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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> |
d716f479 | 18 | #include <linux/spinlock.h> |
f721889f | 19 | |
e5089c2c UH |
20 | /* |
21 | * Flags to control the behaviour of a genpd. | |
22 | * | |
23 | * These flags may be set in the struct generic_pm_domain's flags field by a | |
24 | * genpd backend driver. The flags must be set before it calls pm_genpd_init(), | |
25 | * which initializes a genpd. | |
26 | * | |
27 | * GENPD_FLAG_PM_CLK: Instructs genpd to use the PM clk framework, | |
28 | * while powering on/off attached devices. | |
29 | * | |
30 | * GENPD_FLAG_IRQ_SAFE: This informs genpd that its backend callbacks, | |
31 | * ->power_on|off(), doesn't sleep. Hence, these | |
32 | * can be invoked from within atomic context, which | |
33 | * enables genpd to power on/off the PM domain, | |
34 | * even when pm_runtime_is_irq_safe() returns true, | |
35 | * for any of its attached devices. Note that, a | |
36 | * genpd having this flag set, requires its | |
37 | * masterdomains to also have it set. | |
38 | * | |
39 | * GENPD_FLAG_ALWAYS_ON: Instructs genpd to always keep the PM domain | |
40 | * powered on. | |
41 | * | |
42 | * GENPD_FLAG_ACTIVE_WAKEUP: Instructs genpd to keep the PM domain powered | |
43 | * on, in case any of its attached devices is used | |
44 | * in the wakeup path to serve system wakeups. | |
45 | */ | |
46 | #define GENPD_FLAG_PM_CLK (1U << 0) | |
47 | #define GENPD_FLAG_IRQ_SAFE (1U << 1) | |
48 | #define GENPD_FLAG_ALWAYS_ON (1U << 2) | |
49 | #define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3) | |
c11f6f5b | 50 | |
17b75eca RW |
51 | enum gpd_status { |
52 | GPD_STATE_ACTIVE = 0, /* PM domain is active */ | |
17b75eca RW |
53 | GPD_STATE_POWER_OFF, /* PM domain is off */ |
54 | }; | |
596ba34b | 55 | |
f721889f RW |
56 | struct dev_power_governor { |
57 | bool (*power_down_ok)(struct dev_pm_domain *domain); | |
9df3921e | 58 | bool (*suspend_ok)(struct device *dev); |
f721889f RW |
59 | }; |
60 | ||
d5e4cbfe RW |
61 | struct gpd_dev_ops { |
62 | int (*start)(struct device *dev); | |
63 | int (*stop)(struct device *dev); | |
d5e4cbfe RW |
64 | }; |
65 | ||
fc5cbf0c AH |
66 | struct genpd_power_state { |
67 | s64 power_off_latency_ns; | |
68 | s64 power_on_latency_ns; | |
405f7226 | 69 | s64 residency_ns; |
0c9b694a | 70 | struct fwnode_handle *fwnode; |
afece3ab | 71 | ktime_t idle_time; |
fc5cbf0c AH |
72 | }; |
73 | ||
35241d12 | 74 | struct genpd_lock_ops; |
6e41766a | 75 | struct dev_pm_opp; |
1067ae3e | 76 | struct opp_table; |
35241d12 | 77 | |
f721889f | 78 | struct generic_pm_domain { |
401ea157 | 79 | struct device dev; |
f721889f | 80 | struct dev_pm_domain domain; /* PM domain operations */ |
5125bbf3 | 81 | struct list_head gpd_list_node; /* Node in the global PM domains list */ |
5063ce15 RW |
82 | struct list_head master_links; /* Links with PM domain as a master */ |
83 | struct list_head slave_links; /* Links with PM domain as a slave */ | |
f721889f | 84 | struct list_head dev_list; /* List of devices */ |
f721889f RW |
85 | struct dev_power_governor *gov; |
86 | struct work_struct power_off_work; | |
de0aa06d JH |
87 | struct fwnode_handle *provider; /* Identity of the domain provider */ |
88 | bool has_provider; | |
d07e9c17 | 89 | const char *name; |
c4bb3160 | 90 | atomic_t sd_count; /* Number of subdomains with power "on" */ |
17b75eca | 91 | enum gpd_status status; /* Current state of the domain */ |
596ba34b RW |
92 | unsigned int device_count; /* Number of devices */ |
93 | unsigned int suspended_count; /* System suspend device counter */ | |
94 | unsigned int prepared_count; /* Suspend counter of prepared devices */ | |
42f6284a | 95 | unsigned int performance_state; /* Aggregated max performance state */ |
