drivers/crypto/omap-sham.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Cryptographic API.
   4  *
   5  * Support for OMAP SHA1/MD5 HW acceleration.
   6  *
   7  * Copyright (c) 2010 Nokia Corporation
   8  * Author: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
   9  * Copyright (c) 2011 Texas Instruments Incorporated
  10  *
  11  * Some ideas are from old omap-sha1-md5.c driver.
  12  */
  13
  14 #define pr_fmt(fmt) "%s: " fmt, __func__
  15
  16 #include <linux/err.h>
  17 #include <linux/device.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/errno.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/kernel.h>
  23 #include <linux/irq.h>
  24 #include <linux/io.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/scatterlist.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/dmaengine.h>
  29 #include <linux/pm_runtime.h>
  30 #include <linux/of.h>
  31 #include <linux/of_device.h>
  32 #include <linux/of_address.h>
  33 #include <linux/of_irq.h>
  34 #include <linux/delay.h>
  35 #include <linux/crypto.h>
  36 #include <crypto/scatterwalk.h>
  37 #include <crypto/algapi.h>
  38 #include <crypto/sha1.h>
  39 #include <crypto/sha2.h>
  40 #include <crypto/hash.h>
  41 #include <crypto/hmac.h>
  42 #include <crypto/internal/hash.h>
  43 #include <crypto/engine.h>
  44
  45 #define MD5_DIGEST_SIZE                 16
  46
  47 #define SHA_REG_IDIGEST(dd, x)          ((dd)->pdata->idigest_ofs + ((x)*0x04))
  48 #define SHA_REG_DIN(dd, x)              ((dd)->pdata->din_ofs + ((x) * 0x04))
  49 #define SHA_REG_DIGCNT(dd)              ((dd)->pdata->digcnt_ofs)
  50
  51 #define SHA_REG_ODIGEST(dd, x)          ((dd)->pdata->odigest_ofs + (x * 0x04))
  52
  53 #define SHA_REG_CTRL                    0x18
  54 #define SHA_REG_CTRL_LENGTH             (0xFFFFFFFF << 5)
  55 #define SHA_REG_CTRL_CLOSE_HASH         (1 << 4)
  56 #define SHA_REG_CTRL_ALGO_CONST         (1 << 3)
  57 #define SHA_REG_CTRL_ALGO               (1 << 2)
  58 #define SHA_REG_CTRL_INPUT_READY        (1 << 1)
  59 #define SHA_REG_CTRL_OUTPUT_READY       (1 << 0)
  60
  61 #define SHA_REG_REV(dd)                 ((dd)->pdata->rev_ofs)
  62
  63 #define SHA_REG_MASK(dd)                ((dd)->pdata->mask_ofs)
  64 #define SHA_REG_MASK_DMA_EN             (1 << 3)
  65 #define SHA_REG_MASK_IT_EN              (1 << 2)
  66 #define SHA_REG_MASK_SOFTRESET          (1 << 1)
  67 #define SHA_REG_AUTOIDLE                (1 << 0)
  68
  69 #define SHA_REG_SYSSTATUS(dd)           ((dd)->pdata->sysstatus_ofs)
  70 #define SHA_REG_SYSSTATUS_RESETDONE     (1 << 0)
  71
  72 #define SHA_REG_MODE(dd)                ((dd)->pdata->mode_ofs)
  73 #define SHA_REG_MODE_HMAC_OUTER_HASH    (1 << 7)
  74 #define SHA_REG_MODE_HMAC_KEY_PROC      (1 << 5)
  75 #define SHA_REG_MODE_CLOSE_HASH         (1 << 4)
  76 #define SHA_REG_MODE_ALGO_CONSTANT      (1 << 3)
  77
  78 #define SHA_REG_MODE_ALGO_MASK          (7 << 0)
  79 #define SHA_REG_MODE_ALGO_MD5_128       (0 << 1)
  80 #define SHA_REG_MODE_ALGO_SHA1_160      (1 << 1)
  81 #define SHA_REG_MODE_ALGO_SHA2_224      (2 << 1)
  82 #define SHA_REG_MODE_ALGO_SHA2_256      (3 << 1)
  83 #define SHA_REG_MODE_ALGO_SHA2_384      (1 << 0)
  84 #define SHA_REG_MODE_ALGO_SHA2_512      (3 << 0)
  85
  86 #define SHA_REG_LENGTH(dd)              ((dd)->pdata->length_ofs)
  87
  88 #define SHA_REG_IRQSTATUS               0x118
  89 #define SHA_REG_IRQSTATUS_CTX_RDY       (1 << 3)
  90 #define SHA_REG_IRQSTATUS_PARTHASH_RDY (1 << 2)
  91 #define SHA_REG_IRQSTATUS_INPUT_RDY     (1 << 1)
  92 #define SHA_REG_IRQSTATUS_OUTPUT_RDY    (1 << 0)
  93
  94 #define SHA_REG_IRQENA                  0x11C
  95 #define SHA_REG_IRQENA_CTX_RDY          (1 << 3)
  96 #define SHA_REG_IRQENA_PARTHASH_RDY     (1 << 2)
  97 #define SHA_REG_IRQENA_INPUT_RDY        (1 << 1)
  98 #define SHA_REG_IRQENA_OUTPUT_RDY       (1 << 0)
  99
 100 #define DEFAULT_TIMEOUT_INTERVAL        HZ
 101
 102 #define DEFAULT_AUTOSUSPEND_DELAY       1000
 103
 104 /* mostly device flags */
 105 #define FLAGS_FINAL             1
 106 #define FLAGS_DMA_ACTIVE        2
 107 #define FLAGS_OUTPUT_READY      3
 108 #define FLAGS_CPU               5
 109 #define FLAGS_DMA_READY         6
 110 #define FLAGS_AUTO_XOR          7
 111 #define FLAGS_BE32_SHA1         8
 112 #define FLAGS_SGS_COPIED        9
 113 #define FLAGS_SGS_ALLOCED       10
 114 #define FLAGS_HUGE              11
 115
 116 /* context flags */
 117 #define FLAGS_FINUP             16
 118
 119 #define FLAGS_MODE_SHIFT        18
 120 #define FLAGS_MODE_MASK         (SHA_REG_MODE_ALGO_MASK << FLAGS_MODE_SHIFT)
 121 #define FLAGS_MODE_MD5          (SHA_REG_MODE_ALGO_MD5_128 << FLAGS_MODE_SHIFT)
 122 #define FLAGS_MODE_SHA1         (SHA_REG_MODE_ALGO_SHA1_160 << FLAGS_MODE_SHIFT)
 123 #define FLAGS_MODE_SHA224       (SHA_REG_MODE_ALGO_SHA2_224 << FLAGS_MODE_SHIFT)
 124 #define FLAGS_MODE_SHA256       (SHA_REG_MODE_ALGO_SHA2_256 << FLAGS_MODE_SHIFT)
 125 #define FLAGS_MODE_SHA384       (SHA_REG_MODE_ALGO_SHA2_384 << FLAGS_MODE_SHIFT)
 126 #define FLAGS_MODE_SHA512       (SHA_REG_MODE_ALGO_SHA2_512 << FLAGS_MODE_SHIFT)
 127
 128 #define FLAGS_HMAC              21
 129 #define FLAGS_ERROR             22
 130
 131 #define OP_UPDATE               1
 132 #define OP_FINAL                2
 133
 134 #define OMAP_ALIGN_MASK         (sizeof(u32)-1)
 135 #define OMAP_ALIGNED            __attribute__((aligned(sizeof(u32))))
 136
 137 #define BUFLEN                  SHA512_BLOCK_SIZE
 138 #define OMAP_SHA_DMA_THRESHOLD  256
 139
 140 #define OMAP_SHA_MAX_DMA_LEN    (1024 * 2048)
 141
 142 struct omap_sham_dev;
 143
 144 struct omap_sham_reqctx {
 145         struct omap_sham_dev    *dd;
 146         unsigned long           flags;
 147         u8                      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[] 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 crypto_engine_ctx        enginectx;
 172         unsigned long           flags;
 173
 174         /* fallback stuff */
 175         struct crypto_shash     *fallback;
 176
 177         struct omap_sham_hmac_ctx base[];
 178 };
 179
 180 #define OMAP_SHAM_QUEUE_LENGTH  10
 181
 182 struct omap_sham_algs_info {
 183         struct ahash_alg        *algs_list;
 184         unsigned int            size;
 185         unsigned int            registered;
 186 };
 187
 188 struct omap_sham_pdata {
 189         struct omap_sham_algs_info      *algs_info;
 190         unsigned int    algs_info_size;
 191         unsigned long   flags;
 192         int             digest_size;
 193
 194         void            (*copy_hash)(struct ahash_request *req, int out);
 195         void            (*write_ctrl)(struct omap_sham_dev *dd, size_t length,
 196                                       int final, int dma);
 197         void            (*trigger)(struct omap_sham_dev *dd, size_t length);
 198         int             (*poll_irq)(struct omap_sham_dev *dd);
 199         irqreturn_t     (*intr_hdlr)(int irq, void *dev_id);
 200
 201         u32             odigest_ofs;
 202         u32             idigest_ofs;
 203         u32             din_ofs;
 204         u32             digcnt_ofs;
 205         u32             rev_ofs;
 206         u32             mask_ofs;
 207         u32             sysstatus_ofs;
 208         u32             mode_ofs;
 209         u32             length_ofs;
 210
 211         u32             major_mask;
 212         u32             major_shift;
 213         u32             minor_mask;
 214         u32             minor_shift;
 215 };
 216
 217 struct omap_sham_dev {
 218         struct list_head        list;
 219         unsigned long           phys_base;
 220         struct device           *dev;
 221         void __iomem            *io_base;
 222         int                     irq;
 223         int                     err;
 224         struct dma_chan         *dma_lch;
 225         struct tasklet_struct   done_task;
 226         u8                      polling_mode;
 227         u8                      xmit_buf[BUFLEN] OMAP_ALIGNED;
 228
 229         unsigned long           flags;
 230         int                     fallback_sz;
 231         struct crypto_queue     queue;
 232         struct ahash_request    *req;
 233         struct crypto_engine    *engine;
 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 int omap_sham_enqueue(struct ahash_request *req, unsigned int op);
 250 static void omap_sham_finish_req(struct ahash_request *req, int err);
 251
 252 static inline u32 omap_sham_read(struct omap_sham_dev *dd, u32 offset)
 253 {
 254         return __raw_readl(dd->io_base + offset);
 255 }
 256
 257 static inline void omap_sham_write(struct omap_sham_dev *dd,
 258                                         u32 offset, u32 value)
 259 {
 260         __raw_writel(value, dd->io_base + offset);
 261 }
 262
 263 static inline void omap_sham_write_mask(struct omap_sham_dev *dd, u32 address,
 264                                         u32 value, u32 mask)
 265 {
 266         u32 val;
 267
 268         val = omap_sham_read(dd, address);
 269         val &= ~mask;
 270         val |= value;
 271         omap_sham_write(dd, address, val);
 272 }
 273
 274 static inline int omap_sham_wait(struct omap_sham_dev *dd, u32 offset, u32 bit)
 275 {
 276         unsigned long timeout = jiffies + DEFAULT_TIMEOUT_INTERVAL;
