1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * K3 SA2UL crypto accelerator driver 4 * 5 * Copyright (C) 2018-2020 Texas Instruments Incorporated - http://www.ti.com 6 * 7 * Authors: Keerthy 8 * Vitaly Andrianov 9 * Tero Kristo 10 */ 11 12 #ifndef _K3_SA2UL_ 13 #define _K3_SA2UL_ 14 15 #include <crypto/aes.h> 16 #include <crypto/sha1.h> 17 #include <crypto/sha2.h> 18 19 #define SA_ENGINE_ENABLE_CONTROL 0x1000 20 21 struct sa_tfm_ctx; 22 /* 23 * SA_ENGINE_ENABLE_CONTROL register bits 24 */ 25 #define SA_EEC_ENCSS_EN 0x00000001 26 #define SA_EEC_AUTHSS_EN 0x00000002 27 #define SA_EEC_TRNG_EN 0x00000008 28 #define SA_EEC_PKA_EN 0x00000010 29 #define SA_EEC_CTXCACH_EN 0x00000080 30 #define SA_EEC_CPPI_PORT_IN_EN 0x00000200 31 #define SA_EEC_CPPI_PORT_OUT_EN 0x00000800 32 33 /* 34 * Encoding used to identify the typo of crypto operation 35 * performed on the packet when the packet is returned 36 * by SA 37 */ 38 #define SA_REQ_SUBTYPE_ENC 0x0001 39 #define SA_REQ_SUBTYPE_DEC 0x0002 40 #define SA_REQ_SUBTYPE_SHIFT 16 41 #define SA_REQ_SUBTYPE_MASK 0xffff 42 43 /* Number of 32 bit words in EPIB */ 44 #define SA_DMA_NUM_EPIB_WORDS 4 45 46 /* Number of 32 bit words in PS data */ 47 #define SA_DMA_NUM_PS_WORDS 16 48 #define NKEY_SZ 3 49 #define MCI_SZ 27 50 51 /* 52 * Maximum number of simultaeneous security contexts 53 * supported by the driver 54 */ 55 #define SA_MAX_NUM_CTX 512 56 57 /* 58 * Assumption: CTX size is multiple of 32 59 */ 60 #define SA_CTX_SIZE_TO_DMA_SIZE(ctx_sz) \ 61 ((ctx_sz) ? ((ctx_sz) / 32 - 1) : 0) 62 63 #define SA_CTX_ENC_KEY_OFFSET 32 64 #define SA_CTX_ENC_AUX1_OFFSET 64 65 #define SA_CTX_ENC_AUX2_OFFSET 96 66 #define SA_CTX_ENC_AUX3_OFFSET 112 67 #define SA_CTX_ENC_AUX4_OFFSET 128 68 69 /* Next Engine Select code in CP_ACE */ 70 #define SA_ENG_ID_EM1 2 /* Enc/Dec engine with AES/DEC core */ 71 #define SA_ENG_ID_EM2 3 /* Encryption/Decryption enginefor pass 2 */ 72 #define SA_ENG_ID_AM1 4 /* Auth. engine with SHA1/MD5/SHA2 core */ 73 #define SA_ENG_ID_AM2 5 /* Authentication engine for pass 2 */ 74 #define SA_ENG_ID_OUTPORT2 20 /* Egress module 2 */ 75 76 /* 77 * Command Label Definitions 78 */ 79 #define SA_CMDL_OFFSET_NESC 0 /* Next Engine Select Code */ 80 #define SA_CMDL_OFFSET_LABEL_LEN 1 /* Engine Command Label Length */ 81 /* 16-bit Length of Data to be processed */ 82 #define SA_CMDL_OFFSET_DATA_LEN 2 83 #define SA_CMDL_OFFSET_DATA_OFFSET 4 /* Stat Data Offset */ 84 #define SA_CMDL_OFFSET_OPTION_CTRL1 5 /* Option Control Byte 1 */ 85 #define SA_CMDL_OFFSET_OPTION_CTRL2 6 /* Option Control Byte 2 */ 86 #define SA_CMDL_OFFSET_OPTION_CTRL3 7 /* Option Control Byte 3 */ 87 #define SA_CMDL_OFFSET_OPTION_BYTE 8 88 89 #define SA_CMDL_HEADER_SIZE_BYTES 8 90 91 #define SA_CMDL_OPTION_BYTES_MAX_SIZE 72 92 #define SA_CMDL_MAX_SIZE_BYTES (SA_CMDL_HEADER_SIZE_BYTES + \ 93 SA_CMDL_OPTION_BYTES_MAX_SIZE) 94 95 /* SWINFO word-0 flags */ 96 #define SA_SW_INFO_FLAG_EVICT 0x0001 97 #define SA_SW_INFO_FLAG_TEAR 0x0002 98 #define SA_SW_INFO_FLAG_NOPD 0x0004 99 100 /* 101 * This type represents the various packet types to be processed 102 * by the PHP engine in SA. 103 * It is used to identify the corresponding PHP processing function. 