drivers/crypto/ixp4xx_crypto.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Intel IXP4xx NPE-C crypto driver
   4  *
   5  * Copyright (C) 2008 Christian Hohnstaedt <chohnstaedt@innominate.com>
   6  */
   7
   8 #include <linux/platform_device.h>
   9 #include <linux/dma-mapping.h>
  10 #include <linux/dmapool.h>
  11 #include <linux/crypto.h>
  12 #include <linux/kernel.h>
  13 #include <linux/rtnetlink.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/gfp.h>
  17 #include <linux/module.h>
  18
  19 #include <crypto/ctr.h>
  20 #include <crypto/internal/des.h>
  21 #include <crypto/aes.h>
  22 #include <crypto/hmac.h>
  23 #include <crypto/sha.h>
  24 #include <crypto/algapi.h>
  25 #include <crypto/internal/aead.h>
  26 #include <crypto/internal/skcipher.h>
  27 #include <crypto/authenc.h>
  28 #include <crypto/scatterwalk.h>
  29
  30 #include <linux/soc/ixp4xx/npe.h>
  31 #include <linux/soc/ixp4xx/qmgr.h>
  32
  33 #define MAX_KEYLEN 32
  34
  35 /* hash: cfgword + 2 * digestlen; crypt: keylen + cfgword */
  36 #define NPE_CTX_LEN 80
  37 #define AES_BLOCK128 16
  38
  39 #define NPE_OP_HASH_VERIFY   0x01
  40 #define NPE_OP_CCM_ENABLE    0x04
  41 #define NPE_OP_CRYPT_ENABLE  0x08
  42 #define NPE_OP_HASH_ENABLE   0x10
  43 #define NPE_OP_NOT_IN_PLACE  0x20
  44 #define NPE_OP_HMAC_DISABLE  0x40
  45 #define NPE_OP_CRYPT_ENCRYPT 0x80
  46
  47 #define NPE_OP_CCM_GEN_MIC   0xcc
  48 #define NPE_OP_HASH_GEN_ICV  0x50
  49 #define NPE_OP_ENC_GEN_KEY   0xc9
  50
  51 #define MOD_ECB     0x0000
  52 #define MOD_CTR     0x1000
  53 #define MOD_CBC_ENC 0x2000
  54 #define MOD_CBC_DEC 0x3000
  55 #define MOD_CCM_ENC 0x4000
  56 #define MOD_CCM_DEC 0x5000
  57
  58 #define KEYLEN_128  4
  59 #define KEYLEN_192  6
  60 #define KEYLEN_256  8
  61
  62 #define CIPH_DECR   0x0000
  63 #define CIPH_ENCR   0x0400
  64
  65 #define MOD_DES     0x0000
  66 #define MOD_TDEA2   0x0100
  67 #define MOD_3DES   0x0200
  68 #define MOD_AES     0x0800
  69 #define MOD_AES128  (0x0800 | KEYLEN_128)
  70 #define MOD_AES192  (0x0900 | KEYLEN_192)
  71 #define MOD_AES256  (0x0a00 | KEYLEN_256)
  72
  73 #define MAX_IVLEN   16
  74 #define NPE_ID      2  /* NPE C */
  75 #define NPE_QLEN    16
  76 /* Space for registering when the first
  77  * NPE_QLEN crypt_ctl are busy */
  78 #define NPE_QLEN_TOTAL 64
  79
  80 #define SEND_QID    29
  81 #define RECV_QID    30
  82
  83 #define CTL_FLAG_UNUSED         0x0000
  84 #define CTL_FLAG_USED           0x1000
  85 #define CTL_FLAG_PERFORM_ABLK   0x0001
  86 #define CTL_FLAG_GEN_ICV        0x0002
  87 #define CTL_FLAG_GEN_REVAES     0x0004
  88 #define CTL_FLAG_PERFORM_AEAD   0x0008
  89 #define CTL_FLAG_MASK           0x000f
  90
  91 #define HMAC_PAD_BLOCKLEN SHA1_BLOCK_SIZE
  92
  93 #define MD5_DIGEST_SIZE   16
  94
  95 struct buffer_desc {
  96         u32 phys_next;
  97 #ifdef __ARMEB__
  98         u16 buf_len;
  99         u16 pkt_len;
 100 #else
 101         u16 pkt_len;
 102         u16 buf_len;
 103 #endif
 104         dma_addr_t phys_addr;
 105         u32 __reserved[4];
 106         struct buffer_desc *next;
 107         enum dma_data_direction dir;
 108 };
 109
 110 struct crypt_ctl {
 111 #ifdef __ARMEB__
 112         u8 mode;                /* NPE_OP_*  operation mode */
 113         u8 init_len;
 114         u16 reserved;
 115 #else
 116         u16 reserved;
 117         u8 init_len;
 118         u8 mode;                /* NPE_OP_*  operation mode */
 119 #endif
 120         u8 iv[MAX_IVLEN];       /* IV for CBC mode or CTR IV for CTR mode */
 121         dma_addr_t icv_rev_aes; /* icv or rev aes */
 122         dma_addr_t src_buf;
 123         dma_addr_t dst_buf;
 124 #ifdef __ARMEB__
 125         u16 auth_offs;          /* Authentication start offset */
 126         u16 auth_len;           /* Authentication data length */
 127         u16 crypt_offs;         /* Cryption start offset */
 128         u16 crypt_len;          /* Cryption data length */
 129 #else
 130         u16 auth_len;           /* Authentication data length */
 131         u16 auth_offs;          /* Authentication start offset */
 132         u16 crypt_len;          /* Cryption data length */
 133         u16 crypt_offs;         /* Cryption start offset */
 134 #endif
 135         u32 aadAddr;            /* Additional Auth Data Addr for CCM mode */
 136         u32 crypto_ctx;         /* NPE Crypto Param structure address */
 137
 138         /* Used by Host: 4*4 bytes*/
 139         unsigned ctl_flags;
 140         union {
 141                 struct skcipher_request *ablk_req;
 142                 struct aead_request *aead_req;
 143                 struct crypto_tfm *tfm;
 144         } data;
 145         struct buffer_desc *regist_buf;
 146         u8 *regist_ptr;
 147 };
 148
 149 struct ablk_ctx {
 150         struct buffer_desc *src;
 151         struct buffer_desc *dst;
 152 };
 153
 154 struct aead_ctx {
 155         struct buffer_desc *src;
 156         struct buffer_desc *dst;
 157         struct scatterlist ivlist;
 158         /* used when the hmac is not on one sg entry */
 159         u8 *hmac_virt;
 160         int encrypt;
 161 };
 162
 163 struct ix_hash_algo {
 164         u32 cfgword;
 165         unsigned char *icv;
 166 };
 167
 168 struct ix_sa_dir {
 169         unsigned char *npe_ctx;
 170         dma_addr_t npe_ctx_phys;
 171         int npe_ctx_idx;
 172         u8 npe_mode;
 173 };
 174
 175 struct ixp_ctx {
 176         struct ix_sa_dir encrypt;
 177         struct ix_sa_dir decrypt;
 178         int authkey_len;
 179         u8 authkey[MAX_KEYLEN];
 180         int enckey_len;
 181         u8 enckey[MAX_KEYLEN];
 182         u8 salt[MAX_IVLEN];
 183         u8 nonce[CTR_RFC3686_NONCE_SIZE];
 184         unsigned salted;
 185         atomic_t configuring;
 186         struct completion completion;
 187 };
 188
 189 struct ixp_alg {
 190         struct skcipher_alg crypto;
 191         const struct ix_hash_algo *hash;
 192         u32 cfg_enc;
 193         u32 cfg_dec;
 194
 195         int registered;
 196 };
 197
 198 struct ixp_aead_alg {
 199         struct aead_alg crypto;
 200         const struct ix_hash_algo *hash;
 201         u32 cfg_enc;
 202         u32 cfg_dec;
 203
 204         int registered;
 205 };
 206
 207 static const struct ix_hash_algo hash_alg_md5 = {
 208         .cfgword        = 0xAA010004,
 209         .icv            = "\x01\x23\x45\x67\x89\xAB\xCD\xEF"
 210                           "\xFE\xDC\xBA\x98\x76\x54\x32\x10",
 211 };
 212 static const struct ix_hash_algo hash_alg_sha1 = {
 213         .cfgword        = 0x00000005,
 214         .icv            = "\x67\x45\x23\x01\xEF\xCD\xAB\x89\x98\xBA"
 215                           "\xDC\xFE\x10\x32\x54\x76\xC3\xD2\xE1\xF0",
 216 };
 217
 218 static struct npe *npe_c;
 219 static struct dma_pool *buffer_pool = NULL;
 220 static struct dma_pool *ctx_pool = NULL;
 221
 222 static struct crypt_ctl *crypt_virt = NULL;
 223 static dma_addr_t crypt_phys;
 224
 225 static int support_aes = 1;
 226
 227 #define DRIVER_NAME "ixp4xx_crypto"
 228
 229 static struct platform_device *pdev;
