#ifndef _LINUX_SUSPEND_H
#define _LINUX_SUSPEND_H
-#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64)
-#include <asm/suspend.h>
-#endif
#include <linux/swap.h>
#include <linux/notifier.h>
#include <linux/init.h>
* by @begin().
* @prepare() is called right after devices have been suspended (ie. the
* appropriate .suspend() method has been executed for each device) and
- * before the nonboot CPUs are disabled (it is executed with IRQs enabled).
- * This callback is optional. It returns 0 on success or a negative
- * error code otherwise, in which case the system cannot enter the desired
- * sleep state (@enter() and @finish() will not be called in that case).
+ * before device drivers' late suspend callbacks are executed. It returns
+ * 0 on success or a negative error code otherwise, in which case the
+ * system cannot enter the desired sleep state (@prepare_late(), @enter(),
+ * @wake(), and @finish() will not be called in that case).
+ *
+ * @prepare_late: Finish preparing the platform for entering the system sleep
+ * state indicated by @begin().
+ * @prepare_late is called before disabling nonboot CPUs and after
+ * device drivers' late suspend callbacks have been executed. It returns
+ * 0 on success or a negative error code otherwise, in which case the
+ * system cannot enter the desired sleep state (@enter() and @wake()).
*
* @enter: Enter the system sleep state indicated by @begin() or represented by
* the argument if @begin() is not implemented.
* error code otherwise, in which case the system cannot enter the desired
* sleep state.
*
- * @finish: Called when the system has just left a sleep state, right after
- * the nonboot CPUs have been enabled and before devices are resumed (it is
- * executed with IRQs enabled).
+ * @wake: Called when the system has just left a sleep state, right after
+ * the nonboot CPUs have been enabled and before device drivers' early
+ * resume callbacks are executed.
+ * This callback is optional, but should be implemented by the platforms
+ * that implement @prepare_late(). If implemented, it is always called
+ * after @enter(), even if @enter() fails.
+ *
+ * @finish: Finish wake-up of the platform.
+ * @finish is called right prior to calling device drivers' regular suspend
+ * callbacks.
* This callback is optional, but should be implemented by the platforms
* that implement @prepare(). If implemented, it is always called after
- * @enter() (even if @enter() fails).
+ * @enter() and @wake(), if implemented, even if any of them fails.
*
* @end: Called by the PM core right after resuming devices, to indicate to
* the platform that the system has returned to the working state or
* the transition to the sleep state has been aborted.
* This callback is optional, but should be implemented by the platforms
- * that implement @begin(), but platforms implementing @begin() should
- * also provide a @end() which cleans up transitions aborted before
+ * that implement @begin(). Accordingly, platforms implementing @begin()
+ * should also provide a @end() which cleans up transitions aborted before
* @enter().
*
* @recover: Recover the platform from a suspend failure.
int (*valid)(suspend_state_t state);
int (*begin)(suspend_state_t state);
int (*prepare)(void);
+ int (*prepare_late)(void);
int (*enter)(suspend_state_t state);
+ void (*wake)(void);
void (*finish)(void);
void (*end)(void);
void (*recover)(void);
#ifdef CONFIG_HIBERNATION
/* kernel/power/snapshot.c */
extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
-static inline void register_nosave_region(unsigned long b, unsigned long e)
+static inline void __init register_nosave_region(unsigned long b, unsigned long e)
{
__register_nosave_region(b, e, 0);
}
-static inline void register_nosave_region_late(unsigned long b, unsigned long e)
+static inline void __init register_nosave_region_late(unsigned long b, unsigned long e)
{
__register_nosave_region(b, e, 1);
}
extern void hibernation_set_ops(struct platform_hibernation_ops *ops);
extern int hibernate(void);
+extern bool system_entering_hibernation(void);
#else /* CONFIG_HIBERNATION */
static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
static inline void swsusp_set_page_free(struct page *p) {}
static inline void hibernation_set_ops(struct platform_hibernation_ops *ops) {}
static inline int hibernate(void) { return -ENOSYS; }
+static inline bool system_entering_hibernation(void) { return false; }
#endif /* CONFIG_HIBERNATION */
+#ifdef CONFIG_HIBERNATION_NVS
+extern int hibernate_nvs_register(unsigned long start, unsigned long size);
+extern int hibernate_nvs_alloc(void);
+extern void hibernate_nvs_free(void);
+extern void hibernate_nvs_save(void);
+extern void hibernate_nvs_restore(void);
+#else /* CONFIG_HIBERNATION_NVS */
+static inline int hibernate_nvs_register(unsigned long a, unsigned long b)
+{
+ return 0;
+}
+static inline int hibernate_nvs_alloc(void) { return 0; }
+static inline void hibernate_nvs_free(void) {}
+static inline void hibernate_nvs_save(void) {}
+static inline void hibernate_nvs_restore(void) {}
+#endif /* CONFIG_HIBERNATION_NVS */
+
#ifdef CONFIG_PM_SLEEP
void save_processor_state(void);
void restore_processor_state(void);
#define pm_notifier(fn, pri) do { (void)(fn); } while (0)
#endif /* !CONFIG_PM_SLEEP */
+extern struct mutex pm_mutex;
+
#ifndef CONFIG_HIBERNATION
static inline void register_nosave_region(unsigned long b, unsigned long e)
{
static inline void register_nosave_region_late(unsigned long b, unsigned long e)
{
}
-#endif
-extern struct mutex pm_mutex;
+static inline void lock_system_sleep(void) {}
+static inline void unlock_system_sleep(void) {}
+
+#else
+
+/* Let some subsystems like memory hotadd exclude hibernation */
+
+static inline void lock_system_sleep(void)
+{
+ mutex_lock(&pm_mutex);
+}
+
+static inline void unlock_system_sleep(void)
+{
+ mutex_unlock(&pm_mutex);
+}
+#endif
#endif /* _LINUX_SUSPEND_H */
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