[deliverable/linux.git] / kernel / irq / internals.h

/*
 * IRQ subsystem internal functions and variables:
 *
 * Do not ever include this file from anything else than
 * kernel/irq/. Do not even think about using any information outside
 * of this file for your non core code.
 */
#include <linux/irqdesc.h>
#include <linux/kernel_stat.h>

#ifdef CONFIG_SPARSE_IRQ
# define IRQ_BITMAP_BITS	(NR_IRQS + 8196)
#else
# define IRQ_BITMAP_BITS	NR_IRQS
#endif

#define istate core_internal_state__do_not_mess_with_it

extern bool noirqdebug;

/*
 * Bits used by threaded handlers:
 * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
 * IRQTF_WARNED    - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
 * IRQTF_AFFINITY  - irq thread is requested to adjust affinity
 * IRQTF_FORCED_THREAD  - irq action is force threaded
 */
enum {
	IRQTF_RUNTHREAD,
	IRQTF_WARNED,
	IRQTF_AFFINITY,
	IRQTF_FORCED_THREAD,
};

/*
 * Bit masks for desc->core_internal_state__do_not_mess_with_it
 *
 * IRQS_AUTODETECT		- autodetection in progress
 * IRQS_SPURIOUS_DISABLED	- was disabled due to spurious interrupt
 *				  detection
 * IRQS_POLL_INPROGRESS		- polling in progress
 * IRQS_ONESHOT			- irq is not unmasked in primary handler
 * IRQS_REPLAY			- irq is replayed
 * IRQS_WAITING			- irq is waiting
 * IRQS_PENDING			- irq is pending and replayed later
 * IRQS_SUSPENDED		- irq is suspended
 */
enum {
	IRQS_AUTODETECT		= 0x00000001,
	IRQS_SPURIOUS_DISABLED	= 0x00000002,
	IRQS_POLL_INPROGRESS	= 0x00000008,
	IRQS_ONESHOT		= 0x00000020,
	IRQS_REPLAY		= 0x00000040,
	IRQS_WAITING		= 0x00000080,
	IRQS_PENDING		= 0x00000200,
	IRQS_SUSPENDED		= 0x00000800,
};

#include "debug.h"
#include "settings.h"

#define irq_data_to_desc(data)	container_of(data, struct irq_desc, irq_data)

extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
		unsigned long flags);
extern void __disable_irq(struct irq_desc *desc, unsigned int irq);
extern void __enable_irq(struct irq_desc *desc, unsigned int irq);

extern int irq_startup(struct irq_desc *desc, bool resend);
extern void irq_shutdown(struct irq_desc *desc);
extern void irq_enable(struct irq_desc *desc);
extern void irq_disable(struct irq_desc *desc);
extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
extern void mask_irq(struct irq_desc *desc);
extern void unmask_irq(struct irq_desc *desc);
extern void unmask_threaded_irq(struct irq_desc *desc);

#ifdef CONFIG_SPARSE_IRQ
static inline void irq_mark_irq(unsigned int irq) { }
#else
extern void irq_mark_irq(unsigned int irq);
#endif

extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);

irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
irqreturn_t handle_irq_event(struct irq_desc *desc);

/* Resending of interrupts :*/
void check_irq_resend(struct irq_desc *desc, unsigned int irq);
bool irq_wait_for_poll(struct irq_desc *desc);
void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action);

#ifdef CONFIG_PROC_FS
extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
extern void register_handler_proc(unsigned int irq, struct irqaction *action);
extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
#else
static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
static inline void register_handler_proc(unsigned int irq,
					 struct irqaction *action) { }
static inline void unregister_handler_proc(unsigned int irq,
					   struct irqaction *action) { }
#endif

extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);

extern void irq_set_thread_affinity(struct irq_desc *desc);

extern int irq_do_set_affinity(struct irq_data *data,
			       const struct cpumask *dest, bool force);

/* Inline functions for support of irq chips on slow busses */
static inline void chip_bus_lock(struct irq_desc *desc)
{
	if (unlikely(desc->irq_data.chip->irq_bus_lock))
		desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
}

static inline void chip_bus_sync_unlock(struct irq_desc *desc)
{
	if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
		desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
}

#define _IRQ_DESC_CHECK		(1 << 0)
#define _IRQ_DESC_PERCPU	(1 << 1)

