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 <crypto/internal/hash.h> 27 #include <crypto/internal/aead.h> 28 #include <crypto/internal/skcipher.h> 29 #include "crypto4xx_reg_def.h" 30 #include "crypto4xx_sa.h" 31 32 #define PPC460SX_SDR0_SRST 0x201 33 #define PPC405EX_SDR0_SRST 0x200 34 #define PPC460EX_SDR0_SRST 0x201 35 #define PPC460EX_CE_RESET 0x08000000 36 #define PPC460SX_CE_RESET 0x20000000 37 #define PPC405EX_CE_RESET 0x00000008 38 39 #define CRYPTO4XX_CRYPTO_PRIORITY 300 40 #define PPC4XX_NUM_PD 256 41 #define PPC4XX_LAST_PD (PPC4XX_NUM_PD - 1) 42 #define PPC4XX_NUM_GD 1024 43 #define PPC4XX_LAST_GD (PPC4XX_NUM_GD - 1) 44 #define PPC4XX_NUM_SD 256 45 #define PPC4XX_LAST_SD (PPC4XX_NUM_SD - 1) 46 #define PPC4XX_SD_BUFFER_SIZE 2048 47 48 #define PD_ENTRY_BUSY BIT(1) 49 #define PD_ENTRY_INUSE BIT(0) 50 #define PD_ENTRY_FREE 0 51 #define ERING_WAS_FULL 0xffffffff 52 53 struct crypto4xx_device; 54 55 union shadow_sa_buf { 56 struct dynamic_sa_ctl sa; 57 58 /* alloc 256 bytes which is enough for any kind of dynamic sa */ 59 u8 buf[256]; 60 } __packed; 61 62 struct pd_uinfo { 63 struct crypto4xx_device *dev; 64 u32 state; 65 u32 using_sd; 66 u32 first_gd; /* first gather discriptor 67 used by this packet */ 68 u32 num_gd; /* number of gather discriptor 69 used by this packet */ 70 u32 first_sd; /* first scatter discriptor 71 used by this packet */ 72 u32 num_sd; /* number of scatter discriptors 73 used by this packet */ 74 struct dynamic_sa_ctl *sa_va; /* shadow sa */ 75 struct sa_state_record *sr_va; /* state record for shadow sa */ 76 u32 sr_pa; 77 struct scatterlist *dest_va; 78 struct crypto_async_request *async_req; /* base crypto request 79 for this packet */ 80 }; 81 82 struct crypto4xx_device { 83 struct crypto4xx_core_device *core_dev; 84 void __iomem *ce_base; 85 void __iomem *trng_base; 86 87 struct ce_pd *pdr; /* base address of packet descriptor ring */ 88 dma_addr_t pdr_pa; /* physical address of pdr_base_register */ 89 struct ce_gd *gdr; /* gather descriptor ring */ 90 dma_addr_t gdr_pa; /* physical address of gdr_base_register */ 91 struct ce_sd *sdr; /* scatter descriptor ring */ 92 dma_addr_t sdr_pa; /* physical address of sdr_base_register */ 93 void *scatter_buffer_va; 94 dma_addr_t scatter_buffer_pa; 95 96 union shadow_sa_buf *shadow_sa_pool; 97 dma_addr_t shadow_sa_pool_pa; 98 struct sa_state_record *shadow_sr_pool; 99 dma_addr_t shadow_sr_pool_pa; 100 u32 pdr_tail; 101 u32 pdr_head; 102 u32 gdr_tail; 103 u32 gdr_head; 104 u32 sdr_tail; 105 u32 sdr_head; 106 struct pd_uinfo *pdr_uinfo; 107 struct list_head alg_list; /* List of algorithm supported 108 by this device */ 109 struct ratelimit_state aead_ratelimit; 110 bool is_revb; 111 }; 112 113 struct crypto4xx_core_device { 114 struct device *device; 115 struct platform_device *ofdev; 116 struct crypto4xx_device *dev; 117 struct hwrng *trng; 118 u32 int_status; 119 u32 irq; 120 struct tasklet_struct tasklet; 121 spinlock_t lock; 122 }; 123 124 struct crypto4xx_ctx { 125 struct crypto4xx_device *dev; 126 struct dynamic_sa_ctl *sa_in; 127 struct dynamic_sa_ctl *sa_out; 128 __le32 iv_nonce; 129 u32 sa_len; 130 union { 131 struct crypto_skcipher *cipher; 132 struct crypto_aead *aead; 133 } sw_cipher; 134 }; 135 136 struct crypto4xx_aead_reqctx { 137 struct scatterlist dst[2]; 138 }; 139 140 struct crypto4xx_alg_common { 141 u32 type; 142 union { 143 struct skcipher_alg cipher; 144 struct ahash_alg hash; 145 struct aead_alg aead; 146 } u; 147 }; 148 149 