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_IPv6_DEFAULT_VTC_FLOW     0x60000000
  45
  46 #define DPAA2_SET_FLC_EWS(flc)  (flc->word1_bits23_16 |= 0x1)
  47 #define DPAA2_SET_FLC_RSC(flc)  (flc->word1_bits31_24 |= 0x1)
  48 #define DPAA2_SET_FLC_REUSE_BS(flc) (flc->mode_bits |= 0x8000)
  49 #define DPAA2_SET_FLC_REUSE_FF(flc) (flc->mode_bits |= 0x2000)
  50
  51 /* SEC Flow Context Descriptor */
  52 struct sec_flow_context {
  53         /* word 0 */
  54         uint16_t word0_sdid;            /* 11-0  SDID */
  55         uint16_t word0_res;             /* 31-12 reserved */
  56
  57         /* word 1 */
  58         uint8_t word1_sdl;              /* 5-0 SDL */
  59                                         /* 7-6 reserved */
  60
  61         uint8_t word1_bits_15_8;        /* 11-8 CRID */
  62                                         /* 14-12 reserved */
  63                                         /* 15 CRJD */
  64
  65         uint8_t word1_bits23_16;        /* 16  EWS */
  66                                         /* 17 DAC */
  67                                         /* 18,19,20 ? */
  68                                         /* 23-21 reserved */
  69
  70         uint8_t word1_bits31_24;        /* 24 RSC */
  71                                         /* 25 RBMT */
  72                                         /* 31-26 reserved */
  73
  74         /* word 2  RFLC[31-0] */
  75         uint32_t word2_rflc_31_0;
  76
  77         /* word 3  RFLC[63-32] */
  78         uint32_t word3_rflc_63_32;
  79
  80         /* word 4 */
  81         uint16_t word4_iicid;           /* 15-0  IICID */
  82         uint16_t word4_oicid;           /* 31-16 OICID */
  83
  84         /* word 5 */
  85         uint32_t word5_ofqid:24;                /* 23-0 OFQID */
  86         uint32_t word5_31_24:8;
  87                                         /* 24 OSC */
  88                                         /* 25 OBMT */
  89                                         /* 29-26 reserved */
  90                                         /* 31-30 ICR */
  91
  92         /* word 6 */
  93         uint32_t word6_oflc_31_0;
  94
  95         /* word 7 */
  96         uint32_t word7_oflc_63_32;
  97
  98         /* Word 8-15 storage profiles */
  99         uint16_t dl;                    /**<  DataLength(correction) */
 100         uint16_t reserved;              /**< reserved */
 101         uint16_t dhr;                   /**< DataHeadRoom(correction) */
 102         uint16_t mode_bits;             /**< mode bits */
 103         uint16_t bpv0;                  /**< buffer pool0 valid */
 104         uint16_t bpid0;                 /**< Bypass Memory Translation */
 105         uint16_t bpv1;                  /**< buffer pool1 valid */
 106         uint16_t bpid1;                 /**< Bypass Memory Translation */
 107         uint64_t word_12_15[2];         /**< word 12-15 are reserved */
 108 };
 109
 110 struct sec_flc_desc {
 111         struct sec_flow_context flc;
 112         uint32_t desc[MAX_DESC_SIZE];
 113 };
 114
 115 struct ctxt_priv {
 116         struct rte_mempool *fle_pool; /* per device memory pool for FLE */
 117         struct sec_flc_desc flc_desc[0];
 118 };
 119
 120 enum dpaa2_sec_op_type {
 121         DPAA2_SEC_NONE,  /*!< No Cipher operations*/
 122         DPAA2_SEC_CIPHER,/*!< CIPHER operations */
 123         DPAA2_SEC_AUTH,  /*!< Authentication Operations */
 124         DPAA2_SEC_AEAD,  /*!< AEAD (AES-GCM/CCM) type operations */
 125         DPAA2_SEC_CIPHER_HASH,  /*!< Authenticated Encryption with
 126                                  * associated data
 127                                  */
 128         DPAA2_SEC_HASH_CIPHER,  /*!< Encryption with Authenticated
 129                                  * associated data
 130                                  */
 131         DPAA2_SEC_IPSEC, /*!< IPSEC protocol operations*/
 132         DPAA2_SEC_PDCP,  /*!< PDCP protocol operations*/
 133         DPAA2_SEC_PKC,   /*!< Public Key Cryptographic Operations */
 134         DPAA2_SEC_MAX
 135 };
 136
 137 struct dpaa2_sec_aead_ctxt {
 138         uint16_t auth_only_len; /*!< Length of data for Auth only */
 139         uint8_t auth_cipher_text;       /**< Authenticate/cipher ordering */
 140 };
 141
 142 /*
 143  * The structure is to be filled by user for PDCP Protocol
 144  */
 145 struct dpaa2_pdcp_ctxt {
 146         enum rte_security_pdcp_domain domain; /*!< Data/Control mode*/
 147         int8_t bearer;  /*!< PDCP bearer ID */
 148         int8_t pkt_dir;/*!< PDCP Frame Direction 0:UL 1:DL*/
 149         int8_t hfn_ovd;/*!< Overwrite HFN per packet*/
 150         uint32_t hfn;   /*!< Hyper Frame Number */
 151         uint32_t hfn_threshold; /*!< HFN Threashold for key renegotiation */
 152         uint8_t sn_size;        /*!< Sequence number size, 7/12/15 */
 153 };
 154
 155 typedef struct dpaa2_sec_session_entry {
 156         void *ctxt;
 157         uint8_t ctxt_type;
 158         uint8_t dir;         /*!< Operation Direction */
 159         enum rte_crypto_cipher_algorithm cipher_alg; /*!< Cipher Algorithm*/
 160         enum rte_crypto_auth_algorithm auth_alg; /*!< Authentication Algorithm*/
 161         enum rte_crypto_aead_algorithm aead_alg; /*!< AEAD Algorithm*/
 162         union {
 163                 struct {
 164                         uint8_t *data;  /**< pointer to key data */
 165                         size_t length;  /**< key length in bytes */
 166                 } aead_key;
 167                 struct {
 168                         struct {
 169                                 uint8_t *data;  /**< pointer to key data */
