drivers/crypto/armv8/rte_armv8_pmd.c

   1 /*
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (C) Cavium networks Ltd. 2017.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of Cavium networks nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <stdbool.h>
  34
  35 #include <rte_common.h>
  36 #include <rte_hexdump.h>
  37 #include <rte_cryptodev.h>
  38 #include <rte_cryptodev_pmd.h>
  39 #include <rte_cryptodev_vdev.h>
  40 #include <rte_vdev.h>
  41 #include <rte_malloc.h>
  42 #include <rte_cpuflags.h>
  43
  44 #include "armv8_crypto_defs.h"
  45
  46 #include "rte_armv8_pmd_private.h"
  47
  48 static uint8_t cryptodev_driver_id;
  49
  50 static int cryptodev_armv8_crypto_uninit(struct rte_vdev_device *vdev);
  51
  52 /**
  53  * Pointers to the supported combined mode crypto functions are stored
  54  * in the static tables. Each combined (chained) cryptographic operation
  55  * can be described by a set of numbers:
  56  * - order:     order of operations (cipher, auth) or (auth, cipher)
  57  * - direction: encryption or decryption
  58  * - calg:      cipher algorithm such as AES_CBC, AES_CTR, etc.
  59  * - aalg:      authentication algorithm such as SHA1, SHA256, etc.
  60  * - keyl:      cipher key length, for example 128, 192, 256 bits
  61  *
  62  * In order to quickly acquire each function pointer based on those numbers,
  63  * a hierarchy of arrays is maintained. The final level, 3D array is indexed
  64  * by the combined mode function parameters only (cipher algorithm,
  65  * authentication algorithm and key length).
  66  *
  67  * This gives 3 memory accesses to obtain a function pointer instead of
  68  * traversing the array manually and comparing function parameters on each loop.
  69  *
  70  *                   +--+CRYPTO_FUNC
  71  *            +--+ENC|
  72  *      +--+CA|
  73  *      |     +--+DEC
  74  * ORDER|
  75  *      |     +--+ENC
  76  *      +--+AC|
  77  *            +--+DEC
  78  *
  79  */
  80
  81 /**
  82  * 3D array type for ARM Combined Mode crypto functions pointers.
  83  * CRYPTO_CIPHER_MAX:                   max cipher ID number
  84  * CRYPTO_AUTH_MAX:                     max auth ID number
  85  * CRYPTO_CIPHER_KEYLEN_MAX:            max key length ID number
  86  */
  87 typedef const crypto_func_t
  88 crypto_func_tbl_t[CRYPTO_CIPHER_MAX][CRYPTO_AUTH_MAX][CRYPTO_CIPHER_KEYLEN_MAX];
  89
  90 /* Evaluate to key length definition */
  91 #define KEYL(keyl)              (ARMV8_CRYPTO_CIPHER_KEYLEN_ ## keyl)
  92
  93 /* Local aliases for supported ciphers */
  94 #define CIPH_AES_CBC            RTE_CRYPTO_CIPHER_AES_CBC
  95 /* Local aliases for supported hashes */
  96 #define AUTH_SHA1_HMAC          RTE_CRYPTO_AUTH_SHA1_HMAC
  97 #define AUTH_SHA256_HMAC        RTE_CRYPTO_AUTH_SHA256_HMAC
  98
  99 /**
 100  * Arrays containing pointers to particular cryptographic,
 101  * combined mode functions.
 102  * crypto_op_ca_encrypt:        cipher (encrypt), authenticate
 103  * crypto_op_ca_decrypt:        cipher (decrypt), authenticate
 104  * crypto_op_ac_encrypt:        authenticate, cipher (encrypt)
 105  * crypto_op_ac_decrypt:        authenticate, cipher (decrypt)
 106  */
 107 static const crypto_func_tbl_t
 108 crypto_op_ca_encrypt = {
 109         /* [cipher alg][auth alg][key length] = crypto_function, */
 110         [CIPH_AES_CBC][AUTH_SHA1_HMAC][KEYL(128)] = aes128cbc_sha1_hmac,
 111         [CIPH_AES_CBC][AUTH_SHA256_HMAC][KEYL(128)] = aes128cbc_sha256_hmac,
 112 };
 113
 114 static const crypto_func_tbl_t
 115 crypto_op_ca_decrypt = {
 116         NULL
 117 };
 118
 119 static const crypto_func_tbl_t
 120 crypto_op_ac_encrypt = {
 121         NULL
 122 };
 123
 124 static const crypto_func_tbl_t
 125 crypto_op_ac_decrypt = {
 126         /* [cipher alg][auth alg][key length] = crypto_function, */
 127         [CIPH_AES_CBC][AUTH_SHA1_HMAC][KEYL(128)] = sha1_hmac_aes128cbc_dec,
 128         [CIPH_AES_CBC][AUTH_SHA256_HMAC][KEYL(128)] = sha256_hmac_aes128cbc_dec,
 129 };
 130
 131 /**
 132  * Arrays containing pointers to particular cryptographic function sets,
 133  * covering given cipher operation directions (encrypt, decrypt)
 134  * for each order of cipher and authentication pairs.
