Add repair_design for global routing (#1670)

\+ Add run_resizer_design_routing before run_resizer_timing_routing
Co-authored-by: kareefardi <kareem.farid@efabless.com>

configuration/routing.tcl

@@ -40,6 +40,7 @@ set ::env(DRT_OPT_ITERS) 64
 # GLB Resizer
 set ::env(GLB_OPTIMIZE_MIRRORING) 1
 set ::env(GLB_RESIZER_TIMING_OPTIMIZATIONS) 1
+set ::env(GLB_RESIZER_DESIGN_OPTIMIZATIONS) 1
 set ::env(GLB_RESIZER_MAX_WIRE_LENGTH) 0
 set ::env(GLB_RESIZER_MAX_SLEW_MARGIN) 10
 set ::env(GLB_RESIZER_MAX_CAP_MARGIN) 10

designs/caravel_upw/config.tcl

@@ -120,6 +120,8 @@ set ::env(PL_RESIZER_TIMING_OPTIMIZATIONS) 0
 set ::env(PL_RESIZER_BUFFER_INPUT_PORTS) 0
 set ::env(PL_RESIZER_BUFFER_OUTPUT_PORTS) 0
 
+set ::env(GLB_RESIZER_DESIGN_OPTIMIZATIONS) 0
+
 set ::env(FP_PDN_ENABLE_RAILS) 0
 
 set ::env(DIODE_INSERTION_STRATEGY) 0

docs/source/reference/configuration.md

@@ -206,6 +206,7 @@ These variables worked initially, but they were too sky130 specific and will be
 | `RT_CLOCK_MIN_LAYER` | The name of lowest layer to be used in routing the clock net. <br> (Default: `RT_MIN_LAYER`)|
 | `RT_CLOCK_MAX_LAYER` | The name of highest layer to be used in routing the clock net. <br> (Default: `RT_MAX_LAYER`)|
 | `GLB_RESIZER_TIMING_OPTIMIZATIONS` | Specifies whether resizer timing optimizations should be performed after global routing or not. 0 = false, 1 = true <br> (Default: `1`)
+| `GLB_RESIZER_DESIGN_OPTIMIZATIONS` | Specifies whether resizer design optimizations should be performed after global routing or not. 0 = false, 1 = true <br> (Default: `1`)
 | `GLB_RESIZER_MAX_WIRE_LENGTH` | Specifies the maximum wire length cap used by resizer to insert buffers. If set to 0, no buffers will be inserted. Value in microns. <br> (Default: `0`)|
 | `GLB_RESIZER_MAX_SLEW_MARGIN` | Specifies a margin for the slews. <br> (Default: `10`)|
 | `GLB_RESIZER_MAX_CAP_MARGIN` | Specifies a margin for the capacitances. <br> (Default: `10`)|

scripts/openroad/resizer_routing_design.tcl

@@ -0,0 +1,78 @@
+# Copyright 2020-2022 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 $::env(SCRIPTS_DIR)/openroad/common/io.tcl
+read -override_libs "$::env(RSZ_LIB)"
+
+set_propagated_clock [all_clocks]
+
+# set don't touch nets
+source $::env(SCRIPTS_DIR)/openroad/common/resizer.tcl
+set_dont_touch_rx "$::env(RSZ_DONT_TOUCH_RX)"
+
+# set don't use cells
+if { [info exists ::env(DONT_USE_CELLS)] } {
+    set_dont_use $::env(DONT_USE_CELLS)
+}
+
+source $::env(SCRIPTS_DIR)/openroad/common/set_routing_layers.tcl
+
+source $::env(SCRIPTS_DIR)/openroad/common/set_layer_adjustments.tcl
+
+set arg_list [list]
+lappend arg_list -congestion_iterations $::env(GRT_OVERFLOW_ITERS)
+lappend arg_list -verbose
+if { $::env(GRT_ALLOW_CONGESTION) == 1 } {
+    lappend arg_list -allow_congestion
+}
+puts $arg_list
+global_route {*}$arg_list
+
+# set rc values
+source $::env(SCRIPTS_DIR)/openroad/common/set_rc.tcl
+
+# estimate wire rc parasitics
+estimate_parasitics -global_routing
+
+# Resize
+
+set arg_list [list]
+lappend arg_list -slew_margin $::env(GLB_RESIZER_MAX_SLEW_MARGIN)
+lappend arg_list -cap_margin $::env(GLB_RESIZER_MAX_CAP_MARGIN)
+if { [info exists ::env(GLB_RESIZER_MAX_WIRE_LENGTH)] \
+    && $::env(GLB_RESIZER_MAX_WIRE_LENGTH) } {
+    lappend -max_wire_length $::env(GLB_RESIZER_MAX_WIRE_LENGTH)
+}
+repair_design {*}$arg_list
+
+source $::env(SCRIPTS_DIR)/openroad/common/dpl_cell_pad.tcl
+
+detailed_placement
+
+if { $::env(GLB_OPTIMIZE_MIRRORING) } {
+    optimize_mirroring
+}
+
+if { [catch {check_placement -verbose} errmsg] } {
+    puts stderr $errmsg
+    exit 1
+}
+
+unset_dont_touch_rx "$::env(RSZ_DONT_TOUCH_RX)"
+
+write
+
+# Run post timing optimizations STA
+estimate_parasitics -global_routing
+set ::env(RUN_STANDALONE) 0
+source $::env(SCRIPTS_DIR)/openroad/sta.tcl

scripts/tcl_commands/routing.tcl

@@ -385,6 +385,7 @@ proc run_routing {args} {
     # |----------------   5. ROUTING ----------------------|
     # |----------------------------------------------------|
 
+    run_resizer_design_routing
     run_resizer_timing_routing
     if { $::env(RSZ_USE_OLD_REMOVER) == 1} {
         remove_buffers_from_nets
@@ -444,15 +445,34 @@ proc run_routing {args} {
     set ::env(timer_routed) [clock seconds]
 }
 
+proc run_resizer_design_routing {args} {
+    if { $::env(GLB_RESIZER_DESIGN_OPTIMIZATIONS) == 1} {
+        increment_index
+        TIMER::timer_start
+        set log [index_file $::env(routing_logs)/resizer_design.log]
+        puts_info "Running Global Routing Resizer Design Optimizations (log: [relpath . $log])..."
+
+        run_openroad_script $::env(SCRIPTS_DIR)/openroad/resizer_routing_design.tcl\
+            -indexed_log $log\
+            -save "dir=$::env(routing_tmpfiles),def,sdc,odb,netlist,powered_netlist"
+
+        TIMER::timer_stop
+        exec echo "[TIMER::get_runtime]" | python3 $::env(SCRIPTS_DIR)/write_runtime.py "resizer design optimizations - openroad"
+
+    } else {
+        puts_info "Skipping Global Routing Resizer Design Optimizations."
+    }
+}
+
 proc run_resizer_timing_routing {args} {
     if { $::env(GLB_RESIZER_TIMING_OPTIMIZATIONS) == 1} {
         increment_index
         TIMER::timer_start
-        set log [index_file $::env(routing_logs)/resizer.log]
+        set log [index_file $::env(routing_logs)/resizer_timing.log]
         puts_info "Running Global Routing Resizer Timing Optimizations (log: [relpath . $log])..."
 
         run_openroad_script $::env(SCRIPTS_DIR)/openroad/resizer_routing_timing.tcl\
-            -indexed_log [index_file $::env(routing_logs)/resizer.log]\
+            -indexed_log $log\
             -save "dir=$::env(routing_tmpfiles),def,sdc,odb,netlist,powered_netlist"
 
         TIMER::timer_stop