/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_IRQ_H
#define _LINUX_IRQ_H
/*
* Please do not include this file in generic code . There is currently
* no requirement for any architecture to implement anything held
* within this file .
*
* Thanks . - - rmk
*/
#include <linux/cache.h>
#include <linux/spinlock.h>
#include <linux/cpumask.h>
#include <linux/irqhandler.h>
#include <linux/irqreturn.h>
#include <linux/irqnr.h>
#include <linux/topology.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <asm /irq.h>
#include <asm /ptrace.h>
#include <asm /irq_regs.h>
struct seq_file;
struct module;
struct msi_msg;
struct irq_affinity_desc;
enum irqchip_irq_state;
/*
* IRQ line status .
*
* Bits 0 - 7 are the same as the IRQF_ * bits in linux / interrupt . h
*
* IRQ_TYPE_NONE - default , unspecified type
* IRQ_TYPE_EDGE_RISING - rising edge triggered
* IRQ_TYPE_EDGE_FALLING - falling edge triggered
* IRQ_TYPE_EDGE_BOTH - rising and falling edge triggered
* IRQ_TYPE_LEVEL_HIGH - high level triggered
* IRQ_TYPE_LEVEL_LOW - low level triggered
* IRQ_TYPE_LEVEL_MASK - Mask to filter out the level bits
* IRQ_TYPE_SENSE_MASK - Mask for all the above bits
* IRQ_TYPE_DEFAULT - For use by some PICs to ask irq_set_type
* to setup the HW to a sane default ( used
* by irqdomain map ( ) callbacks to synchronize
* the HW state and SW flags for a newly
* allocated descriptor ) .
*
* IRQ_TYPE_PROBE - Special flag for probing in progress
*
* Bits which can be modified via irq_set / clear / modify_status_flags ( )
* IRQ_LEVEL - Interrupt is level type . Will be also
* updated in the code when the above trigger
* bits are modified via irq_set_irq_type ( )
* IRQ_PER_CPU - Mark an interrupt PER_CPU . Will protect
* it from affinity setting
* IRQ_NOPROBE - Interrupt cannot be probed by autoprobing
* IRQ_NOREQUEST - Interrupt cannot be requested via
* request_irq ( )
* IRQ_NOTHREAD - Interrupt cannot be threaded
* IRQ_NOAUTOEN - Interrupt is not automatically enabled in
* request / setup_irq ( )
* IRQ_NO_BALANCING - Interrupt cannot be balanced ( affinity set )
* IRQ_NESTED_THREAD - Interrupt nests into another thread
* IRQ_PER_CPU_DEVID - Dev_id is a per - cpu variable
* IRQ_IS_POLLED - Always polled by another interrupt . Exclude
* it from the spurious interrupt detection
* mechanism and from core side polling .
* IRQ_DISABLE_UNLAZY - Disable lazy irq disable
* IRQ_HIDDEN - Don ' t show up in / proc / interrupts
* IRQ_NO_DEBUG - Exclude from note_interrupt ( ) debugging
*/
enum {
IRQ_TYPE_NONE = 0 x00000000,
IRQ_TYPE_EDGE_RISING = 0 x00000001,
IRQ_TYPE_EDGE_FALLING = 0 x00000002,
IRQ_TYPE_EDGE_BOTH = (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING),
IRQ_TYPE_LEVEL_HIGH = 0 x00000004,
IRQ_TYPE_LEVEL_LOW = 0 x00000008,
IRQ_TYPE_LEVEL_MASK = (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH),
IRQ_TYPE_SENSE_MASK = 0 x0000000f,
IRQ_TYPE_DEFAULT = IRQ_TYPE_SENSE_MASK,
IRQ_TYPE_PROBE = 0 x00000010,
IRQ_LEVEL = (1 << 8 ),
IRQ_PER_CPU = (1 << 9 ),
IRQ_NOPROBE = (1 << 10 ),
IRQ_NOREQUEST = (1 << 11 ),
IRQ_NOAUTOEN = (1 << 12 ),
IRQ_NO_BALANCING = (1 << 13 ),
IRQ_NESTED_THREAD = (1 << 15 ),
IRQ_NOTHREAD = (1 << 16 ),
IRQ_PER_CPU_DEVID = (1 << 17 ),
IRQ_IS_POLLED = (1 << 18 ),
IRQ_DISABLE_UNLAZY = (1 << 19 ),
IRQ_HIDDEN = (1 << 20 ),
IRQ_NO_DEBUG = (1 << 21 ),
};
#define IRQF_MODIFY_MASK \
(IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \
IRQ_NOAUTOEN | IRQ_LEVEL | IRQ_NO_BALANCING | \
IRQ_PER_CPU | IRQ_NESTED_THREAD | IRQ_NOTHREAD | IRQ_PER_CPU_DEVID | \
IRQ_IS_POLLED | IRQ_DISABLE_UNLAZY | IRQ_HIDDEN)
#define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
/*
* Return value for chip - > irq_set_affinity ( )
*
* IRQ_SET_MASK_OK - OK , core updates irq_common_data . affinity
* IRQ_SET_MASK_NOCOPY - OK , chip did update irq_common_data . affinity
* IRQ_SET_MASK_OK_DONE - Same as IRQ_SET_MASK_OK for core . Special code to
* support stacked irqchips , which indicates skipping
* all descendant irqchips .
*/
enum {
IRQ_SET_MASK_OK = 0 ,
IRQ_SET_MASK_OK_NOCOPY,
IRQ_SET_MASK_OK_DONE,
};
struct msi_desc;
struct irq_domain;
/**
* struct irq_common_data - per irq data shared by all irqchips
* @ state_use_accessors : status information for irq chip functions .
* Use accessor functions to deal with it
* @ node : node index useful for balancing
* @ handler_data : per - IRQ data for the irq_chip methods
* @ affinity : IRQ affinity on SMP . If this is an IPI
* related irq , then this is the mask of the
* CPUs to which an IPI can be sent .
* @ effective_affinity : The effective IRQ affinity on SMP as some irq
* chips do not allow multi CPU destinations .
* A subset of @ affinity .
* @ msi_desc : MSI descriptor
* @ ipi_offset : Offset of first IPI target cpu in @ affinity . Optional .
