Tom Lendacky | 63b9450 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1 | /* |
| 2 | * AMD Cryptographic Coprocessor (CCP) driver |
| 3 | * |
| 4 | * Copyright (C) 2013 Advanced Micro Devices, Inc. |
| 5 | * |
| 6 | * Author: Tom Lendacky <thomas.lendacky@amd.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #ifndef __CPP_H__ |
| 14 | #define __CPP_H__ |
| 15 | |
| 16 | #include <linux/scatterlist.h> |
| 17 | #include <linux/workqueue.h> |
| 18 | #include <linux/list.h> |
| 19 | #include <crypto/aes.h> |
| 20 | #include <crypto/sha.h> |
| 21 | |
| 22 | |
| 23 | struct ccp_device; |
| 24 | struct ccp_cmd; |
| 25 | |
Tom Lendacky | db34cf9 | 2014-01-06 13:34:29 -0600 | [diff] [blame] | 26 | #if defined(CONFIG_CRYPTO_DEV_CCP_DD) || \ |
| 27 | defined(CONFIG_CRYPTO_DEV_CCP_DD_MODULE) |
| 28 | |
Tom Lendacky | 63b9450 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 29 | /** |
| 30 | * ccp_enqueue_cmd - queue an operation for processing by the CCP |
| 31 | * |
| 32 | * @cmd: ccp_cmd struct to be processed |
| 33 | * |
| 34 | * Refer to the ccp_cmd struct below for required fields. |
| 35 | * |
| 36 | * Queue a cmd to be processed by the CCP. If queueing the cmd |
| 37 | * would exceed the defined length of the cmd queue the cmd will |
| 38 | * only be queued if the CCP_CMD_MAY_BACKLOG flag is set and will |
| 39 | * result in a return code of -EBUSY. |
| 40 | * |
| 41 | * The callback routine specified in the ccp_cmd struct will be |
| 42 | * called to notify the caller of completion (if the cmd was not |
| 43 | * backlogged) or advancement out of the backlog. If the cmd has |
| 44 | * advanced out of the backlog the "err" value of the callback |
| 45 | * will be -EINPROGRESS. Any other "err" value during callback is |
| 46 | * the result of the operation. |
| 47 | * |
| 48 | * The cmd has been successfully queued if: |
| 49 | * the return code is -EINPROGRESS or |
| 50 | * the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set |
| 51 | */ |
| 52 | int ccp_enqueue_cmd(struct ccp_cmd *cmd); |
| 53 | |
Tom Lendacky | db34cf9 | 2014-01-06 13:34:29 -0600 | [diff] [blame] | 54 | #else /* CONFIG_CRYPTO_DEV_CCP_DD is not enabled */ |
| 55 | |
| 56 | static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd) |
| 57 | { |
| 58 | return -ENODEV; |
| 59 | } |
| 60 | |
| 61 | #endif /* CONFIG_CRYPTO_DEV_CCP_DD */ |
| 62 | |
Tom Lendacky | 63b9450 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 63 | |
| 64 | /***** AES engine *****/ |
| 65 | /** |
| 66 | * ccp_aes_type - AES key size |
| 67 | * |
| 68 | * @CCP_AES_TYPE_128: 128-bit key |
| 69 | * @CCP_AES_TYPE_192: 192-bit key |
| 70 | * @CCP_AES_TYPE_256: 256-bit key |
| 71 | */ |
| 72 | enum ccp_aes_type { |
| 73 | CCP_AES_TYPE_128 = 0, |
| 74 | CCP_AES_TYPE_192, |
| 75 | CCP_AES_TYPE_256, |
| 76 | CCP_AES_TYPE__LAST, |
| 77 | }; |
| 78 | |
| 79 | /** |
| 80 | * ccp_aes_mode - AES operation mode |
| 81 | * |
| 82 | * @CCP_AES_MODE_ECB: ECB mode |
| 83 | * @CCP_AES_MODE_CBC: CBC mode |
| 84 | * @CCP_AES_MODE_OFB: OFB mode |
