drivers/gpu/ion/ion_carveout_heap.c - kernel/msm - Gitiles

 /*
  * drivers/gpu/ion/ion_carveout_heap.c
  *
  * Copyright (C) 2011 Google, Inc.
  * Copyright (c) 2011-2013, The Linux Foundation. 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/spinlock.h>

 #include <linux/err.h>
 #include <linux/genalloc.h>
 #include <linux/io.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 "ion_priv.h"

 #include <mach/iommu_domains.h>
 #include <asm/mach/map.h>
 #include <asm/cacheflush.h>
 #include <linux/msm_ion.h>

 struct ion_carveout_heap {
 	struct ion_heap heap;
 	struct gen_pool *pool;
 	ion_phys_addr_t base;
 	unsigned long allocated_bytes;
 	unsigned long total_size;
 	int (*request_region)(void *);
 	int (*release_region)(void *);
 	atomic_t map_count;
 	void *bus_id;
 	unsigned int has_outer_cache;
 };

 ion_phys_addr_t ion_carveout_allocate(struct ion_heap *heap,
 				      unsigned long size,
 				      unsigned long align)
 {
 	struct ion_carveout_heap *carveout_heap =
 		container_of(heap, struct ion_carveout_heap, heap);
 	unsigned long offset = gen_pool_alloc_aligned(carveout_heap->pool,
 							size, ilog2(align));

 	if (!offset) {
 		if ((carveout_heap->total_size -
 		      carveout_heap->allocated_bytes) >= size)
 			pr_debug("%s: heap %s has enough memory (%lx) but"
 				" the allocation of size %lx still failed."
 				" Memory is probably fragmented.",
 				__func__, heap->name,
 				carveout_heap->total_size -
 				carveout_heap->allocated_bytes, size);
 		return ION_CARVEOUT_ALLOCATE_FAIL;
 	}

 	carveout_heap->allocated_bytes += size;
 	return offset;
 }

 void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr,
 		       unsigned long size)
 {
 	struct ion_carveout_heap *carveout_heap =
 		container_of(heap, struct ion_carveout_heap, heap);

 	if (addr == ION_CARVEOUT_ALLOCATE_FAIL)
 		return;
 	gen_pool_free(carveout_heap->pool, addr, size);
 	carveout_heap->allocated_bytes -= size;
 }

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

 static int ion_carveout_heap_allocate(struct ion_heap *heap,
 				      struct ion_buffer *buffer,
 				      unsigned long size, unsigned long align,
 				      unsigned long flags)
 {
 	buffer->priv_phys = ion_carveout_allocate(heap, size, align);
 	return buffer->priv_phys == ION_CARVEOUT_ALLOCATE_FAIL ? -ENOMEM : 0;
 }

 static void ion_carveout_heap_free(struct ion_buffer *buffer)
 {
 	struct ion_heap *heap = buffer->heap;

 	ion_carveout_free(heap, buffer->priv_phys, buffer->size);
 	buffer->priv_phys = ION_CARVEOUT_ALLOCATE_FAIL;
 }

 struct sg_table *ion_carveout_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)
 		goto err0;

 	table->sgl->length = buffer->size;
 	table->sgl->offset = 0;
 	table->sgl->dma_address = buffer->priv_phys;

 	return table;

 err0:
 	kfree(table);
 	return ERR_PTR(ret);
 }

 void ion_carveout_heap_unmap_dma(struct ion_heap *heap,
 				 struct ion_buffer *buffer)
 {
 	if (buffer->sg_table)
 		sg_free_table(buffer->sg_table);
 	kfree(buffer->sg_table);
 	buffer->sg_table = 0;
 }

 static int ion_carveout_request_region(struct ion_carveout_heap *carveout_heap)
 {
 	int ret_value = 0;
 	if (atomic_inc_return(&carveout_heap->map_count) == 1) {
 		if (carveout_heap->request_region) {
 			ret_value = carveout_heap->request_region(
 						carveout_heap->bus_id);
 			if (ret_value) {
 				pr_err("Unable to request SMI region");
 				atomic_dec(&carveout_heap->map_count);
 			}
 		}
 	}
 	return ret_value;
 }