*/
struct irq_common_data {
unsigned int __private state_use_accessors;
#ifdef CONFIG_NUMA
unsigned int node;
#endif
void *handler_data;
struct msi_desc *msi_desc;
#ifdef CONFIG_SMP
cpumask_var_t affinity;
#endif
#ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
cpumask_var_t effective_affinity;
#endif
#ifdef CONFIG_GENERIC_IRQ_IPI
unsigned int ipi_offset;
#endif
};
/**
* struct irq_data - per irq chip data passed down to chip functions
* @ mask : precomputed bitmask for accessing the chip registers
* @ irq : interrupt number
* @ hwirq : hardware interrupt number , local to the interrupt domain
* @ common : point to data shared by all irqchips
* @ chip : low level interrupt hardware access
* @ domain : Interrupt translation domain ; responsible for mapping
* between hwirq number and linux irq number .
* @ parent_data : pointer to parent struct irq_data to support hierarchy
* irq_domain
* @ chip_data : platform - specific per - chip private data for the chip
* methods , to allow shared chip implementations
*/
struct irq_data {
u32 mask;
unsigned int irq;
irq_hw_number_t hwirq;
struct irq_common_data *common;
struct irq_chip *chip;
struct irq_domain *domain;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
struct irq_data *parent_data;
#endif
void *chip_data;
};
/*
* Bit masks for irq_common_data . state_use_accessors
*
* IRQD_TRIGGER_MASK - Mask for the trigger type bits
* IRQD_SETAFFINITY_PENDING - Affinity setting is pending
* IRQD_ACTIVATED - Interrupt has already been activated
* IRQD_NO_BALANCING - Balancing disabled for this IRQ
* IRQD_PER_CPU - Interrupt is per cpu
* IRQD_AFFINITY_SET - Interrupt affinity was set
* IRQD_LEVEL - Interrupt is level triggered
* IRQD_WAKEUP_STATE - Interrupt is configured for wakeup
* from suspend
* IRQD_IRQ_DISABLED - Disabled state of the interrupt
* IRQD_IRQ_MASKED - Masked state of the interrupt
* IRQD_IRQ_INPROGRESS - In progress state of the interrupt
* IRQD_WAKEUP_ARMED - Wakeup mode armed
* IRQD_FORWARDED_TO_VCPU - The interrupt is forwarded to a VCPU
* IRQD_AFFINITY_MANAGED - Affinity is auto - managed by the kernel
* IRQD_IRQ_STARTED - Startup state of the interrupt
* IRQD_MANAGED_SHUTDOWN - Interrupt was shutdown due to empty affinity
* mask . Applies only to affinity managed irqs .
* IRQD_SINGLE_TARGET - IRQ allows only a single affinity target
* IRQD_DEFAULT_TRIGGER_SET - Expected trigger already been set
* IRQD_CAN_RESERVE - Can use reservation mode
* IRQD_HANDLE_ENFORCE_IRQCTX - Enforce that handle_irq_ * ( ) is only invoked
* from actual interrupt context .
* IRQD_AFFINITY_ON_ACTIVATE - Affinity is set on activation . Don ' t call
* irq_chip : : irq_set_affinity ( ) when deactivated .
* IRQD_IRQ_ENABLED_ON_SUSPEND - Interrupt is enabled on suspend by irq pm if
* irqchip have flag IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND set .
* IRQD_RESEND_WHEN_IN_PROGRESS - Interrupt may fire when already in progress in which
* case it must be resent at the next available opportunity .
*/
enum {
IRQD_TRIGGER_MASK = 0 xf,
IRQD_SETAFFINITY_PENDING = BIT(8 ),
IRQD_ACTIVATED = BIT(9 ),
IRQD_NO_BALANCING = BIT(10 ),
IRQD_PER_CPU = BIT(11 ),
IRQD_AFFINITY_SET = BIT(12 ),
IRQD_LEVEL = BIT(13 ),
IRQD_WAKEUP_STATE = BIT(14 ),
IRQD_IRQ_DISABLED = BIT(16 ),
IRQD_IRQ_MASKED = BIT(17 ),
IRQD_IRQ_INPROGRESS = BIT(18 ),
IRQD_WAKEUP_ARMED = BIT(19 ),
IRQD_FORWARDED_TO_VCPU = BIT(20 ),
IRQD_AFFINITY_MANAGED = BIT(21 ),
IRQD_IRQ_STARTED = BIT(22 ),
IRQD_MANAGED_SHUTDOWN = BIT(23 ),
IRQD_SINGLE_TARGET = BIT(24 ),
IRQD_DEFAULT_TRIGGER_SET = BIT(25 ),
IRQD_CAN_RESERVE = BIT(26 ),
IRQD_HANDLE_ENFORCE_IRQCTX = BIT(27 ),
IRQD_AFFINITY_ON_ACTIVATE = BIT(28 ),
IRQD_IRQ_ENABLED_ON_SUSPEND = BIT(29 ),
IRQD_RESEND_WHEN_IN_PROGRESS = BIT(30 ),
};
#define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_SETAFFINITY_PENDING;
}
static inline bool irqd_is_per_cpu(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_PER_CPU;
}
static inline bool irqd_can_balance(struct irq_data *d)
{
return !(__irqd_to_state(d) & (IRQD_PER_CPU | IRQD_NO_BALANCING));
}
static inline bool irqd_affinity_was_set(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_AFFINITY_SET;
}
static inline void irqd_mark_affinity_was_set(struct irq_data *d)
{
__irqd_to_state(d) |= IRQD_AFFINITY_SET;
}
static inline bool irqd_trigger_type_was_set(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_DEFAULT_TRIGGER_SET;
}
static inline u32 irqd_get_trigger_type(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_TRIGGER_MASK;
}
/*
* Must only be called inside irq_chip . irq_set_type ( ) functions or
* from the DT / ACPI setup code .
*/
static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)
{
__irqd_to_state(d) &= ~IRQD_TRIGGER_MASK;
__irqd_to_state(d) |= type & IRQD_TRIGGER_MASK;
__irqd_to_state(d) |= IRQD_DEFAULT_TRIGGER_SET;
}
static inline bool irqd_is_level_type(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_LEVEL;
}
/*
* Must only be called of irqchip . irq_set_affinity ( ) or low level
* hierarchy domain allocation functions .
