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

[Michal Wajdeczko <michal.wajdeczko@intel.com>]

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

> 
> 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

> +	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

> +
>  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"

> +
>  #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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