104 */ 105 #define SA_CTX_PE_PKT_TYPE_3GPP_AIR 0 /* 3GPP Air Cipher */ 106 #define SA_CTX_PE_PKT_TYPE_SRTP 1 /* SRTP */ 107 #define SA_CTX_PE_PKT_TYPE_IPSEC_AH 2 /* IPSec Authentication Header */ 108 /* IPSec Encapsulating Security Payload */ 109 #define SA_CTX_PE_PKT_TYPE_IPSEC_ESP 3 110 /* Indicates that it is in data mode, It may not be used by PHP */ 111 #define SA_CTX_PE_PKT_TYPE_NONE 4 112 #define SA_CTX_ENC_TYPE1_SZ 64 /* Encryption SC with Key only */ 113 #define SA_CTX_ENC_TYPE2_SZ 96 /* Encryption SC with Key and Aux1 */ 114 115 #define SA_CTX_AUTH_TYPE1_SZ 64 /* Auth SC with Key only */ 116 #define SA_CTX_AUTH_TYPE2_SZ 96 /* Auth SC with Key and Aux1 */ 117 /* Size of security context for PHP engine */ 118 #define SA_CTX_PHP_PE_CTX_SZ 64 119 120 #define SA_CTX_MAX_SZ (64 + SA_CTX_ENC_TYPE2_SZ + SA_CTX_AUTH_TYPE2_SZ) 121 122 /* 123 * Encoding of F/E control in SCCTL 124 * Bit 0-1: Fetch PHP Bytes 125 * Bit 2-3: Fetch Encryption/Air Ciphering Bytes 126 * Bit 4-5: Fetch Authentication Bytes or Encr pass 2 127 * Bit 6-7: Evict PHP Bytes 128 * 129 * where 00 = 0 bytes 130 * 01 = 64 bytes 131 * 10 = 96 bytes 132 * 11 = 128 bytes 133 */ 134 #define SA_CTX_DMA_SIZE_0 0 135 #define SA_CTX_DMA_SIZE_64 1 136 #define SA_CTX_DMA_SIZE_96 2 137 #define SA_CTX_DMA_SIZE_128 3 138 139 /* 140 * Byte offset of the owner word in SCCTL 141 * in the security context 142 */ 143 #define SA_CTX_SCCTL_OWNER_OFFSET 0 144 145 #define SA_CTX_ENC_KEY_OFFSET 32 146 #define SA_CTX_ENC_AUX1_OFFSET 64 147 #define SA_CTX_ENC_AUX2_OFFSET 96 148 #define SA_CTX_ENC_AUX3_OFFSET 112 149 #define SA_CTX_ENC_AUX4_OFFSET 128 150 151 #define SA_SCCTL_FE_AUTH_ENC 0x65 152 #define SA_SCCTL_FE_ENC 0x8D 153 154 #define SA_ALIGN_MASK (sizeof(u32) - 1) 155 #define SA_ALIGNED __aligned(32) 156 157 #define SA_AUTH_SW_CTRL_MD5 1 158 #define SA_AUTH_SW_CTRL_SHA1 2 159 #define SA_AUTH_SW_CTRL_SHA224 3 160 #define SA_AUTH_SW_CTRL_SHA256 4 161 #define SA_AUTH_SW_CTRL_SHA384 5 162 #define SA_AUTH_SW_CTRL_SHA512 6 163 164 /* SA2UL can only handle maximum data size of 64KB */ 165 #define SA_MAX_DATA_SZ U16_MAX 166 167 /* 168 * SA2UL can provide unpredictable results with packet sizes that fall 169 * the following range, so avoid using it. 170 */ 171 #define SA_UNSAFE_DATA_SZ_MIN 240 172 #define SA_UNSAFE_DATA_SZ_MAX 256 173 174 /** 175 * struct sa_crypto_data - Crypto driver instance data 176 * @base: Base address of the register space 177 * @pdev: Platform device pointer 178 * @sc_pool: security context pool 179 * @dev: Device pointer 180 * @scid_lock: secure context ID lock 181 * @sc_id_start: starting index for SC ID 182 * @sc_id_end: Ending index for SC ID 183 * @sc_id: Security Context ID 184 * @ctx_bm: Bitmap to keep track of Security context ID's 185 * @ctx: SA tfm context pointer 186 * @dma_rx1: Pointer to DMA rx channel for sizes < 256 Bytes 187 * @dma_rx2: Pointer to DMA rx channel for sizes > 256 Bytes 188 * @dma_tx: Pointer to DMA TX channel 189 */ 190 struct sa_crypto_data { 191 void __iomem *base; 192 struct platform_device *pdev; 193 struct dma_pool *sc_pool; 194 struct device *dev; 195 spinlock_t scid_lock; /* lock for SC-ID allocation */ 196 /* Security context data */ 197 u16 sc_id_start; 198 u16 sc_id_end; 199 