1 /* SPDX-License-Identifier: GPL-2.0 */
6 * Please do not include this file in generic code. There is currently
7 * no requirement for any architecture to implement anything held
13 #include <linux/cache.h>
14 #include <linux/spinlock.h>
15 #include <linux/cpumask.h>
16 #include <linux/irqhandler.h>
17 #include <linux/irqreturn.h>
18 #include <linux/irqnr.h>
19 #include <linux/topology.h>
21 #include <linux/slab.h>
24 #include <asm/ptrace.h>
25 #include <asm/irq_regs.h>
30 struct irq_affinity_desc;
31 enum irqchip_irq_state;
36 * Bits 0-7 are the same as the IRQF_* bits in linux/interrupt.h
38 * IRQ_TYPE_NONE - default, unspecified type
39 * IRQ_TYPE_EDGE_RISING - rising edge triggered
40 * IRQ_TYPE_EDGE_FALLING - falling edge triggered
41 * IRQ_TYPE_EDGE_BOTH - rising and falling edge triggered
42 * IRQ_TYPE_LEVEL_HIGH - high level triggered
43 * IRQ_TYPE_LEVEL_LOW - low level triggered
44 * IRQ_TYPE_LEVEL_MASK - Mask to filter out the level bits
45 * IRQ_TYPE_SENSE_MASK - Mask for all the above bits
46 * IRQ_TYPE_DEFAULT - For use by some PICs to ask irq_set_type
47 * to setup the HW to a sane default (used
48 * by irqdomain map() callbacks to synchronize
49 * the HW state and SW flags for a newly
50 * allocated descriptor).
52 * IRQ_TYPE_PROBE - Special flag for probing in progress
54 * Bits which can be modified via irq_set/clear/modify_status_flags()
55 * IRQ_LEVEL - Interrupt is level type. Will be also
56 * updated in the code when the above trigger
57 * bits are modified via irq_set_irq_type()
58 * IRQ_PER_CPU - Mark an interrupt PER_CPU. Will protect
59 * it from affinity setting
60 * IRQ_NOPROBE - Interrupt cannot be probed by autoprobing
61 * IRQ_NOREQUEST - Interrupt cannot be requested via
63 * IRQ_NOTHREAD - Interrupt cannot be threaded
64 * IRQ_NOAUTOEN - Interrupt is not automatically enabled in
66 * IRQ_NO_BALANCING - Interrupt cannot be balanced (affinity set)
67 * IRQ_MOVE_PCNTXT - Interrupt can be migrated from process context
68 * IRQ_NESTED_THREAD - Interrupt nests into another thread
69 * IRQ_PER_CPU_DEVID - Dev_id is a per-cpu variable
70 * IRQ_IS_POLLED - Always polled by another interrupt. Exclude
71 * it from the spurious interrupt detection
72 * mechanism and from core side polling.
73 * IRQ_DISABLE_UNLAZY - Disable lazy irq disable
76 IRQ_TYPE_NONE = 0x00000000,
77 IRQ_TYPE_EDGE_RISING = 0x00000001,
78 IRQ_TYPE_EDGE_FALLING = 0x00000002,
79 IRQ_TYPE_EDGE_BOTH = (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING),
80 IRQ_TYPE_LEVEL_HIGH = 0x00000004,
81 IRQ_TYPE_LEVEL_LOW = 0x00000008,
82 IRQ_TYPE_LEVEL_MASK = (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH),
83 IRQ_TYPE_SENSE_MASK = 0x0000000f,
84 IRQ_TYPE_DEFAULT = IRQ_TYPE_SENSE_MASK,
86 IRQ_TYPE_PROBE = 0x00000010,
89 IRQ_PER_CPU = (1 << 9),
90 IRQ_NOPROBE = (1 << 10),
91 IRQ_NOREQUEST = (1 << 11),
92 IRQ_NOAUTOEN = (1 << 12),
93 IRQ_NO_BALANCING = (1 << 13),
94 IRQ_MOVE_PCNTXT = (1 << 14),
95 IRQ_NESTED_THREAD = (1 << 15),
96 IRQ_NOTHREAD = (1 << 16),
97 IRQ_PER_CPU_DEVID = (1 << 17),
98 IRQ_IS_POLLED = (1 << 18),
99 IRQ_DISABLE_UNLAZY = (1 << 19),
102 #define IRQF_MODIFY_MASK \
103 (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \
104 IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \
105 IRQ_PER_CPU | IRQ_NESTED_THREAD | IRQ_NOTHREAD | IRQ_PER_CPU_DEVID | \
106 IRQ_IS_POLLED | IRQ_DISABLE_UNLAZY)
108 #define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
111 * Return value for chip->irq_set_affinity()
113 * IRQ_SET_MASK_OK - OK, core updates irq_common_data.affinity
114 * IRQ_SET_MASK_NOCPY - OK, chip did update irq_common_data.affinity
115 * IRQ_SET_MASK_OK_DONE - Same as IRQ_SET_MASK_OK for core. Special code to
116 * support stacked irqchips, which indicates skipping
117 * all descendent irqchips.
121 IRQ_SET_MASK_OK_NOCOPY,
122 IRQ_SET_MASK_OK_DONE,
129 * struct irq_common_data - per irq data shared by all irqchips
130 * @state_use_accessors: status information for irq chip functions.
131 * Use accessor functions to deal with it
132 * @node: node index useful for balancing
133 * @handler_data: per-IRQ data for the irq_chip methods
134 * @affinity: IRQ affinity on SMP. If this is an IPI
135 * related irq, then this is the mask of the
136 * CPUs to which an IPI can be sent.
137 * @effective_affinity: The effective IRQ affinity on SMP as some irq
138 * chips do not allow multi CPU destinations.
139 * A subset of @affinity.
140 * @msi_desc: MSI descriptor
141 * @ipi_offset: Offset of first IPI target cpu in @affinity. Optional.
