Re: [PATCH v2 1/2] drm/drm_ras: Add clear-error-counter netlink command to drm_ras

Re: [PATCH v2 1/2] drm/drm_ras: Add clear-error-counter netlink command to drm_ras

[Tauro, Riana]

Hi Zack

Could you please take a look at this patch if applicable to your 
usecase. Please let me know if any
changes are required

@Rodrigo This is already reviewed by Jakub and Raag.
If there are no opens, can this be merged via drm_misc

Thanks
Riana

On 4/9/2026 1:03 PM, Riana Tauro wrote:
> Introduce a new 'clear-error-counter' drm_ras command to reset the counter
> value for a specific error counter of a given node.
>
> The command is a 'do' netlink request with 'node-id' and 'error-id'
> as parameters with no response payload.
>
> Usage:
>
> $ sudo ynl --family drm_ras  --do clear-error-counter --json \
> '{"node-id":1, "error-id":1}'
> None
>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Zack McKevitt <zachary.mckevitt@oss.qualcomm.com>
> Cc: Lijo Lazar <lijo.lazar@amd.com>
> Cc: Hawking Zhang <Hawking.Zhang@amd.com>
> Cc: David S. Miller <davem@davemloft.net>
> Cc: Paolo Abeni <pabeni@redhat.com>
> Cc: Eric Dumazet <edumazet@google.com>
> Signed-off-by: Riana Tauro <riana.tauro@intel.com>
> Reviewed-by: Jakub Kicinski <kuba@kernel.org>
> Reviewed-by: Raag Jadav <raag.jadav@intel.com>
> ---
>   Documentation/gpu/drm-ras.rst            |  8 +++++
>   Documentation/netlink/specs/drm_ras.yaml | 13 ++++++-
>   drivers/gpu/drm/drm_ras.c                | 43 +++++++++++++++++++++++-
>   drivers/gpu/drm/drm_ras_nl.c             | 13 +++++++
>   drivers/gpu/drm/drm_ras_nl.h             |  2 ++
>   include/drm/drm_ras.h                    | 11 ++++++
>   include/uapi/drm/drm_ras.h               |  1 +
>   7 files changed, 89 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/gpu/drm-ras.rst b/Documentation/gpu/drm-ras.rst
> index 70b246a78fc8..4636e68f5678 100644
> --- a/Documentation/gpu/drm-ras.rst
> +++ b/Documentation/gpu/drm-ras.rst
> @@ -52,6 +52,8 @@ User space tools can:
>     as a parameter.
>   * Query specific error counter values with the ``get-error-counter`` command, using both
>     ``node-id`` and ``error-id`` as parameters.
> +* Clear specific error counters with the ``clear-error-counter`` command, using both
> +  ``node-id`` and ``error-id`` as parameters.
>   
>   YAML-based Interface
>   --------------------
> @@ -101,3 +103,9 @@ Example: Query an error counter for a given node
>       sudo ynl --family drm_ras --do get-error-counter --json '{"node-id":0, "error-id":1}'
>       {'error-id': 1, 'error-name': 'error_name1', 'error-value': 0}
>   
> +Example: Clear an error counter for a given node
> +
> +.. code-block:: bash
> +
> +    sudo ynl --family drm_ras --do clear-error-counter --json '{"node-id":0, "error-id":1}'
> +    None
> diff --git a/Documentation/netlink/specs/drm_ras.yaml b/Documentation/netlink/specs/drm_ras.yaml
> index 79af25dac3c5..e113056f8c01 100644
> --- a/Documentation/netlink/specs/drm_ras.yaml
> +++ b/Documentation/netlink/specs/drm_ras.yaml
> @@ -99,7 +99,7 @@ operations:
>         flags: [admin-perm]
>         do:
>           request:
> -          attributes:
> +          attributes: &id-attrs
>               - node-id
>               - error-id
>           reply:
> @@ -113,3 +113,14 @@ operations:
>               - node-id
>           reply:
>             attributes: *errorinfo
> +    -
> +      name: clear-error-counter
> +      doc: >-
> +           Clear error counter for a given node.
> +           The request includes the error-id and node-id of the
> +           counter to be cleared.
> +      attribute-set: error-counter-attrs
> +      flags: [admin-perm]
> +      do:
> +        request:
> +          attributes: *id-attrs
> diff --git a/drivers/gpu/drm/drm_ras.c b/drivers/gpu/drm/drm_ras.c
> index b2fa5ab86d87..d6eab29a1394 100644
> --- a/drivers/gpu/drm/drm_ras.c
> +++ b/drivers/gpu/drm/drm_ras.c
> @@ -26,7 +26,7 @@
>    * efficient lookup by ID. Nodes can be registered or unregistered
>    * dynamically at runtime.
>    *
> - * A Generic Netlink family `drm_ras` exposes two main operations to
> + * A Generic Netlink family `drm_ras` exposes the below operations to
>    * userspace:
>    *
>    * 1. LIST_NODES: Dump all currently registered RAS nodes.
> @@ -37,6 +37,10 @@
>    *    Returns all counters of a node if only Node ID is provided or specific
>    *    error counters.
>    *
> + * 3. CLEAR_ERROR_COUNTER: Clear error counter of a given node.
> + *    Userspace must provide Node ID, Error ID.
> + *    Clears specific error counter of a node if supported.
> + *
>    * Node registration:
>    *
>    * - drm_ras_node_register(): Registers a new node and assigns
> @@ -66,6 +70,8 @@
>    *   operation, fetching all counters from a specific node.
>    * - drm_ras_nl_get_error_counter_doit(): Implements the GET_ERROR_COUNTER doit
>    *   operation, fetching a counter value from a specific node.
