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