 230
 231 static inline dma_addr_t crypt_virt2phys(struct crypt_ctl *virt)
 232 {
 233         return crypt_phys + (virt - crypt_virt) * sizeof(struct crypt_ctl);
 234 }
 235
 236 static inline struct crypt_ctl *crypt_phys2virt(dma_addr_t phys)
 237 {
 238         return crypt_virt + (phys - crypt_phys) / sizeof(struct crypt_ctl);
 239 }
 240
 241 static inline u32 cipher_cfg_enc(struct crypto_tfm *tfm)
 242 {
 243         return container_of(tfm->__crt_alg, struct ixp_alg,crypto.base)->cfg_enc;
 244 }
 245
 246 static inline u32 cipher_cfg_dec(struct crypto_tfm *tfm)
 247 {
 248         return container_of(tfm->__crt_alg, struct ixp_alg,crypto.base)->cfg_dec;
 249 }
 250
 251 static inline const struct ix_hash_algo *ix_hash(struct crypto_tfm *tfm)
 252 {
 253         return container_of(tfm->__crt_alg, struct ixp_alg, crypto.base)->hash;
 254 }
 255
 256 static int setup_crypt_desc(void)
 257 {
 258         struct device *dev = &pdev->dev;
 259         BUILD_BUG_ON(sizeof(struct crypt_ctl) != 64);
 260         crypt_virt = dma_alloc_coherent(dev,
 261                                         NPE_QLEN * sizeof(struct crypt_ctl),
 262                                         &crypt_phys, GFP_ATOMIC);
 263         if (!crypt_virt)
 264                 return -ENOMEM;
 265         return 0;
 266 }
 267
 268 static spinlock_t desc_lock;
 269 static struct crypt_ctl *get_crypt_desc(void)
 270 {
 271         int i;
 272         static int idx = 0;
 273         unsigned long flags;
 274
 275         spin_lock_irqsave(&desc_lock, flags);
 276
 277         if (unlikely(!crypt_virt))
 278                 setup_crypt_desc();
 279         if (unlikely(!crypt_virt)) {
 280                 spin_unlock_irqrestore(&desc_lock, flags);
 281                 return NULL;
 282         }
 283         i = idx;
 284         if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
 285                 if (++idx >= NPE_QLEN)
 286                         idx = 0;
 287                 crypt_virt[i].ctl_flags = CTL_FLAG_USED;
 288                 spin_unlock_irqrestore(&desc_lock, flags);
 289                 return crypt_virt +i;
 290         } else {
 291                 spin_unlock_irqrestore(&desc_lock, flags);
 292                 return NULL;
 293         }
 294 }
 295
 296 static spinlock_t emerg_lock;
 297 static struct crypt_ctl *get_crypt_desc_emerg(void)
 298 {
 299         int i;
 300         static int idx = NPE_QLEN;
 301         struct crypt_ctl *desc;
 302         unsigned long flags;
 303
 304         desc = get_crypt_desc();
 305         if (desc)
 306                 return desc;
 307         if (unlikely(!crypt_virt))
 308                 return NULL;
 309
 310         spin_lock_irqsave(&emerg_lock, flags);
 311         i = idx;
 312         if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
 313                 if (++idx >= NPE_QLEN_TOTAL)
 314                         idx = NPE_QLEN;
 315                 crypt_virt[i].ctl_flags = CTL_FLAG_USED;
 316                 spin_unlock_irqrestore(&emerg_lock, flags);
 317                 return crypt_virt +i;
 318         } else {
 319                 spin_unlock_irqrestore(&emerg_lock, flags);
 320                 return NULL;
 321         }
 322 }
 323
 324 static void free_buf_chain(struct device *dev, struct buffer_desc *buf,
 325                            dma_addr_t phys)
 326 {
 327         while (buf) {
 328                 struct buffer_desc *buf1;
 329                 u32 phys1;
 330
 331                 buf1 = buf->next;
 332                 phys1 = buf->phys_next;
 333                 dma_unmap_single(dev, buf->phys_next, buf->buf_len, buf->dir);
 334                 dma_pool_free(buffer_pool, buf, phys);
 335                 buf = buf1;
 336                 phys = phys1;
 337         }
 338 }
 339
 340 static struct tasklet_struct crypto_done_tasklet;
 341
 342 static void finish_scattered_hmac(struct crypt_ctl *crypt)
 343 {
 344         struct aead_request *req = crypt->data.aead_req;
 345         struct aead_ctx *req_ctx = aead_request_ctx(req);
 346         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 347         int authsize = crypto_aead_authsize(tfm);
 348         int decryptlen = req->assoclen + req->cryptlen - authsize;
 349
 350         if (req_ctx->encrypt) {
 351                 scatterwalk_map_and_copy(req_ctx->hmac_virt,
 352                         req->dst, decryptlen, authsize, 1);
 353         }
 354         dma_pool_free(buffer_pool, req_ctx->hmac_virt, crypt->icv_rev_aes);
 355 }
 356
 357 static void one_packet(dma_addr_t phys)
 358 {
 359         struct device *dev = &pdev->dev;
 360         struct crypt_ctl *crypt;
 361         struct ixp_ctx *ctx;
 362         int failed;
 363
 364         failed = phys & 0x1 ? -EBADMSG : 0;
 365         phys &= ~0x3;
 366         crypt = crypt_phys2virt(phys);
 367
 368         switch (crypt->ctl_flags & CTL_FLAG_MASK) {
 369         case CTL_FLAG_PERFORM_AEAD: {
 370                 struct aead_request *req = crypt->data.aead_req;
 371                 struct aead_ctx *req_ctx = aead_request_ctx(req);
 372
 373                 free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 374                 free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 375                 if (req_ctx->hmac_virt) {
 376                         finish_scattered_hmac(crypt);
 377                 }
 378                 req->base.complete(&req->base, failed);
 379                 break;
 380         }
 381         case CTL_FLAG_PERFORM_ABLK: {
 382                 struct skcipher_request *req = crypt->data.ablk_req;
 383                 struct ablk_ctx *req_ctx = skcipher_request_ctx(req);
 384
 385                 if (req_ctx->dst) {
 386                         free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 387                 }
 388                 free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 389                 req->base.complete(&req->base, failed);
 390                 break;
 391         }
 392         case CTL_FLAG_GEN_ICV:
 393                 ctx = crypto_tfm_ctx(crypt->data.tfm);
 394                 dma_pool_free(ctx_pool, crypt->regist_ptr,
 395                                 crypt->regist_buf->phys_addr);
 396                 dma_pool_free(buffer_pool, crypt->regist_buf, crypt->src_buf);
 397                 if (atomic_dec_and_test(&ctx->configuring))
 398                         complete(&ctx->completion);
 399                 break;
 400         case CTL_FLAG_GEN_REVAES:
 401                 ctx = crypto_tfm_ctx(crypt->data.tfm);
 402                 *(u32*)ctx->decrypt.npe_ctx &= cpu_to_be32(~CIPH_ENCR);
 403                 if (atomic_dec_and_test(&ctx->configuring))
 404                         complete(&ctx->completion);
 405                 break;
 406         default:
 407                 BUG();
 408         }
 409         crypt->ctl_flags = CTL_FLAG_UNUSED;
 410 }
 411
 412 static void irqhandler(void *_unused)
 413 {
 414         tasklet_schedule(&crypto_done_tasklet);
 415 }
 416
 417 static void crypto_done_action(unsigned long arg)
