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cpufreq/amd-pstate-ut: Add test case for mode switches

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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.

Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
This commit is contained in:
Mario Limonciello 2024-08-31 21:49:12 -05:00
parent 8d916815b0
commit 3e39e68dfb
1 changed files with 40 additions and 1 deletions
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41
drivers/cpufreq/amd-pstate-ut.c
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@ -54,12 +54,14 @@ static void amd_pstate_ut_acpi_cpc_valid(u32 index);
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)
@ -254,6 +256,43 @@ 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);