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    Subject[PATCH v2 09/17] powerpc: crypto: AES-ECB mode routines for nx encryption
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    These routines add support for AES in ECB mode on the Power7+ CPU's
    in-Nest accelerator driver.

    Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
    ---
    drivers/crypto/nx/nx-aes-ecb.c | 138 ++++++++++++++++++++++++++++++++++++++++
    1 files changed, 138 insertions(+), 0 deletions(-)
    create mode 100644 drivers/crypto/nx/nx-aes-ecb.c

    diff --git a/drivers/crypto/nx/nx-aes-ecb.c b/drivers/crypto/nx/nx-aes-ecb.c
    new file mode 100644
    index 0000000..6db5a71
    --- /dev/null
    +++ b/drivers/crypto/nx/nx-aes-ecb.c
    @@ -0,0 +1,138 @@
    +/**
    + * AES ECB routines supporting the Power 7+ Nest Accelerators driver
    + *
    + * Copyright (C) 2011-2012 International Business Machines Inc.
    + *
    + * 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; version 2 only.
    + *
    + * 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.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, write to the Free Software
    + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    + *
    + * Author: Kent Yoder <yoder1@us.ibm.com>
    + */
    +
    +#include <crypto/aes.h>
    +#include <crypto/algapi.h>
    +#include <linux/module.h>
    +#include <linux/types.h>
    +#include <linux/crypto.h>
    +#include <asm/vio.h>
    +
    +#include "nx_csbcpb.h"
    +#include "nx.h"
    +
    +
    +static int ecb_aes_nx_set_key(struct crypto_tfm *tfm,
    + const u8 *in_key,
    + unsigned int key_len)
    +{
    + struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
    + struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
    +
    + nx_ctx_init(nx_ctx, HCOP_FC_AES);
    +
    + switch (key_len) {
    + case AES_KEYSIZE_128:
    + NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_128);
    + nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_128];
    + break;
    + case AES_KEYSIZE_192:
    + NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_192);
    + nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_192];
    + break;
    + case AES_KEYSIZE_256:
    + NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_256);
    + nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_256];
    + break;
    + default:
    + return -EINVAL;
    + }
    +
    + csbcpb->cpb.hdr.mode = NX_MODE_AES_ECB;
    + memcpy(csbcpb->cpb.aes_ecb.key, in_key, key_len);
    +
    + return 0;
    +}
    +
    +static int ecb_aes_nx_crypt(struct blkcipher_desc *desc,
    + struct scatterlist *dst,
    + struct scatterlist *src,
    + unsigned int nbytes,
    + int enc)
    +{
    + struct nx_crypto_ctx *nx_ctx = crypto_blkcipher_ctx(desc->tfm);
    + struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
    + int rc;
    +
    + if (nbytes > nx_ctx->ap->databytelen)
    + return -EINVAL;
    +
    + if (enc)
    + NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT;
    + else
    + NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT;
    +
    + rc = nx_build_sg_lists(nx_ctx, desc, dst, src, nbytes, NULL);
    + if (rc)
    + goto out;
    +
    + if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) {
    + rc = -EINVAL;
    + goto out;
    + }
    +
    + rc = nx_hcall_sync(nx_ctx, &nx_ctx->op);
    + if (rc)
    + goto out;
    +
    + atomic_inc(&(nx_ctx->stats->aes_ops));
    + atomic64_add(csbcpb->csb.processed_byte_count,
    + &(nx_ctx->stats->aes_bytes));
    +out:
    + return rc;
    +}
    +
    +static int ecb_aes_nx_encrypt(struct blkcipher_desc *desc,
    + struct scatterlist *dst,
    + struct scatterlist *src,
    + unsigned int nbytes)
    +{
    + return ecb_aes_nx_crypt(desc, dst, src, nbytes, 1);
    +}
    +
    +static int ecb_aes_nx_decrypt(struct blkcipher_desc *desc,
    + struct scatterlist *dst,
    + struct scatterlist *src,
    + unsigned int nbytes)
    +{
    + return ecb_aes_nx_crypt(desc, dst, src, nbytes, 0);
    +}
    +
    +struct crypto_alg nx_ecb_aes_alg = {
    + .cra_name = "ecb(aes)",
    + .cra_driver_name = "ecb-aes-nx",
    + .cra_priority = 300,
    + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
    + .cra_blocksize = AES_BLOCK_SIZE,
    + .cra_ctxsize = sizeof(struct nx_crypto_ctx),
    + .cra_type = &crypto_blkcipher_type,
    + .cra_module = THIS_MODULE,
    + .cra_list = LIST_HEAD_INIT(nx_ecb_aes_alg.cra_list),
    + .cra_init = nx_crypto_ctx_aes_ecb_init,
    + .cra_exit = nx_crypto_ctx_exit,
    + .cra_blkcipher = {
    + .min_keysize = AES_MIN_KEY_SIZE,
    + .max_keysize = AES_MAX_KEY_SIZE,
    + .setkey = ecb_aes_nx_set_key,
    + .encrypt = ecb_aes_nx_encrypt,
    + .decrypt = ecb_aes_nx_decrypt,
    + }
    +};
    --
    1.7.1



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