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Commit 53ea7213 authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/tegra: gem: Use dma_mmap_writecombine() 



Use the existing API rather than open-coding equivalent functionality
in the driver.

Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent e55a8bd8

drivers/gpu/drm/tegra/gem.c

+12 −4
Original line number Diff line number Diff line
@@ -306,6 +306,7 @@ const struct vm_operations_struct tegra_bo_vm_ops = { 


int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma)

{

	unsigned long vm_pgoff = vma->vm_pgoff;

	struct drm_gem_object *gem;

	struct tegra_bo *bo;

	int ret;
@@ -317,14 +318,21 @@ int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma) 
	gem = vma->vm_private_data;

	bo = to_tegra_bo(gem);



	ret = remap_pfn_range(vma, vma->vm_start, bo->paddr >> PAGE_SHIFT,

			      vma->vm_end - vma->vm_start, vma->vm_page_prot);

	if (ret)

		drm_gem_vm_close(vma);

	vma->vm_flags &= ~VM_PFNMAP;

	vma->vm_pgoff = 0;



	ret = dma_mmap_writecombine(gem->dev->dev, vma, bo->vaddr, bo->paddr,

				    gem->size);

	if (ret) {

		drm_gem_vm_close(vma);

		return ret;

	}



	vma->vm_pgoff = vm_pgoff;



	return 0;

}



static struct sg_table *

tegra_gem_prime_map_dma_buf(struct dma_buf_attachment *attach,

			    enum dma_data_direction dir)