drivers/crypto/talitos.c

   1 /*
   2  * talitos - Freescale Integrated Security Engine (SEC) device driver
   3  *
   4  * Copyright (c) 2008-2010 Freescale Semiconductor, Inc.
   5  *
   6  * Scatterlist Crypto API glue code copied from files with the following:
   7  * Copyright (c) 2006-2007 Herbert Xu <herbert@gondor.apana.org.au>
   8  *
   9  * Crypto algorithm registration code copied from hifn driver:
  10  * 2007+ Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
  11  * All rights reserved.
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  26  */
  27
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/mod_devicetable.h>
  31 #include <linux/device.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/crypto.h>
  34 #include <linux/hw_random.h>
  35 #include <linux/of_platform.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/io.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/rtnetlink.h>
  40 #include <linux/slab.h>
  41
  42 #include <crypto/algapi.h>
  43 #include <crypto/aes.h>
  44 #include <crypto/des.h>
  45 #include <crypto/sha.h>
  46 #include <crypto/md5.h>
  47 #include <crypto/aead.h>
  48 #include <crypto/authenc.h>
  49 #include <crypto/skcipher.h>
  50 #include <crypto/hash.h>
  51 #include <crypto/internal/hash.h>
  52 #include <crypto/scatterwalk.h>
  53
  54 #include "talitos.h"
  55
  56 #define TALITOS_TIMEOUT 100000
  57 #define TALITOS_MAX_DATA_LEN 65535
  58
  59 #define DESC_TYPE(desc_hdr) ((be32_to_cpu(desc_hdr) >> 3) & 0x1f)
  60 #define PRIMARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 28) & 0xf)
  61 #define SECONDARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 16) & 0xf)
  62
  63 /* descriptor pointer entry */
  64 struct talitos_ptr {
  65         __be16 len;     /* length */
  66         u8 j_extent;    /* jump to sg link table and/or extent */
  67         u8 eptr;        /* extended address */
  68         __be32 ptr;     /* address */
  69 };
  70
  71 static const struct talitos_ptr zero_entry = {
  72         .len = 0,
  73         .j_extent = 0,
  74         .eptr = 0,
  75         .ptr = 0
  76 };
  77
  78 /* descriptor */
  79 struct talitos_desc {
  80         __be32 hdr;                     /* header high bits */
  81         __be32 hdr_lo;                  /* header low bits */
  82         struct talitos_ptr ptr[7];      /* ptr/len pair array */
  83 };
  84
  85 /**
  86  * talitos_request - descriptor submission request
  87  * @desc: descriptor pointer (kernel virtual)
  88  * @dma_desc: descriptor's physical bus address
  89  * @callback: whom to call when descriptor processing is done
  90  * @context: caller context (optional)
  91  */
  92 struct talitos_request {
  93         struct talitos_desc *desc;
  94         dma_addr_t dma_desc;
  95         void (*callback) (struct device *dev, struct talitos_desc *desc,
  96                           void *context, int error);
  97         void *context;
  98 };
  99
 100 /* per-channel fifo management */
 101 struct talitos_channel {
 102         /* request fifo */
 103         struct talitos_request *fifo;
 104
 105         /* number of requests pending in channel h/w fifo */
 106         atomic_t submit_count ____cacheline_aligned;
 107
 108         /* request submission (head) lock */
 109         spinlock_t head_lock ____cacheline_aligned;
 110         /* index to next free descriptor request */
 111         int head;
 112
 113         /* request release (tail) lock */
 114         spinlock_t tail_lock ____cacheline_aligned;
 115         /* index to next in-progress/done descriptor request */
 116         int tail;
 117 };
 118
 119 struct talitos_private {
 120         struct device *dev;
 121         struct of_device *ofdev;
 122         void __iomem *reg;
 123         int irq;
 124
 125         /* SEC version geometry (from device tree node) */
 126         unsigned int num_channels;
 127         unsigned int chfifo_len;
 128         unsigned int exec_units;
 129         unsigned int desc_types;
 130
 131         /* SEC Compatibility info */
 132         unsigned long features;
 133
 134         /*
 135          * length of the request fifo
 136          * fifo_len is chfifo_len rounded up to next power of 2
 137          * so we can use bitwise ops to wrap
 138          */
 139         unsigned int fifo_len;
 140
 141         struct talitos_channel *chan;
 142
 143         /* next channel to be assigned next incoming descriptor */
 144         atomic_t last_chan ____cacheline_aligned;
 145
 146         /* request callback tasklet */
 147         struct tasklet_struct done_task;
 148
 149         /* list of registered algorithms */
 150         struct list_head alg_list;
 151
 152         /* hwrng device */
 153         struct hwrng rng;
 154 };
 155
 156 /* .features flag */
 157 #define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001
 158 #define TALITOS_FTR_HW_AUTH_CHECK 0x00000002
 159 #define TALITOS_FTR_SHA224_HWINIT 0x00000004
 160
 161 static void to_talitos_ptr(struct talitos_ptr *talitos_ptr, dma_addr_t dma_addr)
 162 {
 163         talitos_ptr->ptr = cpu_to_be32(lower_32_bits(dma_addr));
 164         talitos_ptr->eptr = cpu_to_be32(upper_32_bits(dma_addr));
 165 }
 166
 167 /*
 168  * map virtual single (contiguous) pointer to h/w descriptor pointer
 169  */
 170 static void map_single_talitos_ptr(struct device *dev,
 171                                    struct talitos_ptr *talitos_ptr,
 172                                    unsigned short len, void *data,
 173                                    unsigned char extent,
 174                                    enum dma_data_direction dir)
 175 {
 176         dma_addr_t dma_addr = dma_map_single(dev, data, len, dir);
 177
 178         talitos_ptr->len = cpu_to_be16(len);
 179         to_talitos_ptr(talitos_ptr, dma_addr);
 180         talitos_ptr->j_extent = extent;
 181 }
 182
 183 /*
 184  * unmap bus single (contiguous) h/w descriptor pointer
 185  */
 186 static void unmap_single_talitos_ptr(struct device *dev,
 187                                      struct talitos_ptr *talitos_ptr,
 188                                      enum dma_data_direction dir)
 189 {
 190         dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr),
 191                          be16_to_cpu(talitos_ptr->len), dir);
 192 }
 193
 194 static int reset_channel(struct device *dev, int ch)
 195 {
 196         struct talitos_private *priv = dev_get_drvdata(dev);
 197         unsigned int timeout = TALITOS_TIMEOUT;
 198
 199         setbits32(priv->reg + TALITOS_CCCR(ch), TALITOS_CCCR_RESET);
 200
 201         while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & TALITOS_CCCR_RESET)
 202                && --timeout)
 203                 cpu_relax();
 204
 205         if (timeout == 0) {
 206                 dev_err(dev, "failed to reset channel %d\n", ch);
 207                 return -EIO;
 208         }
 209
 210         /* set 36-bit addressing, done writeback enable and done IRQ enable */
 211         setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_EAE |
 212                   TALITOS_CCCR_LO_CDWE | TALITOS_CCCR_LO_CDIE);
 213
 214         /* and ICCR writeback, if available */
 215         if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
 216                 setbits32(priv->reg + TALITOS_CCCR_LO(ch),
 217                           TALITOS_CCCR_LO_IWSE);
 218
 219         return 0;
 220 }
 221
 222 static int reset_device(struct device *dev)
 223 {
 224         struct talitos_private *priv = dev_get_drvdata(dev);
 225         unsigned int timeout = TALITOS_TIMEOUT;
 226
 227         setbits32(priv->reg + TALITOS_MCR, TALITOS_MCR_SWR);
 228
 229         while ((in_be32(priv->reg + TALITOS_MCR) & TALITOS_MCR_SWR)
 230                && --timeout)
 231                 cpu_relax();
 232
 233         if (timeout == 0) {
 234                 dev_err(dev, "failed to reset device\n");
 235                 return -EIO;
 236         }
 237
 238         return 0;
 239 }
 240
 241 /*
 242  * Reset and initialize the device
 243  */
 244 static int init_device(struct device *dev)
 245 {
 246         struct talitos_private *priv = dev_get_drvdata(dev);
 247         int ch, err;
 248
 249         /*
 250          * Master reset
 251          * errata documentation: warning: certain SEC interrupts
 252          * are not fully cleared by writing the MCR:SWR bit,
 253          * set bit twice to completely reset
 254          */
 255         err = reset_device(dev);
 256         if (err)
 257                 return err;
 258
 259         err = reset_device(dev);
 260         if (err)
 261                 return err;
 262
 263         /* reset channels */
 264         for (ch = 0; ch < priv->num_channels; ch++) {
 265                 err = reset_channel(dev, ch);
 266                 if (err)
 267                         return err;
 268         }
 269
 270         /* enable channel done and error interrupts */
 271         setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT);
 272         setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT);
 273
 274         /* disable integrity check error interrupts (use writeback instead) */
 275         if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
 276                 setbits32(priv->reg + TALITOS_MDEUICR_LO,
 277                           TALITOS_MDEUICR_LO_ICE);
 278
 279         return 0;
 280 }
 281
 282 /**
 283  * talitos_submit - submits a descriptor to the device for processing
 284  * @dev:        the SEC device to be used
 285  * @desc:       the descriptor to be processed by the device
 286  * @callback:   whom to call when processing is complete
 287  * @context:    a handle for use by caller (optional)
 288  *
 289  * desc must contain valid dma-mapped (bus physical) address pointers.
 290  * callback must check err and feedback in descriptor header
 291  * for device processing status.
 292  */
 293 static int talitos_submit(struct device *dev, struct talitos_desc *desc,
 294                           void (*callback)(struct device *dev,
 295                                            struct talitos_desc *desc,
 296                                            void *context, int error),
 297                           void *context)
 298 {
 299         struct talitos_private *priv = dev_get_drvdata(dev);
 300         struct talitos_request *request;
 301         unsigned long flags, ch;
 302         int head;
 303
 304         /* select done notification */
 305         desc->hdr |= DESC_HDR_DONE_NOTIFY;
 306
 307         /* emulate SEC's round-robin channel fifo polling scheme */
 308         ch = atomic_inc_return(&priv->last_chan) & (priv->num_channels - 1);
 309
 310         spin_lock_irqsave(&priv->chan[ch].head_lock, flags);
 311
 312         if (!atomic_inc_not_zero(&priv->chan[ch].submit_count)) {
 313                 /* h/w fifo is full */
 314                 spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags);
 315                 return -EAGAIN;
 316         }
 317
 318         head = priv->chan[ch].head;
 319         request = &priv->chan[ch].fifo[head];
 320
 321         /* map descriptor and save caller data */
 322         request->dma_desc = dma_map_single(dev, desc, sizeof(*desc),
 323                                            DMA_BIDIRECTIONAL);
 324         request->callback = callback;
 325         request->context = context;
 326
 327         /* increment fifo head */
 328         priv->chan[ch].head = (priv->chan[ch].head + 1) & (priv->fifo_len - 1);
 329
 330         smp_wmb();
 331         request->desc = desc;
 332
 333         /* GO! */
 334         wmb();
 335         out_be32(priv->reg + TALITOS_FF(ch),
 336                  cpu_to_be32(upper_32_bits(request->dma_desc)));
 337         out_be32(priv->reg + TALITOS_FF_LO(ch),
 338                  cpu_to_be32(lower_32_bits(request->dma_desc)));
 339
 340         spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags);
 341
 342         return -EINPROGRESS;
 343 }
 344
 345 /*
 346  * process what was done, notify callback of error if not
 347  */
 348 static void flush_channel(struct device *dev, int ch, int error, int reset_ch)
 349 {
 350         struct talitos_private *priv = dev_get_drvdata(dev);
 351         struct talitos_request *request, saved_req;
 352         unsigned long flags;
 353         int tail, status;
 354
 355         spin_lock_irqsave(&priv->chan[ch].tail_lock, flags);
 356
 357         tail = priv->chan[ch].tail;
 358         while (priv->chan[ch].fifo[tail].desc) {
 359                 request = &priv->chan[ch].fifo[tail];
 360
 361                 /* descriptors with their done bits set don't get the error */
 362                 rmb();
 363                 if ((request->desc->hdr & DESC_HDR_DONE) == DESC_HDR_DONE)
 364                         status = 0;
 365                 else
 366                         if (!error)
 367                                 break;
 368                         else
 369                                 status = error;
 370
 371                 dma_unmap_single(dev, request->dma_desc,
 372                                  sizeof(struct talitos_desc),
 373                                  DMA_BIDIRECTIONAL);
 374
 375                 /* copy entries so we can call callback outside lock */
 376                 saved_req.desc = request->desc;
 377                 saved_req.callback = request->callback;
 378                 saved_req.context = request->context;
 379
 380                 /* release request entry in fifo */
 381                 smp_wmb();
 382                 request->desc = NULL;
 383
 384                 /* increment fifo tail */
 385                 priv->chan[ch].tail = (tail + 1) & (priv->fifo_len - 1);
 386
 387                 spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags);
 388
 389                 atomic_dec(&priv->chan[ch].submit_count);
 390
 391                 saved_req.callback(dev, saved_req.desc, saved_req.context,
 392                                    status);
 393                 /* channel may resume processing in single desc error case */
 394                 if (error && !reset_ch && status == error)
 395                         return;
 396                 spin_lock_irqsave(&priv->chan[ch].tail_lock, flags);
 397                 tail = priv->chan[ch].tail;
 398         }
 399
 400         spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags);
 401 }
 402
 403 /*
 404  * process completed requests for channels that have done status
 405  */
 406 static void talitos_done(unsigned long data)
 407 {
 408         struct device *dev = (struct device *)data;
 409         struct talitos_private *priv = dev_get_drvdata(dev);
 410         int ch;
 411
 412         for (ch = 0; ch < priv->num_channels; ch++)
 413                 flush_channel(dev, ch, 0, 0);
 414
 415         /* At this point, all completed channels have been processed.
