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f721889f RW |
1 | /* |
2 | * pm_domain.h - Definitions and headers related to device power domains. | |
3 | * | |
4 | * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp. | |
5 | * | |
6 | * This file is released under the GPLv2. | |
7 | */ | |
8 | ||
9 | #ifndef _LINUX_PM_DOMAIN_H | |
10 | #define _LINUX_PM_DOMAIN_H | |
11 | ||
12 | #include <linux/device.h> | |
313162d0 PG |
13 | #include <linux/mutex.h> |
14 | #include <linux/pm.h> | |
4f042cda | 15 | #include <linux/err.h> |
c8aa130b | 16 | #include <linux/of.h> |
6ff7bb0d | 17 | #include <linux/notifier.h> |
cbc9ef02 | 18 | #include <linux/cpuidle.h> |
f721889f | 19 | |
17b75eca RW |
20 | enum gpd_status { |
21 | GPD_STATE_ACTIVE = 0, /* PM domain is active */ | |
17877eb5 | 22 | GPD_STATE_WAIT_MASTER, /* PM domain's master is being waited for */ |
17b75eca | 23 | GPD_STATE_BUSY, /* Something is happening to the PM domain */ |
c6d22b37 | 24 | GPD_STATE_REPEAT, /* Power off in progress, to be repeated */ |
17b75eca RW |
25 | GPD_STATE_POWER_OFF, /* PM domain is off */ |
26 | }; | |
596ba34b | 27 | |
f721889f RW |
28 | struct dev_power_governor { |
29 | bool (*power_down_ok)(struct dev_pm_domain *domain); | |
b02c999a | 30 | bool (*stop_ok)(struct device *dev); |
f721889f RW |
31 | }; |
32 | ||
d5e4cbfe RW |
33 | struct gpd_dev_ops { |
34 | int (*start)(struct device *dev); | |
35 | int (*stop)(struct device *dev); | |
ecf00475 RW |
36 | int (*save_state)(struct device *dev); |
37 | int (*restore_state)(struct device *dev); | |
d5e4cbfe RW |
38 | bool (*active_wakeup)(struct device *dev); |
39 | }; | |
40 | ||
cbc9ef02 RW |
41 | struct gpd_cpu_data { |
42 | unsigned int saved_exit_latency; | |
43 | struct cpuidle_state *idle_state; | |
44 | }; | |
45 | ||
f721889f RW |
46 | struct generic_pm_domain { |
47 | struct dev_pm_domain domain; /* PM domain operations */ | |
5125bbf3 | 48 | struct list_head gpd_list_node; /* Node in the global PM domains list */ |
5063ce15 RW |
49 | struct list_head master_links; /* Links with PM domain as a master */ |
50 | struct list_head slave_links; /* Links with PM domain as a slave */ | |
f721889f RW |
51 | struct list_head dev_list; /* List of devices */ |
52 | struct mutex lock; | |
53 | struct dev_power_governor *gov; | |
54 | struct work_struct power_off_work; | |
d07e9c17 | 55 | const char *name; |
f721889f | 56 | unsigned int in_progress; /* Number of devices being suspended now */ |
c4bb3160 | 57 | atomic_t sd_count; /* Number of subdomains with power "on" */ |
17b75eca RW |
58 | enum gpd_status status; /* Current state of the domain */ |
59 | wait_queue_head_t status_wait_queue; | |
c6d22b37 RW |
60 | struct task_struct *poweroff_task; /* Powering off task */ |
61 | unsigned int resume_count; /* Number of devices being resumed */ | |
596ba34b RW |
62 | unsigned int device_count; /* Number of devices */ |
63 | unsigned int suspended_count; /* System suspend device counter */ | |
64 | unsigned int prepared_count; /* Suspend counter of prepared devices */ | |
65 | bool suspend_power_off; /* Power status before system suspend */ | |
f721889f | 66 | int (*power_off)(struct generic_pm_domain *domain); |
221e9b58 | 67 | s64 power_off_latency_ns; |
f721889f | 68 | int (*power_on)(struct generic_pm_domain *domain); |
221e9b58 | 69 | s64 power_on_latency_ns; |
d5e4cbfe | 70 | struct gpd_dev_ops dev_ops; |
221e9b58 | 71 | s64 max_off_time_ns; /* Maximum allowed "suspended" time. */ |
6ff7bb0d RW |
72 | bool max_off_time_changed; |
73 | bool cached_power_down_ok; | |
c8aa130b | 74 | struct device_node *of_node; /* Node in device tree */ |
cbc9ef02 | 75 | struct gpd_cpu_data *cpu_data; |
f721889f RW |
76 | }; |
77 | ||
596ba34b RW |
78 | static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd) |
79 | { | |
