diff options
Diffstat (limited to 'drivers/gpu/drm/drm_ras.c')
| -rw-r--r-- | drivers/gpu/drm/drm_ras.c | 43 |
1 files changed, 42 insertions, 1 deletions
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); @@ -315,6 +321,41 @@ int drm_ras_nl_get_error_counter_doit(struct sk_buff *skb, } /** + * 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 * |