#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 #ifndef CONFIG_S390 #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct seq_file; struct irq_desc; struct irq_data; typedef void (*irq_flow_handler_t)(unsigned int irq, struct irq_desc *desc); typedef void (*irq_preflow_handler_t)(struct irq_data *data); /* * 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_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_TRHEAD - Interrupt nests into another thread */ 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_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), }; #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) #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_data.affinity * IRQ_SET_MASK_NOCPY - OK, chip did update irq_data.affinity */ enum { IRQ_SET_MASK_OK = 0, IRQ_SET_MASK_OK_NOCOPY, }; struct msi_desc; struct irq_domain; /** * struct irq_data - per irq and irq chip data passed down to chip functions * @irq: interrupt number * @hwirq: hardware interrupt number, local to the interrupt domain * @node: node index useful for balancing * @state_use_accessors: status information for irq chip functions. * Use accessor functions to deal with it * @chip: low level interrupt hardware access * @domain: Interrupt translation domain; responsible for mapping * between hwirq number and linux irq number. * @handler_data: per-IRQ data for the irq_chip methods * @chip_data: platform-specific per-chip private data for the chip * methods, to allow shared chip implementations * @msi_desc: MSI descriptor * @affinity: IRQ affinity on SMP * * The fields here need to overlay the ones in irq_desc until we * cleaned up the direct references and switched everything over to * irq_data. */ struct irq_data { unsigned int irq; unsigned long hwirq; unsigned int node; unsigned int state_use_accessors; struct irq_chip *chip; struct irq_domain *domain; void *handler_data; void *chip_data; struct msi_desc *msi_desc; #ifdef CONFIG_SMP cpumask_var_t affinity; #endif }; /* * Bit masks for irq_data.state * * IRQD_TRIGGER_MASK - Mask for the trigger type bits * IRQD_SETAFFINITY_PENDING - Affinity setting is pending * 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 * IRDQ_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 */ enum { IRQD_TRIGGER_MASK = 0xf, IRQD_SETAFFINITY_PENDING = (1 << 8), 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), }; static inline bool irqd_is_setaffinity_pending(struct irq_data *d) { return d->state_use_accessors & IRQD_SETAFFINITY_PENDING; } static inline bool irqd_is_per_cpu(struct irq_data *d) { return d->state_use_accessors & IRQD_PER_CPU; } static inline bool irqd_can_balance(struct irq_data *d) { return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING)); } static inline bool irqd_affinity_was_set(struct irq_data *d) { return d->state_use_accessors & IRQD_AFFINITY_SET; } static inline void irqd_mark_affinity_was_set(struct irq_data *d) { d->state_use_accessors |= IRQD_AFFINITY_SET; } static inline u32 irqd_get_trigger_type(struct irq_data *d) { return d->state_use_accessors & IRQD_TRIGGER_MASK; } /* * Must only be called inside irq_chip.irq_set_type() functions. */ static inline void irqd_set_trigger_type(struct irq_data *d, u32 type) { d->state_use_accessors &= ~IRQD_TRIGGER_MASK; d->state_use_accessors |= type & IRQD_TRIGGER_MASK; } static inline bool irqd_is_level_type(struct irq_data *d) { return d->state_use_accessors & IRQD_LEVEL; } static inline bool irqd_is_wakeup_set(struct irq_data *d) { return d->state_use_accessors & IRQD_WAKEUP_STATE; } static inline bool irqd_can_move_in_process_context(struct irq_data *d) { return d->state_use_accessors & IRQD_MOVE_PCNTXT; } static inline bool irqd_irq_disabled(struct irq_data *d) { return d->state_use_accessors & IRQD_IRQ_DISABLED; } static inline bool irqd_irq_masked(struct irq_data *d) { return d->state_use_accessors & IRQD_IRQ_MASKED; } static inline bool irqd_irq_inprogress(struct irq_data *d) { return d->state_use_accessors & IRQD_IRQ_INPROGRESS; } /* * Functions for chained handlers which can be enabled/disabled by the * standard disable_irq/enable_irq calls. Must be called with * irq_desc->lock held. */ static inline void irqd_set_chained_irq_inprogress(struct irq_data *d) { d->state_use_accessors |= IRQD_IRQ_INPROGRESS; } static inline void irqd_clr_chained_irq_inprogress(struct irq_data *d) { d->state_use_accessors &= ~IRQD_IRQ_INPROGRESS; } /** * 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 * @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 * @irq_resume: function called from core code on resume once per chip * @irq_pm_shutdown: function called from core code on shutdown once per chip * @irq_print_chip: optional to print special chip info in show_interrupts * @flags: chip specific flags * * @release: release function solely used by UML */ 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); 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_print_chip)(struct irq_data *data, struct seq_file *p); unsigned long flags; /* Currently used only by UML, might disappear one day.