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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>
David Howells77904fd2007-02-28 20:13:26 -080021#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#include <asm/irq.h>
24#include <asm/ptrace.h>
David Howells7d12e782006-10-05 14:55:46 +010025#include <asm/irq_regs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
David Howells57a58a92006-10-05 13:06:34 +010027struct irq_desc;
Harvey Harrisonec701582008-02-08 04:19:55 -080028typedef void (*irq_flow_handler_t)(unsigned int irq,
David Howells7d12e782006-10-05 14:55:46 +010029 struct irq_desc *desc);
David Howells57a58a92006-10-05 13:06:34 +010030
31
Linus Torvalds1da177e2005-04-16 15:20:36 -070032/*
33 * IRQ line status.
Thomas Gleixner6e213612006-07-01 19:29:03 -070034 *
Thomas Gleixner950f4422007-02-16 01:27:24 -080035 * Bits 0-7 are reserved for the IRQF_* bits in linux/interrupt.h
Thomas Gleixner6e213612006-07-01 19:29:03 -070036 *
37 * IRQ types
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 */
Thomas Gleixner6e213612006-07-01 19:29:03 -070039#define IRQ_TYPE_NONE 0x00000000 /* Default, unspecified type */
40#define IRQ_TYPE_EDGE_RISING 0x00000001 /* Edge rising type */
41#define IRQ_TYPE_EDGE_FALLING 0x00000002 /* Edge falling type */
42#define IRQ_TYPE_EDGE_BOTH (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)
43#define IRQ_TYPE_LEVEL_HIGH 0x00000004 /* Level high type */
44#define IRQ_TYPE_LEVEL_LOW 0x00000008 /* Level low type */
45#define IRQ_TYPE_SENSE_MASK 0x0000000f /* Mask of the above */
46#define IRQ_TYPE_PROBE 0x00000010 /* Probing in progress */
47
48/* Internal flags */
Thomas Gleixner950f4422007-02-16 01:27:24 -080049#define IRQ_INPROGRESS 0x00000100 /* IRQ handler active - do not enter! */
50#define IRQ_DISABLED 0x00000200 /* IRQ disabled - do not enter! */
51#define IRQ_PENDING 0x00000400 /* IRQ pending - replay on enable */
52#define IRQ_REPLAY 0x00000800 /* IRQ has been replayed but not acked yet */
53#define IRQ_AUTODETECT 0x00001000 /* IRQ is being autodetected */
54#define IRQ_WAITING 0x00002000 /* IRQ not yet seen - for autodetection */
55#define IRQ_LEVEL 0x00004000 /* IRQ level triggered */
56#define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */
57#define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */
58#define IRQ_NOPROBE 0x00020000 /* IRQ is not valid for probing */
59#define IRQ_NOREQUEST 0x00040000 /* IRQ cannot be requested */
60#define IRQ_NOAUTOEN 0x00080000 /* IRQ will not be enabled on request irq */
Ingo Molnard7e25f32007-02-16 01:28:24 -080061#define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */
62#define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */
63#define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */
Thomas Gleixner950f4422007-02-16 01:27:24 -080064
Ingo Molnar0d7012a2006-06-29 02:24:43 -070065#ifdef CONFIG_IRQ_PER_CPU
Karsten Wiesef26fdd52005-09-06 15:17:25 -070066# define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
Thomas Gleixner950f4422007-02-16 01:27:24 -080067# define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
Karsten Wiesef26fdd52005-09-06 15:17:25 -070068#else
69# define CHECK_IRQ_PER_CPU(var) 0
Thomas Gleixner950f4422007-02-16 01:27:24 -080070# define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING
Karsten Wiesef26fdd52005-09-06 15:17:25 -070071#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -070073struct proc_dir_entry;
Eric W. Biederman5b912c12007-01-28 12:52:03 -070074struct msi_desc;
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -070075
Ingo Molnar8fee5c32006-06-29 02:24:45 -070076/**
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -070077 * struct irq_chip - hardware interrupt chip descriptor
Ingo Molnar8fee5c32006-06-29 02:24:45 -070078 *
79 * @name: name for /proc/interrupts
80 * @startup: start up the interrupt (defaults to ->enable if NULL)
81 * @shutdown: shut down the interrupt (defaults to ->disable if NULL)
82 * @enable: enable the interrupt (defaults to chip->unmask if NULL)
83 * @disable: disable the interrupt (defaults to chip->mask if NULL)
Ingo Molnar8fee5c32006-06-29 02:24:45 -070084 * @ack: start of a new interrupt
85 * @mask: mask an interrupt source
86 * @mask_ack: ack and mask an interrupt source
