drivers/gpu/ion/ion_system_heap.c - fp2-dev/kernel/msm - Gitiles

 /*
  * drivers/gpu/ion/ion_system_heap.c
  *
  * Copyright (C) 2011 Google, Inc.
  * Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
  * may be copied, distributed, and modified under those terms.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  */

 #include <linux/err.h>
 #include <linux/ion.h>
 #include <linux/mm.h>
 #include <linux/scatterlist.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/iommu.h>
 #include <linux/seq_file.h>
 #include <mach/iommu_domains.h>
 #include "ion_priv.h"
 #include <mach/memory.h>
 #include <asm/cacheflush.h>
 #include <linux/msm_ion.h>

 static atomic_t system_heap_allocated;
 static atomic_t system_contig_heap_allocated;
 static unsigned int system_heap_has_outer_cache;
 static unsigned int system_heap_contig_has_outer_cache;

 static int ion_system_heap_allocate(struct ion_heap *heap,
 				     struct ion_buffer *buffer,
 				     unsigned long size, unsigned long align,
 				     unsigned long flags)
 {
 	struct sg_table *table;
 	struct scatterlist *sg;
 	int i, j;
 	int npages = PAGE_ALIGN(size) / PAGE_SIZE;

 	table = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
 	if (!table)
 		return -ENOMEM;
 	i = sg_alloc_table(table, npages, GFP_KERNEL);
 	if (i)
 		goto err0;
 	for_each_sg(table->sgl, sg, table->nents, i) {
 		struct page *page;
 		page = alloc_page(GFP_KERNEL|__GFP_ZERO);
 		if (!page)
 			goto err1;
 		sg_set_page(sg, page, PAGE_SIZE, 0);
 	}
 	buffer->priv_virt = table;
 	atomic_add(size, &system_heap_allocated);
 	return 0;
 err1:
 	for_each_sg(table->sgl, sg, i, j)
 		__free_page(sg_page(sg));
 	sg_free_table(table);
 err0:
 	kfree(table);
 	return -ENOMEM;
 }

 void ion_system_heap_free(struct ion_buffer *buffer)
 {
 	int i;
 	struct scatterlist *sg;
 	struct sg_table *table = buffer->priv_virt;

 	for_each_sg(table->sgl, sg, table->nents, i)
 		__free_page(sg_page(sg));
 	if (buffer->sg_table)
 		sg_free_table(buffer->sg_table);
 	kfree(buffer->sg_table);
 	atomic_sub(buffer->size, &system_heap_allocated);
 }

 struct sg_table *ion_system_heap_map_dma(struct ion_heap *heap,
 					 struct ion_buffer *buffer)
 {
 	return buffer->priv_virt;
 }

 void ion_system_heap_unmap_dma(struct ion_heap *heap,
 			       struct ion_buffer *buffer)
 {
 	return;
 }

 void *ion_system_heap_map_kernel(struct ion_heap *heap,
 				 struct ion_buffer *buffer)
 {
 	if (!ION_IS_CACHED(buffer->flags)) {
 		pr_err("%s: cannot map system heap uncached\n", __func__);
 		return ERR_PTR(-EINVAL);
 	} else {
 		struct scatterlist *sg;
 		int i;
 		void *vaddr;
 		struct sg_table *table = buffer->priv_virt;
 		struct page **pages = kmalloc(
 					sizeof(struct page *) * table->nents,
 					GFP_KERNEL);

 		for_each_sg(table->sgl, sg, table->nents, i)
 			pages[i] = sg_page(sg);
 		vaddr = vmap(pages, table->nents, VM_MAP, PAGE_KERNEL);
 		kfree(pages);

 		return vaddr;
 	}
 }

 void ion_system_heap_unmap_kernel(struct ion_heap *heap,
 				  struct ion_buffer *buffer)
 {
 	vunmap(buffer->vaddr);
 }

 void ion_system_heap_unmap_iommu(struct ion_iommu_map *data)
 {
 	unsigned int domain_num;
 	unsigned int partition_num;
 	struct iommu_domain *domain;

 	if (!msm_use_iommu())
 		return;

 	domain_num = iommu_map_domain(data);
 	partition_num = iommu_map_partition(data);

 	domain = msm_get_iommu_domain(domain_num);

 	if (!domain) {
 		WARN(1, "Could not get domain %d. Corruption?\n", domain_num);
 		return;
 	}