| 85 | * @CCP_AES_MODE_CFB: CFB mode |
| 86 | * @CCP_AES_MODE_CTR: CTR mode |
| 87 | * @CCP_AES_MODE_CMAC: CMAC mode |
| 88 | */ |
| 89 | enum ccp_aes_mode { |
| 90 | CCP_AES_MODE_ECB = 0, |
| 91 | CCP_AES_MODE_CBC, |
| 92 | CCP_AES_MODE_OFB, |
| 93 | CCP_AES_MODE_CFB, |
| 94 | CCP_AES_MODE_CTR, |
| 95 | CCP_AES_MODE_CMAC, |
| 96 | CCP_AES_MODE__LAST, |
| 97 | }; |
| 98 | |
| 99 | /** |
| 100 | * ccp_aes_mode - AES operation mode |
| 101 | * |
| 102 | * @CCP_AES_ACTION_DECRYPT: AES decrypt operation |
| 103 | * @CCP_AES_ACTION_ENCRYPT: AES encrypt operation |
| 104 | */ |
| 105 | enum ccp_aes_action { |
| 106 | CCP_AES_ACTION_DECRYPT = 0, |
| 107 | CCP_AES_ACTION_ENCRYPT, |
| 108 | CCP_AES_ACTION__LAST, |
| 109 | }; |
| 110 | |
| 111 | /** |
| 112 | * struct ccp_aes_engine - CCP AES operation |
| 113 | * @type: AES operation key size |
| 114 | * @mode: AES operation mode |
| 115 | * @action: AES operation (decrypt/encrypt) |
| 116 | * @key: key to be used for this AES operation |
| 117 | * @key_len: length in bytes of key |
| 118 | * @iv: IV to be used for this AES operation |
| 119 | * @iv_len: length in bytes of iv |
| 120 | * @src: data to be used for this operation |
| 121 | * @dst: data produced by this operation |
| 122 | * @src_len: length in bytes of data used for this operation |
| 123 | * @cmac_final: indicates final operation when running in CMAC mode |
| 124 | * @cmac_key: K1/K2 key used in final CMAC operation |
| 125 | * @cmac_key_len: length in bytes of cmac_key |
| 126 | * |
| 127 | * Variables required to be set when calling ccp_enqueue_cmd(): |
| 128 | * - type, mode, action, key, key_len, src, dst, src_len |
| 129 | * - iv, iv_len for any mode other than ECB |
| 130 | * - cmac_final for CMAC mode |
| 131 | * - cmac_key, cmac_key_len for CMAC mode if cmac_final is non-zero |
| 132 | * |
| 133 | * The iv variable is used as both input and output. On completion of the |
| 134 | * AES operation the new IV overwrites the old IV. |
| 135 | */ |
| 136 | struct ccp_aes_engine { |
| 137 | enum ccp_aes_type type; |
| 138 | enum ccp_aes_mode mode; |
| 139 | enum ccp_aes_action action; |
| 140 | |
| 141 | struct scatterlist *key; |
| 142 | u32 key_len; /* In bytes */ |
| 143 | |
| 144 | struct scatterlist *iv; |
| 145 | u32 iv_len; /* In bytes */ |
| 146 | |
| 147 | struct scatterlist *src, *dst; |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 148 | u64 src_len; /* In bytes */ |
Tom Lendacky | 63b9450 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 149 | |
| 150 | u32 cmac_final; /* Indicates final cmac cmd */ |
| 151 | struct scatterlist *cmac_key; /* K1/K2 cmac key required for |
| 152 | * final cmac cmd */ |
| 153 | u32 cmac_key_len; /* In bytes */ |
| 154 | }; |
| 155 | |
| 156 | /***** XTS-AES engine *****/ |
| 157 | /** |
| 158 | * ccp_xts_aes_unit_size - XTS unit size |
| 159 | * |
| 160 | * @CCP_XTS_AES_UNIT_SIZE_16: Unit size of 16 bytes |
| 161 | * @CCP_XTS_AES_UNIT_SIZE_512: Unit size of 512 bytes |
| 162 | * @CCP_XTS_AES_UNIT_SIZE_1024: Unit size of 1024 bytes |
| 163 | * @CCP_XTS_AES_UNIT_SIZE_2048: Unit size of 2048 bytes |
| 164 | * @CCP_XTS_AES_UNIT_SIZE_4096: Unit size of 4096 bytes |
| 165 | */ |
| 166 | enum ccp_xts_aes_unit_size { |
| 167 | CCP_XTS_AES_UNIT_SIZE_16 = 0, |
| 168 | CCP_XTS_AES_UNIT_SIZE_512, |
| 169 | CCP_XTS_AES_UNIT_SIZE_1024, |
| 170 | CCP_XTS_AES_UNIT_SIZE_2048, |
| 171 | CCP_XTS_AES_UNIT_SIZE_4096, |
| 172 | CCP_XTS_AES_UNIT_SIZE__LAST, |
| 173 | }; |
| 174 | |
| 175 | /** |
| 176 | * struct ccp_xts_aes_engine - CCP XTS AES operation |
| 177 | * @action: AES operation (decrypt/encrypt) |
| 178 | * @unit_size: unit size of the XTS operation |
| 179 | * @key: key to be used for this XTS AES operation |
| 180 | * @key_len: length in bytes of key |
| 181 | * @iv: IV to be used for this XTS AES operation |
| 182 | * @iv_len: length in bytes of iv |
| 183 | * @src: data to be used for this operation |
| 184 | * @dst: data produced by this operation |
| 185 | * @src_len: length in bytes of data used for this operation |
| 186 | * @final: indicates final XTS operation |
| 187 | * |
| 188 | * Variables required to be set when calling ccp_enqueue_cmd(): |
| 189 | * - action, unit_size, key, key_len, iv, iv_len, src, dst, src_len, final |
| 190 | * |
| 191 | * The iv variable is used as both input and output. On completion of the |
| 192 | * AES operation the new IV overwrites the old IV. |
| 193 | */ |
| 194 | struct ccp_xts_aes_engine { |
| 195 | enum ccp_aes_action action; |
| 196 | enum ccp_xts_aes_unit_size unit_size; |
| 197 | |
| 198 | struct scatterlist *key; |
| 199 | u32 key_len; /* In bytes */ |
| 200 | |
| 201 | struct scatterlist *iv; |
| 202 | u32 iv_len; /* In bytes */ |
| 203 | |
| 204 | struct scatterlist *src, *dst; |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 205 | u64 src_len; /* In bytes */ |
Tom Lendacky | 63b9450 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 206 | |
| 207 | u32 final; |
| 208 | }; |
| 209 | |
| 210 | /***** SHA engine *****/ |
| 211 | #define CCP_SHA_BLOCKSIZE SHA256_BLOCK_SIZE |
| 212 | #define CCP_SHA_CTXSIZE SHA256_DIGEST_SIZE |
| 213 | |
| 214 | /** |
| 215 | * ccp_sha_type - type of SHA operation |
| 216 | * |
| 217 | * @CCP_SHA_TYPE_1: SHA-1 operation |
| 218 | * @CCP_SHA_TYPE_224: SHA-224 operation |
| 219 | * @CCP_SHA_TYPE_256: SHA-256 operation |
| 220 | */ |
| 221 | enum ccp_sha_type { |
| 222 | CCP_SHA_TYPE_1 = 1, |
| 223 | CCP_SHA_TYPE_224, |
| 224 | CCP_SHA_TYPE_256, |
| 225 | CCP_SHA_TYPE__LAST, |
| 226 | }; |
| 227 | |
| 228 | /** |
| 229 | * struct ccp_sha_engine - CCP SHA operation |
| 230 | * @type: Type of SHA operation |
| 231 | * @ctx: current hash value |
| 232 | * @ctx_len: length in bytes of hash value |
| 233 | * @src: data to be used for this operation |
| 234 | * @src_len: length in bytes of data used for this operation |
Tom Lendacky | c11baa0 | 2014-01-24 16:18:02 -0600 | [diff] [blame^] | 235 | * @opad: data to be used for final HMAC operation |
| 236 | * @opad_len: length in bytes of data used for final HMAC operation |