 416          * Unmask done interrupts for channels completed later on.
 417          */
 418         setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT);
 419         setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT);
 420 }
 421
 422 /*
 423  * locate current (offending) descriptor
 424  */
 425 static struct talitos_desc *current_desc(struct device *dev, int ch)
 426 {
 427         struct talitos_private *priv = dev_get_drvdata(dev);
 428         int tail = priv->chan[ch].tail;
 429         dma_addr_t cur_desc;
 430
 431         cur_desc = in_be32(priv->reg + TALITOS_CDPR_LO(ch));
 432
 433         while (priv->chan[ch].fifo[tail].dma_desc != cur_desc) {
 434                 tail = (tail + 1) & (priv->fifo_len - 1);
 435                 if (tail == priv->chan[ch].tail) {
 436                         dev_err(dev, "couldn't locate current descriptor\n");
 437                         return NULL;
 438                 }
 439         }
 440
 441         return priv->chan[ch].fifo[tail].desc;
 442 }
 443
 444 /*
 445  * user diagnostics; report root cause of error based on execution unit status
 446  */
 447 static void report_eu_error(struct device *dev, int ch,
 448                             struct talitos_desc *desc)
 449 {
 450         struct talitos_private *priv = dev_get_drvdata(dev);
 451         int i;
 452
 453         switch (desc->hdr & DESC_HDR_SEL0_MASK) {
 454         case DESC_HDR_SEL0_AFEU:
 455                 dev_err(dev, "AFEUISR 0x%08x_%08x\n",
 456                         in_be32(priv->reg + TALITOS_AFEUISR),
 457                         in_be32(priv->reg + TALITOS_AFEUISR_LO));
 458                 break;
 459         case DESC_HDR_SEL0_DEU:
 460                 dev_err(dev, "DEUISR 0x%08x_%08x\n",
 461                         in_be32(priv->reg + TALITOS_DEUISR),
 462                         in_be32(priv->reg + TALITOS_DEUISR_LO));
 463                 break;
 464         case DESC_HDR_SEL0_MDEUA:
 465         case DESC_HDR_SEL0_MDEUB:
 466                 dev_err(dev, "MDEUISR 0x%08x_%08x\n",
 467                         in_be32(priv->reg + TALITOS_MDEUISR),
 468                         in_be32(priv->reg + TALITOS_MDEUISR_LO));
 469                 break;
 470         case DESC_HDR_SEL0_RNG:
 471                 dev_err(dev, "RNGUISR 0x%08x_%08x\n",
 472                         in_be32(priv->reg + TALITOS_RNGUISR),
 473                         in_be32(priv->reg + TALITOS_RNGUISR_LO));
 474                 break;
 475         case DESC_HDR_SEL0_PKEU:
 476                 dev_err(dev, "PKEUISR 0x%08x_%08x\n",
 477                         in_be32(priv->reg + TALITOS_PKEUISR),
 478                         in_be32(priv->reg + TALITOS_PKEUISR_LO));
 479                 break;
 480         case DESC_HDR_SEL0_AESU:
 481                 dev_err(dev, "AESUISR 0x%08x_%08x\n",
 482                         in_be32(priv->reg + TALITOS_AESUISR),
 483                         in_be32(priv->reg + TALITOS_AESUISR_LO));
 484                 break;
 485         case DESC_HDR_SEL0_CRCU:
 486                 dev_err(dev, "CRCUISR 0x%08x_%08x\n",
 487                         in_be32(priv->reg + TALITOS_CRCUISR),
 488                         in_be32(priv->reg + TALITOS_CRCUISR_LO));
 489                 break;
 490         case DESC_HDR_SEL0_KEU:
 491                 dev_err(dev, "KEUISR 0x%08x_%08x\n",
 492                         in_be32(priv->reg + TALITOS_KEUISR),
 493                         in_be32(priv->reg + TALITOS_KEUISR_LO));
 494                 break;
 495         }
 496
 497         switch (desc->hdr & DESC_HDR_SEL1_MASK) {
 498         case DESC_HDR_SEL1_MDEUA:
 499         case DESC_HDR_SEL1_MDEUB:
 500                 dev_err(dev, "MDEUISR 0x%08x_%08x\n",
 501                         in_be32(priv->reg + TALITOS_MDEUISR),
 502                         in_be32(priv->reg + TALITOS_MDEUISR_LO));
 503                 break;
 504         case DESC_HDR_SEL1_CRCU:
 505                 dev_err(dev, "CRCUISR 0x%08x_%08x\n",
 506                         in_be32(priv->reg + TALITOS_CRCUISR),
 507                         in_be32(priv->reg + TALITOS_CRCUISR_LO));
 508                 break;
 509         }
 510
 511         for (i = 0; i < 8; i++)
 512                 dev_err(dev, "DESCBUF 0x%08x_%08x\n",
 513                         in_be32(priv->reg + TALITOS_DESCBUF(ch) + 8*i),
 514                         in_be32(priv->reg + TALITOS_DESCBUF_LO(ch) + 8*i));
 515 }
 516
 517 /*
 518  * recover from error interrupts
 519  */
 520 static void talitos_error(unsigned long data, u32 isr, u32 isr_lo)
 521 {
 522         struct device *dev = (struct device *)data;
 523         struct talitos_private *priv = dev_get_drvdata(dev);
 524         unsigned int timeout = TALITOS_TIMEOUT;
 525         int ch, error, reset_dev = 0, reset_ch = 0;
 526         u32 v, v_lo;
 527
 528         for (ch = 0; ch < priv->num_channels; ch++) {
 529                 /* skip channels without errors */
 530                 if (!(isr & (1 << (ch * 2 + 1))))
 531                         continue;
 532
 533                 error = -EINVAL;
 534
 535                 v = in_be32(priv->reg + TALITOS_CCPSR(ch));
 536                 v_lo = in_be32(priv->reg + TALITOS_CCPSR_LO(ch));
 537
 538                 if (v_lo & TALITOS_CCPSR_LO_DOF) {
 539                         dev_err(dev, "double fetch fifo overflow error\n");
 540                         error = -EAGAIN;
 541                         reset_ch = 1;
 542                 }
 543                 if (v_lo & TALITOS_CCPSR_LO_SOF) {
 544                         /* h/w dropped descriptor */
 545                         dev_err(dev, "single fetch fifo overflow error\n");
 546                         error = -EAGAIN;
 547                 }
 548                 if (v_lo & TALITOS_CCPSR_LO_MDTE)
 549                         dev_err(dev, "master data transfer error\n");
 550                 if (v_lo & TALITOS_CCPSR_LO_SGDLZ)
 551                         dev_err(dev, "s/g data length zero error\n");
 552                 if (v_lo & TALITOS_CCPSR_LO_FPZ)
 553                         dev_err(dev, "fetch pointer zero error\n");
 554                 if (v_lo & TALITOS_CCPSR_LO_IDH)
 555                         dev_err(dev, "illegal descriptor header error\n");
 556                 if (v_lo & TALITOS_CCPSR_LO_IEU)
 557                         dev_err(dev, "invalid execution unit error\n");
 558                 if (v_lo & TALITOS_CCPSR_LO_EU)
 559                         report_eu_error(dev, ch, current_desc(dev, ch));
 560                 if (v_lo & TALITOS_CCPSR_LO_GB)
 561                         dev_err(dev, "gather boundary error\n");
 562                 if (v_lo & TALITOS_CCPSR_LO_GRL)
 563                         dev_err(dev, "gather return/length error\n");
 564                 if (v_lo & TALITOS_CCPSR_LO_SB)
 565                         dev_err(dev, "scatter boundary error\n");
 566                 if (v_lo & TALITOS_CCPSR_LO_SRL)
 567                         dev_err(dev, "scatter return/length error\n");
 568
 569                 flush_channel(dev, ch, error, reset_ch);
 570
 571                 if (reset_ch) {
 572                         reset_channel(dev, ch);
 573                 } else {
 574                         setbits32(priv->reg + TALITOS_CCCR(ch),
 575                                   TALITOS_CCCR_CONT);
 576                         setbits32(priv->reg + TALITOS_CCCR_LO(ch), 0);
 577                         while ((in_be32(priv->reg + TALITOS_CCCR(ch)) &
 578                                TALITOS_CCCR_CONT) && --timeout)
 579                                 cpu_relax();
 580                         if (timeout == 0) {
 581                                 dev_err(dev, "failed to restart channel %d\n",
 582                                         ch);
 583                                 reset_dev = 1;
 584                         }
 585                 }
 586         }
 587         if (reset_dev || isr & ~TALITOS_ISR_CHERR || isr_lo) {
 588                 dev_err(dev, "done overflow, internal time out, or rngu error: "
 589                         "ISR 0x%08x_%08x\n", isr, isr_lo);
 590
 591                 /* purge request queues */
 592                 for (ch = 0; ch < priv->num_channels; ch++)
 593                         flush_channel(dev, ch, -EIO, 1);
 594
 595                 /* reset and reinitialize the device */
 596                 init_device(dev);
 597         }
 598 }
 599
 600 static irqreturn_t talitos_interrupt(int irq, void *data)
 601 {
 602         struct device *dev = data;
 603         struct talitos_private *priv = dev_get_drvdata(dev);
 604         u32 isr, isr_lo;
 605
 606         isr = in_be32(priv->reg + TALITOS_ISR);
 607         isr_lo = in_be32(priv->reg + TALITOS_ISR_LO);
 608         /* Acknowledge interrupt */
 609         out_be32(priv->reg + TALITOS_ICR, isr);
 610         out_be32(priv->reg + TALITOS_ICR_LO, isr_lo);
 611
 612         if (unlikely((isr & ~TALITOS_ISR_CHDONE) || isr_lo))
 613                 talitos_error((unsigned long)data, isr, isr_lo);
 614         else
 615                 if (likely(isr & TALITOS_ISR_CHDONE)) {
 616                         /* mask further done interrupts. */
 617                         clrbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_DONE);
 618                         /* done_task will unmask done interrupts at exit */
 619                         tasklet_schedule(&priv->done_task);
 620                 }
 621
 622         return (isr || isr_lo) ? IRQ_HANDLED : IRQ_NONE;
 623 }
 624
 625 /*
 626  * hwrng
 627  */
 628 static int talitos_rng_data_present(struct hwrng *rng, int wait)
 629 {
 630         struct device *dev = (struct device *)rng->priv;
 631         struct talitos_private *priv = dev_get_drvdata(dev);
 632         u32 ofl;
 633         int i;
 634
 635         for (i = 0; i < 20; i++) {
 636                 ofl = in_be32(priv->reg + TALITOS_RNGUSR_LO) &
 637                       TALITOS_RNGUSR_LO_OFL;
 638                 if (ofl || !wait)
 639                         break;
 640                 udelay(10);
 641         }
 642
 643         return !!ofl;
 644 }
 645
 646 static int talitos_rng_data_read(struct hwrng *rng, u32 *data)
 647 {
 648         struct device *dev = (struct device *)rng->priv;
 649         struct talitos_private *priv = dev_get_drvdata(dev);
 650
 651         /* rng fifo requires 64-bit accesses */
 652         *data = in_be32(priv->reg + TALITOS_RNGU_FIFO);
 653         *data = in_be32(priv->reg + TALITOS_RNGU_FIFO_LO);
 654
 655         return sizeof(u32);
 656 }
 657
 658 static int talitos_rng_init(struct hwrng *rng)
 659 {
 660         struct device *dev = (struct device *)rng->priv;
 661         struct talitos_private *priv = dev_get_drvdata(dev);
 662         unsigned int timeout = TALITOS_TIMEOUT;
 663
 664         setbits32(priv->reg + TALITOS_RNGURCR_LO, TALITOS_RNGURCR_LO_SR);
 665         while (!(in_be32(priv->reg + TALITOS_RNGUSR_LO) & TALITOS_RNGUSR_LO_RD)
 666                && --timeout)
 667                 cpu_relax();
 668         if (timeout == 0) {
 669                 dev_err(dev, "failed to reset rng hw\n");
 670                 return -ENODEV;
 671         }
 672
 673         /* start generating */
 674         setbits32(priv->reg + TALITOS_RNGUDSR_LO, 0);
 675
 676         return 0;
 677 }
 678
 679 static int talitos_register_rng(struct device *dev)
 680 {
 681         struct talitos_private *priv = dev_get_drvdata(dev);
 682
 683         priv->rng.name          = dev_driver_string(dev),
 684         priv->rng.init          = talitos_rng_init,
 685         priv->rng.data_present  = talitos_rng_data_present,
 686         priv->rng.data_read     = talitos_rng_data_read,
 687         priv->rng.priv          = (unsigned long)dev;
 688
 689         return hwrng_register(&priv->rng);
 690 }
 691
 692 static void talitos_unregister_rng(struct device *dev)
 693 {
 694         struct talitos_private *priv = dev_get_drvdata(dev);
 695
 696         hwrng_unregister(&priv->rng);
 697 }
 698
 699 /*
 700  * crypto alg
 701  */
 702 #define TALITOS_CRA_PRIORITY            3000
 703 #define TALITOS_MAX_KEY_SIZE            64
 704 #define TALITOS_MAX_IV_LENGTH           16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
 705
 706 #define MD5_BLOCK_SIZE    64
 707
 708 struct talitos_ctx {
 709         struct device *dev;
 710         __be32 desc_hdr_template;
 711         u8 key[TALITOS_MAX_KEY_SIZE];
 712         u8 iv[TALITOS_MAX_IV_LENGTH];
 713         unsigned int keylen;
 714         unsigned int enckeylen;
 715         unsigned int authkeylen;
