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 first_gd; /* first gather discriptor 68 used by this packet */ 69 u32 num_gd; /* number of gather discriptor 70 used by this packet */ 71 u32 first_sd; /* first scatter discriptor 72 used by this packet */ 73 u32 num_sd; /* number of scatter discriptors 74 used by this packet */ 75 struct dynamic_sa_ctl *sa_va; /* shadow sa */ 76 struct sa_state_record *sr_va; /* state record for shadow sa */ 77 u32 sr_pa; 78 struct scatterlist *dest_va; 79 struct crypto_async_request *async_req; /* base crypto request 80 for this packet */ 81 }; 82 83 struct crypto4xx_device { 84 struct crypto4xx_core_device *core_dev; 85 void __iomem *ce_base; 86 void __iomem *trng_base; 87 88 struct ce_pd *pdr; /* base address of packet descriptor ring */ 89 dma_addr_t pdr_pa; /* physical address of pdr_base_register */ 90 struct ce_gd *gdr; /* gather descriptor ring */ 91 dma_addr_t gdr_pa; /* physical address of gdr_base_register */ 92 struct ce_sd *sdr; /* scatter descriptor ring */ 93 dma_addr_t sdr_pa; /* physical address of sdr_base_register */ 94 void *scatter_buffer_va; 95 dma_addr_t scatter_buffer_pa; 96 97 union shadow_sa_buf *shadow_sa_pool; 98 dma_addr_t shadow_sa_pool_pa; 99 struct sa_state_record *shadow_sr_pool; 100 dma_addr_t shadow_sr_pool_pa; 101 u32 pdr_tail; 102 u32 pdr_head; 103 u32 gdr_tail; 104 u32 gdr_head; 105 u32 sdr_tail; 106 u32 sdr_head; 107 struct pd_uinfo *pdr_uinfo; 108 struct list_head alg_list; /* List of algorithm supported 109 by this device */ 110 struct ratelimit_state aead_ratelimit; 111 bool is_revb; 112 }; 113 114 struct crypto4xx_core_device { 115 struct device *device; 116 struct platform_device *ofdev; 117 struct crypto4xx_device *dev; 118 struct hwrng *trng; 119 u32 int_status; 120 u32 irq; 121 struct tasklet_struct tasklet; 122 spinlock_t lock; 123 struct mutex rng_lock; 124 }; 125 126 struct crypto4xx_ctx { 127 struct crypto4xx_device *dev; 128 struct dynamic_sa_ctl *sa_in; 129 struct dynamic_sa_ctl *sa_out; 130 __le32 iv_nonce; 131 u32 sa_len; 132 union { 133 struct crypto_sync_skcipher *cipher; 134 struct crypto_aead *aead; 135 } sw_cipher; 136 }; 137 138 struct crypto4xx_aead_reqctx { 139 struct scatterlist dst[2]; 140 }; 141 142 struct crypto4xx_alg_common { 143 u32 type; 144 union { 145 struct skcipher_alg cipher; 146 struct ahash_alg hash; 147 struct aead_alg aead; 148 struct rng_alg rng; 149 } u; 150 }; 151 152 struct crypto4xx_alg { 153 struct list_head entry; 154 struct crypto4xx_alg_common alg; 155 struct crypto4xx_device *dev; 156 }; 157 158 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size); 159 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx); 160 void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx); 161 int crypto4xx_build_pd(struct crypto_async_request *req, 162 struct crypto4xx_ctx *ctx, 163 struct scatterlist *src, 164 struct scatterlist *dst, 165 const unsigned int datalen, 166 const __le32 *iv, const u32 iv_len, 167 const struct dynamic_sa_ctl *sa, 168 const unsigned int sa_len, 169 const unsigned int assoclen, 170 struct scatterlist *dst_tmp); 171 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher, 172 const u8 *key, unsigned int keylen); 173 int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher, 174 const u8 *key, unsigned int keylen); 175 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher, 176 const u8 *key, unsigned int keylen); 177 int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher, 178 const u8 *key, unsigned int keylen); 179 int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher, 180 const u8 *key, unsigned int keylen); 181 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher, 182 const u8 *key, unsigned int keylen); 183 int crypto4xx_encrypt_ctr(struct skcipher_request *req); 184 int crypto4xx_decrypt_ctr(struct skcipher_request *req); 185 int crypto4xx_encrypt_iv(struct skcipher_request *req); 186 int crypto4xx_decrypt_iv(struct skcipher_request *req); 187 int crypto4xx_encrypt_noiv(struct skcipher_request *req); 188 int crypto4xx_decrypt_noiv(struct skcipher_request *req); 189 int crypto4xx_rfc3686_encrypt(struct skcipher_request *req); 190 int crypto4xx_rfc3686_decrypt(struct skcipher_request *req); 191 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm); 192 int crypto4xx_hash_digest(struct ahash_request *req); 193 int crypto4xx_hash_final(struct ahash_request *req); 194 int crypto4xx_hash_update(struct ahash_request *req); 195 int crypto4xx_hash_init(struct ahash_request *req); 196 197 /** 198 * Note: Only use this function to copy items that is word aligned. 199 */ 200 static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf, 201 size_t len) 202 { 203 for (; len >= 4; buf += 4, len -= 4) 204 *dst++ = __swab32p((u32 *) buf); 205 206 if (len) { 207 const u8 *tmp = (u8 *)buf; 208 209 switch (len) { 210 case 3: 211 *dst = (tmp[2] << 16) | 212 (tmp[1] << 8) | 213 tmp[0]; 214 break; 215 case 2: 216 *dst = (tmp[1] << 8) | 217 tmp[0]; 218 break; 219 case 1: 220 *dst = tmp[0]; 221 break; 222 default: 223 break; 224 } 225 } 226 } 227 228 static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf, 229 size_t len) 230 { 231 crypto4xx_memcpy_swab32(dst, buf, len); 232 } 233 234 static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf, 235 size_t len) 236 { 237 crypto4xx_memcpy_swab32((u32 *)dst, buf, len); 238 } 239 240 int crypto4xx_setauthsize_aead(struct crypto_aead *ciper, 241 unsigned int authsize); 242 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, 243 const u8 *key, unsigned int keylen); 244 int crypto4xx_encrypt_aes_ccm(struct aead_request *req); 245 int crypto4xx_decrypt_aes_ccm(struct aead_request *req); 246 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher, 247 const u8 *key, unsigned int keylen); 248 int crypto4xx_encrypt_aes_gcm(struct aead_request *req); 249 int crypto4xx_decrypt_aes_gcm(struct aead_request *req); 250 251 #endif 252