drivers/crypto/geode-aes.h

   1 /* Copyright (C) 2003-2006, Advanced Micro Devices, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  */
   8
   9 #ifndef _GEODE_AES_H_
  10 #define _GEODE_AES_H_
  11
  12 /* driver logic flags */
  13 #define AES_IV_LENGTH  16
  14 #define AES_KEY_LENGTH 16
  15 #define AES_MIN_BLOCK_SIZE 16
  16
  17 #define AES_MODE_ECB 0
  18 #define AES_MODE_CBC 1
  19
  20 #define AES_DIR_DECRYPT 0
  21 #define AES_DIR_ENCRYPT 1
  22
  23 #define AES_FLAGS_HIDDENKEY (1 << 0)
  24
  25 /* Register definitions */
  26
  27 #define AES_CTRLA_REG  0x0000
  28
  29 #define AES_CTRL_START     0x01
  30 #define AES_CTRL_DECRYPT   0x00
  31 #define AES_CTRL_ENCRYPT   0x02
  32 #define AES_CTRL_WRKEY     0x04
  33 #define AES_CTRL_DCA       0x08
  34 #define AES_CTRL_SCA       0x10
  35 #define AES_CTRL_CBC       0x20
  36
  37 #define AES_INTR_REG  0x0008
  38
  39 #define AES_INTRA_PENDING (1 << 16)
  40 #define AES_INTRB_PENDING (1 << 17)
  41
  42 #define AES_INTR_PENDING  (AES_INTRA_PENDING | AES_INTRB_PENDING)
  43 #define AES_INTR_MASK     0x07
  44
  45 #define AES_SOURCEA_REG   0x0010
  46 #define AES_DSTA_REG      0x0014
  47 #define AES_LENA_REG      0x0018
  48 #define AES_WRITEKEY0_REG 0x0030
  49 #define AES_WRITEIV0_REG  0x0040
  50
  51 /*  A very large counter that is used to gracefully bail out of an
  52  *  operation in case of trouble
  53  */
  54
  55 #define AES_OP_TIMEOUT    0x50000
  56
  57 struct geode_aes_op {
  58
  59         void *src;
  60         void *dst;
  61
  62         u32 mode;
  63         u32 dir;
  64         u32 flags;
  65         int len;
  66
  67         u8 key[AES_KEY_LENGTH];
  68         u8 *iv;
  69
  70         union {
  71                 struct crypto_blkcipher *blk;
  72                 struct crypto_cipher *cip;
  73         } fallback;
  74         u32 keylen;
  75 };
  76
  77 #endif