ion: move into staging

Move ion from drivers/gpu/ion to drivers/android/staging/ion.

Change-Id: Id6e996aa3954cbb8e1a8abc9578a56204f5eb211
Signed-off-by: Colin Cross <ccross@android.com>

1 files changed, 0 insertions, 450 deletions

diff --git a/drivers/gpu/ion/ion_system_heap.c b/drivers/gpu/ion/ion_system_heap.c
deleted file mode 100644
index 5fe81a76f2f..00000000000
--- a/drivers/gpu/ion/ion_system_heap.c
+++ /dev/null
@@ -1,450 +0,0 @@
-/*
- * drivers/gpu/ion/ion_system_heap.c
- *
- * Copyright (C) 2011 Google, Inc.
- *
- * 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 <asm/page.h>
-#include <linux/dma-mapping.h>
-#include <linux/err.h>
-#include <linux/highmem.h>
-#include <linux/ion.h>
-#include <linux/mm.h>
-#include <linux/scatterlist.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include "ion_priv.h"
-
-static unsigned int high_order_gfp_flags = (GFP_HIGHUSER | __GFP_ZERO |
-					    __GFP_NOWARN | __GFP_NORETRY) &
-					   ~__GFP_WAIT;
-static unsigned int low_order_gfp_flags  = (GFP_HIGHUSER | __GFP_ZERO |
-					 __GFP_NOWARN);
-static const unsigned int orders[] = {8, 4, 0};
-static const int num_orders = ARRAY_SIZE(orders);
-static int order_to_index(unsigned int order)
-{
-	int i;
-	for (i = 0; i < num_orders; i++)
-		if (order == orders[i])
-			return i;
-	BUG();
-	return -1;
-}
-
-static unsigned int order_to_size(int order)
-{
-	return PAGE_SIZE << order;
-}
-
-struct ion_system_heap {
-	struct ion_heap heap;
-	struct ion_page_pool **pools;
-};
-
-struct page_info {
-	struct page *page;
-	unsigned int order;
-	struct list_head list;
-};
-
-static struct page *alloc_buffer_page(struct ion_system_heap *heap,
-				      struct ion_buffer *buffer,
-				      unsigned long order)
-{
-	bool cached = ion_buffer_cached(buffer);
-	struct ion_page_pool *pool = heap->pools[order_to_index(order)];
-	struct page *page;
-
-	if (!cached) {
-		page = ion_page_pool_alloc(pool);
-	} else {
-		gfp_t gfp_flags = low_order_gfp_flags;
-
-		if (order > 4)
-			gfp_flags = high_order_gfp_flags;
-		page = ion_heap_alloc_pages(buffer, gfp_flags, order);
-		if (!page)
-			return 0;
-		arm_dma_ops.sync_single_for_device(NULL,
-			pfn_to_dma(NULL, page_to_pfn(page)),
-			PAGE_SIZE << order, DMA_BIDIRECTIONAL);
-	}
-	if (!page)
-		return 0;
-
-	return page;
-}
-
-static void free_buffer_page(struct ion_system_heap *heap,
-			     struct ion_buffer *buffer, struct page *page,
-			     unsigned int order)
-{
-	bool cached = ion_buffer_cached(buffer);
-	bool split_pages = ion_buffer_fault_user_mappings(buffer);
-	int i;
-
-	if (!cached) {
-		struct ion_page_pool *pool = heap->pools[order_to_index(order)];
-		ion_page_pool_free(pool, page);
-	} else if (split_pages) {
-		for (i = 0; i < (1 << order); i++)
-			__free_page(page + i);
-	} else {
-		__free_pages(page, order);
-	}
-}
-
-
-static struct page_info *alloc_largest_available(struct ion_system_heap *heap,
-						 struct ion_buffer *buffer,
-						 unsigned long size,
-						 unsigned int max_order)
-{
-	struct page *page;
-	struct page_info *info;
-	int i;
-
-	for (i = 0; i < num_orders; i++) {
-		if (size < order_to_size(orders[i]))
-			continue;
-		if (max_order < orders[i])
-			continue;
-
-		page = alloc_buffer_page(heap, buffer, orders[i]);
-		if (!page)
-			continue;
-
-		info = kmalloc(sizeof(struct page_info), GFP_KERNEL);
-		info->page = page;
-		info->order = orders[i];
-		return info;
-	}
-	return NULL;
