[PATCH 04/38] drm/i915: Allow HW status page to be bound high

[Chris Wilson]

At the time of commit 1f767e02d69f ("drm/i915: HWS must be in the
mappable region for g33"), drm_mm insertion would often default to
placing a new object high in the zone forcing us to specify that certain
HWSP must be bound within the low mappable region. Since then, drm_mm
has gained more finesse over its placement and exposes that to the
caller, commit 4e64e5539d15 ("drm: Improve drm_mm search (and fix
topdown allocation) with rbtrees"). As such where possible we want the
HWSP to be outside of the mappable aperture and so need to specify that
can be pinned high.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Michel Thierry <michel.thierry at intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Mika Kuoppala <mika.kuoppala at intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_engine_cs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index 8a5535ad6552..32d35f32d289 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -508,6 +508,8 @@ static int init_status_page(struct intel_engine_cs *engine)
 		 * actually map it).
 		 */
 		flags |= PIN_MAPPABLE;
+	else
+		flags |= PIN_HIGH;
 	ret = i915_vma_pin(vma, 0, 4096, flags);
 	if (ret)
 		goto err;
-- 
2.14.1