linux/include/linux/ccp.h
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   1/*
   2 * AMD Cryptographic Coprocessor (CCP) driver
   3 *
   4 * Copyright (C) 2013,2017 Advanced Micro Devices, Inc.
   5 *
   6 * Author: Tom Lendacky <thomas.lendacky@amd.com>
   7 * Author: Gary R Hook <gary.hook@amd.com>
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License version 2 as
  11 * published by the Free Software Foundation.
  12 */
  13
  14#ifndef __CCP_H__
  15#define __CCP_H__
  16
  17#include <linux/scatterlist.h>
  18#include <linux/workqueue.h>
  19#include <linux/list.h>
  20#include <crypto/aes.h>
  21#include <crypto/sha.h>
  22
  23struct ccp_device;
  24struct ccp_cmd;
  25
  26#if defined(CONFIG_CRYPTO_DEV_SP_CCP)
  27
  28/**
  29 * ccp_present - check if a CCP device is present
  30 *
  31 * Returns zero if a CCP device is present, -ENODEV otherwise.
  32 */
  33int ccp_present(void);
  34
  35#define CCP_VSIZE 16
  36#define CCP_VMASK               ((unsigned int)((1 << CCP_VSIZE) - 1))
  37#define CCP_VERSION(v, r)       ((unsigned int)((v << CCP_VSIZE) \
  38                                               | (r & CCP_VMASK)))
  39
  40/**
  41 * ccp_version - get the version of the CCP
  42 *
  43 * Returns a positive version number, or zero if no CCP
  44 */
  45unsigned int ccp_version(void);
  46
  47/**
  48 * ccp_enqueue_cmd - queue an operation for processing by the CCP
  49 *
  50 * @cmd: ccp_cmd struct to be processed
  51 *
  52 * Refer to the ccp_cmd struct below for required fields.
  53 *
  54 * Queue a cmd to be processed by the CCP. If queueing the cmd
  55 * would exceed the defined length of the cmd queue the cmd will
  56 * only be queued if the CCP_CMD_MAY_BACKLOG flag is set and will
  57 * result in a return code of -EBUSY.
  58 *
  59 * The callback routine specified in the ccp_cmd struct will be
  60 * called to notify the caller of completion (if the cmd was not
  61 * backlogged) or advancement out of the backlog. If the cmd has
  62 * advanced out of the backlog the "err" value of the callback
  63 * will be -EINPROGRESS. Any other "err" value during callback is
  64 * the result of the operation.
  65 *
  66 * The cmd has been successfully queued if:
  67 *   the return code is -EINPROGRESS or
  68 *   the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set
  69 */
  70int ccp_enqueue_cmd(struct ccp_cmd *cmd);
  71
  72#else /* CONFIG_CRYPTO_DEV_CCP_SP_DEV is not enabled */
  73
  74static inline int ccp_present(void)
  75{
  76        return -ENODEV;
  77}
  78
  79static inline unsigned int ccp_version(void)
  80{
  81        return 0;
  82}
  83
  84static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd)