143 struct irq_common_data {
144 unsigned int __private state_use_accessors;
149 struct msi_desc *msi_desc;
150 cpumask_var_t affinity;
151 #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
152 cpumask_var_t effective_affinity;
154 #ifdef CONFIG_GENERIC_IRQ_IPI
155 unsigned int ipi_offset;
160 * struct irq_data - per irq chip data passed down to chip functions
161 * @mask: precomputed bitmask for accessing the chip registers
162 * @irq: interrupt number
163 * @hwirq: hardware interrupt number, local to the interrupt domain
164 * @common: point to data shared by all irqchips
165 * @chip: low level interrupt hardware access
166 * @domain: Interrupt translation domain; responsible for mapping
167 * between hwirq number and linux irq number.
168 * @parent_data: pointer to parent struct irq_data to support hierarchy
170 * @chip_data: platform-specific per-chip private data for the chip
171 * methods, to allow shared chip implementations
177 struct irq_common_data *common;
178 struct irq_chip *chip;
179 struct irq_domain *domain;
180 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
181 struct irq_data *parent_data;
187 * Bit masks for irq_common_data.state_use_accessors
189 * IRQD_TRIGGER_MASK - Mask for the trigger type bits
190 * IRQD_SETAFFINITY_PENDING - Affinity setting is pending
191 * IRQD_ACTIVATED - Interrupt has already been activated
192 * IRQD_NO_BALANCING - Balancing disabled for this IRQ
193 * IRQD_PER_CPU - Interrupt is per cpu
194 * IRQD_AFFINITY_SET - Interrupt affinity was set
195 * IRQD_LEVEL - Interrupt is level triggered
196 * IRQD_WAKEUP_STATE - Interrupt is configured for wakeup
198 * IRQD_MOVE_PCNTXT - Interrupt can be moved in process
200 * IRQD_IRQ_DISABLED - Disabled state of the interrupt
201 * IRQD_IRQ_MASKED - Masked state of the interrupt
202 * IRQD_IRQ_INPROGRESS - In progress state of the interrupt
203 * IRQD_WAKEUP_ARMED - Wakeup mode armed
204 * IRQD_FORWARDED_TO_VCPU - The interrupt is forwarded to a VCPU
205 * IRQD_AFFINITY_MANAGED - Affinity is auto-managed by the kernel
206 * IRQD_IRQ_STARTED - Startup state of the interrupt
207 * IRQD_MANAGED_SHUTDOWN - Interrupt was shutdown due to empty affinity
208 * mask. Applies only to affinity managed irqs.
209 * IRQD_SINGLE_TARGET - IRQ allows only a single affinity target
210 * IRQD_DEFAULT_TRIGGER_SET - Expected trigger already been set
211 * IRQD_CAN_RESERVE - Can use reservation mode
212 * IRQD_MSI_NOMASK_QUIRK - Non-maskable MSI quirk for affinity change
214 * IRQD_HANDLE_ENFORCE_IRQCTX - Enforce that handle_irq_*() is only invoked
215 * from actual interrupt context.
216 * IRQD_AFFINITY_ON_ACTIVATE - Affinity is set on activation. Don't call
217 * irq_chip::irq_set_affinity() when deactivated.
220 IRQD_TRIGGER_MASK = 0xf,
221 IRQD_SETAFFINITY_PENDING = (1 << 8),
222 IRQD_ACTIVATED = (1 << 9),
223 IRQD_NO_BALANCING = (1 << 10),
224 IRQD_PER_CPU = (1 << 11),
225 IRQD_AFFINITY_SET = (1 << 12),
226 IRQD_LEVEL = (1 << 13),
227 IRQD_WAKEUP_STATE = (1 << 14),
228 IRQD_MOVE_PCNTXT = (1 << 15),
229 IRQD_IRQ_DISABLED = (1 << 16),
230 IRQD_IRQ_MASKED = (1 << 17),
231 IRQD_IRQ_INPROGRESS = (1 << 18),
232 IRQD_WAKEUP_ARMED = (1 << 19),
233 IRQD_FORWARDED_TO_VCPU = (1 << 20),
234 IRQD_AFFINITY_MANAGED = (1 << 21),
235 IRQD_IRQ_STARTED = (1 << 22),
236 IRQD_MANAGED_SHUTDOWN = (1 << 23),
237 IRQD_SINGLE_TARGET = (1 << 24),
238 IRQD_DEFAULT_TRIGGER_SET = (1 << 25),
239 IRQD_CAN_RESERVE = (1 << 26),
240 IRQD_MSI_NOMASK_QUIRK = (1 << 27),
241 IRQD_HANDLE_ENFORCE_IRQCTX = (1 << 28),
242 IRQD_AFFINITY_ON_ACTIVATE = (1 << 29),
245 #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
247 static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
249 return __irqd_to_state(d) & IRQD_SETAFFINITY_PENDING;
252 static inline bool irqd_is_per_cpu(struct irq_data *d)
254 return __irqd_to_state(d) & IRQD_PER_CPU;
257 static inline bool irqd_can_balance(struct irq_data *d)
259 return !(__irqd_to_state(d) & (IRQD_PER_CPU | IRQD_NO_BALANCING));
262 static inline bool irqd_affinity_was_set(struct irq_data *d)
264 return __irqd_to_state(d) & IRQD_AFFINITY_SET;
267 static inline void irqd_mark_affinity_was_set(struct irq_data *d)
269 __irqd_to_state(d) |= IRQD_AFFINITY_SET;
272 static inline bool irqd_trigger_type_was_set(struct irq_data *d)
274 return __irqd_to_state(d) & IRQD_DEFAULT_TRIGGER_SET;
277 static inline u32 irqd_get_trigger_type(struct irq_data *d)
279 return __irqd_to_state(d) & IRQD_TRIGGER_MASK;
283 * Must only be called inside irq_chip.irq_set_type() functions or
284 * from the DT/ACPI setup code.
286 static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)
288 __irqd_to_state(d) &= ~IRQD_TRIGGER_MASK;
289 __irqd_to_state(d) |= type & IRQD_TRIGGER_MASK;
290 __irqd_to_state(d) |= IRQD_DEFAULT_TRIGGER_SET;
293 static inline bool irqd_is_level_type(struct irq_data *d)
295 return __irqd_to_state(d) & IRQD_LEVEL;
299 * Must only be called of irqchip.irq_set_affinity() or low level
300 * hieararchy domain allocation functions.