 170                                 size_t length;  /**< key length in bytes */
 171                         } cipher_key;
 172                         struct {
 173                                 uint8_t *data;  /**< pointer to key data */
 174                                 size_t length;  /**< key length in bytes */
 175                         } auth_key;
 176                 };
 177         };
 178         union {
 179                 struct {
 180                         struct {
 181                                 uint16_t length; /**< IV length in bytes */
 182                                 uint16_t offset; /**< IV offset in bytes */
 183                         } iv;
 184                         uint16_t digest_length;
 185                         uint8_t status;
 186                         union {
 187                                 struct dpaa2_sec_aead_ctxt aead_ctxt;
 188                         } ext_params;
 189                 };
 190                 struct dpaa2_pdcp_ctxt pdcp;
 191         };
 192 } dpaa2_sec_session;
 193
 194 static const struct rte_cryptodev_capabilities dpaa2_sec_capabilities[] = {
 195         {       /* MD5 HMAC */
 196                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 197                 {.sym = {
 198                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 199                         {.auth = {
 200                                 .algo = RTE_CRYPTO_AUTH_MD5_HMAC,
 201                                 .block_size = 64,
 202                                 .key_size = {
 203                                         .min = 1,
 204                                         .max = 64,
 205                                         .increment = 1
 206                                 },
 207                                 .digest_size = {
 208                                         .min = 1,
 209                                         .max = 16,
 210                                         .increment = 1
 211                                 },
 212                                 .iv_size = { 0 }
 213                         }, }
 214                 }, }
 215         },
 216         {       /* SHA1 HMAC */
 217                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 218                 {.sym = {
 219                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 220                         {.auth = {
 221                                 .algo = RTE_CRYPTO_AUTH_SHA1_HMAC,
 222                                 .block_size = 64,
 223                                 .key_size = {
 224                                         .min = 1,
 225                                         .max = 64,
 226                                         .increment = 1
 227                                 },
 228                                 .digest_size = {
 229                                         .min = 1,
 230                                         .max = 20,
 231                                         .increment = 1
 232                                 },
 233                                 .iv_size = { 0 }
 234                         }, }
 235                 }, }
 236         },
 237         {       /* SHA224 HMAC */
 238                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 239                 {.sym = {
 240                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 241                         {.auth = {
 242                                 .algo = RTE_CRYPTO_AUTH_SHA224_HMAC,
 243                                 .block_size = 64,
 244                                 .key_size = {
 245                                         .min = 1,
 246                                         .max = 64,
 247                                         .increment = 1
 248                                 },
 249                                 .digest_size = {
 250                                         .min = 1,
 251                                         .max = 28,
 252                                         .increment = 1
 253                                 },
 254                                 .iv_size = { 0 }
 255                         }, }
 256                 }, }
 257         },
 258         {       /* SHA256 HMAC */
 259                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 260                 {.sym = {
 261                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 262                         {.auth = {
 263                                 .algo = RTE_CRYPTO_AUTH_SHA256_HMAC,
 264                                 .block_size = 64,
 265                                 .key_size = {
 266                                         .min = 1,
 267                                         .max = 64,
 268                                         .increment = 1
 269                                 },
 270                                 .digest_size = {
 271                                         .min = 1,
 272                                         .max = 32,
 273                                         .increment = 1
 274                                 },
 275                                 .iv_size = { 0 }
 276                                 }, }
 277                         }, }
 278                 },
 279         {       /* SHA384 HMAC */
 280                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 281                 {.sym = {
 282                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 283                         {.auth = {
 284                                 .algo = RTE_CRYPTO_AUTH_SHA384_HMAC,