 418 {
 419         int i;
 420
 421         for(i=0; i<4; i++) {
 422                 dma_addr_t phys = qmgr_get_entry(RECV_QID);
 423                 if (!phys)
 424                         return;
 425                 one_packet(phys);
 426         }
 427         tasklet_schedule(&crypto_done_tasklet);
 428 }
 429
 430 static int init_ixp_crypto(struct device *dev)
 431 {
 432         int ret = -ENODEV;
 433         u32 msg[2] = { 0, 0 };
 434
 435         if (! ( ~(*IXP4XX_EXP_CFG2) & (IXP4XX_FEATURE_HASH |
 436                                 IXP4XX_FEATURE_AES | IXP4XX_FEATURE_DES))) {
 437                 printk(KERN_ERR "ixp_crypto: No HW crypto available\n");
 438                 return ret;
 439         }
 440         npe_c = npe_request(NPE_ID);
 441         if (!npe_c)
 442                 return ret;
 443
 444         if (!npe_running(npe_c)) {
 445                 ret = npe_load_firmware(npe_c, npe_name(npe_c), dev);
 446                 if (ret)
 447                         goto npe_release;
 448                 if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
 449                         goto npe_error;
 450         } else {
 451                 if (npe_send_message(npe_c, msg, "STATUS_MSG"))
 452                         goto npe_error;
 453
 454                 if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
 455                         goto npe_error;
 456         }
 457
 458         switch ((msg[1]>>16) & 0xff) {
 459         case 3:
 460                 printk(KERN_WARNING "Firmware of %s lacks AES support\n",
 461                                 npe_name(npe_c));
 462                 support_aes = 0;
 463                 break;
 464         case 4:
 465         case 5:
 466                 support_aes = 1;
 467                 break;
 468         default:
 469                 printk(KERN_ERR "Firmware of %s lacks crypto support\n",
 470                         npe_name(npe_c));
 471                 ret = -ENODEV;
 472                 goto npe_release;
 473         }
 474         /* buffer_pool will also be used to sometimes store the hmac,
 475          * so assure it is large enough
 476          */
 477         BUILD_BUG_ON(SHA1_DIGEST_SIZE > sizeof(struct buffer_desc));
 478         buffer_pool = dma_pool_create("buffer", dev,
 479                         sizeof(struct buffer_desc), 32, 0);
 480         ret = -ENOMEM;
 481         if (!buffer_pool) {
 482                 goto err;
 483         }
 484         ctx_pool = dma_pool_create("context", dev,
 485                         NPE_CTX_LEN, 16, 0);
 486         if (!ctx_pool) {
 487                 goto err;
 488         }
 489         ret = qmgr_request_queue(SEND_QID, NPE_QLEN_TOTAL, 0, 0,
 490                                  "ixp_crypto:out", NULL);
 491         if (ret)
 492                 goto err;
 493         ret = qmgr_request_queue(RECV_QID, NPE_QLEN, 0, 0,
 494                                  "ixp_crypto:in", NULL);
 495         if (ret) {
 496                 qmgr_release_queue(SEND_QID);
 497                 goto err;
 498         }
 499         qmgr_set_irq(RECV_QID, QUEUE_IRQ_SRC_NOT_EMPTY, irqhandler, NULL);
 500         tasklet_init(&crypto_done_tasklet, crypto_done_action, 0);
 501
 502         qmgr_enable_irq(RECV_QID);
 503         return 0;
 504
 505 npe_error:
 506         printk(KERN_ERR "%s not responding\n", npe_name(npe_c));
 507         ret = -EIO;
 508 err:
 509         dma_pool_destroy(ctx_pool);
 510         dma_pool_destroy(buffer_pool);
 511 npe_release:
 512         npe_release(npe_c);
 513         return ret;
 514 }
 515
 516 static void release_ixp_crypto(struct device *dev)
 517 {
 518         qmgr_disable_irq(RECV_QID);
 519         tasklet_kill(&crypto_done_tasklet);
 520
 521         qmgr_release_queue(SEND_QID);
 522         qmgr_release_queue(RECV_QID);
 523
 524         dma_pool_destroy(ctx_pool);
 525         dma_pool_destroy(buffer_pool);
 526
 527         npe_release(npe_c);
 528
 529         if (crypt_virt) {
 530                 dma_free_coherent(dev,
 531                         NPE_QLEN_TOTAL * sizeof( struct crypt_ctl),
 532                         crypt_virt, crypt_phys);
 533         }
 534 }
 535
 536 static void reset_sa_dir(struct ix_sa_dir *dir)
 537 {
 538         memset(dir->npe_ctx, 0, NPE_CTX_LEN);
 539         dir->npe_ctx_idx = 0;
 540         dir->npe_mode = 0;
 541 }
 542
 543 static int init_sa_dir(struct ix_sa_dir *dir)
 544 {
 545         dir->npe_ctx = dma_pool_alloc(ctx_pool, GFP_KERNEL, &dir->npe_ctx_phys);
 546         if (!dir->npe_ctx) {
 547                 return -ENOMEM;
 548         }
 549         reset_sa_dir(dir);
 550         return 0;
 551 }
 552
 553 static void free_sa_dir(struct ix_sa_dir *dir)
 554 {
 555         memset(dir->npe_ctx, 0, NPE_CTX_LEN);
 556         dma_pool_free(ctx_pool, dir->npe_ctx, dir->npe_ctx_phys);
 557 }
 558
 559 static int init_tfm(struct crypto_tfm *tfm)
 560 {
 561         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 562         int ret;
 563
 564         atomic_set(&ctx->configuring, 0);
 565         ret = init_sa_dir(&ctx->encrypt);
 566         if (ret)
 567                 return ret;
 568         ret = init_sa_dir(&ctx->decrypt);
 569         if (ret) {
 570                 free_sa_dir(&ctx->encrypt);
 571         }
 572         return ret;
 573 }
 574
 575 static int init_tfm_ablk(struct crypto_skcipher *tfm)
 576 {
 577         crypto_skcipher_set_reqsize(tfm, sizeof(struct ablk_ctx));
 578         return init_tfm(crypto_skcipher_tfm(tfm));
 579 }
 580
 581 static int init_tfm_aead(struct crypto_aead *tfm)
 582 {
 583         crypto_aead_set_reqsize(tfm, sizeof(struct aead_ctx));
 584         return init_tfm(crypto_aead_tfm(tfm));
 585 }
 586
 587 static void exit_tfm(struct crypto_tfm *tfm)
 588 {
 589         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 590         free_sa_dir(&ctx->encrypt);
 591         free_sa_dir(&ctx->decrypt);
 592 }
 593
 594 static void exit_tfm_ablk(struct crypto_skcipher *tfm)
 595 {
 596         exit_tfm(crypto_skcipher_tfm(tfm));
 597 }
 598
 599 static void exit_tfm_aead(struct crypto_aead *tfm)
 600 {
 601         exit_tfm(crypto_aead_tfm(tfm));
 602 }
 603
 604 static int register_chain_var(struct crypto_tfm *tfm, u8 xpad, u32 target,
 605                 int init_len, u32 ctx_addr, const u8 *key, int key_len)
 606 {
 607         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 608         struct crypt_ctl *crypt;
 609         struct buffer_desc *buf;
 610         int i;
 611         u8 *pad;
 612         dma_addr_t pad_phys, buf_phys;
 613
 614         BUILD_BUG_ON(NPE_CTX_LEN < HMAC_PAD_BLOCKLEN);
 615         pad = dma_pool_alloc(ctx_pool, GFP_KERNEL, &pad_phys);
 616         if (!pad)
 617                 return -ENOMEM;
 618         buf = dma_pool_alloc(buffer_pool, GFP_KERNEL, &buf_phys);
 619         if (!buf) {
 620                 dma_pool_free(ctx_pool, pad, pad_phys);
 621                 return -ENOMEM;
 622         }
 623         crypt = get_crypt_desc_emerg();
 624         if (!crypt) {
