Initial import

1 files changed, 267 insertions, 0 deletions

diff --git a/include/linux/timer.h b/include/linux/timer.h
new file mode 100644
index 000000000..8c5a197e1
--- /dev/null
+++ b/include/linux/timer.h
@@ -0,0 +1,267 @@
+#ifndef _LINUX_TIMER_H
+#define _LINUX_TIMER_H
+
+#include <linux/list.h>
+#include <linux/ktime.h>
+#include <linux/stddef.h>
+#include <linux/debugobjects.h>
+#include <linux/stringify.h>
+
+struct tvec_base;
+
+struct timer_list {
+	/*
+	 * All fields that change during normal runtime grouped to the
+	 * same cacheline
+	 */
+	struct list_head entry;
+	unsigned long expires;
+	struct tvec_base *base;
+
+	void (*function)(unsigned long);
+	unsigned long data;
+
+	int slack;
+
+#ifdef CONFIG_TIMER_STATS
+	int start_pid;
+	void *start_site;
+	char start_comm[16];
+#endif
+#ifdef CONFIG_LOCKDEP
+	struct lockdep_map lockdep_map;
+#endif
+};
+
+extern struct tvec_base boot_tvec_bases;
+
+#ifdef CONFIG_LOCKDEP
+/*
+ * NB: because we have to copy the lockdep_map, setting the lockdep_map key
+ * (second argument) here is required, otherwise it could be initialised to
+ * the copy of the lockdep_map later! We use the pointer to and the string
+ * "<file>:<line>" as the key resp. the name of the lockdep_map.
+ */
+#define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn)				\
+	.lockdep_map = STATIC_LOCKDEP_MAP_INIT(_kn, &_kn),
+#else
+#define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn)
+#endif
+
+/*
+ * Note that all tvec_bases are at least 4 byte aligned and lower two bits
+ * of base in timer_list is guaranteed to be zero. Use them for flags.
+ *
+ * A deferrable timer will work normally when the system is busy, but
+ * will not cause a CPU to come out of idle just to service it; instead,
+ * the timer will be serviced when the CPU eventually wakes up with a
+ * subsequent non-deferrable timer.
+ *
+ * An irqsafe timer is executed with IRQ disabled and it's safe to wait for
+ * the completion of the running instance from IRQ handlers, for example,
+ * by calling del_timer_sync().
+ *
+ * Note: The irq disabled callback execution is a special case for
+ * workqueue locking issues. It's not meant for executing random crap
+ * with interrupts disabled. Abuse is monitored!
+ */
+#define TIMER_DEFERRABLE		0x1LU
+#define TIMER_IRQSAFE			0x2LU
+
+#define TIMER_FLAG_MASK			0x3LU
+
+#define __TIMER_INITIALIZER(_function, _expires, _data, _flags) { \
+		.entry = { .prev = TIMER_ENTRY_STATIC },	\
+		.function = (_function),			\
+		.expires = (_expires),				\
+		.data = (_data),				\
+		.base = (void *)((unsigned long)&boot_tvec_bases + (_flags)), \
+		.slack = -1,					\
+		__TIMER_LOCKDEP_MAP_INITIALIZER(		\
+			__FILE__ ":" __stringify(__LINE__))	\
+	}
+
+#define TIMER_INITIALIZER(_function, _expires, _data)		\
+	__TIMER_INITIALIZER((_function), (_expires), (_data), 0)
+
+#define TIMER_DEFERRED_INITIALIZER(_function, _expires, _data)	\
+	__TIMER_INITIALIZER((_function), (_expires), (_data), TIMER_DEFERRABLE)
+
+#define DEFINE_TIMER(_name, _function, _expires, _data)		\
+	struct timer_list _name =				\
+		TIMER_INITIALIZER(_function, _expires, _data)
+
+void init_timer_key(struct timer_list *timer, unsigned int flags,
+		    const char *name, struct lock_class_key *key);
+
+#ifdef CONFIG_DEBUG_OBJECTS_TIMERS
+extern void init_timer_on_stack_key(struct timer_list *timer,
+				    unsigned int flags, const char *name,
+				    struct lock_class_key *key);
+extern void destroy_timer_on_stack(struct timer_list *timer);
+#else
+static inline void destroy_timer_on_stack(struct timer_list *timer) { }
+static inline void init_timer_on_stack_key(struct timer_list *timer,
+					   unsigned int flags, const char *name,
+					   struct lock_class_key *key)
+{
+	init_timer_key(timer, flags, name, key);
+}
+#endif
+
+#ifdef CONFIG_LOCKDEP
+#define __init_timer(_timer, _flags)					\
+	do {								\
+		static struct lock_class_key __key;			\
+		init_timer_key((_timer), (_flags), #_timer, &__key);	\
+	} while (0)
+
+#define __init_timer_on_stack(_timer, _flags)				\
+	do {								\
+		static struct lock_class_key __key;			\
+		init_timer_on_stack_key((_timer), (_flags), #_timer, &__key); \
+	} while (0)
+#else
+#define __init_timer(_timer, _flags)					\
