drivers/crypto/amcc/crypto4xx_core.c

   1 /**
   2  * AMCC SoC PPC4xx Crypto Driver
   3  *
   4  * Copyright (c) 2008 Applied Micro Circuits Corporation.
   5  * All rights reserved. James Hsiao <jhsiao@amcc.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * This file implements AMCC crypto offload Linux device driver for use with
  18  * Linux CryptoAPI.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/spinlock_types.h>
  24 #include <linux/random.h>
  25 #include <linux/scatterlist.h>
  26 #include <linux/crypto.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/init.h>
  30 #include <linux/module.h>
  31 #include <linux/of_address.h>
  32 #include <linux/of_irq.h>
  33 #include <linux/of_platform.h>
  34 #include <linux/slab.h>
  35 #include <asm/dcr.h>
  36 #include <asm/dcr-regs.h>
  37 #include <asm/cacheflush.h>
  38 #include <crypto/aes.h>
  39 #include <crypto/sha.h>
  40 #include "crypto4xx_reg_def.h"
  41 #include "crypto4xx_core.h"
  42 #include "crypto4xx_sa.h"
  43
  44 #define PPC4XX_SEC_VERSION_STR                  "0.5"
  45
  46 /**
  47  * PPC4xx Crypto Engine Initialization Routine
  48  */
  49 static void crypto4xx_hw_init(struct crypto4xx_device *dev)
  50 {
  51         union ce_ring_size ring_size;
  52         union ce_ring_contol ring_ctrl;
  53         union ce_part_ring_size part_ring_size;
  54         union ce_io_threshold io_threshold;
  55         u32 rand_num;
  56         union ce_pe_dma_cfg pe_dma_cfg;
  57         u32 device_ctrl;
  58
  59         writel(PPC4XX_BYTE_ORDER, dev->ce_base + CRYPTO4XX_BYTE_ORDER_CFG);
  60         /* setup pe dma, include reset sg, pdr and pe, then release reset */
  61         pe_dma_cfg.w = 0;
  62         pe_dma_cfg.bf.bo_sgpd_en = 1;
  63         pe_dma_cfg.bf.bo_data_en = 0;
  64         pe_dma_cfg.bf.bo_sa_en = 1;
  65         pe_dma_cfg.bf.bo_pd_en = 1;
  66         pe_dma_cfg.bf.dynamic_sa_en = 1;
  67         pe_dma_cfg.bf.reset_sg = 1;
  68         pe_dma_cfg.bf.reset_pdr = 1;
  69         pe_dma_cfg.bf.reset_pe = 1;
  70         writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
  71         /* un reset pe,sg and pdr */
  72         pe_dma_cfg.bf.pe_mode = 0;
  73         pe_dma_cfg.bf.reset_sg = 0;
  74         pe_dma_cfg.bf.reset_pdr = 0;
  75         pe_dma_cfg.bf.reset_pe = 0;
  76         pe_dma_cfg.bf.bo_td_en = 0;
  77         writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
  78         writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_PDR_BASE);
  79         writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_RDR_BASE);
  80         writel(PPC4XX_PRNG_CTRL_AUTO_EN, dev->ce_base + CRYPTO4XX_PRNG_CTRL);
  81         get_random_bytes(&rand_num, sizeof(rand_num));
  82         writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_L);
  83         get_random_bytes(&rand_num, sizeof(rand_num));
  84         writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_H);
  85         ring_size.w = 0;
  86         ring_size.bf.ring_offset = PPC4XX_PD_SIZE;
  87         ring_size.bf.ring_size   = PPC4XX_NUM_PD;
  88         writel(ring_size.w, dev->ce_base + CRYPTO4XX_RING_SIZE);
  89         ring_ctrl.w = 0;
  90         writel(ring_ctrl.w, dev->ce_base + CRYPTO4XX_RING_CTRL);
  91         device_ctrl = readl(dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
  92         device_ctrl |= PPC4XX_DC_3DES_EN;
  93         writel(device_ctrl, dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
  94         writel(dev->gdr_pa, dev->ce_base + CRYPTO4XX_GATH_RING_BASE);
  95         writel(dev->sdr_pa, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE);
  96         part_ring_size.w = 0;
  97         part_ring_size.bf.sdr_size = PPC4XX_SDR_SIZE;
  98         part_ring_size.bf.gdr_size = PPC4XX_GDR_SIZE;
  99         writel(part_ring_size.w, dev->ce_base + CRYPTO4XX_PART_RING_SIZE);
 100         writel(PPC4XX_SD_BUFFER_SIZE, dev->ce_base + CRYPTO4XX_PART_RING_CFG);
 101         io_threshold.w = 0;
 102         io_threshold.bf.output_threshold = PPC4XX_OUTPUT_THRESHOLD;
 103         io_threshold.bf.input_threshold  = PPC4XX_INPUT_THRESHOLD;
 104         writel(io_threshold.w, dev->ce_base + CRYPTO4XX_IO_THRESHOLD);
 105         writel(0, dev->ce_base + CRYPTO4XX_PDR_BASE_UADDR);
 106         writel(0, dev->ce_base + CRYPTO4XX_RDR_BASE_UADDR);
 107         writel(0, dev->ce_base + CRYPTO4XX_PKT_SRC_UADDR);
 108         writel(0, dev->ce_base + CRYPTO4XX_PKT_DEST_UADDR);
 109         writel(0, dev->ce_base + CRYPTO4XX_SA_UADDR);
 110         writel(0, dev->ce_base + CRYPTO4XX_GATH_RING_BASE_UADDR);
 111         writel(0, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE_UADDR);
 112         /* un reset pe,sg and pdr */
 113         pe_dma_cfg.bf.pe_mode = 1;
 114         pe_dma_cfg.bf.reset_sg = 0;
 115         pe_dma_cfg.bf.reset_pdr = 0;
 116         pe_dma_cfg.bf.reset_pe = 0;
 117         pe_dma_cfg.bf.bo_td_en = 0;
 118         writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
 119         /*clear all pending interrupt*/
 120         writel(PPC4XX_INTERRUPT_CLR, dev->ce_base + CRYPTO4XX_INT_CLR);
 121         writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT);
 122         writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT);
 123         writel(PPC4XX_INT_CFG, dev->ce_base + CRYPTO4XX_INT_CFG);
 124         writel(PPC4XX_PD_DONE_INT, dev->ce_base + CRYPTO4XX_INT_EN);
 125 }
 126
 127 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size)
 128 {
 129         ctx->sa_in = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
 130                                         &ctx->sa_in_dma_addr, GFP_ATOMIC);
 131         if (ctx->sa_in == NULL)
 132                 return -ENOMEM;
 133
 134         ctx->sa_out = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
 135                                          &ctx->sa_out_dma_addr, GFP_ATOMIC);
 136         if (ctx->sa_out == NULL) {
 137                 dma_free_coherent(ctx->dev->core_dev->device,
 138                                   ctx->sa_len * 4,
 139                                   ctx->sa_in, ctx->sa_in_dma_addr);
 140                 return -ENOMEM;
 141         }
 142
 143         memset(ctx->sa_in, 0, size * 4);
 144         memset(ctx->sa_out, 0, size * 4);
 145         ctx->sa_len = size;
 146
 147         return 0;
 148 }
 149
 150 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx)
 151 {
 152         if (ctx->sa_in != NULL)
 153                 dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
 154                                   ctx->sa_in, ctx->sa_in_dma_addr);
 155         if (ctx->sa_out != NULL)
 156                 dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
 157                                   ctx->sa_out, ctx->sa_out_dma_addr);
