drivers/crypto/aesni_mb/rte_aesni_mb_pmd.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2015-2016 Intel Corporation. All rights reserved.
   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 Intel Corporation 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 <rte_common.h>
  34 #include <rte_hexdump.h>
  35 #include <rte_cryptodev.h>
  36 #include <rte_cryptodev_pmd.h>
  37 #include <rte_dev.h>
  38 #include <rte_malloc.h>
  39 #include <rte_cpuflags.h>
  40
  41 #include "rte_aesni_mb_pmd_private.h"
  42
  43 /**
  44  * Global static parameter used to create a unique name for each AES-NI multi
  45  * buffer crypto device.
  46  */
  47 static unsigned unique_name_id;
  48
  49 static inline int
  50 create_unique_device_name(char *name, size_t size)
  51 {
  52         int ret;
  53
  54         if (name == NULL)
  55                 return -EINVAL;
  56
  57         ret = snprintf(name, size, "%s_%u", RTE_STR(CRYPTODEV_NAME_AESNI_MB_PMD),
  58                         unique_name_id++);
  59         if (ret < 0)
  60                 return ret;
  61         return 0;
  62 }
  63
  64 typedef void (*hash_one_block_t)(void *data, void *digest);
  65 typedef void (*aes_keyexp_t)(void *key, void *enc_exp_keys, void *dec_exp_keys);
  66
  67 /**
  68  * Calculate the authentication pre-computes
  69  *
  70  * @param one_block_hash        Function pointer to calculate digest on ipad/opad
  71  * @param ipad                  Inner pad output byte array
  72  * @param opad                  Outer pad output byte array
  73  * @param hkey                  Authentication key
  74  * @param hkey_len              Authentication key length
  75  * @param blocksize             Block size of selected hash algo
  76  */
  77 static void
  78 calculate_auth_precomputes(hash_one_block_t one_block_hash,
  79                 uint8_t *ipad, uint8_t *opad,
  80                 uint8_t *hkey, uint16_t hkey_len,
  81                 uint16_t blocksize)
  82 {
  83         unsigned i, length;
  84
  85         uint8_t ipad_buf[blocksize] __rte_aligned(16);
  86         uint8_t opad_buf[blocksize] __rte_aligned(16);
  87
  88         /* Setup inner and outer pads */
  89         memset(ipad_buf, HMAC_IPAD_VALUE, blocksize);
  90         memset(opad_buf, HMAC_OPAD_VALUE, blocksize);
  91
  92         /* XOR hash key with inner and outer pads */
  93         length = hkey_len > blocksize ? blocksize : hkey_len;
  94
  95         for (i = 0; i < length; i++) {
  96                 ipad_buf[i] ^= hkey[i];
  97                 opad_buf[i] ^= hkey[i];
  98         }
  99
 100         /* Compute partial hashes */
 101         (*one_block_hash)(ipad_buf, ipad);
 102         (*one_block_hash)(opad_buf, opad);
 103
 104         /* Clean up stack */
 105         memset(ipad_buf, 0, blocksize);
 106         memset(opad_buf, 0, blocksize);
 107 }
 108
 109 /** Get xform chain order */
 110 static int
 111 aesni_mb_get_chain_order(const struct rte_crypto_sym_xform *xform)
 112 {
 113         /*
 114          * Multi-buffer only supports HASH_CIPHER or CIPHER_HASH chained
 115          * operations, all other options are invalid, so we must have exactly
 116          * 2 xform structs chained together
 117          */
 118         if (xform->next == NULL || xform->next->next != NULL)
 119                 return -1;
 120
 121         if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH &&
 122                         xform->next->type == RTE_CRYPTO_SYM_XFORM_CIPHER)
 123                 return HASH_CIPHER;
 124
 125         if (xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER &&
 126                                 xform->next->type == RTE_CRYPTO_SYM_XFORM_AUTH)
 127                 return CIPHER_HASH;
 128
 129         return -1;
 130 }
 131
 132 /** Set session authentication parameters */
 133 static int
 134 aesni_mb_set_session_auth_parameters(const struct aesni_mb_ops *mb_ops,
 135                 struct aesni_mb_session *sess,