u16 sc_id; 200 unsigned long ctx_bm[DIV_ROUND_UP(SA_MAX_NUM_CTX, 201 BITS_PER_LONG)]; 202 struct sa_tfm_ctx *ctx; 203 struct dma_chan *dma_rx1; 204 struct dma_chan *dma_rx2; 205 struct dma_chan *dma_tx; 206 }; 207 208 /** 209 * struct sa_cmdl_param_info: Command label parameters info 210 * @index: Index of the parameter in the command label format 211 * @offset: the offset of the parameter 212 * @size: Size of the parameter 213 */ 214 struct sa_cmdl_param_info { 215 u16 index; 216 u16 offset; 217 u16 size; 218 }; 219 220 /* Maximum length of Auxiliary data in 32bit words */ 221 #define SA_MAX_AUX_DATA_WORDS 8 222 223 /** 224 * struct sa_cmdl_upd_info: Command label updation info 225 * @flags: flags in command label 226 * @submode: Encryption submodes 227 * @enc_size: Size of first pass encryption size 228 * @enc_size2: Size of second pass encryption size 229 * @enc_offset: Encryption payload offset in the packet 230 * @enc_iv: Encryption initialization vector for pass2 231 * @enc_iv2: Encryption initialization vector for pass2 232 * @aad: Associated data 233 * @payload: Payload info 234 * @auth_size: Authentication size for pass 1 235 * @auth_size2: Authentication size for pass 2 236 * @auth_offset: Authentication payload offset 237 * @auth_iv: Authentication initialization vector 238 * @aux_key_info: Authentication aux key information 239 * @aux_key: Aux key for authentication 240 */ 241 struct sa_cmdl_upd_info { 242 u16 flags; 243 u16 submode; 244 struct sa_cmdl_param_info enc_size; 245 struct sa_cmdl_param_info enc_size2; 246 struct sa_cmdl_param_info enc_offset; 247 struct sa_cmdl_param_info enc_iv; 248 struct sa_cmdl_param_info enc_iv2; 249 struct sa_cmdl_param_info aad; 250 struct sa_cmdl_param_info payload; 251 struct sa_cmdl_param_info auth_size; 252 struct sa_cmdl_param_info auth_size2; 253 struct sa_cmdl_param_info auth_offset; 254 struct sa_cmdl_param_info auth_iv; 255 struct sa_cmdl_param_info aux_key_info; 256 u32 aux_key[SA_MAX_AUX_DATA_WORDS]; 257 }; 258 259 /* 260 * Number of 32bit words appended after the command label 261 * in PSDATA to identify the crypto request context. 262 * word-0: Request type 263 * word-1: pointer to request 264 */ 265 #define SA_PSDATA_CTX_WORDS 4 266 267 /* Maximum size of Command label in 32 words */ 268 #define SA_MAX_CMDL_WORDS (SA_DMA_NUM_PS_WORDS - SA_PSDATA_CTX_WORDS) 269 270 /** 271 * struct sa_ctx_info: SA context information 272 * @sc: Pointer to security context 273 * @sc_phys: Security context physical address that is passed on to SA2UL 274 * @sc_id: Security context ID 275 * @cmdl_size: Command label size 276 * @cmdl: Command label for a particular iteration 277 * @cmdl_upd_info: structure holding command label updation info 278 * @epib: Extended protocol information block words 279 */ 280 struct sa_ctx_info { 281 u8 *sc; 282 dma_addr_t sc_phys; 283 u16 sc_id; 284 u16 cmdl_size; 285 u32 cmdl[SA_MAX_CMDL_WORDS]; 286 struct sa_cmdl_upd_info cmdl_upd_info; 287 /* Store Auxiliary data such as K2/K3 subkeys in AES-XCBC */ 288 u32 epib[SA_DMA_NUM_EPIB_WORDS]; 289 }; 290 291 /** 292 * struct sa_tfm_ctx: TFM context structure 293 * @dev_data: struct sa_crypto_data pointer 294 * @enc: struct sa_ctx_info for encryption 