 158
 159         ctx->sa_in_dma_addr = 0;
 160         ctx->sa_out_dma_addr = 0;
 161         ctx->sa_len = 0;
 162 }
 163
 164 u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx)
 165 {
 166         ctx->state_record = dma_alloc_coherent(ctx->dev->core_dev->device,
 167                                 sizeof(struct sa_state_record),
 168                                 &ctx->state_record_dma_addr, GFP_ATOMIC);
 169         if (!ctx->state_record_dma_addr)
 170                 return -ENOMEM;
 171         memset(ctx->state_record, 0, sizeof(struct sa_state_record));
 172
 173         return 0;
 174 }
 175
 176 void crypto4xx_free_state_record(struct crypto4xx_ctx *ctx)
 177 {
 178         if (ctx->state_record != NULL)
 179                 dma_free_coherent(ctx->dev->core_dev->device,
 180                                   sizeof(struct sa_state_record),
 181                                   ctx->state_record,
 182                                   ctx->state_record_dma_addr);
 183         ctx->state_record_dma_addr = 0;
 184 }
 185
 186 /**
 187  * alloc memory for the gather ring
 188  * no need to alloc buf for the ring
 189  * gdr_tail, gdr_head and gdr_count are initialized by this function
 190  */
 191 static u32 crypto4xx_build_pdr(struct crypto4xx_device *dev)
 192 {
 193         int i;
 194         struct pd_uinfo *pd_uinfo;
 195         dev->pdr = dma_alloc_coherent(dev->core_dev->device,
 196                                       sizeof(struct ce_pd) * PPC4XX_NUM_PD,
 197                                       &dev->pdr_pa, GFP_ATOMIC);
 198         if (!dev->pdr)
 199                 return -ENOMEM;
 200
 201         dev->pdr_uinfo = kzalloc(sizeof(struct pd_uinfo) * PPC4XX_NUM_PD,
 202                                 GFP_KERNEL);
 203         if (!dev->pdr_uinfo) {
 204                 dma_free_coherent(dev->core_dev->device,
 205                                   sizeof(struct ce_pd) * PPC4XX_NUM_PD,
 206                                   dev->pdr,
 207                                   dev->pdr_pa);
 208                 return -ENOMEM;
 209         }
 210         memset(dev->pdr, 0,  sizeof(struct ce_pd) * PPC4XX_NUM_PD);
 211         dev->shadow_sa_pool = dma_alloc_coherent(dev->core_dev->device,
 212                                    256 * PPC4XX_NUM_PD,
 213                                    &dev->shadow_sa_pool_pa,
 214                                    GFP_ATOMIC);
 215         if (!dev->shadow_sa_pool)
 216                 return -ENOMEM;
 217
 218         dev->shadow_sr_pool = dma_alloc_coherent(dev->core_dev->device,
 219                          sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
 220                          &dev->shadow_sr_pool_pa, GFP_ATOMIC);
 221         if (!dev->shadow_sr_pool)
 222                 return -ENOMEM;
 223         for (i = 0; i < PPC4XX_NUM_PD; i++) {
 224                 pd_uinfo = (struct pd_uinfo *) (dev->pdr_uinfo +
 225                                                 sizeof(struct pd_uinfo) * i);
 226
 227                 /* alloc 256 bytes which is enough for any kind of dynamic sa */
 228                 pd_uinfo->sa_va = dev->shadow_sa_pool + 256 * i;
 229                 pd_uinfo->sa_pa = dev->shadow_sa_pool_pa + 256 * i;
 230
 231                 /* alloc state record */
 232                 pd_uinfo->sr_va = dev->shadow_sr_pool +
 233                     sizeof(struct sa_state_record) * i;
 234                 pd_uinfo->sr_pa = dev->shadow_sr_pool_pa +
 235                     sizeof(struct sa_state_record) * i;
 236         }
 237
 238         return 0;
 239 }
 240
 241 static void crypto4xx_destroy_pdr(struct crypto4xx_device *dev)
 242 {
 243         if (dev->pdr != NULL)
 244                 dma_free_coherent(dev->core_dev->device,
 245                                   sizeof(struct ce_pd) * PPC4XX_NUM_PD,
 246                                   dev->pdr, dev->pdr_pa);
 247         if (dev->shadow_sa_pool)
 248                 dma_free_coherent(dev->core_dev->device, 256 * PPC4XX_NUM_PD,
 249                                   dev->shadow_sa_pool, dev->shadow_sa_pool_pa);
 250         if (dev->shadow_sr_pool)
 251                 dma_free_coherent(dev->core_dev->device,
 252                         sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
 253                         dev->shadow_sr_pool, dev->shadow_sr_pool_pa);
 254
 255         kfree(dev->pdr_uinfo);
 256 }
 257
 258 static u32 crypto4xx_get_pd_from_pdr_nolock(struct crypto4xx_device *dev)
 259 {
 260         u32 retval;
 261         u32 tmp;
 262
 263         retval = dev->pdr_head;
 264         tmp = (dev->pdr_head + 1) % PPC4XX_NUM_PD;
 265
 266         if (tmp == dev->pdr_tail)
 267                 return ERING_WAS_FULL;
 268
 269         dev->pdr_head = tmp;
 270
 271         return retval;
 272 }
 273
 274 static u32 crypto4xx_put_pd_to_pdr(struct crypto4xx_device *dev, u32 idx)
 275 {
 276         struct pd_uinfo *pd_uinfo;
 277         unsigned long flags;
 278
 279         pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo +
 280                                        sizeof(struct pd_uinfo) * idx);
 281         spin_lock_irqsave(&dev->core_dev->lock, flags);
 282         if (dev->pdr_tail != PPC4XX_LAST_PD)
 283                 dev->pdr_tail++;
 284         else
 285                 dev->pdr_tail = 0;
 286         pd_uinfo->state = PD_ENTRY_FREE;
 287         spin_unlock_irqrestore(&dev->core_dev->lock, flags);
 288
 289         return 0;
 290 }
 291
 292 static struct ce_pd *crypto4xx_get_pdp(struct crypto4xx_device *dev,
 293                                        dma_addr_t *pd_dma, u32 idx)
 294 {
 295         *pd_dma = dev->pdr_pa + sizeof(struct ce_pd) * idx;
 296
 297         return dev->pdr + sizeof(struct ce_pd) * idx;
 298 }
 299
 300 /**
 301  * alloc memory for the gather ring
 302  * no need to alloc buf for the ring
 303  * gdr_tail, gdr_head and gdr_count are initialized by this function
 304  */
 305 static u32 crypto4xx_build_gdr(struct crypto4xx_device *dev)
 306 {
 307         dev->gdr = dma_alloc_coherent(dev->core_dev->device,
 308                                       sizeof(struct ce_gd) * PPC4XX_NUM_GD,
 309                                       &dev->gdr_pa, GFP_ATOMIC);
 310         if (!dev->gdr)
 311                 return -ENOMEM;
 312
 313         memset(dev->gdr, 0, sizeof(struct ce_gd) * PPC4XX_NUM_GD);
 314
 315         return 0;
 316 }
 317
 318 static inline void crypto4xx_destroy_gdr(struct crypto4xx_device *dev)
 319 {
 320         dma_free_coherent(dev->core_dev->device,
 321                           sizeof(struct ce_gd) * PPC4XX_NUM_GD,
 322                           dev->gdr, dev->gdr_pa);
 323 }
 324
 325 /*
 326  * when this function is called.
