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/drivers/crypto/amcc/crypto4xx_sa.c

https://bitbucket.org/cresqo/cm7-p500-kernel
C | 108 lines | 76 code | 11 blank | 21 comment | 8 complexity | 3bd0f83f306ba0a0b810cb6f13bc6ab3 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0 
    

  1. /**
    2. 

  2.  * AMCC SoC PPC4xx Crypto Driver
    3. 

  3.  *
    4. 

  4.  * Copyright (c) 2008 Applied Micro Circuits Corporation.
    5. 

  5.  * All rights reserved. James Hsiao <jhsiao@amcc.com>
    6. 

  6.  *
    7. 

  7.  * This program is free software; you can redistribute it and/or modify
    8. 

  8.  * it under the terms of the GNU General Public License as published by
    9. 

  9.  * the Free Software Foundation; either version 2 of the License, or
    10. 

  10.  * (at your option) any later version.
    11. 

  11.  *
    12. 

  12.  * This program is distributed in the hope that it will be useful,
    13. 

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    14. 

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    15. 

  15.  * GNU General Public License for more details.
    16. 

  16.  *
    17. 

  17.  * @file crypto4xx_sa.c
    18. 

  18.  *
    19. 

  19.  * This file implements the security context
    20. 

  20.  * assoicate format.
    21. 

  21.  */
    22. 

  22. #include <linux/kernel.h>
    23. 

  23. #include <linux/module.h>
    24. 

  24. #include <linux/moduleparam.h>
    25. 

  25. #include <linux/mod_devicetable.h>
    26. 

  26. #include <linux/interrupt.h>
    27. 

  27. #include <linux/spinlock_types.h>
    28. 

  28. #include <linux/highmem.h>
    29. 

  29. #include <linux/scatterlist.h>
    30. 

  30. #include <linux/crypto.h>
    31. 

  31. #include <crypto/algapi.h>
    32. 

  32. #include <crypto/des.h>
    33. 

  33. #include "crypto4xx_reg_def.h"
    34. 

  34. #include "crypto4xx_sa.h"
    35. 

  35. #include "crypto4xx_core.h"
    36. 

  36. 

  37. u32 get_dynamic_sa_offset_iv_field(struct crypto4xx_ctx *ctx)
    38. 

  38. {
    39. 

  39. 	u32 offset;
    40. 

  40. 	union dynamic_sa_contents cts;
    41. 

  41. 

  42. 	if (ctx->direction == DIR_INBOUND)
    43. 

  43. 		cts.w = ((struct dynamic_sa_ctl *)(ctx->sa_in))->sa_contents;
    44. 

  44. 	else
    45. 

  45. 		cts.w = ((struct dynamic_sa_ctl *)(ctx->sa_out))->sa_contents;
    46. 

  46. 	offset = cts.bf.key_size
    47. 

  47. 		+ cts.bf.inner_size
    48. 

  48. 		+ cts.bf.outer_size
    49. 

  49. 		+ cts.bf.spi
    50. 

  50. 		+ cts.bf.seq_num0
    51. 

  51. 		+ cts.bf.seq_num1
    52. 

  52. 		+ cts.bf.seq_num_mask0
    53. 

  53. 		+ cts.bf.seq_num_mask1
    54. 

  54. 		+ cts.bf.seq_num_mask2
    55. 

  55. 		+ cts.bf.seq_num_mask3;
    56. 

  56. 

  57. 	return sizeof(struct dynamic_sa_ctl) + offset * 4;
    58. 

  58. }
    59. 

  59. 

  60. u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx)
    61. 

  61. {
    62. 

  62. 	u32 offset;
    63. 

  63. 	union dynamic_sa_contents cts;
    64. 

  64. 

  65. 	if (ctx->direction == DIR_INBOUND)
    66. 

  66. 		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
    67. 

  67. 	else
    68. 

  68. 		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
    69. 

  69. 	offset = cts.bf.key_size
    70. 

  70. 		+ cts.bf.inner_size
    71. 

  71. 		+ cts.bf.outer_size
    72. 

  72. 		+ cts.bf.spi
    73. 

  73. 		+ cts.bf.seq_num0
    74. 

  74. 		+ cts.bf.seq_num1
    75. 

  75. 		+ cts.bf.seq_num_mask0
    76. 

  76. 		+ cts.bf.seq_num_mask1
    77. 

  77. 		+ cts.bf.seq_num_mask2
    78. 

  78. 		+ cts.bf.seq_num_mask3
    79. 

  79. 		+ cts.bf.iv0
    80. 

  80. 		+ cts.bf.iv1
    81. 

  81. 		+ cts.bf.iv2
    82. 

  82. 		+ cts.bf.iv3;
    83. 

  83. 

  84. 	return sizeof(struct dynamic_sa_ctl) + offset * 4;
    85. 

  85. }
    86. 

  86. 

  87. u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx)
    88. 

  88. {
    89. 

  89. 	union dynamic_sa_contents cts;
    90. 

  90. 

  91. 	if (ctx->direction == DIR_INBOUND)
    92. 

  92. 		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
    93. 

  93. 	else
    94. 

  94. 		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
    95. 

  95. 	return (cts.bf.iv0 + cts.bf.iv1 + cts.bf.iv2 + cts.bf.iv3) * 4;
    96. 

  96. }
    97. 

  97. 

  98. u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx)
    99. 

  99. {
    100. 

  100. 	union dynamic_sa_contents cts;
    101. 

  101. 

  102. 	if (ctx->direction == DIR_INBOUND)
    103. 

  103. 		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
    104. 

  104. 	else
    105. 

  105. 		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
    106. 

  106. 

  107. 	return sizeof(struct dynamic_sa_ctl);
    108. 

  108. }
    109. 

  109.