Re: [PATCH 2/4] drm/i915: Support whitelist workarounds on all engines

[Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>]

On 14/06/2019 01:28, Robert M. Fosha wrote:
> From: John Harrison <John.C.Harrison@xxxxxxxxx>
>
> Newer hardware requires setting up whitelists on engines other than
> render. So, extend the whitelist code to support all engines.
>
> Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
> Signed-off-by: Robert M. Fosha <robert.m.fosha@xxxxxxxxx>
> Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> ---
>   drivers/gpu/drm/i915/gt/intel_workarounds.c | 66 +++++++++++++++------
>   1 file changed, 47 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> index ae82340fff45..5308a0864e78 100644
> --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> @@ -1043,48 +1043,79 @@ static void gen9_whitelist_build(struct i915_wa_list *w)
>   	whitelist_reg(w, GEN8_HDC_CHICKEN1);
>   }
>   
> -static void skl_whitelist_build(struct i915_wa_list *w)
> +static void skl_whitelist_build(struct intel_engine_cs *engine)
>   {
> +	struct i915_wa_list *w = &engine->whitelist;
> +
> +	if (engine->class != RENDER_CLASS)
> +		return;
> +
>   	gen9_whitelist_build(w);
>   
>   	/* WaDisableLSQCROPERFforOCL:skl */
>   	whitelist_reg(w, GEN8_L3SQCREG4);
>   }
>   
> -static void bxt_whitelist_build(struct i915_wa_list *w)
> +static void bxt_whitelist_build(struct intel_engine_cs *engine)
>   {
> -	gen9_whitelist_build(w);
> +	if (engine->class != RENDER_CLASS)
> +		return;
> +
> +	gen9_whitelist_build(&engine->whitelist);
>   }
>   
> -static void kbl_whitelist_build(struct i915_wa_list *w)
> +static void kbl_whitelist_build(struct intel_engine_cs *engine)
>   {
> +	struct i915_wa_list *w = &engine->whitelist;
> +
> +	if (engine->class != RENDER_CLASS)
> +		return;
> +
>   	gen9_whitelist_build(w);
>   
>   	/* WaDisableLSQCROPERFforOCL:kbl */
>   	whitelist_reg(w, GEN8_L3SQCREG4);
>   }
>   
> -static void glk_whitelist_build(struct i915_wa_list *w)
> +static void glk_whitelist_build(struct intel_engine_cs *engine)
>   {
> +	struct i915_wa_list *w = &engine->whitelist;
> +
> +	if (engine->class != RENDER_CLASS)
> +		return;
> +
>   	gen9_whitelist_build(w);
>   
>   	/* WA #0862: Userspace has to set "Barrier Mode" to avoid hangs. */
>   	whitelist_reg(w, GEN9_SLICE_COMMON_ECO_CHICKEN1);
>   }
>   
> -static void cfl_whitelist_build(struct i915_wa_list *w)
> +static void cfl_whitelist_build(struct intel_engine_cs *engine)
>   {
> -	gen9_whitelist_build(w);
> +	if (engine->class != RENDER_CLASS)
> +		return;
> +
> +	gen9_whitelist_build(&engine->whitelist);
>   }
>   
> -static void cnl_whitelist_build(struct i915_wa_list *w)
> +static void cnl_whitelist_build(struct intel_engine_cs *engine)
>   {
> +	struct i915_wa_list *w = &engine->whitelist;
> +
> +	if (engine->class != RENDER_CLASS)
> +		return;
> +
>   	/* WaEnablePreemptionGranularityControlByUMD:cnl */
>   	whitelist_reg(w, GEN8_CS_CHICKEN1);
>   }
>   
> -static void icl_whitelist_build(struct i915_wa_list *w)
> +static void icl_whitelist_build(struct intel_engine_cs *engine)
>   {
> +	struct i915_wa_list *w = &engine->whitelist;
> +
> +	if (engine->class != RENDER_CLASS)
> +		return;
> +
>   	/* WaAllowUMDToModifyHalfSliceChicken7:icl */
>   	whitelist_reg(w, GEN9_HALF_SLICE_CHICKEN7);
>   
> @@ -1100,25 +1131,22 @@ void intel_engine_init_whitelist(struct intel_engine_cs *engine)
>   	struct drm_i915_private *i915 = engine->i915;
>   	struct i915_wa_list *w = &engine->whitelist;
>   
> -	if (engine->class != RENDER_CLASS)
> -		return;
> -
>   	wa_init_start(w, "whitelist");
>   
>   	if (IS_GEN(i915, 11))
> -		icl_whitelist_build(w);
> +		icl_whitelist_build(engine);
>   	else if (IS_CANNONLAKE(i915))
> -		cnl_whitelist_build(w);
> +		cnl_whitelist_build(engine);
>   	else if (IS_COFFEELAKE(i915))
> -		cfl_whitelist_build(w);
> +		cfl_whitelist_build(engine);
>   	else if (IS_GEMINILAKE(i915))
> -		glk_whitelist_build(w);
> +		glk_whitelist_build(engine);
>   	else if (IS_KABYLAKE(i915))
> -		kbl_whitelist_build(w);
> +		kbl_whitelist_build(engine);
>   	else if (IS_BROXTON(i915))
> -		bxt_whitelist_build(w);
> +		bxt_whitelist_build(engine);
>   	else if (IS_SKYLAKE(i915))
> -		skl_whitelist_build(w);
> +		skl_whitelist_build(engine);
>   	else if (INTEL_GEN(i915) <= 8)
>   		return;
>   	else

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

Regards,

Tvrtko
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