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_cppc_cpufreq.h"
11 #include "power_kvm_vm.h"
12 #include "power_pstate_cpufreq.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 case PM_ENV_CPPC_CPUFREQ:
58 return power_cppc_cpufreq_check_supported();
59 default:
60 rte_errno = EINVAL;
61 return -1;
62 }
63 }
64
65 int
rte_power_set_env(enum power_management_env env)66 rte_power_set_env(enum power_management_env env)
67 {
68 rte_spinlock_lock(&global_env_cfg_lock);
69
70 if (global_default_env != PM_ENV_NOT_SET) {
71 RTE_LOG(ERR, POWER, "Power Management Environment already set.\n");
72 rte_spinlock_unlock(&global_env_cfg_lock);
73 return -1;
74 }
75
76 int ret = 0;
77
78 if (env == PM_ENV_ACPI_CPUFREQ) {
79 rte_power_freqs = power_acpi_cpufreq_freqs;
80 rte_power_get_freq = power_acpi_cpufreq_get_freq;
81 rte_power_set_freq = power_acpi_cpufreq_set_freq;
82 rte_power_freq_up = power_acpi_cpufreq_freq_up;
83 rte_power_freq_down = power_acpi_cpufreq_freq_down;
84 rte_power_freq_min = power_acpi_cpufreq_freq_min;
85 rte_power_freq_max = power_acpi_cpufreq_freq_max;
86 rte_power_turbo_status = power_acpi_turbo_status;
87 rte_power_freq_enable_turbo = power_acpi_enable_turbo;
88 rte_power_freq_disable_turbo = power_acpi_disable_turbo;
89 rte_power_get_capabilities = power_acpi_get_capabilities;
90 } else if (env == PM_ENV_KVM_VM) {
91 rte_power_freqs = power_kvm_vm_freqs;
92 rte_power_get_freq = power_kvm_vm_get_freq;
93 rte_power_set_freq = power_kvm_vm_set_freq;
94 rte_power_freq_up = power_kvm_vm_freq_up;
95 rte_power_freq_down = power_kvm_vm_freq_down;
96 rte_power_freq_min = power_kvm_vm_freq_min;
97 rte_power_freq_max = power_kvm_vm_freq_max;
98 rte_power_turbo_status = power_kvm_vm_turbo_status;
99 rte_power_freq_enable_turbo = power_kvm_vm_enable_turbo;
100 rte_power_freq_disable_turbo = power_kvm_vm_disable_turbo;
101 rte_power_get_capabilities = power_kvm_vm_get_capabilities;
102 } else if (env == PM_ENV_PSTATE_CPUFREQ) {
103 rte_power_freqs = power_pstate_cpufreq_freqs;
104 rte_power_get_freq = power_pstate_cpufreq_get_freq;
105 rte_power_set_freq = power_pstate_cpufreq_set_freq;
106 rte_power_freq_up = power_pstate_cpufreq_freq_up;
107 rte_power_freq_down = power_pstate_cpufreq_freq_down;
108 rte_power_freq_min = power_pstate_cpufreq_freq_min;
109 rte_power_freq_max = power_pstate_cpufreq_freq_max;
110 rte_power_turbo_status = power_pstate_turbo_status;
111 rte_power_freq_enable_turbo = power_pstate_enable_turbo;
112 rte_power_freq_disable_turbo = power_pstate_disable_turbo;
113 rte_power_get_capabilities = power_pstate_get_capabilities;
114
115 } else if (env == PM_ENV_CPPC_CPUFREQ) {
116 rte_power_freqs = power_cppc_cpufreq_freqs;
117 rte_power_get_freq = power_cppc_cpufreq_get_freq;
118 rte_power_set_freq = power_cppc_cpufreq_set_freq;
119 rte_power_freq_up = power_cppc_cpufreq_freq_up;
120 rte_power_freq_down = power_cppc_cpufreq_freq_down;
121 rte_power_freq_min = power_cppc_cpufreq_freq_min;
122 rte_power_freq_max = power_cppc_cpufreq_freq_max;