87 * @unmask: unmask an interrupt source
Ingo Molnar47c2a3a2006-06-29 02:25:03 -070088 * @eoi: end of interrupt - chip level
89 * @end: end of interrupt - flow level
Ingo Molnar8fee5c32006-06-29 02:24:45 -070090 * @set_affinity: set the CPU affinity on SMP machines
91 * @retrigger: resend an IRQ to the CPU
92 * @set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
93 * @set_wake: enable/disable power-management wake-on of an IRQ
94 *
95 * @release: release function solely used by UML
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -070096 * @typename: obsoleted by name, kept as migration helper
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 */
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -070098struct irq_chip {
99 const char *name;
Ingo Molnar71d218b2006-06-29 02:24:41 -0700100 unsigned int (*startup)(unsigned int irq);
101 void (*shutdown)(unsigned int irq);
102 void (*enable)(unsigned int irq);
103 void (*disable)(unsigned int irq);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700104
Ingo Molnar71d218b2006-06-29 02:24:41 -0700105 void (*ack)(unsigned int irq);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700106 void (*mask)(unsigned int irq);
107 void (*mask_ack)(unsigned int irq);
108 void (*unmask)(unsigned int irq);
Ingo Molnar47c2a3a2006-06-29 02:25:03 -0700109 void (*eoi)(unsigned int irq);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700110
Ingo Molnar71d218b2006-06-29 02:24:41 -0700111 void (*end)(unsigned int irq);
112 void (*set_affinity)(unsigned int irq, cpumask_t dest);
Ingo Molnarc0ad90a2006-06-29 02:24:44 -0700113 int (*retrigger)(unsigned int irq);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700114 int (*set_type)(unsigned int irq, unsigned int flow_type);
115 int (*set_wake)(unsigned int irq, unsigned int on);
Ingo Molnarc0ad90a2006-06-29 02:24:44 -0700116
Paolo 'Blaisorblade' Giarrussob77d6ad2005-06-21 17:16:24 -0700117 /* Currently used only by UML, might disappear one day.*/
118#ifdef CONFIG_IRQ_RELEASE_METHOD
Ingo Molnar71d218b2006-06-29 02:24:41 -0700119 void (*release)(unsigned int irq, void *dev_id);
Paolo 'Blaisorblade' Giarrussob77d6ad2005-06-21 17:16:24 -0700120#endif
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700121 /*
122 * For compatibility, ->typename is copied into ->name.
123 * Will disappear.
124 */
125 const char *typename;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126};
127
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700128/**
129 * struct irq_desc - interrupt descriptor
130 *
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700131 * @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()]
132 * @chip: low level interrupt hardware access
Randy Dunlap472900b2007-02-16 01:28:25 -0800133 * @msi_desc: MSI descriptor
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700134 * @handler_data: per-IRQ data for the irq_chip methods
135 * @chip_data: platform-specific per-chip private data for the chip
136 * methods, to allow shared chip implementations
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700137 * @action: the irq action chain
138 * @status: status information
139 * @depth: disable-depth, for nested irq_disable() calls
David Brownell15a647e2006-07-30 03:03:08 -0700140 * @wake_depth: enable depth, for multiple set_irq_wake() callers
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700141 * @irq_count: stats field to detect stalled irqs
142 * @irqs_unhandled: stats field for spurious unhandled interrupts
Randy Dunlap5ac4d822007-07-31 00:39:03 -0700143 * @last_unhandled: aging timer for unhandled count
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700144 * @lock: locking for SMP
145 * @affinity: IRQ affinity on SMP
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700146 * @cpu: cpu index useful for balancing
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700147 * @pending_mask: pending rebalanced interrupts
Ingo Molnar8fee5c32006-06-29 02:24:45 -0700148 * @dir: /proc/irq/ procfs entry
149 * @affinity_entry: /proc/irq/smp_affinity procfs entry on SMP
Ingo Molnara460e742006-10-17 00:10:03 -0700150 * @name: flow handler name for /proc/interrupts output
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 */
Ingo Molnar34ffdb72006-06-29 02:24:40 -0700152struct irq_desc {
