linux/drivers/crypto/talitos.c
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   1/*
   2 * talitos - Freescale Integrated Security Engine (SEC) device driver
   3 *
   4 * Copyright (c) 2008-2011 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#include <linux/string.h>
  42
  43#include <crypto/algapi.h>
  44#include <crypto/aes.h>
  45#include <crypto/des.h>
  46#include <crypto/sha.h>
  47#include <crypto/md5.h>
  48#include <crypto/aead.h>
  49#include <crypto/authenc.h>
  50#include <crypto/skcipher.h>
  51#include <crypto/hash.h>
  52#include <crypto/internal/hash.h>
  53#include <crypto/scatterwalk.h>
  54
  55#include "talitos.h"
  56
  57static void to_talitos_ptr(struct talitos_ptr *talitos_ptr, dma_addr_t dma_addr)
  58{
  59        talitos_ptr->ptr = cpu_to_be32(lower_32_bits(dma_addr));
  60        talitos_ptr->eptr = upper_32_bits(dma_addr);
  61}
  62
  63/*
  64 * map virtual single (contiguous) pointer to h/w descriptor pointer
  65 */
  66static void map_single_talitos_ptr(struct device *dev,
  67                                   struct talitos_ptr *talitos_ptr,
  68                                   unsigned short len, void *data,
  69                                   unsigned char extent,
  70                                   enum dma_data_direction dir)
  71{
  72        dma_addr_t dma_addr = dma_map_single(dev, data, len, dir);
  73
  74        talitos_ptr->len = cpu_to_be16(len);
  75        to_talitos_ptr(talitos_ptr, dma_addr);
  76        talitos_ptr->j_extent = extent;
  77}
  78
  79/*
  80 * unmap bus single (contiguous) h/w descriptor pointer
  81 */
  82static void unmap_single_talitos_ptr(struct device *dev,
  83                                     struct talitos_ptr *talitos_ptr,
  84                                     enum dma_data_direction dir)
  85{
  86        dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr),
  87                         be16_to_cpu(talitos_ptr->len), dir);
  88}
  89
  90static int reset_channel(struct device *dev, int ch)
  91{
  92        struct talitos_private *priv = dev_get_drvdata(dev);
  93        unsigned int timeout = TALITOS_TIMEOUT;
  94
  95        setbits32(priv->chan[ch].reg + TALITOS_CCCR, TALITOS_CCCR_RESET);
  96
  97        while ((in_be32(priv->chan[ch].reg + TALITOS_CCCR) & TALITOS_CCCR_RESET)
  98               && --timeout)
  99                cpu_relax();
 100
 101        if (timeout == 0) {
 102                dev_err(dev, "failed to reset channel %d\n", ch);
 103                return -EIO;
 104        }
 105
 106        /* set 36-bit addressing, done writeback enable and done IRQ enable */
 107        setbits32(priv->chan[ch].reg + TALITOS_CCCR_LO, TALITOS_CCCR_LO_EAE |
 108                  TALITOS_CCCR_LO_CDWE | TALITOS_CCCR_LO_CDIE);
 109
 110        /* and ICCR writeback, if available */
 111        if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
 112                setbits32(priv->chan[ch].reg + TALITOS_CCCR_LO,
 113                          TALITOS_CCCR_LO_IWSE);
 114
 115        return 0;
 116}
 117
 118static int reset_device(struct device *dev)
 119{
 120        struct talitos_private *priv = dev_get_drvdata(dev);
 121        unsigned int timeout = TALITOS_TIMEOUT;
 122        u32 mcr = TALITOS_MCR_SWR;
 123
 124        setbits32(priv->reg + TALITOS_MCR, mcr);
 125
 126        while ((in_be32(priv->reg + TALITOS_MCR) & TALITOS_MCR_SWR)
 127               && --timeout)
 128                cpu_relax();
 129
 130        if (priv->irq[1]) {
 131                mcr = TALITOS_MCR_RCA1 | TALITOS_MCR_RCA3;
 132                setbits32(priv->reg + TALITOS_MCR, mcr);
 133        }
 134
 135        if (timeout == 0) {
 136                dev_err(dev, "failed to reset device\n");
 137                return -EIO;
 138        }
 139
 140        return 0;
 141}
 142
 143/*
 144 * Reset and initialize the device
 145 */
 146static int init_device(struct device *dev)
 147{
 148        struct talitos_private *priv = dev_get_drvdata(dev);
 149        int ch, err;
 150
 151        /*
 152         * Master reset
 153         * errata documentation: warning: certain SEC interrupts
 154         * are not fully cleared by writing the MCR:SWR bit,
 155         * set bit twice to completely reset
 156         */
 157        err = reset_device(dev);
 158        if (err)
 159                return err;
 160
 161        err = reset_device(dev);
 162        if (err)
 163                return err;
 164
 165        /* reset channels */
 166        for (ch = 0; ch < priv->num_channels; ch++) {
 167                err = reset_channel(dev, ch);
 168                if (err)
 169                        return err;
 170        }
 171
 172        /* enable channel done and error interrupts */
 173        setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT);
 174        setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT);
 175
 176        /* disable integrity check error interrupts (use writeback instead) */
 177        if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
 178                setbits32(priv->reg + TALITOS_MDEUICR_LO,
 179                          TALITOS_MDEUICR_LO_ICE);
 180
 181        return 0;
 182}
 183
 184/**
 185 * talitos_submit - submits a descriptor to the device for processing
 186 * @dev:        the SEC device to be used
 187 * @ch:         the SEC device channel to be used
 188 * @desc:       the descriptor to be processed by the device
 189 * @callback:   whom to call when processing is complete
 190 * @context:    a handle for use by caller (optional)
 191 *
 192 * desc must contain valid dma-mapped (bus physical) address pointers.
 193 * callback must check err and feedback in descriptor header
 194 * for device processing status.
 195 */
 196int talitos_submit(struct device *dev, int ch, struct talitos_desc *desc,
 197                   void (*callback)(struct device *dev,
 198                                    struct talitos_desc *desc,
 199                                    void *context, int error),
 200                   void *context)
 201{
 202        struct talitos_private *priv = dev_get_drvdata(dev);
 203        struct talitos_request *request;
 204        unsigned long flags;
 205        int head;
 206
 207        spin_lock_irqsave(&priv->chan[ch].head_lock, flags);
 208
 209        if (!atomic_inc_not_zero(&priv->chan[ch].submit_count)) {
 210                /* h/w fifo is full */
 211                spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags);
 212                return -EAGAIN;
 213        }
 214
 215        head = priv->chan[ch].head;
 216        request = &priv->chan[ch].fifo[head];
 217
 218        /* map descriptor and save caller data */
 219        request->dma_desc = dma_map_single(dev, desc, sizeof(*desc),
 220                                           DMA_BIDIRECTIONAL);
 221        request->callback = callback;
 222        request->context = context;
 223
 224        /* increment fifo head */
 225        priv->chan[ch].head = (priv->chan[ch].head + 1) & (priv->fifo_len - 1);
 226
 227        smp_wmb();
 228        request->desc = desc;
 229
 230        /* GO! */
 231        wmb();
 232        out_be32(priv->chan[ch].reg + TALITOS_FF,
 233                 upper_32_bits(request->dma_desc));
 234        out_be32(priv->chan[ch].reg + TALITOS_FF_LO,
 235                 lower_32_bits(request->dma_desc));
 236
 237        spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags);
 238
 239        return -EINPROGRESS;
 240}
 241EXPORT_SYMBOL(talitos_submit);
 242
 243/*
 244 * process what was done, notify callback of error if not
 245 */
 246static void flush_channel(struct device *dev, int ch, int error, int reset_ch)
 247{
 248        struct talitos_private *priv = dev_get_drvdata(dev);
 249        struct talitos_request *request, saved_req;
 250        unsigned long flags;
 251        int tail, status;
 252
 253        spin_lock_irqsave(&priv->chan[ch].tail_lock, flags);
 254
 255        tail = priv->chan[ch].tail;
 256        while (priv->chan[ch].fifo[tail].desc) {
 257                request = &priv->chan[ch].fifo[tail];
 258
 259                /* descriptors with their done bits set don't get the error */
 260                rmb();
 261                if ((request->desc->hdr & DESC_HDR_DONE) == DESC_HDR_DONE)
 262                        status = 0;
 263                else
 264                        if (!error)
 265                                break;
 266                        else
 267                                status = error;
 268
 269                dma_unmap_single(dev, request->dma_desc,
 270                                 sizeof(struct talitos_desc),
 271                                 DMA_BIDIRECTIONAL);
 272
 273                /* copy entries so we can call callback outside lock */
 274                saved_req.desc = request->desc;
 275                saved_req.callback = request->callback;
 276                saved_req.context = request->context;
 277
 278                /* release request entry in fifo */
 279                smp_wmb();
 280                request->desc = NULL;
 281
 282                /* increment fifo tail */
 283                priv->chan[ch].tail = (tail + 1) & (priv->fifo_len - 1);
 284
 285                spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags);
 286
 287                atomic_dec(&priv->chan[ch].submit_count);
 288
 289                saved_req.callback(dev, saved_req.desc, saved_req.context,
 290                                   status);
 291                /* channel may resume processing in single desc error case */
 292                if (error && !reset_ch && status == error)
 293                        return;
 294                spin_lock_irqsave(&priv->chan[ch].tail_lock, flags);
 295                tail = priv->chan[ch].tail;
 296        }
 297
 298        spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags);
 299}
 300
 301/*
 302 * process completed requests for channels that have done status
 303 */
 304#define DEF_TALITOS_DONE(name, ch_done_mask)                            \
 305static void talitos_done_##name(unsigned long data)                     \
 306{                                                                       \
 307        struct device *dev = (struct device *)data;                     \
 308        struct talitos_private *priv = dev_get_drvdata(dev);            \
 309        unsigned long flags;                                            \
 310                                                                        \
 311        if (ch_done_mask & 1)                                           \
 312                flush_channel(dev, 0, 0, 0);                            \
 313        if (priv->num_channels == 1)                                    \
 314                goto out;                                               \
 315        if (ch_done_mask & (1 << 2))                                    \
 316                flush_channel(dev, 1, 0, 0);                            \
 317        if (ch_done_mask & (1 << 4))                                    \
 318                flush_channel(dev, 2, 0, 0);                            \
 319        if (ch_done_mask & (1 << 6))                                    \
 320                flush_channel(dev, 3, 0, 0);                            \
 321                                                                        \
 322out:                                                                    \
 323        /* At this point, all completed channels have been processed */ \
 324        /* Unmask done interrupts for channels completed later on. */   \
 325        spin_lock_irqsave(&priv->reg_lock, flags);                      \
 326        setbits32(priv->reg + TALITOS_IMR, ch_done_mask);               \
 327        setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT);     \
 328        spin_unlock_irqrestore(&priv->reg_lock, flags);                 \
 329}
 330DEF_TALITOS_DONE(4ch, TALITOS_ISR_4CHDONE)
 331DEF_TALITOS_DONE(ch0_2, TALITOS_ISR_CH_0_2_DONE)
 332DEF_TALITOS_DONE(ch1_3, TALITOS_ISR_CH_1_3_DONE)
 333
 334/*
 335 * locate current (offending) descriptor
 336 */
 337static u32 current_desc_hdr(struct device *dev, int ch)
 338{
 339        struct talitos_private *priv = dev_get_drvdata(dev);
 340        int tail = priv->chan[ch].tail;
 341        dma_addr_t cur_desc;
 342
 343        cur_desc = in_be32(priv->chan[ch].reg + TALITOS_CDPR_LO);
 344
 345        while (priv->chan[ch].fifo[tail].dma_desc != cur_desc) {
 346                tail = (tail + 1) & (priv->fifo_len - 1);
 347                if (tail == priv->chan[ch].tail) {
 348                        dev_err(dev, "couldn't locate current descriptor\n");
 349                        return 0;
 350                }
 351        }
 352
 353        return priv->chan[ch].fifo[tail].desc->hdr;
 354}
 355
 356/*
 357 * user diagnostics; report root cause of error based on execution unit status
 358 */
 359static void report_eu_error(struct device *dev, int ch, u32 desc_hdr)
 360{
 361        struct talitos_private *priv = dev_get_drvdata(dev);
 362        int i;
 363
 364        if (!desc_hdr)
 365                desc_hdr = in_be32(priv->chan[ch].reg + TALITOS_DESCBUF);
 366
 367        switch (desc_hdr & DESC_HDR_SEL0_MASK) {
 368        case DESC_HDR_SEL0_AFEU:
 369                dev_err(dev, "AFEUISR 0x%08x_%08x\n",
 370                        in_be32(priv->reg + TALITOS_AFEUISR),
 371                        in_be32(priv->reg + TALITOS_AFEUISR_LO));
 372                break;
 373        case DESC_HDR_SEL0_DEU:
 374                dev_err(dev, "DEUISR 0x%08x_%08x\n",
 375                        in_be32(priv->reg + TALITOS_DEUISR),
 376                        in_be32(priv->reg + TALITOS_DEUISR_LO));
 377                break;
 378        case DESC_HDR_SEL0_MDEUA:
 379        case DESC_HDR_SEL0_MDEUB:
 380                dev_err(dev, "MDEUISR 0x%08x_%08x\n",
 381                        in_be32(priv->reg + TALITOS_MDEUISR),
 382                        in_be32(priv->reg + TALITOS_MDEUISR_LO));
 383                break;
 384        case DESC_HDR_SEL0_RNG:
 385                dev_err(dev, "RNGUISR 0x%08x_%08x\n",
 386                        in_be32(priv->reg + TALITOS_RNGUISR),
 387                        in_be32(priv->reg + TALITOS_RNGUISR_LO));
 388                break;
 389        case DESC_HDR_SEL0_PKEU:
 390                dev_err(dev, "PKEUISR 0x%08x_%08x\n",
 391                        in_be32(priv->reg + TALITOS_PKEUISR),
 392                        in_be32(priv->reg + TALITOS_PKEUISR_LO));
 393                break;
 394        case DESC_HDR_SEL0_AESU:
 395                dev_err(dev, "AESUISR 0x%08x_%08x\n",
 396                        in_be32(priv->reg + TALITOS_AESUISR),
 397                        in_be32(priv->reg + TALITOS_AESUISR_LO));
 398                break;
 399        case DESC_HDR_SEL0_CRCU:
 400                dev_err(dev, "CRCUISR 0x%08x_%08x\n",
 401                        in_be32(priv->reg + TALITOS_CRCUISR),
 402                        in_be32(priv->reg + TALITOS_CRCUISR_LO));
 403                break;
 404        case DESC_HDR_SEL0_KEU:
 405                dev_err(dev, "KEUISR 0x%08x_%08x\n",
