drivers/crypto/ixp4xx_crypto.c

   1 /*
   2  * Intel IXP4xx NPE-C crypto driver
   3  *
   4  * Copyright (C) 2008 Christian Hohnstaedt <chohnstaedt@innominate.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of version 2 of the GNU General Public License
   8  * as published by the Free Software Foundation.
   9  *
  10  */
  11
  12 #include <linux/platform_device.h>
  13 #include <linux/dma-mapping.h>
  14 #include <linux/dmapool.h>
  15 #include <linux/crypto.h>
  16 #include <linux/kernel.h>
  17 #include <linux/rtnetlink.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/spinlock.h>
  20 #include <linux/gfp.h>
  21 #include <linux/module.h>
  22
  23 #include <crypto/ctr.h>
  24 #include <crypto/des.h>
  25 #include <crypto/aes.h>
  26 #include <crypto/hmac.h>
  27 #include <crypto/sha.h>
  28 #include <crypto/algapi.h>
  29 #include <crypto/internal/aead.h>
  30 #include <crypto/authenc.h>
  31 #include <crypto/scatterwalk.h>
  32
  33 #include <mach/npe.h>
  34 #include <mach/qmgr.h>
  35
  36 #define MAX_KEYLEN 32
  37
  38 /* hash: cfgword + 2 * digestlen; crypt: keylen + cfgword */
  39 #define NPE_CTX_LEN 80
  40 #define AES_BLOCK128 16
  41
  42 #define NPE_OP_HASH_VERIFY   0x01
  43 #define NPE_OP_CCM_ENABLE    0x04
  44 #define NPE_OP_CRYPT_ENABLE  0x08
  45 #define NPE_OP_HASH_ENABLE   0x10
  46 #define NPE_OP_NOT_IN_PLACE  0x20
  47 #define NPE_OP_HMAC_DISABLE  0x40
  48 #define NPE_OP_CRYPT_ENCRYPT 0x80
  49
  50 #define NPE_OP_CCM_GEN_MIC   0xcc
  51 #define NPE_OP_HASH_GEN_ICV  0x50
  52 #define NPE_OP_ENC_GEN_KEY   0xc9
  53
  54 #define MOD_ECB     0x0000
  55 #define MOD_CTR     0x1000
  56 #define MOD_CBC_ENC 0x2000
  57 #define MOD_CBC_DEC 0x3000
  58 #define MOD_CCM_ENC 0x4000
  59 #define MOD_CCM_DEC 0x5000
  60
  61 #define KEYLEN_128  4
  62 #define KEYLEN_192  6
  63 #define KEYLEN_256  8
  64
  65 #define CIPH_DECR   0x0000
  66 #define CIPH_ENCR   0x0400
  67
  68 #define MOD_DES     0x0000
  69 #define MOD_TDEA2   0x0100
  70 #define MOD_3DES   0x0200
  71 #define MOD_AES     0x0800
  72 #define MOD_AES128  (0x0800 | KEYLEN_128)
  73 #define MOD_AES192  (0x0900 | KEYLEN_192)
  74 #define MOD_AES256  (0x0a00 | KEYLEN_256)
  75
  76 #define MAX_IVLEN   16
  77 #define NPE_ID      2  /* NPE C */
  78 #define NPE_QLEN    16
  79 /* Space for registering when the first
  80  * NPE_QLEN crypt_ctl are busy */
  81 #define NPE_QLEN_TOTAL 64
  82
  83 #define SEND_QID    29
  84 #define RECV_QID    30
  85
  86 #define CTL_FLAG_UNUSED         0x0000
  87 #define CTL_FLAG_USED           0x1000
  88 #define CTL_FLAG_PERFORM_ABLK   0x0001
  89 #define CTL_FLAG_GEN_ICV        0x0002
  90 #define CTL_FLAG_GEN_REVAES     0x0004
  91 #define CTL_FLAG_PERFORM_AEAD   0x0008
  92 #define CTL_FLAG_MASK           0x000f
  93
  94 #define HMAC_PAD_BLOCKLEN SHA1_BLOCK_SIZE
  95
  96 #define MD5_DIGEST_SIZE   16
  97
  98 struct buffer_desc {
  99         u32 phys_next;
 100 #ifdef __ARMEB__
 101         u16 buf_len;
 102         u16 pkt_len;
 103 #else
 104         u16 pkt_len;
 105         u16 buf_len;
 106 #endif
 107         u32 phys_addr;
 108         u32 __reserved[4];
 109         struct buffer_desc *next;
 110         enum dma_data_direction dir;
 111 };
 112
 113 struct crypt_ctl {
 114 #ifdef __ARMEB__
 115         u8 mode;                /* NPE_OP_*  operation mode */
 116         u8 init_len;
 117         u16 reserved;
 118 #else
 119         u16 reserved;
 120         u8 init_len;
 121         u8 mode;                /* NPE_OP_*  operation mode */
 122 #endif
 123         u8 iv[MAX_IVLEN];       /* IV for CBC mode or CTR IV for CTR mode */
 124         u32 icv_rev_aes;        /* icv or rev aes */
 125         u32 src_buf;
 126         u32 dst_buf;
 127 #ifdef __ARMEB__
 128         u16 auth_offs;          /* Authentication start offset */
 129         u16 auth_len;           /* Authentication data length */
 130         u16 crypt_offs;         /* Cryption start offset */
 131         u16 crypt_len;          /* Cryption data length */
 132 #else
 133         u16 auth_len;           /* Authentication data length */
 134         u16 auth_offs;          /* Authentication start offset */
 135         u16 crypt_len;          /* Cryption data length */
 136         u16 crypt_offs;         /* Cryption start offset */
 137 #endif
 138         u32 aadAddr;            /* Additional Auth Data Addr for CCM mode */
 139         u32 crypto_ctx;         /* NPE Crypto Param structure address */
 140
 141         /* Used by Host: 4*4 bytes*/
 142         unsigned ctl_flags;
 143         union {
 144                 struct ablkcipher_request *ablk_req;
 145                 struct aead_request *aead_req;
 146                 struct crypto_tfm *tfm;
 147         } data;
 148         struct buffer_desc *regist_buf;
 149         u8 *regist_ptr;
 150 };
 151
 152 struct ablk_ctx {
 153         struct buffer_desc *src;
 154         struct buffer_desc *dst;
 155 };
 156
 157 struct aead_ctx {
 158         struct buffer_desc *src;
 159         struct buffer_desc *dst;
 160         struct scatterlist ivlist;
 161         /* used when the hmac is not on one sg entry */
 162         u8 *hmac_virt;
 163         int encrypt;
 164 };
 165
 166 struct ix_hash_algo {
 167         u32 cfgword;
 168         unsigned char *icv;
 169 };
 170
 171 struct ix_sa_dir {
 172         unsigned char *npe_ctx;
 173         dma_addr_t npe_ctx_phys;
 174         int npe_ctx_idx;
 175         u8 npe_mode;
 176 };
 177
 178 struct ixp_ctx {
 179         struct ix_sa_dir encrypt;
 180         struct ix_sa_dir decrypt;
 181         int authkey_len;
 182         u8 authkey[MAX_KEYLEN];
 183         int enckey_len;
 184         u8 enckey[MAX_KEYLEN];
 185         u8 salt[MAX_IVLEN];
 186         u8 nonce[CTR_RFC3686_NONCE_SIZE];
 187         unsigned salted;
 188         atomic_t configuring;
 189         struct completion completion;
 190 };
 191
 192 struct ixp_alg {
 193         struct crypto_alg crypto;
 194         const struct ix_hash_algo *hash;
 195         u32 cfg_enc;
 196         u32 cfg_dec;
 197
 198         int registered;
 199 };
 200
 201 struct ixp_aead_alg {
 202         struct aead_alg crypto;
 203         const struct ix_hash_algo *hash;
 204         u32 cfg_enc;
 205         u32 cfg_dec;
 206
 207         int registered;
 208 };
 209
 210 static const struct ix_hash_algo hash_alg_md5 = {
 211         .cfgword        = 0xAA010004,
 212         .icv            = "\x01\x23\x45\x67\x89\xAB\xCD\xEF"
 213                           "\xFE\xDC\xBA\x98\x76\x54\x32\x10",
 214 };
 215 static const struct ix_hash_algo hash_alg_sha1 = {
 216         .cfgword        = 0x00000005,
 217         .icv            = "\x67\x45\x23\x01\xEF\xCD\xAB\x89\x98\xBA"
 218                           "\xDC\xFE\x10\x32\x54\x76\xC3\xD2\xE1\xF0",
 219 };
 220
 221 static struct npe *npe_c;
