drivers/crypto/dpaa2_sec/dpaa2_sec_priv.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright (c) 2016 Freescale Semiconductor, Inc. All rights reserved.
   4  *   Copyright 2016 NXP
   5  *
   6  */
   7
   8 #ifndef _RTE_DPAA2_SEC_PMD_PRIVATE_H_
   9 #define _RTE_DPAA2_SEC_PMD_PRIVATE_H_
  10
  11 #include <rte_security_driver.h>
  12
  13 #define CRYPTODEV_NAME_DPAA2_SEC_PMD    crypto_dpaa2_sec
  14 /**< NXP DPAA2 - SEC PMD device name */
  15
  16 #define MAX_QUEUES              64
  17 #define MAX_DESC_SIZE           64
  18 /** private data structure for each DPAA2_SEC device */
  19 struct dpaa2_sec_dev_private {
  20         void *mc_portal; /**< MC Portal for configuring this device */
  21         void *hw; /**< Hardware handle for this device.Used by NADK framework */
  22         struct rte_mempool *fle_pool; /* per device memory pool for FLE */
  23         int32_t hw_id; /**< An unique ID of this device instance */
  24         int32_t vfio_fd; /**< File descriptor received via VFIO */
  25         uint16_t token; /**< Token required by DPxxx objects */
  26         unsigned int max_nb_queue_pairs;
  27         /**< Max number of queue pairs supported by device */
  28 };
  29
  30 struct dpaa2_sec_qp {
  31         struct dpaa2_queue rx_vq;
  32         struct dpaa2_queue tx_vq;
  33 };
  34
  35 enum shr_desc_type {
  36         DESC_UPDATE,
  37         DESC_FINAL,
  38         DESC_INITFINAL,
  39 };
  40
  41 #define DIR_ENC                 1
  42 #define DIR_DEC                 0
  43
  44 #define DPAA2_SET_FLC_EWS(flc)  (flc->word1_bits23_16 |= 0x1)
  45 #define DPAA2_SET_FLC_RSC(flc)  (flc->word1_bits31_24 |= 0x1)
  46 #define DPAA2_SET_FLC_REUSE_BS(flc) (flc->mode_bits |= 0x8000)
  47 #define DPAA2_SET_FLC_REUSE_FF(flc) (flc->mode_bits |= 0x2000)
  48
  49 /* SEC Flow Context Descriptor */
  50 struct sec_flow_context {
  51         /* word 0 */
  52         uint16_t word0_sdid;            /* 11-0  SDID */
  53         uint16_t word0_res;             /* 31-12 reserved */
  54
  55         /* word 1 */
  56         uint8_t word1_sdl;              /* 5-0 SDL */
  57                                         /* 7-6 reserved */
  58
  59         uint8_t word1_bits_15_8;        /* 11-8 CRID */
  60                                         /* 14-12 reserved */
  61                                         /* 15 CRJD */
  62
  63         uint8_t word1_bits23_16;        /* 16  EWS */
  64                                         /* 17 DAC */
  65                                         /* 18,19,20 ? */
  66                                         /* 23-21 reserved */
  67
  68         uint8_t word1_bits31_24;        /* 24 RSC */
  69                                         /* 25 RBMT */
  70                                         /* 31-26 reserved */
  71
  72         /* word 2  RFLC[31-0] */
  73         uint32_t word2_rflc_31_0;
  74
  75         /* word 3  RFLC[63-32] */
  76         uint32_t word3_rflc_63_32;
  77
  78         /* word 4 */
  79         uint16_t word4_iicid;           /* 15-0  IICID */
  80         uint16_t word4_oicid;           /* 31-16 OICID */
  81
  82         /* word 5 */
  83         uint32_t word5_ofqid:24;                /* 23-0 OFQID */
  84         uint32_t word5_31_24:8;
  85                                         /* 24 OSC */
  86                                         /* 25 OBMT */
  87                                         /* 29-26 reserved */
  88                                         /* 31-30 ICR */
  89
  90         /* word 6 */
  91         uint32_t word6_oflc_31_0;
  92
  93         /* word 7 */
  94         uint32_t word7_oflc_63_32;
  95
  96         /* Word 8-15 storage profiles */
  97         uint16_t dl;                    /**<  DataLength(correction) */
  98         uint16_t reserved;              /**< reserved */
  99         uint16_t dhr;                   /**< DataHeadRoom(correction) */
 100         uint16_t mode_bits;             /**< mode bits */
 101         uint16_t bpv0;                  /**< buffer pool0 valid */
 102         uint16_t bpid0;                 /**< Bypass Memory Translation */
 103         uint16_t bpv1;                  /**< buffer pool1 valid */
 104         uint16_t bpid1;                 /**< Bypass Memory Translation */
 105         uint64_t word_12_15[2];         /**< word 12-15 are reserved */
 106 };
 107
 108 struct sec_flc_desc {
 109         struct sec_flow_context flc;
 110         uint32_t desc[MAX_DESC_SIZE];
 111 };
 112
 113 struct ctxt_priv {
 114         struct rte_mempool *fle_pool; /* per device memory pool for FLE */
 115         struct sec_flc_desc flc_desc[0];
 116 };
 117
 118 enum dpaa2_sec_op_type {
 119         DPAA2_SEC_NONE,  /*!< No Cipher operations*/
 120         DPAA2_SEC_CIPHER,/*!< CIPHER operations */
 121         DPAA2_SEC_AUTH,  /*!< Authentication Operations */
 122         DPAA2_SEC_AEAD,  /*!< AEAD (AES-GCM/CCM) type operations */
 123         DPAA2_SEC_CIPHER_HASH,  /*!< Authenticated Encryption with
 124                                  * associated data
 125                                  */
 126         DPAA2_SEC_HASH_CIPHER,  /*!< Encryption with Authenticated
 127                                  * associated data
 128                                  */
 129         DPAA2_SEC_IPSEC, /*!< IPSEC protocol operations*/
 130         DPAA2_SEC_PDCP,  /*!< PDCP protocol operations*/
 131         DPAA2_SEC_PKC,   /*!< Public Key Cryptographic Operations */
 132         DPAA2_SEC_MAX
 133 };
 134
 135 struct dpaa2_sec_aead_ctxt {
 136         uint16_t auth_only_len; /*!< Length of data for Auth only */
 137         uint8_t auth_cipher_text;       /**< Authenticate/cipher ordering */
 138 };
 139
 140 /*
 141  * The structure is to be filled by user for PDCP Protocol
 142  */
 143 struct dpaa2_pdcp_ctxt {
 144         enum rte_security_pdcp_domain domain; /*!< Data/Control mode*/
 145         int8_t bearer;  /*!< PDCP bearer ID */