*/
static inline void irqd_set_single_target(struct irq_data *d)
{
__irqd_to_state(d) |= IRQD_SINGLE_TARGET;
}
static inline bool irqd_is_single_target(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_SINGLE_TARGET;
}
static inline void irqd_set_handle_enforce_irqctx(struct irq_data *d)
{
__irqd_to_state(d) |= IRQD_HANDLE_ENFORCE_IRQCTX;
}
static inline bool irqd_is_handle_enforce_irqctx(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_HANDLE_ENFORCE_IRQCTX;
}
static inline bool irqd_is_enabled_on_suspend(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_IRQ_ENABLED_ON_SUSPEND;
}
static inline bool irqd_is_wakeup_set(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_WAKEUP_STATE;
}
static inline bool irqd_irq_disabled(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_IRQ_DISABLED;
}
static inline bool irqd_irq_masked(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_IRQ_MASKED;
}
static inline bool irqd_irq_inprogress(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_IRQ_INPROGRESS;
}
static inline bool irqd_is_wakeup_armed(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_WAKEUP_ARMED;
}
static inline bool irqd_is_forwarded_to_vcpu(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_FORWARDED_TO_VCPU;
}
static inline void irqd_set_forwarded_to_vcpu(struct irq_data *d)
{
__irqd_to_state(d) |= IRQD_FORWARDED_TO_VCPU;
}
static inline void irqd_clr_forwarded_to_vcpu(struct irq_data *d)
{
__irqd_to_state(d) &= ~IRQD_FORWARDED_TO_VCPU;
}
static inline bool irqd_affinity_is_managed(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_AFFINITY_MANAGED;
}
static inline bool irqd_is_activated(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_ACTIVATED;
}
static inline void irqd_set_activated(struct irq_data *d)
{
__irqd_to_state(d) |= IRQD_ACTIVATED;
}
static inline void irqd_clr_activated(struct irq_data *d)
{
__irqd_to_state(d) &= ~IRQD_ACTIVATED;
}
static inline bool irqd_is_started(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_IRQ_STARTED;
}
static inline bool irqd_is_managed_and_shutdown(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_MANAGED_SHUTDOWN;
}
static inline void irqd_set_can_reserve(struct irq_data *d)
{
__irqd_to_state(d) |= IRQD_CAN_RESERVE;
}
static inline void irqd_clr_can_reserve(struct irq_data *d)
{
__irqd_to_state(d) &= ~IRQD_CAN_RESERVE;
}
static inline bool irqd_can_reserve(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_CAN_RESERVE;
}
static inline void irqd_set_affinity_on_activate(struct irq_data *d)
{
__irqd_to_state(d) |= IRQD_AFFINITY_ON_ACTIVATE;
}
static inline bool irqd_affinity_on_activate(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_AFFINITY_ON_ACTIVATE;
}
static inline void irqd_set_resend_when_in_progress(struct irq_data *d)
{
__irqd_to_state(d) |= IRQD_RESEND_WHEN_IN_PROGRESS;
}
static inline bool irqd_needs_resend_when_in_progress(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_RESEND_WHEN_IN_PROGRESS;
}
#undef __irqd_to_state
static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
{
return d->hwirq;
}
/**
* struct irq_chip - hardware interrupt chip descriptor
*
* @ name : name for / proc / interrupts
* @ irq_startup : start up the interrupt ( defaults to - > enable if NULL )
* @ irq_shutdown : shut down the interrupt ( defaults to - > disable if NULL )
* @ irq_enable : enable the interrupt ( defaults to chip - > unmask if NULL )
* @ irq_disable : disable the interrupt
* @ irq_ack : start of a new interrupt
* @ irq_mask : mask an interrupt source
* @ irq_mask_ack : ack and mask an interrupt source
* @ irq_unmask : unmask an interrupt source
* @ irq_eoi : end of interrupt
* @ irq_set_affinity : Set the CPU affinity on SMP machines . If the force
* argument is true , it tells the driver to
* unconditionally apply the affinity setting . Sanity
* checks against the supplied affinity mask are not
* required . This is used for CPU hotplug where the
* target CPU is not yet set in the cpu_online_mask .
* @ irq_retrigger : resend an IRQ to the CPU
* @ irq_set_type : set the flow type ( IRQ_TYPE_LEVEL / etc . ) of an IRQ
* @ irq_set_wake : enable / disable power - management wake - on of an IRQ
* @ irq_bus_lock : function to lock access to slow bus ( i2c ) chips
* @ irq_bus_sync_unlock : function to sync and unlock slow bus ( i2c ) chips
* @ irq_cpu_online : configure an interrupt source for a secondary CPU
* @ irq_cpu_offline : un - configure an interrupt source for a secondary CPU
* @ irq_suspend : function called from core code on suspend once per
* chip , when one or more interrupts are installed
* @ irq_resume : function called from core code on resume once per chip ,
* when one ore more interrupts are installed
* @ irq_pm_shutdown : function called from core code on shutdown once per chip
* @ irq_calc_mask : Optional function to set irq_data . mask for special cases
* @ irq_print_chip : optional to print special chip info in show_interrupts
* @ irq_request_resources : optional to request resources before calling
* any other callback related to this irq