 285                                 .block_size = 128,
 286                                 .key_size = {
 287                                         .min = 1,
 288                                         .max = 128,
 289                                         .increment = 1
 290                                 },
 291                                 .digest_size = {
 292                                         .min = 1,
 293                                         .max = 48,
 294                                         .increment = 1
 295                                 },
 296                                 .iv_size = { 0 }
 297                         }, }
 298                 }, }
 299         },
 300         {       /* SHA512 HMAC */
 301                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 302                 {.sym = {
 303                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 304                         {.auth = {
 305                                 .algo = RTE_CRYPTO_AUTH_SHA512_HMAC,
 306                                 .block_size = 128,
 307                                 .key_size = {
 308                                         .min = 1,
 309                                         .max = 128,
 310                                         .increment = 1
 311                                 },
 312                                 .digest_size = {
 313                                         .min = 1,
 314                                         .max = 64,
 315                                         .increment = 1
 316                                 },
 317                                 .iv_size = { 0 }
 318                         }, }
 319                 }, }
 320         },
 321         {       /* AES GCM */
 322                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 323                 {.sym = {
 324                         .xform_type = RTE_CRYPTO_SYM_XFORM_AEAD,
 325                         {.aead = {
 326                                 .algo = RTE_CRYPTO_AEAD_AES_GCM,
 327                                 .block_size = 16,
 328                                 .key_size = {
 329                                         .min = 16,
 330                                         .max = 32,
 331                                         .increment = 8
 332                                 },
 333                                 .digest_size = {
 334                                         .min = 8,
 335                                         .max = 16,
 336                                         .increment = 4
 337                                 },
 338                                 .aad_size = {
 339                                         .min = 0,
 340                                         .max = 240,
 341                                         .increment = 1
 342                                 },
 343                                 .iv_size = {
 344                                         .min = 12,
 345                                         .max = 12,
 346                                         .increment = 0
 347                                 },
 348                         }, }
 349                 }, }
 350         },
 351         {       /* AES CBC */
 352                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 353                 {.sym = {
 354                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 355                         {.cipher = {
 356                                 .algo = RTE_CRYPTO_CIPHER_AES_CBC,
 357                                 .block_size = 16,
 358                                 .key_size = {
 359                                         .min = 16,
 360                                         .max = 32,
 361                                         .increment = 8
 362                                 },
 363                                 .iv_size = {
 364                                         .min = 16,
 365                                         .max = 16,
 366                                         .increment = 0
 367                                 }
 368                         }, }
 369                 }, }
 370         },
 371         {       /* AES CTR */
 372                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 373                 {.sym = {
 374                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 375                         {.cipher = {
 376                                 .algo = RTE_CRYPTO_CIPHER_AES_CTR,
 377                                 .block_size = 16,
 378                                 .key_size = {
 379                                         .min = 16,
 380                                         .max = 32,
 381                                         .increment = 8
 382                                 },
 383                                 .iv_size = {
 384                                         .min = 16,
 385                                         .max = 16,
 386                                         .increment = 0
 387                                 },
 388                         }, }
 389                 }, }
 390         },
 391         {       /* 3DES CBC */
 392                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 393                 {.sym = {
 394                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 395                         {.cipher = {
 396                                 .algo = RTE_CRYPTO_CIPHER_3DES_CBC,
 397                                 .block_size = 8,
 398                                 .key_size = {
 399                                         .min = 16,