#define IRQ_GET_DESC_CHECK_GLOBAL	(_IRQ_DESC_CHECK)
#define IRQ_GET_DESC_CHECK_PERCPU	(_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)

struct irq_desc *
__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
		    unsigned int check);
void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);

static inline struct irq_desc *
irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
{
	return __irq_get_desc_lock(irq, flags, true, check);
}

static inline void
irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
{
	__irq_put_desc_unlock(desc, flags, true);
}

static inline struct irq_desc *
irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
{
	return __irq_get_desc_lock(irq, flags, false, check);
}

static inline void
irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
{
	__irq_put_desc_unlock(desc, flags, false);
}

/*
 * Manipulation functions for irq_data.state
 */
static inline void irqd_set_move_pending(struct irq_data *d)
{
	d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
}

static inline void irqd_clr_move_pending(struct irq_data *d)
{
	d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
}

static inline void irqd_clear(struct irq_data *d, unsigned int mask)
{
	d->state_use_accessors &= ~mask;
}

static inline void irqd_set(struct irq_data *d, unsigned int mask)
{
	d->state_use_accessors |= mask;
}

static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
{
	return d->state_use_accessors & mask;
}

static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc)
{
	__this_cpu_inc(*desc->kstat_irqs);
	__this_cpu_inc(kstat.irqs_sum);
}

