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         memset(crypt_virt, 0, NPE_QLEN * sizeof(struct crypt_ctl));
 269         return 0;
 270 }
 271
 272 static spinlock_t desc_lock;
 273 static struct crypt_ctl *get_crypt_desc(void)
 274 {
 275         int i;
 276         static int idx = 0;
 277         unsigned long flags;
 278
 279         spin_lock_irqsave(&desc_lock, flags);
 280
 281         if (unlikely(!crypt_virt))
 282                 setup_crypt_desc();
 283         if (unlikely(!crypt_virt)) {
 284                 spin_unlock_irqrestore(&desc_lock, flags);
 285                 return NULL;
 286         }
 287         i = idx;
 288         if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
 289                 if (++idx >= NPE_QLEN)
 290                         idx = 0;
 291                 crypt_virt[i].ctl_flags = CTL_FLAG_USED;
 292                 spin_unlock_irqrestore(&desc_lock, flags);
 293                 return crypt_virt +i;
 294         } else {
 295                 spin_unlock_irqrestore(&desc_lock, flags);
 296                 return NULL;
 297         }
 298 }
 299
 300 static spinlock_t emerg_lock;
 301 static struct crypt_ctl *get_crypt_desc_emerg(void)
 302 {
 303         int i;
 304         static int idx = NPE_QLEN;
 305         struct crypt_ctl *desc;
 306         unsigned long flags;
 307
 308         desc = get_crypt_desc();
 309         if (desc)
 310                 return desc;
 311         if (unlikely(!crypt_virt))
 312                 return NULL;
 313
 314         spin_lock_irqsave(&emerg_lock, flags);
 315         i = idx;
 316         if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
 317                 if (++idx >= NPE_QLEN_TOTAL)
 318                         idx = NPE_QLEN;
 319                 crypt_virt[i].ctl_flags = CTL_FLAG_USED;
 320                 spin_unlock_irqrestore(&emerg_lock, flags);
 321                 return crypt_virt +i;
 322         } else {
 323                 spin_unlock_irqrestore(&emerg_lock, flags);
 324                 return NULL;
 325         }
 326 }
 327
 328 static void free_buf_chain(struct device *dev, struct buffer_desc *buf,u32 phys)
 329 {
 330         while (buf) {
 331                 struct buffer_desc *buf1;
 332                 u32 phys1;
 333
 334                 buf1 = buf->next;
 335                 phys1 = buf->phys_next;
 336                 dma_unmap_single(dev, buf->phys_next, buf->buf_len, buf->dir);
 337                 dma_pool_free(buffer_pool, buf, phys);
 338                 buf = buf1;
 339                 phys = phys1;
 340         }
 341 }
 342
 343 static struct tasklet_struct crypto_done_tasklet;
 344
 345 static void finish_scattered_hmac(struct crypt_ctl *crypt)
 346 {
 347         struct aead_request *req = crypt->data.aead_req;
 348         struct aead_ctx *req_ctx = aead_request_ctx(req);
 349         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 350         int authsize = crypto_aead_authsize(tfm);
 351         int decryptlen = req->assoclen + req->cryptlen - authsize;
 352
 353         if (req_ctx->encrypt) {
 354                 scatterwalk_map_and_copy(req_ctx->hmac_virt,
 355                         req->dst, decryptlen, authsize, 1);
 356         }
 357         dma_pool_free(buffer_pool, req_ctx->hmac_virt, crypt->icv_rev_aes);
 358 }
 359
 360 static void one_packet(dma_addr_t phys)
 361 {
 362         struct device *dev = &pdev->dev;
 363         struct crypt_ctl *crypt;
 364         struct ixp_ctx *ctx;
 365         int failed;
 366
 367         failed = phys & 0x1 ? -EBADMSG : 0;
 368         phys &= ~0x3;
 369         crypt = crypt_phys2virt(phys);
 370
 371         switch (crypt->ctl_flags & CTL_FLAG_MASK) {
 372         case CTL_FLAG_PERFORM_AEAD: {
 373                 struct aead_request *req = crypt->data.aead_req;
 374                 struct aead_ctx *req_ctx = aead_request_ctx(req);
 375
 376                 free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 377                 free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 378                 if (req_ctx->hmac_virt) {
 379                         finish_scattered_hmac(crypt);
 380                 }
 381                 req->base.complete(&req->base, failed);
 382                 break;
 383         }
 384         case CTL_FLAG_PERFORM_ABLK: {
 385                 struct ablkcipher_request *req = crypt->data.ablk_req;
 386                 struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req);
 387
 388                 if (req_ctx->dst) {
 389                         free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 390                 }
 391                 free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 392                 req->base.complete(&req->base, failed);
 393                 break;
 394         }
 395         case CTL_FLAG_GEN_ICV:
 396                 ctx = crypto_tfm_ctx(crypt->data.tfm);
 397                 dma_pool_free(ctx_pool, crypt->regist_ptr,
 398                                 crypt->regist_buf->phys_addr);
 399                 dma_pool_free(buffer_pool, crypt->regist_buf, crypt->src_buf);
 400                 if (atomic_dec_and_test(&ctx->configuring))
 401                         complete(&ctx->completion);
 402                 break;
 403         case CTL_FLAG_GEN_REVAES:
 404                 ctx = crypto_tfm_ctx(crypt->data.tfm);
 405                 *(u32*)ctx->decrypt.npe_ctx &= cpu_to_be32(~CIPH_ENCR);
 406                 if (atomic_dec_and_test(&ctx->configuring))
 407                         complete(&ctx->completion);
 408                 break;
 409         default:
 410                 BUG();
 411         }
 412         crypt->ctl_flags = CTL_FLAG_UNUSED;
 413 }
 414
 415 static void irqhandler(void *_unused)
 416 {
 417         tasklet_schedule(&crypto_done_tasklet);
 418 }
 419
 420 static void crypto_done_action(unsigned long arg)
 421 {
 422         int i;
 423
 424         for(i=0; i<4; i++) {
 425                 dma_addr_t phys = qmgr_get_entry(RECV_QID);
