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/omap-dma.h>
  30 #include <linux/pm_runtime.h>
  31 #include <linux/of.h>
  32 #include <linux/of_device.h>
  33 #include <linux/of_address.h>
  34 #include <linux/io.h>
  35 #include <linux/crypto.h>
  36 #include <linux/interrupt.h>
  37 #include <crypto/scatterwalk.h>
  38 #include <crypto/aes.h>
  39
  40 #define DST_MAXBURST                    4
  41 #define DMA_MIN                         (DST_MAXBURST * sizeof(u32))
  42
  43 #define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset)
  44
  45 /* OMAP TRM gives bitfields as start:end, where start is the higher bit
  46    number. For example 7:0 */
  47 #define FLD_MASK(start, end)    (((1 << ((start) - (end) + 1)) - 1) << (end))
  48 #define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
  49
  50 #define AES_REG_KEY(dd, x)              ((dd)->pdata->key_ofs - \
  51                                                 ((x ^ 0x01) * 0x04))
  52 #define AES_REG_IV(dd, x)               ((dd)->pdata->iv_ofs + ((x) * 0x04))
  53
  54 #define AES_REG_CTRL(dd)                ((dd)->pdata->ctrl_ofs)
  55 #define AES_REG_CTRL_CTR_WIDTH_MASK     (3 << 7)
  56 #define AES_REG_CTRL_CTR_WIDTH_32               (0 << 7)
  57 #define AES_REG_CTRL_CTR_WIDTH_64               (1 << 7)
  58 #define AES_REG_CTRL_CTR_WIDTH_96               (2 << 7)
  59 #define AES_REG_CTRL_CTR_WIDTH_128              (3 << 7)
  60 #define AES_REG_CTRL_CTR                (1 << 6)
  61 #define AES_REG_CTRL_CBC                (1 << 5)
  62 #define AES_REG_CTRL_KEY_SIZE           (3 << 3)
  63 #define AES_REG_CTRL_DIRECTION          (1 << 2)
  64 #define AES_REG_CTRL_INPUT_READY        (1 << 1)
  65 #define AES_REG_CTRL_OUTPUT_READY       (1 << 0)
  66
  67 #define AES_REG_DATA_N(dd, x)           ((dd)->pdata->data_ofs + ((x) * 0x04))
  68
  69 #define AES_REG_REV(dd)                 ((dd)->pdata->rev_ofs)
  70
  71 #define AES_REG_MASK(dd)                ((dd)->pdata->mask_ofs)
  72 #define AES_REG_MASK_SIDLE              (1 << 6)
  73 #define AES_REG_MASK_START              (1 << 5)
  74 #define AES_REG_MASK_DMA_OUT_EN         (1 << 3)
  75 #define AES_REG_MASK_DMA_IN_EN          (1 << 2)
  76 #define AES_REG_MASK_SOFTRESET          (1 << 1)
  77 #define AES_REG_AUTOIDLE                (1 << 0)
  78
  79 #define AES_REG_LENGTH_N(x)             (0x54 + ((x) * 0x04))
  80
  81 #define AES_REG_IRQ_STATUS(dd)         ((dd)->pdata->irq_status_ofs)
  82 #define AES_REG_IRQ_ENABLE(dd)         ((dd)->pdata->irq_enable_ofs)
  83 #define AES_REG_IRQ_DATA_IN            BIT(1)
  84 #define AES_REG_IRQ_DATA_OUT           BIT(2)
  85 #define DEFAULT_TIMEOUT         (5*HZ)
  86
  87 #define FLAGS_MODE_MASK         0x000f
  88 #define FLAGS_ENCRYPT           BIT(0)
  89 #define FLAGS_CBC               BIT(1)
  90 #define FLAGS_GIV               BIT(2)
  91 #define FLAGS_CTR               BIT(3)
  92
  93 #define FLAGS_INIT              BIT(4)
  94 #define FLAGS_FAST              BIT(5)
  95 #define FLAGS_BUSY              BIT(6)
  96
  97 #define AES_BLOCK_WORDS         (AES_BLOCK_SIZE >> 2)
  98
  99 struct omap_aes_ctx {
 100         struct omap_aes_dev *dd;
 101
 102         int             keylen;
 103         u32             key[AES_KEYSIZE_256 / sizeof(u32)];
 104         unsigned long   flags;
 105 };
 106
 107 struct omap_aes_reqctx {
 108         unsigned long mode;
 109 };
 110
 111 #define OMAP_AES_QUEUE_LENGTH   1
 112 #define OMAP_AES_CACHE_SIZE     0
 113
 114 struct omap_aes_algs_info {
 115         struct crypto_alg       *algs_list;
 116         unsigned int            size;
 117         unsigned int            registered;
 118 };
 119
 120 struct omap_aes_pdata {
 121         struct omap_aes_algs_info       *algs_info;
 122         unsigned int    algs_info_size;
 123
 124         void            (*trigger)(struct omap_aes_dev *dd, int length);
 125
 126         u32             key_ofs;
 127         u32             iv_ofs;
 128         u32             ctrl_ofs;
 129         u32             data_ofs;
 130         u32             rev_ofs;
 131         u32             mask_ofs;
 132         u32             irq_enable_ofs;
 133         u32             irq_status_ofs;
 134
 135         u32             dma_enable_in;
 136         u32             dma_enable_out;
 137         u32             dma_start;
 138
 139         u32             major_mask;
 140         u32             major_shift;
 141         u32             minor_mask;
 142         u32             minor_shift;
 143 };
 144
 145 struct omap_aes_dev {
 146         struct list_head        list;
 147         unsigned long           phys_base;
 148         void __iomem            *io_base;
 149         struct omap_aes_ctx     *ctx;
 150         struct device           *dev;
 151         unsigned long           flags;
 152         int                     err;
 153
 154         spinlock_t              lock;
 155         struct crypto_queue     queue;
 156
 157         struct tasklet_struct   done_task;
 158         struct tasklet_struct   queue_task;
 159
 160         struct ablkcipher_request       *req;
 161
 162         /*
 163          * total is used by PIO mode for book keeping so introduce
 164          * variable total_save as need it to calc page_order
 165          */
 166         size_t                          total;
 167         size_t                          total_save;
 168
 169         struct scatterlist              *in_sg;
 170         struct scatterlist              *out_sg;
 171
 172         /* Buffers for copying for unaligned cases */
 173         struct scatterlist              in_sgl;
 174         struct scatterlist              out_sgl;
 175         struct scatterlist              *orig_out;
 176         int                             sgs_copied;
 177
 178         struct scatter_walk             in_walk;
 179         struct scatter_walk             out_walk;
 180         int                     dma_in;