 222 static struct dma_pool *buffer_pool = NULL;
 223 static struct dma_pool *ctx_pool = NULL;
 224
 225 static struct crypt_ctl *crypt_virt = NULL;
 226 static dma_addr_t crypt_phys;
 227
 228 static int support_aes = 1;
 229
 230 #define DRIVER_NAME "ixp4xx_crypto"
 231
 232 static struct platform_device *pdev;
 233
 234 static inline dma_addr_t crypt_virt2phys(struct crypt_ctl *virt)
 235 {
 236         return crypt_phys + (virt - crypt_virt) * sizeof(struct crypt_ctl);
 237 }
 238
 239 static inline struct crypt_ctl *crypt_phys2virt(dma_addr_t phys)
 240 {
 241         return crypt_virt + (phys - crypt_phys) / sizeof(struct crypt_ctl);
 242 }
 243
 244 static inline u32 cipher_cfg_enc(struct crypto_tfm *tfm)
 245 {
 246         return container_of(tfm->__crt_alg, struct ixp_alg,crypto)->cfg_enc;
 247 }
 248
 249 static inline u32 cipher_cfg_dec(struct crypto_tfm *tfm)
 250 {
 251         return container_of(tfm->__crt_alg, struct ixp_alg,crypto)->cfg_dec;
 252 }
 253
 254 static inline const struct ix_hash_algo *ix_hash(struct crypto_tfm *tfm)
 255 {
 256         return container_of(tfm->__crt_alg, struct ixp_alg, crypto)->hash;
 257 }
 258
 259 static int setup_crypt_desc(void)
 260 {
 261         struct device *dev = &pdev->dev;
 262         BUILD_BUG_ON(sizeof(struct crypt_ctl) != 64);
 263         crypt_virt = dma_alloc_coherent(dev,
 264                                         NPE_QLEN * sizeof(struct crypt_ctl),
 265                                         &crypt_phys, GFP_ATOMIC);
 266         if (!crypt_virt)
 267                 return -ENOMEM;
 268         return 0;
 269 }
 270
 271 static spinlock_t desc_lock;
 272 static struct crypt_ctl *get_crypt_desc(void)
 273 {
 274         int i;
 275         static int idx = 0;
 276         unsigned long flags;
 277
 278         spin_lock_irqsave(&desc_lock, flags);
 279
 280         if (unlikely(!crypt_virt))
 281                 setup_crypt_desc();
 282         if (unlikely(!crypt_virt)) {
 283                 spin_unlock_irqrestore(&desc_lock, flags);
 284                 return NULL;
 285         }
 286         i = idx;
 287         if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
 288                 if (++idx >= NPE_QLEN)
 289                         idx = 0;
 290                 crypt_virt[i].ctl_flags = CTL_FLAG_USED;
 291                 spin_unlock_irqrestore(&desc_lock, flags);
 292                 return crypt_virt +i;
 293         } else {
 294                 spin_unlock_irqrestore(&desc_lock, flags);
 295                 return NULL;
 296         }
 297 }
 298
 299 static spinlock_t emerg_lock;
 300 static struct crypt_ctl *get_crypt_desc_emerg(void)
 301 {
 302         int i;
 303         static int idx = NPE_QLEN;
 304         struct crypt_ctl *desc;
 305         unsigned long flags;
 306
 307         desc = get_crypt_desc();
 308         if (desc)
 309                 return desc;
 310         if (unlikely(!crypt_virt))
 311                 return NULL;
 312
 313         spin_lock_irqsave(&emerg_lock, flags);
 314         i = idx;
 315         if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
 316                 if (++idx >= NPE_QLEN_TOTAL)
 317                         idx = NPE_QLEN;
 318                 crypt_virt[i].ctl_flags = CTL_FLAG_USED;
 319                 spin_unlock_irqrestore(&emerg_lock, flags);
 320                 return crypt_virt +i;
 321         } else {
 322                 spin_unlock_irqrestore(&emerg_lock, flags);
 323                 return NULL;
 324         }
 325 }
 326
 327 static void free_buf_chain(struct device *dev, struct buffer_desc *buf,u32 phys)
 328 {
 329         while (buf) {
 330                 struct buffer_desc *buf1;
 331                 u32 phys1;
 332
 333                 buf1 = buf->next;
 334                 phys1 = buf->phys_next;
 335                 dma_unmap_single(dev, buf->phys_next, buf->buf_len, buf->dir);
 336                 dma_pool_free(buffer_pool, buf, phys);
 337                 buf = buf1;
 338                 phys = phys1;
 339         }
 340 }
 341
 342 static struct tasklet_struct crypto_done_tasklet;
 343
 344 static void finish_scattered_hmac(struct crypt_ctl *crypt)
 345 {
 346         struct aead_request *req = crypt->data.aead_req;
 347         struct aead_ctx *req_ctx = aead_request_ctx(req);
 348         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 349         int authsize = crypto_aead_authsize(tfm);
 350         int decryptlen = req->assoclen + req->cryptlen - authsize;
 351
 352         if (req_ctx->encrypt) {
 353                 scatterwalk_map_and_copy(req_ctx->hmac_virt,
 354                         req->dst, decryptlen, authsize, 1);
 355         }
 356         dma_pool_free(buffer_pool, req_ctx->hmac_virt, crypt->icv_rev_aes);
 357 }
 358
 359 static void one_packet(dma_addr_t phys)
 360 {
 361         struct device *dev = &pdev->dev;
 362         struct crypt_ctl *crypt;
 363         struct ixp_ctx *ctx;
 364         int failed;
 365
 366         failed = phys & 0x1 ? -EBADMSG : 0;
 367         phys &= ~0x3;
 368         crypt = crypt_phys2virt(phys);
 369
 370         switch (crypt->ctl_flags & CTL_FLAG_MASK) {
 371         case CTL_FLAG_PERFORM_AEAD: {
 372                 struct aead_request *req = crypt->data.aead_req;
 373                 struct aead_ctx *req_ctx = aead_request_ctx(req);
 374
 375                 free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 376                 free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 377                 if (req_ctx->hmac_virt) {
 378                         finish_scattered_hmac(crypt);
 379                 }
 380                 req->base.complete(&req->base, failed);
 381                 break;
 382         }
 383         case CTL_FLAG_PERFORM_ABLK: {
 384                 struct ablkcipher_request *req = crypt->data.ablk_req;
 385                 struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req);
 386
 387                 if (req_ctx->dst) {
 388                         free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 389                 }
 390                 free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 391                 req->base.complete(&req->base, failed);
 392                 break;
 393         }
 394         case CTL_FLAG_GEN_ICV:
 395                 ctx = crypto_tfm_ctx(crypt->data.tfm);
 396                 dma_pool_free(ctx_pool, crypt->regist_ptr,
 397                                 crypt->regist_buf->phys_addr);
 398                 dma_pool_free(buffer_pool, crypt->regist_buf, crypt->src_buf);
 399                 if (atomic_dec_and_test(&ctx->configuring))
 400                         complete(&ctx->completion);
 401                 break;
 402         case CTL_FLAG_GEN_REVAES:
 403                 ctx = crypto_tfm_ctx(crypt->data.tfm);
 404                 *(u32*)ctx->decrypt.npe_ctx &= cpu_to_be32(~CIPH_ENCR);
