1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
3 */
4
5 #include <rte_errno.h>
6 #include <rte_spinlock.h>
7
8 #include "rte_power.h"
9 #include "power_acpi_cpufreq.h"
10 #include "power_kvm_vm.h"
11 #include "power_pstate_cpufreq.h"
12 #include "power_common.h"
13
14 enum power_management_env global_default_env = PM_ENV_NOT_SET;
15
16 static rte_spinlock_t global_env_cfg_lock = RTE_SPINLOCK_INITIALIZER;
17
18 /* function pointers */
19 rte_power_freqs_t rte_power_freqs = NULL;
20 rte_power_get_freq_t rte_power_get_freq = NULL;
21 rte_power_set_freq_t rte_power_set_freq = NULL;
22 rte_power_freq_change_t rte_power_freq_up = NULL;
23 rte_power_freq_change_t rte_power_freq_down = NULL;
24 rte_power_freq_change_t rte_power_freq_max = NULL;
25 rte_power_freq_change_t rte_power_freq_min = NULL;
26 rte_power_freq_change_t rte_power_turbo_status;
27 rte_power_freq_change_t rte_power_freq_enable_turbo;
28 rte_power_freq_change_t rte_power_freq_disable_turbo;
29 rte_power_get_capabilities_t rte_power_get_capabilities;
30
31 static void
reset_power_function_ptrs(void)32 reset_power_function_ptrs(void)
33 {
34 rte_power_freqs = NULL;
35 rte_power_get_freq = NULL;
36 rte_power_set_freq = NULL;
37 rte_power_freq_up = NULL;
38 rte_power_freq_down = NULL;
39 rte_power_freq_max = NULL;
40 rte_power_freq_min = NULL;
41 rte_power_turbo_status = NULL;
42 rte_power_freq_enable_turbo = NULL;
43 rte_power_freq_disable_turbo = NULL;
44 rte_power_get_capabilities = NULL;
45 }
46
47 int
rte_power_check_env_supported(enum power_management_env env)48 rte_power_check_env_supported(enum power_management_env env)
49 {
50 switch (env) {
51 case PM_ENV_ACPI_CPUFREQ:
52 return power_acpi_cpufreq_check_supported();
53 case PM_ENV_PSTATE_CPUFREQ:
54 return power_pstate_cpufreq_check_supported();
55 case PM_ENV_KVM_VM:
56 return power_kvm_vm_check_supported();
57 default:
58 rte_errno = EINVAL;
59 return -1;
60 }
61 }
62
63 int
rte_power_set_env(enum power_management_env env)64 rte_power_set_env(enum power_management_env env)
65 {
66 rte_spinlock_lock(&global_env_cfg_lock);
67
68 if (global_default_env != PM_ENV_NOT_SET) {
69 RTE_LOG(ERR, POWER, "Power Management Environment already set.\n");
70 rte_spinlock_unlock(&global_env_cfg_lock);
71 return -1;
72 }
73
74 int ret = 0;
75
76 if (env == PM_ENV_ACPI_CPUFREQ) {
77 rte_power_freqs = power_acpi_cpufreq_freqs;
78 rte_power_get_freq = power_acpi_cpufreq_get_freq;
79 rte_power_set_freq = power_acpi_cpufreq_set_freq;
80 rte_power_freq_up = power_acpi_cpufreq_freq_up;
81 rte_power_freq_down = power_acpi_cpufreq_freq_down;
82 rte_power_freq_min = power_acpi_cpufreq_freq_min;
83 rte_power_freq_max = power_acpi_cpufreq_freq_max;
84 rte_power_turbo_status = power_acpi_turbo_status;
85 rte_power_freq_enable_turbo = power_acpi_enable_turbo;
86 rte_power_freq_disable_turbo = power_acpi_disable_turbo;
87 rte_power_get_capabilities = power_acpi_get_capabilities;
88 } else if (env == PM_ENV_KVM_VM) {
89 rte_power_freqs = power_kvm_vm_freqs;
90 rte_power_get_freq = power_kvm_vm_get_freq;
91 rte_power_set_freq = power_kvm_vm_set_freq;
92 rte_power_freq_up = power_kvm_vm_freq_up;
93 rte_power_freq_down = power_kvm_vm_freq_down;
94 rte_power_freq_min = power_kvm_vm_freq_min;
95 rte_power_freq_max = power_kvm_vm_freq_max;
96 rte_power_turbo_status = power_kvm_vm_turbo_status;