 406                        in_be32(priv->reg + TALITOS_KEUISR),
 407                        in_be32(priv->reg + TALITOS_KEUISR_LO));
 408                break;
 409        }
 410
 411        switch (desc_hdr & DESC_HDR_SEL1_MASK) {
 412        case DESC_HDR_SEL1_MDEUA:
 413        case DESC_HDR_SEL1_MDEUB:
 414                dev_err(dev, "MDEUISR 0x%08x_%08x\n",
 415                        in_be32(priv->reg + TALITOS_MDEUISR),
 416                        in_be32(priv->reg + TALITOS_MDEUISR_LO));
 417                break;
 418        case DESC_HDR_SEL1_CRCU:
 419                dev_err(dev, "CRCUISR 0x%08x_%08x\n",
 420                        in_be32(priv->reg + TALITOS_CRCUISR),
 421                        in_be32(priv->reg + TALITOS_CRCUISR_LO));
 422                break;
 423        }
 424
 425        for (i = 0; i < 8; i++)
 426                dev_err(dev, "DESCBUF 0x%08x_%08x\n",
 427                        in_be32(priv->chan[ch].reg + TALITOS_DESCBUF + 8*i),
 428                        in_be32(priv->chan[ch].reg + TALITOS_DESCBUF_LO + 8*i));
 429}
 430
 431/*
 432 * recover from error interrupts
 433 */
 434static void talitos_error(struct device *dev, u32 isr, u32 isr_lo)
 435{
 436        struct talitos_private *priv = dev_get_drvdata(dev);
 437        unsigned int timeout = TALITOS_TIMEOUT;
 438        int ch, error, reset_dev = 0, reset_ch = 0;
 439        u32 v, v_lo;
 440
 441        for (ch = 0; ch < priv->num_channels; ch++) {
 442                /* skip channels without errors */
 443                if (!(isr & (1 << (ch * 2 + 1))))
 444                        continue;
 445
 446                error = -EINVAL;
 447
 448                v = in_be32(priv->chan[ch].reg + TALITOS_CCPSR);
 449                v_lo = in_be32(priv->chan[ch].reg + TALITOS_CCPSR_LO);
 450
 451                if (v_lo & TALITOS_CCPSR_LO_DOF) {
 452                        dev_err(dev, "double fetch fifo overflow error\n");
 453                        error = -EAGAIN;
 454                        reset_ch = 1;
 455                }
 456                if (v_lo & TALITOS_CCPSR_LO_SOF) {
 457                        /* h/w dropped descriptor */
 458                        dev_err(dev, "single fetch fifo overflow error\n");
 459                        error = -EAGAIN;
 460                }
 461                if (v_lo & TALITOS_CCPSR_LO_MDTE)
 462                        dev_err(dev, "master data transfer error\n");
 463                if (v_lo & TALITOS_CCPSR_LO_SGDLZ)
 464                        dev_err(dev, "s/g data length zero error\n");
 465                if (v_lo & TALITOS_CCPSR_LO_FPZ)
 466                        dev_err(dev, "fetch pointer zero error\n");
 467                if (v_lo & TALITOS_CCPSR_LO_IDH)
 468                        dev_err(dev, "illegal descriptor header error\n");
 469                if (v_lo & TALITOS_CCPSR_LO_IEU)
 470                        dev_err(dev, "invalid execution unit error\n");
 471                if (v_lo & TALITOS_CCPSR_LO_EU)
 472                        report_eu_error(dev, ch, current_desc_hdr(dev, ch));
 473                if (v_lo & TALITOS_CCPSR_LO_GB)
 474                        dev_err(dev, "gather boundary error\n");
 475                if (v_lo & TALITOS_CCPSR_LO_GRL)
 476                        dev_err(dev, "gather return/length error\n");
 477                if (v_lo & TALITOS_CCPSR_LO_SB)
 478                        dev_err(dev, "scatter boundary error\n");
 479                if (v_lo & TALITOS_CCPSR_LO_SRL)
 480                        dev_err(dev, "scatter return/length error\n");
 481
 482                flush_channel(dev, ch, error, reset_ch);
 483
 484                if (reset_ch) {
 485                        reset_channel(dev, ch);
 486                } else {
 487                        setbits32(priv->chan[ch].reg + TALITOS_CCCR,
 488                                  TALITOS_CCCR_CONT);
 489                        setbits32(priv->chan[ch].reg + TALITOS_CCCR_LO, 0);
 490                        while ((in_be32(priv->chan[ch].reg + TALITOS_CCCR) &
 491                               TALITOS_CCCR_CONT) && --timeout)
 492                                cpu_relax();
 493                        if (timeout == 0) {
 494                                dev_err(dev, "failed to restart channel %d\n",
 495                                        ch);
 496                                reset_dev = 1;
 497                        }
 498                }
 499        }
 500        if (reset_dev || isr & ~TALITOS_ISR_4CHERR || isr_lo) {
 501                dev_err(dev, "done overflow, internal time out, or rngu error: "
 502                        "ISR 0x%08x_%08x\n", isr, isr_lo);
 503
 504                /* purge request queues */
 505                for (ch = 0; ch < priv->num_channels; ch++)
 506                        flush_channel(dev, ch, -EIO, 1);
 507
 508                /* reset and reinitialize the device */
 509                init_device(dev);
 510        }
 511}
 512
 513#define DEF_TALITOS_INTERRUPT(name, ch_done_mask, ch_err_mask, tlet)           \
 514static irqreturn_t talitos_interrupt_##name(int irq, void *data)               \
 515{                                                                              \
 516        struct device *dev = data;                                             \
 517        struct talitos_private *priv = dev_get_drvdata(dev);                   \
 518        u32 isr, isr_lo;                                                       \
 519        unsigned long flags;                                                   \
 520                                                                               \
 521        spin_lock_irqsave(&priv->reg_lock, flags);                             \
 522        isr = in_be32(priv->reg + TALITOS_ISR);                                \
 523        isr_lo = in_be32(priv->reg + TALITOS_ISR_LO);                          \
 524        /* Acknowledge interrupt */                                            \
 525        out_be32(priv->reg + TALITOS_ICR, isr & (ch_done_mask | ch_err_mask)); \
 526        out_be32(priv->reg + TALITOS_ICR_LO, isr_lo);                          \
 527                                                                               \
 528        if (unlikely(isr & ch_err_mask || isr_lo)) {                           \
 529                spin_unlock_irqrestore(&priv->reg_lock, flags);                \
 530                talitos_error(dev, isr & ch_err_mask, isr_lo);                 \
 531        }                                                                      \
 532        else {                                                                 \
 533                if (likely(isr & ch_done_mask)) {                              \
 534                        /* mask further done interrupts. */                    \
 535                        clrbits32(priv->reg + TALITOS_IMR, ch_done_mask);      \
 536                        /* done_task will unmask done interrupts at exit */    \
 537                        tasklet_schedule(&priv->done_task[tlet]);              \
 538                }                                                              \
 539                spin_unlock_irqrestore(&priv->reg_lock, flags);                \
 540        }                                                                      \
 541                                                                               \
 542        return (isr & (ch_done_mask | ch_err_mask) || isr_lo) ? IRQ_HANDLED :  \
 543                                                                IRQ_NONE;      \
 544}
 545DEF_TALITOS_INTERRUPT(4ch, TALITOS_ISR_4CHDONE, TALITOS_ISR_4CHERR, 0)
 546DEF_TALITOS_INTERRUPT(ch0_2, TALITOS_ISR_CH_0_2_DONE, TALITOS_ISR_CH_0_2_ERR, 0)
 547DEF_TALITOS_INTERRUPT(ch1_3, TALITOS_ISR_CH_1_3_DONE, TALITOS_ISR_CH_1_3_ERR, 1)
 548
 549/*
 550 * hwrng
 551 */
 552static int talitos_rng_data_present(struct hwrng *rng, int wait)
 553{
 554        struct device *dev = (struct device *)rng->priv;
 555        struct talitos_private *priv = dev_get_drvdata(dev);
 556        u32 ofl;
 557        int i;
 558
 559        for (i = 0; i < 20; i++) {
 560                ofl = in_be32(priv->reg + TALITOS_RNGUSR_LO) &
 561                      TALITOS_RNGUSR_LO_OFL;
 562                if (ofl || !wait)
 563                        break;
 564                udelay(10);
 565        }
 566
 567        return !!ofl;
 568}
 569
 570static int talitos_rng_data_read(struct hwrng *rng, u32 *data)
 571{
 572        struct device *dev = (struct device *)rng->priv;
 573        struct talitos_private *priv = dev_get_drvdata(dev);
 574
 575        /* rng fifo requires 64-bit accesses */
 576        *data = in_be32(priv->reg + TALITOS_RNGU_FIFO);
 577        *data = in_be32(priv->reg + TALITOS_RNGU_FIFO_LO);
 578
 579        return sizeof(u32);
 580}
 581
 582static int talitos_rng_init(struct hwrng *rng)
 583{
 584        struct device *dev = (struct device *)rng->priv;
 585        struct talitos_private *priv = dev_get_drvdata(dev);
 586        unsigned int timeout = TALITOS_TIMEOUT;
 587
 588        setbits32(priv->reg + TALITOS_RNGURCR_LO, TALITOS_RNGURCR_LO_SR);
 589        while (!(in_be32(priv->reg + TALITOS_RNGUSR_LO) & TALITOS_RNGUSR_LO_RD)
 590               && --timeout)
 591                cpu_relax();
 592        if (timeout == 0) {
 593                dev_err(dev, "failed to reset rng hw\n");
 594                return -ENODEV;
 595        }
 596
 597        /* start generating */
 598        setbits32(priv->reg + TALITOS_RNGUDSR_LO, 0);
 599
 600        return 0;
 601}
 602
 603static int talitos_register_rng(struct device *dev)
 604{
 605        struct talitos_private *priv = dev_get_drvdata(dev);
 606
 607        priv->rng.name          = dev_driver_string(dev),
 608        priv->rng.init          = talitos_rng_init,
 609        priv->rng.data_present  = talitos_rng_data_present,
 610        priv->rng.data_read     = talitos_rng_data_read,
 611        priv->rng.priv          = (unsigned long)dev;
 612
 613        return hwrng_register(&priv->rng);
 614}
 615
 616static void talitos_unregister_rng(struct device *dev)
 617{
 618        struct talitos_private *priv = dev_get_drvdata(dev);
 619
 620        hwrng_unregister(&priv->rng);
 621}
 622
 623/*
 624 * crypto alg
 625 */
 626#define TALITOS_CRA_PRIORITY            3000
 627#define TALITOS_MAX_KEY_SIZE            96
 628#define TALITOS_MAX_IV_LENGTH           16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
 629
 630#define MD5_BLOCK_SIZE    64
 631
 632struct talitos_ctx {
 633        struct device *dev;
 634        int ch;
 635        __be32 desc_hdr_template;
 636        u8 key[TALITOS_MAX_KEY_SIZE];
 637        u8 iv[TALITOS_MAX_IV_LENGTH];
 638        unsigned int keylen;
 639        unsigned int enckeylen;
 640        unsigned int authkeylen;
 641        unsigned int authsize;
 642};
 643
 644#define HASH_MAX_BLOCK_SIZE             SHA512_BLOCK_SIZE
 645#define TALITOS_MDEU_MAX_CONTEXT_SIZE   TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512
 646
 647struct talitos_ahash_req_ctx {
 648        u32 hw_context[TALITOS_MDEU_MAX_CONTEXT_SIZE / sizeof(u32)];
 649        unsigned int hw_context_size;
 650        u8 buf[HASH_MAX_BLOCK_SIZE];
 651        u8 bufnext[HASH_MAX_BLOCK_SIZE];
 652        unsigned int swinit;
 653        unsigned int first;
 654        unsigned int last;
 655        unsigned int to_hash_later;
 656        u64 nbuf;
 657        struct scatterlist bufsl[2];
 658        struct scatterlist *psrc;
 659};
 660
 661static int aead_setauthsize(struct crypto_aead *authenc,
 662                            unsigned int authsize)
 663{
 664        struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
 665
 666        ctx->authsize = authsize;
 667
 668        return 0;
 669}
 670
 671static int aead_setkey(struct crypto_aead *authenc,
 672                       const u8 *key, unsigned int keylen)
 673{
 674        struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
 675        struct rtattr *rta = (void *)key;
 676        struct crypto_authenc_key_param *param;
 677        unsigned int authkeylen;
 678        unsigned int enckeylen;
 679
 680        if (!RTA_OK(rta, keylen))
 681                goto badkey;
 682
 683        if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
 684                goto badkey;
 685
 686        if (RTA_PAYLOAD(rta) < sizeof(*param))
 687                goto badkey;
 688
 689        param = RTA_DATA(rta);
 690        enckeylen = be32_to_cpu(param->enckeylen);
 691
 692        key += RTA_ALIGN(rta->rta_len);
 693        keylen -= RTA_ALIGN(rta->rta_len);
 694
 695        if (keylen < enckeylen)
 696                goto badkey;
 697
 698        authkeylen = keylen - enckeylen;
 699
 700        if (keylen > TALITOS_MAX_KEY_SIZE)
 701                goto badkey;
 702
 703        memcpy(&ctx->key, key, keylen);
 704
 705        ctx->keylen = keylen;
 706        ctx->enckeylen = enckeylen;
 707        ctx->authkeylen = authkeylen;
 708
 709        return 0;
 710
 711badkey:
 712        crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN);
 713        return -EINVAL;
 714}
 715
 716/*
 717 * talitos_edesc - s/w-extended descriptor
 718 * @assoc_nents: number of segments in associated data scatterlist
 719 * @src_nents: number of segments in input scatterlist
 720 * @dst_nents: number of segments in output scatterlist
 721 * @assoc_chained: whether assoc is chained or not
 722 * @src_chained: whether src is chained or not
 723 * @dst_chained: whether dst is chained or not
 724 * @iv_dma: dma address of iv for checking continuity and link table
 725 * @dma_len: length of dma mapped link_tbl space
 726 * @dma_link_tbl: bus physical address of link_tbl
 727 * @desc: h/w descriptor
 728 * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1)
 729 *
 730 * if decrypting (with authcheck), or either one of src_nents or dst_nents
 731 * is greater than 1, an integrity check value is concatenated to the end
 732 * of link_tbl data
 733 */
 734struct talitos_edesc {
 735        int assoc_nents;
 736        int src_nents;
 737        int dst_nents;
 738        bool assoc_chained;
 739        bool src_chained;
 740        bool dst_chained;
 741        dma_addr_t iv_dma;
 742        int dma_len;
 743        dma_addr_t dma_link_tbl;
 744        struct talitos_desc desc;
 745        struct talitos_ptr link_tbl[0];
 746};
 747
 748static int talitos_map_sg(struct device *dev, struct scatterlist *sg,
 749                          unsigned int nents, enum dma_data_direction dir,
 750                          bool chained)
 751{
 752        if (unlikely(chained))
 753                while (sg) {
 754                        dma_map_sg(dev, sg, 1, dir);
 755                        sg = scatterwalk_sg_next(sg);
 756                }
 757        else
 758                dma_map_sg(dev, sg, nents, dir);
 759        return nents;
 760}
 761
 762static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg,
 763                                   enum dma_data_direction dir)
 764{
 765        while (sg) {
 766                dma_unmap_sg(dev, sg, 1, dir);