*/ #ifdef CONFIG_IRQ_RELEASE_METHOD void (*release)(unsigned int irq, void *dev_id); #endif }; /* * 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 */ 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), }; /* This include will go away once we isolated irq_desc usage to core code */ #include /* * Pick up the arch-dependent methods: */ #include #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_irq(unsigned int irq, struct irqaction *new); extern void remove_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); #ifdef CONFIG_GENERIC_HARDIRQS #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ) void irq_move_irq(struct irq_data *data); void irq_move_masked_irq(struct irq_data *data); #else 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; /* * Built-in IRQ handlers for various IRQ types, * callable via desc->handle_irq() */ extern void handle_level_irq(unsigned int irq, struct irq_desc *desc); extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc); extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc); extern void handle_edge_eoi_irq(unsigned int irq, struct irq_desc *desc); extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc); extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc); extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc); extern void handle_nested_irq(unsigned int irq); /* Handling of unhandled and spurious interrupts: */ extern void note_interrupt(unsigned int irq, 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 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); } 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); } /* Handle dynamic irq creation and destruction */ extern unsigned int create_irq_nr(unsigned int irq_want, int node); extern int create_irq(void); extern void destroy_irq(unsigned int irq); /* * Dynamic irq helper functions. Obsolete. Use irq_alloc_desc* and * irq_free_desc instead. */ extern void dynamic_irq_cleanup(unsigned int irq); static inline void dynamic_irq_init(unsigned int irq) { dynamic_irq_cleanup(irq); } /* 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 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->handler_data : NULL; } static inline void *irq_data_get_irq_handler_data(struct irq_data *d) { return d->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->msi_desc : NULL; } static inline struct msi_desc *irq_data_get_msi(struct irq_data *d) { return d->msi_desc; } int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node, struct module *owner); static inline int irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node) { return __irq_alloc_descs(irq, from, cnt, node, THIS_MODULE); } void irq_free_descs(unsigned int irq, unsigned int cnt); int irq_reserve_irqs(unsigned int from, unsigned int cnt); static inline int irq_alloc_desc(int node) { return irq_alloc_descs(-1, 0, 1, node); } static inline int irq_alloc_desc_at(unsigned int at, int node) { return irq_alloc_descs(at, at, 1, node); } static inline int irq_alloc_desc_from(unsigned int from, int node) { return irq_alloc_descs(-1, from, 1, node); } static inline void irq_free_desc(unsigned int irq) { irq_free_descs(irq, 1); } static inline int irq_reserve_irq(unsigned int irq) { return irq_reserve_irqs(irq, 1); } #ifndef irq_reg_writel # define irq_reg_writel(val, addr) writel(val, addr) #endif #ifndef irq_reg_readl # define irq_reg_readl(addr) readl(addr) #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 * * 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; }; /** * struct irq_chip_generic - Generic irq chip data structure * @lock: Lock to protect register and cache data access * @reg_base: Register base address (virtual) * @irq_base: Interrupt base nr for this chip * @irq_cnt: Number of interrupts handled by this chip * @mask_cache: Cached mask register * @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 * @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; 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; struct list_head list; struct irq_chip_type chip_types[0]; }; /** * 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 */ enum irq_gc_flags { IRQ_GC_INIT_MASK_CACHE = 1 << 0, IRQ_GC_INIT_NESTED_LOCK = 1 << 1, }; /* 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_reg_and_ack(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 */ 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); 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 #endif /* CONFIG_GENERIC_HARDIRQS */ #endif /* !CONFIG_S390 */ #endif /* _LINUX_IRQ_H */