 136                 const struct rte_crypto_sym_xform *xform)
 137 {
 138         hash_one_block_t hash_oneblock_fn;
 139
 140         if (xform->type != RTE_CRYPTO_SYM_XFORM_AUTH) {
 141                 MB_LOG_ERR("Crypto xform struct not of type auth");
 142                 return -1;
 143         }
 144
 145         /* Set Authentication Parameters */
 146         if (xform->auth.algo == RTE_CRYPTO_AUTH_AES_XCBC_MAC) {
 147                 sess->auth.algo = AES_XCBC;
 148                 (*mb_ops->aux.keyexp.aes_xcbc)(xform->auth.key.data,
 149                                 sess->auth.xcbc.k1_expanded,
 150                                 sess->auth.xcbc.k2, sess->auth.xcbc.k3);
 151                 return 0;
 152         }
 153
 154         switch (xform->auth.algo) {
 155         case RTE_CRYPTO_AUTH_MD5_HMAC:
 156                 sess->auth.algo = MD5;
 157                 hash_oneblock_fn = mb_ops->aux.one_block.md5;
 158                 break;
 159         case RTE_CRYPTO_AUTH_SHA1_HMAC:
 160                 sess->auth.algo = SHA1;
 161                 hash_oneblock_fn = mb_ops->aux.one_block.sha1;
 162                 break;
 163         case RTE_CRYPTO_AUTH_SHA224_HMAC:
 164                 sess->auth.algo = SHA_224;
 165                 hash_oneblock_fn = mb_ops->aux.one_block.sha224;
 166                 break;
 167         case RTE_CRYPTO_AUTH_SHA256_HMAC:
 168                 sess->auth.algo = SHA_256;
 169                 hash_oneblock_fn = mb_ops->aux.one_block.sha256;
 170                 break;
 171         case RTE_CRYPTO_AUTH_SHA384_HMAC:
 172                 sess->auth.algo = SHA_384;
 173                 hash_oneblock_fn = mb_ops->aux.one_block.sha384;
 174                 break;
 175         case RTE_CRYPTO_AUTH_SHA512_HMAC:
 176                 sess->auth.algo = SHA_512;
 177                 hash_oneblock_fn = mb_ops->aux.one_block.sha512;
 178                 break;
 179         default:
 180                 MB_LOG_ERR("Unsupported authentication algorithm selection");
 181                 return -1;
 182         }
 183
 184         /* Calculate Authentication precomputes */
 185         calculate_auth_precomputes(hash_oneblock_fn,
 186                         sess->auth.pads.inner, sess->auth.pads.outer,
 187                         xform->auth.key.data,
 188                         xform->auth.key.length,
 189                         get_auth_algo_blocksize(sess->auth.algo));
 190
 191         return 0;
 192 }
 193
 194 /** Set session cipher parameters */
 195 static int
 196 aesni_mb_set_session_cipher_parameters(const struct aesni_mb_ops *mb_ops,
 197                 struct aesni_mb_session *sess,
 198                 const struct rte_crypto_sym_xform *xform)
 199 {
 200         aes_keyexp_t aes_keyexp_fn;
 201
 202         if (xform->type != RTE_CRYPTO_SYM_XFORM_CIPHER) {
 203                 MB_LOG_ERR("Crypto xform struct not of type cipher");
 204                 return -1;
 205         }
 206
 207         /* Select cipher direction */
 208         switch (xform->cipher.op) {
 209         case RTE_CRYPTO_CIPHER_OP_ENCRYPT:
 210                 sess->cipher.direction = ENCRYPT;
 211                 break;
 212         case RTE_CRYPTO_CIPHER_OP_DECRYPT:
 213                 sess->cipher.direction = DECRYPT;
 214                 break;
 215         default:
 216                 MB_LOG_ERR("Unsupported cipher operation parameter");
 217                 return -1;
 218         }
 219
 220         /* Select cipher mode */
 221         switch (xform->cipher.algo) {
 222         case RTE_CRYPTO_CIPHER_AES_CBC:
 223                 sess->cipher.mode = CBC;
 224                 break;
 225         case RTE_CRYPTO_CIPHER_AES_CTR:
 226                 sess->cipher.mode = CNTR;
 227                 break;
 228         default:
 229                 MB_LOG_ERR("Unsupported cipher mode parameter");
 230                 return -1;
 231         }
 232
 233         /* Check key length and choose key expansion function */
