NAME
drm_gem_create_mmap_offset_size - create a fake mmap offset for an object
SYNOPSIS
int drm_gem_create_mmap_offset_size(struct drm_gem_object * obj, size_t size);
ARGUMENTS
obj
obj in question
size
the virtual size
DESCRIPTION
GEM memory mapping works by handing back to userspace a fake mmap offset it can use in a subsequent mmap(2) call. The DRM core code then looks up the object based on the offset and sets up the various memory mapping structures.
This routine allocates and attaches a fake offset for obj, in cases where the virtual size differs from the physical size (ie. obj->size). Otherwise just use drm_gem_create_mmap_offset.
AUTHORS
Jesse Barnes <[email protected]>
Intel Corporation,
Initial version
Laurent Pinchart <[email protected]>
Ideas on board SPRL,
Driver internals
Daniel Vetter <[email protected]>
Intel Corporation,
Contributions all over the place