1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * sun8i-ce.h - hardware cryptographic offloader for 4 * Allwinner H3/A64/H5/H2+/H6 SoC 5 * 6 * Copyright (C) 2016-2019 Corentin LABBE <clabbe.montjoie@gmail.com> 7 */ 8 #include <crypto/aes.h> 9 #include <crypto/des.h> 10 #include <crypto/engine.h> 11 #include <crypto/skcipher.h> 12 #include <linux/atomic.h> 13 #include <linux/debugfs.h> 14 #include <linux/crypto.h> 15 #include <linux/hw_random.h> 16 #include <crypto/internal/hash.h> 17 #include <crypto/md5.h> 18 #include <crypto/rng.h> 19 #include <crypto/sha.h> 20 21 /* CE Registers */ 22 #define CE_TDQ 0x00 23 #define CE_CTR 0x04 24 #define CE_ICR 0x08 25 #define CE_ISR 0x0C 26 #define CE_TLR 0x10 27 #define CE_TSR 0x14 28 #define CE_ESR 0x18 29 #define CE_CSSGR 0x1C 30 #define CE_CDSGR 0x20 31 #define CE_CSAR 0x24 32 #define CE_CDAR 0x28 33 #define CE_TPR 0x2C 34 35 /* Used in struct ce_task */ 36 /* ce_task common */ 37 #define CE_ENCRYPTION 0 38 #define CE_DECRYPTION BIT(8) 39 40 #define CE_COMM_INT BIT(31) 41 42 /* ce_task symmetric */ 43 #define CE_AES_128BITS 0 44 #define CE_AES_192BITS 1 45 #define CE_AES_256BITS 2 46 47 #define CE_OP_ECB 0 48 #define CE_OP_CBC (1 << 8) 49 50 #define CE_ALG_AES 0 51 #define CE_ALG_DES 1 52 #define CE_ALG_3DES 2 53 #define CE_ALG_MD5 16 54 #define CE_ALG_SHA1 17 55 #define CE_ALG_SHA224 18 56 #define CE_ALG_SHA256 19 57 #define CE_ALG_SHA384 20 58 #define CE_ALG_SHA512 21 59 #define CE_ALG_TRNG 48 60 #define CE_ALG_PRNG 49 61 #define CE_ALG_TRNG_V2 0x1c 62 #define CE_ALG_PRNG_V2 0x1d 63 64 /* Used in ce_variant */ 65 #define CE_ID_NOTSUPP 0xFF 66 67 #define CE_ID_CIPHER_AES 0 68 #define CE_ID_CIPHER_DES 1 69 #define CE_ID_CIPHER_DES3 2 70 #define CE_ID_CIPHER_MAX 3 71 72 #define CE_ID_HASH_MD5 0 73 #define CE_ID_HASH_SHA1 1 74 #define CE_ID_HASH_SHA224 2 75 #define CE_ID_HASH_SHA256 3 76 #define CE_ID_HASH_SHA384 4 77 #define CE_ID_HASH_SHA512 5 78 #define CE_ID_HASH_MAX 6 79 80 #define CE_ID_OP_ECB 0 81 #define CE_ID_OP_CBC 1 82 #define CE_ID_OP_MAX 2 83 84 /* Used in CE registers */ 85 #define CE_ERR_ALGO_NOTSUP BIT(0) 86 #define CE_ERR_DATALEN BIT(1) 87 #define CE_ERR_KEYSRAM BIT(2) 88 #define CE_ERR_ADDR_INVALID BIT(5) 89 #define CE_ERR_KEYLADDER BIT(6) 90 91 #define ESR_H3 0 92 #define ESR_A64 1 93 #define ESR_R40 2 94 #define ESR_H5 3 95 #define ESR_H6 4 96 97 #define PRNG_DATA_SIZE (160 / 8) 98 #define PRNG_SEED_SIZE DIV_ROUND_UP(175, 8) 99 #define PRNG_LD BIT(17) 100 101 #define CE_DIE_ID_SHIFT 16 102 #define CE_DIE_ID_MASK 0x07 103 104 #define MAX_SG 8 105 106 #define CE_MAX_CLOCKS 3 107 108 #define MAXFLOW 4 109 110 /* 111 * struct ce_clock - Describe clocks used by sun8i-ce 112 * @name: Name of clock needed by this variant 113 * @freq: Frequency to set for each clock 114 * @max_freq: Maximum frequency for each clock (generally given by datasheet) 115 */ 116 struct ce_clock { 117 const char *name; 118 unsigned long freq; 119 unsigned long max_freq; 120 }; 121 122 /* 123 * struct ce_variant - Describe CE capability for each variant hardware 124 * @alg_cipher: list of supported ciphers. for each CE_ID_ this will give the 125 * coresponding CE_ALG_XXX value 126 * @alg_hash: list of supported hashes. for each CE_ID_ this will give the 127 * corresponding CE_ALG_XXX value 128 * @op_mode: list of supported block modes 129 * @cipher_t_dlen_in_bytes: Does the request size for cipher is in 130 * bytes or words 131 * @hash_t_dlen_in_bytes: Does the request size for hash is in 132 * bits or words 133 * @prng_t_dlen_in_bytes: Does the request size for PRNG is in 134 * bytes or words 135 * @trng_t_dlen_in_bytes: Does the request size for TRNG is in 136 * bytes or words 137 * @ce_clks: list of clocks needed by this variant 138 * @esr: The type of error register 139 * @prng: The CE_ALG_XXX value for the PRNG 140 * @trng: The CE_ALG_XXX value for the TRNG 141 */ 142 struct ce_variant { 143 char