 426                 if (!phys)
 427                         return;
 428                 one_packet(phys);
 429         }
 430         tasklet_schedule(&crypto_done_tasklet);
 431 }
 432
 433 static int init_ixp_crypto(struct device *dev)
 434 {
 435         int ret = -ENODEV;
 436         u32 msg[2] = { 0, 0 };
 437
 438         if (! ( ~(*IXP4XX_EXP_CFG2) & (IXP4XX_FEATURE_HASH |
 439                                 IXP4XX_FEATURE_AES | IXP4XX_FEATURE_DES))) {
 440                 printk(KERN_ERR "ixp_crypto: No HW crypto available\n");
 441                 return ret;
 442         }
 443         npe_c = npe_request(NPE_ID);
 444         if (!npe_c)
 445                 return ret;
 446
 447         if (!npe_running(npe_c)) {
 448                 ret = npe_load_firmware(npe_c, npe_name(npe_c), dev);
 449                 if (ret)
 450                         goto npe_release;
 451                 if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
 452                         goto npe_error;
 453         } else {
 454                 if (npe_send_message(npe_c, msg, "STATUS_MSG"))
 455                         goto npe_error;
 456
 457                 if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
 458                         goto npe_error;
 459         }
 460
 461         switch ((msg[1]>>16) & 0xff) {
 462         case 3:
 463                 printk(KERN_WARNING "Firmware of %s lacks AES support\n",
 464                                 npe_name(npe_c));
 465                 support_aes = 0;
 466                 break;
 467         case 4:
 468         case 5:
 469                 support_aes = 1;
 470                 break;
 471         default:
 472                 printk(KERN_ERR "Firmware of %s lacks crypto support\n",
 473                         npe_name(npe_c));
 474                 ret = -ENODEV;
 475                 goto npe_release;
 476         }
 477         /* buffer_pool will also be used to sometimes store the hmac,
 478          * so assure it is large enough
 479          */
 480         BUILD_BUG_ON(SHA1_DIGEST_SIZE > sizeof(struct buffer_desc));
 481         buffer_pool = dma_pool_create("buffer", dev,
 482                         sizeof(struct buffer_desc), 32, 0);
 483         ret = -ENOMEM;
 484         if (!buffer_pool) {
 485                 goto err;
 486         }
 487         ctx_pool = dma_pool_create("context", dev,
 488                         NPE_CTX_LEN, 16, 0);
 489         if (!ctx_pool) {
 490                 goto err;
 491         }
 492         ret = qmgr_request_queue(SEND_QID, NPE_QLEN_TOTAL, 0, 0,
 493                                  "ixp_crypto:out", NULL);
 494         if (ret)
 495                 goto err;
 496         ret = qmgr_request_queue(RECV_QID, NPE_QLEN, 0, 0,
 497                                  "ixp_crypto:in", NULL);
 498         if (ret) {
 499                 qmgr_release_queue(SEND_QID);
 500                 goto err;
 501         }
 502         qmgr_set_irq(RECV_QID, QUEUE_IRQ_SRC_NOT_EMPTY, irqhandler, NULL);
 503         tasklet_init(&crypto_done_tasklet, crypto_done_action, 0);
 504
 505         qmgr_enable_irq(RECV_QID);
 506         return 0;
 507
 508 npe_error:
 509         printk(KERN_ERR "%s not responding\n", npe_name(npe_c));
 510         ret = -EIO;
 511 err:
 512         dma_pool_destroy(ctx_pool);
 513         dma_pool_destroy(buffer_pool);
 514 npe_release:
 515         npe_release(npe_c);
 516         return ret;
 517 }
 518
 519 static void release_ixp_crypto(struct device *dev)
 520 {
 521         qmgr_disable_irq(RECV_QID);
 522         tasklet_kill(&crypto_done_tasklet);
 523
 524         qmgr_release_queue(SEND_QID);
 525         qmgr_release_queue(RECV_QID);
 526
 527         dma_pool_destroy(ctx_pool);
 528         dma_pool_destroy(buffer_pool);
 529
 530         npe_release(npe_c);
 531
 532         if (crypt_virt) {
 533                 dma_free_coherent(dev,
 534                         NPE_QLEN_TOTAL * sizeof( struct crypt_ctl),
 535                         crypt_virt, crypt_phys);
 536         }
 537         return;
 538 }
 539
 540 static void reset_sa_dir(struct ix_sa_dir *dir)
 541 {
 542         memset(dir->npe_ctx, 0, NPE_CTX_LEN);
 543         dir->npe_ctx_idx = 0;
 544         dir->npe_mode = 0;
 545 }
 546
 547 static int init_sa_dir(struct ix_sa_dir *dir)
 548 {
 549         dir->npe_ctx = dma_pool_alloc(ctx_pool, GFP_KERNEL, &dir->npe_ctx_phys);
 550         if (!dir->npe_ctx) {
 551                 return -ENOMEM;
 552         }
 553         reset_sa_dir(dir);
 554         return 0;
 555 }
 556
 557 static void free_sa_dir(struct ix_sa_dir *dir)
 558 {
 559         memset(dir->npe_ctx, 0, NPE_CTX_LEN);
 560         dma_pool_free(ctx_pool, dir->npe_ctx, dir->npe_ctx_phys);
 561 }
 562
 563 static int init_tfm(struct crypto_tfm *tfm)
 564 {
 565         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 566         int ret;
 567
 568         atomic_set(&ctx->configuring, 0);
 569         ret = init_sa_dir(&ctx->encrypt);
 570         if (ret)
 571                 return ret;
 572         ret = init_sa_dir(&ctx->decrypt);
 573         if (ret) {
 574                 free_sa_dir(&ctx->encrypt);
 575         }
 576         return ret;
 577 }
 578
 579 static int init_tfm_ablk(struct crypto_tfm *tfm)
 580 {
 581         tfm->crt_ablkcipher.reqsize = sizeof(struct ablk_ctx);
 582         return init_tfm(tfm);
 583 }
 584
 585 static int init_tfm_aead(struct crypto_aead *tfm)
 586 {
 587         crypto_aead_set_reqsize(tfm, sizeof(struct aead_ctx));
 588         return init_tfm(crypto_aead_tfm(tfm));
 589 }
 590
 591 static void exit_tfm(struct crypto_tfm *tfm)
 592 {
 593         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 594         free_sa_dir(&ctx->encrypt);
 595         free_sa_dir(&ctx->decrypt);
 596 }
 597
 598 static void exit_tfm_aead(struct crypto_aead *tfm)
 599 {
 600         exit_tfm(crypto_aead_tfm(tfm));
 601 }
 602
 603 static int register_chain_var(struct crypto_tfm *tfm, u8 xpad, u32 target,
 604                 int init_len, u32 ctx_addr, const u8 *key, int key_len)
 605 {
 606         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 607         struct crypt_ctl *crypt;
 608         struct buffer_desc *buf;
 609         int i;
 610         u8 *pad;
 611         u32 pad_phys, buf_phys;
 612
 613         BUILD_BUG_ON(NPE_CTX_LEN < HMAC_PAD_BLOCKLEN);
 614         pad = dma_pool_alloc(ctx_pool, GFP_KERNEL, &pad_phys);
 615         if (!pad)
 616                 return -ENOMEM;
 617         buf = dma_pool_alloc(buffer_pool, GFP_KERNEL, &buf_phys);
 618         if (!buf) {
 619                 dma_pool_free(ctx_pool, pad, pad_phys);
 620                 return -ENOMEM;
 621         }
 622         crypt = get_crypt_desc_emerg();
 623         if (!crypt) {
 624                 dma_pool_free(ctx_pool, pad, pad_phys);
 625                 dma_pool_free(buffer_pool, buf, buf_phys);
 626                 return -EAGAIN;
 627         }
 628
 629         memcpy(pad, key, key_len);
 630         memset(pad + key_len, 0, HMAC_PAD_BLOCKLEN - key_len);
 631         for (i = 0; i < HMAC_PAD_BLOCKLEN; i++) {
 632                 pad[i] ^= xpad;
 633         }
 634
 635         crypt->data.tfm = tfm;
 636         crypt->regist_ptr = pad;
 637         crypt->regist_buf = buf;
 638
 639         crypt->auth_offs = 0;
 640         crypt->auth_len = HMAC_PAD_BLOCKLEN;
 641         crypt->crypto_ctx = ctx_addr;
 642         crypt->src_buf = buf_phys;
 643         crypt->icv_rev_aes = target;
 644         crypt->mode = NPE_OP_HASH_GEN_ICV;
 645         crypt->init_len = init_len;
 646         crypt->ctl_flags |= CTL_FLAG_GEN_ICV;
 647
 648         buf->next = 0;
 649         buf->buf_len = HMAC_PAD_BLOCKLEN;
 650         buf->pkt_len = 0;
 651         buf->phys_addr = pad_phys;
 652
 653         atomic_inc(&ctx->configuring);
 654         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 655         BUG_ON(qmgr_stat_overflow(SEND_QID));
 656         return 0;
 657 }
 658
 659 static int setup_auth(struct crypto_tfm *tfm, int encrypt, unsigned authsize,
 660                 const u8 *key, int key_len, unsigned digest_len)
 661 {
 662         u32 itarget, otarget, npe_ctx_addr;
 663         unsigned char *cinfo;
 664         int init_len, ret = 0;
 665         u32 cfgword;
 666         struct ix_sa_dir *dir;
 667         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 668         const struct ix_hash_algo *algo;
 669
 670         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 671         cinfo = dir->npe_ctx + dir->npe_ctx_idx;
 672         algo = ix_hash(tfm);
 673
 674         /* write cfg word to cryptinfo */
 675         cfgword = algo->cfgword | ( authsize << 6); /* (authsize/4) << 8 */
 676 #ifndef __ARMEB__
 677         cfgword ^= 0xAA000000; /* change the "byte swap" flags */
 678 #endif
 679         *(u32*)cinfo = cpu_to_be32(cfgword);
 680         cinfo += sizeof(cfgword);
 681
 682         /* write ICV to cryptinfo */
 683         memcpy(cinfo, algo->icv, digest_len);
 684         cinfo += digest_len;
 685
 686         itarget = dir->npe_ctx_phys + dir->npe_ctx_idx
 687                                 + sizeof(algo->cfgword);
 688         otarget = itarget + digest_len;
 689         init_len = cinfo - (dir->npe_ctx + dir->npe_ctx_idx);
 690         npe_ctx_addr = dir->npe_ctx_phys + dir->npe_ctx_idx;
 691
 692         dir->npe_ctx_idx += init_len;
 693         dir->npe_mode |= NPE_OP_HASH_ENABLE;
 694
 695         if (!encrypt)
 696                 dir->npe_mode |= NPE_OP_HASH_VERIFY;
 697
 698         ret = register_chain_var(tfm, HMAC_OPAD_VALUE, otarget,
 699                         init_len, npe_ctx_addr, key, key_len);
 700         if (ret)
 701                 return ret;
 702         return register_chain_var(tfm, HMAC_IPAD_VALUE, itarget,
 703                         init_len, npe_ctx_addr, key, key_len);
 704 }
 705
 706 static int gen_rev_aes_key(struct crypto_tfm *tfm)
 707 {
 708         struct crypt_ctl *crypt;
 709         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 710         struct ix_sa_dir *dir = &ctx->decrypt;
 711
 712         crypt = get_crypt_desc_emerg();
 713         if (!crypt) {
 714                 return -EAGAIN;
 715         }
 716         *(u32*)dir->npe_ctx |= cpu_to_be32(CIPH_ENCR);
 717
 718         crypt->data.tfm = tfm;
 719         crypt->crypt_offs = 0;
 720         crypt->crypt_len = AES_BLOCK128;
 721         crypt->src_buf = 0;
 722         crypt->crypto_ctx = dir->npe_ctx_phys;
 723         crypt->icv_rev_aes = dir->npe_ctx_phys + sizeof(u32);
 724         crypt->mode = NPE_OP_ENC_GEN_KEY;
 725         crypt->init_len = dir->npe_ctx_idx;
 726         crypt->ctl_flags |= CTL_FLAG_GEN_REVAES;
 727
 728         atomic_inc(&ctx->configuring);
 729         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 730         BUG_ON(qmgr_stat_overflow(SEND_QID));
 731         return 0;
 732 }
 733
 734 static int setup_cipher(struct crypto_tfm *tfm, int encrypt,
 735                 const u8 *key, int key_len)
 736 {
 737         u8 *cinfo;
 738         u32 cipher_cfg;
 739         u32 keylen_cfg = 0;
 740         struct ix_sa_dir *dir;
 741         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 742         u32 *flags = &tfm->crt_flags;
 743
 744         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 745         cinfo = dir->npe_ctx;
 746
 747         if (encrypt) {
 748                 cipher_cfg = cipher_cfg_enc(tfm);
 749                 dir->npe_mode |= NPE_OP_CRYPT_ENCRYPT;
 750         } else {
 751                 cipher_cfg = cipher_cfg_dec(tfm);
 752         }
 753         if (cipher_cfg & MOD_AES) {
 754                 switch (key_len) {
 755                 case 16: keylen_cfg = MOD_AES128; break;
 756                 case 24: keylen_cfg = MOD_AES192; break;
 757                 case 32: keylen_cfg = MOD_AES256; break;
 758                 default:
 759                         *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
 760                         return -EINVAL;
 761                 }
 762                 cipher_cfg |= keylen_cfg;
 763         } else if (cipher_cfg & MOD_3DES) {
 764                 const u32 *K = (const u32 *)key;
 765                 if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
 766                              !((K[2] ^ K[4]) | (K[3] ^ K[5]))))
 767                 {
 768                         *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
 769                         return -EINVAL;
 770                 }
 771         } else {
 772                 u32 tmp[DES_EXPKEY_WORDS];
 773                 if (des_ekey(tmp, key) == 0) {
 774                         *flags |= CRYPTO_TFM_RES_WEAK_KEY;
 775                 }
 776         }
 777         /* write cfg word to cryptinfo */
 778         *(u32*)cinfo = cpu_to_be32(cipher_cfg);
 779         cinfo += sizeof(cipher_cfg);
 780
 781         /* write cipher key to cryptinfo */
 782         memcpy(cinfo, key, key_len);
 783         /* NPE wants keylen set to DES3_EDE_KEY_SIZE even for single DES */
 784         if (key_len < DES3_EDE_KEY_SIZE && !(cipher_cfg & MOD_AES)) {
 785                 memset(cinfo + key_len, 0, DES3_EDE_KEY_SIZE -key_len);
 786                 key_len = DES3_EDE_KEY_SIZE;
 787         }
 788         dir->npe_ctx_idx = sizeof(cipher_cfg) + key_len;
 789         dir->npe_mode |= NPE_OP_CRYPT_ENABLE;
 790         if ((cipher_cfg & MOD_AES) && !encrypt) {
 791                 return gen_rev_aes_key(tfm);
 792         }
 793         return 0;
 794 }
 795
 796 static struct buffer_desc *chainup_buffers(struct device *dev,
 797                 struct scatterlist *sg, unsigned nbytes,
 798                 struct buffer_desc *buf, gfp_t flags,
 799                 enum dma_data_direction dir)
 800 {
 801         for (; nbytes > 0; sg = sg_next(sg)) {
 802                 unsigned len = min(nbytes, sg->length);
 803                 struct buffer_desc *next_buf;
 804                 u32 next_buf_phys;
 805                 void *ptr;
 806
 807                 nbytes -= len;
 808                 ptr = sg_virt(sg);
 809                 next_buf = dma_pool_alloc(buffer_pool, flags, &next_buf_phys);
 810                 if (!next_buf) {
 811                         buf = NULL;
 812                         break;
 813                 }
 814                 sg_dma_address(sg) = dma_map_single(dev, ptr, len, dir);
 815                 buf->next = next_buf;
 816                 buf->phys_next = next_buf_phys;
 817                 buf = next_buf;
 818
 819                 buf->phys_addr = sg_dma_address(sg);
 820                 buf->buf_len = len;
 821                 buf->dir = dir;
 822         }
 823         buf->next = NULL;
 824         buf->phys_next = 0;
 825         return buf;
 826 }
 827
 828 static int ablk_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
 829                         unsigned int key_len)
 830 {
 831         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 832         u32 *flags = &tfm->base.crt_flags;
 833         int ret;
 834
 835         init_completion(&ctx->completion);
 836         atomic_inc(&ctx->configuring);
 837
 838         reset_sa_dir(&ctx->encrypt);
 839         reset_sa_dir(&ctx->decrypt);
 840
 841         ctx->encrypt.npe_mode = NPE_OP_HMAC_DISABLE;
 842         ctx->decrypt.npe_mode = NPE_OP_HMAC_DISABLE;
 843
 844         ret = setup_cipher(&tfm->base, 0, key, key_len);
 845         if (ret)
 846                 goto out;
 847         ret = setup_cipher(&tfm->base, 1, key, key_len);
 848         if (ret)
 849                 goto out;
 850
 851         if (*flags & CRYPTO_TFM_RES_WEAK_KEY) {
 852                 if (*flags & CRYPTO_TFM_REQ_WEAK_KEY) {
 853                         ret = -EINVAL;
 854                 } else {
 855                         *flags &= ~CRYPTO_TFM_RES_WEAK_KEY;
 856                 }
 857         }
 858 out:
 859         if (!atomic_dec_and_test(&ctx->configuring))
 860                 wait_for_completion(&ctx->completion);
 861         return ret;
 862 }
 863
 864 static int ablk_rfc3686_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
 865                 unsigned int key_len)
 866 {
 867         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 868
 869         /* the nonce is stored in bytes at end of key */
 870         if (key_len < CTR_RFC3686_NONCE_SIZE)
 871                 return -EINVAL;
 872
 873         memcpy(ctx->nonce, key + (key_len - CTR_RFC3686_NONCE_SIZE),
 874                         CTR_RFC3686_NONCE_SIZE);
 875
 876         key_len -= CTR_RFC3686_NONCE_SIZE;
 877         return ablk_setkey(tfm, key, key_len);
 878 }
 879
 880 static int ablk_perform(struct ablkcipher_request *req, int encrypt)
 881 {
 882         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 883         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 884         unsigned ivsize = crypto_ablkcipher_ivsize(tfm);
 885         struct ix_sa_dir *dir;
 886         struct crypt_ctl *crypt;
 887         unsigned int nbytes = req->nbytes;
 888         enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
 889         struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req);
 890         struct buffer_desc src_hook;
 891         struct device *dev = &pdev->dev;
 892         gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
 893                                 GFP_KERNEL : GFP_ATOMIC;
 894
 895         if (qmgr_stat_full(SEND_QID))
 896                 return -EAGAIN;
 897         if (atomic_read(&ctx->configuring))
 898                 return -EAGAIN;
 899
 900         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 901
 902         crypt = get_crypt_desc();
 903         if (!crypt)
 904                 return -ENOMEM;
 905
 906         crypt->data.ablk_req = req;
 907         crypt->crypto_ctx = dir->npe_ctx_phys;
 908         crypt->mode = dir->npe_mode;
 909         crypt->init_len = dir->npe_ctx_idx;
 910
 911         crypt->crypt_offs = 0;
 912         crypt->crypt_len = nbytes;
 913
 914         BUG_ON(ivsize && !req->info);