 767                sg = scatterwalk_sg_next(sg);
 768        }
 769}
 770
 771static void talitos_sg_unmap(struct device *dev,
 772                             struct talitos_edesc *edesc,
 773                             struct scatterlist *src,
 774                             struct scatterlist *dst)
 775{
 776        unsigned int src_nents = edesc->src_nents ? : 1;
 777        unsigned int dst_nents = edesc->dst_nents ? : 1;
 778
 779        if (src != dst) {
 780                if (edesc->src_chained)
 781                        talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE);
 782                else
 783                        dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
 784
 785                if (dst) {
 786                        if (edesc->dst_chained)
 787                                talitos_unmap_sg_chain(dev, dst,
 788                                                       DMA_FROM_DEVICE);
 789                        else
 790                                dma_unmap_sg(dev, dst, dst_nents,
 791                                             DMA_FROM_DEVICE);
 792                }
 793        } else
 794                if (edesc->src_chained)
 795                        talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL);
 796                else
 797                        dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
 798}
 799
 800static void ipsec_esp_unmap(struct device *dev,
 801                            struct talitos_edesc *edesc,
 802                            struct aead_request *areq)
 803{
 804        unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE);
 805        unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE);
 806        unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
 807        unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE);
 808
 809        if (edesc->assoc_chained)
 810                talitos_unmap_sg_chain(dev, areq->assoc, DMA_TO_DEVICE);
 811        else
 812                /* assoc_nents counts also for IV in non-contiguous cases */
 813                dma_unmap_sg(dev, areq->assoc,
 814                             edesc->assoc_nents ? edesc->assoc_nents - 1 : 1,
 815                             DMA_TO_DEVICE);
 816
 817        talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
 818
 819        if (edesc->dma_len)
 820                dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
 821                                 DMA_BIDIRECTIONAL);
 822}
 823
 824/*
 825 * ipsec_esp descriptor callbacks
 826 */
 827static void ipsec_esp_encrypt_done(struct device *dev,
 828                                   struct talitos_desc *desc, void *context,
 829                                   int err)
 830{
 831        struct aead_request *areq = context;
 832        struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
 833        struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
 834        struct talitos_edesc *edesc;
 835        struct scatterlist *sg;
 836        void *icvdata;
 837
 838        edesc = container_of(desc, struct talitos_edesc, desc);
 839
 840        ipsec_esp_unmap(dev, edesc, areq);
 841
 842        /* copy the generated ICV to dst */
 843        if (edesc->dst_nents) {
 844                icvdata = &edesc->link_tbl[edesc->src_nents +
 845                                           edesc->dst_nents + 2 +
 846                                           edesc->assoc_nents];
 847                sg = sg_last(areq->dst, edesc->dst_nents);
 848                memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize,
 849                       icvdata, ctx->authsize);
 850        }
 851
 852        kfree(edesc);
 853
 854        aead_request_complete(areq, err);
 855}
 856
 857static void ipsec_esp_decrypt_swauth_done(struct device *dev,
 858                                          struct talitos_desc *desc,
 859                                          void *context, int err)
 860{
 861        struct aead_request *req = context;
 862        struct crypto_aead *authenc = crypto_aead_reqtfm(req);
 863        struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
 864        struct talitos_edesc *edesc;
 865        struct scatterlist *sg;
 866        void *icvdata;
 867
 868        edesc = container_of(desc, struct talitos_edesc, desc);
 869
 870        ipsec_esp_unmap(dev, edesc, req);
 871
 872        if (!err) {
 873                /* auth check */
 874                if (edesc->dma_len)
 875                        icvdata = &edesc->link_tbl[edesc->src_nents +
 876                                                   edesc->dst_nents + 2 +
 877                                                   edesc->assoc_nents];
 878                else
 879                        icvdata = &edesc->link_tbl[0];
 880
 881                sg = sg_last(req->dst, edesc->dst_nents ? : 1);
 882                err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length -
 883                             ctx->authsize, ctx->authsize) ? -EBADMSG : 0;
 884        }
 885
 886        kfree(edesc);
 887
 888        aead_request_complete(req, err);
 889}
 890
 891static void ipsec_esp_decrypt_hwauth_done(struct device *dev,
 892                                          struct talitos_desc *desc,
 893                                          void *context, int err)
 894{
 895        struct aead_request *req = context;
 896        struct talitos_edesc *edesc;
 897
 898        edesc = container_of(desc, struct talitos_edesc, desc);
 899
 900        ipsec_esp_unmap(dev, edesc, req);
 901
 902        /* check ICV auth status */
 903        if (!err && ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) !=
 904                     DESC_HDR_LO_ICCR1_PASS))
 905                err = -EBADMSG;
 906
 907        kfree(edesc);
 908
 909        aead_request_complete(req, err);
 910}
 911
 912/*
 913 * convert scatterlist to SEC h/w link table format
 914 * stop at cryptlen bytes
 915 */
 916static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
 917                           int cryptlen, struct talitos_ptr *link_tbl_ptr)
 918{
 919        int n_sg = sg_count;
 920
 921        while (n_sg--) {
 922                to_talitos_ptr(link_tbl_ptr, sg_dma_address(sg));
 923                link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg));
 924                link_tbl_ptr->j_extent = 0;
 925                link_tbl_ptr++;
 926                cryptlen -= sg_dma_len(sg);
 927                sg = scatterwalk_sg_next(sg);
 928        }
 929
 930        /* adjust (decrease) last one (or two) entry's len to cryptlen */
 931        link_tbl_ptr--;
 932        while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) {
 933                /* Empty this entry, and move to previous one */
 934                cryptlen += be16_to_cpu(link_tbl_ptr->len);
 935                link_tbl_ptr->len = 0;
 936                sg_count--;
 937                link_tbl_ptr--;
 938        }
 939        link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len)
 940                                        + cryptlen);
 941
 942        /* tag end of link table */
 943        link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
 944
 945        return sg_count;
 946}
 947
 948/*
 949 * fill in and submit ipsec_esp descriptor
 950 */
 951static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
 952                     u64 seq, void (*callback) (struct device *dev,
 953                                                struct talitos_desc *desc,
 954                                                void *context, int error))
 955{
 956        struct crypto_aead *aead = crypto_aead_reqtfm(areq);
 957        struct talitos_ctx *ctx = crypto_aead_ctx(aead);
 958        struct device *dev = ctx->dev;
 959        struct talitos_desc *desc = &edesc->desc;
 960        unsigned int cryptlen = areq->cryptlen;
 961        unsigned int authsize = ctx->authsize;
 962        unsigned int ivsize = crypto_aead_ivsize(aead);
 963        int sg_count, ret;
 964        int sg_link_tbl_len;
 965
 966        /* hmac key */
 967        map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
 968                               0, DMA_TO_DEVICE);
 969
 970        /* hmac data */
 971        desc->ptr[1].len = cpu_to_be16(areq->assoclen + ivsize);
 972        if (edesc->assoc_nents) {
 973                int tbl_off = edesc->src_nents + edesc->dst_nents + 2;
 974                struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off];
 975
 976                to_talitos_ptr(&desc->ptr[1], edesc->dma_link_tbl + tbl_off *
 977                               sizeof(struct talitos_ptr));
 978                desc->ptr[1].j_extent = DESC_PTR_LNKTBL_JUMP;
 979
 980                /* assoc_nents - 1 entries for assoc, 1 for IV */
 981                sg_count = sg_to_link_tbl(areq->assoc, edesc->assoc_nents - 1,
 982                                          areq->assoclen, tbl_ptr);
 983
 984                /* add IV to link table */
 985                tbl_ptr += sg_count - 1;
 986                tbl_ptr->j_extent = 0;
 987                tbl_ptr++;
 988                to_talitos_ptr(tbl_ptr, edesc->iv_dma);
 989                tbl_ptr->len = cpu_to_be16(ivsize);
 990                tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
 991
 992                dma_sync_single_for_device(dev, edesc->dma_link_tbl,
 993                                           edesc->dma_len, DMA_BIDIRECTIONAL);
 994        } else {
 995                to_talitos_ptr(&desc->ptr[1], sg_dma_address(areq->assoc));
 996                desc->ptr[1].j_extent = 0;
 997        }
 998
 999        /* cipher iv */
1000        to_talitos_ptr(&desc->ptr[2], edesc->iv_dma);
1001        desc->ptr[2].len = cpu_to_be16(ivsize);
1002        desc->ptr[2].j_extent = 0;
1003        /* Sync needed for the aead_givencrypt case */
1004        dma_sync_single_for_device(dev, edesc->iv_dma, ivsize, DMA_TO_DEVICE);
1005
1006        /* cipher key */
1007        map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen,
1008                               (char *)&ctx->key + ctx->authkeylen, 0,
1009                               DMA_TO_DEVICE);
1010
1011        /*
1012         * cipher in
1013         * map and adjust cipher len to aead request cryptlen.
1014         * extent is bytes of HMAC postpended to ciphertext,
1015         * typically 12 for ipsec
1016         */
1017        desc->ptr[4].len = cpu_to_be16(cryptlen);
1018        desc->ptr[4].j_extent = authsize;
1019
1020        sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
1021                                  (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
1022                                                           : DMA_TO_DEVICE,
1023                                  edesc->src_chained);
1024
1025        if (sg_count == 1) {
1026                to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src));
1027        } else {
1028                sg_link_tbl_len = cryptlen;
1029
1030                if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV)
1031                        sg_link_tbl_len = cryptlen + authsize;
1032
1033                sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len,
1034                                          &edesc->link_tbl[0]);
1035                if (sg_count > 1) {
1036                        desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
1037                        to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl);
1038                        dma_sync_single_for_device(dev, edesc->dma_link_tbl,
1039                                                   edesc->dma_len,
1040                                                   DMA_BIDIRECTIONAL);
1041                } else {
1042                        /* Only one segment now, so no link tbl needed */
1043                        to_talitos_ptr(&desc->ptr[4],
1044                                       sg_dma_address(areq->src));
1045                }
1046        }
1047
1048        /* cipher out */
1049        desc->ptr[5].len = cpu_to_be16(cryptlen);
1050        desc->ptr[5].j_extent = authsize;
1051
1052        if (areq->src != areq->dst)
1053                sg_count = talitos_map_sg(dev, areq->dst,
1054                                          edesc->dst_nents ? : 1,
1055                                          DMA_FROM_DEVICE, edesc->dst_chained);
1056
1057        if (sg_count == 1) {
1058                to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst));
1059        } else {
1060                int tbl_off = edesc->src_nents + 1;
1061                struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off];
1062
1063                to_talitos_ptr(&desc->ptr[5], edesc->dma_link_tbl +
1064                               tbl_off * sizeof(struct talitos_ptr));
1065                sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
1066                                          tbl_ptr);
1067
1068                /* Add an entry to the link table for ICV data */
1069                tbl_ptr += sg_count - 1;
1070                tbl_ptr->j_extent = 0;
1071                tbl_ptr++;
1072                tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
1073                tbl_ptr->len = cpu_to_be16(authsize);
1074
1075                /* icv data follows link tables */
1076                to_talitos_ptr(tbl_ptr, edesc->dma_link_tbl +
1077                               (tbl_off + edesc->dst_nents + 1 +
1078                                edesc->assoc_nents) *
1079                               sizeof(struct talitos_ptr));
1080                desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP;
1081                dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
1082                                           edesc->dma_len, DMA_BIDIRECTIONAL);
1083        }
1084
1085        /* iv out */
1086        map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0,
1087                               DMA_FROM_DEVICE);
1088
1089        ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
1090        if (ret != -EINPROGRESS) {
1091                ipsec_esp_unmap(dev, edesc, areq);
1092                kfree(edesc);
1093        }
1094        return ret;
1095}
1096
1097/*
1098 * derive number of elements in scatterlist
1099 */
1100static int sg_count(struct scatterlist *sg_list, int nbytes, bool *chained)
1101{
1102        struct scatterlist *sg = sg_list;
1103        int sg_nents = 0;
1104
1105        *chained = false;
1106        while (nbytes > 0) {
1107                sg_nents++;
1108                nbytes -= sg->length;
1109                if (!sg_is_last(sg) && (sg + 1)->length == 0)
1110                        *chained = true;
1111                sg = scatterwalk_sg_next(sg);
1112        }
1113
1114        return sg_nents;
1115}
1116
1117/**
1118 * sg_copy_end_to_buffer - Copy end data from SG list to a linear buffer
1119 * @sgl:                 The SG list
1120 * @nents:               Number of SG entries
1121 * @buf:                 Where to copy to
1122 * @buflen:              The number of bytes to copy
1123 * @skip:                The number of bytes to skip before copying.