| 237 | * @first: indicates first SHA operation |
Tom Lendacky | 63b9450 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 238 | * @final: indicates final SHA operation |
| 239 | * @msg_bits: total length of the message in bits used in final SHA operation |
| 240 | * |
| 241 | * Variables required to be set when calling ccp_enqueue_cmd(): |
| 242 | * - type, ctx, ctx_len, src, src_len, final |
| 243 | * - msg_bits if final is non-zero |
| 244 | * |
| 245 | * The ctx variable is used as both input and output. On completion of the |
| 246 | * SHA operation the new hash value overwrites the old hash value. |
| 247 | */ |
| 248 | struct ccp_sha_engine { |
| 249 | enum ccp_sha_type type; |
| 250 | |
| 251 | struct scatterlist *ctx; |
| 252 | u32 ctx_len; /* In bytes */ |
| 253 | |
| 254 | struct scatterlist *src; |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 255 | u64 src_len; /* In bytes */ |
Tom Lendacky | 63b9450 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 256 | |
Tom Lendacky | c11baa0 | 2014-01-24 16:18:02 -0600 | [diff] [blame^] | 257 | struct scatterlist *opad; |
| 258 | u32 opad_len; /* In bytes */ |
| 259 | |
| 260 | u32 first; /* Indicates first sha cmd */ |
Tom Lendacky | 63b9450 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 261 | u32 final; /* Indicates final sha cmd */ |
| 262 | u64 msg_bits; /* Message length in bits required for |
| 263 | * final sha cmd */ |
| 264 | }; |
| 265 | |
| 266 | /***** RSA engine *****/ |
| 267 | /** |
| 268 | * struct ccp_rsa_engine - CCP RSA operation |
| 269 | * @key_size: length in bits of RSA key |
| 270 | * @exp: RSA exponent |
| 271 | * @exp_len: length in bytes of exponent |
| 272 | * @mod: RSA modulus |
| 273 | * @mod_len: length in bytes of modulus |
| 274 | * @src: data to be used for this operation |
| 275 | * @dst: data produced by this operation |
| 276 | * @src_len: length in bytes of data used for this operation |
| 277 | * |
| 278 | * Variables required to be set when calling ccp_enqueue_cmd(): |
| 279 | * - key_size, exp, exp_len, mod, mod_len, src, dst, src_len |
| 280 | */ |
| 281 | struct ccp_rsa_engine { |
| 282 | u32 key_size; /* In bits */ |
| 283 | |
| 284 | struct scatterlist *exp; |
| 285 | u32 exp_len; /* In bytes */ |
| 286 | |
| 287 | struct scatterlist *mod; |
| 288 | u32 mod_len; /* In bytes */ |
| 289 | |
| 290 | struct scatterlist *src, *dst; |
| 291 | u32 src_len; /* In bytes */ |
| 292 | }; |
| 293 | |
| 294 | /***** Passthru engine *****/ |
| 295 | /** |
| 296 | * ccp_passthru_bitwise - type of bitwise passthru operation |
| 297 | * |
| 298 | * @CCP_PASSTHRU_BITWISE_NOOP: no bitwise operation performed |
| 299 | * @CCP_PASSTHRU_BITWISE_AND: perform bitwise AND of src with mask |
| 300 | * @CCP_PASSTHRU_BITWISE_OR: perform bitwise OR of src with mask |
| 301 | * @CCP_PASSTHRU_BITWISE_XOR: perform bitwise XOR of src with mask |
| 302 | * @CCP_PASSTHRU_BITWISE_MASK: overwrite with mask |
| 303 | */ |
| 304 | enum ccp_passthru_bitwise { |
| 305 | CCP_PASSTHRU_BITWISE_NOOP = 0, |