 915         memcpy(crypt->iv, req->info, ivsize);
 916         if (req->src != req->dst) {
 917                 struct buffer_desc dst_hook;
 918                 crypt->mode |= NPE_OP_NOT_IN_PLACE;
 919                 /* This was never tested by Intel
 920                  * for more than one dst buffer, I think. */
 921                 req_ctx->dst = NULL;
 922                 if (!chainup_buffers(dev, req->dst, nbytes, &dst_hook,
 923                                         flags, DMA_FROM_DEVICE))
 924                         goto free_buf_dest;
 925                 src_direction = DMA_TO_DEVICE;
 926                 req_ctx->dst = dst_hook.next;
 927                 crypt->dst_buf = dst_hook.phys_next;
 928         } else {
 929                 req_ctx->dst = NULL;
 930         }
 931         req_ctx->src = NULL;
 932         if (!chainup_buffers(dev, req->src, nbytes, &src_hook,
 933                                 flags, src_direction))
 934                 goto free_buf_src;
 935
 936         req_ctx->src = src_hook.next;
 937         crypt->src_buf = src_hook.phys_next;
 938         crypt->ctl_flags |= CTL_FLAG_PERFORM_ABLK;
 939         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 940         BUG_ON(qmgr_stat_overflow(SEND_QID));
 941         return -EINPROGRESS;
 942
 943 free_buf_src:
 944         free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 945 free_buf_dest:
 946         if (req->src != req->dst) {
 947                 free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 948         }
 949         crypt->ctl_flags = CTL_FLAG_UNUSED;
 950         return -ENOMEM;
 951 }
 952
 953 static int ablk_encrypt(struct ablkcipher_request *req)
 954 {
 955         return ablk_perform(req, 1);
 956 }
 957
 958 static int ablk_decrypt(struct ablkcipher_request *req)
 959 {
 960         return ablk_perform(req, 0);
 961 }
 962
 963 static int ablk_rfc3686_crypt(struct ablkcipher_request *req)
 964 {
 965         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 966         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 967         u8 iv[CTR_RFC3686_BLOCK_SIZE];
 968         u8 *info = req->info;
 969         int ret;
 970
 971         /* set up counter block */
 972         memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE);
 973         memcpy(iv + CTR_RFC3686_NONCE_SIZE, info, CTR_RFC3686_IV_SIZE);
 974
 975         /* initialize counter portion of counter block */
 976         *(__be32 *)(iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) =
 977                 cpu_to_be32(1);
 978
 979         req->info = iv;
 980         ret = ablk_perform(req, 1);
 981         req->info = info;
 982         return ret;
 983 }
 984
 985 static int aead_perform(struct aead_request *req, int encrypt,
 986                 int cryptoffset, int eff_cryptlen, u8 *iv)
 987 {
 988         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 989         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
 990         unsigned ivsize = crypto_aead_ivsize(tfm);
 991         unsigned authsize = crypto_aead_authsize(tfm);
 992         struct ix_sa_dir *dir;
 993         struct crypt_ctl *crypt;
 994         unsigned int cryptlen;
 995         struct buffer_desc *buf, src_hook;
 996         struct aead_ctx *req_ctx = aead_request_ctx(req);
 997         struct device *dev = &pdev->dev;
 998         gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
 999                                 GFP_KERNEL : GFP_ATOMIC;
1000         enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
1001         unsigned int lastlen;
1002
1003         if (qmgr_stat_full(SEND_QID))
1004                 return -EAGAIN;
1005         if (atomic_read(&ctx->configuring))
1006                 return -EAGAIN;
1007
1008         if (encrypt) {
1009                 dir = &ctx->encrypt;
1010                 cryptlen = req->cryptlen;
1011         } else {
1012                 dir = &ctx->decrypt;
1013                 /* req->cryptlen includes the authsize when decrypting */
1014                 cryptlen = req->cryptlen -authsize;
1015                 eff_cryptlen -= authsize;
1016         }
1017         crypt = get_crypt_desc();
1018         if (!crypt)
1019                 return -ENOMEM;
1020
1021         crypt->data.aead_req = req;
1022         crypt->crypto_ctx = dir->npe_ctx_phys;
1023         crypt->mode = dir->npe_mode;
1024         crypt->init_len = dir->npe_ctx_idx;
1025
1026         crypt->crypt_offs = cryptoffset;
1027         crypt->crypt_len = eff_cryptlen;
1028
1029         crypt->auth_offs = 0;
1030         crypt->auth_len = req->assoclen + cryptlen;
1031         BUG_ON(ivsize && !req->iv);
1032         memcpy(crypt->iv, req->iv, ivsize);
1033
1034         buf = chainup_buffers(dev, req->src, crypt->auth_len,
1035                               &src_hook, flags, src_direction);
1036         req_ctx->src = src_hook.next;
1037         crypt->src_buf = src_hook.phys_next;
1038         if (!buf)
1039                 goto free_buf_src;
1040
1041         lastlen = buf->buf_len;
1042         if (lastlen >= authsize)
1043                 crypt->icv_rev_aes = buf->phys_addr +
1044                                      buf->buf_len - authsize;
1045
1046         req_ctx->dst = NULL;
1047
1048         if (req->src != req->dst) {
1049                 struct buffer_desc dst_hook;
1050
1051                 crypt->mode |= NPE_OP_NOT_IN_PLACE;
1052                 src_direction = DMA_TO_DEVICE;
1053
1054                 buf = chainup_buffers(dev, req->dst, crypt->auth_len,
1055                                       &dst_hook, flags, DMA_FROM_DEVICE);
1056                 req_ctx->dst = dst_hook.next;
1057                 crypt->dst_buf = dst_hook.phys_next;
1058
1059                 if (!buf)
1060                         goto free_buf_dst;
1061
1062                 if (encrypt) {
1063                         lastlen = buf->buf_len;
1064                         if (lastlen >= authsize)
1065                                 crypt->icv_rev_aes = buf->phys_addr +
