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/omap-dma.h>
  33 #include <linux/pm_runtime.h>
  34 #include <linux/of.h>
  35 #include <linux/of_device.h>
  36 #include <linux/of_address.h>
  37 #include <linux/of_irq.h>
  38 #include <linux/delay.h>
  39 #include <linux/crypto.h>
  40 #include <linux/cryptohash.h>
  41 #include <crypto/scatterwalk.h>
  42 #include <crypto/algapi.h>
  43 #include <crypto/sha.h>
  44 #include <crypto/hash.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 /* mostly device flags */
 105 #define FLAGS_BUSY              0
 106 #define FLAGS_FINAL             1
 107 #define FLAGS_DMA_ACTIVE        2
 108 #define FLAGS_OUTPUT_READY      3
 109 #define FLAGS_INIT              4
 110 #define FLAGS_CPU               5
 111 #define FLAGS_DMA_READY         6
 112 #define FLAGS_AUTO_XOR          7
 113 #define FLAGS_BE32_SHA1         8
 114 /* context flags */
 115 #define FLAGS_FINUP             16
 116 #define FLAGS_SG                17
 117
 118 #define FLAGS_MODE_SHIFT        18
 119 #define FLAGS_MODE_MASK         (SHA_REG_MODE_ALGO_MASK << FLAGS_MODE_SHIFT)
 120 #define FLAGS_MODE_MD5          (SHA_REG_MODE_ALGO_MD5_128 << FLAGS_MODE_SHIFT)
 121 #define FLAGS_MODE_SHA1         (SHA_REG_MODE_ALGO_SHA1_160 << FLAGS_MODE_SHIFT)
 122 #define FLAGS_MODE_SHA224       (SHA_REG_MODE_ALGO_SHA2_224 << FLAGS_MODE_SHIFT)
 123 #define FLAGS_MODE_SHA256       (SHA_REG_MODE_ALGO_SHA2_256 << FLAGS_MODE_SHIFT)
 124 #define FLAGS_MODE_SHA384       (SHA_REG_MODE_ALGO_SHA2_384 << FLAGS_MODE_SHIFT)
 125 #define FLAGS_MODE_SHA512       (SHA_REG_MODE_ALGO_SHA2_512 << FLAGS_MODE_SHIFT)
 126
 127 #define FLAGS_HMAC              21
 128 #define FLAGS_ERROR             22
 129
 130 #define OP_UPDATE               1
 131 #define OP_FINAL                2
 132
 133 #define OMAP_ALIGN_MASK         (sizeof(u32)-1)
 134 #define OMAP_ALIGNED            __attribute__((aligned(sizeof(u32))))
 135
 136 #define BUFLEN                  PAGE_SIZE
 137
 138 struct omap_sham_dev;
 139
 140 struct omap_sham_reqctx {
 141         struct omap_sham_dev    *dd;
 142         unsigned long           flags;
 143         unsigned long           op;
 144
 145         u8                      digest[SHA512_DIGEST_SIZE] OMAP_ALIGNED;
 146         size_t                  digcnt;
 147         size_t                  bufcnt;
 148         size_t                  buflen;
 149         dma_addr_t              dma_addr;
 150
 151         /* walk state */
 152         struct scatterlist      *sg;
 153         struct scatterlist      sgl;
 154         unsigned int            offset; /* offset in current sg */
 155         unsigned int            total;  /* total request */
 156
 157         u8                      buffer[0] OMAP_ALIGNED;
 158 };
 159
 160 struct omap_sham_hmac_ctx {
 161         struct crypto_shash     *shash;
 162         u8                      ipad[SHA512_BLOCK_SIZE] OMAP_ALIGNED;
 163         u8                      opad[SHA512_BLOCK_SIZE] OMAP_ALIGNED;
 164 };
 165
 166 struct omap_sham_ctx {
 167         struct omap_sham_dev    *dd;
 168
 169         unsigned long           flags;
 170
 171         /* fallback stuff */
 172         struct crypto_shash     *fallback;
 173
 174         struct omap_sham_hmac_ctx base[0];
 175 };
 176
 177 #define OMAP_SHAM_QUEUE_LENGTH  1
 178
 179 struct omap_sham_algs_info {
 180         struct ahash_alg        *algs_list;
 181         unsigned int            size;
 182         unsigned int            registered;
 183 };
 184
 185 struct omap_sham_pdata {
 186         struct omap_sham_algs_info      *algs_info;
 187         unsigned int    algs_info_size;
 188         unsigned long   flags;
 189         int             digest_size;
 190
 191         void            (*copy_hash)(struct ahash_request *req, int out);
 192         void            (*write_ctrl)(struct omap_sham_dev *dd, size_t length,
 193                                       int final, int dma);
 194         void            (*trigger)(struct omap_sham_dev *dd, size_t length);
 195         int             (*poll_irq)(struct omap_sham_dev *dd);
 196         irqreturn_t     (*intr_hdlr)(int irq, void *dev_id);
 197
 198         u32             odigest_ofs;
 199         u32             idigest_ofs;
 200         u32             din_ofs;
 201         u32             digcnt_ofs;
 202         u32             rev_ofs;
 203         u32             mask_ofs;
 204         u32             sysstatus_ofs;
 205         u32             mode_ofs;
 206         u32             length_ofs;
 207
 208         u32             major_mask;
 209         u32             major_shift;
 210         u32             minor_mask;
 211         u32             minor_shift;
 212 };
 213
 214 struct omap_sham_dev {
 215         struct list_head        list;
 216         unsigned long           phys_base;
 217         struct device           *dev;
 218         void __iomem            *io_base;
 219         int                     irq;
 220         spinlock_t              lock;
 221         int                     err;
 222         unsigned int            dma;
 223         struct dma_chan         *dma_lch;
 224         struct tasklet_struct   done_task;
 225         u8                      polling_mode;
 226
 227         unsigned long           flags;
 228         struct crypto_queue     queue;
 229         struct ahash_request    *req;
 230
 231         const struct omap_sham_pdata    *pdata;
 232 };
 233
 234 struct omap_sham_drv {
 235         struct list_head        dev_list;
 236         spinlock_t              lock;
 237         unsigned long           flags;
 238 };
 239
 240 static struct omap_sham_drv sham = {
 241         .dev_list = LIST_HEAD_INIT(sham.dev_list),
 242         .lock = __SPIN_LOCK_UNLOCKED(sham.lock),
 243 };
 244
 245 static inline u32 omap_sham_read(struct omap_sham_dev *dd, u32 offset)
 246 {
 247         return __raw_readl(dd->io_base + offset);
 248 }
 249
 250 static inline void omap_sham_write(struct omap_sham_dev *dd,
 251                                         u32 offset, u32 value)
 252 {
 253         __raw_writel(value, dd->io_base + offset);
 254 }
 255
 256 static inline void omap_sham_write_mask(struct omap_sham_dev *dd, u32 address,
 257                                         u32 value, u32 mask)
 258 {
 259         u32 val;
 260
 261         val = omap_sham_read(dd, address);
 262         val &= ~mask;
 263         val |= value;
 264         omap_sham_write(dd, address, val);
 265 }
 266
 267 static inline int omap_sham_wait(struct omap_sham_dev *dd, u32 offset, u32 bit)
 268 {
 269         unsigned long timeout = jiffies + DEFAULT_TIMEOUT_INTERVAL;
 270
 271         while (!(omap_sham_read(dd, offset) & bit)) {
 272                 if (time_is_before_jiffies(timeout))
 273                         return -ETIMEDOUT;
 274         }
 275
 276         return 0;
 277 }
 278
 279 static void omap_sham_copy_hash_omap2(struct ahash_request *req, int out)
 280 {
 281         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 282         struct omap_sham_dev *dd = ctx->dd;
 283         u32 *hash = (u32 *)ctx->digest;
 284         int i;
 285
 286         for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) {
 287                 if (out)
 288                         hash[i] = omap_sham_read(dd, SHA_REG_IDIGEST(dd, i));
 289                 else
 290                         omap_sham_write(dd, SHA_REG_IDIGEST(dd, i), hash[i]);
 291         }
 292 }
 293
 294 static void omap_sham_copy_hash_omap4(struct ahash_request *req, int out)
 295 {
 296         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 297         struct omap_sham_dev *dd = ctx->dd;
 298         int i;
 299
 300         if (ctx->flags & BIT(FLAGS_HMAC)) {
 301                 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
 302                 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
 303                 struct omap_sham_hmac_ctx *bctx = tctx->base;
 304                 u32 *opad = (u32 *)bctx->opad;
 305
 306                 for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) {
 307                         if (out)
 308                                 opad[i] = omap_sham_read(dd,
 309                                                 SHA_REG_ODIGEST(dd, i));
 310                         else
 311                                 omap_sham_write(dd, SHA_REG_ODIGEST(dd, i),
 312                                                 opad[i]);
 313                 }
 314         }
 315
 316         omap_sham_copy_hash_omap2(req, out);
 317 }
 318
 319 static void omap_sham_copy_ready_hash(struct ahash_request *req)
 320 {
 321         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 322         u32 *in = (u32 *)ctx->digest;
 323         u32 *hash = (u32 *)req->result;
 324         int i, d, big_endian = 0;
 325
 326         if (!hash)
 327                 return;
 328
 329         switch (ctx->flags & FLAGS_MODE_MASK) {
 330         case FLAGS_MODE_MD5:
 331                 d = MD5_DIGEST_SIZE / sizeof(u32);
 332                 break;
 333         case FLAGS_MODE_SHA1:
 334                 /* OMAP2 SHA1 is big endian */
 335                 if (test_bit(FLAGS_BE32_SHA1, &ctx->dd->flags))
 336                         big_endian = 1;
 337                 d = SHA1_DIGEST_SIZE / sizeof(u32);
 338                 break;
 339         case FLAGS_MODE_SHA224:
 340                 d = SHA224_DIGEST_SIZE / sizeof(u32);
 341                 break;
 342         case FLAGS_MODE_SHA256:
 343                 d = SHA256_DIGEST_SIZE / sizeof(u32);
 344                 break;
 345         case FLAGS_MODE_SHA384:
 346                 d = SHA384_DIGEST_SIZE / sizeof(u32);
 347                 break;
 348         case FLAGS_MODE_SHA512:
 349                 d = SHA512_DIGEST_SIZE / sizeof(u32);
 350                 break;
 351         default:
 352                 d = 0;
 353         }
 354
 355         if (big_endian)
 356                 for (i = 0; i < d; i++)
 357                         hash[i] = be32_to_cpu(in[i]);
 358         else
 359                 for (i = 0; i < d; i++)
 360                         hash[i] = le32_to_cpu(in[i]);
 361 }
 362
 363 static int omap_sham_hw_init(struct omap_sham_dev *dd)
 364 {
 365         pm_runtime_get_sync(dd->dev);
 366
 367         if (!test_bit(FLAGS_INIT, &dd->flags)) {
 368                 set_bit(FLAGS_INIT, &dd->flags);
 369                 dd->err = 0;
 370         }
 371
 372         return 0;
 373 }
 374
 375 static void omap_sham_write_ctrl_omap2(struct omap_sham_dev *dd, size_t length,
 376                                  int final, int dma)
 377 {
 378         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 379         u32 val = length << 5, mask;
 380
 381         if (likely(ctx->digcnt))
 382                 omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt);
 383
 384         omap_sham_write_mask(dd, SHA_REG_MASK(dd),
 385                 SHA_REG_MASK_IT_EN | (dma ? SHA_REG_MASK_DMA_EN : 0),
 386                 SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
 387         /*
 388          * Setting ALGO_CONST only for the first iteration
 389          * and CLOSE_HASH only for the last one.
