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95d9ffbe RW |
1 | #ifndef _LINUX_SUSPEND_H |
2 | #define _LINUX_SUSPEND_H | |
1da177e4 | 3 | |
543b9fd3 | 4 | #if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64) |
1da177e4 LT |
5 | #include <asm/suspend.h> |
6 | #endif | |
7 | #include <linux/swap.h> | |
8 | #include <linux/notifier.h> | |
1da177e4 LT |
9 | #include <linux/init.h> |
10 | #include <linux/pm.h> | |
7be98234 | 11 | #include <linux/mm.h> |
95d9ffbe RW |
12 | #include <asm/errno.h> |
13 | ||
14 | #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) | |
15 | extern int pm_prepare_console(void); | |
16 | extern void pm_restore_console(void); | |
17 | #else | |
18 | static inline int pm_prepare_console(void) { return 0; } | |
19 | static inline void pm_restore_console(void) {} | |
20 | #endif | |
21 | ||
22 | typedef int __bitwise suspend_state_t; | |
23 | ||
24 | #define PM_SUSPEND_ON ((__force suspend_state_t) 0) | |
25 | #define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1) | |
26 | #define PM_SUSPEND_MEM ((__force suspend_state_t) 3) | |
27 | #define PM_SUSPEND_MAX ((__force suspend_state_t) 4) | |
28 | ||
29 | /** | |
30 | * struct pm_ops - Callbacks for managing platform dependent system sleep | |
31 | * states. | |
32 | * | |
33 | * @valid: Callback to determine if given system sleep state is supported by | |
34 | * the platform. | |
35 | * Valid (ie. supported) states are advertised in /sys/power/state. Note | |
36 | * that it still may be impossible to enter given system sleep state if the | |
37 | * conditions aren't right. | |
38 | * There is the %pm_valid_only_mem function available that can be assigned | |
39 | * to this if the platform only supports mem sleep. | |
40 | * | |
41 | * @set_target: Tell the platform which system sleep state is going to be | |
42 | * entered. | |
43 | * @set_target() is executed right prior to suspending devices. The | |
44 | * information conveyed to the platform code by @set_target() should be | |
45 | * disregarded by the platform as soon as @finish() is executed and if | |
46 | * @prepare() fails. If @set_target() fails (ie. returns nonzero), | |
47 | * @prepare(), @enter() and @finish() will not be called by the PM core. | |
48 | * This callback is optional. However, if it is implemented, the argument | |
49 | * passed to @prepare(), @enter() and @finish() is meaningless and should | |
50 | * be ignored. | |
51 | * | |
52 | * @prepare: Prepare the platform for entering the system sleep state indicated | |
53 | * by @set_target() or represented by the argument if @set_target() is not | |
54 | * implemented. | |
55 | * @prepare() is called right after devices have been suspended (ie. the | |
56 | * appropriate .suspend() method has been executed for each device) and | |
57 | * before the nonboot CPUs are disabled (it is executed with IRQs enabled). | |
58 | * This callback is optional. It returns 0 on success or a negative | |
59 | * error code otherwise, in which case the system cannot enter the desired | |
60 | * sleep state (@enter() and @finish() will not be called in that case). | |
61 | * | |
62 | * @enter: Enter the system sleep state indicated by @set_target() or | |
63 | * represented by the argument if @set_target() is not implemented. | |
64 | * This callback is mandatory. It returns 0 on success or a negative | |
65 | * error code otherwise, in which case the system cannot enter the desired | |
66 | * sleep state. | |
67 | * | |
68 | * @finish: Called when the system has just left a sleep state, right after | |