| 306 | CCP_PASSTHRU_BITWISE_AND, |
| 307 | CCP_PASSTHRU_BITWISE_OR, |
| 308 | CCP_PASSTHRU_BITWISE_XOR, |
| 309 | CCP_PASSTHRU_BITWISE_MASK, |
| 310 | CCP_PASSTHRU_BITWISE__LAST, |
| 311 | }; |
| 312 | |
| 313 | /** |
| 314 | * ccp_passthru_byteswap - type of byteswap passthru operation |
| 315 | * |
| 316 | * @CCP_PASSTHRU_BYTESWAP_NOOP: no byte swapping performed |
| 317 | * @CCP_PASSTHRU_BYTESWAP_32BIT: swap bytes within 32-bit words |
| 318 | * @CCP_PASSTHRU_BYTESWAP_256BIT: swap bytes within 256-bit words |
| 319 | */ |
| 320 | enum ccp_passthru_byteswap { |
| 321 | CCP_PASSTHRU_BYTESWAP_NOOP = 0, |
| 322 | CCP_PASSTHRU_BYTESWAP_32BIT, |
| 323 | CCP_PASSTHRU_BYTESWAP_256BIT, |
| 324 | CCP_PASSTHRU_BYTESWAP__LAST, |
| 325 | }; |
| 326 | |
| 327 | /** |
| 328 | * struct ccp_passthru_engine - CCP pass-through operation |
| 329 | * @bit_mod: bitwise operation to perform |
| 330 | * @byte_swap: byteswap operation to perform |
| 331 | * @mask: mask to be applied to data |
| 332 | * @mask_len: length in bytes of mask |
| 333 | * @src: data to be used for this operation |
| 334 | * @dst: data produced by this operation |
| 335 | * @src_len: length in bytes of data used for this operation |
| 336 | * @final: indicate final pass-through operation |
| 337 | * |
| 338 | * Variables required to be set when calling ccp_enqueue_cmd(): |
| 339 | * - bit_mod, byte_swap, src, dst, src_len |
| 340 | * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP |
| 341 | */ |
| 342 | struct ccp_passthru_engine { |
| 343 | enum ccp_passthru_bitwise bit_mod; |
| 344 | enum ccp_passthru_byteswap byte_swap; |
| 345 | |
| 346 | struct scatterlist *mask; |
| 347 | u32 mask_len; /* In bytes */ |
| 348 | |
| 349 | struct scatterlist *src, *dst; |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 350 | u64 src_len; /* In bytes */ |
Tom Lendacky | 63b9450 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 351 | |
| 352 | u32 final; |
| 353 | }; |
| 354 | |
| 355 | /***** ECC engine *****/ |
| 356 | #define CCP_ECC_MODULUS_BYTES 48 /* 384-bits */ |
| 357 | #define CCP_ECC_MAX_OPERANDS 6 |
| 358 | #define CCP_ECC_MAX_OUTPUTS 3 |
| 359 | |
| 360 | /** |
| 361 | * ccp_ecc_function - type of ECC function |
| 362 | * |
| 363 | * @CCP_ECC_FUNCTION_MMUL_384BIT: 384-bit modular multiplication |
| 364 | * @CCP_ECC_FUNCTION_MADD_384BIT: 384-bit modular addition |
| 365 | * @CCP_ECC_FUNCTION_MINV_384BIT: 384-bit multiplicative inverse |
| 366 | * @CCP_ECC_FUNCTION_PADD_384BIT: 384-bit point addition |
| 367 | * @CCP_ECC_FUNCTION_PMUL_384BIT: 384-bit point multiplication |
| 368 | * @CCP_ECC_FUNCTION_PDBL_384BIT: 384-bit point doubling |
| 369 | */ |
| 370 | enum ccp_ecc_function { |
| 371 | CCP_ECC_FUNCTION_MMUL_384BIT = 0, |
| 372 | CCP_ECC_FUNCTION_MADD_384BIT, |
| 373 | CCP_ECC_FUNCTION_MINV_384BIT, |
| 374 | CCP_ECC_FUNCTION_PADD_384BIT, |
| 375 | CCP_ECC_FUNCTION_PMUL_384BIT, |
| 376 | CCP_ECC_FUNCTION_PDBL_384BIT, |
| 377 | }; |
| 378 | |
| 379 | /** |
| 380 | * struct ccp_ecc_modular_math - CCP ECC modular math parameters |