 277
 278         while (!(omap_sham_read(dd, offset) & bit)) {
 279                 if (time_is_before_jiffies(timeout))
 280                         return -ETIMEDOUT;
 281         }
 282
 283         return 0;
 284 }
 285
 286 static void omap_sham_copy_hash_omap2(struct ahash_request *req, int out)
 287 {
 288         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 289         struct omap_sham_dev *dd = ctx->dd;
 290         u32 *hash = (u32 *)ctx->digest;
 291         int i;
 292
 293         for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) {
 294                 if (out)
 295                         hash[i] = omap_sham_read(dd, SHA_REG_IDIGEST(dd, i));
 296                 else
 297                         omap_sham_write(dd, SHA_REG_IDIGEST(dd, i), hash[i]);
 298         }
 299 }
 300
 301 static void omap_sham_copy_hash_omap4(struct ahash_request *req, int out)
 302 {
 303         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 304         struct omap_sham_dev *dd = ctx->dd;
 305         int i;
 306
 307         if (ctx->flags & BIT(FLAGS_HMAC)) {
 308                 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
 309                 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
 310                 struct omap_sham_hmac_ctx *bctx = tctx->base;
 311                 u32 *opad = (u32 *)bctx->opad;
 312
 313                 for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) {
 314                         if (out)
 315                                 opad[i] = omap_sham_read(dd,
 316                                                 SHA_REG_ODIGEST(dd, i));
 317                         else
 318                                 omap_sham_write(dd, SHA_REG_ODIGEST(dd, i),
 319                                                 opad[i]);
 320                 }
 321         }
 322
 323         omap_sham_copy_hash_omap2(req, out);
 324 }
 325
 326 static void omap_sham_copy_ready_hash(struct ahash_request *req)
 327 {
 328         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 329         u32 *in = (u32 *)ctx->digest;
 330         u32 *hash = (u32 *)req->result;
 331         int i, d, big_endian = 0;
 332
 333         if (!hash)
 334                 return;
 335
 336         switch (ctx->flags & FLAGS_MODE_MASK) {
 337         case FLAGS_MODE_MD5:
 338                 d = MD5_DIGEST_SIZE / sizeof(u32);
 339                 break;
 340         case FLAGS_MODE_SHA1:
 341                 /* OMAP2 SHA1 is big endian */
 342                 if (test_bit(FLAGS_BE32_SHA1, &ctx->dd->flags))
 343                         big_endian = 1;
 344                 d = SHA1_DIGEST_SIZE / sizeof(u32);
 345                 break;
 346         case FLAGS_MODE_SHA224:
 347                 d = SHA224_DIGEST_SIZE / sizeof(u32);
 348                 break;
 349         case FLAGS_MODE_SHA256:
 350                 d = SHA256_DIGEST_SIZE / sizeof(u32);
 351                 break;
 352         case FLAGS_MODE_SHA384:
 353                 d = SHA384_DIGEST_SIZE / sizeof(u32);
 354                 break;
 355         case FLAGS_MODE_SHA512:
 356                 d = SHA512_DIGEST_SIZE / sizeof(u32);
 357                 break;
 358         default:
 359                 d = 0;
 360         }
 361
 362         if (big_endian)
 363                 for (i = 0; i < d; i++)
 364                         hash[i] = be32_to_cpup((__be32 *)in + i);
 365         else
 366                 for (i = 0; i < d; i++)
 367                         hash[i] = le32_to_cpup((__le32 *)in + i);
 368 }
 369
 370 static void omap_sham_write_ctrl_omap2(struct omap_sham_dev *dd, size_t length,
 371                                  int final, int dma)
 372 {
 373         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 374         u32 val = length << 5, mask;
 375
 376         if (likely(ctx->digcnt))
 377                 omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt);
 378
 379         omap_sham_write_mask(dd, SHA_REG_MASK(dd),
 380                 SHA_REG_MASK_IT_EN | (dma ? SHA_REG_MASK_DMA_EN : 0),
 381                 SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
 382         /*
 383          * Setting ALGO_CONST only for the first iteration
 384          * and CLOSE_HASH only for the last one.
 385          */
 386         if ((ctx->flags & FLAGS_MODE_MASK) == FLAGS_MODE_SHA1)
 387                 val |= SHA_REG_CTRL_ALGO;
 388         if (!ctx->digcnt)
 389                 val |= SHA_REG_CTRL_ALGO_CONST;
 390         if (final)
 391                 val |= SHA_REG_CTRL_CLOSE_HASH;
 392
 393         mask = SHA_REG_CTRL_ALGO_CONST | SHA_REG_CTRL_CLOSE_HASH |
 394                         SHA_REG_CTRL_ALGO | SHA_REG_CTRL_LENGTH;
 395
 396         omap_sham_write_mask(dd, SHA_REG_CTRL, val, mask);
 397 }
 398
 399 static void omap_sham_trigger_omap2(struct omap_sham_dev *dd, size_t length)
 400 {
 401 }
 402
 403 static int omap_sham_poll_irq_omap2(struct omap_sham_dev *dd)
 404 {
 405         return omap_sham_wait(dd, SHA_REG_CTRL, SHA_REG_CTRL_INPUT_READY);
 406 }
 407
 408 static int get_block_size(struct omap_sham_reqctx *ctx)
 409 {
 410         int d;
 411
 412         switch (ctx->flags & FLAGS_MODE_MASK) {
 413         case FLAGS_MODE_MD5:
 414         case FLAGS_MODE_SHA1:
 415                 d = SHA1_BLOCK_SIZE;
 416                 break;
 417         case FLAGS_MODE_SHA224:
 418         case FLAGS_MODE_SHA256:
 419                 d = SHA256_BLOCK_SIZE;
 420                 break;
 421         case FLAGS_MODE_SHA384:
 422         case FLAGS_MODE_SHA512:
 423                 d = SHA512_BLOCK_SIZE;
 424                 break;
 425         default:
 426                 d = 0;
 427         }
 428
 429         return d;
 430 }
 431
 432 static void omap_sham_write_n(struct omap_sham_dev *dd, u32 offset,
 433                                     u32 *value, int count)
 434 {
 435         for (; count--; value++, offset += 4)
 436                 omap_sham_write(dd, offset, *value);
 437 }
 438
 439 static void omap_sham_write_ctrl_omap4(struct omap_sham_dev *dd, size_t length,
 440                                  int final, int dma)
 441 {
 442         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 443         u32 val, mask;
 444
 445         if (likely(ctx->digcnt))
 446                 omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt);
 447
 448         /*
 449          * Setting ALGO_CONST only for the first iteration and
 450          * CLOSE_HASH only for the last one. Note that flags mode bits
 451          * correspond to algorithm encoding in mode register.
 452          */
 453         val = (ctx->flags & FLAGS_MODE_MASK) >> (FLAGS_MODE_SHIFT);
 454         if (!ctx->digcnt) {
 455                 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
 456                 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
 457                 struct omap_sham_hmac_ctx *bctx = tctx->base;
 458                 int bs, nr_dr;
 459
 460                 val |= SHA_REG_MODE_ALGO_CONSTANT;
 461
 462                 if (ctx->flags & BIT(FLAGS_HMAC)) {
 463                         bs = get_block_size(ctx);
 464                         nr_dr = bs / (2 * sizeof(u32));
 465                         val |= SHA_REG_MODE_HMAC_KEY_PROC;
 466                         omap_sham_write_n(dd, SHA_REG_ODIGEST(dd, 0),
 467                                           (u32 *)bctx->ipad, nr_dr);
 468                         omap_sham_write_n(dd, SHA_REG_IDIGEST(dd, 0),
 469                                           (u32 *)bctx->ipad + nr_dr, nr_dr);
 470                         ctx->digcnt += bs;
 471                 }
 472         }
 473
 474         if (final) {
 475                 val |= SHA_REG_MODE_CLOSE_HASH;
 476
 477                 if (ctx->flags & BIT(FLAGS_HMAC))
 478                         val |= SHA_REG_MODE_HMAC_OUTER_HASH;
 479         }
 480
 481         mask = SHA_REG_MODE_ALGO_CONSTANT | SHA_REG_MODE_CLOSE_HASH |
 482                SHA_REG_MODE_ALGO_MASK | SHA_REG_MODE_HMAC_OUTER_HASH |
 483                SHA_REG_MODE_HMAC_KEY_PROC;
 484
 485         dev_dbg(dd->dev, "ctrl: %08x, flags: %08lx\n", val, ctx->flags);
 486         omap_sham_write_mask(dd, SHA_REG_MODE(dd), val, mask);
 487         omap_sham_write(dd, SHA_REG_IRQENA, SHA_REG_IRQENA_OUTPUT_RDY);
 488         omap_sham_write_mask(dd, SHA_REG_MASK(dd),
 489                              SHA_REG_MASK_IT_EN |
 490                                      (dma ? SHA_REG_MASK_DMA_EN : 0),
 491                              SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
 492 }
 493
 494 static void omap_sham_trigger_omap4(struct omap_sham_dev *dd, size_t length)
 495 {
 496         omap_sham_write(dd, SHA_REG_LENGTH(dd), length);
 497 }
 498
 499 static int omap_sham_poll_irq_omap4(struct omap_sham_dev *dd)
 500 {
 501         return omap_sham_wait(dd, SHA_REG_IRQSTATUS,
 502                               SHA_REG_IRQSTATUS_INPUT_RDY);
 503 }
 504
 505 static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, size_t length,
 506                               int final)
 507 {
 508         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 509         int count, len32, bs32, offset = 0;
 510         const u32 *buffer;
 511         int mlen;
 512         struct sg_mapping_iter mi;
 513
