drivers/crypto/aesni_mb/rte_aesni_mb_pmd_ops.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2015-2017 Intel Corporation
   3  */
   4
   5 #include <string.h>
   6
   7 #include <rte_common.h>
   8 #include <rte_malloc.h>
   9 #include <rte_cryptodev_pmd.h>
  10
  11 #include "rte_aesni_mb_pmd_private.h"
  12
  13
  14 static const struct rte_cryptodev_capabilities aesni_mb_pmd_capabilities[] = {
  15         {       /* MD5 HMAC */
  16                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  17                 {.sym = {
  18                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
  19                         {.auth = {
  20                                 .algo = RTE_CRYPTO_AUTH_MD5_HMAC,
  21                                 .block_size = 64,
  22                                 .key_size = {
  23                                         .min = 1,
  24                                         .max = 64,
  25                                         .increment = 1
  26                                 },
  27                                 .digest_size = {
  28 #if IMB_VERSION_NUM >= IMB_VERSION(0, 50, 0)
  29                                         .min = 1,
  30                                         .max = 16,
  31                                         .increment = 1
  32 #else
  33                                         .min = 12,
  34                                         .max = 12,
  35                                         .increment = 0
  36 #endif
  37                                 },
  38                                 .iv_size = { 0 }
  39                         }, }
  40                 }, }
  41         },
  42         {       /* SHA1 HMAC */
  43                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  44                 {.sym = {
  45                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
  46                         {.auth = {
  47                                 .algo = RTE_CRYPTO_AUTH_SHA1_HMAC,
  48                                 .block_size = 64,
  49                                 .key_size = {
  50                                         .min = 1,
  51                                         .max = 64,
  52                                         .increment = 1
  53                                 },
  54                                 .digest_size = {
  55 #if IMB_VERSION_NUM >= IMB_VERSION(0, 50, 0)
  56                                         .min = 1,
  57                                         .max = 20,
  58                                         .increment = 1
  59 #else
  60                                         .min = 12,
  61                                         .max = 12,
  62                                         .increment = 0
  63 #endif
  64                                 },
  65                                 .iv_size = { 0 }
  66                         }, }
  67                 }, }
  68         },
  69         {       /* SHA224 HMAC */
  70                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  71                 {.sym = {
  72                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
  73                         {.auth = {
  74                                 .algo = RTE_CRYPTO_AUTH_SHA224_HMAC,
  75                                 .block_size = 64,
  76                                 .key_size = {
  77                                         .min = 1,
  78                                         .max = 64,
  79                                         .increment = 1
  80                                 },
  81                                 .digest_size = {
  82 #if IMB_VERSION_NUM >= IMB_VERSION(0, 50, 0)
  83                                         .min = 1,
  84                                         .max = 28,
  85                                         .increment = 1
  86 #else
  87                                         .min = 14,
  88                                         .max = 14,
  89                                         .increment = 0
  90 #endif
  91                                 },
  92                                 .iv_size = { 0 }
  93                         }, }
  94                 }, }
  95         },
  96         {       /* SHA256 HMAC */
  97                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  98                 {.sym = {
  99                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 100                         {.auth = {
 101                                 .algo = RTE_CRYPTO_AUTH_SHA256_HMAC,
 102                                 .block_size = 64,
 103                                 .key_size = {
 104                                         .min = 1,
 105                                         .max = 64,
 106                                         .increment = 1
 107                                 },
 108                                 .digest_size = {
 109 #if IMB_VERSION_NUM >= IMB_VERSION(0, 50, 0)
 110                                         .min = 1,
 111                                         .max = 32,
 112                                         .increment = 1
 113 #else
 114                                         .min = 16,
 115                                         .max = 16,
 116                                         .increment = 0
 117 #endif
 118                                 },
 119                                 .iv_size = { 0 }
 120                         }, }
 121                 }, }
 122         },
 123         {       /* SHA384 HMAC */
 124                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 125                 {.sym = {
