LXR linux/drivers/crypto/chelsio/chcr

   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_AEAD_AUTHENC    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_AEAD_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_TYPE_HMAC (CRYPTO_ALG_TYPE_AHASH |\
 146                              CRYPTO_ALG_SUB_TYPE_HASH_HMAC)
 147
 148#define MAX_SCRATCH_PAD_SIZE    32
 149
 150#define CHCR_HASH_MAX_BLOCK_SIZE_64  64
 151#define CHCR_HASH_MAX_BLOCK_SIZE_128 128
 152#define CHCR_SG_SIZE 2048
 153
 154/* Aligned to 128 bit boundary */
 155
 156struct ablk_ctx {
 157        struct crypto_skcipher *sw_cipher;
 158        struct crypto_cipher *aes_generic;
 159        __be32 key_ctx_hdr;
 160        unsigned int enckey_len;
 161        unsigned char ciph_mode;
 162        u8 key[CHCR_AES_MAX_KEY_LEN];
 163        u8 nonce[4];
 164        u8 rrkey[AES_MAX_KEY_SIZE];
 165};
 166struct chcr_aead_reqctx {
 167        struct  sk_buff *skb;
 168        struct scatterlist *dst;
 169        struct scatterlist *newdstsg;
 170        struct scatterlist srcffwd[2];
 171        struct scatterlist dstffwd[2];
 172        short int dst_nents;
 173        u16 verify;
 174        u8 iv[CHCR_MAX_CRYPTO_IV_LEN];
 175        unsigned char scratch_pad[MAX_SCRATCH_PAD_SIZE];
 176};
 177
 178struct chcr_gcm_ctx {
 179        u8 ghash_h[AEAD_H_SIZE];
 180};
 181
 182struct chcr_authenc_ctx {
 183        u8 dec_rrkey[AES_MAX_KEY_SIZE];
 184        u8 h_iopad[2 * CHCR_HASH_MAX_DIGEST_SIZE];
 185        unsigned char auth_mode;
 186};
 187
 188struct __aead_ctx {
 189        struct chcr_gcm_ctx gcm[0];
 190        struct chcr_authenc_ctx authenc[0];
 191};
 192
 193
 194
 195struct chcr_aead_ctx {
 196        __be32 key_ctx_hdr;
 197        unsigned int enckey_len;
 198        struct crypto_skcipher *null;
 199        struct crypto_aead *sw_cipher;
 200        u8 salt[MAX_SALT];
 201        u8 key[CHCR_AES_MAX_KEY_LEN];
 202        u16 hmac_ctrl;
 203        u16 mayverify;
 204        struct  __aead_ctx ctx[0];
 205};
 206
 207
 208
 209struct hmac_ctx {
 210        struct crypto_shash *base_hash;
 211        u8 ipad[CHCR_HASH_MAX_BLOCK_SIZE_128];
 212        u8 opad[CHCR_HASH_MAX_BLOCK_SIZE_128];
 213};
 214
 215struct __crypto_ctx {
 216        struct hmac_ctx hmacctx[0];
 217        struct ablk_ctx ablkctx[0];
 218        struct chcr_aead_ctx aeadctx[0];
 219};
 220
 221struct chcr_context {
 222        struct chcr_dev *dev;
 223        unsigned char tx_qidx;
 224        unsigned char rx_qidx;
 225        struct __crypto_ctx crypto_ctx[0];
 226};
 227
 228struct chcr_ahash_req_ctx {
 229        u32 result;
 230        u8 bfr1[CHCR_HASH_MAX_BLOCK_SIZE_128];
 231        u8 bfr2[CHCR_HASH_MAX_BLOCK_SIZE_128];
 232        u8 *reqbfr;
 233        u8 *skbfr;
 234        u8 reqlen;
 235        /* DMA the partial hash in it */
 236        u8 partial_hash[CHCR_HASH_MAX_DIGEST_SIZE];
 237        u64 data_len;  /* Data len till time */
 238        /* SKB which is being sent to the hardware for processing */
 239        struct sk_buff *skb;
 240};
 241
 242struct chcr_blkcipher_req_ctx {
 243        struct sk_buff *skb;
 244        struct scatterlist srcffwd[2];
 245        struct scatterlist dstffwd[2];
 246        struct scatterlist *dstsg;
 247        struct scatterlist *dst;
 248        struct scatterlist *newdstsg;
 249        unsigned int processed;
 250        unsigned int op;
 251        short int dst_nents;
 252        u8 iv[CHCR_MAX_CRYPTO_IV_LEN];
 253};
 254
 255struct chcr_alg_template {
 256        u32 type;
 257        u32 is_registered;
 258        union {
 259                struct crypto_alg crypto;
 260                struct ahash_alg hash;
 261                struct aead_alg aead;
 262        } alg;
 263};
 264
 265struct chcr_req_ctx {
 266        union {
 267                struct ahash_request *ahash_req;
 268                struct aead_request *aead_req;
 269                struct ablkcipher_request *ablk_req;
 270        } req;
 271        union {
 272                struct chcr_ahash_req_ctx *ahash_ctx;
 273                struct chcr_aead_reqctx *reqctx;
 274                struct chcr_blkcipher_req_ctx *ablk_ctx;
 275        } ctx;
 276};
 277
 278struct sge_opaque_hdr {
 279        void *dev;
 280        dma_addr_t addr[MAX_SKB_FRAGS + 1];
 281};
 282
 283typedef struct sk_buff *(*create_wr_t)(struct aead_request *req,
 284                                       unsigned short qid,
 285                                       int size,
 286                                       unsigned short op_type);
 287
 288static int chcr_aead_op(struct aead_request *req_base,
 289                          unsigned short op_type,
 290                          int size,
 291                          create_wr_t create_wr_fn);
 292static inline int get_aead_subtype(struct crypto_aead *aead);
 293static int is_newsg(struct scatterlist *sgl, unsigned int *newents);
 294static struct scatterlist *alloc_new_sg(struct scatterlist *sgl,
 295                                        unsigned int nents);
 296static inline void free_new_sg(struct scatterlist *sgl);
 297static int chcr_handle_cipher_resp(struct ablkcipher_request *req,
 298                                   unsigned char *input, int err);
 299#endif /* __CHCR_CRYPTO_H__ */
 300