tree d6fa49cf6b9a1788f7fc1b87916f20e537ec5459
parent d86ed34a4eeefffcc9030e903465a902f6aea9f3
author Chris Wilson <chris@chris-wilson.co.uk> 1430207283 +0100
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1431083002 +0200

drm/i915: Remove incorrect restriction on 32bit offsets in ppGTT backend

This is the wrong layer to apply an arbitrary restriction and the wrong
error code (object too large!). If we do want to prevent large offsets
being return to the user on 32bit systems (to hide bugs in userspace),
you want to restrict the drm_mm range manager instead. This first tells
userspace about the correct size of the GTT they can use (so they don't
try and overallocate object or batches), and fixes the eviction logic to
avoid the eventual and *guaranteed* error.

Fixes regression in
commit d7b2633dba04ef0fd7385f02a7b552abc5f1062f
Author: Michel Thierry <michel.thierry@intel.com>
Date:   Wed Apr 8 12:13:34 2015 +0100

    drm/i915/gen8: Dynamic page table allocations

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michel Thierry <michel.thierry@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>