 146         int8_t pkt_dir;/*!< PDCP Frame Direction 0:UL 1:DL*/
 147         int8_t hfn_ovd;/*!< Overwrite HFN per packet*/
 148         uint32_t hfn;   /*!< Hyper Frame Number */
 149         uint32_t hfn_threshold; /*!< HFN Threashold for key renegotiation */
 150         uint8_t sn_size;        /*!< Sequence number size, 7/12/15 */
 151 };
 152
 153 typedef struct dpaa2_sec_session_entry {
 154         void *ctxt;
 155         uint8_t ctxt_type;
 156         uint8_t dir;         /*!< Operation Direction */
 157         enum rte_crypto_cipher_algorithm cipher_alg; /*!< Cipher Algorithm*/
 158         enum rte_crypto_auth_algorithm auth_alg; /*!< Authentication Algorithm*/
 159         enum rte_crypto_aead_algorithm aead_alg; /*!< AEAD Algorithm*/
 160         union {
 161                 struct {
 162                         uint8_t *data;  /**< pointer to key data */
 163                         size_t length;  /**< key length in bytes */
 164                 } aead_key;
 165                 struct {
 166                         struct {
 167                                 uint8_t *data;  /**< pointer to key data */
 168                                 size_t length;  /**< key length in bytes */
 169                         } cipher_key;
 170                         struct {
 171                                 uint8_t *data;  /**< pointer to key data */
 172                                 size_t length;  /**< key length in bytes */
 173                         } auth_key;
 174                 };
 175         };
 176         union {
 177                 struct {
 178                         struct {
 179                                 uint16_t length; /**< IV length in bytes */
 180                                 uint16_t offset; /**< IV offset in bytes */
 181                         } iv;
 182                         uint16_t digest_length;
 183                         uint8_t status;
 184                         union {
 185                                 struct dpaa2_sec_aead_ctxt aead_ctxt;
 186                         } ext_params;
 187                 };
 188                 struct dpaa2_pdcp_ctxt pdcp;
 189         };
 190 } dpaa2_sec_session;
 191
 192 static const struct rte_cryptodev_capabilities dpaa2_sec_capabilities[] = {
 193         {       /* MD5 HMAC */
 194                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 195                 {.sym = {
 196                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 197                         {.auth = {
 198                                 .algo = RTE_CRYPTO_AUTH_MD5_HMAC,
 199                                 .block_size = 64,
 200                                 .key_size = {
 201                                         .min = 1,
 202                                         .max = 64,
 203                                         .increment = 1
 204                                 },
 205                                 .digest_size = {
 206                                         .min = 1,
 207                                         .max = 16,
 208                                         .increment = 1
 209                                 },
 210                                 .iv_size = { 0 }
 211                         }, }
 212                 }, }
 213         },
 214         {       /* SHA1 HMAC */
 215                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 216                 {.sym = {
 217                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 218                         {.auth = {
 219                                 .algo = RTE_CRYPTO_AUTH_SHA1_HMAC,
 220                                 .block_size = 64,
 221                                 .key_size = {
 222                                         .min = 1,
 223                                         .max = 64,
 224                                         .increment = 1
 225                                 },
 226                                 .digest_size = {
 227                                         .min = 1,
 228                                         .max = 20,
 229                                         .increment = 1
 230                                 },
 231                                 .iv_size = { 0 }
 232                         }, }
 233                 }, }
 234         },
 235         {       /* SHA224 HMAC */
 236                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 237                 {.sym = {
 238                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 239                         {.auth = {
 240                                 .algo = RTE_CRYPTO_AUTH_SHA224_HMAC,
 241                                 .block_size = 64,
 242                                 .key_size = {
 243                                         .min = 1,
 244                                         .max = 64,
 245                                         .increment = 1
 246                                 },
 247                                 .digest_size = {
 248                                         .min = 1,
 249                                         .max = 28,
 250                                         .increment = 1
 251                                 },
 252                                 .iv_size = { 0 }
 253                         }, }
 254                 }, }
 255         },
 256         {       /* SHA256 HMAC */
 257                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 258                 {.sym = {
 259                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 260                         {.auth = {
 261                                 .algo = RTE_CRYPTO_AUTH_SHA256_HMAC,
 262                                 .block_size = 64,
 263                                 .key_size = {
 264                                         .min = 1,
 265                                         .max = 64,