 327  * preemption or interrupt must be disabled
 328  */
 329 u32 crypto4xx_get_n_gd(struct crypto4xx_device *dev, int n)
 330 {
 331         u32 retval;
 332         u32 tmp;
 333         if (n >= PPC4XX_NUM_GD)
 334                 return ERING_WAS_FULL;
 335
 336         retval = dev->gdr_head;
 337         tmp = (dev->gdr_head + n) % PPC4XX_NUM_GD;
 338         if (dev->gdr_head > dev->gdr_tail) {
 339                 if (tmp < dev->gdr_head && tmp >= dev->gdr_tail)
 340                         return ERING_WAS_FULL;
 341         } else if (dev->gdr_head < dev->gdr_tail) {
 342                 if (tmp < dev->gdr_head || tmp >= dev->gdr_tail)
 343                         return ERING_WAS_FULL;
 344         }
 345         dev->gdr_head = tmp;
 346
 347         return retval;
 348 }
 349
 350 static u32 crypto4xx_put_gd_to_gdr(struct crypto4xx_device *dev)
 351 {
 352         unsigned long flags;
 353
 354         spin_lock_irqsave(&dev->core_dev->lock, flags);
 355         if (dev->gdr_tail == dev->gdr_head) {
 356                 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
 357                 return 0;
 358         }
 359
 360         if (dev->gdr_tail != PPC4XX_LAST_GD)
 361                 dev->gdr_tail++;
 362         else
 363                 dev->gdr_tail = 0;
 364
 365         spin_unlock_irqrestore(&dev->core_dev->lock, flags);
 366
 367         return 0;
 368 }
 369
 370 static inline struct ce_gd *crypto4xx_get_gdp(struct crypto4xx_device *dev,
 371                                               dma_addr_t *gd_dma, u32 idx)
 372 {
 373         *gd_dma = dev->gdr_pa + sizeof(struct ce_gd) * idx;
 374
 375         return (struct ce_gd *) (dev->gdr + sizeof(struct ce_gd) * idx);
 376 }
 377
 378 /**
 379  * alloc memory for the scatter ring
 380  * need to alloc buf for the ring
 381  * sdr_tail, sdr_head and sdr_count are initialized by this function
 382  */
 383 static u32 crypto4xx_build_sdr(struct crypto4xx_device *dev)
 384 {
 385         int i;
 386         struct ce_sd *sd_array;
 387
 388         /* alloc memory for scatter descriptor ring */
 389         dev->sdr = dma_alloc_coherent(dev->core_dev->device,
 390                                       sizeof(struct ce_sd) * PPC4XX_NUM_SD,
 391                                       &dev->sdr_pa, GFP_ATOMIC);
 392         if (!dev->sdr)
 393                 return -ENOMEM;
 394
 395         dev->scatter_buffer_size = PPC4XX_SD_BUFFER_SIZE;
 396         dev->scatter_buffer_va =
 397                 dma_alloc_coherent(dev->core_dev->device,
 398                         dev->scatter_buffer_size * PPC4XX_NUM_SD,
 399                         &dev->scatter_buffer_pa, GFP_ATOMIC);
 400         if (!dev->scatter_buffer_va) {
 401                 dma_free_coherent(dev->core_dev->device,
 402                                   sizeof(struct ce_sd) * PPC4XX_NUM_SD,
 403                                   dev->sdr, dev->sdr_pa);
 404                 return -ENOMEM;
 405         }
 406
 407         sd_array = dev->sdr;
 408
 409         for (i = 0; i < PPC4XX_NUM_SD; i++) {
 410                 sd_array[i].ptr = dev->scatter_buffer_pa +
 411                                   dev->scatter_buffer_size * i;
 412         }
 413
 414         return 0;
 415 }
 416
 417 static void crypto4xx_destroy_sdr(struct crypto4xx_device *dev)
 418 {
 419         if (dev->sdr != NULL)
 420                 dma_free_coherent(dev->core_dev->device,
 421                                   sizeof(struct ce_sd) * PPC4XX_NUM_SD,
 422                                   dev->sdr, dev->sdr_pa);
 423
 424         if (dev->scatter_buffer_va != NULL)
 425                 dma_free_coherent(dev->core_dev->device,
 426                                   dev->scatter_buffer_size * PPC4XX_NUM_SD,
 427                                   dev->scatter_buffer_va,
 428                                   dev->scatter_buffer_pa);
 429 }
 430
 431 /*
 432  * when this function is called.