 400                                         .max = 24,
 401                                         .increment = 8
 402                                 },
 403                                 .iv_size = {
 404                                         .min = 8,
 405                                         .max = 8,
 406                                         .increment = 0
 407                                 }
 408                         }, }
 409                 }, }
 410         },
 411
 412         RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
 413 };
 414
 415 static const struct rte_cryptodev_capabilities dpaa2_pdcp_capabilities[] = {
 416         {       /* SNOW 3G (UIA2) */
 417                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 418                 {.sym = {
 419                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 420                         {.auth = {
 421                                 .algo = RTE_CRYPTO_AUTH_SNOW3G_UIA2,
 422                                 .block_size = 16,
 423                                 .key_size = {
 424                                         .min = 16,
 425                                         .max = 16,
 426                                         .increment = 0
 427                                 },
 428                                 .digest_size = {
 429                                         .min = 4,
 430                                         .max = 4,
 431                                         .increment = 0
 432                                 },
 433                                 .iv_size = {
 434                                         .min = 16,
 435                                         .max = 16,
 436                                         .increment = 0
 437                                 }
 438                         }, }
 439                 }, }
 440         },
 441         {       /* SNOW 3G (UEA2) */
 442                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 443                 {.sym = {
 444                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 445                         {.cipher = {
 446                                 .algo = RTE_CRYPTO_CIPHER_SNOW3G_UEA2,
 447                                 .block_size = 16,
 448                                 .key_size = {
 449                                         .min = 16,
 450                                         .max = 16,
 451                                         .increment = 0
 452                                 },
 453                                 .iv_size = {
 454                                         .min = 16,
 455                                         .max = 16,
 456                                         .increment = 0
 457                                 }
 458                         }, }
 459                 }, }
 460         },
 461         {       /* AES CTR */
 462                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 463                 {.sym = {
 464                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 465                         {.cipher = {
 466                                 .algo = RTE_CRYPTO_CIPHER_AES_CTR,
 467                                 .block_size = 16,
 468                                 .key_size = {
 469                                         .min = 16,
 470                                         .max = 32,
 471                                         .increment = 8
 472                                 },
 473                                 .iv_size = {
 474                                         .min = 16,
 475                                         .max = 16,
 476                                         .increment = 0
 477                                 }
 478                         }, }
 479                 }, }
 480         },
 481         {       /* NULL (AUTH) */
 482                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 483                 {.sym = {
 484                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 485                         {.auth = {
 486                                 .algo = RTE_CRYPTO_AUTH_NULL,
 487                                 .block_size = 1,
 488                                 .key_size = {
 489                                         .min = 0,
 490                                         .max = 0,
 491                                         .increment = 0
 492                                 },
 493                                 .digest_size = {
 494                                         .min = 0,
 495                                         .max = 0,
 496                                         .increment = 0
 497                                 },
 498                                 .iv_size = { 0 }
 499                         }, },
 500                 }, },
 501         },
 502         {       /* NULL (CIPHER) */
 503                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 504                 {.sym = {
 505                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 506                         {.cipher = {
 507                                 .algo = RTE_CRYPTO_CIPHER_NULL,
 508                                 .block_size = 1,
 509                                 .key_size = {
 510                                         .min = 0,
 511                                         .max = 0,
 512                                         .increment = 0
 513                                 },
 514                                 .iv_size = {
 515                                         .min = 0,