 135  */
 136 static const crypto_func_tbl_t *
 137 crypto_cipher_auth[] = {
 138         &crypto_op_ca_encrypt,
 139         &crypto_op_ca_decrypt,
 140         NULL
 141 };
 142
 143 static const crypto_func_tbl_t *
 144 crypto_auth_cipher[] = {
 145         &crypto_op_ac_encrypt,
 146         &crypto_op_ac_decrypt,
 147         NULL
 148 };
 149
 150 /**
 151  * Top level array containing pointers to particular cryptographic
 152  * function sets, covering given order of chained operations.
 153  * crypto_cipher_auth:  cipher first, authenticate after
 154  * crypto_auth_cipher:  authenticate first, cipher after
 155  */
 156 static const crypto_func_tbl_t **
 157 crypto_chain_order[] = {
 158         crypto_cipher_auth,
 159         crypto_auth_cipher,
 160         NULL
 161 };
 162
 163 /**
 164  * Extract particular combined mode crypto function from the 3D array.
 165  */
 166 #define CRYPTO_GET_ALGO(order, cop, calg, aalg, keyl)                   \
 167 ({                                                                      \
 168         crypto_func_tbl_t *func_tbl =                                   \
 169                                 (crypto_chain_order[(order)])[(cop)];   \
 170                                                                         \
 171         ((*func_tbl)[(calg)][(aalg)][KEYL(keyl)]);              \
 172 })
 173
 174 /*----------------------------------------------------------------------------*/
 175
 176 /**
 177  * 2D array type for ARM key schedule functions pointers.
 178  * CRYPTO_CIPHER_MAX:                   max cipher ID number
 179  * CRYPTO_CIPHER_KEYLEN_MAX:            max key length ID number
 180  */
 181 typedef const crypto_key_sched_t
 182 crypto_key_sched_tbl_t[CRYPTO_CIPHER_MAX][CRYPTO_CIPHER_KEYLEN_MAX];
 183
 184 static const crypto_key_sched_tbl_t
 185 crypto_key_sched_encrypt = {
 186         /* [cipher alg][key length] = key_expand_func, */
 187         [CIPH_AES_CBC][KEYL(128)] = aes128_key_sched_enc,
 188 };
 189
 190 static const crypto_key_sched_tbl_t
 191 crypto_key_sched_decrypt = {
 192         /* [cipher alg][key length] = key_expand_func, */
 193         [CIPH_AES_CBC][KEYL(128)] = aes128_key_sched_dec,
 194 };
 195
 196 /**
 197  * Top level array containing pointers to particular key generation
 198  * function sets, covering given operation direction.
 199  * crypto_key_sched_encrypt:    keys for encryption
 200  * crypto_key_sched_decrypt:    keys for decryption
 201  */
 202 static const crypto_key_sched_tbl_t *
 203 crypto_key_sched_dir[] = {
 204         &crypto_key_sched_encrypt,
 205         &crypto_key_sched_decrypt,
 206         NULL
 207 };
 208
 209 /**
 210  * Extract particular combined mode crypto function from the 3D array.
 211  */
 212 #define CRYPTO_GET_KEY_SCHED(cop, calg, keyl)                           \
 213 ({                                                                      \
 214         crypto_key_sched_tbl_t *ks_tbl = crypto_key_sched_dir[(cop)];   \
 215                                                                         \
 216         ((*ks_tbl)[(calg)][KEYL(keyl)]);                                \
 217 })
 218
 219 /*----------------------------------------------------------------------------*/
 220
 221 /*
 222  *------------------------------------------------------------------------------
 223  * Session Prepare
 224  *------------------------------------------------------------------------------
 225  */
 226
 227 /** Get xform chain order */
 228 static enum armv8_crypto_chain_order
 229 armv8_crypto_get_chain_order(const struct rte_crypto_sym_xform *xform)
 230 {
 231
 232         /*
 233          * This driver currently covers only chained operations.
 234          * Ignore only cipher or only authentication operations
 235          * or chains longer than 2 xform structures.
