Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (33 commits)
  iommu/core: Remove global iommu_ops and register_iommu
  iommu/msm: Use bus_set_iommu instead of register_iommu
  iommu/omap: Use bus_set_iommu instead of register_iommu
  iommu/vt-d: Use bus_set_iommu instead of register_iommu
  iommu/amd: Use bus_set_iommu instead of register_iommu
  iommu/core: Use bus->iommu_ops in the iommu-api
  iommu/core: Convert iommu_found to iommu_present
  iommu/core: Add bus_type parameter to iommu_domain_alloc
  Driver core: Add iommu_ops to bus_type
  iommu/core: Define iommu_ops and register_iommu only with CONFIG_IOMMU_API
  iommu/amd: Fix wrong shift direction
  iommu/omap: always provide iommu debug code
  iommu/core: let drivers know if an iommu fault handler isn't installed
  iommu/core: export iommu_set_fault_handler()
  iommu/omap: Fix build error with !IOMMU_SUPPORT
  iommu/omap: Migrate to the generic fault report mechanism
  iommu/core: Add fault reporting mechanism
  iommu/core: Use PAGE_SIZE instead of hard-coded value
  iommu/core: use the existing IS_ALIGNED macro
  iommu/msm: ->unmap() should return order of unmapped page
  ...

Fixup trivial conflicts in drivers/iommu/Makefile: "move omap iommu to
dedicated iommu folder" vs "Rename the DMAR and INTR_REMAP config
options" just happened to touch lines next to each other.

9 files changed, 71 insertions, 2499 deletions

diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index 6f4edd3408c2..aa59f4247dc5 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -134,18 +134,6 @@ config OMAP_MBOX_KFIFO_SIZE
 	  This can also be changed at runtime (via the mbox_kfifo_size
 	  module parameter).
 
-config OMAP_IOMMU
-	tristate
-
-config OMAP_IOMMU_DEBUG
-       tristate "Export OMAP IOMMU internals in DebugFS"
-       depends on OMAP_IOMMU && DEBUG_FS
-       help
-         Select this to see extensive information about
-         the internal state of OMAP IOMMU in debugfs.
-
-         Say N unless you know you need this.
-
 config OMAP_IOMMU_IVA2
 	bool
 
diff --git a/arch/arm/plat-omap/Makefile b/arch/arm/plat-omap/Makefile
index f0233e6abcdf..985262242f25 100644
--- a/arch/arm/plat-omap/Makefile
+++ b/arch/arm/plat-omap/Makefile
@@ -18,8 +18,6 @@ obj-$(CONFIG_ARCH_OMAP3) += omap_device.o
 obj-$(CONFIG_ARCH_OMAP4) += omap_device.o
 
 obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
-obj-$(CONFIG_OMAP_IOMMU) += iommu.o iovmm.o
-obj-$(CONFIG_OMAP_IOMMU_DEBUG) += iommu-debug.o
 
 obj-$(CONFIG_CPU_FREQ) += cpu-omap.o
 obj-$(CONFIG_OMAP_DM_TIMER) += dmtimer.o
diff --git a/arch/arm/plat-omap/include/plat/iommu.h b/arch/arm/plat-omap/include/plat/iommu.h
index 174f1b9c8c03..a1d79ee19250 100644
--- a/arch/arm/plat-omap/include/plat/iommu.h
+++ b/arch/arm/plat-omap/include/plat/iommu.h
@@ -25,16 +25,17 @@ struct iotlb_entry {
 	};
 };
 
-struct iommu {
+struct omap_iommu {
 	const char	*name;
 	struct module	*owner;
 	struct clk	*clk;
 	void __iomem	*regbase;
 	struct device	*dev;
 	void		*isr_priv;
+	struct iommu_domain *domain;
 
 	unsigned int	refcount;
-	struct mutex	iommu_lock;	/* global for this whole object */
+	spinlock_t	iommu_lock;	/* global for this whole object */
 
 	/*
 	 * We don't change iopgd for a situation like pgd for a task,
@@ -48,8 +49,6 @@ struct iommu {
 	struct list_head	mmap;
 	struct mutex		mmap_lock; /* protect mmap */
 
-	int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs, void *priv);
-
 	void *ctx; /* iommu context: registres saved area */
 	u32 da_start;
 	u32 da_end;
@@ -81,25 +80,27 @@ struct iotlb_lock {
 struct iommu_functions {
 	unsigned long	version;
 
-	int (*enable)(struct iommu *obj);
-	void (*disable)(struct iommu *obj);
-	void (*set_twl)(struct iommu *obj, bool on);
-	u32 (*fault_isr)(struct iommu *obj, u32 *ra);
+	int (*enable)(struct omap_iommu *obj);
+	void (*disable)(struct omap_iommu *obj);
+	void (*set_twl)(struct omap_iommu *obj, bool on);
+	u32 (*fault_isr)(struct omap_iommu *obj, u32 *ra);
 
-	void (*tlb_read_cr)(struct iommu *obj, struct cr_regs *cr);
-	void (*tlb_load_cr)(struct iommu *obj, struct cr_regs *cr);
+	void (*tlb_read_cr)(struct omap_iommu *obj, struct cr_regs *cr);
+	void (*tlb_load_cr)(struct omap_iommu *obj, struct cr_regs *cr);
 
-	struct cr_regs *(*alloc_cr)(struct iommu *obj, struct iotlb_entry *e);
+	struct cr_regs *(*alloc_cr)(struct omap_iommu *obj,
+							struct iotlb_entry *e);
 	int (*cr_valid)(struct cr_regs *cr);
 	u32 (*cr_to_virt)(struct cr_regs *cr);
 	void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
-	ssize_t (*dump_cr)(struct iommu *obj, struct cr_regs *cr, char *buf);
+	ssize_t (*dump_cr)(struct omap_iommu *obj, struct cr_regs *cr,
+							char *buf);
 
 	u32 (*get_pte_attr)(struct iotlb_entry *e);
 
-	void (*save_ctx)(struct iommu *obj);
-	void (*restore_ctx)(struct iommu *obj);
-	ssize_t (*dump_ctx)(struct iommu *obj, char *buf, ssize_t len);
+	void (*save_ctx)(struct omap_iommu *obj);
+	void (*restore_ctx)(struct omap_iommu *obj);
+	ssize_t (*dump_ctx)(struct omap_iommu *obj, char *buf, ssize_t len);
 };
 
 struct iommu_platform_data {
@@ -150,40 +151,31 @@ struct iommu_platform_data {
 /*
  * global functions
  */
-extern u32 iommu_arch_version(void);
-
-extern void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
-extern u32 iotlb_cr_to_virt(struct cr_regs *cr);
-
-extern int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e);
-extern void iommu_set_twl(struct iommu *obj, bool on);
-extern void flush_iotlb_page(struct iommu *obj, u32 da);
-extern void flush_iotlb_range(struct iommu *obj, u32 start, u32 end);
-extern void flush_iotlb_all(struct iommu *obj);
-
-extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
-extern void iopgtable_lookup_entry(struct iommu *obj, u32 da, u32 **ppgd,
-				   u32 **ppte);
-extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
-
-extern int iommu_set_da_range(struct iommu *obj, u32 start, u32 end);
-extern struct iommu *iommu_get(const char *name);
-extern void iommu_put(struct iommu *obj);
-extern int iommu_set_isr(const char *name,
-			 int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs,
+extern u32 omap_iommu_arch_version(void);
+
+extern void omap_iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
+
+extern int
+omap_iopgtable_store_entry(struct omap_iommu *obj, struct iotlb_entry *e);
+
+extern int omap_iommu_set_isr(const char *name,
+		 int (*isr)(struct omap_iommu *obj, u32 da, u32 iommu_errs,
 				    void *priv),
 			 void *isr_priv);
 
-extern void iommu_save_ctx(struct iommu *obj);
-extern void iommu_restore_ctx(struct iommu *obj);
+extern void omap_iommu_save_ctx(struct omap_iommu *obj);
+extern void omap_iommu_restore_ctx(struct omap_iommu *obj);
 
-extern int install_iommu_arch(const struct iommu_functions *ops);
-extern void uninstall_iommu_arch(const struct iommu_functions *ops);
+extern int omap_install_iommu_arch(const struct iommu_functions *ops);
+extern void omap_uninstall_iommu_arch(const struct iommu_functions *ops);
 
-extern int foreach_iommu_device(void *data,
+extern int omap_foreach_iommu_device(void *data,
 				int (*fn)(struct device *, void *));
 
-extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t len);
-extern size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t len);
+extern ssize_t
+omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len);
+extern size_t
+omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t len);
+struct device *omap_find_iommu_device(const char *name);
 
 #endif /* __MACH_IOMMU_H */
diff --git a/arch/arm/plat-omap/include/plat/iommu2.h b/arch/arm/plat-omap/include/plat/iommu2.h
index 10ad05f410e9..d4116b595e40 100644
--- a/arch/arm/plat-omap/include/plat/iommu2.h
+++ b/arch/arm/plat-omap/include/plat/iommu2.h
@@ -83,12 +83,12 @@
 /*
  * register accessors
  */
-static inline u32 iommu_read_reg(struct iommu *obj, size_t offs)
+static inline u32 iommu_read_reg(struct omap_iommu *obj, size_t offs)
 {
 	return __raw_readl(obj->regbase + offs);
 }
 
-static inline void iommu_write_reg(struct iommu *obj, u32 val, size_t offs)
+static inline void iommu_write_reg(struct omap_iommu *obj, u32 val, size_t offs)
 {
 	__raw_writel(val, obj->regbase + offs);
 }
diff --git a/arch/arm/plat-omap/iopgtable.h b/arch/arm/plat-omap/include/plat/iopgtable.h
index c3e93bb0911f..66a813977d52 100644
--- a/arch/arm/plat-omap/iopgtable.h
+++ b/arch/arm/plat-omap/include/plat/iopgtable.h
@@ -56,6 +56,19 @@
 
 #define IOPAGE_MASK		IOPTE_MASK
 
+/**
+ * omap_iommu_translate() - va to pa translation
+ * @d:		omap iommu descriptor
+ * @va:		virtual address
+ * @mask:	omap iommu descriptor mask
+ *
+ * va to pa translation
+ */
+static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask)
+{
+	return (d & mask) | (va & (~mask));
+}
+
 /*
  * some descriptor attributes.
  */
@@ -64,10 +77,15 @@
 #define IOPGD_SUPER		(1 << 18 | 2 << 0)
 
 #define iopgd_is_table(x)	(((x) & 3) == IOPGD_TABLE)
+#define iopgd_is_section(x)	(((x) & (1 << 18 | 3)) == IOPGD_SECTION)
+#define iopgd_is_super(x)	(((x) & (1 << 18 | 3)) == IOPGD_SUPER)
 
 #define IOPTE_SMALL		(2 << 0)
 #define IOPTE_LARGE		(1 << 0)
 
+#define iopte_is_small(x)	(((x) & 2) == IOPTE_SMALL)
+#define iopte_is_large(x)	(((x) & 3) == IOPTE_LARGE)
+
 /* to find an entry in a page-table-directory */
 #define iopgd_index(da)		(((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
 #define iopgd_offset(obj, da)	((obj)->iopgd + iopgd_index(da))
@@ -97,6 +115,6 @@ static inline u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa,
 }
 
