drivers/crypto/omap-sham.c

   1 /*
   2  * Cryptographic API.
   3  *
   4  * Support for OMAP SHA1/MD5 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  * Some ideas are from old omap-sha1-md5.c driver.
  15  */
  16
  17 #define pr_fmt(fmt) "%s: " fmt, __func__
  18
  19 #include <linux/err.h>
  20 #include <linux/device.h>
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/errno.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/kernel.h>
  26 #include <linux/irq.h>
  27 #include <linux/io.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/scatterlist.h>
  30 #include <linux/dma-mapping.h>
  31 #include <linux/dmaengine.h>
  32 #include <linux/pm_runtime.h>
  33 #include <linux/of.h>
  34 #include <linux/of_device.h>
  35 #include <linux/of_address.h>
  36 #include <linux/of_irq.h>
  37 #include <linux/delay.h>
  38 #include <linux/crypto.h>
  39 #include <linux/cryptohash.h>
  40 #include <crypto/scatterwalk.h>
  41 #include <crypto/algapi.h>
  42 #include <crypto/sha.h>
  43 #include <crypto/hash.h>
  44 #include <crypto/hmac.h>
  45 #include <crypto/internal/hash.h>
  46
  47 #define MD5_DIGEST_SIZE                 16
  48
  49 #define SHA_REG_IDIGEST(dd, x)          ((dd)->pdata->idigest_ofs + ((x)*0x04))
  50 #define SHA_REG_DIN(dd, x)              ((dd)->pdata->din_ofs + ((x) * 0x04))
  51 #define SHA_REG_DIGCNT(dd)              ((dd)->pdata->digcnt_ofs)
  52
  53 #define SHA_REG_ODIGEST(dd, x)          ((dd)->pdata->odigest_ofs + (x * 0x04))
  54
  55 #define SHA_REG_CTRL                    0x18
  56 #define SHA_REG_CTRL_LENGTH             (0xFFFFFFFF << 5)
  57 #define SHA_REG_CTRL_CLOSE_HASH         (1 << 4)
  58 #define SHA_REG_CTRL_ALGO_CONST         (1 << 3)
  59 #define SHA_REG_CTRL_ALGO               (1 << 2)
  60 #define SHA_REG_CTRL_INPUT_READY        (1 << 1)
  61 #define SHA_REG_CTRL_OUTPUT_READY       (1 << 0)
  62
  63 #define SHA_REG_REV(dd)                 ((dd)->pdata->rev_ofs)
  64
  65 #define SHA_REG_MASK(dd)                ((dd)->pdata->mask_ofs)
  66 #define SHA_REG_MASK_DMA_EN             (1 << 3)
  67 #define SHA_REG_MASK_IT_EN              (1 << 2)
  68 #define SHA_REG_MASK_SOFTRESET          (1 << 1)
  69 #define SHA_REG_AUTOIDLE                (1 << 0)
  70
  71 #define SHA_REG_SYSSTATUS(dd)           ((dd)->pdata->sysstatus_ofs)
  72 #define SHA_REG_SYSSTATUS_RESETDONE     (1 << 0)
  73
  74 #define SHA_REG_MODE(dd)                ((dd)->pdata->mode_ofs)
  75 #define SHA_REG_MODE_HMAC_OUTER_HASH    (1 << 7)
  76 #define SHA_REG_MODE_HMAC_KEY_PROC      (1 << 5)
  77 #define SHA_REG_MODE_CLOSE_HASH         (1 << 4)
  78 #define SHA_REG_MODE_ALGO_CONSTANT      (1 << 3)
  79
  80 #define SHA_REG_MODE_ALGO_MASK          (7 << 0)
  81 #define SHA_REG_MODE_ALGO_MD5_128       (0 << 1)
  82 #define SHA_REG_MODE_ALGO_SHA1_160      (1 << 1)
  83 #define SHA_REG_MODE_ALGO_SHA2_224      (2 << 1)
  84 #define SHA_REG_MODE_ALGO_SHA2_256      (3 << 1)
  85 #define SHA_REG_MODE_ALGO_SHA2_384      (1 << 0)
  86 #define SHA_REG_MODE_ALGO_SHA2_512      (3 << 0)
  87
  88 #define SHA_REG_LENGTH(dd)              ((dd)->pdata->length_ofs)
  89
  90 #define SHA_REG_IRQSTATUS               0x118
  91 #define SHA_REG_IRQSTATUS_CTX_RDY       (1 << 3)
  92 #define SHA_REG_IRQSTATUS_PARTHASH_RDY (1 << 2)
  93 #define SHA_REG_IRQSTATUS_INPUT_RDY     (1 << 1)
  94 #define SHA_REG_IRQSTATUS_OUTPUT_RDY    (1 << 0)
  95
  96 #define SHA_REG_IRQENA                  0x11C
  97 #define SHA_REG_IRQENA_CTX_RDY          (1 << 3)
  98 #define SHA_REG_IRQENA_PARTHASH_RDY     (1 << 2)
  99 #define SHA_REG_IRQENA_INPUT_RDY        (1 << 1)
 100 #define SHA_REG_IRQENA_OUTPUT_RDY       (1 << 0)
 101
 102 #define DEFAULT_TIMEOUT_INTERVAL        HZ
 103
 104 #define DEFAULT_AUTOSUSPEND_DELAY       1000
 105
 106 /* mostly device flags */
 107 #define FLAGS_BUSY              0
 108 #define FLAGS_FINAL             1
 109 #define FLAGS_DMA_ACTIVE        2
 110 #define FLAGS_OUTPUT_READY      3
 111 #define FLAGS_INIT              4
 112 #define FLAGS_CPU               5
 113 #define FLAGS_DMA_READY         6
 114 #define FLAGS_AUTO_XOR          7
 115 #define FLAGS_BE32_SHA1         8
 116 #define FLAGS_SGS_COPIED        9
 117 #define FLAGS_SGS_ALLOCED       10
 118 /* context flags */
 119 #define FLAGS_FINUP             16
 120
 121 #define FLAGS_MODE_SHIFT        18
 122 #define FLAGS_MODE_MASK         (SHA_REG_MODE_ALGO_MASK << FLAGS_MODE_SHIFT)
 123 #define FLAGS_MODE_MD5          (SHA_REG_MODE_ALGO_MD5_128 << FLAGS_MODE_SHIFT)
 124 #define FLAGS_MODE_SHA1         (SHA_REG_MODE_ALGO_SHA1_160 << FLAGS_MODE_SHIFT)
 125 #define FLAGS_MODE_SHA224       (SHA_REG_MODE_ALGO_SHA2_224 << FLAGS_MODE_SHIFT)
 126 #define FLAGS_MODE_SHA256       (SHA_REG_MODE_ALGO_SHA2_256 << FLAGS_MODE_SHIFT)
 127 #define FLAGS_MODE_SHA384       (SHA_REG_MODE_ALGO_SHA2_384 << FLAGS_MODE_SHIFT)
 128 #define FLAGS_MODE_SHA512       (SHA_REG_MODE_ALGO_SHA2_512 << FLAGS_MODE_SHIFT)
 129
 130 #define FLAGS_HMAC              21
 131 #define FLAGS_ERROR             22
 132
 133 #define OP_UPDATE               1
 134 #define OP_FINAL                2
 135
 136 #define OMAP_ALIGN_MASK         (sizeof(u32)-1)
 137 #define OMAP_ALIGNED            __attribute__((aligned(sizeof(u32))))
 138
 139 #define BUFLEN                  SHA512_BLOCK_SIZE
 140 #define OMAP_SHA_DMA_THRESHOLD  256
 141
 142 struct omap_sham_dev;
 143
 144 struct omap_sham_reqctx {
 145         struct omap_sham_dev    *dd;
 146         unsigned long           flags;
 147         unsigned long           op;
 148
 149         u8                      digest[SHA512_DIGEST_SIZE] OMAP_ALIGNED;
 150         size_t                  digcnt;
 151         size_t                  bufcnt;
 152         size_t                  buflen;
 153
 154         /* walk state */
 155         struct scatterlist      *sg;
 156         struct scatterlist      sgl[2];
 157         int                     offset; /* offset in current sg */
 158         int                     sg_len;
 159         unsigned int            total;  /* total request */
 160
 161         u8                      buffer[0] OMAP_ALIGNED;
 162 };
 163
 164 struct omap_sham_hmac_ctx {
 165         struct crypto_shash     *shash;
 166         u8                      ipad[SHA512_BLOCK_SIZE] OMAP_ALIGNED;
 167         u8                      opad[SHA512_BLOCK_SIZE] OMAP_ALIGNED;
 168 };
 169
 170 struct omap_sham_ctx {
 171         struct omap_sham_dev    *dd;
 172
 173         unsigned long           flags;
 174
 175         /* fallback stuff */
 176         struct crypto_shash     *fallback;
 177
 178         struct omap_sham_hmac_ctx base[0];
 179 };
 180
 181 #define OMAP_SHAM_QUEUE_LENGTH  10
 182
 183 struct omap_sham_algs_info {
 184         struct ahash_alg        *algs_list;
 185         unsigned int            size;
 186         unsigned int            registered;
 187 };
 188
 189 struct omap_sham_pdata {
 190         struct omap_sham_algs_info      *algs_info;
 191         unsigned int    algs_info_size;
 192         unsigned long   flags;
 193         int             digest_size;
 194
 195         void            (*copy_hash)(struct ahash_request *req, int out);
 196         void            (*write_ctrl)(struct omap_sham_dev *dd, size_t length,
 197                                       int final, int dma);
 198         void            (*trigger)(struct omap_sham_dev *dd, size_t length);
 199         int             (*poll_irq)(struct omap_sham_dev *dd);
 200         irqreturn_t     (*intr_hdlr)(int irq, void *dev_id);
 201
 202         u32             odigest_ofs;
 203         u32             idigest_ofs;
 204         u32             din_ofs;
 205         u32             digcnt_ofs;
 206         u32             rev_ofs;
 207         u32             mask_ofs;
 208         u32             sysstatus_ofs;
 209         u32             mode_ofs;
 210         u32             length_ofs;
 211
 212         u32             major_mask;
 213         u32             major_shift;
 214         u32             minor_mask;
 215         u32             minor_shift;
 216 };
 217
 218 struct omap_sham_dev {
 219         struct list_head        list;
 220         unsigned long           phys_base;
 221         struct device           *dev;
 222         void __iomem            *io_base;
 223         int                     irq;
 224         spinlock_t              lock;
 225         int                     err;
 226         struct dma_chan         *dma_lch;
 227         struct tasklet_struct   done_task;
 228         u8                      polling_mode;
 229         u8                      xmit_buf[BUFLEN] OMAP_ALIGNED;
 230
 231         unsigned long           flags;
 232         struct crypto_queue     queue;
 233         struct ahash_request    *req;
 234
 235         const struct omap_sham_pdata    *pdata;
 236 };
 237
 238 struct omap_sham_drv {
 239         struct list_head        dev_list;
 240         spinlock_t              lock;
 241         unsigned long           flags;
 242 };
 243
 244 static struct omap_sham_drv sham = {
 245         .dev_list = LIST_HEAD_INIT(sham.dev_list),
 246         .lock = __SPIN_LOCK_UNLOCKED(sham.lock),
 247 };
 248
 249 static inline u32 omap_sham_read(struct omap_sham_dev *dd, u32 offset)
 250 {
 251         return __raw_readl(dd->io_base + offset);
 252 }
 253
 254 static inline void omap_sham_write(struct omap_sham_dev *dd,
 255                                         u32 offset, u32 value)
 256 {
 257         __raw_writel(value, dd->io_base + offset);
 258 }
 259
 260 static inline void omap_sham_write_mask(struct omap_sham_dev *dd, u32 address,
 261                                         u32 value, u32 mask)
 262 {
 263         u32 val;
 264
 265         val = omap_sham_read(dd, address);
 266         val &= ~mask;
 267         val |= value;
 268         omap_sham_write(dd, address, val);
 269 }
 270
 271 static inline int omap_sham_wait(struct omap_sham_dev *dd, u32 offset, u32 bit)
 272 {
 273         unsigned long timeout = jiffies + DEFAULT_TIMEOUT_INTERVAL;
 274
 275         while (!(omap_sham_read(dd, offset) & bit)) {
 276                 if (time_is_before_jiffies(timeout))
 277                         return -ETIMEDOUT;
 278         }
 279
 280         return 0;
 281 }
 282
 283 static void omap_sham_copy_hash_omap2(struct ahash_request *req, int out)
 284 {
 285         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 286         struct omap_sham_dev *dd = ctx->dd;
 287         u32 *hash = (u32 *)ctx->digest;
 288         int i;
 289
 290         for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) {
 291                 if (out)
 292                         hash[i] = omap_sham_read(dd, SHA_REG_IDIGEST(dd, i));
 293                 else
 294                         omap_sham_write(dd, SHA_REG_IDIGEST(dd, i), hash[i]);
 295         }
 296 }
 297
 298 static void omap_sham_copy_hash_omap4(struct ahash_request *req, int out)
 299 {
 300         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 301         struct omap_sham_dev *dd = ctx->dd;
 302         int i;
 303
 304         if (ctx->flags & BIT(FLAGS_HMAC)) {
 305                 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
 306                 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
 307                 struct omap_sham_hmac_ctx *bctx = tctx->base;
 308                 u32 *opad = (u32 *)bctx->opad;
 309
 310                 for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) {
 311                         if (out)
 312                                 opad[i] = omap_sham_read(dd,
 313                                                 SHA_REG_ODIGEST(dd, i));
 314                         else
 315                                 omap_sham_write(dd, SHA_REG_ODIGEST(dd, i),
 316                                                 opad[i]);
 317                 }
 318         }
 319
 320         omap_sham_copy_hash_omap2(req, out);
 321 }
 322
 323 static void omap_sham_copy_ready_hash(struct ahash_request *req)
 324 {
 325         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 326         u32 *in = (u32 *)ctx->digest;
 327         u32 *hash = (u32 *)req->result;
 328         int i, d, big_endian = 0;
 329
 330         if (!hash)
 331                 return;
 332
 333         switch (ctx->flags & FLAGS_MODE_MASK) {
 334         case FLAGS_MODE_MD5:
 335                 d = MD5_DIGEST_SIZE / sizeof(u32);
 336                 break;
 337         case FLAGS_MODE_SHA1:
 338                 /* OMAP2 SHA1 is big endian */
 339                 if (test_bit(FLAGS_BE32_SHA1, &ctx->dd->flags))
 340                         big_endian = 1;
 341                 d = SHA1_DIGEST_SIZE / sizeof(u32);
 342                 break;
 343         case FLAGS_MODE_SHA224:
 344                 d = SHA224_DIGEST_SIZE / sizeof(u32);
 345                 break;
 346         case FLAGS_MODE_SHA256:
 347                 d = SHA256_DIGEST_SIZE / sizeof(u32);
 348                 break;
 349         case FLAGS_MODE_SHA384:
 350                 d = SHA384_DIGEST_SIZE / sizeof(u32);
 351                 break;
 352         case FLAGS_MODE_SHA512:
 353                 d = SHA512_DIGEST_SIZE / sizeof(u32);
 354                 break;
 355         default:
 356                 d = 0;
 357         }
 358
 359         if (big_endian)
 360                 for (i = 0; i < d; i++)
 361                         hash[i] = be32_to_cpu(in[i]);
 362         else
 363                 for (i = 0; i < d; i++)
 364                         hash[i] = le32_to_cpu(in[i]);
 365 }
 366
 367 static int omap_sham_hw_init(struct omap_sham_dev *dd)
 368 {
 369         int err;
 370
 371         err = pm_runtime_get_sync(dd->dev);
 372         if (err < 0) {
 373                 dev_err(dd->dev, "failed to get sync: %d\n", err);
 374                 return err;
 375         }
 376
 377         if (!test_bit(FLAGS_INIT, &dd->flags)) {
 378                 set_bit(FLAGS_INIT, &dd->flags);
 379                 dd->err = 0;
 380         }
 381
 382         return 0;
 383 }
 384
 385 static void omap_sham_write_ctrl_omap2(struct omap_sham_dev *dd, size_t length,
 386                                  int final, int dma)
 387 {
 388         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 389         u32 val = length << 5, mask;
 390
 391         if (likely(ctx->digcnt))
 392                 omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt);
 393
 394         omap_sham_write_mask(dd, SHA_REG_MASK(dd),
 395                 SHA_REG_MASK_IT_EN | (dma ? SHA_REG_MASK_DMA_EN : 0),
 396                 SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
 397         /*
 398          * Setting ALGO_CONST only for the first iteration
 399          * and CLOSE_HASH only for the last one.
 400          */
 401         if ((ctx->flags & FLAGS_MODE_MASK) == FLAGS_MODE_SHA1)
 402                 val |= SHA_REG_CTRL_ALGO;
 403         if (!ctx->digcnt)
 404                 val |= SHA_REG_CTRL_ALGO_CONST;
 405         if (final)
 406                 val |= SHA_REG_CTRL_CLOSE_HASH;
 407
 408         mask = SHA_REG_CTRL_ALGO_CONST | SHA_REG_CTRL_CLOSE_HASH |
 409                         SHA_REG_CTRL_ALGO | SHA_REG_CTRL_LENGTH;
 410
 411         omap_sham_write_mask(dd, SHA_REG_CTRL, val, mask);
 412 }
 413
 414 static void omap_sham_trigger_omap2(struct omap_sham_dev *dd, size_t length)
 415 {
 416 }
 417
 418 static int omap_sham_poll_irq_omap2(struct omap_sham_dev *dd)
 419 {
 420         return omap_sham_wait(dd, SHA_REG_CTRL, SHA_REG_CTRL_INPUT_READY);
 421 }
 422
 423 static int get_block_size(struct omap_sham_reqctx *ctx)
 424 {
 425         int d;
 426
 427         switch (ctx->flags & FLAGS_MODE_MASK) {
 428         case FLAGS_MODE_MD5:
 429         case FLAGS_MODE_SHA1:
 430                 d = SHA1_BLOCK_SIZE;
 431                 break;
 432         case FLAGS_MODE_SHA224:
 433         case FLAGS_MODE_SHA256:
 434                 d = SHA256_BLOCK_SIZE;
 435                 break;
 436         case FLAGS_MODE_SHA384:
 437         case FLAGS_MODE_SHA512:
 438                 d = SHA512_BLOCK_SIZE;
 439                 break;
 440         default:
 441                 d = 0;
 442         }
 443
 444         return d;
 445 }
 446
 447 static void omap_sham_write_n(struct omap_sham_dev *dd, u32 offset,
 448                                     u32 *value, int count)
 449 {
 450         for (; count--; value++, offset += 4)
 451                 omap_sham_write(dd, offset, *value);
 452 }
 453
 454 static void omap_sham_write_ctrl_omap4(struct omap_sham_dev *dd, size_t length,
 455                                  int final, int dma)
 456 {
 457         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 458         u32 val, mask;
 459
 460         /*
 461          * Setting ALGO_CONST only for the first iteration and
 462          * CLOSE_HASH only for the last one. Note that flags mode bits
 463          * correspond to algorithm encoding in mode register.