David Howells57a58a92006-10-05 13:06:34 +0100153 irq_flow_handler_t handle_irq;
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700154 struct irq_chip *chip;
Eric W. Biederman5b912c12007-01-28 12:52:03 -0700155 struct msi_desc *msi_desc;
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700156 void *handler_data;
Ingo Molnar71d218b2006-06-29 02:24:41 -0700157 void *chip_data;
158 struct irqaction *action; /* IRQ action list */
159 unsigned int status; /* IRQ status */
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700160
Ingo Molnar71d218b2006-06-29 02:24:41 -0700161 unsigned int depth; /* nested irq disables */
David Brownell15a647e2006-07-30 03:03:08 -0700162 unsigned int wake_depth; /* nested wake enables */
Ingo Molnar71d218b2006-06-29 02:24:41 -0700163 unsigned int irq_count; /* For detecting broken IRQs */
164 unsigned int irqs_unhandled;
Alan Cox4f27c002007-07-15 23:40:55 -0700165 unsigned long last_unhandled; /* Aging timer for unhandled count */
Ingo Molnar71d218b2006-06-29 02:24:41 -0700166 spinlock_t lock;
Ingo Molnara53da522006-06-29 02:24:38 -0700167#ifdef CONFIG_SMP
Ingo Molnar71d218b2006-06-29 02:24:41 -0700168 cpumask_t affinity;
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700169 unsigned int cpu;
Ingo Molnara53da522006-06-29 02:24:38 -0700170#endif
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700171#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
Ingo Molnarcd916d32006-06-29 02:24:42 -0700172 cpumask_t pending_mask;
Ashok Raj54d5d422005-09-06 15:16:15 -0700173#endif
Ingo Molnar4a733ee2006-06-29 02:24:42 -0700174#ifdef CONFIG_PROC_FS
Ingo Molnara460e742006-10-17 00:10:03 -0700175 struct proc_dir_entry *dir;
Ingo Molnar4a733ee2006-06-29 02:24:42 -0700176#endif
Ingo Molnara460e742006-10-17 00:10:03 -0700177 const char *name;
Ravikiran G Thirumalaie729aa12007-05-08 00:29:13 -0700178} ____cacheline_internodealigned_in_smp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Ingo Molnar34ffdb72006-06-29 02:24:40 -0700180extern struct irq_desc irq_desc[NR_IRQS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Ingo Molnar34ffdb72006-06-29 02:24:40 -0700182/*
183 * Migration helpers for obsolete names, they will go away:
184 */
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700185#define hw_interrupt_type irq_chip
186typedef struct irq_chip hw_irq_controller;
187#define no_irq_type no_irq_chip
Ingo Molnar34ffdb72006-06-29 02:24:40 -0700188typedef struct irq_desc irq_desc_t;
189
190/*
191 * Pick up the arch-dependent methods:
192 */
193#include <asm/hw_irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700195extern int setup_irq(unsigned int irq, struct irqaction *new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196
197#ifdef CONFIG_GENERIC_HARDIRQS
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700198
Thomas Gleixnerd061daa2006-07-03 02:18:48 +0200199#ifndef handle_dynamic_tick
200# define handle_dynamic_tick(a) do { } while (0)
201#endif
202
Ashok Raj54d5d422005-09-06 15:16:15 -0700203#ifdef CONFIG_SMP
Ashok Raj54d5d422005-09-06 15:16:15 -0700204
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700205#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
Ashok Raj54d5d422005-09-06 15:16:15 -0700206
Andrew Mortonc777ac52006-03-25 03:07:36 -0800207void set_pending_irq(unsigned int irq, cpumask_t mask);
208void move_native_irq(int irq);
Eric W. Biedermane7b946e2006-10-04 02:16:29 -0700209void move_masked_irq(int irq);
Ashok Raj54d5d422005-09-06 15:16:15 -0700210
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700211#else /* CONFIG_GENERIC_PENDING_IRQ || CONFIG_IRQBALANCE */
212
213static inline void move_irq(int irq)
214{
215}
216
217static inline void move_native_irq(int irq)
218{
219}
220
Eric W. Biedermane7b946e2006-10-04 02:16:29 -0700221static inline void move_masked_irq(int irq)
222{
223}
224
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700225static inline void set_pending_irq(unsigned int irq, cpumask_t mask)
226{
227}
228
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700229#endif /* CONFIG_GENERIC_PENDING_IRQ */
Ashok Raj54d5d422005-09-06 15:16:15 -0700230
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700231#else /* CONFIG_SMP */
Ashok Raj54d5d422005-09-06 15:16:15 -0700232
Ashok Raj54d5d422005-09-06 15:16:15 -0700233#define move_native_irq(x)
Eric W. Biedermane7b946e2006-10-04 02:16:29 -0700234#define move_masked_irq(x)
Ashok Raj54d5d422005-09-06 15:16:15 -0700235
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700236#endif /* CONFIG_SMP */
Ashok Raj54d5d422005-09-06 15:16:15 -0700237
Zhang Yanmin1b61b912006-06-23 02:04:22 -0700238#ifdef CONFIG_IRQBALANCE
239extern void set_balance_irq_affinity(unsigned int irq, cpumask_t mask);
240#else
241static inline void set_balance_irq_affinity(unsigned int irq, cpumask_t mask)
242{
243}
244#endif
245
Ingo Molnar71d218b2006-06-29 02:24:41 -0700246#ifdef CONFIG_AUTO_IRQ_AFFINITY
247extern int select_smp_affinity(unsigned int irq);
248#else
249static inline int select_smp_affinity(unsigned int irq)
250{
251 return 1;
252}
253#endif
254
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255extern int no_irq_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
Thomas Gleixner950f4422007-02-16 01:27:24 -0800257static inline int irq_balancing_disabled(unsigned int irq)
258{
259 return irq_desc[irq].status & IRQ_NO_BALANCING_MASK;
260}
261
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700262/* Handle irq action chains: */
David Howells7d12e782006-10-05 14:55:46 +0100263extern int handle_IRQ_event(unsigned int irq, struct irqaction *action);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700264
Ingo Molnar2e60bbb2006-06-29 02:24:39 -0700265/*
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700266 * Built-in IRQ handlers for various IRQ types,
267 * callable via desc->chip->handle_irq()
268 */
Harvey Harrisonec701582008-02-08 04:19:55 -0800269extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
270extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
271extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
272extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
273extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
274extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700275
276/*
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700277 * Monolithic do_IRQ implementation.
Ingo Molnar2e60bbb2006-06-29 02:24:39 -0700278 */
David Howellsaf8c65b2006-09-25 23:32:07 -0700279#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
Harvey Harrisonec701582008-02-08 04:19:55 -0800280extern unsigned int __do_IRQ(unsigned int irq);
David Howellsaf8c65b2006-09-25 23:32:07 -0700281#endif
Ingo Molnar2e60bbb2006-06-29 02:24:39 -0700282
Ingo Molnardae86202006-06-29 02:24:52 -0700283/*
284 * Architectures call this to let the generic IRQ layer
285 * handle an interrupt. If the descriptor is attached to an
286 * irqchip-style controller then we call the ->handle_irq() handler,
287 * and it calls __do_IRQ() if it's attached to an irqtype-style controller.
288 */
David Howells7d12e782006-10-05 14:55:46 +0100289static inline void generic_handle_irq(unsigned int irq)
Ingo Molnardae86202006-06-29 02:24:52 -0700290{
291 struct irq_desc *desc = irq_desc + irq;
292
David Howellsaf8c65b2006-09-25 23:32:07 -0700293#ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
David Howells7d12e782006-10-05 14:55:46 +0100294 desc->handle_irq(irq, desc);
David Howellsaf8c65b2006-09-25 23:32:07 -0700295#else
Ingo Molnardae86202006-06-29 02:24:52 -0700296 if (likely(desc->handle_irq))
David Howells7d12e782006-10-05 14:55:46 +0100297 desc->handle_irq(irq, desc);
Ingo Molnardae86202006-06-29 02:24:52 -0700298 else
David Howells7d12e782006-10-05 14:55:46 +0100299 __do_IRQ(irq);
David Howellsaf8c65b2006-09-25 23:32:07 -0700300#endif
Ingo Molnardae86202006-06-29 02:24:52 -0700301}
302
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700303/* Handling of unhandled and spurious interrupts: */
Ingo Molnar34ffdb72006-06-29 02:24:40 -0700304extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
David Howells7d12e782006-10-05 14:55:46 +0100305 int action_ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
Thomas Gleixnera4633adc2006-06-29 02:24:48 -0700307/* Resending of interrupts :*/
308void check_irq_resend(struct irq_desc *desc, unsigned int irq);
309
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700310/* Enable/disable irq debugging output: */