 static int ion_carveout_release_region(struct ion_carveout_heap *carveout_heap)
 {
 	int ret_value = 0;
 	if (atomic_dec_and_test(&carveout_heap->map_count)) {
 		if (carveout_heap->release_region) {
 			ret_value = carveout_heap->release_region(
 						carveout_heap->bus_id);
 			if (ret_value)
 				pr_err("Unable to release SMI region");
 		}
 	}
 	return ret_value;
 }

 void *ion_carveout_heap_map_kernel(struct ion_heap *heap,
 				   struct ion_buffer *buffer)
 {
 	struct ion_carveout_heap *carveout_heap =
 		container_of(heap, struct ion_carveout_heap, heap);
 	void *ret_value;

 	if (ion_carveout_request_region(carveout_heap))
 		return NULL;

 	if (ION_IS_CACHED(buffer->flags))
 		ret_value = ioremap_cached(buffer->priv_phys, buffer->size);
 	else
 		ret_value = ioremap(buffer->priv_phys, buffer->size);

 	if (!ret_value)
 		ion_carveout_release_region(carveout_heap);
 	return ret_value;
 }

 void ion_carveout_heap_unmap_kernel(struct ion_heap *heap,
 				    struct ion_buffer *buffer)
 {
 	struct ion_carveout_heap *carveout_heap =
 		container_of(heap, struct ion_carveout_heap, heap);

 	__arm_iounmap(buffer->vaddr);
 	buffer->vaddr = NULL;

 	ion_carveout_release_region(carveout_heap);
 	return;
 }

 int ion_carveout_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
 			       struct vm_area_struct *vma)
 {
 	struct ion_carveout_heap *carveout_heap =
 		container_of(heap, struct ion_carveout_heap, heap);
 	int ret_value = 0;

 	if (ion_carveout_request_region(carveout_heap))
 		return -EINVAL;

 	if (!ION_IS_CACHED(buffer->flags))
 		vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);

 	ret_value =  remap_pfn_range(vma, vma->vm_start,
 			__phys_to_pfn(buffer->priv_phys) + vma->vm_pgoff,
 			vma->vm_end - vma->vm_start,
 			vma->vm_page_prot);

 	if (ret_value)
 		ion_carveout_release_region(carveout_heap);
 	return ret_value;
 }

 void ion_carveout_heap_unmap_user(struct ion_heap *heap,
 				    struct ion_buffer *buffer)
 {
 	struct ion_carveout_heap *carveout_heap =
 		container_of(heap, struct ion_carveout_heap, heap);
 	ion_carveout_release_region(carveout_heap);
 }

 int ion_carveout_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);
 	struct ion_carveout_heap *carveout_heap =
 	     container_of(heap, struct  ion_carveout_heap, heap);

 	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 (carveout_heap->has_outer_cache) {
 		unsigned long pstart = buffer->priv_phys + offset;
 		outer_cache_op(pstart, pstart + length);
 	}
 	return 0;
 }

 static int ion_carveout_print_debug(struct ion_heap *heap, struct seq_file *s,
 				    const struct rb_root *mem_map)
 {
 	struct ion_carveout_heap *carveout_heap =
 		container_of(heap, struct ion_carveout_heap, heap);

 	seq_printf(s, "total bytes currently allocated: %lx\n",
 		carveout_heap->allocated_bytes);
 	seq_printf(s, "total heap size: %lx\n", carveout_heap->total_size);

 	if (mem_map) {
 		unsigned long base = carveout_heap->base;
 		unsigned long size = carveout_heap->total_size;
 		unsigned long end = base+size;
 		unsigned long last_end = base;
 		struct rb_node *n;

 		seq_printf(s, "\nMemory Map\n");
 		seq_printf(s, "%16.s %14.s %14.s %14.s\n",
 			   "client", "start address", "end address",
 			   "size (hex)");

 		for (n = rb_first(mem_map); n; n = rb_next(n)) {
 			struct mem_map_data *data =
 					rb_entry(n, struct mem_map_data, node);
 			const char *client_name = "(null)";

 			if (last_end < data->addr) {
 				phys_addr_t da;