1124 *                       Note: skip + buflen should equal SG total size.
1125 *
1126 * Returns the number of copied bytes.
1127 *
1128 **/
1129static size_t sg_copy_end_to_buffer(struct scatterlist *sgl, unsigned int nents,
1130                                    void *buf, size_t buflen, unsigned int skip)
1131{
1132        unsigned int offset = 0;
1133        unsigned int boffset = 0;
1134        struct sg_mapping_iter miter;
1135        unsigned long flags;
1136        unsigned int sg_flags = SG_MITER_ATOMIC;
1137        size_t total_buffer = buflen + skip;
1138
1139        sg_flags |= SG_MITER_FROM_SG;
1140
1141        sg_miter_start(&miter, sgl, nents, sg_flags);
1142
1143        local_irq_save(flags);
1144
1145        while (sg_miter_next(&miter) && offset < total_buffer) {
1146                unsigned int len;
1147                unsigned int ignore;
1148
1149                if ((offset + miter.length) > skip) {
1150                        if (offset < skip) {
1151                                /* Copy part of this segment */
1152                                ignore = skip - offset;
1153                                len = miter.length - ignore;
1154                                if (boffset + len > buflen)
1155                                        len = buflen - boffset;
1156                                memcpy(buf + boffset, miter.addr + ignore, len);
1157                        } else {
1158                                /* Copy all of this segment (up to buflen) */
1159                                len = miter.length;
1160                                if (boffset + len > buflen)
1161                                        len = buflen - boffset;
1162                                memcpy(buf + boffset, miter.addr, len);
1163                        }
1164                        boffset += len;
1165                }
1166                offset += miter.length;
1167        }
1168
1169        sg_miter_stop(&miter);
1170
1171        local_irq_restore(flags);
1172        return boffset;
1173}
1174
1175/*
1176 * allocate and map the extended descriptor
1177 */
1178static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
1179                                                 struct scatterlist *assoc,
1180                                                 struct scatterlist *src,
1181                                                 struct scatterlist *dst,
1182                                                 u8 *iv,
1183                                                 unsigned int assoclen,
1184                                                 unsigned int cryptlen,
1185                                                 unsigned int authsize,
1186                                                 unsigned int ivsize,
1187                                                 int icv_stashing,
1188                                                 u32 cryptoflags)
1189{
1190        struct talitos_edesc *edesc;
1191        int assoc_nents = 0, src_nents, dst_nents, alloc_len, dma_len;
1192        bool assoc_chained = false, src_chained = false, dst_chained = false;
1193        dma_addr_t iv_dma = 0;
1194        gfp_t flags = cryptoflags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
1195                      GFP_ATOMIC;
1196
1197        if (cryptlen + authsize > TALITOS_MAX_DATA_LEN) {
1198                dev_err(dev, "length exceeds h/w max limit\n");
1199                return ERR_PTR(-EINVAL);
1200        }
1201
1202        if (iv)
1203                iv_dma = dma_map_single(dev, iv, ivsize, DMA_TO_DEVICE);
1204
1205        if (assoc) {
1206                /*
1207                 * Currently it is assumed that iv is provided whenever assoc
1208                 * is.
1209                 */
1210                BUG_ON(!iv);
1211
1212                assoc_nents = sg_count(assoc, assoclen, &assoc_chained);
1213                talitos_map_sg(dev, assoc, assoc_nents, DMA_TO_DEVICE,
1214                               assoc_chained);
1215                assoc_nents = (assoc_nents == 1) ? 0 : assoc_nents;
1216
1217                if (assoc_nents || sg_dma_address(assoc) + assoclen != iv_dma)
1218                        assoc_nents = assoc_nents ? assoc_nents + 1 : 2;
1219        }
1220
1221        src_nents = sg_count(src, cryptlen + authsize, &src_chained);
1222        src_nents = (src_nents == 1) ? 0 : src_nents;
1223
1224        if (!dst) {
1225                dst_nents = 0;
1226        } else {
1227                if (dst == src) {
1228                        dst_nents = src_nents;
1229                } else {
1230                        dst_nents = sg_count(dst, cryptlen + authsize,
1231                                             &dst_chained);
1232                        dst_nents = (dst_nents == 1) ? 0 : dst_nents;
1233                }
1234        }
1235
1236        /*
1237         * allocate space for base edesc plus the link tables,
1238         * allowing for two separate entries for ICV and generated ICV (+ 2),
1239         * and the ICV data itself
1240         */
1241        alloc_len = sizeof(struct talitos_edesc);
1242        if (assoc_nents || src_nents || dst_nents) {
1243                dma_len = (src_nents + dst_nents + 2 + assoc_nents) *
1244                          sizeof(struct talitos_ptr) + authsize;
1245                alloc_len += dma_len;
1246        } else {
1247                dma_len = 0;
1248                alloc_len += icv_stashing ? authsize : 0;
1249        }
1250
1251        edesc = kmalloc(alloc_len, GFP_DMA | flags);
1252        if (!edesc) {
1253                talitos_unmap_sg_chain(dev, assoc, DMA_TO_DEVICE);
1254                if (iv_dma)
1255                        dma_unmap_single(dev, iv_dma, ivsize, DMA_TO_DEVICE);
1256                dev_err(dev, "could not allocate edescriptor\n");
1257                return ERR_PTR(-ENOMEM);
1258        }
1259
1260        edesc->assoc_nents = assoc_nents;
1261        edesc->src_nents = src_nents;
1262        edesc->dst_nents = dst_nents;
1263        edesc->assoc_chained = assoc_chained;
1264        edesc->src_chained = src_chained;
1265        edesc->dst_chained = dst_chained;
1266        edesc->iv_dma = iv_dma;
1267        edesc->dma_len = dma_len;
1268        if (dma_len)
1269                edesc->dma_link_tbl = dma_map_single(dev, &edesc->link_tbl[0],
1270                                                     edesc->dma_len,
1271                                                     DMA_BIDIRECTIONAL);
1272
1273        return edesc;
1274}
1275
1276static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq, u8 *iv,
1277                                              int icv_stashing)
1278{
1279        struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
1280        struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1281        unsigned int ivsize = crypto_aead_ivsize(authenc);
1282
1283        return talitos_edesc_alloc(ctx->dev, areq->assoc, areq->src, areq->dst,
1284                                   iv, areq->assoclen, areq->cryptlen,
1285                                   ctx->authsize, ivsize, icv_stashing,
1286                                   areq->base.flags);
1287}
1288
1289static int aead_encrypt(struct aead_request *req)
1290{
1291        struct crypto_aead *authenc = crypto_aead_reqtfm(req);
1292        struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1293        struct talitos_edesc *edesc;
1294
1295        /* allocate extended descriptor */
1296        edesc = aead_edesc_alloc(req, req->iv, 0);
1297        if (IS_ERR(edesc))
1298                return PTR_ERR(edesc);
1299
1300        /* set encrypt */
1301        edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1302
1303        return ipsec_esp(edesc, req, 0, ipsec_esp_encrypt_done);
1304}
1305
1306static int aead_decrypt(struct aead_request *req)
1307{
1308        struct crypto_aead *authenc = crypto_aead_reqtfm(req);
1309        struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1310        unsigned int authsize = ctx->authsize;
1311        struct talitos_private *priv = dev_get_drvdata(ctx->dev);
1312        struct talitos_edesc *edesc;
1313        struct scatterlist *sg;
1314        void *icvdata;
1315
1316        req->cryptlen -= authsize;
1317
1318        /* allocate extended descriptor */
1319        edesc = aead_edesc_alloc(req, req->iv, 1);
1320        if (IS_ERR(edesc))
1321                return PTR_ERR(edesc);
1322
1323        if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) &&
1324            ((!edesc->src_nents && !edesc->dst_nents) ||
1325             priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT)) {
1326
1327                /* decrypt and check the ICV */
1328                edesc->desc.hdr = ctx->desc_hdr_template |
1329                                  DESC_HDR_DIR_INBOUND |
1330                                  DESC_HDR_MODE1_MDEU_CICV;
1331
1332                /* reset integrity check result bits */
1333                edesc->desc.hdr_lo = 0;
1334
1335                return ipsec_esp(edesc, req, 0, ipsec_esp_decrypt_hwauth_done);
1336        }
1337
1338        /* Have to check the ICV with software */
1339        edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
1340
1341        /* stash incoming ICV for later cmp with ICV generated by the h/w */
1342        if (edesc->dma_len)
1343                icvdata = &edesc->link_tbl[edesc->src_nents +
1344                                           edesc->dst_nents + 2 +
1345                                           edesc->assoc_nents];
1346        else
1347                icvdata = &edesc->link_tbl[0];
1348
1349        sg = sg_last(req->src, edesc->src_nents ? : 1);
1350
1351        memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize,
1352               ctx->authsize);
1353
1354        return ipsec_esp(edesc, req, 0, ipsec_esp_decrypt_swauth_done);
1355}
1356
1357static int aead_givencrypt(struct aead_givcrypt_request *req)
1358{
1359        struct aead_request *areq = &req->areq;
1360        struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
1361        struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1362        struct talitos_edesc *edesc;
1363
1364        /* allocate extended descriptor */
1365        edesc = aead_edesc_alloc(areq, req->giv, 0);
1366        if (IS_ERR(edesc))
1367                return PTR_ERR(edesc);
1368
1369        /* set encrypt */
1370        edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1371
1372        memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
1373        /* avoid consecutive packets going out with same IV */
1374        *(__be64 *)req->giv ^= cpu_to_be64(req->seq);
1375
1376        return ipsec_esp(edesc, areq, req->seq, ipsec_esp_encrypt_done);
1377}
1378
1379static int ablkcipher_setkey(struct crypto_ablkcipher *cipher,
1380                             const u8 *key, unsigned int keylen)
1381{
1382        struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1383
1384        memcpy(&ctx->key, key, keylen);
1385        ctx->keylen = keylen;
1386
1387        return 0;
1388}
1389
1390static void common_nonsnoop_unmap(struct device *dev,
1391                                  struct talitos_edesc *edesc,
1392                                  struct ablkcipher_request *areq)
1393{
1394        unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
1395        unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
1396        unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1], DMA_TO_DEVICE);
1397
1398        talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
1399
1400        if (edesc->dma_len)
1401                dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
1402                                 DMA_BIDIRECTIONAL);
1403}
1404
1405static void ablkcipher_done(struct device *dev,
1406                            struct talitos_desc *desc, void *context,
1407                            int err)
1408{
1409        struct ablkcipher_request *areq = context;
1410        struct talitos_edesc *edesc;
1411
1412        edesc = container_of(desc, struct talitos_edesc, desc);
1413
1414        common_nonsnoop_unmap(dev, edesc, areq);
1415
1416        kfree(edesc);
1417
1418        areq->base.complete(&areq->base, err);
1419}
1420
1421static int common_nonsnoop(struct talitos_edesc *edesc,
1422                           struct ablkcipher_request *areq,
1423                           void (*callback) (struct device *dev,
1424                                             struct talitos_desc *desc,
1425                                             void *context, int error))
1426{
1427        struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1428        struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1429        struct device *dev = ctx->dev;
1430        struct talitos_desc *desc = &edesc->desc;
1431        unsigned int cryptlen = areq->nbytes;
1432        unsigned int ivsize = crypto_ablkcipher_ivsize(cipher);
1433        int sg_count, ret;
1434
1435        /* first DWORD empty */
1436        desc->ptr[0].len = 0;
1437        to_talitos_ptr(&desc->ptr[0], 0);
1438        desc->ptr[0].j_extent = 0;
1439
1440        /* cipher iv */
1441        to_talitos_ptr(&desc->ptr[1], edesc->iv_dma);
1442        desc->ptr[1].len = cpu_to_be16(ivsize);
1443        desc->ptr[1].j_extent = 0;
1444
1445        /* cipher key */
1446        map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
1447                               (char *)&ctx->key, 0, DMA_TO_DEVICE);
1448
1449        /*
1450         * cipher in
1451         */
1452        desc->ptr[3].len = cpu_to_be16(cryptlen);
1453        desc->ptr[3].j_extent = 0;
1454
1455        sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
1456                                  (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
1457                                                           : DMA_TO_DEVICE,
1458                                  edesc->src_chained);
1459
1460        if (sg_count == 1) {
1461                to_talitos_ptr(&desc->ptr[3], sg_dma_address(areq->src));
1462        } else {
1463                sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen,
1464                                          &edesc->link_tbl[0]);
1465                if (sg_count > 1) {
1466                        to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
1467                        desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
1468                        dma_sync_single_for_device(dev, edesc->dma_link_tbl,
1469                                                   edesc->dma_len,
1470                                                   DMA_BIDIRECTIONAL);
1471                } else {
1472                        /* Only one segment now, so no link tbl needed */
1473                        to_talitos_ptr(&desc->ptr[3],
1474                                       sg_dma_address(areq->src));
1475                }
1476        }
1477
1478        /* cipher out */
1479        desc->ptr[4].len = cpu_to_be16(cryptlen);