 234         switch (xform->cipher.key.length) {
 235         case AES_128_BYTES:
 236                 sess->cipher.key_length_in_bytes = AES_128_BYTES;
 237                 aes_keyexp_fn = mb_ops->aux.keyexp.aes128;
 238                 break;
 239         case AES_192_BYTES:
 240                 sess->cipher.key_length_in_bytes = AES_192_BYTES;
 241                 aes_keyexp_fn = mb_ops->aux.keyexp.aes192;
 242                 break;
 243         case AES_256_BYTES:
 244                 sess->cipher.key_length_in_bytes = AES_256_BYTES;
 245                 aes_keyexp_fn = mb_ops->aux.keyexp.aes256;
 246                 break;
 247         default:
 248                 MB_LOG_ERR("Unsupported cipher key length");
 249                 return -1;
 250         }
 251
 252         /* Expanded cipher keys */
 253         (*aes_keyexp_fn)(xform->cipher.key.data,
 254                         sess->cipher.expanded_aes_keys.encode,
 255                         sess->cipher.expanded_aes_keys.decode);
 256
 257         return 0;
 258 }
 259
 260 /** Parse crypto xform chain and set private session parameters */
 261 int
 262 aesni_mb_set_session_parameters(const struct aesni_mb_ops *mb_ops,
 263                 struct aesni_mb_session *sess,
 264                 const struct rte_crypto_sym_xform *xform)
 265 {
 266         const struct rte_crypto_sym_xform *auth_xform = NULL;
 267         const struct rte_crypto_sym_xform *cipher_xform = NULL;
 268
 269         /* Select Crypto operation - hash then cipher / cipher then hash */
 270         switch (aesni_mb_get_chain_order(xform)) {
 271         case HASH_CIPHER:
 272                 sess->chain_order = HASH_CIPHER;
 273                 auth_xform = xform;
 274                 cipher_xform = xform->next;
 275                 break;
 276         case CIPHER_HASH:
 277                 sess->chain_order = CIPHER_HASH;
 278                 auth_xform = xform->next;
 279                 cipher_xform = xform;
 280                 break;
 281         default:
 282                 MB_LOG_ERR("Unsupported operation chain order parameter");
 283                 return -1;
 284         }
 285
 286         if (aesni_mb_set_session_auth_parameters(mb_ops, sess, auth_xform)) {
 287                 MB_LOG_ERR("Invalid/unsupported authentication parameters");
 288                 return -1;
 289         }
 290
 291         if (aesni_mb_set_session_cipher_parameters(mb_ops, sess,
 292                         cipher_xform)) {
 293                 MB_LOG_ERR("Invalid/unsupported cipher parameters");
 294                 return -1;
 295         }
 296         return 0;
 297 }
 298
 299 /** Get multi buffer session */
 300 static struct aesni_mb_session *
 301 get_session(struct aesni_mb_qp *qp, struct rte_crypto_op *op)
 302 {
 303         struct aesni_mb_session *sess = NULL;
 304
 305         if (op->sym->sess_type == RTE_CRYPTO_SYM_OP_WITH_SESSION) {
 306                 if (unlikely(op->sym->session->dev_type !=
 307                                 RTE_CRYPTODEV_AESNI_MB_PMD))
 308                         return NULL;
 309
 310                 sess = (struct aesni_mb_session *)op->sym->session->_private;
 311         } else  {
 312                 void *_sess = NULL;
 313
 314                 if (rte_mempool_get(qp->sess_mp, (void **)&_sess))
 315                         return NULL;
 316
 317                 sess = (struct aesni_mb_session *)
 318                         ((struct rte_cryptodev_sym_session *)_sess)->_private;
 319
 320                 if (unlikely(aesni_mb_set_session_parameters(qp->ops,
 321                                 sess, op->sym->xform) != 0)) {
 322                         rte_mempool_put(qp->sess_mp, _sess);
 323                         sess = NULL;
 324                 }
 325         }
 326
 327         return sess;
 328 }
 329
 330 /**
 331  * Process a crypto operation and complete a JOB_AES_HMAC job structure for
 332  * submission to the multi buffer library for processing.
