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 #define T6_MAX_AAD_SIZE 511 45 46 47 /* Define following if h/w is not dropping the AAD and IV data before 48 * giving the processed data 49 */ 50 51 #define CHCR_CRA_PRIORITY 500 52 #define CHCR_AEAD_PRIORITY 6000 53 #define CHCR_AES_MAX_KEY_LEN (2 * (AES_MAX_KEY_SIZE)) /* consider xts */ 54 #define CHCR_MAX_CRYPTO_IV_LEN 16 /* AES IV len */ 55 56 #define CHCR_MAX_AUTHENC_AES_KEY_LEN 32 /* max aes key length*/ 57 #define CHCR_MAX_AUTHENC_SHA_KEY_LEN 128 /* max sha key length*/ 58 59 #define CHCR_GIVENCRYPT_OP 2 60 /* CPL/SCMD parameters */ 61 62 #define CHCR_ENCRYPT_OP 0 63 #define CHCR_DECRYPT_OP 1 64 65 #define CHCR_SCMD_SEQ_NO_CTRL_32BIT 1 66 #define CHCR_SCMD_SEQ_NO_CTRL_48BIT 2 67 #define CHCR_SCMD_SEQ_NO_CTRL_64BIT 3 68 69 #define CHCR_SCMD_PROTO_VERSION_GENERIC 4 70 71 #define CHCR_SCMD_AUTH_CTRL_AUTH_CIPHER 0 72 #define CHCR_SCMD_AUTH_CTRL_CIPHER_AUTH 1 73 74 #define CHCR_SCMD_CIPHER_MODE_NOP 0 75 #define CHCR_SCMD_CIPHER_MODE_AES_CBC 1 76 #define CHCR_SCMD_CIPHER_MODE_AES_GCM 2 77 #define CHCR_SCMD_CIPHER_MODE_AES_CTR 3 78 #define CHCR_SCMD_CIPHER_MODE_GENERIC_AES 4 79 #define CHCR_SCMD_CIPHER_MODE_AES_XTS 6 80 #define CHCR_SCMD_CIPHER_MODE_AES_CCM 7 81 82 #define CHCR_SCMD_AUTH_MODE_NOP 0 83 #define CHCR_SCMD_AUTH_MODE_SHA1 1 84 #define CHCR_SCMD_AUTH_MODE_SHA224 2 85 #define CHCR_SCMD_AUTH_MODE_SHA256 3 86 #define CHCR_SCMD_AUTH_MODE_GHASH 4 87 #define CHCR_SCMD_AUTH_MODE_SHA512_224 5 88 #define CHCR_SCMD_AUTH_MODE_SHA512_256 6 89 #define CHCR_SCMD_AUTH_MODE_SHA512_384 7 90 #define CHCR_SCMD_AUTH_MODE_SHA512_512 8 91 #define CHCR_SCMD_AUTH_MODE_CBCMAC 9 92 #define CHCR_SCMD_AUTH_MODE_CMAC 10 93 94 #define CHCR_SCMD_HMAC_CTRL_NOP 0 95 #define CHCR_SCMD_HMAC_CTRL_NO_TRUNC 1 96 #define CHCR_SCMD_HMAC_CTRL_TRUNC_RFC4366 2 97 #define CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT 3 98 #define CHCR_SCMD_HMAC_CTRL_PL1 4 99 #define CHCR_SCMD_HMAC_CTRL_PL2 5 100 #define CHCR_SCMD_HMAC_CTRL_PL3 6 101 #define CHCR_SCMD_HMAC_CTRL_DIV2 7 102 #define VERIFY_HW 0 103 #define VERIFY_SW 1 104 105 #define CHCR_SCMD_IVGEN_CTRL_HW 0 106 #define CHCR_SCMD_IVGEN_CTRL_SW 1 107 /* This are not really mac key size. They are intermediate values 108 * of sha engine and its size 109 */ 110 #define CHCR_KEYCTX_MAC_KEY_SIZE_128 0 111 #define CHCR_KEYCTX_MAC_KEY_SIZE_160 1 112 #define CHCR_KEYCTX_MAC_KEY_SIZE_192 2 113 #define CHCR_KEYCTX_MAC_KEY_SIZE_256 3 114 #define CHCR_KEYCTX_MAC_KEY_SIZE_512 4 115 #define CHCR_KEYCTX_CIPHER_KEY_SIZE_128 0 116 #define CHCR_KEYCTX_CIPHER_KEY_SIZE_192 1 117 #define CHCR_KEYCTX_CIPHER_KEY_SIZE_256 2 118 #define CHCR_KEYCTX_NO_KEY 15 119 120 #define CHCR_CPL_FW4_PLD_IV_OFFSET (5 * 64) /* bytes. flt #5 and #6 */ 121 #define CHCR_CPL_FW4_PLD_HASH_RESULT_OFFSET (7 * 64) /* bytes. flt #7 */ 122 #define CHCR_CPL_FW4_PLD_DATA_SIZE (4 * 64) /* bytes. flt #4 to #7 */ 123 124 #define KEY_CONTEXT_HDR_SALT_AND_PAD 16 125 #define flits_to_bytes(x) (x * 8) 126 127 #define IV_NOP 0 128 #define IV_IMMEDIATE 1 129 #define IV_DSGL 2 130 131 #define AEAD_H_SIZE 16 132 133 #define CRYPTO_ALG_SUB_TYPE_MASK 0x0f000000 134 #define CRYPTO_ALG_SUB_TYPE_HASH_HMAC 0x01000000 135 #define CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106 0x02000000 136 #define CRYPTO_ALG_SUB_TYPE_AEAD_GCM 0x03000000 137 #define CRYPTO_ALG_SUB_TYPE_CBC_SHA 0x04000000 138 #define CRYPTO_ALG_SUB_TYPE_AEAD_CCM 0x05000000 139 #define CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309 0x06000000 140 #define CRYPTO_ALG_SUB_TYPE_CBC_NULL 0x07000000 141 #define CRYPTO_ALG_SUB_TYPE_CTR 0x08000000 142 #define CRYPTO_ALG_SUB_TYPE_CTR_RFC3686 0x09000000 143 #define CRYPTO_ALG_SUB_TYPE_XTS 0x0a000000 144 #define CRYPTO_ALG_SUB_TYPE_CBC 0x0b000000 145 #define CRYPTO_ALG_SUB_TYPE_CTR_SHA 0x0c000000 146 #define CRYPTO_ALG_SUB_TYPE_CTR_NULL 0x0d000000 147 #define CRYPTO_ALG_TYPE_HMAC (CRYPTO_ALG_TYPE_AHASH |\ 148 CRYPTO_ALG_SUB_TYPE_HASH_HMAC) 149 150 #define MAX_SCRATCH_PAD_SIZE 32 151 152 #define CHCR_HASH_MAX_BLOCK_SIZE_64 64 153 #define CHCR_HASH_MAX_BLOCK_SIZE_128 128 154 #define CHCR_SRC_SG_SIZE (0x10000 - sizeof(int)) 155 #define CHCR_DST_SG_SIZE 2048 156 157 static inline struct chcr_context *a_ctx(struct crypto_aead *tfm) 158 { 159 return crypto_aead_ctx(tfm); 160 } 161 162 static inline struct chcr_context *c_ctx(struct crypto_ablkcipher *tfm) 163 { 164 return crypto_ablkcipher_ctx(tfm); 165 } 166 167 static inline struct chcr_context *h_ctx(struct crypto_ahash *tfm) 168 { 169 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 170 } 171 172 struct ablk_ctx { 173 struct crypto_skcipher *sw_cipher; 174 struct crypto_cipher *aes_generic; 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 short int aad_nents; 189 short int src_nents; 190 short int dst_nents; 191 u16 imm; 192 u16 verify; 193 u8 iv[CHCR_MAX_CRYPTO_IV_LEN + MAX_SCRATCH_PAD_SIZE]; 194 u8 *scratch_pad; 195 }; 196 197 struct ulptx_walk { 198 struct ulptx_sgl *sgl; 199 unsigned int nents; 200 unsigned int pair_idx; 201 unsigned int last_sg_len; 202 struct scatterlist *last_sg; 203 struct ulptx_sge_pair *pair; 204 205 }; 206 207 struct dsgl_walk { 208 unsigned int nents; 209 unsigned int last_sg_len; 210 struct scatterlist *last_sg; 211 struct cpl_rx_phys_dsgl *dsgl; 212 struct phys_sge_pairs *to; 213 }; 214 215 struct chcr_gcm_ctx { 216 u8 ghash_h[AEAD_H_SIZE]; 217 }; 218 219 struct chcr_authenc_ctx { 220 u8 dec_rrkey[AES_MAX_KEY_SIZE]; 221 u8 h_iopad[2 * CHCR_HASH_MAX_DIGEST_SIZE]; 222 unsigned char auth_mode; 223 }; 224 225 struct __aead_ctx { 226 struct chcr_gcm_ctx gcm[0]; 227 struct chcr_authenc_ctx authenc[0]; 228 }; 229 230 struct chcr_aead_ctx { 231 __be32 key_ctx_hdr; 232 unsigned int enckey_len; 233 struct crypto_aead *sw_cipher; 234 u8 salt[MAX_SALT]; 235 u8 key[CHCR_AES_MAX_KEY_LEN]; 236 u8 nonce[4]; 237 u16 hmac_ctrl; 238 u16 mayverify; 239 struct __aead_ctx ctx[0]; 240 }; 241 242 struct hmac_ctx { 243 struct crypto_shash *base_hash; 244 u8 ipad[CHCR_HASH_MAX_BLOCK_SIZE_128]; 245 u8 opad[CHCR_HASH_MAX_BLOCK_SIZE_128]; 246 }; 247 248 struct __crypto_ctx { 249 struct hmac_ctx hmacctx[0]; 250 struct ablk_ctx ablkctx[0]; 251 struct chcr_aead_ctx aeadctx[0]; 252 }; 253 254 struct chcr_context { 255 struct chcr_dev *dev; 256 unsigned char tx_qidx; 257 unsigned char rx_qidx; 258 struct __crypto_ctx crypto_ctx[0]; 259 }; 260 261 struct chcr_hctx_per_wr { 262 struct scatterlist *srcsg; 263 struct sk_buff *skb; 264 dma_addr_t dma_addr; 265 u32 dma_len; 266 unsigned int src_ofst; 267 unsigned int processed; 268 u32 result; 269 u8 is_sg_map; 270 u8 imm; 271 /*Final callback called. Driver cannot rely on nbytes to decide 272 * final call 273 */ 274 u8 isfinal; 275 }; 276 277 struct chcr_ahash_req_ctx { 278 struct chcr_hctx_per_wr hctx_wr; 279 u8 *reqbfr; 280 u8 *skbfr; 281 /* SKB which is being sent to the hardware for processing */ 282 u64 data_len; /* Data len till time */ 283 u8 reqlen; 284 u8 partial_hash[CHCR_HASH_MAX_DIGEST_SIZE]; 285 u8 bfr1[CHCR_HASH_MAX_BLOCK_SIZE_128]; 286 u8 bfr2[CHCR_HASH_MAX_BLOCK_SIZE_128]; 287 }; 288 289 struct chcr_blkcipher_req_ctx { 290 struct sk_buff *skb; 291 struct scatterlist *dstsg; 292 unsigned int processed; 293 unsigned int last_req_len; 294 struct scatterlist *srcsg; 295 unsigned int src_ofst; 296 unsigned int dst_ofst; 297 unsigned int op; 298 u16 imm; 299 u8 iv[CHCR_MAX_CRYPTO_IV_LEN]; 300 }; 301 302 struct chcr_alg_template { 303 u32 type; 304 u32 is_registered; 305 union { 306 struct crypto_alg crypto; 307 struct ahash_alg hash; 308 struct aead_alg aead; 309 } alg; 310 }; 311 312 typedef struct sk_buff *(*create_wr_t)(struct aead_request *req, 313 unsigned short qid, 314 int size); 315 316 void chcr_verify_tag(struct aead_request *req, u8 *input, int *err); 317 int chcr_aead_dma_map(struct device *dev, struct aead_request *req, 318 unsigned short op_type); 319 void chcr_aead_dma_unmap(struct device *dev, struct aead_request *req, 320 unsigned short op_type); 321 void chcr_add_aead_dst_ent(struct aead_request *req, 322 struct cpl_rx_phys_dsgl *phys_cpl, 323 unsigned int assoclen, 324 unsigned short qid); 325 void chcr_add_aead_src_ent(struct aead_request *req, struct ulptx_sgl *ulptx, 326 unsigned int assoclen); 327 void chcr_add_cipher_src_ent(struct ablkcipher_request *req, 328 void *ulptx, 329 struct cipher_wr_param *wrparam); 330 int chcr_cipher_dma_map(struct device *dev, struct ablkcipher_request *req); 331 void chcr_cipher_dma_unmap(struct device *dev, struct ablkcipher_request *req); 332 void chcr_add_cipher_dst_ent(struct ablkcipher_request *req, 333 struct cpl_rx_phys_dsgl *phys_cpl, 334 struct cipher_wr_param *wrparam, 335 unsigned short qid); 336 int sg_nents_len_skip(struct scatterlist *sg, u64 len, u64 skip); 337 void chcr_add_hash_src_ent(struct ahash_request *req, struct ulptx_sgl *ulptx, 338 struct hash_wr_param *param); 339 int chcr_hash_dma_map(struct device *dev, struct ahash_request *req); 340 void chcr_hash_dma_unmap(struct device *dev, struct ahash_request *req); 341 void chcr_aead_common_exit(struct aead_request *req); 342 #endif /* __CHCR_CRYPTO_H__ */ 343