* @ irq_release_resources : optional to release resources acquired with
* irq_request_resources
* @ irq_compose_msi_msg : optional to compose message content for MSI
* @ irq_write_msi_msg : optional to write message content for MSI
* @ irq_get_irqchip_state : return the internal state of an interrupt
* @ irq_set_irqchip_state : set the internal state of a interrupt
* @ irq_set_vcpu_affinity : optional to target a vCPU in a virtual machine
* @ ipi_send_single : send a single IPI to destination cpus
* @ ipi_send_mask : send an IPI to destination cpus in cpumask
* @ irq_nmi_setup : function called from core code before enabling an NMI
* @ irq_nmi_teardown : function called from core code after disabling an NMI
* @ irq_force_complete_move : optional function to force complete pending irq move
* @ flags : chip specific flags
*/
struct irq_chip {
const char *name;
unsigned int (*irq_startup)(struct irq_data *data);
void (*irq_shutdown)(struct irq_data *data);
void (*irq_enable)(struct irq_data *data);
void (*irq_disable)(struct irq_data *data);
void (*irq_ack)(struct irq_data *data);
void (*irq_mask)(struct irq_data *data);
void (*irq_mask_ack)(struct irq_data *data);
void (*irq_unmask)(struct irq_data *data);
void (*irq_eoi)(struct irq_data *data);
int (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force);
int (*irq_retrigger)(struct irq_data *data);
int (*irq_set_type)(struct irq_data *data, unsigned int flow_type);
int (*irq_set_wake)(struct irq_data *data, unsigned int on);
void (*irq_bus_lock)(struct irq_data *data);
void (*irq_bus_sync_unlock)(struct irq_data *data);
#ifdef CONFIG_DEPRECATED_IRQ_CPU_ONOFFLINE
void (*irq_cpu_online)(struct irq_data *data);
void (*irq_cpu_offline)(struct irq_data *data);
#endif
void (*irq_suspend)(struct irq_data *data);
void (*irq_resume)(struct irq_data *data);
void (*irq_pm_shutdown)(struct irq_data *data);
void (*irq_calc_mask)(struct irq_data *data);
void (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
int (*irq_request_resources)(struct irq_data *data);
void (*irq_release_resources)(struct irq_data *data);
void (*irq_compose_msi_msg)(struct irq_data *data, struct msi_msg *msg);
void (*irq_write_msi_msg)(struct irq_data *data, struct msi_msg *msg);
int (*irq_get_irqchip_state)(struct irq_data *data, enum irqchip_irq_state which, bool *state);
int (*irq_set_irqchip_state)(struct irq_data *data, enum irqchip_irq_state which, bool state);
int (*irq_set_vcpu_affinity)(struct irq_data *data, void *vcpu_info);
void (*ipi_send_single)(struct irq_data *data, unsigned int cpu);
void (*ipi_send_mask)(struct irq_data *data, const struct cpumask *dest);
int (*irq_nmi_setup)(struct irq_data *data);
void (*irq_nmi_teardown)(struct irq_data *data);
void (*irq_force_complete_move)(struct irq_data *data);
unsigned long flags;
};
/*
* irq_chip specific flags
*
* IRQCHIP_SET_TYPE_MASKED : Mask before calling chip . irq_set_type ( )
* IRQCHIP_EOI_IF_HANDLED : Only issue irq_eoi ( ) when irq was handled
* IRQCHIP_MASK_ON_SUSPEND : Mask non wake irqs in the suspend path
* IRQCHIP_ONOFFLINE_ENABLED : Only call irq_on / off_line callbacks
* when irq enabled
* IRQCHIP_SKIP_SET_WAKE : Skip chip . irq_set_wake ( ) , for this irq chip
* IRQCHIP_ONESHOT_SAFE : One shot does not require mask / unmask
* IRQCHIP_EOI_THREADED : Chip requires eoi ( ) on unmask in threaded mode
* IRQCHIP_SUPPORTS_LEVEL_MSI : Chip can provide two doorbells for Level MSIs
* IRQCHIP_SUPPORTS_NMI : Chip can deliver NMIs , only for root irqchips
* IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND : Invokes _ _ enable_irq ( ) / _ _ disable_irq ( ) for wake irqs
* in the suspend path if they are in disabled state
* IRQCHIP_AFFINITY_PRE_STARTUP : Default affinity update before startup
* IRQCHIP_IMMUTABLE : Don ' t ever change anything in this chip
* IRQCHIP_MOVE_DEFERRED : Move the interrupt in actual interrupt context
*/
enum {
IRQCHIP_SET_TYPE_MASKED = (1 << 0 ),
IRQCHIP_EOI_IF_HANDLED = (1 << 1 ),
IRQCHIP_MASK_ON_SUSPEND = (1 << 2 ),
IRQCHIP_ONOFFLINE_ENABLED = (1 << 3 ),
IRQCHIP_SKIP_SET_WAKE = (1 << 4 ),
IRQCHIP_ONESHOT_SAFE = (1 << 5 ),
IRQCHIP_EOI_THREADED = (1 << 6 ),
IRQCHIP_SUPPORTS_LEVEL_MSI = (1 << 7 ),
IRQCHIP_SUPPORTS_NMI = (1 << 8 ),
IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND = (1 << 9 ),
IRQCHIP_AFFINITY_PRE_STARTUP = (1 << 10 ),
IRQCHIP_IMMUTABLE = (1 << 11 ),
IRQCHIP_MOVE_DEFERRED = (1 << 12 ),
};
#include <linux/irqdesc.h>
/*
* Pick up the arch - dependent methods :
*/
#include <asm /hw_irq.h>
#ifndef NR_IRQS_LEGACY
# define NR_IRQS_LEGACY 0
#endif
#ifndef ARCH_IRQ_INIT_FLAGS
# define ARCH_IRQ_INIT_FLAGS 0
#endif
#define IRQ_DEFAULT_INIT_FLAGS ARCH_IRQ_INIT_FLAGS
struct irqaction;
extern int setup_percpu_irq(unsigned int irq, struct irqaction *new );
#ifdef CONFIG_DEPRECATED_IRQ_CPU_ONOFFLINE
extern void irq_cpu_online(void );
extern void irq_cpu_offline(void );
#endif
extern int irq_set_affinity_locked(struct irq_data *data,
const struct cpumask *cpumask, bool force);
extern int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info);