 236          */
 237         if (xform->next == NULL || xform->next->next != NULL)
 238                 return ARMV8_CRYPTO_CHAIN_NOT_SUPPORTED;
 239
 240         if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH) {
 241                 if (xform->next->type == RTE_CRYPTO_SYM_XFORM_CIPHER)
 242                         return ARMV8_CRYPTO_CHAIN_AUTH_CIPHER;
 243         }
 244
 245         if (xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER) {
 246                 if (xform->next->type == RTE_CRYPTO_SYM_XFORM_AUTH)
 247                         return ARMV8_CRYPTO_CHAIN_CIPHER_AUTH;
 248         }
 249
 250         return ARMV8_CRYPTO_CHAIN_NOT_SUPPORTED;
 251 }
 252
 253 static inline void
 254 auth_hmac_pad_prepare(struct armv8_crypto_session *sess,
 255                                 const struct rte_crypto_sym_xform *xform)
 256 {
 257         size_t i;
 258
 259         /* Generate i_key_pad and o_key_pad */
 260         memset(sess->auth.hmac.i_key_pad, 0, sizeof(sess->auth.hmac.i_key_pad));
 261         rte_memcpy(sess->auth.hmac.i_key_pad, sess->auth.hmac.key,
 262                                                         xform->auth.key.length);
 263         memset(sess->auth.hmac.o_key_pad, 0, sizeof(sess->auth.hmac.o_key_pad));
 264         rte_memcpy(sess->auth.hmac.o_key_pad, sess->auth.hmac.key,
 265                                                         xform->auth.key.length);
 266         /*
 267          * XOR key with IPAD/OPAD values to obtain i_key_pad
 268          * and o_key_pad.
 269          * Byte-by-byte operation may seem to be the less efficient
 270          * here but in fact it's the opposite.
 271          * The result ASM code is likely operate on NEON registers
 272          * (load auth key to Qx, load IPAD/OPAD to multiple
 273          * elements of Qy, eor 128 bits at once).
 274          */
 275         for (i = 0; i < SHA_BLOCK_MAX; i++) {
 276                 sess->auth.hmac.i_key_pad[i] ^= HMAC_IPAD_VALUE;
 277                 sess->auth.hmac.o_key_pad[i] ^= HMAC_OPAD_VALUE;
 278         }
 279 }
 280
 281 static inline int
 282 auth_set_prerequisites(struct armv8_crypto_session *sess,
 283                         const struct rte_crypto_sym_xform *xform)
 284 {
 285         uint8_t partial[64] = { 0 };
 286         int error;
 287
 288         switch (xform->auth.algo) {
 289         case RTE_CRYPTO_AUTH_SHA1_HMAC:
 290                 /*
 291                  * Generate authentication key, i_key_pad and o_key_pad.
 292                  */
 293                 /* Zero memory under key */
 294                 memset(sess->auth.hmac.key, 0, SHA1_AUTH_KEY_LENGTH);
 295
 296                 if (xform->auth.key.length > SHA1_AUTH_KEY_LENGTH) {
 297                         /*
 298                          * In case the key is longer than 160 bits
 299                          * the algorithm will use SHA1(key) instead.
 300                          */
 301                         error = sha1_block(NULL, xform->auth.key.data,
 302                                 sess->auth.hmac.key, xform->auth.key.length);
 303                         if (error != 0)
 304                                 return -1;
 305                 } else {
 306                         /*
 307                          * Now copy the given authentication key to the session
 308                          * key assuming that the session key is zeroed there is
 309                          * no need for additional zero padding if the key is
 310                          * shorter than SHA1_AUTH_KEY_LENGTH.
 311                          */
 312                         rte_memcpy(sess->auth.hmac.key, xform->auth.key.data,
 313                                                         xform->auth.key.length);
 314                 }
 315
 316                 /* Prepare HMAC padding: key|pattern */
 317                 auth_hmac_pad_prepare(sess, xform);
 318                 /*
 319                  * Calculate partial hash values for i_key_pad and o_key_pad.
 320                  * Will be used as initialization state for final HMAC.
 321                  */
 322                 error = sha1_block_partial(NULL, sess->auth.hmac.i_key_pad,
 323                     partial, SHA1_BLOCK_SIZE);
 324                 if (error != 0)
 325                         return -1;
 326                 memcpy(sess->auth.hmac.i_key_pad, partial, SHA1_BLOCK_SIZE);
 327
 328                 error = sha1_block_partial(NULL, sess->auth.hmac.o_key_pad,
 329                     partial, SHA1_BLOCK_SIZE);
 330                 if (error != 0)
 331                         return -1;
 332                 memcpy(sess->auth.hmac.o_key_pad, partial, SHA1_BLOCK_SIZE);
 333
 334                 break;
 335         case RTE_CRYPTO_AUTH_SHA256_HMAC:
 336                 /*
 337                  * Generate authentication key, i_key_pad and o_key_pad.
 338                  */
 339                 /* Zero memory under key */
 340                 memset(sess->auth.hmac.key, 0, SHA256_AUTH_KEY_LENGTH);
 341
 342                 if (xform->auth.key.length > SHA256_AUTH_KEY_LENGTH) {
 343                         /*
 344                          * In case the key is longer than 256 bits
 345                          * the algorithm will use SHA256(key) instead.
 346                          */
 347                         error = sha256_block(NULL, xform->auth.key.data,
 348                                 sess->auth.hmac.key, xform->auth.key.length);
 349                         if (error != 0)
 350                                 return -1;
 351                 } else {
 352                         /*
 353                          * Now copy the given authentication key to the session
 354                          * key assuming that the session key is zeroed there is
 355                          * no need for additional zero padding if the key is
 356                          * shorter than SHA256_AUTH_KEY_LENGTH.
 357                          */
 358                         rte_memcpy(sess->auth.hmac.key, xform->auth.key.data,
 359                                                         xform->auth.key.length);
 360                 }
 361
 362                 /* Prepare HMAC padding: key|pattern */
 363                 auth_hmac_pad_prepare(sess, xform);
 364                 /*
 365                  * Calculate partial hash values for i_key_pad and o_key_pad.
 366                  * Will be used as initialization state for final HMAC.
 367                  */
 368                 error = sha256_block_partial(NULL, sess->auth.hmac.i_key_pad,
 369                     partial, SHA256_BLOCK_SIZE);
 370                 if (error != 0)
 371                         return -1;
 372                 memcpy(sess->auth.hmac.i_key_pad, partial, SHA256_BLOCK_SIZE);
 373
 374                 error = sha256_block_partial(NULL, sess->auth.hmac.o_key_pad,
 375                     partial, SHA256_BLOCK_SIZE);
 376                 if (error != 0)
 377                         return -1;
 378                 memcpy(sess->auth.hmac.o_key_pad, partial, SHA256_BLOCK_SIZE);
 379
 380                 break;
 381         default:
 382                 break;
 383         }
 384
 385         return 0;
 386 }
 387
 388 static inline int
 389 cipher_set_prerequisites(struct armv8_crypto_session *sess,
 390                         const struct rte_crypto_sym_xform *xform)
 391 {
 392         crypto_key_sched_t cipher_key_sched;
 393
 394         cipher_key_sched = sess->cipher.key_sched;
 395         if (likely(cipher_key_sched != NULL)) {
 396                 /* Set up cipher session key */
 397                 cipher_key_sched(sess->cipher.key.data, xform->cipher.key.data);
 398         }
 399
 400         return 0;
 401 }
 402
 403 static int
 404 armv8_crypto_set_session_chained_parameters(struct armv8_crypto_session *sess,
 405                 const struct rte_crypto_sym_xform *cipher_xform,
 406                 const struct rte_crypto_sym_xform *auth_xform)
 407 {
 408         enum armv8_crypto_chain_order order;
 409         enum armv8_crypto_cipher_operation cop;
 410         enum rte_crypto_cipher_algorithm calg;
 411         enum rte_crypto_auth_algorithm aalg;
 412
 413         /* Validate and prepare scratch order of combined operations */
 414         switch (sess->chain_order) {
 415         case ARMV8_CRYPTO_CHAIN_CIPHER_AUTH:
 416         case ARMV8_CRYPTO_CHAIN_AUTH_CIPHER:
 417                 order = sess->chain_order;
 418                 break;
 419         default:
 420                 return -EINVAL;
 421         }
 422         /* Select cipher direction */
 423         sess->cipher.direction = cipher_xform->cipher.op;
 424         /* Select cipher key */
 425         sess->cipher.key.length = cipher_xform->cipher.key.length;
 426         /* Set cipher direction */
 427         cop = sess->cipher.direction;
 428         /* Set cipher algorithm */
 429         calg = cipher_xform->cipher.algo;
 430
 431         /* Select cipher algo */
 432         switch (calg) {
 433         /* Cover supported cipher algorithms */
 434         case RTE_CRYPTO_CIPHER_AES_CBC:
 435                 sess->cipher.algo = calg;
 436                 /* IV len is always 16 bytes (block size) for AES CBC */
 437                 sess->cipher.iv.length = 16;
 438                 break;
 439         default:
 440                 return -EINVAL;
 441         }
 442         /* Select auth generate/verify */
 443         sess->auth.operation = auth_xform->auth.op;
 444
 445         /* Select auth algo */
 446         switch (auth_xform->auth.algo) {
 447         /* Cover supported hash algorithms */
 448         case RTE_CRYPTO_AUTH_SHA1_HMAC:
 449         case RTE_CRYPTO_AUTH_SHA256_HMAC: /* Fall through */
 450                 aalg = auth_xform->auth.algo;
 451                 sess->auth.mode = ARMV8_CRYPTO_AUTH_AS_HMAC;
 452                 break;
 453         default:
 454                 return -EINVAL;
 455         }
 456
 457         /* Set the digest length */
 458         sess->auth.digest_length = auth_xform->auth.digest_length;
 459
 460         /* Verify supported key lengths and extract proper algorithm */
 461         switch (cipher_xform->cipher.key.length << 3) {
 462         case 128:
 463                 sess->crypto_func =
 464                                 CRYPTO_GET_ALGO(order, cop, calg, aalg, 128);
 465                 sess->cipher.key_sched =
 466                                 CRYPTO_GET_KEY_SCHED(cop, calg, 128);
 467                 break;
 468         case 192:
 469         case 256:
 470                 /* These key lengths are not supported yet */
 471         default: /* Fall through */
 472                 sess->crypto_func = NULL;
 473                 sess->cipher.key_sched = NULL;
 474                 return -EINVAL;
 475         }
 476
 477         if (unlikely(sess->crypto_func == NULL)) {
 478                 /*
 479                  * If we got here that means that there must be a bug
 480                  * in the algorithms selection above. Nevertheless keep
 481                  * it here to catch bug immediately and avoid NULL pointer
 482                  * dereference in OPs processing.
 483                  */
 484                 ARMV8_CRYPTO_LOG_ERR(
 485                         "No appropriate crypto function for given parameters");
 486                 return -EINVAL;
 487         }
 488
 489         /* Set up cipher session prerequisites */
 490         if (cipher_set_prerequisites(sess, cipher_xform) != 0)
 491                 return -EINVAL;
 492
 493         /* Set up authentication session prerequisites */
 494         if (auth_set_prerequisites(sess, auth_xform) != 0)
 495                 return -EINVAL;
 496
 497         return 0;
 498 }
 499
 500 /** Parse crypto xform chain and set private session parameters */
 501 int
 502 armv8_crypto_set_session_parameters(struct armv8_crypto_session *sess,
 503                 const struct rte_crypto_sym_xform *xform)
 504 {
 505         const struct rte_crypto_sym_xform *cipher_xform = NULL;
 506         const struct rte_crypto_sym_xform *auth_xform = NULL;
 507         bool is_chained_op;
 508         int ret;
 509
 510         /* Filter out spurious/broken requests */
 511         if (xform == NULL)
 512                 return -EINVAL;
 513
 514         sess->chain_order = armv8_crypto_get_chain_order(xform);
 515         switch (sess->chain_order) {
 516         case ARMV8_CRYPTO_CHAIN_CIPHER_AUTH:
 517                 cipher_xform = xform;
 518                 auth_xform = xform->next;
 519                 is_chained_op = true;
 520                 break;
 521         case ARMV8_CRYPTO_CHAIN_AUTH_CIPHER:
 522                 auth_xform = xform;
 523                 cipher_xform = xform->next;
 524                 is_chained_op = true;
 525                 break;
 526         default:
 527                 is_chained_op = false;
 528                 return -EINVAL;
 529         }
 530
 531         /* Set IV offset */
 532         sess->cipher.iv.offset = cipher_xform->cipher.iv.offset;
 533
 534         if (is_chained_op) {
 535                 ret = armv8_crypto_set_session_chained_parameters(sess,
 536                                                 cipher_xform, auth_xform);
 537                 if (unlikely(ret != 0)) {
 538                         ARMV8_CRYPTO_LOG_ERR(
 539                         "Invalid/unsupported chained (cipher/auth) parameters");
 540                         return -EINVAL;
 541                 }
 542         } else {
 543                 ARMV8_CRYPTO_LOG_ERR("Invalid/unsupported operation");
 544                 return -EINVAL;
 545         }
 546
 547         return 0;
 548 }
 549
 550 /** Provide session for operation */
 551 static inline struct armv8_crypto_session *
 552 get_session(struct armv8_crypto_qp *qp, struct rte_crypto_op *op)
 553 {
 554         struct armv8_crypto_session *sess = NULL;
 555
 556         if (op->sess_type == RTE_CRYPTO_OP_WITH_SESSION) {
 557                 /* get existing session */
 558                 if (likely(op->sym->session != NULL &&
 559                                 op->sym->session->driver_id ==
 560                                 cryptodev_driver_id)) {
 561                         sess = (struct armv8_crypto_session *)
 562                                 op->sym->session->_private;
 563                 }
 564         } else {
 565                 /* provide internal session */
 566                 void *_sess = NULL;
 567
 568                 if (!rte_mempool_get(qp->sess_mp, (void **)&_sess)) {
 569                         sess = (struct armv8_crypto_session *)
 570                                 ((struct rte_cryptodev_sym_session *)_sess)
 571                                 ->_private;
 572
 573                         if (unlikely(armv8_crypto_set_session_parameters(
 574                                         sess, op->sym->xform) != 0)) {
 575                                 rte_mempool_put(qp->sess_mp, _sess);
 576                                 sess = NULL;
 577                         } else
 578                                 op->sym->session = _sess;
 579                 }
 580         }
 581
 582         if (unlikely(sess == NULL))
 583                 op->status = RTE_CRYPTO_OP_STATUS_INVALID_SESSION;
 584
 585         return sess;
 586 }
 587
 588 /*
 589  *------------------------------------------------------------------------------
 590  * Process Operations
 591  *------------------------------------------------------------------------------
 592  */
 593
 594 /*----------------------------------------------------------------------------*/
 595
 596 /** Process cipher operation */
 597 static inline void
 598 process_armv8_chained_op
 599                 (struct rte_crypto_op *op, struct armv8_crypto_session *sess,
 600                 struct rte_mbuf *mbuf_src, struct rte_mbuf *mbuf_dst)
 601 {
 602         crypto_func_t crypto_func;
 603         crypto_arg_t arg;
 604         struct rte_mbuf *m_asrc, *m_adst;
 605         uint8_t *csrc, *cdst;
 606         uint8_t *adst, *asrc;
 607         uint64_t clen, alen;
 608         int error;
 609
 610         clen = op->sym->cipher.data.length;
 611         alen = op->sym->auth.data.length;
 612
 613         csrc = rte_pktmbuf_mtod_offset(mbuf_src, uint8_t *,
 614                         op->sym->cipher.data.offset);
 615         cdst = rte_pktmbuf_mtod_offset(mbuf_dst, uint8_t *,
 616                         op->sym->cipher.data.offset);
 617
 618         switch (sess->chain_order) {
 619         case ARMV8_CRYPTO_CHAIN_CIPHER_AUTH:
 620                 m_asrc = m_adst = mbuf_dst;
 621                 break;
 622         case ARMV8_CRYPTO_CHAIN_AUTH_CIPHER:
 623                 m_asrc = mbuf_src;
 624                 m_adst = mbuf_dst;
 625                 break;
 626         default:
 627                 op->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 628                 return;
 629         }
 630         asrc = rte_pktmbuf_mtod_offset(m_asrc, uint8_t *,
 631                                 op->sym->auth.data.offset);
 632
 633         switch (sess->auth.mode) {
 634         case ARMV8_CRYPTO_AUTH_AS_AUTH:
 635                 /* Nothing to do here, just verify correct option */
 636                 break;
 637         case ARMV8_CRYPTO_AUTH_AS_HMAC:
 638                 arg.digest.hmac.key = sess->auth.hmac.key;
 639                 arg.digest.hmac.i_key_pad = sess->auth.hmac.i_key_pad;
 640                 arg.digest.hmac.o_key_pad = sess->auth.hmac.o_key_pad;
 641                 break;
 642         default:
 643                 op->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 644                 return;
 645         }
 646
 647         if (sess->auth.operation == RTE_CRYPTO_AUTH_OP_GENERATE) {
 648                 adst = op->sym->auth.digest.data;
 649                 if (adst == NULL) {
 650                         adst = rte_pktmbuf_mtod_offset(m_adst,
 651                                         uint8_t *,
 652                                         op->sym->auth.data.offset +
 653                                         op->sym->auth.data.length);
 654                 }
 655         } else {
 656                 adst = (uint8_t *)rte_pktmbuf_append(m_asrc,
 657                                 sess->auth.digest_length);
 658         }
 659
 660         arg.cipher.iv = rte_crypto_op_ctod_offset(op, uint8_t *,
 661                                         sess->cipher.iv.offset);
 662         arg.cipher.key = sess->cipher.key.data;
 663         /* Acquire combined mode function */
 664         crypto_func = sess->crypto_func;
 665         ARMV8_CRYPTO_ASSERT(crypto_func != NULL);
 666         error = crypto_func(csrc, cdst, clen, asrc, adst, alen, &arg);
 667         if (error != 0) {
 668                 op->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 669                 return;
 670         }
 671
 672         op->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
 673         if (sess->auth.operation == RTE_CRYPTO_AUTH_OP_VERIFY) {
 674                 if (memcmp(adst, op->sym->auth.digest.data,
 675                                 sess->auth.digest_length) != 0) {
 676                         op->status = RTE_CRYPTO_OP_STATUS_AUTH_FAILED;
 677                 }
 678                 /* Trim area used for digest from mbuf. */
 679                 rte_pktmbuf_trim(m_asrc,
 680                                 sess->auth.digest_length);
 681         }
 682 }
 683
 684 /** Process crypto operation for mbuf */
 685 static inline int
 686 process_op(const struct armv8_crypto_qp *qp, struct rte_crypto_op *op,
 687                 struct armv8_crypto_session *sess)
 688 {
 689         struct rte_mbuf *msrc, *mdst;
 690
 691         msrc = op->sym->m_src;
