Re: [Intel-gfx] [PATCH v3 16/16] drm/i915/guc: Remove plain ads_blob pointer

[Matthew Brost <matthew.brost@intel.com>]

On Wed, Feb 16, 2022 at 09:41:47AM -0800, Lucas De Marchi wrote:
> Now we have the access to content of GuC ADS either using iosys_map
> API or using a temporary buffer. Remove guc->ads_blob as there shouldn't
> be updates using the bare pointer anymore.
> 
> Cc: Matt Roper <matthew.d.roper@intel.com>
> Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: John Harrison <John.C.Harrison@Intel.com>
> Cc: Matthew Brost <matthew.brost@intel.com>
> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
> Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

Reviewed-by: Matthew Brost <matthew.brost@intel.com>

> ---
>  drivers/gpu/drm/i915/gt/uc/intel_guc.h     | 3 +--
>  drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 8 ++++----
>  2 files changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> index f857e9190750..bf7079480d47 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
> @@ -147,8 +147,7 @@ struct intel_guc {
>  
>  	/** @ads_vma: object allocated to hold the GuC ADS */
>  	struct i915_vma *ads_vma;
> -	/** @ads_blob: contents of the GuC ADS */
> -	struct __guc_ads_blob *ads_blob;
> +	/** @ads_map: contents of the GuC ADS */
>  	struct iosys_map ads_map;
>  	/** @ads_regset_size: size of the save/restore regsets in the ADS */
>  	u32 ads_regset_size;
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> index d0593063c0dc..847e00390b00 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
> @@ -667,6 +667,7 @@ static void __guc_ads_init(struct intel_guc *guc)
>   */
>  int intel_guc_ads_create(struct intel_guc *guc)
>  {
> +	void *ads_blob;
>  	u32 size;
>  	int ret;
>  
> @@ -691,14 +692,14 @@ int intel_guc_ads_create(struct intel_guc *guc)
>  	size = guc_ads_blob_size(guc);
>  
>  	ret = intel_guc_allocate_and_map_vma(guc, size, &guc->ads_vma,
> -					     (void **)&guc->ads_blob);
> +					     &ads_blob);
>  	if (ret)
>  		return ret;
>  
>  	if (i915_gem_object_is_lmem(guc->ads_vma->obj))
> -		iosys_map_set_vaddr_iomem(&guc->ads_map, (void __iomem *)guc->ads_blob);
> +		iosys_map_set_vaddr_iomem(&guc->ads_map, (void __iomem *)ads_blob);
>  	else
> -		iosys_map_set_vaddr(&guc->ads_map, guc->ads_blob);
> +		iosys_map_set_vaddr(&guc->ads_map, ads_blob);
>  
>  	__guc_ads_init(guc);
>  
> @@ -720,7 +721,6 @@ void intel_guc_ads_init_late(struct intel_guc *guc)
>  void intel_guc_ads_destroy(struct intel_guc *guc)
>  {
>  	i915_vma_unpin_and_release(&guc->ads_vma, I915_VMA_RELEASE_MAP);
> -	guc->ads_blob = NULL;
>  	iosys_map_clear(&guc->ads_map);
>  	kfree(guc->ads_regset);
>  }
> -- 
> 2.35.1
>