1 /* 2 * This file is part of the Chelsio T6 Crypto driver for Linux. 3 * 4 * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 * 34 */ 35 36 #ifndef __CHCR_CRYPTO_H__ 37 #define __CHCR_CRYPTO_H__ 38 39 #define GHASH_BLOCK_SIZE 16 40 #define GHASH_DIGEST_SIZE 16 41 42 #define CCM_B0_SIZE 16 43 #define CCM_AAD_FIELD_SIZE 2 44 // 511 - 16(For IV) 45 #define T6_MAX_AAD_SIZE 495 46 47 48 /* Define following if h/w is not dropping the AAD and IV data before 49 * giving the processed data 50 */ 51 52 #define CHCR_CRA_PRIORITY 500 53 #define CHCR_AEAD_PRIORITY 6000 54 #define CHCR_AES_MAX_KEY_LEN (2 * (AES_MAX_KEY_SIZE)) /* consider xts */ 55 #define CHCR_MAX_CRYPTO_IV_LEN 16 /* AES IV len */ 56 57 #define CHCR_MAX_AUTHENC_AES_KEY_LEN 32 /* max aes key length*/ 58 #define CHCR_MAX_AUTHENC_SHA_KEY_LEN 128 /* max sha key length*/ 59 60 #define CHCR_GIVENCRYPT_OP 2 61 /* CPL/SCMD parameters */ 62 63 #define CHCR_ENCRYPT_OP 0 64 #define CHCR_DECRYPT_OP 1 65 66 #define CHCR_SCMD_SEQ_NO_CTRL_32BIT 1 67 #define CHCR_SCMD_SEQ_NO_CTRL_48BIT 2 68 #define CHCR_SCMD_SEQ_NO_CTRL_64BIT 3 69 70 #define CHCR_SCMD_PROTO_VERSION_GENERIC 4 71 72 #define CHCR_SCMD_AUTH_CTRL_AUTH_CIPHER 0 73 #define CHCR_SCMD_AUTH_CTRL_CIPHER_AUTH 1 74 75 #define CHCR_SCMD_CIPHER_MODE_NOP 0 76 #define CHCR_SCMD_CIPHER_MODE_AES_CBC 1 77 #define CHCR_SCMD_CIPHER_MODE_AES_GCM 2 78 #define CHCR_SCMD_CIPHER_MODE_AES_CTR 3 79 #define CHCR_SCMD_CIPHER_MODE_GENERIC_AES 4 80 #define CHCR_SCMD_CIPHER_MODE_AES_XTS 6 81 #define CHCR_SCMD_CIPHER_MODE_AES_CCM 7 82 83 #define CHCR_SCMD_AUTH_MODE_NOP 0 84 #define CHCR_SCMD_AUTH_MODE_SHA1 1 85 #define CHCR_SCMD_AUTH_MODE_SHA224 2 86 #define CHCR_SCMD_AUTH_MODE_SHA256 3 87 #define CHCR_SCMD_AUTH_MODE_GHASH 4 88 #define CHCR_SCMD_AUTH_MODE_SHA512_224 5 89 #define CHCR_SCMD_AUTH_MODE_SHA512_256 6 90 #define CHCR_SCMD_AUTH_MODE_SHA512_384 7 91 #define CHCR_SCMD_AUTH_MODE_SHA512_512 8 92 #define CHCR_SCMD_AUTH_MODE_CBCMAC 9 93 #define CHCR_SCMD_AUTH_MODE_CMAC 10 94 95 #define CHCR_SCMD_HMAC_CTRL_NOP 0 96 #define CHCR_SCMD_HMAC_CTRL_NO_TRUNC 1 97 #define CHCR_SCMD_HMAC_CTRL_TRUNC_RFC4366 2 98 #define CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT 3 99 #define CHCR_SCMD_HMAC_CTRL_PL1 4 100 #define CHCR_SCMD_HMAC_CTRL_PL2 5 101 #define CHCR_SCMD_HMAC_CTRL_PL3 6 102 #define CHCR_SCMD_HMAC_CTRL_DIV2 7 103 #define VERIFY_HW 0 104 #define VERIFY_SW 1 105 106 #define CHCR_SCMD_IVGEN_CTRL_HW 0 107 #define CHCR_SCMD_IVGEN_CTRL_SW 1 108 /* This are not really mac key size. They are intermediate values 109 * of sha engine and its size 110 */ 111 #define CHCR_KEYCTX_MAC_KEY_SIZE_128 0 112 #define CHCR_KEYCTX_MAC_KEY_SIZE_160 1 113 #define CHCR_KEYCTX_MAC_KEY_SIZE_192 2 114 #define CHCR_KEYCTX_MAC_KEY_SIZE_256 3 115 #define CHCR_KEYCTX_MAC_KEY_SIZE_512 4 116 #define CHCR_KEYCTX_CIPHER_KEY_SIZE_128 0 117 #define CHCR_KEYCTX_CIPHER_KEY_SIZE_192 1 118 #define CHCR_KEYCTX_CIPHER_KEY_SIZE_256 2 119 #define CHCR_KEYCTX_NO_KEY 15 120 121 #define CHCR_CPL_FW4_PLD_IV_OFFSET (5 * 64) /* bytes. flt #5 and #6 */ 122 #define CHCR_CPL_FW4_PLD_HASH_RESULT_OFFSET (7 * 64) /* bytes. flt #7 */ 123 #define CHCR_CPL_FW4_PLD_DATA_SIZE (4 * 64) /* bytes. flt #4 to #7 */ 124 125 #define KEY_CONTEXT_HDR_SALT_AND_PAD 16 126 #define flits_to_bytes(x) (x * 8) 127 128 #define IV_NOP 0 129 #define IV_IMMEDIATE 1 130 #define IV_DSGL 2 131 132 #define AEAD_H_SIZE 16 133 134 #define CRYPTO_ALG_SUB_TYPE_MASK 0x0f000000 135 #define CRYPTO_ALG_SUB_TYPE_HASH_HMAC 0x01000000 136 #define CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106 0x02000000 137 #define CRYPTO_ALG_SUB_TYPE_AEAD_GCM 0x03000000 138 #define CRYPTO_ALG_SUB_TYPE_CBC_SHA 0x04000000 139 #define CRYPTO_ALG_SUB_TYPE_AEAD_CCM 0x05000000 140 #define CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309 0x06000000 141 #define CRYPTO_ALG_SUB_TYPE_CBC_NULL 0x07000000 142 #define CRYPTO_ALG_SUB_TYPE_CTR 0x08000000 143 #define CRYPTO_ALG_SUB_TYPE_CTR_RFC3686 0x09000000 144 #define CRYPTO_ALG_SUB_TYPE_XTS 0x0a000000 145 #define CRYPTO_ALG_SUB_TYPE_CBC 0x0b000000 146 #define CRYPTO_ALG_SUB_TYPE_CTR_SHA 0x0c000000 147 #define CRYPTO_ALG_SUB_TYPE_CTR_NULL 0x0d000000 148 #define CRYPTO_ALG_TYPE_HMAC (CRYPTO_ALG_TYPE_AHASH |\ 149 CRYPTO_ALG_SUB_TYPE_HASH_HMAC) 150 151 #define MAX_SCRATCH_PAD_SIZE 32 152 153 #define CHCR_HASH_MAX_BLOCK_SIZE_64 64 154 #define CHCR_HASH_MAX_BLOCK_SIZE_128 128 155 #define CHCR_SRC_SG_SIZE (0x10000 - sizeof(int)) 156 #define CHCR_DST_SG_SIZE 2048 157 158 static inline struct chcr_context *a_ctx(struct crypto_aead *tfm) 159 { 160 return crypto_aead_ctx(tfm); 161 } 162 163 static inline struct chcr_context *c_ctx(struct crypto_skcipher *tfm) 164 { 165 return crypto_skcipher_ctx(tfm); 166 } 167 168 static inline struct chcr_context *h_ctx(struct crypto_ahash *tfm) 169 { 170 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 171 } 172 173 struct ablk_ctx { 174 struct crypto_skcipher *sw_cipher; 175 __be32 key_ctx_hdr; 176 unsigned int enckey_len; 177 unsigned char ciph_mode; 178 u8 key[CHCR_AES_MAX_KEY_LEN]; 179 u8 nonce[4]; 180 u8 rrkey[AES_MAX_KEY_SIZE]; 181 }; 182 struct chcr_aead_reqctx { 183 struct sk_buff *skb; 184 dma_addr_t iv_dma; 185 dma_addr_t b0_dma; 186 unsigned int b0_len; 187 unsigned int op; 188 u16 imm; 189 u16 verify; 190 u16 txqidx; 191 u16 rxqidx; 192 u8 iv[CHCR_MAX_CRYPTO_IV_LEN + MAX_SCRATCH_PAD_SIZE]; 193 u8 *scratch_pad; 194 }; 195 196 struct ulptx_walk { 197 struct ulptx_sgl *sgl; 198 unsigned int nents; 199 unsigned int pair_idx; 200 unsigned int last_sg_len; 201 struct scatterlist *last_sg; 202 struct ulptx_sge_pair *pair; 203 204 }; 205 206 struct dsgl_walk { 207 unsigned int nents; 208 unsigned int last_sg_len; 209 struct scatterlist *last_sg; 210 struct cpl_rx_phys_dsgl *dsgl; 211 struct phys_sge_pairs *to; 212 }; 213 214 struct chcr_gcm_ctx { 215 u8 ghash_h[AEAD_H_SIZE]; 216 }; 217 218 struct chcr_authenc_ctx { 219 u8 dec_rrkey[AES_MAX_KEY_SIZE]; 220 u8 h_iopad[2 * CHCR_HASH_MAX_DIGEST_SIZE]; 221 unsigned char auth_mode; 222 }; 223 224 struct __aead_ctx { 225 struct chcr_gcm_ctx gcm[0]; 226 struct chcr_authenc_ctx authenc[]; 227 }; 228 229 struct chcr_aead_ctx { 230 __be32 key_ctx_hdr; 231 unsigned int enckey_len; 232 struct crypto_aead *sw_cipher; 233 u8 salt[MAX_SALT]; 234 u8 key[CHCR_AES_MAX_KEY_LEN]; 235 u8 nonce[4]; 236 u16 hmac_ctrl; 237 u16 mayverify; 238 struct __aead_ctx ctx[]; 239 }; 240 241 struct hmac_ctx { 242 struct crypto_shash *base_hash; 243 u8 ipad[CHCR_HASH_MAX_BLOCK_SIZE_128]; 244 u8 opad[CHCR_HASH_MAX_BLOCK_SIZE_128]; 245 }; 246 