| 381 | * @operand_1: first operand for the modular math operation |
| 382 | * @operand_1_len: length of the first operand |
| 383 | * @operand_2: second operand for the modular math operation |
| 384 | * (not used for CCP_ECC_FUNCTION_MINV_384BIT) |
| 385 | * @operand_2_len: length of the second operand |
| 386 | * (not used for CCP_ECC_FUNCTION_MINV_384BIT) |
| 387 | * @result: result of the modular math operation |
| 388 | * @result_len: length of the supplied result buffer |
| 389 | */ |
| 390 | struct ccp_ecc_modular_math { |
| 391 | struct scatterlist *operand_1; |
| 392 | unsigned int operand_1_len; /* In bytes */ |
| 393 | |
| 394 | struct scatterlist *operand_2; |
| 395 | unsigned int operand_2_len; /* In bytes */ |
| 396 | |
| 397 | struct scatterlist *result; |
| 398 | unsigned int result_len; /* In bytes */ |
| 399 | }; |
| 400 | |
| 401 | /** |
| 402 | * struct ccp_ecc_point - CCP ECC point definition |
| 403 | * @x: the x coordinate of the ECC point |
| 404 | * @x_len: the length of the x coordinate |
| 405 | * @y: the y coordinate of the ECC point |
| 406 | * @y_len: the length of the y coordinate |
| 407 | */ |
| 408 | struct ccp_ecc_point { |
| 409 | struct scatterlist *x; |
| 410 | unsigned int x_len; /* In bytes */ |
| 411 | |
| 412 | struct scatterlist *y; |
| 413 | unsigned int y_len; /* In bytes */ |
| 414 | }; |
| 415 | |
| 416 | /** |
| 417 | * struct ccp_ecc_point_math - CCP ECC point math parameters |
| 418 | * @point_1: the first point of the ECC point math operation |
| 419 | * @point_2: the second point of the ECC point math operation |
| 420 | * (only used for CCP_ECC_FUNCTION_PADD_384BIT) |
| 421 | * @domain_a: the a parameter of the ECC curve |
| 422 | * @domain_a_len: the length of the a parameter |
| 423 | * @scalar: the scalar parameter for the point match operation |
| 424 | * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) |
| 425 | * @scalar_len: the length of the scalar parameter |
| 426 | * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) |
| 427 | * @result: the point resulting from the point math operation |
| 428 | */ |
| 429 | struct ccp_ecc_point_math { |
| 430 | struct ccp_ecc_point point_1; |
| 431 | struct ccp_ecc_point point_2; |
| 432 | |
| 433 | struct scatterlist *domain_a; |
| 434 | unsigned int domain_a_len; /* In bytes */ |
| 435 | |
| 436 | struct scatterlist *scalar; |
| 437 | unsigned int scalar_len; /* In bytes */ |
| 438 | |
| 439 | struct ccp_ecc_point result; |
| 440 | }; |
| 441 | |
| 442 | /** |
| 443 | * struct ccp_ecc_engine - CCP ECC operation |
| 444 | * @function: ECC function to perform |
| 445 | * @mod: ECC modulus |
| 446 | * @mod_len: length in bytes of modulus |
| 447 | * @mm: module math parameters |
| 448 | * @pm: point math parameters |
| 449 | * @ecc_result: result of the ECC operation |
| 450 | * |
| 451 | * Variables required to be set when calling ccp_enqueue_cmd(): |
| 452 | * - function, mod, mod_len |
| 453 | * - operand, operand_len, operand_count, output, output_len, output_count |
