Merge "iommu: dma-mapping-fast: Add mmap support"

#include <linux/dma-mapping.h>

#include <linux/dma-mapping-fast.h>

#include <linux/io-pgtable-fast.h>

#include <linux/vmalloc.h>

#include <asm/cacheflush.h>

#include <asm/dma-iommu.h>

	__fast_smmu_free_pages(pages, count);

}

static int fast_smmu_mmap_attrs(struct device *dev, struct vm_area_struct *vma,

				void *cpu_addr, dma_addr_t dma_addr,

				size_t size, struct dma_attrs *attrs)

{

	struct vm_struct *area;

	unsigned long uaddr = vma->vm_start;

	struct page **pages;

	int i, nr_pages, ret = 0;

	vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);

	area = find_vm_area(cpu_addr);

	if (!area)

		return -EINVAL;

	pages = area->pages;

	nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;

	for (i = vma->vm_pgoff; i < nr_pages && uaddr < vma->vm_end; i++) {

		ret = vm_insert_page(vma, uaddr, pages[i]);

		if (ret)

			break;

		uaddr += PAGE_SIZE;

	}

	return ret;

}

static int fast_smmu_dma_supported(struct device *dev, u64 mask)

{

	return mask <= 0xffffffff;

static const struct dma_map_ops fast_smmu_dma_ops = {

	.alloc = fast_smmu_alloc,

	.free = fast_smmu_free,

	.mmap = fast_smmu_mmap_attrs,

	.map_page = fast_smmu_map_page,

	.unmap_page = fast_smmu_unmap_page,

	.map_sg = fast_smmu_map_sg,