 514         dev_dbg(dd->dev, "xmit_cpu: digcnt: %zd, length: %zd, final: %d\n",
 515                                                 ctx->digcnt, length, final);
 516
 517         dd->pdata->write_ctrl(dd, length, final, 0);
 518         dd->pdata->trigger(dd, length);
 519
 520         /* should be non-zero before next lines to disable clocks later */
 521         ctx->digcnt += length;
 522         ctx->total -= length;
 523
 524         if (final)
 525                 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
 526
 527         set_bit(FLAGS_CPU, &dd->flags);
 528
 529         len32 = DIV_ROUND_UP(length, sizeof(u32));
 530         bs32 = get_block_size(ctx) / sizeof(u32);
 531
 532         sg_miter_start(&mi, ctx->sg, ctx->sg_len,
 533                        SG_MITER_FROM_SG | SG_MITER_ATOMIC);
 534
 535         mlen = 0;
 536
 537         while (len32) {
 538                 if (dd->pdata->poll_irq(dd))
 539                         return -ETIMEDOUT;
 540
 541                 for (count = 0; count < min(len32, bs32); count++, offset++) {
 542                         if (!mlen) {
 543                                 sg_miter_next(&mi);
 544                                 mlen = mi.length;
 545                                 if (!mlen) {
 546                                         pr_err("sg miter failure.\n");
 547                                         return -EINVAL;
 548                                 }
 549                                 offset = 0;
 550                                 buffer = mi.addr;
 551                         }
 552                         omap_sham_write(dd, SHA_REG_DIN(dd, count),
 553                                         buffer[offset]);
 554                         mlen -= 4;
 555                 }
 556                 len32 -= min(len32, bs32);
 557         }
 558
 559         sg_miter_stop(&mi);
 560
 561         return -EINPROGRESS;
 562 }
 563
 564 static void omap_sham_dma_callback(void *param)
 565 {
 566         struct omap_sham_dev *dd = param;
 567
 568         set_bit(FLAGS_DMA_READY, &dd->flags);
 569         tasklet_schedule(&dd->done_task);
 570 }
 571
 572 static int omap_sham_xmit_dma(struct omap_sham_dev *dd, size_t length,
 573                               int final)
 574 {
 575         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 576         struct dma_async_tx_descriptor *tx;
 577         struct dma_slave_config cfg;
 578         int ret;
 579
 580         dev_dbg(dd->dev, "xmit_dma: digcnt: %zd, length: %zd, final: %d\n",
 581                                                 ctx->digcnt, length, final);
 582
 583         if (!dma_map_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE)) {
 584                 dev_err(dd->dev, "dma_map_sg error\n");
 585                 return -EINVAL;
 586         }
 587
 588         memset(&cfg, 0, sizeof(cfg));
 589
 590         cfg.dst_addr = dd->phys_base + SHA_REG_DIN(dd, 0);
 591         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 592         cfg.dst_maxburst = get_block_size(ctx) / DMA_SLAVE_BUSWIDTH_4_BYTES;
 593
 594         ret = dmaengine_slave_config(dd->dma_lch, &cfg);
 595         if (ret) {
 596                 pr_err("omap-sham: can't configure dmaengine slave: %d\n", ret);
 597                 return ret;
 598         }
 599
 600         tx = dmaengine_prep_slave_sg(dd->dma_lch, ctx->sg, ctx->sg_len,
 601                                      DMA_MEM_TO_DEV,
 602                                      DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 603
 604         if (!tx) {
 605                 dev_err(dd->dev, "prep_slave_sg failed\n");
 606                 return -EINVAL;
 607         }
 608
 609         tx->callback = omap_sham_dma_callback;
 610         tx->callback_param = dd;
 611
 612         dd->pdata->write_ctrl(dd, length, final, 1);
 613
 614         ctx->digcnt += length;
 615         ctx->total -= length;
 616
 617         if (final)
 618                 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
 619
 620         set_bit(FLAGS_DMA_ACTIVE, &dd->flags);
 621
 622         dmaengine_submit(tx);
 623         dma_async_issue_pending(dd->dma_lch);
 624
 625         dd->pdata->trigger(dd, length);
 626
 627         return -EINPROGRESS;
 628 }
 629
 630 static int omap_sham_copy_sg_lists(struct omap_sham_reqctx *ctx,
 631                                    struct scatterlist *sg, int bs, int new_len)
 632 {
 633         int n = sg_nents(sg);
 634         struct scatterlist *tmp;
 635         int offset = ctx->offset;
 636
 637         ctx->total = new_len;
 638
 639         if (ctx->bufcnt)
 640                 n++;
 641
 642         ctx->sg = kmalloc_array(n, sizeof(*sg), GFP_KERNEL);
 643         if (!ctx->sg)
 644                 return -ENOMEM;
 645
 646         sg_init_table(ctx->sg, n);
 647
 648         tmp = ctx->sg;
 649
 650         ctx->sg_len = 0;
 651
 652         if (ctx->bufcnt) {
 653                 sg_set_buf(tmp, ctx->dd->xmit_buf, ctx->bufcnt);
 654                 tmp = sg_next(tmp);
 655                 ctx->sg_len++;
 656                 new_len -= ctx->bufcnt;
 657         }
 658
 659         while (sg && new_len) {
 660                 int len = sg->length - offset;
 661
 662                 if (len <= 0) {
 663                         offset -= sg->length;
 664                         sg = sg_next(sg);
 665                         continue;
 666                 }
 667
 668                 if (new_len < len)
 669                         len = new_len;
 670
 671                 if (len > 0) {
 672                         new_len -= len;
 673                         sg_set_page(tmp, sg_page(sg), len, sg->offset + offset);
 674                         offset = 0;
 675                         ctx->offset = 0;
 676                         ctx->sg_len++;
 677                         if (new_len <= 0)
 678                                 break;
 679                         tmp = sg_next(tmp);
 680                 }
 681
 682                 sg = sg_next(sg);
 683         }
 684
 685         if (tmp)
 686                 sg_mark_end(tmp);
 687
 688         set_bit(FLAGS_SGS_ALLOCED, &ctx->dd->flags);
 689
 690         ctx->offset += new_len - ctx->bufcnt;
 691         ctx->bufcnt = 0;
 692
 693         return 0;
 694 }
 695
 696 static int omap_sham_copy_sgs(struct omap_sham_reqctx *ctx,
 697                               struct scatterlist *sg, int bs,
 698                               unsigned int new_len)
 699 {
 700         int pages;
 701         void *buf;
 702
 703         pages = get_order(new_len);
 704
 705         buf = (void *)__get_free_pages(GFP_ATOMIC, pages);
 706         if (!buf) {
 707                 pr_err("Couldn't allocate pages for unaligned cases.\n");
 708                 return -ENOMEM;
 709         }
 710
 711         if (ctx->bufcnt)
 712                 memcpy(buf, ctx->dd->xmit_buf, ctx->bufcnt);
 713
 714         scatterwalk_map_and_copy(buf + ctx->bufcnt, sg, ctx->offset,
 715                                  min(new_len, ctx->total) - ctx->bufcnt, 0);
 716         sg_init_table(ctx->sgl, 1);
 717         sg_set_buf(ctx->sgl, buf, new_len);
 718         ctx->sg = ctx->sgl;
 719         set_bit(FLAGS_SGS_COPIED, &ctx->dd->flags);
 720         ctx->sg_len = 1;
 721         ctx->offset += new_len - ctx->bufcnt;
 722         ctx->bufcnt = 0;
 723         ctx->total = new_len;
 724
 725         return 0;
 726 }
 727
 728 static int omap_sham_align_sgs(struct scatterlist *sg,
 729                                int nbytes, int bs, bool final,
 730                                struct omap_sham_reqctx *rctx)
 731 {
 732         int n = 0;
 733         bool aligned = true;
 734         bool list_ok = true;
 735         struct scatterlist *sg_tmp = sg;
 736         int new_len;
 737         int offset = rctx->offset;
 738         int bufcnt = rctx->bufcnt;
 739
 740         if (!sg || !sg->length || !nbytes) {
 741                 if (bufcnt) {
 742                         bufcnt = DIV_ROUND_UP(bufcnt, bs) * bs;
 743                         sg_init_table(rctx->sgl, 1);
 744                         sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, bufcnt);
 745                         rctx->sg = rctx->sgl;
 746                         rctx->sg_len = 1;
 747                 }
 748
 749                 return 0;
 750         }
 751
 752         new_len = nbytes;
 753
 754         if (offset)
 755                 list_ok = false;
 756
 757         if (final)
 758                 new_len = DIV_ROUND_UP(new_len, bs) * bs;
 759         else
 760                 new_len = (new_len - 1) / bs * bs;
 761
 762         if (!new_len)
 763                 return 0;
 764
 765         if (nbytes != new_len)
 766                 list_ok = false;
 767
 768         while (nbytes > 0 && sg_tmp) {
 769                 n++;
 770
 771                 if (bufcnt) {
 772                         if (!IS_ALIGNED(bufcnt, bs)) {
 773                                 aligned = false;
 774                                 break;
 775                         }
 776                         nbytes -= bufcnt;
 777                         bufcnt = 0;
 778                         if (!nbytes)
 779                                 list_ok = false;
 780
 781                         continue;
 782                 }
