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1 | /*- |
2 | * BSD LICENSE | |
3 | * | |
4 | * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * * Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * * Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in | |
15 | * the documentation and/or other materials provided with the | |
16 | * distribution. | |
17 | * * Neither the name of Intel Corporation nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
22 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
24 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
25 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
26 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
27 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
28 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
29 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #include <rte_atomic.h> | |
35 | ||
36 | #include "rte_power.h" | |
37 | #include "rte_power_acpi_cpufreq.h" | |
38 | #include "rte_power_kvm_vm.h" | |
39 | #include "rte_power_common.h" | |
40 | ||
41 | enum power_management_env global_default_env = PM_ENV_NOT_SET; | |
42 | ||
43 | volatile uint32_t global_env_cfg_status = 0; | |
44 | ||
45 | /* function pointers */ | |
46 | rte_power_freqs_t rte_power_freqs = NULL; | |
47 | rte_power_get_freq_t rte_power_get_freq = NULL; | |
48 | rte_power_set_freq_t rte_power_set_freq = NULL; | |
49 | rte_power_freq_change_t rte_power_freq_up = NULL; | |
50 | rte_power_freq_change_t rte_power_freq_down = NULL; | |
51 | rte_power_freq_change_t rte_power_freq_max = NULL; | |
52 | rte_power_freq_change_t rte_power_freq_min = NULL; | |
53 | ||
54 | int | |
55 | rte_power_set_env(enum power_management_env env) | |
56 | { | |
57 | if (rte_atomic32_cmpset(&global_env_cfg_status, 0, 1) == 0) { | |
58 | return 0; | |
59 | } | |
60 | if (env == PM_ENV_ACPI_CPUFREQ) { | |
61 | rte_power_freqs = rte_power_acpi_cpufreq_freqs; | |
62 | rte_power_get_freq = rte_power_acpi_cpufreq_get_freq; | |
63 | rte_power_set_freq = rte_power_acpi_cpufreq_set_freq; | |
64 | rte_power_freq_up = rte_power_acpi_cpufreq_freq_up; | |
65 | rte_power_freq_down = rte_power_acpi_cpufreq_freq_down; | |
66 | rte_power_freq_min = rte_power_acpi_cpufreq_freq_min; | |
67 | rte_power_freq_max = rte_power_acpi_cpufreq_freq_max; | |
68 | } else if (env == PM_ENV_KVM_VM) { | |
69 | rte_power_freqs = rte_power_kvm_vm_freqs; | |
70 | rte_power_get_freq = rte_power_kvm_vm_get_freq; | |
71 | rte_power_set_freq = rte_power_kvm_vm_set_freq; | |
72 | rte_power_freq_up = rte_power_kvm_vm_freq_up; | |
73 | rte_power_freq_down = rte_power_kvm_vm_freq_down; | |
74 | rte_power_freq_min = rte_power_kvm_vm_freq_min; | |
75 | rte_power_freq_max = rte_power_kvm_vm_freq_max; | |
76 | } else { | |
77 | RTE_LOG(ERR, POWER, "Invalid Power Management Environment(%d) set\n", | |
78 | env); | |
79 | rte_power_unset_env(); | |
80 | return -1; | |
81 | } | |
82 | global_default_env = env; | |
83 | return 0; | |
84 | ||
85 | } | |
86 | ||
87 | void | |
88 | rte_power_unset_env(void) | |
89 | { | |
90 | if (rte_atomic32_cmpset(&global_env_cfg_status, 1, 0) != 0) | |
91 | global_default_env = PM_ENV_NOT_SET; | |
92 | } | |
93 | ||
94 | enum power_management_env | |
95 | rte_power_get_env(void) { | |
96 | return global_default_env; | |
97 | } | |
98 | ||
99 | int | |
100 | rte_power_init(unsigned lcore_id) | |
101 | { | |
102 | int ret = -1; | |
103 | ||
104 | if (global_default_env == PM_ENV_ACPI_CPUFREQ) { | |
105 | return rte_power_acpi_cpufreq_init(lcore_id); | |
106 | } | |
107 | if (global_default_env == PM_ENV_KVM_VM) { | |
108 | return rte_power_kvm_vm_init(lcore_id); | |
109 | } | |
110 | /* Auto detect Environment */ | |
111 | RTE_LOG(INFO, POWER, "Attempting to initialise ACPI cpufreq power " | |
112 | "management...\n"); | |
113 | ret = rte_power_acpi_cpufreq_init(lcore_id); | |
114 | if (ret == 0) { | |
115 | rte_power_set_env(PM_ENV_ACPI_CPUFREQ); | |
116 | goto out; | |
117 | } | |
118 | ||
119 | RTE_LOG(INFO, POWER, "Attempting to initialise VM power management...\n"); | |
120 | ret = rte_power_kvm_vm_init(lcore_id); | |
121 | if (ret == 0) { | |
122 | rte_power_set_env(PM_ENV_KVM_VM); | |
123 | goto out; | |
124 | } | |
125 | RTE_LOG(ERR, POWER, "Unable to set Power Management Environment for lcore " | |
126 | "%u\n", lcore_id); | |
127 | out: | |
128 | return ret; | |
129 | } | |
130 | ||
131 | int | |
132 | rte_power_exit(unsigned lcore_id) | |
133 | { | |
134 | if (global_default_env == PM_ENV_ACPI_CPUFREQ) | |
135 | return rte_power_acpi_cpufreq_exit(lcore_id); | |
136 | if (global_default_env == PM_ENV_KVM_VM) | |
137 | return rte_power_kvm_vm_exit(lcore_id); | |
138 | ||
139 | RTE_LOG(ERR, POWER, "Environment has not been set, unable to exit " | |
140 | "gracefully\n"); | |
141 | return -1; | |
142 | ||
143 | } |