#if defined (CONFIG_SMP) && defined (CONFIG_GENERIC_IRQ_MIGRATION)
extern void irq_migrate_all_off_this_cpu(void );
extern int irq_affinity_online_cpu(unsigned int cpu);
#else
# define irq_affinity_online_cpu NULL
#endif
#if defined (CONFIG_SMP) && defined (CONFIG_GENERIC_PENDING_IRQ)
bool irq_can_move_in_process_context(struct irq_data *data);
void __irq_move_irq(struct irq_data *data);
static inline void irq_move_irq(struct irq_data *data)
{
if (unlikely(irqd_is_setaffinity_pending(data)))
__irq_move_irq(data);
}
void irq_move_masked_irq(struct irq_data *data);
#else
static inline bool irq_can_move_in_process_context(struct irq_data *data) { return true ; }
static inline void irq_move_irq(struct irq_data *data) { }
static inline void irq_move_masked_irq(struct irq_data *data) { }
#endif
extern int no_irq_affinity;
#ifdef CONFIG_HARDIRQS_SW_RESEND
int irq_set_parent(int irq, int parent_irq);
#else
static inline int irq_set_parent(int irq, int parent_irq)
{
return 0 ;
}
#endif
/*
* Built - in IRQ handlers for various IRQ types ,
* callable via desc - > handle_irq ( )
*/
extern void handle_level_irq(struct irq_desc *desc);
extern void handle_fasteoi_irq(struct irq_desc *desc);
extern void handle_edge_irq(struct irq_desc *desc);
extern void handle_edge_eoi_irq(struct irq_desc *desc);
extern void handle_simple_irq(struct irq_desc *desc);
extern void handle_untracked_irq(struct irq_desc *desc);
extern void handle_percpu_irq(struct irq_desc *desc);
extern void handle_percpu_devid_irq(struct irq_desc *desc);
extern void handle_bad_irq(struct irq_desc *desc);
extern void handle_nested_irq(unsigned int irq);
extern void handle_fasteoi_nmi(struct irq_desc *desc);
extern void handle_percpu_devid_fasteoi_nmi(struct irq_desc *desc);
extern int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg);
extern int irq_chip_pm_get(struct irq_data *data);
extern int irq_chip_pm_put(struct irq_data *data);
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
extern void handle_fasteoi_ack_irq(struct irq_desc *desc);
extern void handle_fasteoi_mask_irq(struct irq_desc *desc);
extern int irq_chip_set_parent_state(struct irq_data *data,
enum irqchip_irq_state which,
bool val);
extern int irq_chip_get_parent_state(struct irq_data *data,
enum irqchip_irq_state which,
bool *state);
extern void irq_chip_shutdown_parent(struct irq_data *data);
extern unsigned int irq_chip_startup_parent(struct irq_data *data);
extern void irq_chip_enable_parent(struct irq_data *data);
extern void irq_chip_disable_parent(struct irq_data *data);
extern void irq_chip_ack_parent(struct irq_data *data);
extern int irq_chip_retrigger_hierarchy(struct irq_data *data);
extern void irq_chip_mask_parent(struct irq_data *data);
extern void irq_chip_mask_ack_parent(struct irq_data *data);
extern void irq_chip_unmask_parent(struct irq_data *data);
extern void irq_chip_eoi_parent(struct irq_data *data);
extern int irq_chip_set_affinity_parent(struct irq_data *data,
const struct cpumask *dest,
bool force);
extern int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on);
extern int irq_chip_set_vcpu_affinity_parent(struct irq_data *data,
void *vcpu_info);
extern int irq_chip_set_type_parent(struct irq_data *data, unsigned int type);
extern int irq_chip_request_resources_parent(struct irq_data *data);
extern void irq_chip_release_resources_parent(struct irq_data *data);
#endif
/* Disable or mask interrupts during a kernel kexec */
extern void machine_kexec_mask_interrupts(void );
/* Handling of unhandled and spurious interrupts: */
extern void note_interrupt(struct irq_desc *desc, irqreturn_t action_ret);
/* Enable/disable irq debugging output: */
extern int noirqdebug_setup(char *str);
/* Checks whether the interrupt can be requested by request_irq(): */
extern bool can_request_irq(unsigned int irq, unsigned long irqflags);
/* Dummy irq-chip implementations: */
extern struct irq_chip no_irq_chip;
extern struct irq_chip dummy_irq_chip;
extern void
irq_set_chip_and_handler_name(unsigned int irq, const struct irq_chip *chip,
irq_flow_handler_t handle, const char *name);
static inline void irq_set_chip_and_handler(unsigned int irq,
const struct irq_chip *chip,
irq_flow_handler_t handle)
{
irq_set_chip_and_handler_name(irq, chip, handle, NULL);
}
extern int irq_set_percpu_devid(unsigned int irq);
extern int irq_set_percpu_devid_partition(unsigned int irq,
const struct cpumask *affinity);
extern int irq_get_percpu_devid_partition(unsigned int irq,
struct cpumask *affinity);
extern void
__irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
const char *name);
static inline void
irq_set_handler(unsigned int irq, irq_flow_handler_t handle)
{
__irq_set_handler(irq, handle, 0 , NULL);
}
/*
* Set a highlevel chained flow handler for a given IRQ .
* ( a chained handler is automatically enabled and set to
* IRQ_NOREQUEST , IRQ_NOPROBE , and IRQ_NOTHREAD )
*/
static inline void
irq_set_chained_handler(unsigned int irq, irq_flow_handler_t handle)
{
__irq_set_handler(irq, handle, 1 , NULL);
}
/*
* Set a highlevel chained flow handler and its data for a given IRQ .