 464          */
 465         val = (ctx->flags & FLAGS_MODE_MASK) >> (FLAGS_MODE_SHIFT);
 466         if (!ctx->digcnt) {
 467                 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
 468                 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
 469                 struct omap_sham_hmac_ctx *bctx = tctx->base;
 470                 int bs, nr_dr;
 471
 472                 val |= SHA_REG_MODE_ALGO_CONSTANT;
 473
 474                 if (ctx->flags & BIT(FLAGS_HMAC)) {
 475                         bs = get_block_size(ctx);
 476                         nr_dr = bs / (2 * sizeof(u32));
 477                         val |= SHA_REG_MODE_HMAC_KEY_PROC;
 478                         omap_sham_write_n(dd, SHA_REG_ODIGEST(dd, 0),
 479                                           (u32 *)bctx->ipad, nr_dr);
 480                         omap_sham_write_n(dd, SHA_REG_IDIGEST(dd, 0),
 481                                           (u32 *)bctx->ipad + nr_dr, nr_dr);
 482                         ctx->digcnt += bs;
 483                 }
 484         }
 485
 486         if (final) {
 487                 val |= SHA_REG_MODE_CLOSE_HASH;
 488
 489                 if (ctx->flags & BIT(FLAGS_HMAC))
 490                         val |= SHA_REG_MODE_HMAC_OUTER_HASH;
 491         }
 492
 493         mask = SHA_REG_MODE_ALGO_CONSTANT | SHA_REG_MODE_CLOSE_HASH |
 494                SHA_REG_MODE_ALGO_MASK | SHA_REG_MODE_HMAC_OUTER_HASH |
 495                SHA_REG_MODE_HMAC_KEY_PROC;
 496
 497         dev_dbg(dd->dev, "ctrl: %08x, flags: %08lx\n", val, ctx->flags);
 498         omap_sham_write_mask(dd, SHA_REG_MODE(dd), val, mask);
 499         omap_sham_write(dd, SHA_REG_IRQENA, SHA_REG_IRQENA_OUTPUT_RDY);
 500         omap_sham_write_mask(dd, SHA_REG_MASK(dd),
 501                              SHA_REG_MASK_IT_EN |
 502                                      (dma ? SHA_REG_MASK_DMA_EN : 0),
 503                              SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
 504 }
 505
 506 static void omap_sham_trigger_omap4(struct omap_sham_dev *dd, size_t length)
 507 {
 508         omap_sham_write(dd, SHA_REG_LENGTH(dd), length);
 509 }
 510
 511 static int omap_sham_poll_irq_omap4(struct omap_sham_dev *dd)
 512 {
 513         return omap_sham_wait(dd, SHA_REG_IRQSTATUS,
 514                               SHA_REG_IRQSTATUS_INPUT_RDY);
 515 }
 516
 517 static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, size_t length,
 518                               int final)
 519 {
 520         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 521         int count, len32, bs32, offset = 0;
 522         const u32 *buffer;
 523         int mlen;
 524         struct sg_mapping_iter mi;
 525
 526         dev_dbg(dd->dev, "xmit_cpu: digcnt: %d, length: %d, final: %d\n",
 527                                                 ctx->digcnt, length, final);
 528
 529         dd->pdata->write_ctrl(dd, length, final, 0);
 530         dd->pdata->trigger(dd, length);
 531
 532         /* should be non-zero before next lines to disable clocks later */
 533         ctx->digcnt += length;
 534         ctx->total -= length;
 535
 536         if (final)
 537                 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
 538
 539         set_bit(FLAGS_CPU, &dd->flags);
 540
 541         len32 = DIV_ROUND_UP(length, sizeof(u32));
 542         bs32 = get_block_size(ctx) / sizeof(u32);
 543
 544         sg_miter_start(&mi, ctx->sg, ctx->sg_len,
 545                        SG_MITER_FROM_SG | SG_MITER_ATOMIC);
 546
 547         mlen = 0;
 548
 549         while (len32) {
 550                 if (dd->pdata->poll_irq(dd))
 551                         return -ETIMEDOUT;
 552
 553                 for (count = 0; count < min(len32, bs32); count++, offset++) {
 554                         if (!mlen) {
 555                                 sg_miter_next(&mi);
 556                                 mlen = mi.length;
 557                                 if (!mlen) {
 558                                         pr_err("sg miter failure.\n");
 559                                         return -EINVAL;
 560                                 }
 561                                 offset = 0;
 562                                 buffer = mi.addr;
 563                         }
 564                         omap_sham_write(dd, SHA_REG_DIN(dd, count),
 565                                         buffer[offset]);
 566                         mlen -= 4;
 567                 }
 568                 len32 -= min(len32, bs32);
 569         }
 570
 571         sg_miter_stop(&mi);
 572
 573         return -EINPROGRESS;
 574 }
 575
 576 static void omap_sham_dma_callback(void *param)
 577 {
 578         struct omap_sham_dev *dd = param;
 579
 580         set_bit(FLAGS_DMA_READY, &dd->flags);
 581         tasklet_schedule(&dd->done_task);
 582 }
 583
 584 static int omap_sham_xmit_dma(struct omap_sham_dev *dd, size_t length,
 585                               int final)
 586 {
 587         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 588         struct dma_async_tx_descriptor *tx;
 589         struct dma_slave_config cfg;
 590         int ret;
 591
 592         dev_dbg(dd->dev, "xmit_dma: digcnt: %d, length: %d, final: %d\n",
 593                                                 ctx->digcnt, length, final);
 594
 595         if (!dma_map_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE)) {
 596                 dev_err(dd->dev, "dma_map_sg error\n");
 597                 return -EINVAL;
 598         }
 599
 600         memset(&cfg, 0, sizeof(cfg));
 601
 602         cfg.dst_addr = dd->phys_base + SHA_REG_DIN(dd, 0);
 603         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 604         cfg.dst_maxburst = get_block_size(ctx) / DMA_SLAVE_BUSWIDTH_4_BYTES;
 605
 606         ret = dmaengine_slave_config(dd->dma_lch, &cfg);
 607         if (ret) {
 608                 pr_err("omap-sham: can't configure dmaengine slave: %d\n", ret);
 609                 return ret;
 610         }
 611
 612         tx = dmaengine_prep_slave_sg(dd->dma_lch, ctx->sg, ctx->sg_len,
 613                                      DMA_MEM_TO_DEV,
 614                                      DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 615
 616         if (!tx) {
 617                 dev_err(dd->dev, "prep_slave_sg failed\n");
 618                 return -EINVAL;
 619         }
 620
 621         tx->callback = omap_sham_dma_callback;
 622         tx->callback_param = dd;
 623
 624         dd->pdata->write_ctrl(dd, length, final, 1);
 625
 626         ctx->digcnt += length;
 627         ctx->total -= length;
 628
 629         if (final)
 630                 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
 631
 632         set_bit(FLAGS_DMA_ACTIVE, &dd->flags);
 633
 634         dmaengine_submit(tx);
 635         dma_async_issue_pending(dd->dma_lch);
 636
 637         dd->pdata->trigger(dd, length);
 638
 639         return -EINPROGRESS;
 640 }
 641
 642 static int omap_sham_copy_sg_lists(struct omap_sham_reqctx *ctx,
 643                                    struct scatterlist *sg, int bs, int new_len)
 644 {
 645         int n = sg_nents(sg);
 646         struct scatterlist *tmp;
 647         int offset = ctx->offset;
 648
 649         if (ctx->bufcnt)
 650                 n++;
 651
 652         ctx->sg = kmalloc_array(n, sizeof(*sg), GFP_KERNEL);
 653         if (!ctx->sg)
 654                 return -ENOMEM;
 655
 656         sg_init_table(ctx->sg, n);
 657
 658         tmp = ctx->sg;
 659
 660         ctx->sg_len = 0;
 661
 662         if (ctx->bufcnt) {
 663                 sg_set_buf(tmp, ctx->dd->xmit_buf, ctx->bufcnt);
 664                 tmp = sg_next(tmp);
 665                 ctx->sg_len++;
 666         }
 667
 668         while (sg && new_len) {
 669                 int len = sg->length - offset;
 670
 671                 if (offset) {
 672                         offset -= sg->length;
 673                         if (offset < 0)
 674                                 offset = 0;
 675                 }
 676
 677                 if (new_len < len)
 678                         len = new_len;
 679
 680                 if (len > 0) {
 681                         new_len -= len;
 682                         sg_set_page(tmp, sg_page(sg), len, sg->offset);
 683                         if (new_len <= 0)
 684                                 sg_mark_end(tmp);
 685                         tmp = sg_next(tmp);
 686                         ctx->sg_len++;
 687                 }
 688
 689                 sg = sg_next(sg);
 690         }
 691
 692         set_bit(FLAGS_SGS_ALLOCED, &ctx->dd->flags);
 693
 694         ctx->bufcnt = 0;
 695
 696         return 0;
 697 }
 698
 699 static int omap_sham_copy_sgs(struct omap_sham_reqctx *ctx,
 700                               struct scatterlist *sg, int bs, int new_len)
 701 {
 702         int pages;
 703         void *buf;
 704         int len;
 705
 706         len = new_len + ctx->bufcnt;
 707
 708         pages = get_order(ctx->total);
 709
 710         buf = (void *)__get_free_pages(GFP_ATOMIC, pages);
 711         if (!buf) {
 712                 pr_err("Couldn't allocate pages for unaligned cases.\n");
 713                 return -ENOMEM;
 714         }
 715
 716         if (ctx->bufcnt)
 717                 memcpy(buf, ctx->dd->xmit_buf, ctx->bufcnt);
 718
 719         scatterwalk_map_and_copy(buf + ctx->bufcnt, sg, ctx->offset,
 720                                  ctx->total - ctx->bufcnt, 0);
 721         sg_init_table(ctx->sgl, 1);
 722         sg_set_buf(ctx->sgl, buf, len);
 723         ctx->sg = ctx->sgl;
 724         set_bit(FLAGS_SGS_COPIED, &ctx->dd->flags);
 725         ctx->sg_len = 1;
 726         ctx->bufcnt = 0;
 727         ctx->offset = 0;
 728
 729         return 0;
 730 }
 731
 732 static int omap_sham_align_sgs(struct scatterlist *sg,
 733                                int nbytes, int bs, bool final,
 734                                struct omap_sham_reqctx *rctx)
 735 {
 736         int n = 0;