 433  * preemption or interrupt must be disabled
 434  */
 435 static u32 crypto4xx_get_n_sd(struct crypto4xx_device *dev, int n)
 436 {
 437         u32 retval;
 438         u32 tmp;
 439
 440         if (n >= PPC4XX_NUM_SD)
 441                 return ERING_WAS_FULL;
 442
 443         retval = dev->sdr_head;
 444         tmp = (dev->sdr_head + n) % PPC4XX_NUM_SD;
 445         if (dev->sdr_head > dev->gdr_tail) {
 446                 if (tmp < dev->sdr_head && tmp >= dev->sdr_tail)
 447                         return ERING_WAS_FULL;
 448         } else if (dev->sdr_head < dev->sdr_tail) {
 449                 if (tmp < dev->sdr_head || tmp >= dev->sdr_tail)
 450                         return ERING_WAS_FULL;
 451         } /* the head = tail, or empty case is already take cared */
 452         dev->sdr_head = tmp;
 453
 454         return retval;
 455 }
 456
 457 static u32 crypto4xx_put_sd_to_sdr(struct crypto4xx_device *dev)
 458 {
 459         unsigned long flags;
 460
 461         spin_lock_irqsave(&dev->core_dev->lock, flags);
 462         if (dev->sdr_tail == dev->sdr_head) {
 463                 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
 464                 return 0;
 465         }
 466         if (dev->sdr_tail != PPC4XX_LAST_SD)
 467                 dev->sdr_tail++;
 468         else
 469                 dev->sdr_tail = 0;
 470         spin_unlock_irqrestore(&dev->core_dev->lock, flags);
 471
 472         return 0;
 473 }
 474
 475 static inline struct ce_sd *crypto4xx_get_sdp(struct crypto4xx_device *dev,
 476                                               dma_addr_t *sd_dma, u32 idx)
 477 {
 478         *sd_dma = dev->sdr_pa + sizeof(struct ce_sd) * idx;
 479
 480         return  (struct ce_sd *)(dev->sdr + sizeof(struct ce_sd) * idx);
 481 }
 482
 483 static u32 crypto4xx_fill_one_page(struct crypto4xx_device *dev,
 484                                    dma_addr_t *addr, u32 *length,
 485                                    u32 *idx, u32 *offset, u32 *nbytes)
 486 {
 487         u32 len;
 488
 489         if (*length > dev->scatter_buffer_size) {
 490                 memcpy(phys_to_virt(*addr),
 491                         dev->scatter_buffer_va +
 492                         *idx * dev->scatter_buffer_size + *offset,
 493                         dev->scatter_buffer_size);
 494                 *offset = 0;
 495                 *length -= dev->scatter_buffer_size;
 496                 *nbytes -= dev->scatter_buffer_size;
 497                 if (*idx == PPC4XX_LAST_SD)
 498                         *idx = 0;
 499                 else
 500                         (*idx)++;
 501                 *addr = *addr +  dev->scatter_buffer_size;
 502                 return 1;
 503         } else if (*length < dev->scatter_buffer_size) {
 504                 memcpy(phys_to_virt(*addr),
 505                         dev->scatter_buffer_va +
 506                         *idx * dev->scatter_buffer_size + *offset, *length);
 507                 if ((*offset + *length) == dev->scatter_buffer_size) {
 508                         if (*idx == PPC4XX_LAST_SD)
 509                                 *idx = 0;
 510                         else
 511                                 (*idx)++;
 512                         *nbytes -= *length;
 513                         *offset = 0;
 514                 } else {
 515                         *nbytes -= *length;
 516                         *offset += *length;
 517                 }
 518
 519                 return 0;
 520         } else {
 521                 len = (*nbytes <= dev->scatter_buffer_size) ?
 522                                 (*nbytes) : dev->scatter_buffer_size;
 523                 memcpy(phys_to_virt(*addr),
 524                         dev->scatter_buffer_va +
 525                         *idx * dev->scatter_buffer_size + *offset,
 526                         len);
 527                 *offset = 0;
 528                 *nbytes -= len;
 529
 530                 if (*idx == PPC4XX_LAST_SD)
 531                         *idx = 0;
 532                 else
 533                         (*idx)++;
 534
 535                 return 0;
 536     }
 537 }
 538
 539 static void crypto4xx_copy_pkt_to_dst(struct crypto4xx_device *dev,
 540                                       struct ce_pd *pd,
 541                                       struct pd_uinfo *pd_uinfo,
 542                                       u32 nbytes,
 543                                       struct scatterlist *dst)
 544 {
 545         dma_addr_t addr;
 546         u32 this_sd;
 547         u32 offset;
 548         u32 len;
 549         u32 i;
 550         u32 sg_len;
 551         struct scatterlist *sg;
 552
 553         this_sd = pd_uinfo->first_sd;
 554         offset = 0;
 555         i = 0;
 556
 557         while (nbytes) {
 558                 sg = &dst[i];
 559                 sg_len = sg->length;
 560                 addr = dma_map_page(dev->core_dev->device, sg_page(sg),
 561                                 sg->offset, sg->length, DMA_TO_DEVICE);
 562
 563                 if (offset == 0) {
 564                         len = (nbytes <= sg->length) ? nbytes : sg->length;
 565                         while (crypto4xx_fill_one_page(dev, &addr, &len,
 566                                 &this_sd, &offset, &nbytes))
 567                                 ;
 568                         if (!nbytes)
 569                                 return;
 570                         i++;
 571                 } else {
 572                         len = (nbytes <= (dev->scatter_buffer_size - offset)) ?
 573                                 nbytes : (dev->scatter_buffer_size - offset);
 574                         len = (sg->length < len) ? sg->length : len;
 575                         while (crypto4xx_fill_one_page(dev, &addr, &len,
 576                                                &this_sd, &offset, &nbytes))
 577                                 ;
 578                         if (!nbytes)
 579                                 return;
 580                         sg_len -= len;
 581                         if (sg_len) {
 582                                 addr += len;
 583                                 while (crypto4xx_fill_one_page(dev, &addr,
 584                                         &sg_len, &this_sd, &offset, &nbytes))
 585                                         ;
 586                         }
 587                         i++;
 588                 }
 589         }
 590 }
 591
 592 static u32 crypto4xx_copy_digest_to_dst(struct pd_uinfo *pd_uinfo,
 593                                         struct crypto4xx_ctx *ctx)
 594 {
 595         struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *) ctx->sa_in;
 596         struct sa_state_record *state_record =
 597                                 (struct sa_state_record *) pd_uinfo->sr_va;
 598
 599         if (sa->sa_command_0.bf.hash_alg == SA_HASH_ALG_SHA1) {
 600                 memcpy((void *) pd_uinfo->dest_va, state_record->save_digest,
 601                        SA_HASH_ALG_SHA1_DIGEST_SIZE);
 602         }
 603
 604         return 0;
 605 }
 606
 607 static void crypto4xx_ret_sg_desc(struct crypto4xx_device *dev,
 608                                   struct pd_uinfo *pd_uinfo)
 609 {
 610         int i;
 611         if (pd_uinfo->num_gd) {
 612                 for (i = 0; i < pd_uinfo->num_gd; i++)
 613                         crypto4xx_put_gd_to_gdr(dev);
 614                 pd_uinfo->first_gd = 0xffffffff;