302 static inline void irqd_set_single_target(struct irq_data *d)
304 __irqd_to_state(d) |= IRQD_SINGLE_TARGET;
307 static inline bool irqd_is_single_target(struct irq_data *d)
309 return __irqd_to_state(d) & IRQD_SINGLE_TARGET;
312 static inline void irqd_set_handle_enforce_irqctx(struct irq_data *d)
314 __irqd_to_state(d) |= IRQD_HANDLE_ENFORCE_IRQCTX;
317 static inline bool irqd_is_handle_enforce_irqctx(struct irq_data *d)
319 return __irqd_to_state(d) & IRQD_HANDLE_ENFORCE_IRQCTX;
322 static inline bool irqd_is_wakeup_set(struct irq_data *d)
324 return __irqd_to_state(d) & IRQD_WAKEUP_STATE;
327 static inline bool irqd_can_move_in_process_context(struct irq_data *d)
329 return __irqd_to_state(d) & IRQD_MOVE_PCNTXT;
332 static inline bool irqd_irq_disabled(struct irq_data *d)
334 return __irqd_to_state(d) & IRQD_IRQ_DISABLED;
337 static inline bool irqd_irq_masked(struct irq_data *d)
339 return __irqd_to_state(d) & IRQD_IRQ_MASKED;
342 static inline bool irqd_irq_inprogress(struct irq_data *d)
344 return __irqd_to_state(d) & IRQD_IRQ_INPROGRESS;
347 static inline bool irqd_is_wakeup_armed(struct irq_data *d)
349 return __irqd_to_state(d) & IRQD_WAKEUP_ARMED;
352 static inline bool irqd_is_forwarded_to_vcpu(struct irq_data *d)
354 return __irqd_to_state(d) & IRQD_FORWARDED_TO_VCPU;
357 static inline void irqd_set_forwarded_to_vcpu(struct irq_data *d)
359 __irqd_to_state(d) |= IRQD_FORWARDED_TO_VCPU;
362 static inline void irqd_clr_forwarded_to_vcpu(struct irq_data *d)
364 __irqd_to_state(d) &= ~IRQD_FORWARDED_TO_VCPU;
367 static inline bool irqd_affinity_is_managed(struct irq_data *d)
369 return __irqd_to_state(d) & IRQD_AFFINITY_MANAGED;
372 static inline bool irqd_is_activated(struct irq_data *d)
374 return __irqd_to_state(d) & IRQD_ACTIVATED;
377 static inline void irqd_set_activated(struct irq_data *d)
379 __irqd_to_state(d) |= IRQD_ACTIVATED;
382 static inline void irqd_clr_activated(struct irq_data *d)
384 __irqd_to_state(d) &= ~IRQD_ACTIVATED;
387 static inline bool irqd_is_started(struct irq_data *d)
389 return __irqd_to_state(d) & IRQD_IRQ_STARTED;
392 static inline bool irqd_is_managed_and_shutdown(struct irq_data *d)
394 return __irqd_to_state(d) & IRQD_MANAGED_SHUTDOWN;
397 static inline void irqd_set_can_reserve(struct irq_data *d)
399 __irqd_to_state(d) |= IRQD_CAN_RESERVE;
402 static inline void irqd_clr_can_reserve(struct irq_data *d)
404 __irqd_to_state(d) &= ~IRQD_CAN_RESERVE;
407 static inline bool irqd_can_reserve(struct irq_data *d)
409 return __irqd_to_state(d) & IRQD_CAN_RESERVE;
412 static inline void irqd_set_msi_nomask_quirk(struct irq_data *d)
414 __irqd_to_state(d) |= IRQD_MSI_NOMASK_QUIRK;
417 static inline void irqd_clr_msi_nomask_quirk(struct irq_data *d)
419 __irqd_to_state(d) &= ~IRQD_MSI_NOMASK_QUIRK;
422 static inline bool irqd_msi_nomask_quirk(struct irq_data *d)
424 return __irqd_to_state(d) & IRQD_MSI_NOMASK_QUIRK;
427 static inline void irqd_set_affinity_on_activate(struct irq_data *d)
429 __irqd_to_state(d) |= IRQD_AFFINITY_ON_ACTIVATE;
432 static inline bool irqd_affinity_on_activate(struct irq_data *d)
434 return __irqd_to_state(d) & IRQD_AFFINITY_ON_ACTIVATE;
437 #undef __irqd_to_state
439 static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
445 * struct irq_chip - hardware interrupt chip descriptor
447 * @parent_device: pointer to parent device for irqchip
448 * @name: name for /proc/interrupts
449 * @irq_startup: start up the interrupt (defaults to ->enable if NULL)
450 * @irq_shutdown: shut down the interrupt (defaults to ->disable if NULL)
451 * @irq_enable: enable the interrupt (defaults to chip->unmask if NULL)
452 * @irq_disable: disable the interrupt
453 * @irq_ack: start of a new interrupt
454 * @irq_mask: mask an interrupt source
455 * @irq_mask_ack: ack and mask an interrupt source
456 * @irq_unmask: unmask an interrupt source
457 * @irq_eoi: end of interrupt
458 * @irq_set_affinity: Set the CPU affinity on SMP machines. If the force
459 * argument is true, it tells the driver to
460 * unconditionally apply the affinity setting. Sanity
461 * checks against the supplied affinity mask are not
462 * required. This is used for CPU hotplug where the
463 * target CPU is not yet set in the cpu_online_mask.
464 * @irq_retrigger: resend an IRQ to the CPU
465 * @irq_set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
466 * @irq_set_wake: enable/disable power-management wake-on of an IRQ
467 * @irq_bus_lock: function to lock access to slow bus (i2c) chips
468 * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
469 * @irq_cpu_online: configure an interrupt source for a secondary CPU
470 * @irq_cpu_offline: un-configure an interrupt source for a secondary CPU
471 * @irq_suspend: function called from core code on suspend once per
472 * chip, when one or more interrupts are installed
473 * @irq_resume: function called from core code on resume once per chip,
474 * when one ore more interrupts are installed
475 * @irq_pm_shutdown: function called from core code on shutdown once per chip
476 * @irq_calc_mask: Optional function to set irq_data.mask for special cases
477 * @irq_print_chip: optional to print special chip info in show_interrupts
478 * @irq_request_resources: optional to request resources before calling
479 * any other callback related to this irq
480 * @irq_release_resources: optional to release resources acquired with
481 * irq_request_resources
482 * @irq_compose_msi_msg: optional to compose message content for MSI
483 * @irq_write_msi_msg: optional to write message content for MSI
484 * @irq_get_irqchip_state: return the internal state of an interrupt
485 * @irq_set_irqchip_state: set the internal state of a interrupt
486 * @irq_set_vcpu_affinity: optional to target a vCPU in a virtual machine
487 * @ipi_send_single: send a single IPI to destination cpus
488 * @ipi_send_mask: send an IPI to destination cpus in cpumask
489 * @irq_nmi_setup: function called from core code before enabling an NMI
490 * @irq_nmi_teardown: function called from core code after disabling an NMI
491 * @flags: chip specific flags
494 struct device *parent_device;
496 unsigned int (*irq_startup)(struct irq_data *data);
497 void (*irq_shutdown)(struct irq_data *data);
498 void (*irq_enable)(struct irq_data *data);
499 void (*irq_disable)(struct irq_data *data);
501 void (*irq_ack)(struct irq_data *data);
502 void (*irq_mask)(struct irq_data *data);
503 void (*irq_mask_ack)(struct irq_data *data);
504 void (*irq_unmask)(struct irq_data *data);
505 void (*irq_eoi)(struct irq_data *data);
507 int (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force);
508 int (*irq_retrigger)(struct irq_data *data);
509 int (*irq_set_type)(struct irq_data *data, unsigned int flow_type);
510 int (*irq_set_wake)(struct irq_data *data, unsigned int on);
512 void (*irq_bus_lock)(struct irq_data *data);
513 void (*irq_bus_sync_unlock)(struct irq_data *data);
515 void (*irq_cpu_online)(struct irq_data *data);
516 void (*irq_cpu_offline)(struct irq_data *data);
518 void (*irq_suspend)(struct irq_data *data);
519 void (*irq_resume)(struct irq_data *data);
520 void (*irq_pm_shutdown)(struct irq_data *data);
522 void (*irq_calc_mask)(struct irq_data *data);
524 void (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
525 int (*irq_request_resources)(struct irq_data *data);
526 void (*irq_release_resources)(struct irq_data *data);
528 void (*irq_compose_msi_msg)(struct irq_data *data, struct msi_msg *msg);
529 void (*irq_write_msi_msg)(struct irq_data *data, struct msi_msg *msg);
531 int (*irq_get_irqchip_state)(struct irq_data *data, enum irqchip_irq_state which, bool *state);
532 int (*irq_set_irqchip_state)(struct irq_data *data, enum irqchip_irq_state which, bool state);
534 int (*irq_set_vcpu_affinity)(struct irq_data *data, void *vcpu_info);
536 void (*ipi_send_single)(struct irq_data *data, unsigned int cpu);
537 void (*ipi_send_mask)(struct irq_data *data, const struct cpumask *dest);
539 int (*irq_nmi_setup)(struct irq_data *data);
540 void (*irq_nmi_teardown)(struct irq_data *data);
546 * irq_chip specific flags
548 * IRQCHIP_SET_TYPE_MASKED: Mask before calling chip.irq_set_type()
549 * IRQCHIP_EOI_IF_HANDLED: Only issue irq_eoi() when irq was handled
550 * IRQCHIP_MASK_ON_SUSPEND: Mask non wake irqs in the suspend path
551 * IRQCHIP_ONOFFLINE_ENABLED: Only call irq_on/off_line callbacks
553 * IRQCHIP_SKIP_SET_WAKE: Skip chip.irq_set_wake(), for this irq chip
554 * IRQCHIP_ONESHOT_SAFE: One shot does not require mask/unmask
555 * IRQCHIP_EOI_THREADED: Chip requires eoi() on unmask in threaded mode
556 * IRQCHIP_SUPPORTS_LEVEL_MSI Chip can provide two doorbells for Level MSIs
557 * IRQCHIP_SUPPORTS_NMI: Chip can deliver NMIs, only for root irqchips
560 IRQCHIP_SET_TYPE_MASKED = (1 << 0),
561 IRQCHIP_EOI_IF_HANDLED = (1 << 1),
562 IRQCHIP_MASK_ON_SUSPEND = (1 << 2),
563 IRQCHIP_ONOFFLINE_ENABLED = (1 << 3),
564 IRQCHIP_SKIP_SET_WAKE = (1 << 4),
565 IRQCHIP_ONESHOT_SAFE = (1 << 5),
566 IRQCHIP_EOI_THREADED = (1 << 6),
567 IRQCHIP_SUPPORTS_LEVEL_MSI = (1 << 7),
568 IRQCHIP_SUPPORTS_NMI = (1 << 8),
571 #include <linux/irqdesc.h>
574 * Pick up the arch-dependent methods:
576 #include <asm/hw_irq.h>
578 #ifndef NR_IRQS_LEGACY
579 # define NR_IRQS_LEGACY 0
582 #ifndef ARCH_IRQ_INIT_FLAGS
583 # define ARCH_IRQ_INIT_FLAGS 0
586 #define IRQ_DEFAULT_INIT_FLAGS ARCH_IRQ_INIT_FLAGS
589 extern int setup_percpu_irq(unsigned int irq, struct irqaction *new);