 390          */
 391         if ((ctx->flags & FLAGS_MODE_MASK) == FLAGS_MODE_SHA1)
 392                 val |= SHA_REG_CTRL_ALGO;
 393         if (!ctx->digcnt)
 394                 val |= SHA_REG_CTRL_ALGO_CONST;
 395         if (final)
 396                 val |= SHA_REG_CTRL_CLOSE_HASH;
 397
 398         mask = SHA_REG_CTRL_ALGO_CONST | SHA_REG_CTRL_CLOSE_HASH |
 399                         SHA_REG_CTRL_ALGO | SHA_REG_CTRL_LENGTH;
 400
 401         omap_sham_write_mask(dd, SHA_REG_CTRL, val, mask);
 402 }
 403
 404 static void omap_sham_trigger_omap2(struct omap_sham_dev *dd, size_t length)
 405 {
 406 }
 407
 408 static int omap_sham_poll_irq_omap2(struct omap_sham_dev *dd)
 409 {
 410         return omap_sham_wait(dd, SHA_REG_CTRL, SHA_REG_CTRL_INPUT_READY);
 411 }
 412
 413 static int get_block_size(struct omap_sham_reqctx *ctx)
 414 {
 415         int d;
 416
 417         switch (ctx->flags & FLAGS_MODE_MASK) {
 418         case FLAGS_MODE_MD5:
 419         case FLAGS_MODE_SHA1:
 420                 d = SHA1_BLOCK_SIZE;
 421                 break;
 422         case FLAGS_MODE_SHA224:
 423         case FLAGS_MODE_SHA256:
 424                 d = SHA256_BLOCK_SIZE;
 425                 break;
 426         case FLAGS_MODE_SHA384:
 427         case FLAGS_MODE_SHA512:
 428                 d = SHA512_BLOCK_SIZE;
 429                 break;
 430         default:
 431                 d = 0;
 432         }
 433
 434         return d;
 435 }
 436
 437 static void omap_sham_write_n(struct omap_sham_dev *dd, u32 offset,
 438                                     u32 *value, int count)
 439 {
 440         for (; count--; value++, offset += 4)
 441                 omap_sham_write(dd, offset, *value);
 442 }
 443
 444 static void omap_sham_write_ctrl_omap4(struct omap_sham_dev *dd, size_t length,
 445                                  int final, int dma)
 446 {
 447         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 448         u32 val, mask;
 449
 450         /*
 451          * Setting ALGO_CONST only for the first iteration and
 452          * CLOSE_HASH only for the last one. Note that flags mode bits
 453          * correspond to algorithm encoding in mode register.
 454          */
 455         val = (ctx->flags & FLAGS_MODE_MASK) >> (FLAGS_MODE_SHIFT);
 456         if (!ctx->digcnt) {
 457                 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
 458                 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
 459                 struct omap_sham_hmac_ctx *bctx = tctx->base;
 460                 int bs, nr_dr;
 461
 462                 val |= SHA_REG_MODE_ALGO_CONSTANT;
 463
 464                 if (ctx->flags & BIT(FLAGS_HMAC)) {
 465                         bs = get_block_size(ctx);
 466                         nr_dr = bs / (2 * sizeof(u32));
 467                         val |= SHA_REG_MODE_HMAC_KEY_PROC;
 468                         omap_sham_write_n(dd, SHA_REG_ODIGEST(dd, 0),
 469                                           (u32 *)bctx->ipad, nr_dr);
 470                         omap_sham_write_n(dd, SHA_REG_IDIGEST(dd, 0),
 471                                           (u32 *)bctx->ipad + nr_dr, nr_dr);
 472                         ctx->digcnt += bs;
 473                 }
 474         }
 475
 476         if (final) {
 477                 val |= SHA_REG_MODE_CLOSE_HASH;
 478
 479                 if (ctx->flags & BIT(FLAGS_HMAC))
 480                         val |= SHA_REG_MODE_HMAC_OUTER_HASH;
 481         }
 482
 483         mask = SHA_REG_MODE_ALGO_CONSTANT | SHA_REG_MODE_CLOSE_HASH |
 484                SHA_REG_MODE_ALGO_MASK | SHA_REG_MODE_HMAC_OUTER_HASH |
 485                SHA_REG_MODE_HMAC_KEY_PROC;
 486
 487         dev_dbg(dd->dev, "ctrl: %08x, flags: %08lx\n", val, ctx->flags);
 488         omap_sham_write_mask(dd, SHA_REG_MODE(dd), val, mask);
 489         omap_sham_write(dd, SHA_REG_IRQENA, SHA_REG_IRQENA_OUTPUT_RDY);
 490         omap_sham_write_mask(dd, SHA_REG_MASK(dd),
 491                              SHA_REG_MASK_IT_EN |
 492                                      (dma ? SHA_REG_MASK_DMA_EN : 0),
 493                              SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
 494 }
 495
 496 static void omap_sham_trigger_omap4(struct omap_sham_dev *dd, size_t length)
 497 {
 498         omap_sham_write(dd, SHA_REG_LENGTH(dd), length);
 499 }
 500
 501 static int omap_sham_poll_irq_omap4(struct omap_sham_dev *dd)
 502 {
 503         return omap_sham_wait(dd, SHA_REG_IRQSTATUS,
 504                               SHA_REG_IRQSTATUS_INPUT_RDY);
 505 }
 506
 507 static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, const u8 *buf,
 508                               size_t length, int final)
 509 {
 510         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 511         int count, len32, bs32, offset = 0;
 512         const u32 *buffer = (const u32 *)buf;
 513
 514         dev_dbg(dd->dev, "xmit_cpu: digcnt: %d, length: %d, 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
 523         if (final)
 524                 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
 525
 526         set_bit(FLAGS_CPU, &dd->flags);
 527
 528         len32 = DIV_ROUND_UP(length, sizeof(u32));
 529         bs32 = get_block_size(ctx) / sizeof(u32);
 530
 531         while (len32) {
 532                 if (dd->pdata->poll_irq(dd))
 533                         return -ETIMEDOUT;
 534
 535                 for (count = 0; count < min(len32, bs32); count++, offset++)
 536                         omap_sham_write(dd, SHA_REG_DIN(dd, count),
 537                                         buffer[offset]);
 538                 len32 -= min(len32, bs32);
 539         }
 540
 541         return -EINPROGRESS;
 542 }
 543
 544 static void omap_sham_dma_callback(void *param)
 545 {
 546         struct omap_sham_dev *dd = param;
 547
 548         set_bit(FLAGS_DMA_READY, &dd->flags);
 549         tasklet_schedule(&dd->done_task);
 550 }
 551
 552 static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr,
 553                               size_t length, int final, int is_sg)
 554 {
 555         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 556         struct dma_async_tx_descriptor *tx;
 557         struct dma_slave_config cfg;
 558         int len32, ret, dma_min = get_block_size(ctx);
 559
 560         dev_dbg(dd->dev, "xmit_dma: digcnt: %d, length: %d, final: %d\n",
 561                                                 ctx->digcnt, length, final);
 562
 563         memset(&cfg, 0, sizeof(cfg));
 564
 565         cfg.dst_addr = dd->phys_base + SHA_REG_DIN(dd, 0);
 566         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 567         cfg.dst_maxburst = dma_min / DMA_SLAVE_BUSWIDTH_4_BYTES;
 568
 569         ret = dmaengine_slave_config(dd->dma_lch, &cfg);
 570         if (ret) {
 571                 pr_err("omap-sham: can't configure dmaengine slave: %d\n", ret);
 572                 return ret;
 573         }
 574
 575         len32 = DIV_ROUND_UP(length, dma_min) * dma_min;
 576
 577         if (is_sg) {
 578                 /*
 579                  * The SG entry passed in may not have the 'length' member
 580                  * set correctly so use a local SG entry (sgl) with the
 581                  * proper value for 'length' instead.  If this is not done,
 582                  * the dmaengine may try to DMA the incorrect amount of data.