123 rte_power_turbo_status = power_cppc_turbo_status;
124 rte_power_freq_enable_turbo = power_cppc_enable_turbo;
125 rte_power_freq_disable_turbo = power_cppc_disable_turbo;
126 rte_power_get_capabilities = power_cppc_get_capabilities;
127 } else {
128 RTE_LOG(ERR, POWER, "Invalid Power Management Environment(%d) set\n",
129 env);
130 ret = -1;
131 }
132
133 if (ret == 0)
134 global_default_env = env;
135 else {
136 global_default_env = PM_ENV_NOT_SET;
137 reset_power_function_ptrs();
138 }
139
140 rte_spinlock_unlock(&global_env_cfg_lock);
141 return ret;
142 }
143
144 void
rte_power_unset_env(void)145 rte_power_unset_env(void)
146 {
147 rte_spinlock_lock(&global_env_cfg_lock);
148 global_default_env = PM_ENV_NOT_SET;
149 reset_power_function_ptrs();
150 rte_spinlock_unlock(&global_env_cfg_lock);
151 }
152
153 enum power_management_env
rte_power_get_env(void)154 rte_power_get_env(void) {
155 return global_default_env;
156 }
157
158 int
rte_power_init(unsigned int lcore_id)159 rte_power_init(unsigned int lcore_id)
160 {
161 int ret = -1;
162
163 switch (global_default_env) {
164 case PM_ENV_ACPI_CPUFREQ:
165 return power_acpi_cpufreq_init(lcore_id);
166 case PM_ENV_KVM_VM:
167 return power_kvm_vm_init(lcore_id);
168 case PM_ENV_PSTATE_CPUFREQ:
169 return power_pstate_cpufreq_init(lcore_id);
170 case PM_ENV_CPPC_CPUFREQ:
171 return power_cppc_cpufreq_init(lcore_id);
172 default:
173 RTE_LOG(INFO, POWER, "Env isn't set yet!\n");
174 }
175
176 /* Auto detect Environment */
177 RTE_LOG(INFO, POWER, "Attempting to initialise ACPI cpufreq power management...\n");
178 ret = power_acpi_cpufreq_init(lcore_id);
179 if (ret == 0) {
180 rte_power_set_env(PM_ENV_ACPI_CPUFREQ);
181 goto out;
182 }
183
184 RTE_LOG(INFO, POWER, "Attempting to initialise PSTAT power management...\n");
185 ret = power_pstate_cpufreq_init(lcore_id);
186 if (ret == 0) {
187 rte_power_set_env(PM_ENV_PSTATE_CPUFREQ);
188 goto out;
189 }
190
191 RTE_LOG(INFO, POWER, "Attempting to initialise CPPC power management...\n");
192 ret = power_cppc_cpufreq_init(lcore_id);
193 if (ret == 0) {
194 rte_power_set_env(PM_ENV_CPPC_CPUFREQ);
195 goto out;
196 }
197
198 RTE_LOG(INFO, POWER, "Attempting to initialise VM power management...\n");
199 ret = power_kvm_vm_init(lcore_id);
200 if (ret == 0) {
201 rte_power_set_env(PM_ENV_KVM_VM);
202 goto out;
203 }
204 RTE_LOG(ERR, POWER, "Unable to set Power Management Environment for lcore "
205 "%u\n", lcore_id);
206 out:
207 return ret;
208 }
209
210 int
rte_power_exit(unsigned int lcore_id)211 rte_power_exit(unsigned int lcore_id)
212 {
213 switch (global_default_env) {
214 case PM_ENV_ACPI_CPUFREQ:
215 return power_acpi_cpufreq_exit(lcore_id);
216 case PM_ENV_KVM_VM:
217 return power_kvm_vm_exit(lcore_id);
218 case PM_ENV_PSTATE_CPUFREQ:
219 return power_pstate_cpufreq_exit(lcore_id);
220 case PM_ENV_CPPC_CPUFREQ:
221 return power_cppc_cpufreq_exit(lcore_id);
222 default:
223 RTE_LOG(ERR, POWER, "Environment has not been set, unable to exit gracefully\n");
224
225 }
226 return -1;
227
228 }
229