 615                 pd_uinfo->num_gd = 0;
 616         }
 617         if (pd_uinfo->num_sd) {
 618                 for (i = 0; i < pd_uinfo->num_sd; i++)
 619                         crypto4xx_put_sd_to_sdr(dev);
 620
 621                 pd_uinfo->first_sd = 0xffffffff;
 622                 pd_uinfo->num_sd = 0;
 623         }
 624 }
 625
 626 static u32 crypto4xx_ablkcipher_done(struct crypto4xx_device *dev,
 627                                      struct pd_uinfo *pd_uinfo,
 628                                      struct ce_pd *pd)
 629 {
 630         struct crypto4xx_ctx *ctx;
 631         struct ablkcipher_request *ablk_req;
 632         struct scatterlist *dst;
 633         dma_addr_t addr;
 634
 635         ablk_req = ablkcipher_request_cast(pd_uinfo->async_req);
 636         ctx  = crypto_tfm_ctx(ablk_req->base.tfm);
 637
 638         if (pd_uinfo->using_sd) {
 639                 crypto4xx_copy_pkt_to_dst(dev, pd, pd_uinfo, ablk_req->nbytes,
 640                                           ablk_req->dst);
 641         } else {
 642                 dst = pd_uinfo->dest_va;
 643                 addr = dma_map_page(dev->core_dev->device, sg_page(dst),
 644                                     dst->offset, dst->length, DMA_FROM_DEVICE);
 645         }
 646         crypto4xx_ret_sg_desc(dev, pd_uinfo);
 647         if (ablk_req->base.complete != NULL)
 648                 ablk_req->base.complete(&ablk_req->base, 0);
 649
 650         return 0;
 651 }
 652
 653 static u32 crypto4xx_ahash_done(struct crypto4xx_device *dev,
 654                                 struct pd_uinfo *pd_uinfo)
 655 {
 656         struct crypto4xx_ctx *ctx;
 657         struct ahash_request *ahash_req;
 658
 659         ahash_req = ahash_request_cast(pd_uinfo->async_req);
 660         ctx  = crypto_tfm_ctx(ahash_req->base.tfm);
 661
 662         crypto4xx_copy_digest_to_dst(pd_uinfo,
 663                                      crypto_tfm_ctx(ahash_req->base.tfm));
 664         crypto4xx_ret_sg_desc(dev, pd_uinfo);
 665         /* call user provided callback function x */
 666         if (ahash_req->base.complete != NULL)
 667                 ahash_req->base.complete(&ahash_req->base, 0);
 668
 669         return 0;
 670 }
 671
 672 static u32 crypto4xx_pd_done(struct crypto4xx_device *dev, u32 idx)
 673 {
 674         struct ce_pd *pd;
 675         struct pd_uinfo *pd_uinfo;
 676
 677         pd =  dev->pdr + sizeof(struct ce_pd)*idx;
 678         pd_uinfo = dev->pdr_uinfo + sizeof(struct pd_uinfo)*idx;
 679         if (crypto_tfm_alg_type(pd_uinfo->async_req->tfm) ==
 680                         CRYPTO_ALG_TYPE_ABLKCIPHER)
 681                 return crypto4xx_ablkcipher_done(dev, pd_uinfo, pd);
 682         else
 683                 return crypto4xx_ahash_done(dev, pd_uinfo);
 684 }
 685
 686 /**
 687  * Note: Only use this function to copy items that is word aligned.
 688  */
 689 void crypto4xx_memcpy_le(unsigned int *dst,
 690                          const unsigned char *buf,
 691                          int len)
 692 {
 693         u8 *tmp;
 694         for (; len >= 4; buf += 4, len -= 4)
 695                 *dst++ = cpu_to_le32(*(unsigned int *) buf);
 696
 697         tmp = (u8 *)dst;
 698         switch (len) {
 699         case 3:
 700                 *tmp++ = 0;
 701                 *tmp++ = *(buf+2);
 702                 *tmp++ = *(buf+1);
 703                 *tmp++ = *buf;
 704                 break;
 705         case 2:
 706                 *tmp++ = 0;
 707                 *tmp++ = 0;
 708                 *tmp++ = *(buf+1);
 709                 *tmp++ = *buf;
 710                 break;
 711         case 1:
 712                 *tmp++ = 0;
 713                 *tmp++ = 0;
 714                 *tmp++ = 0;
 715                 *tmp++ = *buf;
 716                 break;
 717         default:
 718                 break;
 719         }
 720 }
 721
 722 static void crypto4xx_stop_all(struct crypto4xx_core_device *core_dev)
 723 {
 724         crypto4xx_destroy_pdr(core_dev->dev);
 725         crypto4xx_destroy_gdr(core_dev->dev);
 726         crypto4xx_destroy_sdr(core_dev->dev);
 727         dev_set_drvdata(core_dev->device, NULL);
 728         iounmap(core_dev->dev->ce_base);
 729         kfree(core_dev->dev);
 730         kfree(core_dev);
 731 }
 732
 733 void crypto4xx_return_pd(struct crypto4xx_device *dev,
 734                          u32 pd_entry, struct ce_pd *pd,
 735                          struct pd_uinfo *pd_uinfo)
 736 {
 737         /* irq should be already disabled */
 738         dev->pdr_head = pd_entry;
 739         pd->pd_ctl.w = 0;
 740         pd->pd_ctl_len.w = 0;
 741         pd_uinfo->state = PD_ENTRY_FREE;
 742 }
 743
 744 /*
 745  * derive number of elements in scatterlist
 746  * Shamlessly copy from talitos.c
 747  */
 748 static int get_sg_count(struct scatterlist *sg_list, int nbytes)
 749 {
 750         struct scatterlist *sg = sg_list;
 751         int sg_nents = 0;
 752
 753         while (nbytes) {
 754                 sg_nents++;
 755                 if (sg->length > nbytes)
 756                         break;
 757                 nbytes -= sg->length;
 758                 sg = sg_next(sg);
 759         }
 760
 761         return sg_nents;
 762 }
 763
 764 static u32 get_next_gd(u32 current)
 765 {
 766         if (current != PPC4XX_LAST_GD)
 767                 return current + 1;
 768         else
 769                 return 0;
 770 }
 771
 772 static u32 get_next_sd(u32 current)
 773 {
 774         if (current != PPC4XX_LAST_SD)
 775                 return current + 1;
 776         else
 777                 return 0;
 778 }
 779
 780 u32 crypto4xx_build_pd(struct crypto_async_request *req,
 781                        struct crypto4xx_ctx *ctx,
 782                        struct scatterlist *src,
 783                        struct scatterlist *dst,
 784                        unsigned int datalen,
 785                        void *iv, u32 iv_len)
 786 {
 787         struct crypto4xx_device *dev = ctx->dev;
 788         dma_addr_t addr, pd_dma, sd_dma, gd_dma;
 789         struct dynamic_sa_ctl *sa;
 790         struct scatterlist *sg;
 791         struct ce_gd *gd;
 792         struct ce_pd *pd;
 793         u32 num_gd, num_sd;
 794         u32 fst_gd = 0xffffffff;
 795         u32 fst_sd = 0xffffffff;
 796         u32 pd_entry;
 797         unsigned long flags;
 798         struct pd_uinfo *pd_uinfo = NULL;
 799         unsigned int nbytes = datalen, idx;
 800         unsigned int ivlen = 0;
 801         u32 gd_idx = 0;
 802
 803         /* figure how many gd is needed */
 804         num_gd = get_sg_count(src, datalen);
 805         if (num_gd == 1)
 806                 num_gd = 0;
 807
 808         /* figure how many sd is needed */
 809         if (sg_is_last(dst) || ctx->is_hash) {
 810                 num_sd = 0;
 811         } else {
 812                 if (datalen > PPC4XX_SD_BUFFER_SIZE) {
 813                         num_sd = datalen / PPC4XX_SD_BUFFER_SIZE;
 814                         if (datalen % PPC4XX_SD_BUFFER_SIZE)
 815                                 num_sd++;
 816                 } else {
 817                         num_sd = 1;
 818                 }
 819         }
 820
 821         /*
 822          * The follow section of code needs to be protected
 823          * The gather ring and scatter ring needs to be consecutive
 824          * In case of run out of any kind of descriptor, the descriptor
 825          * already got must be return the original place.