 783
 784 #ifdef CONFIG_ZONE_DMA
 785                 if (page_zonenum(sg_page(sg_tmp)) != ZONE_DMA) {
 786                         aligned = false;
 787                         break;
 788                 }
 789 #endif
 790
 791                 if (offset < sg_tmp->length) {
 792                         if (!IS_ALIGNED(offset + sg_tmp->offset, 4)) {
 793                                 aligned = false;
 794                                 break;
 795                         }
 796
 797                         if (!IS_ALIGNED(sg_tmp->length - offset, bs)) {
 798                                 aligned = false;
 799                                 break;
 800                         }
 801                 }
 802
 803                 if (offset) {
 804                         offset -= sg_tmp->length;
 805                         if (offset < 0) {
 806                                 nbytes += offset;
 807                                 offset = 0;
 808                         }
 809                 } else {
 810                         nbytes -= sg_tmp->length;
 811                 }
 812
 813                 sg_tmp = sg_next(sg_tmp);
 814
 815                 if (nbytes < 0) {
 816                         list_ok = false;
 817                         break;
 818                 }
 819         }
 820
 821         if (new_len > OMAP_SHA_MAX_DMA_LEN) {
 822                 new_len = OMAP_SHA_MAX_DMA_LEN;
 823                 aligned = false;
 824         }
 825
 826         if (!aligned)
 827                 return omap_sham_copy_sgs(rctx, sg, bs, new_len);
 828         else if (!list_ok)
 829                 return omap_sham_copy_sg_lists(rctx, sg, bs, new_len);
 830
 831         rctx->total = new_len;
 832         rctx->offset += new_len;
 833         rctx->sg_len = n;
 834         if (rctx->bufcnt) {
 835                 sg_init_table(rctx->sgl, 2);
 836                 sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, rctx->bufcnt);
 837                 sg_chain(rctx->sgl, 2, sg);
 838                 rctx->sg = rctx->sgl;
 839         } else {
 840                 rctx->sg = sg;
 841         }
 842
 843         return 0;
 844 }
 845
 846 static int omap_sham_prepare_request(struct crypto_engine *engine, void *areq)
 847 {
 848         struct ahash_request *req = container_of(areq, struct ahash_request,
 849                                                  base);
 850         struct omap_sham_reqctx *rctx = ahash_request_ctx(req);
 851         int bs;
 852         int ret;
 853         unsigned int nbytes;
 854         bool final = rctx->flags & BIT(FLAGS_FINUP);
 855         bool update = rctx->op == OP_UPDATE;
 856         int hash_later;
 857
 858         bs = get_block_size(rctx);
 859
 860         nbytes = rctx->bufcnt;
 861
 862         if (update)
 863                 nbytes += req->nbytes - rctx->offset;
 864
 865         dev_dbg(rctx->dd->dev,
 866                 "%s: nbytes=%d, bs=%d, total=%d, offset=%d, bufcnt=%zd\n",
 867                 __func__, nbytes, bs, rctx->total, rctx->offset,
 868                 rctx->bufcnt);
 869
 870         if (!nbytes)
 871                 return 0;
 872
 873         rctx->total = nbytes;
 874
 875         if (update && req->nbytes && (!IS_ALIGNED(rctx->bufcnt, bs))) {
 876                 int len = bs - rctx->bufcnt % bs;
 877
 878                 if (len > req->nbytes)
 879                         len = req->nbytes;
 880                 scatterwalk_map_and_copy(rctx->buffer + rctx->bufcnt, req->src,
 881                                          0, len, 0);
 882                 rctx->bufcnt += len;
 883                 rctx->offset = len;
 884         }
 885
 886         if (rctx->bufcnt)
 887                 memcpy(rctx->dd->xmit_buf, rctx->buffer, rctx->bufcnt);
 888
 889         ret = omap_sham_align_sgs(req->src, nbytes, bs, final, rctx);
 890         if (ret)
 891                 return ret;
 892
 893         hash_later = nbytes - rctx->total;
 894         if (hash_later < 0)
 895                 hash_later = 0;
 896
 897         if (hash_later && hash_later <= rctx->buflen) {
 898                 scatterwalk_map_and_copy(rctx->buffer,
 899                                          req->src,
 900                                          req->nbytes - hash_later,
 901                                          hash_later, 0);
 902
 903                 rctx->bufcnt = hash_later;
 904         } else {
 905                 rctx->bufcnt = 0;
 906         }
 907
 908         if (hash_later > rctx->buflen)
 909                 set_bit(FLAGS_HUGE, &rctx->dd->flags);
 910
 911         rctx->total = min(nbytes, rctx->total);
 912
 913         return 0;
 914 }
 915
 916 static int omap_sham_update_dma_stop(struct omap_sham_dev *dd)
 917 {
 918         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 919
 920         dma_unmap_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE);
 921
 922         clear_bit(FLAGS_DMA_ACTIVE, &dd->flags);
 923
 924         return 0;
 925 }
 926
 927 static struct omap_sham_dev *omap_sham_find_dev(struct omap_sham_reqctx *ctx)
 928 {
 929         struct omap_sham_dev *dd;
 930
 931         if (ctx->dd)
 932                 return ctx->dd;
 933
 934         spin_lock_bh(&sham.lock);
 935         dd = list_first_entry(&sham.dev_list, struct omap_sham_dev, list);
 936         list_move_tail(&dd->list, &sham.dev_list);
 937         ctx->dd = dd;
 938         spin_unlock_bh(&sham.lock);
 939
 940         return dd;
 941 }
 942
 943 static int omap_sham_init(struct ahash_request *req)
 944 {
 945         struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
 946         struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
 947         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 948         struct omap_sham_dev *dd;
 949         int bs = 0;
 950
 951         ctx->dd = NULL;
 952
 953         dd = omap_sham_find_dev(ctx);
 954         if (!dd)
 955                 return -ENODEV;
 956
 957         ctx->flags = 0;
 958
 959         dev_dbg(dd->dev, "init: digest size: %d\n",
 960                 crypto_ahash_digestsize(tfm));
 961
 962         switch (crypto_ahash_digestsize(tfm)) {
 963         case MD5_DIGEST_SIZE:
 964                 ctx->flags |= FLAGS_MODE_MD5;
 965                 bs = SHA1_BLOCK_SIZE;
 966                 break;
 967         case SHA1_DIGEST_SIZE:
 968                 ctx->flags |= FLAGS_MODE_SHA1;
 969                 bs = SHA1_BLOCK_SIZE;
 970                 break;
 971         case SHA224_DIGEST_SIZE:
 972                 ctx->flags |= FLAGS_MODE_SHA224;
 973                 bs = SHA224_BLOCK_SIZE;
 974                 break;
 975         case SHA256_DIGEST_SIZE:
 976                 ctx->flags |= FLAGS_MODE_SHA256;
 977                 bs = SHA256_BLOCK_SIZE;
 978                 break;
 979         case SHA384_DIGEST_SIZE:
 980                 ctx->flags |= FLAGS_MODE_SHA384;
 981                 bs = SHA384_BLOCK_SIZE;
 982                 break;
 983         case SHA512_DIGEST_SIZE:
 984                 ctx->flags |= FLAGS_MODE_SHA512;
 985                 bs = SHA512_BLOCK_SIZE;
 986                 break;
 987         }
 988
 989         ctx->bufcnt = 0;
 990         ctx->digcnt = 0;
 991         ctx->total = 0;
 992         ctx->offset = 0;
 993         ctx->buflen = BUFLEN;
 994
 995         if (tctx->flags & BIT(FLAGS_HMAC)) {
 996                 if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) {
 997                         struct omap_sham_hmac_ctx *bctx = tctx->base;
 998
 999                         memcpy(ctx->buffer, bctx->ipad, bs);
1000                         ctx->bufcnt = bs;
1001                 }
1002
1003                 ctx->flags |= BIT(FLAGS_HMAC);
1004         }
1005
1006         return 0;
1007
1008 }
1009
1010 static int omap_sham_update_req(struct omap_sham_dev *dd)
1011 {
1012         struct ahash_request *req = dd->req;
1013         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1014         int err;
1015         bool final = (ctx->flags & BIT(FLAGS_FINUP)) &&
1016                 !(dd->flags & BIT(FLAGS_HUGE));
1017
1018         dev_dbg(dd->dev, "update_req: total: %u, digcnt: %zd, final: %d",
1019                 ctx->total, ctx->digcnt, final);
1020
1021         if (ctx->total < get_block_size(ctx) ||
1022             ctx->total < dd->fallback_sz)
1023                 ctx->flags |= BIT(FLAGS_CPU);
1024
1025         if (ctx->flags & BIT(FLAGS_CPU))
1026                 err = omap_sham_xmit_cpu(dd, ctx->total, final);
1027         else
1028                 err = omap_sham_xmit_dma(dd, ctx->total, final);
1029
1030         /* wait for dma completion before can take more data */
1031         dev_dbg(dd->dev, "update: err: %d, digcnt: %zd\n", err, ctx->digcnt);
1032
1033         return err;
1034 }
1035
1036 static int omap_sham_final_req(struct omap_sham_dev *dd)
1037 {
1038         struct ahash_request *req = dd->req;
1039         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1040         int err = 0, use_dma = 1;
1041
1042         if (dd->flags & BIT(FLAGS_HUGE))
1043                 return 0;
1044
1045         if ((ctx->total <= get_block_size(ctx)) || dd->polling_mode)
1046                 /*
1047                  * faster to handle last block with cpu or
1048                  * use cpu when dma is not present.
