diff options
Diffstat (limited to 'include/linux/irq.h')
-rw-r--r-- | include/linux/irq.h | 1279 |
1 files changed, 1279 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h new file mode 100644 index 000000000..b89a8ac83 --- /dev/null +++ b/include/linux/irq.h @@ -0,0 +1,1279 @@ +/* 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_MOVE_PCNTXT - Interrupt can be migrated from process context + * 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 + */ +enum { + IRQ_TYPE_NONE = 0x00000000, + IRQ_TYPE_EDGE_RISING = 0x00000001, + IRQ_TYPE_EDGE_FALLING = 0x00000002, + IRQ_TYPE_EDGE_BOTH = (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING), + IRQ_TYPE_LEVEL_HIGH = 0x00000004, + IRQ_TYPE_LEVEL_LOW = 0x00000008, + IRQ_TYPE_LEVEL_MASK = (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH), + IRQ_TYPE_SENSE_MASK = 0x0000000f, + IRQ_TYPE_DEFAULT = IRQ_TYPE_SENSE_MASK, + + IRQ_TYPE_PROBE = 0x00000010, + + 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_MOVE_PCNTXT = (1 << 14), + 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), +}; + +#define IRQF_MODIFY_MASK \ + (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \ + IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | 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_NOCPY - 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; + cpumask_var_t affinity; +#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; + unsigned long 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_MOVE_PCNTXT - Interrupt can be moved in process + * context + * 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_MSI_NOMASK_QUIRK - Non-maskable MSI quirk for affinity change + * required + * 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. + */ +enum { + IRQD_TRIGGER_MASK = 0xf, + IRQD_SETAFFINITY_PENDING = (1 << 8), + IRQD_ACTIVATED = (1 << 9), + IRQD_NO_BALANCING = (1 << 10), + IRQD_PER_CPU = (1 << 11), + IRQD_AFFINITY_SET = (1 << 12), + IRQD_LEVEL = (1 << 13), + IRQD_WAKEUP_STATE = (1 << 14), + IRQD_MOVE_PCNTXT = (1 << 15), + IRQD_IRQ_DISABLED = (1 << 16), + IRQD_IRQ_MASKED = (1 << 17), + IRQD_IRQ_INPROGRESS = (1 << 18), + IRQD_WAKEUP_ARMED = (1 << 19), + IRQD_FORWARDED_TO_VCPU = (1 << 20), + IRQD_AFFINITY_MANAGED = (1 << 21), + IRQD_IRQ_STARTED = (1 << 22), + IRQD_MANAGED_SHUTDOWN = (1 << 23), + IRQD_SINGLE_TARGET = (1 << 24), + IRQD_DEFAULT_TRIGGER_SET = (1 << 25), + IRQD_CAN_RESERVE = (1 << 26), + IRQD_MSI_NOMASK_QUIRK = (1 << 27), + IRQD_HANDLE_ENFORCE_IRQCTX = (1 << 28), + IRQD_AFFINITY_ON_ACTIVATE = (1 << 29), + IRQD_IRQ_ENABLED_ON_SUSPEND = (1 << 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_can_move_in_process_context(struct irq_data *d) +{ + return __irqd_to_state(d) & IRQD_MOVE_PCNTXT; +} + +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_msi_nomask_quirk(struct irq_data *d) +{ + __irqd_to_state(d) |= IRQD_MSI_NOMASK_QUIRK; +} + +static inline void irqd_clr_msi_nomask_quirk(struct irq_data *d) +{ + __irqd_to_state(d) &= ~IRQD_MSI_NOMASK_QUIRK; +} + +static inline bool irqd_msi_nomask_quirk(struct irq_data *d) +{ + return __irqd_to_state(d) & IRQD_MSI_NOMASK_QUIRK; +} + +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; +} + +#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 + * + * @parent_device: pointer to parent device for irqchip + * @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 + * @flags: chip specific flags + */ +struct irq_chip { + struct device *parent_device; + 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); + + void (*irq_cpu_online)(struct irq_data *data); + void (*irq_cpu_offline)(struct irq_data *data); + + 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); + + 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 + */ +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), +}; + +#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); +extern void remove_percpu_irq(unsigned int irq, struct irqaction *act); + +extern void irq_cpu_online(void); +extern void irq_cpu_offline(void); +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) +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); +void irq_force_complete_move(struct irq_desc *desc); +#else +static inline void irq_move_irq(struct irq_data *data) { } +static inline void irq_move_masked_irq(struct irq_data *data) { } +static inline void irq_force_complete_move(struct irq_desc *desc) { } +#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_percpu_devid_fasteoi_ipi(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_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 + +/* 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 int 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, struct irq_chip *chip, + irq_flow_handler_t handle, const char *name); + +static inline void irq_set_chip_and_handler(unsigned int irq, 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, 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 struct cpumask *irq_get_affinity_mask(int irq) +{ + struct irq_data *d = irq_get_irq_data(irq); + + return d ? d->common->affinity : NULL; +} + +static inline struct cpumask *irq_data_get_affinity_mask(struct irq_data *d) +{ + return d->common->affinity; +} + +#ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK +static inline +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 +struct cpumask *irq_data_get_effective_affinity_mask(struct irq_data *d) +{ + return d->common->affinity; +} +#endif + +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_ALLOC_HWIRQ +unsigned int irq_alloc_hwirqs(int cnt, int node); +static inline unsigned int irq_alloc_hwirq(int node) +{ + return irq_alloc_hwirqs(1, node); +} +void irq_free_hwirqs(unsigned int from, int cnt); +static inline void irq_free_hwirq(unsigned int irq) +{ + return irq_free_hwirqs(irq, 1); +} +int arch_setup_hwirq(unsigned int irq, int node); +void arch_teardown_hwirq(unsigned int irq); +#endif + +#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 + * @polarity: Polarity 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; + unsigned long polarity; +}; + +/** + * 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 + * @type_cache: Cached type register + * @polarity_cache: Cached polarity register + * @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 type_cache; + u32 polarity_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 + * @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; + 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); +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); + +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) + +#ifdef CONFIG_SMP +static inline void irq_gc_lock(struct irq_chip_generic *gc) +{ + raw_spin_lock(&gc->lock); +} + +static inline void irq_gc_unlock(struct irq_chip_generic *gc) +{ + raw_spin_unlock(&gc->lock); +} +#else +static inline void irq_gc_lock(struct irq_chip_generic *gc) { } +static inline void irq_gc_unlock(struct irq_chip_generic *gc) { } +#endif + +/* + * The irqsave variants are for usage in non interrupt code. Do not use + * them in irq_chip callbacks. Use irq_gc_lock() instead. + */ +#define irq_gc_lock_irqsave(gc, flags) \ + raw_spin_lock_irqsave(&(gc)->lock, flags) + +#define irq_gc_unlock_irqrestore(gc, flags) \ + raw_spin_unlock_irqrestore(&(gc)->lock, flags) + +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 (~0UL) +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); + +#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; +#else +#define set_handle_irq(handle_irq) \ + do { \ + (void)handle_irq; \ + WARN_ON(1); \ + } while (0) +#endif + +#endif /* _LINUX_IRQ_H */ |