Added a density-checking script. Takes about 45 minutes to run.
diff --git a/scripts/check_density.py b/scripts/check_density.py new file mode 100755 index 0000000..76f62a3 --- /dev/null +++ b/scripts/check_density.py
@@ -0,0 +1,427 @@ +#!/usr/bin/env python3 +# SPDX-FileCopyrightText: 2020 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. +# SPDX-License-Identifier: Apache-2.0 + +# +# check_density.py --- +# +# Run density checks on the final (filled) GDS. +# + +import sys +import os +import re +import select +import subprocess + +def usage(): + print("Usage:") + print("check_density.py [<path_to_project>] [-keep]") + print("") + print("where:") + print(" <path_to_project> is the path to the project top level directory.") + print("") + print(" If <path_to_project> is not given, then it is assumed to be the cwd.") + print(" If '-keep' is specified, then keep the check script.") + return 0 + + +if __name__ == '__main__': + + optionlist = [] + arguments = [] + + debugmode = False + keepmode = False + + for option in sys.argv[1:]: + if option.find('-', 0) == 0: + optionlist.append(option) + else: + arguments.append(option) + + if len(arguments) > 1: + print("Wrong number of arguments given to check_density.py.") + usage() + sys.exit(0) + + if len(arguments) == 1: + user_project_path = arguments[0] + else: + user_project_path = os.getcwd() + + # Check for valid user path + + if not os.path.isdir(user_project_path): + print('Error: Project path "' + user_project_path + '" does not exist or is not readable.') + sys.exit(1) + + # Check for valid user ID + user_id_value = None + if os.path.isfile(user_project_path + '/info.yaml'): + with open(user_project_path + '/info.yaml', 'r') as ifile: + infolines = ifile.read().splitlines() + for line in infolines: + kvpair = line.split(':') + if len(kvpair) == 2: + key = kvpair[0].strip() + value = kvpair[1].strip() + if key == 'project_id': + user_id_value = value.strip('"\'') + break + + if user_id_value: + project = 'caravel' + project_with_id = 'caravel_' + user_id_value + else: + print('Error: No project_id found in info.yaml file.') + sys.exit(1) + + if '-debug' in optionlist: + debugmode = True + if '-keep' in optionlist: + keepmode = True + + magpath = user_project_path + '/mag' + rcfile = magpath + '/.magicrc' + + with open(magpath + '/check_density.tcl', 'w') as ofile: + print('#!/bin/env wish', file=ofile) + print('crashbackups stop', file=ofile) + print('drc off', file=ofile) + print('snap internal', file=ofile) + + print('set starttime [orig_clock format [orig_clock seconds] -format "%D %T"]', file=ofile) + print('puts stdout "Started reading GDS: $starttime"', file=ofile) + print('', file=ofile) + print('flush stdout', file=ofile) + print('update idletasks', file=ofile) + + # Read final project from .gds + print('gds readonly true', file=ofile) + print('gds rescale false', file=ofile) + print('gds read ../gds/' + project_with_id + '.gds', file=ofile) + print('', file=ofile) + + print('set midtime [orig_clock format [orig_clock seconds] -format "%D %T"]', file=ofile) + print('puts stdout "Starting density checks: $midtime"', file=ofile) + print('', file=ofile) + print('flush stdout', file=ofile) + print('update idletasks', file=ofile) + + # Get step box dimensions (700um for size and 70um for step) + print('box values 0 0 0 0', file=ofile) + # print('box size 700um 700um', file=ofile) + # print('set stepbox [box values]', file=ofile) + # print('set stepwidth [lindex $stepbox 2]', file=ofile) + # print('set stepheight [lindex $stepbox 3]', file=ofile) + + print('box size 70um 70um', file=ofile) + print('set stepbox [box values]', file=ofile) + print('set stepsizex [lindex $stepbox 2]', file=ofile) + print('set stepsizey [lindex $stepbox 3]', file=ofile) + + print('select top cell', file=ofile) + print('expand', file=ofile) + print('set fullbox [box values]', file=ofile) + print('set xmax [lindex $fullbox 2]', file=ofile) + print('set xmin [lindex $fullbox 0]', file=ofile) + print('set fullwidth [expr {$xmax - $xmin}]', file=ofile) + print('set xtiles [expr {int(ceil(($fullwidth + 0.0) / $stepsizex))}]', file=ofile) + print('set ymax [lindex $fullbox 