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drm/tegra: gem: Use dma_mmap_writecombine() 

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

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2014-09-24 16:14:04 +02:00
parent e55a8bd8ea
commit 53ea72132d
1 changed files with 13 additions and 5 deletions
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16
drivers/gpu/drm/tegra/gem.c
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@ -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) 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 drm_gem_object *gem;
struct tegra_bo *bo; struct tegra_bo *bo;
int ret; int ret;
@ -317,14 +318,21 @@ int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma)
gem = vma->vm_private_data; gem = vma->vm_private_data;
bo = to_tegra_bo(gem); bo = to_tegra_bo(gem);
ret = remap_pfn_range(vma, vma->vm_start, bo->paddr >> PAGE_SHIFT, vma->vm_flags &= ~VM_PFNMAP;
vma->vm_end - vma->vm_start, vma->vm_page_prot); vma->vm_pgoff = 0;
if (ret)
drm_gem_vm_close(vma);
ret = dma_mmap_writecombine(gem->dev->dev, vma, bo->vaddr, bo->paddr,
gem->size);
if (ret) {
drm_gem_vm_close(vma);
return ret; return ret;
} }
vma->vm_pgoff = vm_pgoff;
return 0;
}
static struct sg_table * static struct sg_table *
tegra_gem_prime_map_dma_buf(struct dma_buf_attachment *attach, tegra_gem_prime_map_dma_buf(struct dma_buf_attachment *attach,
enum dma_data_direction dir) enum dma_data_direction dir)