drivers/crypto/snow3g/rte_snow3g_pmd.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 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_config.h>
  35 #include <rte_hexdump.h>
  36 #include <rte_cryptodev.h>
  37 #include <rte_cryptodev_pmd.h>
  38 #include <rte_vdev.h>
  39 #include <rte_malloc.h>
  40 #include <rte_cpuflags.h>
  41
  42 #include "rte_snow3g_pmd_private.h"
  43
  44 #define SNOW3G_IV_LENGTH 16
  45 #define SNOW3G_DIGEST_LENGTH 4
  46 #define SNOW3G_MAX_BURST 8
  47 #define BYTE_LEN 8
  48
  49 /**
  50  * Global static parameter used to create a unique name for each SNOW 3G
  51  * crypto device.
  52  */
  53 static unsigned unique_name_id;
  54
  55 static inline int
  56 create_unique_device_name(char *name, size_t size)
  57 {
  58         int ret;
  59
  60         if (name == NULL)
  61                 return -EINVAL;
  62
  63         ret = snprintf(name, size, "%s_%u", RTE_STR(CRYPTODEV_NAME_SNOW3G_PMD),
  64                         unique_name_id++);
  65         if (ret < 0)
  66                 return ret;
  67         return 0;
  68 }
  69
  70 /** Get xform chain order. */
  71 static enum snow3g_operation
  72 snow3g_get_mode(const struct rte_crypto_sym_xform *xform)
  73 {
  74         if (xform == NULL)
  75                 return SNOW3G_OP_NOT_SUPPORTED;
  76
  77         if (xform->next)
  78                 if (xform->next->next != NULL)
  79                         return SNOW3G_OP_NOT_SUPPORTED;
  80
  81         if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH) {
  82                 if (xform->next == NULL)
  83                         return SNOW3G_OP_ONLY_AUTH;
  84                 else if (xform->next->type == RTE_CRYPTO_SYM_XFORM_CIPHER)
  85                         return SNOW3G_OP_AUTH_CIPHER;
  86                 else
  87                         return SNOW3G_OP_NOT_SUPPORTED;
  88         }
  89
  90         if (xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER) {
  91                 if (xform->next == NULL)
  92                         return SNOW3G_OP_ONLY_CIPHER;
  93                 else if (xform->next->type == RTE_CRYPTO_SYM_XFORM_AUTH)
  94                         return SNOW3G_OP_CIPHER_AUTH;
  95                 else
  96                         return SNOW3G_OP_NOT_SUPPORTED;
  97         }
  98
  99         return SNOW3G_OP_NOT_SUPPORTED;
 100 }
 101
 102
 103 /** Parse crypto xform chain and set private session parameters. */
 104 int
 105 snow3g_set_session_parameters(struct snow3g_session *sess,
 106                 const struct rte_crypto_sym_xform *xform)
 107 {
 108         const struct rte_crypto_sym_xform *auth_xform = NULL;
 109         const struct rte_crypto_sym_xform *cipher_xform = NULL;
 110         enum snow3g_operation mode;
 111
 112         /* Select Crypto operation - hash then cipher / cipher then hash */
 113         mode = snow3g_get_mode(xform);
 114
 115         switch (mode) {
 116         case SNOW3G_OP_CIPHER_AUTH:
 117                 auth_xform = xform->next;
 118
 119                 /* Fall-through */
 120         case SNOW3G_OP_ONLY_CIPHER:
 121                 cipher_xform = xform;
 122                 break;
 123         case SNOW3G_OP_AUTH_CIPHER:
 124                 cipher_xform = xform->next;
 125                 /* Fall-through */
 126         case SNOW3G_OP_ONLY_AUTH:
 127                 auth_xform = xform;
 128                 break;
 129         case SNOW3G_OP_NOT_SUPPORTED:
 130         default:
 131                 SNOW3G_LOG_ERR("Unsupported operation chain order parameter");
 132                 return -EINVAL;
 133         }
 134
 135         if (cipher_xform) {
 136                 /* Only SNOW 3G UEA2 supported */
 137                 if (cipher_xform->cipher.algo != RTE_CRYPTO_CIPHER_SNOW3G_UEA2)
 138                         return -EINVAL;
 139                 /* Initialize key */
 140                 sso_snow3g_init_key_sched(xform->cipher.key.data,
 141                                 &sess->pKeySched_cipher);
 142         }
 143
 144         if (auth_xform) {
 145                 /* Only SNOW 3G UIA2 supported */
 146                 if (auth_xform->auth.algo != RTE_CRYPTO_AUTH_SNOW3G_UIA2)
 147                         return -EINVAL;
 148                 sess->auth_op = auth_xform->auth.op;
 149                 /* Initialize key */
 150                 sso_snow3g_init_key_sched(xform->auth.key.data,
 151                                 &sess->pKeySched_hash);
 152         }
 153
 154
 155         sess->op = mode;
 156
 157         return 0;
 158 }
 159
 160 /** Get SNOW 3G session. */
 161 static struct snow3g_session *
 162 snow3g_get_session(struct snow3g_qp *qp, struct rte_crypto_op *op)
