crypto4xx_sa.c

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#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_iv_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;

    return sizeof(struct dynamic_sa_ctl) + offset * 4;
}

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);
}