 625                 dma_pool_free(ctx_pool, pad, pad_phys);
 626                 dma_pool_free(buffer_pool, buf, buf_phys);
 627                 return -EAGAIN;
 628         }
 629
 630         memcpy(pad, key, key_len);
 631         memset(pad + key_len, 0, HMAC_PAD_BLOCKLEN - key_len);
 632         for (i = 0; i < HMAC_PAD_BLOCKLEN; i++) {
 633                 pad[i] ^= xpad;
 634         }
 635
 636         crypt->data.tfm = tfm;
 637         crypt->regist_ptr = pad;
 638         crypt->regist_buf = buf;
 639
 640         crypt->auth_offs = 0;
 641         crypt->auth_len = HMAC_PAD_BLOCKLEN;
 642         crypt->crypto_ctx = ctx_addr;
 643         crypt->src_buf = buf_phys;
 644         crypt->icv_rev_aes = target;
 645         crypt->mode = NPE_OP_HASH_GEN_ICV;
 646         crypt->init_len = init_len;
 647         crypt->ctl_flags |= CTL_FLAG_GEN_ICV;
 648
 649         buf->next = 0;
 650         buf->buf_len = HMAC_PAD_BLOCKLEN;
 651         buf->pkt_len = 0;
 652         buf->phys_addr = pad_phys;
 653
 654         atomic_inc(&ctx->configuring);
 655         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 656         BUG_ON(qmgr_stat_overflow(SEND_QID));
 657         return 0;
 658 }
 659
 660 static int setup_auth(struct crypto_tfm *tfm, int encrypt, unsigned authsize,
 661                 const u8 *key, int key_len, unsigned digest_len)
 662 {
 663         u32 itarget, otarget, npe_ctx_addr;
 664         unsigned char *cinfo;
 665         int init_len, ret = 0;
 666         u32 cfgword;
 667         struct ix_sa_dir *dir;
 668         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 669         const struct ix_hash_algo *algo;
 670
 671         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 672         cinfo = dir->npe_ctx + dir->npe_ctx_idx;
 673         algo = ix_hash(tfm);
 674
 675         /* write cfg word to cryptinfo */
 676         cfgword = algo->cfgword | ( authsize << 6); /* (authsize/4) << 8 */
 677 #ifndef __ARMEB__
 678         cfgword ^= 0xAA000000; /* change the "byte swap" flags */
 679 #endif
 680         *(u32*)cinfo = cpu_to_be32(cfgword);
 681         cinfo += sizeof(cfgword);
 682
 683         /* write ICV to cryptinfo */
 684         memcpy(cinfo, algo->icv, digest_len);
 685         cinfo += digest_len;
 686
 687         itarget = dir->npe_ctx_phys + dir->npe_ctx_idx
 688                                 + sizeof(algo->cfgword);
 689         otarget = itarget + digest_len;
 690         init_len = cinfo - (dir->npe_ctx + dir->npe_ctx_idx);
 691         npe_ctx_addr = dir->npe_ctx_phys + dir->npe_ctx_idx;
 692
 693         dir->npe_ctx_idx += init_len;
 694         dir->npe_mode |= NPE_OP_HASH_ENABLE;
 695
 696         if (!encrypt)
 697                 dir->npe_mode |= NPE_OP_HASH_VERIFY;
 698
 699         ret = register_chain_var(tfm, HMAC_OPAD_VALUE, otarget,
 700                         init_len, npe_ctx_addr, key, key_len);
 701         if (ret)
 702                 return ret;
 703         return register_chain_var(tfm, HMAC_IPAD_VALUE, itarget,
 704                         init_len, npe_ctx_addr, key, key_len);
 705 }
 706
 707 static int gen_rev_aes_key(struct crypto_tfm *tfm)
 708 {
 709         struct crypt_ctl *crypt;
 710         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 711         struct ix_sa_dir *dir = &ctx->decrypt;
 712
 713         crypt = get_crypt_desc_emerg();
 714         if (!crypt) {
 715                 return -EAGAIN;
 716         }
 717         *(u32*)dir->npe_ctx |= cpu_to_be32(CIPH_ENCR);
 718
 719         crypt->data.tfm = tfm;
 720         crypt->crypt_offs = 0;
 721         crypt->crypt_len = AES_BLOCK128;
 722         crypt->src_buf = 0;
 723         crypt->crypto_ctx = dir->npe_ctx_phys;
 724         crypt->icv_rev_aes = dir->npe_ctx_phys + sizeof(u32);
 725         crypt->mode = NPE_OP_ENC_GEN_KEY;
 726         crypt->init_len = dir->npe_ctx_idx;
 727         crypt->ctl_flags |= CTL_FLAG_GEN_REVAES;
 728
 729         atomic_inc(&ctx->configuring);
 730         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 731         BUG_ON(qmgr_stat_overflow(SEND_QID));
 732         return 0;
 733 }
 734
 735 static int setup_cipher(struct crypto_tfm *tfm, int encrypt,
 736                 const u8 *key, int key_len)
 737 {
 738         u8 *cinfo;
 739         u32 cipher_cfg;
 740         u32 keylen_cfg = 0;
 741         struct ix_sa_dir *dir;
 742         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 743         u32 *flags = &tfm->crt_flags;
 744
 745         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 746         cinfo = dir->npe_ctx;
 747
 748         if (encrypt) {
 749                 cipher_cfg = cipher_cfg_enc(tfm);
 750                 dir->npe_mode |= NPE_OP_CRYPT_ENCRYPT;
 751         } else {
 752                 cipher_cfg = cipher_cfg_dec(tfm);
 753         }
 754         if (cipher_cfg & MOD_AES) {
 755                 switch (key_len) {
 756                 case 16: keylen_cfg = MOD_AES128; break;
 757                 case 24: keylen_cfg = MOD_AES192; break;
 758                 case 32: keylen_cfg = MOD_AES256; break;
 759                 default:
 760                         *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
 761                         return -EINVAL;
 762                 }
 763                 cipher_cfg |= keylen_cfg;
 764         } else {
 765                 crypto_des_verify_key(tfm, key);
 766         }
 767         /* write cfg word to cryptinfo */
 768         *(u32*)cinfo = cpu_to_be32(cipher_cfg);
 769         cinfo += sizeof(cipher_cfg);
 770
 771         /* write cipher key to cryptinfo */
 772         memcpy(cinfo, key, key_len);
 773         /* NPE wants keylen set to DES3_EDE_KEY_SIZE even for single DES */
 774         if (key_len < DES3_EDE_KEY_SIZE && !(cipher_cfg & MOD_AES)) {
 775                 memset(cinfo + key_len, 0, DES3_EDE_KEY_SIZE -key_len);
 776                 key_len = DES3_EDE_KEY_SIZE;
 777         }
 778         dir->npe_ctx_idx = sizeof(cipher_cfg) + key_len;
 779         dir->npe_mode |= NPE_OP_CRYPT_ENABLE;
 780         if ((cipher_cfg & MOD_AES) && !encrypt) {
 781                 return gen_rev_aes_key(tfm);
 782         }
 783         return 0;
 784 }
 785
 786 static struct buffer_desc *chainup_buffers(struct device *dev,
 787                 struct scatterlist *sg, unsigned nbytes,
 788                 struct buffer_desc *buf, gfp_t flags,
 789                 enum dma_data_direction dir)
 790 {
 791         for (; nbytes > 0; sg = sg_next(sg)) {
 792                 unsigned len = min(nbytes, sg->length);
 793                 struct buffer_desc *next_buf;
 794                 dma_addr_t next_buf_phys;
 795                 void *ptr;
 796
 797                 nbytes -= len;
 798                 ptr = sg_virt(sg);
 799                 next_buf = dma_pool_alloc(buffer_pool, flags, &next_buf_phys);
 800                 if (!next_buf) {
 801                         buf = NULL;
 802                         break;
 803                 }
 804                 sg_dma_address(sg) = dma_map_single(dev, ptr, len, dir);