97 rte_power_freq_enable_turbo = power_kvm_vm_enable_turbo;
98 rte_power_freq_disable_turbo = power_kvm_vm_disable_turbo;
99 rte_power_get_capabilities = power_kvm_vm_get_capabilities;
100 } else if (env == PM_ENV_PSTATE_CPUFREQ) {
101 rte_power_freqs = power_pstate_cpufreq_freqs;
102 rte_power_get_freq = power_pstate_cpufreq_get_freq;
103 rte_power_set_freq = power_pstate_cpufreq_set_freq;
104 rte_power_freq_up = power_pstate_cpufreq_freq_up;
105 rte_power_freq_down = power_pstate_cpufreq_freq_down;
106 rte_power_freq_min = power_pstate_cpufreq_freq_min;
107 rte_power_freq_max = power_pstate_cpufreq_freq_max;
108 rte_power_turbo_status = power_pstate_turbo_status;
109 rte_power_freq_enable_turbo = power_pstate_enable_turbo;
110 rte_power_freq_disable_turbo = power_pstate_disable_turbo;
111 rte_power_get_capabilities = power_pstate_get_capabilities;
112
113 } else {
114 RTE_LOG(ERR, POWER, "Invalid Power Management Environment(%d) set\n",
115 env);
116 ret = -1;
117 }
118
119 if (ret == 0)
120 global_default_env = env;
121 else {
122 global_default_env = PM_ENV_NOT_SET;
123 reset_power_function_ptrs();
124 }
125
126 rte_spinlock_unlock(&global_env_cfg_lock);
127 return ret;
128 }
129
130 void
rte_power_unset_env(void)131 rte_power_unset_env(void)
132 {
133 rte_spinlock_lock(&global_env_cfg_lock);
134 global_default_env = PM_ENV_NOT_SET;
135 reset_power_function_ptrs();
136 rte_spinlock_unlock(&global_env_cfg_lock);
137 }
138
139 enum power_management_env
rte_power_get_env(void)140 rte_power_get_env(void) {
141 return global_default_env;
142 }
143
144 int
rte_power_init(unsigned int lcore_id)145 rte_power_init(unsigned int lcore_id)
146 {
147 int ret = -1;
148
149 switch (global_default_env) {
150 case PM_ENV_ACPI_CPUFREQ:
151 return power_acpi_cpufreq_init(lcore_id);
152 case PM_ENV_KVM_VM:
153 return power_kvm_vm_init(lcore_id);
154 case PM_ENV_PSTATE_CPUFREQ:
155 return power_pstate_cpufreq_init(lcore_id);
156 default:
157 RTE_LOG(INFO, POWER, "Env isn't set yet!\n");
158 }
159
160 /* Auto detect Environment */
161 RTE_LOG(INFO, POWER, "Attempting to initialise ACPI cpufreq power management...\n");
162 ret = power_acpi_cpufreq_init(lcore_id);
163 if (ret == 0) {
164 rte_power_set_env(PM_ENV_ACPI_CPUFREQ);
165 goto out;
166 }
167
168 RTE_LOG(INFO, POWER, "Attempting to initialise PSTAT power management...\n");
169 ret = power_pstate_cpufreq_init(lcore_id);
170 if (ret == 0) {
171 rte_power_set_env(PM_ENV_PSTATE_CPUFREQ);
172 goto out;
173 }
174
175 RTE_LOG(INFO, POWER, "Attempting to initialise VM power management...\n");
176 ret = power_kvm_vm_init(lcore_id);
177 if (ret == 0) {
178 rte_power_set_env(PM_ENV_KVM_VM);
179 goto out;
180 }
181 RTE_LOG(ERR, POWER, "Unable to set Power Management Environment for lcore "
182 "%u\n", lcore_id);
183 out:
184 return ret;
185 }
186
187 int
rte_power_exit(unsigned int lcore_id)188 rte_power_exit(unsigned int lcore_id)
189 {
190 switch (global_default_env) {
191 case PM_ENV_ACPI_CPUFREQ:
192 return power_acpi_cpufreq_exit(lcore_id);
193 case PM_ENV_KVM_VM:
194 return power_kvm_vm_exit(lcore_id);
195 case PM_ENV_PSTATE_CPUFREQ:
196 return power_pstate_cpufreq_exit(lcore_id);
197 default:
198 RTE_LOG(ERR, POWER, "Environment has not been set, unable to exit gracefully\n");
199
200 }
201 return -1;
202
203 }
204