 405                 if (atomic_dec_and_test(&ctx->configuring))
 406                         complete(&ctx->completion);
 407                 break;
 408         default:
 409                 BUG();
 410         }
 411         crypt->ctl_flags = CTL_FLAG_UNUSED;
 412 }
 413
 414 static void irqhandler(void *_unused)
 415 {
 416         tasklet_schedule(&crypto_done_tasklet);
 417 }
 418
 419 static void crypto_done_action(unsigned long arg)
 420 {
 421         int i;
 422
 423         for(i=0; i<4; i++) {
 424                 dma_addr_t phys = qmgr_get_entry(RECV_QID);
 425                 if (!phys)
 426                         return;
 427                 one_packet(phys);
 428         }
 429         tasklet_schedule(&crypto_done_tasklet);
 430 }
 431
 432 static int init_ixp_crypto(struct device *dev)
 433 {
 434         int ret = -ENODEV;
 435         u32 msg[2] = { 0, 0 };
 436
 437         if (! ( ~(*IXP4XX_EXP_CFG2) & (IXP4XX_FEATURE_HASH |
 438                                 IXP4XX_FEATURE_AES | IXP4XX_FEATURE_DES))) {
 439                 printk(KERN_ERR "ixp_crypto: No HW crypto available\n");
 440                 return ret;
 441         }
 442         npe_c = npe_request(NPE_ID);
 443         if (!npe_c)
 444                 return ret;
 445
 446         if (!npe_running(npe_c)) {
 447                 ret = npe_load_firmware(npe_c, npe_name(npe_c), dev);
 448                 if (ret)
 449                         goto npe_release;
 450                 if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
 451                         goto npe_error;
 452         } else {
 453                 if (npe_send_message(npe_c, msg, "STATUS_MSG"))
 454                         goto npe_error;
 455
 456                 if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
 457                         goto npe_error;
 458         }
 459
 460         switch ((msg[1]>>16) & 0xff) {
 461         case 3:
 462                 printk(KERN_WARNING "Firmware of %s lacks AES support\n",
 463                                 npe_name(npe_c));
 464                 support_aes = 0;
 465                 break;
 466         case 4:
 467         case 5:
 468                 support_aes = 1;
 469                 break;
 470         default:
 471                 printk(KERN_ERR "Firmware of %s lacks crypto support\n",
 472                         npe_name(npe_c));
 473                 ret = -ENODEV;
 474                 goto npe_release;
 475         }
 476         /* buffer_pool will also be used to sometimes store the hmac,
 477          * so assure it is large enough
 478          */
 479         BUILD_BUG_ON(SHA1_DIGEST_SIZE > sizeof(struct buffer_desc));
 480         buffer_pool = dma_pool_create("buffer", dev,
 481                         sizeof(struct buffer_desc), 32, 0);
 482         ret = -ENOMEM;
 483         if (!buffer_pool) {
 484                 goto err;
 485         }
 486         ctx_pool = dma_pool_create("context", dev,
 487                         NPE_CTX_LEN, 16, 0);
 488         if (!ctx_pool) {
 489                 goto err;
 490         }
 491         ret = qmgr_request_queue(SEND_QID, NPE_QLEN_TOTAL, 0, 0,
 492                                  "ixp_crypto:out", NULL);
 493         if (ret)
 494                 goto err;
 495         ret = qmgr_request_queue(RECV_QID, NPE_QLEN, 0, 0,
 496                                  "ixp_crypto:in", NULL);
 497         if (ret) {
 498                 qmgr_release_queue(SEND_QID);
 499                 goto err;
 500         }
 501         qmgr_set_irq(RECV_QID, QUEUE_IRQ_SRC_NOT_EMPTY, irqhandler, NULL);
 502         tasklet_init(&crypto_done_tasklet, crypto_done_action, 0);
 503
 504         qmgr_enable_irq(RECV_QID);
 505         return 0;
 506
 507 npe_error:
 508         printk(KERN_ERR "%s not responding\n", npe_name(npe_c));
 509         ret = -EIO;
 510 err:
 511         dma_pool_destroy(ctx_pool);
 512         dma_pool_destroy(buffer_pool);
 513 npe_release:
 514         npe_release(npe_c);
 515         return ret;
 516 }
 517
 518 static void release_ixp_crypto(struct device *dev)
 519 {
 520         qmgr_disable_irq(RECV_QID);
 521         tasklet_kill(&crypto_done_tasklet);
 522
 523         qmgr_release_queue(SEND_QID);
 524         qmgr_release_queue(RECV_QID);
 525
 526         dma_pool_destroy(ctx_pool);
 527         dma_pool_destroy(buffer_pool);
 528
 529         npe_release(npe_c);
 530
 531         if (crypt_virt) {
 532                 dma_free_coherent(dev,
 533                         NPE_QLEN_TOTAL * sizeof( struct crypt_ctl),
 534                         crypt_virt, crypt_phys);
 535         }
 536 }
 537
 538 static void reset_sa_dir(struct ix_sa_dir *dir)
 539 {
 540         memset(dir->npe_ctx, 0, NPE_CTX_LEN);
 541         dir->npe_ctx_idx = 0;
 542         dir->npe_mode = 0;
 543 }
 544
 545 static int init_sa_dir(struct ix_sa_dir *dir)
 546 {
 547         dir->npe_ctx = dma_pool_alloc(ctx_pool, GFP_KERNEL, &dir->npe_ctx_phys);
 548         if (!dir->npe_ctx) {
 549                 return -ENOMEM;
 550         }
 551         reset_sa_dir(dir);
 552         return 0;
 553 }
 554
 555 static void free_sa_dir(struct ix_sa_dir *dir)
 556 {
 557         memset(dir->npe_ctx, 0, NPE_CTX_LEN);
 558         dma_pool_free(ctx_pool, dir->npe_ctx, dir->npe_ctx_phys);
 559 }
 560
 561 static int init_tfm(struct crypto_tfm *tfm)
 562 {
 563         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 564         int ret;
 565
 566         atomic_set(&ctx->configuring, 0);
 567         ret = init_sa_dir(&ctx->encrypt);
 568         if (ret)
 569                 return ret;
 570         ret = init_sa_dir(&ctx->decrypt);
 571         if (ret) {
 572                 free_sa_dir(&ctx->encrypt);
 573         }
 574         return ret;
 575 }
 576
 577 static int init_tfm_ablk(struct crypto_tfm *tfm)
 578 {
 579         tfm->crt_ablkcipher.reqsize = sizeof(struct ablk_ctx);
 580         return init_tfm(tfm);
 581 }
 582
 583 static int init_tfm_aead(struct crypto_aead *tfm)
 584 {
 585         crypto_aead_set_reqsize(tfm, sizeof(struct aead_ctx));
 586         return init_tfm(crypto_aead_tfm(tfm));
 587 }
 588
 589 static void exit_tfm(struct crypto_tfm *tfm)
 590 {
 591         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 592         free_sa_dir(&ctx->encrypt);
 593         free_sa_dir(&ctx->decrypt);
 594 }
 595
 596 static void exit_tfm_aead(struct crypto_aead *tfm)
 597 {
 598         exit_tfm(crypto_aead_tfm(tfm));
 599 }
 600
 601 static int register_chain_var(struct crypto_tfm *tfm, u8 xpad, u32 target,
 602                 int init_len, u32 ctx_addr, const u8 *key, int key_len)
 603 {
 604         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 605         struct crypt_ctl *crypt;
 606         struct buffer_desc *buf;
 607         int i;
 608         u8 *pad;
