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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 D40B9C33CAB for ; Mon, 13 Jan 2020 02:38:34 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (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 9EF2620678 for ; Mon, 13 Jan 2020 02:38:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9EF2620678 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 6848C86DE2; Mon, 13 Jan 2020 02:38:34 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8A5DTdCGWEFp; Mon, 13 Jan 2020 02:38:33 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id 7A3C286DC6; Mon, 13 Jan 2020 02:38:33 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5D5E8C1D80; Mon, 13 Jan 2020 02:38:33 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 645C0C077D for ; Mon, 13 Jan 2020 02:38:32 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 4CA9E20130 for ; Mon, 13 Jan 2020 02:38:32 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id a00VLp4xsJVy for ; Mon, 13 Jan 2020 02:38:31 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by silver.osuosl.org (Postfix) with ESMTPS id 8FB3520033 for ; Mon, 13 Jan 2020 02:38:31 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Jan 2020 18:38:31 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,427,1571727600"; d="scan'208";a="247581010" Received: from allen-box.sh.intel.com (HELO [10.239.159.136]) ([10.239.159.136]) by fmsmga004.fm.intel.com with ESMTP; 12 Jan 2020 18:38:30 -0800 Subject: Re: Regression iommu/vt-d bounce buffer To: Joerg Roedel References: <20200110162831.GC28359@8bytes.org> From: Lu Baolu Message-ID: <687b679b-76c7-15b0-1399-098e0afb3267@linux.intel.com> Date: Mon, 13 Jan 2020 10:37:10 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <20200110162831.GC28359@8bytes.org> Content-Language: en-US Cc: Frederik Schwan , David Woodhouse , iommu@lists.linux-foundation.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hi Joerg, On 1/11/20 12:28 AM, Joerg Roedel wrote: > Hi Baolu, > > any ideas here? I am looking at this issue. Best regards, baolu > > On Mon, Jan 06, 2020 at 04:43:05PM +0100, Frederik Schwan wrote: >> Hello people, >> since the introduction of the bounce buffer, a regression with TB3 devices has been introduced. >> USB devices attached to TB3 refuse to work since. Removing the commits that introduced the bounce buffer, fixes the issue. >> >> Commits: >> 3b53034c268d550d9e8522e613a14ab53b8840d8 >> c5a5dc4cbbf4540c1891cdb2b70cf469405ea61f >> cfb94a372f2d4ee226247447c863f8709863d170 >> e5e04d051979dbd636a99099b7a595093c50a4bc >> >> >> An excerpt of the trace: >>> [ +0,000005] WARNING: CPU: 10 PID: 0 at drivers/iommu/intel-iommu.c:3916 bounce_unmap_single+0x103/0x110 >>> [...] >>> [ +0,000001] Call Trace: >>> [ +0,000002] >>> [ +0,000003] usb_hcd_unmap_urb_setup_for_dma+0x9f/0xe0 >>> [ +0,000001] usb_hcd_unmap_urb_for_dma+0x1c/0x170 >>> [ +0,000002] __usb_hcd_giveback_urb+0x36/0x120 >>> [ +0,000008] xhci_giveback_urb_in_irq.isra.0+0x72/0x100 [xhci_hcd] >>> [ +0,000007] xhci_td_cleanup+0x101/0x140 [xhci_hcd] >>> [ +0,000007] xhci_irq+0xbf0/0x1db0 [xhci_hcd] >>> [ +0,000005] __handle_irq_event_percpu+0x44/0x1b0 >>> [ +0,000002] handle_irq_event_percpu+0x34/0x80 >>> [ +0,000002] handle_irq_event+0x37/0x54 >>> [ +0,000002] handle_edge_irq+0xae/0x1f0 >>> [ +0,000002] do_IRQ+0x84/0x140 >>> [ +0,000003] common_interrupt+0xf/0xf >>> [ +0,000001] >> >> Dmesg log and further information have been posted here: https://bugzilla.kernel.org/show_bug.cgi?id=205893 >> >> Cheers, >> Frederik >> > > > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu