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

[Riana Tauro <riana.tauro@intel.com>]

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>
---
 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