 266                                         .increment = 1
 267                                 },
 268                                 .digest_size = {
 269                                         .min = 1,
 270                                         .max = 32,
 271                                         .increment = 1
 272                                 },
 273                                 .iv_size = { 0 }
 274                                 }, }
 275                         }, }
 276                 },
 277         {       /* SHA384 HMAC */
 278                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 279                 {.sym = {
 280                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 281                         {.auth = {
 282                                 .algo = RTE_CRYPTO_AUTH_SHA384_HMAC,
 283                                 .block_size = 128,
 284                                 .key_size = {
 285                                         .min = 1,
 286                                         .max = 128,
 287                                         .increment = 1
 288                                 },
 289                                 .digest_size = {
 290                                         .min = 1,
 291                                         .max = 48,
 292                                         .increment = 1
 293                                 },
 294                                 .iv_size = { 0 }
 295                         }, }
 296                 }, }
 297         },
 298         {       /* SHA512 HMAC */
 299                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 300                 {.sym = {
 301                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 302                         {.auth = {
 303                                 .algo = RTE_CRYPTO_AUTH_SHA512_HMAC,
 304                                 .block_size = 128,
 305                                 .key_size = {
 306                                         .min = 1,
 307                                         .max = 128,
 308                                         .increment = 1
 309                                 },
 310                                 .digest_size = {
 311                                         .min = 1,
 312                                         .max = 64,
 313                                         .increment = 1
 314                                 },
 315                                 .iv_size = { 0 }
 316                         }, }
 317                 }, }
 318         },
 319         {       /* AES GCM */
 320                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 321                 {.sym = {
 322                         .xform_type = RTE_CRYPTO_SYM_XFORM_AEAD,
 323                         {.aead = {
 324                                 .algo = RTE_CRYPTO_AEAD_AES_GCM,
 325                                 .block_size = 16,
 326                                 .key_size = {
 327                                         .min = 16,
 328                                         .max = 32,
 329                                         .increment = 8
 330                                 },
 331                                 .digest_size = {
 332                                         .min = 8,
 333                                         .max = 16,
 334                                         .increment = 4
 335                                 },
 336                                 .aad_size = {
 337                                         .min = 0,
 338                                         .max = 240,
 339                                         .increment = 1
 340                                 },
 341                                 .iv_size = {
 342                                         .min = 12,
 343                                         .max = 12,
 344                                         .increment = 0
 345                                 },
 346                         }, }
 347                 }, }
 348         },
 349         {       /* AES CBC */
 350                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 351                 {.sym = {
 352                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 353                         {.cipher = {
 354                                 .algo = RTE_CRYPTO_CIPHER_AES_CBC,
 355                                 .block_size = 16,
 356                                 .key_size = {
 357                                         .min = 16,
 358                                         .max = 32,
 359                                         .increment = 8
 360                                 },
 361                                 .iv_size = {
 362                                         .min = 16,
 363                                         .max = 16,
 364                                         .increment = 0
 365                                 }
 366                         }, }
 367                 }, }
 368         },
 369         {       /* AES CTR */
 370                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 371                 {.sym = {
 372                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 373                         {.cipher = {
 374                                 .algo = RTE_CRYPTO_CIPHER_AES_CTR,
 375                                 .block_size = 16,
 376                                 .key_size = {
 377                                         .min = 16,
 378                                         .max = 32,
 379                                         .increment = 8
 380                                 },
 381                                 .iv_size = {
 382                                         .min = 16,
 383                                         .max = 16,
 384                                         .increment = 0
