From aabfc7370a7da9c52be97c79ba70a20201e6864a Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Sat, 31 Aug 2024 21:49:12 -0500 Subject: cpufreq/amd-pstate-ut: Add test case for mode switches There is a state machine in the amd-pstate driver utilized for switches for all modes. To make sure that cleanup and setup works properly for each mode add a unit test case that tries all combinations. Signed-off-by: Mario Limonciello --- drivers/cpufreq/amd-pstate-ut.c | 41 ++++++++++++++++++++++++++++++++- 1 file changed, 40 insertions(+), 1 deletion(-) --- a/drivers/cpufreq/amd-pstate-ut.c +++ b/drivers/cpufreq/amd-pstate-ut.c @@ -54,12 +54,14 @@ static void amd_pstate_ut_acpi_cpc_valid static void amd_pstate_ut_check_enabled(u32 index); static void amd_pstate_ut_check_perf(u32 index); static void amd_pstate_ut_check_freq(u32 index); +static void amd_pstate_ut_check_driver(u32 index); static struct amd_pstate_ut_struct amd_pstate_ut_cases[] = { {"amd_pstate_ut_acpi_cpc_valid", amd_pstate_ut_acpi_cpc_valid }, {"amd_pstate_ut_check_enabled", amd_pstate_ut_check_enabled }, {"amd_pstate_ut_check_perf", amd_pstate_ut_check_perf }, - {"amd_pstate_ut_check_freq", amd_pstate_ut_check_freq } + {"amd_pstate_ut_check_freq", amd_pstate_ut_check_freq }, + {"amd_pstate_ut_check_driver", amd_pstate_ut_check_driver } }; static bool get_shared_mem(void) @@ -257,6 +259,43 @@ skip_test: cpufreq_cpu_put(policy); } +static int amd_pstate_set_mode(enum amd_pstate_mode mode) +{ + const char *mode_str = amd_pstate_get_mode_string(mode); + + pr_debug("->setting mode to %s\n", mode_str); + + return amd_pstate_update_status(mode_str, strlen(mode_str)); +} + +static void amd_pstate_ut_check_driver(u32 index) +{ + enum amd_pstate_mode mode1, mode2; + int ret; + + for (mode1 = AMD_PSTATE_DISABLE; mode1 < AMD_PSTATE_MAX; mode1++) { + ret = amd_pstate_set_mode(mode1); + if (ret) + goto out; + for (mode2 = AMD_PSTATE_DISABLE; mode2 < AMD_PSTATE_MAX; mode2++) { + if (mode1 == mode2) + continue; + ret = amd_pstate_set_mode(mode2); + if (ret) + goto out; + } + } +out: + if (ret) + pr_warn("%s: failed to update status for %s->%s: %d\n", __func__, + amd_pstate_get_mode_string(mode1), + amd_pstate_get_mode_string(mode2), ret); + + amd_pstate_ut_cases[index].result = ret ? + AMD_PSTATE_UT_RESULT_FAIL : + AMD_PSTATE_UT_RESULT_PASS; +} + static int __init amd_pstate_ut_init(void) { u32 i = 0, arr_size = ARRAY_SIZE(amd_pstate_ut_cases);