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/sha.h>
  27 #include <crypto/algapi.h>
  28 #include <crypto/aead.h>
  29 #include <crypto/authenc.h>
  30 #include <crypto/scatterwalk.h>
  31
  32 #include <mach/npe.h>
  33 #include <mach/qmgr.h>
  34
  35 #define MAX_KEYLEN 32
  36
  37 /* hash: cfgword + 2 * digestlen; crypt: keylen + cfgword */
  38 #define NPE_CTX_LEN 80
  39 #define AES_BLOCK128 16
  40
  41 #define NPE_OP_HASH_VERIFY   0x01
  42 #define NPE_OP_CCM_ENABLE    0x04
  43 #define NPE_OP_CRYPT_ENABLE  0x08
  44 #define NPE_OP_HASH_ENABLE   0x10
  45 #define NPE_OP_NOT_IN_PLACE  0x20
  46 #define NPE_OP_HMAC_DISABLE  0x40
  47 #define NPE_OP_CRYPT_ENCRYPT 0x80
  48
  49 #define NPE_OP_CCM_GEN_MIC   0xcc
  50 #define NPE_OP_HASH_GEN_ICV  0x50
  51 #define NPE_OP_ENC_GEN_KEY   0xc9
  52
  53 #define MOD_ECB     0x0000
  54 #define MOD_CTR     0x1000
  55 #define MOD_CBC_ENC 0x2000
  56 #define MOD_CBC_DEC 0x3000
  57 #define MOD_CCM_ENC 0x4000
  58 #define MOD_CCM_DEC 0x5000
  59
  60 #define KEYLEN_128  4
  61 #define KEYLEN_192  6
  62 #define KEYLEN_256  8
  63
  64 #define CIPH_DECR   0x0000
  65 #define CIPH_ENCR   0x0400
  66
  67 #define MOD_DES     0x0000
  68 #define MOD_TDEA2   0x0100
  69 #define MOD_3DES   0x0200
  70 #define MOD_AES     0x0800
  71 #define MOD_AES128  (0x0800 | KEYLEN_128)
  72 #define MOD_AES192  (0x0900 | KEYLEN_192)
  73 #define MOD_AES256  (0x0a00 | KEYLEN_256)
  74
  75 #define MAX_IVLEN   16
  76 #define NPE_ID      2  /* NPE C */
  77 #define NPE_QLEN    16
  78 /* Space for registering when the first
  79  * NPE_QLEN crypt_ctl are busy */
  80 #define NPE_QLEN_TOTAL 64
  81
  82 #define SEND_QID    29
  83 #define RECV_QID    30
  84
  85 #define CTL_FLAG_UNUSED         0x0000
  86 #define CTL_FLAG_USED           0x1000
  87 #define CTL_FLAG_PERFORM_ABLK   0x0001
  88 #define CTL_FLAG_GEN_ICV        0x0002
  89 #define CTL_FLAG_GEN_REVAES     0x0004
  90 #define CTL_FLAG_PERFORM_AEAD   0x0008
  91 #define CTL_FLAG_MASK           0x000f
  92
  93 #define HMAC_IPAD_VALUE   0x36
  94 #define HMAC_OPAD_VALUE   0x5C
  95 #define HMAC_PAD_BLOCKLEN SHA1_BLOCK_SIZE
  96
  97 #define MD5_DIGEST_SIZE   16
  98
  99 struct buffer_desc {
 100         u32 phys_next;
 101 #ifdef __ARMEB__
 102         u16 buf_len;
 103         u16 pkt_len;
 104 #else
 105         u16 pkt_len;
 106         u16 buf_len;
 107 #endif
 108         u32 phys_addr;
 109         u32 __reserved[4];
 110         struct buffer_desc *next;
 111         enum dma_data_direction dir;
 112 };
 113
 114 struct crypt_ctl {
 115 #ifdef __ARMEB__
 116         u8 mode;                /* NPE_OP_*  operation mode */
 117         u8 init_len;
 118         u16 reserved;
 119 #else
 120         u16 reserved;
 121         u8 init_len;
 122         u8 mode;                /* NPE_OP_*  operation mode */
 123 #endif
 124         u8 iv[MAX_IVLEN];       /* IV for CBC mode or CTR IV for CTR mode */
 125         u32 icv_rev_aes;        /* icv or rev aes */
 126         u32 src_buf;
 127         u32 dst_buf;
 128 #ifdef __ARMEB__
 129         u16 auth_offs;          /* Authentication start offset */
 130         u16 auth_len;           /* Authentication data length */
 131         u16 crypt_offs;         /* Cryption start offset */
 132         u16 crypt_len;          /* Cryption data length */
 133 #else
 134         u16 auth_len;           /* Authentication data length */
 135         u16 auth_offs;          /* Authentication start offset */
 136         u16 crypt_len;          /* Cryption data length */
 137         u16 crypt_offs;         /* Cryption start offset */
 138 #endif
 139         u32 aadAddr;            /* Additional Auth Data Addr for CCM mode */
 140         u32 crypto_ctx;         /* NPE Crypto Param structure address */
 141
 142         /* Used by Host: 4*4 bytes*/
 143         unsigned ctl_flags;
 144         union {
 145                 struct ablkcipher_request *ablk_req;
 146                 struct aead_request *aead_req;
 147                 struct crypto_tfm *tfm;
 148         } data;
 149         struct buffer_desc *regist_buf;
 150         u8 *regist_ptr;
 151 };
 152
 153 struct ablk_ctx {
 154         struct buffer_desc *src;
 155         struct buffer_desc *dst;
 156 };
 157
 158 struct aead_ctx {
 159         struct buffer_desc *buffer;
 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 static const struct ix_hash_algo hash_alg_md5 = {
 202         .cfgword        = 0xAA010004,
 203         .icv            = "\x01\x23\x45\x67\x89\xAB\xCD\xEF"
 204                           "\xFE\xDC\xBA\x98\x76\x54\x32\x10",
 205 };
 206 static const struct ix_hash_algo hash_alg_sha1 = {
 207         .cfgword        = 0x00000005,
 208         .icv            = "\x67\x45\x23\x01\xEF\xCD\xAB\x89\x98\xBA"
 209                           "\xDC\xFE\x10\x32\x54\x76\xC3\xD2\xE1\xF0",
 210 };
 211
 212 static struct npe *npe_c;
 213 static struct dma_pool *buffer_pool = NULL;
 214 static struct dma_pool *ctx_pool = NULL;
 215
 216 static struct crypt_ctl *crypt_virt = NULL;
 217 static dma_addr_t crypt_phys;
 218
 219 static int support_aes = 1;
 220
 221 #define DRIVER_NAME "ixp4xx_crypto"
 222
 223 static struct platform_device *pdev;
 224
 225 static inline dma_addr_t crypt_virt2phys(struct crypt_ctl *virt)
 226 {
 227         return crypt_phys + (virt - crypt_virt) * sizeof(struct crypt_ctl);
 228 }
 229
 230 static inline struct crypt_ctl *crypt_phys2virt(dma_addr_t phys)
 231 {
 232         return crypt_virt + (phys - crypt_phys) / sizeof(struct crypt_ctl);
 233 }
 234
 235 static inline u32 cipher_cfg_enc(struct crypto_tfm *tfm)
 236 {
 237         return container_of(tfm->__crt_alg, struct ixp_alg,crypto)->cfg_enc;
 238 }
 239
 240 static inline u32 cipher_cfg_dec(struct crypto_tfm *tfm)
 241 {
 242         return container_of(tfm->__crt_alg, struct ixp_alg,crypto)->cfg_dec;
 243 }
 244
 245 static inline const struct ix_hash_algo *ix_hash(struct crypto_tfm *tfm)
 246 {
 247         return container_of(tfm->__crt_alg, struct ixp_alg, crypto)->hash;
 248 }
 249
 250 static int setup_crypt_desc(void)
 251 {
 252         struct device *dev = &pdev->dev;
 253         BUILD_BUG_ON(sizeof(struct crypt_ctl) != 64);
 254         crypt_virt = dma_alloc_coherent(dev,
 255                         NPE_QLEN * sizeof(struct crypt_ctl),
 256                         &crypt_phys, GFP_ATOMIC);
 257         if (!crypt_virt)
 258                 return -ENOMEM;
 259         memset(crypt_virt, 0, NPE_QLEN * sizeof(struct crypt_ctl));
 260         return 0;
 261 }
 262
 263 static spinlock_t desc_lock;
 264 static struct crypt_ctl *get_crypt_desc(void)
 265 {
 266         int i;
 267         static int idx = 0;
 268         unsigned long flags;
 269
 270         spin_lock_irqsave(&desc_lock, flags);
 271
 272         if (unlikely(!crypt_virt))
 273                 setup_crypt_desc();
 274         if (unlikely(!crypt_virt)) {
 275                 spin_unlock_irqrestore(&desc_lock, flags);
 276                 return NULL;
 277         }
 278         i = idx;
 279         if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
 280                 if (++idx >= NPE_QLEN)
 281                         idx = 0;
 282                 crypt_virt[i].ctl_flags = CTL_FLAG_USED;
 283                 spin_unlock_irqrestore(&desc_lock, flags);
 284                 return crypt_virt +i;
 285         } else {
 286                 spin_unlock_irqrestore(&desc_lock, flags);
 287                 return NULL;
 288         }
 289 }
 290
 291 static spinlock_t emerg_lock;
 292 static struct crypt_ctl *get_crypt_desc_emerg(void)
 293 {
 294         int i;
 295         static int idx = NPE_QLEN;
 296         struct crypt_ctl *desc;
 297         unsigned long flags;
 298
 299         desc = get_crypt_desc();
 300         if (desc)
 301                 return desc;
 302         if (unlikely(!crypt_virt))
 303                 return NULL;
 304
 305         spin_lock_irqsave(&emerg_lock, flags);
 306         i = idx;
 307         if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
 308                 if (++idx >= NPE_QLEN_TOTAL)
 309                         idx = NPE_QLEN;
 310                 crypt_virt[i].ctl_flags = CTL_FLAG_USED;
 311                 spin_unlock_irqrestore(&emerg_lock, flags);
 312                 return crypt_virt +i;
 313         } else {
 314                 spin_unlock_irqrestore(&emerg_lock, flags);
 315                 return NULL;
 316         }
 317 }
 318
 319 static void free_buf_chain(struct device *dev, struct buffer_desc *buf,u32 phys)
 320 {
 321         while (buf) {
 322                 struct buffer_desc *buf1;
 323                 u32 phys1;
 324
 325                 buf1 = buf->next;
 326                 phys1 = buf->phys_next;
 327                 dma_unmap_single(dev, buf->phys_next, buf->buf_len, buf->dir);
 328                 dma_pool_free(buffer_pool, buf, phys);
 329                 buf = buf1;
 330                 phys = phys1;
 331         }
 332 }
 333
 334 static struct tasklet_struct crypto_done_tasklet;
 335
 336 static void finish_scattered_hmac(struct crypt_ctl *crypt)
 337 {
 338         struct aead_request *req = crypt->data.aead_req;
 339         struct aead_ctx *req_ctx = aead_request_ctx(req);
 340         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 341         int authsize = crypto_aead_authsize(tfm);
 342         int decryptlen = req->cryptlen - authsize;
 343
 344         if (req_ctx->encrypt) {
 345                 scatterwalk_map_and_copy(req_ctx->hmac_virt,
 346                         req->src, decryptlen, authsize, 1);
 347         }
 348         dma_pool_free(buffer_pool, req_ctx->hmac_virt, crypt->icv_rev_aes);
 349 }
 350
 351 static void one_packet(dma_addr_t phys)
 352 {
 353         struct device *dev = &pdev->dev;
 354         struct crypt_ctl *crypt;
 355         struct ixp_ctx *ctx;
 356         int failed;
 357
 358         failed = phys & 0x1 ? -EBADMSG : 0;
 359         phys &= ~0x3;
 360         crypt = crypt_phys2virt(phys);
 361
 362         switch (crypt->ctl_flags & CTL_FLAG_MASK) {
 363         case CTL_FLAG_PERFORM_AEAD: {
 364                 struct aead_request *req = crypt->data.aead_req;
 365                 struct aead_ctx *req_ctx = aead_request_ctx(req);
 366
 367                 free_buf_chain(dev, req_ctx->buffer, crypt->src_buf);
 368                 if (req_ctx->hmac_virt) {
 369                         finish_scattered_hmac(crypt);
 370                 }
 371                 req->base.complete(&req->base, failed);
 372                 break;
 373         }
 374         case CTL_FLAG_PERFORM_ABLK: {
 375                 struct ablkcipher_request *req = crypt->data.ablk_req;
 376                 struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req);
 377
 378                 if (req_ctx->dst) {
 379                         free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 380                 }
 381                 free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 382                 req->base.complete(&req->base, failed);
 383                 break;
 384         }
 385         case CTL_FLAG_GEN_ICV:
 386                 ctx = crypto_tfm_ctx(crypt->data.tfm);
 387                 dma_pool_free(ctx_pool, crypt->regist_ptr,
 388                                 crypt->regist_buf->phys_addr);
 389                 dma_pool_free(buffer_pool, crypt->regist_buf, crypt->src_buf);
 390                 if (atomic_dec_and_test(&ctx->configuring))
 391                         complete(&ctx->completion);
 392                 break;
 393         case CTL_FLAG_GEN_REVAES:
 394                 ctx = crypto_tfm_ctx(crypt->data.tfm);
 395                 *(u32*)ctx->decrypt.npe_ctx &= cpu_to_be32(~CIPH_ENCR);
 396                 if (atomic_dec_and_test(&ctx->configuring))
 397                         complete(&ctx->completion);
 398                 break;
 399         default:
 400                 BUG();
 401         }
 402         crypt->ctl_flags = CTL_FLAG_UNUSED;
 403 }
 404
 405 static void irqhandler(void *_unused)
 406 {
 407         tasklet_schedule(&crypto_done_tasklet);
 408 }
 409
 410 static void crypto_done_action(unsigned long arg)
 411 {
 412         int i;
 413
 414         for(i=0; i<4; i++) {
 415                 dma_addr_t phys = qmgr_get_entry(RECV_QID);
 416                 if (!phys)
 417                         return;
 418                 one_packet(phys);
 419         }
 420         tasklet_schedule(&crypto_done_tasklet);
 421 }
 422
 423 static int init_ixp_crypto(struct device *dev)
 424 {
 425         int ret = -ENODEV;
 426         u32 msg[2] = { 0, 0 };
 427
 428         if (! ( ~(*IXP4XX_EXP_CFG2) & (IXP4XX_FEATURE_HASH |
 429                                 IXP4XX_FEATURE_AES | IXP4XX_FEATURE_DES))) {
 430                 printk(KERN_ERR "ixp_crypto: No HW crypto available\n");
 431                 return ret;
 432         }
 433         npe_c = npe_request(NPE_ID);
 434         if (!npe_c)
 435                 return ret;
 436
 437         if (!npe_running(npe_c)) {
 438                 ret = npe_load_firmware(npe_c, npe_name(npe_c), dev);
 439                 if (ret) {
 440                         return ret;
 441                 }
 442                 if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
 443                         goto npe_error;
 444         } else {
 445                 if (npe_send_message(npe_c, msg, "STATUS_MSG"))
 446                         goto npe_error;
 447
 448                 if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
 449                         goto npe_error;
 450         }
 451
 452         switch ((msg[1]>>16) & 0xff) {
 453         case 3:
 454                 printk(KERN_WARNING "Firmware of %s lacks AES support\n",
 455                                 npe_name(npe_c));
 456                 support_aes = 0;
 457                 break;
 458         case 4:
 459         case 5:
 460                 support_aes = 1;
 461                 break;
 462         default:
 463                 printk(KERN_ERR "Firmware of %s lacks crypto support\n",
 464                         npe_name(npe_c));
 465                 return -ENODEV;
 466         }
 467         /* buffer_pool will also be used to sometimes store the hmac,
 468          * so assure it is large enough
 469          */
 470         BUILD_BUG_ON(SHA1_DIGEST_SIZE > sizeof(struct buffer_desc));
 471         buffer_pool = dma_pool_create("buffer", dev,
 472                         sizeof(struct buffer_desc), 32, 0);
 473         ret = -ENOMEM;
 474         if (!buffer_pool) {
 475                 goto err;
 476         }
 477         ctx_pool = dma_pool_create("context", dev,
 478                         NPE_CTX_LEN, 16, 0);
 479         if (!ctx_pool) {
 480                 goto err;
 481         }
 482         ret = qmgr_request_queue(SEND_QID, NPE_QLEN_TOTAL, 0, 0,
 483                                  "ixp_crypto:out", NULL);
 484         if (ret)
 485                 goto err;
 486         ret = qmgr_request_queue(RECV_QID, NPE_QLEN, 0, 0,
 487                                  "ixp_crypto:in", NULL);
 488         if (ret) {
 489                 qmgr_release_queue(SEND_QID);
 490                 goto err;
 491         }
 492         qmgr_set_irq(RECV_QID, QUEUE_IRQ_SRC_NOT_EMPTY, irqhandler, NULL);
 493         tasklet_init(&crypto_done_tasklet, crypto_done_action, 0);
 494
 495         qmgr_enable_irq(RECV_QID);
 496         return 0;
 497
 498 npe_error:
 499         printk(KERN_ERR "%s not responding\n", npe_name(npe_c));
 500         ret = -EIO;
 501 err:
 502         if (ctx_pool)
 503                 dma_pool_destroy(ctx_pool);
 504         if (buffer_pool)
 505                 dma_pool_destroy(buffer_pool);
 506         npe_release(npe_c);
 507         return ret;
 508 }
 509
 510 static void release_ixp_crypto(struct device *dev)
 511 {
 512         qmgr_disable_irq(RECV_QID);
 513         tasklet_kill(&crypto_done_tasklet);
 514
 515         qmgr_release_queue(SEND_QID);
 516         qmgr_release_queue(RECV_QID);
 517
 518         dma_pool_destroy(ctx_pool);
 519         dma_pool_destroy(buffer_pool);
 520
 521         npe_release(npe_c);
 522
 523         if (crypt_virt) {
 524                 dma_free_coherent(dev,
 525                         NPE_QLEN_TOTAL * sizeof( struct crypt_ctl),
 526                         crypt_virt, crypt_phys);
 527         }
 528         return;
 529 }
 530
 531 static void reset_sa_dir(struct ix_sa_dir *dir)
 532 {
 533         memset(dir->npe_ctx, 0, NPE_CTX_LEN);
 534         dir->npe_ctx_idx = 0;
 535         dir->npe_mode = 0;
 536 }
 537
 538 static int init_sa_dir(struct ix_sa_dir *dir)
 539 {
 540         dir->npe_ctx = dma_pool_alloc(ctx_pool, GFP_KERNEL, &dir->npe_ctx_phys);
 541         if (!dir->npe_ctx) {
 542                 return -ENOMEM;
 543         }
 544         reset_sa_dir(dir);
 545         return 0;
 546 }
 547
 548 static void free_sa_dir(struct ix_sa_dir *dir)
 549 {
 550         memset(dir->npe_ctx, 0, NPE_CTX_LEN);
 551         dma_pool_free(ctx_pool, dir->npe_ctx, dir->npe_ctx_phys);
 552 }
 553
 554 static int init_tfm(struct crypto_tfm *tfm)
 555 {
 556         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 557         int ret;
 558
 559         atomic_set(&ctx->configuring, 0);
 560         ret = init_sa_dir(&ctx->encrypt);
 561         if (ret)
 562                 return ret;
 563         ret = init_sa_dir(&ctx->decrypt);
 564         if (ret) {
 565                 free_sa_dir(&ctx->encrypt);
 566         }
 567         return ret;
 568 }
 569
 570 static int init_tfm_ablk(struct crypto_tfm *tfm)
 571 {
 572         tfm->crt_ablkcipher.reqsize = sizeof(struct ablk_ctx);
 573         return init_tfm(tfm);
 574 }
 575
 576 static int init_tfm_aead(struct crypto_tfm *tfm)
 577 {
 578         tfm->crt_aead.reqsize = sizeof(struct aead_ctx);
 579         return init_tfm(tfm);
 580 }
 581
 582 static void exit_tfm(struct crypto_tfm *tfm)
 583 {
 584         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 585         free_sa_dir(&ctx->encrypt);
 586         free_sa_dir(&ctx->decrypt);
 587 }
 588
 589 static int register_chain_var(struct crypto_tfm *tfm, u8 xpad, u32 target,
 590                 int init_len, u32 ctx_addr, const u8 *key, int key_len)
 591 {
 592         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 593         struct crypt_ctl *crypt;
 594         struct buffer_desc *buf;
 595         int i;
 596         u8 *pad;
 597         u32 pad_phys, buf_phys;
 598
 599         BUILD_BUG_ON(NPE_CTX_LEN < HMAC_PAD_BLOCKLEN);
 600         pad = dma_pool_alloc(ctx_pool, GFP_KERNEL, &pad_phys);
 601         if (!pad)
 602                 return -ENOMEM;
 603         buf = dma_pool_alloc(buffer_pool, GFP_KERNEL, &buf_phys);
 604         if (!buf) {
 605                 dma_pool_free(ctx_pool, pad, pad_phys);
 606                 return -ENOMEM;
 607         }
 608         crypt = get_crypt_desc_emerg();
 609         if (!crypt) {
 610                 dma_pool_free(ctx_pool, pad, pad_phys);
 611                 dma_pool_free(buffer_pool, buf, buf_phys);
 612                 return -EAGAIN;
 613         }
 614
 615         memcpy(pad, key, key_len);
 616         memset(pad + key_len, 0, HMAC_PAD_BLOCKLEN - key_len);
 617         for (i = 0; i < HMAC_PAD_BLOCKLEN; i++) {
 618                 pad[i] ^= xpad;
 619         }
 620
 621         crypt->data.tfm = tfm;
 622         crypt->regist_ptr = pad;
 623         crypt->regist_buf = buf;
 624
 625         crypt->auth_offs = 0;
 626         crypt->auth_len = HMAC_PAD_BLOCKLEN;
 627         crypt->crypto_ctx = ctx_addr;
 628         crypt->src_buf = buf_phys;
 629         crypt->icv_rev_aes = target;
 630         crypt->mode = NPE_OP_HASH_GEN_ICV;
 631         crypt->init_len = init_len;
 632         crypt->ctl_flags |= CTL_FLAG_GEN_ICV;
 633
 634         buf->next = 0;
 635         buf->buf_len = HMAC_PAD_BLOCKLEN;
 636         buf->pkt_len = 0;
 637         buf->phys_addr = pad_phys;
 638
 639         atomic_inc(&ctx->configuring);
 640         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 641         BUG_ON(qmgr_stat_overflow(SEND_QID));
 642         return 0;
 643 }
 644
 645 static int setup_auth(struct crypto_tfm *tfm, int encrypt, unsigned authsize,
 646                 const u8 *key, int key_len, unsigned digest_len)
 647 {
 648         u32 itarget, otarget, npe_ctx_addr;
 649         unsigned char *cinfo;
 650         int init_len, ret = 0;
 651         u32 cfgword;
 652         struct ix_sa_dir *dir;
 653         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 654         const struct ix_hash_algo *algo;
 655
 656         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 657         cinfo = dir->npe_ctx + dir->npe_ctx_idx;
 658         algo = ix_hash(tfm);
 659
 660         /* write cfg word to cryptinfo */
 661         cfgword = algo->cfgword | ( authsize << 6); /* (authsize/4) << 8 */
 662 #ifndef __ARMEB__
 663         cfgword ^= 0xAA000000; /* change the "byte swap" flags */
 664 #endif
 665         *(u32*)cinfo = cpu_to_be32(cfgword);
 666         cinfo += sizeof(cfgword);
 667
 668         /* write ICV to cryptinfo */
 669         memcpy(cinfo, algo->icv, digest_len);
 670         cinfo += digest_len;
 671
 672         itarget = dir->npe_ctx_phys + dir->npe_ctx_idx
 673                                 + sizeof(algo->cfgword);
 674         otarget = itarget + digest_len;
 675         init_len = cinfo - (dir->npe_ctx + dir->npe_ctx_idx);
 676         npe_ctx_addr = dir->npe_ctx_phys + dir->npe_ctx_idx;
 677
 678         dir->npe_ctx_idx += init_len;
 679         dir->npe_mode |= NPE_OP_HASH_ENABLE;
 680
 681         if (!encrypt)
 682                 dir->npe_mode |= NPE_OP_HASH_VERIFY;
 683
 684         ret = register_chain_var(tfm, HMAC_OPAD_VALUE, otarget,
 685                         init_len, npe_ctx_addr, key, key_len);
 686         if (ret)
 687                 return ret;
 688         return register_chain_var(tfm, HMAC_IPAD_VALUE, itarget,
 689                         init_len, npe_ctx_addr, key, key_len);
 690 }
 691
 692 static int gen_rev_aes_key(struct crypto_tfm *tfm)
 693 {
 694         struct crypt_ctl *crypt;
 695         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 696         struct ix_sa_dir *dir = &ctx->decrypt;
 697
 698         crypt = get_crypt_desc_emerg();
 699         if (!crypt) {
 700                 return -EAGAIN;
 701         }
 702         *(u32*)dir->npe_ctx |= cpu_to_be32(CIPH_ENCR);
 703
 704         crypt->data.tfm = tfm;
 705         crypt->crypt_offs = 0;
 706         crypt->crypt_len = AES_BLOCK128;
 707         crypt->src_buf = 0;
 708         crypt->crypto_ctx = dir->npe_ctx_phys;
 709         crypt->icv_rev_aes = dir->npe_ctx_phys + sizeof(u32);
 710         crypt->mode = NPE_OP_ENC_GEN_KEY;
 711         crypt->init_len = dir->npe_ctx_idx;
 712         crypt->ctl_flags |= CTL_FLAG_GEN_REVAES;
 713
 714         atomic_inc(&ctx->configuring);
 715         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 716         BUG_ON(qmgr_stat_overflow(SEND_QID));
 717         return 0;
 718 }
 719
 720 static int setup_cipher(struct crypto_tfm *tfm, int encrypt,
 721                 const u8 *key, int key_len)
 722 {
 723         u8 *cinfo;
 724         u32 cipher_cfg;
 725         u32 keylen_cfg = 0;
 726         struct ix_sa_dir *dir;
 727         struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
 728         u32 *flags = &tfm->crt_flags;
 729
 730         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 731         cinfo = dir->npe_ctx;
 732
 733         if (encrypt) {
 734                 cipher_cfg = cipher_cfg_enc(tfm);
 735                 dir->npe_mode |= NPE_OP_CRYPT_ENCRYPT;
 736         } else {
 737                 cipher_cfg = cipher_cfg_dec(tfm);
 738         }
 739         if (cipher_cfg & MOD_AES) {
 740                 switch (key_len) {
 741                 case 16: keylen_cfg = MOD_AES128; break;
 742                 case 24: keylen_cfg = MOD_AES192; break;
 743                 case 32: keylen_cfg = MOD_AES256; break;
 744                 default:
 745                         *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
 746                         return -EINVAL;
 747                 }
 748                 cipher_cfg |= keylen_cfg;
 749         } else if (cipher_cfg & MOD_3DES) {
 750                 const u32 *K = (const u32 *)key;
 751                 if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
 752                              !((K[2] ^ K[4]) | (K[3] ^ K[5]))))
 753                 {
 754                         *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
 755                         return -EINVAL;
 756                 }
 757         } else {
 758                 u32 tmp[DES_EXPKEY_WORDS];
 759                 if (des_ekey(tmp, key) == 0) {
 760                         *flags |= CRYPTO_TFM_RES_WEAK_KEY;
 761                 }
 762         }
 763         /* write cfg word to cryptinfo */
 764         *(u32*)cinfo = cpu_to_be32(cipher_cfg);
 765         cinfo += sizeof(cipher_cfg);
 766
 767         /* write cipher key to cryptinfo */
 768         memcpy(cinfo, key, key_len);
 769         /* NPE wants keylen set to DES3_EDE_KEY_SIZE even for single DES */
 770         if (key_len < DES3_EDE_KEY_SIZE && !(cipher_cfg & MOD_AES)) {
 771                 memset(cinfo + key_len, 0, DES3_EDE_KEY_SIZE -key_len);
 772                 key_len = DES3_EDE_KEY_SIZE;
 773         }
 774         dir->npe_ctx_idx = sizeof(cipher_cfg) + key_len;
 775         dir->npe_mode |= NPE_OP_CRYPT_ENABLE;
 776         if ((cipher_cfg & MOD_AES) && !encrypt) {
 777                 return gen_rev_aes_key(tfm);
 778         }
 779         return 0;
 780 }
 781
 782 static struct buffer_desc *chainup_buffers(struct device *dev,
 783                 struct scatterlist *sg, unsigned nbytes,
 784                 struct buffer_desc *buf, gfp_t flags,
 785                 enum dma_data_direction dir)
 786 {
 787         for (;nbytes > 0; sg = scatterwalk_sg_next(sg)) {
 788                 unsigned len = min(nbytes, sg->length);
 789                 struct buffer_desc *next_buf;
 790                 u32 next_buf_phys;
 791                 void *ptr;
 792
 793                 nbytes -= len;
 794                 ptr = page_address(sg_page(sg)) + sg->offset;
 795                 next_buf = dma_pool_alloc(buffer_pool, flags, &next_buf_phys);
 796                 if (!next_buf) {
 797                         buf = NULL;
 798                         break;
 799                 }
 800                 sg_dma_address(sg) = dma_map_single(dev, ptr, len, dir);
 801                 buf->next = next_buf;
 802                 buf->phys_next = next_buf_phys;
 803                 buf = next_buf;
 804
 805                 buf->phys_addr = sg_dma_address(sg);
 806                 buf->buf_len = len;
 807                 buf->dir = dir;
 808         }
 809         buf->next = NULL;
 810         buf->phys_next = 0;
 811         return buf;
 812 }
 813
 814 static int ablk_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
 815                         unsigned int key_len)
 816 {
 817         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 818         u32 *flags = &tfm->base.crt_flags;
 819         int ret;
 820
 821         init_completion(&ctx->completion);
 822         atomic_inc(&ctx->configuring);
 823
 824         reset_sa_dir(&ctx->encrypt);
 825         reset_sa_dir(&ctx->decrypt);
 826
 827         ctx->encrypt.npe_mode = NPE_OP_HMAC_DISABLE;
 828         ctx->decrypt.npe_mode = NPE_OP_HMAC_DISABLE;
 829
 830         ret = setup_cipher(&tfm->base, 0, key, key_len);
 831         if (ret)
 832                 goto out;
 833         ret = setup_cipher(&tfm->base, 1, key, key_len);
 834         if (ret)
 835                 goto out;
 836
 837         if (*flags & CRYPTO_TFM_RES_WEAK_KEY) {
 838                 if (*flags & CRYPTO_TFM_REQ_WEAK_KEY) {
 839                         ret = -EINVAL;
 840                 } else {
 841                         *flags &= ~CRYPTO_TFM_RES_WEAK_KEY;
 842                 }
 843         }
 844 out:
 845         if (!atomic_dec_and_test(&ctx->configuring))
 846                 wait_for_completion(&ctx->completion);
 847         return ret;
 848 }
 849
 850 static int ablk_rfc3686_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
 851                 unsigned int key_len)
 852 {
 853         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 854
 855         /* the nonce is stored in bytes at end of key */
 856         if (key_len < CTR_RFC3686_NONCE_SIZE)
 857                 return -EINVAL;
 858
 859         memcpy(ctx->nonce, key + (key_len - CTR_RFC3686_NONCE_SIZE),
 860                         CTR_RFC3686_NONCE_SIZE);
 861
 862         key_len -= CTR_RFC3686_NONCE_SIZE;
 863         return ablk_setkey(tfm, key, key_len);
 864 }
 865
 866 static int ablk_perform(struct ablkcipher_request *req, int encrypt)
 867 {
 868         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 869         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 870         unsigned ivsize = crypto_ablkcipher_ivsize(tfm);
 871         struct ix_sa_dir *dir;
 872         struct crypt_ctl *crypt;
 873         unsigned int nbytes = req->nbytes;
 874         enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
 875         struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req);
 876         struct buffer_desc src_hook;
 877         struct device *dev = &pdev->dev;
 878         gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
 879                                 GFP_KERNEL : GFP_ATOMIC;
 880
 881         if (qmgr_stat_full(SEND_QID))
 882                 return -EAGAIN;
 883         if (atomic_read(&ctx->configuring))
 884                 return -EAGAIN;
 885
 886         dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
 887
 888         crypt = get_crypt_desc();
 889         if (!crypt)
 890                 return -ENOMEM;
 891
 892         crypt->data.ablk_req = req;
 893         crypt->crypto_ctx = dir->npe_ctx_phys;
 894         crypt->mode = dir->npe_mode;
 895         crypt->init_len = dir->npe_ctx_idx;
 896
 897         crypt->crypt_offs = 0;
 898         crypt->crypt_len = nbytes;
 899
 900         BUG_ON(ivsize && !req->info);
 901         memcpy(crypt->iv, req->info, ivsize);
 902         if (req->src != req->dst) {
 903                 struct buffer_desc dst_hook;
 904                 crypt->mode |= NPE_OP_NOT_IN_PLACE;
 905                 /* This was never tested by Intel
 906                  * for more than one dst buffer, I think. */
 907                 BUG_ON(req->dst->length < nbytes);
 908                 req_ctx->dst = NULL;
 909                 if (!chainup_buffers(dev, req->dst, nbytes, &dst_hook,
 910                                         flags, DMA_FROM_DEVICE))
 911                         goto free_buf_dest;
 912                 src_direction = DMA_TO_DEVICE;
 913                 req_ctx->dst = dst_hook.next;
 914                 crypt->dst_buf = dst_hook.phys_next;
 915         } else {
 916                 req_ctx->dst = NULL;
 917         }
 918         req_ctx->src = NULL;
 919         if (!chainup_buffers(dev, req->src, nbytes, &src_hook,
 920                                 flags, src_direction))
 921                 goto free_buf_src;
 922
 923         req_ctx->src = src_hook.next;
 924         crypt->src_buf = src_hook.phys_next;
 925         crypt->ctl_flags |= CTL_FLAG_PERFORM_ABLK;
 926         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
 927         BUG_ON(qmgr_stat_overflow(SEND_QID));
 928         return -EINPROGRESS;
 929
 930 free_buf_src:
 931         free_buf_chain(dev, req_ctx->src, crypt->src_buf);
 932 free_buf_dest:
 933         if (req->src != req->dst) {
 934                 free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
 935         }
 936         crypt->ctl_flags = CTL_FLAG_UNUSED;
 937         return -ENOMEM;
 938 }
 939
 940 static int ablk_encrypt(struct ablkcipher_request *req)
 941 {
 942         return ablk_perform(req, 1);
 943 }
 944
 945 static int ablk_decrypt(struct ablkcipher_request *req)
 946 {
 947         return ablk_perform(req, 0);
 948 }
 949
 950 static int ablk_rfc3686_crypt(struct ablkcipher_request *req)
 951 {
 952         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 953         struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 954         u8 iv[CTR_RFC3686_BLOCK_SIZE];
 955         u8 *info = req->info;
 956         int ret;
 957
 958         /* set up counter block */
 959         memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE);
 960         memcpy(iv + CTR_RFC3686_NONCE_SIZE, info, CTR_RFC3686_IV_SIZE);
 961
 962         /* initialize counter portion of counter block */
 963         *(__be32 *)(iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) =
 964                 cpu_to_be32(1);
 965
 966         req->info = iv;
 967         ret = ablk_perform(req, 1);
 968         req->info = info;
 969         return ret;
 970 }
 971
 972 static int hmac_inconsistent(struct scatterlist *sg, unsigned start,
 973                 unsigned int nbytes)
 974 {
 975         int offset = 0;
 976
 977         if (!nbytes)
 978                 return 0;
 979
 980         for (;;) {
 981                 if (start < offset + sg->length)
 982                         break;
 983
 984                 offset += sg->length;
 985                 sg = scatterwalk_sg_next(sg);
 986         }
 987         return (start + nbytes > offset + sg->length);
 988 }
 989
 990 static int aead_perform(struct aead_request *req, int encrypt,
 991                 int cryptoffset, int eff_cryptlen, u8 *iv)
 992 {
 993         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 994         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
 995         unsigned ivsize = crypto_aead_ivsize(tfm);
 996         unsigned authsize = crypto_aead_authsize(tfm);
 997         struct ix_sa_dir *dir;
 998         struct crypt_ctl *crypt;
 999         unsigned int cryptlen;
1000         struct buffer_desc *buf, src_hook;
1001         struct aead_ctx *req_ctx = aead_request_ctx(req);
1002         struct device *dev = &pdev->dev;
1003         gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
1004                                 GFP_KERNEL : GFP_ATOMIC;
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 + ivsize + cryptlen;
1034         BUG_ON(ivsize && !req->iv);
1035         memcpy(crypt->iv, req->iv, ivsize);
1036
1037         if (req->src != req->dst) {
1038                 BUG(); /* -ENOTSUP because of my laziness */
1039         }
1040
1041         /* ASSOC data */
1042         buf = chainup_buffers(dev, req->assoc, req->assoclen, &src_hook,
1043                 flags, DMA_TO_DEVICE);
1044         req_ctx->buffer = src_hook.next;
1045         crypt->src_buf = src_hook.phys_next;
1046         if (!buf)
1047                 goto out;
1048         /* IV */
1049         sg_init_table(&req_ctx->ivlist, 1);
1050         sg_set_buf(&req_ctx->ivlist, iv, ivsize);
1051         buf = chainup_buffers(dev, &req_ctx->ivlist, ivsize, buf, flags,
1052                         DMA_BIDIRECTIONAL);
1053         if (!buf)
1054                 goto free_chain;
1055         if (unlikely(hmac_inconsistent(req->src, cryptlen, authsize))) {
1056                 /* The 12 hmac bytes are scattered,
1057                  * we need to copy them into a safe buffer */
1058                 req_ctx->hmac_virt = dma_pool_alloc(buffer_pool, flags,
1059                                 &crypt->icv_rev_aes);
1060                 if (unlikely(!req_ctx->hmac_virt))
1061                         goto free_chain;
1062                 if (!encrypt) {
1063                         scatterwalk_map_and_copy(req_ctx->hmac_virt,
1064                                 req->src, cryptlen, authsize, 0);
1065                 }
1066                 req_ctx->encrypt = encrypt;
1067         } else {
1068                 req_ctx->hmac_virt = NULL;
1069         }
1070         /* Crypt */
1071         buf = chainup_buffers(dev, req->src, cryptlen + authsize, buf, flags,
1072                         DMA_BIDIRECTIONAL);
1073         if (!buf)
1074                 goto free_hmac_virt;
1075         if (!req_ctx->hmac_virt) {
1076                 crypt->icv_rev_aes = buf->phys_addr + buf->buf_len - authsize;
1077         }
1078
1079         crypt->ctl_flags |= CTL_FLAG_PERFORM_AEAD;
1080         qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
1081         BUG_ON(qmgr_stat_overflow(SEND_QID));
1082         return -EINPROGRESS;
1083 free_hmac_virt:
1084         if (req_ctx->hmac_virt) {
1085                 dma_pool_free(buffer_pool, req_ctx->hmac_virt,
1086                                 crypt->icv_rev_aes);
1087         }
1088 free_chain:
1089         free_buf_chain(dev, req_ctx->buffer, crypt->src_buf);
1090 out:
1091         crypt->ctl_flags = CTL_FLAG_UNUSED;
1092         return -ENOMEM;
1093 }
1094
1095 static int aead_setup(struct crypto_aead *tfm, unsigned int authsize)
1096 {
1097         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1098         u32 *flags = &tfm->base.crt_flags;
1099         unsigned digest_len = crypto_aead_alg(tfm)->maxauthsize;
1100         int ret;
1101
1102         if (!ctx->enckey_len && !ctx->authkey_len)
1103                 return 0;
1104         init_completion(&ctx->completion);
1105         atomic_inc(&ctx->configuring);
1106
1107         reset_sa_dir(&ctx->encrypt);
1108         reset_sa_dir(&ctx->decrypt);
1109
1110         ret = setup_cipher(&tfm->base, 0, ctx->enckey, ctx->enckey_len);
1111         if (ret)
1112                 goto out;
1113         ret = setup_cipher(&tfm->base, 1, ctx->enckey, ctx->enckey_len);
1114         if (ret)
1115                 goto out;
1116         ret = setup_auth(&tfm->base, 0, authsize, ctx->authkey,
1117                         ctx->authkey_len, digest_len);
1118         if (ret)
1119                 goto out;
1120         ret = setup_auth(&tfm->base, 1, authsize,  ctx->authkey,
1121                         ctx->authkey_len, digest_len);
1122         if (ret)
1123                 goto out;
1124
1125         if (*flags & CRYPTO_TFM_RES_WEAK_KEY) {
1126                 if (*flags & CRYPTO_TFM_REQ_WEAK_KEY) {
1127                         ret = -EINVAL;
1128                         goto out;
1129                 } else {
1130                         *flags &= ~CRYPTO_TFM_RES_WEAK_KEY;
1131                 }
1132         }
1133 out:
1134         if (!atomic_dec_and_test(&ctx->configuring))
1135                 wait_for_completion(&ctx->completion);
1136         return ret;
1137 }
1138
1139 static int aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
1140 {
1141         int max = crypto_aead_alg(tfm)->maxauthsize >> 2;
1142
1143         if ((authsize>>2) < 1 || (authsize>>2) > max || (authsize & 3))
1144                 return -EINVAL;
1145         return aead_setup(tfm, authsize);
1146 }
1147
1148 static int aead_setkey(struct crypto_aead *tfm, const u8 *key,
1149                         unsigned int keylen)
1150 {
1151         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1152         struct crypto_authenc_keys keys;
1153
1154         if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
1155                 goto badkey;
1156
1157         if (keys.authkeylen > sizeof(ctx->authkey))
1158                 goto badkey;
1159
1160         if (keys.enckeylen > sizeof(ctx->enckey))
1161                 goto badkey;
1162
1163         memcpy(ctx->authkey, keys.authkey, keys.authkeylen);
1164         memcpy(ctx->enckey, keys.enckey, keys.enckeylen);
1165         ctx->authkey_len = keys.authkeylen;
1166         ctx->enckey_len = keys.enckeylen;
1167
1168         return aead_setup(tfm, crypto_aead_authsize(tfm));
1169 badkey:
1170         crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
1171         return -EINVAL;
1172 }
1173
1174 static int aead_encrypt(struct aead_request *req)
1175 {
1176         unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req));
1177         return aead_perform(req, 1, req->assoclen + ivsize,
1178                         req->cryptlen, req->iv);
1179 }
1180
