drivers/crypto/chelsio/chcr_crypto.h

   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__ */