crypto4xx_sa.c
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/**
* AMCC SoC PPC4xx Crypto Driver
*
* Copyright (c) 2008 Applied Micro Circuits Corporation.
* All rights reserved. James Hsiao <jhsiao@amcc.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* @file crypto4xx_sa.c
*
* This file implements the security context
* associate format.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/mod_devicetable.h>
#include <linux/interrupt.h>
#include <linux/spinlock_types.h>
#include <linux/highmem.h>
#include <linux/scatterlist.h>
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <crypto/des.h>
#include "crypto4xx_reg_def.h"
#include "crypto4xx_sa.h"
#include "crypto4xx_core.h"
u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx)
{
u32 offset;
union dynamic_sa_contents cts;
if (ctx->direction == DIR_INBOUND)
cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
else
cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
offset = cts.bf.key_size
+ cts.bf.inner_size
+ cts.bf.outer_size
+ cts.bf.spi
+ cts.bf.seq_num0
+ cts.bf.seq_num1
+ cts.bf.seq_num_mask0
+ cts.bf.seq_num_mask1
+ cts.bf.seq_num_mask2
+ cts.bf.seq_num_mask3
+ cts.bf.iv0
+ cts.bf.iv1
+ cts.bf.iv2
+ cts.bf.iv3;
return sizeof(struct dynamic_sa_ctl) + offset * 4;
}
u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx)
{
union dynamic_sa_contents cts;
if (ctx->direction == DIR_INBOUND)
cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
else
cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
return (cts.bf.iv0 + cts.bf.iv1 + cts.bf.iv2 + cts.bf.iv3) * 4;
}
u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx)
{
union dynamic_sa_contents cts;
if (ctx->direction == DIR_INBOUND)
cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;
else
cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;
return sizeof(struct dynamic_sa_ctl);
}