drivers/crypto/amcc/crypto4xx_core.h

   1 /**
   2  * AMCC SoC PPC4xx Crypto Driver
   3  *
   4  * Copyright (c) 2008 Applied Micro Circuits Corporation.
   5  * All rights reserved. James Hsiao <jhsiao@amcc.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * This is the header file for AMCC Crypto offload Linux device driver for
  18  * use with Linux CryptoAPI.
  19
  20  */
  21
  22 #ifndef __CRYPTO4XX_CORE_H__
  23 #define __CRYPTO4XX_CORE_H__
  24
  25 #include <linux/ratelimit.h>
  26 #include <linux/mutex.h>
  27 #include <crypto/internal/hash.h>
  28 #include <crypto/internal/aead.h>
  29 #include <crypto/internal/rng.h>
  30 #include <crypto/internal/skcipher.h>
  31 #include "crypto4xx_reg_def.h"
  32 #include "crypto4xx_sa.h"
  33
  34 #define PPC460SX_SDR0_SRST                      0x201
  35 #define PPC405EX_SDR0_SRST                      0x200
  36 #define PPC460EX_SDR0_SRST                      0x201
  37 #define PPC460EX_CE_RESET                       0x08000000
  38 #define PPC460SX_CE_RESET                       0x20000000
  39 #define PPC405EX_CE_RESET                       0x00000008
  40
  41 #define CRYPTO4XX_CRYPTO_PRIORITY               300
  42 #define PPC4XX_NUM_PD                           256
  43 #define PPC4XX_LAST_PD                          (PPC4XX_NUM_PD - 1)
  44 #define PPC4XX_NUM_GD                           1024
  45 #define PPC4XX_LAST_GD                          (PPC4XX_NUM_GD - 1)
  46 #define PPC4XX_NUM_SD                           256
  47 #define PPC4XX_LAST_SD                          (PPC4XX_NUM_SD - 1)
  48 #define PPC4XX_SD_BUFFER_SIZE                   2048
  49
  50 #define PD_ENTRY_BUSY                           BIT(1)
  51 #define PD_ENTRY_INUSE                          BIT(0)
  52 #define PD_ENTRY_FREE                           0
  53 #define ERING_WAS_FULL                          0xffffffff
  54
  55 struct crypto4xx_device;
  56
  57 union shadow_sa_buf {
  58         struct dynamic_sa_ctl sa;
  59
  60         /* alloc 256 bytes which is enough for any kind of dynamic sa */
  61         u8 buf[256];
  62 } __packed;
  63
  64 struct pd_uinfo {
  65         struct crypto4xx_device *dev;
  66         u32   state;
  67         u32 using_sd;
  68         u32 first_gd;           /* first gather discriptor
  69                                 used by this packet */
  70         u32 num_gd;             /* number of gather discriptor
  71                                 used by this packet */
  72         u32 first_sd;           /* first scatter discriptor
  73                                 used by this packet */
  74         u32 num_sd;             /* number of scatter discriptors
  75                                 used by this packet */
  76         struct dynamic_sa_ctl *sa_va;   /* shadow sa */
  77         struct sa_state_record *sr_va;  /* state record for shadow sa */
  78         u32 sr_pa;
  79         struct scatterlist *dest_va;
  80         struct crypto_async_request *async_req;         /* base crypto request
  81                                                         for this packet */
  82 };
  83
  84 struct crypto4xx_device {
  85         struct crypto4xx_core_device *core_dev;
  86         void __iomem *ce_base;
  87         void __iomem *trng_base;
  88
  89         struct ce_pd *pdr;      /* base address of packet descriptor ring */
  90         dma_addr_t pdr_pa;      /* physical address of pdr_base_register */
  91         struct ce_gd *gdr;      /* gather descriptor ring */
  92         dma_addr_t gdr_pa;      /* physical address of gdr_base_register */
  93         struct ce_sd *sdr;      /* scatter descriptor ring */
  94         dma_addr_t sdr_pa;      /* physical address of sdr_base_register */
  95         void *scatter_buffer_va;
  96         dma_addr_t scatter_buffer_pa;
  97
  98         union shadow_sa_buf *shadow_sa_pool;
  99         dma_addr_t shadow_sa_pool_pa;
 100         struct sa_state_record *shadow_sr_pool;
 101         dma_addr_t shadow_sr_pool_pa;
 102         u32 pdr_tail;
 103         u32 pdr_head;
 104         u32 gdr_tail;
 105         u32 gdr_head;
 106         u32 sdr_tail;
 107         u32 sdr_head;
 108         struct pd_uinfo *pdr_uinfo;
 109         struct list_head alg_list;      /* List of algorithm supported
 110                                         by this device */
 111         struct ratelimit_state aead_ratelimit;
 112         bool is_revb;
 113 };
 114
 115 struct crypto4xx_core_device {
 116         struct device *device;
 117         struct platform_device *ofdev;
 118         struct crypto4xx_device *dev;
 119         struct hwrng *trng;
 120         u32 int_status;
 121         u32 irq;
 122         struct tasklet_struct tasklet;
 123         spinlock_t lock;
 124         struct mutex rng_lock;
 125 };
 126
 127 struct crypto4xx_ctx {
 128         struct crypto4xx_device *dev;
 129         struct dynamic_sa_ctl *sa_in;
 130         struct dynamic_sa_ctl *sa_out;
 131         __le32 iv_nonce;
 132         u32 sa_len;
 133         union {
 134                 struct crypto_skcipher *cipher;