 583                  */
 584                 sg_init_table(&ctx->sgl, 1);
 585                 ctx->sgl.page_link = ctx->sg->page_link;
 586                 ctx->sgl.offset = ctx->sg->offset;
 587                 sg_dma_len(&ctx->sgl) = len32;
 588                 sg_dma_address(&ctx->sgl) = sg_dma_address(ctx->sg);
 589
 590                 tx = dmaengine_prep_slave_sg(dd->dma_lch, &ctx->sgl, 1,
 591                         DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 592         } else {
 593                 tx = dmaengine_prep_slave_single(dd->dma_lch, dma_addr, len32,
 594                         DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 595         }
 596
 597         if (!tx) {
 598                 dev_err(dd->dev, "prep_slave_sg/single() failed\n");
 599                 return -EINVAL;
 600         }
 601
 602         tx->callback = omap_sham_dma_callback;
 603         tx->callback_param = dd;
 604
 605         dd->pdata->write_ctrl(dd, length, final, 1);
 606
 607         ctx->digcnt += length;
 608
 609         if (final)
 610                 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
 611
 612         set_bit(FLAGS_DMA_ACTIVE, &dd->flags);
 613
 614         dmaengine_submit(tx);
 615         dma_async_issue_pending(dd->dma_lch);
 616
 617         dd->pdata->trigger(dd, length);
 618
 619         return -EINPROGRESS;
 620 }
 621
 622 static size_t omap_sham_append_buffer(struct omap_sham_reqctx *ctx,
 623                                 const u8 *data, size_t length)
 624 {
 625         size_t count = min(length, ctx->buflen - ctx->bufcnt);
 626
 627         count = min(count, ctx->total);
 628         if (count <= 0)
 629                 return 0;
 630         memcpy(ctx->buffer + ctx->bufcnt, data, count);
 631         ctx->bufcnt += count;
 632
 633         return count;
 634 }
 635
 636 static size_t omap_sham_append_sg(struct omap_sham_reqctx *ctx)
 637 {
 638         size_t count;
 639         const u8 *vaddr;
 640
 641         while (ctx->sg) {
 642                 vaddr = kmap_atomic(sg_page(ctx->sg));
 643
 644                 count = omap_sham_append_buffer(ctx,
 645                                 vaddr + ctx->offset,
 646                                 ctx->sg->length - ctx->offset);
 647
 648                 kunmap_atomic((void *)vaddr);
 649
 650                 if (!count)
 651                         break;
 652                 ctx->offset += count;
 653                 ctx->total -= count;
 654                 if (ctx->offset == ctx->sg->length) {
 655                         ctx->sg = sg_next(ctx->sg);
 656                         if (ctx->sg)
 657                                 ctx->offset = 0;
 658                         else
 659                                 ctx->total = 0;
 660                 }
 661         }
 662
 663         return 0;
 664 }
 665
 666 static int omap_sham_xmit_dma_map(struct omap_sham_dev *dd,
 667                                         struct omap_sham_reqctx *ctx,
 668                                         size_t length, int final)
 669 {
 670         int ret;
 671
 672         ctx->dma_addr = dma_map_single(dd->dev, ctx->buffer, ctx->buflen,
 673                                        DMA_TO_DEVICE);
 674         if (dma_mapping_error(dd->dev, ctx->dma_addr)) {
 675                 dev_err(dd->dev, "dma %u bytes error\n", ctx->buflen);
 676                 return -EINVAL;
 677         }
 678
 679         ctx->flags &= ~BIT(FLAGS_SG);
 680
 681         ret = omap_sham_xmit_dma(dd, ctx->dma_addr, length, final, 0);
 682         if (ret != -EINPROGRESS)
 683                 dma_unmap_single(dd->dev, ctx->dma_addr, ctx->buflen,
 684                                  DMA_TO_DEVICE);
 685
 686         return ret;
 687 }
 688
 689 static int omap_sham_update_dma_slow(struct omap_sham_dev *dd)
 690 {
 691         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 692         unsigned int final;
 693         size_t count;
 694
 695         omap_sham_append_sg(ctx);
 696
 697         final = (ctx->flags & BIT(FLAGS_FINUP)) && !ctx->total;
 698
 699         dev_dbg(dd->dev, "slow: bufcnt: %u, digcnt: %d, final: %d\n",
 700                                          ctx->bufcnt, ctx->digcnt, final);
 701
 702         if (final || (ctx->bufcnt == ctx->buflen && ctx->total)) {
 703                 count = ctx->bufcnt;
 704                 ctx->bufcnt = 0;
 705                 return omap_sham_xmit_dma_map(dd, ctx, count, final);
 706         }
 707
 708         return 0;
 709 }
 710
 711 /* Start address alignment */
 712 #define SG_AA(sg)       (IS_ALIGNED(sg->offset, sizeof(u32)))
 713 /* SHA1 block size alignment */
 714 #define SG_SA(sg, bs)   (IS_ALIGNED(sg->length, bs))
 715
 716 static int omap_sham_update_dma_start(struct omap_sham_dev *dd)
 717 {
 718         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 719         unsigned int length, final, tail;
 720         struct scatterlist *sg;
 721         int ret, bs;
 722
 723         if (!ctx->total)
 724                 return 0;
 725
 726         if (ctx->bufcnt || ctx->offset)
 727                 return omap_sham_update_dma_slow(dd);
 728
 729         /*
 730          * Don't use the sg interface when the transfer size is less
 731          * than the number of elements in a DMA frame.  Otherwise,
 732          * the dmaengine infrastructure will calculate that it needs
 733          * to transfer 0 frames which ultimately fails.
 734          */
 735         if (ctx->total < get_block_size(ctx))
 736                 return omap_sham_update_dma_slow(dd);
 737
 738         dev_dbg(dd->dev, "fast: digcnt: %d, bufcnt: %u, total: %u\n",
 739                         ctx->digcnt, ctx->bufcnt, ctx->total);
 740
 741         sg = ctx->sg;
 742         bs = get_block_size(ctx);
 743
 744         if (!SG_AA(sg))
 745                 return omap_sham_update_dma_slow(dd);
 746
 747         if (!sg_is_last(sg) && !SG_SA(sg, bs))
 748                 /* size is not BLOCK_SIZE aligned */
 749                 return omap_sham_update_dma_slow(dd);
 750
 751         length = min(ctx->total, sg->length);
 752
 753         if (sg_is_last(sg)) {
 754                 if (!(ctx->flags & BIT(FLAGS_FINUP))) {
 755                         /* not last sg must be BLOCK_SIZE aligned */
 756                         tail = length & (bs - 1);
 757                         /* without finup() we need one block to close hash */
 758                         if (!tail)
 759                                 tail = bs;
 760                         length -= tail;
 761                 }
 762         }
 763
 764         if (!dma_map_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE)) {
 765                 dev_err(dd->dev, "dma_map_sg  error\n");
 766                 return -EINVAL;
 767         }
 768
 769         ctx->flags |= BIT(FLAGS_SG);
 770
 771         ctx->total -= length;
 772         ctx->offset = length; /* offset where to start slow */
 773
 774         final = (ctx->flags & BIT(FLAGS_FINUP)) && !ctx->total;
 775
 776         ret = omap_sham_xmit_dma(dd, sg_dma_address(ctx->sg), length, final, 1);
 777         if (ret != -EINPROGRESS)
 778                 dma_unmap_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE);
 779
 780         return ret;
 781 }
 782
 783 static int omap_sham_update_cpu(struct omap_sham_dev *dd)
 784 {
 785         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 786         int bufcnt, final;
 787
 788         if (!ctx->total)
 789                 return 0;
 790
 791         omap_sham_append_sg(ctx);
 792
 793         final = (ctx->flags & BIT(FLAGS_FINUP)) && !ctx->total;
 794
 795         dev_dbg(dd->dev, "cpu: bufcnt: %u, digcnt: %d, final: %d\n",
 796                 ctx->bufcnt, ctx->digcnt, final);
 797
 798         if (final || (ctx->bufcnt == ctx->buflen && ctx->total)) {
 799                 bufcnt = ctx->bufcnt;
 800                 ctx->bufcnt = 0;
 801                 return omap_sham_xmit_cpu(dd, ctx->buffer, bufcnt, final);
 802         }
 803
 804         return 0;
 805 }
 806
 807 static int omap_sham_update_dma_stop(struct omap_sham_dev *dd)
 808 {
 809         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
 810
 811         dmaengine_terminate_all(dd->dma_lch);
 812
 813         if (ctx->flags & BIT(FLAGS_SG)) {
 814                 dma_unmap_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE);
 815                 if (ctx->sg->length == ctx->offset) {
 816                         ctx->sg = sg_next(ctx->sg);
 817                         if (ctx->sg)
 818                                 ctx->offset = 0;
 819                 }
 820         } else {
 821                 dma_unmap_single(dd->dev, ctx->dma_addr, ctx->buflen,
 822                                  DMA_TO_DEVICE);
 823         }
 824
 825         return 0;
 826 }
 827
 828 static int omap_sham_init(struct ahash_request *req)
 829 {
 830         struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
 831         struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
 832         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 833         struct omap_sham_dev *dd = NULL, *tmp;
 834         int bs = 0;
 835
 836         spin_lock_bh(&sham.lock);
 837         if (!tctx->dd) {
 838                 list_for_each_entry(tmp, &sham.dev_list, list) {
 839                         dd = tmp;
 840                         break;
 841                 }
 842                 tctx->dd = dd;
 843         } else {
 844                 dd = tctx->dd;