 716         unsigned int authsize;
 717 };
 718
 719 #define HASH_MAX_BLOCK_SIZE             SHA512_BLOCK_SIZE
 720 #define TALITOS_MDEU_MAX_CONTEXT_SIZE   TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512
 721
 722 struct talitos_ahash_req_ctx {
 723         u64 count;
 724         u32 hw_context[TALITOS_MDEU_MAX_CONTEXT_SIZE / sizeof(u32)];
 725         unsigned int hw_context_size;
 726         u8 buf[HASH_MAX_BLOCK_SIZE];
 727         u8 bufnext[HASH_MAX_BLOCK_SIZE];
 728         unsigned int swinit;
 729         unsigned int first;
 730         unsigned int last;
 731         unsigned int to_hash_later;
 732         struct scatterlist bufsl[2];
 733         struct scatterlist *psrc;
 734 };
 735
 736 static int aead_setauthsize(struct crypto_aead *authenc,
 737                             unsigned int authsize)
 738 {
 739         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
 740
 741         ctx->authsize = authsize;
 742
 743         return 0;
 744 }
 745
 746 static int aead_setkey(struct crypto_aead *authenc,
 747                        const u8 *key, unsigned int keylen)
 748 {
 749         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
 750         struct rtattr *rta = (void *)key;
 751         struct crypto_authenc_key_param *param;
 752         unsigned int authkeylen;
 753         unsigned int enckeylen;
 754
 755         if (!RTA_OK(rta, keylen))
 756                 goto badkey;
 757
 758         if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
 759                 goto badkey;
 760
 761         if (RTA_PAYLOAD(rta) < sizeof(*param))
 762                 goto badkey;
 763
 764         param = RTA_DATA(rta);
 765         enckeylen = be32_to_cpu(param->enckeylen);
 766
 767         key += RTA_ALIGN(rta->rta_len);
 768         keylen -= RTA_ALIGN(rta->rta_len);
 769
 770         if (keylen < enckeylen)
 771                 goto badkey;
 772
 773         authkeylen = keylen - enckeylen;
 774
 775         if (keylen > TALITOS_MAX_KEY_SIZE)
 776                 goto badkey;
 777
 778         memcpy(&ctx->key, key, keylen);
 779
 780         ctx->keylen = keylen;
 781         ctx->enckeylen = enckeylen;
 782         ctx->authkeylen = authkeylen;
 783
 784         return 0;
 785
 786 badkey:
 787         crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN);
 788         return -EINVAL;
 789 }
 790
 791 /*
 792  * talitos_edesc - s/w-extended descriptor
 793  * @src_nents: number of segments in input scatterlist
 794  * @dst_nents: number of segments in output scatterlist
 795  * @dma_len: length of dma mapped link_tbl space
 796  * @dma_link_tbl: bus physical address of link_tbl
 797  * @desc: h/w descriptor
 798  * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1)
 799  *
 800  * if decrypting (with authcheck), or either one of src_nents or dst_nents
 801  * is greater than 1, an integrity check value is concatenated to the end
 802  * of link_tbl data
 803  */
 804 struct talitos_edesc {
 805         int src_nents;
 806         int dst_nents;
 807         int src_is_chained;
 808         int dst_is_chained;
 809         int dma_len;
 810         dma_addr_t dma_link_tbl;
 811         struct talitos_desc desc;
 812         struct talitos_ptr link_tbl[0];
 813 };
 814
 815 static int talitos_map_sg(struct device *dev, struct scatterlist *sg,
 816                           unsigned int nents, enum dma_data_direction dir,
 817                           int chained)
 818 {
 819         if (unlikely(chained))
 820                 while (sg) {
 821                         dma_map_sg(dev, sg, 1, dir);
 822                         sg = scatterwalk_sg_next(sg);
 823                 }
 824         else
 825                 dma_map_sg(dev, sg, nents, dir);
 826         return nents;
 827 }
 828
 829 static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg,
 830                                    enum dma_data_direction dir)
 831 {
 832         while (sg) {
 833                 dma_unmap_sg(dev, sg, 1, dir);
 834                 sg = scatterwalk_sg_next(sg);
 835         }
 836 }
 837
 838 static void talitos_sg_unmap(struct device *dev,
 839                              struct talitos_edesc *edesc,
 840                              struct scatterlist *src,
 841                              struct scatterlist *dst)
 842 {
 843         unsigned int src_nents = edesc->src_nents ? : 1;
 844         unsigned int dst_nents = edesc->dst_nents ? : 1;
 845
 846         if (src != dst) {
 847                 if (edesc->src_is_chained)
 848                         talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE);
 849                 else
 850                         dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
 851
 852                 if (dst) {
 853                         if (edesc->dst_is_chained)
 854                                 talitos_unmap_sg_chain(dev, dst,
 855                                                        DMA_FROM_DEVICE);
 856                         else
 857                                 dma_unmap_sg(dev, dst, dst_nents,
 858                                              DMA_FROM_DEVICE);
 859                 }
 860         } else
 861                 if (edesc->src_is_chained)
 862                         talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL);
 863                 else
 864                         dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
 865 }
 866
 867 static void ipsec_esp_unmap(struct device *dev,
 868                             struct talitos_edesc *edesc,
 869                             struct aead_request *areq)
 870 {
 871         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE);
 872         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE);
 873         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
 874         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE);
 875
 876         dma_unmap_sg(dev, areq->assoc, 1, DMA_TO_DEVICE);
 877
 878         talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
 879
 880         if (edesc->dma_len)
 881                 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
 882                                  DMA_BIDIRECTIONAL);
 883 }
 884
 885 /*
 886  * ipsec_esp descriptor callbacks
 887  */
 888 static void ipsec_esp_encrypt_done(struct device *dev,
 889                                    struct talitos_desc *desc, void *context,
 890                                    int err)
 891 {
 892         struct aead_request *areq = context;
 893         struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
 894         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
 895         struct talitos_edesc *edesc;
 896         struct scatterlist *sg;
 897         void *icvdata;
 898
 899         edesc = container_of(desc, struct talitos_edesc, desc);
 900
 901         ipsec_esp_unmap(dev, edesc, areq);
 902
 903         /* copy the generated ICV to dst */
 904         if (edesc->dma_len) {
 905                 icvdata = &edesc->link_tbl[edesc->src_nents +
 906                                            edesc->dst_nents + 2];
 907                 sg = sg_last(areq->dst, edesc->dst_nents);
 908                 memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize,
 909                        icvdata, ctx->authsize);
 910         }
 911
 912         kfree(edesc);
 913
 914         aead_request_complete(areq, err);
 915 }
 916
 917 static void ipsec_esp_decrypt_swauth_done(struct device *dev,
 918                                           struct talitos_desc *desc,
 919                                           void *context, int err)
 920 {
 921         struct aead_request *req = context;
 922         struct crypto_aead *authenc = crypto_aead_reqtfm(req);
 923         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
 924         struct talitos_edesc *edesc;
 925         struct scatterlist *sg;
 926         void *icvdata;
 927
 928         edesc = container_of(desc, struct talitos_edesc, desc);
 929
 930         ipsec_esp_unmap(dev, edesc, req);
 931
 932         if (!err) {
 933                 /* auth check */
 934                 if (edesc->dma_len)
 935                         icvdata = &edesc->link_tbl[edesc->src_nents +
 936                                                    edesc->dst_nents + 2];
 937                 else
 938                         icvdata = &edesc->link_tbl[0];
 939
 940                 sg = sg_last(req->dst, edesc->dst_nents ? : 1);
 941                 err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length -
 942                              ctx->authsize, ctx->authsize) ? -EBADMSG : 0;
 943         }
 944
 945         kfree(edesc);
 946
 947         aead_request_complete(req, err);
 948 }
 949
 950 static void ipsec_esp_decrypt_hwauth_done(struct device *dev,
 951                                           struct talitos_desc *desc,
 952                                           void *context, int err)
 953 {
 954         struct aead_request *req = context;
 955         struct talitos_edesc *edesc;
 956
 957         edesc = container_of(desc, struct talitos_edesc, desc);
 958
 959         ipsec_esp_unmap(dev, edesc, req);
 960
 961         /* check ICV auth status */
 962         if (!err && ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) !=
 963                      DESC_HDR_LO_ICCR1_PASS))
 964                 err = -EBADMSG;
 965
 966         kfree(edesc);
 967
 968         aead_request_complete(req, err);
 969 }
 970
 971 /*
 972  * convert scatterlist to SEC h/w link table format
 973  * stop at cryptlen bytes
 974  */
 975 static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
 976                            int cryptlen, struct talitos_ptr *link_tbl_ptr)
 977 {
 978         int n_sg = sg_count;
 979
 980         while (n_sg--) {
 981                 to_talitos_ptr(link_tbl_ptr, sg_dma_address(sg));
 982                 link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg));
 983                 link_tbl_ptr->j_extent = 0;
 984                 link_tbl_ptr++;
 985                 cryptlen -= sg_dma_len(sg);
 986                 sg = scatterwalk_sg_next(sg);
 987         }
 988
 989         /* adjust (decrease) last one (or two) entry's len to cryptlen */
 990         link_tbl_ptr--;
 991         while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) {
 992                 /* Empty this entry, and move to previous one */
 993                 cryptlen += be16_to_cpu(link_tbl_ptr->len);
 994                 link_tbl_ptr->len = 0;
 995                 sg_count--;
 996                 link_tbl_ptr--;
 997         }
 998         link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len)
 999                                         + cryptlen);
1000
1001         /* tag end of link table */
1002         link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
1003
1004         return sg_count;
1005 }
1006
1007 /*
1008  * fill in and submit ipsec_esp descriptor
1009  */
1010 static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
1011                      u8 *giv, u64 seq,
1012                      void (*callback) (struct device *dev,
1013                                        struct talitos_desc *desc,
1014                                        void *context, int error))
1015 {
1016         struct crypto_aead *aead = crypto_aead_reqtfm(areq);
1017         struct talitos_ctx *ctx = crypto_aead_ctx(aead);
1018         struct device *dev = ctx->dev;
1019         struct talitos_desc *desc = &edesc->desc;
1020         unsigned int cryptlen = areq->cryptlen;
1021         unsigned int authsize = ctx->authsize;
1022         unsigned int ivsize = crypto_aead_ivsize(aead);
1023         int sg_count, ret;
1024         int sg_link_tbl_len;
1025
1026         /* hmac key */
1027         map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
1028                                0, DMA_TO_DEVICE);
1029         /* hmac data */
1030         map_single_talitos_ptr(dev, &desc->ptr[1], areq->assoclen + ivsize,
1031                                sg_virt(areq->assoc), 0, DMA_TO_DEVICE);
1032         /* cipher iv */
1033         map_single_talitos_ptr(dev, &desc->ptr[2], ivsize, giv ?: areq->iv, 0,
1034                                DMA_TO_DEVICE);
1035
1036         /* cipher key */
1037         map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen,
1038                                (char *)&ctx->key + ctx->authkeylen, 0,
1039                                DMA_TO_DEVICE);
1040
1041         /*
1042          * cipher in
1043          * map and adjust cipher len to aead request cryptlen.