 	iommu_unmap_range(domain, data->iova_addr, data->mapped_size);
 	msm_free_iova_address(data->iova_addr, domain_num, partition_num,
 				data->mapped_size);

 	return;
 }

 int ion_system_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
 			     struct vm_area_struct *vma)
 {
 	if (!ION_IS_CACHED(buffer->flags)) {
 		pr_err("%s: cannot map system heap uncached\n", __func__);
 		return -EINVAL;
 	} else {
 		struct sg_table *table = buffer->priv_virt;
 		unsigned long addr = vma->vm_start;
 		unsigned long offset = vma->vm_pgoff;
 		struct scatterlist *sg;
 		int i;

 		for_each_sg(table->sgl, sg, table->nents, i) {
 			if (offset) {
 				offset--;
 				continue;
 			}
 			vm_insert_page(vma, addr, sg_page(sg));
 			addr += PAGE_SIZE;
 		}
 		return 0;
 	}
 }

 int ion_system_heap_cache_ops(struct ion_heap *heap, struct ion_buffer *buffer,
 			void *vaddr, unsigned int offset, unsigned int length,
 			unsigned int cmd)
 {
 	void (*outer_cache_op)(phys_addr_t, phys_addr_t);

 	switch (cmd) {
 	case ION_IOC_CLEAN_CACHES:
 		dmac_clean_range(vaddr, vaddr + length);
 		outer_cache_op = outer_clean_range;
 		break;
 	case ION_IOC_INV_CACHES:
 		dmac_inv_range(vaddr, vaddr + length);
 		outer_cache_op = outer_inv_range;
 		break;
 	case ION_IOC_CLEAN_INV_CACHES:
 		dmac_flush_range(vaddr, vaddr + length);
 		outer_cache_op = outer_flush_range;
 		break;
 	default:
 		return -EINVAL;
 	}

 	if (system_heap_has_outer_cache) {
 		unsigned long pstart;
 		struct sg_table *table = buffer->priv_virt;
 		struct scatterlist *sg;
 		int i;
 		for_each_sg(table->sgl, sg, table->nents, i) {
 			struct page *page = sg_page(sg);
 			pstart = page_to_phys(page);
 			/*
 			 * If page -> phys is returning NULL, something
 			 * has really gone wrong...
 			 */
 			if (!pstart) {
 				WARN(1, "Could not translate virtual address to physical address\n");
 				return -EINVAL;
 			}
 			outer_cache_op(pstart, pstart + PAGE_SIZE);
 		}
 	}
 	return 0;
 }

 static int ion_system_print_debug(struct ion_heap *heap, struct seq_file *s,
 				  const struct rb_root *unused)
 {
 	seq_printf(s, "total bytes currently allocated: %lx\n",
 			(unsigned long) atomic_read(&system_heap_allocated));

 	return 0;
 }

 int ion_system_heap_map_iommu(struct ion_buffer *buffer,
 				struct ion_iommu_map *data,
 				unsigned int domain_num,
 				unsigned int partition_num,
 				unsigned long align,
 				unsigned long iova_length,
 				unsigned long flags)
 {
 	int ret = 0;
 	struct iommu_domain *domain;
 	unsigned long extra;
 	unsigned long extra_iova_addr;
 	struct sg_table *table = buffer->priv_virt;
 	int prot = IOMMU_WRITE | IOMMU_READ;
 	prot |= ION_IS_CACHED(flags) ? IOMMU_CACHE : 0;

 	if (!ION_IS_CACHED(flags))
 		return -EINVAL;

 	if (!msm_use_iommu())
 		return -EINVAL;

 	data->mapped_size = iova_length;
 	extra = iova_length - buffer->size;

 	ret = msm_allocate_iova_address(domain_num, partition_num,
 						data->mapped_size, align,
 						&data->iova_addr);

 	if (ret)
 		goto out;

 	domain = msm_get_iommu_domain(domain_num);

 	if (!domain) {
 		ret = -ENOMEM;
 		goto out1;
 	}

 	ret = iommu_map_range(domain, data->iova_addr, table->sgl,
 			      buffer->size, prot);

 	if (ret) {
 		pr_err("%s: could not map %lx in domain %p\n",
 			__func__, data->iova_addr, domain);
 		goto out1;
 	}

 	extra_iova_addr = data->iova_addr + buffer->size;
 	if (extra) {
 		ret = msm_iommu_map_extra(domain, extra_iova_addr, extra, SZ_4K,
 					  prot);
 		if (ret)
 			goto out2;
 	}
 	return ret;