 845         }
 846         spin_unlock_bh(&sham.lock);
 847
 848         ctx->dd = dd;
 849
 850         ctx->flags = 0;
 851
 852         dev_dbg(dd->dev, "init: digest size: %d\n",
 853                 crypto_ahash_digestsize(tfm));
 854
 855         switch (crypto_ahash_digestsize(tfm)) {
 856         case MD5_DIGEST_SIZE:
 857                 ctx->flags |= FLAGS_MODE_MD5;
 858                 bs = SHA1_BLOCK_SIZE;
 859                 break;
 860         case SHA1_DIGEST_SIZE:
 861                 ctx->flags |= FLAGS_MODE_SHA1;
 862                 bs = SHA1_BLOCK_SIZE;
 863                 break;
 864         case SHA224_DIGEST_SIZE:
 865                 ctx->flags |= FLAGS_MODE_SHA224;
 866                 bs = SHA224_BLOCK_SIZE;
 867                 break;
 868         case SHA256_DIGEST_SIZE:
 869                 ctx->flags |= FLAGS_MODE_SHA256;
 870                 bs = SHA256_BLOCK_SIZE;
 871                 break;
 872         case SHA384_DIGEST_SIZE:
 873                 ctx->flags |= FLAGS_MODE_SHA384;
 874                 bs = SHA384_BLOCK_SIZE;
 875                 break;
 876         case SHA512_DIGEST_SIZE:
 877                 ctx->flags |= FLAGS_MODE_SHA512;
 878                 bs = SHA512_BLOCK_SIZE;
 879                 break;
 880         }
 881
 882         ctx->bufcnt = 0;
 883         ctx->digcnt = 0;
 884         ctx->buflen = BUFLEN;
 885
 886         if (tctx->flags & BIT(FLAGS_HMAC)) {
 887                 if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) {
 888                         struct omap_sham_hmac_ctx *bctx = tctx->base;
 889
 890                         memcpy(ctx->buffer, bctx->ipad, bs);
 891                         ctx->bufcnt = bs;
 892                 }
 893
 894                 ctx->flags |= BIT(FLAGS_HMAC);
 895         }
 896
 897         return 0;
 898
 899 }
 900
 901 static int omap_sham_update_req(struct omap_sham_dev *dd)
 902 {
 903         struct ahash_request *req = dd->req;
 904         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 905         int err;
 906
 907         dev_dbg(dd->dev, "update_req: total: %u, digcnt: %d, finup: %d\n",
 908                  ctx->total, ctx->digcnt, (ctx->flags & BIT(FLAGS_FINUP)) != 0);
 909
 910         if (ctx->flags & BIT(FLAGS_CPU))
 911                 err = omap_sham_update_cpu(dd);
 912         else
 913                 err = omap_sham_update_dma_start(dd);
 914
 915         /* wait for dma completion before can take more data */
 916         dev_dbg(dd->dev, "update: err: %d, digcnt: %d\n", err, ctx->digcnt);
 917
 918         return err;
 919 }
 920
 921 static int omap_sham_final_req(struct omap_sham_dev *dd)
 922 {
 923         struct ahash_request *req = dd->req;
 924         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 925         int err = 0, use_dma = 1;
 926
 927         if ((ctx->bufcnt <= get_block_size(ctx)) || dd->polling_mode)
 928                 /*
 929                  * faster to handle last block with cpu or
 930                  * use cpu when dma is not present.
 931                  */
 932                 use_dma = 0;
 933
 934         if (use_dma)
 935                 err = omap_sham_xmit_dma_map(dd, ctx, ctx->bufcnt, 1);
 936         else
 937                 err = omap_sham_xmit_cpu(dd, ctx->buffer, ctx->bufcnt, 1);
 938
 939         ctx->bufcnt = 0;
 940
 941         dev_dbg(dd->dev, "final_req: err: %d\n", err);
 942
 943         return err;
 944 }
 945
 946 static int omap_sham_finish_hmac(struct ahash_request *req)
 947 {
 948         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
 949         struct omap_sham_hmac_ctx *bctx = tctx->base;
 950         int bs = crypto_shash_blocksize(bctx->shash);
 951         int ds = crypto_shash_digestsize(bctx->shash);
 952         SHASH_DESC_ON_STACK(shash, bctx->shash);
 953
 954         shash->tfm = bctx->shash;
 955         shash->flags = 0; /* not CRYPTO_TFM_REQ_MAY_SLEEP */
 956
 957         return crypto_shash_init(shash) ?:
 958                crypto_shash_update(shash, bctx->opad, bs) ?:
 959                crypto_shash_finup(shash, req->result, ds, req->result);
 960 }
 961
 962 static int omap_sham_finish(struct ahash_request *req)
 963 {
 964         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 965         struct omap_sham_dev *dd = ctx->dd;
 966         int err = 0;
 967
 968         if (ctx->digcnt) {
 969                 omap_sham_copy_ready_hash(req);
 970                 if ((ctx->flags & BIT(FLAGS_HMAC)) &&
 971                                 !test_bit(FLAGS_AUTO_XOR, &dd->flags))
 972                         err = omap_sham_finish_hmac(req);
 973         }
 974
 975         dev_dbg(dd->dev, "digcnt: %d, bufcnt: %d\n", ctx->digcnt, ctx->bufcnt);
 976
 977         return err;
 978 }
 979
 980 static void omap_sham_finish_req(struct ahash_request *req, int err)
 981 {
 982         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
 983         struct omap_sham_dev *dd = ctx->dd;
 984
 985         if (!err) {
 986                 dd->pdata->copy_hash(req, 1);
 987                 if (test_bit(FLAGS_FINAL, &dd->flags))
 988                         err = omap_sham_finish(req);
 989         } else {
 990                 ctx->flags |= BIT(FLAGS_ERROR);
 991         }
 992
 993         /* atomic operation is not needed here */
 994         dd->flags &= ~(BIT(FLAGS_BUSY) | BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) |
 995                         BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY));
 996
 997         pm_runtime_put(dd->dev);
 998
 999         if (req->base.complete)
1000                 req->base.complete(&req->base, err);
1001
1002         /* handle new request */
1003         tasklet_schedule(&dd->done_task);
1004 }
1005
1006 static int omap_sham_handle_queue(struct omap_sham_dev *dd,
1007                                   struct ahash_request *req)
1008 {
1009         struct crypto_async_request *async_req, *backlog;
1010         struct omap_sham_reqctx *ctx;
1011         unsigned long flags;
1012         int err = 0, ret = 0;
1013
1014         spin_lock_irqsave(&dd->lock, flags);
1015         if (req)
1016                 ret = ahash_enqueue_request(&dd->queue, req);
1017         if (test_bit(FLAGS_BUSY, &dd->flags)) {
1018                 spin_unlock_irqrestore(&dd->lock, flags);
1019                 return ret;
1020         }
1021         backlog = crypto_get_backlog(&dd->queue);
1022         async_req = crypto_dequeue_request(&dd->queue);
1023         if (async_req)
1024                 set_bit(FLAGS_BUSY, &dd->flags);
1025         spin_unlock_irqrestore(&dd->lock, flags);
1026
1027         if (!async_req)
1028                 return ret;
1029
1030         if (backlog)
1031                 backlog->complete(backlog, -EINPROGRESS);
1032
1033         req = ahash_request_cast(async_req);
1034         dd->req = req;
1035         ctx = ahash_request_ctx(req);
1036
1037         dev_dbg(dd->dev, "handling new req, op: %lu, nbytes: %d\n",
1038                                                 ctx->op, req->nbytes);
1039
1040         err = omap_sham_hw_init(dd);
1041         if (err)
1042                 goto err1;
1043
1044         if (ctx->digcnt)
1045                 /* request has changed - restore hash */
1046                 dd->pdata->copy_hash(req, 0);
1047
1048         if (ctx->op == OP_UPDATE) {
1049                 err = omap_sham_update_req(dd);
1050                 if (err != -EINPROGRESS && (ctx->flags & BIT(FLAGS_FINUP)))
1051                         /* no final() after finup() */
1052                         err = omap_sham_final_req(dd);
1053         } else if (ctx->op == OP_FINAL) {
1054                 err = omap_sham_final_req(dd);
1055         }
1056 err1:
1057         if (err != -EINPROGRESS)
1058                 /* done_task will not finish it, so do it here */
1059                 omap_sham_finish_req(req, err);
1060
1061         dev_dbg(dd->dev, "exit, err: %d\n", err);
1062
1063         return ret;
1064 }
1065
1066 static int omap_sham_enqueue(struct ahash_request *req, unsigned int op)
1067 {
1068         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1069         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1070         struct omap_sham_dev *dd = tctx->dd;
1071
1072         ctx->op = op;
1073
1074         return omap_sham_handle_queue(dd, req);
1075 }
1076
1077 static int omap_sham_update(struct ahash_request *req)
1078 {
1079         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1080         struct omap_sham_dev *dd = ctx->dd;
1081         int bs = get_block_size(ctx);
1082
1083         if (!req->nbytes)
1084                 return 0;
1085
1086         ctx->total = req->nbytes;
1087         ctx->sg = req->src;
1088         ctx->offset = 0;
1089
1090         if (ctx->flags & BIT(FLAGS_FINUP)) {
1091                 if ((ctx->digcnt + ctx->bufcnt + ctx->total) < 9) {
1092                         /*
1093                         * OMAP HW accel works only with buffers >= 9
1094                         * will switch to bypass in final()
1095                         * final has the same request and data
1096                         */
1097                         omap_sham_append_sg(ctx);
1098                         return 0;
1099                 } else if ((ctx->bufcnt + ctx->total <= bs) ||
1100                            dd->polling_mode) {
1101                         /*
1102                          * faster to use CPU for short transfers or
1103                          * use cpu when dma is not present.