69 | * the nonboot CPUs have been enabled and before devices are resumed (it is | |
70 | * executed with IRQs enabled). If @set_target() is not implemented, the | |
71 | * argument represents the sleep state being left. | |
72 | * This callback is optional, but should be implemented by the platforms | |
73 | * that implement @prepare(). If implemented, it is always called after | |
74 | * @enter() (even if @enter() fails). | |
75 | */ | |
76 | struct pm_ops { | |
77 | int (*valid)(suspend_state_t state); | |
78 | int (*set_target)(suspend_state_t state); | |
79 | int (*prepare)(suspend_state_t state); | |
80 | int (*enter)(suspend_state_t state); | |
81 | int (*finish)(suspend_state_t state); | |
82 | }; | |
83 | ||
84 | #ifdef CONFIG_SUSPEND | |
85 | extern struct pm_ops *pm_ops; | |
86 | ||
87 | /** | |
88 | * pm_set_ops - set platform dependent power management ops | |
89 | * @pm_ops: The new power management operations to set. | |
90 | */ | |
91 | extern void pm_set_ops(struct pm_ops *pm_ops); | |
92 | extern int pm_valid_only_mem(suspend_state_t state); | |
93 | ||
94 | /** | |
95 | * arch_suspend_disable_irqs - disable IRQs for suspend | |
96 | * | |
97 | * Disables IRQs (in the default case). This is a weak symbol in the common | |
98 | * code and thus allows architectures to override it if more needs to be | |
99 | * done. Not called for suspend to disk. | |
100 | */ | |
101 | extern void arch_suspend_disable_irqs(void); | |
102 | ||
103 | /** | |
104 | * arch_suspend_enable_irqs - enable IRQs after suspend | |
105 | * | |
106 | * Enables IRQs (in the default case). This is a weak symbol in the common | |
107 | * code and thus allows architectures to override it if more needs to be | |
108 | * done. Not called for suspend to disk. | |
109 | */ | |
110 | extern void arch_suspend_enable_irqs(void); | |
111 | ||
112 | extern int pm_suspend(suspend_state_t state); | |
113 | #else /* !CONFIG_SUSPEND */ | |
114 | #define suspend_valid_only_mem NULL | |
115 | ||
116 | static inline void pm_set_ops(struct pm_ops *pm_ops) {} | |
117 | static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } | |
118 | #endif /* !CONFIG_SUSPEND */ | |
1da177e4 | 119 | |
8357376d RW |
120 | /* struct pbe is used for creating lists of pages that should be restored |
121 | * atomically during the resume from disk, because the page frames they have | |
122 | * occupied before the suspend are in use. | |
123 | */ | |
dcbb5a54 | 124 | struct pbe { |
8357376d RW |
125 | void *address; /* address of the copy */ |
126 | void *orig_address; /* original address of a page */ | |
7088a5c0 | 127 | struct pbe *next; |
dcbb5a54 | 128 | }; |
1da177e4 | 129 | |
1da177e4 LT |
130 | /* mm/page_alloc.c */ |
131 | extern void drain_local_pages(void); | |
132 | extern void mark_free_pages(struct zone *zone); | |
133 | ||
a3d25c27 RW |
134 | /** |
135 | * struct hibernation_ops - hibernation platform support | |
136 | * | |
137 | * The methods in this structure allow a platform to override the default | |
138 | * mechanism of shutting down the machine during a hibernation transition. | |
139 | * | |
140 | * All three methods must be assigned. | |
141 | * | |
142 | * @prepare: prepare system for hibernation | |
143 | * @enter: shut down system after state has been saved to disk | |
144 | * @finish: finish/clean up after state has been reloaded | |
a634cc10 RW |
145 | * @pre_restore: prepare system for the restoration from a hibernation image |
146 | * @restore_cleanup: clean up after a failing image restoration | |
a3d25c27 RW |
147 | */ |
148 | struct hibernation_ops { | |
149 | int (*prepare)(void); | |
150 | int (*enter)(void); | |
151 | void (*finish)(void); | |
a634cc10 RW |
152 | int (*pre_restore)(void); |
153 | void (*restore_cleanup)(void); | |
a3d25c27 RW |
154 | }; |
155 | ||
b0cb1a19 | 156 | #ifdef CONFIG_HIBERNATION |
74dfd666 | 157 | /* kernel/power/snapshot.c */ |
940d67f6 JB |
158 | extern void __register_nosave_region(unsigned long b, unsigned long e, int km); |
159 | static inline void register_nosave_region(unsigned long b, unsigned long e) | |
160 | { | |
161 | __register_nosave_region(b, e, 0); | |
162 | } | |
163 | static inline void register_nosave_region_late(unsigned long b, unsigned long e) | |
164 | { | |
165 | __register_nosave_region(b, e, 1); | |
166 | } | |
74dfd666 RW |
167 | extern int swsusp_page_is_forbidden(struct page *); |
168 | extern void swsusp_set_page_free(struct page *); | |
169 | extern void swsusp_unset_page_free(struct page *); | |
170 | extern unsigned long get_safe_page(gfp_t gfp_mask); | |
a3d25c27 RW |
171 | |
172 | extern void hibernation_set_ops(struct hibernation_ops *ops); | |
173 | extern int hibernate(void); | |
b0cb1a19 | 174 | #else /* CONFIG_HIBERNATION */ |
74dfd666 RW |
175 | static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } |
176 | static inline void swsusp_set_page_free(struct page *p) {} | |
177 | static inline void swsusp_unset_page_free(struct page *p) {} | |
a3d25c27 RW |
178 | |
179 | static inline void hibernation_set_ops(struct hibernation_ops *ops) {} | |
180 | static inline int hibernate(void) { return -ENOSYS; } | |
b0cb1a19 | 181 | #endif /* CONFIG_HIBERNATION */ |
1da177e4 | 182 | |
296699de | 183 | #ifdef CONFIG_PM_SLEEP |
1da177e4 LT |
184 | void save_processor_state(void); |
185 | void restore_processor_state(void); | |
186 | struct saved_context; | |
187 | void __save_processor_state(struct saved_context *ctxt); | |
188 | void __restore_processor_state(struct saved_context *ctxt); | |
25761b6e | 189 | |
b10d9117 RW |
190 | /* kernel/power/main.c */ |
191 | extern struct blocking_notifier_head pm_chain_head; | |
192 | ||
193 | static inline int register_pm_notifier(struct notifier_block *nb) | |
194 | { | |
195 | return blocking_notifier_chain_register(&pm_chain_head, nb); | |
196 | } | |
197 | ||
198 | static inline int unregister_pm_notifier(struct notifier_block *nb) | |
199 | { | |
200 | return blocking_notifier_chain_unregister(&pm_chain_head, nb); | |
201 | } | |
202 | ||
203 | #define pm_notifier(fn, pri) { \ | |
204 | static struct notifier_block fn##_nb = \ | |
205 | { .notifier_call = fn, .priority = pri }; \ | |
206 | register_pm_notifier(&fn##_nb); \ | |
207 | } | |
296699de | 208 | #else /* !CONFIG_PM_SLEEP */ |
b10d9117 RW |
209 | |
210 | static inline int register_pm_notifier(struct notifier_block *nb) | |
211 | { | |
212 | return 0; | |
213 | } | |
214 | ||
215 | static inline int unregister_pm_notifier(struct notifier_block *nb) | |
216 | { | |
217 | return 0; | |
218 | } | |
219 | ||
220 | #define pm_notifier(fn, pri) do { (void)(fn); } while (0) | |
296699de | 221 | #endif /* !CONFIG_PM_SLEEP */ |
b10d9117 | 222 | |
296699de | 223 | #ifndef CONFIG_HIBERNATION |
b10d9117 RW |
224 | static inline void register_nosave_region(unsigned long b, unsigned long e) |
225 | { | |
226 | } | |
70f38db6 RK |
227 | static inline void register_nosave_region_late(unsigned long b, unsigned long e) |
228 | { | |
229 | } | |
b10d9117 RW |
230 | #endif |
231 | ||
95d9ffbe | 232 | #endif /* _LINUX_SUSPEND_H */ |