Major layout change to the packages directory

Having one monolithic packages directory makes it hard to find things
and is generally overwhelming. This commit splits it into several
logical sections roughly based on function, recipes.txt gives more
information about the classifications used.

The opportunity is also used to switch from "packages" to "recipes"
as used in OpenEmbedded as the term "packages" can be confusing to
people and has many different meanings.

Not all recipes have been classified yet, this is just a first pass
at separating things out. Some packages are moved to meta-extras as
they're no longer actively used or maintained.

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

1 files changed, 1083 insertions, 0 deletions

diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/isp/iommu/0004-omap-iommu-simple-virtual-address-space-management.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/isp/iommu/0004-omap-iommu-simple-virtual-address-space-management.patch
new file mode 100644
index 0000000000..945778b943
--- /dev/null
+++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/isp/iommu/0004-omap-iommu-simple-virtual-address-space-management.patch
@@ -0,0 +1,1083 @@
+From 07365182b998af3dc2b79e822b8e21a3f50262c4 Mon Sep 17 00:00:00 2001
+From: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
+Date: Wed, 28 Jan 2009 21:32:08 +0200
+Subject: [PATCH] omap iommu: simple virtual address space management
+
+This patch provides a device drivers, which has a omap iommu, with
+address mapping APIs between device virtual address(iommu), physical
+address and MPU virtual address.
+
+There are 4 possible patterns for iommu virtual address(iova/da) mapping.
+
+    |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':	dicontiguous 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.
+
+Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
+---
+ arch/arm/include/asm/io.h               |    6 +
+ arch/arm/mm/ioremap.c                   |   11 +
+ arch/arm/plat-omap/include/mach/iovmm.h |   94 ++++
+ arch/arm/plat-omap/iovmm.c              |  891 +++++++++++++++++++++++++++++++
+ 4 files changed, 1002 insertions(+), 0 deletions(-)
+ create mode 100644 arch/arm/plat-omap/include/mach/iovmm.h
+ create mode 100644 arch/arm/plat-omap/iovmm.c
+
+diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
+index d2a59cf..cbdadfe 100644
+--- a/arch/arm/include/asm/io.h
++++ b/arch/arm/include/asm/io.h
+@@ -75,6 +75,12 @@ extern void __iomem * __arm_ioremap(unsigned long, size_t, unsigned int);
+ extern void __iounmap(volatile void __iomem *addr);
+ 
+ /*
++ * external interface to remap single page with appropriate type
++ */
++extern int ioremap_page(unsigned long virt, unsigned long phys,
++			unsigned int mtype);
++
++/*
+  * Bad read/write accesses...
+  */
+ extern void __readwrite_bug(const char *fn);
+diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
+index 9f88dd3..8441351 100644
+--- a/arch/arm/mm/ioremap.c
++++ b/arch/arm/mm/ioremap.c
+@@ -110,6 +110,17 @@ static int remap_area_pages(unsigned long start, unsigned long pfn,
+ 	return err;
+ }
+ 
++int ioremap_page(unsigned long virt, unsigned long phys, unsigned int mtype)
++{
++	const struct mem_type *type;
++
++	type = get_mem_type(mtype);
++	if (!type)
++		return -EINVAL;
++
++	return remap_area_pages(virt, __phys_to_pfn(phys), PAGE_SIZE, type);
++}
++EXPORT_SYMBOL(ioremap_page);
+ 
+ void __check_kvm_seq(struct mm_struct *mm)
+ {
+diff --git a/arch/arm/plat-omap/include/mach/iovmm.h b/arch/arm/plat-omap/include/mach/iovmm.h
+new file mode 100644
+index 0000000..bdc7ce5
+--- /dev/null
++++ b/arch/arm/plat-omap/include/mach/iovmm.h
+@@ -0,0 +1,94 @@
++/*
++ * 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.
++ */
++
++#ifndef __IOMMU_MMAP_H
++#define __IOMMU_MMAP_H
++
++struct iovm_struct {
++	struct iommu		*iommu;	/* iommu object which this belongs to */
++	u32			da_start; /* area definition */