 333  *
 334  * @param       qp      queue pair
 335  * @param       job     JOB_AES_HMAC structure to fill
 336  * @param       m       mbuf to process
 337  *
 338  * @return
 339  * - Completed JOB_AES_HMAC structure pointer on success
 340  * - NULL pointer if completion of JOB_AES_HMAC structure isn't possible
 341  */
 342 static JOB_AES_HMAC *
 343 process_crypto_op(struct aesni_mb_qp *qp, struct rte_crypto_op *op,
 344                 struct aesni_mb_session *session)
 345 {
 346         JOB_AES_HMAC *job;
 347
 348         struct rte_mbuf *m_src = op->sym->m_src, *m_dst;
 349         uint16_t m_offset = 0;
 350
 351         job = (*qp->ops->job.get_next)(&qp->mb_mgr);
 352         if (unlikely(job == NULL))
 353                 return job;
 354
 355         /* Set crypto operation */
 356         job->chain_order = session->chain_order;
 357
 358         /* Set cipher parameters */
 359         job->cipher_direction = session->cipher.direction;
 360         job->cipher_mode = session->cipher.mode;
 361
 362         job->aes_key_len_in_bytes = session->cipher.key_length_in_bytes;
 363         job->aes_enc_key_expanded = session->cipher.expanded_aes_keys.encode;
 364         job->aes_dec_key_expanded = session->cipher.expanded_aes_keys.decode;
 365
 366
 367         /* Set authentication parameters */
 368         job->hash_alg = session->auth.algo;
 369         if (job->hash_alg == AES_XCBC) {
 370                 job->_k1_expanded = session->auth.xcbc.k1_expanded;
 371                 job->_k2 = session->auth.xcbc.k2;
 372                 job->_k3 = session->auth.xcbc.k3;
 373         } else {
 374                 job->hashed_auth_key_xor_ipad = session->auth.pads.inner;
 375                 job->hashed_auth_key_xor_opad = session->auth.pads.outer;
 376         }
 377
 378         /* Mutable crypto operation parameters */
 379         if (op->sym->m_dst) {
 380                 m_src = m_dst = op->sym->m_dst;
 381
 382                 /* append space for output data to mbuf */
 383                 char *odata = rte_pktmbuf_append(m_dst,
 384                                 rte_pktmbuf_data_len(op->sym->m_src));
 385                 if (odata == NULL) {
 386                         MB_LOG_ERR("failed to allocate space in destination "
 387                                         "mbuf for source data");
 388                         return NULL;
 389                 }
 390
 391                 memcpy(odata, rte_pktmbuf_mtod(op->sym->m_src, void*),
 392                                 rte_pktmbuf_data_len(op->sym->m_src));
 393         } else {
 394                 m_dst = m_src;
 395                 m_offset = op->sym->cipher.data.offset;
 396         }
 397
 398         /* Set digest output location */
 399         if (job->cipher_direction == DECRYPT) {
 400                 job->auth_tag_output = (uint8_t *)rte_pktmbuf_append(m_dst,
 401                                 get_digest_byte_length(job->hash_alg));
 402
 403                 if (job->auth_tag_output == NULL) {
 404                         MB_LOG_ERR("failed to allocate space in output mbuf "
 405                                         "for temp digest");
 406                         return NULL;
 407                 }
 408
 409                 memset(job->auth_tag_output, 0,
 410                                 sizeof(get_digest_byte_length(job->hash_alg)));
 411
 412         } else {
 413                 job->auth_tag_output = op->sym->auth.digest.data;
 414         }
 415
 416         /*
 417          * Multi-buffer library current only support returning a truncated
 418          * digest length as specified in the relevant IPsec RFCs
 419          */
 420         job->auth_tag_output_len_in_bytes =
 421                         get_truncated_digest_byte_length(job->hash_alg);
 422
 423         /* Set IV parameters */
 424         job->iv = op->sym->cipher.iv.data;
