1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2026 Intel Corporation 4 */ 5 6 #ifndef __DRM_RAS_H__ 7 #define __DRM_RAS_H__ 8 9 #include <uapi/drm/drm_ras.h> 10 11 /** 12 * struct drm_ras_node - A DRM RAS Node 13 */ 14 struct drm_ras_node { 15 /** @id: Unique identifier for the node. Dynamically assigned. */ 16 u32 id; 17 /** 18 * @device_name: Human-readable name of the device. Given by the driver. 19 */ 20 const char *device_name; 21 /** @node_name: Human-readable name of the node. Given by the driver. */ 22 const char *node_name; 23 /** @type: Type of the node (enum drm_ras_node_type). */ 24 enum drm_ras_node_type type; 25 26 /* Error-Counter Related Callback and Variables */ 27 28 /** @error_counter_range: Range of valid Error IDs for this node. */ 29 struct { 30 /** @first: First valid Error ID. */ 31 u32 first; 32 /** @last: Last valid Error ID. Mandatory entry. */ 33 u32 last; 34 } error_counter_range; 35 36 /** 37 * @query_error_counter: 38 * 39 * This callback is used by drm-ras to query a specific error counter. 40 * Used for input check and to iterate all error counters in a node. 41 * 42 * Driver should expect query_error_counter() to be called with 43 * error_id from `error_counter_range.first` to 44 * `error_counter_range.last`. 45 * 46 * The @query_error_counter is a mandatory callback for 47 * error_counter_node. 48 * 49 * Returns: 0 on success, 50 * -ENOENT when error_id is not supported as an indication that 51 * drm_ras should silently skip this entry. Used for 52 * supporting non-contiguous error ranges. 53 * Driver is responsible for maintaining the list of 54 * supported error IDs in the range of first to last. 55 * Other negative values on errors that should terminate the 56 * netlink query. 57 */ 58 int (*query_error_counter)(struct drm_ras_node *node, u32 error_id, 59 const char **name, u32 *val); 60 61 /** 62 * @clear_error_counter: 63 * 64 * This callback is used by drm_ras to clear a specific error counter. 65 * Driver should implement this callback to support clearing error counters 66 * of a node. 67 * 68 * Returns: 0 on success, negative error code on failure. 69 */ 70 int (*clear_error_counter)(struct drm_ras_node *node, u32 error_id); 71 72 /** @priv: Driver private data */ 73 void *priv; 74 }; 75 76 struct drm_device; 77 78 #if IS_ENABLED(CONFIG_DRM_RAS) 79 int drm_ras_node_register(struct drm_ras_node *node); 80 void drm_ras_node_unregister(struct drm_ras_node *node); 81 #else 82 static inline int drm_ras_node_register(struct drm_ras_node *node) { return 0; } 83 static inline void drm_ras_node_unregister(struct drm_ras_node *node) { } 84 #endif 85 86 #endif 87