 126                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 127                         {.auth = {
 128                                 .algo = RTE_CRYPTO_AUTH_SHA384_HMAC,
 129                                 .block_size = 128,
 130                                 .key_size = {
 131                                         .min = 1,
 132                                         .max = 128,
 133                                         .increment = 1
 134                                 },
 135                                 .digest_size = {
 136 #if IMB_VERSION_NUM >= IMB_VERSION(0, 50, 0)
 137                                         .min = 1,
 138                                         .max = 48,
 139                                         .increment = 1
 140 #else
 141                                         .min = 24,
 142                                         .max = 24,
 143                                         .increment = 0
 144 #endif
 145                                 },
 146                                 .iv_size = { 0 }
 147                         }, }
 148                 }, }
 149         },
 150         {       /* SHA512 HMAC */
 151                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 152                 {.sym = {
 153                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 154                         {.auth = {
 155                                 .algo = RTE_CRYPTO_AUTH_SHA512_HMAC,
 156                                 .block_size = 128,
 157                                 .key_size = {
 158                                         .min = 1,
 159                                         .max = 128,
 160                                         .increment = 1
 161                                 },
 162                                 .digest_size = {
 163 #if IMB_VERSION_NUM >= IMB_VERSION(0, 50, 0)
 164                                         .min = 1,
 165                                         .max = 64,
 166                                         .increment = 1
 167 #else
 168                                         .min = 32,
 169                                         .max = 32,
 170                                         .increment = 0
 171 #endif
 172                                 },
 173                                 .iv_size = { 0 }
 174                         }, }
 175                 }, }
 176         },
 177         {       /* AES XCBC HMAC */
 178                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 179                 {.sym = {
 180                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 181                         {.auth = {
 182                                 .algo = RTE_CRYPTO_AUTH_AES_XCBC_MAC,
 183                                 .block_size = 16,
 184                                 .key_size = {
 185                                         .min = 16,
 186                                         .max = 16,
 187                                         .increment = 0
 188                                 },
 189                                 .digest_size = {
 190                                         .min = 12,
 191                                         .max = 12,
 192                                         .increment = 0
 193                                 },
 194                                 .iv_size = { 0 }
 195                         }, }
 196                 }, }
 197         },
 198         {       /* AES CBC */
 199                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 200                 {.sym = {
 201                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 202                         {.cipher = {
 203                                 .algo = RTE_CRYPTO_CIPHER_AES_CBC,
 204                                 .block_size = 16,
 205                                 .key_size = {
 206                                         .min = 16,
 207                                         .max = 32,
 208                                         .increment = 8
 209                                 },
 210                                 .iv_size = {
 211                                         .min = 16,
 212                                         .max = 16,
 213                                         .increment = 0
 214                                 }
 215                         }, }
 216                 }, }
 217         },
 218         {       /* AES CTR */
 219                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 220                 {.sym = {
 221                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 222                         {.cipher = {
 223                                 .algo = RTE_CRYPTO_CIPHER_AES_CTR,
 224                                 .block_size = 16,
 225                                 .key_size = {
 226                                         .min = 16,
 227                                         .max = 32,
 228                                         .increment = 8
 229                                 },
 230                                 .iv_size = {
 231                                         .min = 12,
 232                                         .max = 16,
 233                                         .increment = 4
 234                                 }
 235                         }, }
 236                 }, }
 237         },
 238         {       /* AES DOCSIS BPI */
 239                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 240                 {.sym = {
 241                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 242                         {.cipher = {