1480        desc->ptr[4].j_extent = 0;
1481
1482        if (areq->src != areq->dst)
1483                sg_count = talitos_map_sg(dev, areq->dst,
1484                                          edesc->dst_nents ? : 1,
1485                                          DMA_FROM_DEVICE, edesc->dst_chained);
1486
1487        if (sg_count == 1) {
1488                to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->dst));
1489        } else {
1490                struct talitos_ptr *link_tbl_ptr =
1491                        &edesc->link_tbl[edesc->src_nents + 1];
1492
1493                to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl +
1494                                              (edesc->src_nents + 1) *
1495                                              sizeof(struct talitos_ptr));
1496                desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
1497                sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
1498                                          link_tbl_ptr);
1499                dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
1500                                           edesc->dma_len, DMA_BIDIRECTIONAL);
1501        }
1502
1503        /* iv out */
1504        map_single_talitos_ptr(dev, &desc->ptr[5], ivsize, ctx->iv, 0,
1505                               DMA_FROM_DEVICE);
1506
1507        /* last DWORD empty */
1508        desc->ptr[6].len = 0;
1509        to_talitos_ptr(&desc->ptr[6], 0);
1510        desc->ptr[6].j_extent = 0;
1511
1512        ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
1513        if (ret != -EINPROGRESS) {
1514                common_nonsnoop_unmap(dev, edesc, areq);
1515                kfree(edesc);
1516        }
1517        return ret;
1518}
1519
1520static struct talitos_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request *
1521                                                    areq)
1522{
1523        struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1524        struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1525        unsigned int ivsize = crypto_ablkcipher_ivsize(cipher);
1526
1527        return talitos_edesc_alloc(ctx->dev, NULL, areq->src, areq->dst,
1528                                   areq->info, 0, areq->nbytes, 0, ivsize, 0,
1529                                   areq->base.flags);
1530}
1531
1532static int ablkcipher_encrypt(struct ablkcipher_request *areq)
1533{
1534        struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1535        struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1536        struct talitos_edesc *edesc;
1537
1538        /* allocate extended descriptor */
1539        edesc = ablkcipher_edesc_alloc(areq);
1540        if (IS_ERR(edesc))
1541                return PTR_ERR(edesc);
1542
1543        /* set encrypt */
1544        edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1545
1546        return common_nonsnoop(edesc, areq, ablkcipher_done);
1547}
1548
1549static int ablkcipher_decrypt(struct ablkcipher_request *areq)
1550{
1551        struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1552        struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1553        struct talitos_edesc *edesc;
1554
1555        /* allocate extended descriptor */
1556        edesc = ablkcipher_edesc_alloc(areq);
1557        if (IS_ERR(edesc))
1558                return PTR_ERR(edesc);
1559
1560        edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
1561
1562        return common_nonsnoop(edesc, areq, ablkcipher_done);
1563}
1564
1565static void common_nonsnoop_hash_unmap(struct device *dev,
1566                                       struct talitos_edesc *edesc,
1567                                       struct ahash_request *areq)
1568{
1569        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1570
1571        unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
1572
1573        /* When using hashctx-in, must unmap it. */
1574        if (edesc->desc.ptr[1].len)
1575                unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1],
1576                                         DMA_TO_DEVICE);
1577
1578        if (edesc->desc.ptr[2].len)
1579                unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2],
1580                                         DMA_TO_DEVICE);
1581
1582        talitos_sg_unmap(dev, edesc, req_ctx->psrc, NULL);
1583
1584        if (edesc->dma_len)
1585                dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
1586                                 DMA_BIDIRECTIONAL);
1587
1588}
1589
1590static void ahash_done(struct device *dev,
1591                       struct talitos_desc *desc, void *context,
1592                       int err)
1593{
1594        struct ahash_request *areq = context;
1595        struct talitos_edesc *edesc =
1596                 container_of(desc, struct talitos_edesc, desc);
1597        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1598
1599        if (!req_ctx->last && req_ctx->to_hash_later) {
1600                /* Position any partial block for next update/final/finup */
1601                memcpy(req_ctx->buf, req_ctx->bufnext, req_ctx->to_hash_later);
1602                req_ctx->nbuf = req_ctx->to_hash_later;
1603        }
1604        common_nonsnoop_hash_unmap(dev, edesc, areq);
1605
1606        kfree(edesc);
1607
1608        areq->base.complete(&areq->base, err);
1609}
1610
1611static int common_nonsnoop_hash(struct talitos_edesc *edesc,
1612                                struct ahash_request *areq, unsigned int length,
1613                                void (*callback) (struct device *dev,
1614                                                  struct talitos_desc *desc,
1615                                                  void *context, int error))
1616{
1617        struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1618        struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1619        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1620        struct device *dev = ctx->dev;
1621        struct talitos_desc *desc = &edesc->desc;
1622        int sg_count, ret;
1623
1624        /* first DWORD empty */
1625        desc->ptr[0] = zero_entry;
1626
1627        /* hash context in */
1628        if (!req_ctx->first || req_ctx->swinit) {
1629                map_single_talitos_ptr(dev, &desc->ptr[1],
1630                                       req_ctx->hw_context_size,
1631                                       (char *)req_ctx->hw_context, 0,
1632                                       DMA_TO_DEVICE);
1633                req_ctx->swinit = 0;
1634        } else {
1635                desc->ptr[1] = zero_entry;
1636                /* Indicate next op is not the first. */
1637                req_ctx->first = 0;
1638        }
1639
1640        /* HMAC key */
1641        if (ctx->keylen)
1642                map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
1643                                       (char *)&ctx->key, 0, DMA_TO_DEVICE);
1644        else
1645                desc->ptr[2] = zero_entry;
1646
1647        /*
1648         * data in
1649         */
1650        desc->ptr[3].len = cpu_to_be16(length);
1651        desc->ptr[3].j_extent = 0;
1652
1653        sg_count = talitos_map_sg(dev, req_ctx->psrc,
1654                                  edesc->src_nents ? : 1,
1655                                  DMA_TO_DEVICE, edesc->src_chained);
1656
1657        if (sg_count == 1) {
1658                to_talitos_ptr(&desc->ptr[3], sg_dma_address(req_ctx->psrc));
1659        } else {
1660                sg_count = sg_to_link_tbl(req_ctx->psrc, sg_count, length,
1661                                          &edesc->link_tbl[0]);
1662                if (sg_count > 1) {
1663                        desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
1664                        to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
1665                        dma_sync_single_for_device(ctx->dev,
1666                                                   edesc->dma_link_tbl,
1667                                                   edesc->dma_len,
1668                                                   DMA_BIDIRECTIONAL);
1669                } else {
1670                        /* Only one segment now, so no link tbl needed */
1671                        to_talitos_ptr(&desc->ptr[3],
1672                                       sg_dma_address(req_ctx->psrc));
1673                }
1674        }
1675
1676        /* fifth DWORD empty */
1677        desc->ptr[4] = zero_entry;
1678
1679        /* hash/HMAC out -or- hash context out */
1680        if (req_ctx->last)
1681                map_single_talitos_ptr(dev, &desc->ptr[5],
1682                                       crypto_ahash_digestsize(tfm),
1683                                       areq->result, 0, DMA_FROM_DEVICE);
1684        else
1685                map_single_talitos_ptr(dev, &desc->ptr[5],
1686                                       req_ctx->hw_context_size,
1687                                       req_ctx->hw_context, 0, DMA_FROM_DEVICE);
1688
1689        /* last DWORD empty */
1690        desc->ptr[6] = zero_entry;
1691
1692        ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
1693        if (ret != -EINPROGRESS) {
1694                common_nonsnoop_hash_unmap(dev, edesc, areq);
1695                kfree(edesc);
1696        }
1697        return ret;
1698}
1699
1700static struct talitos_edesc *ahash_edesc_alloc(struct ahash_request *areq,
1701                                               unsigned int nbytes)
1702{
1703        struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1704        struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1705        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1706
1707        return talitos_edesc_alloc(ctx->dev, NULL, req_ctx->psrc, NULL, NULL, 0,
1708                                   nbytes, 0, 0, 0, areq->base.flags);
1709}
1710
1711static int ahash_init(struct ahash_request *areq)
1712{
1713        struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1714        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1715
1716        /* Initialize the context */
1717        req_ctx->nbuf = 0;
1718        req_ctx->first = 1; /* first indicates h/w must init its context */
1719        req_ctx->swinit = 0; /* assume h/w init of context */
1720        req_ctx->hw_context_size =
1721                (crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE)
1722                        ? TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256
1723                        : TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512;
1724
1725        return 0;
1726}
1727
1728/*
1729 * on h/w without explicit sha224 support, we initialize h/w context
1730 * manually with sha224 constants, and tell it to run sha256.
1731 */
1732static int ahash_init_sha224_swinit(struct ahash_request *areq)
1733{
1734        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1735
1736        ahash_init(areq);
1737        req_ctx->swinit = 1;/* prevent h/w initting context with sha256 values*/
1738
1739        req_ctx->hw_context[0] = SHA224_H0;
1740        req_ctx->hw_context[1] = SHA224_H1;
1741        req_ctx->hw_context[2] = SHA224_H2;
1742        req_ctx->hw_context[3] = SHA224_H3;
1743        req_ctx->hw_context[4] = SHA224_H4;
1744        req_ctx->hw_context[5] = SHA224_H5;
1745        req_ctx->hw_context[6] = SHA224_H6;
1746        req_ctx->hw_context[7] = SHA224_H7;
1747
1748        /* init 64-bit count */
1749        req_ctx->hw_context[8] = 0;
1750        req_ctx->hw_context[9] = 0;
1751
1752        return 0;
1753}
1754
1755static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes)
1756{
1757        struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1758        struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1759        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1760        struct talitos_edesc *edesc;
1761        unsigned int blocksize =
1762                        crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
1763        unsigned int nbytes_to_hash;
1764        unsigned int to_hash_later;
1765        unsigned int nsg;
1766        bool chained;
1767
1768        if (!req_ctx->last && (nbytes + req_ctx->nbuf <= blocksize)) {
1769                /* Buffer up to one whole block */
1770                sg_copy_to_buffer(areq->src,
1771                                  sg_count(areq->src, nbytes, &chained),
1772                                  req_ctx->buf + req_ctx->nbuf, nbytes);
1773                req_ctx->nbuf += nbytes;
1774                return 0;
1775        }
1776
1777        /* At least (blocksize + 1) bytes are available to hash */
1778        nbytes_to_hash = nbytes + req_ctx->nbuf;
1779        to_hash_later = nbytes_to_hash & (blocksize - 1);
1780
1781        if (req_ctx->last)
1782                to_hash_later = 0;
1783        else if (to_hash_later)
1784                /* There is a partial block. Hash the full block(s) now */
1785                nbytes_to_hash -= to_hash_later;
1786        else {
1787                /* Keep one block buffered */
1788                nbytes_to_hash -= blocksize;
1789                to_hash_later = blocksize;
1790        }
1791
1792        /* Chain in any previously buffered data */
1793        if (req_ctx->nbuf) {
1794                nsg = (req_ctx->nbuf < nbytes_to_hash) ? 2 : 1;
1795                sg_init_table(req_ctx->bufsl, nsg);
1796                sg_set_buf(req_ctx->bufsl, req_ctx->buf, req_ctx->nbuf);
1797                if (nsg > 1)
1798                        scatterwalk_sg_chain(req_ctx->bufsl, 2, areq->src);
1799                req_ctx->psrc = req_ctx->bufsl;
1800        } else
1801                req_ctx->psrc = areq->src;
1802
1803        if (to_hash_later) {
1804                int nents = sg_count(areq->src, nbytes, &chained);
1805                sg_copy_end_to_buffer(areq->src, nents,
1806                                      req_ctx->bufnext,
1807                                      to_hash_later,
1808                                      nbytes - to_hash_later);
1809        }
1810        req_ctx->to_hash_later = to_hash_later;
1811
1812        /* Allocate extended descriptor */
1813        edesc = ahash_edesc_alloc(areq, nbytes_to_hash);
1814        if (IS_ERR(edesc))
1815                return PTR_ERR(edesc);
1816
1817        edesc->desc.hdr = ctx->desc_hdr_template;
1818
1819        /* On last one, request SEC to pad; otherwise continue */
1820        if (req_ctx->last)
1821                edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_PAD;
1822        else
1823                edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_CONT;
1824
1825        /* request SEC to INIT hash. */
1826        if (req_ctx->first && !req_ctx->swinit)
1827                edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_INIT;
1828
1829        /* When the tfm context has a keylen, it's an HMAC.
1830         * A first or last (ie. not middle) descriptor must request HMAC.