 737         bool aligned = true;
 738         bool list_ok = true;
 739         struct scatterlist *sg_tmp = sg;
 740         int new_len;
 741         int offset = rctx->offset;
 742
 743         if (!sg || !sg->length || !nbytes)
 744                 return 0;
 745
 746         new_len = nbytes;
 747
 748         if (offset)
 749                 list_ok = false;
 750
 751         if (final)
 752                 new_len = DIV_ROUND_UP(new_len, bs) * bs;
 753         else
 754                 new_len = (new_len - 1) / bs * bs;
 755
 756         if (nbytes != new_len)
 757                 list_ok = false;
 758
 759         while (nbytes > 0 && sg_tmp) {
 760                 n++;
 761
 762                 if (offset < sg_tmp->length) {
 763                         if (!IS_ALIGNED(offset + sg_tmp->offset, 4)) {
 764                                 aligned = false;
 765                                 break;
 766                         }
 767
 768                         if (!IS_ALIGNED(sg_tmp->length - offset, bs)) {
 769                                 aligned = false;
 770                                 break;
 771                         }
 772                 }
 773
 774                 if (offset) {
 775                         offset -= sg_tmp->length;
 776                         if (offset < 0) {
 777                                 nbytes += offset;
 778                                 offset = 0;
 779                         }
 780                 } else {
 781                         nbytes -= sg_tmp->length;
 782                 }
 783
 784                 sg_tmp = sg_next(sg_tmp);
 785
 786                 if (nbytes < 0) {
 787                         list_ok = false;
 788                         break;
 789                 }
 790         }
 791
 792         if (!aligned)
 793                 return omap_sham_copy_sgs(rctx, sg, bs, new_len);
 794         else if (!list_ok)
 795                 return omap_sham_copy_sg_lists(rctx, sg, bs, new_len);
 796
 797         rctx->sg_len = n;
 798         rctx->sg = sg;
 799
 800         return 0;
 801 }
 802
 803 static int omap_sham_prepare_request(struct ahash_request *req, bool update)
 804 {
 805         struct omap_sham_reqctx *rctx = ahash_request_ctx(req);
 806         int bs;
 807         int ret;
 808         int nbytes;
 809         bool final = rctx->flags & BIT(FLAGS_FINUP);
 810         int xmit_len, hash_later;
 811
 812         if (!req)
 813                 return 0;
 814
 815         bs = get_block_size(rctx);
 816
 817         if (update)
 818                 nbytes = req->nbytes;
 819         else
 820                 nbytes = 0;
 821
 822         rctx->total = nbytes + rctx->bufcnt;
 823
 824         if (!rctx->total)
 825                 return 0;
 826
 827         if (nbytes && (!IS_ALIGNED(rctx->bufcnt, bs))) {
 828                 int len = bs - rctx->bufcnt % bs;
 829
 830                 if (len > nbytes)
 831                         len = nbytes;
 832                 scatterwalk_map_and_copy(rctx->buffer + rctx->bufcnt, req->src,
 833                                          0, len, 0);
 834                 rctx->bufcnt += len;
 835                 nbytes -= len;
 836                 rctx->offset = len;
 837         }
 838
 839         if (rctx->bufcnt)
 840                 memcpy(rctx->dd->xmit_buf, rctx->buffer, rctx->bufcnt);
 841
 842         ret = omap_sham_align_sgs(req->src, nbytes, bs, final, rctx);
 843         if (ret)
 844                 return ret;
 845
 846         xmit_len = rctx->total;
 847
 848         if (!IS_ALIGNED(xmit_len, bs)) {
 849                 if (final)
 850                         xmit_len = DIV_ROUND_UP(xmit_len, bs) * bs;
 851                 else
 852                         xmit_len = xmit_len / bs * bs;
 853         } else if (!final) {
 854                 xmit_len -= bs;
 855         }
 856
 857         hash_later = rctx->total - xmit_len;
 858         if (hash_later < 0)
 859                 hash_later = 0;
 860
 861         if (rctx->bufcnt && nbytes) {
 862                 /* have data from previous operation and current */
 863                 sg_init_table(rctx->sgl, 2);
 864                 sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, rctx->bufcnt);
 865
 866                 sg_chain(rctx->sgl, 2, req->src);
 867
 868                 rctx->sg = rctx->sgl;
 869
 870                 rctx->sg_len++;
 871         } else if (rctx->bufcnt) {
 872                 /* have buffered data only */
 873                 sg_init_table(rctx->sgl, 1);
 874                 sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, xmit_len);
 875
 876                 rctx->sg = rctx->sgl;
 877
 878                 rctx->sg_len = 1;
 879         }
 880
 881         if (hash_later) {
 882                 int offset = 0;
 883
 884                 if (hash_later > req->nbytes) {
 885                         memcpy(rctx->buffer, rctx->buffer + xmit_len,
 886                                hash_later - req->nbytes);
 887                         offset = hash_later - req->nbytes;
 888                 }
 889
 890                 if (req->nbytes) {
 891                         scatterwalk_map_and_copy(rctx->buffer + offset,
 892                                                  req->src,
 893                                                  offset + req->nbytes -
 894                                                  hash_later, hash_later, 0);
 895                 }
 896
 897                 rctx->bufcnt = hash_later;
 898         } else {
 899                 rctx->bufcnt = 0;
 900         }
 901
 902         if (!final)
 903                 rctx->total = xmit_len;
 904
 905         return 0;
 906 }
 907
 908 static int omap_sham_update_dma_stop(struct omap_sham_dev *dd)
 909 {
 910         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 911
 912         dma_unmap_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE);
 913
 914         clear_bit(FLAGS_DMA_ACTIVE, &dd->flags);
 915
 916         return 0;
 917 }
 918
 919 static int omap_sham_init(struct ahash_request *req)
 920 {
 921         struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
 922         struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
 923         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 924         struct omap_sham_dev *dd = NULL, *tmp;
 925         int bs = 0;
 926
 927         spin_lock_bh(&sham.lock);
 928         if (!tctx->dd) {
 929                 list_for_each_entry(tmp, &sham.dev_list, list) {
 930                         dd = tmp;
 931                         break;
 932                 }
 933                 tctx->dd = dd;
 934         } else {
 935                 dd = tctx->dd;
 936         }
 937         spin_unlock_bh(&sham.lock);
 938
 939         ctx->dd = dd;
 940
 941         ctx->flags = 0;
 942
 943         dev_dbg(dd->dev, "init: digest size: %d\n",
 944                 crypto_ahash_digestsize(tfm));
 945
 946         switch (crypto_ahash_digestsize(tfm)) {
 947         case MD5_DIGEST_SIZE:
 948                 ctx->flags |= FLAGS_MODE_MD5;
 949                 bs = SHA1_BLOCK_SIZE;
 950                 break;
 951         case SHA1_DIGEST_SIZE:
 952                 ctx->flags |= FLAGS_MODE_SHA1;
 953                 bs = SHA1_BLOCK_SIZE;
 954                 break;
 955         case SHA224_DIGEST_SIZE:
 956                 ctx->flags |= FLAGS_MODE_SHA224;
 957                 bs = SHA224_BLOCK_SIZE;
 958                 break;
 959         case SHA256_DIGEST_SIZE:
 960                 ctx->flags |= FLAGS_MODE_SHA256;
 961                 bs = SHA256_BLOCK_SIZE;
 962                 break;
 963         case SHA384_DIGEST_SIZE:
 964                 ctx->flags |= FLAGS_MODE_SHA384;
 965                 bs = SHA384_BLOCK_SIZE;
 966                 break;
 967         case SHA512_DIGEST_SIZE:
 968                 ctx->flags |= FLAGS_MODE_SHA512;
 969                 bs = SHA512_BLOCK_SIZE;
 970                 break;
 971         }
 972
 973         ctx->bufcnt = 0;
 974         ctx->digcnt = 0;
 975         ctx->total = 0;
 976         ctx->offset = 0;
 977         ctx->buflen = BUFLEN;
 978
 979         if (tctx->flags & BIT(FLAGS_HMAC)) {
 980                 if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) {
 981                         struct omap_sham_hmac_ctx *bctx = tctx->base;
 982
 983                         memcpy(ctx->buffer, bctx->ipad, bs);
 984                         ctx->bufcnt = bs;
 985                 }
 986
 987                 ctx->flags |= BIT(FLAGS_HMAC);
 988         }
 989
 990         return 0;
 991
 992 }
 993
 994 static int omap_sham_update_req(struct omap_sham_dev *dd)
 995 {
 996         struct ahash_request *req = dd->req;
 997         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 998         int err;
 999         bool final = ctx->flags & BIT(FLAGS_FINUP);
1000
1001         dev_dbg(dd->dev, "update_req: total: %u, digcnt: %d, finup: %d\n",
1002                  ctx->total, ctx->digcnt, (ctx->flags & BIT(FLAGS_FINUP)) != 0);
1003
1004         if (ctx->total < get_block_size(ctx) ||
1005             ctx->total < OMAP_SHA_DMA_THRESHOLD)
1006                 ctx->flags |= BIT(FLAGS_CPU);
1007
1008         if (ctx->flags & BIT(FLAGS_CPU))
1009                 err = omap_sham_xmit_cpu(dd, ctx->total, final);
1010         else
1011                 err = omap_sham_xmit_dma(dd, ctx->total, final);
1012
1013         /* wait for dma completion before can take more data */
1014         dev_dbg(dd->dev, "update: err: %d, digcnt: %d\n", err, ctx->digcnt);
1015
1016         return err;
1017 }
1018
1019 static int omap_sham_final_req(struct omap_sham_dev *dd)
1020 {
1021         struct ahash_request *req = dd->req;
1022         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1023         int err = 0, use_dma = 1;
1024
1025         if ((ctx->total <= get_block_size(ctx)) || dd->polling_mode)
1026                 /*
1027                  * faster to handle last block with cpu or
1028                  * use cpu when dma is not present.
