chcr_crypto.h (10764B)
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 158static inline struct chcr_context *a_ctx(struct crypto_aead *tfm) 159{ 160 return crypto_aead_ctx(tfm); 161} 162 163static inline struct chcr_context *c_ctx(struct crypto_skcipher *tfm) 164{ 165 return crypto_skcipher_ctx(tfm); 166} 167 168static inline struct chcr_context *h_ctx(struct crypto_ahash *tfm) 169{ 170 return crypto_tfm_ctx(crypto_ahash_tfm(tfm)); 171} 172 173struct 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}; 182struct 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 196struct 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 206struct 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 214struct chcr_gcm_ctx { 215 u8 ghash_h[AEAD_H_SIZE]; 216}; 217 218struct 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 224struct __aead_ctx { 225 union { 226 DECLARE_FLEX_ARRAY(struct chcr_gcm_ctx, gcm); 227 DECLARE_FLEX_ARRAY(struct chcr_authenc_ctx, authenc); 228 }; 229}; 230 231struct chcr_aead_ctx { 232 __be32 key_ctx_hdr; 233 unsigned int enckey_len; 234 struct crypto_aead *sw_cipher; 235 u8 salt[MAX_SALT]; 236 u8 key[CHCR_AES_MAX_KEY_LEN]; 237 u8 nonce[4]; 238 u16 hmac_ctrl; 239 u16 mayverify; 240 struct __aead_ctx ctx[]; 241}; 242 243struct hmac_ctx { 244 struct crypto_shash *base_hash; 245 u8 ipad[CHCR_HASH_MAX_BLOCK_SIZE_128]; 246 u8 opad[CHCR_HASH_MAX_BLOCK_SIZE_128]; 247}; 248 249struct __crypto_ctx { 250 union { 251 DECLARE_FLEX_ARRAY(struct hmac_ctx, hmacctx); 252 DECLARE_FLEX_ARRAY(struct ablk_ctx, ablkctx); 253 DECLARE_FLEX_ARRAY(struct chcr_aead_ctx, aeadctx); 254 }; 255}; 256 257struct chcr_context { 258 struct chcr_dev *dev; 259 unsigned char rxq_perchan; 260 unsigned char txq_perchan; 261 unsigned int ntxq; 262 unsigned int nrxq; 263 struct completion cbc_aes_aio_done; 264 struct __crypto_ctx crypto_ctx[]; 265}; 266 267struct chcr_hctx_per_wr { 268 struct scatterlist *srcsg; 269 struct sk_buff *skb; 270 dma_addr_t dma_addr; 271 u32 dma_len; 272 unsigned int src_ofst; 273 unsigned int processed; 274 u32 result; 275 u8 is_sg_map; 276 u8 imm; 277 /*Final callback called. Driver cannot rely on nbytes to decide 278 * final call 279 */ 280 u8 isfinal; 281}; 282 283struct chcr_ahash_req_ctx { 284 struct chcr_hctx_per_wr hctx_wr; 285 u8 *reqbfr; 286 u8 *skbfr; 287 /* SKB which is being sent to the hardware for processing */ 288 u64 data_len; /* Data len till time */ 289 u16 txqidx; 290 u16 rxqidx; 291 u8 reqlen; 292 u8 partial_hash[CHCR_HASH_MAX_DIGEST_SIZE]; 293 u8 bfr1[CHCR_HASH_MAX_BLOCK_SIZE_128]; 294 u8 bfr2[CHCR_HASH_MAX_BLOCK_SIZE_128]; 295}; 296 297struct chcr_skcipher_req_ctx { 298 struct sk_buff *skb; 299 struct scatterlist *dstsg; 300 unsigned int processed; 301 unsigned int last_req_len; 302 unsigned int partial_req; 303 struct scatterlist *srcsg; 304 unsigned int src_ofst; 305 unsigned int dst_ofst; 306 unsigned int op; 307 u16 imm; 308 u8 iv[CHCR_MAX_CRYPTO_IV_LEN]; 309 u8 init_iv[CHCR_MAX_CRYPTO_IV_LEN]; 310 u16 txqidx; 311 u16 rxqidx; 312 struct skcipher_request fallback_req; // keep at the end 313}; 314 315struct chcr_alg_template { 316 u32 type; 317 u32 is_registered; 318 union { 319 struct skcipher_alg skcipher; 320 struct ahash_alg hash; 321 struct aead_alg aead; 322 } alg; 323}; 324 325typedef struct sk_buff *(*create_wr_t)(struct aead_request *req, 326 unsigned short qid, 327 int size); 328 329void chcr_verify_tag(struct aead_request *req, u8 *input, int *err); 330int chcr_aead_dma_map(struct device *dev, struct aead_request *req, 331 unsigned short op_type); 332void chcr_aead_dma_unmap(struct device *dev, struct aead_request *req, 333 unsigned short op_type); 334void chcr_add_aead_dst_ent(struct aead_request *req, 335 struct cpl_rx_phys_dsgl *phys_cpl, 336 unsigned short qid); 337void chcr_add_aead_src_ent(struct aead_request *req, struct ulptx_sgl *ulptx); 338void chcr_add_cipher_src_ent(struct skcipher_request *req, 339 void *ulptx, 340 struct cipher_wr_param *wrparam); 341int chcr_cipher_dma_map(struct device *dev, struct skcipher_request *req); 342void chcr_cipher_dma_unmap(struct device *dev, struct skcipher_request *req); 343void chcr_add_cipher_dst_ent(struct skcipher_request *req, 344 struct cpl_rx_phys_dsgl *phys_cpl, 345 struct cipher_wr_param *wrparam, 346 unsigned short qid); 347int sg_nents_len_skip(struct scatterlist *sg, u64 len, u64 skip); 348void chcr_add_hash_src_ent(struct ahash_request *req, struct ulptx_sgl *ulptx, 349 struct hash_wr_param *param); 350int chcr_hash_dma_map(struct device *dev, struct ahash_request *req); 351void chcr_hash_dma_unmap(struct device *dev, struct ahash_request *req); 352void chcr_aead_common_exit(struct aead_request *req); 353#endif /* __CHCR_CRYPTO_H__ */