| Message ID | 20240901024912.1217014-3-superm1@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | amd-pstate: Add unit tests for state machine | expand |
[AMD Official Use Only - AMD Internal Distribution Only] > -----Original Message----- > From: Mario Limonciello <superm1@kernel.org> > Sent: Sunday, September 1, 2024 10:49 AM > To: Meng, Li (Jassmine) <Li.Meng@amd.com>; Shenoy, Gautham Ranjal > <gautham.shenoy@amd.com>; Yuan, Perry <Perry.Yuan@amd.com> > Cc: open list:X86 ARCHITECTURE (32-BIT AND 64-BIT) <linux- > kernel@vger.kernel.org>; open list:CPU FREQUENCY SCALING FRAMEWORK > <linux-pm@vger.kernel.org>; ptr1337@cachyos.org; Limonciello, Mario > <Mario.Limonciello@amd.com> > Subject: [PATCH 2/2] cpufreq/amd-pstate-ut: Add test case for mode > switches > > From: Mario Limonciello <mario.limonciello@amd.com> > > 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 <mario.limonciello@amd.com> > --- > drivers/cpufreq/amd-pstate-ut.c | 41 > ++++++++++++++++++++++++++++++++- > 1 file changed, 40 insertions(+), 1 deletion(-) > > diff --git a/drivers/cpufreq/amd-pstate-ut.c b/drivers/cpufreq/amd-pstate- > ut.c index b7318669485e4..c291b3dbec381 100644 > --- 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(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) > @@ -257,6 +259,43 @@ static void amd_pstate_ut_check_freq(u32 index) > 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; > + } > + } Dose the mode switching test need to add some delay between the previous and new mode ? If lowlevel power firmware failed to handle the modes frequently, you can consider adding delay in future. Besides that, the patch looks good to me. Reviewed-by: Perry Yuan <perry.yuan@amd.com> > +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); > -- > 2.43.0
diff --git a/drivers/cpufreq/amd-pstate-ut.c b/drivers/cpufreq/amd-pstate-ut.c index b7318669485e4..c291b3dbec381 100644 --- 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(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) @@ -257,6 +259,43 @@ static void amd_pstate_ut_check_freq(u32 index) 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);