 181         struct dma_chan         *dma_lch_in;
 182         int                     dma_out;
 183         struct dma_chan         *dma_lch_out;
 184         int                     in_sg_len;
 185         int                     out_sg_len;
 186         int                     pio_only;
 187         const struct omap_aes_pdata     *pdata;
 188 };
 189
 190 /* keep registered devices data here */
 191 static LIST_HEAD(dev_list);
 192 static DEFINE_SPINLOCK(list_lock);
 193
 194 #ifdef DEBUG
 195 #define omap_aes_read(dd, offset)                               \
 196 ({                                                              \
 197         int _read_ret;                                          \
 198         _read_ret = __raw_readl(dd->io_base + offset);          \
 199         pr_debug("omap_aes_read(" #offset "=%#x)= %#x\n",       \
 200                  offset, _read_ret);                            \
 201         _read_ret;                                              \
 202 })
 203 #else
 204 static inline u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset)
 205 {
 206         return __raw_readl(dd->io_base + offset);
 207 }
 208 #endif
 209
 210 #ifdef DEBUG
 211 #define omap_aes_write(dd, offset, value)                               \
 212         do {                                                            \
 213                 pr_debug("omap_aes_write(" #offset "=%#x) value=%#x\n", \
 214                          offset, value);                                \
 215                 __raw_writel(value, dd->io_base + offset);              \
 216         } while (0)
 217 #else
 218 static inline void omap_aes_write(struct omap_aes_dev *dd, u32 offset,
 219                                   u32 value)
 220 {
 221         __raw_writel(value, dd->io_base + offset);
 222 }
 223 #endif
 224
 225 static inline void omap_aes_write_mask(struct omap_aes_dev *dd, u32 offset,
 226                                         u32 value, u32 mask)
 227 {
 228         u32 val;
 229
 230         val = omap_aes_read(dd, offset);
 231         val &= ~mask;
 232         val |= value;
 233         omap_aes_write(dd, offset, val);
 234 }
 235
 236 static void omap_aes_write_n(struct omap_aes_dev *dd, u32 offset,
 237                                         u32 *value, int count)
 238 {
 239         for (; count--; value++, offset += 4)
 240                 omap_aes_write(dd, offset, *value);
 241 }
 242
 243 static int omap_aes_hw_init(struct omap_aes_dev *dd)
 244 {
 245         if (!(dd->flags & FLAGS_INIT)) {
 246                 dd->flags |= FLAGS_INIT;
 247                 dd->err = 0;
 248         }
 249
 250         return 0;
 251 }
 252
 253 static int omap_aes_write_ctrl(struct omap_aes_dev *dd)
 254 {
 255         unsigned int key32;
 256         int i, err;
 257         u32 val, mask = 0;
 258
 259         err = omap_aes_hw_init(dd);
 260         if (err)
 261                 return err;
 262
 263         key32 = dd->ctx->keylen / sizeof(u32);
 264
 265         /* it seems a key should always be set even if it has not changed */
 266         for (i = 0; i < key32; i++) {
 267                 omap_aes_write(dd, AES_REG_KEY(dd, i),
 268                         __le32_to_cpu(dd->ctx->key[i]));
 269         }
 270
 271         if ((dd->flags & (FLAGS_CBC | FLAGS_CTR)) && dd->req->info)
 272                 omap_aes_write_n(dd, AES_REG_IV(dd, 0), dd->req->info, 4);
 273
 274         val = FLD_VAL(((dd->ctx->keylen >> 3) - 1), 4, 3);
 275         if (dd->flags & FLAGS_CBC)
 276                 val |= AES_REG_CTRL_CBC;
 277         if (dd->flags & FLAGS_CTR) {
 278                 val |= AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_32;
 279                 mask = AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_MASK;
 280         }
 281         if (dd->flags & FLAGS_ENCRYPT)
 282                 val |= AES_REG_CTRL_DIRECTION;
 283
 284         mask |= AES_REG_CTRL_CBC | AES_REG_CTRL_DIRECTION |
 285                         AES_REG_CTRL_KEY_SIZE;
 286
 287         omap_aes_write_mask(dd, AES_REG_CTRL(dd), val, mask);
 288
 289         return 0;
 290 }
 291
 292 static void omap_aes_dma_trigger_omap2(struct omap_aes_dev *dd, int length)
 293 {
 294         u32 mask, val;
 295
 296         val = dd->pdata->dma_start;
 297
 298         if (dd->dma_lch_out != NULL)
 299                 val |= dd->pdata->dma_enable_out;
 300         if (dd->dma_lch_in != NULL)
 301                 val |= dd->pdata->dma_enable_in;
 302
 303         mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
 304                dd->pdata->dma_start;
 305
 306         omap_aes_write_mask(dd, AES_REG_MASK(dd), val, mask);
 307
 308 }
 309
 310 static void omap_aes_dma_trigger_omap4(struct omap_aes_dev *dd, int length)
 311 {
 312         omap_aes_write(dd, AES_REG_LENGTH_N(0), length);
 313         omap_aes_write(dd, AES_REG_LENGTH_N(1), 0);
 314
 315         omap_aes_dma_trigger_omap2(dd, length);
 316 }
 317
 318 static void omap_aes_dma_stop(struct omap_aes_dev *dd)
 319 {
 320         u32 mask;
 321
 322         mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
 323                dd->pdata->dma_start;
 324
 325         omap_aes_write_mask(dd, AES_REG_MASK(dd), 0, mask);
 326 }
 327
 328 static struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_ctx *ctx)
 329 {
 330         struct omap_aes_dev *dd = NULL, *tmp;
 331
 332         spin_lock_bh(&list_lock);
 333         if (!ctx->dd) {
 334                 list_for_each_entry(tmp, &dev_list, list) {
 335                         /* FIXME: take fist available aes core */
 336                         dd = tmp;
 337                         break;
 338                 }
 339                 ctx->dd = dd;
 340         } else {
 341                 /* already found before */
 342                 dd = ctx->dd;
 343         }
 344         spin_unlock_bh(&list_lock);
 345
 346         return dd;
 347 }
 348
 349 static void omap_aes_dma_out_callback(void *data)
 350 {
 351         struct omap_aes_dev *dd = data;
 352
 353         /* dma_lch_out - completed */
 354         tasklet_schedule(&dd->done_task);
 355 }
 356
 357 static int omap_aes_dma_init(struct omap_aes_dev *dd)
 358 {
 359         int err = -ENOMEM;
 360         dma_cap_mask_t mask;
 361
 362         dd->dma_lch_out = NULL;
 363         dd->dma_lch_in = NULL;
 364
 365         dma_cap_zero(mask);
 366         dma_cap_set(DMA_SLAVE, mask);
 367
 368         dd->dma_lch_in = dma_request_slave_channel_compat(mask,
 369                                                           omap_dma_filter_fn,
 370                                                           &dd->dma_in,
 371                                                           dd->dev, "rx");
 372         if (!dd->dma_lch_in) {
 373                 dev_err(dd->dev, "Unable to request in DMA channel\n");
 374                 goto err_dma_in;
 375         }
 376
 377         dd->dma_lch_out = dma_request_slave_channel_compat(mask,
 378                                                            omap_dma_filter_fn,
 379                                                            &dd->dma_out,
 380                                                            dd->dev, "tx");
 381         if (!dd->dma_lch_out) {
 382                 dev_err(dd->dev, "Unable to request out DMA channel\n");
 383                 goto err_dma_out;
 384         }
 385
 386         return 0;
 387
 388 err_dma_out:
 389         dma_release_channel(dd->dma_lch_in);
 390 err_dma_in:
 391         if (err)
 392                 pr_err("error: %d\n", err);
 393         return err;
 394 }
 395
 396 static void omap_aes_dma_cleanup(struct omap_aes_dev *dd)
 397 {
 398         dma_release_channel(dd->dma_lch_out);
 399         dma_release_channel(dd->dma_lch_in);
 400 }
 401
 402 static void sg_copy_buf(void *buf, struct scatterlist *sg,
 403                               unsigned int start, unsigned int nbytes, int out)
 404 {
 405         struct scatter_walk walk;
 406
 407         if (!nbytes)
 408                 return;
 409
 410         scatterwalk_start(&walk, sg);
 411         scatterwalk_advance(&walk, start);
 412         scatterwalk_copychunks(buf, &walk, nbytes, out);
 413         scatterwalk_done(&walk, out, 0);
 414 }
 415
 416 static int omap_aes_crypt_dma(struct crypto_tfm *tfm,
 417                 struct scatterlist *in_sg, struct scatterlist *out_sg,
 418                 int in_sg_len, int out_sg_len)
 419 {
 420         struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 421         struct omap_aes_dev *dd = ctx->dd;
 422         struct dma_async_tx_descriptor *tx_in, *tx_out;
 423         struct dma_slave_config cfg;
 424         int ret;
 425
 426         if (dd->pio_only) {
 427                 scatterwalk_start(&dd->in_walk, dd->in_sg);
 428                 scatterwalk_start(&dd->out_walk, dd->out_sg);
 429
 430                 /* Enable DATAIN interrupt and let it take
 431                    care of the rest */
 432                 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2);
 433                 return 0;
 434         }
 435
 436         dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE);
 437
 438         memset(&cfg, 0, sizeof(cfg));
 439
 440         cfg.src_addr = dd->phys_base + AES_REG_DATA_N(dd, 0);
 441         cfg.dst_addr = dd->phys_base + AES_REG_DATA_N(dd, 0);
 442         cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 443         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 444         cfg.src_maxburst = DST_MAXBURST;
 445         cfg.dst_maxburst = DST_MAXBURST;
 446
 447         /* IN */
 448         ret = dmaengine_slave_config(dd->dma_lch_in, &cfg);
 449         if (ret) {
 450                 dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n",
 451                         ret);
 452                 return ret;
 453         }
 454
 455         tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, in_sg_len,
 456                                         DMA_MEM_TO_DEV,
 457                                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 458         if (!tx_in) {
 459                 dev_err(dd->dev, "IN prep_slave_sg() failed\n");
 460                 return -EINVAL;
 461         }
 462
 463         /* No callback necessary */
 464         tx_in->callback_param = dd;
 465
 466         /* OUT */
 467         ret = dmaengine_slave_config(dd->dma_lch_out, &cfg);
 468         if (ret) {
 469                 dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n",
 470                         ret);
 471                 return ret;
 472         }
 473
 474         tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, out_sg_len,
 475                                         DMA_DEV_TO_MEM,
 476                                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 477         if (!tx_out) {
 478                 dev_err(dd->dev, "OUT prep_slave_sg() failed\n");
 479                 return -EINVAL;
 480         }
 481
 482         tx_out->callback = omap_aes_dma_out_callback;
 483         tx_out->callback_param = dd;
 484
 485         dmaengine_submit(tx_in);
 486         dmaengine_submit(tx_out);
 487
 488         dma_async_issue_pending(dd->dma_lch_in);
 489         dma_async_issue_pending(dd->dma_lch_out);
 490
 491         /* start DMA */
 492         dd->pdata->trigger(dd, dd->total);
 493
 494         return 0;
 495 }
 496
 497 static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd)
 498 {
 499         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(
 500                                         crypto_ablkcipher_reqtfm(dd->req));
 501         int err;
 502
 503         pr_debug("total: %d\n", dd->total);
 504
 505         if (!dd->pio_only) {
 506                 err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len,
 507                                  DMA_TO_DEVICE);