 #define to_iommu(dev)							\
-	(struct iommu *)platform_get_drvdata(to_platform_device(dev))
+	(struct omap_iommu *)platform_get_drvdata(to_platform_device(dev))
 
 #endif /* __PLAT_OMAP_IOMMU_H */
diff --git a/arch/arm/plat-omap/include/plat/iovmm.h b/arch/arm/plat-omap/include/plat/iovmm.h
index e992b9655fbc..6af1a91c0f36 100644
--- a/arch/arm/plat-omap/include/plat/iovmm.h
+++ b/arch/arm/plat-omap/include/plat/iovmm.h
@@ -13,8 +13,10 @@
 #ifndef __IOMMU_MMAP_H
 #define __IOMMU_MMAP_H
 
+#include <linux/iommu.h>
+
 struct iovm_struct {
-	struct iommu		*iommu;	/* iommu object which this belongs to */
+	struct omap_iommu	*iommu;	/* iommu object which this belongs to */
 	u32			da_start; /* area definition */
 	u32			da_end;
 	u32			flags; /* IOVMF_: see below */
@@ -70,20 +72,18 @@ struct iovm_struct {
 #define IOVMF_DA_FIXED		(1 << (4 + IOVMF_SW_SHIFT))
 
 
-extern struct iovm_struct *find_iovm_area(struct iommu *obj, u32 da);
-extern u32 iommu_vmap(struct iommu *obj, u32 da,
+extern struct iovm_struct *omap_find_iovm_area(struct omap_iommu *obj, u32 da);
+extern u32
+omap_iommu_vmap(struct iommu_domain *domain, struct omap_iommu *obj, u32 da,
 			const struct sg_table *sgt, u32 flags);
-extern struct sg_table *iommu_vunmap(struct iommu *obj, u32 da);
-extern u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes,
-			   u32 flags);
-extern void iommu_vfree(struct iommu *obj, const u32 da);
-extern u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes,
-			u32 flags);
-extern void iommu_kunmap(struct iommu *obj, u32 da);
-extern u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes,
-			   u32 flags);
-extern void iommu_kfree(struct iommu *obj, u32 da);
-
-extern void *da_to_va(struct iommu *obj, u32 da);
+extern struct sg_table *omap_iommu_vunmap(struct iommu_domain *domain,
+				struct omap_iommu *obj, u32 da);
+extern u32
+omap_iommu_vmalloc(struct iommu_domain *domain, struct omap_iommu *obj,
+				u32 da, size_t bytes, u32 flags);
+extern void
+omap_iommu_vfree(struct iommu_domain *domain, struct omap_iommu *obj,
+				const u32 da);
+extern void *omap_da_to_va(struct omap_iommu *obj, u32 da);
 