* ( a chained handler is automatically enabled and set to
* IRQ_NOREQUEST , IRQ_NOPROBE , and IRQ_NOTHREAD )
*/
void
irq_set_chained_handler_and_data(unsigned int irq, irq_flow_handler_t handle,
void *data);
void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set);
static inline void irq_set_status_flags(unsigned int irq, unsigned long set)
{
irq_modify_status(irq, 0 , set);
}
static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr)
{
irq_modify_status(irq, clr, 0 );
}
static inline void irq_set_noprobe(unsigned int irq)
{
irq_modify_status(irq, 0 , IRQ_NOPROBE);
}
static inline void irq_set_probe(unsigned int irq)
{
irq_modify_status(irq, IRQ_NOPROBE, 0 );
}
static inline void irq_set_nothread(unsigned int irq)
{
irq_modify_status(irq, 0 , IRQ_NOTHREAD);
}
static inline void irq_set_thread(unsigned int irq)
{
irq_modify_status(irq, IRQ_NOTHREAD, 0 );
}
static inline void irq_set_nested_thread(unsigned int irq, bool nest)
{
if (nest)
irq_set_status_flags(irq, IRQ_NESTED_THREAD);
else
irq_clear_status_flags(irq, IRQ_NESTED_THREAD);
}
static inline void irq_set_percpu_devid_flags(unsigned int irq)
{
irq_set_status_flags(irq,
IRQ_NOAUTOEN | IRQ_PER_CPU | IRQ_NOTHREAD |
IRQ_NOPROBE | IRQ_PER_CPU_DEVID);
}
/* Set/get chip/data for an IRQ: */
extern int irq_set_chip(unsigned int irq, const struct irq_chip *chip);
extern int irq_set_handler_data(unsigned int irq, void *data);
extern int irq_set_chip_data(unsigned int irq, void *data);
extern int irq_set_irq_type(unsigned int irq, unsigned int type);
extern int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry);
extern int irq_set_msi_desc_off(unsigned int irq_base, unsigned int irq_offset,
struct msi_desc *entry);
extern struct irq_data *irq_get_irq_data(unsigned int irq);
static inline struct irq_chip *irq_get_chip(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? d->chip : NULL;
}
static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d)
{
return d->chip;
}
static inline void *irq_get_chip_data(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? d->chip_data : NULL;
}
static inline void *irq_data_get_irq_chip_data(struct irq_data *d)
{
return d->chip_data;
}
static inline void *irq_get_handler_data(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? d->common->handler_data : NULL;
}
static inline void *irq_data_get_irq_handler_data(struct irq_data *d)
{
return d->common->handler_data;
}
static inline struct msi_desc *irq_get_msi_desc(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? d->common->msi_desc : NULL;
}
static inline struct msi_desc *irq_data_get_msi_desc(struct irq_data *d)
{
return d->common->msi_desc;
}
static inline u32 irq_get_trigger_type(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? irqd_get_trigger_type(d) : 0 ;
}
static inline int irq_common_data_get_node(struct irq_common_data *d)
{
#ifdef CONFIG_NUMA
return d->node;
#else
return 0 ;
#endif
}
static inline int irq_data_get_node(struct irq_data *d)
{
return irq_common_data_get_node(d->common);
}
static inline
const struct cpumask *irq_data_get_affinity_mask(struct irq_data *d)
{
#ifdef CONFIG_SMP
return d->common->affinity;
#else
return cpumask_of(0 );
#endif
}
static inline void irq_data_update_affinity(struct irq_data *d,
const struct cpumask *m)
{
#ifdef CONFIG_SMP
cpumask_copy(d->common->affinity, m);
#endif
}
static inline const struct cpumask *irq_get_affinity_mask(int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? irq_data_get_affinity_mask(d) : NULL;
}
#ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
static inline
const struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d)
{
return d->common->effective_affinity;
}
static inline void irq_data_update_effective_affinity(struct irq_data *d,
const struct cpumask *m)
{
cpumask_copy(d->common->effective_affinity, m);
}
#else
static inline void irq_data_update_effective_affinity(struct irq_data *d,
const struct cpumask *m)
{
}
static inline
const struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d)
{
return irq_data_get_affinity_mask(d);
}
#endif
static inline
const struct cpumask *irq_get_effective_affinity_mask(unsigned int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
return d ? irq_data_get_effective_affinity_mask(d) : NULL;
}
unsigned int arch_dynirq_lower_bound(unsigned int from);
int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
struct module *owner,
const struct irq_affinity_desc *affinity);
int __devm_irq_alloc_descs(struct device *dev, int irq, unsigned int from,
unsigned int cnt, int node, struct module *owner,
const struct irq_affinity_desc *affinity);
/* use macros to avoid needing export.h for THIS_MODULE */
#define irq_alloc_descs(irq, from, cnt, node) \
__irq_alloc_descs(irq, from, cnt, node, THIS_MODULE, NULL)
#define irq_alloc_desc(node) \
irq_alloc_descs(-1 , 1 , 1 , node)
#define irq_alloc_desc_at(at, node) \
irq_alloc_descs(at, at, 1 , node)
#define irq_alloc_desc_from(from, node) \
irq_alloc_descs(-1 , from, 1 , node)
#define irq_alloc_descs_from(from, cnt, node) \
irq_alloc_descs(-1 , from, cnt, node)
#define devm_irq_alloc_descs(dev, irq, from, cnt, node) \
__devm_irq_alloc_descs(dev, irq, from, cnt, node, THIS_MODULE, NULL)
#define devm_irq_alloc_desc(dev, node) \
devm_irq_alloc_descs(dev, -1 , 1 , 1 , node)
#define devm_irq_alloc_desc_at(dev, at, node) \
devm_irq_alloc_descs(dev, at, at, 1 , node)
#define devm_irq_alloc_desc_from(dev, from, node) \
devm_irq_alloc_descs(dev, -1 , from, 1 , node)
#define devm_irq_alloc_descs_from(dev, from, cnt, node) \
devm_irq_alloc_descs(dev, -1 , from, cnt, node)
void irq_free_descs(unsigned int irq, unsigned int cnt);
static inline void irq_free_desc(unsigned int irq)
{
irq_free_descs(irq, 1 );
}
#ifdef CONFIG_GENERIC_IRQ_LEGACY
void irq_init_desc(unsigned int irq);
#endif
/**
* struct irq_chip_regs - register offsets for struct irq_gci
* @ enable : Enable register offset to reg_base
* @ disable : Disable register offset to reg_base
* @ mask : Mask register offset to reg_base
* @ ack : Ack register offset to reg_base
* @ eoi : Eoi register offset to reg_base
* @ type : Type configuration register offset to reg_base
*/
struct irq_chip_regs {
unsigned long enable;
unsigned long disable;
unsigned long mask;
unsigned long ack;
unsigned long eoi;
unsigned long type;
};
/**
* struct irq_chip_type - Generic interrupt chip instance for a flow type
* @ chip : The real interrupt chip which provides the callbacks
* @ regs : Register offsets for this chip
* @ handler : Flow handler associated with this chip
* @ type : Chip can handle these flow types
* @ mask_cache_priv : Cached mask register private to the chip type
* @ mask_cache : Pointer to cached mask register
*
* A irq_generic_chip can have several instances of irq_chip_type when
* it requires different functions and register offsets for different
* flow types .