247 struct __crypto_ctx { 248 struct hmac_ctx hmacctx[0]; 249 struct ablk_ctx ablkctx[0]; 250 struct chcr_aead_ctx aeadctx[]; 251 }; 252 253 struct chcr_context { 254 struct chcr_dev *dev; 255 unsigned char rxq_perchan; 256 unsigned char txq_perchan; 257 unsigned int ntxq; 258 unsigned int nrxq; 259 struct completion cbc_aes_aio_done; 260 struct __crypto_ctx crypto_ctx[]; 261 }; 262 263 struct chcr_hctx_per_wr { 264 struct scatterlist *srcsg; 265 struct sk_buff *skb; 266 dma_addr_t dma_addr; 267 u32 dma_len; 268 unsigned int src_ofst; 269 unsigned int processed; 270 u32 result; 271 u8 is_sg_map; 272 u8 imm; 273 /*Final callback called. Driver cannot rely on nbytes to decide 274 * final call 275 */ 276 u8 isfinal; 277 }; 278 279 struct chcr_ahash_req_ctx { 280 struct chcr_hctx_per_wr hctx_wr; 281 u8 *reqbfr; 282 u8 *skbfr; 283 /* SKB which is being sent to the hardware for processing */ 284 u64 data_len; /* Data len till time */ 285 u16 txqidx; 286 u16 rxqidx; 287 u8 reqlen; 288 u8 partial_hash[CHCR_HASH_MAX_DIGEST_SIZE]; 289 u8 bfr1[CHCR_HASH_MAX_BLOCK_SIZE_128]; 290 u8 bfr2[CHCR_HASH_MAX_BLOCK_SIZE_128]; 291 }; 292 293 struct chcr_skcipher_req_ctx { 294 struct sk_buff *skb; 295 struct scatterlist *dstsg; 296 unsigned int processed; 297 unsigned int last_req_len; 298 unsigned int partial_req; 299 struct scatterlist *srcsg; 300 unsigned int src_ofst; 301 unsigned int dst_ofst; 302 unsigned int op; 303 u16 imm; 304 u8 iv[CHCR_MAX_CRYPTO_IV_LEN]; 305 u8 init_iv[CHCR_MAX_CRYPTO_IV_LEN]; 306 u16 txqidx; 307 u16 rxqidx; 308 struct skcipher_request fallback_req; // keep at the end 309 }; 310 311 struct chcr_alg_template { 312 u32 type; 313 u32 is_registered; 314 union { 315 struct skcipher_alg skcipher; 316 struct ahash_alg hash; 317 struct aead_alg aead; 318 } alg; 319 }; 320 321 typedef struct sk_buff *(*create_wr_t)(struct aead_request *req, 322 unsigned short qid, 323 int size); 324 325 void chcr_verify_tag(struct aead_request *req, u8 *input, int *err); 326 int chcr_aead_dma_map(struct device *dev, struct aead_request *req, 327 unsigned short op_type); 328 void chcr_aead_dma_unmap(struct device *dev, struct aead_request *req, 329 unsigned short op_type); 330 void chcr_add_aead_dst_ent(struct aead_request *req, 331 struct cpl_rx_phys_dsgl *phys_cpl, 332 unsigned short qid); 333 void chcr_add_aead_src_ent(struct aead_request *req, struct ulptx_sgl *ulptx); 334 void chcr_add_cipher_src_ent(struct skcipher_request *req, 335 void *ulptx, 336 struct cipher_wr_param *wrparam); 337 int chcr_cipher_dma_map(struct device *dev, struct skcipher_request *req); 338 void chcr_cipher_dma_unmap(struct device *dev, struct skcipher_request *req); 339 void chcr_add_cipher_dst_ent(struct skcipher_request *req, 340 struct cpl_rx_phys_dsgl *phys_cpl, 341 struct cipher_wr_param *wrparam, 342 unsigned short qid); 343 int sg_nents_len_skip(struct scatterlist *sg, u64 len, u64 skip); 344 void chcr_add_hash_src_ent(struct ahash_request *req, struct ulptx_sgl *ulptx, 345 struct hash_wr_param *param); 346 int chcr_hash_dma_map(struct device *dev, struct ahash_request *req); 347 void chcr_hash_dma_unmap(struct device *dev, struct ahash_request *req); 348 void chcr_aead_common_exit(struct aead_request *req); 349 #endif /* __CHCR_CRYPTO_H__ */ 350