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drm: GEM CMA: Split object mapping into GEM mapping and CMA mapping 

The CMA-specific mapping code will be used to implement dma-buf mmap
support.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Laurent Pinchart 2013-04-16 14:32:34 +02:00
parent a5ed8940d3
commit ebaf9e033e
1 changed files with 15 additions and 7 deletions
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22
drivers/gpu/drm/drm_gem_cma_helper.c
View File

@ -228,13 +228,26 @@ const struct vm_operations_struct drm_gem_cma_vm_ops = {
};
EXPORT_SYMBOL_GPL(drm_gem_cma_vm_ops);
static int drm_gem_cma_mmap_obj(struct drm_gem_cma_object *cma_obj,
struct vm_area_struct *vma)
{
int ret;
ret = remap_pfn_range(vma, vma->vm_start, cma_obj->paddr >> PAGE_SHIFT,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
if (ret)
drm_gem_vm_close(vma);
return ret;
}
/*
* drm_gem_cma_mmap - (struct file_operation)->mmap callback function
*/
int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_gem_object *gem_obj;
struct drm_gem_cma_object *cma_obj;
struct drm_gem_object *gem_obj;
int ret;
ret = drm_gem_mmap(filp, vma);
@ -244,12 +257,7 @@ int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma)
gem_obj = vma->vm_private_data;
cma_obj = to_drm_gem_cma_obj(gem_obj);
ret = remap_pfn_range(vma, vma->vm_start, cma_obj->paddr >> PAGE_SHIFT,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
if (ret)
drm_gem_vm_close(vma);
return ret;
return drm_gem_cma_mmap_obj(cma_obj, vma);
}
EXPORT_SYMBOL_GPL(drm_gem_cma_mmap);