*/
struct irq_chip_type {
struct irq_chip chip;
struct irq_chip_regs regs;
irq_flow_handler_t handler;
u32 type;
u32 mask_cache_priv;
u32 *mask_cache;
};
/**
* struct irq_chip_generic - Generic irq chip data structure
* @ lock : Lock to protect register and cache data access
* @ reg_base : Register base address ( virtual )
* @ reg_readl : Alternate I / O accessor ( defaults to readl if NULL )
* @ reg_writel : Alternate I / O accessor ( defaults to writel if NULL )
* @ suspend : Function called from core code on suspend once per
* chip ; can be useful instead of irq_chip : : suspend to
* handle chip details even when no interrupts are in use
* @ resume : Function called from core code on resume once per chip ;
* can be useful instead of irq_chip : : suspend to handle
* chip details even when no interrupts are in use
* @ irq_base : Interrupt base nr for this chip
* @ irq_cnt : Number of interrupts handled by this chip
* @ mask_cache : Cached mask register shared between all chip types
* @ wake_enabled : Interrupt can wakeup from suspend
* @ wake_active : Interrupt is marked as an wakeup from suspend source
* @ num_ct : Number of available irq_chip_type instances ( usually 1 )
* @ private : Private data for non generic chip callbacks
* @ installed : bitfield to denote installed interrupts
* @ unused : bitfield to denote unused interrupts
* @ domain : irq domain pointer
* @ list : List head for keeping track of instances
* @ chip_types : Array of interrupt irq_chip_types
*
* Note , that irq_chip_generic can have multiple irq_chip_type
* implementations which can be associated to a particular irq line of
* an irq_chip_generic instance . That allows to share and protect
* state in an irq_chip_generic instance when we need to implement
* different flow mechanisms ( level / edge ) for it .
*/
struct irq_chip_generic {
raw_spinlock_t lock;
void __iomem *reg_base;
u32 (*reg_readl)(void __iomem *addr);
void (*reg_writel)(u32 val, void __iomem *addr);
void (*suspend)(struct irq_chip_generic *gc);
void (*resume)(struct irq_chip_generic *gc);
unsigned int irq_base;
unsigned int irq_cnt;
u32 mask_cache;
u32 wake_enabled;
u32 wake_active;
unsigned int num_ct;
void *private ;
unsigned long installed;
unsigned long unused;
struct irq_domain *domain;
struct list_head list;
struct irq_chip_type chip_types[];
};
/**
* enum irq_gc_flags - Initialization flags for generic irq chips
* @ IRQ_GC_INIT_MASK_CACHE : Initialize the mask_cache by reading mask reg
* @ IRQ_GC_INIT_NESTED_LOCK : Set the lock class of the irqs to nested for
* irq chips which need to call irq_set_wake ( ) on
* the parent irq . Usually GPIO implementations
* @ IRQ_GC_MASK_CACHE_PER_TYPE : Mask cache is chip type private
* @ IRQ_GC_NO_MASK : Do not calculate irq_data - > mask
* @ IRQ_GC_BE_IO : Use big - endian register accesses ( default : LE )
*/
enum irq_gc_flags {
IRQ_GC_INIT_MASK_CACHE = 1 << 0 ,
IRQ_GC_INIT_NESTED_LOCK = 1 << 1 ,
IRQ_GC_MASK_CACHE_PER_TYPE = 1 << 2 ,
IRQ_GC_NO_MASK = 1 << 3 ,
IRQ_GC_BE_IO = 1 << 4 ,
};
/*
* struct irq_domain_chip_generic - Generic irq chip data structure for irq domains
* @ irqs_per_chip : Number of interrupts per chip
* @ num_chips : Number of chips
* @ irq_flags_to_set : IRQ * flags to set on irq setup
* @ irq_flags_to_clear : IRQ * flags to clear on irq setup
* @ gc_flags : Generic chip specific setup flags
* @ exit : Function called on each chip when they are destroyed .
* @ gc : Array of pointers to generic interrupt chips
*/
struct irq_domain_chip_generic {
unsigned int irqs_per_chip;
unsigned int num_chips;
unsigned int irq_flags_to_clear;
unsigned int irq_flags_to_set;
enum irq_gc_flags gc_flags;
void (*exit )(struct irq_chip_generic *gc);
struct irq_chip_generic *gc[];
};
/**
* struct irq_domain_chip_generic_info - Generic chip information structure
* @ name : Name of the generic interrupt chip
* @ handler : Interrupt handler used by the generic interrupt chip
* @ irqs_per_chip : Number of interrupts each chip handles ( max 32 )
* @ num_ct : Number of irq_chip_type instances associated with each
* chip
* @ irq_flags_to_clear : IRQ_ * bits to clear in the mapping function
* @ irq_flags_to_set : IRQ_ * bits to set in the mapping function
* @ gc_flags : Generic chip specific setup flags
* @ init : Function called on each chip when they are created .
* Allow to do some additional chip initialisation .
* @ exit : Function called on each chip when they are destroyed .
* Allow to do some chip cleanup operation .