  85{
  86        return -ENODEV;
  87}
  88
  89#endif /* CONFIG_CRYPTO_DEV_SP_CCP */
  90
  91
  92/***** AES engine *****/
  93/**
  94 * ccp_aes_type - AES key size
  95 *
  96 * @CCP_AES_TYPE_128: 128-bit key
  97 * @CCP_AES_TYPE_192: 192-bit key
  98 * @CCP_AES_TYPE_256: 256-bit key
  99 */
 100enum ccp_aes_type {
 101        CCP_AES_TYPE_128 = 0,
 102        CCP_AES_TYPE_192,
 103        CCP_AES_TYPE_256,
 104        CCP_AES_TYPE__LAST,
 105};
 106
 107/**
 108 * ccp_aes_mode - AES operation mode
 109 *
 110 * @CCP_AES_MODE_ECB: ECB mode
 111 * @CCP_AES_MODE_CBC: CBC mode
 112 * @CCP_AES_MODE_OFB: OFB mode
 113 * @CCP_AES_MODE_CFB: CFB mode
 114 * @CCP_AES_MODE_CTR: CTR mode
 115 * @CCP_AES_MODE_CMAC: CMAC mode
 116 */
 117enum ccp_aes_mode {
 118        CCP_AES_MODE_ECB = 0,
 119        CCP_AES_MODE_CBC,
 120        CCP_AES_MODE_OFB,
 121        CCP_AES_MODE_CFB,
 122        CCP_AES_MODE_CTR,
 123        CCP_AES_MODE_CMAC,
 124        CCP_AES_MODE_GHASH,
 125        CCP_AES_MODE_GCTR,
 126        CCP_AES_MODE_GCM,
 127        CCP_AES_MODE_GMAC,
 128        CCP_AES_MODE__LAST,
 129};
 130
 131/**
 132 * ccp_aes_mode - AES operation mode
 133 *
 134 * @CCP_AES_ACTION_DECRYPT: AES decrypt operation
 135 * @CCP_AES_ACTION_ENCRYPT: AES encrypt operation
 136 */
 137enum ccp_aes_action {
 138        CCP_AES_ACTION_DECRYPT = 0,
 139        CCP_AES_ACTION_ENCRYPT,
 140        CCP_AES_ACTION__LAST,
 141};
 142/* Overloaded field */
 143#define CCP_AES_GHASHAAD        CCP_AES_ACTION_DECRYPT
 144#define CCP_AES_GHASHFINAL      CCP_AES_ACTION_ENCRYPT
 145
 146/**
 147 * struct ccp_aes_engine - CCP AES operation
 148 * @type: AES operation key size
 149 * @mode: AES operation mode
 150 * @action: AES operation (decrypt/encrypt)
 151 * @key: key to be used for this AES operation
 152 * @key_len: length in bytes of key
 153 * @iv: IV to be used for this AES operation
 154 * @iv_len: length in bytes of iv
 155 * @src: data to be used for this operation
 156 * @dst: data produced by this operation
 157 * @src_len: length in bytes of data used for this operation
 158 * @cmac_final: indicates final operation when running in CMAC mode
 159 * @cmac_key: K1/K2 key used in final CMAC operation
 160 * @cmac_key_len: length in bytes of cmac_key
 161 *
 162 * Variables required to be set when calling ccp_enqueue_cmd():
 163 *   - type, mode, action, key, key_len, src, dst, src_len
 164 *   - iv, iv_len for any mode other than ECB
 165 *   - cmac_final for CMAC mode
 166 *   - cmac_key, cmac_key_len for CMAC mode if cmac_final is non-zero
 167 *
 168 * The iv variable is used as both input and output. On completion of the
 169 * AES operation the new IV overwrites the old IV.
