_aes_dev *dd = platform_get_drvdata(pdev);
1286         struct aead_alg *aalg;
1287         int i, j;
1288
1289         if (!dd)
1290                 return -ENODEV;
1291
1292         spin_lock(&list_lock);
1293         list_del(&dd->list);
1294         spin_unlock(&list_lock);
1295
1296         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1297                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1298                         crypto_unregister_alg(
1299                                         &dd->pdata->algs_info[i].algs_list[j]);
1300
1301         for (i = dd->pdata->aead_algs_info->size - 1; i >= 0; i--) {
1302                 aalg = &dd->pdata->aead_algs_info->algs_list[i];
1303                 crypto_unregister_aead(aalg);
1304         }
1305
1306         crypto_engine_exit(dd->engine);
1307
1308         tasklet_kill(&dd->done_task);
1309         omap_aes_dma_cleanup(dd);
1310         pm_runtime_disable(dd->dev);
1311         dd = NULL;
1312
1313         return 0;
1314 }
1315
1316 #ifdef CONFIG_PM_SLEEP
1317 static int omap_aes_suspend(struct device *dev)
1318 {
1319         pm_runtime_put_sync(dev);
1320         return 0;
1321 }
1322
1323 static int omap_aes_resume(struct device *dev)
1324 {
1325         pm_runtime_get_sync(dev);
1326         return 0;
1327 }
1328 #endif
1329
1330 static SIMPLE_DEV_PM_OPS(omap_aes_pm_ops, omap_aes_suspend, omap_aes_resume);
1331
1332 static struct platform_driver omap_aes_driver = {
1333         .probe  = omap_aes_probe,
1334         .remove = omap_aes_remove,
1335         .driver = {
1336                 .name   = "omap-aes",
1337                 .pm     = &omap_aes_pm_ops,
1338                 .of_match_table = omap_aes_of_match,
1339         },
1340 };
1341
1342 module_platform_driver(omap_aes_driver);
1343
1344 MODULE_DESCRIPTION("OMAP AES hw acceleration support.");
1345 MODULE_LICENSE("GPL v2");
1346 MODULE_AUTHOR("Dmitry Kasatkin");
1347