 163 {
 164         struct snow3g_session *sess;
 165
 166         if (op->sym->sess_type == RTE_CRYPTO_SYM_OP_WITH_SESSION) {
 167                 if (unlikely(op->sym->session->dev_type !=
 168                                 RTE_CRYPTODEV_SNOW3G_PMD))
 169                         return NULL;
 170
 171                 sess = (struct snow3g_session *)op->sym->session->_private;
 172         } else  {
 173                 struct rte_cryptodev_session *c_sess = NULL;
 174
 175                 if (rte_mempool_get(qp->sess_mp, (void **)&c_sess))
 176                         return NULL;
 177
 178                 sess = (struct snow3g_session *)c_sess->_private;
 179
 180                 if (unlikely(snow3g_set_session_parameters(sess,
 181                                 op->sym->xform) != 0))
 182                         return NULL;
 183         }
 184
 185         return sess;
 186 }
 187
 188 /** Encrypt/decrypt mbufs with same cipher key. */
 189 static uint8_t
 190 process_snow3g_cipher_op(struct rte_crypto_op **ops,
 191                 struct snow3g_session *session,
 192                 uint8_t num_ops)
 193 {
 194         unsigned i;
 195         uint8_t processed_ops = 0;
 196         uint8_t *src[SNOW3G_MAX_BURST], *dst[SNOW3G_MAX_BURST];
 197         uint8_t *IV[SNOW3G_MAX_BURST];
 198         uint32_t num_bytes[SNOW3G_MAX_BURST];
 199
 200         for (i = 0; i < num_ops; i++) {
 201                 /* Sanity checks. */
 202                 if (unlikely(ops[i]->sym->cipher.iv.length != SNOW3G_IV_LENGTH)) {
 203                         ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 204                         SNOW3G_LOG_ERR("iv");
 205                         break;
 206                 }
 207
 208                 src[i] = rte_pktmbuf_mtod(ops[i]->sym->m_src, uint8_t *) +
 209                                 (ops[i]->sym->cipher.data.offset >> 3);
 210                 dst[i] = ops[i]->sym->m_dst ?
 211                         rte_pktmbuf_mtod(ops[i]->sym->m_dst, uint8_t *) +
 212                                 (ops[i]->sym->cipher.data.offset >> 3) :
 213                         rte_pktmbuf_mtod(ops[i]->sym->m_src, uint8_t *) +
 214                                 (ops[i]->sym->cipher.data.offset >> 3);
 215                 IV[i] = ops[i]->sym->cipher.iv.data;
 216                 num_bytes[i] = ops[i]->sym->cipher.data.length >> 3;
 217
 218                 processed_ops++;
 219         }
 220
 221         sso_snow3g_f8_n_buffer(&session->pKeySched_cipher, IV, src, dst,
 222                         num_bytes, processed_ops);
 223
 224         return processed_ops;
 225 }
 226
 227 /** Encrypt/decrypt mbuf (bit level function). */
 228 static uint8_t
 229 process_snow3g_cipher_op_bit(struct rte_crypto_op *op,
 230                 struct snow3g_session *session)
 231 {
 232         uint8_t *src, *dst;
 233         uint8_t *IV;
 234         uint32_t length_in_bits, offset_in_bits;
 235
 236         /* Sanity checks. */
 237         if (unlikely(op->sym->cipher.iv.length != SNOW3G_IV_LENGTH)) {
 238                 op->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 239                 SNOW3G_LOG_ERR("iv");
 240                 return 0;
 241         }
 242
 243         offset_in_bits = op->sym->cipher.data.offset;
 244         src = rte_pktmbuf_mtod(op->sym->m_src, uint8_t *);
 245         if (op->sym->m_dst == NULL) {
 246                 op->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 247                 SNOW3G_LOG_ERR("bit-level in-place not supported\n");
 248                 return 0;
 249         }
 250         dst = rte_pktmbuf_mtod(op->sym->m_dst, uint8_t *);
 251         IV = op->sym->cipher.iv.data;
 252         length_in_bits = op->sym->cipher.data.length;
 253
 254         sso_snow3g_f8_1_buffer_bit(&session->pKeySched_cipher, IV,
 255                         src, dst, length_in_bits, offset_in_bits);
 256
 257         return 1;
 258 }
 259
 260 /** Generate/verify hash from mbufs with same hash key. */
 261 static int
 262 process_snow3g_hash_op(struct rte_crypto_op **ops,
 263                 struct snow3g_session *session,
 264                 uint8_t num_ops)
 265 {
 266         unsigned i;
 267         uint8_t processed_ops = 0;
 268         uint8_t *src, *dst;
 269         uint32_t length_in_bits;
 270
 271         for (i = 0; i < num_ops; i++) {
 272                 if (unlikely(ops[i]->sym->auth.aad.length != SNOW3G_IV_LENGTH)) {
 273                         ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 274                         SNOW3G_LOG_ERR("aad");
 275                         break;
 276                 }
 277