 				da = data->addr-1;
 				seq_printf(s, "%16.s %14pa %14pa %14lu (%lx)\n",
 					   "FREE", &last_end, &da,
 					   data->addr-last_end,
 					   data->addr-last_end);
 			}

 			if (data->client_name)
 				client_name = data->client_name;

 			seq_printf(s, "%16.s %14pa %14pa %14lu (%lx)\n",
 				   client_name, &data->addr,
 				   &data->addr_end,
 				   data->size, data->size);
 			last_end = data->addr_end+1;
 		}
 		if (last_end < end) {
 			seq_printf(s, "%16.s %14lx %14lx %14lu (%lx)\n", "FREE",
 				last_end, end-1, end-last_end, end-last_end);
 		}
 	}
 	return 0;
 }

 int ion_carveout_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)
 {
 	struct iommu_domain *domain;
 	int ret = 0;
 	unsigned long extra;
 	struct scatterlist *sglist = 0;
 	int prot = IOMMU_WRITE | IOMMU_READ;
 	prot |= ION_IS_CACHED(flags) ? IOMMU_CACHE : 0;

 	data->mapped_size = iova_length;

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

 	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;
 	}

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

 	sg_init_table(sglist, 1);
 	sglist->length = buffer->size;
 	sglist->offset = 0;
 	sglist->dma_address = buffer->priv_phys;

 	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;
 		unsigned long phys_addr = sg_phys(sglist);
 		ret = msm_iommu_map_extra(domain, extra_iova_addr, phys_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;
 }

 void ion_carveout_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;
 }

 static struct ion_heap_ops carveout_heap_ops = {
 	.allocate = ion_carveout_heap_allocate,
 	.free = ion_carveout_heap_free,
 	.phys = ion_carveout_heap_phys,
 	.map_user = ion_carveout_heap_map_user,
 	.map_kernel = ion_carveout_heap_map_kernel,
 	.unmap_user = ion_carveout_heap_unmap_user,
 	.unmap_kernel = ion_carveout_heap_unmap_kernel,
 	.map_dma = ion_carveout_heap_map_dma,
 	.unmap_dma = ion_carveout_heap_unmap_dma,
 	.cache_op = ion_carveout_cache_ops,
 	.print_debug = ion_carveout_print_debug,
 	.map_iommu = ion_carveout_heap_map_iommu,
 	.unmap_iommu = ion_carveout_heap_unmap_iommu,
 };

 struct ion_heap *ion_carveout_heap_create(struct ion_platform_heap *heap_data)
 {
 	struct ion_carveout_heap *carveout_heap;
 	int ret;

 	carveout_heap = kzalloc(sizeof(struct ion_carveout_heap), GFP_KERNEL);
 	if (!carveout_heap)
 		return ERR_PTR(-ENOMEM);

 	carveout_heap->pool = gen_pool_create(12, -1);
 	if (!carveout_heap->pool) {
 		kfree(carveout_heap);
 		return ERR_PTR(-ENOMEM);
 	}
 	carveout_heap->base = heap_data->base;
 	ret = gen_pool_add(carveout_heap->pool, carveout_heap->base,
 			heap_data->size, -1);
 	if (ret < 0) {
 		gen_pool_destroy(carveout_heap->pool);
 		kfree(carveout_heap);
 		return ERR_PTR(-EINVAL);
 	}
 	carveout_heap->heap.ops = &carveout_heap_ops;
 	carveout_heap->heap.type = ION_HEAP_TYPE_CARVEOUT;
 	carveout_heap->allocated_bytes = 0;
 	carveout_heap->total_size = heap_data->size;
 	carveout_heap->has_outer_cache = heap_data->has_outer_cache;

 	if (heap_data->extra_data) {
 		struct ion_co_heap_pdata *extra_data =
 				heap_data->extra_data;

 		if (extra_data->setup_region)
 			carveout_heap->bus_id = extra_data->setup_region();
 		if (extra_data->request_region)
 			carveout_heap->request_region =
 					extra_data->request_region;
 		if (extra_data->release_region)
 			carveout_heap->release_region =
 					extra_data->release_region;
 	}
 	return &carveout_heap->heap;
 }

 void ion_carveout_heap_destroy(struct ion_heap *heap)
 {
 	struct ion_carveout_heap *carveout_heap =
 	     container_of(heap, struct  ion_carveout_heap, heap);

 	gen_pool_destroy(carveout_heap->pool);
 	kfree(carveout_heap);
 	carveout_heap = NULL;
 }
	/*
	* drivers/gpu/ion/ion_carveout_heap.c
	*
	* Copyright (C) 2011 Google, Inc.
	* Copyright (c) 2011-2013, The Linux Foundation. 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/spinlock.h>

