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path: root/drivers/gpu/drm/drm_gem.c
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Diffstat (limited to 'drivers/gpu/drm/drm_gem.c')
-rw-r--r--drivers/gpu/drm/drm_gem.c40
1 files changed, 28 insertions, 12 deletions
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 6854f5867d51..000fa4a1899f 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -1099,23 +1099,12 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
struct vm_area_struct *vma)
{
struct drm_device *dev = obj->dev;
+ int ret;
/* Check for valid size. */
if (obj_size < vma->vm_end - vma->vm_start)
return -EINVAL;
- if (obj->funcs && obj->funcs->vm_ops)
- vma->vm_ops = obj->funcs->vm_ops;
- else if (dev->driver->gem_vm_ops)
- vma->vm_ops = dev->driver->gem_vm_ops;
- else
- return -EINVAL;
-
- vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
- vma->vm_private_data = obj;
- vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
- vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
-
/* Take a ref for this mapping of the object, so that the fault
* handler can dereference the mmap offset's pointer to the object.
* This reference is cleaned up by the corresponding vm_close
@@ -1124,6 +1113,33 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
*/
drm_gem_object_get(obj);
+ if (obj->funcs && obj->funcs->mmap) {
+ /* Remove the fake offset */
+ vma->vm_pgoff -= drm_vma_node_start(&obj->vma_node);
+
+ ret = obj->funcs->mmap(obj, vma);
+ if (ret) {
+ drm_gem_object_put_unlocked(obj);
+ return ret;
+ }
+ WARN_ON(!(vma->vm_flags & VM_DONTEXPAND));
+ } else {
+ if (obj->funcs && obj->funcs->vm_ops)
+ vma->vm_ops = obj->funcs->vm_ops;
+ else if (dev->driver->gem_vm_ops)
+ vma->vm_ops = dev->driver->gem_vm_ops;
+ else {
+ drm_gem_object_put_unlocked(obj);
+ return -EINVAL;
+ }
+
+ vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
+ vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
+ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+ }
+
+ vma->vm_private_data = obj;
+
return 0;
}
EXPORT_SYMBOL(drm_gem_mmap_obj);