 508                 if (!err) {
 509                         dev_err(dd->dev, "dma_map_sg() error\n");
 510                         return -EINVAL;
 511                 }
 512
 513                 err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len,
 514                                  DMA_FROM_DEVICE);
 515                 if (!err) {
 516                         dev_err(dd->dev, "dma_map_sg() error\n");
 517                         return -EINVAL;
 518                 }
 519         }
 520
 521         err = omap_aes_crypt_dma(tfm, dd->in_sg, dd->out_sg, dd->in_sg_len,
 522                                  dd->out_sg_len);
 523         if (err && !dd->pio_only) {
 524                 dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
 525                 dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len,
 526                              DMA_FROM_DEVICE);
 527         }
 528
 529         return err;
 530 }
 531
 532 static void omap_aes_finish_req(struct omap_aes_dev *dd, int err)
 533 {
 534         struct ablkcipher_request *req = dd->req;
 535
 536         pr_debug("err: %d\n", err);
 537
 538         dd->flags &= ~FLAGS_BUSY;
 539
 540         req->base.complete(&req->base, err);
 541 }
 542
 543 static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd)
 544 {
 545         int err = 0;
 546
 547         pr_debug("total: %d\n", dd->total);
 548
 549         omap_aes_dma_stop(dd);
 550
 551         dmaengine_terminate_all(dd->dma_lch_in);
 552         dmaengine_terminate_all(dd->dma_lch_out);
 553
 554         return err;
 555 }
 556
 557 int omap_aes_check_aligned(struct scatterlist *sg)
 558 {
 559         while (sg) {
 560                 if (!IS_ALIGNED(sg->offset, 4))
 561                         return -1;
 562                 if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE))
 563                         return -1;
 564                 sg = sg_next(sg);
 565         }
 566         return 0;
 567 }
 568
 569 int omap_aes_copy_sgs(struct omap_aes_dev *dd)
 570 {
 571         void *buf_in, *buf_out;
 572         int pages;
 573
 574         pages = get_order(dd->total);
 575
 576         buf_in = (void *)__get_free_pages(GFP_ATOMIC, pages);
 577         buf_out = (void *)__get_free_pages(GFP_ATOMIC, pages);
 578
 579         if (!buf_in || !buf_out) {
 580                 pr_err("Couldn't allocated pages for unaligned cases.\n");
 581                 return -1;
 582         }
 583
 584         dd->orig_out = dd->out_sg;
 585
 586         sg_copy_buf(buf_in, dd->in_sg, 0, dd->total, 0);
 587
 588         sg_init_table(&dd->in_sgl, 1);
 589         sg_set_buf(&dd->in_sgl, buf_in, dd->total);
 590         dd->in_sg = &dd->in_sgl;
 591
 592         sg_init_table(&dd->out_sgl, 1);
 593         sg_set_buf(&dd->out_sgl, buf_out, dd->total);
 594         dd->out_sg = &dd->out_sgl;
 595
 596         return 0;
 597 }
 598
 599 static int omap_aes_handle_queue(struct omap_aes_dev *dd,
 600                                struct ablkcipher_request *req)
 601 {
 602         struct crypto_async_request *async_req, *backlog;
 603         struct omap_aes_ctx *ctx;
 604         struct omap_aes_reqctx *rctx;
 605         unsigned long flags;
 606         int err, ret = 0;
 607
 608         spin_lock_irqsave(&dd->lock, flags);
 609         if (req)
 610                 ret = ablkcipher_enqueue_request(&dd->queue, req);
 611         if (dd->flags & FLAGS_BUSY) {
 612                 spin_unlock_irqrestore(&dd->lock, flags);
 613                 return ret;
 614         }
 615         backlog = crypto_get_backlog(&dd->queue);
 616         async_req = crypto_dequeue_request(&dd->queue);
 617         if (async_req)
 618                 dd->flags |= FLAGS_BUSY;
 619         spin_unlock_irqrestore(&dd->lock, flags);
 620
 621         if (!async_req)
 622                 return ret;
 623
 624         if (backlog)
 625                 backlog->complete(backlog, -EINPROGRESS);
 626
 627         req = ablkcipher_request_cast(async_req);
 628
 629         /* assign new request to device */
 630         dd->req = req;
 631         dd->total = req->nbytes;
 632         dd->total_save = req->nbytes;
 633         dd->in_sg = req->src;
 634         dd->out_sg = req->dst;
 635
 636         if (omap_aes_check_aligned(dd->in_sg) ||
 637             omap_aes_check_aligned(dd->out_sg)) {
 638                 if (omap_aes_copy_sgs(dd))
 639                         pr_err("Failed to copy SGs for unaligned cases\n");
 640                 dd->sgs_copied = 1;
 641         } else {
 642                 dd->sgs_copied = 0;
 643         }
 644
 645         dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, dd->total);
 646         dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, dd->total);
 647         BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0);
 648
 649         rctx = ablkcipher_request_ctx(req);
 650         ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req));
 651         rctx->mode &= FLAGS_MODE_MASK;
 652         dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode;
 653
 654         dd->ctx = ctx;
 655         ctx->dd = dd;
 656
 657         err = omap_aes_write_ctrl(dd);
 658         if (!err)
 659                 err = omap_aes_crypt_dma_start(dd);
 660         if (err) {
 661                 /* aes_task will not finish it, so do it here */
 662                 omap_aes_finish_req(dd, err);
 663                 tasklet_schedule(&dd->queue_task);
 664         }
 665
 666         return ret; /* return ret, which is enqueue return value */
 667 }
 668
 669 static void omap_aes_done_task(unsigned long data)
 670 {
 671         struct omap_aes_dev *dd = (struct omap_aes_dev *)data;
 672         void *buf_in, *buf_out;
 673         int pages;
 674
 675         pr_debug("enter done_task\n");
 676
 677         if (!dd->pio_only) {
 678                 dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len,
