drivers/crypto/amcc/crypto4xx_core.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /**
   3  * AMCC SoC PPC4xx Crypto Driver
   4  *
   5  * Copyright (c) 2008 Applied Micro Circuits Corporation.
   6  * All rights reserved. James Hsiao <jhsiao@amcc.com>
   7  *
   8  * This is the header file for AMCC Crypto offload Linux device driver for
   9  * use with Linux CryptoAPI.
  10
  11  */
  12
  13 #ifndef __CRYPTO4XX_CORE_H__
  14 #define __CRYPTO4XX_CORE_H__
  15
  16 #include <linux/ratelimit.h>
  17 #include <linux/mutex.h>
  18 #include <linux/scatterlist.h>
  19 #include <crypto/internal/hash.h>
  20 #include <crypto/internal/aead.h>
  21 #include <crypto/internal/rng.h>
  22 #include <crypto/internal/skcipher.h>
  23 #include "crypto4xx_reg_def.h"
  24 #include "crypto4xx_sa.h"
  25
  26 #define PPC460SX_SDR0_SRST                      0x201
  27 #define PPC405EX_SDR0_SRST                      0x200
  28 #define PPC460EX_SDR0_SRST                      0x201
  29 #define PPC460EX_CE_RESET                       0x08000000
  30 #define PPC460SX_CE_RESET                       0x20000000
  31 #define PPC405EX_CE_RESET                       0x00000008
  32
  33 #define CRYPTO4XX_CRYPTO_PRIORITY               300
  34 #define PPC4XX_NUM_PD                           256
  35 #define PPC4XX_LAST_PD                          (PPC4XX_NUM_PD - 1)
  36 #define PPC4XX_NUM_GD                           1024
  37 #define PPC4XX_LAST_GD                          (PPC4XX_NUM_GD - 1)
  38 #define PPC4XX_NUM_SD                           256
  39 #define PPC4XX_LAST_SD                          (PPC4XX_NUM_SD - 1)
  40 #define PPC4XX_SD_BUFFER_SIZE                   2048
  41
  42 #define PD_ENTRY_BUSY                           BIT(1)
  43 #define PD_ENTRY_INUSE                          BIT(0)
  44 #define PD_ENTRY_FREE                           0
  45 #define ERING_WAS_FULL                          0xffffffff
  46
  47 struct crypto4xx_device;
  48
  49 union shadow_sa_buf {
  50         struct dynamic_sa_ctl sa;
  51
  52         /* alloc 256 bytes which is enough for any kind of dynamic sa */
  53         u8 buf[256];
  54 } __packed;
  55
  56 struct pd_uinfo {
  57         struct crypto4xx_device *dev;
  58         u32   state;
  59         u32 first_gd;           /* first gather discriptor
  60                                 used by this packet */
  61         u32 num_gd;             /* number of gather discriptor
  62                                 used by this packet */
  63         u32 first_sd;           /* first scatter discriptor
  64                                 used by this packet */
  65         u32 num_sd;             /* number of scatter discriptors
  66                                 used by this packet */
  67         struct dynamic_sa_ctl *sa_va;   /* shadow sa */
  68         struct sa_state_record *sr_va;  /* state record for shadow sa */
  69         u32 sr_pa;
  70         struct scatterlist *dest_va;
  71         struct crypto_async_request *async_req;         /* base crypto request
  72                                                         for this packet */
  73 };
  74
  75 struct crypto4xx_device {
  76         struct crypto4xx_core_device *core_dev;
  77         void __iomem *ce_base;
  78         void __iomem *trng_base;
  79
  80         struct ce_pd *pdr;      /* base address of packet descriptor ring */
  81         dma_addr_t pdr_pa;      /* physical address of pdr_base_register */
  82         struct ce_gd *gdr;      /* gather descriptor ring */
  83         dma_addr_t gdr_pa;      /* physical address of gdr_base_register */
  84         struct ce_sd *sdr;      /* scatter descriptor ring */
  85         dma_addr_t sdr_pa;      /* physical address of sdr_base_register */
  86         void *scatter_buffer_va;
  87         dma_addr_t scatter_buffer_pa;
  88
  89         union shadow_sa_buf *shadow_sa_pool;
  90         dma_addr_t shadow_sa_pool_pa;
  91         struct sa_state_record *shadow_sr_pool;
  92         dma_addr_t shadow_sr_pool_pa;
  93         u32 pdr_tail;
  94         u32 pdr_head;
  95         u32 gdr_tail;
  96         u32 gdr_head;
  97         u32 sdr_tail;
  98         u32 sdr_head;
  99         struct pd_uinfo *pdr_uinfo;
 100         struct list_head alg_list;      /* List of algorithm supported
 101                                         by this device */
 102         struct ratelimit_state aead_ratelimit;
 103         bool is_revb;
 104 };
 105
 106 struct crypto4xx_core_device {
 107         struct device *device;
 108         struct platform_device *ofdev;
 109         struct crypto4xx_device *dev;
 110         struct hwrng *trng;
 111         u32 int_status;
 112         u32 irq;
 113         struct tasklet_struct tasklet;
 114         spinlock_t lock;
 115         struct mutex rng_lock;
 116 };
 117
 118 struct crypto4xx_ctx {
 119         struct crypto4xx_device *dev;
 120         struct dynamic_sa_ctl *sa_in;
 121         struct dynamic_sa_ctl *sa_out;
 122         __le32 iv_nonce;
 123         u32 sa_len;
 124         union {
 125                 struct crypto_sync_skcipher *cipher;
 126                 struct crypto_aead *aead;
 127         } sw_cipher;
 128 };
 129
 130 struct crypto4xx_aead_reqctx {
 131         struct scatterlist dst[2];
 132 };
 133
 134 struct crypto4xx_alg_common {
 135         u32 type;
 136         union {
 137                 struct skcipher_alg cipher;
 138                 struct ahash_alg hash;
 139                 struct aead_alg aead;
 140                 struct rng_alg rng;
 141         } u;
 142 };
 143
 144 struct crypto4xx_alg {
 145         struct list_head  entry;
 146         struct crypto4xx_alg_common alg;
 147         struct crypto4xx_device *dev;
 148 };
 149
 150 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
 151 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
 152 void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
 153 int crypto4xx_build_pd(struct crypto_async_request *req,
 154                        struct crypto4xx_ctx *ctx,
 155                        struct scatterlist *src,
 156                        struct scatterlist *dst,
 157                        const unsigned int datalen,
 158                        const __le32 *iv, const u32 iv_len,
 159                        const struct dynamic_sa_ctl *sa,
 160                        const unsigned int sa_len,
 161                        const unsigned int assoclen,
 162                        struct scatterlist *dst_tmp);
 163 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
 164                              const u8 *key, unsigned int keylen);
 165 int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher,
 166                              const u8 *key, unsigned int keylen);
 167 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
 168                              const u8 *key, unsigned int keylen);
 169 int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
 170                              const u8 *key, unsigned int keylen);
 171 int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
 172                              const u8 *key, unsigned int keylen);
 173 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
 174                              const u8 *key, unsigned int keylen);
 175 int crypto4xx_encrypt_ctr(struct skcipher_request *req);
 176 int crypto4xx_decrypt_ctr(struct skcipher_request *req);
 177 int crypto4xx_encrypt_iv_stream(struct skcipher_request *req);
 178 int crypto4xx_decrypt_iv_stream(struct skcipher_request *req);
 179 int crypto4xx_encrypt_iv_block(struct skcipher_request *req);
 180 int crypto4xx_decrypt_iv_block(struct skcipher_request *req);
 181 int crypto4xx_encrypt_noiv_block(struct skcipher_request *req);
 182 int crypto4xx_decrypt_noiv_block(struct skcipher_request *req);
 183 int crypto4xx_rfc3686_encrypt(struct skcipher_request *req);
 184 int crypto4xx_rfc3686_decrypt(struct skcipher_request *req);
 185 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
 186 int crypto4xx_hash_digest(struct ahash_request *req);
 187 int crypto4xx_hash_final(struct ahash_request *req);
 188 int crypto4xx_hash_update(struct ahash_request *req);
 189 int crypto4xx_hash_init(struct ahash_request *req);
 190
 191 /**
 192  * Note: Only use this function to copy items that is word aligned.
 193  */
 194 static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf,
 195                                            size_t len)
 196 {
 197         for (; len >= 4; buf += 4, len -= 4)
 198                 *dst++ = __swab32p((u32 *) buf);
 199
 200         if (len) {
 201                 const u8 *tmp = (u8 *)buf;
 202
 203                 switch (len) {
 204                 case 3:
 205                         *dst = (tmp[2] << 16) |
 206                                (tmp[1] << 8) |
 207                                tmp[0];
 208                         break;
 209                 case 2:
 210                         *dst = (tmp[1] << 8) |
 211                                tmp[0];
 212                         break;
 213                 case 1:
 214                         *dst = tmp[0];
 215                         break;
 216                 default:
 217                         break;
 218                 }
 219         }
 220 }
 221
 222 static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf,
 223                                               size_t len)
 224 {
 225         crypto4xx_memcpy_swab32(dst, buf, len);
 226 }
 227
 228 static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf,
 229                                             size_t len)
 230 {
 231         crypto4xx_memcpy_swab32((u32 *)dst, buf, len);
 232 }
 233
 234 int crypto4xx_setauthsize_aead(struct crypto_aead *ciper,
 235                                unsigned int authsize);
 236 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher,
 237                              const u8 *key, unsigned int keylen);
 238 int crypto4xx_encrypt_aes_ccm(struct aead_request *req);
 239 int crypto4xx_decrypt_aes_ccm(struct aead_request *req);
 240 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
 241                              const u8 *key, unsigned int keylen);
 242 int crypto4xx_encrypt_aes_gcm(struct aead_request *req);
 243 int crypto4xx_decrypt_aes_gcm(struct aead_request *req);
 244
 245 #endif