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 * @file crypto4xx_sa.c
18 *
19 * This file implements the security context
20 * associate 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_state_ptr_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		+ cts.bf.iv0
57		+ cts.bf.iv1
58		+ cts.bf.iv2
59		+ cts.bf.iv3;
60
61	return sizeof(struct dynamic_sa_ctl) + offset * 4;
62}
63
64u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx)
65{
66	union dynamic_sa_contents cts;
67
68	if (ctx->direction == DIR_INBOUND)
69		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
70	else
71		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
72	return (cts.bf.iv0 + cts.bf.iv1 + cts.bf.iv2 + cts.bf.iv3) * 4;
73}
74
75u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx)
76{
77	union dynamic_sa_contents cts;
78
79	if (ctx->direction == DIR_INBOUND)
80		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
81	else
82		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
83
84	return sizeof(struct dynamic_sa_ctl);
85}
86