 278                 if (unlikely(ops[i]->sym->auth.digest.length != SNOW3G_DIGEST_LENGTH)) {
 279                         ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 280                         SNOW3G_LOG_ERR("digest");
 281                         break;
 282                 }
 283
 284                 /* Data must be byte aligned */
 285                 if ((ops[i]->sym->auth.data.offset % BYTE_LEN) != 0) {
 286                         ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 287                         SNOW3G_LOG_ERR("Offset");
 288                         break;
 289                 }
 290
 291                 length_in_bits = ops[i]->sym->auth.data.length;
 292
 293                 src = rte_pktmbuf_mtod(ops[i]->sym->m_src, uint8_t *) +
 294                                 (ops[i]->sym->auth.data.offset >> 3);
 295
 296                 if (session->auth_op == RTE_CRYPTO_AUTH_OP_VERIFY) {
 297                         dst = (uint8_t *)rte_pktmbuf_append(ops[i]->sym->m_src,
 298                                         ops[i]->sym->auth.digest.length);
 299
 300                         sso_snow3g_f9_1_buffer(&session->pKeySched_hash,
 301                                         ops[i]->sym->auth.aad.data, src,
 302                                         length_in_bits, dst);
 303                         /* Verify digest. */
 304                         if (memcmp(dst, ops[i]->sym->auth.digest.data,
 305                                         ops[i]->sym->auth.digest.length) != 0)
 306                                 ops[i]->status = RTE_CRYPTO_OP_STATUS_AUTH_FAILED;
 307
 308                         /* Trim area used for digest from mbuf. */
 309                         rte_pktmbuf_trim(ops[i]->sym->m_src,
 310                                         ops[i]->sym->auth.digest.length);
 311                 } else  {
 312                         dst = ops[i]->sym->auth.digest.data;
 313
 314                         sso_snow3g_f9_1_buffer(&session->pKeySched_hash,
 315                                         ops[i]->sym->auth.aad.data, src,
 316                                         length_in_bits, dst);
 317                 }
 318                 processed_ops++;
 319         }
 320
 321         return processed_ops;
 322 }
 323
 324 /** Process a batch of crypto ops which shares the same session. */
 325 static int
 326 process_ops(struct rte_crypto_op **ops, struct snow3g_session *session,
 327                 struct snow3g_qp *qp, uint8_t num_ops,
 328                 uint16_t *accumulated_enqueued_ops)
 329 {
 330         unsigned i;
 331         unsigned enqueued_ops, processed_ops;
 332
 333 #ifdef RTE_LIBRTE_PMD_SNOW3G_DEBUG
 334         for (i = 0; i < num_ops; i++) {
 335                 if (!rte_pktmbuf_is_contiguous(ops[i]->sym->m_src) ||
 336                                 (ops[i]->sym->m_dst != NULL &&
 337                                 !rte_pktmbuf_is_contiguous(
 338                                                 ops[i]->sym->m_dst))) {
 339                         SNOW3G_LOG_ERR("PMD supports only contiguous mbufs, "
 340                                 "op (%p) provides noncontiguous mbuf as "
 341                                 "source/destination buffer.\n", ops[i]);
 342                         ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 343                         return 0;
 344                 }
 345         }
 346 #endif
 347
 348         switch (session->op) {
 349         case SNOW3G_OP_ONLY_CIPHER:
 350                 processed_ops = process_snow3g_cipher_op(ops,
 351                                 session, num_ops);
 352                 break;
 353         case SNOW3G_OP_ONLY_AUTH:
 354                 processed_ops = process_snow3g_hash_op(ops, session,
 355                                 num_ops);
 356                 break;
 357         case SNOW3G_OP_CIPHER_AUTH:
 358                 processed_ops = process_snow3g_cipher_op(ops, session,
 359                                 num_ops);
 360                 process_snow3g_hash_op(ops, session, processed_ops);
 361                 break;
 362         case SNOW3G_OP_AUTH_CIPHER:
 363                 processed_ops = process_snow3g_hash_op(ops, session,
 364                                 num_ops);
 365                 process_snow3g_cipher_op(ops, session, processed_ops);
 366                 break;
 367         default:
 368                 /* Operation not supported. */
 369                 processed_ops = 0;
 370         }
 371
 372         for (i = 0; i < num_ops; i++) {
 373                 /*
 374                  * If there was no error/authentication failure,
 375                  * change status to successful.