1831         */
1832        if (ctx->keylen && (req_ctx->first || req_ctx->last))
1833                edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_HMAC;
1834
1835        return common_nonsnoop_hash(edesc, areq, nbytes_to_hash,
1836                                    ahash_done);
1837}
1838
1839static int ahash_update(struct ahash_request *areq)
1840{
1841        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1842
1843        req_ctx->last = 0;
1844
1845        return ahash_process_req(areq, areq->nbytes);
1846}
1847
1848static int ahash_final(struct ahash_request *areq)
1849{
1850        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1851
1852        req_ctx->last = 1;
1853
1854        return ahash_process_req(areq, 0);
1855}
1856
1857static int ahash_finup(struct ahash_request *areq)
1858{
1859        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1860
1861        req_ctx->last = 1;
1862
1863        return ahash_process_req(areq, areq->nbytes);
1864}
1865
1866static int ahash_digest(struct ahash_request *areq)
1867{
1868        struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1869        struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
1870
1871        ahash->init(areq);
1872        req_ctx->last = 1;
1873
1874        return ahash_process_req(areq, areq->nbytes);
1875}
1876
1877struct keyhash_result {
1878        struct completion completion;
1879        int err;
1880};
1881
1882static void keyhash_complete(struct crypto_async_request *req, int err)
1883{
1884        struct keyhash_result *res = req->data;
1885
1886        if (err == -EINPROGRESS)
1887                return;
1888
1889        res->err = err;
1890        complete(&res->completion);
1891}
1892
1893static int keyhash(struct crypto_ahash *tfm, const u8 *key, unsigned int keylen,
1894                   u8 *hash)
1895{
1896        struct talitos_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
1897
1898        struct scatterlist sg[1];
1899        struct ahash_request *req;
1900        struct keyhash_result hresult;
1901        int ret;
1902
1903        init_completion(&hresult.completion);
1904
1905        req = ahash_request_alloc(tfm, GFP_KERNEL);
1906        if (!req)
1907                return -ENOMEM;
1908
1909        /* Keep tfm keylen == 0 during hash of the long key */
1910        ctx->keylen = 0;
1911        ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
1912                                   keyhash_complete, &hresult);
1913
1914        sg_init_one(&sg[0], key, keylen);
1915
1916        ahash_request_set_crypt(req, sg, hash, keylen);
1917        ret = crypto_ahash_digest(req);
1918        switch (ret) {
1919        case 0:
1920                break;
1921        case -EINPROGRESS:
1922        case -EBUSY:
1923                ret = wait_for_completion_interruptible(
1924                        &hresult.completion);
1925                if (!ret)
1926                        ret = hresult.err;
1927                break;
1928        default:
1929                break;
1930        }
1931        ahash_request_free(req);
1932
1933        return ret;
1934}
1935
1936static int ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
1937                        unsigned int keylen)
1938{
1939        struct talitos_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
1940        unsigned int blocksize =
1941                        crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
1942        unsigned int digestsize = crypto_ahash_digestsize(tfm);
1943        unsigned int keysize = keylen;
1944        u8 hash[SHA512_DIGEST_SIZE];
1945        int ret;
1946
1947        if (keylen <= blocksize)
1948                memcpy(ctx->key, key, keysize);
1949        else {
1950                /* Must get the hash of the long key */
1951                ret = keyhash(tfm, key, keylen, hash);
1952
1953                if (ret) {
1954                        crypto_ahash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
1955                        return -EINVAL;
1956                }
1957
1958                keysize = digestsize;
1959                memcpy(ctx->key, hash, digestsize);
1960        }
1961
1962        ctx->keylen = keysize;
1963
1964        return 0;
1965}
1966
1967
1968struct talitos_alg_template {
1969        u32 type;
1970        union {
1971                struct crypto_alg crypto;
1972                struct ahash_alg hash;
1973        } alg;
1974        __be32 desc_hdr_template;
1975};
1976
1977static struct talitos_alg_template driver_algs[] = {
1978        /*
1979         * AEAD algorithms. These use a single-pass ipsec_esp descriptor.
1980         * authencesn(*,*) is also registered, although not present
1981         * explicitly here.
1982         */
1983        {       .type = CRYPTO_ALG_TYPE_AEAD,
1984                .alg.crypto = {
1985                        .cra_name = "authenc(hmac(sha1),cbc(aes))",
1986                        .cra_driver_name = "authenc-hmac-sha1-cbc-aes-talitos",
1987                        .cra_blocksize = AES_BLOCK_SIZE,
1988                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1989                        .cra_aead = {
1990                                .ivsize = AES_BLOCK_SIZE,
1991                                .maxauthsize = SHA1_DIGEST_SIZE,
1992                        }
1993                },
1994                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1995                                     DESC_HDR_SEL0_AESU |
1996                                     DESC_HDR_MODE0_AESU_CBC |
1997                                     DESC_HDR_SEL1_MDEUA |
1998                                     DESC_HDR_MODE1_MDEU_INIT |
1999                                     DESC_HDR_MODE1_MDEU_PAD |
2000                                     DESC_HDR_MODE1_MDEU_SHA1_HMAC,
2001        },
2002        {       .type = CRYPTO_ALG_TYPE_AEAD,
2003                .alg.crypto = {
2004                        .cra_name = "authenc(hmac(sha1),cbc(des3_ede))",
2005                        .cra_driver_name = "authenc-hmac-sha1-cbc-3des-talitos",
2006                        .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2007                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2008                        .cra_aead = {
2009                                .ivsize = DES3_EDE_BLOCK_SIZE,
2010                                .maxauthsize = SHA1_DIGEST_SIZE,
2011                        }
2012                },
2013                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2014                                     DESC_HDR_SEL0_DEU |
2015                                     DESC_HDR_MODE0_DEU_CBC |
2016                                     DESC_HDR_MODE0_DEU_3DES |
2017                                     DESC_HDR_SEL1_MDEUA |
2018                                     DESC_HDR_MODE1_MDEU_INIT |
2019                                     DESC_HDR_MODE1_MDEU_PAD |
2020                                     DESC_HDR_MODE1_MDEU_SHA1_HMAC,
2021        },
2022        {       .type = CRYPTO_ALG_TYPE_AEAD,
2023                .alg.crypto = {
2024                        .cra_name = "authenc(hmac(sha224),cbc(aes))",
2025                        .cra_driver_name = "authenc-hmac-sha224-cbc-aes-talitos",
2026                        .cra_blocksize = AES_BLOCK_SIZE,
2027                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2028                        .cra_aead = {
2029                                .ivsize = AES_BLOCK_SIZE,
2030                                .maxauthsize = SHA224_DIGEST_SIZE,
2031                        }
2032                },
2033                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2034                                     DESC_HDR_SEL0_AESU |
2035                                     DESC_HDR_MODE0_AESU_CBC |
2036                                     DESC_HDR_SEL1_MDEUA |
2037                                     DESC_HDR_MODE1_MDEU_INIT |
2038                                     DESC_HDR_MODE1_MDEU_PAD |
2039                                     DESC_HDR_MODE1_MDEU_SHA224_HMAC,
2040        },
2041        {       .type = CRYPTO_ALG_TYPE_AEAD,
2042                .alg.crypto = {
2043                        .cra_name = "authenc(hmac(sha224),cbc(des3_ede))",
2044                        .cra_driver_name = "authenc-hmac-sha224-cbc-3des-talitos",
2045                        .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2046                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2047                        .cra_aead = {
2048                                .ivsize = DES3_EDE_BLOCK_SIZE,
2049                                .maxauthsize = SHA224_DIGEST_SIZE,
2050                        }
2051                },
2052                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2053                                     DESC_HDR_SEL0_DEU |
2054                                     DESC_HDR_MODE0_DEU_CBC |
2055                                     DESC_HDR_MODE0_DEU_3DES |
2056                                     DESC_HDR_SEL1_MDEUA |
2057                                     DESC_HDR_MODE1_MDEU_INIT |
2058                                     DESC_HDR_MODE1_MDEU_PAD |
2059                                     DESC_HDR_MODE1_MDEU_SHA224_HMAC,
2060        },
2061        {       .type = CRYPTO_ALG_TYPE_AEAD,
2062                .alg.crypto = {
2063                        .cra_name = "authenc(hmac(sha256),cbc(aes))",
2064                        .cra_driver_name = "authenc-hmac-sha256-cbc-aes-talitos",
2065                        .cra_blocksize = AES_BLOCK_SIZE,
2066                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2067                        .cra_aead = {
2068                                .ivsize = AES_BLOCK_SIZE,
2069                                .maxauthsize = SHA256_DIGEST_SIZE,
2070                        }
2071                },
2072                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2073                                     DESC_HDR_SEL0_AESU |
2074                                     DESC_HDR_MODE0_AESU_CBC |
2075                                     DESC_HDR_SEL1_MDEUA |
2076                                     DESC_HDR_MODE1_MDEU_INIT |
2077                                     DESC_HDR_MODE1_MDEU_PAD |
2078                                     DESC_HDR_MODE1_MDEU_SHA256_HMAC,
2079        },
2080        {       .type = CRYPTO_ALG_TYPE_AEAD,
2081                .alg.crypto = {
2082                        .cra_name = "authenc(hmac(sha256),cbc(des3_ede))",
2083                        .cra_driver_name = "authenc-hmac-sha256-cbc-3des-talitos",
2084                        .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2085                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2086                        .cra_aead = {
2087                                .ivsize = DES3_EDE_BLOCK_SIZE,
2088                                .maxauthsize = SHA256_DIGEST_SIZE,
2089                        }
2090                },
2091                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2092                                     DESC_HDR_SEL0_DEU |
2093                                     DESC_HDR_MODE0_DEU_CBC |
2094                                     DESC_HDR_MODE0_DEU_3DES |
2095                                     DESC_HDR_SEL1_MDEUA |
2096                                     DESC_HDR_MODE1_MDEU_INIT |
2097                                     DESC_HDR_MODE1_MDEU_PAD |
2098                                     DESC_HDR_MODE1_MDEU_SHA256_HMAC,
2099        },
2100        {       .type = CRYPTO_ALG_TYPE_AEAD,
2101                .alg.crypto = {
2102                        .cra_name = "authenc(hmac(sha384),cbc(aes))",
2103                        .cra_driver_name = "authenc-hmac-sha384-cbc-aes-talitos",
2104                        .cra_blocksize = AES_BLOCK_SIZE,
2105                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2106                        .cra_aead = {
2107                                .ivsize = AES_BLOCK_SIZE,
2108                                .maxauthsize = SHA384_DIGEST_SIZE,
2109                        }
2110                },
2111                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2112                                     DESC_HDR_SEL0_AESU |
2113                                     DESC_HDR_MODE0_AESU_CBC |
2114                                     DESC_HDR_SEL1_MDEUB |
2115                                     DESC_HDR_MODE1_MDEU_INIT |
2116                                     DESC_HDR_MODE1_MDEU_PAD |
2117                                     DESC_HDR_MODE1_MDEUB_SHA384_HMAC,
2118        },
2119        {       .type = CRYPTO_ALG_TYPE_AEAD,
2120                .alg.crypto = {
2121                        .cra_name = "authenc(hmac(sha384),cbc(des3_ede))",
2122                        .cra_driver_name = "authenc-hmac-sha384-cbc-3des-talitos",
2123                        .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2124                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2125                        .cra_aead = {
2126                                .ivsize = DES3_EDE_BLOCK_SIZE,
2127                                .maxauthsize = SHA384_DIGEST_SIZE,
2128                        }
2129                },
2130                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2131                                     DESC_HDR_SEL0_DEU |
2132                                     DESC_HDR_MODE0_DEU_CBC |
2133                                     DESC_HDR_MODE0_DEU_3DES |
2134                                     DESC_HDR_SEL1_MDEUB |
2135                                     DESC_HDR_MODE1_MDEU_INIT |
2136                                     DESC_HDR_MODE1_MDEU_PAD |
2137                                     DESC_HDR_MODE1_MDEUB_SHA384_HMAC,
2138        },
2139        {       .type = CRYPTO_ALG_TYPE_AEAD,
2140                .alg.crypto = {
2141                        .cra_name = "authenc(hmac(sha512),cbc(aes))",
2142                        .cra_driver_name = "authenc-hmac-sha512-cbc-aes-talitos",
2143                        .cra_blocksize = AES_BLOCK_SIZE,
2144                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2145                        .cra_aead = {
2146                                .ivsize = AES_BLOCK_SIZE,
2147                                .maxauthsize = SHA512_DIGEST_SIZE,
2148                        }
2149                },
2150                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2151                                     DESC_HDR_SEL0_AESU |
2152                                     DESC_HDR_MODE0_AESU_CBC |
2153                                     DESC_HDR_SEL1_MDEUB |
2154                                     DESC_HDR_MODE1_MDEU_INIT |
2155                                     DESC_HDR_MODE1_MDEU_PAD |
2156                                     DESC_HDR_MODE1_MDEUB_SHA512_HMAC,
2157        },
2158        {       .type = CRYPTO_ALG_TYPE_AEAD,
2159                .alg.crypto = {
2160                        .cra_name = "authenc(hmac(sha512),cbc(des3_ede))",
2161                        .cra_driver_name = "authenc-hmac-sha512-cbc-3des-talitos",
2162                        .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2163                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2164                        .cra_aead = {
2165                                .ivsize = DES3_EDE_BLOCK_SIZE,
2166                                .maxauthsize = SHA512_DIGEST_SIZE,
2167                        }
2168                },
2169                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2170                                     DESC_HDR_SEL0_DEU |
2171                                     DESC_HDR_MODE0_DEU_CBC |
2172                                     DESC_HDR_MODE0_DEU_3DES |
2173                                     DESC_HDR_SEL1_MDEUB |
2174                                     DESC_HDR_MODE1_MDEU_INIT |
2175                                     DESC_HDR_MODE1_MDEU_PAD |
2176                                     DESC_HDR_MODE1_MDEUB_SHA512_HMAC,
2177        },
2178        {       .type = CRYPTO_ALG_TYPE_AEAD,
2179                .alg.crypto = {
2180                        .cra_name = "authenc(hmac(md5),cbc(aes))",