1104                          */
1105                         ctx->flags |= BIT(FLAGS_CPU);
1106                 }
1107         } else if (ctx->bufcnt + ctx->total < ctx->buflen) {
1108                 omap_sham_append_sg(ctx);
1109                 return 0;
1110         }
1111
1112         if (dd->polling_mode)
1113                 ctx->flags |= BIT(FLAGS_CPU);
1114
1115         return omap_sham_enqueue(req, OP_UPDATE);
1116 }
1117
1118 static int omap_sham_shash_digest(struct crypto_shash *tfm, u32 flags,
1119                                   const u8 *data, unsigned int len, u8 *out)
1120 {
1121         SHASH_DESC_ON_STACK(shash, tfm);
1122
1123         shash->tfm = tfm;
1124         shash->flags = flags & CRYPTO_TFM_REQ_MAY_SLEEP;
1125
1126         return crypto_shash_digest(shash, data, len, out);
1127 }
1128
1129 static int omap_sham_final_shash(struct ahash_request *req)
1130 {
1131         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1132         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1133
1134         return omap_sham_shash_digest(tctx->fallback, req->base.flags,
1135                                       ctx->buffer, ctx->bufcnt, req->result);
1136 }
1137
1138 static int omap_sham_final(struct ahash_request *req)
1139 {
1140         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1141
1142         ctx->flags |= BIT(FLAGS_FINUP);
1143
1144         if (ctx->flags & BIT(FLAGS_ERROR))
1145                 return 0; /* uncompleted hash is not needed */
1146
1147         /* OMAP HW accel works only with buffers >= 9 */
1148         /* HMAC is always >= 9 because ipad == block size */
1149         if ((ctx->digcnt + ctx->bufcnt) < 9)
1150                 return omap_sham_final_shash(req);
1151         else if (ctx->bufcnt)
1152                 return omap_sham_enqueue(req, OP_FINAL);
1153
1154         /* copy ready hash (+ finalize hmac) */
1155         return omap_sham_finish(req);
1156 }
1157
1158 static int omap_sham_finup(struct ahash_request *req)
1159 {
1160         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1161         int err1, err2;
1162
1163         ctx->flags |= BIT(FLAGS_FINUP);
1164
1165         err1 = omap_sham_update(req);
1166         if (err1 == -EINPROGRESS || err1 == -EBUSY)
1167                 return err1;
1168         /*
1169          * final() has to be always called to cleanup resources
1170          * even if udpate() failed, except EINPROGRESS
1171          */
1172         err2 = omap_sham_final(req);
1173
1174         return err1 ?: err2;
1175 }
1176
1177 static int omap_sham_digest(struct ahash_request *req)
1178 {
1179         return omap_sham_init(req) ?: omap_sham_finup(req);
1180 }
1181
1182 static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key,
1183                       unsigned int keylen)
1184 {
1185         struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
1186         struct omap_sham_hmac_ctx *bctx = tctx->base;
1187         int bs = crypto_shash_blocksize(bctx->shash);
1188         int ds = crypto_shash_digestsize(bctx->shash);
1189         struct omap_sham_dev *dd = NULL, *tmp;
1190         int err, i;
1191
1192         spin_lock_bh(&sham.lock);
1193         if (!tctx->dd) {
1194                 list_for_each_entry(tmp, &sham.dev_list, list) {
1195                         dd = tmp;
1196                         break;
1197                 }
1198                 tctx->dd = dd;
1199         } else {
1200                 dd = tctx->dd;
1201         }
1202         spin_unlock_bh(&sham.lock);
1203
1204         err = crypto_shash_setkey(tctx->fallback, key, keylen);
1205         if (err)
1206                 return err;
1207
1208         if (keylen > bs) {
1209                 err = omap_sham_shash_digest(bctx->shash,
1210                                 crypto_shash_get_flags(bctx->shash),
1211                                 key, keylen, bctx->ipad);
1212                 if (err)
1213                         return err;
1214                 keylen = ds;
1215         } else {
1216                 memcpy(bctx->ipad, key, keylen);
1217         }
1218
1219         memset(bctx->ipad + keylen, 0, bs - keylen);
1220
1221         if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) {
1222                 memcpy(bctx->opad, bctx->ipad, bs);
1223
1224                 for (i = 0; i < bs; i++) {
1225                         bctx->ipad[i] ^= 0x36;
1226                         bctx->opad[i] ^= 0x5c;
1227                 }
1228         }
1229
1230         return err;
1231 }
1232
1233 static int omap_sham_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base)
1234 {
1235         struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
1236         const char *alg_name = crypto_tfm_alg_name(tfm);
1237
1238         /* Allocate a fallback and abort if it failed. */
1239         tctx->fallback = crypto_alloc_shash(alg_name, 0,
1240                                             CRYPTO_ALG_NEED_FALLBACK);
1241         if (IS_ERR(tctx->fallback)) {
1242                 pr_err("omap-sham: fallback driver '%s' "
1243                                 "could not be loaded.\n", alg_name);
1244                 return PTR_ERR(tctx->fallback);
1245         }
1246
1247         crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
1248                                  sizeof(struct omap_sham_reqctx) + BUFLEN);
1249
1250         if (alg_base) {
1251                 struct omap_sham_hmac_ctx *bctx = tctx->base;
1252                 tctx->flags |= BIT(FLAGS_HMAC);
1253                 bctx->shash = crypto_alloc_shash(alg_base, 0,
1254                                                 CRYPTO_ALG_NEED_FALLBACK);
1255                 if (IS_ERR(bctx->shash)) {
1256                         pr_err("omap-sham: base driver '%s' "
1257                                         "could not be loaded.\n", alg_base);
1258                         crypto_free_shash(tctx->fallback);
1259                         return PTR_ERR(bctx->shash);
1260                 }
1261
1262         }
1263
1264         return 0;
1265 }
1266
1267 static int omap_sham_cra_init(struct crypto_tfm *tfm)
1268 {
1269         return omap_sham_cra_init_alg(tfm, NULL);
1270 }
1271
1272 static int omap_sham_cra_sha1_init(struct crypto_tfm *tfm)
1273 {
1274         return omap_sham_cra_init_alg(tfm, "sha1");
1275 }
1276
1277 static int omap_sham_cra_sha224_init(struct crypto_tfm *tfm)
1278 {
1279         return omap_sham_cra_init_alg(tfm, "sha224");
1280 }
1281
1282 static int omap_sham_cra_sha256_init(struct crypto_tfm *tfm)
1283 {
1284         return omap_sham_cra_init_alg(tfm, "sha256");
1285 }
1286
1287 static int omap_sham_cra_md5_init(struct crypto_tfm *tfm)
1288 {
1289         return omap_sham_cra_init_alg(tfm, "md5");
1290 }
1291
1292 static int omap_sham_cra_sha384_init(struct crypto_tfm *tfm)
1293 {
1294         return omap_sham_cra_init_alg(tfm, "sha384");
1295 }
1296
1297 static int omap_sham_cra_sha512_init(struct crypto_tfm *tfm)
1298 {
1299         return omap_sham_cra_init_alg(tfm, "sha512");
1300 }
1301
1302 static void omap_sham_cra_exit(struct crypto_tfm *tfm)
1303 {
1304         struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
1305
1306         crypto_free_shash(tctx->fallback);
1307         tctx->fallback = NULL;
1308
1309         if (tctx->flags & BIT(FLAGS_HMAC)) {
1310                 struct omap_sham_hmac_ctx *bctx = tctx->base;
1311                 crypto_free_shash(bctx->shash);
1312         }
1313 }
1314
1315 static struct ahash_alg algs_sha1_md5[] = {
1316 {
1317         .init           = omap_sham_init,
1318         .update         = omap_sham_update,
1319         .final          = omap_sham_final,
1320         .finup          = omap_sham_finup,
1321         .digest         = omap_sham_digest,
1322         .halg.digestsize        = SHA1_DIGEST_SIZE,
1323         .halg.base      = {
1324                 .cra_name               = "sha1",
1325                 .cra_driver_name        = "omap-sha1",
1326                 .cra_priority           = 100,
1327                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1328                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1329                                                 CRYPTO_ALG_ASYNC |
1330                                                 CRYPTO_ALG_NEED_FALLBACK,
1331                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1332                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1333                 .cra_alignmask          = 0,
1334                 .cra_module             = THIS_MODULE,
1335                 .cra_init               = omap_sham_cra_init,
1336                 .cra_exit               = omap_sham_cra_exit,
1337         }
1338 },
1339 {
1340         .init           = omap_sham_init,
1341         .update         = omap_sham_update,
1342         .final          = omap_sham_final,
1343         .finup          = omap_sham_finup,
1344         .digest         = omap_sham_digest,
1345         .halg.digestsize        = MD5_DIGEST_SIZE,
1346         .halg.base      = {
1347                 .cra_name               = "md5",
1348                 .cra_driver_name        = "omap-md5",
1349                 .cra_priority           = 100,
1350                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1351                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1352                                                 CRYPTO_ALG_ASYNC |
1353                                                 CRYPTO_ALG_NEED_FALLBACK,
1354                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1355                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1356                 .cra_alignmask          = OMAP_ALIGN_MASK,