3]', file=ofile) + print('set ymin [lindex $fullbox 1]', file=ofile) + print('set fullheight [expr {$ymax - $ymin}]', file=ofile) + print('set ytiles [expr {int(ceil(($fullheight + 0.0) / $stepsizey))}]', file=ofile) + print('box size $stepsizex $stepsizey', file=ofile) + print('set xbase [lindex $fullbox 0]', file=ofile) + print('set ybase [lindex $fullbox 1]', file=ofile) + print('', file=ofile) + + print('puts stdout "XTILES: $xtiles"', file=ofile) + print('puts stdout "YTILES: $ytiles"', file=ofile) + print('', file=ofile) + + print('cif ostyle density', file=ofile) + + # Process density at steps. For efficiency, this is done in 70x70 um + # areas, dumped to a file, and then aggregated into the 700x700 areas. + + print('for {set y 0} {$y < $ytiles} {incr y} {', file=ofile) + print(' for {set x 0} {$x < $xtiles} {incr x} {', file=ofile) + print(' set xlo [expr $xbase + $x * $stepsizex]', file=ofile) + print(' set ylo [expr $ybase + $y * $stepsizey]', file=ofile) + print(' set xhi [expr $xlo + $stepsizex]', file=ofile) + print(' set yhi [expr $ylo + $stepsizey]', file=ofile) + print(' box values $xlo $ylo $xhi $yhi', file=ofile) + + # Flatten this area + print(' flatten -dobbox -nolabels tile', file=ofile) + print(' load tile', file=ofile) + print(' select top cell', file=ofile) + + # Run density check for each layer + print(' puts stdout "Density results for tile x=$x y=$y"', file=ofile) + + print(' set fdens [cif list cover fom_all]', file=ofile) + print(' set pdens [cif list cover poly_all]', file=ofile) + print(' set ldens [cif list cover li_all]', file=ofile) + print(' set m1dens [cif list cover m1_all]', file=ofile) + print(' set m2dens [cif list cover m2_all]', file=ofile) + print(' set m3dens [cif list cover m3_all]', file=ofile) + print(' set m4dens [cif list cover m4_all]', file=ofile) + print(' set m5dens [cif list cover m5_all]', file=ofile) + print(' puts stdout "FOM: $fdens"', file=ofile) + print(' puts stdout "POLY: $pdens"', file=ofile) + print(' puts stdout "LI1: $ldens"', file=ofile) + print(' puts stdout "MET1: $m1dens"', file=ofile) + print(' puts stdout "MET2: $m2dens"', file=ofile) + print(' puts stdout "MET3: $m3dens"', file=ofile) + print(' puts stdout "MET4: $m4dens"', file=ofile) + print(' puts stdout "MET5: $m5dens"', file=ofile) + print(' flush stdout', file=ofile) + print(' update idletasks', file=ofile) + + print(' load ' + project_with_id, file=ofile) + print(' cellname delete tile', file=ofile) + + print(' }', file=ofile) + print('}', file=ofile) + + print('set endtime [orig_clock format [orig_clock seconds] -format "%D %T"]', file=ofile) + print('puts stdout "Ended: $endtime"', file=ofile) + print('', file=ofile) + + + myenv = os.environ.copy() + # Real views are necessary for the DRC checks + myenv['MAGTYPE'] = 'mag' + + print('Running density checks on file ' + project_with_id + '.gds', flush=True) + + mproc = subprocess.Popen(['magic', '-dnull', '-noconsole', + '-rcfile', rcfile, magpath + '/check_density.tcl'], + stdin = subprocess.DEVNULL, + stdout = subprocess.PIPE, + stderr = subprocess.PIPE, + cwd = magpath, + env = myenv, + universal_newlines = True) + + # Use signal to poll the process and generate any output as it arrives + + fomfill = [] + polyfill = [] + lifill = [] + met1fill = [] + met2fill = [] + met3fill = [] + met4fill = [] + met5fill = [] + + while mproc: + status = mproc.poll() + if status != None: + try: + output = mproc.communicate(timeout=1) + except ValueError: + print('Magic forced stop, status ' + str(status)) + sys.exit(1) + else: + outlines = output[0] + errlines = output[1] + for line in outlines.splitlines(): + print(line) + dpair = line.split(':') + if len(dpair) == 2: + layer = dpair[0] + try: + density = float(dpair[1].strip()) + except: + continue + if layer == 'FOM': + fomfill.append(density) + elif layer == 'POLY': + polyfill.append(density) + elif layer == 'LI1': + lifill.append(density) + elif layer == 'MET1': + met1fill.append(density) + elif layer == 'MET2': + met2fill.append(density) + elif layer == 'MET3': + met3fill.append(density) + elif layer == 'MET4': + met4fill.append(density) + elif layer == 'MET5': + met5fill.append(density) + elif