Add REPAIR_TIMING_MAX_PASSES_PER_ITER parameters

flow/designs/asap7/ibex/config.mk

@@ -15,3 +15,7 @@ export ENABLE_DPO = 0
 
 export TNS_END_PERCENT        = 100
 
+export FP_REPAIR_TIMING_MAX_PASSES_PER_ITER = 5
+export CTS_REPAIR_TIMING_MAX_PASSES_PER_ITER = 30
+export GRT_REPAIR_TIMING_MAX_PASSES_PER_ITER = 20
+

flow/designs/gf180/aes-hybrid/config.mk

@@ -42,3 +42,7 @@ export DESIGN_TYPE = CELL
 else
 export DESIGN_TYPE = CELL_NODEN
 endif
+
+export FP_REPAIR_TIMING_MAX_PASSES_PER_ITER=10000
+export CTS_REPAIR_TIMING_MAX_PASSES_PER_ITER=10000
+export GRT_REPAIR_TIMING_MAX_PASSES_PER_ITER=10000

flow/designs/gf180/aes/config.mk

@@ -17,3 +17,7 @@ export DESIGN_TYPE = CELL
 else
 export DESIGN_TYPE = CELL_NODEN
 endif
+
+export FP_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000
+export CTS_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000
+export GRT_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000

flow/designs/gf180/ibex/config.mk

@@ -44,3 +44,7 @@ export SDC_FILE      = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/constraint.
 
 export CORE_UTILIZATION = 45
 export PLACE_DENSITY_LB_ADDON = 0.1
+
+export FP_REPAIR_TIMING_MAX_PASSES_PER_ITER=30
+export CTS_REPAIR_TIMING_MAX_PASSES_PER_ITER=40
+export GRT_REPAIR_TIMING_MAX_PASSES_PER_ITER=30

flow/designs/nangate45/black_parrot/config.mk

@@ -39,3 +39,6 @@ export PLACE_DENSITY_LB_ADDON = 0.05
 export MACRO_PLACE_HALO    = 10 10
 export MACRO_PLACE_CHANNEL = 20 20
 export TNS_END_PERCENT     = 100
+
+export FP_REPAIR_TIMING_MAX_PASSES_PER_ITER = 5
+export GRT_REPAIR_TIMING_MAX_PASSES_PER_ITER = 30

flow/designs/nangate45/bp_fe_top/config.mk

@@ -35,3 +35,6 @@ export PLACE_DENSITY_MAX_POST_HOLD = 0.12
 export TNS_END_PERCENT        = 100
 
 export FASTROUTE_TCL = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NAME)/fastroute.tcl
+
+export CTS_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000
+export GRT_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000

flow/designs/nangate45/swerv_wrapper/config.mk

@@ -34,3 +34,7 @@ export TNS_END_PERCENT        = 100
 export FASTROUTE_TCL = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NAME)/fastroute.tcl
 
 export GPL_KEEP_OVERFLOW = 0
+
+export FP_REPAIR_TIMING_MAX_PASSES_PER_ITER=50
+export CTS_REPAIR_TIMING_MAX_PASSES_PER_ITER=50
+export GRT_REPAIR_TIMING_MAX_PASSES_PER_ITER=50

flow/designs/sky130hd/gcd/config.mk

@@ -11,3 +11,7 @@ export CORE_UTILIZATION = 40
 export TNS_END_PERCENT = 100
 export EQUIVALENCE_CHECK   ?=   1
 export REMOVE_CELLS_FOR_EQY = sky130_fd_sc_hd__tapvpwrvgnd*
+
+export FP_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000
+export CTS_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000
+export GRT_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000

flow/designs/sky130hd/microwatt/config.mk

@@ -37,3 +37,7 @@ export SETUP_SLACK_MARGIN = 0.2
 # to real SRAMs and not instantiated as flops
 export SYNTH_MEMORY_MAX_BITS ?= 42000
 
+export FP_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000
+export CTS_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000
+export GRT_REPAIR_TIMING_MAX_PASSES_PER_ITER=1000
+

flow/scripts/cts.tcl

@@ -69,7 +69,7 @@ if {![env_var_equals SKIP_CTS_REPAIR_TIMING 1]} {
       write_eqy_verilog 4_before_rsz.v
   }
 