| 454 | * - ecc_result |
| 455 | */ |
| 456 | struct ccp_ecc_engine { |
| 457 | enum ccp_ecc_function function; |
| 458 | |
| 459 | struct scatterlist *mod; |
| 460 | u32 mod_len; /* In bytes */ |
| 461 | |
| 462 | union { |
| 463 | struct ccp_ecc_modular_math mm; |
| 464 | struct ccp_ecc_point_math pm; |
| 465 | } u; |
| 466 | |
| 467 | u16 ecc_result; |
| 468 | }; |
| 469 | |
| 470 | |
| 471 | /** |
| 472 | * ccp_engine - CCP operation identifiers |
| 473 | * |
| 474 | * @CCP_ENGINE_AES: AES operation |
| 475 | * @CCP_ENGINE_XTS_AES: 128-bit XTS AES operation |
| 476 | * @CCP_ENGINE_RSVD1: unused |
| 477 | * @CCP_ENGINE_SHA: SHA operation |
| 478 | * @CCP_ENGINE_RSA: RSA operation |
| 479 | * @CCP_ENGINE_PASSTHRU: pass-through operation |
| 480 | * @CCP_ENGINE_ZLIB_DECOMPRESS: unused |
| 481 | * @CCP_ENGINE_ECC: ECC operation |
| 482 | */ |
| 483 | enum ccp_engine { |
| 484 | CCP_ENGINE_AES = 0, |
| 485 | CCP_ENGINE_XTS_AES_128, |
| 486 | CCP_ENGINE_RSVD1, |
| 487 | CCP_ENGINE_SHA, |
| 488 | CCP_ENGINE_RSA, |
| 489 | CCP_ENGINE_PASSTHRU, |
| 490 | CCP_ENGINE_ZLIB_DECOMPRESS, |
| 491 | CCP_ENGINE_ECC, |
| 492 | CCP_ENGINE__LAST, |
| 493 | }; |
| 494 | |
| 495 | /* Flag values for flags member of ccp_cmd */ |
| 496 | #define CCP_CMD_MAY_BACKLOG 0x00000001 |
| 497 | |
| 498 | /** |
| 499 | * struct ccp_cmd - CPP operation request |
| 500 | * @entry: list element (ccp driver use only) |
| 501 | * @work: work element used for callbacks (ccp driver use only) |
| 502 | * @ccp: CCP device to be run on (ccp driver use only) |
| 503 | * @ret: operation return code (ccp driver use only) |
| 504 | * @flags: cmd processing flags |
| 505 | * @engine: CCP operation to perform |
| 506 | * @engine_error: CCP engine return code |
| 507 | * @u: engine specific structures, refer to specific engine struct below |
| 508 | * @callback: operation completion callback function |
| 509 | * @data: parameter value to be supplied to the callback function |
| 510 | * |
| 511 | * Variables required to be set when calling ccp_enqueue_cmd(): |
| 512 | * - engine, callback |
| 513 | * - See the operation structures below for what is required for each |
| 514 | * operation. |
| 515 | */ |
| 516 | struct ccp_cmd { |
| 517 | /* The list_head, work_struct, ccp and ret variables are for use |
| 518 | * by the CCP driver only. |
| 519 | */ |
| 520 | struct list_head entry; |
| 521 | struct work_struct work; |
| 522 | struct ccp_device *ccp; |
| 523 | int ret; |
| 524 | |
| 525 | u32 flags; |
| 526 | |
| 527 | enum ccp_engine engine; |
| 528 | u32 engine_error; |
| 529 | |
| 530 | union { |
| 531 | struct ccp_aes_engine aes; |
| 532 | struct ccp_xts_aes_engine xts; |
| 533 | struct ccp_sha_engine sha; |
| 534 | struct ccp_rsa_engine rsa; |
| 535 | struct ccp_passthru_engine passthru; |
| 536 | struct ccp_ecc_engine ecc; |
| 537 | } u; |
| 538 | |
| 539 | /* Completion callback support */ |
| 540 | void (*callback)(void *data, int err); |
| 541 | void *data; |
| 542 | }; |
| 543 | |
| 544 | #endif |