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=-8.6 required=3.0 tests=DATE_IN_PAST_06_12, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 EC65DC33C9E for ; Fri, 17 Jan 2020 22:32:37 +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 C3D3A21582 for ; Fri, 17 Jan 2020 22:32:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C3D3A21582 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=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 9852A8797A; Fri, 17 Jan 2020 22:32:37 +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 af-TaIGDTRPD; Fri, 17 Jan 2020 22:32:37 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id 32F508776C; Fri, 17 Jan 2020 22:32:37 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 1FCCFC18DC; Fri, 17 Jan 2020 22:32:37 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 53E2FC077D for ; Fri, 17 Jan 2020 22:32:36 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 4119722274 for ; Fri, 17 Jan 2020 22:32:36 +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 cNPNrLK7jKXt for ; Fri, 17 Jan 2020 22:32:35 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by silver.osuosl.org (Postfix) with ESMTPS id 50C95221AF for ; Fri, 17 Jan 2020 22:32:35 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Jan 2020 14:30:31 -0800 X-IronPort-AV: E=Sophos;i="5.70,331,1574150400"; d="scan'208";a="219052215" Received: from nsgsw-rhel7p6.lm.intel.com ([10.232.116.83]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Jan 2020 14:30:30 -0800 From: Jon Derrick To: , Bjorn Helgaas , Lorenzo Pieralisi Subject: [PATCH v4 4/7] iommu/vt-d: Use pci_real_dma_dev() for mapping Date: Fri, 17 Jan 2020 09:27:26 -0700 Message-Id: <1579278449-174098-5-git-send-email-jonathan.derrick@intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1579278449-174098-1-git-send-email-jonathan.derrick@intel.com> References: <1579278449-174098-1-git-send-email-jonathan.derrick@intel.com> Cc: iommu@lists.linux-foundation.org, Keith Busch , David Woodhouse , Christoph Hellwig , Jon Derrick 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: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" The PCI device may have a DMA requester on another bus, such as VMD subdevices needing to use the VMD endpoint. This case requires the real DMA device when mapping to IOMMU. Signed-off-by: Jon Derrick --- drivers/iommu/intel-iommu.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 0c8d81f..01a1b0f 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -782,6 +782,8 @@ static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devf return NULL; #endif + pdev = pci_real_dma_dev(dev); + /* VFs aren't listed in scope tables; we need to look up * the PF instead to find the IOMMU. */ pf_pdev = pci_physfn(pdev); @@ -2428,6 +2430,13 @@ static struct dmar_domain *find_domain(struct device *dev) dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO)) return NULL; + if (dev_is_pci(dev)) { + struct pci_dev *pdev; + + pdev = pci_real_dma_dev(to_pci_dev(dev)); + dev = &pdev->dev; + } + /* No lock here, assumes no domain exit in normal case */ info = dev->archdata.iommu; if (likely(info)) -- 1.8.3.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu