1#! /bin/sh
2#
3# Copyright (c) International Business Machines  Corp., 2001
4# Author: Nageswara R Sastry <nasastry@in.ibm.com>
5#
6# This program is free software;  you can redistribute it and#or modify
7# it under the terms of the GNU General Public License as published by
8# the Free Software Foundation; either version 2 of the License, or
9# (at your option) any later version.
10#
11# This program is distributed in the hope that it will be useful, but
12# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14# for more details.
15#
16# You should have received a copy of the GNU General Public License
17# along with this program;  if not, write to the Free Software Foundation,
18# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19#
20
21export TCID="Power_Management03"
22export TST_TOTAL=4
23
24. test.sh
25. pm_include.sh
26
27check_cpufreq_sysfs_files() {
28	total_cpus=$(tst_ncpus)
29	(( total_cpus-=1 ))
30	RC=0
31
32	for cpu in $(seq 0 "${total_cpus}" )
33	do
34		cpufiles=$(find /sys/devices/system/cpu/cpu"${cpu}"/cpufreq/ \
35			-name "*" -type f)
36		for files in ${cpufiles}
37		do
38			cat ${files} >/dev/null 2>&1
39			if [ $? -ne 0 ] ; then
40				echo "${0}: FAIL: cat ${files}"
41				RC=1
42			fi
43		done
44	done
45	if [ ${RC} -eq 0 ] ; then
46		echo "${0}: PASS: Checking cpu freq sysfs files"
47	fi
48	return $RC
49}
50
51change_govr() {
52	available_govr=$(get_supporting_govr)
53
54	total_cpus=$(tst_ncpus)
55	(( total_cpus-=1 ))
56	RC=0
57
58	for cpu in $(seq 0 "${total_cpus}" )
59	do
60		for govr in ${available_govr}
61		do
62			echo ${govr} > \
63	/sys/devices/system/cpu/cpu${cpu}/cpufreq/scaling_governor
64			if [ "$?" -ne "0" ] ; then
65				echo "${0}: FAIL: Unable to set" \
66					"governor -- ${govr} for cpu${cpu}"
67				RC=1
68			fi
69		done
70	done
71	if [ ${RC} -eq 0 ] ; then
72		echo "${0}: PASS: Changing cpu governors"
73	fi
74	return $RC
75}
76
77change_freq() {
78	available_freq=$(get_supporting_freq)
79	available_govr=$(get_supporting_govr)
80	RC=0
81
82	total_cpus=$(tst_ncpus)
83	(( total_cpus-=1 ))
84
85	if ( echo ${available_govr} | grep -i "userspace" \
86		>/dev/null 2>&1 ); then
87		for cpu in $(seq 0 "${total_cpus}" )
88		do
89			echo userspace > \
90	/sys/devices/system/cpu/cpu${cpu}/cpufreq/scaling_governor
91			if [ $? -ne 0 ] ; then
92				RC=1
93			fi
94		done
95		if [ ${RC} -ne 1 ] ; then
96			for cpu in $(seq 0 "${total_cpus}" )
97			do
98				for freq in ${available_freq}
99				do
100					echo ${freq} > \
101	/sys/devices/system/cpu/cpu${cpu}/cpufreq/scaling_setspeed
102					if [ "$?" -ne "0" ] ; then
103						echo "${0}: FAIL: Unable" \
104							"to set frequency -- ${freq} for cpu${cpu}"
105						RC=1
106					fi
107				done
108			done
109		fi
110	fi
111	if [ ${RC} -eq 0 ] ; then
112		echo "${0}: PASS: Changing cpu frequencies"
113	fi
114	return $RC
115}
116
117pwkm_load_unload() {
118	RC=0
119	loaded_governor=`cat \
120		/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor`
121	for module in `modprobe -l | grep cpufreq_ | \
122		cut -f8 -d"/" | cut -f1 -d"."`
123	do
124		#echo -n "Loading $module ... "
125		if [ $module != "cpufreq_$loaded_governor" ]; then
126			modprobe $module >/dev/null
127			if [ $? -ne 0 ] ; then
128				echo "${0}: FAIL: Loading of module $module" \
129					"or check whether you compiled as module or not"
130				RC=1
131			fi
132		fi
133	done
134	for module in `modprobe -l | grep cpufreq_ | \
135		cut -f8 -d"/" | cut -f1 -d"."`
136		do
137		#echo -n "Unloading $module ... "
138		if [ $module != "cpufreq_$loaded_governor" ]; then
139			modprobe -r $module >/dev/null
140			if [ $? -ne 0 ] ; then
141				echo "${0}: FAIL: Loading of module $module" \
142					"or check whether you compiled as module or not"
143				RC=1
144			fi
145		fi
146	done
147	return $RC
148}
149
150# Checking test environment
151check_kervel_arch
152
153# Checking cpufreq sysfs interface files
154if [ ! -d /sys/devices/system/cpu/cpu0/cpufreq ] ; then
155	tst_brkm TCONF "Required kernel configuration for CPU_FREQ NOT set"
156fi
157
158if check_cpufreq_sysfs_files ; then
159	tst_resm TPASS "CPUFREQ sysfs tests"
160else
161	tst_resm TFAIL "CPUFREQ sysfs tests"
162fi
163
164# Changing governors
165if change_govr ; then
166	tst_resm TPASS "Changing governors"
167else
168	tst_resm TFAIL "Changing governors"
169fi
170
171# Changing frequencies
172if change_freq ; then
173	tst_resm TPASS "Changing frequncies"
174else
175    tst_resm TFAIL "Changing frequncies"
176fi
177
178# Loading and Unloading governor related kernel modules
179if pwkm_load_unload ; then
180	tst_resm TPASS "Loading and Unloading of governor kernel" \
181		"modules"
182else
183	tst_resm TFAIL "Loading and Unloading of governor kernel" \
184		"modules got failed"
185fi
186
187tst_exit
188