alg_cipher[CE_ID_CIPHER_MAX]; 144 char alg_hash[CE_ID_HASH_MAX]; 145 u32 op_mode[CE_ID_OP_MAX]; 146 bool cipher_t_dlen_in_bytes; 147 bool hash_t_dlen_in_bits; 148 bool prng_t_dlen_in_bytes; 149 bool trng_t_dlen_in_bytes; 150 struct ce_clock ce_clks[CE_MAX_CLOCKS]; 151 int esr; 152 unsigned char prng; 153 unsigned char trng; 154 }; 155 156 struct sginfo { 157 __le32 addr; 158 __le32 len; 159 } __packed; 160 161 /* 162 * struct ce_task - CE Task descriptor 163 * The structure of this descriptor could be found in the datasheet 164 */ 165 struct ce_task { 166 __le32 t_id; 167 __le32 t_common_ctl; 168 __le32 t_sym_ctl; 169 __le32 t_asym_ctl; 170 __le32 t_key; 171 __le32 t_iv; 172 __le32 t_ctr; 173 __le32 t_dlen; 174 struct sginfo t_src[MAX_SG]; 175 struct sginfo t_dst[MAX_SG]; 176 __le32 next; 177 __le32 reserved[3]; 178 } __packed __aligned(8); 179 180 /* 181 * struct sun8i_ce_flow - Information used by each flow 182 * @engine: ptr to the crypto_engine for this flow 183 * @complete: completion for the current task on this flow 184 * @status: set to 1 by interrupt if task is done 185 * @t_phy: Physical address of task 186 * @tl: pointer to the current ce_task for this flow 187 * @stat_req: number of request done by this flow 188 */ 189 struct sun8i_ce_flow { 190 struct crypto_engine *engine; 191 struct completion complete; 192 int status; 193 dma_addr_t t_phy; 194 int timeout; 195 struct ce_task *tl; 196 #ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG 197 unsigned long stat_req; 198 #endif 199 }; 200 201 /* 202 * struct sun8i_ce_dev - main container for all this driver information 203 * @base: base address of CE 204 * @ceclks: clocks used by CE 205 * @reset: pointer to reset controller 206 * @dev: the platform device 207 * @mlock: Control access to device registers 208 * @rnglock: Control access to the RNG (dedicated channel 3) 209 * @chanlist: array of all flow 210 * @flow: flow to use in next request 211 * @variant: pointer to variant specific data 212 * @dbgfs_dir: Debugfs dentry for statistic directory 213 * @dbgfs_stats: Debugfs dentry for statistic counters 214 */ 215 struct sun8i_ce_dev { 216 void __iomem *base; 217 struct clk *ceclks[CE_MAX_CLOCKS]; 218 struct reset_control *reset; 219 struct device *dev; 220 struct mutex mlock; 221 struct mutex rnglock; 222 struct sun8i_ce_flow *chanlist; 223 atomic_t flow; 224 const struct ce_variant *variant; 225 #ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG 226 struct dentry *dbgfs_dir; 227 struct dentry *dbgfs_stats; 228 #endif 229 #ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_TRNG 230 struct hwrng trng; 231 #ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG 232 unsigned long hwrng_stat_req; 233 unsigned long hwrng_stat_bytes; 234 #endif 235 #endif 236 }; 237 238 /* 239 * struct sun8i_cipher_req_ctx - context for a skcipher request 240 * @op_dir: direction (encrypt vs decrypt) for this request 241 * @flow: the flow to use for this request 242 * @backup_iv: buffer which contain the next IV to store 243 * @bounce_iv: buffer which contain the IV 244 * @ivlen: size of bounce_iv 245 * @nr_sgs: The number of source SG (as given by dma_map_sg()) 246 * @nr_sgd: The number of destination SG (as given by dma_map_sg()) 247 * @addr_iv: The IV addr returned by dma_map_single, need to unmap later 248 * @addr_key: The key addr returned by dma_map_single, need to unmap later 249 * @fallback_req: request struct for invoking the fallback skcipher TFM 250 */ 251 struct sun8i_cipher_req_ctx { 252 u32 op_dir; 253 int flow; 254 void *backup_iv; 255 void *bounce_iv; 256 unsigned int ivlen; 257 int nr_sgs; 258 int nr_sgd; 259 dma_addr_t addr_iv; 260 dma_addr_t addr_key; 261 struct skcipher_request fallback_req; // keep at the end 262 }; 263 264 /* 265 * struct sun8i_cipher_tfm_ctx - context for a skcipher TFM 266 * @enginectx: crypto_engine used by this TFM 267 * @key: pointer to key data 268 * @keylen: len