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Ingo Molnar06fcb0c2006-06-29 02:24:40 -07001#ifndef _LINUX_IRQ_H
2#define _LINUX_IRQ_H
Linus Torvalds1da177e2005-04-16 15:20:36 -07003
4/*
5 * Please do not include this file in generic code. There is currently
6 * no requirement for any architecture to implement anything held
7 * within this file.
8 *
9 * Thanks. --rmk
10 */
11
Adrian Bunk23f9b312005-12-21 02:27:50 +010012#include <linux/smp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
Ingo Molnar06fcb0c2006-06-29 02:24:40 -070014#ifndef CONFIG_S390
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
16#include <linux/linkage.h>
17#include <linux/cache.h>
18#include <linux/spinlock.h>
19#include <linux/cpumask.h>
Jan Beulich908dcec2006-06-23 02:06:00 -070020#include <linux/irqreturn.h>
Thomas Gleixnerdd3a1db2008-10-16 18:20:58 +020021#include <linux/irqnr.h>
David Howells77904fd2007-02-28 20:13:26 -080022#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
24#include <asm/irq.h>
25#include <asm/ptrace.h>
David Howells7d12e782006-10-05 14:55:46 +010026#include <asm/irq_regs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
David Howells57a58a92006-10-05 13:06:34 +010028struct irq_desc;
Harvey Harrisonec701582008-02-08 04:19:55 -080029typedef void (*irq_flow_handler_t)(unsigned int irq,
David Howells7d12e782006-10-05 14:55:46 +010030 struct irq_desc *desc);
David Howells57a58a92006-10-05 13:06:34 +010031
32
Linus Torvalds1da177e2005-04-16 15:20:36 -070033/*
34 * IRQ line status.
Thomas Gleixner6e213612006-07-01 19:29:03 -070035 *
Thomas Gleixner950f4422007-02-16 01:27:24 -080036 * Bits 0-7 are reserved for the IRQF_* bits in linux/interrupt.h
Thomas Gleixner6e213612006-07-01 19:29:03 -070037 *
38 * IRQ types
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 */
Thomas Gleixner6e213612006-07-01 19:29:03 -070040#define IRQ_TYPE_NONE 0x00000000 /* Default, unspecified type */
41#define IRQ_TYPE_EDGE_RISING 0x00000001 /* Edge rising type */
42#define IRQ_TYPE_EDGE_FALLING 0x00000002 /* Edge falling type */
43#define IRQ_TYPE_EDGE_BOTH (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)
44#define IRQ_TYPE_LEVEL_HIGH 0x00000004 /* Level high type */
45#define IRQ_TYPE_LEVEL_LOW 0x00000008 /* Level low type */
46#define IRQ_TYPE_SENSE_MASK 0x0000000f /* Mask of the above */
47#define IRQ_TYPE_PROBE 0x00000010 /* Probing in progress */
48
49/* Internal flags */
Thomas Gleixner950f4422007-02-16 01:27:24 -080050#define IRQ_INPROGRESS 0x00000100 /* IRQ handler active - do not enter! */
51#define IRQ_DISABLED 0x00000200 /* IRQ disabled - do not enter! */
52#define IRQ_PENDING 0x00000400 /* IRQ pending - replay on enable */
53#define IRQ_REPLAY 0x00000800 /* IRQ has been replayed but not acked yet */
54#define IRQ_AUTODETECT 0x00001000 /* IRQ is being autodetected */
55#define IRQ_WAITING 0x00002000 /* IRQ not yet seen - for autodetection */
56#define IRQ_LEVEL 0x00004000 /* IRQ level triggered */
57#define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */
58#define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */
59#define IRQ_NOPROBE 0x00020000 /* IRQ is not valid for probing */
60#define IRQ_NOREQUEST 0x00040000 /* IRQ cannot be requested */
61#define IRQ_NOAUTOEN 0x00080000 /* IRQ will not be enabled on request irq */
Ingo Molnard7e25f32007-02-16 01:28:24 -080062#define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */
63#define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */
64#define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */
Thomas Gleixner1adb0852008-04-28 17:01:56 +020065#define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */
Thomas Gleixnerf6d87f42008-11-07 13:18:30 +010066#define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */
67#define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/
