[i-g-t,v4,1/2] tests/intel/xe_pm_residency: Add GT coarse power gating validation

[Nilawar, Badal]

On 23-10-2024 13:14, Anirban, Sk wrote:
> Hi Riana
> 
> I was using the dir in the previous version of the patch, I will remove 
> unnecessary opening and assertion of the gt directory.
> 
> Thanks,
> 
> Anirban

Do not “top-post” when replying.
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Regards,
Badal

> 
> On 23-10-2024 12:55, Riana Tauro wrote:
>> Hi Anirban
>>
>> On 10/22/2024 4:19 PM, sk.anirban at intel.com wrote:
>>> From: Sk Anirban <sk.anirban at intel.com>
>>>
>>> Implement test cpg-basic to validate coarse power gating status
>>> after S3 cycle.
>>> Add test cpg-gt-toggle to check if GT coarse power gating is up when
>>> forcewake is acquired and down when released.
>>>
>>> v2: Address cosmetic review comments (Riana)
>>>      Fix suspend state (Riana)
>>>      Add exit handler for test cpg-gt-toggle (Riana)
>>>
>>> v3: Address cosmetic review comments (Riana)
>>>      Fix commit message & test name (Konieczny)
>>>
>>> v4: Address cosmetic review comments (Riana)
>>>
>>> Signed-off-by: Sk Anirban <sk.anirban at intel.com>
>>> ---
>>>   tests/intel/xe_pm_residency.c | 90 +++++++++++++++++++++++++++++++++++
>>>   1 file changed, 90 insertions(+)
>>>
>>> diff --git a/tests/intel/xe_pm_residency.c b/tests/intel/ 
>>> xe_pm_residency.c
>>> index 772fe9b57..e9a257fd4 100644
>>> --- a/tests/intel/xe_pm_residency.c
>>> +++ b/tests/intel/xe_pm_residency.c
>>> @@ -63,6 +63,12 @@ enum test_type {
>>>    * SUBTEST: toggle-gt-c6
>>>    * Description: toggles GT C states by acquiring/releasing forcewake,
>>>    *        also validates power consumed by GPU in GT C6 is lesser 
>>> than that of GT C0.
>>> + *
>>> + * SUBTEST: cpg-basic
>>> + * Description: Validate GT coarse power gating status with S3 cycle.
>>> + *
>>> + * SUBTEST: cpg-gt-toggle
>>> + * Description: Toggle GT coarse power gating states by acquiring/ 
>>> releasing forcewake.
>>>    */
>>>   IGT_TEST_DESCRIPTION("Tests for gtidle properties");
>>>   @@ -317,6 +323,79 @@ static void toggle_gt_c6(int fd, int n)
>>>                    "Power consumed in GT C6 should be lower than GT 
>>> C0\n");
>>>   }
>>>   +static void cpg_enabled(int fd, int gt)
>>> +{
>>> +    int dir;
>>> +    char str[512], path[PATH_MAX], *render_substr, *media_substr;
>>> +    const char *render_power_gating = "Render Power Gating Enabled: ";
>>> +    const char *media_power_gating = "Media Power Gating Enabled: ";
>>> +
>>> +    dir = igt_debugfs_gt_dir(fd, gt);
>>> +    igt_assert(dir >= 0);
>> Not using dir anywhere. Why are you opening this gt dir?
>>> +
>>> +    snprintf(path, sizeof(path), "gt%d/powergate_info", gt);
>>> +    igt_debugfs_read(fd, path, str);
>>> +    close(dir);
>>> +
>>> +    render_substr = strstr(str, render_power_gating);
>>> +    if (render_substr)
>>> +        igt_assert_f(strncmp(render_substr + 
>>> strlen(render_power_gating), "yes", 3) == 0,
>>> +                 "Render Power Gating should be enabled");
>>> +
>>> +    media_substr = strstr(str, media_power_gating);
>>> +    if (media_substr)
>>> +        igt_assert_f(strncmp(media_substr + 
>>> strlen(media_power_gating), "yes", 3) == 0,
>>> +                 "Media Power Gating should be enabled");
>>> +}
>>> +
>>> +static void powergate_status(int fd, int gt, const char 
>>> *expected_status)
>>> +{
>>> +    int dir;
>>> +    char str[512], path[PATH_MAX], *status_substr;
>>> +    const char *power_gate_status = "Power Gate Status: ";
>>> +
>>> +    dir = igt_debugfs_gt_dir(fd, gt);
>>> +    igt_assert(dir >= 0);
>> Same
>>
>> Thanks
>> Riana Tauro
>>
>>> +
>>> +    snprintf(path, sizeof(path), "gt%d/powergate_info", gt);
>>> +    igt_debugfs_read(fd, path, str);
>>> +    close(dir);
>>> +
>>> +    status_substr = strstr(str, power_gate_status);
>>> +    while (status_substr) {
>>> +        igt_assert_f((strncmp(status_substr + 
>>> strlen(power_gate_status), expected_status,
>>> +                      strlen(expected_status)) == 0),
>>> +                  "Power Gate Status Should be %s\n %s\n", 
>>> expected_status, str);
>>> +        status_substr = strstr(status_substr + 
>>> strlen(power_gate_status),
>>> +                       power_gate_status);
>>> +    }
>>> +}
>>> +
>>> +static void cpg_basic(int fd, int gt)
>>> +{
>>> +    cpg_enabled(fd, gt);
>>> +    igt_system_suspend_autoresume(SUSPEND_STATE_S3, SUSPEND_TEST_NONE);
>>> +    cpg_enabled(fd, gt);
>>> +}
>>> +
>>> +static void cpg_gt_toggle(int fd)
>>> +{
>>> +    int gt;
>>> +
>>> +    fw_handle = igt_debugfs_open(fd, "forcewake_all", O_RDONLY);
>>> +    igt_assert_lte(0, fw_handle);
>>> +
>>> +    xe_for_each_gt(fd, gt) {
>>> +        cpg_enabled(fd, gt);
>>> +        powergate_status(fd, gt, "up");
>>> +    }
>>> +
>>> +    close(fw_handle);
>>> +    sleep(1);
>>> +    xe_for_each_gt(fd, gt)
>>> +        powergate_status(fd, gt, "down");
>>> +}
>>> +
>>>   igt_main
>>>   {
>>>       uint32_t d3cold_allowed;
>>> @@ -380,6 +459,17 @@ igt_main
>>>           toggle_gt_c6(fd, NUM_REPS);
>>>       }
>>>   +    igt_describe("Validate Coarse power gating status with S3 
>>> cycle");
>>> +    igt_subtest("cpg-basic")
>>> +        xe_for_each_gt(fd, gt)
>>> +            cpg_basic(fd, gt);
>>> +
>>> +    igt_describe("Toggle GT coarse power gating states by managing 
>>> forcewake");
>>> +    igt_subtest("cpg-gt-toggle") {
>>> +        igt_install_exit_handler(close_fw_handle);
>>> +        cpg_gt_toggle(fd);
>>> +    }
>>> +
>>>       igt_fixture {
>>>           close(fd);
>>>       }
>>