Re: [Intel-gfx] [PATCH 02/16] drm/i915/guc/slpc: Initial definitions for slpc

["Belgaumkar, Vinay" <vinay.belgaumkar@intel.com>]

On 7/10/2021 7:27 AM, Michal Wajdeczko wrote:
> Hi Vinay,
> 
> On 10.07.2021 03:20, Vinay Belgaumkar wrote:
>> Add macros to check for slpc support. This feature is currently supported
>> for gen12+ and enabled whenever guc submission is enabled/selected.
> 
> please try to use consistent names across all patches:
> 
> s/slpc/SLPC
> s/gen12/Gen12
> s/guc/GuC

Ok.

> 
>>
>> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
>> Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@intel.com>
>> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
>> ---
>>   drivers/gpu/drm/i915/gt/uc/intel_guc.c        |  1 +
>>   drivers/gpu/drm/i915/gt/uc/intel_guc.h        |  2 ++
>>   .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 21 +++++++++++++++++++
>>   .../gpu/drm/i915/gt/uc/intel_guc_submission.h | 16 ++++++++++++++
>>   drivers/gpu/drm/i915/gt/uc/intel_uc.c         |  6 ++++--
>>   drivers/gpu/drm/i915/gt/uc/intel_uc.h         |  1 +
>>   6 files changed, 45 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
>> index 979128e28372..b9a809f2d221 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
>> @@ -157,6 +157,7 @@ void intel_guc_init_early(struct intel_guc *guc)
>>   	intel_guc_ct_init_early(&guc->ct);
>>   	intel_guc_log_init_early(&guc->log);
>>   	intel_guc_submission_init_early(guc);
>> +	intel_guc_slpc_init_early(guc);
>>   
>>   	mutex_init(&guc->send_mutex);
>>   	spin_lock_init(&guc->irq_lock);
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
>> index 5d94cf482516..e5a456918b88 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
>> @@ -57,6 +57,8 @@ struct intel_guc {
>>   
>>   	bool submission_supported;
>>   	bool submission_selected;
>> +	bool slpc_supported;
>> +	bool slpc_selected;
>>   
>>   	struct i915_vma *ads_vma;
>>   	struct __guc_ads_blob *ads_blob;
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
>> index 9c102bf0c8e3..e2644a05f298 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
>> @@ -2351,6 +2351,27 @@ void intel_guc_submission_init_early(struct intel_guc *guc)
>>   	guc->submission_selected = __guc_submission_selected(guc);
>>   }
>>   
>> +static bool __guc_slpc_supported(struct intel_guc *guc)
> 
> hmm, easy to confuse with intel_guc_slpc_is_supported, so maybe:
> 
> __detect_slpc_supported()
> 
> (yes, I know you were following code above)
> 
>> +{
>> +	/* GuC slpc is unavailable for pre-Gen12 */
> 
> s/slpc/SLPC

  Ok.

> 
>> +	return guc->submission_supported &&
>> +		GRAPHICS_VER(guc_to_gt(guc)->i915) >= 12;
>> +}
>> +
>> +static bool __guc_slpc_selected(struct intel_guc *guc)
>> +{
>> +	if (!intel_guc_slpc_is_supported(guc))
>> +		return false;
>> +
>> +	return guc->submission_selected;
>> +}
>> +
>> +void intel_guc_slpc_init_early(struct intel_guc *guc)
>> +{
>> +	guc->slpc_supported = __guc_slpc_supported(guc);
>> +	guc->slpc_selected = __guc_slpc_selected(guc);
>> +}
> 
> in patch 4/16 you are introducing intel_guc_slpc.c|h so to have proper
> encapsulation better to define this function as
> 
> void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc) { }
> 
> and move it to intel_guc_slpc.c

done.

> 
>> +
>>   static inline struct intel_context *
>>   g2h_context_lookup(struct intel_guc *guc, u32 desc_idx)
>>   {
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
>> index be767eb6ff71..7ae5fd052faf 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
>> @@ -13,6 +13,7 @@
>>   struct drm_printer;
>>   struct intel_engine_cs;
>>   
>> +void intel_guc_slpc_init_early(struct intel_guc *guc);
> 
> it really does not belong to this .h
> 
>>   void intel_guc_submission_init_early(struct intel_guc *guc);
>>   int intel_guc_submission_init(struct intel_guc *guc);
>>   void intel_guc_submission_enable(struct intel_guc *guc);
>> @@ -50,4 +51,19 @@ static inline bool intel_guc_submission_is_used(struct intel_guc *guc)
>>   	return intel_guc_is_used(guc) && intel_guc_submission_is_wanted(guc);
>>   }
>>   
>> +static inline bool intel_guc_slpc_is_supported(struct intel_guc *guc)
>> +{
>> +	return guc->slpc_supported;
>> +}
>> +
>> +static inline bool intel_guc_slpc_is_wanted(struct intel_guc *guc)
>> +{
>> +	return guc->slpc_selected;
>> +}
>> +
>> +static inline bool intel_guc_slpc_is_used(struct intel_guc *guc)
>> +{
>> +	return intel_guc_submission_is_used(guc) && intel_guc_slpc_is_wanted(guc);
>> +}
> 
> did you try to define them in intel_guc_slpc.h ?
> 
> note that to avoid circular dependencies you can define slpc struct in
> intel_guc_slpc_types.h and then
> 
> in intel_guc.h:
> 	#include "intel_guc_slpc_types.h" instead of intel_guc_slpc.h
> 
> in intel_guc_slpc.h:
> 	#include "intel_guc.h"
> 	#include "intel_guc_slpc_types.h"
> 	#include "intel_guc_submission.h"
> 

that worked.

Thanks,
Vinay.

>> +
>>   #endif
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
>> index 61be0aa81492..dca5f6d0641b 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
>> @@ -76,16 +76,18 @@ static void __confirm_options(struct intel_uc *uc)
>>   	struct drm_i915_private *i915 = uc_to_gt(uc)->i915;
>>   
>>   	drm_dbg(&i915->drm,
>> -		"enable_guc=%d (guc:%s submission:%s huc:%s)\n",
>> +		"enable_guc=%d (guc:%s submission:%s huc:%s slpc:%s)\n",
>>   		i915->params.enable_guc,
>>   		yesno(intel_uc_wants_guc(uc)),
>>   		yesno(intel_uc_wants_guc_submission(uc)),
>> -		yesno(intel_uc_wants_huc(uc)));
>> +		yesno(intel_uc_wants_huc(uc)),
>> +		yesno(intel_uc_wants_guc_slpc(uc)));
>>   
>>   	if (i915->params.enable_guc == 0) {
>>   		GEM_BUG_ON(intel_uc_wants_guc(uc));
>>   		GEM_BUG_ON(intel_uc_wants_guc_submission(uc));
>>   		GEM_BUG_ON(intel_uc_wants_huc(uc));
>> +		GEM_BUG_ON(intel_uc_wants_guc_slpc(uc));
>>   		return;
>>   	}
>>   
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.h b/drivers/gpu/drm/i915/gt/uc/intel_uc.h
>> index e2da2b6e76e1..38e465fd8a0c 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.h
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.h
>> @@ -83,6 +83,7 @@ __uc_state_checker(x, func, uses, used)
>>   uc_state_checkers(guc, guc);
>>   uc_state_checkers(huc, huc);
>>   uc_state_checkers(guc, guc_submission);
>> +uc_state_checkers(guc, guc_slpc);
>>   
>>   #undef uc_state_checkers
>>   #undef __uc_state_checker
>>
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