-}
-
-static int ion_system_heap_allocate(struct ion_heap *heap,
-				     struct ion_buffer *buffer,
-				     unsigned long size, unsigned long align,
-				     unsigned long flags)
-{
-	struct ion_system_heap *sys_heap = container_of(heap,
-							struct ion_system_heap,
-							heap);
-	struct sg_table *table;
-	struct scatterlist *sg;
-	int ret;
-	struct list_head pages;
-	struct page_info *info, *tmp_info;
-	int i = 0;
-	long size_remaining = PAGE_ALIGN(size);
-	unsigned int max_order = orders[0];
-
-	INIT_LIST_HEAD(&pages);
-	while (size_remaining > 0) {
-		info = alloc_largest_available(sys_heap, buffer, size_remaining, max_order);
-		if (!info)
-			goto err;
-		list_add_tail(&info->list, &pages);
-		size_remaining -= (1 << info->order) * PAGE_SIZE;
-		max_order = info->order;
-		i++;
-	}
-
-	table = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
-	if (!table)
-		goto err;
-
-	ret = sg_alloc_table(table, i, GFP_KERNEL);
-	if (ret)
-		goto err1;
-
-	sg = table->sgl;
-	list_for_each_entry_safe(info, tmp_info, &pages, list) {
-		struct page *page = info->page;
-		sg_set_page(sg, page, (1 << info->order) * PAGE_SIZE, 0);
-		sg = sg_next(sg);
-		list_del(&info->list);
-		kfree(info);
-	}
-
-	buffer->priv_virt = table;
-	return 0;
-err1:
-	kfree(table);
-err:
-	list_for_each_entry(info, &pages, list) {
-		free_buffer_page(sys_heap, buffer, info->page, info->order);
-		kfree(info);
-	}
-	return -ENOMEM;
-}
-
-void ion_system_heap_free(struct ion_buffer *buffer)
-{
-	struct ion_heap *heap = buffer->heap;
-	struct ion_system_heap *sys_heap = container_of(heap,
-							struct ion_system_heap,
-							heap);
-	struct sg_table *table = buffer->sg_table;
-	bool cached = ion_buffer_cached(buffer);
-	struct scatterlist *sg;
-	LIST_HEAD(pages);
-	int i;
-
-	/* uncached pages come from the page pools, zero them before returning
-	   for security purposes (other allocations are zerod at alloc time */
-	if (!cached)
-		ion_heap_buffer_zero(buffer);
-
-	for_each_sg(table->sgl, sg, table->nents, i)
-		free_buffer_page(sys_heap, buffer, sg_page(sg),
-				get_order(sg_dma_len(sg)));
-	sg_free_table(table);
-	kfree(table);
-}
-
-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;
-}
-
-static struct ion_heap_ops system_heap_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_heap_map_kernel,
-	.unmap_kernel = ion_heap_unmap_kernel,
-	.map_user = ion_heap_map_user,
-};
-
-static int ion_system_heap_shrink(struct shrinker *shrinker,
-				  struct shrink_control *sc) {
-
-	struct ion_heap *heap = container_of(shrinker, struct ion_heap,
-					     shrinker);
-	struct ion_system_heap *sys_heap = container_of(heap,
-							struct ion_system_heap,
-							heap);
-	int nr_total = 0;
-	int nr_freed = 0;
-	int i;
-
-	if (sc->nr_to_scan == 0)
-		goto end;
-
-	/* shrink the free list first, no point in zeroing the memory if
-	   we're just going to reclaim it */
-	nr_freed += ion_heap_freelist_drain(heap, sc->nr_to_scan * PAGE_SIZE) /
-		PAGE_SIZE;
-
-	if (nr_freed >= sc->nr_to_scan)
-		goto end;
-
-	for (i = 0; i < num_orders; i++) {
-		struct ion_page_pool *pool = sys_heap->pools[i];
-
-		nr_freed += ion_page_pool_shrink(pool, sc->gfp_mask,
-						 sc->nr_to_scan);
-		if (nr_freed >= sc->nr_to_scan)
-			break;
-	}
-
-end:
-	/* total number of items is whatever the page pools are holding
-	   plus whatever's in the freelist */
-	for (i = 0; i < num_orders; i++) {