1029                  */
1030                 use_dma = 0;
1031
1032         if (use_dma)
1033                 err = omap_sham_xmit_dma(dd, ctx->total, 1);
1034         else
1035                 err = omap_sham_xmit_cpu(dd, ctx->total, 1);
1036
1037         ctx->bufcnt = 0;
1038
1039         dev_dbg(dd->dev, "final_req: err: %d\n", err);
1040
1041         return err;
1042 }
1043
1044 static int omap_sham_finish_hmac(struct ahash_request *req)
1045 {
1046         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1047         struct omap_sham_hmac_ctx *bctx = tctx->base;
1048         int bs = crypto_shash_blocksize(bctx->shash);
1049         int ds = crypto_shash_digestsize(bctx->shash);
1050         SHASH_DESC_ON_STACK(shash, bctx->shash);
1051
1052         shash->tfm = bctx->shash;
1053         shash->flags = 0; /* not CRYPTO_TFM_REQ_MAY_SLEEP */
1054
1055         return crypto_shash_init(shash) ?:
1056                crypto_shash_update(shash, bctx->opad, bs) ?:
1057                crypto_shash_finup(shash, req->result, ds, req->result);
1058 }
1059
1060 static int omap_sham_finish(struct ahash_request *req)
1061 {
1062         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1063         struct omap_sham_dev *dd = ctx->dd;
1064         int err = 0;
1065
1066         if (ctx->digcnt) {
1067                 omap_sham_copy_ready_hash(req);
1068                 if ((ctx->flags & BIT(FLAGS_HMAC)) &&
1069                                 !test_bit(FLAGS_AUTO_XOR, &dd->flags))
1070                         err = omap_sham_finish_hmac(req);
1071         }
1072
1073         dev_dbg(dd->dev, "digcnt: %d, bufcnt: %d\n", ctx->digcnt, ctx->bufcnt);
1074
1075         return err;
1076 }
1077
1078 static void omap_sham_finish_req(struct ahash_request *req, int err)
1079 {
1080         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1081         struct omap_sham_dev *dd = ctx->dd;
1082
1083         if (test_bit(FLAGS_SGS_COPIED, &dd->flags))
1084                 free_pages((unsigned long)sg_virt(ctx->sg),
1085                            get_order(ctx->sg->length));
1086
1087         if (test_bit(FLAGS_SGS_ALLOCED, &dd->flags))
1088                 kfree(ctx->sg);
1089
1090         ctx->sg = NULL;
1091
1092         dd->flags &= ~(BIT(FLAGS_SGS_ALLOCED) | BIT(FLAGS_SGS_COPIED));
1093
1094         if (!err) {
1095                 dd->pdata->copy_hash(req, 1);
1096                 if (test_bit(FLAGS_FINAL, &dd->flags))
1097                         err = omap_sham_finish(req);
1098         } else {
1099                 ctx->flags |= BIT(FLAGS_ERROR);
1100         }
1101
1102         /* atomic operation is not needed here */
1103         dd->flags &= ~(BIT(FLAGS_BUSY) | BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) |
1104                         BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY));
1105
1106         pm_runtime_mark_last_busy(dd->dev);
1107         pm_runtime_put_autosuspend(dd->dev);
1108
1109         if (req->base.complete)
1110                 req->base.complete(&req->base, err);
1111 }
1112
1113 static int omap_sham_handle_queue(struct omap_sham_dev *dd,
1114                                   struct ahash_request *req)
1115 {
1116         struct crypto_async_request *async_req, *backlog;
1117         struct omap_sham_reqctx *ctx;
1118         unsigned long flags;
1119         int err = 0, ret = 0;
1120
1121 retry:
1122         spin_lock_irqsave(&dd->lock, flags);
1123         if (req)
1124                 ret = ahash_enqueue_request(&dd->queue, req);
1125         if (test_bit(FLAGS_BUSY, &dd->flags)) {
1126                 spin_unlock_irqrestore(&dd->lock, flags);
1127                 return ret;
1128         }
1129         backlog = crypto_get_backlog(&dd->queue);
1130         async_req = crypto_dequeue_request(&dd->queue);
1131         if (async_req)
1132                 set_bit(FLAGS_BUSY, &dd->flags);
1133         spin_unlock_irqrestore(&dd->lock, flags);
1134
1135         if (!async_req)
1136                 return ret;
1137
1138         if (backlog)
1139                 backlog->complete(backlog, -EINPROGRESS);
1140
1141         req = ahash_request_cast(async_req);
1142         dd->req = req;
1143         ctx = ahash_request_ctx(req);
1144
1145         err = omap_sham_prepare_request(req, ctx->op == OP_UPDATE);
1146         if (err || !ctx->total)
1147                 goto err1;
1148
1149         dev_dbg(dd->dev, "handling new req, op: %lu, nbytes: %d\n",
1150                                                 ctx->op, req->nbytes);
1151
1152         err = omap_sham_hw_init(dd);
1153         if (err)
1154                 goto err1;
1155
1156         if (ctx->digcnt)
1157                 /* request has changed - restore hash */
1158                 dd->pdata->copy_hash(req, 0);
1159
1160         if (ctx->op == OP_UPDATE) {
1161                 err = omap_sham_update_req(dd);
1162                 if (err != -EINPROGRESS && (ctx->flags & BIT(FLAGS_FINUP)))
1163                         /* no final() after finup() */
1164                         err = omap_sham_final_req(dd);
1165         } else if (ctx->op == OP_FINAL) {
1166                 err = omap_sham_final_req(dd);
1167         }
1168 err1:
1169         dev_dbg(dd->dev, "exit, err: %d\n", err);
1170
1171         if (err != -EINPROGRESS) {
1172                 /* done_task will not finish it, so do it here */
1173                 omap_sham_finish_req(req, err);
1174                 req = NULL;
1175
1176                 /*
1177                  * Execute next request immediately if there is anything
1178                  * in queue.
1179                  */
1180                 goto retry;
1181         }
1182
1183         return ret;
1184 }
1185
1186 static int omap_sham_enqueue(struct ahash_request *req, unsigned int op)
1187 {
1188         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1189         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1190         struct omap_sham_dev *dd = tctx->dd;
1191
1192         ctx->op = op;
1193
1194         return omap_sham_handle_queue(dd, req);
1195 }
1196
1197 static int omap_sham_update(struct ahash_request *req)
1198 {
1199         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1200         struct omap_sham_dev *dd = ctx->dd;
1201
1202         if (!req->nbytes)
1203                 return 0;
1204
1205         if (ctx->bufcnt + req->nbytes <= ctx->buflen) {
1206                 scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src,
1207                                          0, req->nbytes, 0);
1208                 ctx->bufcnt += req->nbytes;
1209                 return 0;
1210         }
1211
1212         if (dd->polling_mode)
1213                 ctx->flags |= BIT(FLAGS_CPU);
1214
1215         return omap_sham_enqueue(req, OP_UPDATE);
1216 }
1217
1218 static int omap_sham_shash_digest(struct crypto_shash *tfm, u32 flags,
1219                                   const u8 *data, unsigned int len, u8 *out)
1220 {
1221         SHASH_DESC_ON_STACK(shash, tfm);
1222
1223         shash->tfm = tfm;
1224         shash->flags = flags & CRYPTO_TFM_REQ_MAY_SLEEP;
1225
1226         return crypto_shash_digest(shash, data, len, out);
1227 }
1228
1229 static int omap_sham_final_shash(struct ahash_request *req)
1230 {
1231         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1232         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1233         int offset = 0;
1234
1235         /*
1236          * If we are running HMAC on limited hardware support, skip
1237          * the ipad in the beginning of the buffer if we are going for
1238          * software fallback algorithm.
1239          */
1240         if (test_bit(FLAGS_HMAC, &ctx->flags) &&
1241             !test_bit(FLAGS_AUTO_XOR, &ctx->dd->flags))
1242                 offset = get_block_size(ctx);
1243
1244         return omap_sham_shash_digest(tctx->fallback, req->base.flags,
1245                                       ctx->buffer + offset,
1246                                       ctx->bufcnt - offset, req->result);
1247 }
1248
1249 static int omap_sham_final(struct ahash_request *req)
1250 {
1251         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1252
1253         ctx->flags |= BIT(FLAGS_FINUP);
1254
1255         if (ctx->flags & BIT(FLAGS_ERROR))
1256                 return 0; /* uncompleted hash is not needed */
1257
1258         /*
1259          * OMAP HW accel works only with buffers >= 9.
1260          * HMAC is always >= 9 because ipad == block size.
1261          * If buffersize is less than DMA_THRESHOLD, we use fallback
1262          * SW encoding, as using DMA + HW in this case doesn't provide
1263          * any benefit.
1264          */
1265         if (!ctx->digcnt && ctx->bufcnt < OMAP_SHA_DMA_THRESHOLD)
1266                 return omap_sham_final_shash(req);
1267         else if (ctx->bufcnt)
1268                 return omap_sham_enqueue(req, OP_FINAL);
1269
1270         /* copy ready hash (+ finalize hmac) */
1271         return omap_sham_finish(req);
1272 }
1273
1274 static int omap_sham_finup(struct ahash_request *req)
1275 {
1276         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1277         int err1, err2;
1278
1279         ctx->flags |= BIT(FLAGS_FINUP);
1280
1281         err1 = omap_sham_update(req);
1282         if (err1 == -EINPROGRESS || err1 == -EBUSY)
1283                 return err1;
1284         /*
1285          * final() has to be always called to cleanup resources
1286          * even if udpate() failed, except EINPROGRESS
1287          */
1288         err2 = omap_sham_final(req);
1289
1290         return err1 ?: err2;
1291 }
1292
1293 static int omap_sham_digest(struct ahash_request *req)
1294 {
1295         return omap_sham_init(req) ?: omap_sham_finup(req);
1296 }
1297
1298 static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key,
1299                       unsigned int keylen)
1300 {
1301         struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
1302         struct omap_sham_hmac_ctx *bctx = tctx->base;
1303         int bs = crypto_shash_blocksize(bctx->shash);
1304         int ds = crypto_shash_digestsize(bctx->shash);
1305         struct omap_sham_dev *dd = NULL, *tmp;
1306         int err, i;
1307
1308         spin_lock_bh(&sham.lock);
1309         if (!tctx->dd) {
1310                 list_for_each_entry(tmp, &sham.dev_list, list) {
1311                         dd = tmp;
1312                         break;
1313                 }
1314                 tctx->dd = dd;
1315         } else {
1316                 dd = tctx->dd;
1317         }
1318         spin_unlock_bh(&sham.lock);
1319
1320         err = crypto_shash_setkey(tctx->fallback, key, keylen);
1321         if (err)
1322                 return err;
1323
1324         if (keylen > bs) {
1325                 err = omap_sham_shash_digest(bctx->shash,
1326                                 crypto_shash_get_flags(bctx->shash),
1327                                 key, keylen, bctx->ipad);
1328                 if (err)
1329                         return err;
1330                 keylen = ds;
1331         } else {
1332                 memcpy(bctx->ipad, key, keylen);
1333         }
1334
1335         memset(bctx->ipad + keylen, 0, bs - keylen);
1336
1337         if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) {
1338                 memcpy(bctx->opad, bctx->ipad, bs);
1339
1340                 for (i = 0; i < bs; i++) {
1341                         bctx->ipad[i] ^= HMAC_IPAD_VALUE;
1342                         bctx->opad[i] ^= HMAC_OPAD_VALUE;
1343                 }
1344         }
1345
1346         return err;
1347 }
1348
1349 static int omap_sham_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base)
1350 {
