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 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 of_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