drm/i915: Avoid snooping with userptr where not supported
commit e5756c10d841ddb448293c849392f3d6b809561f
Author: Imre Deak <imre.deak@intel.com>
Date: Fri Aug 14 18:43:30 2015 +0300
drm/i915/bxt: don't allow cached GEM mappings on A stepping
Added an exception of disallowing snooping for Broxton A
stepping hardware but userptr was still enabling it regardless.
Move the check to HAS_SNOOP now that it is used from multiple
call sites and use it.
v2: Userptr cannot be supported when it cannot be coherent and
generalize the code better. (Chris Wilson)
v3: Make has_snoop true only when !has_llc. (Chris Wilson)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1456920631-34302-1-git-send-email-tvrtko.ursulin@linux.intel.com
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 0e2fb5b..2cb0a41 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -786,6 +786,7 @@
func(overlay_needs_physical) sep \
func(supports_tv) sep \
func(has_llc) sep \
+ func(has_snoop) sep \
func(has_ddi) sep \
func(has_fpga_dbg)
@@ -2630,6 +2631,7 @@
#define HAS_BLT(dev) (INTEL_INFO(dev)->ring_mask & BLT_RING)
#define HAS_VEBOX(dev) (INTEL_INFO(dev)->ring_mask & VEBOX_RING)
#define HAS_LLC(dev) (INTEL_INFO(dev)->has_llc)
+#define HAS_SNOOP(dev) (INTEL_INFO(dev)->has_snoop)
#define HAS_WT(dev) ((IS_HASWELL(dev) || IS_BROADWELL(dev)) && \
__I915__(dev)->ellc_size)
#define I915_NEED_GFX_HWS(dev) (INTEL_INFO(dev)->need_gfx_hws)