layer == 'XTILES': + xtiles = int(dpair[1].strip()) + elif layer == 'YTILES': + ytiles = int(dpair[1].strip()) + + for line in errlines.splitlines(): + print(line) + print('Magic exited with status ' + str(status)) + if int(status) != 0: + sys.exit(int(status)) + else: + break + else: + n = 0 + while True: + n += 1 + if n > 100: + n = 0 + status = mproc.poll() + if status != None: + break + sresult = select.select([mproc.stdout, mproc.stderr], [], [], 0)[0] + if mproc.stdout in sresult: + outstring = mproc.stdout.readline().strip() + print(outstring) + elif mproc.stderr in sresult: + outstring = mproc.stderr.readline().strip() + print(outstring) + else: + break + + total_tiles = (ytiles - 9) * (xtiles - 9) + + print('') + print('Density results (total tiles = ' + str(total_tiles) + '):') + + print('') + print('FOM Density:') + for y in range(0, ytiles - 9): + for x in range(0, xtiles - 9): + fomaccum = 0 + for w in range(y, y + 10): + base = xtiles * w + x + fomaccum += sum(fomfill[base : base + 10]) + + print('Tile (' + str(x) + ', ' + str(y) + '): ' + str(fomaccum / 100.0)) + if fomaccum < 33.0: + print('***Error: FOM Density < 33%') + elif fomaccum > 57.0: + print('***Error: FOM Density > 57%') + + print('') + print('POLY Density:') + for y in range(0, ytiles - 9): + for x in range(0, xtiles - 9): + polyaccum = 0 + for w in range(y, y + 10): + base = xtiles * w + x + polyaccum += sum(polyfill[base : base + 10]) + + print('Tile (' + str(x) + ', ' + str(y) + '): ' + str(polyaccum / 100.0)) + + print('') + print('LI Density:') + for y in range(0, ytiles - 9): + for x in range(0, xtiles - 9): + liaccum = 0 + for w in range(y, y + 10): + base = xtiles * w + x + liaccum += sum(lifill[base : base + 10]) + + print('Tile (' + str(x) + ', ' + str(y) + '): ' + str(liaccum / 100.0)) + if liaccum < 35.0: + print('***Error: LI Density < 35%') + elif liaccum > 70.0: + print('***Error: LI Density > 70%') + + print('') + print('MET1 Density:') + for y in range(0, ytiles - 9): + for x in range(0, xtiles - 9): + met1accum = 0 + for w in range(y, y + 10): + base = xtiles * w + x + met1accum += sum(met1fill[base : base + 10]) + + print('Tile (' + str(x) + ', ' + str(y) + '): ' + str(met1accum / 100.0)) + if met1accum < 35.0: + print('***Error: MET1 Density < 35%') + elif met1accum > 70.0: + print('***Error: MET1 Density > 70%') + + print('') + print('MET2 Density:') + for y in range(0, ytiles - 9): + for x in range(0, xtiles - 9): + met2accum = 0 + for w in range(y, y + 10): + base = xtiles * w + x + met2accum += sum(met2fill[base : base + 10]) + + print('Tile (' + str(x) + ', ' + str(y) + '): ' + str(met2accum / 100.0)) + if met2accum < 35.0: + print('***Error: MET2 Density < 35%') + elif met2accum > 70.0: + print('***Error: MET2 Density > 70%') + + print('') + print('MET3 Density:') + for y in range(0, ytiles - 9): + for x in range(0, xtiles - 9): + met3accum = 0 + for w in range(y, y + 10): + base = xtiles * w + x + met3accum += sum(met3fill[base : base + 10]) + + print('Tile (' + str(x) + ', ' + str(y) + '): ' + str(met3accum / 100.0)) + if met3accum < 35.0: + print('***Error: MET3 Density < 35%') + elif met3accum > 70.0: + print('***Error: MET3 Density > 70%') + + print('') + print('MET4 Density:') + for y in range(0, ytiles - 9): + for x in range(0, xtiles - 9): + met4accum = 0 + for w in range(y, y + 10): + base = xtiles * w + x + met4accum += sum(met4fill[base : base + 10]) + + print('Tile (' + str(x) + ', ' + str(y) + '): ' + str(met4accum / 100.0)) + if met4accum < 35.0: + print('***Error: MET4 Density < 35%') + elif met4accum > 70.0: + print('***Error: MET4 Density > 70%') + + print('') + print('MET5 Density:') + for y in range(0, ytiles - 9): + for x in range(0, xtiles - 9): + met5accum = 0 + for w in range(y, y + 10): + base = xtiles * w + x + met5accum += sum(met5fill[base : base + 10]) + + print('Tile (' + str(x) + ', ' + str(y) + '): ' + str(met5accum / 100.0)) + if met5accum < 45.0: + print('***Error: MET5 Density < 45%') + elif met5accum > 86.0: + print('***Error: MET5 Density > 80%') + + if not keepmode: + os.remove(magpath + '/check_density.tcl') + + print('') + print('Done!') + sys.exit(0) +