 692         mdst = op->sym->m_dst ? op->sym->m_dst : op->sym->m_src;
 693
 694         op->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
 695
 696         switch (sess->chain_order) {
 697         case ARMV8_CRYPTO_CHAIN_CIPHER_AUTH:
 698         case ARMV8_CRYPTO_CHAIN_AUTH_CIPHER: /* Fall through */
 699                 process_armv8_chained_op(op, sess, msrc, mdst);
 700                 break;
 701         default:
 702                 op->status = RTE_CRYPTO_OP_STATUS_ERROR;
 703                 break;
 704         }
 705
 706         /* Free session if a session-less crypto op */
 707         if (op->sess_type == RTE_CRYPTO_OP_SESSIONLESS) {
 708                 memset(sess, 0, sizeof(struct armv8_crypto_session));
 709                 rte_mempool_put(qp->sess_mp, op->sym->session);
 710                 op->sym->session = NULL;
 711         }
 712
 713         if (op->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED)
 714                 op->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
 715
 716         if (unlikely(op->status == RTE_CRYPTO_OP_STATUS_ERROR))
 717                 return -1;
 718
 719         return 0;
 720 }
 721
 722 /*
 723  *------------------------------------------------------------------------------
 724  * PMD Framework
 725  *------------------------------------------------------------------------------
 726  */
 727
 728 /** Enqueue burst */
 729 static uint16_t
 730 armv8_crypto_pmd_enqueue_burst(void *queue_pair, struct rte_crypto_op **ops,
 731                 uint16_t nb_ops)
 732 {
 733         struct armv8_crypto_session *sess;
 734         struct armv8_crypto_qp *qp = queue_pair;
 735         int i, retval;
 736
 737         for (i = 0; i < nb_ops; i++) {
 738                 sess = get_session(qp, ops[i]);
 739                 if (unlikely(sess == NULL))
 740                         goto enqueue_err;
 741
 742                 retval = process_op(qp, ops[i], sess);
 743                 if (unlikely(retval < 0))
 744                         goto enqueue_err;
 745         }
 746
 747         retval = rte_ring_enqueue_burst(qp->processed_ops, (void *)ops, i,
 748                         NULL);
 749         qp->stats.enqueued_count += retval;
 750
 751         return retval;
 752
 753 enqueue_err:
 754         retval = rte_ring_enqueue_burst(qp->processed_ops, (void *)ops, i,
 755                         NULL);
 756         if (ops[i] != NULL)
 757                 ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 758
 759         qp->stats.enqueue_err_count++;
 760         return retval;
 761 }
 762
 763 /** Dequeue burst */
 764 static uint16_t
 765 armv8_crypto_pmd_dequeue_burst(void *queue_pair, struct rte_crypto_op **ops,
 766                 uint16_t nb_ops)
 767 {
 768         struct armv8_crypto_qp *qp = queue_pair;
 769
 770         unsigned int nb_dequeued = 0;
 771
 772         nb_dequeued = rte_ring_dequeue_burst(qp->processed_ops,
 773                         (void **)ops, nb_ops, NULL);
 774         qp->stats.dequeued_count += nb_dequeued;
 775
 776         return nb_dequeued;
 777 }
 778
 779 /** Create ARMv8 crypto device */
 780 static int
 781 cryptodev_armv8_crypto_create(const char *name,
 782                         struct rte_vdev_device *vdev,
 783                         struct rte_crypto_vdev_init_params *init_params)
 784 {
 785         struct rte_cryptodev *dev;
 786         struct armv8_crypto_private *internals;
 787
 788         /* Check CPU for support for AES instruction set */
 789         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AES)) {
 790                 ARMV8_CRYPTO_LOG_ERR(
 791                         "AES instructions not supported by CPU");
 792                 return -EFAULT;
 793         }
 794
 795         /* Check CPU for support for SHA instruction set */
 796         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_SHA1) ||
 797             !rte_cpu_get_flag_enabled(RTE_CPUFLAG_SHA2)) {
 798                 ARMV8_CRYPTO_LOG_ERR(
 799                         "SHA1/SHA2 instructions not supported by CPU");
 800                 return -EFAULT;
 801         }
 802
 803         /* Check CPU for support for Advance SIMD instruction set */
 804         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
 805                 ARMV8_CRYPTO_LOG_ERR(
