Re: [Intel-gfx] [PATCH 02/15] drm/i915/guc/slpc: Initial definitions for SLPC

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

On 26.07.2021 21:07, 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.
> 
> Include templates for SLPC init/fini and enable.
> 
> v2: Move SLPC helper functions to intel_guc_slpc.c/.h. Define basic
> template for SLPC structure in intel_guc_slpc_types.h. Fix copyright (Michal W)
> 
> v3: Review comments (Michal W)
> 
> 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>
> 
> drm/i915/guc/slpc: Lay out slpc init/enable/fini
> 
> Declare init/fini and enable function templates.
> 
> v2: Rebase
> 
> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
> Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@intel.com>
> ---
>  drivers/gpu/drm/i915/Makefile                 |  1 +
>  drivers/gpu/drm/i915/gt/uc/intel_guc.c        |  2 +
>  drivers/gpu/drm/i915/gt/uc/intel_guc.h        |  4 ++
>  drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c   | 45 +++++++++++++++++++
>  drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h   | 33 ++++++++++++++
>  .../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h | 12 +++++
>  drivers/gpu/drm/i915/gt/uc/intel_uc.c         |  6 ++-
>  drivers/gpu/drm/i915/gt/uc/intel_uc.h         |  2 +
>  8 files changed, 103 insertions(+), 2 deletions(-)
>  create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
>  create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
>  create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
> 
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index ab7679957623..d8eac4468df9 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -186,6 +186,7 @@ i915-y += gt/uc/intel_uc.o \
>  	  gt/uc/intel_guc_fw.o \
>  	  gt/uc/intel_guc_log.o \
>  	  gt/uc/intel_guc_log_debugfs.o \
> +	  gt/uc/intel_guc_slpc.o \
>  	  gt/uc/intel_guc_submission.o \
>  	  gt/uc/intel_huc.o \
>  	  gt/uc/intel_huc_debugfs.o \
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> index 979128e28372..39bc3c16057b 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> @@ -7,6 +7,7 @@
>  #include "gt/intel_gt_irq.h"
>  #include "gt/intel_gt_pm_irq.h"
>  #include "intel_guc.h"
> +#include "intel_guc_slpc.h"
>  #include "intel_guc_ads.h"
>  #include "intel_guc_submission.h"
>  #include "i915_drv.h"
> @@ -157,6 +158,7 @@ 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->slpc);
>  
>  	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 a9547069ee7e..15ad2eaee473 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> @@ -15,6 +15,7 @@
>  #include "intel_guc_ct.h"
>  #include "intel_guc_log.h"
>  #include "intel_guc_reg.h"
> +#include "intel_guc_slpc_types.h"
>  #include "intel_uc_fw.h"
>  #include "i915_utils.h"
>  #include "i915_vma.h"
> @@ -30,6 +31,7 @@ struct intel_guc {
>  	struct intel_uc_fw fw;
>  	struct intel_guc_log log;
>  	struct intel_guc_ct ct;
> +	struct intel_guc_slpc slpc;
>  
>  	/* Global engine used to submit requests to GuC */
>  	struct i915_sched_engine *sched_engine;
> @@ -57,6 +59,8 @@ struct intel_guc {
>  
>  	bool submission_supported;
>  	bool submission_selected;
> +	bool slpc_supported;
> +	bool slpc_selected;

(I know that you were following existing code, but we might do better
and since you have to resend it anyway without patch 1/15 ...)

as we have here:

+	struct intel_guc_slpc slpc;

then maybe both supported/selected shall be moved there as:

 struct intel_guc_slpc {
+	bool supported;
+	bool selected;
 };

so the struct wont be empty any more, with that fixed:

Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>

>  
>  	struct i915_vma *ads_vma;
>  	struct __guc_ads_blob *ads_blob;
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
> new file mode 100644
> index 000000000000..7275100ef8f8
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
> @@ -0,0 +1,45 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2021 Intel Corporation
> + */
> +
> +#include "i915_drv.h"
> +#include "intel_guc_slpc.h"
> +#include "gt/intel_gt.h"
> +
> +static inline struct intel_guc *slpc_to_guc(struct intel_guc_slpc *slpc)
> +{
> +	return container_of(slpc, struct intel_guc, slpc);
> +}
> +
> +static bool __detect_slpc_supported(struct intel_guc *guc)
> +{
> +	/* GuC SLPC is unavailable for pre-Gen12 */
> +	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_slpc *slpc)
> +{
> +	struct intel_guc *guc = slpc_to_guc(slpc);
> +
> +	guc->slpc_supported = __detect_slpc_supported(guc);
> +	guc->slpc_selected = __guc_slpc_selected(guc);
> +}
> +
> +int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
> +{
> +	return 0;
> +}
> +
> +void intel_guc_slpc_fini(struct intel_guc_slpc *slpc)
> +{
> +}
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
> new file mode 100644
> index 000000000000..c3b0ad7f0f93
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
> @@ -0,0 +1,33 @@
> +/* SPDX-License-Identifier: MIT */
> +/*
> + * Copyright © 2021 Intel Corporation
> + */
> +
> +#ifndef _INTEL_GUC_SLPC_H_
> +#define _INTEL_GUC_SLPC_H_
> +
> +#include "intel_guc_submission.h"
> +#include "intel_guc_slpc_types.h"
> +
> +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);
> +}
> +
> +void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc);
> +
> +int intel_guc_slpc_init(struct intel_guc_slpc *slpc);
> +int intel_guc_slpc_enable(struct intel_guc_slpc *slpc);
> +void intel_guc_slpc_fini(struct intel_guc_slpc *slpc);
> +
> +#endif
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
> new file mode 100644
> index 000000000000..bfe4a7f9ce15
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
> @@ -0,0 +1,12 @@
> +/* SPDX-License-Identifier: MIT */
> +/*
> + * Copyright © 2021 Intel Corporation
> + */
> +
> +#ifndef _INTEL_GUC_SLPC_TYPES_H_
> +#define _INTEL_GUC_SLPC_TYPES_H_
> +
> +struct intel_guc_slpc {
> +};
> +
> +#endif
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> index da57d18d9f6b..e6bd9406c7b2 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> @@ -75,16 +75,18 @@ 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..925a58ca6b94 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.h
> @@ -8,6 +8,7 @@
>  
>  #include "intel_guc.h"
>  #include "intel_guc_submission.h"
> +#include "intel_guc_slpc.h"
>  #include "intel_huc.h"
>  #include "i915_params.h"
>  
> @@ -83,6 +84,7 @@ __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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