 609         u32 pad_phys, buf_phys;
 610
 611         BUILD_BUG_ON(NPE_CTX_LEN < HMAC_PAD_BLOCKLEN);
 612         pad = dma_pool_alloc(ctx_pool, GFP_KERNEL, &pad_phys);
 613         if (!pad)
 614                 return -ENOMEM;
 615         buf = dma_pool_alloc(buffer_pool, GFP_KERNEL, &buf_phys);
 616         if (!buf) {
 617                 dma_pool_free(ctx_pool, pad, pad_phys);
 618                 return -ENOMEM;
 619         }
 620         crypt = get_crypt_desc_emerg();
 621         if (!crypt) {
 622                 dma_pool_free(ctx_pool, pad, pad_phys);
 623                 dma_pool_free(buffer_pool, buf, buf_phys);
 624                 return -EAGAIN;
 625         }
 626
 627         memcpy(pad, key, key_len);
 628         memset(pad + key_len, 0, HMAC_PAD_BLOCKLEN - key_len);
 629         for (i = 0; i < HMAC_PAD_BLOCKLEN; i++) {
 630                 pad[i] ^= xpad;
 631         }
 632
 633         crypt->data.tfm = tfm;
 634         crypt->regist_ptr = pad;
 635         crypt->regist_buf = buf;
 636
 637         crypt->auth_offs = 0;
 638         crypt->auth_len = HMAC_PAD_BLOCKLEN;
 639         crypt->crypto_ctx = ctx_addr;
 640         crypt->src_buf = buf_phys;
 641         crypt->icv_rev_aes = target;
 642         crypt->mode = NPE_OP_HASH_GEN_ICV;
 643         crypt->init_len = init_len;
 644         crypt->ctl_flags |= CTL_FLAG_GEN_ICV;
 645
 646         buf->next = 0;
 647         buf->buf_len = HMAC_PAD_BLOCKLEN;
 648         buf->pkt_len = 0;
 649         buf->phys_addr = pad_phys;
 650
 651         atomic_inc(&ctx->configuring);
 652         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 653         BUG_ON(qmgr_stat_overflow(SEND_QID));
 654         return 0;
 655 }
 656
 657 static int setup_auth(struct crypto_tfm *tfm, int encrypt, unsigned authsize,
 658                 const u8 *key, int key_len, unsigned digest_len)
 659 {
 660         u32 itarget, otarget, npe_ctx_addr;
 661         unsigned char *cinfo;
 662         int init_len, ret = 0;
 663         u32 cfgword;
 664         struct ix_sa_dir *dir;
 665         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 666         const struct ix_hash_algo *algo;
 667
 668         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 669         cinfo = dir->npe_ctx + dir->npe_ctx_idx;
 670         algo = ix_hash(tfm);
 671
 672         /* write cfg word to cryptinfo */
 673         cfgword = algo->cfgword | ( authsize << 6); /* (authsize/4) << 8 */
 674 #ifndef __ARMEB__
 675         cfgword ^= 0xAA000000; /* change the "byte swap" flags */
 676 #endif
 677         *(u32*)cinfo = cpu_to_be32(cfgword);
 678         cinfo += sizeof(cfgword);
 679
 680         /* write ICV to cryptinfo */
 681         memcpy(cinfo, algo->icv, digest_len);
 682         cinfo += digest_len;
 683
 684         itarget = dir->npe_ctx_phys + dir->npe_ctx_idx
 685                                 + sizeof(algo->cfgword);
 686         otarget = itarget + digest_len;
 687         init_len = cinfo - (dir->npe_ctx + dir->npe_ctx_idx);
 688         npe_ctx_addr = dir->npe_ctx_phys + dir->npe_ctx_idx;
 689
 690         dir->npe_ctx_idx += init_len;
 691         dir->npe_mode |= NPE_OP_HASH_ENABLE;
 692
 693         if (!encrypt)
 694                 dir->npe_mode |= NPE_OP_HASH_VERIFY;
 695
 696         ret = register_chain_var(tfm, HMAC_OPAD_VALUE, otarget,
 697                         init_len, npe_ctx_addr, key, key_len);
 698         if (ret)
 699                 return ret;
 700         return register_chain_var(tfm, HMAC_IPAD_VALUE, itarget,
 701                         init_len, npe_ctx_addr, key, key_len);
 702 }
 703
 704 static int gen_rev_aes_key(struct crypto_tfm *tfm)
 705 {
 706         struct crypt_ctl *crypt;
 707         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 708         struct ix_sa_dir *dir = &ctx->decrypt;
 709
 710         crypt = get_crypt_desc_emerg();
 711         if (!crypt) {
 712                 return -EAGAIN;
 713         }
 714         *(u32*)dir->npe_ctx |= cpu_to_be32(CIPH_ENCR);
 715
 716         crypt->data.tfm = tfm;
 717         crypt->crypt_offs = 0;
 718         crypt->crypt_len = AES_BLOCK128;
 719         crypt->src_buf = 0;
 720         crypt->crypto_ctx = dir->npe_ctx_phys;
 721         crypt->icv_rev_aes = dir->npe_ctx_phys + sizeof(u32);
 722         crypt->mode = NPE_OP_ENC_GEN_KEY;
 723         crypt->init_len = dir->npe_ctx_idx;
 724         crypt->ctl_flags |= CTL_FLAG_GEN_REVAES;
 725
 726         atomic_inc(&ctx->configuring);
 727         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 728         BUG_ON(qmgr_stat_overflow(SEND_QID));
 729         return 0;
 730 }
 731
 732 static int setup_cipher(struct crypto_tfm *tfm, int encrypt,
 733                 const u8 *key, int key_len)
 734 {
 735         u8 *cinfo;
 736         u32 cipher_cfg;
 737         u32 keylen_cfg = 0;
 738         struct ix_sa_dir *dir;
 739         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 740         u32 *flags = &tfm->crt_flags;
 741
 742         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 743         cinfo = dir->npe_ctx;
 744
 745         if (encrypt) {
 746                 cipher_cfg = cipher_cfg_enc(tfm);
 747                 dir->npe_mode |= NPE_OP_CRYPT_ENCRYPT;
 748         } else {
 749                 cipher_cfg = cipher_cfg_dec(tfm);
 750         }
 751         if (cipher_cfg & MOD_AES) {
 752                 switch (key_len) {
 753                 case 16: keylen_cfg = MOD_AES128; break;
 754                 case 24: keylen_cfg = MOD_AES192; break;
 755                 case 32: keylen_cfg = MOD_AES256; break;
 756                 default:
 757                         *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
 758                         return -EINVAL;
 759                 }
 760                 cipher_cfg |= keylen_cfg;
 761         } else {
 762                 u32 tmp[DES_EXPKEY_WORDS];
 763                 if (des_ekey(tmp, key) == 0) {
 764                         *flags |= CRYPTO_TFM_RES_WEAK_KEY;
 765                 }
 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                 u32 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_ablkcipher *tfm, const u8 *key,
 819                         unsigned int key_len)
 820 {
 821         struct ixp_ctx *ctx = crypto_ablkcipher_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_ablkcipher *tfm, const u8 *key,
 855                             unsigned int key_len)
 856 {
 857         u32 flags = crypto_ablkcipher_get_flags(tfm);
 858         int err;
 859
 860         err = __des3_verify_key(&flags, key);
 861         if (unlikely(err))
 862                 crypto_ablkcipher_set_flags(tfm, flags);
 863
 864         return ablk_setkey(tfm, key, key_len);
 865 }
 866
 867 static int ablk_rfc3686_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