 805                 buf->next = next_buf;
 806                 buf->phys_next = next_buf_phys;
 807                 buf = next_buf;
 808
 809                 buf->phys_addr = sg_dma_address(sg);
 810                 buf->buf_len = len;
 811                 buf->dir = dir;
 812         }
 813         buf->next = NULL;
 814         buf->phys_next = 0;
 815         return buf;
 816 }
 817
 818 static int ablk_setkey(struct crypto_skcipher *tfm, const u8 *key,
 819                         unsigned int key_len)
 820 {
 821         struct ixp_ctx *ctx = crypto_skcipher_ctx(tfm);
 822         u32 *flags = &tfm->base.crt_flags;
 823         int ret;
 824
 825         init_completion(&ctx->completion);
 826         atomic_inc(&ctx->configuring);
 827
 828         reset_sa_dir(&ctx->encrypt);
 829         reset_sa_dir(&ctx->decrypt);
 830
 831         ctx->encrypt.npe_mode = NPE_OP_HMAC_DISABLE;
 832         ctx->decrypt.npe_mode = NPE_OP_HMAC_DISABLE;
 833
 834         ret = setup_cipher(&tfm->base, 0, key, key_len);
 835         if (ret)
 836                 goto out;
 837         ret = setup_cipher(&tfm->base, 1, key, key_len);
 838         if (ret)
 839                 goto out;
 840
 841         if (*flags & CRYPTO_TFM_RES_WEAK_KEY) {
 842                 if (*flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS) {
 843                         ret = -EINVAL;
 844                 } else {
 845                         *flags &= ~CRYPTO_TFM_RES_WEAK_KEY;
 846                 }
 847         }
 848 out:
 849         if (!atomic_dec_and_test(&ctx->configuring))
 850                 wait_for_completion(&ctx->completion);
 851         return ret;
 852 }
 853
 854 static int ablk_des3_setkey(struct crypto_skcipher *tfm, const u8 *key,
 855                             unsigned int key_len)
 856 {
 857         return verify_skcipher_des3_key(tfm, key) ?:
 858                ablk_setkey(tfm, key, key_len);
 859 }
 860
 861 static int ablk_rfc3686_setkey(struct crypto_skcipher *tfm, const u8 *key,
 862                 unsigned int key_len)
 863 {
 864         struct ixp_ctx *ctx = crypto_skcipher_ctx(tfm);
 865
 866         /* the nonce is stored in bytes at end of key */
 867         if (key_len < CTR_RFC3686_NONCE_SIZE)
 868                 return -EINVAL;
 869
 870         memcpy(ctx->nonce, key + (key_len - CTR_RFC3686_NONCE_SIZE),
 871                         CTR_RFC3686_NONCE_SIZE);
 872
 873         key_len -= CTR_RFC3686_NONCE_SIZE;
 874         return ablk_setkey(tfm, key, key_len);
 875 }
 876
 877 static int ablk_perform(struct skcipher_request *req, int encrypt)
 878 {
 879         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 880         struct ixp_ctx *ctx = crypto_skcipher_ctx(tfm);
 881         unsigned ivsize = crypto_skcipher_ivsize(tfm);
 882         struct ix_sa_dir *dir;
 883         struct crypt_ctl *crypt;
 884         unsigned int nbytes = req->cryptlen;
 885         enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
 886         struct ablk_ctx *req_ctx = skcipher_request_ctx(req);
 887         struct buffer_desc src_hook;
 888         struct device *dev = &pdev->dev;
 889         gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
 890                                 GFP_KERNEL : GFP_ATOMIC;
 891
 892         if (qmgr_stat_full(SEND_QID))
 893                 return -EAGAIN;
 894         if (atomic_read(&ctx->configuring))
 895                 return -EAGAIN;
 896
 897         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 898
 899         crypt = get_crypt_desc();
 900         if (!crypt)
 901                 return -ENOMEM;
 902
 903         crypt->data.ablk_req = req;
 904         crypt->crypto_ctx = dir->npe_ctx_phys;
 905         crypt->mode = dir->npe_mode;
 906         crypt->init_len = dir->npe_ctx_idx;
 907
 908         crypt->crypt_offs = 0;
 909         crypt->crypt_len = nbytes;
 910
 911         BUG_ON(ivsize && !req->iv);
 912         memcpy(crypt->iv, req->iv, ivsize);
 913         if (req->src != req->dst) {
 914                 struct buffer_desc dst_hook;
 915                 crypt->mode |= NPE_OP_NOT_IN_PLACE;
 916                 /* This was never tested by Intel
 917                  * for more than one dst buffer, I think. */
 918                 req_ctx->dst = NULL;
 919                 if (!chainup_buffers(dev, req->dst, nbytes, &dst_hook,
 920                                         flags, DMA_FROM_DEVICE))
 921                         goto free_buf_dest;
 922                 src_direction = DMA_TO_DEVICE;
 923                 req_ctx->dst = dst_hook.next;
 924                 crypt->dst_buf = dst_hook.phys_next;
 925         } else {
 926                 req_ctx->dst = NULL;
 927         }
 928         req_ctx->src = NULL;
 929         if (!chainup_buffers(dev, req->src, nbytes, &src_hook,
 930                                 flags, src_direction))
 931                 goto free_buf_src;
 932
 933         req_ctx->src = src_hook.next;
 934         crypt->src_buf = src_hook.phys_next;
 935         crypt->ctl_flags |= CTL_FLAG_PERFORM_ABLK;
 936         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 937         BUG_ON(qmgr_stat_overflow(SEND_QID));
 938         return -EINPROGRESS;
 939
 940 free_buf_src:
 941         free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 942 free_buf_dest:
 943         if (req->src != req->dst) {
 944                 free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 945         }
 946         crypt->ctl_flags = CTL_FLAG_UNUSED;
 947         return -ENOMEM;
 948 }
 949
 950 static int ablk_encrypt(struct skcipher_request *req)
 951 {
 952         return ablk_perform(req, 1);
 953 }
 954
 955 static int ablk_decrypt(struct skcipher_request *req)
 956 {
 957         return ablk_perform(req, 0);
 958 }
 959
 960 static int ablk_rfc3686_crypt(struct skcipher_request *req)
 961 {
 962         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 963         struct ixp_ctx *ctx = crypto_skcipher_ctx(tfm);
 964         u8 iv[CTR_RFC3686_BLOCK_SIZE];
 965         u8 *info = req->iv;
 966         int ret;
 967
 968         /* set up counter block */
 969         memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE);
 970         memcpy(iv + CTR_RFC3686_NONCE_SIZE, info, CTR_RFC3686_IV_SIZE);
 971
 972         /* initialize counter portion of counter block */
 973         *(__be32 *)(iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) =
 974                 cpu_to_be32(1);
 975
 976         req->iv = iv;
 977         ret = ablk_perform(req, 1);
 978         req->iv = info;
 979         return ret;
 980 }
 981
 982 static int aead_perform(struct aead_request *req, int encrypt,
 983                 int cryptoffset, int eff_cryptlen, u8 *iv)
 984 {
 985         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 986         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
 987         unsigned ivsize = crypto_aead_ivsize(tfm);
 988         unsigned authsize = crypto_aead_authsize(tfm);
 989         struct ix_sa_dir *dir;
 990         struct crypt_ctl *crypt;