2181                        .cra_driver_name = "authenc-hmac-md5-cbc-aes-talitos",
2182                        .cra_blocksize = AES_BLOCK_SIZE,
2183                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2184                        .cra_aead = {
2185                                .ivsize = AES_BLOCK_SIZE,
2186                                .maxauthsize = MD5_DIGEST_SIZE,
2187                        }
2188                },
2189                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2190                                     DESC_HDR_SEL0_AESU |
2191                                     DESC_HDR_MODE0_AESU_CBC |
2192                                     DESC_HDR_SEL1_MDEUA |
2193                                     DESC_HDR_MODE1_MDEU_INIT |
2194                                     DESC_HDR_MODE1_MDEU_PAD |
2195                                     DESC_HDR_MODE1_MDEU_MD5_HMAC,
2196        },
2197        {       .type = CRYPTO_ALG_TYPE_AEAD,
2198                .alg.crypto = {
2199                        .cra_name = "authenc(hmac(md5),cbc(des3_ede))",
2200                        .cra_driver_name = "authenc-hmac-md5-cbc-3des-talitos",
2201                        .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2202                        .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2203                        .cra_aead = {
2204                                .ivsize = DES3_EDE_BLOCK_SIZE,
2205                                .maxauthsize = MD5_DIGEST_SIZE,
2206                        }
2207                },
2208                .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2209                                     DESC_HDR_SEL0_DEU |
2210                                     DESC_HDR_MODE0_DEU_CBC |
2211                                     DESC_HDR_MODE0_DEU_3DES |
2212                                     DESC_HDR_SEL1_MDEUA |
2213                                     DESC_HDR_MODE1_MDEU_INIT |
2214                                     DESC_HDR_MODE1_MDEU_PAD |
2215                                     DESC_HDR_MODE1_MDEU_MD5_HMAC,
2216        },
2217        /* ABLKCIPHER algorithms. */
2218        {       .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
2219                .alg.crypto = {
2220                        .cra_name = "cbc(aes)",
2221                        .cra_driver_name = "cbc-aes-talitos",
2222                        .cra_blocksize = AES_BLOCK_SIZE,
2223                        .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2224                                     CRYPTO_ALG_ASYNC,
2225                        .cra_ablkcipher = {
2226                                .min_keysize = AES_MIN_KEY_SIZE,
2227                                .max_keysize = AES_MAX_KEY_SIZE,
2228                                .ivsize = AES_BLOCK_SIZE,
2229                        }
2230                },
2231                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2232                                     DESC_HDR_SEL0_AESU |
2233                                     DESC_HDR_MODE0_AESU_CBC,
2234        },
2235        {       .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
2236                .alg.crypto = {
2237                        .cra_name = "cbc(des3_ede)",
2238                        .cra_driver_name = "cbc-3des-talitos",
2239                        .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2240                        .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2241                                     CRYPTO_ALG_ASYNC,
2242                        .cra_ablkcipher = {
2243                                .min_keysize = DES3_EDE_KEY_SIZE,
2244                                .max_keysize = DES3_EDE_KEY_SIZE,
2245                                .ivsize = DES3_EDE_BLOCK_SIZE,
2246                        }
2247                },
2248                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2249                                     DESC_HDR_SEL0_DEU |
2250                                     DESC_HDR_MODE0_DEU_CBC |
2251                                     DESC_HDR_MODE0_DEU_3DES,
2252        },
2253        /* AHASH algorithms. */
2254        {       .type = CRYPTO_ALG_TYPE_AHASH,
2255                .alg.hash = {
2256                        .halg.digestsize = MD5_DIGEST_SIZE,
2257                        .halg.base = {
2258                                .cra_name = "md5",
2259                                .cra_driver_name = "md5-talitos",
2260                                .cra_blocksize = MD5_BLOCK_SIZE,
2261                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2262                                             CRYPTO_ALG_ASYNC,
2263                        }
2264                },
2265                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2266                                     DESC_HDR_SEL0_MDEUA |
2267                                     DESC_HDR_MODE0_MDEU_MD5,
2268        },
2269        {       .type = CRYPTO_ALG_TYPE_AHASH,
2270                .alg.hash = {
2271                        .halg.digestsize = SHA1_DIGEST_SIZE,
2272                        .halg.base = {
2273                                .cra_name = "sha1",
2274                                .cra_driver_name = "sha1-talitos",
2275                                .cra_blocksize = SHA1_BLOCK_SIZE,
2276                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2277                                             CRYPTO_ALG_ASYNC,
2278                        }
2279                },
2280                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2281                                     DESC_HDR_SEL0_MDEUA |
2282                                     DESC_HDR_MODE0_MDEU_SHA1,
2283        },
2284        {       .type = CRYPTO_ALG_TYPE_AHASH,
2285                .alg.hash = {
2286                        .halg.digestsize = SHA224_DIGEST_SIZE,
2287                        .halg.base = {
2288                                .cra_name = "sha224",
2289                                .cra_driver_name = "sha224-talitos",
2290                                .cra_blocksize = SHA224_BLOCK_SIZE,
2291                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2292                                             CRYPTO_ALG_ASYNC,
2293                        }
2294                },
2295                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2296                                     DESC_HDR_SEL0_MDEUA |
2297                                     DESC_HDR_MODE0_MDEU_SHA224,
2298        },
2299        {       .type = CRYPTO_ALG_TYPE_AHASH,
2300                .alg.hash = {
2301                        .halg.digestsize = SHA256_DIGEST_SIZE,
2302                        .halg.base = {
2303                                .cra_name = "sha256",
2304                                .cra_driver_name = "sha256-talitos",
2305                                .cra_blocksize = SHA256_BLOCK_SIZE,
2306                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2307                                             CRYPTO_ALG_ASYNC,
2308                        }
2309                },
2310                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2311                                     DESC_HDR_SEL0_MDEUA |
2312                                     DESC_HDR_MODE0_MDEU_SHA256,
2313        },
2314        {       .type = CRYPTO_ALG_TYPE_AHASH,
2315                .alg.hash = {
2316                        .halg.digestsize = SHA384_DIGEST_SIZE,
2317                        .halg.base = {
2318                                .cra_name = "sha384",
2319                                .cra_driver_name = "sha384-talitos",
2320                                .cra_blocksize = SHA384_BLOCK_SIZE,
2321                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2322                                             CRYPTO_ALG_ASYNC,
2323                        }
2324                },
2325                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2326                                     DESC_HDR_SEL0_MDEUB |
2327                                     DESC_HDR_MODE0_MDEUB_SHA384,
2328        },
2329        {       .type = CRYPTO_ALG_TYPE_AHASH,
2330                .alg.hash = {
2331                        .halg.digestsize = SHA512_DIGEST_SIZE,
2332                        .halg.base = {
2333                                .cra_name = "sha512",
2334                                .cra_driver_name = "sha512-talitos",
2335                                .cra_blocksize = SHA512_BLOCK_SIZE,
2336                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2337                                             CRYPTO_ALG_ASYNC,
2338                        }
2339                },
2340                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2341                                     DESC_HDR_SEL0_MDEUB |
2342                                     DESC_HDR_MODE0_MDEUB_SHA512,
2343        },
2344        {       .type = CRYPTO_ALG_TYPE_AHASH,
2345                .alg.hash = {
2346                        .halg.digestsize = MD5_DIGEST_SIZE,
2347                        .halg.base = {
2348                                .cra_name = "hmac(md5)",
2349                                .cra_driver_name = "hmac-md5-talitos",
2350                                .cra_blocksize = MD5_BLOCK_SIZE,
2351                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2352                                             CRYPTO_ALG_ASYNC,
2353                        }
2354                },
2355                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2356                                     DESC_HDR_SEL0_MDEUA |
2357                                     DESC_HDR_MODE0_MDEU_MD5,
2358        },
2359        {       .type = CRYPTO_ALG_TYPE_AHASH,
2360                .alg.hash = {
2361                        .halg.digestsize = SHA1_DIGEST_SIZE,
2362                        .halg.base = {
2363                                .cra_name = "hmac(sha1)",
2364                                .cra_driver_name = "hmac-sha1-talitos",
2365                                .cra_blocksize = SHA1_BLOCK_SIZE,
2366                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2367                                             CRYPTO_ALG_ASYNC,
2368                        }
2369                },
2370                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2371                                     DESC_HDR_SEL0_MDEUA |
2372                                     DESC_HDR_MODE0_MDEU_SHA1,
2373        },
2374        {       .type = CRYPTO_ALG_TYPE_AHASH,
2375                .alg.hash = {
2376                        .halg.digestsize = SHA224_DIGEST_SIZE,
2377                        .halg.base = {
2378                                .cra_name = "hmac(sha224)",
2379                                .cra_driver_name = "hmac-sha224-talitos",
2380                                .cra_blocksize = SHA224_BLOCK_SIZE,
2381                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2382                                             CRYPTO_ALG_ASYNC,
2383                        }
2384                },
2385                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2386                                     DESC_HDR_SEL0_MDEUA |
2387                                     DESC_HDR_MODE0_MDEU_SHA224,
2388        },
2389        {       .type = CRYPTO_ALG_TYPE_AHASH,
2390                .alg.hash = {
2391                        .halg.digestsize = SHA256_DIGEST_SIZE,
2392                        .halg.base = {
2393                                .cra_name = "hmac(sha256)",
2394                                .cra_driver_name = "hmac-sha256-talitos",
2395                                .cra_blocksize = SHA256_BLOCK_SIZE,
2396                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2397                                             CRYPTO_ALG_ASYNC,
2398                        }
2399                },
2400                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2401                                     DESC_HDR_SEL0_MDEUA |
2402                                     DESC_HDR_MODE0_MDEU_SHA256,
2403        },
2404        {       .type = CRYPTO_ALG_TYPE_AHASH,
2405                .alg.hash = {
2406                        .halg.digestsize = SHA384_DIGEST_SIZE,
2407                        .halg.base = {
2408                                .cra_name = "hmac(sha384)",
2409                                .cra_driver_name = "hmac-sha384-talitos",
2410                                .cra_blocksize = SHA384_BLOCK_SIZE,
2411                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2412                                             CRYPTO_ALG_ASYNC,
2413                        }
2414                },
2415                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2416                                     DESC_HDR_SEL0_MDEUB |
2417                                     DESC_HDR_MODE0_MDEUB_SHA384,
2418        },
2419        {       .type = CRYPTO_ALG_TYPE_AHASH,
2420                .alg.hash = {
2421                        .halg.digestsize = SHA512_DIGEST_SIZE,
2422                        .halg.base = {
2423                                .cra_name = "hmac(sha512)",
2424                                .cra_driver_name = "hmac-sha512-talitos",
2425                                .cra_blocksize = SHA512_BLOCK_SIZE,
2426                                .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2427                                             CRYPTO_ALG_ASYNC,
2428                        }
2429                },
2430                .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2431                                     DESC_HDR_SEL0_MDEUB |
2432                                     DESC_HDR_MODE0_MDEUB_SHA512,
2433        }
2434};
2435
2436struct talitos_crypto_alg {
2437        struct list_head entry;
2438        struct device *dev;
2439        struct talitos_alg_template algt;
2440};
2441
2442static int talitos_cra_init(struct crypto_tfm *tfm)
2443{
2444        struct crypto_alg *alg = tfm->__crt_alg;
2445        struct talitos_crypto_alg *talitos_alg;
2446        struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2447        struct talitos_private *priv;
2448
2449        if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_AHASH)
2450                talitos_alg = container_of(__crypto_ahash_alg(alg),
2451                                           struct talitos_crypto_alg,
2452                                           algt.alg.hash);
2453        else
2454                talitos_alg = container_of(alg, struct talitos_crypto_alg,
2455                                           algt.alg.crypto);
2456
2457        /* update context with ptr to dev */
2458        ctx->dev = talitos_alg->dev;
2459
2460        /* assign SEC channel to tfm in round-robin fashion */
2461        priv = dev_get_drvdata(ctx->dev);
2462        ctx->ch = atomic_inc_return(&priv->last_chan) &
2463                  (priv->num_channels - 1);
2464
2465        /* copy descriptor header template value */
2466        ctx->desc_hdr_template = talitos_alg->algt.desc_hdr_template;
2467
2468        /* select done notification */
2469        ctx->desc_hdr_template |= DESC_HDR_DONE_NOTIFY;
2470
2471        return 0;
2472}
2473
2474static int talitos_cra_init_aead(struct crypto_tfm *tfm)
2475{
2476        struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2477
2478        talitos_cra_init(tfm);
2479
2480        /* random first IV */
2481        get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH);
2482
2483        return 0;
2484}
2485
2486static int talitos_cra_init_ahash(struct crypto_tfm *tfm)
2487{
2488        struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2489
2490        talitos_cra_init(tfm);
2491
2492        ctx->keylen = 0;
2493        crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
2494                                 sizeof(struct talitos_ahash_req_ctx));
2495
2496        return 0;
2497}
2498
2499/*
2500 * given the alg's descriptor header template, determine whether descriptor
2501 * type and primary/secondary execution units required match the hw
2502 * capabilities description provided in the device tree node.
