i965: Add an interface for doing hiz ops from C code.

This required moving gen6_hiz_op, and I put it in intel_resolve_map.h
for the next commit.

Reviewed-by: Ian Romanick <[email protected]>
Reviewed-by: Chad Versace <[email protected]>

2 files changed, 32 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.h b/src/mesa/drivers/dri/intel/intel_mipmap_tree.h
index ca1666da2f5..e690a12312b 100644
--- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.h
+++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.h
@@ -421,6 +421,21 @@ intel_miptree_unmap(struct intel_context *intel,
 		    unsigned int level,
 		    unsigned int slice);
 
+#ifdef I915
+static inline void
+intel_hiz_exec(struct intel_context *intel, struct intel_mipmap_tree *mt,
+	       unsigned int level, unsigned int layer, enum gen6_hiz_op op)
+{
+   /* Stub on i915.  It would be nice if we didn't execute resolve code at all
+    * there.
+    */
+}
+#else
+void
+intel_hiz_exec(struct intel_context *intel, struct intel_mipmap_tree *mt,
+	       unsigned int level, unsigned int layer, enum gen6_hiz_op op);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/mesa/drivers/dri/intel/intel_resolve_map.h b/src/mesa/drivers/dri/intel/intel_resolve_map.h
index 1082c10e214..0f31ca80117 100644
--- a/src/mesa/drivers/dri/intel/intel_resolve_map.h
+++ b/src/mesa/drivers/dri/intel/intel_resolve_map.h
@@ -25,6 +25,23 @@
 
 #include <stdint.h>
 
+/**
+ * For an overview of the HiZ operations, see the following sections of the
+ * Sandy Bridge PRM, Volume 1, Part2:
+ *   - 7.5.3.1 Depth Buffer Clear
+ *   - 7.5.3.2 Depth Buffer Resolve
+ *   - 7.5.3.3 Hierarchical Depth Buffer Resolve
+ *
+ * Of these, two get entered in the resolve map as needing to be done to the
+ * buffer: depth resolve and hiz resolve.
+ */
+enum gen6_hiz_op {
+   GEN6_HIZ_OP_DEPTH_CLEAR,
+   GEN6_HIZ_OP_DEPTH_RESOLVE,
+   GEN6_HIZ_OP_HIZ_RESOLVE,
+   GEN6_HIZ_OP_NONE,
+};
+
 enum intel_need_resolve {
    INTEL_NEED_HIZ_RESOLVE,
    INTEL_NEED_DEPTH_RESOLVE,