295 * @dec: struct sa_ctx_info for decryption 296 * @keylen: encrption/decryption keylength 297 * @iv_idx: Initialization vector index 298 * @key: encryption key 299 * @fallback: SW fallback algorithm 300 */ 301 struct sa_tfm_ctx { 302 struct sa_crypto_data *dev_data; 303 struct sa_ctx_info enc; 304 struct sa_ctx_info dec; 305 struct sa_ctx_info auth; 306 int keylen; 307 int iv_idx; 308 u32 key[AES_KEYSIZE_256 / sizeof(u32)]; 309 u8 authkey[SHA512_BLOCK_SIZE]; 310 struct crypto_shash *shash; 311 /* for fallback */ 312 union { 313 struct crypto_skcipher *skcipher; 314 struct crypto_ahash *ahash; 315 struct crypto_aead *aead; 316 } fallback; 317 }; 318 319 /** 320 * struct sa_sha_req_ctx: Structure used for sha request 321 * @dev_data: struct sa_crypto_data pointer 322 * @cmdl: Complete command label with psdata and epib included 323 * @fallback_req: SW fallback request container 324 */ 325 struct sa_sha_req_ctx { 326 struct sa_crypto_data *dev_data; 327 u32 cmdl[SA_MAX_CMDL_WORDS + SA_PSDATA_CTX_WORDS]; 328 struct ahash_request fallback_req; 329 }; 330 331 enum sa_submode { 332 SA_MODE_GEN = 0, 333 SA_MODE_CCM, 334 SA_MODE_GCM, 335 SA_MODE_GMAC 336 }; 337 338 /* Encryption algorithms */ 339 enum sa_ealg_id { 340 SA_EALG_ID_NONE = 0, /* No encryption */ 341 SA_EALG_ID_NULL, /* NULL encryption */ 342 SA_EALG_ID_AES_CTR, /* AES Counter mode */ 343 SA_EALG_ID_AES_F8, /* AES F8 mode */ 344 SA_EALG_ID_AES_CBC, /* AES CBC mode */ 345 SA_EALG_ID_DES_CBC, /* DES CBC mode */ 346 SA_EALG_ID_3DES_CBC, /* 3DES CBC mode */ 347 SA_EALG_ID_CCM, /* Counter with CBC-MAC mode */ 348 SA_EALG_ID_GCM, /* Galois Counter mode */ 349 SA_EALG_ID_AES_ECB, 350 SA_EALG_ID_LAST 351 }; 352 353 /* Authentication algorithms */ 354 enum sa_aalg_id { 355 SA_AALG_ID_NONE = 0, /* No Authentication */ 356 SA_AALG_ID_NULL = SA_EALG_ID_LAST, /* NULL Authentication */ 357 SA_AALG_ID_MD5, /* MD5 mode */ 358 SA_AALG_ID_SHA1, /* SHA1 mode */ 359 SA_AALG_ID_SHA2_224, /* 224-bit SHA2 mode */ 360 SA_AALG_ID_SHA2_256, /* 256-bit SHA2 mode */ 361 SA_AALG_ID_SHA2_512, /* 512-bit SHA2 mode */ 362 SA_AALG_ID_HMAC_MD5, /* HMAC with MD5 mode */ 363 SA_AALG_ID_HMAC_SHA1, /* HMAC with SHA1 mode */ 364 SA_AALG_ID_HMAC_SHA2_224, /* HMAC with 224-bit SHA2 mode */ 365 SA_AALG_ID_HMAC_SHA2_256, /* HMAC with 256-bit SHA2 mode */ 366 SA_AALG_ID_GMAC, /* Galois Message Auth. Code mode */ 367 SA_AALG_ID_CMAC, /* Cipher-based Mes. Auth. Code mode */ 368 SA_AALG_ID_CBC_MAC, /* Cipher Block Chaining */ 369 SA_AALG_ID_AES_XCBC /* AES Extended Cipher Block Chaining */ 370 }; 371 372 /* 373 * Mode control engine algorithms used to index the 374 * mode control instruction tables 375 */ 376 enum sa_eng_algo_id { 377 SA_ENG_ALGO_ECB = 0, 378 SA_ENG_ALGO_CBC, 379 SA_ENG_ALGO_CFB, 380 SA_ENG_ALGO_OFB, 381 SA_ENG_ALGO_CTR, 382 SA_ENG_ALGO_F8, 383 SA_ENG_ALGO_F8F9, 384 SA_ENG_ALGO_GCM, 385 SA_ENG_ALGO_GMAC, 386 SA_ENG_ALGO_CCM, 387 SA_ENG_ALGO_CMAC, 388 SA_ENG_ALGO_CBCMAC, 389 SA_NUM_ENG_ALGOS 390 }; 391 392 /** 393 * struct sa_eng_info: Security accelerator engine info 394 * @eng_id: Engine ID 395 * @sc_size: security context size 396 */ 397 struct sa_eng_info { 398 u8 eng_id; 399 u16 sc_size; 400 }; 401 402 #endif /* _K3_SA2UL_ */ 403