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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 | /* SPDX-License-Identifier: GPL-2.0 */ /* * sun8i-ss.h - hardware cryptographic offloader for * Allwinner A80/A83T SoC * * Copyright (C) 2016-2019 Corentin LABBE <clabbe.montjoie@gmail.com> */ #include <crypto/aes.h> #include <crypto/des.h> #include <crypto/engine.h> #include <crypto/rng.h> #include <crypto/skcipher.h> #include <linux/atomic.h> #include <linux/debugfs.h> #include <linux/crypto.h> #include <crypto/internal/hash.h> #include <crypto/md5.h> #include <crypto/sha1.h> #include <crypto/sha2.h> #define SS_START 1 #define SS_ENCRYPTION 0 #define SS_DECRYPTION BIT(6) #define SS_ALG_AES 0 #define SS_ALG_DES (1 << 2) #define SS_ALG_3DES (2 << 2) #define SS_ALG_MD5 (3 << 2) #define SS_ALG_PRNG (4 << 2) #define SS_ALG_SHA1 (6 << 2) #define SS_ALG_SHA224 (7 << 2) #define SS_ALG_SHA256 (8 << 2) #define SS_CTL_REG 0x00 #define SS_INT_CTL_REG 0x04 #define SS_INT_STA_REG 0x08 #define SS_KEY_ADR_REG 0x10 #define SS_IV_ADR_REG 0x18 #define SS_SRC_ADR_REG 0x20 #define SS_DST_ADR_REG 0x28 #define SS_LEN_ADR_REG 0x30 #define SS_ID_NOTSUPP 0xFF #define SS_ID_CIPHER_AES 0 #define SS_ID_CIPHER_DES 1 #define SS_ID_CIPHER_DES3 2 #define SS_ID_CIPHER_MAX 3 #define SS_ID_OP_ECB 0 #define SS_ID_OP_CBC 1 #define SS_ID_OP_MAX 2 #define SS_AES_128BITS 0 #define SS_AES_192BITS 1 #define SS_AES_256BITS 2 #define SS_OP_ECB 0 #define SS_OP_CBC (1 << 13) #define SS_ID_HASH_MD5 0 #define SS_ID_HASH_SHA1 1 #define SS_ID_HASH_SHA224 2 #define SS_ID_HASH_SHA256 3 #define SS_ID_HASH_MAX 4 #define SS_FLOW0 BIT(30) #define SS_FLOW1 BIT(31) #define SS_PRNG_CONTINUE BIT(18) #define MAX_SG 8 #define MAXFLOW 2 #define SS_MAX_CLOCKS 2 #define SS_DIE_ID_SHIFT 20 #define SS_DIE_ID_MASK 0x07 #define PRNG_DATA_SIZE (160 / 8) #define PRNG_SEED_SIZE DIV_ROUND_UP(175, 8) #define MAX_PAD_SIZE 4096 /* * struct ss_clock - Describe clocks used by sun8i-ss * @name: Name of clock needed by this variant * @freq: Frequency to set for each clock * @max_freq: Maximum frequency for each clock */ struct ss_clock { const char *name; unsigned long freq; unsigned long max_freq; }; /* * struct ss_variant - Describe SS capability for each variant hardware * @alg_cipher: list of supported ciphers. for each SS_ID_ this will give the * coresponding SS_ALG_XXX value * @alg_hash: list of supported hashes. for each SS_ID_ this will give the * corresponding SS_ALG_XXX value * @op_mode: list of supported block modes * @ss_clks: list of clock needed by this variant */ struct ss_variant { char alg_cipher[SS_ID_CIPHER_MAX]; char alg_hash[SS_ID_HASH_MAX]; u32 op_mode[SS_ID_OP_MAX]; struct ss_clock ss_clks[SS_MAX_CLOCKS]; }; struct sginfo { u32 addr; u32 len; }; /* * struct sun8i_ss_flow - Information used by each flow * @engine: ptr to the crypto_engine for this flow * @complete: completion for the current task on this flow * @status: set to 1 by interrupt if task is done * @stat_req: number of request done by this flow * @iv: list of IV to use for each step * @biv: buffer which contain the backuped IV * @pad: padding buffer for hash operations * @result: buffer for storing the result of hash operations */ struct sun8i_ss_flow { struct crypto_engine *engine; struct completion complete; int status; u8 *iv[MAX_SG]; u8 *biv; void *pad; void *result; #ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG unsigned long stat_req; #endif }; /* * struct sun8i_ss_dev - main container for all this driver information * @base: base address of SS * @ssclks: clocks used by SS * @reset: pointer to reset controller * @dev: the platform device * @mlock: Control access to device registers * @flows: array of all flow * @flow: flow to use in next request * @variant: pointer to variant specific data * @dbgfs_dir: Debugfs dentry for statistic directory * @dbgfs_stats: Debugfs dentry for statistic counters */ struct sun8i_ss_dev { void __iomem *base; struct clk *ssclks[SS_MAX_CLOCKS]; struct reset_control *reset; struct device *dev; struct mutex mlock; struct sun8i_ss_flow *flows; atomic_t flow; const struct ss_variant *variant; #ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG struct dentry *dbgfs_dir; struct dentry *dbgfs_stats; #endif }; /* * struct sun8i_cipher_req_ctx - context for a skcipher request * @t_src: list of mapped SGs with their size * @t_dst: list of mapped SGs with their size * @p_key: DMA address of the key * @p_iv: DMA address of the IVs * @niv: Number of IVs DMA mapped * @method: current