 243                                 .algo = RTE_CRYPTO_CIPHER_AES_DOCSISBPI,
 244                                 .block_size = 16,
 245                                 .key_size = {
 246                                         .min = 16,
 247                                         .max = 16,
 248                                         .increment = 0
 249                                 },
 250                                 .iv_size = {
 251                                         .min = 16,
 252                                         .max = 16,
 253                                         .increment = 0
 254                                 }
 255                         }, }
 256                 }, }
 257         },
 258         {       /* DES CBC */
 259                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 260                 {.sym = {
 261                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 262                         {.cipher = {
 263                                 .algo = RTE_CRYPTO_CIPHER_DES_CBC,
 264                                 .block_size = 8,
 265                                 .key_size = {
 266                                         .min = 8,
 267                                         .max = 8,
 268                                         .increment = 0
 269                                 },
 270                                 .iv_size = {
 271                                         .min = 8,
 272                                         .max = 8,
 273                                         .increment = 0
 274                                 }
 275                         }, }
 276                 }, }
 277         },
 278         {       /*  3DES CBC */
 279                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 280                 {.sym = {
 281                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 282                         {.cipher = {
 283                                 .algo = RTE_CRYPTO_CIPHER_3DES_CBC,
 284                                 .block_size = 8,
 285                                 .key_size = {
 286                                         .min = 8,
 287                                         .max = 24,
 288                                         .increment = 8
 289                                 },
 290                                 .iv_size = {
 291                                         .min = 8,
 292                                         .max = 8,
 293                                         .increment = 0
 294                                 }
 295                         }, }
 296                 }, }
 297         },
 298         {       /* DES DOCSIS BPI */
 299                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 300                 {.sym = {
 301                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 302                         {.cipher = {
 303                                 .algo = RTE_CRYPTO_CIPHER_DES_DOCSISBPI,
 304                                 .block_size = 8,
 305                                 .key_size = {
 306                                         .min = 8,
 307                                         .max = 8,
 308                                         .increment = 0
 309                                 },
 310                                 .iv_size = {
 311                                         .min = 8,
 312                                         .max = 8,
 313                                         .increment = 0
 314                                 }
 315                         }, }
 316                 }, }
 317         },
 318         {       /* AES CCM */
 319                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 320                 {.sym = {
 321                         .xform_type = RTE_CRYPTO_SYM_XFORM_AEAD,
 322                         {.aead = {
 323                                 .algo = RTE_CRYPTO_AEAD_AES_CCM,
 324                                 .block_size = 16,
 325                                 .key_size = {
 326                                         .min = 16,
 327                                         .max = 16,
 328                                         .increment = 0
 329                                 },
 330                                 .digest_size = {
 331                                         .min = 4,
 332                                         .max = 16,
 333                                         .increment = 2
 334                                 },
 335                                 .aad_size = {
 336                                         .min = 0,
 337                                         .max = 46,
 338                                         .increment = 1
 339                                 },
 340                                 .iv_size = {
 341                                         .min = 7,
 342                                         .max = 13,
 343                                         .increment = 1
 344                                 },
 345                         }, }
 346                 }, }
 347         },
 348         {       /* AES CMAC */
 349                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 350                 {.sym = {
 351                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 352                         {.auth = {
 353                                 .algo = RTE_CRYPTO_AUTH_AES_CMAC,
 354                                 .block_size = 16,
 355                                 .key_size = {
 356                                         .min = 16,
 357                                         .max = 16,