590 extern void remove_percpu_irq(unsigned int irq, struct irqaction *act);
592 extern void irq_cpu_online(void);
593 extern void irq_cpu_offline(void);
594 extern int irq_set_affinity_locked(struct irq_data *data,
595 const struct cpumask *cpumask, bool force);
596 extern int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info);
598 #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_IRQ_MIGRATION)
599 extern void irq_migrate_all_off_this_cpu(void);
600 extern int irq_affinity_online_cpu(unsigned int cpu);
602 # define irq_affinity_online_cpu NULL
605 #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
606 void __irq_move_irq(struct irq_data *data);
607 static inline void irq_move_irq(struct irq_data *data)
609 if (unlikely(irqd_is_setaffinity_pending(data)))
610 __irq_move_irq(data);
612 void irq_move_masked_irq(struct irq_data *data);
613 void irq_force_complete_move(struct irq_desc *desc);
615 static inline void irq_move_irq(struct irq_data *data) { }
616 static inline void irq_move_masked_irq(struct irq_data *data) { }
617 static inline void irq_force_complete_move(struct irq_desc *desc) { }
620 extern int no_irq_affinity;
622 #ifdef CONFIG_HARDIRQS_SW_RESEND
623 int irq_set_parent(int irq, int parent_irq);
625 static inline int irq_set_parent(int irq, int parent_irq)
632 * Built-in IRQ handlers for various IRQ types,
633 * callable via desc->handle_irq()
635 extern void handle_level_irq(struct irq_desc *desc);
636 extern void handle_fasteoi_irq(struct irq_desc *desc);
637 extern void handle_edge_irq(struct irq_desc *desc);
638 extern void handle_edge_eoi_irq(struct irq_desc *desc);
639 extern void handle_simple_irq(struct irq_desc *desc);
640 extern void handle_untracked_irq(struct irq_desc *desc);
641 extern void handle_percpu_irq(struct irq_desc *desc);
642 extern void handle_percpu_devid_irq(struct irq_desc *desc);
643 extern void handle_bad_irq(struct irq_desc *desc);
644 extern void handle_nested_irq(unsigned int irq);
646 extern void handle_fasteoi_nmi(struct irq_desc *desc);
647 extern void handle_percpu_devid_fasteoi_nmi(struct irq_desc *desc);
649 extern int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg);
650 extern int irq_chip_pm_get(struct irq_data *data);
651 extern int irq_chip_pm_put(struct irq_data *data);
652 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
653 extern void handle_fasteoi_ack_irq(struct irq_desc *desc);
654 extern void handle_fasteoi_mask_irq(struct irq_desc *desc);
655 extern int irq_chip_set_parent_state(struct irq_data *data,
656 enum irqchip_irq_state which,
658 extern int irq_chip_get_parent_state(struct irq_data *data,
659 enum irqchip_irq_state which,
661 extern void irq_chip_enable_parent(struct irq_data *data);
662 extern void irq_chip_disable_parent(struct irq_data *data);
663 extern void irq_chip_ack_parent(struct irq_data *data);
664 extern int irq_chip_retrigger_hierarchy(struct irq_data *data);
665 extern void irq_chip_mask_parent(struct irq_data *data);
666 extern void irq_chip_mask_ack_parent(struct irq_data *data);
667 extern void irq_chip_unmask_parent(struct irq_data *data);
668 extern void irq_chip_eoi_parent(struct irq_data *data);
669 extern int irq_chip_set_affinity_parent(struct irq_data *data,
670 const struct cpumask *dest,
672 extern int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on);
673 extern int irq_chip_set_vcpu_affinity_parent(struct irq_data *data,
675 extern int irq_chip_set_type_parent(struct irq_data *data, unsigned int type);
676 extern int irq_chip_request_resources_parent(struct irq_data *data);
677 extern void irq_chip_release_resources_parent(struct irq_data *data);
680 /* Handling of unhandled and spurious interrupts: */
681 extern void note_interrupt(struct irq_desc *desc, irqreturn_t action_ret);
684 /* Enable/disable irq debugging output: */
685 extern int noirqdebug_setup(char *str);
687 /* Checks whether the interrupt can be requested by request_irq(): */
688 extern int can_request_irq(unsigned int irq, unsigned long irqflags);
690 /* Dummy irq-chip implementations: */
691 extern struct irq_chip no_irq_chip;
692 extern struct irq_chip dummy_irq_chip;
695 irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
696 irq_flow_handler_t handle, const char *name);
698 static inline void irq_set_chip_and_handler(unsigned int irq, struct irq_chip *chip,
699 irq_flow_handler_t handle)
701 irq_set_chip_and_handler_name(irq, chip, handle, NULL);
704 extern int irq_set_percpu_devid(unsigned int irq);
705 extern int irq_set_percpu_devid_partition(unsigned int irq,
706 const struct cpumask *affinity);
707 extern int irq_get_percpu_devid_partition(unsigned int irq,
708 struct cpumask *affinity);
711 __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
715 irq_set_handler(unsigned int irq, irq_flow_handler_t handle)
717 __irq_set_handler(irq, handle, 0, NULL);
721 * Set a highlevel chained flow handler for a given IRQ.
722 * (a chained handler is automatically enabled and set to
723 * IRQ_NOREQUEST, IRQ_NOPROBE, and IRQ_NOTHREAD)
726 irq_set_chained_handler(unsigned int irq, irq_flow_handler_t handle)
728 __irq_set_handler(irq, handle, 1, NULL);
732 * Set a highlevel chained flow handler and its data for a given IRQ.