*/
struct irq_domain_chip_generic_info {
const char *name;
irq_flow_handler_t handler;
unsigned int irqs_per_chip;
unsigned int num_ct;
unsigned int irq_flags_to_clear;
unsigned int irq_flags_to_set;
enum irq_gc_flags gc_flags;
int (*init)(struct irq_chip_generic *gc);
void (*exit )(struct irq_chip_generic *gc);
};
/* Generic chip callback functions */
void irq_gc_noop(struct irq_data *d);
void irq_gc_mask_disable_reg(struct irq_data *d);
void irq_gc_mask_set_bit(struct irq_data *d);
void irq_gc_mask_clr_bit(struct irq_data *d);
void irq_gc_unmask_enable_reg(struct irq_data *d);
void irq_gc_ack_set_bit(struct irq_data *d);
void irq_gc_ack_clr_bit(struct irq_data *d);
void irq_gc_mask_disable_and_ack_set(struct irq_data *d);
void irq_gc_eoi(struct irq_data *d);
int irq_gc_set_wake(struct irq_data *d, unsigned int on);
/* Setup functions for irq_chip_generic */
int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
irq_hw_number_t hw_irq);
void irq_unmap_generic_chip(struct irq_domain *d, unsigned int virq);
struct irq_chip_generic *
irq_alloc_generic_chip(const char *name, int nr_ct, unsigned int irq_base,
void __iomem *reg_base, irq_flow_handler_t handler);
void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk,
enum irq_gc_flags flags, unsigned int clr,
unsigned int set);
int irq_setup_alt_chip(struct irq_data *d, unsigned int type);
void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk,
unsigned int clr, unsigned int set);
struct irq_chip_generic *
devm_irq_alloc_generic_chip(struct device *dev, const char *name, int num_ct,
unsigned int irq_base, void __iomem *reg_base,
irq_flow_handler_t handler);
int devm_irq_setup_generic_chip(struct device *dev, struct irq_chip_generic *gc,
u32 msk, enum irq_gc_flags flags,
unsigned int clr, unsigned int set);
struct irq_chip_generic *irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq);
#ifdef CONFIG_GENERIC_IRQ_CHIP
int irq_domain_alloc_generic_chips(struct irq_domain *d,
const struct irq_domain_chip_generic_info *info);
void irq_domain_remove_generic_chips(struct irq_domain *d);
#else
static inline int
irq_domain_alloc_generic_chips(struct irq_domain *d,
const struct irq_domain_chip_generic_info *info)
{
return -EINVAL;
}
static inline void irq_domain_remove_generic_chips(struct irq_domain *d) { }
#endif /* CONFIG_GENERIC_IRQ_CHIP */
int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
int num_ct, const char *name,
irq_flow_handler_t handler,
unsigned int clr, unsigned int set,
enum irq_gc_flags flags);
#define irq_alloc_domain_generic_chips(d, irqs_per_chip, num_ct, name, \
handler, clr, set, flags) \
({ \
MAYBE_BUILD_BUG_ON(irqs_per_chip > 32 ); \
__irq_alloc_domain_generic_chips(d, irqs_per_chip, num_ct, name,\
handler, clr, set, flags); \
})
static inline void irq_free_generic_chip(struct irq_chip_generic *gc)
{
kfree(gc);
}
static inline void irq_destroy_generic_chip(struct irq_chip_generic *gc,
u32 msk, unsigned int clr,
unsigned int set)
{
irq_remove_generic_chip(gc, msk, clr, set);
irq_free_generic_chip(gc);
}
static inline struct irq_chip_type *irq_data_get_chip_type(struct irq_data *d)
{
return container_of(d->chip, struct irq_chip_type, chip);
}
#define IRQ_MSK(n) (u32)((n) < 32 ? ((1 << (n)) - 1 ) : UINT_MAX)
static inline void irq_reg_writel(struct irq_chip_generic *gc,
u32 val, int reg_offset)
{
if (gc->reg_writel)
gc->reg_writel(val, gc->reg_base + reg_offset);
else
writel(val, gc->reg_base + reg_offset);
}
static inline u32 irq_reg_readl(struct irq_chip_generic *gc,
int reg_offset)
{
if (gc->reg_readl)
return gc->reg_readl(gc->reg_base + reg_offset);
else
return readl(gc->reg_base + reg_offset);
}
struct irq_matrix;
struct irq_matrix *irq_alloc_matrix(unsigned int matrix_bits,
unsigned int alloc_start,
unsigned int alloc_end);
void irq_matrix_online(struct irq_matrix *m);
void irq_matrix_offline(struct irq_matrix *m);
void irq_matrix_assign_system(struct irq_matrix *m, unsigned int bit, bool replace);
int irq_matrix_reserve_managed(struct irq_matrix *m, const struct cpumask *msk);
void irq_matrix_remove_managed(struct irq_matrix *m, const struct cpumask *msk);
int irq_matrix_alloc_managed(struct irq_matrix *m, const struct cpumask *msk,
unsigned int *mapped_cpu);
void irq_matrix_reserve(struct irq_matrix *m);
void irq_matrix_remove_reserved(struct irq_matrix *m);
int irq_matrix_alloc(struct irq_matrix *m, const struct cpumask *msk,
bool reserved, unsigned int *mapped_cpu);
void irq_matrix_free(struct irq_matrix *m, unsigned int cpu,
unsigned int bit, bool managed);
void irq_matrix_assign(struct irq_matrix *m, unsigned int bit);
unsigned int irq_matrix_available(struct irq_matrix *m, bool cpudown);
unsigned int irq_matrix_allocated(struct irq_matrix *m);
unsigned int irq_matrix_reserved(struct irq_matrix *m);
void irq_matrix_debug_show(struct seq_file *sf, struct irq_matrix *m, int ind);
/* Contrary to Linux irqs, for hardware irqs the irq number 0 is valid */
#define INVALID_HWIRQ (~0 UL)
irq_hw_number_t ipi_get_hwirq(unsigned int irq, unsigned int cpu);
int __ipi_send_single(struct irq_desc *desc, unsigned int cpu);
int __ipi_send_mask(struct irq_desc *desc, const struct cpumask *dest);
int ipi_send_single(unsigned int virq, unsigned int cpu);
int ipi_send_mask(unsigned int virq, const struct cpumask *dest);
void ipi_mux_process(void );
int ipi_mux_create(unsigned int nr_ipi, void (*mux_send)(unsigned int cpu));
#ifdef CONFIG_GENERIC_IRQ_MULTI_HANDLER
/*
* Registers a generic IRQ handling function as the top - level IRQ handler in
* the system , which is generally the first C code called from an assembly
* architecture - specific interrupt handler .
*
* Returns 0 on success , or - EBUSY if an IRQ handler has already been
* registered .
*/
int __init set_handle_irq(void (*handle_irq)(struct pt_regs *));
/*
* Allows interrupt handlers to find the irqchip that ' s been registered as the
* top - level IRQ handler .
*/
extern void (*handle_arch_irq)(struct pt_regs *) __ro_after_init;
asmlinkage void generic_handle_arch_irq(struct pt_regs *regs);
#else
#ifndef set_handle_irq
#define set_handle_irq(handle_irq) \
do { \
(void )handle_irq; \
WARN_ON(1 ); \
} while (0 )
#endif
#endif
#endif /* _LINUX_IRQ_H */
Messung V0.5 in Prozent C=98 H=99 G=98
¤ Dauer der Verarbeitung: 0.51 Sekunden
(vorverarbeitet am 2026-09-29)
¤
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