1 files changed, 279 insertions, 0 deletions
diff --git a/drivers/gpu/ion/sprd/sprd_ion_cma_heap.c b/drivers/gpu/ion/sprd/sprd_ion_cma_heap.c
new file mode 100644
index 00000000..ef5be551
--- /dev/null
+++ b/drivers/gpu/ion/sprd/sprd_ion_cma_heap.c
@@ -0,0 +1,279 @@
+/*
+ * Copyright (C) 2013 Spreadtrum Communications 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 <linux/spinlock.h>
+
+#include <linux/err.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 "../ion_priv.h"
+
+#ifndef CONFIG_ARCH_SCX35L64
+#include <asm/mach/map.h>
+#endif
+#include <video/ion_sprd.h>
+#include <linux/device.h>
+#include <linux/dma-contiguous.h>
+#include <linux/genalloc.h>
+
+#ifdef CONFIG_ION_DEBUG
+#ifndef DEBUG
+#define DEBUG
+#endif
+#endif
+
+#define ION_CMA_ALLOCATE_FAIL -1
+
+struct device *ion_dev;
+
+struct ion_cma_heap {
+	struct ion_heap heap;
+	struct gen_pool *pool;
+	ion_phys_addr_t poolbase;
+	size_t               poolsize;
+};
+
+ion_phys_addr_t ion_cma_allocate(struct ion_heap *heap,
+				      unsigned long size,
+				      unsigned long align)
+{
+	struct ion_cma_heap *cma_heap =
+		container_of(heap, struct ion_cma_heap, heap);
+	if(cma_heap->pool == NULL)
+	{
+		struct page *page;
+		ion_phys_addr_t phys;
+		int pagecount = ((PAGE_ALIGN(size)) >> PAGE_SHIFT);
+		struct timeval val;
+		int start, end;
+		do_gettimeofday(&val);
+		start = (val.tv_sec * 1000000 + val.tv_usec) / 1000;
+		page = dma_alloc_from_contiguous(ion_dev, pagecount, get_order(size));
+		do_gettimeofday(&val);
+		end = (val.tv_sec * 1000000 + val.tv_usec) / 1000;
+		if(!page) {
+			pr_err("ion: malloc dma_alloc_from_contiguous() failed size:0x%lx , pageCount:%d\n" , size , pagecount);
+			return ION_CMA_ALLOCATE_FAIL;
+		}
+		phys = page_to_phys(page);
+		printk("ion: malloc from cma mem: size=%08lx,phy addr=%08lx, time=%dms\n", size, phys, end-start);
+		return phys;
+	} else {
+		unsigned long offset = gen_pool_alloc(cma_heap->pool, size);
+		pr_debug("ion: malloc from reserved mem: size=%08lx, pool=%p, offset=%08lx \n", size, cma_heap->pool, offset);
+		if (!offset)
+			return ION_CARVEOUT_ALLOCATE_FAIL;
+		return offset;
+	}
+}
+
+void ion_cma_free(struct ion_heap *heap, ion_phys_addr_t addr,
+		       unsigned long size)
+{
+	struct ion_cma_heap *cma_heap =
+		container_of(heap, struct ion_cma_heap, heap);
+
+	if (addr == ION_CMA_ALLOCATE_FAIL)
+		return;
+	/*free reserved memory*/
+	if((cma_heap->pool != NULL) && ((addr < (cma_heap->poolbase +cma_heap->poolsize)) && (addr >= cma_heap->poolbase)))
+	{
+		pr_debug("ion: free reserved mem: size=%08lx, pool=%p, base:%08lx , phyaddr=%08lx \n", size, cma_heap->pool, cma_heap->poolbase , addr);
+		gen_pool_free(cma_heap->pool, addr, size);
+	}
+	else
+	{
+		struct page *page;
+		int pagecount = ((PAGE_ALIGN(size)) >> PAGE_SHIFT);
+		page = phys_to_page(addr);
+		pr_debug("ion: free cma mem: size=%08lx, phyAddr=%08lx \n", size, addr);
+		dma_release_from_contiguous(ion_dev, page, pagecount);
+	}
+	return;
+}
+
+static int ion_cma_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_cma_heap_allocate(struct ion_heap *heap,
+				      struct ion_buffer *buffer,
+				      unsigned long size, unsigned long align,
+				      unsigned long flags)
+{
+	buffer->priv_phys = ion_cma_allocate(heap, size, align);
+	pr_debug("pgprot_noncached flags 0x%lx\n",flags);
+	if(flags&(1<<31))
+		buffer->flags |= (1<<31);
+	else
+		buffer->flags &= (~(1<<31));
+	buffer->flags |= (flags & 0x7FFF0000);/*for debug*/