 679                                        DMA_FROM_DEVICE);
 680                 dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
 681                 dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len,
 682                              DMA_FROM_DEVICE);
 683                 omap_aes_crypt_dma_stop(dd);
 684         }
 685
 686         if (dd->sgs_copied) {
 687                 buf_in = sg_virt(&dd->in_sgl);
 688                 buf_out = sg_virt(&dd->out_sgl);
 689
 690                 sg_copy_buf(buf_out, dd->orig_out, 0, dd->total_save, 1);
 691
 692                 pages = get_order(dd->total_save);
 693                 free_pages((unsigned long)buf_in, pages);
 694                 free_pages((unsigned long)buf_out, pages);
 695         }
 696
 697         omap_aes_finish_req(dd, 0);
 698         omap_aes_handle_queue(dd, NULL);
 699
 700         pr_debug("exit\n");
 701 }
 702
 703 static void omap_aes_queue_task(unsigned long data)
 704 {
 705         struct omap_aes_dev *dd = (struct omap_aes_dev *)data;
 706
 707         omap_aes_handle_queue(dd, NULL);
 708 }
 709
 710 static int omap_aes_crypt(struct ablkcipher_request *req, unsigned long mode)
 711 {
 712         struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(
 713                         crypto_ablkcipher_reqtfm(req));
 714         struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req);
 715         struct omap_aes_dev *dd;
 716
 717         pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->nbytes,
 718                   !!(mode & FLAGS_ENCRYPT),
 719                   !!(mode & FLAGS_CBC));
 720
 721         if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) {
 722                 pr_err("request size is not exact amount of AES blocks\n");
 723                 return -EINVAL;
 724         }
 725
 726         dd = omap_aes_find_dev(ctx);
 727         if (!dd)
 728                 return -ENODEV;
 729
 730         rctx->mode = mode;
 731
 732         return omap_aes_handle_queue(dd, req);
 733 }
 734
 735 /* ********************** ALG API ************************************ */
 736
 737 static int omap_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
 738                            unsigned int keylen)
 739 {
 740         struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 741
 742         if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 &&
 743                    keylen != AES_KEYSIZE_256)
 744                 return -EINVAL;
 745
 746         pr_debug("enter, keylen: %d\n", keylen);
 747
 748         memcpy(ctx->key, key, keylen);
 749         ctx->keylen = keylen;
 750
 751         return 0;
 752 }
 753
 754 static int omap_aes_ecb_encrypt(struct ablkcipher_request *req)
 755 {
 756         return omap_aes_crypt(req, FLAGS_ENCRYPT);
 757 }
 758
 759 static int omap_aes_ecb_decrypt(struct ablkcipher_request *req)
 760 {
 761         return omap_aes_crypt(req, 0);
 762 }
 763
 764 static int omap_aes_cbc_encrypt(struct ablkcipher_request *req)
 765 {
 766         return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC);
 767 }
 768
 769 static int omap_aes_cbc_decrypt(struct ablkcipher_request *req)
 770 {
 771         return omap_aes_crypt(req, FLAGS_CBC);
 772 }
 773
 774 static int omap_aes_ctr_encrypt(struct ablkcipher_request *req)
 775 {
 776         return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CTR);
 777 }
 778
 779 static int omap_aes_ctr_decrypt(struct ablkcipher_request *req)
 780 {
 781         return omap_aes_crypt(req, FLAGS_CTR);
 782 }
 783
 784 static int omap_aes_cra_init(struct crypto_tfm *tfm)
 785 {
 786         struct omap_aes_dev *dd = NULL;
 787
 788         /* Find AES device, currently picks the first device */
 789         spin_lock_bh(&list_lock);
 790         list_for_each_entry(dd, &dev_list, list) {
 791                 break;
 792         }
 793         spin_unlock_bh(&list_lock);
 794
 795         pm_runtime_get_sync(dd->dev);
 796         tfm->crt_ablkcipher.reqsize = sizeof(struct omap_aes_reqctx);
 797
 798         return 0;
 799 }
 800
 801 static void omap_aes_cra_exit(struct crypto_tfm *tfm)
 802 {
 803         struct omap_aes_dev *dd = NULL;
 804
 805         /* Find AES device, currently picks the first device */
 806         spin_lock_bh(&list_lock);
 807         list_for_each_entry(dd, &dev_list, list) {
 808                 break;
 809         }
 810         spin_unlock_bh(&list_lock);
 811
 812         pm_runtime_put_sync(dd->dev);
 813 }
 814
 815 /* ********************** ALGS ************************************ */
 816
 817 static struct crypto_alg algs_ecb_cbc[] = {
 818 {
 819         .cra_name               = "ecb(aes)",
 820         .cra_driver_name        = "ecb-aes-omap",
 821         .cra_priority           = 100,
 822         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER |
 823                                   CRYPTO_ALG_KERN_DRIVER_ONLY |
 824                                   CRYPTO_ALG_ASYNC,
 825         .cra_blocksize          = AES_BLOCK_SIZE,
 826         .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 827         .cra_alignmask          = 0,
 828         .cra_type               = &crypto_ablkcipher_type,
 829         .cra_module             = THIS_MODULE,
 830         .cra_init               = omap_aes_cra_init,
 831         .cra_exit               = omap_aes_cra_exit,
 832         .cra_u.ablkcipher = {
 833                 .min_keysize    = AES_MIN_KEY_SIZE,
 834                 .max_keysize    = AES_MAX_KEY_SIZE,
 835                 .setkey         = omap_aes_setkey,
 836                 .encrypt        = omap_aes_ecb_encrypt,
 837                 .decrypt        = omap_aes_ecb_decrypt,
 838         }
 839 },
 840 {
 841         .cra_name               = "cbc(aes)",
 842         .cra_driver_name        = "cbc-aes-omap",
 843         .cra_priority           = 100,
 844         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER |
 845                                   CRYPTO_ALG_KERN_DRIVER_ONLY |
 846                                   CRYPTO_ALG_ASYNC,
 847         .cra_blocksize          = AES_BLOCK_SIZE,
 848         .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 849         .cra_alignmask          = 0,
 850         .cra_type               = &crypto_ablkcipher_type,
 851         .cra_module             = THIS_MODULE,
 852         .cra_init               = omap_aes_cra_init,
 853         .cra_exit               = omap_aes_cra_exit,
 854         .cra_u.ablkcipher = {
 855                 .min_keysize    = AES_MIN_KEY_SIZE,
 856                 .max_keysize    = AES_MAX_KEY_SIZE,
 857                 .ivsize         = AES_BLOCK_SIZE,
 858                 .setkey         = omap_aes_setkey,
 859                 .encrypt        = omap_aes_cbc_encrypt,
 860                 .decrypt        = omap_aes_cbc_decrypt,
 861         }
 862 }
 863 };
 864
 865 static struct crypto_alg algs_ctr[] = {
 866 {
 867         .cra_name               = "ctr(aes)",
 868         .cra_driver_name        = "ctr-aes-omap",
 869         .cra_priority           = 100,
 870         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER |
 871                                   CRYPTO_ALG_KERN_DRIVER_ONLY |
 872                                   CRYPTO_ALG_ASYNC,
 873         .cra_blocksize          = AES_BLOCK_SIZE,
 874         .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 875         .cra_alignmask          = 0,
 876         .cra_type               = &crypto_ablkcipher_type,
 877         .cra_module             = THIS_MODULE,
 878         .cra_init               = omap_aes_cra_init,
 879         .cra_exit               = omap_aes_cra_exit,
 880         .cra_u.ablkcipher = {
 881                 .min_keysize    = AES_MIN_KEY_SIZE,
 882                 .max_keysize    = AES_MAX_KEY_SIZE,
 883                 .geniv          = "eseqiv",
 884                 .ivsize         = AES_BLOCK_SIZE,
 885                 .setkey         = omap_aes_setkey,
 886                 .encrypt        = omap_aes_ctr_encrypt,
 887                 .decrypt        = omap_aes_ctr_decrypt,
 888         }
 889 } ,
 890 };
 891
 892 static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc[] = {
 893         {
 894                 .algs_list      = algs_ecb_cbc,
 895                 .size           = ARRAY_SIZE(algs_ecb_cbc),
 896         },
 897 };
 898
 899 static const struct omap_aes_pdata omap_aes_pdata_omap2 = {
 900         .algs_info      = omap_aes_algs_info_ecb_cbc,
 901         .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc),
 902         .trigger        = omap_aes_dma_trigger_omap2,
 903         .key_ofs        = 0x1c,
 904         .iv_ofs         = 0x20,
 905         .ctrl_ofs       = 0x30,
 906         .data_ofs       = 0x34,
 907         .rev_ofs        = 0x44,
 908         .mask_ofs       = 0x48,
 909         .dma_enable_in  = BIT(2),
 910         .dma_enable_out = BIT(3),
 911         .dma_start      = BIT(5),
 912         .major_mask     = 0xf0,
 913         .major_shift    = 4,
 914         .minor_mask     = 0x0f,
 915         .minor_shift    = 0,
 916 };
 917
 918 #ifdef CONFIG_OF
 919 static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc_ctr[] = {
 920         {
 921                 .algs_list      = algs_ecb_cbc,
 922                 .size           = ARRAY_SIZE(algs_ecb_cbc),
 923         },
 924         {
 925                 .algs_list      = algs_ctr,
 926                 .size           = ARRAY_SIZE(algs_ctr),
 927         },
 928 };
 929
 930 static const struct omap_aes_pdata omap_aes_pdata_omap3 = {
 931         .algs_info      = omap_aes_algs_info_ecb_cbc_ctr,
 932         .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr),
 933         .trigger        = omap_aes_dma_trigger_omap2,
 934         .key_ofs        = 0x1c,
 935         .iv_ofs         = 0x20,
 936         .ctrl_ofs       = 0x30,
 937         .data_ofs       = 0x34,
 938         .rev_ofs        = 0x44,
 939         .mask_ofs       = 0x48,
 940         .dma_enable_in  = BIT(2),
 941         .dma_enable_out = BIT(3),
 942         .dma_start      = BIT(5),
 943         .major_mask     = 0xf0,
 944         .major_shift    = 4,
 945         .minor_mask     = 0x0f,
 946         .minor_shift    = 0,
 947 };
 948
 949 static const struct omap_aes_pdata omap_aes_pdata_omap4 = {
 950         .algs_info      = omap_aes_algs_info_ecb_cbc_ctr,
 951         .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr),
 952         .trigger        = omap_aes_dma_trigger_omap4,
 953         .key_ofs        = 0x3c,
 954         .iv_ofs         = 0x40,
 955         .ctrl_ofs       = 0x50,
 956         .data_ofs       = 0x60,
 957         .rev_ofs        = 0x80,
 958         .mask_ofs       = 0x84,
 959         .irq_status_ofs = 0x8c,
 960         .irq_enable_ofs = 0x90,
 961         .dma_enable_in  = BIT(5),
 962         .dma_enable_out = BIT(6),
 963         .major_mask     = 0x0700,
 964         .major_shift    = 8,
 965         .minor_mask     = 0x003f,
 966         .minor_shift    = 0,
 967 };
 968
 969 static irqreturn_t omap_aes_irq(int irq, void *dev_id)
 970 {
 971         struct omap_aes_dev *dd = dev_id;
 972         u32 status, i;
 973         u32 *src, *dst;
 974
 975         status = omap_aes_read(dd, AES_REG_IRQ_STATUS(dd));
 976         if (status & AES_REG_IRQ_DATA_IN) {
 977                 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0);
 978
 979                 BUG_ON(!dd->in_sg);
 980
 981                 BUG_ON(_calc_walked(in) > dd->in_sg->length);
 982
 983                 src = sg_virt(dd->in_sg) + _calc_walked(in);
 984
 985                 for (i = 0; i < AES_BLOCK_WORDS; i++) {
 986                         omap_aes_write(dd, AES_REG_DATA_N(dd, i), *src);
 987
 988                         scatterwalk_advance(&dd->in_walk, 4);
 989                         if (dd->in_sg->length == _calc_walked(in)) {