 376                  */
 377                 if (ops[i]->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED)
 378                         ops[i]->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
 379                 /* Free session if a session-less crypto op. */
 380                 if (ops[i]->sym->sess_type == RTE_CRYPTO_SYM_OP_SESSIONLESS) {
 381                         rte_mempool_put(qp->sess_mp, ops[i]->sym->session);
 382                         ops[i]->sym->session = NULL;
 383                 }
 384         }
 385
 386         enqueued_ops = rte_ring_enqueue_burst(qp->processed_ops,
 387                         (void **)ops, processed_ops);
 388         qp->qp_stats.enqueued_count += enqueued_ops;
 389         *accumulated_enqueued_ops += enqueued_ops;
 390
 391         return enqueued_ops;
 392 }
 393
 394 /** Process a crypto op with length/offset in bits. */
 395 static int
 396 process_op_bit(struct rte_crypto_op *op, struct snow3g_session *session,
 397                 struct snow3g_qp *qp, uint16_t *accumulated_enqueued_ops)
 398 {
 399         unsigned enqueued_op, processed_op;
 400
 401         switch (session->op) {
 402         case SNOW3G_OP_ONLY_CIPHER:
 403                 processed_op = process_snow3g_cipher_op_bit(op,
 404                                 session);
 405                 break;
 406         case SNOW3G_OP_ONLY_AUTH:
 407                 processed_op = process_snow3g_hash_op(&op, session, 1);
 408                 break;
 409         case SNOW3G_OP_CIPHER_AUTH:
 410                 processed_op = process_snow3g_cipher_op_bit(op, session);
 411                 if (processed_op == 1)
 412                         process_snow3g_hash_op(&op, session, 1);
 413                 break;
 414         case SNOW3G_OP_AUTH_CIPHER:
 415                 processed_op = process_snow3g_hash_op(&op, session, 1);
 416                 if (processed_op == 1)
 417                         process_snow3g_cipher_op_bit(op, session);
 418                 break;
 419         default:
 420                 /* Operation not supported. */
 421                 processed_op = 0;
 422         }
 423
 424         /*
 425          * If there was no error/authentication failure,
 426          * change status to successful.