 868                 unsigned int key_len)
 869 {
 870         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 871
 872         /* the nonce is stored in bytes at end of key */
 873         if (key_len < CTR_RFC3686_NONCE_SIZE)
 874                 return -EINVAL;
 875
 876         memcpy(ctx->nonce, key + (key_len - CTR_RFC3686_NONCE_SIZE),
 877                         CTR_RFC3686_NONCE_SIZE);
 878
 879         key_len -= CTR_RFC3686_NONCE_SIZE;
 880         return ablk_setkey(tfm, key, key_len);
 881 }
 882
 883 static int ablk_perform(struct ablkcipher_request *req, int encrypt)
 884 {
 885         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 886         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 887         unsigned ivsize = crypto_ablkcipher_ivsize(tfm);
 888         struct ix_sa_dir *dir;
 889         struct crypt_ctl *crypt;
 890         unsigned int nbytes = req->nbytes;
 891         enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
 892         struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req);
 893         struct buffer_desc src_hook;
 894         struct device *dev = &pdev->dev;
 895         gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
 896                                 GFP_KERNEL : GFP_ATOMIC;
 897
 898         if (qmgr_stat_full(SEND_QID))
 899                 return -EAGAIN;
 900         if (atomic_read(&ctx->configuring))
 901                 return -EAGAIN;
 902
 903         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 904
 905         crypt = get_crypt_desc();
 906         if (!crypt)
 907                 return -ENOMEM;
 908
 909         crypt->data.ablk_req = req;
 910         crypt->crypto_ctx = dir->npe_ctx_phys;
 911         crypt->mode = dir->npe_mode;
 912         crypt->init_len = dir->npe_ctx_idx;
 913
 914         crypt->crypt_offs = 0;
 915         crypt->crypt_len = nbytes;
 916
 917         BUG_ON(ivsize && !req->info);
 918         memcpy(crypt->iv, req->info, ivsize);
 919         if (req->src != req->dst) {
 920                 struct buffer_desc dst_hook;
 921                 crypt->mode |= NPE_OP_NOT_IN_PLACE;
 922                 /* This was never tested by Intel
 923                  * for more than one dst buffer, I think. */
 924                 req_ctx->dst = NULL;
 925                 if (!chainup_buffers(dev, req->dst, nbytes, &dst_hook,
 926                                         flags, DMA_FROM_DEVICE))
 927                         goto free_buf_dest;
 928                 src_direction = DMA_TO_DEVICE;
 929                 req_ctx->dst = dst_hook.next;
 930                 crypt->dst_buf = dst_hook.phys_next;
 931         } else {
 932                 req_ctx->dst = NULL;
 933         }
 934         req_ctx->src = NULL;
 935         if (!chainup_buffers(dev, req->src, nbytes, &src_hook,
 936                                 flags, src_direction))
 937                 goto free_buf_src;
 938
 939         req_ctx->src = src_hook.next;
 940         crypt->src_buf = src_hook.phys_next;
 941         crypt->ctl_flags |= CTL_FLAG_PERFORM_ABLK;
 942         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 943         BUG_ON(qmgr_stat_overflow(SEND_QID));
 944         return -EINPROGRESS;
 945
 946 free_buf_src:
 947         free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 948 free_buf_dest:
 949         if (req->src != req->dst) {
 950                 free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 951         }
 952         crypt->ctl_flags = CTL_FLAG_UNUSED;
 953         return -ENOMEM;
 954 }
 955
 956 static int ablk_encrypt(struct ablkcipher_request *req)
 957 {
 958         return ablk_perform(req, 1);
 959 }
 960
 961 static int ablk_decrypt(struct ablkcipher_request *req)
 962 {
 963         return ablk_perform(req, 0);
 964 }
 965
 966 static int ablk_rfc3686_crypt(struct ablkcipher_request *req)
 967 {
 968         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 969         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 970         u8 iv[CTR_RFC3686_BLOCK_SIZE];
 971         u8 *info = req->info;
 972         int ret;
 973
 974         /* set up counter block */
 975         memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE);
 976         memcpy(iv + CTR_RFC3686_NONCE_SIZE, info, CTR_RFC3686_IV_SIZE);
 977
 978         /* initialize counter portion of counter block */
 979         *(__be32 *)(iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) =
 980                 cpu_to_be32(1);
 981
 982         req->info = iv;
 983         ret = ablk_perform(req, 1);
 984         req->info = info;
 985         return ret;
 986 }
 987
 988 static int aead_perform(struct aead_request *req, int encrypt,
 989                 int cryptoffset, int eff_cryptlen, u8 *iv)
 990 {
 991         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 992         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
 993         unsigned ivsize = crypto_aead_ivsize(tfm);
 994         unsigned authsize = crypto_aead_authsize(tfm);
 995         struct ix_sa_dir *dir;
 996         struct crypt_ctl *crypt;
 997         unsigned int cryptlen;
 998         struct buffer_desc *buf, src_hook;
 999         struct aead_ctx *req_ctx = aead_request_ctx(req);
1000         struct device *dev = &pdev->dev;
1001         gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
1002                                 GFP_KERNEL : GFP_ATOMIC;
1003         enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
1004         unsigned int lastlen;
1005
1006         if (qmgr_stat_full(SEND_QID))
1007                 return -EAGAIN;
1008         if (atomic_read(&ctx->configuring))
1009                 return -EAGAIN;
1010
1011         if (encrypt) {
1012                 dir = &ctx->encrypt;
1013                 cryptlen = req->cryptlen;
1014         } else {
1015                 dir = &ctx->decrypt;
1016                 /* req->cryptlen includes the authsize when decrypting */
1017                 cryptlen = req->cryptlen -authsize;
1018                 eff_cryptlen -= authsize;
1019         }
1020         crypt = get_crypt_desc();
1021         if (!crypt)
1022                 return -ENOMEM;
1023
1024         crypt->data.aead_req = req;
1025         crypt->crypto_ctx = dir->npe_ctx_phys;
1026         crypt->mode = dir->npe_mode;
1027         crypt->init_len = dir->npe_ctx_idx;
1028
1029         crypt->crypt_offs = cryptoffset;
1030         crypt->crypt_len = eff_cryptlen;
1031
1032         crypt->auth_offs = 0;
1033         crypt->auth_len = req->assoclen + cryptlen;
1034         BUG_ON(ivsize && !req->iv);
1035         memcpy(crypt->iv, req->iv, ivsize);
1036
1037         buf = chainup_buffers(dev, req->src, crypt->auth_len,
1038                               &src_hook, flags, src_direction);
1039         req_ctx->src = src_hook.next;
1040         crypt->src_buf = src_hook.phys_next;