733 * (a chained handler is automatically enabled and set to
734 * IRQ_NOREQUEST, IRQ_NOPROBE, and IRQ_NOTHREAD)
737 irq_set_chained_handler_and_data(unsigned int irq, irq_flow_handler_t handle,
740 void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set);
742 static inline void irq_set_status_flags(unsigned int irq, unsigned long set)
744 irq_modify_status(irq, 0, set);
747 static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr)
749 irq_modify_status(irq, clr, 0);
752 static inline void irq_set_noprobe(unsigned int irq)
754 irq_modify_status(irq, 0, IRQ_NOPROBE);
757 static inline void irq_set_probe(unsigned int irq)
759 irq_modify_status(irq, IRQ_NOPROBE, 0);
762 static inline void irq_set_nothread(unsigned int irq)
764 irq_modify_status(irq, 0, IRQ_NOTHREAD);
767 static inline void irq_set_thread(unsigned int irq)
769 irq_modify_status(irq, IRQ_NOTHREAD, 0);
772 static inline void irq_set_nested_thread(unsigned int irq, bool nest)
775 irq_set_status_flags(irq, IRQ_NESTED_THREAD);
777 irq_clear_status_flags(irq, IRQ_NESTED_THREAD);
780 static inline void irq_set_percpu_devid_flags(unsigned int irq)
782 irq_set_status_flags(irq,
783 IRQ_NOAUTOEN | IRQ_PER_CPU | IRQ_NOTHREAD |
784 IRQ_NOPROBE | IRQ_PER_CPU_DEVID);
787 /* Set/get chip/data for an IRQ: */
788 extern int irq_set_chip(unsigned int irq, struct irq_chip *chip);
789 extern int irq_set_handler_data(unsigned int irq, void *data);
790 extern int irq_set_chip_data(unsigned int irq, void *data);
791 extern int irq_set_irq_type(unsigned int irq, unsigned int type);
792 extern int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry);
793 extern int irq_set_msi_desc_off(unsigned int irq_base, unsigned int irq_offset,
794 struct msi_desc *entry);
795 extern struct irq_data *irq_get_irq_data(unsigned int irq);
797 static inline struct irq_chip *irq_get_chip(unsigned int irq)
799 struct irq_data *d = irq_get_irq_data(irq);
800 return d ? d->chip : NULL;
803 static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d)
808 static inline void *irq_get_chip_data(unsigned int irq)
810 struct irq_data *d = irq_get_irq_data(irq);
811 return d ? d->chip_data : NULL;
814 static inline void *irq_data_get_irq_chip_data(struct irq_data *d)
819 static inline void *irq_get_handler_data(unsigned int irq)
821 struct irq_data *d = irq_get_irq_data(irq);
822 return d ? d->common->handler_data : NULL;
825 static inline void *irq_data_get_irq_handler_data(struct irq_data *d)
827 return d->common->handler_data;
830 static inline struct msi_desc *irq_get_msi_desc(unsigned int irq)
832 struct irq_data *d = irq_get_irq_data(irq);
833 return d ? d->common->msi_desc : NULL;
836 static inline struct msi_desc *irq_data_get_msi_desc(struct irq_data *d)
838 return d->common->msi_desc;
841 static inline u32 irq_get_trigger_type(unsigned int irq)
843 struct irq_data *d = irq_get_irq_data(irq);
844 return d ? irqd_get_trigger_type(d) : 0;
847 static inline int irq_common_data_get_node(struct irq_common_data *d)
856 static inline int irq_data_get_node(struct irq_data *d)
858 return irq_common_data_get_node(d->common);
861 static inline struct cpumask *irq_get_affinity_mask(int irq)
863 struct irq_data *d = irq_get_irq_data(irq);
865 return d ? d->common->affinity : NULL;
868 static inline struct cpumask *irq_data_get_affinity_mask(struct irq_data *d)
870 return d->common->affinity;
873 #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
875 struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d)
877 return d->common->effective_affinity;
879 static inline void irq_data_update_effective_affinity(struct irq_data *d,
880 const struct cpumask *m)
882 cpumask_copy(d->common->effective_affinity, m);
885 static inline void irq_data_update_effective_affinity(struct irq_data *d,
886 const struct cpumask *m)
890 struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d)
892 return d->common->affinity;
896 unsigned int arch_dynirq_lower_bound(unsigned int from);
898 int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
899 struct module *owner,
900 const struct irq_affinity_desc *affinity);
902 int __devm_irq_alloc_descs(struct device *dev, int irq, unsigned int from,
903 unsigned int cnt, int node, struct module *owner,
904 const struct irq_affinity_desc *affinity);
906 /* use macros to avoid needing export.h for THIS_MODULE */
907 #define irq_alloc_descs(irq, from, cnt, node) \
908 __irq_alloc_descs(irq, from, cnt, node, THIS_MODULE, NULL)
910 #define irq_alloc_desc(node) \
911 irq_alloc_descs(-1, 0, 1, node)
913 #define irq_alloc_desc_at(at, node) \
914 irq_alloc_descs(at, at, 1, node)
916 #define irq_alloc_desc_from(from, node) \
917 irq_alloc_descs(-1, from, 1, node)
919 #define irq_alloc_descs_from(from, cnt, node) \
920 irq_alloc_descs(-1, from, cnt, node)
922 #define devm_irq_alloc_descs(dev, irq, from, cnt, node) \
923 __devm_irq_alloc_descs(dev, irq, from, cnt, node, THIS_MODULE, NULL)
925 #define devm_irq_alloc_desc(dev, node) \
926 devm_irq_alloc_descs(dev, -1, 0, 1, node)
928 #define devm_irq_alloc_desc_at(dev, at, node) \
929 devm_irq_alloc_descs(dev, at, at, 1, node)
931 #define devm_irq_alloc_desc_from(dev, from, node) \
932 devm_irq_alloc_descs(dev, -1, from, 1, node)
934 #define devm_irq_alloc_descs_from(dev, from, cnt, node) \
935 devm_irq_alloc_descs(dev, -1, from, cnt, node)
937 void irq_free_descs(unsigned int irq, unsigned int cnt);
938 static inline void irq_free_desc(unsigned int irq)
940 irq_free_descs(irq, 1);
943 #ifdef CONFIG_GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
944 unsigned int irq_alloc_hwirqs(int cnt, int node);
945 static inline unsigned int irq_alloc_hwirq(int node)