 427          */
 428         if (op->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED)
 429                 op->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
 430
 431         /* Free session if a session-less crypto op. */
 432         if (op->sym->sess_type == RTE_CRYPTO_SYM_OP_SESSIONLESS) {
 433                 rte_mempool_put(qp->sess_mp, op->sym->session);
 434                 op->sym->session = NULL;
 435         }
 436
 437         enqueued_op = rte_ring_enqueue_burst(qp->processed_ops,
 438                         (void **)&op, processed_op);
 439         qp->qp_stats.enqueued_count += enqueued_op;
 440         *accumulated_enqueued_ops += enqueued_op;
 441
 442         return enqueued_op;
 443 }
 444
 445 static uint16_t
 446 snow3g_pmd_enqueue_burst(void *queue_pair, struct rte_crypto_op **ops,
 447                 uint16_t nb_ops)
 448 {
 449         struct rte_crypto_op *c_ops[SNOW3G_MAX_BURST];
 450         struct rte_crypto_op *curr_c_op;
 451
 452         struct snow3g_session *prev_sess = NULL, *curr_sess = NULL;
 453         struct snow3g_qp *qp = queue_pair;
 454         unsigned i;
 455         uint8_t burst_size = 0;
 456         uint16_t enqueued_ops = 0;
 457         uint8_t processed_ops;
 458
 459         for (i = 0; i < nb_ops; i++) {
 460                 curr_c_op = ops[i];
 461
 462                 /* Set status as enqueued (not processed yet) by default. */
 463                 curr_c_op->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
 464
 465                 curr_sess = snow3g_get_session(qp, curr_c_op);
 466                 if (unlikely(curr_sess == NULL ||
 467                                 curr_sess->op == SNOW3G_OP_NOT_SUPPORTED)) {
 468                         curr_c_op->status =
 469                                         RTE_CRYPTO_OP_STATUS_INVALID_SESSION;
 470                         break;
 471                 }
 472
 473                 /* If length/offset is at bit-level, process this buffer alone. */
 474                 if (((curr_c_op->sym->cipher.data.length % BYTE_LEN) != 0)
 475                                 || ((curr_c_op->sym->cipher.data.offset
 476                                         % BYTE_LEN) != 0)) {
 477                         /* Process the ops of the previous session. */
 478                         if (prev_sess != NULL) {
 479                                 processed_ops = process_ops(c_ops, prev_sess,
 480                                 qp, burst_size, &enqueued_ops);
 481                                 if (processed_ops < burst_size) {
 482                                         burst_size = 0;
 483                                         break;
 484                                 }
 485
 486                                 burst_size = 0;
 487                                 prev_sess = NULL;
 488                         }
 489
 490                         processed_ops = process_op_bit(curr_c_op, curr_sess,
 491                                                         qp, &enqueued_ops);
 492                         if (processed_ops != 1)
 493                                 break;
 494
 495                         continue;
 496                 }
 497
 498                 /* Batch ops that share the same session. */
 499                 if (prev_sess == NULL) {
 500                         prev_sess = curr_sess;
 501                         c_ops[burst_size++] = curr_c_op;
 502                 } else if (curr_sess == prev_sess) {
 503                         c_ops[burst_size++] = curr_c_op;
 504                         /*
 505                          * When there are enough ops to process in a batch,
 506                          * process them, and start a new batch.
 507                          */
 508                         if (burst_size == SNOW3G_MAX_BURST) {
 509                                 processed_ops = process_ops(c_ops, prev_sess,
 510                                                 qp, burst_size, &enqueued_ops);
 511                                 if (processed_ops < burst_size) {
 512                                         burst_size = 0;
 513                                         break;
 514                                 }
 515
 516                                 burst_size = 0;
 517                                 prev_sess = NULL;
 518                         }
 519                 } else {
 520                         /*
 521                          * Different session, process the ops
 522                          * of the previous session.
 523                          */
 524                         processed_ops = process_ops(c_ops, prev_sess,
 525                                         qp, burst_size, &enqueued_ops);
 526                         if (processed_ops < burst_size) {
 527                                 burst_size = 0;
 528                                 break;
 529                         }
 530
 531                         burst_size = 0;
 532                         prev_sess = curr_sess;
 533
