From nobody Mon Feb 9 23:03:02 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1600941939; cv=none; d=zohomail.com; s=zohoarc; b=mKf8Cfy1PWSmEpK5EmKHXDqPhHrcnfSvUMRMQJ0MxIhIty6dqw3HuG2mUMEi4GK7ClWFtkCP0pvFi0G3JArbhFPGbLzOb3szp36zfppU9+8RsHrPDH7JRqRPKKc4IYRM9VKu8CmR6o2oA4ut+zgv9FhdC2DKqZCUHC/YTAnpZWs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1600941939; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=f8IF91sjN25lbtFmQe6SfV4tAQBciSF2GxvmgEJFKxE=; b=hYMUQv+qG28ssc3XZnoGfip7sp4o4mJB3pLBP7duZK97gT8jn6B0p24HVXeUtkp7B0TmHj8ikhbQooI8KHLo4+DnlARKmbIqpjeLGENn3wooLqrzp2dXGkhitRPro6XjWsmiYMsL1qUcnzL8zEkz9P9W2gwnvgAa75O6dVqNzcs= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1600941939315963.0572330813106; Thu, 24 Sep 2020 03:05:39 -0700 (PDT) Received: from localhost ([::1]:56910 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLO8A-0001ds-0k for importer@patchew.org; Thu, 24 Sep 2020 06:05:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39878) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLNUz-0003Oc-S7 for qemu-devel@nongnu.org; Thu, 24 Sep 2020 05:25:09 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:60444) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLNUq-0006I0-0a for qemu-devel@nongnu.org; Thu, 24 Sep 2020 05:25:09 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-521-ATeukPI1NvuzkaV6HuHQVg-1; Thu, 24 Sep 2020 05:24:55 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 446771882FC6; Thu, 24 Sep 2020 09:24:54 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id C6EC455764; Thu, 24 Sep 2020 09:24:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600939498; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=f8IF91sjN25lbtFmQe6SfV4tAQBciSF2GxvmgEJFKxE=; b=hH94C2HVkLWAHTeN9qTvW/X43EbuHT7jpWzimEzlWhtV1swQQOSOQWDy0yHIowSvY+YaPQ o1sHd7DUytV/d8NwOTEbKvuhVAr9Z+H5sPaMrxyU4luQ3PqM9oYYfzXT0HpSFK8HJzNQ1T Aw0XOw3nos6ipEqs/ixhKZbYh2FL+rE= X-MC-Unique: ATeukPI1NvuzkaV6HuHQVg-1 From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 88/92] net/can: Add can_dlc2len and can_len2dlc for CAN FD. Date: Thu, 24 Sep 2020 05:23:10 -0400 Message-Id: <20200924092314.1722645-89-pbonzini@redhat.com> In-Reply-To: <20200924092314.1722645-1-pbonzini@redhat.com> References: <20200924092314.1722645-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.228, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: Vikram Garhwal , Jan Charvat , Pavel Pisa Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Jan Charvat Signed-off-by: Jan Charvat Signed-off-by: Pavel Pisa Reviewed-by: Vikram Garhwal Message-Id: <0a2efc6ef9c458505952ed230e49ae25cad7f324.1600069689.git.pisa@c= mp.felk.cvut.cz> Signed-off-by: Paolo Bonzini --- include/net/can_emu.h | 4 ++++ net/can/can_core.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+) diff --git a/include/net/can_emu.h b/include/net/can_emu.h index cab98ee8ec..6f9b206bb5 100644 --- a/include/net/can_emu.h +++ b/include/net/can_emu.h @@ -122,4 +122,8 @@ int can_bus_client_set_filters(CanBusClientState *, const struct qemu_can_filter *filters, size_t filters_cnt); =20 +uint8_t can_dlc2len(uint8_t can_dlc); + +uint8_t can_len2dlc(uint8_t len); + #endif diff --git a/net/can/can_core.c b/net/can/can_core.c index 90f4d8576a..0115d78794 100644 --- a/net/can/can_core.c +++ b/net/can/can_core.c @@ -33,6 +33,42 @@ #include "net/can_emu.h" #include "qom/object_interfaces.h" =20 +/* CAN DLC to real data length conversion helpers */ + +static const uint8_t dlc2len[] =3D { + 0, 1, 2, 3, 4, 5, 6, 7, + 8, 12, 16, 20, 24, 32, 48, 64 +}; + +/* get data length from can_dlc with sanitized can_dlc */ +uint8_t can_dlc2len(uint8_t can_dlc) +{ + return dlc2len[can_dlc & 0x0F]; +} + +static const uint8_t len2dlc[] =3D { + 0, 1, 2, 3, 4, 5, 6, 7, 8, /* 0 - 8 */ + 9, 9, 9, 9, /* 9 - 12 */ + 10, 10, 10, 10, /* 13 - 16 */ + 11, 11, 11, 11, /* 17 - 20 */ + 12, 12, 12, 12, /* 21 - 24 */ + 13, 13, 13, 13, 13, 13, 13, 13, /* 25 - 32 */ + 14, 14, 14, 14, 14, 14, 14, 14, /* 33 - 40 */ + 14, 14, 14, 14, 14, 14, 14, 14, /* 41 - 48 */ + 15, 15, 15, 15, 15, 15, 15, 15, /* 49 - 56 */ + 15, 15, 15, 15, 15, 15, 15, 15 /* 57 - 64 */ +}; + +/* map the sanitized data length to an appropriate data length code */ +uint8_t can_len2dlc(uint8_t len) +{ + if (unlikely(len > 64)) { + return 0xF; + } + + return len2dlc[len]; +} + struct CanBusState { Object object; =20 --=20 2.26.2