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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/crypto/amcc/crypto4xx_sa.c
15111 views
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/**

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 * AMCC SoC PPC4xx Crypto Driver

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 *

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 * Copyright (c) 2008 Applied Micro Circuits Corporation.

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 * All rights reserved. James Hsiao <[email protected]>

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License as published by

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 * the Free Software Foundation; either version 2 of the License, or

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 * (at your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful,

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 * GNU General Public License for more details.

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 *

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 * @file crypto4xx_sa.c

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 *

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 * This file implements the security context

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 * associate format.

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 */

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#include <linux/kernel.h>

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#include <linux/module.h>

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#include <linux/moduleparam.h>

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#include <linux/mod_devicetable.h>

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#include <linux/interrupt.h>

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#include <linux/spinlock_types.h>

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#include <linux/highmem.h>

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#include <linux/scatterlist.h>

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#include <linux/crypto.h>

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#include <crypto/algapi.h>

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#include <crypto/des.h>

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#include "crypto4xx_reg_def.h"

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#include "crypto4xx_sa.h"

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#include "crypto4xx_core.h"

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u32 get_dynamic_sa_offset_iv_field(struct crypto4xx_ctx *ctx)

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{

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	u32 offset;

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	union dynamic_sa_contents cts;

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	if (ctx->direction == DIR_INBOUND)

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		cts.w = ((struct dynamic_sa_ctl *)(ctx->sa_in))->sa_contents;

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	else

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		cts.w = ((struct dynamic_sa_ctl *)(ctx->sa_out))->sa_contents;

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	offset = cts.bf.key_size

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		+ cts.bf.inner_size

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		+ cts.bf.outer_size

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		+ cts.bf.spi

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		+ cts.bf.seq_num0

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		+ cts.bf.seq_num1

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		+ cts.bf.seq_num_mask0

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		+ cts.bf.seq_num_mask1

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		+ cts.bf.seq_num_mask2

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		+ cts.bf.seq_num_mask3;

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	return sizeof(struct dynamic_sa_ctl) + offset * 4;

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}

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u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx)

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{

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	u32 offset;

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	union dynamic_sa_contents cts;

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	if (ctx->direction == DIR_INBOUND)

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		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;

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	else

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		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;

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	offset = cts.bf.key_size

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		+ cts.bf.inner_size

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		+ cts.bf.outer_size

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		+ cts.bf.spi

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		+ cts.bf.seq_num0

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		+ cts.bf.seq_num1

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		+ cts.bf.seq_num_mask0

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		+ cts.bf.seq_num_mask1

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		+ cts.bf.seq_num_mask2

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		+ cts.bf.seq_num_mask3

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		+ cts.bf.iv0

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		+ cts.bf.iv1

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		+ cts.bf.iv2

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		+ cts.bf.iv3;

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	return sizeof(struct dynamic_sa_ctl) + offset * 4;

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}

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u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx)

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{

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	union dynamic_sa_contents cts;

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	if (ctx->direction == DIR_INBOUND)

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		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;

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	else

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		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;

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	return (cts.bf.iv0 + cts.bf.iv1 + cts.bf.iv2 + cts.bf.iv3) * 4;

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}

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u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx)

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{

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	union dynamic_sa_contents cts;

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	if (ctx->direction == DIR_INBOUND)

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		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_in)->sa_contents;

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	else

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		cts.w = ((struct dynamic_sa_ctl *) ctx->sa_out)->sa_contents;

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	return sizeof(struct dynamic_sa_ctl);

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}

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