1357                 .cra_module             = THIS_MODULE,
1358                 .cra_init               = omap_sham_cra_init,
1359                 .cra_exit               = omap_sham_cra_exit,
1360         }
1361 },
1362 {
1363         .init           = omap_sham_init,
1364         .update         = omap_sham_update,
1365         .final          = omap_sham_final,
1366         .finup          = omap_sham_finup,
1367         .digest         = omap_sham_digest,
1368         .setkey         = omap_sham_setkey,
1369         .halg.digestsize        = SHA1_DIGEST_SIZE,
1370         .halg.base      = {
1371                 .cra_name               = "hmac(sha1)",
1372                 .cra_driver_name        = "omap-hmac-sha1",
1373                 .cra_priority           = 100,
1374                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1375                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1376                                                 CRYPTO_ALG_ASYNC |
1377                                                 CRYPTO_ALG_NEED_FALLBACK,
1378                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1379                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1380                                         sizeof(struct omap_sham_hmac_ctx),
1381                 .cra_alignmask          = OMAP_ALIGN_MASK,
1382                 .cra_module             = THIS_MODULE,
1383                 .cra_init               = omap_sham_cra_sha1_init,
1384                 .cra_exit               = omap_sham_cra_exit,
1385         }
1386 },
1387 {
1388         .init           = omap_sham_init,
1389         .update         = omap_sham_update,
1390         .final          = omap_sham_final,
1391         .finup          = omap_sham_finup,
1392         .digest         = omap_sham_digest,
1393         .setkey         = omap_sham_setkey,
1394         .halg.digestsize        = MD5_DIGEST_SIZE,
1395         .halg.base      = {
1396                 .cra_name               = "hmac(md5)",
1397                 .cra_driver_name        = "omap-hmac-md5",
1398                 .cra_priority           = 100,
1399                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1400                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1401                                                 CRYPTO_ALG_ASYNC |
1402                                                 CRYPTO_ALG_NEED_FALLBACK,
1403                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1404                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1405                                         sizeof(struct omap_sham_hmac_ctx),
1406                 .cra_alignmask          = OMAP_ALIGN_MASK,
1407                 .cra_module             = THIS_MODULE,
1408                 .cra_init               = omap_sham_cra_md5_init,
1409                 .cra_exit               = omap_sham_cra_exit,
1410         }
1411 }
1412 };
1413
1414 /* OMAP4 has some algs in addition to what OMAP2 has */
1415 static struct ahash_alg algs_sha224_sha256[] = {
1416 {
1417         .init           = omap_sham_init,
1418         .update         = omap_sham_update,
1419         .final          = omap_sham_final,
1420         .finup          = omap_sham_finup,
1421         .digest         = omap_sham_digest,
1422         .halg.digestsize        = SHA224_DIGEST_SIZE,
1423         .halg.base      = {
1424                 .cra_name               = "sha224",
1425                 .cra_driver_name        = "omap-sha224",
1426                 .cra_priority           = 100,
1427                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1428                                                 CRYPTO_ALG_ASYNC |
1429                                                 CRYPTO_ALG_NEED_FALLBACK,
1430                 .cra_blocksize          = SHA224_BLOCK_SIZE,
1431                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1432                 .cra_alignmask          = 0,
1433                 .cra_module             = THIS_MODULE,
1434                 .cra_init               = omap_sham_cra_init,
1435                 .cra_exit               = omap_sham_cra_exit,
1436         }
1437 },
1438 {
1439         .init           = omap_sham_init,
1440         .update         = omap_sham_update,
1441         .final          = omap_sham_final,
1442         .finup          = omap_sham_finup,
1443         .digest         = omap_sham_digest,
1444         .halg.digestsize        = SHA256_DIGEST_SIZE,
1445         .halg.base      = {
1446                 .cra_name               = "sha256",
1447                 .cra_driver_name        = "omap-sha256",
1448                 .cra_priority           = 100,
1449                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1450                                                 CRYPTO_ALG_ASYNC |
1451                                                 CRYPTO_ALG_NEED_FALLBACK,
1452                 .cra_blocksize          = SHA256_BLOCK_SIZE,
1453                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1454                 .cra_alignmask          = 0,
1455                 .cra_module             = THIS_MODULE,
1456                 .cra_init               = omap_sham_cra_init,
1457                 .cra_exit               = omap_sham_cra_exit,
1458         }
1459 },
1460 {
1461         .init           = omap_sham_init,
1462         .update         = omap_sham_update,
1463         .final          = omap_sham_final,
1464         .finup          = omap_sham_finup,
1465         .digest         = omap_sham_digest,
1466         .setkey         = omap_sham_setkey,
1467         .halg.digestsize        = SHA224_DIGEST_SIZE,
1468         .halg.base      = {
1469                 .cra_name               = "hmac(sha224)",
1470                 .cra_driver_name        = "omap-hmac-sha224",
1471                 .cra_priority           = 100,
1472                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1473                                                 CRYPTO_ALG_ASYNC |
1474                                                 CRYPTO_ALG_NEED_FALLBACK,
1475                 .cra_blocksize          = SHA224_BLOCK_SIZE,
1476                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1477                                         sizeof(struct omap_sham_hmac_ctx),
1478                 .cra_alignmask          = OMAP_ALIGN_MASK,
1479                 .cra_module             = THIS_MODULE,
1480                 .cra_init               = omap_sham_cra_sha224_init,
1481                 .cra_exit               = omap_sham_cra_exit,
1482         }
1483 },
1484 {
1485         .init           = omap_sham_init,
1486         .update         = omap_sham_update,
1487         .final          = omap_sham_final,
1488         .finup          = omap_sham_finup,
1489         .digest         = omap_sham_digest,
1490         .setkey         = omap_sham_setkey,
1491         .halg.digestsize        = SHA256_DIGEST_SIZE,
1492         .halg.base      = {
1493                 .cra_name               = "hmac(sha256)",
1494                 .cra_driver_name        = "omap-hmac-sha256",
1495                 .cra_priority           = 100,
1496                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1497                                                 CRYPTO_ALG_ASYNC |
1498                                                 CRYPTO_ALG_NEED_FALLBACK,
1499                 .cra_blocksize          = SHA256_BLOCK_SIZE,
1500                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1501                                         sizeof(struct omap_sham_hmac_ctx),
1502                 .cra_alignmask          = OMAP_ALIGN_MASK,
1503                 .cra_module             = THIS_MODULE,
1504                 .cra_init               = omap_sham_cra_sha256_init,
1505                 .cra_exit               = omap_sham_cra_exit,
1506         }
1507 },
1508 };
1509
1510 static struct ahash_alg algs_sha384_sha512[] = {
1511 {
1512         .init           = omap_sham_init,
1513         .update         = omap_sham_update,
1514         .final          = omap_sham_final,
1515         .finup          = omap_sham_finup,
1516         .digest         = omap_sham_digest,
1517         .halg.digestsize        = SHA384_DIGEST_SIZE,
1518         .halg.base      = {
1519                 .cra_name               = "sha384",
1520                 .cra_driver_name        = "omap-sha384",
1521                 .cra_priority           = 100,
1522                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1523                                                 CRYPTO_ALG_ASYNC |
1524                                                 CRYPTO_ALG_NEED_FALLBACK,
1525                 .cra_blocksize          = SHA384_BLOCK_SIZE,
1526                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1527                 .cra_alignmask          = 0,
1528                 .cra_module             = THIS_MODULE,
1529                 .cra_init               = omap_sham_cra_init,
1530                 .cra_exit               = omap_sham_cra_exit,
1531         }
1532 },
1533 {
1534         .init           = omap_sham_init,
1535         .update         = omap_sham_update,
1536         .final          = omap_sham_final,
1537         .finup          = omap_sham_finup,
1538         .digest         = omap_sham_digest,
1539         .halg.digestsize        = SHA512_DIGEST_SIZE,
1540         .halg.base      = {
1541                 .cra_name               = "sha512",
1542                 .cra_driver_name        = "omap-sha512",
1543                 .cra_priority           = 100,
