Memory map routine for gem objects
int drm_gem_mmap(struct file * filp, struct vm_area_struct * vma);
filp
DRM file pointer
vma
VMA for the area to be mapped
If a driver supports GEM object mapping, mmap calls on the DRM file descriptor will end up here.
Look up the GEM object based on the offset passed in (vma->vm_pgoff will contain the fake offset we created when the GTT map ioctl was called on the object) and map it with a call to drm_gem_mmap_obj.
If the caller is not granted access to the buffer object, the mmap will fail with EACCES. Please see the vma manager for more information.
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