linux-kernel - Re: [PATCH 4/7] drm/vc4: Use drm_printer for the debugfs and runtime bo stats output.

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Date:   Fri, 22 Mar 2019 11:41:23 +0100
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     Eric Anholt <eric@...olt.net>, dri-devel@...ts.freedesktop.org
Cc:     linux-kernel@...r.kernel.org,
        Maxime Ripard <maxime.ripard@...tlin.com>
Subject: Re: [PATCH 4/7] drm/vc4: Use drm_printer for the debugfs and
 runtime bo stats output.

Hi,

Le mercredi 20 février 2019 à 13:03 -0800, Eric Anholt a écrit :
> Now I can extend the stats without more copy and pasting between the
> two.

Reviewed-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>

Cheers,

Paul

> Signed-off-by: Eric Anholt <eric@...olt.net>
> ---
>  drivers/gpu/drm/vc4/vc4_bo.c | 48 +++++++++++-------------------------
>  1 file changed, 14 insertions(+), 34 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c
> index 8c509d560bf0..88ebd681d7eb 100644
> --- a/drivers/gpu/drm/vc4/vc4_bo.c
> +++ b/drivers/gpu/drm/vc4/vc4_bo.c
> @@ -40,7 +40,7 @@ static bool is_user_label(int label)
>  	return label >= VC4_BO_TYPE_COUNT;
>  }
>  
> -static void vc4_bo_stats_dump(struct vc4_dev *vc4)
> +static void vc4_bo_stats_print(struct drm_printer *p, struct vc4_dev *vc4)
>  {
>  	int i;
>  
> @@ -48,21 +48,21 @@ static void vc4_bo_stats_dump(struct vc4_dev *vc4)
>  		if (!vc4->bo_labels[i].num_allocated)
>  			continue;
>  
> -		DRM_INFO("%30s: %6dkb BOs (%d)\n",
> -			 vc4->bo_labels[i].name,
> -			 vc4->bo_labels[i].size_allocated / 1024,
> -			 vc4->bo_labels[i].num_allocated);
> +		drm_printf(p, "%30s: %6dkb BOs (%d)\n",
> +			   vc4->bo_labels[i].name,
> +			   vc4->bo_labels[i].size_allocated / 1024,
> +			   vc4->bo_labels[i].num_allocated);
>  	}
>  
>  	mutex_lock(&vc4->purgeable.lock);
>  	if (vc4->purgeable.num)
> -		DRM_INFO("%30s: %6zdkb BOs (%d)\n", "userspace BO cache",
> -			 vc4->purgeable.size / 1024, vc4->purgeable.num);
> +		drm_printf(p, "%30s: %6zdkb BOs (%d)\n", "userspace BO cache",
> +			   vc4->purgeable.size / 1024, vc4->purgeable.num);
>  
>  	if (vc4->purgeable.purged_num)
> -		DRM_INFO("%30s: %6zdkb BOs (%d)\n", "total purged BO",
> -			 vc4->purgeable.purged_size / 1024,
> -			 vc4->purgeable.purged_num);
> +		drm_printf(p, "%30s: %6zdkb BOs (%d)\n", "total purged BO",
> +			   vc4->purgeable.purged_size / 1024,
> +			   vc4->purgeable.purged_num);
>  	mutex_unlock(&vc4->purgeable.lock);
>  }
>  
> @@ -71,30 +71,9 @@ static int vc4_bo_stats_debugfs(struct seq_file *m, void *unused)
>  	struct drm_info_node *node = (struct drm_info_node *)m->private;
>  	struct drm_device *dev = node->minor->dev;
>  	struct vc4_dev *vc4 = to_vc4_dev(dev);
> -	int i;
> -
> -	mutex_lock(&vc4->bo_lock);
> -	for (i = 0; i < vc4->num_labels; i++) {
> -		if (!vc4->bo_labels[i].num_allocated)
> -			continue;
> -
> -		seq_printf(m, "%30s: %6dkb BOs (%d)\n",
> -			   vc4->bo_labels[i].name,
> -			   vc4->bo_labels[i].size_allocated / 1024,
> -			   vc4->bo_labels[i].num_allocated);
> -	}
> -	mutex_unlock(&vc4->bo_lock);
> +	struct drm_printer p = drm_seq_file_printer(m);
>  
> -	mutex_lock(&vc4->purgeable.lock);
> -	if (vc4->purgeable.num)
> -		seq_printf(m, "%30s: %6zdkb BOs (%d)\n", "userspace BO cache",
> -			   vc4->purgeable.size / 1024, vc4->purgeable.num);
> -
> -	if (vc4->purgeable.purged_num)
> -		seq_printf(m, "%30s: %6zdkb BOs (%d)\n", "total purged BO",
> -			   vc4->purgeable.purged_size / 1024,
> -			   vc4->purgeable.purged_num);
> -	mutex_unlock(&vc4->purgeable.lock);
> +	vc4_bo_stats_print(&p, vc4);
>  
>  	return 0;
>  }
> @@ -473,8 +452,9 @@ struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size,
>  	}
>  
>  	if (IS_ERR(cma_obj)) {
> +		struct drm_printer p = drm_info_printer(vc4->dev->dev);
>  		DRM_ERROR("Failed to allocate from CMA:\n");
> -		vc4_bo_stats_dump(vc4);
> +		vc4_bo_stats_print(&p, vc4);
>  		return ERR_PTR(-ENOMEM);
>  	}
>  	bo = to_vc4_bo(&cma_obj->base);
-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com