drm/i915: allow stolen, pre-allocated objects to avoid GTT allocation v2
In some cases, we may not need GTT address space allocated to a stolen
object, so allow passing -1 to the preallocated function to indicate as
much.
v2: remove BUG_ON(gtt_offset & 4095) now that -1 is allowed (Ville)
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 913994c..89cbfab 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -339,7 +339,6 @@
/* KISS and expect everything to be page-aligned */
BUG_ON(stolen_offset & 4095);
- BUG_ON(gtt_offset & 4095);
BUG_ON(size & 4095);
if (WARN_ON(size == 0))
@@ -360,6 +359,10 @@
return NULL;
}
+ /* Some objects just need physical mem from stolen space */
+ if (gtt_offset == -1)
+ return obj;
+
/* To simplify the initialisation sequence between KMS and GTT,
* we allow construction of the stolen object prior to
* setting up the GTT space. The actual reservation will occur