 990                                 dd->in_sg = scatterwalk_sg_next(dd->in_sg);
 991                                 if (dd->in_sg) {
 992                                         scatterwalk_start(&dd->in_walk,
 993                                                           dd->in_sg);
 994                                         src = sg_virt(dd->in_sg) +
 995                                               _calc_walked(in);
 996                                 }
 997                         } else {
 998                                 src++;
 999                         }
1000                 }
1001
1002                 /* Clear IRQ status */
1003                 status &= ~AES_REG_IRQ_DATA_IN;
1004                 omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status);
1005
1006                 /* Enable DATA_OUT interrupt */
1007                 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x4);
1008
1009         } else if (status & AES_REG_IRQ_DATA_OUT) {
1010                 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0);
1011
1012                 BUG_ON(!dd->out_sg);
1013
1014                 BUG_ON(_calc_walked(out) > dd->out_sg->length);
1015
1016                 dst = sg_virt(dd->out_sg) + _calc_walked(out);
1017
1018                 for (i = 0; i < AES_BLOCK_WORDS; i++) {
1019                         *dst = omap_aes_read(dd, AES_REG_DATA_N(dd, i));
1020                         scatterwalk_advance(&dd->out_walk, 4);
1021                         if (dd->out_sg->length == _calc_walked(out)) {
1022                                 dd->out_sg = scatterwalk_sg_next(dd->out_sg);
1023                                 if (dd->out_sg) {
1024                                         scatterwalk_start(&dd->out_walk,
1025                                                           dd->out_sg);
1026                                         dst = sg_virt(dd->out_sg) +
1027                                               _calc_walked(out);
1028                                 }
1029                         } else {
1030                                 dst++;
1031                         }
1032                 }
1033
1034                 dd->total -= AES_BLOCK_SIZE;
1035
1036                 BUG_ON(dd->total < 0);
1037
1038                 /* Clear IRQ status */
1039                 status &= ~AES_REG_IRQ_DATA_OUT;
1040                 omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status);
1041
1042                 if (!dd->total)
1043                         /* All bytes read! */
1044                         tasklet_schedule(&dd->done_task);
1045                 else
1046                         /* Enable DATA_IN interrupt for next block */
1047                         omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2);
1048         }
1049
1050         return IRQ_HANDLED;
1051 }
1052
1053 static const struct of_device_id omap_aes_of_match[] = {
1054         {
1055                 .compatible     = "ti,omap2-aes",
1056                 .data           = &omap_aes_pdata_omap2,
1057         },
1058         {
1059                 .compatible     = "ti,omap3-aes",
1060                 .data           = &omap_aes_pdata_omap3,
1061         },
1062         {
1063                 .compatible     = "ti,omap4-aes",
1064                 .data           = &omap_aes_pdata_omap4,
1065         },
1066         {},
1067 };
1068 MODULE_DEVICE_TABLE(of, omap_aes_of_match);
1069
1070 static int omap_aes_get_res_of(struct omap_aes_dev *dd,
1071                 struct device *dev, struct resource *res)
1072 {
1073         struct device_node *node = dev->of_node;
1074         const struct of_device_id *match;
1075         int err = 0;
1076
1077         match = of_match_device(of_match_ptr(omap_aes_of_match), dev);
1078         if (!match) {
1079                 dev_err(dev, "no compatible OF match\n");
1080                 err = -EINVAL;
1081                 goto err;
1082         }
1083
1084         err = of_address_to_resource(node, 0, res);
1085         if (err < 0) {
1086                 dev_err(dev, "can't translate OF node address\n");
1087                 err = -EINVAL;
1088                 goto err;
1089         }
1090
1091         dd->dma_out = -1; /* Dummy value that's unused */
1092         dd->dma_in = -1; /* Dummy value that's unused */
1093
1094         dd->pdata = match->data;
1095
1096 err:
1097         return err;
1098 }
1099 #else
1100 static const struct of_device_id omap_aes_of_match[] = {
1101         {},
1102 };
1103
1104 static int omap_aes_get_res_of(struct omap_aes_dev *dd,
1105                 struct device *dev, struct resource *res)
1106 {
1107         return -EINVAL;
1108 }
1109 #endif
1110
1111 static int omap_aes_get_res_pdev(struct omap_aes_dev *dd,
1112                 struct platform_device *pdev, struct resource *res)
1113 {
1114         struct device *dev = &pdev->dev;
1115         struct resource *r;
1116         int err = 0;
1117
1118         /* Get the base address */
1119         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1120         if (!r) {
1121                 dev_err(dev, "no MEM resource info\n");
1122                 err = -ENODEV;
1123                 goto err;
1124         }
1125         memcpy(res, r, sizeof(*res));
1126
1127         /* Get the DMA out channel */
1128         r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1129         if (!r) {
1130                 dev_err(dev, "no DMA out resource info\n");
1131                 err = -ENODEV;
1132                 goto err;
1133         }
1134         dd->dma_out = r->start;
1135
1136         /* Get the DMA in channel */
1137         r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1138         if (!r) {
1139                 dev_err(dev, "no DMA in resource info\n");
1140                 err = -ENODEV;
1141                 goto err;
1142         }
1143         dd->dma_in = r->start;
1144
1145         /* Only OMAP2/3 can be non-DT */