1041         if (!buf)
1042                 goto free_buf_src;
1043
1044         lastlen = buf->buf_len;
1045         if (lastlen >= authsize)
1046                 crypt->icv_rev_aes = buf->phys_addr +
1047                                      buf->buf_len - authsize;
1048
1049         req_ctx->dst = NULL;
1050
1051         if (req->src != req->dst) {
1052                 struct buffer_desc dst_hook;
1053
1054                 crypt->mode |= NPE_OP_NOT_IN_PLACE;
1055                 src_direction = DMA_TO_DEVICE;
1056
1057                 buf = chainup_buffers(dev, req->dst, crypt->auth_len,
1058                                       &dst_hook, flags, DMA_FROM_DEVICE);
1059                 req_ctx->dst = dst_hook.next;
1060                 crypt->dst_buf = dst_hook.phys_next;
1061
1062                 if (!buf)
1063                         goto free_buf_dst;
1064
1065                 if (encrypt) {
1066                         lastlen = buf->buf_len;
1067                         if (lastlen >= authsize)
1068                                 crypt->icv_rev_aes = buf->phys_addr +
1069                                                      buf->buf_len - authsize;
1070                 }
1071         }
1072
1073         if (unlikely(lastlen < authsize)) {
1074                 /* The 12 hmac bytes are scattered,
1075                  * we need to copy them into a safe buffer */
1076                 req_ctx->hmac_virt = dma_pool_alloc(buffer_pool, flags,
1077                                 &crypt->icv_rev_aes);
1078                 if (unlikely(!req_ctx->hmac_virt))
1079                         goto free_buf_dst;
1080                 if (!encrypt) {
1081                         scatterwalk_map_and_copy(req_ctx->hmac_virt,
1082                                 req->src, cryptlen, authsize, 0);
1083                 }
1084                 req_ctx->encrypt = encrypt;
1085         } else {
1086                 req_ctx->hmac_virt = NULL;
1087         }
1088
1089         crypt->ctl_flags |= CTL_FLAG_PERFORM_AEAD;
1090         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
1091         BUG_ON(qmgr_stat_overflow(SEND_QID));
1092         return -EINPROGRESS;
1093
1094 free_buf_dst:
1095         free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
1096 free_buf_src:
1097         free_buf_chain(dev, req_ctx->src, crypt->src_buf);
1098         crypt->ctl_flags = CTL_FLAG_UNUSED;
1099         return -ENOMEM;
1100 }
1101
1102 static int aead_setup(struct crypto_aead *tfm, unsigned int authsize)
1103 {
1104         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1105         u32 *flags = &tfm->base.crt_flags;
1106         unsigned digest_len = crypto_aead_maxauthsize(tfm);
1107         int ret;
1108
1109         if (!ctx->enckey_len && !ctx->authkey_len)
1110                 return 0;
1111         init_completion(&ctx->completion);
1112         atomic_inc(&ctx->configuring);
1113
1114         reset_sa_dir(&ctx->encrypt);
1115         reset_sa_dir(&ctx->decrypt);
1116
1117         ret = setup_cipher(&tfm->base, 0, ctx->enckey, ctx->enckey_len);
1118         if (ret)
1119                 goto out;
1120         ret = setup_cipher(&tfm->base, 1, ctx->enckey, ctx->enckey_len);
1121         if (ret)
1122                 goto out;
1123         ret = setup_auth(&tfm->base, 0, authsize, ctx->authkey,
1124                         ctx->authkey_len, digest_len);
1125         if (ret)
1126                 goto out;
1127         ret = setup_auth(&tfm->base, 1, authsize,  ctx->authkey,
1128                         ctx->authkey_len, digest_len);
1129         if (ret)
1130                 goto out;
1131
1132         if (*flags & CRYPTO_TFM_RES_WEAK_KEY) {
1133                 if (*flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS) {
1134                         ret = -EINVAL;
1135                         goto out;
1136                 } else {
1137                         *flags &= ~CRYPTO_TFM_RES_WEAK_KEY;
1138                 }
1139         }
1140 out:
1141         if (!atomic_dec_and_test(&ctx->configuring))
1142                 wait_for_completion(&ctx->completion);
1143         return ret;
1144 }
1145
1146 static int aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
1147 {
1148         int max = crypto_aead_maxauthsize(tfm) >> 2;
1149
1150         if ((authsize>>2) < 1 || (authsize>>2) > max || (authsize & 3))
1151                 return -EINVAL;
1152         return aead_setup(tfm, authsize);
1153 }
1154
1155 static int aead_setkey(struct crypto_aead *tfm, const u8 *key,
1156                         unsigned int keylen)
1157 {
1158         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1159         struct crypto_authenc_keys keys;
1160
1161         if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
1162                 goto badkey;
1163
1164         if (keys.authkeylen > sizeof(ctx->authkey))
1165                 goto badkey;
1166
1167         if (keys.enckeylen > sizeof(ctx->enckey))
1168                 goto badkey;
1169
1170         memcpy(ctx->authkey, keys.authkey, keys.authkeylen);
1171         memcpy(ctx->enckey, keys.enckey, keys.enckeylen);
1172         ctx->authkey_len = keys.authkeylen;
1173         ctx->enckey_len = keys.enckeylen;
1174
1175         memzero_explicit(&keys, sizeof(keys));
1176         return aead_setup(tfm, crypto_aead_authsize(tfm));
1177 badkey:
1178         crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
1179         memzero_explicit(&keys, sizeof(keys));
1180         return -EINVAL;
1181 }
1182
1183 static int des3_aead_setkey(struct crypto_aead *tfm, const u8 *key,
1184                             unsigned int keylen)
1185 {
1186         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1187         u32 flags = CRYPTO_TFM_RES_BAD_KEY_LEN;
1188         struct crypto_authenc_keys keys;
1189         int err;
1190
1191         err = crypto_authenc_extractkeys(&keys, key, keylen);
1192         if (unlikely(err))
1193                 goto badkey;
1194
1195         err = -EINVAL;
1196         if (keys.authkeylen > sizeof(ctx->authkey))
1197                 goto badkey;
1198
1199         if (keys.enckeylen != DES3_EDE_KEY_SIZE)
1200                 goto badkey;
1201
1202         flags = crypto_aead_get_flags(tfm);
1203         err = __des3_verify_key(&flags, keys.enckey);
1204         if (unlikely(err))
1205                 goto badkey;
1206
1207         memcpy(ctx->authkey, keys.authkey, keys.authkeylen);
1208         memcpy(ctx->enckey, keys.enckey, keys.enckeylen);
1209         ctx->authkey_len = keys.authkeylen;
1210         ctx->enckey_len = keys.enckeylen;
1211
1212         memzero_explicit(&keys, sizeof(keys));
1213         return aead_setup(tfm, crypto_aead_authsize(tfm));
1214 badkey:
1215         crypto_aead_set_flags(tfm, flags);
1216         memzero_explicit(&keys, sizeof(keys));
1217         return err;
1218 }
1219