 358                                         .increment = 0
 359                                 },
 360                                 .digest_size = {
 361                                         .min = 12,
 362                                         .max = 16,
 363                                         .increment = 4
 364                                 },
 365                                 .iv_size = { 0 }
 366                         }, }
 367                 }, }
 368         },
 369         RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
 370 };
 371
 372
 373 /** Configure device */
 374 static int
 375 aesni_mb_pmd_config(__rte_unused struct rte_cryptodev *dev,
 376                 __rte_unused struct rte_cryptodev_config *config)
 377 {
 378         return 0;
 379 }
 380
 381 /** Start device */
 382 static int
 383 aesni_mb_pmd_start(__rte_unused struct rte_cryptodev *dev)
 384 {
 385         return 0;
 386 }
 387
 388 /** Stop device */
 389 static void
 390 aesni_mb_pmd_stop(__rte_unused struct rte_cryptodev *dev)
 391 {
 392 }
 393
 394 /** Close device */
 395 static int
 396 aesni_mb_pmd_close(__rte_unused struct rte_cryptodev *dev)
 397 {
 398         return 0;
 399 }
 400
 401
 402 /** Get device statistics */
 403 static void
 404 aesni_mb_pmd_stats_get(struct rte_cryptodev *dev,
 405                 struct rte_cryptodev_stats *stats)
 406 {
 407         int qp_id;
 408
 409         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 410                 struct aesni_mb_qp *qp = dev->data->queue_pairs[qp_id];
 411
 412                 stats->enqueued_count += qp->stats.enqueued_count;
 413                 stats->dequeued_count += qp->stats.dequeued_count;
 414
 415                 stats->enqueue_err_count += qp->stats.enqueue_err_count;
 416                 stats->dequeue_err_count += qp->stats.dequeue_err_count;
 417         }
 418 }
 419
 420 /** Reset device statistics */
 421 static void
 422 aesni_mb_pmd_stats_reset(struct rte_cryptodev *dev)
 423 {
 424         int qp_id;
 425
 426         for (qp_id = 0; qp_id < dev->data->nb_queue_pairs; qp_id++) {
 427                 struct aesni_mb_qp *qp = dev->data->queue_pairs[qp_id];
 428
 429                 memset(&qp->stats, 0, sizeof(qp->stats));
 430         }
 431 }
 432
 433
 434 /** Get device info */
 435 static void
 436 aesni_mb_pmd_info_get(struct rte_cryptodev *dev,
 437                 struct rte_cryptodev_info *dev_info)
 438 {
 439         struct aesni_mb_private *internals = dev->data->dev_private;
 440
 441         if (dev_info != NULL) {
 442                 dev_info->driver_id = dev->driver_id;
 443                 dev_info->feature_flags = dev->feature_flags;
 444                 dev_info->capabilities = aesni_mb_pmd_capabilities;
 445                 dev_info->max_nb_queue_pairs = internals->max_nb_queue_pairs;
 446                 /* No limit of number of sessions */
 447                 dev_info->sym.max_nb_sessions = 0;
 448         }
 449 }
 450
 451 /** Release queue pair */
 452 static int
 453 aesni_mb_pmd_qp_release(struct rte_cryptodev *dev, uint16_t qp_id)
 454 {
 455         struct aesni_mb_qp *qp = dev->data->queue_pairs[qp_id];
 456         struct rte_ring *r = NULL;
 457
 458         if (qp != NULL) {
 459                 r = rte_ring_lookup(qp->name);
 460                 if (r)
 461                         rte_ring_free(r);
 462                 if (qp->mb_mgr)
 463                         free_mb_mgr(qp->mb_mgr);
 464                 rte_free(qp);
 465                 dev->data->queue_pairs[qp_id] = NULL;
 466         }
 467         return 0;
 468 }
 469
 470 /** set a unique name for the queue pair based on it's name, dev_id and qp_id */
 471 static int
 472 aesni_mb_pmd_qp_set_unique_name(struct rte_cryptodev *dev,
 473                 struct aesni_mb_qp *qp)
 474 {
 475         unsigned n = snprintf(qp->name, sizeof(qp->name),
 476                         "aesni_mb_pmd_%u_qp_%u",
 477                         dev->data->dev_id, qp->id);
 478
 479         if (n >= sizeof(qp->name))
 480                 return -1;
 481
 482         return 0;
 483 }
 484
 485 /** Create a ring to place processed operations on */
 486 static struct rte_ring *
 487 aesni_mb_pmd_qp_create_processed_ops_ring(struct aesni_mb_qp *qp,
 488                 const char *str, unsigned int ring_size, int socket_id)
 489 {
 490         struct rte_ring *r;
 491         char ring_name[RTE_CRYPTODEV_NAME_MAX_LEN];
 492
 493         unsigned int n = snprintf(ring_name, sizeof(ring_name),
 494                                 "%s_%s",
 495                                 qp->name, str);
 496
 497         if (n >= sizeof(ring_name))
 498                 return NULL;
 499
 500         r = rte_ring_lookup(ring_name);
 501         if (r) {
 502                 if (rte_ring_get_size(r) >= ring_size) {
 503                         AESNI_MB_LOG(INFO, "Reusing existing ring %s for processed ops",
 504                         ring_name);
 505                         return r;
 506                 }
 507
 508                 AESNI_MB_LOG(ERR, "Unable to reuse existing ring %s for processed ops",
 509                         ring_name);
 510                 return NULL;
 511         }
 512
 513         return rte_ring_create(ring_name, ring_size, socket_id,
 514                         RING_F_SP_ENQ | RING_F_SC_DEQ);
 515 }
 516
 517 /** Setup a queue pair */
 518 static int
 519 aesni_mb_pmd_qp_setup(struct rte_cryptodev *dev, uint16_t qp_id,
 520                 const struct rte_cryptodev_qp_conf *qp_conf,
 521                 int socket_id, struct rte_mempool *session_pool)
 522 {
 523         struct aesni_mb_qp *qp = NULL;