 516                                         .max = 0,
 517                                         .increment = 0
 518                                 }
 519                         }, },
 520                 }, }
 521         },
 522         {       /* ZUC (EEA3) */
 523                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 524                 {.sym = {
 525                         .xform_type = RTE_CRYPTO_SYM_XFORM_CIPHER,
 526                         {.cipher = {
 527                                 .algo = RTE_CRYPTO_CIPHER_ZUC_EEA3,
 528                                 .block_size = 16,
 529                                 .key_size = {
 530                                         .min = 16,
 531                                         .max = 16,
 532                                         .increment = 0
 533                                 },
 534                                 .iv_size = {
 535                                         .min = 16,
 536                                         .max = 16,
 537                                         .increment = 0
 538                                 }
 539                         }, }
 540                 }, }
 541         },
 542         {       /* ZUC (EIA3) */
 543                 .op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 544                 {.sym = {
 545                         .xform_type = RTE_CRYPTO_SYM_XFORM_AUTH,
 546                         {.auth = {
 547                                 .algo = RTE_CRYPTO_AUTH_ZUC_EIA3,
 548                                 .block_size = 16,
 549                                 .key_size = {
 550                                         .min = 16,
 551                                         .max = 16,
 552                                         .increment = 0
 553                                 },
 554                                 .digest_size = {
 555                                         .min = 4,
 556                                         .max = 4,
 557                                         .increment = 0
 558                                 },
 559                                 .iv_size = {
 560                                         .min = 16,
 561                                         .max = 16,
 562                                         .increment = 0
 563                                 }
 564                         }, }
 565                 }, }
 566         },
 567
 568         RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
 569 };
 570
 571 static const struct rte_security_capability dpaa2_sec_security_cap[] = {
 572         { /* IPsec Lookaside Protocol offload ESP Transport Egress */
 573                 .action = RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL,
 574                 .protocol = RTE_SECURITY_PROTOCOL_IPSEC,
 575                 .ipsec = {
 576                         .proto = RTE_SECURITY_IPSEC_SA_PROTO_ESP,
 577                         .mode = RTE_SECURITY_IPSEC_SA_MODE_TUNNEL,
 578                         .direction = RTE_SECURITY_IPSEC_SA_DIR_EGRESS,
 579                         .options = { 0 }
 580                 },
 581                 .crypto_capabilities = dpaa2_sec_capabilities
 582         },
 583         { /* IPsec Lookaside Protocol offload ESP Tunnel Ingress */
 584                 .action = RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL,
 585                 .protocol = RTE_SECURITY_PROTOCOL_IPSEC,
 586                 .ipsec = {
 587                         .proto = RTE_SECURITY_IPSEC_SA_PROTO_ESP,
 588                         .mode = RTE_SECURITY_IPSEC_SA_MODE_TUNNEL,
 589                         .direction = RTE_SECURITY_IPSEC_SA_DIR_INGRESS,
 590                         .options = { 0 }
 591                 },
 592                 .crypto_capabilities = dpaa2_sec_capabilities
 593         },
 594         { /* PDCP Lookaside Protocol offload Data */
 595                 .action = RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL,
 596                 .protocol = RTE_SECURITY_PROTOCOL_PDCP,
 597                 .pdcp = {
 598                         .domain = RTE_SECURITY_PDCP_MODE_DATA,
 599                         .capa_flags = 0
 600                 },
 601                 .crypto_capabilities = dpaa2_pdcp_capabilities
 602         },
 603         { /* PDCP Lookaside Protocol offload Control */
 604                 .action = RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL,
 605                 .protocol = RTE_SECURITY_PROTOCOL_PDCP,
 606                 .pdcp = {
 607                         .domain = RTE_SECURITY_PDCP_MODE_CONTROL,
 608                         .capa_flags = 0
 609                 },
 610                 .crypto_capabilities = dpaa2_pdcp_capabilities
 611         },
 612         {
 613                 .action = RTE_SECURITY_ACTION_TYPE_NONE
 614         }
 615 };
 616
 617 /**
 618  * Checksum
 619  *
 620  * @param buffer calculate chksum for buffer
 621  * @param len    buffer length
 622  *
 623  * @return checksum value in host cpu order
 624  */
 625 static inline uint16_t
 626 calc_chksum(void *buffer, int len)
 627 {
 628         uint16_t *buf = (uint16_t *)buffer;
 629         uint32_t sum = 0;
 630         uint16_t result;
 631
 632         for (sum = 0; len > 1; len -= 2)
 633                 sum += *buf++;
 634
 635         if (len == 1)
 636                 sum += *(unsigned char *)buf;
 637
 638         sum = (sum >> 16) + (sum & 0xFFFF);
 639         sum += (sum >> 16);
 640         result = ~sum;
 641
 642         return  result;
 643 }
 644
 645 #endif /* _RTE_DPAA2_SEC_PMD_PRIVATE_H_ */