1044          * extent is bytes of HMAC postpended to ciphertext,
1045          * typically 12 for ipsec
1046          */
1047         desc->ptr[4].len = cpu_to_be16(cryptlen);
1048         desc->ptr[4].j_extent = authsize;
1049
1050         sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
1051                                   (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
1052                                                            : DMA_TO_DEVICE,
1053                                   edesc->src_is_chained);
1054
1055         if (sg_count == 1) {
1056                 to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src));
1057         } else {
1058                 sg_link_tbl_len = cryptlen;
1059
1060                 if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV)
1061                         sg_link_tbl_len = cryptlen + authsize;
1062
1063                 sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len,
1064                                           &edesc->link_tbl[0]);
1065                 if (sg_count > 1) {
1066                         desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
1067                         to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl);
1068                         dma_sync_single_for_device(dev, edesc->dma_link_tbl,
1069                                                    edesc->dma_len,
1070                                                    DMA_BIDIRECTIONAL);
1071                 } else {
1072                         /* Only one segment now, so no link tbl needed */
1073                         to_talitos_ptr(&desc->ptr[4],
1074                                        sg_dma_address(areq->src));
1075                 }
1076         }
1077
1078         /* cipher out */
1079         desc->ptr[5].len = cpu_to_be16(cryptlen);
1080         desc->ptr[5].j_extent = authsize;
1081
1082         if (areq->src != areq->dst)
1083                 sg_count = talitos_map_sg(dev, areq->dst,
1084                                           edesc->dst_nents ? : 1,
1085                                           DMA_FROM_DEVICE,
1086                                           edesc->dst_is_chained);
1087
1088         if (sg_count == 1) {
1089                 to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst));
1090         } else {
1091                 struct talitos_ptr *link_tbl_ptr =
1092                         &edesc->link_tbl[edesc->src_nents + 1];
1093
1094                 to_talitos_ptr(&desc->ptr[5], edesc->dma_link_tbl +
1095                                (edesc->src_nents + 1) *
1096                                sizeof(struct talitos_ptr));
1097                 sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
1098                                           link_tbl_ptr);
1099
1100                 /* Add an entry to the link table for ICV data */
1101                 link_tbl_ptr += sg_count - 1;
1102                 link_tbl_ptr->j_extent = 0;
1103                 sg_count++;
1104                 link_tbl_ptr++;
1105                 link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
1106                 link_tbl_ptr->len = cpu_to_be16(authsize);
1107
1108                 /* icv data follows link tables */
1109                 to_talitos_ptr(link_tbl_ptr, edesc->dma_link_tbl +
1110                                (edesc->src_nents + edesc->dst_nents + 2) *
1111                                sizeof(struct talitos_ptr));
1112                 desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP;
1113                 dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
1114                                            edesc->dma_len, DMA_BIDIRECTIONAL);
1115         }
1116
1117         /* iv out */
1118         map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0,
1119                                DMA_FROM_DEVICE);
1120
1121         ret = talitos_submit(dev, desc, callback, areq);
1122         if (ret != -EINPROGRESS) {
1123                 ipsec_esp_unmap(dev, edesc, areq);
1124                 kfree(edesc);
1125         }
1126         return ret;
1127 }
1128
1129 /*
1130  * derive number of elements in scatterlist
1131  */
1132 static int sg_count(struct scatterlist *sg_list, int nbytes, int *chained)
1133 {
1134         struct scatterlist *sg = sg_list;
1135         int sg_nents = 0;
1136
1137         *chained = 0;
1138         while (nbytes > 0) {
1139                 sg_nents++;
1140                 nbytes -= sg->length;
1141                 if (!sg_is_last(sg) && (sg + 1)->length == 0)
1142                         *chained = 1;
1143                 sg = scatterwalk_sg_next(sg);
1144         }
1145
1146         return sg_nents;
1147 }
1148
1149 /**
1150  * sg_copy_end_to_buffer - Copy end data from SG list to a linear buffer
1151  * @sgl:                 The SG list
1152  * @nents:               Number of SG entries
1153  * @buf:                 Where to copy to
1154  * @buflen:              The number of bytes to copy
1155  * @skip:                The number of bytes to skip before copying.
1156  *                       Note: skip + buflen should equal SG total size.
1157  *
1158  * Returns the number of copied bytes.
1159  *
1160  **/
1161 static size_t sg_copy_end_to_buffer(struct scatterlist *sgl, unsigned int nents,
1162                                     void *buf, size_t buflen, unsigned int skip)
1163 {
1164         unsigned int offset = 0;
1165         unsigned int boffset = 0;
1166         struct sg_mapping_iter miter;
1167         unsigned long flags;
1168         unsigned int sg_flags = SG_MITER_ATOMIC;
1169         size_t total_buffer = buflen + skip;
1170
1171         sg_flags |= SG_MITER_FROM_SG;
1172
1173         sg_miter_start(&miter, sgl, nents, sg_flags);
1174
1175         local_irq_save(flags);
1176
1177         while (sg_miter_next(&miter) && offset < total_buffer) {
1178                 unsigned int len;
1179                 unsigned int ignore;
1180
1181                 if ((offset + miter.length) > skip) {
1182                         if (offset < skip) {
1183                                 /* Copy part of this segment */
1184                                 ignore = skip - offset;
1185                                 len = miter.length - ignore;
1186                                 if (boffset + len > buflen)
1187                                         len = buflen - boffset;
1188                                 memcpy(buf + boffset, miter.addr + ignore, len);
1189                         } else {
1190                                 /* Copy all of this segment (up to buflen) */
1191                                 len = miter.length;
1192                                 if (boffset + len > buflen)
1193                                         len = buflen - boffset;
1194                                 memcpy(buf + boffset, miter.addr, len);
1195                         }
1196                         boffset += len;
1197                 }
1198                 offset += miter.length;
1199         }
1200
1201         sg_miter_stop(&miter);
1202
1203         local_irq_restore(flags);
1204         return boffset;
1205 }
1206
1207 /*
1208  * allocate and map the extended descriptor
1209  */
1210 static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
1211                                                  struct scatterlist *src,
1212                                                  struct scatterlist *dst,
1213                                                  int hash_result,
1214                                                  unsigned int cryptlen,
1215                                                  unsigned int authsize,
1216                                                  int icv_stashing,
1217                                                  u32 cryptoflags)
1218 {
1219         struct talitos_edesc *edesc;
1220         int src_nents, dst_nents, alloc_len, dma_len;
1221         int src_chained, dst_chained = 0;
1222         gfp_t flags = cryptoflags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
1223                       GFP_ATOMIC;
1224
1225         if (cryptlen + authsize > TALITOS_MAX_DATA_LEN) {
1226                 dev_err(dev, "length exceeds h/w max limit\n");
1227                 return ERR_PTR(-EINVAL);
1228         }
1229
1230         src_nents = sg_count(src, cryptlen + authsize, &src_chained);
1231         src_nents = (src_nents == 1) ? 0 : src_nents;
1232
1233         if (hash_result) {
1234                 dst_nents = 0;
1235         } else {
1236                 if (dst == src) {
1237                         dst_nents = src_nents;
1238                 } else {
1239                         dst_nents = sg_count(dst, cryptlen + authsize,
1240                                              &dst_chained);
1241                         dst_nents = (dst_nents == 1) ? 0 : dst_nents;
1242                 }
1243         }
1244
1245         /*
1246          * allocate space for base edesc plus the link tables,
1247          * allowing for two separate entries for ICV and generated ICV (+ 2),
1248          * and the ICV data itself
1249          */
1250         alloc_len = sizeof(struct talitos_edesc);
1251         if (src_nents || dst_nents) {
1252                 dma_len = (src_nents + dst_nents + 2) *
1253                                  sizeof(struct talitos_ptr) + authsize;
1254                 alloc_len += dma_len;
1255         } else {
1256                 dma_len = 0;
1257                 alloc_len += icv_stashing ? authsize : 0;
1258         }
1259
1260         edesc = kmalloc(alloc_len, GFP_DMA | flags);
1261         if (!edesc) {
1262                 dev_err(dev, "could not allocate edescriptor\n");
1263                 return ERR_PTR(-ENOMEM);
1264         }
1265
1266         edesc->src_nents = src_nents;
1267         edesc->dst_nents = dst_nents;
1268         edesc->src_is_chained = src_chained;
1269         edesc->dst_is_chained = dst_chained;
1270         edesc->dma_len = dma_len;
1271         if (dma_len)
1272                 edesc->dma_link_tbl = dma_map_single(dev, &edesc->link_tbl[0],
1273                                                      edesc->dma_len,
1274                                                      DMA_BIDIRECTIONAL);
1275
1276         return edesc;
1277 }
1278
1279 static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq,
1280                                               int icv_stashing)
1281 {
1282         struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
1283         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1284
1285         return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, 0,
1286                                    areq->cryptlen, ctx->authsize, icv_stashing,
1287                                    areq->base.flags);
1288 }
1289
1290 static int aead_encrypt(struct aead_request *req)
1291 {
1292         struct crypto_aead *authenc = crypto_aead_reqtfm(req);
1293         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1294         struct talitos_edesc *edesc;
1295
1296         /* allocate extended descriptor */
1297         edesc = aead_edesc_alloc(req, 0);
1298         if (IS_ERR(edesc))
1299                 return PTR_ERR(edesc);
1300
1301         /* set encrypt */
1302         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1303
1304         return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_encrypt_done);
1305 }
1306
1307 static int aead_decrypt(struct aead_request *req)
1308 {
1309         struct crypto_aead *authenc = crypto_aead_reqtfm(req);
1310         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1311         unsigned int authsize = ctx->authsize;
1312         struct talitos_private *priv = dev_get_drvdata(ctx->dev);
1313         struct talitos_edesc *edesc;
1314         struct scatterlist *sg;
1315         void *icvdata;
1316
1317         req->cryptlen -= authsize;
1318
1319         /* allocate extended descriptor */
1320         edesc = aead_edesc_alloc(req, 1);
1321         if (IS_ERR(edesc))
1322                 return PTR_ERR(edesc);
1323
1324         if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) &&
1325             ((!edesc->src_nents && !edesc->dst_nents) ||
1326              priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT)) {
1327
1328                 /* decrypt and check the ICV */
1329                 edesc->desc.hdr = ctx->desc_hdr_template |
1330                                   DESC_HDR_DIR_INBOUND |
1331                                   DESC_HDR_MODE1_MDEU_CICV;
1332
1333                 /* reset integrity check result bits */
1334                 edesc->desc.hdr_lo = 0;
1335
1336                 return ipsec_esp(edesc, req, NULL, 0,
1337                                  ipsec_esp_decrypt_hwauth_done);
1338
1339         }
1340
1341         /* Have to check the ICV with software */
1342         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
1343
1344         /* stash incoming ICV for later cmp with ICV generated by the h/w */
1345         if (edesc->dma_len)
1346                 icvdata = &edesc->link_tbl[edesc->src_nents +
1347                                            edesc->dst_nents + 2];
1348         else
1349                 icvdata = &edesc->link_tbl[0];
1350
1351         sg = sg_last(req->src, edesc->src_nents ? : 1);
1352
1353         memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize,
1354                ctx->authsize);
1355
1356         return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_swauth_done);
1357 }
1358
1359 static int aead_givencrypt(struct aead_givcrypt_request *req)
1360 {
1361         struct aead_request *areq = &req->areq;
1362         struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
1363         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1364         struct talitos_edesc *edesc;
1365
1366         /* allocate extended descriptor */
1367         edesc = aead_edesc_alloc(areq, 0);
1368         if (IS_ERR(edesc))
1369                 return PTR_ERR(edesc);
1370
1371         /* set encrypt */
1372         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1373
1374         memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
1375         /* avoid consecutive packets going out with same IV */
1376         *(__be64 *)req->giv ^= cpu_to_be64(req->seq);
1377
1378         return ipsec_esp(edesc, areq, req->giv, req->seq,
1379                          ipsec_esp_encrypt_done);
1380 }
1381
1382 static int ablkcipher_setkey(struct crypto_ablkcipher *cipher,
1383                              const u8 *key, unsigned int keylen)
1384 {
1385         struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1386         struct ablkcipher_alg *alg = crypto_ablkcipher_alg(cipher);
1387
1388         if (keylen > TALITOS_MAX_KEY_SIZE)
1389                 goto badkey;
1390
1391         if (keylen < alg->min_keysize || keylen > alg->max_keysize)
1392                 goto badkey;
1393
1394         memcpy(&ctx->key, key, keylen);
1395         ctx->keylen = keylen;
1396
1397         return 0;
1398
1399 badkey:
1400         crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
1401         return -EINVAL;
1402 }
1403
1404 static void common_nonsnoop_unmap(struct device *dev,
1405                                   struct talitos_edesc *edesc,
1406                                   struct ablkcipher_request *areq)
1407 {
1408         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
1409         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
1410         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1], DMA_TO_DEVICE);
1411
1412         talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
1413
1414         if (edesc->dma_len)
1415                 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
1416                                  DMA_BIDIRECTIONAL);
1417 }
1418
1419 static void ablkcipher_done(struct device *dev,
1420                             struct talitos_desc *desc, void *context,
1421                             int err)
1422 {
1423         struct ablkcipher_request *areq = context;
1424         struct talitos_edesc *edesc;
1425
1426         edesc = container_of(desc, struct talitos_edesc, desc);
1427
1428         common_nonsnoop_unmap(dev, edesc, areq);
1429
1430         kfree(edesc);
1431
1432         areq->base.complete(&areq->base, err);
1433 }
1434
1435 static int common_nonsnoop(struct talitos_edesc *edesc,
1436                            struct ablkcipher_request *areq,
1437                            u8 *giv,
1438                            void (*callback) (struct device *dev,
1439                                              struct talitos_desc *desc,
1440                                              void *context, int error))
1441 {
1442         struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1443         struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1444         struct device *dev = ctx->dev;
1445         struct talitos_desc *desc = &edesc->desc;
1446         unsigned int cryptlen = areq->nbytes;
1447         unsigned int ivsize;
1448         int sg_count, ret;
1449
1450         /* first DWORD empty */
1451         desc->ptr[0].len = 0;
1452         to_talitos_ptr(&desc->ptr[0], 0);
1453         desc->ptr[0].j_extent = 0;
1454
1455         /* cipher iv */
1456         ivsize = crypto_ablkcipher_ivsize(cipher);
1457         map_single_talitos_ptr(dev, &desc->ptr[1], ivsize, giv ?: areq->info, 0,
1458                                DMA_TO_DEVICE);
1459
1460         /* cipher key */
1461         map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
1462                                (char *)&ctx->key, 0, DMA_TO_DEVICE);
1463
1464         /*
1465          * cipher in
1466          */
1467         desc->ptr[3].len = cpu_to_be16(cryptlen);
1468         desc->ptr[3].j_extent = 0;
1469
1470         sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
1471                                   (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
1472                                                            : DMA_TO_DEVICE,
1473                                   edesc->src_is_chained);
1474
1475         if (sg_count == 1) {
1476                 to_talitos_ptr(&desc->ptr[3], sg_dma_address(areq->src));
1477         } else {
1478                 sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen,
1479                                           &edesc->link_tbl[0]);
1480                 if (sg_count > 1) {
1481                         to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
1482                         desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
1483                         dma_sync_single_for_device(dev, edesc->dma_link_tbl,
1484                                                    edesc->dma_len,
1485                                                    DMA_BIDIRECTIONAL);
1486                 } else {
1487                         /* Only one segment now, so no link tbl needed */
1488                         to_talitos_ptr(&desc->ptr[3],
1489                                        sg_dma_address(areq->src));
1490                 }
1491         }
1492
1493         /* cipher out */
1494         desc->ptr[4].len = cpu_to_be16(cryptlen);
1495         desc->ptr[4].j_extent = 0;
1496
1497         if (areq->src != areq->dst)
1498                 sg_count = talitos_map_sg(dev, areq->dst,
1499                                           edesc->dst_nents ? : 1,
1500                                           DMA_FROM_DEVICE,
1501                                           edesc->dst_is_chained);
1502
1503         if (sg_count == 1) {
1504                 to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->dst));
1505         } else {
1506                 struct talitos_ptr *link_tbl_ptr =
1507                         &edesc->link_tbl[edesc->src_nents + 1];
1508
1509                 to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl +
1510                                               (edesc->src_nents + 1) *
1511                                               sizeof(struct talitos_ptr));
1512                 desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
1513                 sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
1514                                           link_tbl_ptr);
1515                 dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
1516                                            edesc->dma_len, DMA_BIDIRECTIONAL);
1517         }
1518
1519         /* iv out */
1520         map_single_talitos_ptr(dev, &desc->ptr[5], ivsize, ctx->iv, 0,
1521                                DMA_FROM_DEVICE);
1522
1523         /* last DWORD empty */
1524         desc->ptr[6].len = 0;
1525         to_talitos_ptr(&desc->ptr[6], 0);
1526         desc->ptr[6].j_extent = 0;
1527
1528         ret = talitos_submit(dev, desc, callback, areq);
1529         if (ret != -EINPROGRESS) {
1530                 common_nonsnoop_unmap(dev, edesc, areq);
1531                 kfree(edesc);
1532         }
1533         return ret;
1534 }
1535
1536 static struct talitos_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request *
1537                                                     areq)
1538 {
1539         struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1540         struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1541
1542         return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, 0,
1543                                    areq->nbytes, 0, 0, areq->base.flags);
1544 }
1545
1546 static int ablkcipher_encrypt(struct ablkcipher_request *areq)
1547 {
1548         struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1549         struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1550         struct talitos_edesc *edesc;
1551
1552         /* allocate extended descriptor */
1553         edesc = ablkcipher_edesc_alloc(areq);
1554         if (IS_ERR(edesc))
1555                 return PTR_ERR(edesc);
1556
1557         /* set encrypt */
1558         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1559
1560         return common_nonsnoop(edesc, areq, NULL, ablkcipher_done);
1561 }
1562
1563 static int ablkcipher_decrypt(struct ablkcipher_request *areq)
1564 {
1565         struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1566         struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1567         struct talitos_edesc *edesc;
1568
1569         /* allocate extended descriptor */
1570         edesc = ablkcipher_edesc_alloc(areq);
1571         if (IS_ERR(edesc))
1572                 return PTR_ERR(edesc);
1573
1574         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
1575
1576         return common_nonsnoop(edesc, areq, NULL, ablkcipher_done);
1577 }
1578
1579 static void common_nonsnoop_hash_unmap(struct device *dev,
1580                                        struct talitos_edesc *edesc,
1581                                        struct ahash_request *areq)
1582 {
1583         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1584
1585         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
1586
1587         /* When using hashctx-in, must unmap it. */
1588         if (edesc->desc.ptr[1].len)
1589                 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1],
1590                                          DMA_TO_DEVICE);
1591
1592         if (edesc->desc.ptr[2].len)
1593                 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2],
1594                                          DMA_TO_DEVICE);
1595
1596         talitos_sg_unmap(dev, edesc, req_ctx->psrc, NULL);
1597
1598         if (edesc->dma_len)
1599                 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
1600                                  DMA_BIDIRECTIONAL);
1601
1602 }
1603
1604 static void ahash_done(struct device *dev,
1605                        struct talitos_desc *desc, void *context,
1606                        int err)
1607 {
1608         struct ahash_request *areq = context;
1609         struct talitos_edesc *edesc =
1610                  container_of(desc, struct talitos_edesc, desc);
1611         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1612
1613         if (!req_ctx->last && req_ctx->to_hash_later) {
1614                 /* Position any partial block for next update/final/finup */
1615                 memcpy(req_ctx->buf, req_ctx->bufnext, req_ctx->to_hash_later);
1616         }
1617         common_nonsnoop_hash_unmap(dev, edesc, areq);
1618
1619         kfree(edesc);
1620
1621         areq->base.complete(&areq->base, err);
1622 }
1623
1624 static int common_nonsnoop_hash(struct talitos_edesc *edesc,
1625                                 struct ahash_request *areq, unsigned int length,
1626                                 void (*callback) (struct device *dev,
1627                                                   struct talitos_desc *desc,
1628                                                   void *context, int error))
1629 {
1630         struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1631         struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1632         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1633         struct device *dev = ctx->dev;
1634         struct talitos_desc *desc = &edesc->desc;
1635         int sg_count, ret;
1636
1637         /* first DWORD empty */
1638         desc->ptr[0] = zero_entry;
1639
1640         /* hash context in */
1641         if (!req_ctx->first || req_ctx->swinit) {
1642                 map_single_talitos_ptr(dev, &desc->ptr[1],
1643                                        req_ctx->hw_context_size,
1644                                        (char *)req_ctx->hw_context, 0,
1645                                        DMA_TO_DEVICE);
1646                 req_ctx->swinit = 0;
1647         } else {
1648                 desc->ptr[1] = zero_entry;
1649                 /* Indicate next op is not the first. */
1650                 req_ctx->first = 0;
1651         }
1652
1653         /* HMAC key */
1654         if (ctx->keylen)
1655                 map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
1656                                        (char *)&ctx->key, 0, DMA_TO_DEVICE);
1657         else
1658                 desc->ptr[2] = zero_entry;
1659
1660         /*
1661          * data in
1662          */
1663         desc->ptr[3].len = cpu_to_be16(length);
1664         desc->ptr[3].j_extent = 0;
1665
1666         sg_count = talitos_map_sg(dev, req_ctx->psrc,
1667                                   edesc->src_nents ? : 1,
1668                                   DMA_TO_DEVICE,
1669                                   edesc->src_is_chained);
1670
1671         if (sg_count == 1) {
1672                 to_talitos_ptr(&desc->ptr[3], sg_dma_address(req_ctx->psrc));
1673         } else {
1674                 sg_count = sg_to_link_tbl(req_ctx->psrc, sg_count, length,
1675                                           &edesc->link_tbl[0]);
1676                 if (sg_count > 1) {
1677                         desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
1678                         to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
1679                         dma_sync_single_for_device(ctx->dev,
1680                                                    edesc->dma_link_tbl,
1681                                                    edesc->dma_len,
1682                                                    DMA_BIDIRECTIONAL);
1683                 } else {
1684                         /* Only one segment now, so no link tbl needed */
1685                         to_talitos_ptr(&desc->ptr[3],
1686                                        sg_dma_address(req_ctx->psrc));
1687                 }
1688         }
1689
1690         /* fifth DWORD empty */
1691         desc->ptr[4] = zero_entry;
1692
1693         /* hash/HMAC out -or- hash context out */
1694         if (req_ctx->last)
1695                 map_single_talitos_ptr(dev, &desc->ptr[5],
1696                                        crypto_ahash_digestsize(tfm),
1697                                        areq->result, 0, DMA_FROM_DEVICE);
1698         else
1699                 map_single_talitos_ptr(dev, &desc->ptr[5],
1700                                        req_ctx->hw_context_size,
1701                                        req_ctx->hw_context, 0, DMA_FROM_DEVICE);
1702
1703         /* last DWORD empty */
1704         desc->ptr[6] = zero_entry;
1705
1706         ret = talitos_submit(dev, desc, callback, areq);
1707         if (ret != -EINPROGRESS) {
1708                 common_nonsnoop_hash_unmap(dev, edesc, areq);
1709                 kfree(edesc);
1710         }
1711         return ret;
1712 }
1713
1714 static struct talitos_edesc *ahash_edesc_alloc(struct ahash_request *areq,
1715                                                unsigned int nbytes)
1716 {
1717         struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1718         struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1719         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1720
1721         return talitos_edesc_alloc(ctx->dev, req_ctx->psrc, NULL, 1,
1722                                    nbytes, 0, 0, areq->base.flags);
1723 }
1724
1725 static int ahash_init(struct ahash_request *areq)
1726 {
1727         struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1728         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1729
1730         /* Initialize the context */
1731         req_ctx->count = 0;
1732         req_ctx->first = 1; /* first indicates h/w must init its context */
1733         req_ctx->swinit = 0; /* assume h/w init of context */
1734         req_ctx->hw_context_size =
1735                 (crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE)
1736                         ? TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256
1737                         : TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512;
1738
1739         return 0;
1740 }
1741
1742 /*
1743  * on h/w without explicit sha224 support, we initialize h/w context
1744  * manually with sha224 constants, and tell it to run sha256.