 534                         c_ops[burst_size++] = curr_c_op;
 535                 }
 536         }
 537
 538         if (burst_size != 0) {
 539                 /* Process the crypto ops of the last session. */
 540                 processed_ops = process_ops(c_ops, prev_sess,
 541                                 qp, burst_size, &enqueued_ops);
 542         }
 543
 544         qp->qp_stats.enqueue_err_count += nb_ops - enqueued_ops;
 545         return enqueued_ops;
 546 }
 547
 548 static uint16_t
 549 snow3g_pmd_dequeue_burst(void *queue_pair,
 550                 struct rte_crypto_op **c_ops, uint16_t nb_ops)
 551 {
 552         struct snow3g_qp *qp = queue_pair;
 553
 554         unsigned nb_dequeued;
 555
 556         nb_dequeued = rte_ring_dequeue_burst(qp->processed_ops,
 557                         (void **)c_ops, nb_ops);
 558         qp->qp_stats.dequeued_count += nb_dequeued;
 559
 560         return nb_dequeued;
 561 }
 562
 563 static int cryptodev_snow3g_remove(const char *name);
 564
 565 static int
 566 cryptodev_snow3g_create(const char *name,
 567                 struct rte_crypto_vdev_init_params *init_params)
 568 {
 569         struct rte_cryptodev *dev;
 570         char crypto_dev_name[RTE_CRYPTODEV_NAME_MAX_LEN];
 571         struct snow3g_private *internals;
 572         uint64_t cpu_flags = 0;
 573
 574         /* Check CPU for supported vector instruction set */
 575         if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_SSE4_1))
 576                 cpu_flags |= RTE_CRYPTODEV_FF_CPU_SSE;
 577         else {
 578                 SNOW3G_LOG_ERR("Vector instructions are not supported by CPU");
 579                 return -EFAULT;
 580         }
 581
 582
 583         /* Create a unique device name. */
 584         if (create_unique_device_name(crypto_dev_name,
 585                         RTE_CRYPTODEV_NAME_MAX_LEN) != 0) {
 586                 SNOW3G_LOG_ERR("failed to create unique cryptodev name");
 587                 return -EINVAL;
 588         }
 589
 590         dev = rte_cryptodev_pmd_virtual_dev_init(crypto_dev_name,
 591                         sizeof(struct snow3g_private), init_params->socket_id);
 592         if (dev == NULL) {
 593                 SNOW3G_LOG_ERR("failed to create cryptodev vdev");
 594                 goto init_error;
 595         }
 596
 597         dev->dev_type = RTE_CRYPTODEV_SNOW3G_PMD;
 598         dev->dev_ops = rte_snow3g_pmd_ops;
 599
 600         /* Register RX/TX burst functions for data path. */
 601         dev->dequeue_burst = snow3g_pmd_dequeue_burst;
 602         dev->enqueue_burst = snow3g_pmd_enqueue_burst;
 603
 604         dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
 605                         RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
 606                         cpu_flags;
 607
 608         internals = dev->data->dev_private;
 609
 610         internals->max_nb_queue_pairs = init_params->max_nb_queue_pairs;
 611         internals->max_nb_sessions = init_params->max_nb_sessions;
 612
 613         return 0;
 614 init_error:
 615         SNOW3G_LOG_ERR("driver %s: cryptodev_snow3g_create failed", name);
 616
 617         cryptodev_snow3g_remove(crypto_dev_name);
 618         return -EFAULT;
 619 }
 620
 621 static int
 622 cryptodev_snow3g_probe(const char *name,
 623                 const char *input_args)
 624 {
 625         struct rte_crypto_vdev_init_params init_params = {
 626                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_QUEUE_PAIRS,
 627                 RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_SESSIONS,
 628                 rte_socket_id()
 629         };
 630
 631         rte_cryptodev_parse_vdev_init_params(&init_params, input_args);
 632
 633         RTE_LOG(INFO, PMD, "Initialising %s on NUMA node %d\n", name,
 634                         init_params.socket_id);
 635         RTE_LOG(INFO, PMD, "  Max number of queue pairs = %d\n",
 636                         init_params.max_nb_queue_pairs);
 637         RTE_LOG(INFO, PMD, "  Max number of sessions = %d\n",
 638                         init_params.max_nb_sessions);
 639
 640         return cryptodev_snow3g_create(name, &init_params);
 641 }
 642
 643 static int
 644 cryptodev_snow3g_remove(const char *name)
 645 {
 646         if (name == NULL)
 647                 return -EINVAL;
 648
 649         RTE_LOG(INFO, PMD, "Closing SNOW 3G crypto device %s"
 650                         " on numa socket %u\n",
 651                         name, rte_socket_id());
 652
 653         return 0;
 654 }
 655
 656 static struct rte_vdev_driver cryptodev_snow3g_pmd_drv = {
 657         .probe = cryptodev_snow3g_probe,
 658         .remove = cryptodev_snow3g_remove
 659 };
 660
 661 RTE_PMD_REGISTER_VDEV(CRYPTODEV_NAME_SNOW3G_PMD, cryptodev_snow3g_pmd_drv);
 662 RTE_PMD_REGISTER_ALIAS(CRYPTODEV_NAME_SNOW3G_PMD, cryptodev_snow3g_pmd);
 663 RTE_PMD_REGISTER_PARAM_STRING(CRYPTODEV_NAME_SNOW3G_PMD,
 664         "max_nb_queue_pairs=<int> "
 665         "max_nb_sessions=<int> "
 666         "socket_id=<int>");