f721889f RW |
96 | int (*power_off)(struct generic_pm_domain *domain); |
97 | int (*power_on)(struct generic_pm_domain *domain); | |
1067ae3e | 98 | struct opp_table *opp_table; /* OPP table of the genpd */ |
6e41766a VK |
99 | unsigned int (*opp_to_performance_state)(struct generic_pm_domain *genpd, |
100 | struct dev_pm_opp *opp); | |
42f6284a VK |
101 | int (*set_performance_state)(struct generic_pm_domain *genpd, |
102 | unsigned int state); | |
d5e4cbfe | 103 | struct gpd_dev_ops dev_ops; |
221e9b58 | 104 | s64 max_off_time_ns; /* Maximum allowed "suspended" time. */ |
6ff7bb0d RW |
105 | bool max_off_time_changed; |
106 | bool cached_power_down_ok; | |
c16561e8 UH |
107 | int (*attach_dev)(struct generic_pm_domain *domain, |
108 | struct device *dev); | |
109 | void (*detach_dev)(struct generic_pm_domain *domain, | |
110 | struct device *dev); | |
c11f6f5b | 111 | unsigned int flags; /* Bit field of configs for genpd */ |
59d65b73 | 112 | struct genpd_power_state *states; |
fc5cbf0c AH |
113 | unsigned int state_count; /* number of states */ |
114 | unsigned int state_idx; /* state that genpd will go to when off */ | |
59d65b73 | 115 | void *free; /* Free the state that was allocated for default */ |
afece3ab TG |
116 | ktime_t on_time; |
117 | ktime_t accounting_time; | |
35241d12 | 118 | const struct genpd_lock_ops *lock_ops; |
d716f479 LI |
119 | union { |
120 | struct mutex mlock; | |
121 | struct { | |
122 | spinlock_t slock; | |
123 | unsigned long lock_flags; | |
124 | }; | |
125 | }; | |
fc5cbf0c | 126 | |
f721889f RW |
127 | }; |
128 | ||
596ba34b RW |
129 | static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd) |
130 | { | |
131 | return container_of(pd, struct generic_pm_domain, domain); | |
132 | } | |
133 | ||
5063ce15 RW |
134 | struct gpd_link { |
135 | struct generic_pm_domain *master; | |
136 | struct list_head master_node; | |
137 | struct generic_pm_domain *slave; | |
138 | struct list_head slave_node; | |
18edf49c VK |
139 | |
140 | /* Sub-domain's per-master domain performance state */ | |
141 | unsigned int performance_state; | |
142 | unsigned int prev_performance_state; | |
5063ce15 RW |
143 | }; |
144 | ||
b02c999a | 145 | struct gpd_timing_data { |
2b1d88cd UH |
146 | s64 suspend_latency_ns; |
147 | s64 resume_latency_ns; | |
a5bef810 | 148 | s64 effective_constraint_ns; |
6ff7bb0d | 149 | bool constraint_changed; |
9df3921e | 150 | bool cached_suspend_ok; |
b02c999a RW |
151 | }; |
152 | ||
00e7c295 UH |
153 | struct pm_domain_data { |
154 | struct list_head list_node; | |
155 | struct device *dev; | |
156 | }; | |
157 | ||
cd0ea672 RW |
158 | struct generic_pm_domain_data { |
159 | struct pm_domain_data base; | |
b02c999a | 160 | struct gpd_timing_data td; |
6ff7bb0d | 161 | struct notifier_block nb; |
42f6284a | 162 | unsigned int performance_state; |
a5ea7a0f | 163 | void *data; |
cd0ea672 RW |
164 | }; |
165 | ||
9b4f617b | 166 | #ifdef CONFIG_PM_GENERIC_DOMAINS |
cd0ea672 RW |
167 | static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd) |
168 | { | |
169 | return container_of(pdd, struct generic_pm_domain_data, base); | |
170 | } | |
171 | ||
d5e4cbfe RW |
172 | static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev) |
173 | { | |
174 | return to_gpd_data(dev->power.subsys_data->domain_data); | |
175 | } | |
176 | ||
1a7a6707 | 177 | int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev); |
924f4486 | 178 | int pm_genpd_remove_device(struct device *dev); |
781b9d6b UH |
179 | int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, |
180 | struct generic_pm_domain *new_subdomain); | |
181 | int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | |
182 | struct generic_pm_domain *target); | |
