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

[Anirban, Sk]

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

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);
>>       }
>