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_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}