Thomas Gleixner950f4422007-02-16 01:27:24 -080068
Ingo Molnar0d7012a2006-06-29 02:24:43 -070069#ifdef CONFIG_IRQ_PER_CPU
Karsten Wiesef26fdd52005-09-06 15:17:25 -070070# define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
Thomas Gleixner950f4422007-02-16 01:27:24 -080071# define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
Karsten Wiesef26fdd52005-09-06 15:17:25 -070072#else
73# define CHECK_IRQ_PER_CPU(var) 0
Thomas Gleixner950f4422007-02-16 01:27:24 -080074# define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING
Karsten Wiesef26fdd52005-09-06 15:17:25 -070075#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -070077struct proc_dir_entry;
Eric W. Biederman5b912c12007-01-28 12:52:03 -070078struct msi_desc;
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -070079
Ingo Molnar8fee5c32006-06-29 02:24:45 -070080/**
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -070081 * struct irq_chip - hardware interrupt chip descriptor
Ingo Molnar8fee5c32006-06-29 02:24:45 -070082 *
83 * @name: name for /proc/interrupts
84 * @startup: start up the interrupt (defaults to ->enable if NULL)
85 * @shutdown: shut down the interrupt (defaults to ->disable if NULL)
86 * @enable: enable the interrupt (defaults to chip->unmask if NULL)
87 * @disable: disable the interrupt (defaults to chip->mask if NULL)
Ingo Molnar8fee5c32006-06-29 02:24:45 -070088 * @ack: start of a new interrupt
89 * @mask: mask an interrupt source
90 * @mask_ack: ack and mask an interrupt source
91 * @unmask: unmask an interrupt source
Ingo Molnar47c2a3a2006-06-29 02:25:03 -070092 * @eoi: end of interrupt - chip level
93 * @end: end of interrupt - flow level
Ingo Molnar8fee5c32006-06-29 02:24:45 -070094 * @set_affinity: set the CPU affinity on SMP machines
95 * @retrigger: resend an IRQ to the CPU
96 * @set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
97 * @set_wake: enable/disable power-management wake-on of an IRQ
98 *
99 * @release: release function solely used by UML
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700100 * @typename: obsoleted by name, kept as migration helper
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 */
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700102struct irq_chip {
103 const char *name;
Ingo Molnar71d218b2006-06-29 02:24:41 -0700104 unsigned int (*startup)(unsigned int irq);
105 void (*shutdown)(unsigned int irq);
106 void (*enable)(unsigned int irq);
107 void (*disable)(unsigned int irq);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700108
Ingo Molnar71d218b2006-06-29 02:24:41 -0700109 void (*ack)(unsigned int irq);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700110 void (*mask)(unsigned int irq);
111 void (*mask_ack)(unsigned int irq);
112 void (*unmask)(unsigned int irq);
Ingo Molnar47c2a3a2006-06-29 02:25:03 -0700113 void (*eoi)(unsigned int irq);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700114
Ingo Molnar71d218b2006-06-29 02:24:41 -0700115 void (*end)(unsigned int irq);
116 void (*set_affinity)(unsigned int irq, cpumask_t dest);
Ingo Molnarc0ad90a2006-06-29 02:24:44 -0700117 int (*retrigger)(unsigned int irq);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700118 int (*set_type)(unsigned int irq, unsigned int flow_type);
119 int (*set_wake)(unsigned int irq, unsigned int on);
Ingo Molnarc0ad90a2006-06-29 02:24:44 -0700120
Paolo 'Blaisorblade' Giarrussob77d6ad2005-06-21 17:16:24 -0700121 /* Currently used only by UML, might disappear one day.*/
122#ifdef CONFIG_IRQ_RELEASE_METHOD
Ingo Molnar71d218b2006-06-29 02:24:41 -0700123 void (*release)(unsigned int irq, void *dev_id);
Paolo 'Blaisorblade' Giarrussob77d6ad2005-06-21 17:16:24 -0700124#endif
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700125 /*
126 * For compatibility, ->typename is copied into ->name.