 991         unsigned int cryptlen;
 992         struct buffer_desc *buf, src_hook;
 993         struct aead_ctx *req_ctx = aead_request_ctx(req);
 994         struct device *dev = &pdev->dev;
 995         gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
 996                                 GFP_KERNEL : GFP_ATOMIC;
 997         enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
 998         unsigned int lastlen;
 999
1000         if (qmgr_stat_full(SEND_QID))
1001                 return -EAGAIN;
1002         if (atomic_read(&ctx->configuring))
1003                 return -EAGAIN;
1004
1005         if (encrypt) {
1006                 dir = &ctx->encrypt;
1007                 cryptlen = req->cryptlen;
1008         } else {
1009                 dir = &ctx->decrypt;
1010                 /* req->cryptlen includes the authsize when decrypting */
1011                 cryptlen = req->cryptlen -authsize;
1012                 eff_cryptlen -= authsize;
1013         }
1014         crypt = get_crypt_desc();
1015         if (!crypt)
1016                 return -ENOMEM;
1017
1018         crypt->data.aead_req = req;
1019         crypt->crypto_ctx = dir->npe_ctx_phys;
1020         crypt->mode = dir->npe_mode;
1021         crypt->init_len = dir->npe_ctx_idx;
1022
1023         crypt->crypt_offs = cryptoffset;
1024         crypt->crypt_len = eff_cryptlen;
1025
1026         crypt->auth_offs = 0;
1027         crypt->auth_len = req->assoclen + cryptlen;
1028         BUG_ON(ivsize && !req->iv);
1029         memcpy(crypt->iv, req->iv, ivsize);
1030
1031         buf = chainup_buffers(dev, req->src, crypt->auth_len,
1032                               &src_hook, flags, src_direction);
1033         req_ctx->src = src_hook.next;
1034         crypt->src_buf = src_hook.phys_next;
1035         if (!buf)
1036                 goto free_buf_src;
1037
1038         lastlen = buf->buf_len;
1039         if (lastlen >= authsize)
1040                 crypt->icv_rev_aes = buf->phys_addr +
1041                                      buf->buf_len - authsize;
1042
1043         req_ctx->dst = NULL;
1044
1045         if (req->src != req->dst) {
1046                 struct buffer_desc dst_hook;
1047
1048                 crypt->mode |= NPE_OP_NOT_IN_PLACE;
1049                 src_direction = DMA_TO_DEVICE;
1050
1051                 buf = chainup_buffers(dev, req->dst, crypt->auth_len,
1052                                       &dst_hook, flags, DMA_FROM_DEVICE);
1053                 req_ctx->dst = dst_hook.next;
1054                 crypt->dst_buf = dst_hook.phys_next;
1055
1056                 if (!buf)
1057                         goto free_buf_dst;
1058
1059                 if (encrypt) {
1060                         lastlen = buf->buf_len;
1061                         if (lastlen >= authsize)
1062                                 crypt->icv_rev_aes = buf->phys_addr +
1063                                                      buf->buf_len - authsize;
1064                 }
1065         }
1066
1067         if (unlikely(lastlen < authsize)) {
1068                 /* The 12 hmac bytes are scattered,
1069                  * we need to copy them into a safe buffer */
1070                 req_ctx->hmac_virt = dma_pool_alloc(buffer_pool, flags,
1071                                 &crypt->icv_rev_aes);
1072                 if (unlikely(!req_ctx->hmac_virt))
1073                         goto free_buf_dst;
1074                 if (!encrypt) {
1075                         scatterwalk_map_and_copy(req_ctx->hmac_virt,
1076                                 req->src, cryptlen, authsize, 0);
1077                 }
1078                 req_ctx->encrypt = encrypt;
1079         } else {
1080                 req_ctx->hmac_virt = NULL;
1081         }
1082
1083         crypt->ctl_flags |= CTL_FLAG_PERFORM_AEAD;
1084         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
1085         BUG_ON(qmgr_stat_overflow(SEND_QID));
1086         return -EINPROGRESS;
1087
1088 free_buf_dst:
1089         free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
1090 free_buf_src:
1091         free_buf_chain(dev, req_ctx->src, crypt->src_buf);
1092         crypt->ctl_flags = CTL_FLAG_UNUSED;
1093         return -ENOMEM;
1094 }
1095
1096 static int aead_setup(struct crypto_aead *tfm, unsigned int authsize)
1097 {
1098         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1099         u32 *flags = &tfm->base.crt_flags;
1100         unsigned digest_len = crypto_aead_maxauthsize(tfm);
1101         int ret;
1102
1103         if (!ctx->enckey_len && !ctx->authkey_len)
1104                 return 0;
1105         init_completion(&ctx->completion);
1106         atomic_inc(&ctx->configuring);
1107
1108         reset_sa_dir(&ctx->encrypt);
1109         reset_sa_dir(&ctx->decrypt);
1110
1111         ret = setup_cipher(&tfm->base, 0, ctx->enckey, ctx->enckey_len);
1112         if (ret)
1113                 goto out;
1114         ret = setup_cipher(&tfm->base, 1, ctx->enckey, ctx->enckey_len);
1115         if (ret)
1116                 goto out;
1117         ret = setup_auth(&tfm->base, 0, authsize, ctx->authkey,
1118                         ctx->authkey_len, digest_len);
1119         if (ret)
1120                 goto out;
1121         ret = setup_auth(&tfm->base, 1, authsize,  ctx->authkey,
1122                         ctx->authkey_len, digest_len);
1123         if (ret)
1124                 goto out;
1125
1126         if (*flags & CRYPTO_TFM_RES_WEAK_KEY) {
1127                 if (*flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS) {
1128                         ret = -EINVAL;
1129                         goto out;
1130                 } else {
1131                         *flags &= ~CRYPTO_TFM_RES_WEAK_KEY;
1132                 }
1133         }
1134 out:
1135         if (!atomic_dec_and_test(&ctx->configuring))
1136                 wait_for_completion(&ctx->completion);
1137         return ret;
1138 }
1139
1140 static int aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
1141 {
1142         int max = crypto_aead_maxauthsize(tfm) >> 2;
1143
1144         if ((authsize>>2) < 1 || (authsize>>2) > max || (authsize & 3))
1145                 return -EINVAL;
1146         return aead_setup(tfm, authsize);
1147 }
1148
1149 static int aead_setkey(struct crypto_aead *tfm, const u8 *key,
1150                         unsigned int keylen)
1151 {
1152         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1153         struct crypto_authenc_keys keys;
1154
1155         if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
1156                 goto badkey;
1157
1158         if (keys.authkeylen > sizeof(ctx->authkey))
1159                 goto badkey;
1160
1161         if (keys.enckeylen > sizeof(ctx->enckey))
1162                 goto badkey;
1163
1164         memcpy(ctx->authkey, keys.authkey, keys.authkeylen);
1165         memcpy(ctx->enckey, keys.enckey, keys.enckeylen);
1166         ctx->authkey_len = keys.authkeylen;
1167         ctx->enckey_len = keys.enckeylen;
1168
1169         memzero_explicit(&keys, sizeof(keys));