1049                  */
1050                 use_dma = 0;
1051
1052         if (use_dma)
1053                 err = omap_sham_xmit_dma(dd, ctx->total, 1);
1054         else
1055                 err = omap_sham_xmit_cpu(dd, ctx->total, 1);
1056
1057         ctx->bufcnt = 0;
1058
1059         dev_dbg(dd->dev, "final_req: err: %d\n", err);
1060
1061         return err;
1062 }
1063
1064 static int omap_sham_hash_one_req(struct crypto_engine *engine, void *areq)
1065 {
1066         struct ahash_request *req = container_of(areq, struct ahash_request,
1067                                                  base);
1068         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1069         struct omap_sham_dev *dd = ctx->dd;
1070         int err;
1071         bool final = (ctx->flags & BIT(FLAGS_FINUP)) &&
1072                         !(dd->flags & BIT(FLAGS_HUGE));
1073
1074         dev_dbg(dd->dev, "hash-one: op: %u, total: %u, digcnt: %zd, final: %d",
1075                 ctx->op, ctx->total, ctx->digcnt, final);
1076
1077         err = pm_runtime_resume_and_get(dd->dev);
1078         if (err < 0) {
1079                 dev_err(dd->dev, "failed to get sync: %d\n", err);
1080                 return err;
1081         }
1082
1083         dd->err = 0;
1084         dd->req = req;
1085
1086         if (ctx->digcnt)
1087                 dd->pdata->copy_hash(req, 0);
1088
1089         if (ctx->op == OP_UPDATE)
1090                 err = omap_sham_update_req(dd);
1091         else if (ctx->op == OP_FINAL)
1092                 err = omap_sham_final_req(dd);
1093
1094         if (err != -EINPROGRESS)
1095                 omap_sham_finish_req(req, err);
1096
1097         return 0;
1098 }
1099
1100 static int omap_sham_finish_hmac(struct ahash_request *req)
1101 {
1102         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1103         struct omap_sham_hmac_ctx *bctx = tctx->base;
1104         int bs = crypto_shash_blocksize(bctx->shash);
1105         int ds = crypto_shash_digestsize(bctx->shash);
1106         SHASH_DESC_ON_STACK(shash, bctx->shash);
1107
1108         shash->tfm = bctx->shash;
1109
1110         return crypto_shash_init(shash) ?:
1111                crypto_shash_update(shash, bctx->opad, bs) ?:
1112                crypto_shash_finup(shash, req->result, ds, req->result);
1113 }
1114
1115 static int omap_sham_finish(struct ahash_request *req)
1116 {
1117         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1118         struct omap_sham_dev *dd = ctx->dd;
1119         int err = 0;
1120
1121         if (ctx->digcnt) {
1122                 omap_sham_copy_ready_hash(req);
1123                 if ((ctx->flags & BIT(FLAGS_HMAC)) &&
1124                                 !test_bit(FLAGS_AUTO_XOR, &dd->flags))
1125                         err = omap_sham_finish_hmac(req);
1126         }
1127
1128         dev_dbg(dd->dev, "digcnt: %zd, bufcnt: %zd\n", ctx->digcnt, ctx->bufcnt);
1129
1130         return err;
1131 }
1132
1133 static void omap_sham_finish_req(struct ahash_request *req, int err)
1134 {
1135         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1136         struct omap_sham_dev *dd = ctx->dd;
1137
1138         if (test_bit(FLAGS_SGS_COPIED, &dd->flags))
1139                 free_pages((unsigned long)sg_virt(ctx->sg),
1140                            get_order(ctx->sg->length));
1141
1142         if (test_bit(FLAGS_SGS_ALLOCED, &dd->flags))
1143                 kfree(ctx->sg);
1144
1145         ctx->sg = NULL;
1146
1147         dd->flags &= ~(BIT(FLAGS_SGS_ALLOCED) | BIT(FLAGS_SGS_COPIED) |
1148                        BIT(FLAGS_CPU) | BIT(FLAGS_DMA_READY) |
1149                        BIT(FLAGS_OUTPUT_READY));
1150
1151         if (!err)
1152                 dd->pdata->copy_hash(req, 1);
1153
1154         if (dd->flags & BIT(FLAGS_HUGE)) {
1155                 /* Re-enqueue the request */
1156                 omap_sham_enqueue(req, ctx->op);
1157                 return;
1158         }
1159
1160         if (!err) {
1161                 if (test_bit(FLAGS_FINAL, &dd->flags))
1162                         err = omap_sham_finish(req);
1163         } else {
1164                 ctx->flags |= BIT(FLAGS_ERROR);
1165         }
1166
1167         /* atomic operation is not needed here */
1168         dd->flags &= ~(BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) |
1169                         BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY));
1170
1171         pm_runtime_mark_last_busy(dd->dev);
1172         pm_runtime_put_autosuspend(dd->dev);
1173
1174         ctx->offset = 0;
1175
1176         crypto_finalize_hash_request(dd->engine, req, err);
1177 }
1178
1179 static int omap_sham_handle_queue(struct omap_sham_dev *dd,
1180                                   struct ahash_request *req)
1181 {
1182         return crypto_transfer_hash_request_to_engine(dd->engine, req);
1183 }
1184
1185 static int omap_sham_enqueue(struct ahash_request *req, unsigned int op)
1186 {
1187         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1188         struct omap_sham_dev *dd = ctx->dd;
1189
1190         ctx->op = op;
1191
1192         return omap_sham_handle_queue(dd, req);
1193 }
1194
1195 static int omap_sham_update(struct ahash_request *req)
1196 {
1197         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1198         struct omap_sham_dev *dd = omap_sham_find_dev(ctx);
1199
1200         if (!req->nbytes)
1201                 return 0;
1202
1203         if (ctx->bufcnt + req->nbytes <= ctx->buflen) {
1204                 scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src,
1205                                          0, req->nbytes, 0);
1206                 ctx->bufcnt += req->nbytes;
1207                 return 0;
1208         }
1209
1210         if (dd->polling_mode)
1211                 ctx->flags |= BIT(FLAGS_CPU);
1212
1213         return omap_sham_enqueue(req, OP_UPDATE);
1214 }
1215
1216 static int omap_sham_final_shash(struct ahash_request *req)
1217 {
1218         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1219         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1220         int offset = 0;
1221
1222         /*
1223          * If we are running HMAC on limited hardware support, skip
1224          * the ipad in the beginning of the buffer if we are going for
1225          * software fallback algorithm.
1226          */
1227         if (test_bit(FLAGS_HMAC, &ctx->flags) &&
1228             !test_bit(FLAGS_AUTO_XOR, &ctx->dd->flags))
1229                 offset = get_block_size(ctx);
1230
1231         return crypto_shash_tfm_digest(tctx->fallback, ctx->buffer + offset,
1232                                        ctx->bufcnt - offset, req->result);
1233 }
1234
1235 static int omap_sham_final(struct ahash_request *req)
1236 {
1237         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1238
1239         ctx->flags |= BIT(FLAGS_FINUP);
1240
1241         if (ctx->flags & BIT(FLAGS_ERROR))
1242                 return 0; /* uncompleted hash is not needed */
1243
1244         /*
1245          * OMAP HW accel works only with buffers >= 9.
1246          * HMAC is always >= 9 because ipad == block size.
1247          * If buffersize is less than fallback_sz, we use fallback
1248          * SW encoding, as using DMA + HW in this case doesn't provide
1249          * any benefit.
1250          */
1251         if (!ctx->digcnt && ctx->bufcnt < ctx->dd->fallback_sz)
1252                 return omap_sham_final_shash(req);
1253         else if (ctx->bufcnt)
1254                 return omap_sham_enqueue(req, OP_FINAL);
1255
1256         /* copy ready hash (+ finalize hmac) */
1257         return omap_sham_finish(req);
1258 }
1259
1260 static int omap_sham_finup(struct ahash_request *req)
1261 {
1262         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1263         int err1, err2;
1264
1265         ctx->flags |= BIT(FLAGS_FINUP);
1266
1267         err1 = omap_sham_update(req);
1268         if (err1 == -EINPROGRESS || err1 == -EBUSY)
1269                 return err1;
1270         /*
1271          * final() has to be always called to cleanup resources
1272          * even if udpate() failed, except EINPROGRESS
1273          */
1274         err2 = omap_sham_final(req);
1275
1276         return err1 ?: err2;
1277 }
1278
1279 static int omap_sham_digest(struct ahash_request *req)
1280 {
1281         return omap_sham_init(req) ?: omap_sham_finup(req);
1282 }
1283
1284 static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key,
1285                       unsigned int keylen)
1286 {
1287         struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
1288         struct omap_sham_hmac_ctx *bctx = tctx->base;
1289         int bs = crypto_shash_blocksize(bctx->shash);
1290         int ds = crypto_shash_digestsize(bctx->shash);
1291         int err, i;
1292
1293         err = crypto_shash_setkey(tctx->fallback, key, keylen);
1294         if (err)
1295                 return err;
1296
1297         if (keylen > bs) {
1298                 err = crypto_shash_tfm_digest(bctx->shash, key, keylen,
1299                                               bctx->ipad);
1300                 if (err)
1301                         return err;
1302                 keylen = ds;
1303         } else {
1304                 memcpy(bctx->ipad, key, keylen);
1305         }
1306
1307         memset(bctx->ipad + keylen, 0, bs - keylen);
1308
1309         if (!test_bit(FLAGS_AUTO_XOR, &sham.flags)) {
1310                 memcpy(bctx->opad, bctx->ipad, bs);
1311
1312                 for (i = 0; i < bs; i++) {
1313                         bctx->ipad[i] ^= HMAC_IPAD_VALUE;
1314                         bctx->opad[i] ^= HMAC_OPAD_VALUE;
1315                 }
1316         }
1317
1318         return err;
1319 }
1320
1321 static int omap_sham_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base)
1322 {
1323         struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
1324         const char *alg_name = crypto_tfm_alg_name(tfm);
1325
1326         /* Allocate a fallback and abort if it failed. */
1327         tctx->fallback = crypto_alloc_shash(alg_name, 0,
1328                                             CRYPTO_ALG_NEED_FALLBACK);
1329         if (IS_ERR(tctx->fallback)) {
1330                 pr_err("omap-sham: fallback driver '%s' "
1331                                 "could not be loaded.\n", alg_name);
1332                 return PTR_ERR(tctx->fallback);
1333         }
1334
1335         crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
1336                                  sizeof(struct omap_sham_reqctx) + BUFLEN);
1337
1338         if (alg_base) {
1339                 struct omap_sham_hmac_ctx *bctx = tctx->base;
1340                 tctx->flags |= BIT(FLAGS_HMAC);
1341                 bctx->shash = crypto_alloc_shash(alg_base, 0,
1342                                                 CRYPTO_ALG_NEED_FALLBACK);
1343                 if (IS_ERR(bctx->shash)) {
1344                         pr_err("omap-sham: base driver '%s' "
1345                                         "could not be loaded.\n", alg_base);
1346                         crypto_free_shash(tctx->fallback);
1347                         return PTR_ERR(bctx->shash);
1348                 }
1349
1350         }
1351
1352         tctx->enginectx.op.do_one_request = omap_sham_hash_one_req;
1353         tctx->enginectx.op.prepare_request = omap_sham_prepare_request;
1354         tctx->enginectx.op.unprepare_request = NULL;
1355
1356         return 0;
1357 }
1358
1359 static int omap_sham_cra_init(struct crypto_tfm *tfm)
1360 {
1361         return omap_sham_cra_init_alg(tfm, NULL);
1362 }
1363
1364 static int omap_sham_cra_sha1_init(struct crypto_tfm *tfm)
1365 {
1366         return omap_sham_cra_init_alg(tfm, "sha1");
1367 }
1368
1369 static int omap_sham_cra_sha224_init(struct crypto_tfm *tfm)