1066                                                      buf->buf_len - authsize;
1067                 }
1068         }
1069
1070         if (unlikely(lastlen < authsize)) {
1071                 /* The 12 hmac bytes are scattered,
1072                  * we need to copy them into a safe buffer */
1073                 req_ctx->hmac_virt = dma_pool_alloc(buffer_pool, flags,
1074                                 &crypt->icv_rev_aes);
1075                 if (unlikely(!req_ctx->hmac_virt))
1076                         goto free_buf_src;
1077                 if (!encrypt) {
1078                         scatterwalk_map_and_copy(req_ctx->hmac_virt,
1079                                 req->src, cryptlen, authsize, 0);
1080                 }
1081                 req_ctx->encrypt = encrypt;
1082         } else {
1083                 req_ctx->hmac_virt = NULL;
1084         }
1085
1086         crypt->ctl_flags |= CTL_FLAG_PERFORM_AEAD;
1087         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
1088         BUG_ON(qmgr_stat_overflow(SEND_QID));
1089         return -EINPROGRESS;
1090
1091 free_buf_src:
1092         free_buf_chain(dev, req_ctx->src, crypt->src_buf);
1093 free_buf_dst:
1094         free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
1095         crypt->ctl_flags = CTL_FLAG_UNUSED;
1096         return -ENOMEM;
1097 }
1098
1099 static int aead_setup(struct crypto_aead *tfm, unsigned int authsize)
1100 {
1101         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1102         u32 *flags = &tfm->base.crt_flags;
1103         unsigned digest_len = crypto_aead_maxauthsize(tfm);
1104         int ret;
1105
1106         if (!ctx->enckey_len && !ctx->authkey_len)
1107                 return 0;
1108         init_completion(&ctx->completion);
1109         atomic_inc(&ctx->configuring);
1110
1111         reset_sa_dir(&ctx->encrypt);
1112         reset_sa_dir(&ctx->decrypt);
1113
1114         ret = setup_cipher(&tfm->base, 0, ctx->enckey, ctx->enckey_len);
1115         if (ret)
1116                 goto out;
1117         ret = setup_cipher(&tfm->base, 1, ctx->enckey, ctx->enckey_len);
1118         if (ret)
1119                 goto out;
1120         ret = setup_auth(&tfm->base, 0, authsize, ctx->authkey,
1121                         ctx->authkey_len, digest_len);
1122         if (ret)
1123                 goto out;
1124         ret = setup_auth(&tfm->base, 1, authsize,  ctx->authkey,
1125                         ctx->authkey_len, digest_len);
1126         if (ret)
1127                 goto out;
1128
1129         if (*flags & CRYPTO_TFM_RES_WEAK_KEY) {
1130                 if (*flags & CRYPTO_TFM_REQ_WEAK_KEY) {
1131                         ret = -EINVAL;
1132                         goto out;
1133                 } else {
1134                         *flags &= ~CRYPTO_TFM_RES_WEAK_KEY;
1135                 }
1136         }
1137 out:
1138         if (!atomic_dec_and_test(&ctx->configuring))
1139                 wait_for_completion(&ctx->completion);
1140         return ret;
1141 }
1142
1143 static int aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
1144 {
1145         int max = crypto_aead_maxauthsize(tfm) >> 2;
1146
1147         if ((authsize>>2) < 1 || (authsize>>2) > max || (authsize & 3))
1148                 return -EINVAL;
1149         return aead_setup(tfm, authsize);
1150 }
1151
1152 static int aead_setkey(struct crypto_aead *tfm, const u8 *key,
1153                         unsigned int keylen)
1154 {
1155         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1156         struct crypto_authenc_keys keys;
1157
1158         if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
1159                 goto badkey;
1160
1161         if (keys.authkeylen > sizeof(ctx->authkey))
1162                 goto badkey;
1163
1164         if (keys.enckeylen > sizeof(ctx->enckey))
1165                 goto badkey;
1166
1167         memcpy(ctx->authkey, keys.authkey, keys.authkeylen);
1168         memcpy(ctx->enckey, keys.enckey, keys.enckeylen);
1169         ctx->authkey_len = keys.authkeylen;
1170         ctx->enckey_len = keys.enckeylen;
1171
1172         return aead_setup(tfm, crypto_aead_authsize(tfm));
1173 badkey:
1174         crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
1175         return -EINVAL;
1176 }
1177
1178 static int aead_encrypt(struct aead_request *req)
1179 {
1180         return aead_perform(req, 1, req->assoclen, req->cryptlen, req->iv);
1181 }
1182
1183 static int aead_decrypt(struct aead_request *req)
1184 {
1185         return aead_perform(req, 0, req->assoclen, req->cryptlen, req->iv);
1186 }
1187
1188 static struct ixp_alg ixp4xx_algos[] = {
1189 {
1190         .crypto = {
1191                 .cra_name       = "cbc(des)",
1192                 .cra_blocksize  = DES_BLOCK_SIZE,
1193                 .cra_u          = { .ablkcipher = {
1194                         .min_keysize    = DES_KEY_SIZE,
1195                         .max_keysize    = DES_KEY_SIZE,
1196                         .ivsize         = DES_BLOCK_SIZE,
1197                         .geniv          = "eseqiv",
1198                         }
1199                 }
1200         },
1201         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1202         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1203
1204 }, {
1205         .crypto = {
1206                 .cra_name       = "ecb(des)",
1207                 .cra_blocksize  = DES_BLOCK_SIZE,
1208                 .cra_u          = { .ablkcipher = {
1209                         .min_keysize    = DES_KEY_SIZE,
1210                         .max_keysize    = DES_KEY_SIZE,
1211                         }
1212                 }
1213         },
1214         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_ECB | KEYLEN_192,
1215         .cfg_dec = CIPH_DECR | MOD_DES | MOD_ECB | KEYLEN_192,
1216 }, {
1217         .crypto = {
1218                 .cra_name       = "cbc(des3_ede)",
1219                 .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1220                 .cra_u          = { .ablkcipher = {