#ifdef CONFIG_PM_SLEEP
bool irq_pm_check_wakeup(struct irq_desc *desc);
void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);
void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action);
#else
static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; }
static inline void
irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { }
static inline void
irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { }
#endif
Commit	Line	Data
	1	/*
	2	* IRQ subsystem internal functions and variables:
	3	*
	4	* Do not ever include this file from anything else than
	5	* kernel/irq/. Do not even think about using any information outside
	6	* of this file for your non core code.
	7	*/
	8	#include <linux/irqdesc.h>
	9	#include <linux/kernel_stat.h>
	10
	11	#ifdef CONFIG_SPARSE_IRQ
	12	# define IRQ_BITMAP_BITS (NR_IRQS + 8196)
	13	#else
	14	# define IRQ_BITMAP_BITS NR_IRQS
	15	#endif
	16
	17	#define istate core_internal_state__do_not_mess_with_it
	18
	19	extern bool noirqdebug;
	20
	21	/*
	22	* Bits used by threaded handlers:
	23	* IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
	24	* IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
	25	* IRQTF_AFFINITY - irq thread is requested to adjust affinity
	26	* IRQTF_FORCED_THREAD - irq action is force threaded
	27	*/
	28	enum {
	29	IRQTF_RUNTHREAD,
	30	IRQTF_WARNED,
	31	IRQTF_AFFINITY,
	32	IRQTF_FORCED_THREAD,
	33	};
	34
	35	/*
	36	* Bit masks for desc->core_internal_state__do_not_mess_with_it
	37	*
	38	* IRQS_AUTODETECT - autodetection in progress
	39	* IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
	40	* detection
	41	* IRQS_POLL_INPROGRESS - polling in progress
	42	* IRQS_ONESHOT - irq is not unmasked in primary handler
	43	* IRQS_REPLAY - irq is replayed
	44	* IRQS_WAITING - irq is waiting
	45	* IRQS_PENDING - irq is pending and replayed later
	46	* IRQS_SUSPENDED - irq is suspended
	47	*/
	48	enum {
	49	IRQS_AUTODETECT = 0x00000001,
	50	IRQS_SPURIOUS_DISABLED = 0x00000002,
	51	IRQS_POLL_INPROGRESS = 0x00000008,
	52	IRQS_ONESHOT = 0x00000020,
	53	IRQS_REPLAY = 0x00000040,
	54	IRQS_WAITING = 0x00000080,
	55	IRQS_PENDING = 0x00000200,
	56	IRQS_SUSPENDED = 0x00000800,
	57	};
	58
	59	#include "debug.h"
	60	#include "settings.h"
	61
	62	#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
	63
	64	extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
	65	unsigned long flags);
	66	extern void __disable_irq(struct irq_desc *desc, unsigned int irq);
	67	extern void __enable_irq(struct irq_desc *desc, unsigned int irq);
	68
	69	extern int irq_startup(struct irq_desc *desc, bool resend);
	70	extern void irq_shutdown(struct irq_desc *desc);
	71	extern void irq_enable(struct irq_desc *desc);
	72	extern void irq_disable(struct irq_desc *desc);
	73	extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
	74	extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
	75	extern void mask_irq(struct irq_desc *desc);
	76	extern void unmask_irq(struct irq_desc *desc);
	77	extern void unmask_threaded_irq(struct irq_desc *desc);
	78
	79	#ifdef CONFIG_SPARSE_IRQ
	80	static inline void irq_mark_irq(unsigned int irq) { }
	81	#else
	82	extern void irq_mark_irq(unsigned int irq);
	83	#endif
	84
	85	extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
	86
	87	irqreturn_t handle_irq_event_percpu(struct irq_desc desc, struct irqaction action);
	88	irqreturn_t handle_irq_event(struct irq_desc *desc);
	89
	90	/* Resending of interrupts :*/
	91	void check_irq_resend(struct irq_desc *desc, unsigned int irq);
	92	bool irq_wait_for_poll(struct irq_desc *desc);
	93	void __irq_wake_thread(struct irq_desc desc, struct irqaction action);
	94
	95	#ifdef CONFIG_PROC_FS
	96	extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
	97	extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
	98	extern void register_handler_proc(unsigned int irq, struct irqaction *action);
	99	extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
	100	#else
	101	static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
	102	static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
	103	static inline void register_handler_proc(unsigned int irq,
	104	struct irqaction *action) { }
	105	static inline void unregister_handler_proc(unsigned int irq,
	106	struct irqaction *action) { }
	107	#endif
	108
	109	extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
	110
	111	extern void irq_set_thread_affinity(struct irq_desc *desc);
	112
	113	extern int irq_do_set_affinity(struct irq_data *data,
	114	const struct cpumask *dest, bool force);
	115
	116	/* Inline functions for support of irq chips on slow busses */
	117	static inline void chip_bus_lock(struct irq_desc *desc)
	118	{
	119	if (unlikely(desc->irq_data.chip->irq_bus_lock))
	120	desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
	121	}
	122
	123	static inline void chip_bus_sync_unlock(struct irq_desc *desc)
	124	{
	125	if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
	126	desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
	127	}
	128
	129	#define _IRQ_DESC_CHECK (1 << 0)
	130	#define _IRQ_DESC_PERCPU (1 << 1)
	131
	132	#define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
	133	#define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK \| _IRQ_DESC_PERCPU)
	134
	135	struct irq_desc *
	136	__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
	137	unsigned int check);
	138	void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
	139
	140	static inline struct irq_desc *
	141	irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
	142	{
	143	return __irq_get_desc_lock(irq, flags, true, check);
	144	}
	145
	146	static inline void
	147	irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
	148	{
	149	__irq_put_desc_unlock(desc, flags, true);
	150	}
	151
	152	static inline struct irq_desc *
	153	irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
	154	{
	155	return __irq_get_desc_lock(irq, flags, false, check);
	156	}
	157
	158	static inline void
	159	irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
	160	{
	161	__irq_put_desc_unlock(desc, flags, false);
	162	}
	163
	164	/*
	165	* Manipulation functions for irq_data.state
	166	*/
	167	static inline void irqd_set_move_pending(struct irq_data *d)
	168	{
	169	d->state_use_accessors \|= IRQD_SETAFFINITY_PENDING;
	170	}
	171
	172	static inline void irqd_clr_move_pending(struct irq_data *d)
	173	{
	174	d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
	175	}
	176
	177	static inline void irqd_clear(struct irq_data *d, unsigned int mask)
	178	{
	179	d->state_use_accessors &= ~mask;
	180	}
	181
	182	static inline void irqd_set(struct irq_data *d, unsigned int mask)
	183	{
	184	d->state_use_accessors \|= mask;
	185	}
	186
	187	static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
	188	{
	189	return d->state_use_accessors & mask;
	190	}
	191
	192	static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc)
	193	{
	194	__this_cpu_inc(*desc->kstat_irqs);
	195	__this_cpu_inc(kstat.irqs_sum);
	196	}
	197
	198	#ifdef CONFIG_PM_SLEEP
	199	bool irq_pm_check_wakeup(struct irq_desc *desc);
	200	void irq_pm_install_action(struct irq_desc desc, struct irqaction action);
	201	void irq_pm_remove_action(struct irq_desc desc, struct irqaction action);
	202	#else
	203	static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; }
	204	static inline void
	205	irq_pm_install_action(struct irq_desc desc, struct irqaction action) { }
	206	static inline void
	207	irq_pm_remove_action(struct irq_desc desc, struct irqaction action) { }
	208	#endif