 out2:
 	iommu_unmap_range(domain, data->iova_addr, buffer->size);
 out1:
 	msm_free_iova_address(data->iova_addr, domain_num, partition_num,
 				data->mapped_size);
 out:
 	return ret;
 }

 static struct ion_heap_ops vmalloc_ops = {
 	.allocate = ion_system_heap_allocate,
 	.free = ion_system_heap_free,
 	.map_dma = ion_system_heap_map_dma,
 	.unmap_dma = ion_system_heap_unmap_dma,
 	.map_kernel = ion_system_heap_map_kernel,
 	.unmap_kernel = ion_system_heap_unmap_kernel,
 	.map_user = ion_system_heap_map_user,
 	.cache_op = ion_system_heap_cache_ops,
 	.print_debug = ion_system_print_debug,
 	.map_iommu = ion_system_heap_map_iommu,
 	.unmap_iommu = ion_system_heap_unmap_iommu,
 };

 struct ion_heap *ion_system_heap_create(struct ion_platform_heap *pheap)
 {
 	struct ion_heap *heap;

 	heap = kzalloc(sizeof(struct ion_heap), GFP_KERNEL);
 	if (!heap)
 		return ERR_PTR(-ENOMEM);
 	heap->ops = &vmalloc_ops;
 	heap->type = ION_HEAP_TYPE_SYSTEM;
 	system_heap_has_outer_cache = pheap->has_outer_cache;
 	return heap;
 }

 void ion_system_heap_destroy(struct ion_heap *heap)
 {
 	kfree(heap);
 }

 static int ion_system_contig_heap_allocate(struct ion_heap *heap,
 					   struct ion_buffer *buffer,
 					   unsigned long len,
 					   unsigned long align,
 					   unsigned long flags)
 {
 	buffer->priv_virt = kzalloc(len, GFP_KERNEL);
 	if (!buffer->priv_virt)
 		return -ENOMEM;
 	atomic_add(len, &system_contig_heap_allocated);
 	return 0;
 }

 void ion_system_contig_heap_free(struct ion_buffer *buffer)
 {
 	kfree(buffer->priv_virt);
 	atomic_sub(buffer->size, &system_contig_heap_allocated);
 }

 static int ion_system_contig_heap_phys(struct ion_heap *heap,
 				       struct ion_buffer *buffer,
 				       ion_phys_addr_t *addr, size_t *len)
 {
 	*addr = virt_to_phys(buffer->priv_virt);
 	*len = buffer->size;
 	return 0;
 }

 struct sg_table *ion_system_contig_heap_map_dma(struct ion_heap *heap,
 						   struct ion_buffer *buffer)
 {
 	struct sg_table *table;
 	int ret;

 	table = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
 	if (!table)
 		return ERR_PTR(-ENOMEM);
 	ret = sg_alloc_table(table, 1, GFP_KERNEL);
 	if (ret) {
 		kfree(table);
 		return ERR_PTR(ret);
 	}
 	sg_set_page(table->sgl, virt_to_page(buffer->priv_virt), buffer->size,
 		    0);
 	return table;
 }

 int ion_system_contig_heap_map_user(struct ion_heap *heap,
 				    struct ion_buffer *buffer,
 				    struct vm_area_struct *vma)
 {
 	unsigned long pfn = __phys_to_pfn(virt_to_phys(buffer->priv_virt));

 	if (ION_IS_CACHED(buffer->flags))
 		return remap_pfn_range(vma, vma->vm_start, pfn + vma->vm_pgoff,
 			       vma->vm_end - vma->vm_start,
 			       vma->vm_page_prot);
 	else {
 		pr_err("%s: cannot map system heap uncached\n", __func__);
 		return -EINVAL;
 	}
 }

 int ion_system_contig_heap_cache_ops(struct ion_heap *heap,
 			struct ion_buffer *buffer, void *vaddr,
 			unsigned int offset, unsigned int length,
 			unsigned int cmd)
 {
 	void (*outer_cache_op)(phys_addr_t, phys_addr_t);

 	switch (cmd) {
 	case ION_IOC_CLEAN_CACHES:
 		dmac_clean_range(vaddr, vaddr + length);
 		outer_cache_op = outer_clean_range;
 		break;
 	case ION_IOC_INV_CACHES:
 		dmac_inv_range(vaddr, vaddr + length);
 		outer_cache_op = outer_inv_range;
 		break;
 	case ION_IOC_CLEAN_INV_CACHES:
 		dmac_flush_range(vaddr, vaddr + length);
 		outer_cache_op = outer_flush_range;
 		break;
 	default:
 		return -EINVAL;
 	}

