From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 13 Jan 2015 13:32:52 +0000 (+0000)
Subject: drm/i915: Performed deferred clflush inside set-cache-level
X-Git-Tag: fixes-v4.0-rc1~91^2~8^2~53
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0f71979ab7fbd0c71c41c2798de3d33937915434;p=pandora-kernel.git

drm/i915: Performed deferred clflush inside set-cache-level

Currently we are hitting the WARN inside
i915_gem_object_set_cache_level() as we can now have an unbound object
in the GTT write domain (due to 43566dedde54f9 "drm/i915: Broaden
application of set-domain(GTT)"). To avoid the warning, we need to track
when we elided the clflush on a cacheable object and then evict the
cache for the object when we move the object out of a cacheable domain.

Reported-by: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Jani Nikula <jani.nikula@intel.com>
Testcase: igt/gem_mmap_wc/set-cache-level
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88607
Tested-by: huax.lu@intel.com
[danvet: Split if into nested if as discussion on the m-l.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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