Re: [PATCH 6/8] drm/vram-helper: don't use ttm bo->offset v2

[Thomas Zimmermann <tzimmermann@suse.de>]

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Hi

Am 19.02.20 um 14:53 schrieb Nirmoy Das:
> Calculate GEM VRAM bo's offset within vram-helper without depending on
> bo->offset
> 
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
> ---
>  drivers/gpu/drm/drm_gem_vram_helper.c | 17 ++++++++++++++++-
>  1 file changed, 16 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
> index 92a11bb42365..3edf5f241c15 100644
> --- a/drivers/gpu/drm/drm_gem_vram_helper.c
> +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
> @@ -198,6 +198,21 @@ u64 drm_gem_vram_mmap_offset(struct drm_gem_vram_object *gbo)
>  }
>  EXPORT_SYMBOL(drm_gem_vram_mmap_offset);
> 
> +/**
> + * drm_gem_vram_pg_offset() - Returns a GEM VRAM object's page offset
> + * @gbo:	the GEM VRAM object
> + *
> + * Returns:
> + * The buffer object's page offset, or
> + * 0 with a warning when memory manager node of the buffer object is NULL
> + * */
> +static s64 drm_gem_vram_pg_offset(struct drm_gem_vram_object *gbo)
> +{
> +	if (WARN_ON_ONCE(!gbo->bo.mem.mm_node))
> +		return 0;
> +	return gbo->bo.mem.start;
> +}

As Daniel said, you don't heve to document this function. Otherwise

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>

> +
>  /**
>   * drm_gem_vram_offset() - \
>  	Returns a GEM VRAM object's offset in video memory
> @@ -214,7 +229,7 @@ s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo)
>  {
>  	if (WARN_ON_ONCE(!gbo->pin_count))
>  		return (s64)-ENODEV;
> -	return gbo->bo.offset;
> +	return drm_gem_vram_pg_offset(gbo) << PAGE_SHIFT;
>  }
>  EXPORT_SYMBOL(drm_gem_vram_offset);
> 
> --
> 2.25.0
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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