 170 */
 171struct ccp_aes_engine {
 172        enum ccp_aes_type type;
 173        enum ccp_aes_mode mode;
 174        enum ccp_aes_action action;
 175
 176        struct scatterlist *key;
 177        u32 key_len;            /* In bytes */
 178
 179        struct scatterlist *iv;
 180        u32 iv_len;             /* In bytes */
 181
 182        struct scatterlist *src, *dst;
 183        u64 src_len;            /* In bytes */
 184
 185        u32 cmac_final;         /* Indicates final cmac cmd */
 186        struct scatterlist *cmac_key;   /* K1/K2 cmac key required for
 187                                         * final cmac cmd */
 188        u32 cmac_key_len;       /* In bytes */
 189
 190        u32 aad_len;            /* In bytes */
 191};
 192
 193/***** XTS-AES engine *****/
 194/**
 195 * ccp_xts_aes_unit_size - XTS unit size
 196 *
 197 * @CCP_XTS_AES_UNIT_SIZE_16: Unit size of 16 bytes
 198 * @CCP_XTS_AES_UNIT_SIZE_512: Unit size of 512 bytes
 199 * @CCP_XTS_AES_UNIT_SIZE_1024: Unit size of 1024 bytes
 200 * @CCP_XTS_AES_UNIT_SIZE_2048: Unit size of 2048 bytes
 201 * @CCP_XTS_AES_UNIT_SIZE_4096: Unit size of 4096 bytes
 202 */
 203enum ccp_xts_aes_unit_size {
 204        CCP_XTS_AES_UNIT_SIZE_16 = 0,
 205        CCP_XTS_AES_UNIT_SIZE_512,
 206        CCP_XTS_AES_UNIT_SIZE_1024,
 207        CCP_XTS_AES_UNIT_SIZE_2048,
 208        CCP_XTS_AES_UNIT_SIZE_4096,
 209        CCP_XTS_AES_UNIT_SIZE__LAST,
 210};
 211
 212/**
 213 * struct ccp_xts_aes_engine - CCP XTS AES operation
 214 * @action: AES operation (decrypt/encrypt)
 215 * @unit_size: unit size of the XTS operation
 216 * @key: key to be used for this XTS AES operation
 217 * @key_len: length in bytes of key
 218 * @iv: IV to be used for this XTS AES operation
 219 * @iv_len: length in bytes of iv
 220 * @src: data to be used for this operation
 221 * @dst: data produced by this operation
 222 * @src_len: length in bytes of data used for this operation
 223 * @final: indicates final XTS operation
 224 *
 225 * Variables required to be set when calling ccp_enqueue_cmd():
 226 *   - action, unit_size, key, key_len, iv, iv_len, src, dst, src_len, final
 227 *
 228 * The iv variable is used as both input and output. On completion of the
 229 * AES operation the new IV overwrites the old IV.
 230 */
 231struct ccp_xts_aes_engine {
 232        enum ccp_aes_type type;
 233        enum ccp_aes_action action;
 234        enum ccp_xts_aes_unit_size unit_size;
 235
 236        struct scatterlist *key;
 237        u32 key_len;            /* In bytes */
 238
 239        struct scatterlist *iv;
 240        u32 iv_len;             /* In bytes */
 241
 242        struct scatterlist *src, *dst;
 243        u64 src_len;            /* In bytes */
 244
 245        u32 final;
 246};
 247
 248/***** SHA engine *****/
 249/**
 250 * ccp_sha_type - type of SHA operation
 251 *
 252 * @CCP_SHA_TYPE_1: SHA-1 operation
 253 * @CCP_SHA_TYPE_224: SHA-224 operation
 254 * @CCP_SHA_TYPE_256: SHA-256 operation
 255 */
 256enum ccp_sha_type {
 257        CCP_SHA_TYPE_1 = 1,
 258        CCP_SHA_TYPE_224,
 259        CCP_SHA_TYPE_256,
 260        CCP_SHA_TYPE_384,
 261        CCP_SHA_TYPE_512,
 262        CCP_SHA_TYPE__LAST,
 263};
 264
 265/**
 266 * struct ccp_sha_engine - CCP SHA operation
 267 * @type: Type of SHA operation
 268 * @ctx: current hash value
 269 * @ctx_len: length in bytes of hash value
 270 * @src: data to be used for this operation
 271 * @src_len: length in bytes of data used for this operation
 272 * @opad: data to be used for final HMAC operation
 273 * @opad_len: length in bytes of data used for final HMAC operation
 274 * @first: indicates first SHA operation
 275 * @final: indicates final SHA operation
 276 * @msg_bits: total length of the message in bits used in final SHA operation
 277 *
 278 * Variables required to be set when calling ccp_enqueue_cmd():
 279 *   - type, ctx, ctx_len, src, src_len, final
 280 *   - msg_bits if final is non-zero
 281 *
 282 * The ctx variable is used as both input and output. On completion of the
 283 * SHA operation the new hash value overwrites the old hash value.