 826          */
 827         spin_lock_irqsave(&dev->core_dev->lock, flags);
 828         if (num_gd) {
 829                 fst_gd = crypto4xx_get_n_gd(dev, num_gd);
 830                 if (fst_gd == ERING_WAS_FULL) {
 831                         spin_unlock_irqrestore(&dev->core_dev->lock, flags);
 832                         return -EAGAIN;
 833                 }
 834         }
 835         if (num_sd) {
 836                 fst_sd = crypto4xx_get_n_sd(dev, num_sd);
 837                 if (fst_sd == ERING_WAS_FULL) {
 838                         if (num_gd)
 839                                 dev->gdr_head = fst_gd;
 840                         spin_unlock_irqrestore(&dev->core_dev->lock, flags);
 841                         return -EAGAIN;
 842                 }
 843         }
 844         pd_entry = crypto4xx_get_pd_from_pdr_nolock(dev);
 845         if (pd_entry == ERING_WAS_FULL) {
 846                 if (num_gd)
 847                         dev->gdr_head = fst_gd;
 848                 if (num_sd)
 849                         dev->sdr_head = fst_sd;
 850                 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
 851                 return -EAGAIN;
 852         }
 853         spin_unlock_irqrestore(&dev->core_dev->lock, flags);
 854
 855         pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo +
 856                                        sizeof(struct pd_uinfo) * pd_entry);
 857         pd = crypto4xx_get_pdp(dev, &pd_dma, pd_entry);
 858         pd_uinfo->async_req = req;
 859         pd_uinfo->num_gd = num_gd;
 860         pd_uinfo->num_sd = num_sd;
 861
 862         if (iv_len || ctx->is_hash) {
 863                 ivlen = iv_len;
 864                 pd->sa = pd_uinfo->sa_pa;
 865                 sa = (struct dynamic_sa_ctl *) pd_uinfo->sa_va;
 866                 if (ctx->direction == DIR_INBOUND)
 867                         memcpy(sa, ctx->sa_in, ctx->sa_len * 4);
 868                 else
 869                         memcpy(sa, ctx->sa_out, ctx->sa_len * 4);
 870
 871                 memcpy((void *) sa + ctx->offset_to_sr_ptr,
 872                         &pd_uinfo->sr_pa, 4);
 873
 874                 if (iv_len)
 875                         crypto4xx_memcpy_le(pd_uinfo->sr_va, iv, iv_len);
 876         } else {
 877                 if (ctx->direction == DIR_INBOUND) {
 878                         pd->sa = ctx->sa_in_dma_addr;
 879                         sa = (struct dynamic_sa_ctl *) ctx->sa_in;
 880                 } else {
 881                         pd->sa = ctx->sa_out_dma_addr;
 882                         sa = (struct dynamic_sa_ctl *) ctx->sa_out;
 883                 }
 884         }
 885         pd->sa_len = ctx->sa_len;
 886         if (num_gd) {
 887                 /* get first gd we are going to use */
 888                 gd_idx = fst_gd;
 889                 pd_uinfo->first_gd = fst_gd;
 890                 pd_uinfo->num_gd = num_gd;
 891                 gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx);
 892                 pd->src = gd_dma;
 893                 /* enable gather */
 894                 sa->sa_command_0.bf.gather = 1;
 895                 idx = 0;
 896                 src = &src[0];
 897                 /* walk the sg, and setup gather array */
 898                 while (nbytes) {
 899                         sg = &src[idx];
 900                         addr = dma_map_page(dev->core_dev->device, sg_page(sg),
 901                                     sg->offset, sg->length, DMA_TO_DEVICE);
 902                         gd->ptr = addr;
 903                         gd->ctl_len.len = sg->length;
 904                         gd->ctl_len.done = 0;
 905                         gd->ctl_len.ready = 1;
 906                         if (sg->length >= nbytes)
 907                                 break;
 908                         nbytes -= sg->length;
 909                         gd_idx = get_next_gd(gd_idx);
 910                         gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx);
 911                         idx++;
 912                 }
 913         } else {
 914                 pd->src = (u32)dma_map_page(dev->core_dev->device, sg_page(src),
 915                                 src->offset, src->length, DMA_TO_DEVICE);
 916                 /*
 917                  * Disable gather in sa command
 918                  */
 919                 sa->sa_command_0.bf.gather = 0;
 920                 /*
 921                  * Indicate gather array is not used
 922                  */
 923                 pd_uinfo->first_gd = 0xffffffff;
 924                 pd_uinfo->num_gd = 0;
 925         }
 926         if (ctx->is_hash || sg_is_last(dst)) {
 927                 /*
 928                  * we know application give us dst a whole piece of memory
 929                  * no need to use scatter ring.
 930                  * In case of is_hash, the icv is always at end of src data.
 931                  */
 932                 pd_uinfo->using_sd = 0;
 933                 pd_uinfo->first_sd = 0xffffffff;
 934                 pd_uinfo->num_sd = 0;
 935                 pd_uinfo->dest_va = dst;
 936                 sa->sa_command_0.bf.scatter = 0;
 937                 if (ctx->is_hash)
 938                         pd->dest = virt_to_phys((void *)dst);
 939                 else
 940                         pd->dest = (u32)dma_map_page(dev->core_dev->device,
 941                                         sg_page(dst), dst->offset,
 942                                         dst->length, DMA_TO_DEVICE);
 943         } else {
 944                 struct ce_sd *sd = NULL;
 945                 u32 sd_idx = fst_sd;
 946                 nbytes = datalen;
 947                 sa->sa_command_0.bf.scatter = 1;
 948                 pd_uinfo->using_sd = 1;
 949                 pd_uinfo->dest_va = dst;
 950                 pd_uinfo->first_sd = fst_sd;
 951                 pd_uinfo->num_sd = num_sd;
 952                 sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx);
 953                 pd->dest = sd_dma;
 954                 /* setup scatter descriptor */
 955                 sd->ctl.done = 0;
 956                 sd->ctl.rdy = 1;
 957                 /* sd->ptr should be setup by sd_init routine*/
 958                 idx = 0;
 959                 if (nbytes >= PPC4XX_SD_BUFFER_SIZE)
 960                         nbytes -= PPC4XX_SD_BUFFER_SIZE;
 961                 else
 962                         nbytes = 0;
 963                 while (nbytes) {
 964                         sd_idx = get_next_sd(sd_idx);
 965                         sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx);
 966                         /* setup scatter descriptor */
 967                         sd->ctl.done = 0;
 968                         sd->ctl.rdy = 1;
 969                         if (nbytes >= PPC4XX_SD_BUFFER_SIZE)
 970                                 nbytes -= PPC4XX_SD_BUFFER_SIZE;
 971                         else
 972                                 /*
 973                                  * SD entry can hold PPC4XX_SD_BUFFER_SIZE,
 974                                  * which is more than nbytes, so done.