1170         return aead_setup(tfm, crypto_aead_authsize(tfm));
1171 badkey:
1172         crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
1173         memzero_explicit(&keys, sizeof(keys));
1174         return -EINVAL;
1175 }
1176
1177 static int des3_aead_setkey(struct crypto_aead *tfm, const u8 *key,
1178                             unsigned int keylen)
1179 {
1180         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1181         struct crypto_authenc_keys keys;
1182         int err;
1183
1184         err = crypto_authenc_extractkeys(&keys, key, keylen);
1185         if (unlikely(err))
1186                 goto badkey;
1187
1188         err = -EINVAL;
1189         if (keys.authkeylen > sizeof(ctx->authkey))
1190                 goto badkey;
1191
1192         err = verify_aead_des3_key(tfm, keys.enckey, keys.enckeylen);
1193         if (err)
1194                 goto badkey;
1195
1196         memcpy(ctx->authkey, keys.authkey, keys.authkeylen);
1197         memcpy(ctx->enckey, keys.enckey, keys.enckeylen);
1198         ctx->authkey_len = keys.authkeylen;
1199         ctx->enckey_len = keys.enckeylen;
1200
1201         memzero_explicit(&keys, sizeof(keys));
1202         return aead_setup(tfm, crypto_aead_authsize(tfm));
1203 badkey:
1204         memzero_explicit(&keys, sizeof(keys));
1205         return err;
1206 }
1207
1208 static int aead_encrypt(struct aead_request *req)
1209 {
1210         return aead_perform(req, 1, req->assoclen, req->cryptlen, req->iv);
1211 }
1212
1213 static int aead_decrypt(struct aead_request *req)
1214 {
1215         return aead_perform(req, 0, req->assoclen, req->cryptlen, req->iv);
1216 }
1217
1218 static struct ixp_alg ixp4xx_algos[] = {
1219 {
1220         .crypto = {
1221                 .base.cra_name          = "cbc(des)",
1222                 .base.cra_blocksize     = DES_BLOCK_SIZE,
1223
1224                 .min_keysize            = DES_KEY_SIZE,
1225                 .max_keysize            = DES_KEY_SIZE,
1226                 .ivsize                 = DES_BLOCK_SIZE,
1227         },
1228         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1229         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1230
1231 }, {
1232         .crypto = {
1233                 .base.cra_name          = "ecb(des)",
1234                 .base.cra_blocksize     = DES_BLOCK_SIZE,
1235                 .min_keysize            = DES_KEY_SIZE,
1236                 .max_keysize            = DES_KEY_SIZE,
1237         },
1238         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_ECB | KEYLEN_192,
1239         .cfg_dec = CIPH_DECR | MOD_DES | MOD_ECB | KEYLEN_192,
1240 }, {
1241         .crypto = {
1242                 .base.cra_name          = "cbc(des3_ede)",
1243                 .base.cra_blocksize     = DES3_EDE_BLOCK_SIZE,
1244
1245                 .min_keysize            = DES3_EDE_KEY_SIZE,
1246                 .max_keysize            = DES3_EDE_KEY_SIZE,
1247                 .ivsize                 = DES3_EDE_BLOCK_SIZE,
1248                 .setkey                 = ablk_des3_setkey,
1249         },
1250         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1251         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1252 }, {
1253         .crypto = {
1254                 .base.cra_name          = "ecb(des3_ede)",
1255                 .base.cra_blocksize     = DES3_EDE_BLOCK_SIZE,
1256
1257                 .min_keysize            = DES3_EDE_KEY_SIZE,
1258                 .max_keysize            = DES3_EDE_KEY_SIZE,
1259                 .setkey                 = ablk_des3_setkey,
1260         },
1261         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_ECB | KEYLEN_192,
1262         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_ECB | KEYLEN_192,
1263 }, {
1264         .crypto = {
1265                 .base.cra_name          = "cbc(aes)",
1266                 .base.cra_blocksize     = AES_BLOCK_SIZE,
1267
1268                 .min_keysize            = AES_MIN_KEY_SIZE,
1269                 .max_keysize            = AES_MAX_KEY_SIZE,
1270                 .ivsize                 = AES_BLOCK_SIZE,
1271         },
1272         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1273         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1274 }, {
1275         .crypto = {
1276                 .base.cra_name          = "ecb(aes)",
1277                 .base.cra_blocksize     = AES_BLOCK_SIZE,
1278
1279                 .min_keysize            = AES_MIN_KEY_SIZE,
1280                 .max_keysize            = AES_MAX_KEY_SIZE,
1281         },
1282         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_ECB,
1283         .cfg_dec = CIPH_DECR | MOD_AES | MOD_ECB,
1284 }, {
1285         .crypto = {
1286                 .base.cra_name          = "ctr(aes)",
1287                 .base.cra_blocksize     = 1,
1288
1289                 .min_keysize            = AES_MIN_KEY_SIZE,
1290                 .max_keysize            = AES_MAX_KEY_SIZE,
1291                 .ivsize                 = AES_BLOCK_SIZE,
1292         },
1293         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
1294         .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
1295 }, {
1296         .crypto = {
1297                 .base.cra_name          = "rfc3686(ctr(aes))",
1298                 .base.cra_blocksize     = 1,
1299
1300                 .min_keysize            = AES_MIN_KEY_SIZE,
1301                 .max_keysize            = AES_MAX_KEY_SIZE,
1302                 .ivsize                 = AES_BLOCK_SIZE,
1303                 .setkey                 = ablk_rfc3686_setkey,
1304                 .encrypt                = ablk_rfc3686_crypt,
1305                 .decrypt                = ablk_rfc3686_crypt,
1306         },
1307         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
1308         .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
1309 } };
1310
1311 static struct ixp_aead_alg ixp4xx_aeads[] = {
1312 {
1313         .crypto = {
1314                 .base = {
1315                         .cra_name       = "authenc(hmac(md5),cbc(des))",
1316                         .cra_blocksize  = DES_BLOCK_SIZE,
1317                 },
1318                 .ivsize         = DES_BLOCK_SIZE,
1319                 .maxauthsize    = MD5_DIGEST_SIZE,
1320         },
1321         .hash = &hash_alg_md5,
1322         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1323         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1324 }, {
1325         .crypto = {
1326                 .base = {
1327                         .cra_name       = "authenc(hmac(md5),cbc(des3_ede))",
1328                         .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1329                 },
1330                 .ivsize         = DES3_EDE_BLOCK_SIZE,
1331                 .maxauthsize    = MD5_DIGEST_SIZE,
1332                 .setkey         = des3_aead_setkey,
1333         },
1334         .hash = &hash_alg_md5,
1335         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1336         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1337 }, {