 #endif /* __IOMMU_MMAP_H */
diff --git a/arch/arm/plat-omap/iommu-debug.c b/arch/arm/plat-omap/iommu-debug.c
deleted file mode 100644
index f07cf2f08e09..000000000000
--- a/arch/arm/plat-omap/iommu-debug.c
+++ /dev/null
@@ -1,418 +0,0 @@
-/*
- * omap iommu: debugfs interface
- *
- * Copyright (C) 2008-2009 Nokia Corporation
- *
- * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.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.
- */
-
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/platform_device.h>
-#include <linux/debugfs.h>
-
-#include <plat/iommu.h>
-#include <plat/iovmm.h>
-
-#include "iopgtable.h"
-
-#define MAXCOLUMN 100 /* for short messages */
-
-static DEFINE_MUTEX(iommu_debug_lock);
-
-static struct dentry *iommu_debug_root;
-
-static ssize_t debug_read_ver(struct file *file, char __user *userbuf,
-			      size_t count, loff_t *ppos)
-{
-	u32 ver = iommu_arch_version();
-	char buf[MAXCOLUMN], *p = buf;
-
-	p += sprintf(p, "H/W version: %d.%d\n", (ver >> 4) & 0xf , ver & 0xf);
-
-	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
-}
-
-static ssize_t debug_read_regs(struct file *file, char __user *userbuf,
-			       size_t count, loff_t *ppos)
-{
-	struct iommu *obj = file->private_data;
-	char *p, *buf;
-	ssize_t bytes;
-
-	buf = kmalloc(count, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-	p = buf;
-
-	mutex_lock(&iommu_debug_lock);
-
-	bytes = iommu_dump_ctx(obj, p, count);
-	bytes = simple_read_from_buffer(userbuf, count, ppos, buf, bytes);
-
-	mutex_unlock(&iommu_debug_lock);
-	kfree(buf);
-
-	return bytes;
-}
-
-static ssize_t debug_read_tlb(struct file *file, char __user *userbuf,
-			      size_t count, loff_t *ppos)
-{
-	struct iommu *obj = file->private_data;
-	char *p, *buf;
-	ssize_t bytes, rest;
-
-	buf = kmalloc(count, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-	p = buf;
-
-	mutex_lock(&iommu_debug_lock);
-
-	p += sprintf(p, "%8s %8s\n", "cam:", "ram:");
-	p += sprintf(p, "-----------------------------------------\n");
-	rest = count - (p - buf);
-	p += dump_tlb_entries(obj, p, rest);
-
-	bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
-
-	mutex_unlock(&iommu_debug_lock);
-	kfree(buf);
-
-	return bytes;
-}
-
-static ssize_t debug_write_pagetable(struct file *file,
-		     const char __user *userbuf, size_t count, loff_t *ppos)
-{
-	struct iotlb_entry e;
-	struct cr_regs cr;
-	int err;
-	struct iommu *obj = file->private_data;
-	char buf[MAXCOLUMN], *p = buf;
-
-	count = min(count, sizeof(buf));
-
-	mutex_lock(&iommu_debug_lock);
-	if (copy_from_user(p, userbuf, count)) {
-		mutex_unlock(&iommu_debug_lock);
-		return -EFAULT;
-	}
-
-	sscanf(p, "%x %x", &cr.cam, &cr.ram);
-	if (!cr.cam || !cr.ram) {
-		mutex_unlock(&iommu_debug_lock);
-		return -EINVAL;
-	}
-
-	iotlb_cr_to_e(&cr, &e);
-	err = iopgtable_store_entry(obj, &e);
-	if (err)
-		dev_err(obj->dev, "%s: fail to store cr\n", __func__);
-
-	mutex_unlock(&iommu_debug_lock);
-	return count;
-}
-
-#define dump_ioptable_entry_one(lv, da, val)			\
-	({							\
-		int __err = 0;					\
-		ssize_t bytes;					\
-		const int maxcol = 22;				\
-		const char *str = "%d: %08x %08x\n";		\
-		bytes = snprintf(p, maxcol, str, lv, da, val);	\
-		p += bytes;					\
-		len -= bytes;					\
-		if (len < maxcol)				\
-			__err = -ENOMEM;			\
-		__err;						\
-	})
-
-static ssize_t dump_ioptable(struct iommu *obj, char *buf, ssize_t len)
-{
-	int i;
-	u32 *iopgd;
-	char *p = buf;
-
-	spin_lock(&obj->page_table_lock);
-
-	iopgd = iopgd_offset(obj, 0);
-	for (i = 0; i < PTRS_PER_IOPGD; i++, iopgd++) {
-		int j, err;
-		u32 *iopte;
-		u32 da;
-
-		if (!*iopgd)
-			continue;
-
-		if (!(*iopgd & IOPGD_TABLE)) {
-			da = i << IOPGD_SHIFT;
-
-			err = dump_ioptable_entry_one(1, da, *iopgd);
-			if (err)
-				goto out;
-			continue;
-		}
-
-		iopte = iopte_offset(iopgd, 0);
-
-		for (j = 0; j < PTRS_PER_IOPTE; j++, iopte++) {
-			if (!*iopte)
-				continue;
-
-			da = (i << IOPGD_SHIFT) + (j << IOPTE_SHIFT);
-			err = dump_ioptable_entry_one(2, da, *iopgd);
-			if (err)
-				goto out;
-		}
-	}
-out:
-	spin_unlock(&obj->page_table_lock);
-
-	return p - buf;
-}
-
-static ssize_t debug_read_pagetable(struct file *file, char __user *userbuf,
-				    size_t count, loff_t *ppos)
-{
-	struct iommu *obj = file->private_data;
-	char *p, *buf;
-	size_t bytes;
-
-	buf = (char *)__get_free_page(GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-	p = buf;
-
-	p += sprintf(p, "L: %8s %8s\n", "da:", "pa:");
-	p += sprintf(p, "-----------------------------------------\n");
-
-	mutex_lock(&iommu_debug_lock);
-
-	bytes = PAGE_SIZE - (p - buf);
-	p += dump_ioptable(obj, p, bytes);
-
-	bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
-
-	mutex_unlock(&iommu_debug_lock);
-	free_page((unsigned long)buf);
-
-	return bytes;
-}
-
-static ssize_t debug_read_mmap(struct file *file, char __user *userbuf,
-			       size_t count, loff_t *ppos)
-{
-	struct iommu *obj = file->private_data;
-	char *p, *buf;
-	struct iovm_struct *tmp;
-	int uninitialized_var(i);
-	ssize_t bytes;
-
-	buf = (char *)__get_free_page(GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-	p = buf;
-
-	p += sprintf(p, "%-3s %-8s %-8s %6s %8s\n",
-		     "No", "start", "end", "size", "flags");
-	p += sprintf(p, "-------------------------------------------------\n");
-
-	mutex_lock(&iommu_debug_lock);
-
-	list_for_each_entry(tmp, &obj->mmap, list) {
-		size_t len;
-		const char *str = "%3d %08x-%08x %6x %8x\n";
-		const int maxcol = 39;
-
-		len = tmp->da_end - tmp->da_start;
-		p += snprintf(p, maxcol, str,
-			      i, tmp->da_start, tmp->da_end, len, tmp->flags);
-
-		if (PAGE_SIZE - (p - buf) < maxcol)
-			break;
-		i++;
-	}
-
-	bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
-
-	mutex_unlock(&iommu_debug_lock);
-	free_page((unsigned long)buf);
-
-	return bytes;
-}
-
-static ssize_t debug_read_mem(struct file *file, char __user *userbuf,
-			      size_t count, loff_t *ppos)
-{
-	struct iommu *obj = file->private_data;
-	char *p, *buf;
-	struct iovm_struct *area;
-	ssize_t bytes;
-
-	count = min_t(ssize_t, count, PAGE_SIZE);
-
-	buf = (char *)__get_free_page(GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-	p = buf;
-
-	mutex_lock(&iommu_debug_lock);
-
-	area = find_iovm_area(obj, (u32)ppos);
-	if (IS_ERR(area)) {
-		bytes = -EINVAL;
-		goto err_out;
-	}
-	memcpy(p, area->va, count);
-	p += count;
-
-	bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
-err_out:
-	mutex_unlock(&iommu_debug_lock);
-	free_page((unsigned long)buf);
-
-	return bytes;
-}
-
-static ssize_t debug_write_mem(struct file *file, const char __user *userbuf,
-			       size_t count, loff_t *ppos)
-{
-	struct iommu *obj = file->private_data;
-	struct iovm_struct *area;
-	char *p, *buf;
-
-	count = min_t(size_t, count, PAGE_SIZE);
-
-	buf = (char *)__get_free_page(GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-	p = buf;
-
-	mutex_lock(&iommu_debug_lock);
-
-	if (copy_from_user(p, userbuf, count)) {
-		count =  -EFAULT;
-		goto err_out;
-	}
-
-	area = find_iovm_area(obj, (u32)ppos);
-	if (IS_ERR(area)) {
-		count = -EINVAL;
-		goto err_out;
-	}
-	memcpy(area->va, p, count);
-err_out:
-	mutex_unlock(&iommu_debug_lock);
-	free_page((unsigned long)buf);
-
-	return count;
-}
-
-static int debug_open_generic(struct inode *inode, struct file *file)
-{
-	file->private_data = inode->i_private;
-	return 0;
-}
-
-#define DEBUG_FOPS(name)						\
-	static const struct file_operations debug_##name##_fops = {	\
-		.open = debug_open_generic,				\
-		.read = debug_read_##name,				\
-		.write = debug_write_##name,				\
-		.llseek = generic_file_llseek,				\
-	};
-
-#define DEBUG_FOPS_RO(name)						\
-	static const struct file_operations debug_##name##_fops = {	\
-		.open = debug_open_generic,				\
-		.read = debug_read_##name,				\
-		.llseek = generic_file_llseek,				\
-	};
-
-DEBUG_FOPS_RO(ver);
-DEBUG_FOPS_RO(regs);
-DEBUG_FOPS_RO(tlb);
-DEBUG_FOPS(pagetable);
-DEBUG_FOPS_RO(mmap);
-DEBUG_FOPS(mem);
-
-#define __DEBUG_ADD_FILE(attr, mode)					\
-	{								\
-		struct dentry *dent;					\
-		dent = debugfs_create_file(#attr, mode, parent,		\
-					   obj, &debug_##attr##_fops);	\
-		if (!dent)						\
-			return -ENOMEM;					\
-	}
-
-#define DEBUG_ADD_FILE(name) __DEBUG_ADD_FILE(name, 600)
-#define DEBUG_ADD_FILE_RO(name) __DEBUG_ADD_FILE(name, 400)
-
-static int iommu_debug_register(struct device *dev, void *data)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct iommu *obj = platform_get_drvdata(pdev);
-	struct dentry *d, *parent;
-
-	if (!obj || !obj->dev)
-		return -EINVAL;
-
-	d = debugfs_create_dir(obj->name, iommu_debug_root);
-	if (!d)
-		return -ENOMEM;
-	parent = d;
-
-	d = debugfs_create_u8("nr_tlb_entries", 400, parent,
-			      (u8 *)&obj->nr_tlb_entries);
-	if (!d)
-		return -ENOMEM;
-
-	DEBUG_ADD_FILE_RO(ver);
-	DEBUG_ADD_FILE_RO(regs);
-	DEBUG_ADD_FILE_RO(tlb);
-	DEBUG_ADD_FILE(pagetable);
-	DEBUG_ADD_FILE_RO(mmap);
-	DEBUG_ADD_FILE(mem);
-
-	return 0;
-}
-
-static int __init iommu_debug_init(void)
-{
-	struct dentry *d;
-	int err;
-
-	d = debugfs_create_dir("iommu", NULL);
-	if (!d)
-		return -ENOMEM;
-	iommu_debug_root = d;
-
-	err = foreach_iommu_device(d, iommu_debug_register);
-	if (err)
-		goto err_out;
-	return 0;
-
-err_out:
-	debugfs_remove_recursive(iommu_debug_root);
-	return err;
-}
-module_init(iommu_debug_init)
-
-static void __exit iommu_debugfs_exit(void)
-{
-	debugfs_remove_recursive(iommu_debug_root);
-}
-module_exit(iommu_debugfs_exit)
-
-MODULE_DESCRIPTION("omap iommu: debugfs interface");
-MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@nokia.com>");
-MODULE_LICENSE("GPL v2");
diff --git a/arch/arm/plat-omap/iommu.c b/arch/arm/plat-omap/iommu.c
deleted file mode 100644
index 34fc31ee9081..000000000000
--- a/arch/arm/plat-omap/iommu.c
+++ /dev/null
@@ -1,1102 +0,0 @@
-/*
- * omap iommu: tlb and pagetable primitives
- *
- * Copyright (C) 2008-2010 Nokia Corporation
- *
- * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>,
- *		Paul Mundt and Toshihiro Kobayashi
- *
- * 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.
- */
-
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-
-#include <asm/cacheflush.h>
-
-#include <plat/iommu.h>
-
-#include "iopgtable.h"
-
-#define for_each_iotlb_cr(obj, n, __i, cr)				\
-	for (__i = 0;							\
-	     (__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true);	\
-	     __i++)
-
-/* accommodate the difference between omap1 and omap2/3 */
-static const struct iommu_functions *arch_iommu;
-
-static struct platform_driver omap_iommu_driver;
-static struct kmem_cache *iopte_cachep;
-
-/**
- * install_iommu_arch - Install archtecure specific iommu functions
- * @ops:	a pointer to architecture specific iommu functions
- *
- * There are several kind of iommu algorithm(tlb, pagetable) among
- * omap series. This interface installs such an iommu algorighm.
- **/
-int install_iommu_arch(const struct iommu_functions *ops)
-{
-	if (arch_iommu)
-		return -EBUSY;
-
-	arch_iommu = ops;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(install_iommu_arch);
-
-/**
- * uninstall_iommu_arch - Uninstall archtecure specific iommu functions
- * @ops:	a pointer to architecture specific iommu functions
- *
- * This interface uninstalls the iommu algorighm installed previously.
- **/
-void uninstall_iommu_arch(const struct iommu_functions *ops)
-{
-	if (arch_iommu != ops)
-		pr_err("%s: not your arch\n", __func__);
-
-	arch_iommu = NULL;
-}
-EXPORT_SYMBOL_GPL(uninstall_iommu_arch);
-
-/**
- * iommu_save_ctx - Save registers for pm off-mode support
- * @obj:	target iommu
- **/
-void iommu_save_ctx(struct iommu *obj)
-{
-	arch_iommu->save_ctx(obj);
-}
-EXPORT_SYMBOL_GPL(iommu_save_ctx);
-
-/**
- * iommu_restore_ctx - Restore registers for pm off-mode support
- * @obj:	target iommu
- **/
-void iommu_restore_ctx(struct iommu *obj)
-{
-	arch_iommu->restore_ctx(obj);
-}
-EXPORT_SYMBOL_GPL(iommu_restore_ctx);
-
-/**
- * iommu_arch_version - Return running iommu arch version
- **/
-u32 iommu_arch_version(void)
-{
-	return arch_iommu->version;
-}
-EXPORT_SYMBOL_GPL(iommu_arch_version);
-
-static int iommu_enable(struct iommu *obj)
-{
-	int err;
-
-	if (!obj)
-		return -EINVAL;
-
-	if (!arch_iommu)
-		return -ENODEV;
-
-	clk_enable(obj->clk);
-
-	err = arch_iommu->enable(obj);
-
-	clk_disable(obj->clk);
-	return err;
-}
-
-static void iommu_disable(struct iommu *obj)
-{
-	if (!obj)
-		return;
-
-	clk_enable(obj->clk);
-
-	arch_iommu->disable(obj);
-
-	clk_disable(obj->clk);
-}
-
-/*
- *	TLB operations
- */
-void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e)
-{
-	BUG_ON(!cr || !e);
-
-	arch_iommu->cr_to_e(cr, e);
-}
-EXPORT_SYMBOL_GPL(iotlb_cr_to_e);
-
-static inline int iotlb_cr_valid(struct cr_regs *cr)
-{
-	if (!cr)
-		return -EINVAL;
-
-	return arch_iommu->cr_valid(cr);
-}
-
-static inline struct cr_regs *iotlb_alloc_cr(struct iommu *obj,
-					     struct iotlb_entry *e)
-{
-	if (!e)
-		return NULL;
-
-	return arch_iommu->alloc_cr(obj, e);
-}
-
-u32 iotlb_cr_to_virt(struct cr_regs *cr)
-{
-	return arch_iommu->cr_to_virt(cr);
-}
-EXPORT_SYMBOL_GPL(iotlb_cr_to_virt);
-
-static u32 get_iopte_attr(struct iotlb_entry *e)
-{
-	return arch_iommu->get_pte_attr(e);
-}
-
-static u32 iommu_report_fault(struct iommu *obj, u32 *da)
-{
-	return arch_iommu->fault_isr(obj, da);
-}
-
-static void iotlb_lock_get(struct iommu *obj, struct iotlb_lock *l)
-{
-	u32 val;
-
-	val = iommu_read_reg(obj, MMU_LOCK);
-
-	l->base = MMU_LOCK_BASE(val);
-	l->vict = MMU_LOCK_VICT(val);
-
-}
-
-static void iotlb_lock_set(struct iommu *obj, struct iotlb_lock *l)
-{
-	u32 val;
-
-	val = (l->base << MMU_LOCK_BASE_SHIFT);
-	val |= (l->vict << MMU_LOCK_VICT_SHIFT);
-
-	iommu_write_reg(obj, val, MMU_LOCK);
-}
-
-static void iotlb_read_cr(struct iommu *obj, struct cr_regs *cr)
-{
-	arch_iommu->tlb_read_cr(obj, cr);
-}
-
-static void iotlb_load_cr(struct iommu *obj, struct cr_regs *cr)
-{
-	arch_iommu->tlb_load_cr(obj, cr);
-
-	iommu_write_reg(obj, 1, MMU_FLUSH_ENTRY);
-	iommu_write_reg(obj, 1, MMU_LD_TLB);
-}
-
-/**
- * iotlb_dump_cr - Dump an iommu tlb entry into buf
- * @obj:	target iommu
- * @cr:		contents of cam and ram register
- * @buf:	output buffer
- **/
-static inline ssize_t iotlb_dump_cr(struct iommu *obj, struct cr_regs *cr,
-				    char *buf)
-{
-	BUG_ON(!cr || !buf);
-
-	return arch_iommu->dump_cr(obj, cr, buf);
-}
-
-/* only used in iotlb iteration for-loop */
-static struct cr_regs __iotlb_read_cr(struct iommu *obj, int n)
-{
-	struct cr_regs cr;
-	struct iotlb_lock l;
-
-	iotlb_lock_get(obj, &l);
-	l.vict = n;
-	iotlb_lock_set(obj, &l);
-	iotlb_read_cr(obj, &cr);
-
-	return cr;
-}
-
-/**
- * load_iotlb_entry - Set an iommu tlb entry
- * @obj:	target iommu
- * @e:		an iommu tlb entry info
- **/
-int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e)
-{
-	int err = 0;
-	struct iotlb_lock l;
-	struct cr_regs *cr;
-
-	if (!obj || !obj->nr_tlb_entries || !e)
-		return -EINVAL;
-
-	clk_enable(obj->clk);
-
-	iotlb_lock_get(obj, &l);
-	if (l.base == obj->nr_tlb_entries) {
-		dev_warn(obj->dev, "%s: preserve entries full\n", __func__);
-		err = -EBUSY;
-		goto out;
-	}
-	if (!e->prsvd) {
-		int i;
-		struct cr_regs tmp;
-
-		for_each_iotlb_cr(obj, obj->nr_tlb_entries, i, tmp)
-			if (!iotlb_cr_valid(&tmp))
-				break;
-
-		if (i == obj->nr_tlb_entries) {
-			dev_dbg(obj->dev, "%s: full: no entry\n", __func__);
-			err = -EBUSY;
-			goto out;
-		}
-
-		iotlb_lock_get(obj, &l);
-	} else {
-		l.vict = l.base;
-		iotlb_lock_set(obj, &l);
-	}
-
-	cr = iotlb_alloc_cr(obj, e);
-	if (IS_ERR(cr)) {
-		clk_disable(obj->clk);
-		return PTR_ERR(cr);
-	}
-
-	iotlb_load_cr(obj, cr);
-	kfree(cr);
-
-	if (e->prsvd)
-		l.base++;
-	/* increment victim for next tlb load */
-	if (++l.vict == obj->nr_tlb_entries)
-		l.vict = l.base;
-	iotlb_lock_set(obj, &l);
-out:
-	clk_disable(obj->clk);
-	return err;
-}
-EXPORT_SYMBOL_GPL(load_iotlb_entry);
-
-/**
- * flush_iotlb_page - Clear an iommu tlb entry
- * @obj:	target iommu
- * @da:		iommu device virtual address
- *
- * Clear an iommu tlb entry which includes 'da' address.
- **/
-void flush_iotlb_page(struct iommu *obj, u32 da)
-{
-	int i;
-	struct cr_regs cr;
-
-	clk_enable(obj->clk);
-
-	for_each_iotlb_cr(obj, obj->nr_tlb_entries, i, cr) {
-		u32 start;
-		size_t bytes;
-
-		if (!iotlb_cr_valid(&cr))
-			continue;
-
-		start = iotlb_cr_to_virt(&cr);
-		bytes = iopgsz_to_bytes(cr.cam & 3);
-
-		if ((start <= da) && (da < start + bytes)) {
-			dev_dbg(obj->dev, "%s: %08x<=%08x(%x)\n",
-				__func__, start, da, bytes);
-			iotlb_load_cr(obj, &cr);
-			iommu_write_reg(obj, 1, MMU_FLUSH_ENTRY);
-		}
-	}
-	clk_disable(obj->clk);
-
-	if (i == obj->nr_tlb_entries)
-		dev_dbg(obj->dev, "%s: no page for %08x\n", __func__, da);
-}
-EXPORT_SYMBOL_GPL(flush_iotlb_page);
-
-/**
- * flush_iotlb_range - Clear an iommu tlb entries
- * @obj:	target iommu
- * @start:	iommu device virtual address(start)
- * @end:	iommu device virtual address(end)
- *
- * Clear an iommu tlb entry which includes 'da' address.
- **/
-void flush_iotlb_range(struct iommu *obj, u32 start, u32 end)
-{
-	u32 da = start;
-
-	while (da < end) {
-		flush_iotlb_page(obj, da);
-		/* FIXME: Optimize for multiple page size */
-		da += IOPTE_SIZE;
-	}
-}
-EXPORT_SYMBOL_GPL(flush_iotlb_range);
-
-/**
- * flush_iotlb_all - Clear all iommu tlb entries
- * @obj:	target iommu
- **/
-void flush_iotlb_all(struct iommu *obj)
-{
-	struct iotlb_lock l;
-
-	clk_enable(obj->clk);
-
-	l.base = 0;
-	l.vict = 0;
-	iotlb_lock_set(obj, &l);
-
-	iommu_write_reg(obj, 1, MMU_GFLUSH);
-
-	clk_disable(obj->clk);
-}
-EXPORT_SYMBOL_GPL(flush_iotlb_all);
-
-/**
- * iommu_set_twl - enable/disable table walking logic
- * @obj:	target iommu
- * @on:		enable/disable
- *
- * Function used to enable/disable TWL. If one wants to work
- * exclusively with locked TLB entries and receive notifications
- * for TLB miss then call this function to disable TWL.
- */
-void iommu_set_twl(struct iommu *obj, bool on)
-{
-	clk_enable(obj->clk);
-	arch_iommu->set_twl(obj, on);
-	clk_disable(obj->clk);
-}
-EXPORT_SYMBOL_GPL(iommu_set_twl);
