i965: Start adding support for the Sandybridge CC unit.

1 files changed, 169 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/gen6_depthstencil.c b/src/mesa/drivers/dri/i965/gen6_depthstencil.c
new file mode 100644
index 0000000000..960927164c
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/gen6_depthstencil.c
@@ -0,0 +1,169 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include "brw_context.h"
+#include "brw_state.h"
+#include "brw_defines.h"
+#include "brw_util.h"
+#include "main/macros.h"
+#include "main/enums.h"
+
+struct brw_depth_stencil_state_key {
+   GLenum depth_func;
+   GLboolean depth_test, depth_write;
+   GLboolean stencil, stencil_two_side;
+   GLenum stencil_func[2], stencil_fail_op[2];
+   GLenum stencil_pass_depth_fail_op[2], stencil_pass_depth_pass_op[2];
+   GLubyte stencil_write_mask[2], stencil_test_mask[2];
+};
+
+static void
+depth_stencil_state_populate_key(struct brw_context *brw,
+				 struct brw_depth_stencil_state_key *key)
+{
+   GLcontext *ctx = &brw->intel.ctx;
+   const unsigned back = ctx->Stencil._BackFace;
+
+   memset(key, 0, sizeof(*key));
+
+   /* _NEW_STENCIL */
+   key->stencil = ctx->Stencil._Enabled;
+   key->stencil_two_side = ctx->Stencil._TestTwoSide;
+
+   if (key->stencil) {
+      key->stencil_func[0] = ctx->Stencil.Function[0];
+      key->stencil_fail_op[0] = ctx->Stencil.FailFunc[0];
+      key->stencil_pass_depth_fail_op[0] = ctx->Stencil.ZFailFunc[0];
+      key->stencil_pass_depth_pass_op[0] = ctx->Stencil.ZPassFunc[0];
+      key->stencil_write_mask[0] = ctx->Stencil.WriteMask[0];
+      key->stencil_test_mask[0] = ctx->Stencil.ValueMask[0];
+   }
+   if (key->stencil_two_side) {
+      key->stencil_func[1] = ctx->Stencil.Function[back];
+      key->stencil_fail_op[1] = ctx->Stencil.FailFunc[back];
+      key->stencil_pass_depth_fail_op[1] = ctx->Stencil.ZFailFunc[back];
+      key->stencil_pass_depth_pass_op[1] = ctx->Stencil.ZPassFunc[back];
+      key->stencil_write_mask[1] = ctx->Stencil.WriteMask[back];
+      key->stencil_test_mask[1] = ctx->Stencil.ValueMask[back];
+   }
+
+   key->depth_test = ctx->Depth.Test;
+   if (key->depth_test) {
+      key->depth_func = ctx->Depth.Func;
+      key->depth_write = ctx->Depth.Mask;
+   }
+}
+
+/**
+ * Creates the state cache entry for the given DEPTH_STENCIL_STATE state key.
+ */
+static dri_bo *
+depth_stencil_state_create_from_key(struct brw_context *brw,
+				    struct brw_depth_stencil_state_key *key)
+{
+   struct gen6_depth_stencil_state ds;
+   dri_bo *bo;
+
+   memset(&ds, 0, sizeof(ds));
+
+   /* _NEW_STENCIL */
+   if (key->stencil) {
+      ds.ds0.stencil_enable = 1;
+      ds.ds0.stencil_func =
+	 intel_translate_compare_func(key->stencil_func[0]);
+      ds.ds0.stencil_fail_op =
+	 intel_translate_stencil_op(key->stencil_fail_op[0]);
+      ds.ds0.stencil_pass_depth_fail_op =
+	 intel_translate_stencil_op(key->stencil_pass_depth_fail_op[0]);
+      ds.ds0.stencil_pass_depth_pass_op =
+	 intel_translate_stencil_op(key->stencil_pass_depth_pass_op[0]);
+      ds.ds1.stencil_write_mask = key->stencil_write_mask[0];
+      ds.ds1.stencil_test_mask = key->stencil_test_mask[0];
+
+      if (key->stencil_two_side) {
+	 ds.ds0.bf_stencil_enable = 1;
+	 ds.ds0.bf_stencil_func =
+	    intel_translate_compare_func(key->stencil_func[1]);
+	 ds.ds0.bf_stencil_fail_op =
+	    intel_translate_stencil_op(key->stencil_fail_op[1]);
+	 ds.ds0.bf_stencil_pass_depth_fail_op =
+	    intel_translate_stencil_op(key->stencil_pass_depth_fail_op[1]);
+	 ds.ds0.bf_stencil_pass_depth_pass_op =
+	    intel_translate_stencil_op(key->stencil_pass_depth_pass_op[1]);
+	 ds.ds1.bf_stencil_write_mask = key->stencil_write_mask[1];
+	 ds.ds1.bf_stencil_test_mask = key->stencil_test_mask[1];
+      }
+
+      /* Not really sure about this:
+       */
+      if (key->stencil_write_mask[0] ||
+	  (key->stencil_two_side && key->stencil_write_mask[1]))
+	 ds.ds0.stencil_write_enable = 1;
+   }
+
+   /* _NEW_DEPTH */
+   if (key->depth_test) {
+      ds.ds2.depth_test_enable = 1;
+      ds.ds2.depth_test_func = intel_translate_compare_func(key->depth_func);
+      ds.ds2.depth_write_enable = key->depth_write;
+   }
+
+   bo = brw_upload_cache(&brw->cache, BRW_DEPTH_STENCIL_STATE,
+			 key, sizeof(*key),
+			 NULL, 0,
+			 &ds, sizeof(ds));
+
+   return bo;
+}
+
+static void
+prepare_depth_stencil_state(struct brw_context *brw)
+{
+   struct brw_depth_stencil_state_key key;
+
+   depth_stencil_state_populate_key(brw, &key);
+
+   dri_bo_unreference(brw->cc.depth_stencil_state_bo);
+   brw->cc.depth_stencil_state_bo = brw_search_cache(&brw->cache,
+						     BRW_DEPTH_STENCIL_STATE,
+						     &key, sizeof(key),
+						     NULL, 0,
+						     NULL);
+
+   if (brw->cc.depth_stencil_state_bo == NULL)
+      brw->cc.depth_stencil_state_bo =
+	 depth_stencil_state_create_from_key(brw, &key);
+}
+
+const struct brw_tracked_state gen6_depth_stencil_state = {
+   .dirty = {
+      .mesa = _NEW_DEPTH | _NEW_STENCIL,
+      .brw = 0,
+      .cache = 0,
+   },
+   .prepare = prepare_depth_stencil_state,
+};