+	return buffer->priv_phys == ION_CMA_ALLOCATE_FAIL ? -ENOMEM : 0;
+}
+
+static void ion_cma_heap_free(struct ion_buffer *buffer)
+{
+	struct ion_heap *heap = buffer->heap;
+
+	ion_cma_free(heap, buffer->priv_phys, buffer->size);
+	buffer->priv_phys = ION_CMA_ALLOCATE_FAIL;
+}
+
+struct sg_table *ion_cma_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, phys_to_page(buffer->priv_phys), buffer->size,
+		    0);
+	return table;
+}
+
+void ion_cma_heap_unmap_dma(struct ion_heap *heap,
+				 struct ion_buffer *buffer)
+{
+	sg_free_table(buffer->sg_table);
+	kfree(buffer->sg_table);
+	buffer->sg_table = NULL;
+}
+
+void *ion_cma_heap_map_kernel(struct ion_heap *heap,
+				   struct ion_buffer *buffer)
+{
+#ifndef CONFIG_ARCH_SCX35L64
+	int mtype = MT_MEMORY_NONCACHED;
+#else
+	pgprot_t mtype = 11;
+#endif
+
+	if (buffer->flags & ION_FLAG_CACHED)
+#ifndef CONFIG_ARCH_SCX35L64
+		mtype = MT_MEMORY;
+#else
+		mtype = 9;
+#endif
+
+#ifndef CONFIG_ARCH_SCX35L64
+	return __arm_ioremap(buffer->priv_phys, buffer->size,
+			      mtype);
+#else
+        return __ioremap(buffer->priv_phys, buffer->priv_phys, mtype);
+#endif
+}
+
+void ion_cma_heap_unmap_kernel(struct ion_heap *heap,
+				    struct ion_buffer *buffer)
+{
+#ifndef CONFIG_ARCH_SCX35L64
+	__arm_iounmap(buffer->vaddr);
+#else
+      __iounmap(buffer->vaddr);
+#endif
+
+	buffer->vaddr = NULL;
+	return;
+}
+
+int ion_cma_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
+			       struct vm_area_struct *vma)
+{
+	if((buffer->flags & (1<<31)) )
+	{
+		pr_debug("pgprot_cached buffer->flags 0x%lx\n",buffer->flags);
+		return remap_pfn_range(vma, vma->vm_start,
+			       __phys_to_pfn(buffer->priv_phys) + vma->vm_pgoff,
+			       buffer->size,
+			       (vma->vm_page_prot));
+
+	}
+	else
+	{
+		pr_debug("pgprot_noncached buffer->flags 0x%lx\n",buffer->flags);
+		return remap_pfn_range(vma, vma->vm_start,
+			       __phys_to_pfn(buffer->priv_phys) + vma->vm_pgoff,
+			       vma->vm_end - vma->vm_start,
+			       pgprot_noncached(vma->vm_page_prot));
+
+	}
+}
+
+static struct ion_heap_ops cma_heap_ops = {
+	.allocate = ion_cma_heap_allocate,
+	.free = ion_cma_heap_free,
+	.map_dma = ion_cma_heap_map_dma,
+	.unmap_dma = ion_cma_heap_unmap_dma,
+	.phys = ion_cma_heap_phys,
+	.map_user = ion_cma_heap_map_user,
+	.map_kernel = ion_cma_heap_map_kernel,
+	.unmap_kernel = ion_cma_heap_unmap_kernel,
+};
+
+struct ion_heap *ion_cma_heap_create(struct ion_platform_heap *heap_data, struct device *dev)
+{
+	struct ion_cma_heap *cma_heap;
+	cma_heap = kzalloc(sizeof(struct ion_cma_heap), GFP_KERNEL);
+	if (!cma_heap)
+		return ERR_PTR(-ENOMEM);
+	if(heap_data->size != 0)
+	{
+		cma_heap->pool = gen_pool_create(12 , -1);
+		if (!cma_heap->pool) {
+			kfree(cma_heap);
+			return ERR_PTR(-ENOMEM);
+		}
+		cma_heap->poolbase = heap_data->base;
+		gen_pool_add(cma_heap->pool, cma_heap->poolbase, heap_data->size,
+				     -1);
+		cma_heap->poolsize = heap_data->size;
+	}
+	else
+	{
+		cma_heap->pool = NULL;
+		cma_heap->poolbase = 0;
+		cma_heap->poolsize = 0;
+	}
+	cma_heap->heap.ops = &cma_heap_ops;
+	cma_heap->heap.type = ION_HEAP_TYPE_CUSTOM;
+	ion_dev = dev;
+	return &cma_heap->heap;
+}
+
+void ion_cma_heap_destroy(struct ion_heap *heap)
+{
+	struct ion_cma_heap *cma_heap =
+		container_of(heap, struct  ion_cma_heap, heap);
+	if(cma_heap->pool)
+	{
+		gen_pool_destroy(cma_heap->pool);
+	}
+
+	kfree(cma_heap);
+	cma_heap = NULL;
+}