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