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James Hsiao049359d2009-02-05 16:18:13 +11001/**
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 * @file crypto4xx_sa.c
18 *
19 * This file implements the security context
20 * assoicate format.
21 */
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/moduleparam.h>
25#include <linux/mod_devicetable.h>
26#include <linux/interrupt.h>
27#include <linux/spinlock_types.h>
28#include <linux/highmem.h>
29#include <linux/scatterlist.h>
30#include <linux/crypto.h>
31#include <crypto/algapi.h>
32#include <crypto/des.h>
33#include "crypto4xx_reg_def.h"
34#include "crypto4xx_sa.h"
35#include "crypto4xx_core.h"
36
37u32 get_dynamic_sa_offset_iv_field(struct crypto4xx_ctx *ctx)
38{
39 u32 offset;
40 union dynamic_sa_contents cts;
41
42 if (ctx->direction == DIR_INBOUND)
43 cts.w = ((struct dynamic_sa_ctl *)(ctx->sa_in))->sa_contents;
44 else
45 cts.w = ((struct dynamic_sa_ctl *)(ctx->sa_out))->sa_contents;
46 offset = cts.bf.key_size
47 + cts.bf.inner_size
48 + cts.bf.outer_size
49 + cts.bf.spi
50 + cts.bf.seq_num0
51 + cts.bf.seq_num1
52 + cts.bf.seq_num_mask0
53 + cts.bf.seq_num_mask1
54 + cts.bf.seq_num_mask2
55 + cts.bf.seq_num_mask3;
56
57 return sizeof(struct dynamic_sa_ctl) + offset * 4;
58}
59
60u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx)
61{
62 u32 offset;
63 union dynamic_sa_contents cts;
64
65 if (ctx->direction == DIR_INBOUND)
66 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
67 else
68 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
69 offset = cts.bf.key_size
70 + cts.bf.inner_size
71 + cts.bf.outer_size
72 + cts.bf.spi
73 + cts.bf.seq_num0
74 + cts.bf.seq_num1
75 + cts.bf.seq_num_mask0
76 + cts.bf.seq_num_mask1
77 + cts.bf.seq_num_mask2
78 + cts.bf.seq_num_mask3
79 + cts.bf.iv0
80 + cts.bf.iv1
81 + cts.bf.iv2
82 + cts.bf.iv3;
83
84 return sizeof(struct dynamic_sa_ctl) + offset * 4;
85}
86
87u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx)
88{
89 union dynamic_sa_contents cts;
90
91 if (ctx->direction == DIR_INBOUND)
92 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
93 else
94 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
95 return (cts.bf.iv0 + cts.bf.iv1 + cts.bf.iv2 + cts.bf.iv3) * 4;
96}
97
98u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx)
99{
100 union dynamic_sa_contents cts;
101
102 if (ctx->direction == DIR_INBOUND)
103 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
104 else
105 cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
106
107 return sizeof(struct dynamic_sa_ctl);
108}