algorithm for this request * @op_mode: op_mode for this request * @op_dir: direction (encrypt vs decrypt) for this request * @flow: the flow to use for this request * @ivlen: size of IVs * @keylen: keylen for this request * @fallback_req: request struct for invoking the fallback skcipher TFM */ struct sun8i_cipher_req_ctx { struct sginfo t_src[MAX_SG]; struct sginfo t_dst[MAX_SG]; u32 p_key; u32 p_iv[MAX_SG]; int niv; u32 method; u32 op_mode; u32 op_dir; int flow; unsigned int ivlen; unsigned int keylen; struct skcipher_request fallback_req; // keep at the end }; /* * struct sun8i_cipher_tfm_ctx - context for a skcipher TFM * @enginectx: crypto_engine used by this TFM * @key: pointer to key data * @keylen: len of the key * @ss: pointer to the private data of driver handling this TFM * @fallback_tfm: pointer to the fallback TFM * * enginectx must be the first element */ struct sun8i_cipher_tfm_ctx { struct crypto_engine_ctx enginectx; u32 *key; u32 keylen; struct sun8i_ss_dev *ss; struct crypto_skcipher *fallback_tfm; }; /* * struct sun8i_ss_prng_ctx - context for PRNG TFM * @seed: The seed to use * @slen: The size of the seed */ struct sun8i_ss_rng_tfm_ctx { void *seed; unsigned int slen; }; /* * struct sun8i_ss_hash_tfm_ctx - context for an ahash TFM * @enginectx: crypto_engine used by this TFM * @fallback_tfm: pointer to the fallback TFM * @ss: pointer to the private data of driver handling this TFM * * enginectx must be the first element */ struct sun8i_ss_hash_tfm_ctx { struct crypto_engine_ctx enginectx; struct crypto_ahash *fallback_tfm; struct sun8i_ss_dev *ss; u8 *ipad; u8 *opad; u8 key[SHA256_BLOCK_SIZE]; int keylen; }; /* * struct sun8i_ss_hash_reqctx - context for an ahash request * @t_src: list of DMA address and size for source SGs * @t_dst: list of DMA address and size for destination SGs * @fallback_req: pre-allocated fallback request * @method: the register value for the algorithm used by this request * @flow: the flow to use for this request */ struct sun8i_ss_hash_reqctx { struct sginfo t_src[MAX_SG]; struct sginfo t_dst[MAX_SG]; struct ahash_request fallback_req; u32 method; int flow; }; /* * struct sun8i_ss_alg_template - crypto_alg template * @type: the CRYPTO_ALG_TYPE for this template * @ss_algo_id: the SS_ID for this template * @ss_blockmode: the type of block operation SS_ID * @ss: pointer to the sun8i_ss_dev structure associated with * this template * @alg: one of sub struct must be used * @stat_req: number of request done on this template * @stat_fb: number of request which has fallbacked * @stat_bytes: total data size done by this template */ struct sun8i_ss_alg_template { u32 type; u32 ss_algo_id; u32 ss_blockmode; struct sun8i_ss_dev *ss; union { struct skcipher_alg skcipher; struct rng_alg rng; struct ahash_alg hash; } alg; unsigned long stat_req; unsigned long stat_fb; unsigned long stat_bytes; unsigned long stat_fb_len; unsigned long stat_fb_sglen; unsigned long stat_fb_align; unsigned long stat_fb_sgnum; char fbname[CRYPTO_MAX_ALG_NAME]; }; int sun8i_ss_enqueue(struct crypto_async_request *areq, u32 type); int sun8i_ss_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keylen); int sun8i_ss_des3_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keylen); int sun8i_ss_cipher_init(struct crypto_tfm *tfm); void sun8i_ss_cipher_exit(struct crypto_tfm *tfm); int sun8i_ss_skdecrypt(struct skcipher_request *areq); int sun8i_ss_skencrypt(struct skcipher_request *areq); int sun8i_ss_get_engine_number(struct sun8i_ss_dev *ss); int sun8i_ss_run_task(struct sun8i_ss_dev *ss, struct sun8i_cipher_req_ctx *rctx, const char *name); int sun8i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int dlen); int sun8i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen); int sun8i_ss_prng_init(struct crypto_tfm *tfm); void sun8i_ss_prng_exit(struct crypto_tfm *tfm); int sun8i_ss_hash_crainit(struct crypto_tfm *tfm); void sun8i_ss_hash_craexit(struct crypto_tfm *tfm); int sun8i_ss_hash_init(struct ahash_request *areq); int sun8i_ss_hash_export(struct ahash_request *areq, void *out); int sun8i_ss_hash_import(struct ahash_request *areq, const void *in); int sun8i_ss_hash_final(struct ahash_request *areq); int sun8i_ss_hash_update(struct ahash_request *areq); int sun8i_ss_hash_finup(struct ahash_request *areq); int sun8i_ss_hash_digest(struct ahash_request *areq); int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq); int sun8i_ss_hmac_setkey(struct crypto_ahash *ahash, const u8 *key, unsigned int keylen); |