drivers/crypto/amcc/crypto4xx_core.h

   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