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 E095AC282DD for ; Fri, 10 Jan 2020 16:28:43 +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 9833A206ED for ; Fri, 10 Jan 2020 16:28:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9833A206ED Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org 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 7CA5187F71; Fri, 10 Jan 2020 16:28:43 +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 8ghbadxio69y; Fri, 10 Jan 2020 16:28:42 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id B1DA287ED2; Fri, 10 Jan 2020 16:28:42 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 9C3E6C1796; Fri, 10 Jan 2020 16:28:42 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id C7DA1C0881 for ; Fri, 10 Jan 2020 16:28:40 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id BEFEA869C7 for ; Fri, 10 Jan 2020 16:28:40 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 87eM0T7oIvgx for ; Fri, 10 Jan 2020 16:28:39 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by whitealder.osuosl.org (Postfix) with ESMTPS id 32C59869B4 for ; Fri, 10 Jan 2020 16:28:39 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 71D0C546; Fri, 10 Jan 2020 17:28:34 +0100 (CET) Date: Fri, 10 Jan 2020 17:28:32 +0100 From: Joerg Roedel To: Lu Baolu Subject: Re: Regression iommu/vt-d bounce buffer Message-ID: <20200110162831.GC28359@8bytes.org> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) 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-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hi Baolu, any ideas here? 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