 425         job->iv_len_in_bytes = op->sym->cipher.iv.length;
 426
 427         /* Data  Parameter */
 428         job->src = rte_pktmbuf_mtod(m_src, uint8_t *);
 429         job->dst = rte_pktmbuf_mtod_offset(m_dst, uint8_t *, m_offset);
 430
 431         job->cipher_start_src_offset_in_bytes = op->sym->cipher.data.offset;
 432         job->msg_len_to_cipher_in_bytes = op->sym->cipher.data.length;
 433
 434         job->hash_start_src_offset_in_bytes = op->sym->auth.data.offset;
 435         job->msg_len_to_hash_in_bytes = op->sym->auth.data.length;
 436
 437         /* Set user data to be crypto operation data struct */
 438         job->user_data = op;
 439         job->user_data2 = m_dst;
 440
 441         return job;
 442 }
 443
 444 /**
 445  * Process a completed job and return rte_mbuf which job processed
 446  *
 447  * @param job   JOB_AES_HMAC job to process
 448  *
 449  * @return
 450  * - Returns processed mbuf which is trimmed of output digest used in
 451  * verification of supplied digest in the case of a HASH_CIPHER operation
 452  * - Returns NULL on invalid job
 453  */
 454 static struct rte_crypto_op *
 455 post_process_mb_job(struct aesni_mb_qp *qp, JOB_AES_HMAC *job)
 456 {
 457         struct rte_crypto_op *op =
 458                         (struct rte_crypto_op *)job->user_data;
 459         struct rte_mbuf *m_dst =
 460                         (struct rte_mbuf *)job->user_data2;
 461
 462         if (op == NULL || m_dst == NULL)
 463                 return NULL;
 464
 465         /* set status as successful by default */
 466         op->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
 467
 468         /* check if job has been processed  */
 469         if (unlikely(job->status != STS_COMPLETED)) {
 470                 op->status = RTE_CRYPTO_OP_STATUS_ERROR;
 471                 return op;
 472         } else if (job->chain_order == HASH_CIPHER) {
 473                 /* Verify digest if required */
 474                 if (memcmp(job->auth_tag_output, op->sym->auth.digest.data,
 475                                 job->auth_tag_output_len_in_bytes) != 0)
 476                         op->status = RTE_CRYPTO_OP_STATUS_AUTH_FAILED;
 477
 478                 /* trim area used for digest from mbuf */
 479                 rte_pktmbuf_trim(m_dst, get_digest_byte_length(job->hash_alg));
 480         }
 481
 482         /* Free session if a session-less crypto op */
 483         if (op->sym->sess_type == RTE_CRYPTO_SYM_OP_SESSIONLESS) {
 484                 rte_mempool_put(qp->sess_mp, op->sym->session);
 485                 op->sym->session = NULL;
 486         }
 487
 488         return op;
 489 }
 490
 491 /**
 492  * Process a completed JOB_AES_HMAC job and keep processing jobs until
 493  * get_completed_job return NULL
 494  *
 495  * @param qp            Queue Pair to process
 496  * @param job           JOB_AES_HMAC job
 497  *
 498  * @return
 499  * - Number of processed jobs
 500  */
 501 static unsigned
 502 handle_completed_jobs(struct aesni_mb_qp *qp, JOB_AES_HMAC *job)
 503 {
 504         struct rte_crypto_op *op = NULL;
 505         unsigned processed_jobs = 0;
 506
 507         while (job) {
 508                 processed_jobs++;
 509                 op = post_process_mb_job(qp, job);
 510                 if (op)
 511                         rte_ring_enqueue(qp->processed_ops, (void *)op);
 512                 else
 513                         qp->stats.dequeue_err_count++;
 514                 job = (*qp->ops->job.get_completed_job)(&qp->mb_mgr);
 515         }
 516
 517         return processed_jobs;
 518 }
 519
 520 static uint16_t
 521 aesni_mb_pmd_enqueue_burst(void *queue_pair, struct rte_crypto_op **ops,
 522                 uint16_t nb_ops)
 523 {
 524         struct aesni_mb_session *sess;
 525         struct aesni_mb_qp *qp = queue_pair;
 526