127 * Will disappear.
128 */
129 const char *typename;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130};
131
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700132/**
133 * struct irq_desc - interrupt descriptor
Randy Dunlap2ed1cdc2008-11-21 16:59:57 -0800134 * @irq: interrupt number for this descriptor
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700135 * @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()]
136 * @chip: low level interrupt hardware access
Randy Dunlap472900b2007-02-16 01:28:25 -0800137 * @msi_desc: MSI descriptor
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700138 * @handler_data: per-IRQ data for the irq_chip methods
139 * @chip_data: platform-specific per-chip private data for the chip
140 * methods, to allow shared chip implementations
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700141 * @action: the irq action chain
142 * @status: status information
143 * @depth: disable-depth, for nested irq_disable() calls
David Brownell15a647e2006-07-30 03:03:08 -0700144 * @wake_depth: enable depth, for multiple set_irq_wake() callers
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700145 * @irq_count: stats field to detect stalled irqs
146 * @irqs_unhandled: stats field for spurious unhandled interrupts
Randy Dunlap5ac4d822007-07-31 00:39:03 -0700147 * @last_unhandled: aging timer for unhandled count
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700148 * @lock: locking for SMP
149 * @affinity: IRQ affinity on SMP
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700150 * @cpu: cpu index useful for balancing
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700151 * @pending_mask: pending rebalanced interrupts
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700152 * @dir: /proc/irq/ procfs entry
Ingo Molnara460e742006-10-17 00:10:03 -0700153 * @name: flow handler name for /proc/interrupts output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 */
Ingo Molnar34ffdb72006-06-29 02:24:40 -0700155struct irq_desc {
Yinghai Lu08678b02008-08-19 20:50:05 -0700156 unsigned int irq;
David Howells57a58a92006-10-05 13:06:34 +0100157 irq_flow_handler_t handle_irq;
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700158 struct irq_chip *chip;
Eric W. Biederman5b912c12007-01-28 12:52:03 -0700159 struct msi_desc *msi_desc;
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700160 void *handler_data;
Ingo Molnar71d218b2006-06-29 02:24:41 -0700161 void *chip_data;
162 struct irqaction *action; /* IRQ action list */
163 unsigned int status; /* IRQ status */
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700164
Ingo Molnar71d218b2006-06-29 02:24:41 -0700165 unsigned int depth; /* nested irq disables */
David Brownell15a647e2006-07-30 03:03:08 -0700166 unsigned int wake_depth; /* nested wake enables */
Ingo Molnar71d218b2006-06-29 02:24:41 -0700167 unsigned int irq_count; /* For detecting broken IRQs */
168 unsigned int irqs_unhandled;
Alan Cox4f27c002007-07-15 23:40:55 -0700169 unsigned long last_unhandled; /* Aging timer for unhandled count */
Ingo Molnar71d218b2006-06-29 02:24:41 -0700170 spinlock_t lock;
Ingo Molnara53da522006-06-29 02:24:38 -0700171#ifdef CONFIG_SMP
Ingo Molnar71d218b2006-06-29 02:24:41 -0700172 cpumask_t affinity;
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700173 unsigned int cpu;
Ingo Molnara53da522006-06-29 02:24:38 -0700174#endif
Yinghai Lu8b8e8c12008-08-19 20:50:23 -0700175#ifdef CONFIG_GENERIC_PENDING_IRQ
Ingo Molnarcd916d32006-06-29 02:24:42 -0700176 cpumask_t pending_mask;
Ashok Raj54d5d422005-09-06 15:16:15 -0700177#endif
Ingo Molnar4a733ee2006-06-29 02:24:42 -0700178#ifdef CONFIG_PROC_FS
Ingo Molnara460e742006-10-17 00:10:03 -0700179 struct proc_dir_entry *dir;
Ingo Molnar4a733ee2006-06-29 02:24:42 -0700180#endif
Ingo Molnara460e742006-10-17 00:10:03 -0700181 const char *name;
Ravikiran G Thirumalaie729aa12007-05-08 00:29:13 -0700182} ____cacheline_internodealigned_in_smp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Yinghai Lu9059d8f2008-08-19 20:50:10 -0700184
