5 * Please do not include this file in generic code. There is currently
6 * no requirement for any architecture to implement anything held
12 #include <linux/smp.h>
16 #include <linux/linkage.h>
17 #include <linux/cache.h>
18 #include <linux/spinlock.h>
19 #include <linux/cpumask.h>
20 #include <linux/gfp.h>
21 #include <linux/irqreturn.h>
22 #include <linux/irqnr.h>
23 #include <linux/errno.h>
24 #include <linux/topology.h>
25 #include <linux/wait.h>
28 #include <asm/ptrace.h>
29 #include <asm/irq_regs.h>
34 typedef void (*irq_flow_handler_t)(unsigned int irq,
35 struct irq_desc *desc);
36 typedef void (*irq_preflow_handler_t)(struct irq_data *data);
41 * Bits 0-7 are the same as the IRQF_* bits in linux/interrupt.h
43 * IRQ_TYPE_NONE - default, unspecified type
44 * IRQ_TYPE_EDGE_RISING - rising edge triggered
45 * IRQ_TYPE_EDGE_FALLING - falling edge triggered
46 * IRQ_TYPE_EDGE_BOTH - rising and falling edge triggered
47 * IRQ_TYPE_LEVEL_HIGH - high level triggered
48 * IRQ_TYPE_LEVEL_LOW - low level triggered
49 * IRQ_TYPE_LEVEL_MASK - Mask to filter out the level bits
50 * IRQ_TYPE_SENSE_MASK - Mask for all the above bits
51 * IRQ_TYPE_PROBE - Special flag for probing in progress
53 * Bits which can be modified via irq_set/clear/modify_status_flags()
54 * IRQ_LEVEL - Interrupt is level type. Will be also
55 * updated in the code when the above trigger
56 * bits are modified via irq_set_irq_type()
57 * IRQ_PER_CPU - Mark an interrupt PER_CPU. Will protect
58 * it from affinity setting
59 * IRQ_NOPROBE - Interrupt cannot be probed by autoprobing
60 * IRQ_NOREQUEST - Interrupt cannot be requested via
62 * IRQ_NOAUTOEN - Interrupt is not automatically enabled in
64 * IRQ_NO_BALANCING - Interrupt cannot be balanced (affinity set)
65 * IRQ_MOVE_PCNTXT - Interrupt can be migrated from process context
66 * IRQ_NESTED_TRHEAD - Interrupt nests into another thread
69 IRQ_TYPE_NONE = 0x00000000,
70 IRQ_TYPE_EDGE_RISING = 0x00000001,
71 IRQ_TYPE_EDGE_FALLING = 0x00000002,
72 IRQ_TYPE_EDGE_BOTH = (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING),
73 IRQ_TYPE_LEVEL_HIGH = 0x00000004,
74 IRQ_TYPE_LEVEL_LOW = 0x00000008,
75 IRQ_TYPE_LEVEL_MASK = (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH),
76 IRQ_TYPE_SENSE_MASK = 0x0000000f,
78 IRQ_TYPE_PROBE = 0x00000010,
81 IRQ_PER_CPU = (1 << 9),
82 IRQ_NOPROBE = (1 << 10),
83 IRQ_NOREQUEST = (1 << 11),
84 IRQ_NOAUTOEN = (1 << 12),
85 IRQ_NO_BALANCING = (1 << 13),
86 IRQ_MOVE_PCNTXT = (1 << 14),
87 IRQ_NESTED_THREAD = (1 << 15),
90 #define IRQF_MODIFY_MASK \
91 (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \
92 IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \
93 IRQ_PER_CPU | IRQ_NESTED_THREAD)
95 #define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
97 static inline __deprecated bool CHECK_IRQ_PER_CPU(unsigned int status)
99 return status & IRQ_PER_CPU;
103 * Return value for chip->irq_set_affinity()
105 * IRQ_SET_MASK_OK - OK, core updates irq_data.affinity
106 * IRQ_SET_MASK_NOCPY - OK, chip did update irq_data.affinity
110 IRQ_SET_MASK_OK_NOCOPY,
116 * struct irq_data - per irq and irq chip data passed down to chip functions
117 * @irq: interrupt number
118 * @node: node index useful for balancing
119 * @state_use_accessors: status information for irq chip functions.