> + * - drm_ras_nl_clear_error_counter_doit(): Implements the CLEAR_ERROR_COUNTER doit
> + *   operation, clearing a counter value from a specific node.
>    */
>   
>   static DEFINE_XARRAY_ALLOC(drm_ras_xa);
> @@ -314,6 +320,41 @@ int drm_ras_nl_get_error_counter_doit(struct sk_buff *skb,
>   	return doit_reply_value(info, node_id, error_id);
>   }
>   
> +/**
> + * drm_ras_nl_clear_error_counter_doit() - Clear an error counter of a node
> + * @skb: Netlink message buffer
> + * @info: Generic Netlink info containing attributes of the request
> + *
> + * Extracts the node ID and error ID from the netlink attributes and
> + * clears the current value.
> + *
> + * Return: 0 on success, or negative errno on failure.
> + */
> +int drm_ras_nl_clear_error_counter_doit(struct sk_buff *skb,
> +					struct genl_info *info)
> +{
> +	struct drm_ras_node *node;
> +	u32 node_id, error_id;
> +
> +	if (!info->attrs ||
> +	    GENL_REQ_ATTR_CHECK(info, DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID) ||
> +	    GENL_REQ_ATTR_CHECK(info, DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID))
> +		return -EINVAL;
> +
> +	node_id = nla_get_u32(info->attrs[DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID]);
> +	error_id = nla_get_u32(info->attrs[DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID]);
> +
> +	node = xa_load(&drm_ras_xa, node_id);
> +	if (!node || !node->clear_error_counter)
> +		return -ENOENT;
> +
> +	if (error_id < node->error_counter_range.first ||
> +	    error_id > node->error_counter_range.last)
> +		return -EINVAL;
> +
> +	return node->clear_error_counter(node, error_id);
> +}
> +
>   /**
>    * drm_ras_node_register() - Register a new RAS node
>    * @node: Node structure to register
> diff --git a/drivers/gpu/drm/drm_ras_nl.c b/drivers/gpu/drm/drm_ras_nl.c
> index 16803d0c4a44..dea1c1b2494e 100644
> --- a/drivers/gpu/drm/drm_ras_nl.c
> +++ b/drivers/gpu/drm/drm_ras_nl.c
> @@ -22,6 +22,12 @@ static const struct nla_policy drm_ras_get_error_counter_dump_nl_policy[DRM_RAS_
>   	[DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID] = { .type = NLA_U32, },
>   };
>   
> +/* DRM_RAS_CMD_CLEAR_ERROR_COUNTER - do */
> +static const struct nla_policy drm_ras_clear_error_counter_nl_policy[DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID + 1] = {
> +	[DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID] = { .type = NLA_U32, },
> +	[DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID] = { .type = NLA_U32, },
> +};
> +
>   /* Ops table for drm_ras */
>   static const struct genl_split_ops drm_ras_nl_ops[] = {
>   	{
> @@ -43,6 +49,13 @@ static const struct genl_split_ops drm_ras_nl_ops[] = {
>   		.maxattr	= DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID,
>   		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
>   	},
> +	{
> +		.cmd		= DRM_RAS_CMD_CLEAR_ERROR_COUNTER,
> +		.doit		= drm_ras_nl_clear_error_counter_doit,
> +		.policy		= drm_ras_clear_error_counter_nl_policy,
> +		.maxattr	= DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID,
> +		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
> +	},
>   };
>   
>   struct genl_family drm_ras_nl_family __ro_after_init = {
> diff --git a/drivers/gpu/drm/drm_ras_nl.h b/drivers/gpu/drm/drm_ras_nl.h
> index 06ccd9342773..a398643572a5 100644
> --- a/drivers/gpu/drm/drm_ras_nl.h
> +++ b/drivers/gpu/drm/drm_ras_nl.h
> @@ -18,6 +18,8 @@ int drm_ras_nl_get_error_counter_doit(struct sk_buff *skb,
>   				      struct genl_info *info);
>   int drm_ras_nl_get_error_counter_dumpit(struct sk_buff *skb,
>   					struct netlink_callback *cb);
> +int drm_ras_nl_clear_error_counter_doit(struct sk_buff *skb,
> +					struct genl_info *info);
>   
>   extern struct genl_family drm_ras_nl_family;
>   
> diff --git a/include/drm/drm_ras.h b/include/drm/drm_ras.h
> index 5d50209e51db..f2a787bc4f64 100644
> --- a/include/drm/drm_ras.h
> +++ b/include/drm/drm_ras.h
> @@ -58,6 +58,17 @@ struct drm_ras_node {
>   	int (*query_error_counter)(struct drm_ras_node *node, u32 error_id,
>   				   const char **name, u32 *val);
>   
> +	/**
> +	 * @clear_error_counter:
> +	 *
> +	 * This callback is used by drm_ras to clear a specific error counter.
> +	 * Driver should implement this callback to support clearing error counters
> +	 * of a node.
> +	 *
> +	 * Returns: 0 on success, negative error code on failure.
> +	 */
> +	int (*clear_error_counter)(struct drm_ras_node *node, u32 error_id);
> +
>   	/** @priv: Driver private data */
>   	void *priv;
>   };
> diff --git a/include/uapi/drm/drm_ras.h b/include/uapi/drm/drm_ras.h
> index 5f40fa5b869d..218a3ee86805 100644
> --- a/include/uapi/drm/drm_ras.h
> +++ b/include/uapi/drm/drm_ras.h
> @@ -41,6 +41,7 @@ enum {
>   enum {
>   	DRM_RAS_CMD_LIST_NODES = 1,
>   	DRM_RAS_CMD_GET_ERROR_COUNTER,
> +	DRM_RAS_CMD_CLEAR_ERROR_COUNTER,
>   
>   	__DRM_RAS_CMD_MAX,
>   	DRM_RAS_CMD_MAX = (__DRM_RAS_CMD_MAX - 1)