-
-#if defined(CONFIG_OMAP_IOMMU_DEBUG_MODULE)
-
-ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t bytes)
-{
-	if (!obj || !buf)
-		return -EINVAL;
-
-	clk_enable(obj->clk);
-
-	bytes = arch_iommu->dump_ctx(obj, buf, bytes);
-
-	clk_disable(obj->clk);
-
-	return bytes;
-}
-EXPORT_SYMBOL_GPL(iommu_dump_ctx);
-
-static int __dump_tlb_entries(struct iommu *obj, struct cr_regs *crs, int num)
-{
-	int i;
-	struct iotlb_lock saved;
-	struct cr_regs tmp;
-	struct cr_regs *p = crs;
-
-	clk_enable(obj->clk);
-	iotlb_lock_get(obj, &saved);
-
-	for_each_iotlb_cr(obj, num, i, tmp) {
-		if (!iotlb_cr_valid(&tmp))
-			continue;
-		*p++ = tmp;
-	}
-
-	iotlb_lock_set(obj, &saved);
-	clk_disable(obj->clk);
-
-	return  p - crs;
-}
-
-/**
- * dump_tlb_entries - dump cr arrays to given buffer
- * @obj:	target iommu
- * @buf:	output buffer
- **/
-size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t bytes)
-{
-	int i, num;
-	struct cr_regs *cr;
-	char *p = buf;
-
-	num = bytes / sizeof(*cr);
-	num = min(obj->nr_tlb_entries, num);
-
-	cr = kcalloc(num, sizeof(*cr), GFP_KERNEL);
-	if (!cr)
-		return 0;
-
-	num = __dump_tlb_entries(obj, cr, num);
-	for (i = 0; i < num; i++)
-		p += iotlb_dump_cr(obj, cr + i, p);
-	kfree(cr);
-
-	return p - buf;
-}
-EXPORT_SYMBOL_GPL(dump_tlb_entries);
-
-int foreach_iommu_device(void *data, int (*fn)(struct device *, void *))
-{
-	return driver_for_each_device(&omap_iommu_driver.driver,
-				      NULL, data, fn);
-}
-EXPORT_SYMBOL_GPL(foreach_iommu_device);
-
-#endif /* CONFIG_OMAP_IOMMU_DEBUG_MODULE */
-
-/*
- *	H/W pagetable operations
- */
-static void flush_iopgd_range(u32 *first, u32 *last)
-{
-	/* FIXME: L2 cache should be taken care of if it exists */
-	do {
-		asm("mcr	p15, 0, %0, c7, c10, 1 @ flush_pgd"
-		    : : "r" (first));
-		first += L1_CACHE_BYTES / sizeof(*first);
-	} while (first <= last);
-}
-
-static void flush_iopte_range(u32 *first, u32 *last)
-{
-	/* FIXME: L2 cache should be taken care of if it exists */
-	do {
-		asm("mcr	p15, 0, %0, c7, c10, 1 @ flush_pte"
-		    : : "r" (first));
-		first += L1_CACHE_BYTES / sizeof(*first);
-	} while (first <= last);
-}
-
-static void iopte_free(u32 *iopte)
-{
-	/* Note: freed iopte's must be clean ready for re-use */
-	kmem_cache_free(iopte_cachep, iopte);
-}
-
-static u32 *iopte_alloc(struct iommu *obj, u32 *iopgd, u32 da)
-{
-	u32 *iopte;
-
-	/* a table has already existed */
-	if (*iopgd)
-		goto pte_ready;
-
-	/*
-	 * do the allocation outside the page table lock
-	 */
-	spin_unlock(&obj->page_table_lock);
-	iopte = kmem_cache_zalloc(iopte_cachep, GFP_KERNEL);
-	spin_lock(&obj->page_table_lock);
-
-	if (!*iopgd) {
-		if (!iopte)
-			return ERR_PTR(-ENOMEM);
-
-		*iopgd = virt_to_phys(iopte) | IOPGD_TABLE;
-		flush_iopgd_range(iopgd, iopgd);
-
-		dev_vdbg(obj->dev, "%s: a new pte:%p\n", __func__, iopte);
-	} else {
-		/* We raced, free the reduniovant table */
-		iopte_free(iopte);
-	}
-
-pte_ready:
-	iopte = iopte_offset(iopgd, da);
-
-	dev_vdbg(obj->dev,
-		 "%s: da:%08x pgd:%p *pgd:%08x pte:%p *pte:%08x\n",
-		 __func__, da, iopgd, *iopgd, iopte, *iopte);
-
-	return iopte;
-}
-
-static int iopgd_alloc_section(struct iommu *obj, u32 da, u32 pa, u32 prot)
-{
-	u32 *iopgd = iopgd_offset(obj, da);
-
-	if ((da | pa) & ~IOSECTION_MASK) {
-		dev_err(obj->dev, "%s: %08x:%08x should aligned on %08lx\n",
-			__func__, da, pa, IOSECTION_SIZE);
-		return -EINVAL;
-	}
-
-	*iopgd = (pa & IOSECTION_MASK) | prot | IOPGD_SECTION;
-	flush_iopgd_range(iopgd, iopgd);
-	return 0;
-}
-
-static int iopgd_alloc_super(struct iommu *obj, u32 da, u32 pa, u32 prot)
-{
-	u32 *iopgd = iopgd_offset(obj, da);
-	int i;
-
-	if ((da | pa) & ~IOSUPER_MASK) {
-		dev_err(obj->dev, "%s: %08x:%08x should aligned on %08lx\n",
-			__func__, da, pa, IOSUPER_SIZE);
-		return -EINVAL;
-	}
-
-	for (i = 0; i < 16; i++)
-		*(iopgd + i) = (pa & IOSUPER_MASK) | prot | IOPGD_SUPER;
-	flush_iopgd_range(iopgd, iopgd + 15);
-	return 0;
-}
-
-static int iopte_alloc_page(struct iommu *obj, u32 da, u32 pa, u32 prot)
-{
-	u32 *iopgd = iopgd_offset(obj, da);
-	u32 *iopte = iopte_alloc(obj, iopgd, da);
-
-	if (IS_ERR(iopte))
-		return PTR_ERR(iopte);
-
-	*iopte = (pa & IOPAGE_MASK) | prot | IOPTE_SMALL;
-	flush_iopte_range(iopte, iopte);
-
-	dev_vdbg(obj->dev, "%s: da:%08x pa:%08x pte:%p *pte:%08x\n",
-		 __func__, da, pa, iopte, *iopte);
-
-	return 0;
-}
-
-static int iopte_alloc_large(struct iommu *obj, u32 da, u32 pa, u32 prot)
-{
-	u32 *iopgd = iopgd_offset(obj, da);
-	u32 *iopte = iopte_alloc(obj, iopgd, da);
-	int i;
-
-	if ((da | pa) & ~IOLARGE_MASK) {
-		dev_err(obj->dev, "%s: %08x:%08x should aligned on %08lx\n",
-			__func__, da, pa, IOLARGE_SIZE);
-		return -EINVAL;
-	}
-
-	if (IS_ERR(iopte))
-		return PTR_ERR(iopte);
-
-	for (i = 0; i < 16; i++)
-		*(iopte + i) = (pa & IOLARGE_MASK) | prot | IOPTE_LARGE;
-	flush_iopte_range(iopte, iopte + 15);
-	return 0;
-}
-
-static int iopgtable_store_entry_core(struct iommu *obj, struct iotlb_entry *e)
-{
-	int (*fn)(struct iommu *, u32, u32, u32);
-	u32 prot;
-	int err;
-
-	if (!obj || !e)
-		return -EINVAL;
-
-	switch (e->pgsz) {
-	case MMU_CAM_PGSZ_16M:
-		fn = iopgd_alloc_super;
-		break;
-	case MMU_CAM_PGSZ_1M:
-		fn = iopgd_alloc_section;
-		break;
-	case MMU_CAM_PGSZ_64K:
-		fn = iopte_alloc_large;
-		break;
-	case MMU_CAM_PGSZ_4K:
-		fn = iopte_alloc_page;
-		break;
-	default:
-		fn = NULL;
-		BUG();
-		break;
-	}
-
-	prot = get_iopte_attr(e);
-
-	spin_lock(&obj->page_table_lock);
-	err = fn(obj, e->da, e->pa, prot);
-	spin_unlock(&obj->page_table_lock);
-
-	return err;
-}
-
-/**
- * iopgtable_store_entry - Make an iommu pte entry
- * @obj:	target iommu
- * @e:		an iommu tlb entry info
- **/
-int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e)
-{
-	int err;
-
-	flush_iotlb_page(obj, e->da);
-	err = iopgtable_store_entry_core(obj, e);
-#ifdef PREFETCH_IOTLB
-	if (!err)
-		load_iotlb_entry(obj, e);
-#endif
-	return err;
-}
-EXPORT_SYMBOL_GPL(iopgtable_store_entry);
-
-/**
- * iopgtable_lookup_entry - Lookup an iommu pte entry
- * @obj:	target iommu
- * @da:		iommu device virtual address
- * @ppgd:	iommu pgd entry pointer to be returned
- * @ppte:	iommu pte entry pointer to be returned
- **/
-void iopgtable_lookup_entry(struct iommu *obj, u32 da, u32 **ppgd, u32 **ppte)
-{
-	u32 *iopgd, *iopte = NULL;
-
-	iopgd = iopgd_offset(obj, da);
-	if (!*iopgd)
-		goto out;
-
-	if (iopgd_is_table(*iopgd))
-		iopte = iopte_offset(iopgd, da);
-out:
-	*ppgd = iopgd;
-	*ppte = iopte;
-}
-EXPORT_SYMBOL_GPL(iopgtable_lookup_entry);
-
-static size_t iopgtable_clear_entry_core(struct iommu *obj, u32 da)
-{
-	size_t bytes;
-	u32 *iopgd = iopgd_offset(obj, da);
-	int nent = 1;
-
-	if (!*iopgd)
-		return 0;
-
-	if (iopgd_is_table(*iopgd)) {
-		int i;
-		u32 *iopte = iopte_offset(iopgd, da);
-
-		bytes = IOPTE_SIZE;
-		if (*iopte & IOPTE_LARGE) {
-			nent *= 16;
-			/* rewind to the 1st entry */
-			iopte = iopte_offset(iopgd, (da & IOLARGE_MASK));
-		}
-		bytes *= nent;
-		memset(iopte, 0, nent * sizeof(*iopte));
-		flush_iopte_range(iopte, iopte + (nent - 1) * sizeof(*iopte));
-
-		/*
-		 * do table walk to check if this table is necessary or not
-		 */
-		iopte = iopte_offset(iopgd, 0);
-		for (i = 0; i < PTRS_PER_IOPTE; i++)
-			if (iopte[i])
-				goto out;
-
-		iopte_free(iopte);
-		nent = 1; /* for the next L1 entry */
-	} else {
-		bytes = IOPGD_SIZE;
-		if ((*iopgd & IOPGD_SUPER) == IOPGD_SUPER) {
-			nent *= 16;
-			/* rewind to the 1st entry */
-			iopgd = iopgd_offset(obj, (da & IOSUPER_MASK));
-		}
-		bytes *= nent;
-	}
-	memset(iopgd, 0, nent * sizeof(*iopgd));
-	flush_iopgd_range(iopgd, iopgd + (nent - 1) * sizeof(*iopgd));
-out:
-	return bytes;
-}
-
-/**
- * iopgtable_clear_entry - Remove an iommu pte entry
- * @obj:	target iommu
- * @da:		iommu device virtual address
- **/
-size_t iopgtable_clear_entry(struct iommu *obj, u32 da)
-{
-	size_t bytes;
-
-	spin_lock(&obj->page_table_lock);
-
-	bytes = iopgtable_clear_entry_core(obj, da);
-	flush_iotlb_page(obj, da);
-
-	spin_unlock(&obj->page_table_lock);
-
-	return bytes;
-}
-EXPORT_SYMBOL_GPL(iopgtable_clear_entry);
-
-static void iopgtable_clear_entry_all(struct iommu *obj)
-{
-	int i;
-
-	spin_lock(&obj->page_table_lock);
-
-	for (i = 0; i < PTRS_PER_IOPGD; i++) {
-		u32 da;
-		u32 *iopgd;
-
-		da = i << IOPGD_SHIFT;
-		iopgd = iopgd_offset(obj, da);
-
-		if (!*iopgd)
-			continue;
-
-		if (iopgd_is_table(*iopgd))
-			iopte_free(iopte_offset(iopgd, 0));
-
-		*iopgd = 0;
-		flush_iopgd_range(iopgd, iopgd);
-	}
-
-	flush_iotlb_all(obj);
-
-	spin_unlock(&obj->page_table_lock);
-}
-
-/*
- *	Device IOMMU generic operations
- */
-static irqreturn_t iommu_fault_handler(int irq, void *data)
-{
-	u32 da, errs;
-	u32 *iopgd, *iopte;
-	struct iommu *obj = data;
-
-	if (!obj->refcount)
-		return IRQ_NONE;
-
-	clk_enable(obj->clk);
-	errs = iommu_report_fault(obj, &da);
-	clk_disable(obj->clk);
-	if (errs == 0)
-		return IRQ_HANDLED;
-
-	/* Fault callback or TLB/PTE Dynamic loading */
-	if (obj->isr && !obj->isr(obj, da, errs, obj->isr_priv))