1221                         .min_keysize    = DES3_EDE_KEY_SIZE,
1222                         .max_keysize    = DES3_EDE_KEY_SIZE,
1223                         .ivsize         = DES3_EDE_BLOCK_SIZE,
1224                         .geniv          = "eseqiv",
1225                         }
1226                 }
1227         },
1228         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1229         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1230 }, {
1231         .crypto = {
1232                 .cra_name       = "ecb(des3_ede)",
1233                 .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1234                 .cra_u          = { .ablkcipher = {
1235                         .min_keysize    = DES3_EDE_KEY_SIZE,
1236                         .max_keysize    = DES3_EDE_KEY_SIZE,
1237                         }
1238                 }
1239         },
1240         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_ECB | KEYLEN_192,
1241         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_ECB | KEYLEN_192,
1242 }, {
1243         .crypto = {
1244                 .cra_name       = "cbc(aes)",
1245                 .cra_blocksize  = AES_BLOCK_SIZE,
1246                 .cra_u          = { .ablkcipher = {
1247                         .min_keysize    = AES_MIN_KEY_SIZE,
1248                         .max_keysize    = AES_MAX_KEY_SIZE,
1249                         .ivsize         = AES_BLOCK_SIZE,
1250                         .geniv          = "eseqiv",
1251                         }
1252                 }
1253         },
1254         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1255         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1256 }, {
1257         .crypto = {
1258                 .cra_name       = "ecb(aes)",
1259                 .cra_blocksize  = AES_BLOCK_SIZE,
1260                 .cra_u          = { .ablkcipher = {
1261                         .min_keysize    = AES_MIN_KEY_SIZE,
1262                         .max_keysize    = AES_MAX_KEY_SIZE,
1263                         }
1264                 }
1265         },
1266         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_ECB,
1267         .cfg_dec = CIPH_DECR | MOD_AES | MOD_ECB,
1268 }, {
1269         .crypto = {
1270                 .cra_name       = "ctr(aes)",
1271                 .cra_blocksize  = AES_BLOCK_SIZE,
1272                 .cra_u          = { .ablkcipher = {
1273                         .min_keysize    = AES_MIN_KEY_SIZE,
1274                         .max_keysize    = AES_MAX_KEY_SIZE,
1275                         .ivsize         = AES_BLOCK_SIZE,
1276                         .geniv          = "eseqiv",
1277                         }
1278                 }
1279         },
1280         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
1281         .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
1282 }, {
1283         .crypto = {
1284                 .cra_name       = "rfc3686(ctr(aes))",
1285                 .cra_blocksize  = AES_BLOCK_SIZE,
1286                 .cra_u          = { .ablkcipher = {
1287                         .min_keysize    = AES_MIN_KEY_SIZE,
1288                         .max_keysize    = AES_MAX_KEY_SIZE,
1289                         .ivsize         = AES_BLOCK_SIZE,
1290                         .geniv          = "eseqiv",
1291                         .setkey         = ablk_rfc3686_setkey,
1292                         .encrypt        = ablk_rfc3686_crypt,
1293                         .decrypt        = ablk_rfc3686_crypt }
1294                 }
1295         },
1296         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
1297         .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
1298 } };
1299
1300 static struct ixp_aead_alg ixp4xx_aeads[] = {
1301 {
1302         .crypto = {
1303                 .base = {
1304                         .cra_name       = "authenc(hmac(md5),cbc(des))",
1305                         .cra_blocksize  = DES_BLOCK_SIZE,
1306                 },
1307                 .ivsize         = DES_BLOCK_SIZE,
1308                 .maxauthsize    = MD5_DIGEST_SIZE,
1309         },
1310         .hash = &hash_alg_md5,
1311         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1312         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1313 }, {
1314         .crypto = {
1315                 .base = {
1316                         .cra_name       = "authenc(hmac(md5),cbc(des3_ede))",
1317                         .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1318                 },
1319                 .ivsize         = DES3_EDE_BLOCK_SIZE,
1320                 .maxauthsize    = MD5_DIGEST_SIZE,
1321         },
1322         .hash = &hash_alg_md5,
1323         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1324         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1325 }, {
1326         .crypto = {
1327                 .base = {
1328                         .cra_name       = "authenc(hmac(sha1),cbc(des))",
1329                         .cra_blocksize  = DES_BLOCK_SIZE,
1330                 },
1331                         .ivsize         = DES_BLOCK_SIZE,
1332                         .maxauthsize    = SHA1_DIGEST_SIZE,
1333         },
1334         .hash = &hash_alg_sha1,
1335         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1336         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1337 }, {
1338         .crypto = {
1339                 .base = {
1340                         .cra_name       = "authenc(hmac(sha1),cbc(des3_ede))",
1341                         .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1342                 },
1343                 .ivsize         = DES3_EDE_BLOCK_SIZE,
1344                 .maxauthsize    = SHA1_DIGEST_SIZE,
1345         },
1346         .hash = &hash_alg_sha1,
1347         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1348         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1349 }, {
1350         .crypto = {