[PATCH v2 0/2] Add clear-error-counter command to drm_ras

[Riana Tauro]

Add clear-error-counter command to drm_ras to clear a specific error
counter of a node. The request parameters for this command are
node-id and error-id and no response payload.
Implement the callback in XE driver to demonstrate usage.

Usage:

$ sudo ynl --family drm_ras  --dump get-error-counter --json '{"node-id":1}'
[{'error-id': 1, 'error-name': 'core-compute', 'error-value': 0},
 {'error-id': 2, 'error-name': 'soc-internal', 'error-value': 3}]

$ sudo ynl --family drm_ras  --do clear-error-counter --json \
'{"node-id":1, "error-id":2}'
None

$ sudo ynl --family drm_ras  --dump get-error-counter --json '{"node-id":1}'
[{'error-id': 1, 'error-name': 'core-compute', 'error-value': 0},
 {'error-id': 2, 'error-name': 'soc-internal', 'error-value': 0}]

Rev2: Split patches

Riana Tauro (2):
  drm/drm_ras: Add clear-error-counter netlink command to drm_ras
  drm/xe/xe_drm_ras: Add support for clear-error-counter in XE drm_ras

 Documentation/gpu/drm-ras.rst            |  8 +++++
 Documentation/netlink/specs/drm_ras.yaml | 13 ++++++-
 drivers/gpu/drm/drm_ras.c                | 43 +++++++++++++++++++++++-
 drivers/gpu/drm/drm_ras_nl.c             | 13 +++++++
 drivers/gpu/drm/drm_ras_nl.h             |  2 ++
 drivers/gpu/drm/xe/xe_drm_ras.c          | 35 +++++++++++++++++--
 include/drm/drm_ras.h                    | 11 ++++++
 include/uapi/drm/drm_ras.h               |  1 +
 8 files changed, 122 insertions(+), 4 deletions(-)

-- 
2.47.1

[PATCH v2 1/2] drm/drm_ras: Add clear-error-counter netlink command to drm_ras

[Riana Tauro]

Introduce a new 'clear-error-counter' drm_ras command to reset the counter
value for a specific error counter of a given node.

The command is a 'do' netlink request with 'node-id' and 'error-id'
as parameters with no response payload.

Usage:

$ sudo ynl --family drm_ras  --do clear-error-counter --json \
'{"node-id":1, "error-id":1}'
None

Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Zack McKevitt <zachary.mckevitt@oss.qualcomm.com>
Cc: Lijo Lazar <lijo.lazar@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Riana Tauro <riana.tauro@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Raag Jadav <raag.jadav@intel.com>
---
 Documentation/gpu/drm-ras.rst            |  8 +++++
 Documentation/netlink/specs/drm_ras.yaml | 13 ++++++-
 drivers/gpu/drm/drm_ras.c                | 43 +++++++++++++++++++++++-
 drivers/gpu/drm/drm_ras_nl.c             | 13 +++++++
 drivers/gpu/drm/drm_ras_nl.h             |  2 ++
 include/drm/drm_ras.h                    | 11 ++++++
 include/uapi/drm/drm_ras.h               |  1 +
 7 files changed, 89 insertions(+), 2 deletions(-)

diff --git a/Documentation/gpu/drm-ras.rst b/Documentation/gpu/drm-ras.rst
index 70b246a78fc8..4636e68f5678 100644
--- a/Documentation/gpu/drm-ras.rst
+++ b/Documentation/gpu/drm-ras.rst
@@ -52,6 +52,8 @@ User space tools can:
   as a parameter.
 * Query specific error counter values with the ``get-error-counter`` command, using both
   ``node-id`` and ``error-id`` as parameters.
+* Clear specific error counters with the ``clear-error-counter`` command, using both
+  ``node-id`` and ``error-id`` as parameters.
 
 YAML-based Interface
 --------------------
@@ -101,3 +103,9 @@ Example: Query an error counter for a given node
     sudo ynl --family drm_ras --do get-error-counter --json '{"node-id":0, "error-id":1}'
     {'error-id': 1, 'error-name': 'error_name1', 'error-value': 0}
 
+Example: Clear an error counter for a given node
+
+.. code-block:: bash
+
+    sudo ynl --family drm_ras --do clear-error-counter --json '{"node-id":0, "error-id":1}'
+    None
diff --git a/Documentation/netlink/specs/drm_ras.yaml b/Documentation/netlink/specs/drm_ras.yaml
index 79af25dac3c5..e113056f8c01 100644
--- a/Documentation/netlink/specs/drm_ras.yaml
+++ b/Documentation/netlink/specs/drm_ras.yaml
@@ -99,7 +99,7 @@ operations:
       flags: [admin-perm]
       do:
         request:
-          attributes:
+          attributes: &id-attrs
             - node-id
             - error-id
         reply:
@@ -113,3 +113,14 @@ operations:
             - node-id
         reply:
           attributes: *errorinfo
+    -
+      name: clear-error-counter
+      doc: >-
+           Clear error counter for a given node.
+           The request includes the error-id and node-id of the
+           counter to be cleared.
+      attribute-set: error-counter-attrs
+      flags: [admin-perm]
+      do:
+        request:
+          attributes: *id-attrs
diff --git a/drivers/gpu/drm/drm_ras.c b/drivers/gpu/drm/drm_ras.c
index b2fa5ab86d87..d6eab29a1394 100644
--- a/drivers/gpu/drm/drm_ras.c
+++ b/drivers/gpu/drm/drm_ras.c
@@ -26,7 +26,7 @@
  * efficient lookup by ID. Nodes can be registered or unregistered
  * dynamically at runtime.
  *
- * A Generic Netlink family `drm_ras` exposes two main operations to
+ * A Generic Netlink family `drm_ras` exposes the below operations to
  * userspace:
  *
  * 1. LIST_NODES: Dump all currently registered RAS nodes.
@@ -37,6 +37,10 @@
  *    Returns all counters of a node if only Node ID is provided or specific
  *    error counters.
  *
+ * 3. CLEAR_ERROR_COUNTER: Clear error counter of a given node.
+ *    Userspace must provide Node ID, Error ID.
+ *    Clears specific error counter of a node if supported.
+ *
  * Node registration:
  *
  * - drm_ras_node_register(): Registers a new node and assigns
@@ -66,6 +70,8 @@
  *   operation, fetching all counters from a specific node.
  * - drm_ras_nl_get_error_counter_doit(): Implements the GET_ERROR_COUNTER doit
  *   operation, fetching a counter value from a specific node.
+ * - drm_ras_nl_clear_error_counter_doit(): Implements the CLEAR_ERROR_COUNTER doit
+ *   operation, clearing a counter value from a specific node.
  */
 
 static DEFINE_XARRAY_ALLOC(drm_ras_xa);
@@ -314,6 +320,41 @@ int drm_ras_nl_get_error_counter_doit(struct sk_buff *skb,
 	return doit_reply_value(info, node_id, error_id);
 }
 
+/**
+ * drm_ras_nl_clear_error_counter_doit() - Clear an error counter of a node
+ * @skb: Netlink message buffer
+ * @info: Generic Netlink info containing attributes of the request
+ *
+ * Extracts the node ID and error ID from the netlink attributes and
+ * clears the current value.
+ *
+ * Return: 0 on success, or negative errno on failure.
+ */
+int drm_ras_nl_clear_error_counter_doit(struct sk_buff *skb,
+					struct genl_info *info)
+{
+	struct drm_ras_node *node;
+	u32 node_id, error_id;
+
+	if (!info->attrs ||
+	    GENL_REQ_ATTR_CHECK(info, DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID) ||
+	    GENL_REQ_ATTR_CHECK(info, DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID))
+		return -EINVAL;
+
+	node_id = nla_get_u32(info->attrs[DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID]);
+	error_id = nla_get_u32(info->attrs[DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID]);
+
+	node = xa_load(&drm_ras_xa, node_id);
+	if (!node || !node->clear_error_counter)
+		return -ENOENT;
+
+	if (error_id < node->error_counter_range.first ||
+	    error_id > node->error_counter_range.last)
+		return -EINVAL;
+
+	return node->clear_error_counter(node, error_id);
+}
+
 /**
  * drm_ras_node_register() - Register a new RAS node
  * @node: Node structure to register
diff --git a/drivers/gpu/drm/drm_ras_nl.c b/drivers/gpu/drm/drm_ras_nl.c
index 16803d0c4a44..dea1c1b2494e 100644
--- a/drivers/gpu/drm/drm_ras_nl.c
+++ b/drivers/gpu/drm/drm_ras_nl.c
@@ -22,6 +22,12 @@ static const struct nla_policy drm_ras_get_error_counter_dump_nl_policy[DRM_RAS_
 	[DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID] = { .type = NLA_U32, },
 };
 
+/* DRM_RAS_CMD_CLEAR_ERROR_COUNTER - do */
+static const struct nla_policy drm_ras_clear_error_counter_nl_policy[DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID + 1] = {
+	[DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID] = { .type = NLA_U32, },
+	[DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID] = { .type = NLA_U32, },
+};
+
 /* Ops table for drm_ras */
 static const struct genl_split_ops drm_ras_nl_ops[] = {
 	{
@@ -43,6 +49,13 @@ static const struct genl_split_ops drm_ras_nl_ops[] = {
 		.maxattr	= DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID,
 		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
 	},
+	{
+		.cmd		= DRM_RAS_CMD_CLEAR_ERROR_COUNTER,
+		.doit		= drm_ras_nl_clear_error_counter_doit,
+		.policy		= drm_ras_clear_error_counter_nl_policy,
+		.maxattr	= DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID,
+		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
+	},
 };
 
 struct genl_family drm_ras_nl_family __ro_after_init = {
diff --git a/drivers/gpu/drm/drm_ras_nl.h b/drivers/gpu/drm/drm_ras_nl.h
index 06ccd9342773..a398643572a5 100644
--- a/drivers/gpu/drm/drm_ras_nl.h
+++ b/drivers/gpu/drm/drm_ras_nl.h
@@ -18,6 +18,8 @@ int drm_ras_nl_get_error_counter_doit(struct sk_buff *skb,
 				      struct genl_info *info);
 int drm_ras_nl_get_error_counter_dumpit(struct sk_buff *skb,
 					struct netlink_callback *cb);
+int drm_ras_nl_clear_error_counter_doit(struct sk_buff *skb,
+					struct genl_info *info);
 
 extern struct genl_family drm_ras_nl_family;
 
diff --git a/include/drm/drm_ras.h b/include/drm/drm_ras.h
index 5d50209e51db..f2a787bc4f64 100644
--- a/include/drm/drm_ras.h
+++ b/include/drm/drm_ras.h
@@ -58,6 +58,17 @@ struct drm_ras_node {
 	int (*query_error_counter)(struct drm_ras_node *node, u32 error_id,
 				   const char **name, u32 *val);
 
+	/**
+	 * @clear_error_counter:
+	 *
+	 * This callback is used by drm_ras to clear a specific error counter.
+	 * Driver should implement this callback to support clearing error counters
+	 * of a node.
+	 *
+	 * Returns: 0 on success, negative error code on failure.
+	 */
+	int (*clear_error_counter)(struct drm_ras_node *node, u32 error_id);
+
 	/** @priv: Driver private data */
 	void *priv;
 };
diff --git a/include/uapi/drm/drm_ras.h b/include/uapi/drm/drm_ras.h
index 5f40fa5b869d..218a3ee86805 100644
--- a/include/uapi/drm/drm_ras.h
+++ b/include/uapi/drm/drm_ras.h
@@ -41,6 +41,7 @@ enum {
 enum {
 	DRM_RAS_CMD_LIST_NODES = 1,
 	DRM_RAS_CMD_GET_ERROR_COUNTER,
+	DRM_RAS_CMD_CLEAR_ERROR_COUNTER,
 
 	__DRM_RAS_CMD_MAX,
 	DRM_RAS_CMD_MAX = (__DRM_RAS_CMD_MAX - 1)
-- 
2.47.1

[PATCH v2 2/2] drm/xe/xe_drm_ras: Add support for clear-error-counter in XE drm_ras

[Riana Tauro]

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 <riana.tauro@intel.com>
Reviewed-by: Raag Jadav <raag.jadav@intel.com>
---
 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);
+}
+
 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

Re: [PATCH v2 1/2] drm/drm_ras: Add clear-error-counter netlink command to drm_ras

[Rodrigo Vivi]

On Thu, Apr 09, 2026 at 12:51:44PM +0530, Tauro, Riana wrote:
> Hi Zack
> 
> Could you please take a look at this patch if applicable to your usecase.
> Please let me know if any
> changes are required
> 
> @Rodrigo This is already reviewed by Jakub and Raag.
> If there are no opens, can this be merged via drm_misc

if we push this to drm-misc-next, it might take a few weeks to propagate
back to drm-xe-next. With other work from you and Raag going fast pace
on drm-xe-next around this area, I'm afraid it could cause some conflicts.

It is definitely fine by me, but another option is to get ack from
drm-misc maintainers to get this through drm-xe-next.

so, really okay with drm-misc-next?

> 
> Thanks
> Riana
> 
> On 4/9/2026 1:03 PM, Riana Tauro wrote:
> > Introduce a new 'clear-error-counter' drm_ras command to reset the counter
> > value for a specific error counter of a given node.
> > 
> > The command is a 'do' netlink request with 'node-id' and 'error-id'
> > as parameters with no response payload.
> > 
> > Usage:
> > 
> > $ sudo ynl --family drm_ras  --do clear-error-counter --json \
> > '{"node-id":1, "error-id":1}'
> > None
> > 
> > Cc: Jakub Kicinski <kuba@kernel.org>
> > Cc: Zack McKevitt <zachary.mckevitt@oss.qualcomm.com>
> > Cc: Lijo Lazar <lijo.lazar@amd.com>
> > Cc: Hawking Zhang <Hawking.Zhang@amd.com>
> > Cc: David S. Miller <davem@davemloft.net>
> > Cc: Paolo Abeni <pabeni@redhat.com>
> > Cc: Eric Dumazet <edumazet@google.com>
> > Signed-off-by: Riana Tauro <riana.tauro@intel.com>
> > Reviewed-by: Jakub Kicinski <kuba@kernel.org>
> > Reviewed-by: Raag Jadav <raag.jadav@intel.com>
> > ---
> >   Documentation/gpu/drm-ras.rst            |  8 +++++
> >   Documentation/netlink/specs/drm_ras.yaml | 13 ++++++-
> >   drivers/gpu/drm/drm_ras.c                | 43 +++++++++++++++++++++++-
> >   drivers/gpu/drm/drm_ras_nl.c             | 13 +++++++
> >   drivers/gpu/drm/drm_ras_nl.h             |  2 ++
> >   include/drm/drm_ras.h                    | 11 ++++++
> >   include/uapi/drm/drm_ras.h               |  1 +
> >   7 files changed, 89 insertions(+), 2 deletions(-)
> > 
> > diff --git a/Documentation/gpu/drm-ras.rst b/Documentation/gpu/drm-ras.rst
> > index 70b246a78fc8..4636e68f5678 100644
> > --- a/Documentation/gpu/drm-ras.rst
> > +++ b/Documentation/gpu/drm-ras.rst
> > @@ -52,6 +52,8 @@ User space tools can:
> >     as a parameter.
> >   * Query specific error counter values with the ``get-error-counter`` command, using both
> >     ``node-id`` and ``error-id`` as parameters.
> > +* Clear specific error counters with the ``clear-error-counter`` command, using both
> > +  ``node-id`` and ``error-id`` as parameters.
> >   YAML-based Interface
> >   --------------------
> > @@ -101,3 +103,9 @@ Example: Query an error counter for a given node
> >       sudo ynl --family drm_ras --do get-error-counter --json '{"node-id":0, "error-id":1}'
> >       {'error-id': 1, 'error-name': 'error_name1', 'error-value': 0}
> > +Example: Clear an error counter for a given node
> > +
> > +.. code-block:: bash
> > +
> > +    sudo ynl --family drm_ras --do clear-error-counter --json '{"node-id":0, "error-id":1}'
> > +    None
> > diff --git a/Documentation/netlink/specs/drm_ras.yaml b/Documentation/netlink/specs/drm_ras.yaml
> > index 79af25dac3c5..e113056f8c01 100644
> > --- a/Documentation/netlink/specs/drm_ras.yaml
> > +++ b/Documentation/netlink/specs/drm_ras.yaml
> > @@ -99,7 +99,7 @@ operations:
> >         flags: [admin-perm]
> >         do:
> >           request:
> > -          attributes:
> > +          attributes: &id-attrs
> >               - node-id
> >               - error-id
> >           reply:
> > @@ -113,3 +113,14 @@ operations:
> >               - node-id
> >           reply:
> >             attributes: *errorinfo
> > +    -
> > +      name: clear-error-counter
> > +      doc: >-
> > +           Clear error counter for a given node.
> > +           The request includes the error-id and node-id of the
> > +           counter to be cleared.
> > +      attribute-set: error-counter-attrs
> > +      flags: [admin-perm]
> > +      do:
> > +        request:
> > +          attributes: *id-attrs
> > diff --git a/drivers/gpu/drm/drm_ras.c b/drivers/gpu/drm/drm_ras.c
> > index b2fa5ab86d87..d6eab29a1394 100644
> > --- a/drivers/gpu/drm/drm_ras.c
> > +++ b/drivers/gpu/drm/drm_ras.c
> > @@ -26,7 +26,7 @@
> >    * efficient lookup by ID. Nodes can be registered or unregistered
> >    * dynamically at runtime.
> >    *
> > - * A Generic Netlink family `drm_ras` exposes two main operations to
> > + * A Generic Netlink family `drm_ras` exposes the below operations to
> >    * userspace:
> >    *
> >    * 1. LIST_NODES: Dump all currently registered RAS nodes.
> > @@ -37,6 +37,10 @@
> >    *    Returns all counters of a node if only Node ID is provided or specific
> >    *    error counters.
> >    *
> > + * 3. CLEAR_ERROR_COUNTER: Clear error counter of a given node.
> > + *    Userspace must provide Node ID, Error ID.
> > + *    Clears specific error counter of a node if supported.
> > + *
> >    * Node registration:
> >    *
> >    * - drm_ras_node_register(): Registers a new node and assigns
> > @@ -66,6 +70,8 @@
> >    *   operation, fetching all counters from a specific node.
> >    * - drm_ras_nl_get_error_counter_doit(): Implements the GET_ERROR_COUNTER doit
> >    *   operation, fetching a counter value from a specific node.
> > + * - drm_ras_nl_clear_error_counter_doit(): Implements the CLEAR_ERROR_COUNTER doit
> > + *   operation, clearing a counter value from a specific node.
> >    */