 284 */
 285struct ccp_sha_engine {
 286        enum ccp_sha_type type;
 287
 288        struct scatterlist *ctx;
 289        u32 ctx_len;            /* In bytes */
 290
 291        struct scatterlist *src;
 292        u64 src_len;            /* In bytes */
 293
 294        struct scatterlist *opad;
 295        u32 opad_len;           /* In bytes */
 296
 297        u32 first;              /* Indicates first sha cmd */
 298        u32 final;              /* Indicates final sha cmd */
 299        u64 msg_bits;           /* Message length in bits required for
 300                                 * final sha cmd */
 301};
 302
 303/***** 3DES engine *****/
 304enum ccp_des3_mode {
 305        CCP_DES3_MODE_ECB = 0,
 306        CCP_DES3_MODE_CBC,
 307        CCP_DES3_MODE_CFB,
 308        CCP_DES3_MODE__LAST,
 309};
 310
 311enum ccp_des3_type {
 312        CCP_DES3_TYPE_168 = 1,
 313        CCP_DES3_TYPE__LAST,
 314        };
 315
 316enum ccp_des3_action {
 317        CCP_DES3_ACTION_DECRYPT = 0,
 318        CCP_DES3_ACTION_ENCRYPT,
 319        CCP_DES3_ACTION__LAST,
 320};
 321
 322/**
 323 * struct ccp_des3_engine - CCP SHA operation
 324 * @type: Type of 3DES operation
 325 * @mode: cipher mode
 326 * @action: 3DES operation (decrypt/encrypt)
 327 * @key: key to be used for this 3DES operation
 328 * @key_len: length of key (in bytes)
 329 * @iv: IV to be used for this AES operation
 330 * @iv_len: length in bytes of iv
 331 * @src: input data to be used for this operation
 332 * @src_len: length of input data used for this operation (in bytes)
 333 * @dst: output data produced by this operation
 334 *
 335 * Variables required to be set when calling ccp_enqueue_cmd():
 336 *   - type, mode, action, key, key_len, src, dst, src_len
 337 *   - iv, iv_len for any mode other than ECB
 338 *
 339 * The iv variable is used as both input and output. On completion of the
 340 * 3DES operation the new IV overwrites the old IV.
 341 */
 342struct ccp_des3_engine {
 343        enum ccp_des3_type type;
 344        enum ccp_des3_mode mode;
 345        enum ccp_des3_action action;
 346
 347        struct scatterlist *key;
 348        u32 key_len;        /* In bytes */
 349
 350        struct scatterlist *iv;
 351        u32 iv_len;          /* In bytes */
 352
 353        struct scatterlist *src, *dst;
 354        u64 src_len;        /* In bytes */
 355};
 356
 357/***** RSA engine *****/
 358/**
 359 * struct ccp_rsa_engine - CCP RSA operation
 360 * @key_size: length in bits of RSA key
 361 * @exp: RSA exponent
 362 * @exp_len: length in bytes of exponent
 363 * @mod: RSA modulus
 364 * @mod_len: length in bytes of modulus
 365 * @src: data to be used for this operation
 366 * @dst: data produced by this operation
 367 * @src_len: length in bytes of data used for this operation
 368 *
 369 * Variables required to be set when calling ccp_enqueue_cmd():
 370 *   - key_size, exp, exp_len, mod, mod_len, src, dst, src_len
 371 */
 372struct ccp_rsa_engine {
 373        u32 key_size;           /* In bits */
 374
 375        struct scatterlist *exp;
 376        u32 exp_len;            /* In bytes */
 377
 378        struct scatterlist *mod;
 379        u32 mod_len;            /* In bytes */
 380
 381        struct scatterlist *src, *dst;
 382        u32 src_len;            /* In bytes */
 383};
 384
 385/***** Passthru engine *****/
 386/**