1745  */
1746 static int ahash_init_sha224_swinit(struct ahash_request *areq)
1747 {
1748         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1749
1750         ahash_init(areq);
1751         req_ctx->swinit = 1;/* prevent h/w initting context with sha256 values*/
1752
1753         req_ctx->hw_context[0] = cpu_to_be32(SHA224_H0);
1754         req_ctx->hw_context[1] = cpu_to_be32(SHA224_H1);
1755         req_ctx->hw_context[2] = cpu_to_be32(SHA224_H2);
1756         req_ctx->hw_context[3] = cpu_to_be32(SHA224_H3);
1757         req_ctx->hw_context[4] = cpu_to_be32(SHA224_H4);
1758         req_ctx->hw_context[5] = cpu_to_be32(SHA224_H5);
1759         req_ctx->hw_context[6] = cpu_to_be32(SHA224_H6);
1760         req_ctx->hw_context[7] = cpu_to_be32(SHA224_H7);
1761
1762         /* init 64-bit count */
1763         req_ctx->hw_context[8] = 0;
1764         req_ctx->hw_context[9] = 0;
1765
1766         return 0;
1767 }
1768
1769 static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes)
1770 {
1771         struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1772         struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1773         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1774         struct talitos_edesc *edesc;
1775         unsigned int blocksize =
1776                         crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
1777         unsigned int nbytes_to_hash;
1778         unsigned int to_hash_later;
1779         unsigned int index;
1780         int chained;
1781
1782         index = req_ctx->count & (blocksize - 1);
1783         req_ctx->count += nbytes;
1784
1785         if (!req_ctx->last && (index + nbytes) < blocksize) {
1786                 /* Buffer the partial block */
1787                 sg_copy_to_buffer(areq->src,
1788                                   sg_count(areq->src, nbytes, &chained),
1789                                   req_ctx->buf + index, nbytes);
1790                 return 0;
1791         }
1792
1793         if (index) {
1794                 /* partial block from previous update; chain it in. */
1795                 sg_init_table(req_ctx->bufsl, (nbytes) ? 2 : 1);
1796                 sg_set_buf(req_ctx->bufsl, req_ctx->buf, index);
1797                 if (nbytes)
1798                         scatterwalk_sg_chain(req_ctx->bufsl, 2,
1799                                              areq->src);
1800                 req_ctx->psrc = req_ctx->bufsl;
1801         } else {
1802                 req_ctx->psrc = areq->src;
1803         }
1804         nbytes_to_hash =  index + nbytes;
1805         if (!req_ctx->last) {
1806                 to_hash_later = (nbytes_to_hash & (blocksize - 1));
1807                 if (to_hash_later) {
1808                         int nents;
1809                         /* Must copy to_hash_later bytes from the end
1810                          * to bufnext (a partial block) for later.
1811                          */
1812                         nents = sg_count(areq->src, nbytes, &chained);
1813                         sg_copy_end_to_buffer(areq->src, nents,
1814                                               req_ctx->bufnext,
1815                                               to_hash_later,
1816                                               nbytes - to_hash_later);
1817
1818                         /* Adjust count for what will be hashed now */
1819                         nbytes_to_hash -= to_hash_later;
1820                 }
1821                 req_ctx->to_hash_later = to_hash_later;
1822         }
1823
1824         /* allocate extended descriptor */
1825         edesc = ahash_edesc_alloc(areq, nbytes_to_hash);
1826         if (IS_ERR(edesc))
1827                 return PTR_ERR(edesc);
1828
1829         edesc->desc.hdr = ctx->desc_hdr_template;
1830
1831         /* On last one, request SEC to pad; otherwise continue */
1832         if (req_ctx->last)
1833                 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_PAD;
1834         else
1835                 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_CONT;
1836
1837         /* request SEC to INIT hash. */
1838         if (req_ctx->first && !req_ctx->swinit)
1839                 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_INIT;
1840
1841         /* When the tfm context has a keylen, it's an HMAC.
1842          * A first or last (ie. not middle) descriptor must request HMAC.
1843          */
1844         if (ctx->keylen && (req_ctx->first || req_ctx->last))
1845                 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_HMAC;
1846
1847         return common_nonsnoop_hash(edesc, areq, nbytes_to_hash,
1848                                     ahash_done);
1849 }
1850
1851 static int ahash_update(struct ahash_request *areq)
1852 {
1853         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1854
1855         req_ctx->last = 0;
1856
1857         return ahash_process_req(areq, areq->nbytes);
1858 }
1859
1860 static int ahash_final(struct ahash_request *areq)
1861 {
1862         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1863
1864         req_ctx->last = 1;
1865
1866         return ahash_process_req(areq, 0);
1867 }
1868
1869 static int ahash_finup(struct ahash_request *areq)
1870 {
1871         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1872
1873         req_ctx->last = 1;
1874
1875         return ahash_process_req(areq, areq->nbytes);
1876 }
1877
1878 static int ahash_digest(struct ahash_request *areq)
1879 {
1880         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1881         struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
1882
1883         ahash->init(areq);
1884         req_ctx->last = 1;
1885
1886         return ahash_process_req(areq, areq->nbytes);
1887 }
1888
1889 struct talitos_alg_template {
1890         u32 type;
1891         union {
1892                 struct crypto_alg crypto;
1893                 struct ahash_alg hash;
1894         } alg;
1895         __be32 desc_hdr_template;
1896 };
1897
1898 static struct talitos_alg_template driver_algs[] = {
1899         /* AEAD algorithms.  These use a single-pass ipsec_esp descriptor */
1900         {       .type = CRYPTO_ALG_TYPE_AEAD,
1901                 .alg.crypto = {
1902                         .cra_name = "authenc(hmac(sha1),cbc(aes))",
1903                         .cra_driver_name = "authenc-hmac-sha1-cbc-aes-talitos",
1904                         .cra_blocksize = AES_BLOCK_SIZE,
1905                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1906                         .cra_type = &crypto_aead_type,
1907                         .cra_aead = {
1908                                 .setkey = aead_setkey,
1909                                 .setauthsize = aead_setauthsize,
1910                                 .encrypt = aead_encrypt,
1911                                 .decrypt = aead_decrypt,
1912                                 .givencrypt = aead_givencrypt,
1913                                 .geniv = "<built-in>",
1914                                 .ivsize = AES_BLOCK_SIZE,
1915                                 .maxauthsize = SHA1_DIGEST_SIZE,
1916                         }
1917                 },
1918                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1919                                      DESC_HDR_SEL0_AESU |
1920                                      DESC_HDR_MODE0_AESU_CBC |
1921                                      DESC_HDR_SEL1_MDEUA |
1922                                      DESC_HDR_MODE1_MDEU_INIT |
1923                                      DESC_HDR_MODE1_MDEU_PAD |
1924                                      DESC_HDR_MODE1_MDEU_SHA1_HMAC,
1925         },
1926         {       .type = CRYPTO_ALG_TYPE_AEAD,
1927                 .alg.crypto = {
1928                         .cra_name = "authenc(hmac(sha1),cbc(des3_ede))",
1929                         .cra_driver_name = "authenc-hmac-sha1-cbc-3des-talitos",
1930                         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1931                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1932                         .cra_type = &crypto_aead_type,
1933                         .cra_aead = {
1934                                 .setkey = aead_setkey,
1935                                 .setauthsize = aead_setauthsize,
1936                                 .encrypt = aead_encrypt,
1937                                 .decrypt = aead_decrypt,
1938                                 .givencrypt = aead_givencrypt,
1939                                 .geniv = "<built-in>",
1940                                 .ivsize = DES3_EDE_BLOCK_SIZE,
1941                                 .maxauthsize = SHA1_DIGEST_SIZE,
1942                         }
1943                 },
1944                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1945                                      DESC_HDR_SEL0_DEU |
1946                                      DESC_HDR_MODE0_DEU_CBC |
1947                                      DESC_HDR_MODE0_DEU_3DES |
1948                                      DESC_HDR_SEL1_MDEUA |
1949                                      DESC_HDR_MODE1_MDEU_INIT |
1950                                      DESC_HDR_MODE1_MDEU_PAD |
1951                                      DESC_HDR_MODE1_MDEU_SHA1_HMAC,
1952         },
1953         {       .type = CRYPTO_ALG_TYPE_AEAD,
1954                 .alg.crypto = {
1955                         .cra_name = "authenc(hmac(sha256),cbc(aes))",
1956                         .cra_driver_name = "authenc-hmac-sha256-cbc-aes-talitos",
1957                         .cra_blocksize = AES_BLOCK_SIZE,
1958                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1959                         .cra_type = &crypto_aead_type,
1960                         .cra_aead = {
1961                                 .setkey = aead_setkey,
1962                                 .setauthsize = aead_setauthsize,
1963                                 .encrypt = aead_encrypt,
1964                                 .decrypt = aead_decrypt,
1965                                 .givencrypt = aead_givencrypt,
1966                                 .geniv = "<built-in>",
1967                                 .ivsize = AES_BLOCK_SIZE,
1968                                 .maxauthsize = SHA256_DIGEST_SIZE,
1969                         }
1970                 },
1971                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1972                                      DESC_HDR_SEL0_AESU |
1973                                      DESC_HDR_MODE0_AESU_CBC |
1974                                      DESC_HDR_SEL1_MDEUA |
1975                                      DESC_HDR_MODE1_MDEU_INIT |
1976                                      DESC_HDR_MODE1_MDEU_PAD |
1977                                      DESC_HDR_MODE1_MDEU_SHA256_HMAC,
1978         },
1979         {       .type = CRYPTO_ALG_TYPE_AEAD,
1980                 .alg.crypto = {
1981                         .cra_name = "authenc(hmac(sha256),cbc(des3_ede))",
1982                         .cra_driver_name = "authenc-hmac-sha256-cbc-3des-talitos",
1983                         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1984                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1985                         .cra_type = &crypto_aead_type,
1986                         .cra_aead = {
1987                                 .setkey = aead_setkey,
1988                                 .setauthsize = aead_setauthsize,
1989                                 .encrypt = aead_encrypt,
1990                                 .decrypt = aead_decrypt,
1991                                 .givencrypt = aead_givencrypt,
1992                                 .geniv = "<built-in>",
1993                                 .ivsize = DES3_EDE_BLOCK_SIZE,
1994                                 .maxauthsize = SHA256_DIGEST_SIZE,
1995                         }
1996                 },
1997                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1998                                      DESC_HDR_SEL0_DEU |
1999                                      DESC_HDR_MODE0_DEU_CBC |
2000                                      DESC_HDR_MODE0_DEU_3DES |
2001                                      DESC_HDR_SEL1_MDEUA |
2002                                      DESC_HDR_MODE1_MDEU_INIT |
2003                                      DESC_HDR_MODE1_MDEU_PAD |
2004                                      DESC_HDR_MODE1_MDEU_SHA256_HMAC,
2005         },
2006         {       .type = CRYPTO_ALG_TYPE_AEAD,
2007                 .alg.crypto = {
2008                         .cra_name = "authenc(hmac(md5),cbc(aes))",
2009                         .cra_driver_name = "authenc-hmac-md5-cbc-aes-talitos",
2010                         .cra_blocksize = AES_BLOCK_SIZE,
2011                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2012                         .cra_type = &crypto_aead_type,
2013                         .cra_aead = {
2014                                 .setkey = aead_setkey,
2015                                 .setauthsize = aead_setauthsize,
2016                                 .encrypt = aead_encrypt,
2017                                 .decrypt = aead_decrypt,
2018                                 .givencrypt = aead_givencrypt,
2019                                 .geniv = "<built-in>",
2020                                 .ivsize = AES_BLOCK_SIZE,
2021                                 .maxauthsize = MD5_DIGEST_SIZE,
2022                         }
2023                 },
2024                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2025                                      DESC_HDR_SEL0_AESU |