 527         JOB_AES_HMAC *job = NULL;
 528
 529         int i, processed_jobs = 0;
 530
 531         for (i = 0; i < nb_ops; i++) {
 532 #ifdef RTE_LIBRTE_AESNI_MB_DEBUG
 533                 if (unlikely(op->type != RTE_CRYPTO_OP_TYPE_SYMMETRIC)) {
 534                         MB_LOG_ERR("PMD only supports symmetric crypto "
 535                                 "operation requests, op (%p) is not a "
 536                                 "symmetric operation.", op);
 537                         qp->stats.enqueue_err_count++;
 538                         goto flush_jobs;
 539                 }
 540 #endif
 541                 sess = get_session(qp, ops[i]);
 542                 if (unlikely(sess == NULL)) {
 543                         qp->stats.enqueue_err_count++;
 544                         goto flush_jobs;
 545                 }
 546
 547                 job = process_crypto_op(qp, ops[i], sess);
 548                 if (unlikely(job == NULL)) {
 549                         qp->stats.enqueue_err_count++;
 550                         goto flush_jobs;
 551                 }
 552
 553                 /* Submit Job */
 554                 job = (*qp->ops->job.submit)(&qp->mb_mgr);
 555
 556                 /*
 557                  * If submit returns a processed job then handle it,
 558                  * before submitting subsequent jobs
 559                  */
 560                 if (job)
 561                         processed_jobs += handle_completed_jobs(qp, job);
 562         }
 563
 564         if (processed_jobs == 0)
 565                 goto flush_jobs;
 566         else
 567                 qp->stats.enqueued_count += processed_jobs;
 568         return i;
 569
 570 flush_jobs:
 571         /*
 572          * If we haven't processed any jobs in submit loop, then flush jobs
 573          * queue to stop the output stalling
 574          */
 575         job = (*qp->ops->job.flush_job)(&qp->mb_mgr);
 576         if (job)
 577                 qp->stats.enqueued_count += handle_completed_jobs(qp, job);
 578
 579         return i;
 580 }
 581
 582 static uint16_t
 583 aesni_mb_pmd_dequeue_burst(void *queue_pair, struct rte_crypto_op **ops,
 584                 uint16_t nb_ops)
 585 {
 586         struct aesni_mb_qp *qp = queue_pair;
 587
 588         unsigned nb_dequeued;
 589
 590         nb_dequeued = rte_ring_dequeue_burst(qp->processed_ops,
 591                         (void **)ops, nb_ops);
 592         qp->stats.dequeued_count += nb_dequeued;
 593
 594         return nb_dequeued;
 595 }
 596
 597
 598 static int cryptodev_aesni_mb_uninit(const char *name);
 599
 600 static int
 601 cryptodev_aesni_mb_create(const char *name,
 602                 struct rte_crypto_vdev_init_params *init_params)
 603 {
 604         struct rte_cryptodev *dev;
 605         char crypto_dev_name[RTE_CRYPTODEV_NAME_MAX_LEN];
 606         struct aesni_mb_private *internals;
 607         enum aesni_mb_vector_mode vector_mode;
 608
 609         /* Check CPU for support for AES instruction set */
 610         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AES)) {
 611                 MB_LOG_ERR("AES instructions not supported by CPU");
 612                 return -EFAULT;
 613         }
 614
 615         /* Check CPU for supported vector instruction set */
 616         if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2))
 617                 vector_mode = RTE_AESNI_MB_AVX2;
 618         else if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX))
 619                 vector_mode = RTE_AESNI_MB_AVX;
 620         else if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_SSE4_1))
 621                 vector_mode = RTE_AESNI_MB_SSE;
 622         else {
 623                 MB_LOG_ERR("Vector instructions are not supported by CPU");
 624                 return -EFAULT;
 625         }
 626
 627         /* create a unique device name */