> >   static DEFINE_XARRAY_ALLOC(drm_ras_xa);
> > @@ -314,6 +320,41 @@ int drm_ras_nl_get_error_counter_doit(struct sk_buff *skb,
> >   	return doit_reply_value(info, node_id, error_id);
> >   }
> > +/**
> > + * drm_ras_nl_clear_error_counter_doit() - Clear an error counter of a node
> > + * @skb: Netlink message buffer
> > + * @info: Generic Netlink info containing attributes of the request
> > + *
> > + * Extracts the node ID and error ID from the netlink attributes and
> > + * clears the current value.
> > + *
> > + * Return: 0 on success, or negative errno on failure.
> > + */
> > +int drm_ras_nl_clear_error_counter_doit(struct sk_buff *skb,
> > +					struct genl_info *info)
> > +{
> > +	struct drm_ras_node *node;
> > +	u32 node_id, error_id;
> > +
> > +	if (!info->attrs ||
> > +	    GENL_REQ_ATTR_CHECK(info, DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID) ||
> > +	    GENL_REQ_ATTR_CHECK(info, DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID))
> > +		return -EINVAL;
> > +
> > +	node_id = nla_get_u32(info->attrs[DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID]);
> > +	error_id = nla_get_u32(info->attrs[DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID]);
> > +
> > +	node = xa_load(&drm_ras_xa, node_id);
> > +	if (!node || !node->clear_error_counter)
> > +		return -ENOENT;
> > +
> > +	if (error_id < node->error_counter_range.first ||
> > +	    error_id > node->error_counter_range.last)
> > +		return -EINVAL;
> > +
> > +	return node->clear_error_counter(node, error_id);
> > +}
> > +
> >   /**
> >    * drm_ras_node_register() - Register a new RAS node
> >    * @node: Node structure to register
> > diff --git a/drivers/gpu/drm/drm_ras_nl.c b/drivers/gpu/drm/drm_ras_nl.c
> > index 16803d0c4a44..dea1c1b2494e 100644
> > --- a/drivers/gpu/drm/drm_ras_nl.c
> > +++ b/drivers/gpu/drm/drm_ras_nl.c
> > @@ -22,6 +22,12 @@ static const struct nla_policy drm_ras_get_error_counter_dump_nl_policy[DRM_RAS_
> >   	[DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID] = { .type = NLA_U32, },
> >   };
> > +/* DRM_RAS_CMD_CLEAR_ERROR_COUNTER - do */
> > +static const struct nla_policy drm_ras_clear_error_counter_nl_policy[DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID + 1] = {
> > +	[DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID] = { .type = NLA_U32, },
> > +	[DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID] = { .type = NLA_U32, },
> > +};
> > +
> >   /* Ops table for drm_ras */
> >   static const struct genl_split_ops drm_ras_nl_ops[] = {
> >   	{
> > @@ -43,6 +49,13 @@ static const struct genl_split_ops drm_ras_nl_ops[] = {
> >   		.maxattr	= DRM_RAS_A_ERROR_COUNTER_ATTRS_NODE_ID,
> >   		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
> >   	},
> > +	{
> > +		.cmd		= DRM_RAS_CMD_CLEAR_ERROR_COUNTER,
> > +		.doit		= drm_ras_nl_clear_error_counter_doit,
> > +		.policy		= drm_ras_clear_error_counter_nl_policy,
> > +		.maxattr	= DRM_RAS_A_ERROR_COUNTER_ATTRS_ERROR_ID,
> > +		.flags		= GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
> > +	},
> >   };
> >   struct genl_family drm_ras_nl_family __ro_after_init = {
> > diff --git a/drivers/gpu/drm/drm_ras_nl.h b/drivers/gpu/drm/drm_ras_nl.h
> > index 06ccd9342773..a398643572a5 100644
> > --- a/drivers/gpu/drm/drm_ras_nl.h
> > +++ b/drivers/gpu/drm/drm_ras_nl.h
> > @@ -18,6 +18,8 @@ int drm_ras_nl_get_error_counter_doit(struct sk_buff *skb,
> >   				      struct genl_info *info);
> >   int drm_ras_nl_get_error_counter_dumpit(struct sk_buff *skb,
> >   					struct netlink_callback *cb);
> > +int drm_ras_nl_clear_error_counter_doit(struct sk_buff *skb,
> > +					struct genl_info *info);
> >   extern struct genl_family drm_ras_nl_family;
> > diff --git a/include/drm/drm_ras.h b/include/drm/drm_ras.h
> > index 5d50209e51db..f2a787bc4f64 100644
> > --- a/include/drm/drm_ras.h
> > +++ b/include/drm/drm_ras.h
> > @@ -58,6 +58,17 @@ struct drm_ras_node {
> >   	int (*query_error_counter)(struct drm_ras_node *node, u32 error_id,
> >   				   const char **name, u32 *val);
> > +	/**
> > +	 * @clear_error_counter:
> > +	 *
> > +	 * This callback is used by drm_ras to clear a specific error counter.
> > +	 * Driver should implement this callback to support clearing error counters
> > +	 * of a node.
> > +	 *
> > +	 * Returns: 0 on success, negative error code on failure.
> > +	 */
> > +	int (*clear_error_counter)(struct drm_ras_node *node, u32 error_id);
> > +
> >   	/** @priv: Driver private data */
> >   	void *priv;
> >   };
> > diff --git a/include/uapi/drm/drm_ras.h b/include/uapi/drm/drm_ras.h
> > index 5f40fa5b869d..218a3ee86805 100644
> > --- a/include/uapi/drm/drm_ras.h
> > +++ b/include/uapi/drm/drm_ras.h
> > @@ -41,6 +41,7 @@ enum {
> >   enum {
> >   	DRM_RAS_CMD_LIST_NODES = 1,
> >   	DRM_RAS_CMD_GET_ERROR_COUNTER,
> > +	DRM_RAS_CMD_CLEAR_ERROR_COUNTER,
> >   	__DRM_RAS_CMD_MAX,
> >   	DRM_RAS_CMD_MAX = (__DRM_RAS_CMD_MAX - 1)