1351         struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
1352         const char *alg_name = crypto_tfm_alg_name(tfm);
1353
1354         /* Allocate a fallback and abort if it failed. */
1355         tctx->fallback = crypto_alloc_shash(alg_name, 0,
1356                                             CRYPTO_ALG_NEED_FALLBACK);
1357         if (IS_ERR(tctx->fallback)) {
1358                 pr_err("omap-sham: fallback driver '%s' "
1359                                 "could not be loaded.\n", alg_name);
1360                 return PTR_ERR(tctx->fallback);
1361         }
1362
1363         crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
1364                                  sizeof(struct omap_sham_reqctx) + BUFLEN);
1365
1366         if (alg_base) {
1367                 struct omap_sham_hmac_ctx *bctx = tctx->base;
1368                 tctx->flags |= BIT(FLAGS_HMAC);
1369                 bctx->shash = crypto_alloc_shash(alg_base, 0,
1370                                                 CRYPTO_ALG_NEED_FALLBACK);
1371                 if (IS_ERR(bctx->shash)) {
1372                         pr_err("omap-sham: base driver '%s' "
1373                                         "could not be loaded.\n", alg_base);
1374                         crypto_free_shash(tctx->fallback);
1375                         return PTR_ERR(bctx->shash);
1376                 }
1377
1378         }
1379
1380         return 0;
1381 }
1382
1383 static int omap_sham_cra_init(struct crypto_tfm *tfm)
1384 {
1385         return omap_sham_cra_init_alg(tfm, NULL);
1386 }
1387
1388 static int omap_sham_cra_sha1_init(struct crypto_tfm *tfm)
1389 {
1390         return omap_sham_cra_init_alg(tfm, "sha1");
1391 }
1392
1393 static int omap_sham_cra_sha224_init(struct crypto_tfm *tfm)
1394 {
1395         return omap_sham_cra_init_alg(tfm, "sha224");
1396 }
1397
1398 static int omap_sham_cra_sha256_init(struct crypto_tfm *tfm)
1399 {
1400         return omap_sham_cra_init_alg(tfm, "sha256");
1401 }
1402
1403 static int omap_sham_cra_md5_init(struct crypto_tfm *tfm)
1404 {
1405         return omap_sham_cra_init_alg(tfm, "md5");
1406 }
1407
1408 static int omap_sham_cra_sha384_init(struct crypto_tfm *tfm)
1409 {
1410         return omap_sham_cra_init_alg(tfm, "sha384");
1411 }
1412
1413 static int omap_sham_cra_sha512_init(struct crypto_tfm *tfm)
1414 {
1415         return omap_sham_cra_init_alg(tfm, "sha512");
1416 }
1417
1418 static void omap_sham_cra_exit(struct crypto_tfm *tfm)
1419 {
1420         struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
1421
1422         crypto_free_shash(tctx->fallback);
1423         tctx->fallback = NULL;
1424
1425         if (tctx->flags & BIT(FLAGS_HMAC)) {
1426                 struct omap_sham_hmac_ctx *bctx = tctx->base;
1427                 crypto_free_shash(bctx->shash);
1428         }
1429 }
1430
1431 static int omap_sham_export(struct ahash_request *req, void *out)
1432 {
1433         struct omap_sham_reqctx *rctx = ahash_request_ctx(req);
1434
1435         memcpy(out, rctx, sizeof(*rctx) + rctx->bufcnt);
1436
1437         return 0;
1438 }
1439
1440 static int omap_sham_import(struct ahash_request *req, const void *in)
1441 {
1442         struct omap_sham_reqctx *rctx = ahash_request_ctx(req);
1443         const struct omap_sham_reqctx *ctx_in = in;
1444
1445         memcpy(rctx, in, sizeof(*rctx) + ctx_in->bufcnt);
1446
1447         return 0;
1448 }
1449
1450 static struct ahash_alg algs_sha1_md5[] = {
1451 {
1452         .init           = omap_sham_init,
1453         .update         = omap_sham_update,
1454         .final          = omap_sham_final,
1455         .finup          = omap_sham_finup,
1456         .digest         = omap_sham_digest,
1457         .halg.digestsize        = SHA1_DIGEST_SIZE,
1458         .halg.base      = {
1459                 .cra_name               = "sha1",
1460                 .cra_driver_name        = "omap-sha1",
1461                 .cra_priority           = 400,
1462                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1463                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1464                                                 CRYPTO_ALG_ASYNC |
1465                                                 CRYPTO_ALG_NEED_FALLBACK,
1466                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1467                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1468                 .cra_alignmask          = OMAP_ALIGN_MASK,
1469                 .cra_module             = THIS_MODULE,
1470                 .cra_init               = omap_sham_cra_init,
1471                 .cra_exit               = omap_sham_cra_exit,
1472         }
1473 },
1474 {
1475         .init           = omap_sham_init,
1476         .update         = omap_sham_update,
1477         .final          = omap_sham_final,
1478         .finup          = omap_sham_finup,
1479         .digest         = omap_sham_digest,
1480         .halg.digestsize        = MD5_DIGEST_SIZE,
1481         .halg.base      = {
1482                 .cra_name               = "md5",
1483                 .cra_driver_name        = "omap-md5",
1484                 .cra_priority           = 400,
1485                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1486                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1487                                                 CRYPTO_ALG_ASYNC |
1488                                                 CRYPTO_ALG_NEED_FALLBACK,
1489                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1490                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1491                 .cra_alignmask          = OMAP_ALIGN_MASK,
1492                 .cra_module             = THIS_MODULE,
1493                 .cra_init               = omap_sham_cra_init,
1494                 .cra_exit               = omap_sham_cra_exit,
1495         }
1496 },
1497 {
1498         .init           = omap_sham_init,
1499         .update         = omap_sham_update,
1500         .final          = omap_sham_final,
1501         .finup          = omap_sham_finup,
1502         .digest         = omap_sham_digest,
1503         .setkey         = omap_sham_setkey,
1504         .halg.digestsize        = SHA1_DIGEST_SIZE,
1505         .halg.base      = {
1506                 .cra_name               = "hmac(sha1)",
1507                 .cra_driver_name        = "omap-hmac-sha1",
1508                 .cra_priority           = 400,
1509                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1510                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1511                                                 CRYPTO_ALG_ASYNC |
1512                                                 CRYPTO_ALG_NEED_FALLBACK,
1513                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1514                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1515                                         sizeof(struct omap_sham_hmac_ctx),
1516                 .cra_alignmask          = OMAP_ALIGN_MASK,
1517                 .cra_module             = THIS_MODULE,
1518                 .cra_init               = omap_sham_cra_sha1_init,
1519                 .cra_exit               = omap_sham_cra_exit,
1520         }
1521 },
1522 {
1523         .init           = omap_sham_init,
1524         .update         = omap_sham_update,
1525         .final          = omap_sham_final,
1526         .finup          = omap_sham_finup,
1527         .digest         = omap_sham_digest,
1528         .setkey         = omap_sham_setkey,
1529         .halg.digestsize        = MD5_DIGEST_SIZE,
1530         .halg.base      = {
1531                 .cra_name               = "hmac(md5)",
1532                 .cra_driver_name        = "omap-hmac-md5",
1533                 .cra_priority           = 400,
1534                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1535                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1536                                                 CRYPTO_ALG_ASYNC |
1537                                                 CRYPTO_ALG_NEED_FALLBACK,
1538                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1539                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1540                                         sizeof(struct omap_sham_hmac_ctx),
1541                 .cra_alignmask          = OMAP_ALIGN_MASK,
1542                 .cra_module             = THIS_MODULE,
1543                 .cra_init               = omap_sham_cra_md5_init,
1544                 .cra_exit               = omap_sham_cra_exit,
1545         }
1546 }
1547 };
1548
1549 /* OMAP4 has some algs in addition to what OMAP2 has */
1550 static struct ahash_alg algs_sha224_sha256[] = {
1551 {
1552         .init           = omap_sham_init,
1553         .update         = omap_sham_update,
1554         .final          = omap_sham_final,
1555         .finup          = omap_sham_finup,
1556         .digest         = omap_sham_digest,
1557         .halg.digestsize        = SHA224_DIGEST_SIZE,
1558         .halg.base      = {
1559                 .cra_name               = "sha224",
1560                 .cra_driver_name        = "omap-sha224",
1561                 .cra_priority           = 400,
1562                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1563                                                 CRYPTO_ALG_ASYNC |
1564                                                 CRYPTO_ALG_NEED_FALLBACK,
1565                 .cra_blocksize          = SHA224_BLOCK_SIZE,
1566                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1567                 .cra_alignmask          = OMAP_ALIGN_MASK,
1568                 .cra_module             = THIS_MODULE,
1569                 .cra_init               = omap_sham_cra_init,
1570                 .cra_exit               = omap_sham_cra_exit,
1571         }
1572 },
1573 {
1574         .init           = omap_sham_init,
1575         .update         = omap_sham_update,
1576         .final          = omap_sham_final,
1577         .finup          = omap_sham_finup,
1578         .digest         = omap_sham_digest,
1579         .halg.digestsize        = SHA256_DIGEST_SIZE,
1580         .halg.base      = {
1581                 .cra_name               = "sha256",
1582                 .cra_driver_name        = "omap-sha256",
1583                 .cra_priority           = 400,
1584                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1585                                                 CRYPTO_ALG_ASYNC |
1586                                                 CRYPTO_ALG_NEED_FALLBACK,
1587                 .cra_blocksize          = SHA256_BLOCK_SIZE,
1588                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1589                 .cra_alignmask          = OMAP_ALIGN_MASK,
1590                 .cra_module             = THIS_MODULE,
1591                 .cra_init               = omap_sham_cra_init,
1592                 .cra_exit               = omap_sham_cra_exit,
1593         }
1594 },
1595 {
1596         .init           = omap_sham_init,
1597         .update         = omap_sham_update,
1598         .final          = omap_sham_final,
1599         .finup          = omap_sham_finup,
1600         .digest         = omap_sham_digest,
1601         .setkey         = omap_sham_setkey,
1602         .halg.digestsize        = SHA224_DIGEST_SIZE,
1603         .halg.base      = {
1604                 .cra_name               = "hmac(sha224)",
1605                 .cra_driver_name        = "omap-hmac-sha224",
1606                 .cra_priority           = 400,
1607                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1608                                                 CRYPTO_ALG_ASYNC |