 628         if (create_unique_device_name(crypto_dev_name,
 629                         RTE_CRYPTODEV_NAME_MAX_LEN) != 0) {
 630                 MB_LOG_ERR("failed to create unique cryptodev name");
 631                 return -EINVAL;
 632         }
 633
 634
 635         dev = rte_cryptodev_pmd_virtual_dev_init(crypto_dev_name,
 636                         sizeof(struct aesni_mb_private), init_params->socket_id);
 637         if (dev == NULL) {
 638                 MB_LOG_ERR("failed to create cryptodev vdev");
 639                 goto init_error;
 640         }
 641
 642         dev->dev_type = RTE_CRYPTODEV_AESNI_MB_PMD;
 643         dev->dev_ops = rte_aesni_mb_pmd_ops;
 644
 645         /* register rx/tx burst functions for data path */
 646         dev->dequeue_burst = aesni_mb_pmd_dequeue_burst;
 647         dev->enqueue_burst = aesni_mb_pmd_enqueue_burst;
 648
 649         dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
 650                         RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
 651                         RTE_CRYPTODEV_FF_CPU_AESNI;
 652
 653         switch (vector_mode) {
 654         case RTE_AESNI_MB_SSE:
 655                 dev->feature_flags |= RTE_CRYPTODEV_FF_CPU_SSE;
 656                 break;
 657         case RTE_AESNI_MB_AVX:
 658                 dev->feature_flags |= RTE_CRYPTODEV_FF_CPU_AVX;
 659                 break;
 660         case RTE_AESNI_MB_AVX2:
 661                 dev->feature_flags |= RTE_CRYPTODEV_FF_CPU_AVX2;
 662                 break;
 663         default:
 664                 break;
 665         }
 666
 667         /* Set vector instructions mode supported */
 668         internals = dev->data->dev_private;
 669
 670         internals->vector_mode = vector_mode;
 671         internals->max_nb_queue_pairs = init_params->max_nb_queue_pairs;
 672         internals->max_nb_sessions = init_params->max_nb_sessions;
 673
 674         return 0;
 675 init_error:
 676         MB_LOG_ERR("driver %s: cryptodev_aesni_create failed", name);
 677
 678         cryptodev_aesni_mb_uninit(crypto_dev_name);
 679         return -EFAULT;
 680 }
 681
 682
 683 static int
 684 cryptodev_aesni_mb_init(const char *name,
 685                 const char *input_args)
 686 {
 687         struct rte_crypto_vdev_init_params init_params = {
 688                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_QUEUE_PAIRS,
 689                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_SESSIONS,
 690                 rte_socket_id()
 691         };
 692
 693         rte_cryptodev_parse_vdev_init_params(&init_params, input_args);
 694
 695         RTE_LOG(INFO, PMD, "Initialising %s on NUMA node %d\n", name,
 696                         init_params.socket_id);
 697         RTE_LOG(INFO, PMD, "  Max number of queue pairs = %d\n",
 698                         init_params.max_nb_queue_pairs);
 699         RTE_LOG(INFO, PMD, "  Max number of sessions = %d\n",
 700                         init_params.max_nb_sessions);
 701
 702         return cryptodev_aesni_mb_create(name, &init_params);
 703 }
 704
 705 static int
 706 cryptodev_aesni_mb_uninit(const char *name)
 707 {
 708         if (name == NULL)
 709                 return -EINVAL;
 710
 711         RTE_LOG(INFO, PMD, "Closing AESNI crypto device %s on numa socket %u\n",
 712                         name, rte_socket_id());
 713
 714         return 0;
 715 }
 716
 717 static struct rte_driver cryptodev_aesni_mb_pmd_drv = {
 718         .type = PMD_VDEV,
 719         .init = cryptodev_aesni_mb_init,
 720         .uninit = cryptodev_aesni_mb_uninit
 721 };
 722
 723 PMD_REGISTER_DRIVER(cryptodev_aesni_mb_pmd_drv, CRYPTODEV_NAME_AESNI_MB_PMD);
 724 DRIVER_REGISTER_PARAM_STRING(CRYPTODEV_NAME_AESNI_MB_PMD,
 725         "max_nb_queue_pairs=<int> "
 726         "max_nb_sessions=<int> "
 727         "socket_id=<int>");