-		return IRQ_HANDLED;
-
-	iommu_disable(obj);
-
-	iopgd = iopgd_offset(obj, da);
-
-	if (!iopgd_is_table(*iopgd)) {
-		dev_err(obj->dev, "%s: errs:0x%08x da:0x%08x pgd:0x%p "
-			"*pgd:px%08x\n", obj->name, errs, da, iopgd, *iopgd);
-		return IRQ_NONE;
-	}
-
-	iopte = iopte_offset(iopgd, da);
-
-	dev_err(obj->dev, "%s: errs:0x%08x da:0x%08x pgd:0x%p *pgd:0x%08x "
-		"pte:0x%p *pte:0x%08x\n", obj->name, errs, da, iopgd, *iopgd,
-		iopte, *iopte);
-
-	return IRQ_NONE;
-}
-
-static int device_match_by_alias(struct device *dev, void *data)
-{
-	struct iommu *obj = to_iommu(dev);
-	const char *name = data;
-
-	pr_debug("%s: %s %s\n", __func__, obj->name, name);
-
-	return strcmp(obj->name, name) == 0;
-}
-
-/**
- * iommu_set_da_range - Set a valid device address range
- * @obj:		target iommu
- * @start		Start of valid range
- * @end			End of valid range
- **/
-int iommu_set_da_range(struct iommu *obj, u32 start, u32 end)
-{
-
-	if (!obj)
-		return -EFAULT;
-
-	if (end < start || !PAGE_ALIGN(start | end))
-		return -EINVAL;
-
-	obj->da_start = start;
-	obj->da_end = end;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(iommu_set_da_range);
-
-/**
- * iommu_get - Get iommu handler
- * @name:	target iommu name
- **/
-struct iommu *iommu_get(const char *name)
-{
-	int err = -ENOMEM;
-	struct device *dev;
-	struct iommu *obj;
-
-	dev = driver_find_device(&omap_iommu_driver.driver, NULL, (void *)name,
-				 device_match_by_alias);
-	if (!dev)
-		return ERR_PTR(-ENODEV);
-
-	obj = to_iommu(dev);
-
-	mutex_lock(&obj->iommu_lock);
-
-	if (obj->refcount++ == 0) {
-		err = iommu_enable(obj);
-		if (err)
-			goto err_enable;
-		flush_iotlb_all(obj);
-	}
-
-	if (!try_module_get(obj->owner))
-		goto err_module;
-
-	mutex_unlock(&obj->iommu_lock);
-
-	dev_dbg(obj->dev, "%s: %s\n", __func__, obj->name);
-	return obj;
-
-err_module:
-	if (obj->refcount == 1)
-		iommu_disable(obj);
-err_enable:
-	obj->refcount--;
-	mutex_unlock(&obj->iommu_lock);
-	return ERR_PTR(err);
-}
-EXPORT_SYMBOL_GPL(iommu_get);
-
-/**
- * iommu_put - Put back iommu handler
- * @obj:	target iommu
- **/
-void iommu_put(struct iommu *obj)
-{
-	if (!obj || IS_ERR(obj))
-		return;
-
-	mutex_lock(&obj->iommu_lock);
-
-	if (--obj->refcount == 0)
-		iommu_disable(obj);
-
-	module_put(obj->owner);
-
-	mutex_unlock(&obj->iommu_lock);
-
-	dev_dbg(obj->dev, "%s: %s\n", __func__, obj->name);
-}
-EXPORT_SYMBOL_GPL(iommu_put);
-
-int iommu_set_isr(const char *name,
-		  int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs,
-			     void *priv),
-		  void *isr_priv)
-{
-	struct device *dev;
-	struct iommu *obj;
-
-	dev = driver_find_device(&omap_iommu_driver.driver, NULL, (void *)name,
-				 device_match_by_alias);
-	if (!dev)
-		return -ENODEV;
-
-	obj = to_iommu(dev);
-	mutex_lock(&obj->iommu_lock);
-	if (obj->refcount != 0) {
-		mutex_unlock(&obj->iommu_lock);
-		return -EBUSY;
-	}
-	obj->isr = isr;
-	obj->isr_priv = isr_priv;
-	mutex_unlock(&obj->iommu_lock);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(iommu_set_isr);
-
-/*
- *	OMAP Device MMU(IOMMU) detection
- */
-static int __devinit omap_iommu_probe(struct platform_device *pdev)
-{
-	int err = -ENODEV;
-	void *p;
-	int irq;
-	struct iommu *obj;
-	struct resource *res;
-	struct iommu_platform_data *pdata = pdev->dev.platform_data;
-
-	if (pdev->num_resources != 2)
-		return -EINVAL;
-
-	obj = kzalloc(sizeof(*obj) + MMU_REG_SIZE, GFP_KERNEL);
-	if (!obj)
-		return -ENOMEM;
-
-	obj->clk = clk_get(&pdev->dev, pdata->clk_name);
-	if (IS_ERR(obj->clk))
-		goto err_clk;
-
-	obj->nr_tlb_entries = pdata->nr_tlb_entries;
-	obj->name = pdata->name;
-	obj->dev = &pdev->dev;
-	obj->ctx = (void *)obj + sizeof(*obj);
-	obj->da_start = pdata->da_start;
-	obj->da_end = pdata->da_end;
-
-	mutex_init(&obj->iommu_lock);
-	mutex_init(&obj->mmap_lock);
-	spin_lock_init(&obj->page_table_lock);
-	INIT_LIST_HEAD(&obj->mmap);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		err = -ENODEV;
-		goto err_mem;
-	}
-
-	res = request_mem_region(res->start, resource_size(res),
-				 dev_name(&pdev->dev));
-	if (!res) {
-		err = -EIO;
-		goto err_mem;
-	}
-
-	obj->regbase = ioremap(res->start, resource_size(res));
-	if (!obj->regbase) {
-		err = -ENOMEM;
-		goto err_ioremap;
-	}
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		err = -ENODEV;
-		goto err_irq;
-	}
-	err = request_irq(irq, iommu_fault_handler, IRQF_SHARED,
-			  dev_name(&pdev->dev), obj);
-	if (err < 0)
-		goto err_irq;
-	platform_set_drvdata(pdev, obj);
-
-	p = (void *)__get_free_pages(GFP_KERNEL, get_order(IOPGD_TABLE_SIZE));
-	if (!p) {
-		err = -ENOMEM;
-		goto err_pgd;
-	}
-	memset(p, 0, IOPGD_TABLE_SIZE);
-	clean_dcache_area(p, IOPGD_TABLE_SIZE);
-	obj->iopgd = p;
-
-	BUG_ON(!IS_ALIGNED((unsigned long)obj->iopgd, IOPGD_TABLE_SIZE));
-
-	dev_info(&pdev->dev, "%s registered\n", obj->name);
-	return 0;
-
-err_pgd:
-	free_irq(irq, obj);
-err_irq:
-	iounmap(obj->regbase);
-err_ioremap:
-	release_mem_region(res->start, resource_size(res));
-err_mem:
-	clk_put(obj->clk);
-err_clk:
-	kfree(obj);
-	return err;
-}
-
-static int __devexit omap_iommu_remove(struct platform_device *pdev)
-{
-	int irq;
-	struct resource *res;
-	struct iommu *obj = platform_get_drvdata(pdev);
-
-	platform_set_drvdata(pdev, NULL);
-
-	iopgtable_clear_entry_all(obj);
-	free_pages((unsigned long)obj->iopgd, get_order(IOPGD_TABLE_SIZE));
-
-	irq = platform_get_irq(pdev, 0);
-	free_irq(irq, obj);
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(res->start, resource_size(res));
-	iounmap(obj->regbase);
-
-	clk_put(obj->clk);
-	dev_info(&pdev->dev, "%s removed\n", obj->name);
-	kfree(obj);
-	return 0;
-}
-
-static struct platform_driver omap_iommu_driver = {
-	.probe	= omap_iommu_probe,
-	.remove	= __devexit_p(omap_iommu_remove),
-	.driver	= {
-		.name	= "omap-iommu",
-	},
-};
-
-static void iopte_cachep_ctor(void *iopte)
-{
-	clean_dcache_area(iopte, IOPTE_TABLE_SIZE);
-}
-
-static int __init omap_iommu_init(void)
-{
-	struct kmem_cache *p;
-	const unsigned long flags = SLAB_HWCACHE_ALIGN;
-	size_t align = 1 << 10; /* L2 pagetable alignement */
-
-	p = kmem_cache_create("iopte_cache", IOPTE_TABLE_SIZE, align, flags,
-			      iopte_cachep_ctor);
-	if (!p)
-		return -ENOMEM;
-	iopte_cachep = p;
-
-	return platform_driver_register(&omap_iommu_driver);
-}
-module_init(omap_iommu_init);
-
-static void __exit omap_iommu_exit(void)
-{
-	kmem_cache_destroy(iopte_cachep);
-
-	platform_driver_unregister(&omap_iommu_driver);
-}
-module_exit(omap_iommu_exit);
-
-MODULE_DESCRIPTION("omap iommu: tlb and pagetable primitives");
-MODULE_ALIAS("platform:omap-iommu");
-MODULE_AUTHOR("Hiroshi DOYU, Paul Mundt and Toshihiro Kobayashi");
-MODULE_LICENSE("GPL v2");
diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c
deleted file mode 100644
index 79e7fedb8602..000000000000
--- a/arch/arm/plat-omap/iovmm.c
+++ /dev/null
@@ -1,904 +0,0 @@
-/*
- * omap iommu: simple virtual address space management
- *
- * Copyright (C) 2008-2009 Nokia Corporation
- *
- * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.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.
- */
-
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/device.h>
-#include <linux/scatterlist.h>
-
-#include <asm/cacheflush.h>
-#include <asm/mach/map.h>
-
-#include <plat/iommu.h>
-#include <plat/iovmm.h>
-
-#include "iopgtable.h"
-
-/*
- * A device driver needs to create address mappings between:
- *
- * - iommu/device address
- * - physical address
- * - mpu virtual address
- *
- * There are 4 possible patterns for them:
- *
- *    |iova/			  mapping		iommu_		page
- *    | da	pa	va	(d)-(p)-(v)		function	type
- *  ---------------------------------------------------------------------------
- *  1 | c	c	c	 1 - 1 - 1	  _kmap() / _kunmap()	s
- *  2 | c	c,a	c	 1 - 1 - 1	_kmalloc()/ _kfree()	s
- *  3 | c	d	c	 1 - n - 1	  _vmap() / _vunmap()	s
- *  4 | c	d,a	c	 1 - n - 1	_vmalloc()/ _vfree()	n*
- *
- *
- *	'iova':	device iommu virtual address
- *	'da':	alias of 'iova'
- *	'pa':	physical address
- *	'va':	mpu virtual address
- *
- *	'c':	contiguous memory area
- *	'd':	discontiguous memory area
- *	'a':	anonymous memory allocation
- *	'()':	optional feature
- *
- *	'n':	a normal page(4KB) size is used.
- *	's':	multiple iommu superpage(16MB, 1MB, 64KB, 4KB) size is used.
- *
- *	'*':	not yet, but feasible.
- */
-
-static struct kmem_cache *iovm_area_cachep;
-
-/* return total bytes of sg buffers */
-static size_t sgtable_len(const struct sg_table *sgt)
-{
-	unsigned int i, total = 0;
-	struct scatterlist *sg;
-
-	if (!sgt)
-		return 0;
-
-	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
-		size_t bytes;
-
-		bytes = sg->length;
-
-		if (!iopgsz_ok(bytes)) {
-			pr_err("%s: sg[%d] not iommu pagesize(%x)\n",
-			       __func__, i, bytes);
-			return 0;
-		}
-
-		total += bytes;
-	}
-
-	return total;
-}
-#define sgtable_ok(x)	(!!sgtable_len(x))
-
-static unsigned max_alignment(u32 addr)
-{
-	int i;
-	unsigned pagesize[] = { SZ_16M, SZ_1M, SZ_64K, SZ_4K, };
-	for (i = 0; i < ARRAY_SIZE(pagesize) && addr & (pagesize[i] - 1); i++)
