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 <crypto/internal/hash.h> 26 27 #define MODULE_NAME "crypto4xx" 28 29 #define PPC460SX_SDR0_SRST 0x201 30 #define PPC405EX_SDR0_SRST 0x200 31 #define PPC460EX_SDR0_SRST 0x201 32 #define PPC460EX_CE_RESET 0x08000000 33 #define PPC460SX_CE_RESET 0x20000000 34 #define PPC405EX_CE_RESET 0x00000008 35 36 #define CRYPTO4XX_CRYPTO_PRIORITY 300 37 #define PPC4XX_LAST_PD 63 38 #define PPC4XX_NUM_PD 64 39 #define PPC4XX_LAST_GD 1023 40 #define PPC4XX_NUM_GD 1024 41 #define PPC4XX_LAST_SD 63 42 #define PPC4XX_NUM_SD 64 43 #define PPC4XX_SD_BUFFER_SIZE 2048 44 45 #define PD_ENTRY_INUSE 1 46 #define PD_ENTRY_FREE 0 47 #define ERING_WAS_FULL 0xffffffff 48 49 struct crypto4xx_device; 50 51 struct pd_uinfo { 52 struct crypto4xx_device *dev; 53 u32 state; 54 u32 using_sd; 55 u32 first_gd; /* first gather discriptor 56 used by this packet */ 57 u32 num_gd; /* number of gather discriptor 58 used by this packet */ 59 u32 first_sd; /* first scatter discriptor 60 used by this packet */ 61 u32 num_sd; /* number of scatter discriptors 62 used by this packet */ 63 void *sa_va; /* shadow sa, when using cp from ctx->sa */ 64 u32 sa_pa; 65 void *sr_va; /* state record for shadow sa */ 66 u32 sr_pa; 67 struct scatterlist *dest_va; 68 struct crypto_async_request *async_req; /* base crypto request 69 for this packet */ 70 }; 71 72 struct crypto4xx_device { 73 struct crypto4xx_core_device *core_dev; 74 char *name; 75 u64 ce_phy_address; 76 void __iomem *ce_base; 77 void __iomem *trng_base; 78 79 void *pdr; /* base address of packet 80 descriptor ring */ 81 dma_addr_t pdr_pa; /* physical address used to 82 program ce pdr_base_register */ 83 void *gdr; /* gather descriptor ring */ 84 dma_addr_t gdr_pa; /* physical address used to 85 program ce gdr_base_register */ 86 void *sdr; /* scatter descriptor ring */ 87 dma_addr_t sdr_pa; /* physical address used to 88 program ce sdr_base_register */ 89 void *scatter_buffer_va; 90 dma_addr_t scatter_buffer_pa; 91 u32 scatter_buffer_size; 92 93 void *shadow_sa_pool; /* pool of memory for sa in pd_uinfo */ 94 dma_addr_t shadow_sa_pool_pa; 95 void *shadow_sr_pool; /* pool of memory for sr in pd_uinfo */ 96 dma_addr_t shadow_sr_pool_pa; 97 u32 pdr_tail; 98 u32 pdr_head; 99 u32 gdr_tail; 100 u32 gdr_head; 101 u32 sdr_tail; 102 u32 sdr_head; 103 void *pdr_uinfo; 104 struct list_head alg_list; /* List of algorithm supported 105 by this device */ 106 }; 107 108 struct crypto4xx_core_device { 109 struct device *device; 110 struct platform_device *ofdev; 111 struct crypto4xx_device *dev; 112 struct hwrng *trng; 113 u32 int_status; 114 u32 irq; 115 struct tasklet_struct tasklet; 116 spinlock_t lock; 117 }; 118 119 struct crypto4xx_ctx { 120 struct crypto4xx_device *dev; 121 void *sa_in; 122 dma_addr_t sa_in_dma_addr; 123 void *sa_out; 124 dma_addr_t sa_out_dma_addr; 125 void *state_record; 126 dma_addr_t state_record_dma_addr; 127 u32 sa_len; 128 u32 offset_to_sr_ptr; /* offset to state ptr, in dynamic sa */ 129 u32 direction; 130 u32 next_hdr; 131 u32 save_iv; 132 u32 pd_ctl_len; 133 u32 pd_ctl; 134 u32 bypass; 135 u32 is_hash; 136 u32 hash_final; 137 }; 138 139 struct crypto4xx_req_ctx { 140 struct crypto4xx_device *dev; /* Device in which 141 operation to send to */ 142 void *sa; 143 u32 sa_dma_addr; 144 u16 sa_len; 145 }; 146 147 struct crypto4xx_alg_common { 148 u32 type; 149 union { 150 struct crypto_alg cipher; 151 struct ahash_alg hash; 152 } u; 153 }; 154 155 struct crypto4xx_alg { 156 struct list_head entry; 157 struct crypto4xx_alg_common alg; 158 struct crypto4xx_device *dev; 159 }; 160 161 static inline struct crypto4xx_alg *crypto_alg_to_crypto4xx_alg( 162 struct crypto_alg *x) 163 { 164 switch (x->cra_flags & CRYPTO_ALG_TYPE_MASK) { 165 case CRYPTO_ALG_TYPE_AHASH: 166 return container_of(__crypto_ahash_alg(x), 167 struct crypto4xx_alg, alg.u.hash); 168 } 169 170 return container_of(x, struct crypto4xx_alg, alg.u.cipher); 171 } 172 173 extern int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size); 174 extern void crypto4xx_free_sa(struct crypto4xx_ctx *ctx); 175 extern u32 crypto4xx_alloc_sa_rctx(struct crypto4xx_ctx *ctx, 176 struct crypto4xx_ctx *rctx); 177 extern void crypto4xx_free_sa_rctx(struct crypto4xx_ctx *rctx); 178 extern void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx); 179 extern u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx); 180 extern u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx); 181 extern u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx); 182 extern u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx); 183 extern void crypto4xx_memcpy_le(unsigned int *dst, 184 const unsigned char *buf, int len); 185 extern u32 crypto4xx_build_pd(struct crypto_async_request *req, 186 struct crypto4xx_ctx *ctx, 187 struct scatterlist *src, 188 struct scatterlist *dst, 189 unsigned int datalen, 190 void *iv, u32 iv_len); 191 extern int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher, 192 const u8 *key, unsigned int keylen); 193 extern int crypto4xx_encrypt(struct ablkcipher_request *req); 194 extern int crypto4xx_decrypt(struct ablkcipher_request *req); 195 extern int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm); 196 extern int crypto4xx_hash_digest(struct ahash_request *req); 197 extern int crypto4xx_hash_final(struct ahash_request *req); 198 extern int crypto4xx_hash_update(struct ahash_request *req); 199 extern int crypto4xx_hash_init(struct ahash_request *req); 200 #endif 201