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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2CB70C4332F for ; Fri, 1 Oct 2021 12:25:13 +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 CA06261A55 for ; Fri, 1 Oct 2021 12:25:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org CA06261A55 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:44036 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mWHbD-0001OX-Cw for qemu-devel@archiver.kernel.org; Fri, 01 Oct 2021 08:25:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42234) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mWHYK-0005jN-HM for qemu-devel@nongnu.org; Fri, 01 Oct 2021 08:22:13 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:57725) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mWHYG-0006jh-Fg for qemu-devel@nongnu.org; Fri, 01 Oct 2021 08:22:11 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1633090927; 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: in-reply-to:in-reply-to:references:references; bh=qwycd8uwMcLpdsy3jyxEf52XV6MJ3dLAdS9MefEAvaY=; b=Zp8zg5rsxfTWmK/WliyJj2Eph5PYC8X/MC4uaXkJb+R3sj8pV2wQG8tjMfAagupN/P/rQg Rof6SukmDnJvBwW6gUO05MFivgvsknhDowRttAOs2MVRBaLj5lCLIA0DiCWeonKjKuc8C2 B0pI3hg1byrOBDVrmQ8I4qrFOgZieXY= 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-548-gSVeaAGsPh-Qv-kQuI80Vw-1; Fri, 01 Oct 2021 08:22:04 -0400 X-MC-Unique: gSVeaAGsPh-Qv-kQuI80Vw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 526F41084687; Fri, 1 Oct 2021 12:22:03 +0000 (UTC) Received: from sirius.home.kraxel.org (unknown [10.39.193.134]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1C37160C81; Fri, 1 Oct 2021 12:22:02 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id E584F18007AC; Fri, 1 Oct 2021 14:22:00 +0200 (CEST) Date: Fri, 1 Oct 2021 14:22:00 +0200 From: Gerd Hoffmann To: BALATON Zoltan Subject: Re: OHCI/usb pass through Message-ID: <20211001122200.wjmzcheu4aunlhq7@sirius.home.kraxel.org> References: <771189a-95c4-5144-ba7-478d28dfd5ef@eik.bme.hu> <20211001043943.2cxyxjfgmr5duicl@sirius.home.kraxel.org> <81cbbb94-c4dd-dde2-d98a-7487269169cf@eik.bme.hu> MIME-Version: 1.0 In-Reply-To: <81cbbb94-c4dd-dde2-d98a-7487269169cf@eik.bme.hu> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kraxel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=170.10.133.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-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: Mark Cave-Ayland , qemu-devel@nongnu.org, Howard Spoelstra Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi, > > > We can get the endpoint from a packet and from ohci so > > > I wonder if we can get the active packet from ep->queue (and how to do that) > > > > I think ohci never looks beyond the active td so there should never be > > more than one packet on the list. > > OK, how to get the packet from that QTAILQ list? If there are multiple > packets is the active one first or last? How to get that? I could try to > find the answers in the code but I realy did not want to spend much time > with it just trying to help Howard so I'd like to ask for some help with > this. See include/qemu/queue.h, QTAILQ_FIRST() is what you need. Returns NULL when the queue is empty. There is also a separate QLIST_EMPTY() helper. grepping in hw/usb/*.c should find you code examples in other host adapters code. take care, Gerd