1220 static int aead_encrypt(struct aead_request *req)
1221 {
1222         return aead_perform(req, 1, req->assoclen, req->cryptlen, req->iv);
1223 }
1224
1225 static int aead_decrypt(struct aead_request *req)
1226 {
1227         return aead_perform(req, 0, req->assoclen, req->cryptlen, req->iv);
1228 }
1229
1230 static struct ixp_alg ixp4xx_algos[] = {
1231 {
1232         .crypto = {
1233                 .cra_name       = "cbc(des)",
1234                 .cra_blocksize  = DES_BLOCK_SIZE,
1235                 .cra_u          = { .ablkcipher = {
1236                         .min_keysize    = DES_KEY_SIZE,
1237                         .max_keysize    = DES_KEY_SIZE,
1238                         .ivsize         = DES_BLOCK_SIZE,
1239                         }
1240                 }
1241         },
1242         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1243         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1244
1245 }, {
1246         .crypto = {
1247                 .cra_name       = "ecb(des)",
1248                 .cra_blocksize  = DES_BLOCK_SIZE,
1249                 .cra_u          = { .ablkcipher = {
1250                         .min_keysize    = DES_KEY_SIZE,
1251                         .max_keysize    = DES_KEY_SIZE,
1252                         }
1253                 }
1254         },
1255         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_ECB | KEYLEN_192,
1256         .cfg_dec = CIPH_DECR | MOD_DES | MOD_ECB | KEYLEN_192,
1257 }, {
1258         .crypto = {
1259                 .cra_name       = "cbc(des3_ede)",
1260                 .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1261                 .cra_u          = { .ablkcipher = {
1262                         .min_keysize    = DES3_EDE_KEY_SIZE,
1263                         .max_keysize    = DES3_EDE_KEY_SIZE,
1264                         .ivsize         = DES3_EDE_BLOCK_SIZE,
1265                         .setkey         = ablk_des3_setkey,
1266                         }
1267                 }
1268         },
1269         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1270         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1271 }, {
1272         .crypto = {
1273                 .cra_name       = "ecb(des3_ede)",
1274                 .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1275                 .cra_u          = { .ablkcipher = {
1276                         .min_keysize    = DES3_EDE_KEY_SIZE,
1277                         .max_keysize    = DES3_EDE_KEY_SIZE,
1278                         .setkey         = ablk_des3_setkey,
1279                         }
1280                 }
1281         },
1282         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_ECB | KEYLEN_192,
1283         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_ECB | KEYLEN_192,
1284 }, {
1285         .crypto = {
1286                 .cra_name       = "cbc(aes)",
1287                 .cra_blocksize  = AES_BLOCK_SIZE,
1288                 .cra_u          = { .ablkcipher = {
1289                         .min_keysize    = AES_MIN_KEY_SIZE,
1290                         .max_keysize    = AES_MAX_KEY_SIZE,
1291                         .ivsize         = AES_BLOCK_SIZE,
1292                         }
1293                 }
1294         },
1295         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1296         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1297 }, {
1298         .crypto = {
1299                 .cra_name       = "ecb(aes)",
1300                 .cra_blocksize  = AES_BLOCK_SIZE,
1301                 .cra_u          = { .ablkcipher = {
1302                         .min_keysize    = AES_MIN_KEY_SIZE,
1303                         .max_keysize    = AES_MAX_KEY_SIZE,
1304                         }
1305                 }
1306         },
1307         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_ECB,
1308         .cfg_dec = CIPH_DECR | MOD_AES | MOD_ECB,
1309 }, {
1310         .crypto = {
1311                 .cra_name       = "ctr(aes)",
1312                 .cra_blocksize  = AES_BLOCK_SIZE,
1313                 .cra_u          = { .ablkcipher = {
1314                         .min_keysize    = AES_MIN_KEY_SIZE,
1315                         .max_keysize    = AES_MAX_KEY_SIZE,
1316                         .ivsize         = AES_BLOCK_SIZE,
1317                         }
1318                 }
1319         },
1320         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
1321         .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
1322 }, {
1323         .crypto = {
1324                 .cra_name       = "rfc3686(ctr(aes))",
1325                 .cra_blocksize  = AES_BLOCK_SIZE,
1326                 .cra_u          = { .ablkcipher = {
1327                         .min_keysize    = AES_MIN_KEY_SIZE,
1328                         .max_keysize    = AES_MAX_KEY_SIZE,
1329                         .ivsize         = AES_BLOCK_SIZE,
1330                         .setkey         = ablk_rfc3686_setkey,
1331                         .encrypt        = ablk_rfc3686_crypt,
1332                         .decrypt        = ablk_rfc3686_crypt }
1333                 }
1334         },
1335         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
1336         .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
1337 } };
1338
1339 static struct ixp_aead_alg ixp4xx_aeads[] = {
1340 {
1341         .crypto = {
1342                 .base = {
1343                         .cra_name       = "authenc(hmac(md5),cbc(des))",
1344                         .cra_blocksize  = DES_BLOCK_SIZE,
1345                 },
1346                 .ivsize         = DES_BLOCK_SIZE,
1347                 .maxauthsize    = MD5_DIGEST_SIZE,
1348         },
1349         .hash = &hash_alg_md5,
1350         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1351         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1352 }, {
1353         .crypto = {
1354                 .base = {
1355                         .cra_name       = "authenc(hmac(md5),cbc(des3_ede))",
1356                         .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1357                 },
1358                 .ivsize         = DES3_EDE_BLOCK_SIZE,
1359                 .maxauthsize    = MD5_DIGEST_SIZE,
1360                 .setkey         = des3_aead_setkey,
1361         },
1362         .hash = &hash_alg_md5,
1363         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1364         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1365 }, {
1366         .crypto = {
1367                 .base = {
1368                         .cra_name       = "authenc(hmac(sha1),cbc(des))",
1369                         .cra_blocksize  = DES_BLOCK_SIZE,
1370                 },
1371                         .ivsize         = DES_BLOCK_SIZE,
1372                         .maxauthsize    = SHA1_DIGEST_SIZE,
1373         },