	#include <linux/err.h>
	#include <linux/genalloc.h>
	#include <linux/io.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 "ion_priv.h"

	#include <mach/iommu_domains.h>
	#include <asm/mach/map.h>
	#include <asm/cacheflush.h>
	#include <linux/msm_ion.h>

	struct ion_carveout_heap {
	struct ion_heap heap;
	struct gen_pool *pool;
	ion_phys_addr_t base;
	unsigned long allocated_bytes;
	unsigned long total_size;
	int (request_region)(void );
	int (release_region)(void );
	atomic_t map_count;
	void *bus_id;
	unsigned int has_outer_cache;
	};

	ion_phys_addr_t ion_carveout_allocate(struct ion_heap *heap,
	unsigned long size,
	unsigned long align)
	{
	struct ion_carveout_heap *carveout_heap =
	container_of(heap, struct ion_carveout_heap, heap);
	unsigned long offset = gen_pool_alloc_aligned(carveout_heap->pool,
	size, ilog2(align));

	if (!offset) {
	if ((carveout_heap->total_size -
	carveout_heap->allocated_bytes) >= size)
	pr_debug("%s: heap %s has enough memory (%lx) but"
	" the allocation of size %lx still failed."
	" Memory is probably fragmented.",
	__func__, heap->name,
	carveout_heap->total_size -
	carveout_heap->allocated_bytes, size);
	return ION_CARVEOUT_ALLOCATE_FAIL;
	}

	carveout_heap->allocated_bytes += size;
	return offset;
	}

	void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr,
	unsigned long size)
	{
	struct ion_carveout_heap *carveout_heap =
	container_of(heap, struct ion_carveout_heap, heap);

	if (addr == ION_CARVEOUT_ALLOCATE_FAIL)
	return;
	gen_pool_free(carveout_heap->pool, addr, size);
	carveout_heap->allocated_bytes -= size;
	}

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

	static int ion_carveout_heap_allocate(struct ion_heap *heap,
	struct ion_buffer *buffer,
	unsigned long size, unsigned long align,
	unsigned long flags)
	{
	buffer->priv_phys = ion_carveout_allocate(heap, size, align);
	return buffer->priv_phys == ION_CARVEOUT_ALLOCATE_FAIL ? -ENOMEM : 0;
	}

	static void ion_carveout_heap_free(struct ion_buffer *buffer)
	{
	struct ion_heap *heap = buffer->heap;

	ion_carveout_free(heap, buffer->priv_phys, buffer->size);
	buffer->priv_phys = ION_CARVEOUT_ALLOCATE_FAIL;
	}

	struct sg_table ion_carveout_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)
	goto err0;

	table->sgl->length = buffer->size;
	table->sgl->offset = 0;
	table->sgl->dma_address = buffer->priv_phys;

	return table;

	err0:
	kfree(table);
	return ERR_PTR(ret);
	}

	void ion_carveout_heap_unmap_dma(struct ion_heap *heap,
	struct ion_buffer *buffer)
	{
	if (buffer->sg_table)
	sg_free_table(buffer->sg_table);
	kfree(buffer->sg_table);
	buffer->sg_table = 0;
	}

	static int ion_carveout_request_region(struct ion_carveout_heap *carveout_heap)
	{
	int ret_value = 0;
	if (atomic_inc_return(&carveout_heap->map_count) == 1) {
	if (carveout_heap->request_region) {
	ret_value = carveout_heap->request_region(
	carveout_heap->bus_id);
	if (ret_value) {
	pr_err("Unable to request SMI region");
	atomic_dec(&carveout_heap->map_count);
	}
	}
	}
	return ret_value;
	}

	static int ion_carveout_release_region(struct ion_carveout_heap *carveout_heap)
	{
	int ret_value = 0;
	if (atomic_dec_and_test(&carveout_heap->map_count)) {
	if (carveout_heap->release_region) {
	ret_value = carveout_heap->release_region(
	carveout_heap->bus_id);
	if (ret_value)
	pr_err("Unable to release SMI region");
	}
	}
	return ret_value;
	}

	void ion_carveout_heap_map_kernel(struct ion_heap heap,
	struct ion_buffer *buffer)
	{
	struct ion_carveout_heap *carveout_heap =
	container_of(heap, struct ion_carveout_heap, heap);
	void *ret_value;

	if (ion_carveout_request_region(carveout_heap))
	return NULL;

	if (ION_IS_CACHED(buffer->flags))
	ret_value = ioremap_cached(buffer->priv_phys, buffer->size);
	else
	ret_value = ioremap(buffer->priv_phys, buffer->size);

	if (!ret_value)
	ion_carveout_release_region(carveout_heap);
	return ret_value;
	}

	void ion_carveout_heap_unmap_kernel(struct ion_heap *heap,
	struct ion_buffer *buffer)
	{
	struct ion_carveout_heap *carveout_heap =
	container_of(heap, struct ion_carveout_heap, heap);

	__arm_iounmap(buffer->vaddr);
	buffer->vaddr = NULL;

	ion_carveout_release_region(carveout_heap);
	return;
	}

	int ion_carveout_heap_map_user(struct ion_heap heap, struct ion_buffer buffer,
	struct vm_area_struct *vma)
	{
	struct ion_carveout_heap *carveout_heap =
	container_of(heap, struct ion_carveout_heap, heap);
	int ret_value = 0;

	if (ion_carveout_request_region(carveout_heap))
	return -EINVAL;

	if (!ION_IS_CACHED(buffer->flags))
	vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);

	ret_value = remap_pfn_range(vma, vma->vm_start,
	__phys_to_pfn(buffer->priv_phys) + vma->vm_pgoff,
	vma->vm_end - vma->vm_start,
	vma->vm_page_prot);

	if (ret_value)
	ion_carveout_release_region(carveout_heap);
	return ret_value;
	}

	void ion_carveout_heap_unmap_user(struct ion_heap *heap,
	struct ion_buffer *buffer)
	{
	struct ion_carveout_heap *carveout_heap =
	container_of(heap, struct ion_carveout_heap, heap);
	ion_carveout_release_region(carveout_heap);
	}

	int ion_carveout_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);
	struct ion_carveout_heap *carveout_heap =
	container_of(heap, struct ion_carveout_heap, heap);

	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 (carveout_heap->has_outer_cache) {
	unsigned long pstart = buffer->priv_phys + offset;
	outer_cache_op(pstart, pstart + length);
	}
	return 0;
	}

	static int ion_carveout_print_debug(struct ion_heap heap, struct seq_file s,
	const struct rb_root *mem_map)
	{
	struct ion_carveout_heap *carveout_heap =
	container_of(heap, struct ion_carveout_heap, heap);

	seq_printf(s, "total bytes currently allocated: %lx\n",
	carveout_heap->allocated_bytes);
	seq_printf(s, "total heap size: %lx\n", carveout_heap->total_size);

	if (mem_map) {
	unsigned long base = carveout_heap->base;
	unsigned long size = carveout_heap->total_size;
	unsigned long end = base+size;
	unsigned long last_end = base;
	struct rb_node *n;

	seq_printf(s, "\nMemory Map\n");
	seq_printf(s, "%16.s %14.s %14.s %14.s\n",
	"client", "start address", "end address",
	"size (hex)");

	for (n = rb_first(mem_map); n; n = rb_next(n)) {
	struct mem_map_data *data =
	rb_entry(n, struct mem_map_data, node);
	const char *client_name = "(null)";

	if (last_end < data->addr) {
	phys_addr_t da;

	da = data->addr-1;
	seq_printf(s, "%16.s %14pa %14pa %14lu (%lx)\n",
	"FREE", &last_end, &da,
	data->addr-last_end,
	data->addr-last_end);
	}