-		;
-	return (i < ARRAY_SIZE(pagesize)) ? pagesize[i] : 0;
-}
-
-/*
- * calculate the optimal number sg elements from total bytes based on
- * iommu superpages
- */
-static unsigned sgtable_nents(size_t bytes, u32 da, u32 pa)
-{
-	unsigned nr_entries = 0, ent_sz;
-
-	if (!IS_ALIGNED(bytes, PAGE_SIZE)) {
-		pr_err("%s: wrong size %08x\n", __func__, bytes);
-		return 0;
-	}
-
-	while (bytes) {
-		ent_sz = max_alignment(da | pa);
-		ent_sz = min_t(unsigned, ent_sz, iopgsz_max(bytes));
-		nr_entries++;
-		da += ent_sz;
-		pa += ent_sz;
-		bytes -= ent_sz;
-	}
-
-	return nr_entries;
-}
-
-/* allocate and initialize sg_table header(a kind of 'superblock') */
-static struct sg_table *sgtable_alloc(const size_t bytes, u32 flags,
-							u32 da, u32 pa)
-{
-	unsigned int nr_entries;
-	int err;
-	struct sg_table *sgt;
-
-	if (!bytes)
-		return ERR_PTR(-EINVAL);
-
-	if (!IS_ALIGNED(bytes, PAGE_SIZE))
-		return ERR_PTR(-EINVAL);
-
-	if (flags & IOVMF_LINEAR) {
-		nr_entries = sgtable_nents(bytes, da, pa);
-		if (!nr_entries)
-			return ERR_PTR(-EINVAL);
-	} else
-		nr_entries =  bytes / PAGE_SIZE;
-
-	sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
-	if (!sgt)
-		return ERR_PTR(-ENOMEM);
-
-	err = sg_alloc_table(sgt, nr_entries, GFP_KERNEL);
-	if (err) {
-		kfree(sgt);
-		return ERR_PTR(err);
-	}
-
-	pr_debug("%s: sgt:%p(%d entries)\n", __func__, sgt, nr_entries);
-
-	return sgt;
-}
-
-/* free sg_table header(a kind of superblock) */
-static void sgtable_free(struct sg_table *sgt)
-{
-	if (!sgt)
-		return;
-
-	sg_free_table(sgt);
-	kfree(sgt);
-
-	pr_debug("%s: sgt:%p\n", __func__, sgt);
-}
-
-/* map 'sglist' to a contiguous mpu virtual area and return 'va' */
-static void *vmap_sg(const struct sg_table *sgt)
-{
-	u32 va;
-	size_t total;
-	unsigned int i;
-	struct scatterlist *sg;
-	struct vm_struct *new;
-	const struct mem_type *mtype;
-
-	mtype = get_mem_type(MT_DEVICE);
-	if (!mtype)
-		return ERR_PTR(-EINVAL);
-
-	total = sgtable_len(sgt);
-	if (!total)
-		return ERR_PTR(-EINVAL);
-
-	new = __get_vm_area(total, VM_IOREMAP, VMALLOC_START, VMALLOC_END);
-	if (!new)
-		return ERR_PTR(-ENOMEM);
-	va = (u32)new->addr;
-
-	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
-		size_t bytes;
-		u32 pa;
-		int err;
-
-		pa = sg_phys(sg);
-		bytes = sg->length;
-
-		BUG_ON(bytes != PAGE_SIZE);
-
-		err = ioremap_page(va,  pa, mtype);
-		if (err)
-			goto err_out;
-
-		va += bytes;
-	}
-
-	flush_cache_vmap((unsigned long)new->addr,
-				(unsigned long)(new->addr + total));
-	return new->addr;
-
-err_out:
-	WARN_ON(1); /* FIXME: cleanup some mpu mappings */
-	vunmap(new->addr);
-	return ERR_PTR(-EAGAIN);
-}
-
-static inline void vunmap_sg(const void *va)
-{
-	vunmap(va);
-}
-
-static struct iovm_struct *__find_iovm_area(struct iommu *obj, const u32 da)
-{
-	struct iovm_struct *tmp;
-
-	list_for_each_entry(tmp, &obj->mmap, list) {
-		if ((da >= tmp->da_start) && (da < tmp->da_end)) {
-			size_t len;
-
-			len = tmp->da_end - tmp->da_start;
-
-			dev_dbg(obj->dev, "%s: %08x-%08x-%08x(%x) %08x\n",
-				__func__, tmp->da_start, da, tmp->da_end, len,
-				tmp->flags);
-
-			return tmp;
-		}
-	}
-
-	return NULL;
-}
-
-/**
- * find_iovm_area  -  find iovma which includes @da
- * @da:		iommu device virtual address
- *
- * Find the existing iovma starting at @da
- */
-struct iovm_struct *find_iovm_area(struct iommu *obj, u32 da)
-{
-	struct iovm_struct *area;
-
-	mutex_lock(&obj->mmap_lock);
-	area = __find_iovm_area(obj, da);
-	mutex_unlock(&obj->mmap_lock);
-
-	return area;
-}
-EXPORT_SYMBOL_GPL(find_iovm_area);
-
-/*
- * This finds the hole(area) which fits the requested address and len
- * in iovmas mmap, and returns the new allocated iovma.
- */
-static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da,
-					   size_t bytes, u32 flags)
-{
-	struct iovm_struct *new, *tmp;
-	u32 start, prev_end, alignment;
-
-	if (!obj || !bytes)
-		return ERR_PTR(-EINVAL);
-
-	start = da;
-	alignment = PAGE_SIZE;
-
-	if (~flags & IOVMF_DA_FIXED) {
-		/* Don't map address 0 */
-		start = obj->da_start ? obj->da_start : alignment;
-
-		if (flags & IOVMF_LINEAR)
-			alignment = iopgsz_max(bytes);
-		start = roundup(start, alignment);
-	} else if (start < obj->da_start || start > obj->da_end ||
-					obj->da_end - start < bytes) {
-		return ERR_PTR(-EINVAL);
-	}
-
-	tmp = NULL;
-	if (list_empty(&obj->mmap))
-		goto found;
-
-	prev_end = 0;
-	list_for_each_entry(tmp, &obj->mmap, list) {
-
-		if (prev_end > start)
-			break;
-
-		if (tmp->da_start > start && (tmp->da_start - start) >= bytes)
-			goto found;
-
-		if (tmp->da_end >= start && ~flags & IOVMF_DA_FIXED)
-			start = roundup(tmp->da_end + 1, alignment);
-
-		prev_end = tmp->da_end;
-	}
-
-	if ((start >= prev_end) && (obj->da_end - start >= bytes))
-		goto found;
-
-	dev_dbg(obj->dev, "%s: no space to fit %08x(%x) flags: %08x\n",
-		__func__, da, bytes, flags);
-
-	return ERR_PTR(-EINVAL);
-
-found:
-	new = kmem_cache_zalloc(iovm_area_cachep, GFP_KERNEL);
-	if (!new)
-		return ERR_PTR(-ENOMEM);
-
-	new->iommu = obj;
-	new->da_start = start;
-	new->da_end = start + bytes;
-	new->flags = flags;
-
-	/*
-	 * keep ascending order of iovmas
-	 */
-	if (tmp)
-		list_add_tail(&new->list, &tmp->list);
-	else
-		list_add(&new->list, &obj->mmap);
-
-	dev_dbg(obj->dev, "%s: found %08x-%08x-%08x(%x) %08x\n",
-		__func__, new->da_start, start, new->da_end, bytes, flags);
-
-	return new;
-}
-
-static void free_iovm_area(struct iommu *obj, struct iovm_struct *area)
-{
-	size_t bytes;
-
-	BUG_ON(!obj || !area);
-
-	bytes = area->da_end - area->da_start;
-
-	dev_dbg(obj->dev, "%s: %08x-%08x(%x) %08x\n",
-		__func__, area->da_start, area->da_end, bytes, area->flags);
-
-	list_del(&area->list);
-	kmem_cache_free(iovm_area_cachep, area);
-}
-
-/**
- * da_to_va - convert (d) to (v)
- * @obj:	objective iommu
- * @da:		iommu device virtual address
- * @va:		mpu virtual address
- *
- * Returns mpu virtual addr which corresponds to a given device virtual addr
- */
-void *da_to_va(struct iommu *obj, u32 da)
-{
-	void *va = NULL;
-	struct iovm_struct *area;
-
-	mutex_lock(&obj->mmap_lock);
-
-	area = __find_iovm_area(obj, da);
-	if (!area) {
-		dev_dbg(obj->dev, "%s: no da area(%08x)\n", __func__, da);
-		goto out;
-	}
-	va = area->va;
-out:
-	mutex_unlock(&obj->mmap_lock);
-
-	return va;
-}
-EXPORT_SYMBOL_GPL(da_to_va);
-
-static void sgtable_fill_vmalloc(struct sg_table *sgt, void *_va)
-{
-	unsigned int i;
-	struct scatterlist *sg;
-	void *va = _va;
-	void *va_end;
-
-	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
-		struct page *pg;
-		const size_t bytes = PAGE_SIZE;
-
-		/*
-		 * iommu 'superpage' isn't supported with 'iommu_vmalloc()'
-		 */
-		pg = vmalloc_to_page(va);
-		BUG_ON(!pg);
-		sg_set_page(sg, pg, bytes, 0);
-
-		va += bytes;
-	}
-
-	va_end = _va + PAGE_SIZE * i;
-}
-
-static inline void sgtable_drain_vmalloc(struct sg_table *sgt)
-{
-	/*
-	 * Actually this is not necessary at all, just exists for
-	 * consistency of the code readability.
-	 */
-	BUG_ON(!sgt);
-}
-
-static void sgtable_fill_kmalloc(struct sg_table *sgt, u32 pa, u32 da,
-								size_t len)
-{
-	unsigned int i;
-	struct scatterlist *sg;
-
-	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
-		unsigned bytes;
-
-		bytes = max_alignment(da | pa);
-		bytes = min_t(unsigned, bytes, iopgsz_max(len));
-
-		BUG_ON(!iopgsz_ok(bytes));
-
-		sg_set_buf(sg, phys_to_virt(pa), bytes);
-		/*
-		 * 'pa' is cotinuous(linear).
-		 */
-		pa += bytes;
-		da += bytes;
-		len -= bytes;
-	}
-	BUG_ON(len);
-}
-
-static inline void sgtable_drain_kmalloc(struct sg_table *sgt)
-{
-	/*
-	 * Actually this is not necessary at all, just exists for
-	 * consistency of the code readability
-	 */
-	BUG_ON(!sgt);
-}
-
-/* create 'da' <-> 'pa' mapping from 'sgt' */
-static int map_iovm_area(struct iommu *obj, struct iovm_struct *new,
-			 const struct sg_table *sgt, u32 flags)
-{
-	int err;
-	unsigned int i, j;
-	struct scatterlist *sg;
-	u32 da = new->da_start;
-
-	if (!obj || !sgt)
-		return -EINVAL;
-
-	BUG_ON(!sgtable_ok(sgt));
-
-	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
-		u32 pa;
-		int pgsz;
-		size_t bytes;
-		struct iotlb_entry e;
-
-		pa = sg_phys(sg);
-		bytes = sg->length;
-
-		flags &= ~IOVMF_PGSZ_MASK;
-		pgsz = bytes_to_iopgsz(bytes);
-		if (pgsz < 0)
-			goto err_out;
-		flags |= pgsz;
-
-		pr_debug("%s: [%d] %08x %08x(%x)\n", __func__,
-			 i, da, pa, bytes);
-
-		iotlb_init_entry(&e, da, pa, flags);
-		err = iopgtable_store_entry(obj, &e);
-		if (err)
-			goto err_out;
-
-		da += bytes;
-	}
-	return 0;
-
-err_out:
-	da = new->da_start;
-
-	for_each_sg(sgt->sgl, sg, i, j) {
-		size_t bytes;
-
-		bytes = iopgtable_clear_entry(obj, da);
-
-		BUG_ON(!iopgsz_ok(bytes));
-
-		da += bytes;
-	}
-	return err;
-}
-
-/* release 'da' <-> 'pa' mapping */
-static void unmap_iovm_area(struct iommu *obj, struct iovm_struct *area)
-{
-	u32 start;
-	size_t total = area->da_end - area->da_start;
-
-	BUG_ON((!total) || !IS_ALIGNED(total, PAGE_SIZE));
-
-	start = area->da_start;