 806                         "Advanced SIMD instructions not supported by CPU");
 807                 return -EFAULT;
 808         }
 809
 810         if (init_params->name[0] == '\0')
 811                 snprintf(init_params->name, sizeof(init_params->name),
 812                                 "%s", name);
 813
 814         dev = rte_cryptodev_vdev_pmd_init(init_params->name,
 815                                 sizeof(struct armv8_crypto_private),
 816                                 init_params->socket_id,
 817                                 vdev);
 818         if (dev == NULL) {
 819                 ARMV8_CRYPTO_LOG_ERR("failed to create cryptodev vdev");
 820                 goto init_error;
 821         }
 822
 823         dev->driver_id = cryptodev_driver_id;
 824         dev->dev_ops = rte_armv8_crypto_pmd_ops;
 825
 826         /* register rx/tx burst functions for data path */
 827         dev->dequeue_burst = armv8_crypto_pmd_dequeue_burst;
 828         dev->enqueue_burst = armv8_crypto_pmd_enqueue_burst;
 829
 830         dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
 831                         RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
 832                         RTE_CRYPTODEV_FF_CPU_NEON |
 833                         RTE_CRYPTODEV_FF_CPU_ARM_CE;
 834
 835         /* Set vector instructions mode supported */
 836         internals = dev->data->dev_private;
 837
 838         internals->max_nb_qpairs = init_params->max_nb_queue_pairs;
 839         internals->max_nb_sessions = init_params->max_nb_sessions;
 840
 841         return 0;
 842
 843 init_error:
 844         ARMV8_CRYPTO_LOG_ERR(
 845                 "driver %s: cryptodev_armv8_crypto_create failed",
 846                 init_params->name);
 847
 848         cryptodev_armv8_crypto_uninit(vdev);
 849         return -EFAULT;
 850 }
 851
 852 /** Initialise ARMv8 crypto device */
 853 static int
 854 cryptodev_armv8_crypto_init(struct rte_vdev_device *vdev)
 855 {
 856         struct rte_crypto_vdev_init_params init_params = {
 857                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_QUEUE_PAIRS,
 858                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_SESSIONS,
 859                 rte_socket_id(),
 860                 {0}
 861         };
 862         const char *name;
 863         const char *input_args;
 864
 865         name = rte_vdev_device_name(vdev);
 866         if (name == NULL)
 867                 return -EINVAL;
 868         input_args = rte_vdev_device_args(vdev);
 869         rte_cryptodev_vdev_parse_init_params(&init_params, input_args);
 870
 871         RTE_LOG(INFO, PMD, "Initialising %s on NUMA node %d\n", name,
 872                         init_params.socket_id);
 873         if (init_params.name[0] != '\0') {
 874                 RTE_LOG(INFO, PMD, "  User defined name = %s\n",
 875                         init_params.name);
 876         }
 877         RTE_LOG(INFO, PMD, "  Max number of queue pairs = %d\n",
 878                         init_params.max_nb_queue_pairs);
 879         RTE_LOG(INFO, PMD, "  Max number of sessions = %d\n",
 880                         init_params.max_nb_sessions);
 881
 882         return cryptodev_armv8_crypto_create(name, vdev, &init_params);
 883 }
 884
 885 /** Uninitialise ARMv8 crypto device */
 886 static int
 887 cryptodev_armv8_crypto_uninit(struct rte_vdev_device *vdev)
 888 {
 889         const char *name;
 890
 891         name = rte_vdev_device_name(vdev);
 892         if (name == NULL)
 893                 return -EINVAL;
 894
 895         RTE_LOG(INFO, PMD,
 896                 "Closing ARMv8 crypto device %s on numa socket %u\n",
 897                 name, rte_socket_id());
 898
 899         return 0;
 900 }
 901
 902 static struct rte_vdev_driver armv8_crypto_drv = {
 903         .probe = cryptodev_armv8_crypto_init,
 904         .remove = cryptodev_armv8_crypto_uninit
 905 };
 906
 907 RTE_PMD_REGISTER_VDEV(CRYPTODEV_NAME_ARMV8_PMD, armv8_crypto_drv);
 908 RTE_PMD_REGISTER_ALIAS(CRYPTODEV_NAME_ARMV8_PMD, cryptodev_armv8_pmd);
 909 RTE_PMD_REGISTER_PARAM_STRING(CRYPTODEV_NAME_ARMV8_PMD,
 910         "max_nb_queue_pairs=<int> "
 911         "max_nb_sessions=<int> "
 912         "socket_id=<int>");
 913 RTE_PMD_REGISTER_CRYPTO_DRIVER(armv8_crypto_drv, cryptodev_driver_id);