 	if (system_heap_contig_has_outer_cache) {
 		unsigned long pstart;

 		pstart = virt_to_phys(buffer->priv_virt) + offset;
 		if (!pstart) {
 			WARN(1, "Could not do virt to phys translation on %p\n",
 				buffer->priv_virt);
 			return -EINVAL;
 		}

 		outer_cache_op(pstart, pstart + PAGE_SIZE);
 	}

 	return 0;
 }

 static int ion_system_contig_print_debug(struct ion_heap *heap,
 					 struct seq_file *s,
 					 const struct rb_root *unused)
 {
 	seq_printf(s, "total bytes currently allocated: %lx\n",
 		(unsigned long) atomic_read(&system_contig_heap_allocated));

 	return 0;
 }

 int ion_system_contig_heap_map_iommu(struct ion_buffer *buffer,
 				struct ion_iommu_map *data,
 				unsigned int domain_num,
 				unsigned int partition_num,
 				unsigned long align,
 				unsigned long iova_length,
 				unsigned long flags)
 {
 	int ret = 0;
 	struct iommu_domain *domain;
 	unsigned long extra;
 	struct scatterlist *sglist = 0;
 	struct page *page = 0;
 	int prot = IOMMU_WRITE | IOMMU_READ;
 	prot |= ION_IS_CACHED(flags) ? IOMMU_CACHE : 0;

 	if (!ION_IS_CACHED(flags))
 		return -EINVAL;

 	if (!msm_use_iommu()) {
 		data->iova_addr = virt_to_phys(buffer->vaddr);
 		return 0;
 	}

 	data->mapped_size = iova_length;
 	extra = iova_length - buffer->size;

 	ret = msm_allocate_iova_address(domain_num, partition_num,
 						data->mapped_size, align,
 						&data->iova_addr);

 	if (ret)
 		goto out;

 	domain = msm_get_iommu_domain(domain_num);

 	if (!domain) {
 		ret = -ENOMEM;
 		goto out1;
 	}
 	page = virt_to_page(buffer->vaddr);

 	sglist = vmalloc(sizeof(*sglist));
 	if (!sglist)
 		goto out1;

 	sg_init_table(sglist, 1);
 	sg_set_page(sglist, page, buffer->size, 0);

 	ret = iommu_map_range(domain, data->iova_addr, sglist,
 			      buffer->size, prot);
 	if (ret) {
 		pr_err("%s: could not map %lx in domain %p\n",
 			__func__, data->iova_addr, domain);
 		goto out1;
 	}

 	if (extra) {
 		unsigned long extra_iova_addr = data->iova_addr + buffer->size;
 		ret = msm_iommu_map_extra(domain, extra_iova_addr, extra, SZ_4K,
 					  prot);
 		if (ret)
 			goto out2;
 	}
 	vfree(sglist);
 	return ret;
 out2:
 	iommu_unmap_range(domain, data->iova_addr, buffer->size);

 out1:
 	vfree(sglist);
 	msm_free_iova_address(data->iova_addr, domain_num, partition_num,
 						data->mapped_size);
 out:
 	return ret;
 }

 static struct ion_heap_ops kmalloc_ops = {
 	.allocate = ion_system_contig_heap_allocate,
 	.free = ion_system_contig_heap_free,
 	.phys = ion_system_contig_heap_phys,
 	.map_dma = ion_system_contig_heap_map_dma,
 	.unmap_dma = ion_system_heap_unmap_dma,
 	.map_kernel = ion_system_heap_map_kernel,
 	.unmap_kernel = ion_system_heap_unmap_kernel,
 	.map_user = ion_system_contig_heap_map_user,
 	.cache_op = ion_system_contig_heap_cache_ops,
 	.print_debug = ion_system_contig_print_debug,
 	.map_iommu = ion_system_contig_heap_map_iommu,
 	.unmap_iommu = ion_system_heap_unmap_iommu,
 };

 struct ion_heap *ion_system_contig_heap_create(struct ion_platform_heap *pheap)
 {
 	struct ion_heap *heap;

 	heap = kzalloc(sizeof(struct ion_heap), GFP_KERNEL);
 	if (!heap)
 		return ERR_PTR(-ENOMEM);
 	heap->ops = &kmalloc_ops;
 	heap->type = ION_HEAP_TYPE_SYSTEM_CONTIG;
 	system_heap_contig_has_outer_cache = pheap->has_outer_cache;
 	return heap;
 }

 void ion_system_contig_heap_destroy(struct ion_heap *heap)
 {
 	kfree(heap);
 }
	/*
	* drivers/gpu/ion/ion_system_heap.c
	*
	* Copyright (C) 2011 Google, Inc.
	* Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
	*
	* This software is licensed under the terms of the GNU General Public
	* License version 2, as published by the Free Software Foundation, and
	* may be copied, distributed, and modified under those terms.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	*/

	#include <linux/err.h>
	#include <linux/ion.h>
	#include <linux/mm.h>
	#include <linux/scatterlist.h>
	#include <linux/slab.h>
	#include <linux/vmalloc.h>
	#include <linux/iommu.h>
	#include <linux/seq_file.h>
	#include <mach/iommu_domains.h>
	#include "ion_priv.h"
	#include <mach/memory.h>
	#include <asm/cacheflush.h>
	#include <linux/msm_ion.h>

	static atomic_t system_heap_allocated;
	static atomic_t system_contig_heap_allocated;
	static unsigned int system_heap_has_outer_cache;
	static unsigned int system_heap_contig_has_outer_cache;

	static int ion_system_heap_allocate(struct ion_heap *heap,
	struct ion_buffer *buffer,
	unsigned long size, unsigned long align,
	unsigned long flags)
	{
	struct sg_table *table;
	struct scatterlist *sg;
	int i, j;
	int npages = PAGE_ALIGN(size) / PAGE_SIZE;

	table = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
	if (!table)
	return -ENOMEM;
	i = sg_alloc_table(table, npages, GFP_KERNEL);
	if (i)
	goto err0;
	for_each_sg(table->sgl, sg, table->nents, i) {
	struct page *page;
	page = alloc_page(GFP_KERNEL\|__GFP_ZERO);
	if (!page)
	goto err1;
	sg_set_page(sg, page, PAGE_SIZE, 0);
	}
	buffer->priv_virt = table;
	atomic_add(size, &system_heap_allocated);
	return 0;
	err1:
	for_each_sg(table->sgl, sg, i, j)
	__free_page(sg_page(sg));
	sg_free_table(table);
	err0:
	kfree(table);
	return -ENOMEM;
	}

	void ion_system_heap_free(struct ion_buffer *buffer)
	{
	int i;
	struct scatterlist *sg;
	struct sg_table *table = buffer->priv_virt;

	for_each_sg(table->sgl, sg, table->nents, i)
	__free_page(sg_page(sg));
	if (buffer->sg_table)
	sg_free_table(buffer->sg_table);
	kfree(buffer->sg_table);
	atomic_sub(buffer->size, &system_heap_allocated);
	}

	struct sg_table ion_system_heap_map_dma(struct ion_heap heap,
	struct ion_buffer *buffer)
	{
	return buffer->priv_virt;
	}

	void ion_system_heap_unmap_dma(struct ion_heap *heap,
	struct ion_buffer *buffer)
	{
	return;
	}

	void ion_system_heap_map_kernel(struct ion_heap heap,
	struct ion_buffer *buffer)
	{
	if (!ION_IS_CACHED(buffer->flags)) {
	pr_err("%s: cannot map system heap uncached\n", __func__);
	return ERR_PTR(-EINVAL);
	} else {
	struct scatterlist *sg;
	int i;
	void *vaddr;
	struct sg_table *table = buffer->priv_virt;
	struct page **pages = kmalloc(
	sizeof(struct page ) table->nents,
	GFP_KERNEL);

	for_each_sg(table->sgl, sg, table->nents, i)
	pages[i] = sg_page(sg);
	vaddr = vmap(pages, table->nents, VM_MAP, PAGE_KERNEL);
	kfree(pages);

	return vaddr;
	}
	}

	void ion_system_heap_unmap_kernel(struct ion_heap *heap,
	struct ion_buffer *buffer)
	{
	vunmap(buffer->vaddr);
	}

	void ion_system_heap_unmap_iommu(struct ion_iommu_map *data)
	{
	unsigned int domain_num;
	unsigned int partition_num;
	struct iommu_domain *domain;

	if (!msm_use_iommu())
	return;

	domain_num = iommu_map_domain(data);
	partition_num = iommu_map_partition(data);

	domain = msm_get_iommu_domain(domain_num);

	if (!domain) {
	WARN(1, "Could not get domain %d. Corruption?\n", domain_num);
	return;
	}

	iommu_unmap_range(domain, data->iova_addr, data->mapped_size);
	msm_free_iova_address(data->iova_addr, domain_num, partition_num,
	data->mapped_size);

	return;
	}

	int ion_system_heap_map_user(struct ion_heap heap, struct ion_buffer buffer,
	struct vm_area_struct *vma)
	{
	if (!ION_IS_CACHED(buffer->flags)) {
	pr_err("%s: cannot map system heap uncached\n", __func__);
	return -EINVAL;
	} else {
	struct sg_table *table = buffer->priv_virt;
	unsigned long addr = vma->vm_start;
	unsigned long offset = vma->vm_pgoff;
	struct scatterlist *sg;
	int i;

	for_each_sg(table->sgl, sg, table->nents, i) {
	if (offset) {
	offset--;
	continue;
	}
	vm_insert_page(vma, addr, sg_page(sg));
	addr += PAGE_SIZE;
	}
	return 0;
	}
	}

	int ion_system_heap_cache_ops(struct ion_heap heap, struct ion_buffer buffer,
	void *vaddr, unsigned int offset, unsigned int length,
	unsigned int cmd)
	{
	void (*outer_cache_op)(phys_addr_t, phys_addr_t);

	switch (cmd) {
	case ION_IOC_CLEAN_CACHES:
	dmac_clean_range(vaddr, vaddr + length);
	outer_cache_op = outer_clean_range;
	break;
	case ION_IOC_INV_CACHES:
	dmac_inv_range(vaddr, vaddr + length);
	outer_cache_op = outer_inv_range;
	break;
	case ION_IOC_CLEAN_INV_CACHES:
	dmac_flush_range(vaddr, vaddr + length);
	outer_cache_op = outer_flush_range;
	break;
	default:
	return -EINVAL;
	}

	if (system_heap_has_outer_cache) {
	unsigned long pstart;
	struct sg_table *table = buffer->priv_virt;
	struct scatterlist *sg;
	int i;
	for_each_sg(table->sgl, sg, table->nents, i) {
	struct page *page = sg_page(sg);
	pstart = page_to_phys(page);
	/*
	* If page -> phys is returning NULL, something
	* has really gone wrong...
	*/
	if (!pstart) {
	WARN(1, "Could not translate virtual address to physical address\n");
	return -EINVAL;
	}
	outer_cache_op(pstart, pstart + PAGE_SIZE);
	}
	}
	return 0;
	}

	static int ion_system_print_debug(struct ion_heap heap, struct seq_file s,
	const struct rb_root *unused)
	{
	seq_printf(s, "total bytes currently allocated: %lx\n",
	(unsigned long) atomic_read(&system_heap_allocated));

	return 0;
	}

	int ion_system_heap_map_iommu(struct ion_buffer *buffer,
	struct ion_iommu_map *data,
	unsigned int domain_num,
	unsigned int partition_num,
	unsigned long align,
	unsigned long iova_length,
	unsigned long flags)
	{
	int ret = 0;
	struct iommu_domain *domain;
	unsigned long extra;
	unsigned long extra_iova_addr;
	struct sg_table *table = buffer->priv_virt;
	int prot = IOMMU_WRITE \| IOMMU_READ;
	prot \|= ION_IS_CACHED(flags) ? IOMMU_CACHE : 0;

	if (!ION_IS_CACHED(flags))
	return -EINVAL;

	if (!msm_use_iommu())
	return -EINVAL;

	data->mapped_size = iova_length;
	extra = iova_length - buffer->size;

	ret = msm_allocate_iova_address(domain_num, partition_num,
	data->mapped_size, align,
	&data->iova_addr);

	if (ret)
	goto out;

	domain = msm_get_iommu_domain(domain_num);

	if (!domain) {
	ret = -ENOMEM;
	goto out1;
	}

	ret = iommu_map_range(domain, data->iova_addr, table->sgl,
	buffer->size, prot);

	if (ret) {
	pr_err("%s: could not map %lx in domain %p\n",
	__func__, data->iova_addr, domain);
	goto out1;
	}

	extra_iova_addr = data->iova_addr + buffer->size;
	if (extra) {
	ret = msm_iommu_map_extra(domain, extra_iova_addr, extra, SZ_4K,
	prot);
	if (ret)
	goto out2;
	}
	return ret;

	out2:
	iommu_unmap_range(domain, data->iova_addr, buffer->size);
	out1:
	msm_free_iova_address(data->iova_addr, domain_num, partition_num,
	data->mapped_size);
	out:
	return ret;
	}

	static struct ion_heap_ops vmalloc_ops = {
	.allocate = ion_system_heap_allocate,
	.free = ion_system_heap_free,
	.map_dma = ion_system_heap_map_dma,
	.unmap_dma = ion_system_heap_unmap_dma,
	.map_kernel = ion_system_heap_map_kernel,
	.unmap_kernel = ion_system_heap_unmap_kernel,
	.map_user = ion_system_heap_map_user,
	.cache_op = ion_system_heap_cache_ops,
	.print_debug = ion_system_print_debug,
	.map_iommu = ion_system_heap_map_iommu,
	.unmap_iommu = ion_system_heap_unmap_iommu,
	};

	struct ion_heap ion_system_heap_create(struct ion_platform_heap pheap)
	{
	struct ion_heap *heap;

	heap = kzalloc(sizeof(struct ion_heap), GFP_KERNEL);
	if (!heap)
	return ERR_PTR(-ENOMEM);
	heap->ops = &vmalloc_ops;
	heap->type = ION_HEAP_TYPE_SYSTEM;
	system_heap_has_outer_cache = pheap->has_outer_cache;
	return heap;
	}

	void ion_system_heap_destroy(struct ion_heap *heap)
	{
	kfree(heap);
	}

	static int ion_system_contig_heap_allocate(struct ion_heap *heap,
	struct ion_buffer *buffer,
	unsigned long len,
	unsigned long align,
	unsigned long flags)
	{
	buffer->priv_virt = kzalloc(len, GFP_KERNEL);
	if (!buffer->priv_virt)
	return -ENOMEM;
	atomic_add(len, &system_contig_heap_allocated);
	return 0;
	}

	void ion_system_contig_heap_free(struct ion_buffer *buffer)
	{
	kfree(buffer->priv_virt);
	atomic_sub(buffer->size, &system_contig_heap_allocated);
	}

	static int ion_system_contig_heap_phys(struct ion_heap *heap,
	struct ion_buffer *buffer,
	ion_phys_addr_t addr, size_t len)
	{
	*addr = virt_to_phys(buffer->priv_virt);
	*len = buffer->size;
	return 0;
	}

	struct sg_table ion_system_contig_heap_map_dma(struct ion_heap heap,
	struct ion_buffer *buffer)
	{
	struct sg_table *table;
	int ret;

	table = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
	if (!table)
	return ERR_PTR(-ENOMEM);
	ret = sg_alloc_table(table, 1, GFP_KERNEL);
	if (ret) {
	kfree(table);
	return ERR_PTR(ret);
	}
	sg_set_page(table->sgl, virt_to_page(buffer->priv_virt), buffer->size,
	0);
	return table;
	}

	int ion_system_contig_heap_map_user(struct ion_heap *heap,
	struct ion_buffer *buffer,
	struct vm_area_struct *vma)
	{
	unsigned long pfn = __phys_to_pfn(virt_to_phys(buffer->priv_virt));

	if (ION_IS_CACHED(buffer->flags))
	return remap_pfn_range(vma, vma->vm_start, pfn + vma->vm_pgoff,
	vma->vm_end - vma->vm_start,
	vma->vm_page_prot);
	else {
	pr_err("%s: cannot map system heap uncached\n", __func__);
	return -EINVAL;
	}
	}

	int ion_system_contig_heap_cache_ops(struct ion_heap *heap,
	struct ion_buffer buffer, void vaddr,
	unsigned int offset, unsigned int length,
	unsigned int cmd)
	{
	void (*outer_cache_op)(phys_addr_t, phys_addr_t);

	switch (cmd) {
	case ION_IOC_CLEAN_CACHES:
	dmac_clean_range(vaddr, vaddr + length);
	outer_cache_op = outer_clean_range;
	break;
	case ION_IOC_INV_CACHES:
	dmac_inv_range(vaddr, vaddr + length);
	outer_cache_op = outer_inv_range;
	break;
	case ION_IOC_CLEAN_INV_CACHES:
	dmac_flush_range(vaddr, vaddr + length);
	outer_cache_op = outer_flush_range;
	break;
	default:
	return -EINVAL;
	}