Ingo Molnar34ffdb72006-06-29 02:24:40 -0700185extern struct irq_desc irq_desc[NR_IRQS];
Yinghai Lu9059d8f2008-08-19 20:50:10 -0700186
Thomas Gleixnerc6b76742008-10-15 14:31:29 +0200187static inline struct irq_desc *irq_to_desc(unsigned int irq)
188{
189 return (irq < nr_irqs) ? irq_desc + irq : NULL;
190}
191
Ingo Molnar34ffdb72006-06-29 02:24:40 -0700192/*
193 * Migration helpers for obsolete names, they will go away:
194 */
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700195#define hw_interrupt_type irq_chip
196typedef struct irq_chip hw_irq_controller;
197#define no_irq_type no_irq_chip
Ingo Molnar34ffdb72006-06-29 02:24:40 -0700198typedef struct irq_desc irq_desc_t;
199
200/*
201 * Pick up the arch-dependent methods:
202 */
203#include <asm/hw_irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700205extern int setup_irq(unsigned int irq, struct irqaction *new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
207#ifdef CONFIG_GENERIC_HARDIRQS
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700208
Ashok Raj54d5d422005-09-06 15:16:15 -0700209#ifdef CONFIG_SMP
Ashok Raj54d5d422005-09-06 15:16:15 -0700210
Yinghai Lu8b8e8c12008-08-19 20:50:23 -0700211#ifdef CONFIG_GENERIC_PENDING_IRQ
Ashok Raj54d5d422005-09-06 15:16:15 -0700212
Andrew Mortonc777ac52006-03-25 03:07:36 -0800213void move_native_irq(int irq);
Eric W. Biedermane7b946e2006-10-04 02:16:29 -0700214void move_masked_irq(int irq);
Ashok Raj54d5d422005-09-06 15:16:15 -0700215
Yinghai Lu8b8e8c12008-08-19 20:50:23 -0700216#else /* CONFIG_GENERIC_PENDING_IRQ */
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700217
218static inline void move_irq(int irq)
219{
220}
221
222static inline void move_native_irq(int irq)
223{
224}
225
Eric W. Biedermane7b946e2006-10-04 02:16:29 -0700226static inline void move_masked_irq(int irq)
227{
228}
229
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700230#endif /* CONFIG_GENERIC_PENDING_IRQ */
Ashok Raj54d5d422005-09-06 15:16:15 -0700231
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700232#else /* CONFIG_SMP */
Ashok Raj54d5d422005-09-06 15:16:15 -0700233
Ashok Raj54d5d422005-09-06 15:16:15 -0700234#define move_native_irq(x)
Eric W. Biedermane7b946e2006-10-04 02:16:29 -0700235#define move_masked_irq(x)
Ashok Raj54d5d422005-09-06 15:16:15 -0700236
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700237#endif /* CONFIG_SMP */
Ashok Raj54d5d422005-09-06 15:16:15 -0700238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239extern int no_irq_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
Thomas Gleixner950f4422007-02-16 01:27:24 -0800241static inline int irq_balancing_disabled(unsigned int irq)
242{
Yinghai Lu08678b02008-08-19 20:50:05 -0700243 struct irq_desc *desc;
244
245 desc = irq_to_desc(irq);
246 return desc->status & IRQ_NO_BALANCING_MASK;
Thomas Gleixner950f4422007-02-16 01:27:24 -0800247}
248
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700249/* Handle irq action chains: */
David Howells7d12e782006-10-05 14:55:46 +0100250extern int handle_IRQ_event(unsigned int irq, struct irqaction *action);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700251
Ingo Molnar2e60bbb2006-06-29 02:24:39 -0700252/*
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700253 * Built-in IRQ handlers for various IRQ types,
254 * callable via desc->chip->handle_irq()
255 */
Harvey Harrisonec701582008-02-08 04:19:55 -0800256extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
257extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
258extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
259extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
260extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
261extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700262
263/*
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700264 * Monolithic do_IRQ implementation.