 385                                 },
 386                         }, }
 387                 }, }
 388         },
 389         {       /* 3DES CBC */
 390                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 391                 {.sym = {
 392                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 393                         {.cipher = {
 394                                 .algo = RTE_CRYPTO_CIPHER_3DES_CBC,
 395                                 .block_size = 8,
 396                                 .key_size = {
 397                                         .min = 16,
 398                                         .max = 24,
 399                                         .increment = 8
 400                                 },
 401                                 .iv_size = {
 402                                         .min = 8,
 403                                         .max = 8,
 404                                         .increment = 0
 405                                 }
 406                         }, }
 407                 }, }
 408         },
 409
 410         RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
 411 };
 412
 413 static const struct rte_cryptodev_capabilities dpaa2_pdcp_capabilities[] = {
 414         {       /* SNOW 3G (UIA2) */
 415                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 416                 {.sym = {
 417                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 418                         {.auth = {
 419                                 .algo = RTE_CRYPTO_AUTH_SNOW3G_UIA2,
 420                                 .block_size = 16,
 421                                 .key_size = {
 422                                         .min = 16,
 423                                         .max = 16,
 424                                         .increment = 0
 425                                 },
 426                                 .digest_size = {
 427                                         .min = 4,
 428                                         .max = 4,
 429                                         .increment = 0
 430                                 },
 431                                 .iv_size = {
 432                                         .min = 16,
 433                                         .max = 16,
 434                                         .increment = 0
 435                                 }
 436                         }, }
 437                 }, }
 438         },
 439         {       /* SNOW 3G (UEA2) */
 440                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 441                 {.sym = {
 442                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 443                         {.cipher = {
 444                                 .algo = RTE_CRYPTO_CIPHER_SNOW3G_UEA2,
 445                                 .block_size = 16,
 446                                 .key_size = {
 447                                         .min = 16,
 448                                         .max = 16,
 449                                         .increment = 0
 450                                 },
 451                                 .iv_size = {
 452                                         .min = 16,
 453                                         .max = 16,
 454                                         .increment = 0
 455                                 }
 456                         }, }
 457                 }, }
 458         },
 459         {       /* AES CTR */
 460                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 461                 {.sym = {
 462                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 463                         {.cipher = {
 464                                 .algo = RTE_CRYPTO_CIPHER_AES_CTR,
 465                                 .block_size = 16,
 466                                 .key_size = {
 467                                         .min = 16,
 468                                         .max = 32,
 469                                         .increment = 8
 470                                 },
 471                                 .iv_size = {
 472                                         .min = 16,
 473                                         .max = 16,
 474                                         .increment = 0
 475                                 }
 476                         }, }
 477                 }, }
 478         },
 479         {       /* NULL (AUTH) */
 480                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 481                 {.sym = {
 482                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 483                         {.auth = {
 484                                 .algo = RTE_CRYPTO_AUTH_NULL,
 485                                 .block_size = 1,
 486                                 .key_size = {
 487                                         .min = 0,
 488                                         .max = 0,
 489                                         .increment = 0
 490                                 },
 491                                 .digest_size = {
 492                                         .min = 0,
 493                                         .max = 0,
 494                                         .increment = 0
 495                                 },
 496                                 .iv_size = { 0 }
 497                         }, },
 498                 }, },
 499         },
 500         {       /* NULL (CIPHER) */
 501                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 502                 {.sym = {
 503                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 504                         {.cipher = {
 505                                 .algo = RTE_CRYPTO_CIPHER_NULL,
 506                                 .block_size = 1,
 507                                 .key_size = {