1609                                                 CRYPTO_ALG_NEED_FALLBACK,
1610                 .cra_blocksize          = SHA224_BLOCK_SIZE,
1611                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1612                                         sizeof(struct omap_sham_hmac_ctx),
1613                 .cra_alignmask          = OMAP_ALIGN_MASK,
1614                 .cra_module             = THIS_MODULE,
1615                 .cra_init               = omap_sham_cra_sha224_init,
1616                 .cra_exit               = omap_sham_cra_exit,
1617         }
1618 },
1619 {
1620         .init           = omap_sham_init,
1621         .update         = omap_sham_update,
1622         .final          = omap_sham_final,
1623         .finup          = omap_sham_finup,
1624         .digest         = omap_sham_digest,
1625         .setkey         = omap_sham_setkey,
1626         .halg.digestsize        = SHA256_DIGEST_SIZE,
1627         .halg.base      = {
1628                 .cra_name               = "hmac(sha256)",
1629                 .cra_driver_name        = "omap-hmac-sha256",
1630                 .cra_priority           = 400,
1631                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1632                                                 CRYPTO_ALG_ASYNC |
1633                                                 CRYPTO_ALG_NEED_FALLBACK,
1634                 .cra_blocksize          = SHA256_BLOCK_SIZE,
1635                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1636                                         sizeof(struct omap_sham_hmac_ctx),
1637                 .cra_alignmask          = OMAP_ALIGN_MASK,
1638                 .cra_module             = THIS_MODULE,
1639                 .cra_init               = omap_sham_cra_sha256_init,
1640                 .cra_exit               = omap_sham_cra_exit,
1641         }
1642 },
1643 };
1644
1645 static struct ahash_alg algs_sha384_sha512[] = {
1646 {
1647         .init           = omap_sham_init,
1648         .update         = omap_sham_update,
1649         .final          = omap_sham_final,
1650         .finup          = omap_sham_finup,
1651         .digest         = omap_sham_digest,
1652         .halg.digestsize        = SHA384_DIGEST_SIZE,
1653         .halg.base      = {
1654                 .cra_name               = "sha384",
1655                 .cra_driver_name        = "omap-sha384",
1656                 .cra_priority           = 400,
1657                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1658                                                 CRYPTO_ALG_ASYNC |
1659                                                 CRYPTO_ALG_NEED_FALLBACK,
1660                 .cra_blocksize          = SHA384_BLOCK_SIZE,
1661                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1662                 .cra_alignmask          = OMAP_ALIGN_MASK,
1663                 .cra_module             = THIS_MODULE,
1664                 .cra_init               = omap_sham_cra_init,
1665                 .cra_exit               = omap_sham_cra_exit,
1666         }
1667 },
1668 {
1669         .init           = omap_sham_init,
1670         .update         = omap_sham_update,
1671         .final          = omap_sham_final,
1672         .finup          = omap_sham_finup,
1673         .digest         = omap_sham_digest,
1674         .halg.digestsize        = SHA512_DIGEST_SIZE,
1675         .halg.base      = {
1676                 .cra_name               = "sha512",
1677                 .cra_driver_name        = "omap-sha512",
1678                 .cra_priority           = 400,
1679                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1680                                                 CRYPTO_ALG_ASYNC |
1681                                                 CRYPTO_ALG_NEED_FALLBACK,
1682                 .cra_blocksize          = SHA512_BLOCK_SIZE,
1683                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1684                 .cra_alignmask          = OMAP_ALIGN_MASK,
1685                 .cra_module             = THIS_MODULE,
1686                 .cra_init               = omap_sham_cra_init,
1687                 .cra_exit               = omap_sham_cra_exit,
1688         }
1689 },
1690 {
1691         .init           = omap_sham_init,
1692         .update         = omap_sham_update,
1693         .final          = omap_sham_final,
1694         .finup          = omap_sham_finup,
1695         .digest         = omap_sham_digest,
1696         .setkey         = omap_sham_setkey,
1697         .halg.digestsize        = SHA384_DIGEST_SIZE,
1698         .halg.base      = {
1699                 .cra_name               = "hmac(sha384)",
1700                 .cra_driver_name        = "omap-hmac-sha384",
1701                 .cra_priority           = 400,
1702                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1703                                                 CRYPTO_ALG_ASYNC |
1704                                                 CRYPTO_ALG_NEED_FALLBACK,
1705                 .cra_blocksize          = SHA384_BLOCK_SIZE,
1706                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1707                                         sizeof(struct omap_sham_hmac_ctx),
1708                 .cra_alignmask          = OMAP_ALIGN_MASK,
1709                 .cra_module             = THIS_MODULE,
1710                 .cra_init               = omap_sham_cra_sha384_init,
1711                 .cra_exit               = omap_sham_cra_exit,
1712         }
1713 },
1714 {
1715         .init           = omap_sham_init,
1716         .update         = omap_sham_update,
1717         .final          = omap_sham_final,
1718         .finup          = omap_sham_finup,
1719         .digest         = omap_sham_digest,
1720         .setkey         = omap_sham_setkey,
1721         .halg.digestsize        = SHA512_DIGEST_SIZE,
1722         .halg.base      = {
1723                 .cra_name               = "hmac(sha512)",
1724                 .cra_driver_name        = "omap-hmac-sha512",
1725                 .cra_priority           = 400,
1726                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1727                                                 CRYPTO_ALG_ASYNC |
1728                                                 CRYPTO_ALG_NEED_FALLBACK,
1729                 .cra_blocksize          = SHA512_BLOCK_SIZE,
1730                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1731                                         sizeof(struct omap_sham_hmac_ctx),
1732                 .cra_alignmask          = OMAP_ALIGN_MASK,
1733                 .cra_module             = THIS_MODULE,
1734                 .cra_init               = omap_sham_cra_sha512_init,
1735                 .cra_exit               = omap_sham_cra_exit,
1736         }
1737 },
1738 };
1739
1740 static void omap_sham_done_task(unsigned long data)
1741 {
1742         struct omap_sham_dev *dd = (struct omap_sham_dev *)data;
1743         int err = 0;
1744
1745         if (!test_bit(FLAGS_BUSY, &dd->flags)) {
1746                 omap_sham_handle_queue(dd, NULL);
1747                 return;
1748         }
1749
1750         if (test_bit(FLAGS_CPU, &dd->flags)) {
1751                 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags))
1752                         goto finish;
1753         } else if (test_bit(FLAGS_DMA_READY, &dd->flags)) {
1754                 if (test_and_clear_bit(FLAGS_DMA_ACTIVE, &dd->flags)) {
1755                         omap_sham_update_dma_stop(dd);
1756                         if (dd->err) {
1757                                 err = dd->err;
1758                                 goto finish;
1759                         }
1760                 }
1761                 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) {
1762                         /* hash or semi-hash ready */
1763                         clear_bit(FLAGS_DMA_READY, &dd->flags);
1764                                 goto finish;
1765                 }
1766         }
1767
1768         return;
1769
1770 finish:
1771         dev_dbg(dd->dev, "update done: err: %d\n", err);
1772         /* finish curent request */
1773         omap_sham_finish_req(dd->req, err);
1774
1775         /* If we are not busy, process next req */
1776         if (!test_bit(FLAGS_BUSY, &dd->flags))
1777                 omap_sham_handle_queue(dd, NULL);
1778 }
1779
1780 static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd)
1781 {
1782         if (!test_bit(FLAGS_BUSY, &dd->flags)) {
1783                 dev_warn(dd->dev, "Interrupt when no active requests.\n");
1784         } else {
1785                 set_bit(FLAGS_OUTPUT_READY, &dd->flags);
1786                 tasklet_schedule(&dd->done_task);
1787         }
1788
1789         return IRQ_HANDLED;
1790 }
1791
1792 static irqreturn_t omap_sham_irq_omap2(int irq, void *dev_id)
1793 {
1794         struct omap_sham_dev *dd = dev_id;
1795
1796         if (unlikely(test_bit(FLAGS_FINAL, &dd->flags)))
1797                 /* final -> allow device to go to power-saving mode */
1798                 omap_sham_write_mask(dd, SHA_REG_CTRL, 0, SHA_REG_CTRL_LENGTH);
1799
1800         omap_sham_write_mask(dd, SHA_REG_CTRL, SHA_REG_CTRL_OUTPUT_READY,
1801                                  SHA_REG_CTRL_OUTPUT_READY);
1802         omap_sham_read(dd, SHA_REG_CTRL);
1803
1804         return omap_sham_irq_common(dd);
1805 }
1806
1807 static irqreturn_t omap_sham_irq_omap4(int irq, void *dev_id)
1808 {
1809         struct omap_sham_dev *dd = dev_id;
1810
1811         omap_sham_write_mask(dd, SHA_REG_MASK(dd), 0, SHA_REG_MASK_IT_EN);
1812
1813         return omap_sham_irq_common(dd);
1814 }
1815
1816 static struct omap_sham_algs_info omap_sham_algs_info_omap2[] = {
1817         {
1818                 .algs_list      = algs_sha1_md5,
1819                 .size           = ARRAY_SIZE(algs_sha1_md5),
1820         },
1821 };
1822
1823 static const struct omap_sham_pdata omap_sham_pdata_omap2 = {
1824         .algs_info      = omap_sham_algs_info_omap2,
1825         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap2),
1826         .flags          = BIT(FLAGS_BE32_SHA1),
1827         .digest_size    = SHA1_DIGEST_SIZE,
1828         .copy_hash      = omap_sham_copy_hash_omap2,
1829         .write_ctrl     = omap_sham_write_ctrl_omap2,
1830         .trigger        = omap_sham_trigger_omap2,
1831         .poll_irq       = omap_sham_poll_irq_omap2,
1832         .intr_hdlr      = omap_sham_irq_omap2,
1833         .idigest_ofs    = 0x00,
1834         .din_ofs        = 0x1c,
1835         .digcnt_ofs     = 0x14,
1836         .rev_ofs        = 0x5c,
1837         .mask_ofs       = 0x60,
1838         .sysstatus_ofs  = 0x64,
1839         .major_mask     = 0xf0,
1840         .major_shift    = 4,
1841         .minor_mask     = 0x0f,
1842         .minor_shift    = 0,
1843 };
1844
1845 #ifdef CONFIG_OF
1846 static struct omap_sham_algs_info omap_sham_algs_info_omap4[] = {
1847         {
1848                 .algs_list      = algs_sha1_md5,
1849                 .size           = ARRAY_SIZE(algs_sha1_md5),
1850         },
1851         {
1852                 .algs_list      = algs_sha224_sha256,
1853                 .size           = ARRAY_SIZE(algs_sha224_sha256),
1854         },
1855 };
1856
1857 static const struct omap_sham_pdata omap_sham_pdata_omap4 = {
1858         .algs_info      = omap_sham_algs_info_omap4,
1859         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap4),
1860         .flags          = BIT(FLAGS_AUTO_XOR),
1861         .digest_size    = SHA256_DIGEST_SIZE,
1862         .copy_hash      = omap_sham_copy_hash_omap4,
1863         .write_ctrl     = omap_sham_write_ctrl_omap4,
1864         .trigger        = omap_sham_trigger_omap4,
1865         .poll_irq       = omap_sham_poll_irq_omap4,
1866         .intr_hdlr      = omap_sham_irq_omap4,
1867         .idigest_ofs    = 0x020,
1868         .odigest_ofs    = 0x0,
1869         .din_ofs        = 0x080,
1870         .digcnt_ofs     = 0x040,
1871         .rev_ofs        = 0x100,
1872         .mask_ofs       = 0x110,
1873         .sysstatus_ofs  = 0x114,
1874         .mode_ofs       = 0x44,
1875         .length_ofs     = 0x48,
1876         .major_mask     = 0x0700,
1877         .major_shift    = 8,
1878         .minor_mask     = 0x003f,
1879         .minor_shift    = 0,
1880 };
1881
1882 static struct omap_sham_algs_info omap_sham_algs_info_omap5[] = {
1883         {
1884                 .algs_list      = algs_sha1_md5,
1885                 .size           = ARRAY_SIZE(algs_sha1_md5),
1886         },
1887         {
1888                 .algs_list      = algs_sha224_sha256,
1889                 .size           = ARRAY_SIZE(algs_sha224_sha256),
1890         },
1891         {
1892                 .algs_list      = algs_sha384_sha512,
1893                 .size           = ARRAY_SIZE(algs_sha384_sha512),
1894         },
1895 };
1896
1897 static const struct omap_sham_pdata omap_sham_pdata_omap5 = {
1898         .algs_info      = omap_sham_algs_info_omap5,
1899         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap5),
1900         .flags          = BIT(FLAGS_AUTO_XOR),
1901         .digest_size    = SHA512_DIGEST_SIZE,
1902         .copy_hash      = omap_sham_copy_hash_omap4,
1903         .write_ctrl     = omap_sham_write_ctrl_omap4,
1904         .trigger        = omap_sham_trigger_omap4,
1905         .poll_irq       = omap_sham_poll_irq_omap4,
1906         .intr_hdlr      = omap_sham_irq_omap4,
1907         .idigest_ofs    = 0x240,
1908         .odigest_ofs    = 0x200,
1909         .din_ofs        = 0x080,
1910         .digcnt_ofs     = 0x280,
1911         .rev_ofs        = 0x100,
1912         .mask_ofs       = 0x110,
1913         .sysstatus_ofs  = 0x114,
1914         .mode_ofs       = 0x284,
1915         .length_ofs     = 0x288,
1916         .major_mask     = 0x0700,
1917         .major_shift    = 8,
1918         .minor_mask     = 0x003f,
1919         .minor_shift    = 0,
1920 };
1921
1922 static const struct of_device_id omap_sham_of_match[] = {
1923         {
1924                 .compatible     = "ti,omap2-sham",
1925                 .data           = &omap_sham_pdata_omap2,
1926         },
1927         {
1928                 .compatible     = "ti,omap3-sham",
1929                 .data           = &omap_sham_pdata_omap2,
1930         },
1931         {
1932                 .compatible     = "ti,omap4-sham",
1933                 .data           = &omap_sham_pdata_omap4,
1934         },
1935         {
1936                 .compatible     = "ti,omap5-sham",
1937                 .data           = &omap_sham_pdata_omap5,
1938         },
1939         {},
1940 };
1941 MODULE_DEVICE_TABLE(of, omap_sham_of_match);
1942
1943 static int omap_sham_get_res_of(struct omap_sham_dev *dd,
1944                 struct device *dev, struct resource *res)
1945 {
1946         struct device_node *node = dev->of_node;
1947         int err = 0;
1948
1949         dd->pdata = of_device_get_match_data(dev);
1950         if (!dd->pdata) {
1951                 dev_err(dev, "no compatible OF match\n");
1952                 err = -EINVAL;
1953                 goto err;
1954         }
1955
1956         err = of_address_to_resource(node, 0, res);
1957         if (err < 0) {
1958                 dev_err(dev, "can't translate OF node address\n");
1959                 err = -EINVAL;
1960                 goto err;
1961         }
1962
1963         dd->irq = irq_of_parse_and_map(node, 0);
1964         if (!dd->irq) {
1965                 dev_err(dev, "can't translate OF irq value\n");
1966                 err = -EINVAL;
1967                 goto err;
1968         }
1969
1970 err:
1971         return err;
1972 }
1973 #else
1974 static const struct of_device_id omap_sham_of_match[] = {
1975         {},
1976 };
1977
1978 static int omap_sham_get_res_of(struct omap_sham_dev *dd,
1979                 struct device *dev, struct resource *res)
1980 {
1981         return -EINVAL;
1982 }
1983 #endif
1984
1985 static int omap_sham_get_res_pdev(struct omap_sham_dev *dd,
1986                 struct platform_device *pdev, struct resource *res)
1987 {
1988         struct device *dev = &pdev->dev;
1989         struct resource *r;
1990         int err = 0;
1991
1992         /* Get the base address */
1993         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1994         if (!r) {
1995                 dev_err(dev, "no MEM resource info\n");
1996                 err = -ENODEV;
1997                 goto err;
1998         }
1999         memcpy(res, r, sizeof(*res));
2000
2001         /* Get the IRQ */
2002         dd->irq = platform_get_irq(pdev, 0);
2003         if (dd->irq < 0) {
2004                 dev_err(dev, "no IRQ resource info\n");
2005                 err = dd->irq;
2006                 goto err;
2007         }
2008
2009         /* Only OMAP2/3 can be non-DT */
2010         dd->pdata = &omap_sham_pdata_omap2;
2011
2012 err:
2013         return err;
2014 }
2015
2016 static int omap_sham_probe(struct platform_device *pdev)
2017 {
2018         struct omap_sham_dev *dd;
2019         struct device *dev = &pdev->dev;
2020         struct resource res;
2021         dma_cap_mask_t mask;
2022         int err, i, j;
2023         u32 rev;
2024
2025         dd = devm_kzalloc(dev, sizeof(struct omap_sham_dev), GFP_KERNEL);
2026         if (dd == NULL) {
2027                 dev_err(dev, "unable to alloc data struct.\n");
2028                 err = -ENOMEM;
2029                 goto data_err;
2030         }
2031         dd->dev = dev;
2032         platform_set_drvdata(pdev, dd);
2033
2034         INIT_LIST_HEAD(&dd->list);
2035         spin_lock_init(&dd->lock);
2036         tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd);
2037         crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH);
2038
2039         err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) :
2040                                omap_sham_get_res_pdev(dd, pdev, &res);
2041         if (err)
2042                 goto data_err;
2043
2044         dd->io_base = devm_ioremap_resource(dev, &res);
2045         if (IS_ERR(dd->io_base)) {
2046                 err = PTR_ERR(dd->io_base);
2047                 goto data_err;
2048         }
2049         dd->phys_base = res.start;
2050
2051         err = devm_request_irq(dev, dd->irq, dd->pdata->intr_hdlr,
2052                                IRQF_TRIGGER_NONE, dev_name(dev), dd);
2053         if (err) {
2054                 dev_err(dev, "unable to request irq %d, err = %d\n",
2055                         dd->irq, err);
2056                 goto data_err;
2057         }
2058
2059         dma_cap_zero(mask);
2060         dma_cap_set(DMA_SLAVE, mask);
2061
2062         dd->dma_lch = dma_request_chan(dev, "rx");
2063         if (IS_ERR(dd->dma_lch)) {
2064                 err = PTR_ERR(dd->dma_lch);
2065                 if (err == -EPROBE_DEFER)
2066                         goto data_err;
2067
2068                 dd->polling_mode = 1;
2069                 dev_dbg(dev, "using polling mode instead of dma\n");
2070         }
2071
2072         dd->flags |= dd->pdata->flags;
2073
2074         pm_runtime_use_autosuspend(dev);
2075         pm_runtime_set_autosuspend_delay(dev, DEFAULT_AUTOSUSPEND_DELAY);
2076
2077         pm_runtime_enable(dev);
2078         pm_runtime_irq_safe(dev);
2079
2080         err = pm_runtime_get_sync(dev);
2081         if (err < 0) {
2082                 dev_err(dev, "failed to get sync: %d\n", err);
2083                 goto err_pm;
2084         }
2085
2086         rev = omap_sham_read(dd, SHA_REG_REV(dd));
2087         pm_runtime_put_sync(&pdev->dev);
2088
2089         dev_info(dev, "hw accel on OMAP rev %u.%u\n",
2090                 (rev & dd->pdata->major_mask) >> dd->pdata->major_shift,
2091                 (rev & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
2092
2093         spin_lock(&sham.lock);
2094         list_add_tail(&dd->list, &sham.dev_list);
2095         spin_unlock(&sham.lock);
2096
2097         for (i = 0; i < dd->pdata->algs_info_size; i++) {
2098                 for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
2099                         struct ahash_alg *alg;
2100
2101                         alg = &dd->pdata->algs_info[i].algs_list[j];
2102                         alg->export = omap_sham_export;
2103                         alg->import = omap_sham_import;
2104                         alg->halg.statesize = sizeof(struct omap_sham_reqctx) +
2105                                               BUFLEN;
2106                         err = crypto_register_ahash(alg);
2107                         if (err)
2108                                 goto err_algs;
2109
2110                         dd->pdata->algs_info[i].registered++;
2111                 }
2112         }
2113
2114         return 0;
2115
2116 err_algs:
2117         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
2118                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
2119                         crypto_unregister_ahash(
2120                                         &dd->pdata->algs_info[i].algs_list[j]);
2121 err_pm:
2122         pm_runtime_disable(dev);
2123         if (!dd->polling_mode)
2124                 dma_release_channel(dd->dma_lch);
2125 data_err:
2126         dev_err(dev, "initialization failed.\n");
2127
2128         return err;
2129 }
2130
2131 static int omap_sham_remove(struct platform_device *pdev)
2132 {
2133         struct omap_sham_dev *dd;
2134         int i, j;
2135
2136         dd = platform_get_drvdata(pdev);
2137         if (!dd)
2138                 return -ENODEV;
2139         spin_lock(&sham.lock);
2140         list_del(&dd->list);
2141         spin_unlock(&sham.lock);
2142         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
2143                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
2144                         crypto_unregister_ahash(
2145                                         &dd->pdata->algs_info[i].algs_list[j]);
2146         tasklet_kill(&dd->done_task);
2147         pm_runtime_disable(&pdev->dev);
2148
2149         if (!dd->polling_mode)
2150                 dma_release_channel(dd->dma_lch);
2151
2152         return 0;
2153 }
2154
2155 #ifdef CONFIG_PM_SLEEP
2156 static int omap_sham_suspend(struct device *dev)
2157 {
2158         pm_runtime_put_sync(dev);
2159         return 0;
2160 }
2161
2162 static int omap_sham_resume(struct device *dev)
2163 {
2164         int err = pm_runtime_get_sync(dev);
2165         if (err < 0) {
2166                 dev_err(dev, "failed to get sync: %d\n", err);
2167                 return err;
2168         }
2169         return 0;
2170 }
2171 #endif
2172
2173 static SIMPLE_DEV_PM_OPS(omap_sham_pm_ops, omap_sham_suspend, omap_sham_resume);
2174
2175 static struct platform_driver omap_sham_driver = {
2176         .probe  = omap_sham_probe,
2177         .remove = omap_sham_remove,
2178         .driver = {
2179                 .name   = "omap-sham",
2180                 .pm     = &omap_sham_pm_ops,
2181                 .of_match_table = omap_sham_of_match,
2182         },
2183 };
2184
2185 module_platform_driver(omap_sham_driver);
2186
2187 MODULE_DESCRIPTION("OMAP SHA1/MD5 hw acceleration support.");
2188 MODULE_LICENSE("GPL v2");
2189 MODULE_AUTHOR("Dmitry Kasatkin");
2190 MODULE_ALIAS("platform:omap-sham");