Ingo Molnar2e60bbb2006-06-29 02:24:39 -0700265 */
David Howellsaf8c65b2006-09-25 23:32:07 -0700266#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
Harvey Harrisonec701582008-02-08 04:19:55 -0800267extern unsigned int __do_IRQ(unsigned int irq);
David Howellsaf8c65b2006-09-25 23:32:07 -0700268#endif
Ingo Molnar2e60bbb2006-06-29 02:24:39 -0700269
Ingo Molnardae86202006-06-29 02:24:52 -0700270/*
271 * Architectures call this to let the generic IRQ layer
272 * handle an interrupt. If the descriptor is attached to an
273 * irqchip-style controller then we call the ->handle_irq() handler,
274 * and it calls __do_IRQ() if it's attached to an irqtype-style controller.
275 */
Yinghai Lu46926b62008-08-19 20:50:15 -0700276static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc)
Ingo Molnardae86202006-06-29 02:24:52 -0700277{
David Howellsaf8c65b2006-09-25 23:32:07 -0700278#ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
David Howells7d12e782006-10-05 14:55:46 +0100279 desc->handle_irq(irq, desc);
David Howellsaf8c65b2006-09-25 23:32:07 -0700280#else
Ingo Molnardae86202006-06-29 02:24:52 -0700281 if (likely(desc->handle_irq))
David Howells7d12e782006-10-05 14:55:46 +0100282 desc->handle_irq(irq, desc);
Ingo Molnardae86202006-06-29 02:24:52 -0700283 else
David Howells7d12e782006-10-05 14:55:46 +0100284 __do_IRQ(irq);
David Howellsaf8c65b2006-09-25 23:32:07 -0700285#endif
Ingo Molnardae86202006-06-29 02:24:52 -0700286}
287
Yinghai Lu46926b62008-08-19 20:50:15 -0700288static inline void generic_handle_irq(unsigned int irq)
289{
290 generic_handle_irq_desc(irq, irq_to_desc(irq));
291}
292
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700293/* Handling of unhandled and spurious interrupts: */
Ingo Molnar34ffdb72006-06-29 02:24:40 -0700294extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
David Howells7d12e782006-10-05 14:55:46 +0100295 int action_ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
Thomas Gleixnera4633adc2006-06-29 02:24:48 -0700297/* Resending of interrupts :*/
298void check_irq_resend(struct irq_desc *desc, unsigned int irq);
299
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700300/* Enable/disable irq debugging output: */
301extern int noirqdebug_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700303/* Checks whether the interrupt can be requested by request_irq(): */
304extern int can_request_irq(unsigned int irq, unsigned long irqflags);
305
Thomas Gleixnerf8b54732006-07-01 22:30:08 +0100306/* Dummy irq-chip implementations: */
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700307extern struct irq_chip no_irq_chip;
Thomas Gleixnerf8b54732006-07-01 22:30:08 +0100308extern struct irq_chip dummy_irq_chip;
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700309
310extern void
Ingo Molnar145fc652006-10-19 23:28:28 -0700311set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip,
312 irq_flow_handler_t handle);
313extern void
Ingo Molnara460e742006-10-17 00:10:03 -0700314set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
315 irq_flow_handler_t handle, const char *name);
316
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700317extern void
Ingo Molnara460e742006-10-17 00:10:03 -0700318__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
319 const char *name);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700320
Kevin Hilmanb019e572007-12-18 18:05:58 +0100321/* caller has locked the irq_desc and both params are valid */
322static inline void __set_irq_handler_unlocked(int irq,
323 irq_flow_handler_t handler)
324{
Yinghai Lu08678b02008-08-19 20:50:05 -0700325 struct irq_desc *desc;
326
327 desc = irq_to_desc(irq);
328 desc->handle_irq = handler;
Kevin Hilmanb019e572007-12-18 18:05:58 +0100329}
330
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700331/*
332 * Set a highlevel flow handler for a given IRQ:
333 */
334static inline void
David Howells57a58a92006-10-05 13:06:34 +0100335set_irq_handler(unsigned int irq, irq_flow_handler_t handle)
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700336{
Ingo Molnara460e742006-10-17 00:10:03 -0700337 __set_irq_handler(irq, handle, 0, NULL);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700338}
339
340/*
341 * Set a highlevel chained flow handler for a given IRQ.