120 * Use accessor functions to deal with it
121 * @chip: low level interrupt hardware access
122 * @handler_data: per-IRQ data for the irq_chip methods
123 * @chip_data: platform-specific per-chip private data for the chip
124 * methods, to allow shared chip implementations
125 * @msi_desc: MSI descriptor
126 * @affinity: IRQ affinity on SMP
128 * The fields here need to overlay the ones in irq_desc until we
129 * cleaned up the direct references and switched everything over to
135 unsigned int state_use_accessors;
136 struct irq_chip *chip;
139 struct msi_desc *msi_desc;
141 cpumask_var_t affinity;
146 * Bit masks for irq_data.state
148 * IRQD_TRIGGER_MASK - Mask for the trigger type bits
149 * IRQD_SETAFFINITY_PENDING - Affinity setting is pending
150 * IRQD_NO_BALANCING - Balancing disabled for this IRQ
151 * IRQD_PER_CPU - Interrupt is per cpu
152 * IRQD_AFFINITY_SET - Interrupt affinity was set
153 * IRQD_LEVEL - Interrupt is level triggered
154 * IRQD_WAKEUP_STATE - Interrupt is configured for wakeup
156 * IRDQ_MOVE_PCNTXT - Interrupt can be moved in process
158 * IRQD_IRQ_DISABLED - Disabled state of the interrupt
159 * IRQD_IRQ_MASKED - Masked state of the interrupt
160 * IRQD_IRQ_INPROGRESS - In progress state of the interrupt
163 IRQD_TRIGGER_MASK = 0xf,
164 IRQD_SETAFFINITY_PENDING = (1 << 8),
165 IRQD_NO_BALANCING = (1 << 10),
166 IRQD_PER_CPU = (1 << 11),
167 IRQD_AFFINITY_SET = (1 << 12),
168 IRQD_LEVEL = (1 << 13),
169 IRQD_WAKEUP_STATE = (1 << 14),
170 IRQD_MOVE_PCNTXT = (1 << 15),
171 IRQD_IRQ_DISABLED = (1 << 16),
172 IRQD_IRQ_MASKED = (1 << 17),
173 IRQD_IRQ_INPROGRESS = (1 << 18),
176 static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
178 return d->state_use_accessors & IRQD_SETAFFINITY_PENDING;
181 static inline bool irqd_is_per_cpu(struct irq_data *d)
183 return d->state_use_accessors & IRQD_PER_CPU;
186 static inline bool irqd_can_balance(struct irq_data *d)
188 return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING));
191 static inline bool irqd_affinity_was_set(struct irq_data *d)
193 return d->state_use_accessors & IRQD_AFFINITY_SET;
196 static inline void irqd_mark_affinity_was_set(struct irq_data *d)
198 d->state_use_accessors |= IRQD_AFFINITY_SET;
201 static inline u32 irqd_get_trigger_type(struct irq_data *d)
203 return d->state_use_accessors & IRQD_TRIGGER_MASK;
207 * Must only be called inside irq_chip.irq_set_type() functions.
209 static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)
211 d->state_use_accessors &= ~IRQD_TRIGGER_MASK;
212 d->state_use_accessors |= type & IRQD_TRIGGER_MASK;
215 static inline bool irqd_is_level_type(struct irq_data *d)
217 return d->state_use_accessors & IRQD_LEVEL;
220 static inline bool irqd_is_wakeup_set(struct irq_data *d)
222 return d->state_use_accessors & IRQD_WAKEUP_STATE;
225 static inline bool irqd_can_move_in_process_context(struct irq_data *d)
227 return d->state_use_accessors & IRQD_MOVE_PCNTXT;
230 static inline bool irqd_irq_disabled(struct irq_data *d)
232 return d->state_use_accessors & IRQD_IRQ_DISABLED;
235 static inline bool irqd_irq_masked(struct irq_data *d)
237 return d->state_use_accessors & IRQD_IRQ_MASKED;
240 static inline bool irqd_irq_inprogress(struct irq_data *d)
242 return d->state_use_accessors & IRQD_IRQ_INPROGRESS;
246 * Functions for chained handlers which can be enabled/disabled by the
247 * standard disable_irq/enable_irq calls. Must be called with
248 * irq_desc->lock held.
