Merge branch 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git...
[platform/kernel/linux-starfive.git] / include / linux / arch_topology.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * include/linux/arch_topology.h - arch specific cpu topology information
4  */
5 #ifndef _LINUX_ARCH_TOPOLOGY_H_
6 #define _LINUX_ARCH_TOPOLOGY_H_
7
8 #include <linux/types.h>
9 #include <linux/percpu.h>
10
11 void topology_normalize_cpu_scale(void);
12 int topology_update_cpu_topology(void);
13
14 struct device_node;
15 bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
16
17 DECLARE_PER_CPU(unsigned long, cpu_scale);
18
19 static inline unsigned long topology_get_cpu_scale(int cpu)
20 {
21         return per_cpu(cpu_scale, cpu);
22 }
23
24 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
25
26 DECLARE_PER_CPU(unsigned long, arch_freq_scale);
27
28 static inline unsigned long topology_get_freq_scale(int cpu)
29 {
30         return per_cpu(arch_freq_scale, cpu);
31 }
32
33 void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
34                              unsigned long max_freq);
35 bool topology_scale_freq_invariant(void);
36
37 enum scale_freq_source {
38         SCALE_FREQ_SOURCE_CPUFREQ = 0,
39         SCALE_FREQ_SOURCE_ARCH,
40 };
41
42 struct scale_freq_data {
43         enum scale_freq_source source;
44         void (*set_freq_scale)(void);
45 };
46
47 void topology_scale_freq_tick(void);
48 void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus);
49 void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus);
50
51 DECLARE_PER_CPU(unsigned long, thermal_pressure);
52
53 static inline unsigned long topology_get_thermal_pressure(int cpu)
54 {
55         return per_cpu(thermal_pressure, cpu);
56 }
57
58 void topology_set_thermal_pressure(const struct cpumask *cpus,
59                                    unsigned long th_pressure);
60
61 struct cpu_topology {
62         int thread_id;
63         int core_id;
64         int package_id;
65         int llc_id;
66         cpumask_t thread_sibling;
67         cpumask_t core_sibling;
68         cpumask_t llc_sibling;
69 };
70
71 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
72 extern struct cpu_topology cpu_topology[NR_CPUS];
73
74 #define topology_physical_package_id(cpu)       (cpu_topology[cpu].package_id)
75 #define topology_core_id(cpu)           (cpu_topology[cpu].core_id)
76 #define topology_core_cpumask(cpu)      (&cpu_topology[cpu].core_sibling)
77 #define topology_sibling_cpumask(cpu)   (&cpu_topology[cpu].thread_sibling)
78 #define topology_llc_cpumask(cpu)       (&cpu_topology[cpu].llc_sibling)
79 void init_cpu_topology(void);
80 void store_cpu_topology(unsigned int cpuid);
81 const struct cpumask *cpu_coregroup_mask(int cpu);
82 void update_siblings_masks(unsigned int cpu);
83 void remove_cpu_topology(unsigned int cpuid);
84 void reset_cpu_topology(void);
85 int parse_acpi_topology(void);
86 #endif
87
88 #endif /* _LINUX_ARCH_TOPOLOGY_H_ */