1338         .crypto = {
1339                 .base = {
1340                         .cra_name       = "authenc(hmac(sha1),cbc(des))",
1341                         .cra_blocksize  = DES_BLOCK_SIZE,
1342                 },
1343                         .ivsize         = DES_BLOCK_SIZE,
1344                         .maxauthsize    = SHA1_DIGEST_SIZE,
1345         },
1346         .hash = &hash_alg_sha1,
1347         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1348         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1349 }, {
1350         .crypto = {
1351                 .base = {
1352                         .cra_name       = "authenc(hmac(sha1),cbc(des3_ede))",
1353                         .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1354                 },
1355                 .ivsize         = DES3_EDE_BLOCK_SIZE,
1356                 .maxauthsize    = SHA1_DIGEST_SIZE,
1357                 .setkey         = des3_aead_setkey,
1358         },
1359         .hash = &hash_alg_sha1,
1360         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1361         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1362 }, {
1363         .crypto = {
1364                 .base = {
1365                         .cra_name       = "authenc(hmac(md5),cbc(aes))",
1366                         .cra_blocksize  = AES_BLOCK_SIZE,
1367                 },
1368                 .ivsize         = AES_BLOCK_SIZE,
1369                 .maxauthsize    = MD5_DIGEST_SIZE,
1370         },
1371         .hash = &hash_alg_md5,
1372         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1373         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1374 }, {
1375         .crypto = {
1376                 .base = {
1377                         .cra_name       = "authenc(hmac(sha1),cbc(aes))",
1378                         .cra_blocksize  = AES_BLOCK_SIZE,
1379                 },
1380                 .ivsize         = AES_BLOCK_SIZE,
1381                 .maxauthsize    = SHA1_DIGEST_SIZE,
1382         },
1383         .hash = &hash_alg_sha1,
1384         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1385         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1386 } };
1387
1388 #define IXP_POSTFIX "-ixp4xx"
1389
1390 static const struct platform_device_info ixp_dev_info __initdata = {
1391         .name           = DRIVER_NAME,
1392         .id             = 0,
1393         .dma_mask       = DMA_BIT_MASK(32),
1394 };
1395
1396 static int __init ixp_module_init(void)
1397 {
1398         int num = ARRAY_SIZE(ixp4xx_algos);
1399         int i, err;
1400
1401         pdev = platform_device_register_full(&ixp_dev_info);
1402         if (IS_ERR(pdev))
1403                 return PTR_ERR(pdev);
1404
1405         spin_lock_init(&desc_lock);
1406         spin_lock_init(&emerg_lock);
1407
1408         err = init_ixp_crypto(&pdev->dev);
1409         if (err) {
1410                 platform_device_unregister(pdev);
1411                 return err;
1412         }
1413         for (i=0; i< num; i++) {
1414                 struct skcipher_alg *cra = &ixp4xx_algos[i].crypto;
1415
1416                 if (snprintf(cra->base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
1417                         "%s"IXP_POSTFIX, cra->base.cra_name) >=
1418                         CRYPTO_MAX_ALG_NAME)
1419                 {
1420                         continue;
1421                 }
1422                 if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES)) {
1423                         continue;
1424                 }
1425
1426                 /* block ciphers */
1427                 cra->base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1428                                       CRYPTO_ALG_ASYNC;
1429                 if (!cra->setkey)
1430                         cra->setkey = ablk_setkey;
1431                 if (!cra->encrypt)
1432                         cra->encrypt = ablk_encrypt;
1433                 if (!cra->decrypt)
1434                         cra->decrypt = ablk_decrypt;
1435                 cra->init = init_tfm_ablk;
1436                 cra->exit = exit_tfm_ablk;
1437
1438                 cra->base.cra_ctxsize = sizeof(struct ixp_ctx);
1439                 cra->base.cra_module = THIS_MODULE;
1440                 cra->base.cra_alignmask = 3;
1441                 cra->base.cra_priority = 300;
1442                 if (crypto_register_skcipher(cra))
1443                         printk(KERN_ERR "Failed to register '%s'\n",
1444                                 cra->base.cra_name);
1445                 else
1446                         ixp4xx_algos[i].registered = 1;
1447         }
1448
1449         for (i = 0; i < ARRAY_SIZE(ixp4xx_aeads); i++) {
1450                 struct aead_alg *cra = &ixp4xx_aeads[i].crypto;
1451
1452                 if (snprintf(cra->base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
1453                              "%s"IXP_POSTFIX, cra->base.cra_name) >=
1454                     CRYPTO_MAX_ALG_NAME)
1455                         continue;
1456                 if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES))
1457                         continue;
1458
1459                 /* authenc */
1460                 cra->base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1461                                       CRYPTO_ALG_ASYNC;
1462                 cra->setkey = cra->setkey ?: aead_setkey;
1463                 cra->setauthsize = aead_setauthsize;
1464                 cra->encrypt = aead_encrypt;
1465                 cra->decrypt = aead_decrypt;
1466                 cra->init = init_tfm_aead;
1467                 cra->exit = exit_tfm_aead;
1468
1469                 cra->base.cra_ctxsize = sizeof(struct ixp_ctx);
1470                 cra->base.cra_module = THIS_MODULE;
1471                 cra->base.cra_alignmask = 3;
1472                 cra->base.cra_priority = 300;
1473
1474                 if (crypto_register_aead(cra))
1475                         printk(KERN_ERR "Failed to register '%s'\n",
1476                                 cra->base.cra_driver_name);
1477                 else
1478                         ixp4xx_aeads[i].registered = 1;
1479         }
1480         return 0;
1481 }
1482
1483 static void __exit ixp_module_exit(void)
1484 {
1485         int num = ARRAY_SIZE(ixp4xx_algos);
1486         int i;
1487
1488         for (i = 0; i < ARRAY_SIZE(ixp4xx_aeads); i++) {
1489                 if (ixp4xx_aeads[i].registered)
1490                         crypto_unregister_aead(&ixp4xx_aeads[i].crypto);
1491         }
1492
1493         for (i=0; i< num; i++) {
1494                 if (ixp4xx_algos[i].registered)
1495                         crypto_unregister_skcipher(&ixp4xx_algos[i].crypto);
1496         }
1497         release_ixp_crypto(&pdev->dev);
1498         platform_device_unregister(pdev);
1499 }
1500
1501 module_init(ixp_module_init);
1502 module_exit(ixp_module_exit);
1503
1504 MODULE_LICENSE("GPL");
1505 MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>");
1506 MODULE_DESCRIPTION("IXP4xx hardware crypto");
1507