-	while (total > 0) {
-		size_t bytes;
-
-		bytes = iopgtable_clear_entry(obj, start);
-		if (bytes == 0)
-			bytes = PAGE_SIZE;
-		else
-			dev_dbg(obj->dev, "%s: unmap %08x(%x) %08x\n",
-				__func__, start, bytes, area->flags);
-
-		BUG_ON(!IS_ALIGNED(bytes, PAGE_SIZE));
-
-		total -= bytes;
-		start += bytes;
-	}
-	BUG_ON(total);
-}
-
-/* template function for all unmapping */
-static struct sg_table *unmap_vm_area(struct iommu *obj, const u32 da,
-				      void (*fn)(const void *), u32 flags)
-{
-	struct sg_table *sgt = NULL;
-	struct iovm_struct *area;
-
-	if (!IS_ALIGNED(da, PAGE_SIZE)) {
-		dev_err(obj->dev, "%s: alignment err(%08x)\n", __func__, da);
-		return NULL;
-	}
-
-	mutex_lock(&obj->mmap_lock);
-
-	area = __find_iovm_area(obj, da);
-	if (!area) {
-		dev_dbg(obj->dev, "%s: no da area(%08x)\n", __func__, da);
-		goto out;
-	}
-
-	if ((area->flags & flags) != flags) {
-		dev_err(obj->dev, "%s: wrong flags(%08x)\n", __func__,
-			area->flags);
-		goto out;
-	}
-	sgt = (struct sg_table *)area->sgt;
-
-	unmap_iovm_area(obj, area);
-
-	fn(area->va);
-
-	dev_dbg(obj->dev, "%s: %08x-%08x-%08x(%x) %08x\n", __func__,
-		area->da_start, da, area->da_end,
-		area->da_end - area->da_start, area->flags);
-
-	free_iovm_area(obj, area);
-out:
-	mutex_unlock(&obj->mmap_lock);
-
-	return sgt;
-}
-
-static u32 map_iommu_region(struct iommu *obj, u32 da,
-	      const struct sg_table *sgt, void *va, size_t bytes, u32 flags)
-{
-	int err = -ENOMEM;
-	struct iovm_struct *new;
-
-	mutex_lock(&obj->mmap_lock);
-
-	new = alloc_iovm_area(obj, da, bytes, flags);
-	if (IS_ERR(new)) {
-		err = PTR_ERR(new);
-		goto err_alloc_iovma;
-	}
-	new->va = va;
-	new->sgt = sgt;
-
-	if (map_iovm_area(obj, new, sgt, new->flags))
-		goto err_map;
-
-	mutex_unlock(&obj->mmap_lock);
-
-	dev_dbg(obj->dev, "%s: da:%08x(%x) flags:%08x va:%p\n",
-		__func__, new->da_start, bytes, new->flags, va);
-
-	return new->da_start;
-
-err_map:
-	free_iovm_area(obj, new);
-err_alloc_iovma:
-	mutex_unlock(&obj->mmap_lock);
-	return err;
-}
-
-static inline u32 __iommu_vmap(struct iommu *obj, u32 da,
-		 const struct sg_table *sgt, void *va, size_t bytes, u32 flags)
-{
-	return map_iommu_region(obj, da, sgt, va, bytes, flags);
-}
-
-/**
- * iommu_vmap  -  (d)-(p)-(v) address mapper
- * @obj:	objective iommu
- * @sgt:	address of scatter gather table
- * @flags:	iovma and page property
- *
- * Creates 1-n-1 mapping with given @sgt and returns @da.
- * All @sgt element must be io page size aligned.
- */
-u32 iommu_vmap(struct iommu *obj, u32 da, const struct sg_table *sgt,
-		 u32 flags)
-{
-	size_t bytes;
-	void *va = NULL;
-
-	if (!obj || !obj->dev || !sgt)
-		return -EINVAL;
-
-	bytes = sgtable_len(sgt);
-	if (!bytes)
-		return -EINVAL;
-	bytes = PAGE_ALIGN(bytes);
-
-	if (flags & IOVMF_MMIO) {
-		va = vmap_sg(sgt);
-		if (IS_ERR(va))
-			return PTR_ERR(va);
-	}
-
-	flags |= IOVMF_DISCONT;
-	flags |= IOVMF_MMIO;
-
-	da = __iommu_vmap(obj, da, sgt, va, bytes, flags);
-	if (IS_ERR_VALUE(da))
-		vunmap_sg(va);
-
-	return da;
-}
-EXPORT_SYMBOL_GPL(iommu_vmap);
-
-/**
- * iommu_vunmap  -  release virtual mapping obtained by 'iommu_vmap()'
- * @obj:	objective iommu
- * @da:		iommu device virtual address
- *
- * Free the iommu virtually contiguous memory area starting at
- * @da, which was returned by 'iommu_vmap()'.
- */
-struct sg_table *iommu_vunmap(struct iommu *obj, u32 da)
-{
-	struct sg_table *sgt;
-	/*
-	 * 'sgt' is allocated before 'iommu_vmalloc()' is called.
-	 * Just returns 'sgt' to the caller to free
-	 */
-	sgt = unmap_vm_area(obj, da, vunmap_sg, IOVMF_DISCONT | IOVMF_MMIO);
-	if (!sgt)
-		dev_dbg(obj->dev, "%s: No sgt\n", __func__);
-	return sgt;
-}
-EXPORT_SYMBOL_GPL(iommu_vunmap);
-
-/**
- * iommu_vmalloc  -  (d)-(p)-(v) address allocator and mapper
- * @obj:	objective iommu
- * @da:		contiguous iommu virtual memory
- * @bytes:	allocation size
- * @flags:	iovma and page property
- *
- * Allocate @bytes linearly and creates 1-n-1 mapping and returns
- * @da again, which might be adjusted if 'IOVMF_DA_FIXED' is not set.
- */
-u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes, u32 flags)
-{
-	void *va;
-	struct sg_table *sgt;
-
-	if (!obj || !obj->dev || !bytes)
-		return -EINVAL;
-
-	bytes = PAGE_ALIGN(bytes);
-
-	va = vmalloc(bytes);
-	if (!va)
-		return -ENOMEM;
-
-	flags |= IOVMF_DISCONT;
-	flags |= IOVMF_ALLOC;
-
-	sgt = sgtable_alloc(bytes, flags, da, 0);
-	if (IS_ERR(sgt)) {
-		da = PTR_ERR(sgt);
-		goto err_sgt_alloc;
-	}
-	sgtable_fill_vmalloc(sgt, va);
-
-	da = __iommu_vmap(obj, da, sgt, va, bytes, flags);
-	if (IS_ERR_VALUE(da))
-		goto err_iommu_vmap;
-
-	return da;
-
-err_iommu_vmap:
-	sgtable_drain_vmalloc(sgt);
-	sgtable_free(sgt);
-err_sgt_alloc:
-	vfree(va);
-	return da;
-}
-EXPORT_SYMBOL_GPL(iommu_vmalloc);
-
-/**
- * iommu_vfree  -  release memory allocated by 'iommu_vmalloc()'
- * @obj:	objective iommu
- * @da:		iommu device virtual address
- *
- * Frees the iommu virtually continuous memory area starting at
- * @da, as obtained from 'iommu_vmalloc()'.
- */
-void iommu_vfree(struct iommu *obj, const u32 da)
-{
-	struct sg_table *sgt;
-
-	sgt = unmap_vm_area(obj, da, vfree, IOVMF_DISCONT | IOVMF_ALLOC);
-	if (!sgt)
-		dev_dbg(obj->dev, "%s: No sgt\n", __func__);
-	sgtable_free(sgt);
-}
-EXPORT_SYMBOL_GPL(iommu_vfree);
-
-static u32 __iommu_kmap(struct iommu *obj, u32 da, u32 pa, void *va,
-			  size_t bytes, u32 flags)
-{
-	struct sg_table *sgt;
-
-	sgt = sgtable_alloc(bytes, flags, da, pa);
-	if (IS_ERR(sgt))
-		return PTR_ERR(sgt);
-
-	sgtable_fill_kmalloc(sgt, pa, da, bytes);
-
-	da = map_iommu_region(obj, da, sgt, va, bytes, flags);
-	if (IS_ERR_VALUE(da)) {
-		sgtable_drain_kmalloc(sgt);
-		sgtable_free(sgt);
-	}
-
-	return da;
-}
-
-/**
- * iommu_kmap  -  (d)-(p)-(v) address mapper
- * @obj:	objective iommu
- * @da:		contiguous iommu virtual memory
- * @pa:		contiguous physical memory
- * @flags:	iovma and page property
- *
- * Creates 1-1-1 mapping and returns @da again, which can be
- * adjusted if 'IOVMF_DA_FIXED' is not set.
- */
-u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes,
-		 u32 flags)
-{
-	void *va;
-
-	if (!obj || !obj->dev || !bytes)
-		return -EINVAL;
-
-	bytes = PAGE_ALIGN(bytes);
-
-	va = ioremap(pa, bytes);
-	if (!va)
-		return -ENOMEM;
-
-	flags |= IOVMF_LINEAR;
-	flags |= IOVMF_MMIO;
-
-	da = __iommu_kmap(obj, da, pa, va, bytes, flags);
-	if (IS_ERR_VALUE(da))
-		iounmap(va);
-
-	return da;
-}
-EXPORT_SYMBOL_GPL(iommu_kmap);
-
-/**
- * iommu_kunmap  -  release virtual mapping obtained by 'iommu_kmap()'
- * @obj:	objective iommu
- * @da:		iommu device virtual address
- *
- * Frees the iommu virtually contiguous memory area starting at
- * @da, which was passed to and was returned by'iommu_kmap()'.
- */
-void iommu_kunmap(struct iommu *obj, u32 da)
-{
-	struct sg_table *sgt;
-	typedef void (*func_t)(const void *);
-
-	sgt = unmap_vm_area(obj, da, (func_t)iounmap,
-			    IOVMF_LINEAR | IOVMF_MMIO);
-	if (!sgt)
-		dev_dbg(obj->dev, "%s: No sgt\n", __func__);
-	sgtable_free(sgt);
-}
-EXPORT_SYMBOL_GPL(iommu_kunmap);
-
-/**
- * iommu_kmalloc  -  (d)-(p)-(v) address allocator and mapper
- * @obj:	objective iommu
- * @da:		contiguous iommu virtual memory
- * @bytes:	bytes for allocation
- * @flags:	iovma and page property
- *
- * Allocate @bytes linearly and creates 1-1-1 mapping and returns
- * @da again, which might be adjusted if 'IOVMF_DA_FIXED' is not set.
- */
-u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes, u32 flags)
-{
-	void *va;
-	u32 pa;
-
-	if (!obj || !obj->dev || !bytes)
-		return -EINVAL;
-
-	bytes = PAGE_ALIGN(bytes);
-
-	va = kmalloc(bytes, GFP_KERNEL | GFP_DMA);
-	if (!va)
-		return -ENOMEM;
-	pa = virt_to_phys(va);
-
-	flags |= IOVMF_LINEAR;
-	flags |= IOVMF_ALLOC;
-
-	da = __iommu_kmap(obj, da, pa, va, bytes, flags);
-	if (IS_ERR_VALUE(da))
-		kfree(va);
-
-	return da;
-}
-EXPORT_SYMBOL_GPL(iommu_kmalloc);
-
-/**
- * iommu_kfree  -  release virtual mapping obtained by 'iommu_kmalloc()'
- * @obj:	objective iommu
- * @da:		iommu device virtual address
- *
- * Frees the iommu virtually contiguous memory area starting at
- * @da, which was passed to and was returned by'iommu_kmalloc()'.
- */
-void iommu_kfree(struct iommu *obj, u32 da)
-{
-	struct sg_table *sgt;
-
-	sgt = unmap_vm_area(obj, da, kfree, IOVMF_LINEAR | IOVMF_ALLOC);
-	if (!sgt)
-		dev_dbg(obj->dev, "%s: No sgt\n", __func__);
-	sgtable_free(sgt);
-}
-EXPORT_SYMBOL_GPL(iommu_kfree);
-
-
-static int __init iovmm_init(void)
-{
-	const unsigned long flags = SLAB_HWCACHE_ALIGN;
-	struct kmem_cache *p;
-
-	p = kmem_cache_create("iovm_area_cache", sizeof(struct iovm_struct), 0,
-			      flags, NULL);
-	if (!p)
-		return -ENOMEM;
-	iovm_area_cachep = p;
-
-	return 0;
-}
-module_init(iovmm_init);
-
-static void __exit iovmm_exit(void)
-{
-	kmem_cache_destroy(iovm_area_cachep);
-}
-module_exit(iovmm_exit);
-
-MODULE_DESCRIPTION("omap iommu: simple virtual address space management");
-MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@nokia.com>");
-MODULE_LICENSE("GPL v2");