1374         .hash = &hash_alg_sha1,
1375         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1376         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1377 }, {
1378         .crypto = {
1379                 .base = {
1380                         .cra_name       = "authenc(hmac(sha1),cbc(des3_ede))",
1381                         .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1382                 },
1383                 .ivsize         = DES3_EDE_BLOCK_SIZE,
1384                 .maxauthsize    = SHA1_DIGEST_SIZE,
1385                 .setkey         = des3_aead_setkey,
1386         },
1387         .hash = &hash_alg_sha1,
1388         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1389         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1390 }, {
1391         .crypto = {
1392                 .base = {
1393                         .cra_name       = "authenc(hmac(md5),cbc(aes))",
1394                         .cra_blocksize  = AES_BLOCK_SIZE,
1395                 },
1396                 .ivsize         = AES_BLOCK_SIZE,
1397                 .maxauthsize    = MD5_DIGEST_SIZE,
1398         },
1399         .hash = &hash_alg_md5,
1400         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1401         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1402 }, {
1403         .crypto = {
1404                 .base = {
1405                         .cra_name       = "authenc(hmac(sha1),cbc(aes))",
1406                         .cra_blocksize  = AES_BLOCK_SIZE,
1407                 },
1408                 .ivsize         = AES_BLOCK_SIZE,
1409                 .maxauthsize    = SHA1_DIGEST_SIZE,
1410         },
1411         .hash = &hash_alg_sha1,
1412         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1413         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1414 } };
1415
1416 #define IXP_POSTFIX "-ixp4xx"
1417
1418 static const struct platform_device_info ixp_dev_info __initdata = {
1419         .name           = DRIVER_NAME,
1420         .id             = 0,
1421         .dma_mask       = DMA_BIT_MASK(32),
1422 };
1423
1424 static int __init ixp_module_init(void)
1425 {
1426         int num = ARRAY_SIZE(ixp4xx_algos);
1427         int i, err;
1428
1429         pdev = platform_device_register_full(&ixp_dev_info);
1430         if (IS_ERR(pdev))
1431                 return PTR_ERR(pdev);
1432
1433         spin_lock_init(&desc_lock);
1434         spin_lock_init(&emerg_lock);
1435
1436         err = init_ixp_crypto(&pdev->dev);
1437         if (err) {
1438                 platform_device_unregister(pdev);
1439                 return err;
1440         }
1441         for (i=0; i< num; i++) {
1442                 struct crypto_alg *cra = &ixp4xx_algos[i].crypto;
1443
1444                 if (snprintf(cra->cra_driver_name, CRYPTO_MAX_ALG_NAME,
1445                         "%s"IXP_POSTFIX, cra->cra_name) >=
1446                         CRYPTO_MAX_ALG_NAME)
1447                 {
1448                         continue;
1449                 }
1450                 if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES)) {
1451                         continue;
1452                 }
1453
1454                 /* block ciphers */
1455                 cra->cra_type = &crypto_ablkcipher_type;
1456                 cra->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
1457                                  CRYPTO_ALG_KERN_DRIVER_ONLY |
1458                                  CRYPTO_ALG_ASYNC;
1459                 if (!cra->cra_ablkcipher.setkey)
1460                         cra->cra_ablkcipher.setkey = ablk_setkey;
1461                 if (!cra->cra_ablkcipher.encrypt)
1462                         cra->cra_ablkcipher.encrypt = ablk_encrypt;
1463                 if (!cra->cra_ablkcipher.decrypt)
1464                         cra->cra_ablkcipher.decrypt = ablk_decrypt;
1465                 cra->cra_init = init_tfm_ablk;
1466
1467                 cra->cra_ctxsize = sizeof(struct ixp_ctx);
1468                 cra->cra_module = THIS_MODULE;
1469                 cra->cra_alignmask = 3;
1470                 cra->cra_priority = 300;
1471                 cra->cra_exit = exit_tfm;
1472                 if (crypto_register_alg(cra))
1473                         printk(KERN_ERR "Failed to register '%s'\n",
1474                                 cra->cra_name);
1475                 else
1476                         ixp4xx_algos[i].registered = 1;
1477         }
1478
1479         for (i = 0; i < ARRAY_SIZE(ixp4xx_aeads); i++) {
1480                 struct aead_alg *cra = &ixp4xx_aeads[i].crypto;
1481
1482                 if (snprintf(cra->base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
1483                              "%s"IXP_POSTFIX, cra->base.cra_name) >=
1484                     CRYPTO_MAX_ALG_NAME)
1485                         continue;
1486                 if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES))
1487                         continue;
1488
1489                 /* authenc */
1490                 cra->base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1491                                       CRYPTO_ALG_ASYNC;
1492                 cra->setkey = cra->setkey ?: aead_setkey;
1493                 cra->setauthsize = aead_setauthsize;
1494                 cra->encrypt = aead_encrypt;
1495                 cra->decrypt = aead_decrypt;
1496                 cra->init = init_tfm_aead;
1497                 cra->exit = exit_tfm_aead;
1498
1499                 cra->base.cra_ctxsize = sizeof(struct ixp_ctx);
1500                 cra->base.cra_module = THIS_MODULE;
1501                 cra->base.cra_alignmask = 3;
1502                 cra->base.cra_priority = 300;
1503
1504                 if (crypto_register_aead(cra))
1505                         printk(KERN_ERR "Failed to register '%s'\n",
1506                                 cra->base.cra_driver_name);
1507                 else
1508                         ixp4xx_aeads[i].registered = 1;
1509         }
1510         return 0;
1511 }
1512
1513 static void __exit ixp_module_exit(void)
1514 {
1515         int num = ARRAY_SIZE(ixp4xx_algos);
1516         int i;
1517
1518         for (i = 0; i < ARRAY_SIZE(ixp4xx_aeads); i++) {
1519                 if (ixp4xx_aeads[i].registered)
1520                         crypto_unregister_aead(&ixp4xx_aeads[i].crypto);
1521         }
1522
1523         for (i=0; i< num; i++) {
1524                 if (ixp4xx_algos[i].registered)
1525                         crypto_unregister_alg(&ixp4xx_algos[i].crypto);
1526         }
1527         release_ixp_crypto(&pdev->dev);
1528         platform_device_unregister(pdev);
1529 }
1530
1531 module_init(ixp_module_init);
1532 module_exit(ixp_module_exit);
1533
1534 MODULE_LICENSE("GPL");
1535 MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>");
1536 MODULE_DESCRIPTION("IXP4xx hardware crypto");
1537