Initial commit from HTC m7ul-3.4.10-jb-crc-ddcfb8c
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
new file mode 100644
index 0000000..313f514
--- /dev/null
+++ b/include/linux/iommu.h
@@ -0,0 +1,193 @@
+/*
+ * 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
+ */
+
+#ifndef __LINUX_IOMMU_H
+#define __LINUX_IOMMU_H
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/scatterlist.h>
+
+#define IOMMU_READ (1)
+#define IOMMU_WRITE (2)
+#define IOMMU_CACHE (4)
+
+struct iommu_ops;
+struct bus_type;
+struct device;
+struct iommu_domain;
+
+#define IOMMU_FAULT_READ 0x0
+#define IOMMU_FAULT_WRITE 0x1
+
+typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
+ struct device *, unsigned long, int);
+
+struct iommu_domain {
+ struct iommu_ops *ops;
+ void *priv;
+ iommu_fault_handler_t handler;
+};
+
+#define IOMMU_CAP_CACHE_COHERENCY 0x1
+#define IOMMU_CAP_INTR_REMAP 0x2
+
+#ifdef CONFIG_IOMMU_API
+
+struct iommu_ops {
+ int (*domain_init)(struct iommu_domain *domain, int flags);
+ void (*domain_destroy)(struct iommu_domain *domain);
+ int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
+ void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
+ int (*map)(struct iommu_domain *domain, unsigned long iova,
+ phys_addr_t paddr, size_t size, int prot);
+ size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
+ size_t size);
+ int (*map_range)(struct iommu_domain *domain, unsigned int iova,
+ struct scatterlist *sg, unsigned int len, int prot);
+ int (*unmap_range)(struct iommu_domain *domain, unsigned int iova,
+ unsigned int len);
+ phys_addr_t (*iova_to_phys)(struct iommu_domain *domain,
+ unsigned long iova);
+ int (*domain_has_cap)(struct iommu_domain *domain,
+ unsigned long cap);
+ phys_addr_t (*get_pt_base_addr)(struct iommu_domain *domain);
+ int (*device_group)(struct device *dev, unsigned int *groupid);
+ unsigned long pgsize_bitmap;
+};
+
+extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops);
+extern bool iommu_present(struct bus_type *bus);
+extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus, int flags);
+extern void iommu_domain_free(struct iommu_domain *domain);
+extern int iommu_attach_device(struct iommu_domain *domain,
+ struct device *dev);
+extern void iommu_detach_device(struct iommu_domain *domain,
+ struct device *dev);
+extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
+ phys_addr_t paddr, size_t size, int prot);
+extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
+ size_t size);
+extern int iommu_map_range(struct iommu_domain *domain, unsigned int iova,
+ struct scatterlist *sg, unsigned int len, int prot);
+extern int iommu_unmap_range(struct iommu_domain *domain, unsigned int iova,
+ unsigned int len);
+extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
+ unsigned long iova);
+extern int iommu_domain_has_cap(struct iommu_domain *domain,
+ unsigned long cap);
+extern phys_addr_t iommu_get_pt_base_addr(struct iommu_domain *domain);
+extern void iommu_set_fault_handler(struct iommu_domain *domain,
+ iommu_fault_handler_t handler);
+extern int iommu_device_group(struct device *dev, unsigned int *groupid);
+
+static inline int report_iommu_fault(struct iommu_domain *domain,
+ struct device *dev, unsigned long iova, int flags)
+{
+ int ret = -ENOSYS;
+
+ if (domain->handler)
+ ret = domain->handler(domain, dev, iova, flags);
+
+ return ret;
+}
+
+#else
+
+struct iommu_ops {};
+
+static inline bool iommu_present(struct bus_type *bus)
+{
+ return false;
+}
+
+static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus, int flags)
+{
+ return NULL;
+}
+
+static inline void iommu_domain_free(struct iommu_domain *domain)
+{
+}
+
+static inline int iommu_attach_device(struct iommu_domain *domain,
+ struct device *dev)
+{
+ return -ENODEV;
+}
+
+static inline void iommu_detach_device(struct iommu_domain *domain,
+ struct device *dev)
+{
+}
+
+static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
+ phys_addr_t paddr, int gfp_order, int prot)
+{
+ return -ENODEV;
+}
+
+static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
+ int gfp_order)
+{
+ return -ENODEV;
+}
+
+static inline int iommu_map_range(struct iommu_domain *domain,
+ unsigned int iova, struct scatterlist *sg,
+ unsigned int len, int prot)
+{
+ return -ENODEV;
+}
+
+static inline int iommu_unmap_range(struct iommu_domain *domain,
+ unsigned int iova, unsigned int len)
+{
+ return -ENODEV;
+}
+
+static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
+ unsigned long iova)
+{
+ return 0;
+}
+
+static inline int domain_has_cap(struct iommu_domain *domain,
+ unsigned long cap)
+{
+ return 0;
+}
+
+static inline phys_addr_t iommu_get_pt_base_addr(struct iommu_domain *domain)
+{
+ return 0;
+}
+
+static inline void iommu_set_fault_handler(struct iommu_domain *domain,
+ iommu_fault_handler_t handler)
+{
+}
+
+static inline int iommu_device_group(struct device *dev, unsigned int *groupid)
+{
+ return -ENODEV;
+}
+
+#endif
+
+#endif