1146         dd->pdata = &omap_aes_pdata_omap2;
1147
1148 err:
1149         return err;
1150 }
1151
1152 static int omap_aes_probe(struct platform_device *pdev)
1153 {
1154         struct device *dev = &pdev->dev;
1155         struct omap_aes_dev *dd;
1156         struct crypto_alg *algp;
1157         struct resource res;
1158         int err = -ENOMEM, i, j, irq = -1;
1159         u32 reg;
1160
1161         dd = devm_kzalloc(dev, sizeof(struct omap_aes_dev), GFP_KERNEL);
1162         if (dd == NULL) {
1163                 dev_err(dev, "unable to alloc data struct.\n");
1164                 goto err_data;
1165         }
1166         dd->dev = dev;
1167         platform_set_drvdata(pdev, dd);
1168
1169         spin_lock_init(&dd->lock);
1170         crypto_init_queue(&dd->queue, OMAP_AES_QUEUE_LENGTH);
1171
1172         err = (dev->of_node) ? omap_aes_get_res_of(dd, dev, &res) :
1173                                omap_aes_get_res_pdev(dd, pdev, &res);
1174         if (err)
1175                 goto err_res;
1176
1177         dd->io_base = devm_ioremap_resource(dev, &res);
1178         if (IS_ERR(dd->io_base)) {
1179                 err = PTR_ERR(dd->io_base);
1180                 goto err_res;
1181         }
1182         dd->phys_base = res.start;
1183
1184         pm_runtime_enable(dev);
1185         pm_runtime_get_sync(dev);
1186
1187         omap_aes_dma_stop(dd);
1188
1189         reg = omap_aes_read(dd, AES_REG_REV(dd));
1190
1191         pm_runtime_put_sync(dev);
1192
1193         dev_info(dev, "OMAP AES hw accel rev: %u.%u\n",
1194                  (reg & dd->pdata->major_mask) >> dd->pdata->major_shift,
1195                  (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
1196
1197         tasklet_init(&dd->done_task, omap_aes_done_task, (unsigned long)dd);
1198         tasklet_init(&dd->queue_task, omap_aes_queue_task, (unsigned long)dd);
1199
1200         err = omap_aes_dma_init(dd);
1201         if (err && AES_REG_IRQ_STATUS(dd) && AES_REG_IRQ_ENABLE(dd)) {
1202                 dd->pio_only = 1;
1203
1204                 irq = platform_get_irq(pdev, 0);
1205                 if (irq < 0) {
1206                         dev_err(dev, "can't get IRQ resource\n");
1207                         goto err_irq;
1208                 }
1209
1210                 err = devm_request_irq(dev, irq, omap_aes_irq, 0,
1211                                 dev_name(dev), dd);
1212                 if (err) {
1213                         dev_err(dev, "Unable to grab omap-aes IRQ\n");
1214                         goto err_irq;
1215                 }
1216         }
1217
1218
1219         INIT_LIST_HEAD(&dd->list);
1220         spin_lock(&list_lock);
1221         list_add_tail(&dd->list, &dev_list);
1222         spin_unlock(&list_lock);
1223
1224         for (i = 0; i < dd->pdata->algs_info_size; i++) {
1225                 for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
1226                         algp = &dd->pdata->algs_info[i].algs_list[j];
1227
1228                         pr_debug("reg alg: %s\n", algp->cra_name);
1229                         INIT_LIST_HEAD(&algp->cra_list);
1230
1231                         err = crypto_register_alg(algp);
1232                         if (err)
1233                                 goto err_algs;
1234
1235                         dd->pdata->algs_info[i].registered++;
1236                 }
1237         }
1238
1239         return 0;
1240 err_algs:
1241         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1242                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1243                         crypto_unregister_alg(
1244                                         &dd->pdata->algs_info[i].algs_list[j]);
1245         if (!dd->pio_only)
1246                 omap_aes_dma_cleanup(dd);
1247 err_irq:
1248         tasklet_kill(&dd->done_task);
1249         tasklet_kill(&dd->queue_task);
1250         pm_runtime_disable(dev);
1251 err_res:
1252         dd = NULL;
1253 err_data:
1254         dev_err(dev, "initialization failed.\n");
1255         return err;
1256 }
1257
1258 static int omap_aes_remove(struct platform_device *pdev)
1259 {
1260         struct omap_aes_dev *dd = platform_get_drvdata(pdev);
1261         int i, j;
1262
1263         if (!dd)
1264                 return -ENODEV;
1265
1266         spin_lock(&list_lock);
1267         list_del(&dd->list);
1268         spin_unlock(&list_lock);
1269
1270         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1271                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1272                         crypto_unregister_alg(
1273                                         &dd->pdata->algs_info[i].algs_list[j]);
1274
1275         tasklet_kill(&dd->done_task);
1276         tasklet_kill(&dd->queue_task);
1277         omap_aes_dma_cleanup(dd);
1278         pm_runtime_disable(dd->dev);
1279         dd = NULL;
1280
1281         return 0;
1282 }
1283
1284 #ifdef CONFIG_PM_SLEEP
1285 static int omap_aes_suspend(struct device *dev)
1286 {
1287         pm_runtime_put_sync(dev);
1288         return 0;
1289 }
1290
1291 static int omap_aes_resume(struct device *dev)
1292 {
1293         pm_runtime_get_sync(dev);
1294         return 0;
1295 }
1296 #endif
1297
1298 static const struct dev_pm_ops omap_aes_pm_ops = {
1299         SET_SYSTEM_SLEEP_PM_OPS(omap_aes_suspend, omap_aes_resume)
1300 };
1301
1302 static struct platform_driver omap_aes_driver = {
1303         .probe  = omap_aes_probe,
1304         .remove = omap_aes_remove,
1305         .driver = {
1306                 .name   = "omap-aes",
1307                 .owner  = THIS_MODULE,
1308                 .pm     = &omap_aes_pm_ops,
1309                 .of_match_table = omap_aes_of_match,
1310         },
1311 };
1312
1313 module_platform_driver(omap_aes_driver);
1314
1315 MODULE_DESCRIPTION("OMAP AES hw acceleration support.");
1316 MODULE_LICENSE("GPL v2");
1317 MODULE_AUTHOR("Dmitry Kasatkin");
1318