2026                                      DESC_HDR_MODE0_AESU_CBC |
2027                                      DESC_HDR_SEL1_MDEUA |
2028                                      DESC_HDR_MODE1_MDEU_INIT |
2029                                      DESC_HDR_MODE1_MDEU_PAD |
2030                                      DESC_HDR_MODE1_MDEU_MD5_HMAC,
2031         },
2032         {       .type = CRYPTO_ALG_TYPE_AEAD,
2033                 .alg.crypto = {
2034                         .cra_name = "authenc(hmac(md5),cbc(des3_ede))",
2035                         .cra_driver_name = "authenc-hmac-md5-cbc-3des-talitos",
2036                         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2037                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2038                         .cra_type = &crypto_aead_type,
2039                         .cra_aead = {
2040                                 .setkey = aead_setkey,
2041                                 .setauthsize = aead_setauthsize,
2042                                 .encrypt = aead_encrypt,
2043                                 .decrypt = aead_decrypt,
2044                                 .givencrypt = aead_givencrypt,
2045                                 .geniv = "<built-in>",
2046                                 .ivsize = DES3_EDE_BLOCK_SIZE,
2047                                 .maxauthsize = MD5_DIGEST_SIZE,
2048                         }
2049                 },
2050                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2051                                      DESC_HDR_SEL0_DEU |
2052                                      DESC_HDR_MODE0_DEU_CBC |
2053                                      DESC_HDR_MODE0_DEU_3DES |
2054                                      DESC_HDR_SEL1_MDEUA |
2055                                      DESC_HDR_MODE1_MDEU_INIT |
2056                                      DESC_HDR_MODE1_MDEU_PAD |
2057                                      DESC_HDR_MODE1_MDEU_MD5_HMAC,
2058         },
2059         /* ABLKCIPHER algorithms. */
2060         {       .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
2061                 .alg.crypto = {
2062                         .cra_name = "cbc(aes)",
2063                         .cra_driver_name = "cbc-aes-talitos",
2064                         .cra_blocksize = AES_BLOCK_SIZE,
2065                         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2066                                      CRYPTO_ALG_ASYNC,
2067                         .cra_type = &crypto_ablkcipher_type,
2068                         .cra_ablkcipher = {
2069                                 .setkey = ablkcipher_setkey,
2070                                 .encrypt = ablkcipher_encrypt,
2071                                 .decrypt = ablkcipher_decrypt,
2072                                 .geniv = "eseqiv",
2073                                 .min_keysize = AES_MIN_KEY_SIZE,
2074                                 .max_keysize = AES_MAX_KEY_SIZE,
2075                                 .ivsize = AES_BLOCK_SIZE,
2076                         }
2077                 },
2078                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2079                                      DESC_HDR_SEL0_AESU |
2080                                      DESC_HDR_MODE0_AESU_CBC,
2081         },
2082         {       .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
2083                 .alg.crypto = {
2084                         .cra_name = "cbc(des3_ede)",
2085                         .cra_driver_name = "cbc-3des-talitos",
2086                         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2087                         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2088                                      CRYPTO_ALG_ASYNC,
2089                         .cra_type = &crypto_ablkcipher_type,
2090                         .cra_ablkcipher = {
2091                                 .setkey = ablkcipher_setkey,
2092                                 .encrypt = ablkcipher_encrypt,
2093                                 .decrypt = ablkcipher_decrypt,
2094                                 .geniv = "eseqiv",
2095                                 .min_keysize = DES3_EDE_KEY_SIZE,
2096                                 .max_keysize = DES3_EDE_KEY_SIZE,
2097                                 .ivsize = DES3_EDE_BLOCK_SIZE,
2098                         }
2099                 },
2100                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2101                                      DESC_HDR_SEL0_DEU |
2102                                      DESC_HDR_MODE0_DEU_CBC |
2103                                      DESC_HDR_MODE0_DEU_3DES,
2104         },
2105         /* AHASH algorithms. */
2106         {       .type = CRYPTO_ALG_TYPE_AHASH,
2107                 .alg.hash = {
2108                         .init = ahash_init,
2109                         .update = ahash_update,
2110                         .final = ahash_final,
2111                         .finup = ahash_finup,
2112                         .digest = ahash_digest,
2113                         .halg.digestsize = MD5_DIGEST_SIZE,
2114                         .halg.base = {
2115                                 .cra_name = "md5",
2116                                 .cra_driver_name = "md5-talitos",
2117                                 .cra_blocksize = MD5_BLOCK_SIZE,
2118                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2119                                              CRYPTO_ALG_ASYNC,
2120                                 .cra_type = &crypto_ahash_type
2121                         }
2122                 },
2123                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2124                                      DESC_HDR_SEL0_MDEUA |
2125                                      DESC_HDR_MODE0_MDEU_MD5,
2126         },
2127         {       .type = CRYPTO_ALG_TYPE_AHASH,
2128                 .alg.hash = {
2129                         .init = ahash_init,
2130                         .update = ahash_update,
2131                         .final = ahash_final,
2132                         .finup = ahash_finup,
2133                         .digest = ahash_digest,
2134                         .halg.digestsize = SHA1_DIGEST_SIZE,
2135                         .halg.base = {
2136                                 .cra_name = "sha1",
2137                                 .cra_driver_name = "sha1-talitos",
2138                                 .cra_blocksize = SHA1_BLOCK_SIZE,
2139                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2140                                              CRYPTO_ALG_ASYNC,
2141                                 .cra_type = &crypto_ahash_type
2142                         }
2143                 },
2144                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2145                                      DESC_HDR_SEL0_MDEUA |
2146                                      DESC_HDR_MODE0_MDEU_SHA1,
2147         },
2148         {       .type = CRYPTO_ALG_TYPE_AHASH,
2149                 .alg.hash = {
2150                         .init = ahash_init,
2151                         .update = ahash_update,
2152                         .final = ahash_final,
2153                         .finup = ahash_finup,
2154                         .digest = ahash_digest,
2155                         .halg.digestsize = SHA224_DIGEST_SIZE,
2156                         .halg.base = {
2157                                 .cra_name = "sha224",
2158                                 .cra_driver_name = "sha224-talitos",
2159                                 .cra_blocksize = SHA224_BLOCK_SIZE,
2160                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2161                                              CRYPTO_ALG_ASYNC,
2162                                 .cra_type = &crypto_ahash_type
2163                         }
2164                 },
2165                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2166                                      DESC_HDR_SEL0_MDEUA |
2167                                      DESC_HDR_MODE0_MDEU_SHA224,
2168         },
2169         {       .type = CRYPTO_ALG_TYPE_AHASH,
2170                 .alg.hash = {
2171                         .init = ahash_init,
2172                         .update = ahash_update,
2173                         .final = ahash_final,
2174                         .finup = ahash_finup,
2175                         .digest = ahash_digest,
2176                         .halg.digestsize = SHA256_DIGEST_SIZE,
2177                         .halg.base = {
2178                                 .cra_name = "sha256",
2179                                 .cra_driver_name = "sha256-talitos",
2180                                 .cra_blocksize = SHA256_BLOCK_SIZE,
2181                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2182                                              CRYPTO_ALG_ASYNC,
2183                                 .cra_type = &crypto_ahash_type
2184                         }
2185                 },
2186                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2187                                      DESC_HDR_SEL0_MDEUA |
2188                                      DESC_HDR_MODE0_MDEU_SHA256,
2189         },
2190         {       .type = CRYPTO_ALG_TYPE_AHASH,
2191                 .alg.hash = {
2192                         .init = ahash_init,
2193                         .update = ahash_update,
2194                         .final = ahash_final,
2195                         .finup = ahash_finup,
2196                         .digest = ahash_digest,
2197                         .halg.digestsize = SHA384_DIGEST_SIZE,
2198                         .halg.base = {
2199                                 .cra_name = "sha384",
2200                                 .cra_driver_name = "sha384-talitos",
2201                                 .cra_blocksize = SHA384_BLOCK_SIZE,
2202                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2203                                              CRYPTO_ALG_ASYNC,
2204                                 .cra_type = &crypto_ahash_type
2205                         }
2206                 },
2207                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2208                                      DESC_HDR_SEL0_MDEUB |
2209                                      DESC_HDR_MODE0_MDEUB_SHA384,
2210         },
2211         {       .type = CRYPTO_ALG_TYPE_AHASH,
2212                 .alg.hash = {
2213                         .init = ahash_init,
2214                         .update = ahash_update,
2215                         .final = ahash_final,
2216                         .finup = ahash_finup,
2217                         .digest = ahash_digest,
2218                         .halg.digestsize = SHA512_DIGEST_SIZE,
2219                         .halg.base = {
2220                                 .cra_name = "sha512",
2221                                 .cra_driver_name = "sha512-talitos",
2222                                 .cra_blocksize = SHA512_BLOCK_SIZE,
2223                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2224                                              CRYPTO_ALG_ASYNC,
2225                                 .cra_type = &crypto_ahash_type
2226                         }
2227                 },
2228                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2229                                      DESC_HDR_SEL0_MDEUB |
2230                                      DESC_HDR_MODE0_MDEUB_SHA512,
2231         },
2232 };
2233
2234 struct talitos_crypto_alg {
2235         struct list_head entry;
2236         struct device *dev;
2237         struct talitos_alg_template algt;
2238 };
2239
2240 static int talitos_cra_init(struct crypto_tfm *tfm)
2241 {
2242         struct crypto_alg *alg = tfm->__crt_alg;
2243         struct talitos_crypto_alg *talitos_alg;
2244         struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2245
2246         if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_AHASH)
2247                 talitos_alg = container_of(__crypto_ahash_alg(alg),
2248                                            struct talitos_crypto_alg,
2249                                            algt.alg.hash);
2250         else
2251                 talitos_alg = container_of(alg, struct talitos_crypto_alg,
2252                                            algt.alg.crypto);
2253
2254         /* update context with ptr to dev */
2255         ctx->dev = talitos_alg->dev;
2256
2257         /* copy descriptor header template value */
2258         ctx->desc_hdr_template = talitos_alg->algt.desc_hdr_template;
2259
2260         return 0;
2261 }
2262
2263 static int talitos_cra_init_aead(struct crypto_tfm *tfm)
2264 {
2265         struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2266
2267         talitos_cra_init(tfm);
2268
2269         /* random first IV */
2270         get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH);
2271
2272         return 0;
2273 }
2274
2275 static int talitos_cra_init_ahash(struct crypto_tfm *tfm)
2276 {
2277         struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2278
2279         talitos_cra_init(tfm);
2280
2281         ctx->keylen = 0;
2282         crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
2283                                  sizeof(struct talitos_ahash_req_ctx));
2284
2285         return 0;
2286 }
2287
2288 /*
2289  * given the alg's descriptor header template, determine whether descriptor
2290  * type and primary/secondary execution units required match the hw
2291  * capabilities description provided in the device tree node.