struct crypto4xx_alg { 150 struct list_head entry; 151 struct crypto4xx_alg_common alg; 152 struct crypto4xx_device *dev; 153 }; 154 155 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size); 156 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx); 157 void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx); 158 int crypto4xx_build_pd(struct crypto_async_request *req, 159 struct crypto4xx_ctx *ctx, 160 struct scatterlist *src, 161 struct scatterlist *dst, 162 const unsigned int datalen, 163 const __le32 *iv, const u32 iv_len, 164 const struct dynamic_sa_ctl *sa, 165 const unsigned int sa_len, 166 const unsigned int assoclen, 167 struct scatterlist *dst_tmp); 168 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher, 169 const u8 *key, unsigned int keylen); 170 int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher, 171 const u8 *key, unsigned int keylen); 172 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher, 173 const u8 *key, unsigned int keylen); 174 int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher, 175 const u8 *key, unsigned int keylen); 176 int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher, 177 const u8 *key, unsigned int keylen); 178 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher, 179 const u8 *key, unsigned int keylen); 180 int crypto4xx_encrypt_ctr(struct skcipher_request *req); 181 int crypto4xx_decrypt_ctr(struct skcipher_request *req); 182 int crypto4xx_encrypt_iv(struct skcipher_request *req); 183 int crypto4xx_decrypt_iv(struct skcipher_request *req); 184 int crypto4xx_encrypt_noiv(struct skcipher_request *req); 185 int crypto4xx_decrypt_noiv(struct skcipher_request *req); 186 int crypto4xx_rfc3686_encrypt(struct skcipher_request *req); 187 int crypto4xx_rfc3686_decrypt(struct skcipher_request *req); 188 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm); 189 int crypto4xx_hash_digest(struct ahash_request *req); 190 int crypto4xx_hash_final(struct ahash_request *req); 191 int crypto4xx_hash_update(struct ahash_request *req); 192 int crypto4xx_hash_init(struct ahash_request *req); 193 194 /** 195 * Note: Only use this function to copy items that is word aligned. 196 */ 197 static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf, 198 size_t len) 199 { 200 for (; len >= 4; buf += 4, len -= 4) 201 *dst++ = __swab32p((u32 *) buf); 202 203 if (len) { 204 const u8 *tmp = (u8 *)buf; 205 206 switch (len) { 207 case 3: 208 *dst = (tmp[2] << 16) | 209 (tmp[1] << 8) | 210 tmp[0]; 211 break; 212 case 2: 213 *dst = (tmp[1] << 8) | 214 tmp[0]; 215 break; 216 case 1: 217 *dst = tmp[0]; 218 break; 219 default: 220 break; 221 } 222 } 223 } 224 225 static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf, 226 size_t len) 227 { 228 crypto4xx_memcpy_swab32(dst, buf, len); 229 } 230 231 static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf, 232 size_t len) 233 { 234 crypto4xx_memcpy_swab32((u32 *)dst, buf, len); 235 } 236 237 int crypto4xx_setauthsize_aead(struct crypto_aead *ciper, 238 unsigned int authsize); 239 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, 240 const u8 *key, unsigned int keylen); 241 int crypto4xx_encrypt_aes_ccm(struct aead_request *req); 242 int crypto4xx_decrypt_aes_ccm(struct aead_request *req); 243 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher, 244 const u8 *key, unsigned int keylen); 245 int crypto4xx_encrypt_aes_gcm(struct aead_request *req); 246 int crypto4xx_decrypt_aes_gcm(struct aead_request *req); 247 248 #endif 249