1544                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1545                                                 CRYPTO_ALG_ASYNC |
1546                                                 CRYPTO_ALG_NEED_FALLBACK,
1547                 .cra_blocksize          = SHA512_BLOCK_SIZE,
1548                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1549                 .cra_alignmask          = 0,
1550                 .cra_module             = THIS_MODULE,
1551                 .cra_init               = omap_sham_cra_init,
1552                 .cra_exit               = omap_sham_cra_exit,
1553         }
1554 },
1555 {
1556         .init           = omap_sham_init,
1557         .update         = omap_sham_update,
1558         .final          = omap_sham_final,
1559         .finup          = omap_sham_finup,
1560         .digest         = omap_sham_digest,
1561         .setkey         = omap_sham_setkey,
1562         .halg.digestsize        = SHA384_DIGEST_SIZE,
1563         .halg.base      = {
1564                 .cra_name               = "hmac(sha384)",
1565                 .cra_driver_name        = "omap-hmac-sha384",
1566                 .cra_priority           = 100,
1567                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1568                                                 CRYPTO_ALG_ASYNC |
1569                                                 CRYPTO_ALG_NEED_FALLBACK,
1570                 .cra_blocksize          = SHA384_BLOCK_SIZE,
1571                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1572                                         sizeof(struct omap_sham_hmac_ctx),
1573                 .cra_alignmask          = OMAP_ALIGN_MASK,
1574                 .cra_module             = THIS_MODULE,
1575                 .cra_init               = omap_sham_cra_sha384_init,
1576                 .cra_exit               = omap_sham_cra_exit,
1577         }
1578 },
1579 {
1580         .init           = omap_sham_init,
1581         .update         = omap_sham_update,
1582         .final          = omap_sham_final,
1583         .finup          = omap_sham_finup,
1584         .digest         = omap_sham_digest,
1585         .setkey         = omap_sham_setkey,
1586         .halg.digestsize        = SHA512_DIGEST_SIZE,
1587         .halg.base      = {
1588                 .cra_name               = "hmac(sha512)",
1589                 .cra_driver_name        = "omap-hmac-sha512",
1590                 .cra_priority           = 100,
1591                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1592                                                 CRYPTO_ALG_ASYNC |
1593                                                 CRYPTO_ALG_NEED_FALLBACK,
1594                 .cra_blocksize          = SHA512_BLOCK_SIZE,
1595                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1596                                         sizeof(struct omap_sham_hmac_ctx),
1597                 .cra_alignmask          = OMAP_ALIGN_MASK,
1598                 .cra_module             = THIS_MODULE,
1599                 .cra_init               = omap_sham_cra_sha512_init,
1600                 .cra_exit               = omap_sham_cra_exit,
1601         }
1602 },
1603 };
1604
1605 static void omap_sham_done_task(unsigned long data)
1606 {
1607         struct omap_sham_dev *dd = (struct omap_sham_dev *)data;
1608         int err = 0;
1609
1610         if (!test_bit(FLAGS_BUSY, &dd->flags)) {
1611                 omap_sham_handle_queue(dd, NULL);
1612                 return;
1613         }
1614
1615         if (test_bit(FLAGS_CPU, &dd->flags)) {
1616                 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) {
1617                         /* hash or semi-hash ready */
1618                         err = omap_sham_update_cpu(dd);
1619                         if (err != -EINPROGRESS)
1620                                 goto finish;
1621                 }
1622         } else if (test_bit(FLAGS_DMA_READY, &dd->flags)) {
1623                 if (test_and_clear_bit(FLAGS_DMA_ACTIVE, &dd->flags)) {
1624                         omap_sham_update_dma_stop(dd);
1625                         if (dd->err) {
1626                                 err = dd->err;
1627                                 goto finish;
1628                         }
1629                 }
1630                 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) {
1631                         /* hash or semi-hash ready */
1632                         clear_bit(FLAGS_DMA_READY, &dd->flags);
1633                         err = omap_sham_update_dma_start(dd);
1634                         if (err != -EINPROGRESS)
1635                                 goto finish;
1636                 }
1637         }
1638
1639         return;
1640
1641 finish:
1642         dev_dbg(dd->dev, "update done: err: %d\n", err);
1643         /* finish curent request */
1644         omap_sham_finish_req(dd->req, err);
1645 }
1646
1647 static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd)
1648 {
1649         if (!test_bit(FLAGS_BUSY, &dd->flags)) {
1650                 dev_warn(dd->dev, "Interrupt when no active requests.\n");
1651         } else {
1652                 set_bit(FLAGS_OUTPUT_READY, &dd->flags);
1653                 tasklet_schedule(&dd->done_task);
1654         }
1655
1656         return IRQ_HANDLED;
1657 }
1658
1659 static irqreturn_t omap_sham_irq_omap2(int irq, void *dev_id)
1660 {
1661         struct omap_sham_dev *dd = dev_id;
1662
1663         if (unlikely(test_bit(FLAGS_FINAL, &dd->flags)))
1664                 /* final -> allow device to go to power-saving mode */
1665                 omap_sham_write_mask(dd, SHA_REG_CTRL, 0, SHA_REG_CTRL_LENGTH);
1666
1667         omap_sham_write_mask(dd, SHA_REG_CTRL, SHA_REG_CTRL_OUTPUT_READY,
1668                                  SHA_REG_CTRL_OUTPUT_READY);
1669         omap_sham_read(dd, SHA_REG_CTRL);
1670
1671         return omap_sham_irq_common(dd);
1672 }
1673
1674 static irqreturn_t omap_sham_irq_omap4(int irq, void *dev_id)
1675 {
1676         struct omap_sham_dev *dd = dev_id;
1677
1678         omap_sham_write_mask(dd, SHA_REG_MASK(dd), 0, SHA_REG_MASK_IT_EN);
1679
1680         return omap_sham_irq_common(dd);
1681 }
1682
1683 static struct omap_sham_algs_info omap_sham_algs_info_omap2[] = {
1684         {
1685                 .algs_list      = algs_sha1_md5,
1686                 .size           = ARRAY_SIZE(algs_sha1_md5),
1687         },
1688 };
1689
1690 static const struct omap_sham_pdata omap_sham_pdata_omap2 = {
1691         .algs_info      = omap_sham_algs_info_omap2,
1692         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap2),
1693         .flags          = BIT(FLAGS_BE32_SHA1),
1694         .digest_size    = SHA1_DIGEST_SIZE,
1695         .copy_hash      = omap_sham_copy_hash_omap2,
1696         .write_ctrl     = omap_sham_write_ctrl_omap2,
1697         .trigger        = omap_sham_trigger_omap2,
1698         .poll_irq       = omap_sham_poll_irq_omap2,
1699         .intr_hdlr      = omap_sham_irq_omap2,
1700         .idigest_ofs    = 0x00,
1701         .din_ofs        = 0x1c,
1702         .digcnt_ofs     = 0x14,
1703         .rev_ofs        = 0x5c,
1704         .mask_ofs       = 0x60,
1705         .sysstatus_ofs  = 0x64,
1706         .major_mask     = 0xf0,
1707         .major_shift    = 4,
1708         .minor_mask     = 0x0f,
1709         .minor_shift    = 0,
1710 };
1711
1712 #ifdef CONFIG_OF
1713 static struct omap_sham_algs_info omap_sham_algs_info_omap4[] = {
1714         {
1715                 .algs_list      = algs_sha1_md5,
1716                 .size           = ARRAY_SIZE(algs_sha1_md5),
1717         },
1718         {
1719                 .algs_list      = algs_sha224_sha256,
1720                 .size           = ARRAY_SIZE(algs_sha224_sha256),
1721         },
1722 };
1723
1724 static const struct omap_sham_pdata omap_sham_pdata_omap4 = {
1725         .algs_info      = omap_sham_algs_info_omap4,
1726         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap4),
1727         .flags          = BIT(FLAGS_AUTO_XOR),
1728         .digest_size    = SHA256_DIGEST_SIZE,
1729         .copy_hash      = omap_sham_copy_hash_omap4,
1730         .write_ctrl     = omap_sham_write_ctrl_omap4,
1731         .trigger        = omap_sham_trigger_omap4,
1732         .poll_irq       = omap_sham_poll_irq_omap4,
1733         .intr_hdlr      = omap_sham_irq_omap4,
1734         .idigest_ofs    = 0x020,
1735         .odigest_ofs    = 0x0,
1736         .din_ofs        = 0x080,
1737         .digcnt_ofs     = 0x040,
1738         .rev_ofs        = 0x100,
1739         .mask_ofs       = 0x110,
1740         .sysstatus_ofs  = 0x114,
1741         .mode_ofs       = 0x44,
1742         .length_ofs     = 0x48,
1743         .major_mask     = 0x0700,
1744         .major_shift    = 8,
1745         .minor_mask     = 0x003f,
1746         .minor_shift    = 0,
1747 };
1748
1749 static struct omap_sham_algs_info omap_sham_algs_info_omap5[] = {
1750         {
1751                 .algs_list      = algs_sha1_md5,
1752                 .size           = ARRAY_SIZE(algs_sha1_md5),
1753         },
1754         {
1755                 .algs_list      = algs_sha224_sha256,
1756                 .size           = ARRAY_SIZE(algs_sha224_sha256),
1757         },
1758         {
1759                 .algs_list      = algs_sha384_sha512,
1760                 .size           = ARRAY_SIZE(algs_sha384_sha512),
1761         },
1762 };
1763
1764 static const struct omap_sham_pdata omap_sham_pdata_omap5 = {
1765         .algs_info      = omap_sham_algs_info_omap5,
1766         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap5),
1767         .flags          = BIT(FLAGS_AUTO_XOR),