2503 */
2504static int hw_supports(struct device *dev, __be32 desc_hdr_template)
2505{
2506        struct talitos_private *priv = dev_get_drvdata(dev);
2507        int ret;
2508
2509        ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) &&
2510              (1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units);
2511
2512        if (SECONDARY_EU(desc_hdr_template))
2513                ret = ret && (1 << SECONDARY_EU(desc_hdr_template)
2514                              & priv->exec_units);
2515
2516        return ret;
2517}
2518
2519static int talitos_remove(struct platform_device *ofdev)
2520{
2521        struct device *dev = &ofdev->dev;
2522        struct talitos_private *priv = dev_get_drvdata(dev);
2523        struct talitos_crypto_alg *t_alg, *n;
2524        int i;
2525
2526        list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) {
2527                switch (t_alg->algt.type) {
2528                case CRYPTO_ALG_TYPE_ABLKCIPHER:
2529                case CRYPTO_ALG_TYPE_AEAD:
2530                        crypto_unregister_alg(&t_alg->algt.alg.crypto);
2531                        break;
2532                case CRYPTO_ALG_TYPE_AHASH:
2533                        crypto_unregister_ahash(&t_alg->algt.alg.hash);
2534                        break;
2535                }
2536                list_del(&t_alg->entry);
2537                kfree(t_alg);
2538        }
2539
2540        if (hw_supports(dev, DESC_HDR_SEL0_RNG))
2541                talitos_unregister_rng(dev);
2542
2543        for (i = 0; i < priv->num_channels; i++)
2544                kfree(priv->chan[i].fifo);
2545
2546        kfree(priv->chan);
2547
2548        for (i = 0; i < 2; i++)
2549                if (priv->irq[i]) {
2550                        free_irq(priv->irq[i], dev);
2551                        irq_dispose_mapping(priv->irq[i]);
2552                }
2553
2554        tasklet_kill(&priv->done_task[0]);
2555        if (priv->irq[1])
2556                tasklet_kill(&priv->done_task[1]);
2557
2558        iounmap(priv->reg);
2559
2560        dev_set_drvdata(dev, NULL);
2561
2562        kfree(priv);
2563
2564        return 0;
2565}
2566
2567static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
2568                                                    struct talitos_alg_template
2569                                                           *template)
2570{
2571        struct talitos_private *priv = dev_get_drvdata(dev);
2572        struct talitos_crypto_alg *t_alg;
2573        struct crypto_alg *alg;
2574
2575        t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL);
2576        if (!t_alg)
2577                return ERR_PTR(-ENOMEM);
2578
2579        t_alg->algt = *template;
2580
2581        switch (t_alg->algt.type) {
2582        case CRYPTO_ALG_TYPE_ABLKCIPHER:
2583                alg = &t_alg->algt.alg.crypto;
2584                alg->cra_init = talitos_cra_init;
2585                alg->cra_type = &crypto_ablkcipher_type;
2586                alg->cra_ablkcipher.setkey = ablkcipher_setkey;
2587                alg->cra_ablkcipher.encrypt = ablkcipher_encrypt;
2588                alg->cra_ablkcipher.decrypt = ablkcipher_decrypt;
2589                alg->cra_ablkcipher.geniv = "eseqiv";
2590                break;
2591        case CRYPTO_ALG_TYPE_AEAD:
2592                alg = &t_alg->algt.alg.crypto;
2593                alg->cra_init = talitos_cra_init_aead;
2594                alg->cra_type = &crypto_aead_type;
2595                alg->cra_aead.setkey = aead_setkey;
2596                alg->cra_aead.setauthsize = aead_setauthsize;
2597                alg->cra_aead.encrypt = aead_encrypt;
2598                alg->cra_aead.decrypt = aead_decrypt;
2599                alg->cra_aead.givencrypt = aead_givencrypt;
2600                alg->cra_aead.geniv = "<built-in>";
2601                break;
2602        case CRYPTO_ALG_TYPE_AHASH:
2603                alg = &t_alg->algt.alg.hash.halg.base;
2604                alg->cra_init = talitos_cra_init_ahash;
2605                alg->cra_type = &crypto_ahash_type;
2606                t_alg->algt.alg.hash.init = ahash_init;
2607                t_alg->algt.alg.hash.update = ahash_update;
2608                t_alg->algt.alg.hash.final = ahash_final;
2609                t_alg->algt.alg.hash.finup = ahash_finup;
2610                t_alg->algt.alg.hash.digest = ahash_digest;
2611                t_alg->algt.alg.hash.setkey = ahash_setkey;
2612
2613                if (!(priv->features & TALITOS_FTR_HMAC_OK) &&
2614                    !strncmp(alg->cra_name, "hmac", 4)) {
2615                        kfree(t_alg);
2616                        return ERR_PTR(-ENOTSUPP);
2617                }
2618                if (!(priv->features & TALITOS_FTR_SHA224_HWINIT) &&
2619                    (!strcmp(alg->cra_name, "sha224") ||
2620                     !strcmp(alg->cra_name, "hmac(sha224)"))) {
2621                        t_alg->algt.alg.hash.init = ahash_init_sha224_swinit;
2622                        t_alg->algt.desc_hdr_template =
2623                                        DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2624                                        DESC_HDR_SEL0_MDEUA |
2625                                        DESC_HDR_MODE0_MDEU_SHA256;
2626                }
2627                break;
2628        default:
2629                dev_err(dev, "unknown algorithm type %d\n", t_alg->algt.type);
2630                return ERR_PTR(-EINVAL);
2631        }
2632
2633        alg->cra_module = THIS_MODULE;
2634        alg->cra_priority = TALITOS_CRA_PRIORITY;
2635        alg->cra_alignmask = 0;
2636        alg->cra_ctxsize = sizeof(struct talitos_ctx);
2637        alg->cra_flags |= CRYPTO_ALG_KERN_DRIVER_ONLY;
2638
2639        t_alg->dev = dev;
2640
2641        return t_alg;
2642}
2643
2644static int talitos_probe_irq(struct platform_device *ofdev)
2645{
2646        struct device *dev = &ofdev->dev;
2647        struct device_node *np = ofdev->dev.of_node;
2648        struct talitos_private *priv = dev_get_drvdata(dev);
2649        int err;
2650
2651        priv->irq[0] = irq_of_parse_and_map(np, 0);
2652        if (!priv->irq[0]) {
2653                dev_err(dev, "failed to map irq\n");
2654                return -EINVAL;
2655        }
2656
2657        priv->irq[1] = irq_of_parse_and_map(np, 1);
2658
2659        /* get the primary irq line */
2660        if (!priv->irq[1]) {
2661                err = request_irq(priv->irq[0], talitos_interrupt_4ch, 0,
2662                                  dev_driver_string(dev), dev);
2663                goto primary_out;
2664        }
2665
2666        err = request_irq(priv->irq[0], talitos_interrupt_ch0_2, 0,
2667                          dev_driver_string(dev), dev);
2668        if (err)
2669                goto primary_out;
2670
2671        /* get the secondary irq line */
2672        err = request_irq(priv->irq[1], talitos_interrupt_ch1_3, 0,
2673                          dev_driver_string(dev), dev);
2674        if (err) {
2675                dev_err(dev, "failed to request secondary irq\n");
2676                irq_dispose_mapping(priv->irq[1]);
2677                priv->irq[1] = 0;
2678        }
2679
2680        return err;
2681
2682primary_out:
2683        if (err) {
2684                dev_err(dev, "failed to request primary irq\n");
2685                irq_dispose_mapping(priv->irq[0]);
2686                priv->irq[0] = 0;
2687        }
2688
2689        return err;
2690}
2691
2692static int talitos_probe(struct platform_device *ofdev)
2693{
2694        struct device *dev = &ofdev->dev;
2695        struct device_node *np = ofdev->dev.of_node;
2696        struct talitos_private *priv;
2697        const unsigned int *prop;
2698        int i, err;
2699
2700        priv = kzalloc(sizeof(struct talitos_private), GFP_KERNEL);
2701        if (!priv)
2702                return -ENOMEM;
2703
2704        dev_set_drvdata(dev, priv);
2705
2706        priv->ofdev = ofdev;
2707
2708        spin_lock_init(&priv->reg_lock);
2709
2710        err = talitos_probe_irq(ofdev);
2711        if (err)
2712                goto err_out;
2713
2714        if (!priv->irq[1]) {
2715                tasklet_init(&priv->done_task[0], talitos_done_4ch,
2716                             (unsigned long)dev);
2717        } else {
2718                tasklet_init(&priv->done_task[0], talitos_done_ch0_2,
2719                             (unsigned long)dev);
2720                tasklet_init(&priv->done_task[1], talitos_done_ch1_3,
2721                             (unsigned long)dev);
2722        }
2723
2724        INIT_LIST_HEAD(&priv->alg_list);
2725
2726        priv->reg = of_iomap(np, 0);
2727        if (!priv->reg) {
2728                dev_err(dev, "failed to of_iomap\n");
2729                err = -ENOMEM;
2730                goto err_out;
2731        }
2732
2733        /* get SEC version capabilities from device tree */
2734        prop = of_get_property(np, "fsl,num-channels", NULL);
2735        if (prop)
2736                priv->num_channels = *prop;
2737
2738        prop = of_get_property(np, "fsl,channel-fifo-len", NULL);
2739        if (prop)
2740                priv->chfifo_len = *prop;
2741
2742        prop = of_get_property(np, "fsl,exec-units-mask", NULL);
2743        if (prop)
2744                priv->exec_units = *prop;
2745
2746        prop = of_get_property(np, "fsl,descriptor-types-mask", NULL);
2747        if (prop)
2748                priv->desc_types = *prop;
2749
2750        if (!is_power_of_2(priv->num_channels) || !priv->chfifo_len ||
2751            !priv->exec_units || !priv->desc_types) {
2752                dev_err(dev, "invalid property data in device tree node\n");
2753                err = -EINVAL;
2754                goto err_out;
2755        }
2756
2757        if (of_device_is_compatible(np, "fsl,sec3.0"))
2758                priv->features |= TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT;
2759
2760        if (of_device_is_compatible(np, "fsl,sec2.1"))
2761                priv->features |= TALITOS_FTR_HW_AUTH_CHECK |
2762                                  TALITOS_FTR_SHA224_HWINIT |
2763                                  TALITOS_FTR_HMAC_OK;
2764
2765        priv->chan = kzalloc(sizeof(struct talitos_channel) *
2766                             priv->num_channels, GFP_KERNEL);
2767        if (!priv->chan) {
2768                dev_err(dev, "failed to allocate channel management space\n");
2769                err = -ENOMEM;
2770                goto err_out;
2771        }
2772
2773        for (i = 0; i < priv->num_channels; i++) {
2774                priv->chan[i].reg = priv->reg + TALITOS_CH_STRIDE * (i + 1);
2775                if (!priv->irq[1] || !(i & 1))
2776                        priv->chan[i].reg += TALITOS_CH_BASE_OFFSET;
2777        }
2778
2779        for (i = 0; i < priv->num_channels; i++) {
2780                spin_lock_init(&priv->chan[i].head_lock);
2781                spin_lock_init(&priv->chan[i].tail_lock);
2782        }
2783
2784        priv->fifo_len = roundup_pow_of_two(priv->chfifo_len);
2785
2786        for (i = 0; i < priv->num_channels; i++) {
2787                priv->chan[i].fifo = kzalloc(sizeof(struct talitos_request) *
2788                                             priv->fifo_len, GFP_KERNEL);
2789                if (!priv->chan[i].fifo) {
2790                        dev_err(dev, "failed to allocate request fifo %d\n", i);
2791                        err = -ENOMEM;
2792                        goto err_out;
2793                }
2794        }
2795
2796        for (i = 0; i < priv->num_channels; i++)
2797                atomic_set(&priv->chan[i].submit_count,
2798                           -(priv->chfifo_len - 1));
2799
2800        dma_set_mask(dev, DMA_BIT_MASK(36));
2801
2802        /* reset and initialize the h/w */
2803        err = init_device(dev);
2804        if (err) {
2805                dev_err(dev, "failed to initialize device\n");
2806                goto err_out;
2807        }
2808
2809        /* register the RNG, if available */
2810        if (hw_supports(dev, DESC_HDR_SEL0_RNG)) {
2811                err = talitos_register_rng(dev);
2812                if (err) {
2813                        dev_err(dev, "failed to register hwrng: %d\n", err);
2814                        goto err_out;
2815                } else
2816                        dev_info(dev, "hwrng\n");
2817        }
2818
2819        /* register crypto algorithms the device supports */
2820        for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
2821                if (hw_supports(dev, driver_algs[i].desc_hdr_template)) {
2822                        struct talitos_crypto_alg *t_alg;
2823                        char *name = NULL;
2824                        bool authenc = false;
2825
2826authencesn:
2827                        t_alg = talitos_alg_alloc(dev, &driver_algs[i]);
2828                        if (IS_ERR(t_alg)) {
2829                                err = PTR_ERR(t_alg);
2830                                if (err == -ENOTSUPP)
2831                                        continue;
2832                                goto err_out;
2833                        }
2834
2835                        switch (t_alg->algt.type) {
2836                        case CRYPTO_ALG_TYPE_ABLKCIPHER:
2837                        case CRYPTO_ALG_TYPE_AEAD:
2838                                err = crypto_register_alg(
2839                                                &t_alg->algt.alg.crypto);
2840                                name = t_alg->algt.alg.crypto.cra_driver_name;
2841                                authenc = authenc ? !authenc :
2842                                          !(bool)memcmp(name, "authenc", 7);
2843                                break;
2844                        case CRYPTO_ALG_TYPE_AHASH:
2845                                err = crypto_register_ahash(
2846                                                &t_alg->algt.alg.hash);
2847                                name =
2848                                 t_alg->algt.alg.hash.halg.base.cra_driver_name;
2849                                break;
2850                        }
2851                        if (err) {
2852                                dev_err(dev, "%s alg registration failed\n",
2853                                        name);
2854                                kfree(t_alg);
2855                        } else {
2856                                list_add_tail(&t_alg->entry, &priv->alg_list);
2857                                if (authenc) {
2858                                        struct crypto_alg *alg =
2859                                                &driver_algs[i].alg.crypto;
2860
2861                                        name = alg->cra_name;
2862                                        memmove(name + 10, name + 7,
2863                                                strlen(name) - 7);
2864                                        memcpy(name + 7, "esn", 3);
2865
2866                                        name = alg->cra_driver_name;
2867                                        memmove(name + 10, name + 7,
2868                                                strlen(name) - 7);
2869                                        memcpy(name + 7, "esn", 3);
2870
2871                                        goto authencesn;
2872                                }
2873                        }
2874                }
2875        }
2876        if (!list_empty(&priv->alg_list))
2877                dev_info(dev, "%s algorithms registered in /proc/crypto\n",
2878                         (char *)of_get_property(np, "compatible", NULL));
2879
2880        return 0;
2881
2882err_out:
2883        talitos_remove(ofdev);
2884
2885        return err;
2886}
2887
2888static const struct of_device_id talitos_match[] = {
2889        {
2890                .compatible = "fsl,sec2.0",
2891        },
2892        {},
2893};
2894MODULE_DEVICE_TABLE(of, talitos_match);
2895
2896static struct platform_driver talitos_driver = {
2897        .driver = {
2898                .name = "talitos",
2899                .owner = THIS_MODULE,
2900                .of_match_table = talitos_match,
2901        },
2902        .probe = talitos_probe,
2903        .remove = talitos_remove,
2904};
2905
2906module_platform_driver(talitos_driver);
2907
2908MODULE_LICENSE("GPL");
2909MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>");
2910MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver");
2911
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