80 | return container_of(pd, struct generic_pm_domain, domain); | |
81 | } | |
82 | ||
5063ce15 RW |
83 | struct gpd_link { |
84 | struct generic_pm_domain *master; | |
85 | struct list_head master_node; | |
86 | struct generic_pm_domain *slave; | |
87 | struct list_head slave_node; | |
88 | }; | |
89 | ||
b02c999a RW |
90 | struct gpd_timing_data { |
91 | s64 stop_latency_ns; | |
92 | s64 start_latency_ns; | |
221e9b58 RW |
93 | s64 save_state_latency_ns; |
94 | s64 restore_state_latency_ns; | |
a5bef810 | 95 | s64 effective_constraint_ns; |
6ff7bb0d RW |
96 | bool constraint_changed; |
97 | bool cached_stop_ok; | |
b02c999a RW |
98 | }; |
99 | ||
cd0ea672 RW |
100 | struct generic_pm_domain_data { |
101 | struct pm_domain_data base; | |
b02c999a | 102 | struct gpd_timing_data td; |
6ff7bb0d RW |
103 | struct notifier_block nb; |
104 | struct mutex lock; | |
1d5fcfec | 105 | unsigned int refcount; |
cd0ea672 RW |
106 | bool need_restore; |
107 | }; | |
108 | ||
9b4f617b | 109 | #ifdef CONFIG_PM_GENERIC_DOMAINS |
cd0ea672 RW |
110 | static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd) |
111 | { | |
112 | return container_of(pdd, struct generic_pm_domain_data, base); | |
113 | } | |
114 | ||
d5e4cbfe RW |
115 | static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev) |
116 | { | |
117 | return to_gpd_data(dev->power.subsys_data->domain_data); | |
118 | } | |
119 | ||
b02c999a RW |
120 | extern struct generic_pm_domain *dev_to_genpd(struct device *dev); |
121 | extern int __pm_genpd_add_device(struct generic_pm_domain *genpd, | |
122 | struct device *dev, | |
123 | struct gpd_timing_data *td); | |
124 | ||
c8aa130b TA |
125 | extern int __pm_genpd_of_add_device(struct device_node *genpd_node, |
126 | struct device *dev, | |
127 | struct gpd_timing_data *td); | |
128 | ||
b5abb085 RW |
129 | extern int __pm_genpd_name_add_device(const char *domain_name, |
130 | struct device *dev, | |
131 | struct gpd_timing_data *td); | |
c8aa130b | 132 | |
f721889f RW |
133 | extern int pm_genpd_remove_device(struct generic_pm_domain *genpd, |
134 | struct device *dev); | |
ca1d72f0 | 135 | extern void pm_genpd_dev_need_restore(struct device *dev, bool val); |
f721889f RW |
136 | extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, |
137 | struct generic_pm_domain *new_subdomain); | |
fb7268be RW |
138 | extern int pm_genpd_add_subdomain_names(const char *master_name, |
139 | const char *subdomain_name); | |
f721889f RW |
140 | extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, |
141 | struct generic_pm_domain *target); | |
40114447 | 142 | extern int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state); |
74a2799a | 143 | extern int pm_genpd_name_attach_cpuidle(const char *name, int state); |
40114447 | 144 | extern int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd); |
74a2799a | 145 | extern int pm_genpd_name_detach_cpuidle(const char *name); |
f721889f RW |
146 | extern void pm_genpd_init(struct generic_pm_domain *genpd, |
147 | struct dev_power_governor *gov, bool is_off); | |
b02c999a | 148 | |
18b4f3f5 | 149 | extern int pm_genpd_poweron(struct generic_pm_domain *genpd); |
8bc0251d | 150 | extern int pm_genpd_name_poweron(const char *domain_name); |
b02c999a | 151 | |
ae3c511c | 152 | extern struct dev_power_governor simple_qos_governor; |
925b44a2 | 153 | extern struct dev_power_governor pm_domain_always_on_gov; |
f721889f | 154 | #else |
b02c999a | 155 | |
b642631d MD |
156 | static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev) |
157 | { | |
158 | return ERR_PTR(-ENOSYS); | |
159 | } | |
b02c999a RW |
160 | static inline struct generic_pm_domain *dev_to_genpd(struct device *dev) |
161 | { | |
162 | return ERR_PTR(-ENOSYS); | |
163 | } | |
164 | static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd, | |
165 | struct device *dev, | |
166 | struct gpd_timing_data *td) | |
167 | { | |
168 | return -ENOSYS; | |
169 | } | |
b5abb085 RW |
170 | static inline int __pm_genpd_of_add_device(struct device_node *genpd_node, |
171 | struct device *dev, | |
172 | struct gpd_timing_data *td) | |
173 | { | |
174 | return -ENOSYS; | |
175 | } | |
176 | static inline int __pm_genpd_name_add_device(const char *domain_name, | |
177 | struct device *dev, | |
178 | struct gpd_timing_data *td) | |
f721889f RW |
179 | { |
180 | return -ENOSYS; | |
181 | } | |
182 | static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd, | |
183 | struct device *dev) | |
184 | { | |
185 | return -ENOSYS; | |
186 | } | |
ca1d72f0 | 187 | static inline void pm_genpd_dev_need_restore(struct device *dev, bool val) {} |
f721889f RW |
188 | static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, |
189 | struct generic_pm_domain *new_sd) | |
190 | { | |
191 | return -ENOSYS; | |
192 | } | |
fb7268be RW |
193 | static inline int pm_genpd_add_subdomain_names(const char *master_name, |
194 | const char *subdomain_name) | |
195 | { | |
196 | return -ENOSYS; | |
197 | } | |
f721889f RW |
198 | static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, |
199 | struct generic_pm_domain *target) | |
200 | { | |
201 | return -ENOSYS; | |
202 | } | |
40114447 | 203 | static inline int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int st) |
cbc9ef02 RW |
204 | { |
205 | return -ENOSYS; | |
206 | } | |
74a2799a RW |
207 | static inline int pm_genpd_name_attach_cpuidle(const char *name, int state) |
208 | { | |
209 | return -ENOSYS; | |
210 | } | |
40114447 | 211 | static inline int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd) |
cbc9ef02 RW |
212 | { |
213 | return -ENOSYS; | |
214 | } | |
74a2799a RW |
215 | static inline int pm_genpd_name_detach_cpuidle(const char *name) |
216 | { | |
217 | return -ENOSYS; | |
218 | } | |
b642631d MD |
219 | static inline void pm_genpd_init(struct generic_pm_domain *genpd, |
220 | struct dev_power_governor *gov, bool is_off) | |
b02c999a RW |
221 | { |
222 | } | |
18b4f3f5 MD |
223 | static inline int pm_genpd_poweron(struct generic_pm_domain *genpd) |
224 | { | |
225 | return -ENOSYS; | |
226 | } | |
8bc0251d RW |
227 | static inline int pm_genpd_name_poweron(const char *domain_name) |
228 | { | |
229 | return -ENOSYS; | |
230 | } | |
b642631d | 231 | #define simple_qos_governor NULL |
925b44a2 | 232 | #define pm_domain_always_on_gov NULL |
17f2ae7f RW |
233 | #endif |
234 | ||
b5abb085 RW |
235 | static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, |
236 | struct device *dev) | |
237 | { | |
238 | return __pm_genpd_add_device(genpd, dev, NULL); | |
239 | } | |
240 | ||
241 | static inline int pm_genpd_of_add_device(struct device_node *genpd_node, | |
242 | struct device *dev) | |
243 | { | |
244 | return __pm_genpd_of_add_device(genpd_node, dev, NULL); | |
245 | } | |
246 | ||
247 | static inline int pm_genpd_name_add_device(const char *domain_name, | |
248 | struct device *dev) | |
249 | { | |
250 | return __pm_genpd_name_add_device(domain_name, dev, NULL); | |
251 | } | |
252 | ||
17f2ae7f | 253 | #ifdef CONFIG_PM_GENERIC_DOMAINS_RUNTIME |
17f2ae7f RW |
254 | extern void pm_genpd_poweroff_unused(void); |
255 | #else | |
17f2ae7f | 256 | static inline void pm_genpd_poweroff_unused(void) {} |
f721889f RW |
257 | #endif |
258 | ||
77f827de | 259 | #ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP |
d47e6464 UH |
260 | extern void pm_genpd_syscore_poweroff(struct device *dev); |
261 | extern void pm_genpd_syscore_poweron(struct device *dev); | |
77f827de | 262 | #else |
d47e6464 UH |
263 | static inline void pm_genpd_syscore_poweroff(struct device *dev) {} |
264 | static inline void pm_genpd_syscore_poweron(struct device *dev) {} | |
77f827de RW |
265 | #endif |
266 | ||
f721889f | 267 | #endif /* _LINUX_PM_DOMAIN_H */ |