of the key 269 * @ce: pointer to the private data of driver handling this TFM 270 * @fallback_tfm: pointer to the fallback TFM 271 */ 272 struct sun8i_cipher_tfm_ctx { 273 struct crypto_engine_ctx enginectx; 274 u32 *key; 275 u32 keylen; 276 struct sun8i_ce_dev *ce; 277 struct crypto_skcipher *fallback_tfm; 278 }; 279 280 /* 281 * struct sun8i_ce_hash_tfm_ctx - context for an ahash TFM 282 * @enginectx: crypto_engine used by this TFM 283 * @ce: pointer to the private data of driver handling this TFM 284 * @fallback_tfm: pointer to the fallback TFM 285 */ 286 struct sun8i_ce_hash_tfm_ctx { 287 struct crypto_engine_ctx enginectx; 288 struct sun8i_ce_dev *ce; 289 struct crypto_ahash *fallback_tfm; 290 }; 291 292 /* 293 * struct sun8i_ce_hash_reqctx - context for an ahash request 294 * @fallback_req: pre-allocated fallback request 295 * @flow: the flow to use for this request 296 */ 297 struct sun8i_ce_hash_reqctx { 298 struct ahash_request fallback_req; 299 int flow; 300 }; 301 302 /* 303 * struct sun8i_ce_prng_ctx - context for PRNG TFM 304 * @seed: The seed to use 305 * @slen: The size of the seed 306 */ 307 struct sun8i_ce_rng_tfm_ctx { 308 void *seed; 309 unsigned int slen; 310 }; 311 312 /* 313 * struct sun8i_ce_alg_template - crypto_alg template 314 * @type: the CRYPTO_ALG_TYPE for this template 315 * @ce_algo_id: the CE_ID for this template 316 * @ce_blockmode: the type of block operation CE_ID 317 * @ce: pointer to the sun8i_ce_dev structure associated with 318 * this template 319 * @alg: one of sub struct must be used 320 * @stat_req: number of request done on this template 321 * @stat_fb: number of request which has fallbacked 322 * @stat_bytes: total data size done by this template 323 */ 324 struct sun8i_ce_alg_template { 325 u32 type; 326 u32 ce_algo_id; 327 u32 ce_blockmode; 328 struct sun8i_ce_dev *ce; 329 union { 330 struct skcipher_alg skcipher; 331 struct ahash_alg hash; 332 struct rng_alg rng; 333 } alg; 334 #ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG 335 unsigned long stat_req; 336 unsigned long stat_fb; 337 unsigned long stat_bytes; 338 #endif 339 }; 340 341 int sun8i_ce_enqueue(struct crypto_async_request *areq, u32 type); 342 343 int sun8i_ce_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, 344 unsigned int keylen); 345 int sun8i_ce_des3_setkey(struct crypto_skcipher *tfm, const u8 *key, 346 unsigned int keylen); 347 int sun8i_ce_cipher_init(struct crypto_tfm *tfm); 348 void sun8i_ce_cipher_exit(struct crypto_tfm *tfm); 349 int sun8i_ce_skdecrypt(struct skcipher_request *areq); 350 int sun8i_ce_skencrypt(struct skcipher_request *areq); 351 352 int sun8i_ce_get_engine_number(struct sun8i_ce_dev *ce); 353 354 int sun8i_ce_run_task(struct sun8i_ce_dev *ce, int flow, const char *name); 355 356 int sun8i_ce_hash_crainit(struct crypto_tfm *tfm); 357 void sun8i_ce_hash_craexit(struct crypto_tfm *tfm); 358 int sun8i_ce_hash_init(struct ahash_request *areq); 359 int sun8i_ce_hash_export(struct ahash_request *areq, void *out); 360 int sun8i_ce_hash_import(struct ahash_request *areq, const void *in); 361 int sun8i_ce_hash(struct ahash_request *areq); 362 int sun8i_ce_hash_final(struct ahash_request *areq); 363 int sun8i_ce_hash_update(struct ahash_request *areq); 364 int sun8i_ce_hash_finup(struct ahash_request *areq); 365 int sun8i_ce_hash_digest(struct ahash_request *areq); 366 int sun8i_ce_hash_run(struct crypto_engine *engine, void *breq); 367 368 int sun8i_ce_prng_generate(struct crypto_rng *tfm, const u8 *src, 369 unsigned int slen, u8 *dst, unsigned int dlen); 370 int sun8i_ce_prng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen); 371 void sun8i_ce_prng_exit(struct crypto_tfm *tfm); 372 int sun8i_ce_prng_init(struct crypto_tfm *tfm); 373 374 int sun8i_ce_hwrng_register(struct sun8i_ce_dev *ce); 375 void sun8i_ce_hwrng_unregister(struct sun8i_ce_dev *ce); 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