feat: post-drt antenna repair

openlane/flows/classic.py

@@ -87,6 +87,7 @@ class Classic(SequentialFlow):
         OpenROAD.ResizerTimingPostGRT,
         OpenROAD.STAMidPNR,
         OpenROAD.DetailedRouting,
+        OpenROAD.RepairAntennasPostDRT,
         Odb.RemoveRoutingObstructions,
         OpenROAD.CheckAntennas,
         Checker.TrDRC,
@@ -176,6 +177,12 @@ class Classic(SequentialFlow):
             default=True,
             deprecated_names=["GRT_REPAIR_ANTENNAS"],
         ),
+        Variable(
+            "RUN_POST_DRT_ANTENNA_REPAIR",
+            bool,
+            "Enables the OpenROAD.RepairAntennasPostDRT step.",
+            default=False,
+        ),
         Variable(
             "RUN_DRT",
             bool,
@@ -277,6 +284,7 @@ class Classic(SequentialFlow):
         "OpenROAD.TapEndcapInsertion": ["RUN_TAP_ENDCAP_INSERTION"],
         "Odb.HeuristicDiodeInsertion": ["RUN_HEURISTIC_DIODE_INSERTION"],
         "OpenROAD.RepairAntennas": ["RUN_ANTENNA_REPAIR"],
+        "OpenROAD.RepairAntennasPostDRT": ["RUN_POST_DRT_ANTENNA_REPAIR"],
         "OpenROAD.DetailedRouting": ["RUN_DRT"],
         "OpenROAD.FillInsertion": ["RUN_FILL_INSERTION"],
         "OpenROAD.STAPostPNR": ["RUN_MCSTA"],

openlane/scripts/openroad/antenna_repair_post_drt.tcl

@@ -0,0 +1,24 @@
+# Copyright 2020-2024 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+source $::env(SCRIPTS_DIR)/openroad/common/io.tcl
+read_current_odb
+
+source $::env(SCRIPTS_DIR)/openroad/common/set_routing_layers.tcl
+source $::env(SCRIPTS_DIR)/openroad/common/set_layer_adjustments.tcl
+
+set diode_split [split $::env(DIODE_CELL) "/"]
+repair_antennas "[lindex $diode_split 0]" -ratio_margin $::env(DRT_ANTENNA_MARGIN)
+
+write_views
+history

openlane/steps/openroad.py

@@ -1620,6 +1620,40 @@ def run(self, state_in: State, **kwargs) -> Tuple[ViewsUpdate, MetricsUpdate]:
         return super().run(state_in, env=env, **kwargs)
 
 
+class _DiodeInsertionPostDRT(OpenROADStep):
+    id = "DiodeInsertion"
+
+    config_vars = (
+        OpenROADStep.config_vars
+        + dpl_variables
+        + grt_variables
+        + [
+            Variable(
+                "DRT_ANTENNA_MARGIN",
+                int,
+                "The margin to over fix antenna violations.",
+                default=10,
+                units="%",
+            ),
+        ]
+    )
+
+    def get_script_path(self):
+        return os.path.join(get_script_dir(), "openroad", "antenna_repair_post_drt.tcl")
+
+
+@Step.factory.register()
+class RepairAntennasPostDRT(CompositeStep):
+    """
+    Similar to `OpenROAD.RepairAntennas`, but runs after detailed routing.
+    """
+
+    id = "OpenROAD.RepairAntennasPostDRT"
+    name = "Antenna Repair Post Detailed Routing"
+
+    Steps = [_DiodeInsertionPostDRT, DetailedRouting, CheckAntennas]
+
+
 @Step.factory.register()
 class LayoutSTA(OpenROADStep):
     """