342 * (a chained handler is automatically enabled and set to
343 * IRQ_NOREQUEST and IRQ_NOPROBE)
344 */
345static inline void
346set_irq_chained_handler(unsigned int irq,
David Howells57a58a92006-10-05 13:06:34 +0100347 irq_flow_handler_t handle)
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700348{
Ingo Molnara460e742006-10-17 00:10:03 -0700349 __set_irq_handler(irq, handle, 1, NULL);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700350}
351
Ralf Baechle46f4f8f2008-02-08 04:22:01 -0800352extern void set_irq_noprobe(unsigned int irq);
353extern void set_irq_probe(unsigned int irq);
354
Eric W. Biederman3a16d712006-10-04 02:16:37 -0700355/* Handle dynamic irq creation and destruction */
Yinghai Lu6d50bc22008-08-19 20:50:22 -0700356extern unsigned int create_irq_nr(unsigned int irq_want);
Eric W. Biederman3a16d712006-10-04 02:16:37 -0700357extern int create_irq(void);
358extern void destroy_irq(unsigned int irq);
Thomas Gleixnerdd87eb32006-06-29 02:24:53 -0700359
Eric W. Biederman1f800252006-10-04 02:16:56 -0700360/* Test to see if a driver has successfully requested an irq */
361static inline int irq_has_action(unsigned int irq)
362{
Yinghai Lu08678b02008-08-19 20:50:05 -0700363 struct irq_desc *desc = irq_to_desc(irq);
Eric W. Biederman1f800252006-10-04 02:16:56 -0700364 return desc->action != NULL;
365}
366
Eric W. Biederman3a16d712006-10-04 02:16:37 -0700367/* Dynamic irq helper functions */
368extern void dynamic_irq_init(unsigned int irq);
369extern void dynamic_irq_cleanup(unsigned int irq);
370
371/* Set/get chip/data for an IRQ: */
Thomas Gleixnerdd87eb32006-06-29 02:24:53 -0700372extern int set_irq_chip(unsigned int irq, struct irq_chip *chip);
373extern int set_irq_data(unsigned int irq, void *data);
374extern int set_irq_chip_data(unsigned int irq, void *data);
375extern int set_irq_type(unsigned int irq, unsigned int type);
Eric W. Biederman5b912c12007-01-28 12:52:03 -0700376extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
Thomas Gleixnerdd87eb32006-06-29 02:24:53 -0700377
Yinghai Lu08678b02008-08-19 20:50:05 -0700378#define get_irq_chip(irq) (irq_to_desc(irq)->chip)
379#define get_irq_chip_data(irq) (irq_to_desc(irq)->chip_data)
380#define get_irq_data(irq) (irq_to_desc(irq)->handler_data)
381#define get_irq_msi(irq) (irq_to_desc(irq)->msi_desc)
Thomas Gleixnerdd87eb32006-06-29 02:24:53 -0700382
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700383#endif /* CONFIG_GENERIC_HARDIRQS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700385#endif /* !CONFIG_S390 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700387#endif /* _LINUX_IRQ_H */