1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2018, Linaro Ltd.
7 #ifndef __LINUX_INTERCONNECT_PROVIDER_H
8 #define __LINUX_INTERCONNECT_PROVIDER_H
10 #include <linux/interconnect.h>
12 #define icc_units_to_bps(bw) ((bw) * 1000ULL)
15 struct of_phandle_args;
18 * struct icc_onecell_data - driver data for onecell interconnect providers
20 * @num_nodes: number of nodes in this device
21 * @nodes: array of pointers to the nodes in this device
23 struct icc_onecell_data {
24 unsigned int num_nodes;
25 struct icc_node *nodes[];
28 struct icc_node *of_icc_xlate_onecell(struct of_phandle_args *spec,
32 * struct icc_provider - interconnect provider (controller) entity that might
33 * provide multiple interconnect controls
35 * @provider_list: list of the registered interconnect providers
36 * @nodes: internal list of the interconnect provider nodes
37 * @set: pointer to device specific set operation function
38 * @aggregate: pointer to device specific aggregate operation function
39 * @pre_aggregate: pointer to device specific function that is called
40 * before the aggregation begins (optional)
41 * @xlate: provider-specific callback for mapping nodes from phandle arguments
42 * @dev: the device this interconnect provider belongs to
43 * @users: count of active users
44 * @inter_set: whether inter-provider pairs will be configured with @set
45 * @data: pointer to private data
48 struct list_head provider_list;
49 struct list_head nodes;
50 int (*set)(struct icc_node *src, struct icc_node *dst);
51 int (*aggregate)(struct icc_node *node, u32 tag, u32 avg_bw,
52 u32 peak_bw, u32 *agg_avg, u32 *agg_peak);
53 void (*pre_aggregate)(struct icc_node *node);
54 struct icc_node* (*xlate)(struct of_phandle_args *spec, void *data);
62 * struct icc_node - entity that is part of the interconnect topology
64 * @id: platform specific node id
65 * @name: node name used in debugfs
66 * @links: a list of targets pointing to where we can go next when traversing
67 * @num_links: number of links to other interconnect nodes
68 * @provider: points to the interconnect provider of this node
69 * @node_list: the list entry in the parent provider's "nodes" list
70 * @search_list: list used when walking the nodes graph
71 * @reverse: pointer to previous node when walking the nodes graph
72 * @is_traversed: flag that is used when walking the nodes graph
73 * @req_list: a list of QoS constraint requests associated with this node
74 * @avg_bw: aggregated value of average bandwidth requests from all consumers
75 * @peak_bw: aggregated value of peak bandwidth requests from all consumers
76 * @data: pointer to private data
81 struct icc_node **links;
84 struct icc_provider *provider;
85 struct list_head node_list;
86 struct list_head search_list;
87 struct icc_node *reverse;
89 struct hlist_head req_list;
95 #if IS_ENABLED(CONFIG_INTERCONNECT)
97 int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
98 u32 peak_bw, u32 *agg_avg, u32 *agg_peak);
99 struct icc_node *icc_node_create(int id);
100 void icc_node_destroy(int id);
101 int icc_link_create(struct icc_node *node, const int dst_id);
102 int icc_link_destroy(struct icc_node *src, struct icc_node *dst);
103 void icc_node_add(struct icc_node *node, struct icc_provider *provider);
104 void icc_node_del(struct icc_node *node);
105 int icc_nodes_remove(struct icc_provider *provider);
106 int icc_provider_add(struct icc_provider *provider);
107 int icc_provider_del(struct icc_provider *provider);
108 struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec);
112 static inline int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
113 u32 peak_bw, u32 *agg_avg, u32 *agg_peak)
118 static inline struct icc_node *icc_node_create(int id)
120 return ERR_PTR(-ENOTSUPP);
123 static inline void icc_node_destroy(int id)
127 static inline int icc_link_create(struct icc_node *node, const int dst_id)
132 static inline int icc_link_destroy(struct icc_node *src, struct icc_node *dst)
137 static inline void icc_node_add(struct icc_node *node, struct icc_provider *provider)
141 static inline void icc_node_del(struct icc_node *node)
145 static inline int icc_nodes_remove(struct icc_provider *provider)
150 static inline int icc_provider_add(struct icc_provider *provider)
155 static inline int icc_provider_del(struct icc_provider *provider)
160 static inline struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec)
162 return ERR_PTR(-ENOTSUPP);
165 #endif /* CONFIG_INTERCONNECT */
167 #endif /* __LINUX_INTERCONNECT_PROVIDER_H */