[PATCH] i965: alloc cached bo for query object on Sandybridge

[Zhenyu Wang <zhenyuw@linux.intel.com>]

Use new interface for cached bo create for query object on Sandybridge,
which is required for PIPE_CONTROL store buffer to be CPU cacheable.
---
 src/mesa/drivers/dri/i965/brw_queryobj.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_queryobj.c b/src/mesa/drivers/dri/i965/brw_queryobj.c
index f28f286..8c639de 100644
--- a/src/mesa/drivers/dri/i965/brw_queryobj.c
+++ b/src/mesa/drivers/dri/i965/brw_queryobj.c
@@ -231,7 +231,11 @@ brw_prepare_query_begin(struct brw_context *brw)
       drm_intel_bo_unreference(brw->query.bo);
       brw->query.bo = NULL;
 
-      brw->query.bo = drm_intel_bo_alloc(intel->bufmgr, "query", 4096, 1);
+      /* Sandybridge requires PIPE_CONTROL write DW to be LLC cached. */
+      if (intel->gen >= 6)
+	  brw->query.bo = drm_intel_gem_bo_alloc_cached(intel->bufmgr, "query", 4096, 1);
+      else
+	  brw->query.bo = drm_intel_bo_alloc(intel->bufmgr, "query", 4096, 1);
       brw->query.index = 0;
    }
 
-- 
1.7.1