 524         struct aesni_mb_private *internals = dev->data->dev_private;
 525         int ret = -1;
 526
 527         /* Free memory prior to re-allocation if needed. */
 528         if (dev->data->queue_pairs[qp_id] != NULL)
 529                 aesni_mb_pmd_qp_release(dev, qp_id);
 530
 531         /* Allocate the queue pair data structure. */
 532         qp = rte_zmalloc_socket("AES-NI PMD Queue Pair", sizeof(*qp),
 533                                         RTE_CACHE_LINE_SIZE, socket_id);
 534         if (qp == NULL)
 535                 return -ENOMEM;
 536
 537         qp->id = qp_id;
 538         dev->data->queue_pairs[qp_id] = qp;
 539
 540         if (aesni_mb_pmd_qp_set_unique_name(dev, qp))
 541                 goto qp_setup_cleanup;
 542
 543
 544         qp->mb_mgr = alloc_mb_mgr(0);
 545         if (qp->mb_mgr == NULL) {
 546                 ret = -ENOMEM;
 547                 goto qp_setup_cleanup;
 548         }
 549
 550         qp->op_fns = &job_ops[internals->vector_mode];
 551
 552         qp->ingress_queue = aesni_mb_pmd_qp_create_processed_ops_ring(qp,
 553                         "ingress", qp_conf->nb_descriptors, socket_id);
 554         if (qp->ingress_queue == NULL) {
 555                 ret = -1;
 556                 goto qp_setup_cleanup;
 557         }
 558
 559         qp->sess_mp = session_pool;
 560
 561         memset(&qp->stats, 0, sizeof(qp->stats));
 562
 563         char mp_name[RTE_MEMPOOL_NAMESIZE];
 564
 565         snprintf(mp_name, RTE_MEMPOOL_NAMESIZE,
 566                                 "digest_mp_%u_%u", dev->data->dev_id, qp_id);
 567
 568         /* Initialise multi-buffer manager */
 569         (*qp->op_fns->job.init_mgr)(qp->mb_mgr);
 570         return 0;
 571
 572 qp_setup_cleanup:
 573         if (qp) {
 574                 if (qp->mb_mgr == NULL)
 575                         free_mb_mgr(qp->mb_mgr);
 576                 rte_free(qp);
 577         }
 578
 579         return ret;
 580 }
 581
 582 /** Return the number of allocated queue pairs */
 583 static uint32_t
 584 aesni_mb_pmd_qp_count(struct rte_cryptodev *dev)
 585 {
 586         return dev->data->nb_queue_pairs;
 587 }
 588
 589 /** Returns the size of the aesni multi-buffer session structure */
 590 static unsigned
 591 aesni_mb_pmd_sym_session_get_size(struct rte_cryptodev *dev __rte_unused)
 592 {
 593         return sizeof(struct aesni_mb_session);
 594 }
 595
 596 /** Configure a aesni multi-buffer session from a crypto xform chain */
 597 static int
 598 aesni_mb_pmd_sym_session_configure(struct rte_cryptodev *dev,
 599                 struct rte_crypto_sym_xform *xform,
 600                 struct rte_cryptodev_sym_session *sess,
 601                 struct rte_mempool *mempool)
 602 {
 603         void *sess_private_data;
 604         struct aesni_mb_private *internals = dev->data->dev_private;
 605         int ret;
 606
 607         if (unlikely(sess == NULL)) {
 608                 AESNI_MB_LOG(ERR, "invalid session struct");
 609                 return -EINVAL;
 610         }
 611
 612         if (rte_mempool_get(mempool, &sess_private_data)) {
 613                 AESNI_MB_LOG(ERR,
 614                                 "Couldn't get object from session mempool");
 615                 return -ENOMEM;
 616         }
 617
 618         ret = aesni_mb_set_session_parameters(&job_ops[internals->vector_mode],
 619                         sess_private_data, xform);
 620         if (ret != 0) {
 621                 AESNI_MB_LOG(ERR, "failed configure session parameters");
 622
 623                 /* Return session to mempool */
 624                 rte_mempool_put(mempool, sess_private_data);
 625                 return ret;
 626         }
 627
 628         set_sym_session_private_data(sess, dev->driver_id,
 629                         sess_private_data);
 630
 631         return 0;
 632 }
 633
 634 /** Clear the memory of session so it doesn't leave key material behind */
 635 static void
 636 aesni_mb_pmd_sym_session_clear(struct rte_cryptodev *dev,
 637                 struct rte_cryptodev_sym_session *sess)
 638 {
 639         uint8_t index = dev->driver_id;
 640         void *sess_priv = get_sym_session_private_data(sess, index);
 641
 642         /* Zero out the whole structure */
 643         if (sess_priv) {
 644                 memset(sess_priv, 0, sizeof(struct aesni_mb_session));
 645                 struct rte_mempool *sess_mp = rte_mempool_from_obj(sess_priv);
 646                 set_sym_session_private_data(sess, index, NULL);
 647                 rte_mempool_put(sess_mp, sess_priv);
 648         }
 649 }
 650
 651 struct rte_cryptodev_ops aesni_mb_pmd_ops = {
 652                 .dev_configure          = aesni_mb_pmd_config,
 653                 .dev_start              = aesni_mb_pmd_start,
 654                 .dev_stop               = aesni_mb_pmd_stop,
 655                 .dev_close              = aesni_mb_pmd_close,
 656
 657                 .stats_get              = aesni_mb_pmd_stats_get,
 658                 .stats_reset            = aesni_mb_pmd_stats_reset,
 659
 660                 .dev_infos_get          = aesni_mb_pmd_info_get,
 661
 662                 .queue_pair_setup       = aesni_mb_pmd_qp_setup,
 663                 .queue_pair_release     = aesni_mb_pmd_qp_release,
 664                 .queue_pair_count       = aesni_mb_pmd_qp_count,
 665
 666                 .sym_session_get_size   = aesni_mb_pmd_sym_session_get_size,
 667                 .sym_session_configure  = aesni_mb_pmd_sym_session_configure,
 668                 .sym_session_clear      = aesni_mb_pmd_sym_session_clear
 669 };
 670
 671 struct rte_cryptodev_ops *rte_aesni_mb_pmd_ops = &aesni_mb_pmd_ops;