183 | int pm_genpd_init(struct generic_pm_domain *genpd, | |
184 | struct dev_power_governor *gov, bool is_off); | |
185 | int pm_genpd_remove(struct generic_pm_domain *genpd); | |
186 | int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state); | |
b02c999a | 187 | |
ae3c511c | 188 | extern struct dev_power_governor simple_qos_governor; |
925b44a2 | 189 | extern struct dev_power_governor pm_domain_always_on_gov; |
f721889f | 190 | #else |
b02c999a | 191 | |
b642631d MD |
192 | static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev) |
193 | { | |
194 | return ERR_PTR(-ENOSYS); | |
195 | } | |
1a7a6707 UH |
196 | static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, |
197 | struct device *dev) | |
b02c999a RW |
198 | { |
199 | return -ENOSYS; | |
200 | } | |
924f4486 | 201 | static inline int pm_genpd_remove_device(struct device *dev) |
f721889f RW |
202 | { |
203 | return -ENOSYS; | |
204 | } | |
205 | static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, | |
206 | struct generic_pm_domain *new_sd) | |
207 | { | |
208 | return -ENOSYS; | |
209 | } | |
210 | static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | |
211 | struct generic_pm_domain *target) | |
212 | { | |
213 | return -ENOSYS; | |
214 | } | |
7eb231c3 UH |
215 | static inline int pm_genpd_init(struct generic_pm_domain *genpd, |
216 | struct dev_power_governor *gov, bool is_off) | |
b02c999a | 217 | { |
7eb231c3 | 218 | return -ENOSYS; |
b02c999a | 219 | } |
3fe57710 JH |
220 | static inline int pm_genpd_remove(struct generic_pm_domain *genpd) |
221 | { | |
222 | return -ENOTSUPP; | |
223 | } | |
16d0bf18 | 224 | |
42f6284a VK |
225 | static inline int dev_pm_genpd_set_performance_state(struct device *dev, |
226 | unsigned int state) | |
227 | { | |
228 | return -ENOTSUPP; | |
229 | } | |
230 | ||
16d0bf18 GU |
231 | #define simple_qos_governor (*(struct dev_power_governor *)(NULL)) |
232 | #define pm_domain_always_on_gov (*(struct dev_power_governor *)(NULL)) | |
17f2ae7f RW |
233 | #endif |
234 | ||
77f827de | 235 | #ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP |
781b9d6b UH |
236 | void pm_genpd_syscore_poweroff(struct device *dev); |
237 | void pm_genpd_syscore_poweron(struct device *dev); | |
77f827de | 238 | #else |
d47e6464 UH |
239 | static inline void pm_genpd_syscore_poweroff(struct device *dev) {} |
240 | static inline void pm_genpd_syscore_poweron(struct device *dev) {} | |
77f827de RW |
241 | #endif |
242 | ||
aa42240a TF |
243 | /* OF PM domain providers */ |
244 | struct of_device_id; | |
245 | ||
40845524 TR |
246 | typedef struct generic_pm_domain *(*genpd_xlate_t)(struct of_phandle_args *args, |
247 | void *data); | |
248 | ||
aa42240a TF |
249 | struct genpd_onecell_data { |
250 | struct generic_pm_domain **domains; | |
251 | unsigned int num_domains; | |
40845524 | 252 | genpd_xlate_t xlate; |
aa42240a TF |
253 | }; |
254 | ||
aa42240a | 255 | #ifdef CONFIG_PM_GENERIC_DOMAINS_OF |
892ebdcc JH |
256 | int of_genpd_add_provider_simple(struct device_node *np, |
257 | struct generic_pm_domain *genpd); | |
258 | int of_genpd_add_provider_onecell(struct device_node *np, | |
259 | struct genpd_onecell_data *data); | |
aa42240a | 260 | void of_genpd_del_provider(struct device_node *np); |
781b9d6b UH |
261 | int of_genpd_add_device(struct of_phandle_args *args, struct device *dev); |
262 | int of_genpd_add_subdomain(struct of_phandle_args *parent, | |
263 | struct of_phandle_args *new_subdomain); | |
264 | struct generic_pm_domain *of_genpd_remove_last(struct device_node *np); | |
265 | int of_genpd_parse_idle_states(struct device_node *dn, | |
266 | struct genpd_power_state **states, int *n); | |
e38f89d3 VK |
267 | unsigned int pm_genpd_opp_to_performance_state(struct device *genpd_dev, |
268 | struct dev_pm_opp *opp); | |
aa42240a TF |
269 | |
270 | int genpd_dev_pm_attach(struct device *dev); | |
3c095f32 UH |
271 | struct device *genpd_dev_pm_attach_by_id(struct device *dev, |
272 | unsigned int index); | |
5d6be70a | 273 | struct device *genpd_dev_pm_attach_by_name(struct device *dev, |
7416f1f2 | 274 | const char *name); |
aa42240a | 275 | #else /* !CONFIG_PM_GENERIC_DOMAINS_OF */ |
892ebdcc JH |
276 | static inline int of_genpd_add_provider_simple(struct device_node *np, |
277 | struct generic_pm_domain *genpd) | |
aa42240a | 278 | { |
892ebdcc JH |
279 | return -ENOTSUPP; |
280 | } | |
281 | ||
282 | static inline int of_genpd_add_provider_onecell(struct device_node *np, | |
283 | struct genpd_onecell_data *data) | |
284 | { | |
285 | return -ENOTSUPP; | |
aa42240a | 286 | } |
aa42240a | 287 | |
892ebdcc | 288 | static inline void of_genpd_del_provider(struct device_node *np) {} |
aa42240a | 289 | |
ec69572b JH |
290 | static inline int of_genpd_add_device(struct of_phandle_args *args, |
291 | struct device *dev) | |
292 | { | |
293 | return -ENODEV; | |
294 | } | |
295 | ||
296 | static inline int of_genpd_add_subdomain(struct of_phandle_args *parent, | |
297 | struct of_phandle_args *new_subdomain) | |
298 | { | |
299 | return -ENODEV; | |
300 | } | |
301 | ||
30f60428 LI |
302 | static inline int of_genpd_parse_idle_states(struct device_node *dn, |
303 | struct genpd_power_state **states, int *n) | |
304 | { | |
305 | return -ENODEV; | |
306 | } | |
307 | ||
e38f89d3 VK |
308 | static inline unsigned int |
309 | pm_genpd_opp_to_performance_state(struct device *genpd_dev, | |
310 | struct dev_pm_opp *opp) | |
311 | { | |
312 | return 0; | |
313 | } | |
314 | ||
aa42240a TF |
315 | static inline int genpd_dev_pm_attach(struct device *dev) |
316 | { | |
919b7308 | 317 | return 0; |
aa42240a | 318 | } |
17926551 | 319 | |
3c095f32 UH |
320 | static inline struct device *genpd_dev_pm_attach_by_id(struct device *dev, |
321 | unsigned int index) | |
322 | { | |
323 | return NULL; | |
324 | } | |
325 | ||
5d6be70a | 326 | static inline struct device *genpd_dev_pm_attach_by_name(struct device *dev, |
7416f1f2 | 327 | const char *name) |
5d6be70a UH |
328 | { |
329 | return NULL; | |
330 | } | |
331 | ||
17926551 JH |
332 | static inline |
333 | struct generic_pm_domain *of_genpd_remove_last(struct device_node *np) | |
334 | { | |
335 | return ERR_PTR(-ENOTSUPP); | |
336 | } | |
aa42240a TF |
337 | #endif /* CONFIG_PM_GENERIC_DOMAINS_OF */ |
338 | ||
f48c767c | 339 | #ifdef CONFIG_PM |
781b9d6b | 340 | int dev_pm_domain_attach(struct device *dev, bool power_on); |
82e12d9e UH |
341 | struct device *dev_pm_domain_attach_by_id(struct device *dev, |
342 | unsigned int index); | |
27dceb81 UH |
343 | struct device *dev_pm_domain_attach_by_name(struct device *dev, |
344 | char *name); | |
781b9d6b UH |
345 | void dev_pm_domain_detach(struct device *dev, bool power_off); |
346 | void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd); | |
f48c767c UH |
347 | #else |
348 | static inline int dev_pm_domain_attach(struct device *dev, bool power_on) | |
349 | { | |
919b7308 | 350 | return 0; |
f48c767c | 351 | } |
82e12d9e UH |
352 | static inline struct device *dev_pm_domain_attach_by_id(struct device *dev, |
353 | unsigned int index) | |
354 | { | |
355 | return NULL; | |
356 | } | |
27dceb81 UH |
357 | static inline struct device *dev_pm_domain_attach_by_name(struct device *dev, |
358 | char *name) | |
359 | { | |
360 | return NULL; | |
361 | } | |
f48c767c | 362 | static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {} |
989561de TV |
363 | static inline void dev_pm_domain_set(struct device *dev, |
364 | struct dev_pm_domain *pd) {} | |
f48c767c UH |
365 | #endif |
366 | ||
f721889f | 367 | #endif /* _LINUX_PM_DOMAIN_H */ |