2292  */
2293 static int hw_supports(struct device *dev, __be32 desc_hdr_template)
2294 {
2295         struct talitos_private *priv = dev_get_drvdata(dev);
2296         int ret;
2297
2298         ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) &&
2299               (1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units);
2300
2301         if (SECONDARY_EU(desc_hdr_template))
2302                 ret = ret && (1 << SECONDARY_EU(desc_hdr_template)
2303                               & priv->exec_units);
2304
2305         return ret;
2306 }
2307
2308 static int talitos_remove(struct of_device *ofdev)
2309 {
2310         struct device *dev = &ofdev->dev;
2311         struct talitos_private *priv = dev_get_drvdata(dev);
2312         struct talitos_crypto_alg *t_alg, *n;
2313         int i;
2314
2315         list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) {
2316                 switch (t_alg->algt.type) {
2317                 case CRYPTO_ALG_TYPE_ABLKCIPHER:
2318                 case CRYPTO_ALG_TYPE_AEAD:
2319                         crypto_unregister_alg(&t_alg->algt.alg.crypto);
2320                         break;
2321                 case CRYPTO_ALG_TYPE_AHASH:
2322                         crypto_unregister_ahash(&t_alg->algt.alg.hash);
2323                         break;
2324                 }
2325                 list_del(&t_alg->entry);
2326                 kfree(t_alg);
2327         }
2328
2329         if (hw_supports(dev, DESC_HDR_SEL0_RNG))
2330                 talitos_unregister_rng(dev);
2331
2332         for (i = 0; i < priv->num_channels; i++)
2333                 if (priv->chan[i].fifo)
2334                         kfree(priv->chan[i].fifo);
2335
2336         kfree(priv->chan);
2337
2338         if (priv->irq != NO_IRQ) {
2339                 free_irq(priv->irq, dev);
2340                 irq_dispose_mapping(priv->irq);
2341         }
2342
2343         tasklet_kill(&priv->done_task);
2344
2345         iounmap(priv->reg);
2346
2347         dev_set_drvdata(dev, NULL);
2348
2349         kfree(priv);
2350
2351         return 0;
2352 }
2353
2354 static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
2355                                                     struct talitos_alg_template
2356                                                            *template)
2357 {
2358         struct talitos_private *priv = dev_get_drvdata(dev);
2359         struct talitos_crypto_alg *t_alg;
2360         struct crypto_alg *alg;
2361
2362         t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL);
2363         if (!t_alg)
2364                 return ERR_PTR(-ENOMEM);
2365
2366         t_alg->algt = *template;
2367
2368         switch (t_alg->algt.type) {
2369         case CRYPTO_ALG_TYPE_ABLKCIPHER:
2370                 alg = &t_alg->algt.alg.crypto;
2371                 alg->cra_init = talitos_cra_init;
2372                 break;
2373         case CRYPTO_ALG_TYPE_AEAD:
2374                 alg = &t_alg->algt.alg.crypto;
2375                 alg->cra_init = talitos_cra_init_aead;
2376                 break;
2377         case CRYPTO_ALG_TYPE_AHASH:
2378                 alg = &t_alg->algt.alg.hash.halg.base;
2379                 alg->cra_init = talitos_cra_init_ahash;
2380                 if (!(priv->features & TALITOS_FTR_SHA224_HWINIT) &&
2381                     !strcmp(alg->cra_name, "sha224")) {
2382                         t_alg->algt.alg.hash.init = ahash_init_sha224_swinit;
2383                         t_alg->algt.desc_hdr_template =
2384                                         DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2385                                         DESC_HDR_SEL0_MDEUA |
2386                                         DESC_HDR_MODE0_MDEU_SHA256;
2387                 }
2388                 break;
2389         }
2390
2391         alg->cra_module = THIS_MODULE;
2392         alg->cra_priority = TALITOS_CRA_PRIORITY;
2393         alg->cra_alignmask = 0;
2394         alg->cra_ctxsize = sizeof(struct talitos_ctx);
2395
2396         t_alg->dev = dev;
2397
2398         return t_alg;
2399 }
2400
2401 static int talitos_probe(struct of_device *ofdev,
2402                          const struct of_device_id *match)
2403 {
2404         struct device *dev = &ofdev->dev;
2405         struct device_node *np = ofdev->dev.of_node;
2406         struct talitos_private *priv;
2407         const unsigned int *prop;
2408         int i, err;
2409
2410         priv = kzalloc(sizeof(struct talitos_private), GFP_KERNEL);
2411         if (!priv)
2412                 return -ENOMEM;
2413
2414         dev_set_drvdata(dev, priv);
2415
2416         priv->ofdev = ofdev;
2417
2418         tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev);
2419
2420         INIT_LIST_HEAD(&priv->alg_list);
2421
2422         priv->irq = irq_of_parse_and_map(np, 0);
2423
2424         if (priv->irq == NO_IRQ) {
2425                 dev_err(dev, "failed to map irq\n");
2426                 err = -EINVAL;
2427                 goto err_out;
2428         }
2429
2430         /* get the irq line */
2431         err = request_irq(priv->irq, talitos_interrupt, 0,
2432                           dev_driver_string(dev), dev);
2433         if (err) {
2434                 dev_err(dev, "failed to request irq %d\n", priv->irq);
2435                 irq_dispose_mapping(priv->irq);
2436                 priv->irq = NO_IRQ;
2437                 goto err_out;
2438         }
2439
2440         priv->reg = of_iomap(np, 0);
2441         if (!priv->reg) {
2442                 dev_err(dev, "failed to of_iomap\n");
2443                 err = -ENOMEM;
2444                 goto err_out;
2445         }
2446
2447         /* get SEC version capabilities from device tree */
2448         prop = of_get_property(np, "fsl,num-channels", NULL);
2449         if (prop)
2450                 priv->num_channels = *prop;
2451
2452         prop = of_get_property(np, "fsl,channel-fifo-len", NULL);
2453         if (prop)
2454                 priv->chfifo_len = *prop;
2455
2456         prop = of_get_property(np, "fsl,exec-units-mask", NULL);
2457         if (prop)
2458                 priv->exec_units = *prop;
2459
2460         prop = of_get_property(np, "fsl,descriptor-types-mask", NULL);
2461         if (prop)
2462                 priv->desc_types = *prop;
2463
2464         if (!is_power_of_2(priv->num_channels) || !priv->chfifo_len ||
2465             !priv->exec_units || !priv->desc_types) {
2466                 dev_err(dev, "invalid property data in device tree node\n");
2467                 err = -EINVAL;
2468                 goto err_out;
2469         }
2470
2471         if (of_device_is_compatible(np, "fsl,sec3.0"))
2472                 priv->features |= TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT;
2473
2474         if (of_device_is_compatible(np, "fsl,sec2.1"))
2475                 priv->features |= TALITOS_FTR_HW_AUTH_CHECK |
2476                                   TALITOS_FTR_SHA224_HWINIT;
2477
2478         priv->chan = kzalloc(sizeof(struct talitos_channel) *
2479                              priv->num_channels, GFP_KERNEL);
2480         if (!priv->chan) {
2481                 dev_err(dev, "failed to allocate channel management space\n");
2482                 err = -ENOMEM;
2483                 goto err_out;
2484         }
2485
2486         for (i = 0; i < priv->num_channels; i++) {
2487                 spin_lock_init(&priv->chan[i].head_lock);
2488                 spin_lock_init(&priv->chan[i].tail_lock);
2489         }
2490
2491         priv->fifo_len = roundup_pow_of_two(priv->chfifo_len);
2492
2493         for (i = 0; i < priv->num_channels; i++) {
2494                 priv->chan[i].fifo = kzalloc(sizeof(struct talitos_request) *
2495                                              priv->fifo_len, GFP_KERNEL);
2496                 if (!priv->chan[i].fifo) {
2497                         dev_err(dev, "failed to allocate request fifo %d\n", i);
2498                         err = -ENOMEM;
2499                         goto err_out;
2500                 }
2501         }
2502
2503         for (i = 0; i < priv->num_channels; i++)
2504                 atomic_set(&priv->chan[i].submit_count,
2505                            -(priv->chfifo_len - 1));
2506
2507         dma_set_mask(dev, DMA_BIT_MASK(36));
2508
2509         /* reset and initialize the h/w */
2510         err = init_device(dev);
2511         if (err) {
2512                 dev_err(dev, "failed to initialize device\n");
2513                 goto err_out;
2514         }
2515
2516         /* register the RNG, if available */
2517         if (hw_supports(dev, DESC_HDR_SEL0_RNG)) {
2518                 err = talitos_register_rng(dev);
2519                 if (err) {
2520                         dev_err(dev, "failed to register hwrng: %d\n", err);
2521                         goto err_out;
2522                 } else
2523                         dev_info(dev, "hwrng\n");
2524         }
2525
2526         /* register crypto algorithms the device supports */
2527         for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
2528                 if (hw_supports(dev, driver_algs[i].desc_hdr_template)) {
2529                         struct talitos_crypto_alg *t_alg;
2530                         char *name = NULL;
2531
2532                         t_alg = talitos_alg_alloc(dev, &driver_algs[i]);
2533                         if (IS_ERR(t_alg)) {
2534                                 err = PTR_ERR(t_alg);
2535                                 goto err_out;
2536                         }
2537
2538                         switch (t_alg->algt.type) {
2539                         case CRYPTO_ALG_TYPE_ABLKCIPHER:
2540                         case CRYPTO_ALG_TYPE_AEAD:
2541                                 err = crypto_register_alg(
2542                                                 &t_alg->algt.alg.crypto);
2543                                 name = t_alg->algt.alg.crypto.cra_driver_name;
2544                                 break;
2545                         case CRYPTO_ALG_TYPE_AHASH:
2546                                 err = crypto_register_ahash(
2547                                                 &t_alg->algt.alg.hash);
2548                                 name =
2549                                  t_alg->algt.alg.hash.halg.base.cra_driver_name;
2550                                 break;
2551                         }
2552                         if (err) {
2553                                 dev_err(dev, "%s alg registration failed\n",
2554                                         name);
2555                                 kfree(t_alg);
2556                         } else {
2557                                 list_add_tail(&t_alg->entry, &priv->alg_list);
2558                                 dev_info(dev, "%s\n", name);
2559                         }
2560                 }
2561         }
2562
2563         return 0;
2564
2565 err_out:
2566         talitos_remove(ofdev);
2567
2568         return err;
2569 }
2570
2571 static const struct of_device_id talitos_match[] = {
2572         {
2573                 .compatible = "fsl,sec2.0",
2574         },
2575         {},
2576 };
2577 MODULE_DEVICE_TABLE(of, talitos_match);
2578
2579 static struct of_platform_driver talitos_driver = {
2580         .driver = {
2581                 .name = "talitos",
2582                 .owner = THIS_MODULE,
2583                 .of_match_table = talitos_match,
2584         },
2585         .probe = talitos_probe,
2586         .remove = talitos_remove,
2587 };
2588
2589 static int __init talitos_init(void)
2590 {
2591         return of_register_platform_driver(&talitos_driver);
2592 }
2593 module_init(talitos_init);
2594
2595 static void __exit talitos_exit(void)
2596 {
2597         of_unregister_platform_driver(&talitos_driver);
2598 }
2599 module_exit(talitos_exit);
2600
2601 MODULE_LICENSE("GPL");
2602 MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>");
2603 MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver");