Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CC6EC10F0E for ; Thu, 18 Apr 2019 13:41:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 772CA20675 for ; Thu, 18 Apr 2019 13:41:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389200AbfDRNld (ORCPT ); Thu, 18 Apr 2019 09:41:33 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:33692 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388375AbfDRNlc (ORCPT ); Thu, 18 Apr 2019 09:41:32 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 4F0891688; Thu, 18 Apr 2019 06:41:32 -0700 (PDT) Received: from e110176-lin.kfn.arm.com (e110176-lin.kfn.arm.com [10.50.4.178]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D7CBF3F5AF; Thu, 18 Apr 2019 06:41:30 -0700 (PDT) From: Gilad Ben-Yossef To: Herbert Xu , "David S. Miller" Cc: Ofir Drang , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 23/35] crypto: ccree: simplify AEAD ICV addr calculation Date: Thu, 18 Apr 2019 16:38:58 +0300 Message-Id: <20190418133913.9122-24-gilad@benyossef.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190418133913.9122-1-gilad@benyossef.com> References: <20190418133913.9122-1-gilad@benyossef.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org The function cc_prepare_aead_data_dlli() which calculates ICV addresses was needlessly complicate it. This patch simplifies it without altering its functionality. Signed-off-by: Gilad Ben-Yossef --- drivers/crypto/ccree/cc_buffer_mgr.c | 28 +++++++++++----------------- 1 file changed, 11 insertions(+), 17 deletions(-) diff --git a/drivers/crypto/ccree/cc_buffer_mgr.c b/drivers/crypto/ccree/cc_buffer_mgr.c index 8269474cb9fa..8554cfb2963a 100644 --- a/drivers/crypto/ccree/cc_buffer_mgr.c +++ b/drivers/crypto/ccree/cc_buffer_mgr.c @@ -749,27 +749,21 @@ static void cc_prepare_aead_data_dlli(struct aead_request *req, struct aead_req_ctx *areq_ctx = aead_request_ctx(req); enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type; unsigned int authsize = areq_ctx->req_authsize; + struct scatterlist *sg; + ssize_t offset; areq_ctx->is_icv_fragmented = false; - if (req->src == req->dst) { - /*INPLACE*/ - areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->src_sgl) + - (*src_last_bytes - authsize); - areq_ctx->icv_virt_addr = sg_virt(areq_ctx->src_sgl) + - (*src_last_bytes - authsize); - } else if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) { - /*NON-INPLACE and DECRYPT*/ - areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->src_sgl) + - (*src_last_bytes - authsize); - areq_ctx->icv_virt_addr = sg_virt(areq_ctx->src_sgl) + - (*src_last_bytes - authsize); + + if ((req->src == req->dst) || direct == DRV_CRYPTO_DIRECTION_DECRYPT) { + sg = areq_ctx->src_sgl; + offset = *src_last_bytes - authsize; } else { - /*NON-INPLACE and ENCRYPT*/ - areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->dst_sgl) + - (*dst_last_bytes - authsize); - areq_ctx->icv_virt_addr = sg_virt(areq_ctx->dst_sgl) + - (*dst_last_bytes - authsize); + sg = areq_ctx->dst_sgl; + offset = *dst_last_bytes - authsize; } + + areq_ctx->icv_dma_addr = sg_dma_address(sg) + offset; + areq_ctx->icv_virt_addr = sg_virt(sg) + offset; } static void cc_prepare_aead_data_mlli(struct cc_drvdata *drvdata, -- 2.21.0