++	u32			da_end;
++	u32			flags; /* IOVMF_: see below */
++	struct list_head	list; /* linked in ascending order */
++	const struct sg_table	*sgt; /* keep 'page' <-> 'da' mapping */
++	void			*va; /* mpu side mapped address */
++};
++
++/*
++ * IOVMF_FLAGS: attribute for iommu virtual memory area(iovma)
++ *
++ * lower 16 bit is used for h/w and upper 16 bit is for s/w.
++ */
++#define IOVMF_SW_SHIFT		16
++#define IOVMF_HW_SIZE		(1 << IOVMF_SW_SHIFT)
++#define IOVMF_HW_MASK		(IOVMF_HW_SIZE - 1)
++#define IOVMF_SW_MASK		(~IOVMF_HW_MASK)UL
++
++/*
++ * iovma: h/w flags derived from cam and ram attribute
++ */
++#define IOVMF_CAM_MASK		(~((1 << 10) - 1))
++#define IOVMF_RAM_MASK		(~IOVMF_CAM_MASK)
++
++#define IOVMF_PGSZ_MASK		(3 << 0)
++#define IOVMF_PGSZ_1M		MMU_CAM_PGSZ_1M
++#define IOVMF_PGSZ_64K		MMU_CAM_PGSZ_64K
++#define IOVMF_PGSZ_4K		MMU_CAM_PGSZ_4K
++#define IOVMF_PGSZ_16M		MMU_CAM_PGSZ_16M
++
++#define IOVMF_ENDIAN_MASK	(1 << 9)
++#define IOVMF_ENDIAN_BIG	MMU_RAM_ENDIAN_BIG
++#define IOVMF_ENDIAN_LITTLE	MMU_RAM_ENDIAN_LITTLE
++
++#define IOVMF_ELSZ_MASK		(3 << 7)
++#define IOVMF_ELSZ_8		MMU_RAM_ELSZ_8
++#define IOVMF_ELSZ_16		MMU_RAM_ELSZ_16
++#define IOVMF_ELSZ_32		MMU_RAM_ELSZ_32
++#define IOVMF_ELSZ_NONE		MMU_RAM_ELSZ_NONE
++
++#define IOVMF_MIXED_MASK	(1 << 6)
++#define IOVMF_MIXED		MMU_RAM_MIXED
++
++/*
++ * iovma: s/w flags, used for mapping and umapping internally.
++ */
++#define IOVMF_MMIO		(1 << IOVMF_SW_SHIFT)
++#define IOVMF_ALLOC		(2 << IOVMF_SW_SHIFT)
++#define IOVMF_ALLOC_MASK	(3 << IOVMF_SW_SHIFT)
++
++/* "superpages" is supported just with physically linear pages */
++#define IOVMF_DISCONT		(1 << (2 + IOVMF_SW_SHIFT))
++#define IOVMF_LINEAR		(2 << (2 + IOVMF_SW_SHIFT))
++#define IOVMF_LINEAR_MASK	(3 << (2 + IOVMF_SW_SHIFT))
++
++#define IOVMF_DA_FIXED		(1 << (4 + IOVMF_SW_SHIFT))
++#define IOVMF_DA_ANON		(2 << (4 + IOVMF_SW_SHIFT))
++#define IOVMF_DA_MASK		(3 << (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,
++			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);
++
++#endif /* __IOMMU_MMAP_H */
+diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c
+new file mode 100644
+index 0000000..6726d10
+--- /dev/null
++++ b/arch/arm/plat-omap/iovmm.c
+@@ -0,0 +1,891 @@
++/*
++ * 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/vmalloc.h>
++#include <linux/device.h>
++#include <linux/scatterlist.h>
++
++#include <asm/io.h>
++#include <asm/cacheflush.h>
++
++#include <mach/iommu.h>
++#include <mach/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':	dicontiguous 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_dma_len(sg);
++
++		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))
++
++/*
++ * calculate the optimal number sg elements from total bytes based on
++ * iommu superpages
++ */
++static unsigned int sgtable_nents(size_t bytes)
++{
++	int i;
++	unsigned int nr_entries;
++	const unsigned long pagesize[] = { SZ_16M, SZ_1M, SZ_64K, SZ_4K, };
++
++	if (!IS_ALIGNED(bytes, PAGE_SIZE)) {
++		pr_err("%s: wrong size %08x\n", __func__, bytes);
++		return 0;
++	}
++
++	nr_entries = 0;
++	for (i = 0; i < ARRAY_SIZE(pagesize); i++) {
++		if (bytes >= pagesize[i]) {
++			nr_entries += (bytes / pagesize[i]);
++			bytes %= pagesize[i];
++		}
++	}
++	BUG_ON(bytes);
++
++	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)
++{
++	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);
++
++	/* FIXME: IOVMF_DA_FIXED should support 'superpages' */
++	if ((flags & IOVMF_LINEAR) && (flags & IOVMF_DA_ANON)) {
++		nr_entries = sgtable_nents(bytes);
++		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)
++		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;
++
++	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_dma_len(sg);
++
++		BUG_ON(bytes != PAGE_SIZE);
++
++		err = ioremap_page(va,  pa, MT_DEVICE);
++		if (err)
++			goto err_out;
++
++		va += bytes;
++	}
++
++	flush_cache_vmap(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, alignement;
