Subject: Re: [PATCH 2/4] drm/xe/xe_drm_ras: Add support for clear-error-counter in XE DRM RAS

From: Raag Jadav <[email-masked]>
Date: Thu, 12 Mar 2026 11:17:30 +0100

On Wed, Mar 11, 2026 at 03:59:16PM +0530, Riana Tauro wrote:
> Add support for clear-error-counter command in XE DRM RAS.
> This resets the counter value.
> 
> Usage:
> 
> $ sudo ynl --family drm_ras  --do clear-error-counter --json \
> '{"node-id":1, "error-id":1}'
> None
> 
> Signed-off-by: Riana Tauro <[email-masked]>
> ---
>  drivers/gpu/drm/xe/xe_drm_ras.c | 35 +++++++++++++++++++++++++++++++--
>  1 file changed, 33 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_drm_ras.c b/drivers/gpu/drm/xe/xe_drm_ras.c
> index e07dc23a155e..c21c8b428de6 100644
> --- a/drivers/gpu/drm/xe/xe_drm_ras.c
> +++ b/drivers/gpu/drm/xe/xe_drm_ras.c
> @@ -27,6 +27,16 @@ static int hw_query_error_counter(struct xe_drm_ras_counter *info,
>  	return 0;
>  }
>  
> +static int hw_clear_error_counter(struct xe_drm_ras_counter *info, u32 error_id)
> +{
> +	if (!info || !info[error_id].name)
> +		return -ENOENT;
> +
> +	atomic_set(&info[error_id].counter, 0);
> +
> +	return 0;
> +}
> +
>  static int query_uncorrectable_error_counter(struct drm_ras_node *ep, u32 error_id,
>  					     const char **name, u32 *val)
>  {
> @@ -37,6 +47,15 @@ static int query_uncorrectable_error_counter(struct drm_ras_node *ep, u32 error_
>  	return hw_query_error_counter(info, error_id, name, val);
>  }
>  
> +static int clear_uncorrectable_error_counter(struct drm_ras_node *node, u32 error_id)
> +{
> +	struct xe_device *xe = node->priv;
> +	struct xe_drm_ras *ras = &xe->ras;
> +	struct xe_drm_ras_counter *info = ras->info[DRM_XE_RAS_ERR_SEV_UNCORRECTABLE];
> +
> +	return hw_clear_error_counter(info, error_id);
> +}
> +
>  static int query_correctable_error_counter(struct drm_ras_node *ep, u32 error_id,
>  					   const char **name, u32 *val)
>  {
> @@ -47,6 +66,15 @@ static int query_correctable_error_counter(struct drm_ras_node *ep, u32 error_id
>  	return hw_query_error_counter(info, error_id, name, val);
>  }
>  
> +static int clear_correctable_error_counter(struct drm_ras_node *node, u32 error_id)
> +{
> +	struct xe_device *xe = node->priv;
> +	struct xe_drm_ras *ras = &xe->ras;
> +	struct xe_drm_ras_counter *info = ras->info[DRM_XE_RAS_ERR_SEV_CORRECTABLE];
> +
> +	return hw_clear_error_counter(info, error_id);
> +}

This would've been much simpler if we had per node info, but for now

Reviewed-by: Raag Jadav <[email-masked]>

>  static struct xe_drm_ras_counter *allocate_and_copy_counters(struct xe_device *xe)
>  {
>  	struct xe_drm_ras_counter *counter;
> @@ -92,10 +120,13 @@ static int assign_node_params(struct xe_device *xe, struct drm_ras_node *node,
>  	if (IS_ERR(ras->info[severity]))
>  		return PTR_ERR(ras->info[severity]);
>  
> -	if (severity == DRM_XE_RAS_ERR_SEV_CORRECTABLE)
> +	if (severity == DRM_XE_RAS_ERR_SEV_CORRECTABLE) {
>  		node->query_error_counter = query_correctable_error_counter;
> -	else
> +		node->clear_error_counter = clear_correctable_error_counter;
> +	} else {
>  		node->query_error_counter = query_uncorrectable_error_counter;
> +		node->clear_error_counter = clear_uncorrectable_error_counter;
> +	}
>  
>  	return 0;
>  }
> -- 
> 2.47.1
>