1370 {
1371         return omap_sham_cra_init_alg(tfm, "sha224");
1372 }
1373
1374 static int omap_sham_cra_sha256_init(struct crypto_tfm *tfm)
1375 {
1376         return omap_sham_cra_init_alg(tfm, "sha256");
1377 }
1378
1379 static int omap_sham_cra_md5_init(struct crypto_tfm *tfm)
1380 {
1381         return omap_sham_cra_init_alg(tfm, "md5");
1382 }
1383
1384 static int omap_sham_cra_sha384_init(struct crypto_tfm *tfm)
1385 {
1386         return omap_sham_cra_init_alg(tfm, "sha384");
1387 }
1388
1389 static int omap_sham_cra_sha512_init(struct crypto_tfm *tfm)
1390 {
1391         return omap_sham_cra_init_alg(tfm, "sha512");
1392 }
1393
1394 static void omap_sham_cra_exit(struct crypto_tfm *tfm)
1395 {
1396         struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
1397
1398         crypto_free_shash(tctx->fallback);
1399         tctx->fallback = NULL;
1400
1401         if (tctx->flags & BIT(FLAGS_HMAC)) {
1402                 struct omap_sham_hmac_ctx *bctx = tctx->base;
1403                 crypto_free_shash(bctx->shash);
1404         }
1405 }
1406
1407 static int omap_sham_export(struct ahash_request *req, void *out)
1408 {
1409         struct omap_sham_reqctx *rctx = ahash_request_ctx(req);
1410
1411         memcpy(out, rctx, sizeof(*rctx) + rctx->bufcnt);
1412
1413         return 0;
1414 }
1415
1416 static int omap_sham_import(struct ahash_request *req, const void *in)
1417 {
1418         struct omap_sham_reqctx *rctx = ahash_request_ctx(req);
1419         const struct omap_sham_reqctx *ctx_in = in;
1420
1421         memcpy(rctx, in, sizeof(*rctx) + ctx_in->bufcnt);
1422
1423         return 0;
1424 }
1425
1426 static struct ahash_alg algs_sha1_md5[] = {
1427 {
1428         .init           = omap_sham_init,
1429         .update         = omap_sham_update,
1430         .final          = omap_sham_final,
1431         .finup          = omap_sham_finup,
1432         .digest         = omap_sham_digest,
1433         .halg.digestsize        = SHA1_DIGEST_SIZE,
1434         .halg.base      = {
1435                 .cra_name               = "sha1",
1436                 .cra_driver_name        = "omap-sha1",
1437                 .cra_priority           = 400,
1438                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1439                                                 CRYPTO_ALG_ASYNC |
1440                                                 CRYPTO_ALG_NEED_FALLBACK,
1441                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1442                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1443                 .cra_alignmask          = OMAP_ALIGN_MASK,
1444                 .cra_module             = THIS_MODULE,
1445                 .cra_init               = omap_sham_cra_init,
1446                 .cra_exit               = omap_sham_cra_exit,
1447         }
1448 },
1449 {
1450         .init           = omap_sham_init,
1451         .update         = omap_sham_update,
1452         .final          = omap_sham_final,
1453         .finup          = omap_sham_finup,
1454         .digest         = omap_sham_digest,
1455         .halg.digestsize        = MD5_DIGEST_SIZE,
1456         .halg.base      = {
1457                 .cra_name               = "md5",
1458                 .cra_driver_name        = "omap-md5",
1459                 .cra_priority           = 400,
1460                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1461                                                 CRYPTO_ALG_ASYNC |
1462                                                 CRYPTO_ALG_NEED_FALLBACK,
1463                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1464                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1465                 .cra_alignmask          = OMAP_ALIGN_MASK,
1466                 .cra_module             = THIS_MODULE,
1467                 .cra_init               = omap_sham_cra_init,
1468                 .cra_exit               = omap_sham_cra_exit,
1469         }
1470 },
1471 {
1472         .init           = omap_sham_init,
1473         .update         = omap_sham_update,
1474         .final          = omap_sham_final,
1475         .finup          = omap_sham_finup,
1476         .digest         = omap_sham_digest,
1477         .setkey         = omap_sham_setkey,
1478         .halg.digestsize        = SHA1_DIGEST_SIZE,
1479         .halg.base      = {
1480                 .cra_name               = "hmac(sha1)",
1481                 .cra_driver_name        = "omap-hmac-sha1",
1482                 .cra_priority           = 400,
1483                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1484                                                 CRYPTO_ALG_ASYNC |
1485                                                 CRYPTO_ALG_NEED_FALLBACK,
1486                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1487                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1488                                         sizeof(struct omap_sham_hmac_ctx),
1489                 .cra_alignmask          = OMAP_ALIGN_MASK,
1490                 .cra_module             = THIS_MODULE,
1491                 .cra_init               = omap_sham_cra_sha1_init,
1492                 .cra_exit               = omap_sham_cra_exit,
1493         }
1494 },
1495 {
1496         .init           = omap_sham_init,
1497         .update         = omap_sham_update,
1498         .final          = omap_sham_final,
1499         .finup          = omap_sham_finup,
1500         .digest         = omap_sham_digest,
1501         .setkey         = omap_sham_setkey,
1502         .halg.digestsize        = MD5_DIGEST_SIZE,
1503         .halg.base      = {
1504                 .cra_name               = "hmac(md5)",
1505                 .cra_driver_name        = "omap-hmac-md5",
1506                 .cra_priority           = 400,
1507                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1508                                                 CRYPTO_ALG_ASYNC |
1509                                                 CRYPTO_ALG_NEED_FALLBACK,
1510                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1511                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1512                                         sizeof(struct omap_sham_hmac_ctx),
1513                 .cra_alignmask          = OMAP_ALIGN_MASK,
1514                 .cra_module             = THIS_MODULE,
1515                 .cra_init               = omap_sham_cra_md5_init,
1516                 .cra_exit               = omap_sham_cra_exit,
1517         }
1518 }
1519 };
1520
1521 /* OMAP4 has some algs in addition to what OMAP2 has */
1522 static struct ahash_alg algs_sha224_sha256[] = {
1523 {
1524         .init           = omap_sham_init,
1525         .update         = omap_sham_update,
1526         .final          = omap_sham_final,
1527         .finup          = omap_sham_finup,
1528         .digest         = omap_sham_digest,
1529         .halg.digestsize        = SHA224_DIGEST_SIZE,
1530         .halg.base      = {
1531                 .cra_name               = "sha224",
1532                 .cra_driver_name        = "omap-sha224",
1533                 .cra_priority           = 400,
1534                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1535                                                 CRYPTO_ALG_ASYNC |
1536                                                 CRYPTO_ALG_NEED_FALLBACK,
1537                 .cra_blocksize          = SHA224_BLOCK_SIZE,
1538                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1539                 .cra_alignmask          = OMAP_ALIGN_MASK,
1540                 .cra_module             = THIS_MODULE,
1541                 .cra_init               = omap_sham_cra_init,
1542                 .cra_exit               = omap_sham_cra_exit,
1543         }
1544 },
1545 {
1546         .init           = omap_sham_init,
1547         .update         = omap_sham_update,
1548         .final          = omap_sham_final,
1549         .finup          = omap_sham_finup,
1550         .digest         = omap_sham_digest,
1551         .halg.digestsize        = SHA256_DIGEST_SIZE,
1552         .halg.base      = {
1553                 .cra_name               = "sha256",
1554                 .cra_driver_name        = "omap-sha256",
1555                 .cra_priority           = 400,
1556                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1557                                                 CRYPTO_ALG_ASYNC |
1558                                                 CRYPTO_ALG_NEED_FALLBACK,
1559                 .cra_blocksize          = SHA256_BLOCK_SIZE,
1560                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1561                 .cra_alignmask          = OMAP_ALIGN_MASK,
1562                 .cra_module             = THIS_MODULE,
1563                 .cra_init               = omap_sham_cra_init,
1564                 .cra_exit               = omap_sham_cra_exit,
1565         }
1566 },
1567 {
1568         .init           = omap_sham_init,
1569         .update         = omap_sham_update,
1570         .final          = omap_sham_final,
1571         .finup          = omap_sham_finup,
1572         .digest         = omap_sham_digest,
1573         .setkey         = omap_sham_setkey,
1574         .halg.digestsize        = SHA224_DIGEST_SIZE,
1575         .halg.base      = {
1576                 .cra_name               = "hmac(sha224)",
1577                 .cra_driver_name        = "omap-hmac-sha224",
1578                 .cra_priority           = 400,
1579                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1580                                                 CRYPTO_ALG_ASYNC |
1581                                                 CRYPTO_ALG_NEED_FALLBACK,
1582                 .cra_blocksize          = SHA224_BLOCK_SIZE,
1583                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1584                                         sizeof(struct omap_sham_hmac_ctx),
1585                 .cra_alignmask          = OMAP_ALIGN_MASK,
1586                 .cra_module             = THIS_MODULE,
1587                 .cra_init               = omap_sham_cra_sha224_init,
1588                 .cra_exit               = omap_sham_cra_exit,
1589         }
1590 },
1591 {
1592         .init           = omap_sham_init,
1593         .update         = omap_sham_update,
1594         .final          = omap_sham_final,
1595         .finup          = omap_sham_finup,
1596         .digest         = omap_sham_digest,
1597         .setkey         = omap_sham_setkey,
1598         .halg.digestsize        = SHA256_DIGEST_SIZE,
1599         .halg.base      = {
1600                 .cra_name               = "hmac(sha256)",
1601                 .cra_driver_name        = "omap-hmac-sha256",
1602                 .cra_priority           = 400,
1603                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1604                                                 CRYPTO_ALG_ASYNC |
1605                                                 CRYPTO_ALG_NEED_FALLBACK,
1606                 .cra_blocksize          = SHA256_BLOCK_SIZE,
1607                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1608                                         sizeof(struct omap_sham_hmac_ctx),
1609                 .cra_alignmask          = OMAP_ALIGN_MASK,
1610                 .cra_module             = THIS_MODULE,
1611                 .cra_init               = omap_sham_cra_sha256_init,
1612                 .cra_exit               = omap_sham_cra_exit,
1613         }
1614 },
1615 };
1616
1617 static struct ahash_alg algs_sha384_sha512[] = {
1618 {
1619         .init           = omap_sham_init,
1620         .update         = omap_sham_update,
1621         .final          = omap_sham_final,