++
++	if (!obj || !bytes)
++		return ERR_PTR(-EINVAL);
++
++	start = da;
++	alignement = PAGE_SIZE;
++
++	if (flags & IOVMF_DA_ANON) {
++		/*
++		 * Reserve the first page for NULL
++		 */
++		start = PAGE_SIZE;
++		if (flags & IOVMF_LINEAR)
++			alignement = iopgsz_max(bytes);
++		start = roundup(start, alignement);
++	}
++
++	tmp = NULL;
++	if (list_empty(&obj->mmap))
++		goto found;
++
++	prev_end = 0;
++	list_for_each_entry(tmp, &obj->mmap, list) {
++
++		if ((prev_end <= start) && (start + bytes < tmp->da_start))
++			goto found;
++
++		if (flags & IOVMF_DA_ANON)
++			start = roundup(tmp->da_end, alignement);
++
++		prev_end = tmp->da_end;
++	}
++
++	if ((start >= prev_end) && (ULONG_MAX - 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_warn(obj->dev, "%s: no da area(%08x)\n", __func__, da);
++		goto out;
++	}
++	va = area->va;
++	mutex_unlock(&obj->mmap_lock);
++out:
++	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;
++	flush_cache_vmap(_va, va_end);
++}
++
++static inline void sgtable_drain_vmalloc(struct sg_table *sgt)
++{
++	/*
++	 * Actually this is not necessary at all, just exists for
++	 * consistency of the code readibility.
++	 */
++	BUG_ON(!sgt);
++}
++
++static void sgtable_fill_kmalloc(struct sg_table *sgt, u32 pa, size_t len)
++{
++	unsigned int i;
++	struct scatterlist *sg;
++	void *va;
++
++	va = phys_to_virt(pa);
++
++	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
++		size_t bytes;
++
++		bytes = iopgsz_max(len);
++
++		BUG_ON(!iopgsz_ok(bytes));
++
++		sg_set_buf(sg, phys_to_virt(pa), bytes);
++		/*
++		 * 'pa' is cotinuous(linear).
++		 */
++		pa += bytes;
++		len -= bytes;
++	}
++	BUG_ON(len);
++
++	clean_dcache_area(va, 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 readibility
++	 */
++	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 || !new || !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_dma_len(sg);
++
++		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;
++
++	BUG_ON(in_interrupt());
++
++	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_err(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;
++
++	if (!obj || !obj->dev || !sgt)
++		return -EINVAL;
++
++	bytes = sgtable_len(sgt);
++	if (!bytes)
++		return -EINVAL;
++	bytes = PAGE_ALIGN(bytes);
++
++	va = vmap_sg(sgt);
++	if (IS_ERR(va))
++		return PTR_ERR(va);
++
++	flags &= IOVMF_HW_MASK;
++	flags |= IOVMF_DISCONT;
++	flags |= IOVMF_MMIO;
++	flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON);
++
++	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_err(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_ANON' is 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;
++
++	sgt = sgtable_alloc(bytes, flags);
++	if (IS_ERR(sgt)) {
++		da = PTR_ERR(sgt);
++		goto err_sgt_alloc;
++	}
++	sgtable_fill_vmalloc(sgt, va);
++
++	flags &= IOVMF_HW_MASK;
++	flags |= IOVMF_DISCONT;
++	flags |= IOVMF_ALLOC;
++	flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON);
++
++	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_err(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);
++	if (IS_ERR(sgt))
++		return PTR_ERR(sgt);
++
++	sgtable_fill_kmalloc(sgt, pa, 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_ANON' is 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_HW_MASK;
++	flags |= IOVMF_LINEAR;
++	flags |= IOVMF_MMIO;
++	flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON);
++
++	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;
++
++	sgt = unmap_vm_area(obj, da, __iounmap, IOVMF_LINEAR | IOVMF_MMIO);
++	if (!sgt)
++		dev_err(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_ANON' is 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_HW_MASK;
++	flags |= IOVMF_LINEAR;
++	flags |= IOVMF_ALLOC;
++	flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON);
++
++	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_err(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");
+-- 
+1.5.6.5
+