 387 * ccp_passthru_bitwise - type of bitwise passthru operation
 388 *
 389 * @CCP_PASSTHRU_BITWISE_NOOP: no bitwise operation performed
 390 * @CCP_PASSTHRU_BITWISE_AND: perform bitwise AND of src with mask
 391 * @CCP_PASSTHRU_BITWISE_OR: perform bitwise OR of src with mask
 392 * @CCP_PASSTHRU_BITWISE_XOR: perform bitwise XOR of src with mask
 393 * @CCP_PASSTHRU_BITWISE_MASK: overwrite with mask
 394 */
 395enum ccp_passthru_bitwise {
 396        CCP_PASSTHRU_BITWISE_NOOP = 0,
 397        CCP_PASSTHRU_BITWISE_AND,
 398        CCP_PASSTHRU_BITWISE_OR,
 399        CCP_PASSTHRU_BITWISE_XOR,
 400        CCP_PASSTHRU_BITWISE_MASK,
 401        CCP_PASSTHRU_BITWISE__LAST,
 402};
 403
 404/**
 405 * ccp_passthru_byteswap - type of byteswap passthru operation
 406 *
 407 * @CCP_PASSTHRU_BYTESWAP_NOOP: no byte swapping performed
 408 * @CCP_PASSTHRU_BYTESWAP_32BIT: swap bytes within 32-bit words
 409 * @CCP_PASSTHRU_BYTESWAP_256BIT: swap bytes within 256-bit words
 410 */
 411enum ccp_passthru_byteswap {
 412        CCP_PASSTHRU_BYTESWAP_NOOP = 0,
 413        CCP_PASSTHRU_BYTESWAP_32BIT,
 414        CCP_PASSTHRU_BYTESWAP_256BIT,
 415        CCP_PASSTHRU_BYTESWAP__LAST,
 416};
 417
 418/**
 419 * struct ccp_passthru_engine - CCP pass-through operation
 420 * @bit_mod: bitwise operation to perform
 421 * @byte_swap: byteswap operation to perform
 422 * @mask: mask to be applied to data
 423 * @mask_len: length in bytes of mask
 424 * @src: data to be used for this operation
 425 * @dst: data produced by this operation
 426 * @src_len: length in bytes of data used for this operation
 427 * @final: indicate final pass-through operation
 428 *
 429 * Variables required to be set when calling ccp_enqueue_cmd():
 430 *   - bit_mod, byte_swap, src, dst, src_len
 431 *   - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP
 432 */
 433struct ccp_passthru_engine {
 434        enum ccp_passthru_bitwise bit_mod;
 435        enum ccp_passthru_byteswap byte_swap;
 436
 437        struct scatterlist *mask;
 438        u32 mask_len;           /* In bytes */
 439
 440        struct scatterlist *src, *dst;
 441        u64 src_len;            /* In bytes */
 442
 443        u32 final;
 444};
 445
 446/**
 447 * struct ccp_passthru_nomap_engine - CCP pass-through operation
 448 *   without performing DMA mapping
 449 * @bit_mod: bitwise operation to perform
 450 * @byte_swap: byteswap operation to perform
 451 * @mask: mask to be applied to data
 452 * @mask_len: length in bytes of mask
 453 * @src: data to be used for this operation
 454 * @dst: data produced by this operation
 455 * @src_len: length in bytes of data used for this operation
 456 * @final: indicate final pass-through operation
 457 *
 458 * Variables required to be set when calling ccp_enqueue_cmd():
 459 *   - bit_mod, byte_swap, src, dst, src_len
 460 *   - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP
 461 */
 462struct ccp_passthru_nomap_engine {
 463        enum ccp_passthru_bitwise bit_mod;
 464        enum ccp_passthru_byteswap byte_swap;
 465
 466        dma_addr_t mask;
 467        u32 mask_len;           /* In bytes */
 468
 469        dma_addr_t src_dma, dst_dma;
 470        u64 src_len;            /* In bytes */
 471
 472        u32 final;
 473};
 474
 475/***** ECC engine *****/
 476#define CCP_ECC_MODULUS_BYTES   48      /* 384-bits */
 477#define CCP_ECC_MAX_OPERANDS    6