947 return irq_alloc_hwirqs(1, node);
949 void irq_free_hwirqs(unsigned int from, int cnt);
950 static inline void irq_free_hwirq(unsigned int irq)
952 return irq_free_hwirqs(irq, 1);
954 int arch_setup_hwirq(unsigned int irq, int node);
955 void arch_teardown_hwirq(unsigned int irq);
958 #ifdef CONFIG_GENERIC_IRQ_LEGACY
959 void irq_init_desc(unsigned int irq);
963 * struct irq_chip_regs - register offsets for struct irq_gci
964 * @enable: Enable register offset to reg_base
965 * @disable: Disable register offset to reg_base
966 * @mask: Mask register offset to reg_base
967 * @ack: Ack register offset to reg_base
968 * @eoi: Eoi register offset to reg_base
969 * @type: Type configuration register offset to reg_base
970 * @polarity: Polarity configuration register offset to reg_base
972 struct irq_chip_regs {
973 unsigned long enable;
974 unsigned long disable;
979 unsigned long polarity;
983 * struct irq_chip_type - Generic interrupt chip instance for a flow type
984 * @chip: The real interrupt chip which provides the callbacks
985 * @regs: Register offsets for this chip
986 * @handler: Flow handler associated with this chip
987 * @type: Chip can handle these flow types
988 * @mask_cache_priv: Cached mask register private to the chip type
989 * @mask_cache: Pointer to cached mask register
991 * A irq_generic_chip can have several instances of irq_chip_type when
992 * it requires different functions and register offsets for different
995 struct irq_chip_type {
996 struct irq_chip chip;
997 struct irq_chip_regs regs;
998 irq_flow_handler_t handler;
1000 u32 mask_cache_priv;
1005 * struct irq_chip_generic - Generic irq chip data structure
1006 * @lock: Lock to protect register and cache data access
1007 * @reg_base: Register base address (virtual)
1008 * @reg_readl: Alternate I/O accessor (defaults to readl if NULL)
1009 * @reg_writel: Alternate I/O accessor (defaults to writel if NULL)
1010 * @suspend: Function called from core code on suspend once per
1011 * chip; can be useful instead of irq_chip::suspend to
1012 * handle chip details even when no interrupts are in use
1013 * @resume: Function called from core code on resume once per chip;
1014 * can be useful instead of irq_chip::suspend to handle
1015 * chip details even when no interrupts are in use
1016 * @irq_base: Interrupt base nr for this chip
1017 * @irq_cnt: Number of interrupts handled by this chip
1018 * @mask_cache: Cached mask register shared between all chip types
1019 * @type_cache: Cached type register
1020 * @polarity_cache: Cached polarity register
1021 * @wake_enabled: Interrupt can wakeup from suspend
1022 * @wake_active: Interrupt is marked as an wakeup from suspend source
1023 * @num_ct: Number of available irq_chip_type instances (usually 1)
1024 * @private: Private data for non generic chip callbacks
1025 * @installed: bitfield to denote installed interrupts
1026 * @unused: bitfield to denote unused interrupts
1027 * @domain: irq domain pointer
1028 * @list: List head for keeping track of instances
1029 * @chip_types: Array of interrupt irq_chip_types
1031 * Note, that irq_chip_generic can have multiple irq_chip_type
1032 * implementations which can be associated to a particular irq line of
1033 * an irq_chip_generic instance. That allows to share and protect
1034 * state in an irq_chip_generic instance when we need to implement
1035 * different flow mechanisms (level/edge) for it.
1037 struct irq_chip_generic {
1038 raw_spinlock_t lock;
1039 void __iomem *reg_base;
1040 u32 (*reg_readl)(void __iomem *addr);
1041 void (*reg_writel)(u32 val, void __iomem *addr);
1042 void (*suspend)(struct irq_chip_generic *gc);
1043 void (*resume)(struct irq_chip_generic *gc);
1044 unsigned int irq_base;
1045 unsigned int irq_cnt;
1051 unsigned int num_ct;
1053 unsigned long installed;
1054 unsigned long unused;
1055 struct irq_domain *domain;
1056 struct list_head list;
1057 struct irq_chip_type chip_types[];
1061 * enum irq_gc_flags - Initialization flags for generic irq chips
1062 * @IRQ_GC_INIT_MASK_CACHE: Initialize the mask_cache by reading mask reg
1063 * @IRQ_GC_INIT_NESTED_LOCK: Set the lock class of the irqs to nested for
1064 * irq chips which need to call irq_set_wake() on
1065 * the parent irq. Usually GPIO implementations
1066 * @IRQ_GC_MASK_CACHE_PER_TYPE: Mask cache is chip type private
1067 * @IRQ_GC_NO_MASK: Do not calculate irq_data->mask
1068 * @IRQ_GC_BE_IO: Use big-endian register accesses (default: LE)
1071 IRQ_GC_INIT_MASK_CACHE = 1 << 0,
1072 IRQ_GC_INIT_NESTED_LOCK = 1 << 1,
1073 IRQ_GC_MASK_CACHE_PER_TYPE = 1 << 2,
1074 IRQ_GC_NO_MASK = 1 << 3,
1075 IRQ_GC_BE_IO = 1 << 4,
1079 * struct irq_domain_chip_generic - Generic irq chip data structure for irq domains
1080 * @irqs_per_chip: Number of interrupts per chip
1081 * @num_chips: Number of chips
1082 * @irq_flags_to_set: IRQ* flags to set on irq setup
1083 * @irq_flags_to_clear: IRQ* flags to clear on irq setup
1084 * @gc_flags: Generic chip specific setup flags
1085 * @gc: Array of pointers to generic interrupt chips
1087 struct irq_domain_chip_generic {
1088 unsigned int irqs_per_chip;
1089 unsigned int num_chips;
1090 unsigned int irq_flags_to_clear;
1091 unsigned int irq_flags_to_set;
1092 enum irq_gc_flags gc_flags;
1093 struct irq_chip_generic *gc[];
1096 /* Generic chip callback functions */
1097 void irq_gc_noop(struct irq_data *d);
1098 void irq_gc_mask_disable_reg(struct irq_data *d);
1099 void irq_gc_mask_set_bit(struct irq_data *d);
1100 void irq_gc_mask_clr_bit(struct irq_data *d);
1101 void irq_gc_unmask_enable_reg(struct irq_data *d);
1102 void irq_gc_ack_set_bit(struct irq_data *d);
