1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * AMD Processor P-state Frequency Driver Unit Test
9  * The AMD P-State Unit Test is a test module for testing the amd-pstate
11  * (SBIOS/Firmware or Hardware). 2) Kernel can have a basic function
12  * test to avoid the kernel regression during the update. 3) We can
19  * See Documentation/admin-guide/pm/amd-pstate.rst Unit Tests for
20  * amd-pstate to get more detail.
25 #include <linux/kernel.h>
32 #include "amd-pstate.h"
36  * amd_pstate_ut: used as a shortform for AMD P-State unit test.
51  * Kernel module for testing the AMD P-State unit test
130 	struct cpufreq_policy *policy = NULL;  in amd_pstate_ut_check_perf()  local
134 		policy = cpufreq_cpu_get(cpu);  in amd_pstate_ut_check_perf()
135 		if (!policy)  in amd_pstate_ut_check_perf()
137 		cpudata = policy->driver_data;  in amd_pstate_ut_check_perf()
165 		if (highest_perf != READ_ONCE(cpudata->highest_perf) && !cpudata->hw_prefcore) {  in amd_pstate_ut_check_perf()
167 				__func__, cpu, highest_perf, cpudata->highest_perf);  in amd_pstate_ut_check_perf()
170 		if ((nominal_perf != READ_ONCE(cpudata->nominal_perf)) ||  in amd_pstate_ut_check_perf()
171 			(lowest_nonlinear_perf != READ_ONCE(cpudata->lowest_nonlinear_perf)) ||  in amd_pstate_ut_check_perf()
172 			(lowest_perf != READ_ONCE(cpudata->lowest_perf))) {  in amd_pstate_ut_check_perf()
175 				__func__, cpu, nominal_perf, cpudata->nominal_perf,  in amd_pstate_ut_check_perf()
176 				lowest_nonlinear_perf, cpudata->lowest_nonlinear_perf,  in amd_pstate_ut_check_perf()
177 				lowest_perf, cpudata->lowest_perf);  in amd_pstate_ut_check_perf()
191 		cpufreq_cpu_put(policy);  in amd_pstate_ut_check_perf()
197 	cpufreq_cpu_put(policy);  in amd_pstate_ut_check_perf()
208 	struct cpufreq_policy *policy = NULL;  in amd_pstate_ut_check_freq()  local
213 		policy = cpufreq_cpu_get(cpu);  in amd_pstate_ut_check_freq()
214 		if (!policy)  in amd_pstate_ut_check_freq()
216 		cpudata = policy->driver_data;  in amd_pstate_ut_check_freq()
218 		nominal_freq_khz = cpudata->nominal_freq*1000;  in amd_pstate_ut_check_freq()
219 		if (!((cpudata->max_freq >= nominal_freq_khz) &&  in amd_pstate_ut_check_freq()
220 			(nominal_freq_khz > cpudata->lowest_nonlinear_freq) &&  in amd_pstate_ut_check_freq()
221 			(cpudata->lowest_nonlinear_freq > cpudata->min_freq) &&  in amd_pstate_ut_check_freq()
222 			(cpudata->min_freq > 0))) {  in amd_pstate_ut_check_freq()
225 				__func__, cpu, cpudata->max_freq, nominal_freq_khz,  in amd_pstate_ut_check_freq()
226 				cpudata->lowest_nonlinear_freq, cpudata->min_freq);  in amd_pstate_ut_check_freq()
230 		if (cpudata->min_freq != policy->min) {  in amd_pstate_ut_check_freq()
233 				__func__, cpu, cpudata->min_freq, policy->min);  in amd_pstate_ut_check_freq()
237 		if (cpudata->boost_supported) {  in amd_pstate_ut_check_freq()
238 			if ((policy->max == cpudata->max_freq) ||  in amd_pstate_ut_check_freq()
239 					(policy->max == nominal_freq_khz))  in amd_pstate_ut_check_freq()
244 					__func__, cpu, policy->max, cpudata->max_freq,  in amd_pstate_ut_check_freq()
253 		cpufreq_cpu_put(policy);  in amd_pstate_ut_check_freq()
259 	cpufreq_cpu_put(policy);  in amd_pstate_ut_check_freq()
266 	pr_debug("->setting mode to %s\n", mode_str);  in amd_pstate_set_mode()
290 		pr_warn("%s: failed to update status for %s->%s: %d\n", __func__,  in amd_pstate_ut_check_driver()
307 			pr_info("%-4d %-20s\t success!\n", i+1, amd_pstate_ut_cases[i].name);  in amd_pstate_ut_init()
311 			pr_info("%-4d %-20s\t fail!\n", i+1, amd_pstate_ut_cases[i].name);  in amd_pstate_ut_init()
327 MODULE_DESCRIPTION("AMD P-state driver Test module");