1181 static int aead_decrypt(struct aead_request *req)
1182 {
1183         unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req));
1184         return aead_perform(req, 0, req->assoclen + ivsize,
1185                         req->cryptlen, req->iv);
1186 }
1187
1188 static int aead_givencrypt(struct aead_givcrypt_request *req)
1189 {
1190         struct crypto_aead *tfm = aead_givcrypt_reqtfm(req);
1191         struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
1192         unsigned len, ivsize = crypto_aead_ivsize(tfm);
1193         __be64 seq;
1194
1195         /* copied from eseqiv.c */
1196         if (!ctx->salted) {
1197                 get_random_bytes(ctx->salt, ivsize);
1198                 ctx->salted = 1;
1199         }
1200         memcpy(req->areq.iv, ctx->salt, ivsize);
1201         len = ivsize;
1202         if (ivsize > sizeof(u64)) {
1203                 memset(req->giv, 0, ivsize - sizeof(u64));
1204                 len = sizeof(u64);
1205         }
1206         seq = cpu_to_be64(req->seq);
1207         memcpy(req->giv + ivsize - len, &seq, len);
1208         return aead_perform(&req->areq, 1, req->areq.assoclen,
1209                         req->areq.cryptlen +ivsize, req->giv);
1210 }
1211
1212 static struct ixp_alg ixp4xx_algos[] = {
1213 {
1214         .crypto = {
1215                 .cra_name       = "cbc(des)",
1216                 .cra_blocksize  = DES_BLOCK_SIZE,
1217                 .cra_u          = { .ablkcipher = {
1218                         .min_keysize    = DES_KEY_SIZE,
1219                         .max_keysize    = DES_KEY_SIZE,
1220                         .ivsize         = DES_BLOCK_SIZE,
1221                         .geniv          = "eseqiv",
1222                         }
1223                 }
1224         },
1225         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1226         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1227
1228 }, {
1229         .crypto = {
1230                 .cra_name       = "ecb(des)",
1231                 .cra_blocksize  = DES_BLOCK_SIZE,
1232                 .cra_u          = { .ablkcipher = {
1233                         .min_keysize    = DES_KEY_SIZE,
1234                         .max_keysize    = DES_KEY_SIZE,
1235                         }
1236                 }
1237         },
1238         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_ECB | KEYLEN_192,
1239         .cfg_dec = CIPH_DECR | MOD_DES | MOD_ECB | KEYLEN_192,
1240 }, {
1241         .crypto = {
1242                 .cra_name       = "cbc(des3_ede)",
1243                 .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1244                 .cra_u          = { .ablkcipher = {
1245                         .min_keysize    = DES3_EDE_KEY_SIZE,
1246                         .max_keysize    = DES3_EDE_KEY_SIZE,
1247                         .ivsize         = DES3_EDE_BLOCK_SIZE,
1248                         .geniv          = "eseqiv",
1249                         }
1250                 }
1251         },
1252         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1253         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1254 }, {
1255         .crypto = {
1256                 .cra_name       = "ecb(des3_ede)",
1257                 .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1258                 .cra_u          = { .ablkcipher = {
1259                         .min_keysize    = DES3_EDE_KEY_SIZE,
1260                         .max_keysize    = DES3_EDE_KEY_SIZE,
1261                         }
1262                 }
1263         },
1264         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_ECB | KEYLEN_192,
1265         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_ECB | KEYLEN_192,
1266 }, {
1267         .crypto = {
1268                 .cra_name       = "cbc(aes)",
1269                 .cra_blocksize  = AES_BLOCK_SIZE,
1270                 .cra_u          = { .ablkcipher = {
1271                         .min_keysize    = AES_MIN_KEY_SIZE,
1272                         .max_keysize    = AES_MAX_KEY_SIZE,
1273                         .ivsize         = AES_BLOCK_SIZE,
1274                         .geniv          = "eseqiv",
1275                         }
1276                 }
1277         },
1278         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1279         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1280 }, {
1281         .crypto = {
1282                 .cra_name       = "ecb(aes)",
1283                 .cra_blocksize  = AES_BLOCK_SIZE,
1284                 .cra_u          = { .ablkcipher = {
1285                         .min_keysize    = AES_MIN_KEY_SIZE,
1286                         .max_keysize    = AES_MAX_KEY_SIZE,
1287                         }
1288                 }
1289         },
1290         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_ECB,
1291         .cfg_dec = CIPH_DECR | MOD_AES | MOD_ECB,
1292 }, {
1293         .crypto = {
1294                 .cra_name       = "ctr(aes)",
1295                 .cra_blocksize  = AES_BLOCK_SIZE,
1296                 .cra_u          = { .ablkcipher = {
1297                         .min_keysize    = AES_MIN_KEY_SIZE,
1298                         .max_keysize    = AES_MAX_KEY_SIZE,
1299                         .ivsize         = AES_BLOCK_SIZE,
1300                         .geniv          = "eseqiv",
1301                         }
1302                 }
1303         },
1304         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
1305         .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
1306 }, {
1307         .crypto = {
1308                 .cra_name       = "rfc3686(ctr(aes))",
1309                 .cra_blocksize  = AES_BLOCK_SIZE,
1310                 .cra_u          = { .ablkcipher = {
1311                         .min_keysize    = AES_MIN_KEY_SIZE,
1312                         .max_keysize    = AES_MAX_KEY_SIZE,
1313                         .ivsize         = AES_BLOCK_SIZE,
1314                         .geniv          = "eseqiv",
1315                         .setkey         = ablk_rfc3686_setkey,
1316                         .encrypt        = ablk_rfc3686_crypt,
1317                         .decrypt        = ablk_rfc3686_crypt }
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       = "authenc(hmac(md5),cbc(des))",
1325                 .cra_blocksize  = DES_BLOCK_SIZE,
1326                 .cra_u          = { .aead = {
1327                         .ivsize         = DES_BLOCK_SIZE,
1328                         .maxauthsize    = MD5_DIGEST_SIZE,
1329                         }
1330                 }
1331         },
1332         .hash = &hash_alg_md5,
1333         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1334         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1335 }, {
