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Subject[PATCH 16/21] AMD IOMMU: add device detach function for IOMMU API
Date
Impact: add a generic function to detach devices from protection domains

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kernel/amd_iommu.c | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index d5581bb..60e268a 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1573,3 +1573,30 @@ static void amd_iommu_domain_destroy(struct iommu_domain *dom)

dom->priv = NULL;
}
+
+static void amd_iommu_detach_device(struct iommu_domain *dom,
+ struct device *dev)
+{
+ struct protection_domain *domain = dom->priv;
+ struct amd_iommu *iommu;
+ struct pci_dev *pdev;
+ u16 devid;
+
+ if (dev->bus != &pci_bus_type)
+ return;
+
+ pdev = to_pci_dev(dev);
+
+ devid = calc_devid(pdev->bus->number, pdev->devfn);
+
+ if (devid > 0)
+ detach_device(domain, devid);
+
+ iommu = amd_iommu_rlookup_table[devid];
+ if (!iommu)
+ return;
+
+ iommu_queue_inv_dev_entry(iommu, devid);
+ iommu_completion_wait(iommu);
+}
+
--
1.5.6.4



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