+	init_timer_key((_timer), (_flags), NULL, NULL)
+#define __init_timer_on_stack(_timer, _flags)				\
+	init_timer_on_stack_key((_timer), (_flags), NULL, NULL)
+#endif
+
+#define init_timer(timer)						\
+	__init_timer((timer), 0)
+#define init_timer_deferrable(timer)					\
+	__init_timer((timer), TIMER_DEFERRABLE)
+#define init_timer_on_stack(timer)					\
+	__init_timer_on_stack((timer), 0)
+
+#define __setup_timer(_timer, _fn, _data, _flags)			\
+	do {								\
+		__init_timer((_timer), (_flags));			\
+		(_timer)->function = (_fn);				\
+		(_timer)->data = (_data);				\
+	} while (0)
+
+#define __setup_timer_on_stack(_timer, _fn, _data, _flags)		\
+	do {								\
+		__init_timer_on_stack((_timer), (_flags));		\
+		(_timer)->function = (_fn);				\
+		(_timer)->data = (_data);				\
+	} while (0)
+
+#define setup_timer(timer, fn, data)					\
+	__setup_timer((timer), (fn), (data), 0)
+#define setup_timer_on_stack(timer, fn, data)				\
+	__setup_timer_on_stack((timer), (fn), (data), 0)
+#define setup_deferrable_timer_on_stack(timer, fn, data)		\
+	__setup_timer_on_stack((timer), (fn), (data), TIMER_DEFERRABLE)
+
+/**
+ * timer_pending - is a timer pending?
+ * @timer: the timer in question
+ *
+ * timer_pending will tell whether a given timer is currently pending,
+ * or not. Callers must ensure serialization wrt. other operations done
+ * to this timer, eg. interrupt contexts, or other CPUs on SMP.
+ *
+ * return value: 1 if the timer is pending, 0 if not.
+ */
+static inline int timer_pending(const struct timer_list * timer)
+{
+	return timer->entry.next != NULL;
+}
+
+extern void add_timer_on(struct timer_list *timer, int cpu);
+extern int del_timer(struct timer_list * timer);
+extern int mod_timer(struct timer_list *timer, unsigned long expires);
+extern int mod_timer_pending(struct timer_list *timer, unsigned long expires);
+extern int mod_timer_pinned(struct timer_list *timer, unsigned long expires);
+
+extern void set_timer_slack(struct timer_list *time, int slack_hz);
+
+#define TIMER_NOT_PINNED	0
+#define TIMER_PINNED		1
+/*
+ * The jiffies value which is added to now, when there is no timer
+ * in the timer wheel:
+ */
+#define NEXT_TIMER_MAX_DELTA	((1UL << 30) - 1)
+
+/*
+ * Return when the next timer-wheel timeout occurs (in absolute jiffies),
+ * locks the timer base and does the comparison against the given
+ * jiffie.
+ */
+extern unsigned long get_next_timer_interrupt(unsigned long now);
+
+/*
+ * Timer-statistics info:
+ */
+#ifdef CONFIG_TIMER_STATS
+
+extern int timer_stats_active;
+
+#define TIMER_STATS_FLAG_DEFERRABLE	0x1
+
+extern void init_timer_stats(void);
+
+extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
+				     void *timerf, char *comm,
+				     unsigned int timer_flag);
+
+extern void __timer_stats_timer_set_start_info(struct timer_list *timer,
+					       void *addr);
+
+static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
+{
+	if (likely(!timer_stats_active))
+		return;
+	__timer_stats_timer_set_start_info(timer, __builtin_return_address(0));
+}
+
+static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
+{
+	timer->start_site = NULL;
+}
+#else
+static inline void init_timer_stats(void)
+{
+}
+
+static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
+{
+}
+
+static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
+{
+}
+#endif
+
+extern void add_timer(struct timer_list *timer);
+
+extern int try_to_del_timer_sync(struct timer_list *timer);
+
+#ifdef CONFIG_SMP
+  extern int del_timer_sync(struct timer_list *timer);
+#else
+# define del_timer_sync(t)		del_timer(t)
+#endif
+
+#define del_singleshot_timer_sync(t) del_timer_sync(t)
+
+extern void init_timers(void);
+extern void run_local_timers(void);
+struct hrtimer;
+extern enum hrtimer_restart it_real_fn(struct hrtimer *);
+
+unsigned long __round_jiffies(unsigned long j, int cpu);
+unsigned long __round_jiffies_relative(unsigned long j, int cpu);
+unsigned long round_jiffies(unsigned long j);
+unsigned long round_jiffies_relative(unsigned long j);
+
+unsigned long __round_jiffies_up(unsigned long j, int cpu);
+unsigned long __round_jiffies_up_relative(unsigned long j, int cpu);
+unsigned long round_jiffies_up(unsigned long j);
+unsigned long round_jiffies_up_relative(unsigned long j);
+
+#endif