 508                                         .min = 0,
 509                                         .max = 0,
 510                                         .increment = 0
 511                                 },
 512                                 .iv_size = {
 513                                         .min = 0,
 514                                         .max = 0,
 515                                         .increment = 0
 516                                 }
 517                         }, },
 518                 }, }
 519         },
 520         {       /* ZUC (EEA3) */
 521                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 522                 {.sym = {
 523                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 524                         {.cipher = {
 525                                 .algo = RTE_CRYPTO_CIPHER_ZUC_EEA3,
 526                                 .block_size = 16,
 527                                 .key_size = {
 528                                         .min = 16,
 529                                         .max = 16,
 530                                         .increment = 0
 531                                 },
 532                                 .iv_size = {
 533                                         .min = 16,
 534                                         .max = 16,
 535                                         .increment = 0
 536                                 }
 537                         }, }
 538                 }, }
 539         },
 540         {       /* ZUC (EIA3) */
 541                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 542                 {.sym = {
 543                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 544                         {.auth = {
 545                                 .algo = RTE_CRYPTO_AUTH_ZUC_EIA3,
 546                                 .block_size = 16,
 547                                 .key_size = {
 548                                         .min = 16,
 549                                         .max = 16,
 550                                         .increment = 0
 551                                 },
 552                                 .digest_size = {
 553                                         .min = 4,
 554                                         .max = 4,
 555                                         .increment = 0
 556                                 },
 557                                 .iv_size = {
 558                                         .min = 16,
 559                                         .max = 16,
 560                                         .increment = 0
 561                                 }
 562                         }, }
 563                 }, }
 564         },
 565
 566         RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
 567 };
 568
 569 static const struct rte_security_capability dpaa2_sec_security_cap[] = {
 570         { /* IPsec Lookaside Protocol offload ESP Transport Egress */
 571                 .action = RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL,
 572                 .protocol = RTE_SECURITY_PROTOCOL_IPSEC,
 573                 .ipsec = {
 574                         .proto = RTE_SECURITY_IPSEC_SA_PROTO_ESP,
 575                         .mode = RTE_SECURITY_IPSEC_SA_MODE_TUNNEL,
 576                         .direction = RTE_SECURITY_IPSEC_SA_DIR_EGRESS,
 577                         .options = { 0 }
 578                 },
 579                 .crypto_capabilities = dpaa2_sec_capabilities
 580         },
 581         { /* IPsec Lookaside Protocol offload ESP Tunnel Ingress */
 582                 .action = RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL,
 583                 .protocol = RTE_SECURITY_PROTOCOL_IPSEC,
 584                 .ipsec = {
 585                         .proto = RTE_SECURITY_IPSEC_SA_PROTO_ESP,
 586                         .mode = RTE_SECURITY_IPSEC_SA_MODE_TUNNEL,
 587                         .direction = RTE_SECURITY_IPSEC_SA_DIR_INGRESS,
 588                         .options = { 0 }
 589                 },
 590                 .crypto_capabilities = dpaa2_sec_capabilities
 591         },
 592         { /* PDCP Lookaside Protocol offload Data */
 593                 .action = RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL,
 594                 .protocol = RTE_SECURITY_PROTOCOL_PDCP,
 595                 .pdcp = {
 596                         .domain = RTE_SECURITY_PDCP_MODE_DATA,
 597                         .capa_flags = 0
 598                 },
 599                 .crypto_capabilities = dpaa2_pdcp_capabilities
 600         },
 601         { /* PDCP Lookaside Protocol offload Control */
 602                 .action = RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL,
 603                 .protocol = RTE_SECURITY_PROTOCOL_PDCP,
 604                 .pdcp = {
 605                         .domain = RTE_SECURITY_PDCP_MODE_CONTROL,
 606                         .capa_flags = 0
 607                 },
 608                 .crypto_capabilities = dpaa2_pdcp_capabilities
 609         },
 610         {
 611                 .action = RTE_SECURITY_ACTION_TYPE_NONE
 612         }
 613 };
 614
 615 /**
 616  * Checksum
 617  *
 618  * @param buffer calculate chksum for buffer
 619  * @param len    buffer length
 620  *
 621  * @return checksum value in host cpu order
 622  */
 623 static inline uint16_t
 624 calc_chksum(void *buffer, int len)
 625 {
 626         uint16_t *buf = (uint16_t *)buffer;
 627         uint32_t sum = 0;
 628         uint16_t result;
 629
 630         for (sum = 0; len > 1; len -= 2)
 631                 sum += *buf++;
 632
 633         if (len == 1)
 634                 sum += *(unsigned char *)buf;
 635
 636         sum = (sum >> 16) + (sum & 0xFFFF);
 637         sum += (sum >> 16);
 638         result = ~sum;
 639
 640         return  result;
 641 }
 642
 643 #endif /* _RTE_DPAA2_SEC_PMD_PRIVATE_H_ */