1 files changed, 100 insertions, 0 deletions

diff --git a/drivers/base/iommu.c b/drivers/base/iommu.c
new file mode 100644
index 00000000000..5e039d4f877
--- /dev/null
+++ b/drivers/base/iommu.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
+ * Author: Joerg Roedel <joerg.roedel@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <linux/bug.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/iommu.h>
+
+static struct iommu_ops *iommu_ops;
+
+void register_iommu(struct iommu_ops *ops)
+{
+        if (iommu_ops)
+                BUG();
+
+        iommu_ops = ops;
+}
+
+bool iommu_found()
+{
+        return iommu_ops != NULL;
+}
+EXPORT_SYMBOL_GPL(iommu_found);
+
+struct iommu_domain *iommu_domain_alloc(void)
+{
+        struct iommu_domain *domain;
+        int ret;
+
+        domain = kmalloc(sizeof(*domain), GFP_KERNEL);
+        if (!domain)
+                return NULL;
+
+        ret = iommu_ops->domain_init(domain);
+        if (ret)
+                goto out_free;
+
+        return domain;
+
+out_free:
+        kfree(domain);
+
+        return NULL;
+}
+EXPORT_SYMBOL_GPL(iommu_domain_alloc);
+
+void iommu_domain_free(struct iommu_domain *domain)
+{
+        iommu_ops->domain_destroy(domain);
+        kfree(domain);
+}
+EXPORT_SYMBOL_GPL(iommu_domain_free);
+
+int iommu_attach_device(struct iommu_domain *domain, struct device *dev)
+{
+        return iommu_ops->attach_dev(domain, dev);
+}
+EXPORT_SYMBOL_GPL(iommu_attach_device);
+
+void iommu_detach_device(struct iommu_domain *domain, struct device *dev)
+{
+        iommu_ops->detach_dev(domain, dev);
+}
+EXPORT_SYMBOL_GPL(iommu_detach_device);
+
+int iommu_map_range(struct iommu_domain *domain, unsigned long iova,
+                    phys_addr_t paddr, size_t size, int prot)
+{
+        return iommu_ops->map(domain, iova, paddr, size, prot);
+}
+EXPORT_SYMBOL_GPL(iommu_map_range);
+
+void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova,
+                      size_t size)
+{
+        iommu_ops->unmap(domain, iova, size);
+}
+EXPORT_SYMBOL_GPL(iommu_unmap_range);
+
+phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
+                               unsigned long iova)
+{
+        return iommu_ops->iova_to_phys(domain, iova);
+}
+EXPORT_SYMBOL_GPL(iommu_iova_to_phys);