1622         .finup          = omap_sham_finup,
1623         .digest         = omap_sham_digest,
1624         .halg.digestsize        = SHA384_DIGEST_SIZE,
1625         .halg.base      = {
1626                 .cra_name               = "sha384",
1627                 .cra_driver_name        = "omap-sha384",
1628                 .cra_priority           = 400,
1629                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1630                                                 CRYPTO_ALG_ASYNC |
1631                                                 CRYPTO_ALG_NEED_FALLBACK,
1632                 .cra_blocksize          = SHA384_BLOCK_SIZE,
1633                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1634                 .cra_alignmask          = OMAP_ALIGN_MASK,
1635                 .cra_module             = THIS_MODULE,
1636                 .cra_init               = omap_sham_cra_init,
1637                 .cra_exit               = omap_sham_cra_exit,
1638         }
1639 },
1640 {
1641         .init           = omap_sham_init,
1642         .update         = omap_sham_update,
1643         .final          = omap_sham_final,
1644         .finup          = omap_sham_finup,
1645         .digest         = omap_sham_digest,
1646         .halg.digestsize        = SHA512_DIGEST_SIZE,
1647         .halg.base      = {
1648                 .cra_name               = "sha512",
1649                 .cra_driver_name        = "omap-sha512",
1650                 .cra_priority           = 400,
1651                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1652                                                 CRYPTO_ALG_ASYNC |
1653                                                 CRYPTO_ALG_NEED_FALLBACK,
1654                 .cra_blocksize          = SHA512_BLOCK_SIZE,
1655                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1656                 .cra_alignmask          = OMAP_ALIGN_MASK,
1657                 .cra_module             = THIS_MODULE,
1658                 .cra_init               = omap_sham_cra_init,
1659                 .cra_exit               = omap_sham_cra_exit,
1660         }
1661 },
1662 {
1663         .init           = omap_sham_init,
1664         .update         = omap_sham_update,
1665         .final          = omap_sham_final,
1666         .finup          = omap_sham_finup,
1667         .digest         = omap_sham_digest,
1668         .setkey         = omap_sham_setkey,
1669         .halg.digestsize        = SHA384_DIGEST_SIZE,
1670         .halg.base      = {
1671                 .cra_name               = "hmac(sha384)",
1672                 .cra_driver_name        = "omap-hmac-sha384",
1673                 .cra_priority           = 400,
1674                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1675                                                 CRYPTO_ALG_ASYNC |
1676                                                 CRYPTO_ALG_NEED_FALLBACK,
1677                 .cra_blocksize          = SHA384_BLOCK_SIZE,
1678                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1679                                         sizeof(struct omap_sham_hmac_ctx),
1680                 .cra_alignmask          = OMAP_ALIGN_MASK,
1681                 .cra_module             = THIS_MODULE,
1682                 .cra_init               = omap_sham_cra_sha384_init,
1683                 .cra_exit               = omap_sham_cra_exit,
1684         }
1685 },
1686 {
1687         .init           = omap_sham_init,
1688         .update         = omap_sham_update,
1689         .final          = omap_sham_final,
1690         .finup          = omap_sham_finup,
1691         .digest         = omap_sham_digest,
1692         .setkey         = omap_sham_setkey,
1693         .halg.digestsize        = SHA512_DIGEST_SIZE,
1694         .halg.base      = {
1695                 .cra_name               = "hmac(sha512)",
1696                 .cra_driver_name        = "omap-hmac-sha512",
1697                 .cra_priority           = 400,
1698                 .cra_flags              = CRYPTO_ALG_KERN_DRIVER_ONLY |
1699                                                 CRYPTO_ALG_ASYNC |
1700                                                 CRYPTO_ALG_NEED_FALLBACK,
1701                 .cra_blocksize          = SHA512_BLOCK_SIZE,
1702                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1703                                         sizeof(struct omap_sham_hmac_ctx),
1704                 .cra_alignmask          = OMAP_ALIGN_MASK,
1705                 .cra_module             = THIS_MODULE,
1706                 .cra_init               = omap_sham_cra_sha512_init,
1707                 .cra_exit               = omap_sham_cra_exit,
1708         }
1709 },
1710 };
1711
1712 static void omap_sham_done_task(unsigned long data)
1713 {
1714         struct omap_sham_dev *dd = (struct omap_sham_dev *)data;
1715         int err = 0;
1716
1717         dev_dbg(dd->dev, "%s: flags=%lx\n", __func__, dd->flags);
1718
1719         if (test_bit(FLAGS_CPU, &dd->flags)) {
1720                 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags))
1721                         goto finish;
1722         } else if (test_bit(FLAGS_DMA_READY, &dd->flags)) {
1723                 if (test_bit(FLAGS_DMA_ACTIVE, &dd->flags)) {
1724                         omap_sham_update_dma_stop(dd);
1725                         if (dd->err) {
1726                                 err = dd->err;
1727                                 goto finish;
1728                         }
1729                 }
1730                 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) {
1731                         /* hash or semi-hash ready */
1732                         clear_bit(FLAGS_DMA_READY, &dd->flags);
1733                         goto finish;
1734                 }
1735         }
1736
1737         return;
1738
1739 finish:
1740         dev_dbg(dd->dev, "update done: err: %d\n", err);
1741         /* finish curent request */
1742         omap_sham_finish_req(dd->req, err);
1743 }
1744
1745 static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd)
1746 {
1747         set_bit(FLAGS_OUTPUT_READY, &dd->flags);
1748         tasklet_schedule(&dd->done_task);
1749
1750         return IRQ_HANDLED;
1751 }
1752
1753 static irqreturn_t omap_sham_irq_omap2(int irq, void *dev_id)
1754 {
1755         struct omap_sham_dev *dd = dev_id;
1756
1757         if (unlikely(test_bit(FLAGS_FINAL, &dd->flags)))
1758                 /* final -> allow device to go to power-saving mode */
1759                 omap_sham_write_mask(dd, SHA_REG_CTRL, 0, SHA_REG_CTRL_LENGTH);
1760
1761         omap_sham_write_mask(dd, SHA_REG_CTRL, SHA_REG_CTRL_OUTPUT_READY,
1762                                  SHA_REG_CTRL_OUTPUT_READY);
1763         omap_sham_read(dd, SHA_REG_CTRL);
1764
1765         return omap_sham_irq_common(dd);
1766 }
1767
1768 static irqreturn_t omap_sham_irq_omap4(int irq, void *dev_id)
1769 {
1770         struct omap_sham_dev *dd = dev_id;
1771
1772         omap_sham_write_mask(dd, SHA_REG_MASK(dd), 0, SHA_REG_MASK_IT_EN);
1773
1774         return omap_sham_irq_common(dd);
1775 }
1776
1777 static struct omap_sham_algs_info omap_sham_algs_info_omap2[] = {
1778         {
1779                 .algs_list      = algs_sha1_md5,
1780                 .size           = ARRAY_SIZE(algs_sha1_md5),
1781         },
1782 };
1783
1784 static const struct omap_sham_pdata omap_sham_pdata_omap2 = {
1785         .algs_info      = omap_sham_algs_info_omap2,
1786         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap2),
1787         .flags          = BIT(FLAGS_BE32_SHA1),
1788         .digest_size    = SHA1_DIGEST_SIZE,
1789         .copy_hash      = omap_sham_copy_hash_omap2,
1790         .write_ctrl     = omap_sham_write_ctrl_omap2,
1791         .trigger        = omap_sham_trigger_omap2,
1792         .poll_irq       = omap_sham_poll_irq_omap2,
1793         .intr_hdlr      = omap_sham_irq_omap2,
1794         .idigest_ofs    = 0x00,
1795         .din_ofs        = 0x1c,
1796         .digcnt_ofs     = 0x14,
1797         .rev_ofs        = 0x5c,
1798         .mask_ofs       = 0x60,
1799         .sysstatus_ofs  = 0x64,
1800         .major_mask     = 0xf0,
1801         .major_shift    = 4,
1802         .minor_mask     = 0x0f,
1803         .minor_shift    = 0,
1804 };
1805
1806 #ifdef CONFIG_OF
1807 static struct omap_sham_algs_info omap_sham_algs_info_omap4[] = {
1808         {
1809                 .algs_list      = algs_sha1_md5,
1810                 .size           = ARRAY_SIZE(algs_sha1_md5),
1811         },
1812         {
1813                 .algs_list      = algs_sha224_sha256,
1814                 .size           = ARRAY_SIZE(algs_sha224_sha256),
1815         },
1816 };
1817
1818 static const struct omap_sham_pdata omap_sham_pdata_omap4 = {
1819         .algs_info      = omap_sham_algs_info_omap4,
1820         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap4),
1821         .flags          = BIT(FLAGS_AUTO_XOR),
1822         .digest_size    = SHA256_DIGEST_SIZE,
1823         .copy_hash      = omap_sham_copy_hash_omap4,
1824         .write_ctrl     = omap_sham_write_ctrl_omap4,
1825         .trigger        = omap_sham_trigger_omap4,
1826         .poll_irq       = omap_sham_poll_irq_omap4,
1827         .intr_hdlr      = omap_sham_irq_omap4,
1828         .idigest_ofs    = 0x020,
1829         .odigest_ofs    = 0x0,
1830         .din_ofs        = 0x080,
1831         .digcnt_ofs     = 0x040,
1832         .rev_ofs        = 0x100,
1833         .mask_ofs       = 0x110,
1834         .sysstatus_ofs  = 0x114,
1835         .mode_ofs       = 0x44,
1836         .length_ofs     = 0x48,
1837         .major_mask     = 0x0700,
1838         .major_shift    = 8,
1839         .minor_mask     = 0x003f,
1840         .minor_shift    = 0,
1841 };
1842
1843 static struct omap_sham_algs_info omap_sham_algs_info_omap5[] = {
1844         {
1845                 .algs_list      = algs_sha1_md5,
1846                 .size           = ARRAY_SIZE(algs_sha1_md5),
1847         },
1848         {
1849                 .algs_list      = algs_sha224_sha256,
1850                 .size           = ARRAY_SIZE(algs_sha224_sha256),
1851         },
1852         {
1853                 .algs_list      = algs_sha384_sha512,
1854                 .size           = ARRAY_SIZE(algs_sha384_sha512),
1855         },
1856 };
1857
1858 static const struct omap_sham_pdata omap_sham_pdata_omap5 = {
1859         .algs_info      = omap_sham_algs_info_omap5,
1860         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap5),
1861         .flags          = BIT(FLAGS_AUTO_XOR),
1862         .digest_size    = SHA512_DIGEST_SIZE,
1863         .copy_hash      = omap_sham_copy_hash_omap4,
1864         .write_ctrl     = omap_sham_write_ctrl_omap4,
1865         .trigger        = omap_sham_trigger_omap4,
1866         .poll_irq       = omap_sham_poll_irq_omap4,
1867         .intr_hdlr      = omap_sham_irq_omap4,
1868         .idigest_ofs    = 0x240,
1869         .odigest_ofs    = 0x200,
1870         .din_ofs        = 0x080,
1871         .digcnt_ofs     = 0x280,
1872         .rev_ofs        = 0x100,
1873         .mask_ofs       = 0x110,
1874         .sysstatus_ofs  = 0x114,
1875         .mode_ofs       = 0x284,
1876         .length_ofs     = 0x288,
1877         .major_mask     = 0x0700,
1878         .major_shift    = 8,
1879         .minor_mask     = 0x003f,
1880         .minor_shift    = 0,
1881 };
1882
1883 static const struct of_device_id omap_sham_of_match[] = {
1884         {
1885                 .compatible     = "ti,omap2-sham",
1886                 .data           = &omap_sham_pdata_omap2,
1887         },
1888         {
1889                 .compatible     = "ti,omap3-sham",
1890                 .data           = &omap_sham_pdata_omap2,
1891         },
1892         {
1893                 .compatible     = "ti,omap4-sham",
1894                 .data           = &omap_sham_pdata_omap4,
1895         },
1896         {
1897                 .compatible     = "ti,omap5-sham",
1898                 .data           = &omap_sham_pdata_omap5,
1899         },
1900         {},
1901 };
1902 MODULE_DEVICE_TABLE(of, omap_sham_of_match);
1903
1904 static int omap_sham_get_res_of(struct omap_sham_dev *dd,
1905                 struct device *dev, struct resource *res)
1906 {
1907         struct device_node *node = dev->of_node;
1908         int err = 0;
1909
1910         dd->pdata = of_device_get_match_data(dev);
1911         if (!dd->pdata) {
1912                 dev_err(dev, "no compatible OF match\n");
1913                 err = -EINVAL;
1914                 goto err;
1915         }
1916
1917         err = of_address_to_resource(node, 0, res);
1918         if (err < 0) {
1919                 dev_err(dev, "can't translate OF node address\n");
1920                 err = -EINVAL;
1921                 goto err;
1922         }
1923
1924         dd->irq = irq_of_parse_and_map(node, 0);
1925         if (!dd->irq) {
1926                 dev_err(dev, "can't translate OF irq value\n");
1927                 err = -EINVAL;
1928                 goto err;
1929         }
1930
1931 err:
1932         return err;
1933 }
1934 #else
1935 static const struct of_device_id omap_sham_of_match[] = {
1936         {},
1937 };
1938
1939 static int omap_sham_get_res_of(struct omap_sham_dev *dd,
1940                 struct device *dev, struct resource *res)
1941 {
1942         return -EINVAL;
1943 }
1944 #endif
1945
1946 static int omap_sham_get_res_pdev(struct omap_sham_dev *dd,
1947                 struct platform_device *pdev, struct resource *res)
1948 {
1949         struct device *dev = &pdev->dev;
1950         struct resource *r;
1951         int err = 0;
1952
1953         /* Get the base address */
1954         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1955         if (!r) {
1956                 dev_err(dev, "no MEM resource info\n");
1957                 err = -ENODEV;
1958                 goto err;
1959         }
1960         memcpy(res, r, sizeof(*res));
1961
1962         /* Get the IRQ */
1963         dd->irq = platform_get_irq(pdev, 0);
1964         if (dd->irq < 0) {
1965                 err = dd->irq;
1966                 goto err;
1967         }
1968
1969         /* Only OMAP2/3 can be non-DT */
1970         dd->pdata = &omap_sham_pdata_omap2;
1971
1972 err:
1973         return err;
1974 }
1975
1976 static ssize_t fallback_show(struct device *dev, struct device_attribute *attr,
1977                              char *buf)
1978 {
1979         struct omap_sham_dev *dd = dev_get_drvdata(dev);
1980
1981         return sprintf(buf, "%d\n", dd->fallback_sz);
1982 }
1983
1984 static ssize_t fallback_store(struct device *dev, struct device_attribute *attr,
1985                               const char *buf, size_t size)
1986 {
1987         struct omap_sham_dev *dd = dev_get_drvdata(dev);
1988         ssize_t status;
1989         long value;
1990
1991         status = kstrtol(buf, 0, &value);
1992         if (status)
1993                 return status;
1994
1995         /* HW accelerator only works with buffers > 9 */
1996         if (value < 9) {
1997                 dev_err(dev, "minimum fallback size 9\n");
1998                 return -EINVAL;
1999         }
2000
2001         dd->fallback_sz = value;
2002
2003         return size;
2004 }
2005
2006 static ssize_t queue_len_show(struct device *dev, struct device_attribute *attr,
2007                               char *buf)
2008 {
2009         struct omap_sham_dev *dd = dev_get_drvdata(dev);
2010
2011         return sprintf(buf, "%d\n", dd->queue.max_qlen);
2012 }
2013
2014 static ssize_t queue_len_store(struct device *dev,
2015                                struct device_attribute *attr, const char *buf,
2016                                size_t size)
2017 {
2018         struct omap_sham_dev *dd = dev_get_drvdata(dev);
2019         ssize_t status;
2020         long value;
2021
2022         status = kstrtol(buf, 0, &value);
2023         if (status)
2024                 return status;
2025
2026         if (value < 1)
2027                 return -EINVAL;
2028
2029         /*
2030          * Changing the queue size in fly is safe, if size becomes smaller
2031          * than current size, it will just not accept new entries until
2032          * it has shrank enough.
2033          */
2034         dd->queue.max_qlen = value;
2035
2036         return size;
2037 }
2038
2039 static DEVICE_ATTR_RW(queue_len);
2040 static DEVICE_ATTR_RW(fallback);
2041
2042 static struct attribute *omap_sham_attrs[] = {
2043         &dev_attr_queue_len.attr,
2044         &dev_attr_fallback.attr,
2045         NULL,
2046 };
2047
2048 static struct attribute_group omap_sham_attr_group = {
2049         .attrs = omap_sham_attrs,
2050 };
2051
2052 static int omap_sham_probe(struct platform_device *pdev)
2053 {
2054         struct omap_sham_dev *dd;
2055         struct device *dev = &pdev->dev;
2056         struct resource res;
2057         dma_cap_mask_t mask;
2058         int err, i, j;
2059         u32 rev;
2060
2061         dd = devm_kzalloc(dev, sizeof(struct omap_sham_dev), GFP_KERNEL);
2062         if (dd == NULL) {
2063                 dev_err(dev, "unable to alloc data struct.\n");
2064                 err = -ENOMEM;
2065                 goto data_err;
2066         }
2067         dd->dev = dev;
2068         platform_set_drvdata(pdev, dd);
2069
2070         INIT_LIST_HEAD(&dd->list);
2071         tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd);
2072         crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH);
2073
2074         err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) :
2075                                omap_sham_get_res_pdev(dd, pdev, &res);
2076         if (err)
2077                 goto data_err;
2078
2079         dd->io_base = devm_ioremap_resource(dev, &res);
2080         if (IS_ERR(dd->io_base)) {
2081                 err = PTR_ERR(dd->io_base);
2082                 goto data_err;
2083         }
2084         dd->phys_base = res.start;
2085
2086         err = devm_request_irq(dev, dd->irq, dd->pdata->intr_hdlr,
2087                                IRQF_TRIGGER_NONE, dev_name(dev), dd);
2088         if (err) {
2089                 dev_err(dev, "unable to request irq %d, err = %d\n",
2090                         dd->irq, err);
2091                 goto data_err;
2092         }
2093
2094         dma_cap_zero(mask);
2095         dma_cap_set(DMA_SLAVE, mask);
2096
2097         dd->dma_lch = dma_request_chan(dev, "rx");
2098         if (IS_ERR(dd->dma_lch)) {
2099                 err = PTR_ERR(dd->dma_lch);
2100                 if (err == -EPROBE_DEFER)
2101                         goto data_err;
2102
2103                 dd->polling_mode = 1;
2104                 dev_dbg(dev, "using polling mode instead of dma\n");
2105         }
2106
2107         dd->flags |= dd->pdata->flags;
2108         sham.flags |= dd->pdata->flags;
2109
2110         pm_runtime_use_autosuspend(dev);
2111         pm_runtime_set_autosuspend_delay(dev, DEFAULT_AUTOSUSPEND_DELAY);
2112
2113         dd->fallback_sz = OMAP_SHA_DMA_THRESHOLD;
2114
2115         pm_runtime_enable(dev);
2116
2117         err = pm_runtime_get_sync(dev);
2118         if (err < 0) {
2119                 dev_err(dev, "failed to get sync: %d\n", err);
2120                 goto err_pm;
2121         }
2122
2123         rev = omap_sham_read(dd, SHA_REG_REV(dd));
2124         pm_runtime_put_sync(&pdev->dev);
2125
2126         dev_info(dev, "hw accel on OMAP rev %u.%u\n",
2127                 (rev & dd->pdata->major_mask) >> dd->pdata->major_shift,
2128                 (rev & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
2129
2130         spin_lock_bh(&sham.lock);
2131         list_add_tail(&dd->list, &sham.dev_list);
2132         spin_unlock_bh(&sham.lock);
2133
2134         dd->engine = crypto_engine_alloc_init(dev, 1);
2135         if (!dd->engine) {
2136                 err = -ENOMEM;
2137                 goto err_engine;
2138         }
2139
2140         err = crypto_engine_start(dd->engine);
2141         if (err)
2142                 goto err_engine_start;
2143
2144         for (i = 0; i < dd->pdata->algs_info_size; i++) {
2145                 if (dd->pdata->algs_info[i].registered)
2146                         break;
2147
2148                 for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
2149                         struct ahash_alg *alg;
2150
2151                         alg = &dd->pdata->algs_info[i].algs_list[j];
2152                         alg->export = omap_sham_export;
2153                         alg->import = omap_sham_import;
2154                         alg->halg.statesize = sizeof(struct omap_sham_reqctx) +
2155                                               BUFLEN;
2156                         err = crypto_register_ahash(alg);
2157                         if (err)
2158                                 goto err_algs;
2159
2160                         dd->pdata->algs_info[i].registered++;
2161                 }
2162         }
2163
2164         err = sysfs_create_group(&dev->kobj, &omap_sham_attr_group);
2165         if (err) {
2166                 dev_err(dev, "could not create sysfs device attrs\n");
2167                 goto err_algs;
2168         }
2169
2170         return 0;
2171
2172 err_algs:
2173         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
2174                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
2175                         crypto_unregister_ahash(
2176                                         &dd->pdata->algs_info[i].algs_list[j]);
2177 err_engine_start:
2178         crypto_engine_exit(dd->engine);
2179 err_engine:
2180         spin_lock_bh(&sham.lock);
2181         list_del(&dd->list);
2182         spin_unlock_bh(&sham.lock);
2183 err_pm:
2184         pm_runtime_dont_use_autosuspend(dev);
2185         pm_runtime_disable(dev);
2186         if (!dd->polling_mode)
2187                 dma_release_channel(dd->dma_lch);
2188 data_err:
2189         dev_err(dev, "initialization failed.\n");
2190
2191         return err;
2192 }
2193
2194 static int omap_sham_remove(struct platform_device *pdev)
2195 {
2196         struct omap_sham_dev *dd;
2197         int i, j;
2198
2199         dd = platform_get_drvdata(pdev);
2200         if (!dd)
2201                 return -ENODEV;
2202         spin_lock_bh(&sham.lock);
2203         list_del(&dd->list);
2204         spin_unlock_bh(&sham.lock);
2205         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
2206                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) {
2207                         crypto_unregister_ahash(
2208                                         &dd->pdata->algs_info[i].algs_list[j]);
2209                         dd->pdata->algs_info[i].registered--;
2210                 }
2211         tasklet_kill(&dd->done_task);
2212         pm_runtime_dont_use_autosuspend(&pdev->dev);
2213         pm_runtime_disable(&pdev->dev);
2214
2215         if (!dd->polling_mode)
2216                 dma_release_channel(dd->dma_lch);
2217
2218         sysfs_remove_group(&dd->dev->kobj, &omap_sham_attr_group);
2219
2220         return 0;
2221 }
2222
2223 static struct platform_driver omap_sham_driver = {
2224         .probe  = omap_sham_probe,
2225         .remove = omap_sham_remove,
2226         .driver = {
2227                 .name   = "omap-sham",
2228                 .of_match_table = omap_sham_of_match,
2229         },
2230 };
2231
2232 module_platform_driver(omap_sham_driver);
2233
2234 MODULE_DESCRIPTION("OMAP SHA1/MD5 hw acceleration support.");
2235 MODULE_LICENSE("GPL v2");
2236 MODULE_AUTHOR("Dmitry Kasatkin");
2237 MODULE_ALIAS("platform:omap-sham");