 478#define CCP_ECC_MAX_OUTPUTS     3
 479
 480/**
 481 * ccp_ecc_function - type of ECC function
 482 *
 483 * @CCP_ECC_FUNCTION_MMUL_384BIT: 384-bit modular multiplication
 484 * @CCP_ECC_FUNCTION_MADD_384BIT: 384-bit modular addition
 485 * @CCP_ECC_FUNCTION_MINV_384BIT: 384-bit multiplicative inverse
 486 * @CCP_ECC_FUNCTION_PADD_384BIT: 384-bit point addition
 487 * @CCP_ECC_FUNCTION_PMUL_384BIT: 384-bit point multiplication
 488 * @CCP_ECC_FUNCTION_PDBL_384BIT: 384-bit point doubling
 489 */
 490enum ccp_ecc_function {
 491        CCP_ECC_FUNCTION_MMUL_384BIT = 0,
 492        CCP_ECC_FUNCTION_MADD_384BIT,
 493        CCP_ECC_FUNCTION_MINV_384BIT,
 494        CCP_ECC_FUNCTION_PADD_384BIT,
 495        CCP_ECC_FUNCTION_PMUL_384BIT,
 496        CCP_ECC_FUNCTION_PDBL_384BIT,
 497};
 498
 499/**
 500 * struct ccp_ecc_modular_math - CCP ECC modular math parameters
 501 * @operand_1: first operand for the modular math operation
 502 * @operand_1_len: length of the first operand
 503 * @operand_2: second operand for the modular math operation
 504 *             (not used for CCP_ECC_FUNCTION_MINV_384BIT)
 505 * @operand_2_len: length of the second operand
 506 *             (not used for CCP_ECC_FUNCTION_MINV_384BIT)
 507 * @result: result of the modular math operation
 508 * @result_len: length of the supplied result buffer
 509 */
 510struct ccp_ecc_modular_math {
 511        struct scatterlist *operand_1;
 512        unsigned int operand_1_len;     /* In bytes */
 513
 514        struct scatterlist *operand_2;
 515        unsigned int operand_2_len;     /* In bytes */
 516
 517        struct scatterlist *result;
 518        unsigned int result_len;        /* In bytes */
 519};
 520
 521/**
 522 * struct ccp_ecc_point - CCP ECC point definition
 523 * @x: the x coordinate of the ECC point
 524 * @x_len: the length of the x coordinate
 525 * @y: the y coordinate of the ECC point
 526 * @y_len: the length of the y coordinate
 527 */
 528struct ccp_ecc_point {
 529        struct scatterlist *x;
 530        unsigned int x_len;     /* In bytes */
 531
 532        struct scatterlist *y;
 533        unsigned int y_len;     /* In bytes */
 534};
 535
 536/**
 537 * struct ccp_ecc_point_math - CCP ECC point math parameters
 538 * @point_1: the first point of the ECC point math operation
 539 * @point_2: the second point of the ECC point math operation
 540 *           (only used for CCP_ECC_FUNCTION_PADD_384BIT)
 541 * @domain_a: the a parameter of the ECC curve
 542 * @domain_a_len: the length of the a parameter
 543 * @scalar: the scalar parameter for the point match operation
 544 *          (only used for CCP_ECC_FUNCTION_PMUL_384BIT)
 545 * @scalar_len: the length of the scalar parameter
 546 *              (only used for CCP_ECC_FUNCTION_PMUL_384BIT)
 547 * @result: the point resulting from the point math operation
 548 */
 549struct ccp_ecc_point_math {
 550        struct ccp_ecc_point point_1;
 551        struct ccp_ecc_point point_2;
 552
 553        struct scatterlist *domain_a;
 554        unsigned int domain_a_len;      /* In bytes */
 555
 556        struct scatterlist *scalar;
 557        unsigned int scalar_len;        /* In bytes */
 558
 559        struct ccp_ecc_point result;
 560};
 561
 562/**
 563 * struct ccp_ecc_engine - CCP ECC operation
 564 * @function: ECC function to perform
 565 * @mod: ECC modulus
