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authorJoerg Roedel <joerg.roedel@amd.com>2008-12-08 12:05:55 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 14:11:55 +0100
commit6d98cd8043c13438e4ca8a9464893f0224198a30 (patch)
tree2ffaa5b1391188fe99a306473650d3b18bb50e15
parente275a2a0fc9e2168b15f6c7814e30b7ad58b1c7c (diff)
AMD IOMMU: add domain cleanup helper function
Impact: add a function to remove all devices from a domain Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
-rw-r--r--arch/x86/kernel/amd_iommu.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 140875b3f6e..5d3f085289e 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1579,3 +1579,31 @@ free_domains:
return ret;
}
+
+/*****************************************************************************
+ *
+ * The following functions belong to the exported interface of AMD IOMMU
+ *
+ * This interface allows access to lower level functions of the IOMMU
+ * like protection domain handling and assignement of devices to domains
+ * which is not possible with the dma_ops interface.
+ *
+ *****************************************************************************/
+
+#ifdef CONFIG_IOMMU_API
+
+static void cleanup_domain(struct protection_domain *domain)
+{
+ unsigned long flags;
+ u16 devid;
+
+ write_lock_irqsave(&amd_iommu_devtable_lock, flags);
+
+ for (devid = 0; devid <= amd_iommu_last_bdf; ++devid)
+ if (amd_iommu_pd_table[devid] == domain)
+ __detach_device(domain, devid);
+
+ write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
+}
+
+#endif