 135                 struct crypto_aead *aead;
 136         } sw_cipher;
 137 };
 138
 139 struct crypto4xx_aead_reqctx {
 140         struct scatterlist dst[2];
 141 };
 142
 143 struct crypto4xx_alg_common {
 144         u32 type;
 145         union {
 146                 struct skcipher_alg cipher;
 147                 struct ahash_alg hash;
 148                 struct aead_alg aead;
 149                 struct rng_alg rng;
 150         } u;
 151 };
 152
 153 struct crypto4xx_alg {
 154         struct list_head  entry;
 155         struct crypto4xx_alg_common alg;
 156         struct crypto4xx_device *dev;
 157 };
 158
 159 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
 160 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
 161 void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
 162 int crypto4xx_build_pd(struct crypto_async_request *req,
 163                        struct crypto4xx_ctx *ctx,
 164                        struct scatterlist *src,
 165                        struct scatterlist *dst,
 166                        const unsigned int datalen,
 167                        const __le32 *iv, const u32 iv_len,
 168                        const struct dynamic_sa_ctl *sa,
 169                        const unsigned int sa_len,
 170                        const unsigned int assoclen,
 171                        struct scatterlist *dst_tmp);
 172 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
 173                              const u8 *key, unsigned int keylen);
 174 int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher,
 175                              const u8 *key, unsigned int keylen);
 176 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
 177                              const u8 *key, unsigned int keylen);
 178 int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
 179                              const u8 *key, unsigned int keylen);
 180 int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
 181                              const u8 *key, unsigned int keylen);
 182 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
 183                              const u8 *key, unsigned int keylen);
 184 int crypto4xx_encrypt_ctr(struct skcipher_request *req);
 185 int crypto4xx_decrypt_ctr(struct skcipher_request *req);
 186 int crypto4xx_encrypt_iv(struct skcipher_request *req);
 187 int crypto4xx_decrypt_iv(struct skcipher_request *req);
 188 int crypto4xx_encrypt_noiv(struct skcipher_request *req);
 189 int crypto4xx_decrypt_noiv(struct skcipher_request *req);
 190 int crypto4xx_rfc3686_encrypt(struct skcipher_request *req);
 191 int crypto4xx_rfc3686_decrypt(struct skcipher_request *req);
 192 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
 193 int crypto4xx_hash_digest(struct ahash_request *req);
 194 int crypto4xx_hash_final(struct ahash_request *req);
 195 int crypto4xx_hash_update(struct ahash_request *req);
 196 int crypto4xx_hash_init(struct ahash_request *req);
 197
 198 /**
 199  * Note: Only use this function to copy items that is word aligned.
 200  */
 201 static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf,
 202                                            size_t len)
 203 {
 204         for (; len >= 4; buf += 4, len -= 4)
 205                 *dst++ = __swab32p((u32 *) buf);
 206
 207         if (len) {
 208                 const u8 *tmp = (u8 *)buf;
 209
 210                 switch (len) {
 211                 case 3:
 212                         *dst = (tmp[2] << 16) |
 213                                (tmp[1] << 8) |
 214                                tmp[0];
 215                         break;
 216                 case 2:
 217                         *dst = (tmp[1] << 8) |
 218                                tmp[0];
 219                         break;
 220                 case 1:
 221                         *dst = tmp[0];
 222                         break;
 223                 default:
 224                         break;
 225                 }
 226         }
 227 }
 228
 229 static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf,
 230                                               size_t len)
 231 {
 232         crypto4xx_memcpy_swab32(dst, buf, len);
 233 }
 234
 235 static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf,
 236                                             size_t len)
 237 {
 238         crypto4xx_memcpy_swab32((u32 *)dst, buf, len);
 239 }
 240
 241 int crypto4xx_setauthsize_aead(struct crypto_aead *ciper,
 242                                unsigned int authsize);
 243 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher,
 244                              const u8 *key, unsigned int keylen);
 245 int crypto4xx_encrypt_aes_ccm(struct aead_request *req);
 246 int crypto4xx_decrypt_aes_ccm(struct aead_request *req);
 247 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
 248                              const u8 *key, unsigned int keylen);
 249 int crypto4xx_encrypt_aes_gcm(struct aead_request *req);
 250 int crypto4xx_decrypt_aes_gcm(struct aead_request *req);
 251
 252 #endif