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Subject[PATCH 3/9] add frontend implementation for the IOMMU API
Date
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
drivers/base/iommu.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 94 insertions(+), 0 deletions(-)
create mode 100644 drivers/base/iommu.c
diff --git a/drivers/base/iommu.c b/drivers/base/iommu.c
new file mode 100644
index 0000000..7250b9c
--- /dev/null
+++ b/drivers/base/iommu.c
@@ -0,0 +1,94 @@
+/*
+ * 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(struct device *dev)
+{
+ struct iommu_domain *domain;
+ int ret;
+
+ domain = kmalloc(sizeof(*domain), GFP_KERNEL);
+ if (!domain)
+ return NULL;
+
+ ret = iommu_ops->domain_init(domain, dev);
+ 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_address(struct iommu_domain *domain,
+ dma_addr_t iova, phys_addr_t paddr,
+ size_t size, int prot)
+{
+ return iommu_ops->map(domain, iova, paddr, size, prot);
+}
+EXPORT_SYMBOL_GPL(iommu_map_address);
+
+phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
+ dma_addr_t iova)
+{
+ return iommu_ops->iova_to_phys(domain, iova);
+}
+EXPORT_SYMBOL_GPL(iommu_iova_to_phys);
--
1.5.6.4



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