1768         .digest_size    = SHA512_DIGEST_SIZE,
1769         .copy_hash      = omap_sham_copy_hash_omap4,
1770         .write_ctrl     = omap_sham_write_ctrl_omap4,
1771         .trigger        = omap_sham_trigger_omap4,
1772         .poll_irq       = omap_sham_poll_irq_omap4,
1773         .intr_hdlr      = omap_sham_irq_omap4,
1774         .idigest_ofs    = 0x240,
1775         .odigest_ofs    = 0x200,
1776         .din_ofs        = 0x080,
1777         .digcnt_ofs     = 0x280,
1778         .rev_ofs        = 0x100,
1779         .mask_ofs       = 0x110,
1780         .sysstatus_ofs  = 0x114,
1781         .mode_ofs       = 0x284,
1782         .length_ofs     = 0x288,
1783         .major_mask     = 0x0700,
1784         .major_shift    = 8,
1785         .minor_mask     = 0x003f,
1786         .minor_shift    = 0,
1787 };
1788
1789 static const struct of_device_id omap_sham_of_match[] = {
1790         {
1791                 .compatible     = "ti,omap2-sham",
1792                 .data           = &omap_sham_pdata_omap2,
1793         },
1794         {
1795                 .compatible     = "ti,omap4-sham",
1796                 .data           = &omap_sham_pdata_omap4,
1797         },
1798         {
1799                 .compatible     = "ti,omap5-sham",
1800                 .data           = &omap_sham_pdata_omap5,
1801         },
1802         {},
1803 };
1804 MODULE_DEVICE_TABLE(of, omap_sham_of_match);
1805
1806 static int omap_sham_get_res_of(struct omap_sham_dev *dd,
1807                 struct device *dev, struct resource *res)
1808 {
1809         struct device_node *node = dev->of_node;
1810         const struct of_device_id *match;
1811         int err = 0;
1812
1813         match = of_match_device(of_match_ptr(omap_sham_of_match), dev);
1814         if (!match) {
1815                 dev_err(dev, "no compatible OF match\n");
1816                 err = -EINVAL;
1817                 goto err;
1818         }
1819
1820         err = of_address_to_resource(node, 0, res);
1821         if (err < 0) {
1822                 dev_err(dev, "can't translate OF node address\n");
1823                 err = -EINVAL;
1824                 goto err;
1825         }
1826
1827         dd->irq = irq_of_parse_and_map(node, 0);
1828         if (!dd->irq) {
1829                 dev_err(dev, "can't translate OF irq value\n");
1830                 err = -EINVAL;
1831                 goto err;
1832         }
1833
1834         dd->dma = -1; /* Dummy value that's unused */
1835         dd->pdata = match->data;
1836
1837 err:
1838         return err;
1839 }
1840 #else
1841 static const struct of_device_id omap_sham_of_match[] = {
1842         {},
1843 };
1844
1845 static int omap_sham_get_res_of(struct omap_sham_dev *dd,
1846                 struct device *dev, struct resource *res)
1847 {
1848         return -EINVAL;
1849 }
1850 #endif
1851
1852 static int omap_sham_get_res_pdev(struct omap_sham_dev *dd,
1853                 struct platform_device *pdev, struct resource *res)
1854 {
1855         struct device *dev = &pdev->dev;
1856         struct resource *r;
1857         int err = 0;
1858
1859         /* Get the base address */
1860         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1861         if (!r) {
1862                 dev_err(dev, "no MEM resource info\n");
1863                 err = -ENODEV;
1864                 goto err;
1865         }
1866         memcpy(res, r, sizeof(*res));
1867
1868         /* Get the IRQ */
1869         dd->irq = platform_get_irq(pdev, 0);
1870         if (dd->irq < 0) {
1871                 dev_err(dev, "no IRQ resource info\n");
1872                 err = dd->irq;
1873                 goto err;
1874         }
1875
1876         /* Get the DMA */
1877         r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1878         if (!r) {
1879                 dev_err(dev, "no DMA resource info\n");
1880                 err = -ENODEV;
1881                 goto err;
1882         }
1883         dd->dma = r->start;
1884
1885         /* Only OMAP2/3 can be non-DT */
1886         dd->pdata = &omap_sham_pdata_omap2;
1887
1888 err:
1889         return err;
1890 }
1891
1892 static int omap_sham_probe(struct platform_device *pdev)
1893 {
1894         struct omap_sham_dev *dd;
1895         struct device *dev = &pdev->dev;
1896         struct resource res;
1897         dma_cap_mask_t mask;
1898         int err, i, j;
1899         u32 rev;
1900
1901         dd = devm_kzalloc(dev, sizeof(struct omap_sham_dev), GFP_KERNEL);
1902         if (dd == NULL) {
1903                 dev_err(dev, "unable to alloc data struct.\n");
1904                 err = -ENOMEM;
1905                 goto data_err;
1906         }
1907         dd->dev = dev;
1908         platform_set_drvdata(pdev, dd);
1909
1910         INIT_LIST_HEAD(&dd->list);
1911         spin_lock_init(&dd->lock);
1912         tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd);
1913         crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH);
1914
1915         err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) :
1916                                omap_sham_get_res_pdev(dd, pdev, &res);
1917         if (err)
1918                 goto data_err;
1919
1920         dd->io_base = devm_ioremap_resource(dev, &res);
1921         if (IS_ERR(dd->io_base)) {
1922                 err = PTR_ERR(dd->io_base);
1923                 goto data_err;
1924         }
1925         dd->phys_base = res.start;
1926
1927         err = devm_request_irq(dev, dd->irq, dd->pdata->intr_hdlr,
1928                                IRQF_TRIGGER_NONE, dev_name(dev), dd);
1929         if (err) {
1930                 dev_err(dev, "unable to request irq %d, err = %d\n",
1931                         dd->irq, err);
1932                 goto data_err;
1933         }
1934
1935         dma_cap_zero(mask);
1936         dma_cap_set(DMA_SLAVE, mask);
1937
1938         dd->dma_lch = dma_request_slave_channel_compat(mask, omap_dma_filter_fn,
1939                                                        &dd->dma, dev, "rx");
1940         if (!dd->dma_lch) {
1941                 dd->polling_mode = 1;
1942                 dev_dbg(dev, "using polling mode instead of dma\n");
1943         }
1944
1945         dd->flags |= dd->pdata->flags;
1946
1947         pm_runtime_enable(dev);
1948         pm_runtime_get_sync(dev);
1949         rev = omap_sham_read(dd, SHA_REG_REV(dd));
1950         pm_runtime_put_sync(&pdev->dev);
1951
1952         dev_info(dev, "hw accel on OMAP rev %u.%u\n",
1953                 (rev & dd->pdata->major_mask) >> dd->pdata->major_shift,
1954                 (rev & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
1955
1956         spin_lock(&sham.lock);
1957         list_add_tail(&dd->list, &sham.dev_list);
1958         spin_unlock(&sham.lock);
1959
1960         for (i = 0; i < dd->pdata->algs_info_size; i++) {
1961                 for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
1962                         err = crypto_register_ahash(
1963                                         &dd->pdata->algs_info[i].algs_list[j]);
1964                         if (err)
1965                                 goto err_algs;
1966
1967                         dd->pdata->algs_info[i].registered++;
1968                 }
1969         }
1970
1971         return 0;
1972
1973 err_algs:
1974         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1975                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1976                         crypto_unregister_ahash(
1977                                         &dd->pdata->algs_info[i].algs_list[j]);
1978         pm_runtime_disable(dev);
1979         if (dd->dma_lch)
1980                 dma_release_channel(dd->dma_lch);
1981 data_err:
1982         dev_err(dev, "initialization failed.\n");
1983
1984         return err;
1985 }
1986
1987 static int omap_sham_remove(struct platform_device *pdev)
1988 {
1989         static struct omap_sham_dev *dd;
1990         int i, j;
1991
1992         dd = platform_get_drvdata(pdev);
1993         if (!dd)
1994                 return -ENODEV;
1995         spin_lock(&sham.lock);
1996         list_del(&dd->list);
1997         spin_unlock(&sham.lock);
1998         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1999                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
2000                         crypto_unregister_ahash(
2001                                         &dd->pdata->algs_info[i].algs_list[j]);
2002         tasklet_kill(&dd->done_task);
2003         pm_runtime_disable(&pdev->dev);
2004
2005         if (dd->dma_lch)
2006                 dma_release_channel(dd->dma_lch);
2007
2008         return 0;
2009 }
2010
2011 #ifdef CONFIG_PM_SLEEP
2012 static int omap_sham_suspend(struct device *dev)
2013 {
2014         pm_runtime_put_sync(dev);
2015         return 0;
2016 }
2017
2018 static int omap_sham_resume(struct device *dev)
2019 {
2020         pm_runtime_get_sync(dev);
2021         return 0;
2022 }
2023 #endif
2024
2025 static SIMPLE_DEV_PM_OPS(omap_sham_pm_ops, omap_sham_suspend, omap_sham_resume);
2026
2027 static struct platform_driver omap_sham_driver = {
2028         .probe  = omap_sham_probe,
2029         .remove = omap_sham_remove,
2030         .driver = {
2031                 .name   = "omap-sham",
2032                 .owner  = THIS_MODULE,
2033                 .pm     = &omap_sham_pm_ops,
2034                 .of_match_table = omap_sham_of_match,
2035         },
2036 };
2037
2038 module_platform_driver(omap_sham_driver);
2039
2040 MODULE_DESCRIPTION("OMAP SHA1/MD5 hw acceleration support.");
2041 MODULE_LICENSE("GPL v2");
2042 MODULE_AUTHOR("Dmitry Kasatkin");
2043 MODULE_ALIAS("platform:omap-sham");