From patchwork Wed Mar 21 21:39:28 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kent Yoder X-Patchwork-Id: 148102 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id 0732EB7141 for ; Thu, 22 Mar 2012 09:41:20 +1100 (EST) Received: from e9.ny.us.ibm.com (e9.ny.us.ibm.com [32.97.182.139]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e9.ny.us.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 96B90B6EEC for ; Thu, 22 Mar 2012 08:38:42 +1100 (EST) Received: from /spool/local by e9.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 21 Mar 2012 17:38:37 -0400 Received: from d01relay04.pok.ibm.com (d01relay04.pok.ibm.com [9.56.227.236]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 61F8938C8052 for ; Wed, 21 Mar 2012 17:38:36 -0400 (EDT) Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay04.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q2LLcapx333222 for ; Wed, 21 Mar 2012 17:38:36 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q2LLcZJo023969 for ; Wed, 21 Mar 2012 18:38:36 -0300 Received: from [9.53.41.73] (ennui.austin.ibm.com [9.53.41.73]) by d01av02.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id q2LLcXac023778; Wed, 21 Mar 2012 18:38:34 -0300 Message-ID: <1332365968.3858.34.camel@key-ThinkPad-W510> Subject: [PATCH 06/17] powerpc: crypto: AES-CBC mode routines for nx encryption From: Kent Yoder To: linux-kernel@vger.kernel.org Date: Wed, 21 Mar 2012 16:39:28 -0500 In-Reply-To: <1332365297.3858.5.camel@key-ThinkPad-W510> References: <1332365297.3858.5.camel@key-ThinkPad-W510> X-Mailer: Evolution 3.2.2- Mime-Version: 1.0 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12032121-7182-0000-0000-00000116A5F4 X-Mailman-Approved-At: Thu, 22 Mar 2012 09:29:35 +1100 Cc: rcj@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, linux-crypto@vger.kernel.org X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org These routines add support for AES in CBC mode on the Power7+ CPU's in-Nest accelerator driver. Signed-off-by: Kent Yoder --- arch/powerpc/crypto/nx/nx-aes-cbc.c | 135 +++++++++++++++++++++++++++++++++++ 1 files changed, 135 insertions(+), 0 deletions(-) create mode 100644 arch/powerpc/crypto/nx/nx-aes-cbc.c diff --git a/arch/powerpc/crypto/nx/nx-aes-cbc.c b/arch/powerpc/crypto/nx/nx-aes-cbc.c new file mode 100644 index 0000000..01fa5cb --- /dev/null +++ b/arch/powerpc/crypto/nx/nx-aes-cbc.c @@ -0,0 +1,135 @@ +/** + * AES CBC 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 + */ + +#include +#include +#include +#include +#include +#include + +#include "nx_csbcpb.h" +#include "nx.h" + + +static int cbc_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 = nx_ctx->csbcpb; + + nx_ctx_init(nx_ctx, HCOP_FC_AES); + + switch (key_len) { + case AES_KEYSIZE_128: + csbcpb->cpb.hdr.key_size = NX_KS_AES_128; + nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_128]; + break; + case AES_KEYSIZE_192: + csbcpb->cpb.hdr.key_size = NX_KS_AES_192; + nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_192]; + break; + case AES_KEYSIZE_256: + csbcpb->cpb.hdr.key_size = 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_CBC; + memcpy(csbcpb->cpb.aes_cbc.key, in_key, key_len); + + return 0; +} + +static int cbc_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; + + csbcpb->cpb.hdr.fdm.ende = enc; + + rc = nx_build_sg_lists(nx_ctx, desc, dst, src, nbytes, + csbcpb->cpb.aes_cbc.iv); + if (rc) + goto out; + + if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) + return -EINVAL; + + 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 cbc_aes_nx_encrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, + struct scatterlist *src, + unsigned int nbytes) +{ + return cbc_aes_nx_crypt(desc, dst, src, nbytes, 1); +} + +static int cbc_aes_nx_decrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, + struct scatterlist *src, + unsigned int nbytes) +{ + return cbc_aes_nx_crypt(desc, dst, src, nbytes, 0); +} + +struct crypto_alg nx_cbc_aes_alg = { + .cra_name = "cbc(aes)", + .cra_driver_name = "cbc-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_cbc_aes_alg.cra_list), + .cra_init = nx_crypto_ctx_aes_cbc_init, + .cra_exit = nx_crypto_ctx_exit, + .cra_blkcipher = { + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .setkey = cbc_aes_nx_set_key, + .encrypt = cbc_aes_nx_encrypt, + .decrypt = cbc_aes_nx_decrypt, + } +};