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 "crypto4xx_reg_def.h" 29 #include "crypto4xx_sa.h" 30 31 #define MODULE_NAME "crypto4xx" 32 33 #define PPC460SX_SDR0_SRST 0x201 34 #define PPC405EX_SDR0_SRST 0x200 35 #define PPC460EX_SDR0_SRST 0x201 36 #define PPC460EX_CE_RESET 0x08000000 37 #define PPC460SX_CE_RESET 0x20000000 38 #define PPC405EX_CE_RESET 0x00000008 39 40 #define CRYPTO4XX_CRYPTO_PRIORITY 300 41 #define PPC4XX_NUM_PD 256 42 #define PPC4XX_LAST_PD (PPC4XX_NUM_PD - 1) 43 #define PPC4XX_NUM_GD 1024 44 #define PPC4XX_LAST_GD (PPC4XX_NUM_GD - 1) 45 #define PPC4XX_NUM_SD 256 46 #define PPC4XX_LAST_SD (PPC4XX_NUM_SD - 1) 47 #define PPC4XX_SD_BUFFER_SIZE 2048 48 49 #define PD_ENTRY_BUSY BIT(1) 50 #define PD_ENTRY_INUSE BIT(0) 51 #define PD_ENTRY_FREE 0 52 #define ERING_WAS_FULL 0xffffffff 53 54 struct crypto4xx_device; 55 56 union shadow_sa_buf { 57 struct dynamic_sa_ctl sa; 58 59 /* alloc 256 bytes which is enough for any kind of dynamic sa */ 60 u8 buf[256]; 61 } __packed; 62 63 struct pd_uinfo { 64 struct crypto4xx_device *dev; 65 u32 state; 66 u32 using_sd; 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 char *name; 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 }; 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 }; 124 125 struct crypto4xx_ctx { 126 struct crypto4xx_device *dev; 127 struct dynamic_sa_ctl *sa_in; 128 struct dynamic_sa_ctl *sa_out; 129 __le32 iv_nonce; 130 u32 sa_len; 131 union { 132 struct crypto_aead *aead; 133 } sw_cipher; 134 }; 135 136 struct crypto4xx_alg_common { 137 u32 type; 138 union { 139 struct crypto_alg cipher; 140 struct ahash_alg hash; 141 struct aead_alg aead; 142 } u; 143 }; 144 145 struct crypto4xx_alg { 146 struct list_head entry; 147 struct crypto4xx_alg_common alg; 148 struct crypto4xx_device *dev; 149 }; 150 151 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size); 152 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx); 153 void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx); 154 int crypto4xx_build_pd(struct crypto_async_request *req, 155 struct crypto4xx_ctx *ctx, 156 struct scatterlist *src, 157 struct scatterlist *dst, 158 const unsigned int datalen, 159 const __le32 *iv, const u32 iv_len, 160 const struct dynamic_sa_ctl *sa, 161 const unsigned int sa_len, 162 const unsigned int assoclen); 163 int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher, 164 const u8 *key, unsigned int keylen); 165 int crypto4xx_setkey_aes_cfb(struct crypto_ablkcipher *cipher, 166 const u8 *key, unsigned int keylen); 167 int crypto4xx_setkey_aes_ecb(struct crypto_ablkcipher *cipher, 168 const u8 *key, unsigned int keylen); 169 int crypto4xx_setkey_aes_ofb(struct crypto_ablkcipher *cipher, 170 const u8 *key, unsigned int keylen); 171 int crypto4xx_setkey_rfc3686(struct crypto_ablkcipher *cipher, 172 const u8 *key, unsigned int keylen); 173 int crypto4xx_encrypt(struct ablkcipher_request *req); 174 int crypto4xx_decrypt(struct ablkcipher_request *req); 175 int crypto4xx_rfc3686_encrypt(struct ablkcipher_request *req); 176 int crypto4xx_rfc3686_decrypt(struct ablkcipher_request *req); 177 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm); 178 int crypto4xx_hash_digest(struct ahash_request *req); 179 int crypto4xx_hash_final(struct ahash_request *req); 180 int crypto4xx_hash_update(struct ahash_request *req); 181 int crypto4xx_hash_init(struct ahash_request *req); 182 183 /** 184 * Note: Only use this function to copy items that is word aligned. 185 */ 186 static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf, 187 size_t len) 188 { 189 for (; len >= 4; buf += 4, len -= 4) 190 *dst++ = __swab32p((u32 *) buf); 191 192 if (len) { 193 const u8 *tmp = (u8 *)buf; 194 195 switch (len) { 196 case 3: 197 *dst = (tmp[2] << 16) | 198 (tmp[1] << 8) | 199 tmp[0]; 200 break; 201 case 2: 202 *dst = (tmp[1] << 8) | 203 tmp[0]; 204 break; 205 case 1: 206 *dst = tmp[0]; 207 break; 208 default: 209 break; 210 } 211 } 212 } 213 214 static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf, 215 size_t len) 216 { 217 crypto4xx_memcpy_swab32(dst, buf, len); 218 } 219 220 static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf, 221 size_t len) 222 { 223 crypto4xx_memcpy_swab32((u32 *)dst, buf, len); 224 } 225 226 int crypto4xx_setauthsize_aead(struct crypto_aead *ciper, 227 unsigned int authsize); 228 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, 229 const u8 *key, unsigned int keylen); 230 int crypto4xx_encrypt_aes_ccm(struct aead_request *req); 231 int crypto4xx_decrypt_aes_ccm(struct aead_request *req); 232 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher, 233 const u8 *key, unsigned int keylen); 234 int crypto4xx_encrypt_aes_gcm(struct aead_request *req); 235 int crypto4xx_decrypt_aes_gcm(struct aead_request *req); 236 237 #endif 238