 975                                  */
 976                                 nbytes = 0;
 977                 }
 978         }
 979
 980         sa->sa_command_1.bf.hash_crypto_offset = 0;
 981         pd->pd_ctl.w = ctx->pd_ctl;
 982         pd->pd_ctl_len.w = 0x00400000 | (ctx->bypass << 24) | datalen;
 983         pd_uinfo->state = PD_ENTRY_INUSE;
 984         wmb();
 985         /* write any value to push engine to read a pd */
 986         writel(1, dev->ce_base + CRYPTO4XX_INT_DESCR_RD);
 987         return -EINPROGRESS;
 988 }
 989
 990 /**
 991  * Algorithm Registration Functions
 992  */
 993 static int crypto4xx_alg_init(struct crypto_tfm *tfm)
 994 {
 995         struct crypto_alg *alg = tfm->__crt_alg;
 996         struct crypto4xx_alg *amcc_alg = crypto_alg_to_crypto4xx_alg(alg);
 997         struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
 998
 999         ctx->dev = amcc_alg->dev;
1000         ctx->sa_in = NULL;
1001         ctx->sa_out = NULL;
1002         ctx->sa_in_dma_addr = 0;
1003         ctx->sa_out_dma_addr = 0;
1004         ctx->sa_len = 0;
1005
1006         switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
1007         default:
1008                 tfm->crt_ablkcipher.reqsize = sizeof(struct crypto4xx_ctx);
1009                 break;
1010         case CRYPTO_ALG_TYPE_AHASH:
1011                 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
1012                                          sizeof(struct crypto4xx_ctx));
1013                 break;
1014         }
1015
1016         return 0;
1017 }
1018
1019 static void crypto4xx_alg_exit(struct crypto_tfm *tfm)
1020 {
1021         struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
1022
1023         crypto4xx_free_sa(ctx);
1024         crypto4xx_free_state_record(ctx);
1025 }
1026
1027 int crypto4xx_register_alg(struct crypto4xx_device *sec_dev,
1028                            struct crypto4xx_alg_common *crypto_alg,
1029                            int array_size)
1030 {
1031         struct crypto4xx_alg *alg;
1032         int i;
1033         int rc = 0;
1034
1035         for (i = 0; i < array_size; i++) {
1036                 alg = kzalloc(sizeof(struct crypto4xx_alg), GFP_KERNEL);
1037                 if (!alg)
1038                         return -ENOMEM;
1039
1040                 alg->alg = crypto_alg[i];
1041                 alg->dev = sec_dev;
1042
1043                 switch (alg->alg.type) {
1044                 case CRYPTO_ALG_TYPE_AHASH:
1045                         rc = crypto_register_ahash(&alg->alg.u.hash);
1046                         break;
1047
1048                 default:
1049                         rc = crypto_register_alg(&alg->alg.u.cipher);
1050                         break;
1051                 }
1052
1053                 if (rc) {
1054                         list_del(&alg->entry);
1055                         kfree(alg);
1056                 } else {
1057                         list_add_tail(&alg->entry, &sec_dev->alg_list);
1058                 }
1059         }
1060
1061         return 0;
1062 }
1063
1064 static void crypto4xx_unregister_alg(struct crypto4xx_device *sec_dev)
1065 {
1066         struct crypto4xx_alg *alg, *tmp;
1067
1068         list_for_each_entry_safe(alg, tmp, &sec_dev->alg_list, entry) {
1069                 list_del(&alg->entry);
1070                 switch (alg->alg.type) {
1071                 case CRYPTO_ALG_TYPE_AHASH:
1072                         crypto_unregister_ahash(&alg->alg.u.hash);
1073                         break;
1074
1075                 default:
1076                         crypto_unregister_alg(&alg->alg.u.cipher);
1077                 }
1078                 kfree(alg);
1079         }
1080 }
1081
1082 static void crypto4xx_bh_tasklet_cb(unsigned long data)
1083 {
1084         struct device *dev = (struct device *)data;
1085         struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
1086         struct pd_uinfo *pd_uinfo;
1087         struct ce_pd *pd;
1088         u32 tail;
1089
1090         while (core_dev->dev->pdr_head != core_dev->dev->pdr_tail) {
1091                 tail = core_dev->dev->pdr_tail;
1092                 pd_uinfo = core_dev->dev->pdr_uinfo +
1093                         sizeof(struct pd_uinfo)*tail;
1094                 pd =  core_dev->dev->pdr + sizeof(struct ce_pd) * tail;
1095                 if ((pd_uinfo->state == PD_ENTRY_INUSE) &&
1096                                    pd->pd_ctl.bf.pe_done &&
1097                                    !pd->pd_ctl.bf.host_ready) {
1098                         pd->pd_ctl.bf.pe_done = 0;
1099                         crypto4xx_pd_done(core_dev->dev, tail);
1100                         crypto4xx_put_pd_to_pdr(core_dev->dev, tail);
1101                         pd_uinfo->state = PD_ENTRY_FREE;
1102                 } else {
1103                         /* if tail not done, break */
1104                         break;
1105                 }
1106         }
1107 }
1108
1109 /**
1110  * Top Half of isr.
