drm/i915: vfuncs for gtt_clear_range/insert_entries
We have a few too many differences here, so finally take the prepared abstraction and run with it. A few smaller changes are required to get things into shape: - move i915_cache_level up since we need it in the gt funcs - split up i915_ggtt_clear_range and move the two functions down to where the relevant insert_entries functions are - adjustments to a few function parameter lists Now we have 2 functions which deal with the gen6+ global gtt (gen6_ggtt_ prefix) and 2 functions which deal with the legacy gtt code in the intel-gtt.c fake agp driver (i915_ggtt_ prefix). Init is still a bit a mess, but honestly I don't care about that. One thing I've thought about while deciding on the exact interfaces is a flag parameter for ->clear_range: We could use that to decide between writing invalid pte entries or scratch pte entries. In case we ever get around to fixing all our bugs which currently prevent us from filling the gtt with empty ptes for the truly unused ranges ... Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> [bwidawsk: Moved functions to the gtt struct] Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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