Re: [PATCH 3/4] drm/xe: Extract xe_gt_idle() helper

[Aravind Iddamsetty <aravind.iddamsetty@xxxxxxxxxxxxxxx>]

On 17/04/24 19:20, Michal Wajdeczko wrote:
>
> On 17.04.2024 10:41, Aravind Iddamsetty wrote:
>> This would be used in other places outside of gt_reset path.
>>
>> Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
>>
>> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
>> Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty@xxxxxxxxxxxxxxx>
>> ---
>>  drivers/gpu/drm/xe/xe_gt.c | 31 +++++++++++++++++++++----------
>>  drivers/gpu/drm/xe/xe_gt.h |  1 +
>>  2 files changed, 22 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/xe/xe_gt.c b/drivers/gpu/drm/xe/xe_gt.c
>> index cfa5da900461..59f497d575ad 100644
>> --- a/drivers/gpu/drm/xe/xe_gt.c
>> +++ b/drivers/gpu/drm/xe/xe_gt.c
>> @@ -629,6 +629,26 @@ static int do_gt_restart(struct xe_gt *gt)
>>  	return 0;
>>  }
>>  
>> +/* Idle the GT */
> as this is a public function, can we have a proper kernel-doc here?
>
> and maybe some hint what should be done if this function fails?

Ok will do.

Thanks,
Aravind.
>
>> +int xe_gt_idle(struct xe_gt *gt)
>> +{
>> +	int err;
>> +
>> +	xe_gt_sanitize(gt);
>> +
>> +	xe_uc_gucrc_disable(&gt->uc);
>> +	xe_uc_stop_prepare(&gt->uc);
>> +	xe_gt_pagefault_reset(gt);
>> +
>> +	err = xe_uc_stop(&gt->uc);
>> +	if (err)
>> +		return err;
>> +
>> +	xe_gt_tlb_invalidation_reset(gt);
>> +
>> +	return err;
>> +}
>> +
>>  static int gt_reset(struct xe_gt *gt)
>>  {
>>  	int err;
>> @@ -645,21 +665,12 @@ static int gt_reset(struct xe_gt *gt)
>>  	}
>>  
>>  	xe_pm_runtime_get(gt_to_xe(gt));
>> -	xe_gt_sanitize(gt);
>>  
>>  	err = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
>>  	if (err)
>>  		goto err_msg;
>>  
>> -	xe_uc_gucrc_disable(&gt->uc);
>> -	xe_uc_stop_prepare(&gt->uc);
>> -	xe_gt_pagefault_reset(gt);
>> -
>> -	err = xe_uc_stop(&gt->uc);
>> -	if (err)
>> -		goto err_out;
>> -
>> -	xe_gt_tlb_invalidation_reset(gt);
>> +	xe_gt_idle(gt);
>>  
>>  	err = do_gt_reset(gt);
>>  	if (err)
>> diff --git a/drivers/gpu/drm/xe/xe_gt.h b/drivers/gpu/drm/xe/xe_gt.h
>> index ed6ea8057e35..d62af1725ff6 100644
>> --- a/drivers/gpu/drm/xe/xe_gt.h
>> +++ b/drivers/gpu/drm/xe/xe_gt.h
>> @@ -43,6 +43,7 @@ int xe_gt_resume(struct xe_gt *gt);
>>  void xe_gt_reset_async(struct xe_gt *gt);
>>  void xe_gt_sanitize(struct xe_gt *gt);
>>  void xe_gt_remove(struct xe_gt *gt);
>> +int xe_gt_idle(struct xe_gt *gt);
>>  
>>  /**
>>   * xe_gt_any_hw_engine_by_reset_domain - scan the list of engines and return the