From mboxrd@z Thu Jan 1 00:00:00 1970 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,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 078D3C433E0 for ; Sat, 23 Jan 2021 10:53:51 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 71713233E2 for ; Sat, 23 Jan 2021 10:53:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 71713233E2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:60514 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l3GY9-0002sq-EE for qemu-devel@archiver.kernel.org; Sat, 23 Jan 2021 05:53:49 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51106) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l3GLh-00035r-Va; Sat, 23 Jan 2021 05:40:58 -0500 Received: from mail-pj1-x1031.google.com ([2607:f8b0:4864:20::1031]:53608) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1l3GLT-0002yk-Vv; Sat, 23 Jan 2021 05:40:57 -0500 Received: by mail-pj1-x1031.google.com with SMTP id p15so5386208pjv.3; Sat, 23 Jan 2021 02:40:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ALbOnPfAfRKgJyHGBPzPuuobeeq+W6JbjseuGZyJZws=; b=OOv1jg3wWVbptbKdfWPn+gPNhsBvt02LBzkk3qcctDzuBdPju4i29mMVLQ1ZNaqr0e E7lMQH0rhBGk7Ceux+opbsPo5Z8IaLJ7O9kOrbMROqY9G2lqkk5cmJe/rpnNKxfsGhr1 tMdu4Fwl6mljLoi4wQoTC7YlUOSUypUlZSDjiNiIo+BdeSL00cNnJI3cUbdBfLyO+cUS ISrngtnIGBF1Zu0cg1QfCSTwt+1DIrYo48L2tWDhO+bXC634o9DyBScoSSXCrFGJALht 9NaGdtggQ62OWhsDkuKQa73KqW/j0x+e8kzGk2WoFbpcxWcrxwLZJCnTeeQPwRHejlPW mo7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ALbOnPfAfRKgJyHGBPzPuuobeeq+W6JbjseuGZyJZws=; b=HrVwSMguaSlUdVGmZrplk2OEFmRyf1I5xaW98Y9uoSrpynJOBxCbmzEqR39YDLKbLr 7xpgk2H6FYnv/O9eQgAfelTsFWcGHeTJ7xwduvnG7VhYZU2bV2vTw4x30izgAqA6Rvm0 AgLR5PdqukVoC3V1YpR40xE7LEdpKUSiQqLihtZdpw0CGil7VDEFi/Dh40EU1ohiXjW1 /6DtfAG90YPHxUY00DJB8P1X9T8MK7U7JjpsB8U3i6HCmHHfKSNtwCJ92r2Tu2RuFX+l cOg9pEwcm0jUjIW+9X5949OX7UdYEg9pHbAUgl3hsZnJBRGbFAP4JNw05Zpbpv2m5X/N fdFA== X-Gm-Message-State: AOAM530gQlSB4gol3lG5K1ORAsWa/qCYIjfKlNohg5ME1n+jyxtcY2cR Wg+nakblmc0BkMxKRNAprKfEn8HNUjBhZg== X-Google-Smtp-Source: ABdhPJwtL0i3HRpODt6E29cG6zASj7zBtkfgtPjs0iOJMcsRYGF6QMBZV/YPRfh9RjyBz/EAJrYVHA== X-Received: by 2002:a17:90a:fc3:: with SMTP id 61mr752613pjz.197.1611398440666; Sat, 23 Jan 2021 02:40:40 -0800 (PST) Received: from i9-aorus-gtx1080.localdomain (144.168.56.201.16clouds.com. [144.168.56.201]) by smtp.gmail.com with ESMTPSA id a5sm10575463pgl.41.2021.01.23.02.40.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 23 Jan 2021 02:40:40 -0800 (PST) From: Bin Meng To: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Alistair Francis , qemu-block@nongnu.org, qemu-riscv@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH v2 06/25] util: Add CRC16 (CCITT) calculation routines Date: Sat, 23 Jan 2021 18:39:57 +0800 Message-Id: <20210123104016.17485-7-bmeng.cn@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210123104016.17485-1-bmeng.cn@gmail.com> References: <20210123104016.17485-1-bmeng.cn@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::1031; envelope-from=bmeng.cn@gmail.com; helo=mail-pj1-x1031.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bin Meng Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Bin Meng Import CRC16 calculation routines from Linux kernel v5.10: include/linux/crc-ccitt.h lib/crc-ccitt.c to QEMU: include/qemu/crc-ccitt.h util/crc-ccitt.c Signed-off-by: Bin Meng Acked-by: Alistair Francis --- (no changes since v1) include/qemu/crc-ccitt.h | 33 ++++++++++ util/crc-ccitt.c | 127 +++++++++++++++++++++++++++++++++++++++ util/meson.build | 1 + 3 files changed, 161 insertions(+) create mode 100644 include/qemu/crc-ccitt.h create mode 100644 util/crc-ccitt.c diff --git a/include/qemu/crc-ccitt.h b/include/qemu/crc-ccitt.h new file mode 100644 index 0000000000..06ee55b159 --- /dev/null +++ b/include/qemu/crc-ccitt.h @@ -0,0 +1,33 @@ +/* + * CRC16 (CCITT) Checksum Algorithm + * + * Copyright (c) 2021 Wind River Systems, Inc. + * + * Author: + * Bin Meng + * + * From Linux kernel v5.10 include/linux/crc-ccitt.h + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#ifndef _CRC_CCITT_H +#define _CRC_CCITT_H + +extern uint16_t const crc_ccitt_table[256]; +extern uint16_t const crc_ccitt_false_table[256]; + +extern uint16_t crc_ccitt(uint16_t crc, const uint8_t *buffer, size_t len); +extern uint16_t crc_ccitt_false(uint16_t crc, const uint8_t *buffer, size_t len); + +static inline uint16_t crc_ccitt_byte(uint16_t crc, const uint8_t c) +{ + return (crc >> 8) ^ crc_ccitt_table[(crc ^ c) & 0xff]; +} + +static inline uint16_t crc_ccitt_false_byte(uint16_t crc, const uint8_t c) +{ + return (crc << 8) ^ crc_ccitt_false_table[(crc >> 8) ^ c]; +} + +#endif /* _CRC_CCITT_H */ diff --git a/util/crc-ccitt.c b/util/crc-ccitt.c new file mode 100644 index 0000000000..b981d8ac55 --- /dev/null +++ b/util/crc-ccitt.c @@ -0,0 +1,127 @@ +/* + * CRC16 (CCITT) Checksum Algorithm + * + * Copyright (c) 2021 Wind River Systems, Inc. + * + * Author: + * Bin Meng + * + * From Linux kernel v5.10 lib/crc-ccitt.c + * + * SPDX-License-Identifier: GPL-2.0-only + */ + +#include "qemu/osdep.h" +#include "qemu/crc-ccitt.h" + +/* + * This mysterious table is just the CRC of each possible byte. It can be + * computed using the standard bit-at-a-time methods. The polynomial can + * be seen in entry 128, 0x8408. This corresponds to x^0 + x^5 + x^12. + * Add the implicit x^16, and you have the standard CRC-CCITT. + */ +uint16_t const crc_ccitt_table[256] = { + 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, + 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, + 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, + 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, + 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, + 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, + 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, + 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, + 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, + 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, + 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, + 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, + 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, + 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, + 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, + 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, + 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, + 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, + 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, + 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, + 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, + 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, + 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, + 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, + 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, + 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, + 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, + 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, + 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, + 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, + 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, + 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 +}; + +/* + * Similar table to calculate CRC16 variant known as CRC-CCITT-FALSE + * Reflected bits order, does not augment final value. + */ +uint16_t const crc_ccitt_false_table[256] = { + 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, + 0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, + 0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, + 0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, + 0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, + 0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, + 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4, + 0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, + 0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, + 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, + 0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, + 0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, + 0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, + 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, + 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, + 0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, + 0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F, + 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, + 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, + 0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, + 0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, + 0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, + 0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C, + 0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, + 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB, + 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, + 0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, + 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, + 0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, + 0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, + 0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, + 0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0 +}; + +/** + * crc_ccitt - recompute the CRC (CRC-CCITT variant) + * for the data buffer + * + * @crc: previous CRC value + * @buffer: data pointer + * @len: number of bytes in the buffer + */ +uint16_t crc_ccitt(uint16_t crc, uint8_t const *buffer, size_t len) +{ + while (len--) { + crc = crc_ccitt_byte(crc, *buffer++); + } + return crc; +} + +/** + * crc_ccitt_false - recompute the CRC (CRC-CCITT-FALSE variant) + * for the data buffer + * + * @crc: previous CRC value + * @buffer: data pointer + * @len: number of bytes in the buffer + */ +uint16_t crc_ccitt_false(uint16_t crc, uint8_t const *buffer, size_t len) +{ + while (len--) { + crc = crc_ccitt_false_byte(crc, *buffer++); + } + return crc; +} diff --git a/util/meson.build b/util/meson.build index 540a605b78..05a376ae02 100644 --- a/util/meson.build +++ b/util/meson.build @@ -29,6 +29,7 @@ util_ss.add(files('qemu-config.c', 'notify.c')) util_ss.add(files('qemu-option.c', 'qemu-progress.c')) util_ss.add(files('keyval.c')) util_ss.add(files('crc32c.c')) +util_ss.add(files('crc-ccitt.c')) util_ss.add(files('uuid.c')) util_ss.add(files('getauxval.c')) util_ss.add(files('rcu.c')) -- 2.25.1