250 static inline void irqd_set_chained_irq_inprogress(struct irq_data *d)
252 d->state_use_accessors |= IRQD_IRQ_INPROGRESS;
255 static inline void irqd_clr_chained_irq_inprogress(struct irq_data *d)
257 d->state_use_accessors &= ~IRQD_IRQ_INPROGRESS;
261 * struct irq_chip - hardware interrupt chip descriptor
263 * @name: name for /proc/interrupts
264 * @irq_startup: start up the interrupt (defaults to ->enable if NULL)
265 * @irq_shutdown: shut down the interrupt (defaults to ->disable if NULL)
266 * @irq_enable: enable the interrupt (defaults to chip->unmask if NULL)
267 * @irq_disable: disable the interrupt
268 * @irq_ack: start of a new interrupt
269 * @irq_mask: mask an interrupt source
270 * @irq_mask_ack: ack and mask an interrupt source
271 * @irq_unmask: unmask an interrupt source
272 * @irq_eoi: end of interrupt
273 * @irq_set_affinity: set the CPU affinity on SMP machines
274 * @irq_retrigger: resend an IRQ to the CPU
275 * @irq_set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
276 * @irq_set_wake: enable/disable power-management wake-on of an IRQ
277 * @irq_bus_lock: function to lock access to slow bus (i2c) chips
278 * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
279 * @irq_cpu_online: configure an interrupt source for a secondary CPU
280 * @irq_cpu_offline: un-configure an interrupt source for a secondary CPU
281 * @irq_print_chip: optional to print special chip info in show_interrupts
282 * @flags: chip specific flags
284 * @release: release function solely used by UML
288 unsigned int (*irq_startup)(struct irq_data *data);
289 void (*irq_shutdown)(struct irq_data *data);
290 void (*irq_enable)(struct irq_data *data);
291 void (*irq_disable)(struct irq_data *data);
293 void (*irq_ack)(struct irq_data *data);
294 void (*irq_mask)(struct irq_data *data);
295 void (*irq_mask_ack)(struct irq_data *data);
296 void (*irq_unmask)(struct irq_data *data);
297 void (*irq_eoi)(struct irq_data *data);
299 int (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force);
300 int (*irq_retrigger)(struct irq_data *data);
301 int (*irq_set_type)(struct irq_data *data, unsigned int flow_type);
302 int (*irq_set_wake)(struct irq_data *data, unsigned int on);
304 void (*irq_bus_lock)(struct irq_data *data);
305 void (*irq_bus_sync_unlock)(struct irq_data *data);
307 void (*irq_cpu_online)(struct irq_data *data);
308 void (*irq_cpu_offline)(struct irq_data *data);
310 void (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
314 /* Currently used only by UML, might disappear one day.*/
315 #ifdef CONFIG_IRQ_RELEASE_METHOD
316 void (*release)(unsigned int irq, void *dev_id);
321 * irq_chip specific flags
323 * IRQCHIP_SET_TYPE_MASKED: Mask before calling chip.irq_set_type()
324 * IRQCHIP_EOI_IF_HANDLED: Only issue irq_eoi() when irq was handled
325 * IRQCHIP_MASK_ON_SUSPEND: Mask non wake irqs in the suspend path
326 * IRQCHIP_ONOFFLINE_ENABLED: Only call irq_on/off_line callbacks
330 IRQCHIP_SET_TYPE_MASKED = (1 << 0),
331 IRQCHIP_EOI_IF_HANDLED = (1 << 1),
332 IRQCHIP_MASK_ON_SUSPEND = (1 << 2),
333 IRQCHIP_ONOFFLINE_ENABLED = (1 << 3),
336 /* This include will go away once we isolated irq_desc usage to core code */
337 #include <linux/irqdesc.h>
340 * Pick up the arch-dependent methods:
342 #include <asm/hw_irq.h>
344 #ifndef NR_IRQS_LEGACY
345 # define NR_IRQS_LEGACY 0
348 #ifndef ARCH_IRQ_INIT_FLAGS
349 # define ARCH_IRQ_INIT_FLAGS 0
352 #define IRQ_DEFAULT_INIT_FLAGS ARCH_IRQ_INIT_FLAGS
355 extern int setup_irq(unsigned int irq, struct irqaction *new);
356 extern void remove_irq(unsigned int irq, struct irqaction *act);
358 extern void irq_cpu_online(void);
359 extern void irq_cpu_offline(void);
360 extern int __irq_set_affinity_locked(struct irq_data *data, const struct cpumask *cpumask);
362 #ifdef CONFIG_GENERIC_HARDIRQS
364 #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
365 void irq_move_irq(struct irq_data *data);
366 void irq_move_masked_irq(struct irq_data *data);
368 static inline void irq_move_irq(struct irq_data *data) { }
369 static inline void irq_move_masked_irq(struct irq_data *data) { }
372 extern int no_irq_affinity;
375 * Built-in IRQ handlers for various IRQ types,
376 * callable via desc->handle_irq()
378 extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
379 extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
380 extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
381 extern void handle_edge_eoi_irq(unsigned int irq, struct irq_desc *desc);
382 extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
383 extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
384 extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
385 extern void handle_nested_irq(unsigned int irq);
387 /* Handling of unhandled and spurious interrupts: */
388 extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
389 irqreturn_t action_ret);
392 /* Enable/disable irq debugging output: */
393 extern int noirqdebug_setup(char *str);
395 /* Checks whether the interrupt can be requested by request_irq(): */
396 extern int can_request_irq(unsigned int irq, unsigned long irqflags);
398 /* Dummy irq-chip implementations: */
399 extern struct irq_chip no_irq_chip;
400 extern struct irq_chip dummy_irq_chip;
403 irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
404 irq_flow_handler_t handle, const char *name);
406 static inline void irq_set_chip_and_handler(unsigned int irq, struct irq_chip *chip,
407 irq_flow_handler_t handle)
409 irq_set_chip_and_handler_name(irq, chip, handle, NULL);
413 __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
417 irq_set_handler(unsigned int irq, irq_flow_handler_t handle)
419 __irq_set_handler(irq, handle, 0, NULL);
423 * Set a highlevel chained flow handler for a given IRQ.