 566 * @mod_len: length in bytes of modulus
 567 * @mm: module math parameters
 568 * @pm: point math parameters
 569 * @ecc_result: result of the ECC operation
 570 *
 571 * Variables required to be set when calling ccp_enqueue_cmd():
 572 *   - function, mod, mod_len
 573 *   - operand, operand_len, operand_count, output, output_len, output_count
 574 *   - ecc_result
 575 */
 576struct ccp_ecc_engine {
 577        enum ccp_ecc_function function;
 578
 579        struct scatterlist *mod;
 580        u32 mod_len;            /* In bytes */
 581
 582        union {
 583                struct ccp_ecc_modular_math mm;
 584                struct ccp_ecc_point_math pm;
 585        } u;
 586
 587        u16 ecc_result;
 588};
 589
 590
 591/**
 592 * ccp_engine - CCP operation identifiers
 593 *
 594 * @CCP_ENGINE_AES: AES operation
 595 * @CCP_ENGINE_XTS_AES: 128-bit XTS AES operation
 596 * @CCP_ENGINE_RSVD1: unused
 597 * @CCP_ENGINE_SHA: SHA operation
 598 * @CCP_ENGINE_RSA: RSA operation
 599 * @CCP_ENGINE_PASSTHRU: pass-through operation
 600 * @CCP_ENGINE_ZLIB_DECOMPRESS: unused
 601 * @CCP_ENGINE_ECC: ECC operation
 602 */
 603enum ccp_engine {
 604        CCP_ENGINE_AES = 0,
 605        CCP_ENGINE_XTS_AES_128,
 606        CCP_ENGINE_DES3,
 607        CCP_ENGINE_SHA,
 608        CCP_ENGINE_RSA,
 609        CCP_ENGINE_PASSTHRU,
 610        CCP_ENGINE_ZLIB_DECOMPRESS,
 611        CCP_ENGINE_ECC,
 612        CCP_ENGINE__LAST,
 613};
 614
 615/* Flag values for flags member of ccp_cmd */
 616#define CCP_CMD_MAY_BACKLOG             0x00000001
 617#define CCP_CMD_PASSTHRU_NO_DMA_MAP     0x00000002
 618
 619/**
 620 * struct ccp_cmd - CCP operation request
 621 * @entry: list element (ccp driver use only)
 622 * @work: work element used for callbacks (ccp driver use only)
 623 * @ccp: CCP device to be run on
 624 * @ret: operation return code (ccp driver use only)
 625 * @flags: cmd processing flags
 626 * @engine: CCP operation to perform
 627 * @engine_error: CCP engine return code
 628 * @u: engine specific structures, refer to specific engine struct below
 629 * @callback: operation completion callback function
 630 * @data: parameter value to be supplied to the callback function
 631 *
 632 * Variables required to be set when calling ccp_enqueue_cmd():
 633 *   - engine, callback
 634 *   - See the operation structures below for what is required for each
 635 *     operation.
 636 */
 637struct ccp_cmd {
 638        /* The list_head, work_struct, ccp and ret variables are for use
 639         * by the CCP driver only.
 640         */
 641        struct list_head entry;
 642        struct work_struct work;
 643        struct ccp_device *ccp;
 644        int ret;
 645
 646        u32 flags;
 647
 648        enum ccp_engine engine;
 649        u32 engine_error;
 650
 651        union {
 652                struct ccp_aes_engine aes;
 653                struct ccp_xts_aes_engine xts;
 654                struct ccp_des3_engine des3;
 655                struct ccp_sha_engine sha;
 656                struct ccp_rsa_engine rsa;
 657                struct ccp_passthru_engine passthru;
 658                struct ccp_passthru_nomap_engine passthru_nomap;
 659                struct ccp_ecc_engine ecc;
 660        } u;
 661
 662        /* Completion callback support */
 663        void (*callback)(void *data, int err);
 664        void *data;
 665};
 666
 667#endif
 668