-  repair_timing_helper
+  repair_timing_helper "cts"
 
   if {$::env(EQUIVALENCE_CHECK)} {
       run_equivalence_test

flow/scripts/floorplan.tcl

@@ -108,13 +108,13 @@ if { [env_var_equals REMOVE_ABC_BUFFERS 1] } {
   # remove buffers inserted by yosys/abc
   remove_buffers
 } else {
-  repair_timing_helper 0
+  repair_timing_helper "floorplan" 0
 }
 
 ##### Restructure for timing #########
 if { [env_var_equals RESYNTH_TIMING_RECOVER 1] } {
   repair_design_helper
-  repair_timing_helper
+  repair_timing_helper "floorplan"
   # pre restructure area/timing report (ideal clocks)
   puts "Post synth-opt area"
   report_design_area
@@ -134,7 +134,7 @@ if { [env_var_equals RESYNTH_TIMING_RECOVER 1] } {
   # post restructure area/timing report (ideal clocks)
   remove_buffers
   repair_design_helper
-  repair_timing_helper
+  repair_timing_helper "floorplan"
 
   puts "Post restructure-opt wns"
   report_worst_slack -max -digits 3

flow/scripts/global_route.tcl

@@ -67,7 +67,7 @@ proc global_route_helper {} {
     puts "Repair setup and hold violations..."
     estimate_parasitics -global_routing
 
-    repair_timing_helper
+    repair_timing_helper "grt"
 
     if { $::env(DETAILED_METRICS) } {
       report_metrics 5 "global route post repair timing"

flow/scripts/util.tcl

@@ -16,7 +16,7 @@ proc fast_route {} {
   }
 }
 
-proc repair_timing_helper { {hold_margin 1} } {
+proc repair_timing_helper { stage {hold_margin 1} } {
   set additional_args "-verbose"
   append_env_var additional_args SETUP_SLACK_MARGIN -setup_margin 1
   if {$hold_margin || $::env(HOLD_SLACK_MARGIN) < 0} {
@@ -28,6 +28,15 @@ proc repair_timing_helper { {hold_margin 1} } {
   append_env_var additional_args SKIP_BUFFER_REMOVAL -skip_buffer_removal 0
   append_env_var additional_args SKIP_LAST_GASP -skip_last_gasp 0
   append_env_var additional_args MATCH_CELL_FOOTPRINT -match_cell_footprint 0
+  if { $stage == "floorplan"} {
+    set max_passes_prefix "FP_"
+  } elseif { $stage == "cts" } {
+    set max_passes_prefix "CTS_"
+  } elseif { $stage == "grt"} {
+    set max_passes_prefix "GRT_"
+  }
+  append_env_var additional_args "${max_passes_prefix}REPAIR_TIMING_MAX_PASSES_PER_ITER" -max_passes_per_iter 1
+  puts "repair_timing [join $additional_args " "]"
   log_cmd repair_timing {*}$additional_args
 }
 

flow/scripts/variables.yaml

@@ -312,6 +312,12 @@ IO_PLACER_V:
   stages:
     - floorplan
     - place
+FP_REPAIR_TIMING_MAX_PASSES_PER_ITER:
+  description: >
+    Maximum number of repairs per iteration during repair_timing, called from floorplan.
+  default: 20
+  stages:
+    - floorplan
 GUI_TIMING:
   description: >
     Load timing information when opening GUI. For large designs, this can
@@ -708,6 +714,12 @@ CTS_CLUSTER_SIZE:
   default: 50
   stages:
     - cts
+CTS_REPAIR_TIMING_MAX_PASSES_PER_ITER:
+  description: >
+    Maximum number of repairs per iteration during repair_timing, called from CTS.
+  default: 20
+  stages:
+    - cts
 CTS_SNAPSHOT:
   description: >
     Creates ODB/SDC files prior to clock net and setup/hold repair.
@@ -739,6 +751,12 @@ GLOBAL_ROUTE_ARGS:
   stages:
     - grt
   default: -congestion_iterations 30 -congestion_report_iter_step 5 -verbose
+GRT_REPAIR_TIMING_MAX_PASSES_PER_ITER:
+  description: >
+    Maximum number of repairs per iteration during repair_timing, called from GRT.
+  default: 20
+  stages:
+    - grt
 MATCH_CELL_FOOTPRINT:
   description: >
     Enforce sizing operations to only swap cells that have the same layout