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[54.197.127.237]) by mx.google.com with ESMTP id u2si7248078qtj.293.2018.01.12.20.03.41; Fri, 12 Jan 2018 20:03:42 -0800 (PST) Received-SPF: pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.197.127.237 as permitted sender) client-ip=54.197.127.237; Authentication-Results: mx.google.com; spf=pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.197.127.237 as permitted sender) smtp.mailfrom=lng-odp-bounces@lists.linaro.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=yandex.ru Received: by lists.linaro.org (Postfix, from userid 109) id C056C61766; Sat, 13 Jan 2018 04:03:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on ip-10-142-244-252 X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,FREEMAIL_FROM, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2 autolearn=disabled version=3.4.0 Received: from [127.0.0.1] (localhost [127.0.0.1]) by lists.linaro.org (Postfix) with ESMTP id 7E15861773; Sat, 13 Jan 2018 04:00:39 +0000 (UTC) X-Original-To: lng-odp@lists.linaro.org Delivered-To: lng-odp@lists.linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id C62DE6095E; Sat, 13 Jan 2018 04:00:18 +0000 (UTC) Received: from forward102o.mail.yandex.net (forward102o.mail.yandex.net [37.140.190.182]) by lists.linaro.org (Postfix) with ESMTPS id 5536260CFC for ; Sat, 13 Jan 2018 04:00:13 +0000 (UTC) Received: from mxback14g.mail.yandex.net (mxback14g.mail.yandex.net [IPv6:2a02:6b8:0:1472:2741:0:8b7:93]) by forward102o.mail.yandex.net (Yandex) with ESMTP id 155535A0370B for ; Sat, 13 Jan 2018 07:00:12 +0300 (MSK) Received: from smtp1p.mail.yandex.net (smtp1p.mail.yandex.net [2a02:6b8:0:1472:2741:0:8b6:6]) by mxback14g.mail.yandex.net (nwsmtp/Yandex) with ESMTP id O5TyvAYEgC-0B0iEPUR; Sat, 13 Jan 2018 07:00:12 +0300 Received: by smtp1p.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id GnJsmNomDX-0BGCrHUq; Sat, 13 Jan 2018 07:00:11 +0300 (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (Client certificate not present) From: Github ODP bot To: lng-odp@lists.linaro.org Date: Sat, 13 Jan 2018 07:00:06 +0300 Message-Id: <1515816008-7212-6-git-send-email-odpbot@yandex.ru> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1515816008-7212-1-git-send-email-odpbot@yandex.ru> References: <1515816008-7212-1-git-send-email-odpbot@yandex.ru> Github-pr-num: 389 Subject: [lng-odp] [PATCH v1] [WIP 5/7] linux-gen: chksum: separate checksumming function X-BeenThere: lng-odp@lists.linaro.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: "The OpenDataPlane \(ODP\) List" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: lng-odp-bounces@lists.linaro.org Sender: "lng-odp" From: Dmitry Eremin-Solenikov Separate main checksumming code, it will be used for packet checksum validation. Signed-off-by: Dmitry Eremin-Solenikov --- /** Email created from pull request 389 (lumag:parse-checksums) ** https://github.com/Linaro/odp/pull/389 ** Patch: https://github.com/Linaro/odp/pull/389.patch ** Base sha: 49ebafae0edebbc750742d8874ad0a7588286dea ** Merge commit sha: ab214b82da2a920444a5e65d029f3f42a98ec314 **/ platform/linux-generic/Makefile.am | 1 + .../linux-generic/include/odp_chksum_internal.h | 59 ++++++++++++++++++++++ platform/linux-generic/odp_chksum.c | 18 ++----- 3 files changed, 63 insertions(+), 15 deletions(-) create mode 100644 platform/linux-generic/include/odp_chksum_internal.h diff --git a/platform/linux-generic/Makefile.am b/platform/linux-generic/Makefile.am index 7e40448bd..9c7563fb1 100644 --- a/platform/linux-generic/Makefile.am +++ b/platform/linux-generic/Makefile.am @@ -134,6 +134,7 @@ noinst_HEADERS = \ include/odp_bitmap_internal.h \ include/odp_bitset.h \ include/odp_buffer_internal.h \ + include/odp_chksum_internal.h \ include/odp_classification_datamodel.h \ include/odp_classification_inlines.h \ include/odp_classification_internal.h \ diff --git a/platform/linux-generic/include/odp_chksum_internal.h b/platform/linux-generic/include/odp_chksum_internal.h new file mode 100644 index 000000000..779598bbf --- /dev/null +++ b/platform/linux-generic/include/odp_chksum_internal.h @@ -0,0 +1,59 @@ +/* Copyright (c) 2013, Linaro Limited + * All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +/** + * @file + * + * ODP checksum - implementation internal + */ + +#ifndef ODP_CHKSUM_INTERNAL_H_ +#define ODP_CHKSUM_INTERNAL_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +/* Simple implementation of ones complement sum. + * Based on RFC1071 and its errata. + */ +static uint32_t _odp_chksum_ones_comp16_32(const void *p, uint32_t len, + odp_bool_t odd_offset) + +{ + uint32_t sum = 0; + const uint16_t *data = p; + + if (odd_offset) { + uint16_t left_over = 0; + + *(uint8_t *)&left_over = *(const uint8_t *)data; + sum = left_over; + data++; + len--; + } + + while (len > 1) { + sum += *data++; + len -= 2; + } + + /* Add left-over byte, if any */ + if (len > 0) { + uint16_t left_over = 0; + + *(uint8_t *)&left_over = *(const uint8_t *)data; + sum += left_over; + } + + return sum; +} + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/platform/linux-generic/odp_chksum.c b/platform/linux-generic/odp_chksum.c index a792971ef..484b2b0ae 100644 --- a/platform/linux-generic/odp_chksum.c +++ b/platform/linux-generic/odp_chksum.c @@ -7,26 +7,14 @@ #include #include +#include + /* Simple implementation of ones complement sum. * Based on RFC1071 and its errata. */ uint16_t odp_chksum_ones_comp16(const void *p, uint32_t len) { - uint32_t sum = 0; - const uint16_t *data = p; - - while (len > 1) { - sum += *data++; - len -= 2; - } - - /* Add left-over byte, if any */ - if (len > 0) { - uint16_t left_over = 0; - - *(uint8_t *)&left_over = *(const uint8_t *)data; - sum += left_over; - } + uint32_t sum = _odp_chksum_ones_comp16_32(p, len, false); /* Fold 32-bit sum to 16 bits */ while (sum >> 16)