1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2018, Linaro Ltd.
4 * Author: Georgi Djakov <georgi.djakov@linaro.org>
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_node_data - icc node data
23 struct icc_node_data {
24 struct icc_node *node;
29 * struct icc_onecell_data - driver data for onecell interconnect providers
31 * @num_nodes: number of nodes in this device
32 * @nodes: array of pointers to the nodes in this device
34 struct icc_onecell_data {
35 unsigned int num_nodes;
36 struct icc_node *nodes[] __counted_by(num_nodes);
39 struct icc_node *of_icc_xlate_onecell(const struct of_phandle_args *spec,
43 * struct icc_provider - interconnect provider (controller) entity that might
44 * provide multiple interconnect controls
46 * @provider_list: list of the registered interconnect providers
47 * @nodes: internal list of the interconnect provider nodes
48 * @set: pointer to device specific set operation function
49 * @aggregate: pointer to device specific aggregate operation function
50 * @pre_aggregate: pointer to device specific function that is called
51 * before the aggregation begins (optional)
52 * @get_bw: pointer to device specific function to get current bandwidth
53 * @xlate: provider-specific callback for mapping nodes from phandle arguments
54 * @xlate_extended: vendor-specific callback for mapping node data from phandle arguments
55 * @dev: the device this interconnect provider belongs to
56 * @users: count of active users
57 * @inter_set: whether inter-provider pairs will be configured with @set
58 * @data: pointer to private data
61 struct list_head provider_list;
62 struct list_head nodes;
63 int (*set)(struct icc_node *src, struct icc_node *dst);
64 int (*aggregate)(struct icc_node *node, u32 tag, u32 avg_bw,
65 u32 peak_bw, u32 *agg_avg, u32 *agg_peak);
66 void (*pre_aggregate)(struct icc_node *node);
67 int (*get_bw)(struct icc_node *node, u32 *avg, u32 *peak);
68 struct icc_node* (*xlate)(const struct of_phandle_args *spec, void *data);
69 struct icc_node_data* (*xlate_extended)(const struct of_phandle_args *spec,
78 * struct icc_node - entity that is part of the interconnect topology
80 * @id: platform specific node id
81 * @name: node name used in debugfs
82 * @links: a list of targets pointing to where we can go next when traversing
83 * @num_links: number of links to other interconnect nodes
84 * @provider: points to the interconnect provider of this node
85 * @node_list: the list entry in the parent provider's "nodes" list
86 * @search_list: list used when walking the nodes graph
87 * @reverse: pointer to previous node when walking the nodes graph
88 * @is_traversed: flag that is used when walking the nodes graph
89 * @req_list: a list of QoS constraint requests associated with this node
90 * @avg_bw: aggregated value of average bandwidth requests from all consumers
91 * @peak_bw: aggregated value of peak bandwidth requests from all consumers
92 * @init_avg: average bandwidth value that is read from the hardware during init
93 * @init_peak: peak bandwidth value that is read from the hardware during init
94 * @data: pointer to private data
99 struct icc_node **links;
102 struct icc_provider *provider;
103 struct list_head node_list;
104 struct list_head search_list;
105 struct icc_node *reverse;
107 struct hlist_head req_list;
115 #if IS_ENABLED(CONFIG_INTERCONNECT)
117 int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
118 u32 peak_bw, u32 *agg_avg, u32 *agg_peak);
119 struct icc_node *icc_node_create(int id);
120 void icc_node_destroy(int id);
121 int icc_link_create(struct icc_node *node, const int dst_id);
122 void icc_node_add(struct icc_node *node, struct icc_provider *provider);
123 void icc_node_del(struct icc_node *node);
124 int icc_nodes_remove(struct icc_provider *provider);
125 void icc_provider_init(struct icc_provider *provider);
126 int icc_provider_register(struct icc_provider *provider);
127 void icc_provider_deregister(struct icc_provider *provider);
128 struct icc_node_data *of_icc_get_from_provider(const struct of_phandle_args *spec);
129 void icc_sync_state(struct device *dev);
133 static inline int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
134 u32 peak_bw, u32 *agg_avg, u32 *agg_peak)
139 static inline struct icc_node *icc_node_create(int id)
141 return ERR_PTR(-ENOTSUPP);
144 static inline void icc_node_destroy(int id)
148 static inline int icc_link_create(struct icc_node *node, const int dst_id)
153 static inline void icc_node_add(struct icc_node *node, struct icc_provider *provider)
157 static inline void icc_node_del(struct icc_node *node)
161 static inline int icc_nodes_remove(struct icc_provider *provider)
166 static inline void icc_provider_init(struct icc_provider *provider) { }
168 static inline int icc_provider_register(struct icc_provider *provider)
173 static inline void icc_provider_deregister(struct icc_provider *provider) { }
175 static inline struct icc_node_data *of_icc_get_from_provider(const struct of_phandle_args *spec)
177 return ERR_PTR(-ENOTSUPP);
180 #endif /* CONFIG_INTERCONNECT */
182 #endif /* __LINUX_INTERCONNECT_PROVIDER_H */