1111  */
1112 static irqreturn_t crypto4xx_ce_interrupt_handler(int irq, void *data)
1113 {
1114         struct device *dev = (struct device *)data;
1115         struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
1116
1117         if (core_dev->dev->ce_base == 0)
1118                 return 0;
1119
1120         writel(PPC4XX_INTERRUPT_CLR,
1121                core_dev->dev->ce_base + CRYPTO4XX_INT_CLR);
1122         tasklet_schedule(&core_dev->tasklet);
1123
1124         return IRQ_HANDLED;
1125 }
1126
1127 /**
1128  * Supported Crypto Algorithms
1129  */
1130 struct crypto4xx_alg_common crypto4xx_alg[] = {
1131         /* Crypto AES modes */
1132         { .type = CRYPTO_ALG_TYPE_ABLKCIPHER, .u.cipher = {
1133                 .cra_name       = "cbc(aes)",
1134                 .cra_driver_name = "cbc-aes-ppc4xx",
1135                 .cra_priority   = CRYPTO4XX_CRYPTO_PRIORITY,
1136                 .cra_flags      = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
1137                 .cra_blocksize  = AES_BLOCK_SIZE,
1138                 .cra_ctxsize    = sizeof(struct crypto4xx_ctx),
1139                 .cra_type       = &crypto_ablkcipher_type,
1140                 .cra_init       = crypto4xx_alg_init,
1141                 .cra_exit       = crypto4xx_alg_exit,
1142                 .cra_module     = THIS_MODULE,
1143                 .cra_u          = {
1144                         .ablkcipher = {
1145                                 .min_keysize    = AES_MIN_KEY_SIZE,
1146                                 .max_keysize    = AES_MAX_KEY_SIZE,
1147                                 .ivsize         = AES_IV_SIZE,
1148                                 .setkey         = crypto4xx_setkey_aes_cbc,
1149                                 .encrypt        = crypto4xx_encrypt,
1150                                 .decrypt        = crypto4xx_decrypt,
1151                         }
1152                 }
1153         }},
1154 };
1155
1156 /**
1157  * Module Initialization Routine
1158  */
1159 static int __init crypto4xx_probe(struct platform_device *ofdev)
1160 {
1161         int rc;
1162         struct resource res;
1163         struct device *dev = &ofdev->dev;
1164         struct crypto4xx_core_device *core_dev;
1165
1166         rc = of_address_to_resource(ofdev->dev.of_node, 0, &res);
1167         if (rc)
1168                 return -ENODEV;
1169
1170         if (of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-crypto")) {
1171                 mtdcri(SDR0, PPC460EX_SDR0_SRST,
1172                        mfdcri(SDR0, PPC460EX_SDR0_SRST) | PPC460EX_CE_RESET);
1173                 mtdcri(SDR0, PPC460EX_SDR0_SRST,
1174                        mfdcri(SDR0, PPC460EX_SDR0_SRST) & ~PPC460EX_CE_RESET);
1175         } else if (of_find_compatible_node(NULL, NULL,
1176                         "amcc,ppc405ex-crypto")) {
1177                 mtdcri(SDR0, PPC405EX_SDR0_SRST,
1178                        mfdcri(SDR0, PPC405EX_SDR0_SRST) | PPC405EX_CE_RESET);
1179                 mtdcri(SDR0, PPC405EX_SDR0_SRST,
1180                        mfdcri(SDR0, PPC405EX_SDR0_SRST) & ~PPC405EX_CE_RESET);
1181         } else if (of_find_compatible_node(NULL, NULL,
1182                         "amcc,ppc460sx-crypto")) {
1183                 mtdcri(SDR0, PPC460SX_SDR0_SRST,
1184                        mfdcri(SDR0, PPC460SX_SDR0_SRST) | PPC460SX_CE_RESET);
1185                 mtdcri(SDR0, PPC460SX_SDR0_SRST,
1186                        mfdcri(SDR0, PPC460SX_SDR0_SRST) & ~PPC460SX_CE_RESET);
1187         } else {
1188                 printk(KERN_ERR "Crypto Function Not supported!\n");
1189                 return -EINVAL;
1190         }
1191
1192         core_dev = kzalloc(sizeof(struct crypto4xx_core_device), GFP_KERNEL);
1193         if (!core_dev)
1194                 return -ENOMEM;
1195
1196         dev_set_drvdata(dev, core_dev);
1197         core_dev->ofdev = ofdev;
1198         core_dev->dev = kzalloc(sizeof(struct crypto4xx_device), GFP_KERNEL);
1199         if (!core_dev->dev)
1200                 goto err_alloc_dev;
1201
1202         core_dev->dev->core_dev = core_dev;
1203         core_dev->device = dev;
1204         spin_lock_init(&core_dev->lock);
1205         INIT_LIST_HEAD(&core_dev->dev->alg_list);
1206         rc = crypto4xx_build_pdr(core_dev->dev);
1207         if (rc)
1208                 goto err_build_pdr;
1209
1210         rc = crypto4xx_build_gdr(core_dev->dev);
1211         if (rc)
1212                 goto err_build_gdr;
1213
1214         rc = crypto4xx_build_sdr(core_dev->dev);
1215         if (rc)
1216                 goto err_build_sdr;
1217
1218         /* Init tasklet for bottom half processing */
1219         tasklet_init(&core_dev->tasklet, crypto4xx_bh_tasklet_cb,
1220                      (unsigned long) dev);
1221
1222         /* Register for Crypto isr, Crypto Engine IRQ */
1223         core_dev->irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
1224         rc = request_irq(core_dev->irq, crypto4xx_ce_interrupt_handler, 0,
1225                          core_dev->dev->name, dev);
1226         if (rc)
1227                 goto err_request_irq;
1228
1229         core_dev->dev->ce_base = of_iomap(ofdev->dev.of_node, 0);
1230         if (!core_dev->dev->ce_base) {
1231                 dev_err(dev, "failed to of_iomap\n");
1232                 rc = -ENOMEM;
1233                 goto err_iomap;
1234         }
1235
1236         /* need to setup pdr, rdr, gdr and sdr before this */
1237         crypto4xx_hw_init(core_dev->dev);
1238
1239         /* Register security algorithms with Linux CryptoAPI */
1240         rc = crypto4xx_register_alg(core_dev->dev, crypto4xx_alg,
1241                                ARRAY_SIZE(crypto4xx_alg));
1242         if (rc)
1243                 goto err_start_dev;
1244
1245         return 0;
1246
1247 err_start_dev:
1248         iounmap(core_dev->dev->ce_base);
1249 err_iomap:
1250         free_irq(core_dev->irq, dev);
1251 err_request_irq:
1252         irq_dispose_mapping(core_dev->irq);
1253         tasklet_kill(&core_dev->tasklet);
1254         crypto4xx_destroy_sdr(core_dev->dev);
1255 err_build_sdr:
1256         crypto4xx_destroy_gdr(core_dev->dev);
1257 err_build_gdr:
1258         crypto4xx_destroy_pdr(core_dev->dev);
1259 err_build_pdr:
1260         kfree(core_dev->dev);
1261 err_alloc_dev:
1262         kfree(core_dev);
1263
1264         return rc;
1265 }
1266
1267 static int __exit crypto4xx_remove(struct platform_device *ofdev)
1268 {
1269         struct device *dev = &ofdev->dev;
1270         struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
1271
1272         free_irq(core_dev->irq, dev);
1273         irq_dispose_mapping(core_dev->irq);
1274
1275         tasklet_kill(&core_dev->tasklet);
1276         /* Un-register with Linux CryptoAPI */
1277         crypto4xx_unregister_alg(core_dev->dev);
1278         /* Free all allocated memory */
1279         crypto4xx_stop_all(core_dev);
1280
1281         return 0;
1282 }
1283
1284 static const struct of_device_id crypto4xx_match[] = {
1285         { .compatible      = "amcc,ppc4xx-crypto",},
1286         { },
1287 };
1288
1289 static struct platform_driver crypto4xx_driver = {
1290         .driver = {
1291                 .name = "crypto4xx",
1292                 .owner = THIS_MODULE,
1293                 .of_match_table = crypto4xx_match,
1294         },
1295         .probe          = crypto4xx_probe,
1296         .remove         = crypto4xx_remove,
1297 };
1298
1299 module_platform_driver(crypto4xx_driver);
1300
1301 MODULE_LICENSE("GPL");
1302 MODULE_AUTHOR("James Hsiao <jhsiao@amcc.com>");
1303 MODULE_DESCRIPTION("Driver for AMCC PPC4xx crypto accelerator");
1304