	if (system_heap_contig_has_outer_cache) {
	unsigned long pstart;

	pstart = virt_to_phys(buffer->priv_virt) + offset;
	if (!pstart) {
	WARN(1, "Could not do virt to phys translation on %p\n",
	buffer->priv_virt);
	return -EINVAL;
	}

	outer_cache_op(pstart, pstart + PAGE_SIZE);
	}

	return 0;
	}

	static int ion_system_contig_print_debug(struct ion_heap *heap,
	struct seq_file *s,
	const struct rb_root *unused)
	{
	seq_printf(s, "total bytes currently allocated: %lx\n",
	(unsigned long) atomic_read(&system_contig_heap_allocated));

	return 0;
	}

	int ion_system_contig_heap_map_iommu(struct ion_buffer *buffer,
	struct ion_iommu_map *data,
	unsigned int domain_num,
	unsigned int partition_num,
	unsigned long align,
	unsigned long iova_length,
	unsigned long flags)
	{
	int ret = 0;
	struct iommu_domain *domain;
	unsigned long extra;
	struct scatterlist *sglist = 0;
	struct page *page = 0;
	int prot = IOMMU_WRITE \| IOMMU_READ;
	prot \|= ION_IS_CACHED(flags) ? IOMMU_CACHE : 0;

	if (!ION_IS_CACHED(flags))
	return -EINVAL;

	if (!msm_use_iommu()) {
	data->iova_addr = virt_to_phys(buffer->vaddr);
	return 0;
	}

	data->mapped_size = iova_length;
	extra = iova_length - buffer->size;

	ret = msm_allocate_iova_address(domain_num, partition_num,
	data->mapped_size, align,
	&data->iova_addr);

	if (ret)
	goto out;

	domain = msm_get_iommu_domain(domain_num);

	if (!domain) {
	ret = -ENOMEM;
	goto out1;
	}
	page = virt_to_page(buffer->vaddr);

	sglist = vmalloc(sizeof(*sglist));
	if (!sglist)
	goto out1;

	sg_init_table(sglist, 1);
	sg_set_page(sglist, page, buffer->size, 0);

	ret = iommu_map_range(domain, data->iova_addr, sglist,
	buffer->size, prot);
	if (ret) {
	pr_err("%s: could not map %lx in domain %p\n",
	__func__, data->iova_addr, domain);
	goto out1;
	}

	if (extra) {
	unsigned long extra_iova_addr = data->iova_addr + buffer->size;
	ret = msm_iommu_map_extra(domain, extra_iova_addr, extra, SZ_4K,
	prot);
	if (ret)
	goto out2;
	}
	vfree(sglist);
	return ret;
	out2:
	iommu_unmap_range(domain, data->iova_addr, buffer->size);

	out1:
	vfree(sglist);
	msm_free_iova_address(data->iova_addr, domain_num, partition_num,
	data->mapped_size);
	out:
	return ret;
	}

	static struct ion_heap_ops kmalloc_ops = {
	.allocate = ion_system_contig_heap_allocate,
	.free = ion_system_contig_heap_free,
	.phys = ion_system_contig_heap_phys,
	.map_dma = ion_system_contig_heap_map_dma,
	.unmap_dma = ion_system_heap_unmap_dma,
	.map_kernel = ion_system_heap_map_kernel,
	.unmap_kernel = ion_system_heap_unmap_kernel,
	.map_user = ion_system_contig_heap_map_user,
	.cache_op = ion_system_contig_heap_cache_ops,
	.print_debug = ion_system_contig_print_debug,
	.map_iommu = ion_system_contig_heap_map_iommu,
	.unmap_iommu = ion_system_heap_unmap_iommu,
	};

	struct ion_heap ion_system_contig_heap_create(struct ion_platform_heap pheap)
	{
	struct ion_heap *heap;

	heap = kzalloc(sizeof(struct ion_heap), GFP_KERNEL);
	if (!heap)
	return ERR_PTR(-ENOMEM);
	heap->ops = &kmalloc_ops;
	heap->type = ION_HEAP_TYPE_SYSTEM_CONTIG;
	system_heap_contig_has_outer_cache = pheap->has_outer_cache;
	return heap;
	}

	void ion_system_contig_heap_destroy(struct ion_heap *heap)
	{
	kfree(heap);
	}