Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754501Ab2E3UTm (ORCPT ); Wed, 30 May 2012 16:19:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:62468 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754368Ab2E3UTj (ORCPT ); Wed, 30 May 2012 16:19:39 -0400 From: Alex Williamson Subject: [PATCH v2 4/7] intel-iommu: Support IOMMU groups To: joerg.roedel@amd.com, dwmw2@infradead.org, iommu@lists.linux-foundation.org Cc: bhelgaas@google.com, benh@kernel.crashing.org, aik@ozlabs.ru, david@gibson.dropbear.id.au, konrad.wilk@oracle.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, gregkh@linuxfoundation.org, ddutile@redhat.com, alex.williamson@redhat.com, liuj97@gmail.com Date: Wed, 30 May 2012 14:19:19 -0600 Message-ID: <20120530201919.31527.45209.stgit@bling.home> In-Reply-To: <20120530201424.31527.33142.stgit@bling.home> References: <20120530201424.31527.33142.stgit@bling.home> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2293 Lines: 77 Add IOMMU group support to Intel VT-d code. This driver sets up devices ondemand, so make use of the add_device/remove_device callbacks in IOMMU API to manage setting up the groups. Signed-off-by: Alex Williamson --- drivers/iommu/intel-iommu.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index c62f2df..4a43452 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -4090,6 +4090,47 @@ static int intel_iommu_domain_has_cap(struct iommu_domain *domain, return 0; } +static int intel_iommu_add_device(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct pci_dev *bridge, *dma_pdev; + struct iommu_group *group; + int ret; + + if (!device_to_iommu(pci_domain_nr(pdev->bus), + pdev->bus->number, pdev->devfn)) + return -ENODEV; + + bridge = pci_find_upstream_pcie_bridge(pdev); + if (bridge) { + if (pci_is_pcie(bridge)) + dma_pdev = pci_get_domain_bus_and_slot( + pci_domain_nr(pdev->bus), + bridge->subordinate->number, 0); + else + dma_pdev = pci_dev_get(bridge); + } else + dma_pdev = pci_dev_get(pdev); + + group = iommu_group_get(&dma_pdev->dev); + pci_dev_put(dma_pdev); + if (!group) { + group = iommu_group_alloc(); + if (IS_ERR(group)) + return PTR_ERR(group); + } + + ret = iommu_group_add_device(group, dev); + + iommu_group_put(group); + return ret; +} + +static void intel_iommu_remove_device(struct device *dev) +{ + iommu_group_remove_device(dev); +} + static struct iommu_ops intel_iommu_ops = { .domain_init = intel_iommu_domain_init, .domain_destroy = intel_iommu_domain_destroy, @@ -4099,6 +4140,8 @@ static struct iommu_ops intel_iommu_ops = { .unmap = intel_iommu_unmap, .iova_to_phys = intel_iommu_iova_to_phys, .domain_has_cap = intel_iommu_domain_has_cap, + .add_device = intel_iommu_add_device, + .remove_device = intel_iommu_remove_device, .pgsize_bitmap = INTEL_IOMMU_PGSIZES, }; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/