	if (data->client_name)
	client_name = data->client_name;

	seq_printf(s, "%16.s %14pa %14pa %14lu (%lx)\n",
	client_name, &data->addr,
	&data->addr_end,
	data->size, data->size);
	last_end = data->addr_end+1;
	}
	if (last_end < end) {
	seq_printf(s, "%16.s %14lx %14lx %14lu (%lx)\n", "FREE",
	last_end, end-1, end-last_end, end-last_end);
	}
	}
	return 0;
	}

	int ion_carveout_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)
	{
	struct iommu_domain *domain;
	int ret = 0;
	unsigned long extra;
	struct scatterlist *sglist = 0;
	int prot = IOMMU_WRITE \| IOMMU_READ;
	prot \|= ION_IS_CACHED(flags) ? IOMMU_CACHE : 0;

	data->mapped_size = iova_length;

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

	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;
	}

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

	sg_init_table(sglist, 1);
	sglist->length = buffer->size;
	sglist->offset = 0;
	sglist->dma_address = buffer->priv_phys;

	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;
	unsigned long phys_addr = sg_phys(sglist);
	ret = msm_iommu_map_extra(domain, extra_iova_addr, phys_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;
	}

	void ion_carveout_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;
	}

	static struct ion_heap_ops carveout_heap_ops = {
	.allocate = ion_carveout_heap_allocate,
	.free = ion_carveout_heap_free,
	.phys = ion_carveout_heap_phys,
	.map_user = ion_carveout_heap_map_user,
	.map_kernel = ion_carveout_heap_map_kernel,
	.unmap_user = ion_carveout_heap_unmap_user,
	.unmap_kernel = ion_carveout_heap_unmap_kernel,
	.map_dma = ion_carveout_heap_map_dma,
	.unmap_dma = ion_carveout_heap_unmap_dma,
	.cache_op = ion_carveout_cache_ops,
	.print_debug = ion_carveout_print_debug,
	.map_iommu = ion_carveout_heap_map_iommu,
	.unmap_iommu = ion_carveout_heap_unmap_iommu,
	};

	struct ion_heap ion_carveout_heap_create(struct ion_platform_heap heap_data)
	{
	struct ion_carveout_heap *carveout_heap;
	int ret;

	carveout_heap = kzalloc(sizeof(struct ion_carveout_heap), GFP_KERNEL);
	if (!carveout_heap)
	return ERR_PTR(-ENOMEM);

	carveout_heap->pool = gen_pool_create(12, -1);
	if (!carveout_heap->pool) {
	kfree(carveout_heap);
	return ERR_PTR(-ENOMEM);
	}
	carveout_heap->base = heap_data->base;
	ret = gen_pool_add(carveout_heap->pool, carveout_heap->base,
	heap_data->size, -1);
	if (ret < 0) {
	gen_pool_destroy(carveout_heap->pool);
	kfree(carveout_heap);
	return ERR_PTR(-EINVAL);
	}
	carveout_heap->heap.ops = &carveout_heap_ops;
	carveout_heap->heap.type = ION_HEAP_TYPE_CARVEOUT;
	carveout_heap->allocated_bytes = 0;
	carveout_heap->total_size = heap_data->size;
	carveout_heap->has_outer_cache = heap_data->has_outer_cache;

	if (heap_data->extra_data) {
	struct ion_co_heap_pdata *extra_data =
	heap_data->extra_data;

	if (extra_data->setup_region)
	carveout_heap->bus_id = extra_data->setup_region();
	if (extra_data->request_region)
	carveout_heap->request_region =
	extra_data->request_region;
	if (extra_data->release_region)
	carveout_heap->release_region =
	extra_data->release_region;
	}
	return &carveout_heap->heap;
	}

	void ion_carveout_heap_destroy(struct ion_heap *heap)
	{
	struct ion_carveout_heap *carveout_heap =
	container_of(heap, struct ion_carveout_heap, heap);

	gen_pool_destroy(carveout_heap->pool);
	kfree(carveout_heap);
	carveout_heap = NULL;
	}