424 * (a chained handler is automatically enabled and set to
425 * IRQ_NOREQUEST and IRQ_NOPROBE)
428 irq_set_chained_handler(unsigned int irq, irq_flow_handler_t handle)
430 __irq_set_handler(irq, handle, 1, NULL);
433 void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set);
435 static inline void irq_set_status_flags(unsigned int irq, unsigned long set)
437 irq_modify_status(irq, 0, set);
440 static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr)
442 irq_modify_status(irq, clr, 0);
445 static inline void irq_set_noprobe(unsigned int irq)
447 irq_modify_status(irq, 0, IRQ_NOPROBE);
450 static inline void irq_set_probe(unsigned int irq)
452 irq_modify_status(irq, IRQ_NOPROBE, 0);
455 static inline void irq_set_nested_thread(unsigned int irq, bool nest)
458 irq_set_status_flags(irq, IRQ_NESTED_THREAD);
460 irq_clear_status_flags(irq, IRQ_NESTED_THREAD);
463 /* Handle dynamic irq creation and destruction */
464 extern unsigned int create_irq_nr(unsigned int irq_want, int node);
465 extern int create_irq(void);
466 extern void destroy_irq(unsigned int irq);
469 * Dynamic irq helper functions. Obsolete. Use irq_alloc_desc* and
470 * irq_free_desc instead.
472 extern void dynamic_irq_cleanup(unsigned int irq);
473 static inline void dynamic_irq_init(unsigned int irq)
475 dynamic_irq_cleanup(irq);
478 /* Set/get chip/data for an IRQ: */
479 extern int irq_set_chip(unsigned int irq, struct irq_chip *chip);
480 extern int irq_set_handler_data(unsigned int irq, void *data);
481 extern int irq_set_chip_data(unsigned int irq, void *data);
482 extern int irq_set_irq_type(unsigned int irq, unsigned int type);
483 extern int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry);
484 extern struct irq_data *irq_get_irq_data(unsigned int irq);
486 static inline struct irq_chip *irq_get_chip(unsigned int irq)
488 struct irq_data *d = irq_get_irq_data(irq);
489 return d ? d->chip : NULL;
492 static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d)
497 static inline void *irq_get_chip_data(unsigned int irq)
499 struct irq_data *d = irq_get_irq_data(irq);
500 return d ? d->chip_data : NULL;
503 static inline void *irq_data_get_irq_chip_data(struct irq_data *d)
508 static inline void *irq_get_handler_data(unsigned int irq)
510 struct irq_data *d = irq_get_irq_data(irq);
511 return d ? d->handler_data : NULL;
514 static inline void *irq_data_get_irq_handler_data(struct irq_data *d)
516 return d->handler_data;
519 static inline struct msi_desc *irq_get_msi_desc(unsigned int irq)
521 struct irq_data *d = irq_get_irq_data(irq);
522 return d ? d->msi_desc : NULL;
525 static inline struct msi_desc *irq_data_get_msi(struct irq_data *d)
530 int irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node);
531 void irq_free_descs(unsigned int irq, unsigned int cnt);
532 int irq_reserve_irqs(unsigned int from, unsigned int cnt);
534 static inline int irq_alloc_desc(int node)
536 return irq_alloc_descs(-1, 0, 1, node);
539 static inline int irq_alloc_desc_at(unsigned int at, int node)
541 return irq_alloc_descs(at, at, 1, node);
544 static inline int irq_alloc_desc_from(unsigned int from, int node)
546 return irq_alloc_descs(-1, from, 1, node);
549 static inline void irq_free_desc(unsigned int irq)
551 irq_free_descs(irq, 1);
554 static inline int irq_reserve_irq(unsigned int irq)
556 return irq_reserve_irqs(irq, 1);
559 #endif /* CONFIG_GENERIC_HARDIRQS */
561 #endif /* !CONFIG_S390 */
563 #endif /* _LINUX_IRQ_H */