1103 void irq_gc_ack_clr_bit(struct irq_data *d);
1104 void irq_gc_mask_disable_and_ack_set(struct irq_data *d);
1105 void irq_gc_eoi(struct irq_data *d);
1106 int irq_gc_set_wake(struct irq_data *d, unsigned int on);
1108 /* Setup functions for irq_chip_generic */
1109 int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
1110 irq_hw_number_t hw_irq);
1111 struct irq_chip_generic *
1112 irq_alloc_generic_chip(const char *name, int nr_ct, unsigned int irq_base,
1113 void __iomem *reg_base, irq_flow_handler_t handler);
1114 void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk,
1115 enum irq_gc_flags flags, unsigned int clr,
1117 int irq_setup_alt_chip(struct irq_data *d, unsigned int type);
1118 void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk,
1119 unsigned int clr, unsigned int set);
1121 struct irq_chip_generic *
1122 devm_irq_alloc_generic_chip(struct device *dev, const char *name, int num_ct,
1123 unsigned int irq_base, void __iomem *reg_base,
1124 irq_flow_handler_t handler);
1125 int devm_irq_setup_generic_chip(struct device *dev, struct irq_chip_generic *gc,
1126 u32 msk, enum irq_gc_flags flags,
1127 unsigned int clr, unsigned int set);
1129 struct irq_chip_generic *irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq);
1131 int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
1132 int num_ct, const char *name,
1133 irq_flow_handler_t handler,
1134 unsigned int clr, unsigned int set,
1135 enum irq_gc_flags flags);
1137 #define irq_alloc_domain_generic_chips(d, irqs_per_chip, num_ct, name, \
1138 handler, clr, set, flags) \
1140 MAYBE_BUILD_BUG_ON(irqs_per_chip > 32); \
1141 __irq_alloc_domain_generic_chips(d, irqs_per_chip, num_ct, name,\
1142 handler, clr, set, flags); \
1145 static inline void irq_free_generic_chip(struct irq_chip_generic *gc)
1150 static inline void irq_destroy_generic_chip(struct irq_chip_generic *gc,
1151 u32 msk, unsigned int clr,
1154 irq_remove_generic_chip(gc, msk, clr, set);
1155 irq_free_generic_chip(gc);
1158 static inline struct irq_chip_type *irq_data_get_chip_type(struct irq_data *d)
1160 return container_of(d->chip, struct irq_chip_type, chip);
1163 #define IRQ_MSK(n) (u32)((n) < 32 ? ((1 << (n)) - 1) : UINT_MAX)
1166 static inline void irq_gc_lock(struct irq_chip_generic *gc)
1168 raw_spin_lock(&gc->lock);
1171 static inline void irq_gc_unlock(struct irq_chip_generic *gc)
1173 raw_spin_unlock(&gc->lock);
1176 static inline void irq_gc_lock(struct irq_chip_generic *gc) { }
1177 static inline void irq_gc_unlock(struct irq_chip_generic *gc) { }
1181 * The irqsave variants are for usage in non interrupt code. Do not use
1182 * them in irq_chip callbacks. Use irq_gc_lock() instead.
1184 #define irq_gc_lock_irqsave(gc, flags) \
1185 raw_spin_lock_irqsave(&(gc)->lock, flags)
1187 #define irq_gc_unlock_irqrestore(gc, flags) \
1188 raw_spin_unlock_irqrestore(&(gc)->lock, flags)
1190 static inline void irq_reg_writel(struct irq_chip_generic *gc,
1191 u32 val, int reg_offset)
1194 gc->reg_writel(val, gc->reg_base + reg_offset);
1196 writel(val, gc->reg_base + reg_offset);
1199 static inline u32 irq_reg_readl(struct irq_chip_generic *gc,
1203 return gc->reg_readl(gc->reg_base + reg_offset);
1205 return readl(gc->reg_base + reg_offset);
1209 struct irq_matrix *irq_alloc_matrix(unsigned int matrix_bits,
1210 unsigned int alloc_start,
1211 unsigned int alloc_end);
1212 void irq_matrix_online(struct irq_matrix *m);
1213 void irq_matrix_offline(struct irq_matrix *m);
1214 void irq_matrix_assign_system(struct irq_matrix *m, unsigned int bit, bool replace);
1215 int irq_matrix_reserve_managed(struct irq_matrix *m, const struct cpumask *msk);
1216 void irq_matrix_remove_managed(struct irq_matrix *m, const struct cpumask *msk);
1217 int irq_matrix_alloc_managed(struct irq_matrix *m, const struct cpumask *msk,
1218 unsigned int *mapped_cpu);
1219 void irq_matrix_reserve(struct irq_matrix *m);
1220 void irq_matrix_remove_reserved(struct irq_matrix *m);
1221 int irq_matrix_alloc(struct irq_matrix *m, const struct cpumask *msk,
1222 bool reserved, unsigned int *mapped_cpu);
1223 void irq_matrix_free(struct irq_matrix *m, unsigned int cpu,
1224 unsigned int bit, bool managed);
1225 void irq_matrix_assign(struct irq_matrix *m, unsigned int bit);
1226 unsigned int irq_matrix_available(struct irq_matrix *m, bool cpudown);
1227 unsigned int irq_matrix_allocated(struct irq_matrix *m);
1228 unsigned int irq_matrix_reserved(struct irq_matrix *m);
1229 void irq_matrix_debug_show(struct seq_file *sf, struct irq_matrix *m, int ind);
1231 /* Contrary to Linux irqs, for hardware irqs the irq number 0 is valid */
1232 #define INVALID_HWIRQ (~0UL)
1233 irq_hw_number_t ipi_get_hwirq(unsigned int irq, unsigned int cpu);
1234 int __ipi_send_single(struct irq_desc *desc, unsigned int cpu);
1235 int __ipi_send_mask(struct irq_desc *desc, const struct cpumask *dest);
1236 int ipi_send_single(unsigned int virq, unsigned int cpu);
1237 int ipi_send_mask(unsigned int virq, const struct cpumask *dest);
1239 #ifdef CONFIG_GENERIC_IRQ_MULTI_HANDLER
1241 * Registers a generic IRQ handling function as the top-level IRQ handler in
1242 * the system, which is generally the first C code called from an assembly
1243 * architecture-specific interrupt handler.
1245 * Returns 0 on success, or -EBUSY if an IRQ handler has already been
1248 int __init set_handle_irq(void (*handle_irq)(struct pt_regs *));
1251 * Allows interrupt handlers to find the irqchip that's been registered as the
1252 * top-level IRQ handler.
1254 extern void (*handle_arch_irq)(struct pt_regs *) __ro_after_init;
1257 #endif /* _LINUX_IRQ_H */