311extern int noirqdebug_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700313/* Checks whether the interrupt can be requested by request_irq(): */
314extern int can_request_irq(unsigned int irq, unsigned long irqflags);
315
Thomas Gleixnerf8b54732006-07-01 22:30:08 +0100316/* Dummy irq-chip implementations: */
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700317extern struct irq_chip no_irq_chip;
Thomas Gleixnerf8b54732006-07-01 22:30:08 +0100318extern struct irq_chip dummy_irq_chip;
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700319
320extern void
Ingo Molnar145fc652006-10-19 23:28:28 -0700321set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip,
322 irq_flow_handler_t handle);
323extern void
Ingo Molnara460e742006-10-17 00:10:03 -0700324set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
325 irq_flow_handler_t handle, const char *name);
326
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700327extern void
Ingo Molnara460e742006-10-17 00:10:03 -0700328__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
329 const char *name);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700330
Kevin Hilmanb019e572007-12-18 18:05:58 +0100331/* caller has locked the irq_desc and both params are valid */
332static inline void __set_irq_handler_unlocked(int irq,
333 irq_flow_handler_t handler)
334{
335 irq_desc[irq].handle_irq = handler;
336}
337
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700338/*
339 * Set a highlevel flow handler for a given IRQ:
340 */
341static inline void
David Howells57a58a92006-10-05 13:06:34 +0100342set_irq_handler(unsigned int irq, irq_flow_handler_t handle)
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700343{
Ingo Molnara460e742006-10-17 00:10:03 -0700344 __set_irq_handler(irq, handle, 0, NULL);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700345}
346
347/*
348 * Set a highlevel chained flow handler for a given IRQ.
349 * (a chained handler is automatically enabled and set to
350 * IRQ_NOREQUEST and IRQ_NOPROBE)
351 */
352static inline void
353set_irq_chained_handler(unsigned int irq,
David Howells57a58a92006-10-05 13:06:34 +0100354 irq_flow_handler_t handle)
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700355{
Ingo Molnara460e742006-10-17 00:10:03 -0700356 __set_irq_handler(irq, handle, 1, NULL);
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700357}
358
Ralf Baechle46f4f8f2008-02-08 04:22:01 -0800359extern void set_irq_noprobe(unsigned int irq);
360extern void set_irq_probe(unsigned int irq);
361
Eric W. Biederman3a16d712006-10-04 02:16:37 -0700362/* Handle dynamic irq creation and destruction */
363extern int create_irq(void);
364extern void destroy_irq(unsigned int irq);
Thomas Gleixnerdd87eb32006-06-29 02:24:53 -0700365
Eric W. Biederman1f800252006-10-04 02:16:56 -0700366/* Test to see if a driver has successfully requested an irq */
367static inline int irq_has_action(unsigned int irq)
368{
369 struct irq_desc *desc = irq_desc + irq;
370 return desc->action != NULL;
371}
372
Eric W. Biederman3a16d712006-10-04 02:16:37 -0700373/* Dynamic irq helper functions */
374extern void dynamic_irq_init(unsigned int irq);
375extern void dynamic_irq_cleanup(unsigned int irq);
376
377/* Set/get chip/data for an IRQ: */
Thomas Gleixnerdd87eb32006-06-29 02:24:53 -0700378extern int set_irq_chip(unsigned int irq, struct irq_chip *chip);
379extern int set_irq_data(unsigned int irq, void *data);
380extern int set_irq_chip_data(unsigned int irq, void *data);
381extern int set_irq_type(unsigned int irq, unsigned int type);
Eric W. Biederman5b912c12007-01-28 12:52:03 -0700382extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
Thomas Gleixnerdd87eb32006-06-29 02:24:53 -0700383
384#define get_irq_chip(irq) (irq_desc[irq].chip)
385#define get_irq_chip_data(irq) (irq_desc[irq].chip_data)
386#define get_irq_data(irq) (irq_desc[irq].handler_data)
Eric W. Biederman5b912c12007-01-28 12:52:03 -0700387#define get_irq_msi(irq) (irq_desc[irq].msi_desc)
Thomas Gleixnerdd87eb32006-06-29 02:24:53 -0700388
Thomas Gleixner6a6de9e2006-06-29 02:24:51 -0700389#endif /* CONFIG_GENERIC_HARDIRQS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700391#endif /* !CONFIG_S390 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Ingo Molnar06fcb0c2006-06-29 02:24:40 -0700393#endif /* _LINUX_IRQ_H */