linux-imx

/*

 * Cryptographic API.

 *

 * Support for VIA PadLock hardware crypto engine.

 *

 * Copyright (c) 2006  Michal Ludvig <michal@logix.cz>

 *

 * 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.

 *

 */

​

#include <crypto/internal/hash.h>

#include <crypto/padlock.h>

#include <crypto/sha.h>

#include <linux/err.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/errno.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/scatterlist.h>

#include <asm/cpu_device_id.h>

#include <asm/fpu/api.h>

​

struct padlock_sha_desc {

    struct shash_desc fallback;

};

​

struct padlock_sha_ctx {

    struct crypto_shash *fallback;

};

​

static int padlock_sha_init(struct shash_desc *desc)

{

    struct padlock_sha_desc *dctx = shash_desc_ctx(desc);

    struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm);

​

    dctx->fallback.tfm = ctx->fallback;

    dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;

    return crypto_shash_init(&dctx->fallback);

}

​

static int padlock_sha_update(struct shash_desc *desc,

                  const u8 *data, unsigned int length)

{

    struct padlock_sha_desc *dctx = shash_desc_ctx(desc);

​

    dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;

    return crypto_shash_update(&dctx->fallback, data, length);

}

​

static int padlock_sha_export(struct shash_desc *desc, void *out)

{

    struct padlock_sha_desc *dctx = shash_desc_ctx(desc);

​

    return crypto_shash_export(&dctx->fallback, out);

}

​

static int padlock_sha_import(struct shash_desc *desc, const void *in)

{