-		struct ion_page_pool *pool = sys_heap->pools[i];
-		nr_total += ion_page_pool_shrink(pool, sc->gfp_mask, 0);
-	}
-	nr_total += ion_heap_freelist_size(heap) / PAGE_SIZE;
-	return nr_total;
-
-}
-
-static int ion_system_heap_debug_show(struct ion_heap *heap, struct seq_file *s,
-				      void *unused)
-{
-
-	struct ion_system_heap *sys_heap = container_of(heap,
-							struct ion_system_heap,
-							heap);
-	int i;
-	for (i = 0; i < num_orders; i++) {
-		struct ion_page_pool *pool = sys_heap->pools[i];
-		seq_printf(s, "%d order %u highmem pages in pool = %lu total\n",
-			   pool->high_count, pool->order,
-			   (1 << pool->order) * PAGE_SIZE * pool->high_count);
-		seq_printf(s, "%d order %u lowmem pages in pool = %lu total\n",
-			   pool->low_count, pool->order,
-			   (1 << pool->order) * PAGE_SIZE * pool->low_count);
-	}
-	return 0;
-}
-
-struct ion_heap *ion_system_heap_create(struct ion_platform_heap *unused)
-{
-	struct ion_system_heap *heap;
-	int i;
-
-	heap = kzalloc(sizeof(struct ion_system_heap), GFP_KERNEL);
-	if (!heap)
-		return ERR_PTR(-ENOMEM);
-	heap->heap.ops = &system_heap_ops;
-	heap->heap.type = ION_HEAP_TYPE_SYSTEM;
-	heap->heap.flags = ION_HEAP_FLAG_DEFER_FREE;
-	heap->pools = kzalloc(sizeof(struct ion_page_pool *) * num_orders,
-			      GFP_KERNEL);
-	if (!heap->pools)
-		goto err_alloc_pools;
-	for (i = 0; i < num_orders; i++) {
-		struct ion_page_pool *pool;
-		gfp_t gfp_flags = low_order_gfp_flags;
-
-		if (orders[i] > 4)
-			gfp_flags = high_order_gfp_flags;
-		pool = ion_page_pool_create(gfp_flags, orders[i]);
-		if (!pool)
-			goto err_create_pool;
-		heap->pools[i] = pool;
-	}
-
-	heap->heap.shrinker.shrink = ion_system_heap_shrink;
-	heap->heap.shrinker.seeks = DEFAULT_SEEKS;
-	heap->heap.shrinker.batch = 0;
-	register_shrinker(&heap->heap.shrinker);
-	heap->heap.debug_show = ion_system_heap_debug_show;
-	return &heap->heap;
-err_create_pool:
-	for (i = 0; i < num_orders; i++)
-		if (heap->pools[i])
-			ion_page_pool_destroy(heap->pools[i]);
-	kfree(heap->pools);
-err_alloc_pools:
-	kfree(heap);
-	return ERR_PTR(-ENOMEM);
-}
-
-void ion_system_heap_destroy(struct ion_heap *heap)
-{
-	struct ion_system_heap *sys_heap = container_of(heap,
-							struct ion_system_heap,
-							heap);
-	int i;
-
-	for (i = 0; i < num_orders; i++)
-		ion_page_pool_destroy(sys_heap->pools[i]);
-	kfree(sys_heap->pools);
-	kfree(sys_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;
-	return 0;
-}
-
-void ion_system_contig_heap_free(struct ion_buffer *buffer)
-{
-	kfree(buffer->priv_virt);
-}
-
-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;
-}
-
-void ion_system_contig_heap_unmap_dma(struct ion_heap *heap,
-				      struct ion_buffer *buffer)
-{
-	sg_free_table(buffer->sg_table);
-	kfree(buffer->sg_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));
-	return remap_pfn_range(vma, vma->vm_start, pfn + vma->vm_pgoff,
-			       vma->vm_end - vma->vm_start,
-			       vma->vm_page_prot);
-
-}
-
-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_contig_heap_unmap_dma,
-	.map_kernel = ion_heap_map_kernel,
-	.unmap_kernel = ion_heap_unmap_kernel,
-	.map_user = ion_system_contig_heap_map_user,
-};
-
-struct ion_heap *ion_system_contig_heap_create(struct ion_platform_heap *unused)
-{
-	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;
-	return heap;
-}
-
-void ion_system_contig_heap_destroy(struct ion_heap *heap)
-{
-	kfree(heap);
-}
-