1#!/bin/bash
  2# SPDX-License-Identifier: GPL-2.0
  3
  4# protect against multiple inclusion
  5if [ $FILE_CPUFREQ ]; then
  6	return 0
  7else
  8	FILE_CPUFREQ=DONE
  9fi
 10
 11source cpu.sh
 12
 13
 14# $1: cpu
 15cpu_should_have_cpufreq_directory()
 16{
 17	if [ ! -d $CPUROOT/$1/cpufreq ]; then
 18		printf "Warning: No cpufreq directory present for $1\n"
 19	fi
 20}
 21
 22cpu_should_not_have_cpufreq_directory()
 23{
 24	if [ -d $CPUROOT/$1/cpufreq ]; then
 25		printf "Warning: cpufreq directory present for $1\n"
 26	fi
 27}
 28
 29for_each_policy()
 30{
 31	policies=$(ls $CPUFREQROOT| grep "policy[0-9].*")
 32	for policy in $policies; do
 33		$@ $policy
 34	done
 35}
 36
 37for_each_policy_concurrent()
 38{
 39	policies=$(ls $CPUFREQROOT| grep "policy[0-9].*")
 40	for policy in $policies; do
 41		$@ $policy &
 42	done
 43}
 44
 45# $1: Path
 46read_cpufreq_files_in_dir()
 47{
 48	local files=`ls $1`
 49
 50	printf "Printing directory: $1\n\n"
 51
 52	for file in $files; do
 53		if [ -f $1/$file ]; then
 54			printf "$file:"
 55			cat $1/$file
 56		else
 57			printf "\n"
 58			read_cpufreq_files_in_dir "$1/$file"
 59		fi
 60	done
 61	printf "\n"
 62}
 63
 64
 65read_all_cpufreq_files()
 66{
 67	printf "** Test: Running ${FUNCNAME[0]} **\n\n"
 68
 69	read_cpufreq_files_in_dir $CPUFREQROOT
 70
 71	printf "%s\n\n" "------------------------------------------------"
 72}
 73
 74
 75# UPDATE CPUFREQ FILES
 76
 77# $1: directory path
 78update_cpufreq_files_in_dir()
 79{
 80	local files=`ls $1`
 81
 82	printf "Updating directory: $1\n\n"
 83
 84	for file in $files; do
 85		if [ -f $1/$file ]; then
 86			# file is writable ?
 87			local wfile=$(ls -l $1/$file | awk '$1 ~ /^.*w.*/ { print $NF; }')
 88
 89			if [ ! -z $wfile ]; then
 90				# scaling_setspeed is a special file and we
 91				# should skip updating it
 92				if [ $file != "scaling_setspeed" ]; then
 93					local val=$(cat $1/$file)
 94					printf "Writing $val to: $file\n"
 95					echo $val > $1/$file
 96				fi
 97			fi
 98		else
 99			printf "\n"
100			update_cpufreq_files_in_dir "$1/$file"
101		fi
102	done
103
104	printf "\n"
105}
106
107# Update all writable files with their existing values
108update_all_cpufreq_files()
109{
110	printf "** Test: Running ${FUNCNAME[0]} **\n\n"
111
112	update_cpufreq_files_in_dir $CPUFREQROOT
113
114	printf "%s\n\n" "------------------------------------------------"
115}
116
117
118# CHANGE CPU FREQUENCIES
119
120# $1: policy
121find_current_freq()
122{
123	cat $CPUFREQROOT/$1/scaling_cur_freq
124}
125
126# $1: policy
127# $2: frequency
128set_cpu_frequency()
129{
130	printf "Change frequency for $1 to $2\n"
131	echo $2 > $CPUFREQROOT/$1/scaling_setspeed
132}
133
134# $1: policy
135test_all_frequencies()
136{
137	local filepath="$CPUFREQROOT/$1"
138
139	backup_governor $1
140
141	local found=$(switch_governor $1 "userspace")
142	if [ $found = 1 ]; then
143		printf "${FUNCNAME[0]}: userspace governor not available for: $1\n"
144		return;
145	fi
146
147	printf "Switched governor for $1 to userspace\n\n"
148
149	local freqs=$(cat $filepath/scaling_available_frequencies)
150	printf "Available frequencies for $1: $freqs\n\n"
151
152	# Set all frequencies one-by-one
153	for freq in $freqs; do
154		set_cpu_frequency $1 $freq
155	done
156
157	printf "\n"
158
159	restore_governor $1
160}
161
162# $1: loop count
163shuffle_frequency_for_all_cpus()
164{
165	printf "** Test: Running ${FUNCNAME[0]} for $1 loops **\n\n"
166
167	for i in `seq 1 $1`; do
168		for_each_policy test_all_frequencies
169	done
170	printf "\n%s\n\n" "------------------------------------------------"
171}
172
173# Basic cpufreq tests
174cpufreq_basic_tests()
175{
176	printf "*** RUNNING CPUFREQ SANITY TESTS ***\n"
177	printf "====================================\n\n"
178
179	count=$(count_cpufreq_managed_cpus)
180	if [ $count = 0 ]; then
181		printf "No cpu is managed by cpufreq core, exiting\n"
182		exit;
183	else
184		printf "CPUFreq manages: $count CPUs\n\n"
185	fi
186
187	# Detect & print which CPUs are not managed by cpufreq
188	print_unmanaged_cpus
189
190	# read/update all cpufreq files
191	read_all_cpufreq_files
192	update_all_cpufreq_files
193
194	# hotplug cpus
195	reboot_cpus 5
196
197	# Test all frequencies
198	shuffle_frequency_for_all_cpus 2
199
200	# Test all governors
201	shuffle_governors_for_all_cpus 1
202}
203
204# Suspend/resume
205# $1: "suspend" or "hibernate", $2: loop count
206do_suspend()
207{
208	printf "** Test: Running ${FUNCNAME[0]}: Trying $1 for $2 loops **\n\n"
209
210	# Is the directory available
211	if [ ! -d $SYSFS/power/ -o ! -f $SYSFS/power/state ]; then
212		printf "$SYSFS/power/state not available\n"
213		return 1
214	fi
215
216	if [ $1 = "suspend" ]; then
217		filename="mem"
218	elif [ $1 = "hibernate" ]; then
219		filename="disk"
220	else
221		printf "$1 is not a valid option\n"
222		return 1
223	fi
224
225	if [ -n $filename ]; then
226		present=$(cat $SYSFS/power/state | grep $filename)
227
228		if [ -z "$present" ]; then
229			printf "Tried to $1 but $filename isn't present in $SYSFS/power/state\n"
230			return 1;
231		fi
232
233		for i in `seq 1 $2`; do
234			printf "Starting $1\n"
235			echo $filename > $SYSFS/power/state
236			printf "Came out of $1\n"
237
238			printf "Do basic tests after finishing $1 to verify cpufreq state\n\n"
239			cpufreq_basic_tests
240		done
241	fi
242}