1336         .crypto = {
1337                 .cra_name       = "authenc(hmac(md5),cbc(des3_ede))",
1338                 .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1339                 .cra_u          = { .aead = {
1340                         .ivsize         = DES3_EDE_BLOCK_SIZE,
1341                         .maxauthsize    = MD5_DIGEST_SIZE,
1342                         }
1343                 }
1344         },
1345         .hash = &hash_alg_md5,
1346         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1347         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1348 }, {
1349         .crypto = {
1350                 .cra_name       = "authenc(hmac(sha1),cbc(des))",
1351                 .cra_blocksize  = DES_BLOCK_SIZE,
1352                 .cra_u          = { .aead = {
1353                         .ivsize         = DES_BLOCK_SIZE,
1354                         .maxauthsize    = SHA1_DIGEST_SIZE,
1355                         }
1356                 }
1357         },
1358         .hash = &hash_alg_sha1,
1359         .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
1360         .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
1361 }, {
1362         .crypto = {
1363                 .cra_name       = "authenc(hmac(sha1),cbc(des3_ede))",
1364                 .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
1365                 .cra_u          = { .aead = {
1366                         .ivsize         = DES3_EDE_BLOCK_SIZE,
1367                         .maxauthsize    = SHA1_DIGEST_SIZE,
1368                         }
1369                 }
1370         },
1371         .hash = &hash_alg_sha1,
1372         .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
1373         .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
1374 }, {
1375         .crypto = {
1376                 .cra_name       = "authenc(hmac(md5),cbc(aes))",
1377                 .cra_blocksize  = AES_BLOCK_SIZE,
1378                 .cra_u          = { .aead = {
1379                         .ivsize         = AES_BLOCK_SIZE,
1380                         .maxauthsize    = MD5_DIGEST_SIZE,
1381                         }
1382                 }
1383         },
1384         .hash = &hash_alg_md5,
1385         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1386         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1387 }, {
1388         .crypto = {
1389                 .cra_name       = "authenc(hmac(sha1),cbc(aes))",
1390                 .cra_blocksize  = AES_BLOCK_SIZE,
1391                 .cra_u          = { .aead = {
1392                         .ivsize         = AES_BLOCK_SIZE,
1393                         .maxauthsize    = SHA1_DIGEST_SIZE,
1394                         }
1395                 }
1396         },
1397         .hash = &hash_alg_sha1,
1398         .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
1399         .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
1400 } };
1401
1402 #define IXP_POSTFIX "-ixp4xx"
1403
1404 static const struct platform_device_info ixp_dev_info __initdata = {
1405         .name           = DRIVER_NAME,
1406         .id             = 0,
1407         .dma_mask       = DMA_BIT_MASK(32),
1408 };
1409
1410 static int __init ixp_module_init(void)
1411 {
1412         int num = ARRAY_SIZE(ixp4xx_algos);
1413         int i, err ;
1414
1415         pdev = platform_device_register_full(&ixp_dev_info);
1416         if (IS_ERR(pdev))
1417                 return PTR_ERR(pdev);
1418
1419         dev = &pdev->dev;
1420
1421         spin_lock_init(&desc_lock);
1422         spin_lock_init(&emerg_lock);
1423
1424         err = init_ixp_crypto(&pdev->dev);
1425         if (err) {
1426                 platform_device_unregister(pdev);
1427                 return err;
1428         }
1429         for (i=0; i< num; i++) {
1430                 struct crypto_alg *cra = &ixp4xx_algos[i].crypto;
1431
1432                 if (snprintf(cra->cra_driver_name, CRYPTO_MAX_ALG_NAME,
1433                         "%s"IXP_POSTFIX, cra->cra_name) >=
1434                         CRYPTO_MAX_ALG_NAME)
1435                 {
1436                         continue;
1437                 }
1438                 if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES)) {
1439                         continue;
1440                 }
1441                 if (!ixp4xx_algos[i].hash) {
1442                         /* block ciphers */
1443                         cra->cra_type = &crypto_ablkcipher_type;
1444                         cra->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
1445                                          CRYPTO_ALG_KERN_DRIVER_ONLY |
1446                                          CRYPTO_ALG_ASYNC;
1447                         if (!cra->cra_ablkcipher.setkey)
1448                                 cra->cra_ablkcipher.setkey = ablk_setkey;
1449                         if (!cra->cra_ablkcipher.encrypt)
1450                                 cra->cra_ablkcipher.encrypt = ablk_encrypt;
1451                         if (!cra->cra_ablkcipher.decrypt)
1452                                 cra->cra_ablkcipher.decrypt = ablk_decrypt;
1453                         cra->cra_init = init_tfm_ablk;
1454                 } else {
1455                         /* authenc */
1456                         cra->cra_type = &crypto_aead_type;
1457                         cra->cra_flags = CRYPTO_ALG_TYPE_AEAD |
1458                                          CRYPTO_ALG_KERN_DRIVER_ONLY |
1459                                          CRYPTO_ALG_ASYNC;
1460                         cra->cra_aead.setkey = aead_setkey;
1461                         cra->cra_aead.setauthsize = aead_setauthsize;
1462                         cra->cra_aead.encrypt = aead_encrypt;
1463                         cra->cra_aead.decrypt = aead_decrypt;
1464                         cra->cra_aead.givencrypt = aead_givencrypt;
1465                         cra->cra_init = init_tfm_aead;
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         return 0;
1479 }
1480
1481 static void __exit ixp_module_exit(void)
1482 {
1483         int num = ARRAY_SIZE(ixp4xx_algos);
1484         int i;
1485
1486         for (i=0; i< num; i++) {
1487                 if (ixp4xx_algos[i].registered)
1488                         crypto_unregister_alg(&ixp4xx_algos[i].crypto);
1489         }
1490         release_ixp_crypto(&pdev->dev);
1491         platform_device_unregister(pdev);
1492 }
1493
1494 module_init(ixp_module_init);
1495 module_exit(ixp_module_exit);
1496
1497 MODULE_LICENSE("GPL");
1498 MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>");
1499 MODULE_DESCRIPTION("IXP4xx hardware crypto");
1500