1351                 .base = {
1352                         .cra_name       = "authenc(hmac(md5),cbc(aes))",
1353                         .cra_blocksize  = AES_BLOCK_SIZE,
1354                 },
1355                 .ivsize         = AES_BLOCK_SIZE,
1356                 .maxauthsize    = MD5_DIGEST_SIZE,
1357         },
1358         .hash = &hash_alg_md5,
1359         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1360         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1361 }, {
1362         .crypto = {
1363                 .base = {
1364                         .cra_name       = "authenc(hmac(sha1),cbc(aes))",
1365                         .cra_blocksize  = AES_BLOCK_SIZE,
1366                 },
1367                 .ivsize         = AES_BLOCK_SIZE,
1368                 .maxauthsize    = SHA1_DIGEST_SIZE,
1369         },
1370         .hash = &hash_alg_sha1,
1371         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1372         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1373 } };
1374
1375 #define IXP_POSTFIX "-ixp4xx"
1376
1377 static const struct platform_device_info ixp_dev_info __initdata = {
1378         .name           = DRIVER_NAME,
1379         .id             = 0,
1380         .dma_mask       = DMA_BIT_MASK(32),
1381 };
1382
1383 static int __init ixp_module_init(void)
1384 {
1385         int num = ARRAY_SIZE(ixp4xx_algos);
1386         int i, err;
1387
1388         pdev = platform_device_register_full(&ixp_dev_info);
1389         if (IS_ERR(pdev))
1390                 return PTR_ERR(pdev);
1391
1392         spin_lock_init(&desc_lock);
1393         spin_lock_init(&emerg_lock);
1394
1395         err = init_ixp_crypto(&pdev->dev);
1396         if (err) {
1397                 platform_device_unregister(pdev);
1398                 return err;
1399         }
1400         for (i=0; i< num; i++) {
1401                 struct crypto_alg *cra = &ixp4xx_algos[i].crypto;
1402
1403                 if (snprintf(cra->cra_driver_name, CRYPTO_MAX_ALG_NAME,
1404                         "%s"IXP_POSTFIX, cra->cra_name) >=
1405                         CRYPTO_MAX_ALG_NAME)
1406                 {
1407                         continue;
1408                 }
1409                 if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES)) {
1410                         continue;
1411                 }
1412
1413                 /* block ciphers */
1414                 cra->cra_type = &crypto_ablkcipher_type;
1415                 cra->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
1416                                  CRYPTO_ALG_KERN_DRIVER_ONLY |
1417                                  CRYPTO_ALG_ASYNC;
1418                 if (!cra->cra_ablkcipher.setkey)
1419                         cra->cra_ablkcipher.setkey = ablk_setkey;
1420                 if (!cra->cra_ablkcipher.encrypt)
1421                         cra->cra_ablkcipher.encrypt = ablk_encrypt;
1422                 if (!cra->cra_ablkcipher.decrypt)
1423                         cra->cra_ablkcipher.decrypt = ablk_decrypt;
1424                 cra->cra_init = init_tfm_ablk;
1425
1426                 cra->cra_ctxsize = sizeof(struct ixp_ctx);
1427                 cra->cra_module = THIS_MODULE;
1428                 cra->cra_alignmask = 3;
1429                 cra->cra_priority = 300;
1430                 cra->cra_exit = exit_tfm;
1431                 if (crypto_register_alg(cra))
1432                         printk(KERN_ERR "Failed to register '%s'\n",
1433                                 cra->cra_name);
1434                 else
1435                         ixp4xx_algos[i].registered = 1;
1436         }
1437
1438         for (i = 0; i < ARRAY_SIZE(ixp4xx_aeads); i++) {
1439                 struct aead_alg *cra = &ixp4xx_aeads[i].crypto;
1440
1441                 if (snprintf(cra->base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
1442                              "%s"IXP_POSTFIX, cra->base.cra_name) >=
1443                     CRYPTO_MAX_ALG_NAME)
1444                         continue;
1445                 if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES))
1446                         continue;
1447
1448                 /* authenc */
1449                 cra->base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1450                                       CRYPTO_ALG_ASYNC;
1451                 cra->setkey = aead_setkey;
1452                 cra->setauthsize = aead_setauthsize;
1453                 cra->encrypt = aead_encrypt;
1454                 cra->decrypt = aead_decrypt;
1455                 cra->init = init_tfm_aead;
1456                 cra->exit = exit_tfm_aead;
1457
1458                 cra->base.cra_ctxsize = sizeof(struct ixp_ctx);
1459                 cra->base.cra_module = THIS_MODULE;
1460                 cra->base.cra_alignmask = 3;
1461                 cra->base.cra_priority = 300;
1462
1463                 if (crypto_register_aead(cra))
1464                         printk(KERN_ERR "Failed to register '%s'\n",
1465                                 cra->base.cra_driver_name);
1466                 else
1467                         ixp4xx_aeads[i].registered = 1;
1468         }
1469         return 0;
1470 }
1471
1472 static void __exit ixp_module_exit(void)
1473 {
1474         int num = ARRAY_SIZE(ixp4xx_algos);
1475         int i;
1476
1477         for (i = 0; i < ARRAY_SIZE(ixp4xx_aeads); i++) {
1478                 if (ixp4xx_aeads[i].registered)
1479                         crypto_unregister_aead(&ixp4xx_aeads[i].crypto);
1480         }
1481
1482         for (i=0; i< num; i++) {
1483                 if (ixp4xx_algos[i].registered)
1484                         crypto_unregister_alg(&ixp4xx_algos[i].crypto);
1485         }
1486         release_ixp_crypto(&pdev->dev);
1487         platform_device_unregister(pdev);
1488 }
1489
1490 module_init(ixp_module_init);
1491 module_exit(ixp_module_exit);
1492
1493 MODULE_LICENSE("GPL");
1494 MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>");
1495 MODULE_DESCRIPTION("IXP4xx hardware crypto");
1496