#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/smp.h> #ifndef CONFIG_S390 #include <linux/linkage.h> #include <linux/cache.h> #include <linux/spinlock.h> #include <linux/cpumask.h> #include <linux/gfp.h> #include <linux/irqreturn.h> #include <linux/irqnr.h> #include <linux/errno.h> #include <linux/topology.h> #include <linux/wait.h> #include <asm/irq.h> #include <asm/ptrace.h> #include <asm/irq_regs.h> struct irq_desc; typedef void (*irq_flow_handler_t)(unsigned int irq, struct irq_desc *desc); /* * IRQ line status. * * Bits 0-7 are reserved for the IRQF_* bits in linux/interrupt.h * * IRQ types */ #define IRQ_TYPE_NONE 0x00000000 /* Default, unspecified type */ #define IRQ_TYPE_EDGE_RISING 0x00000001 /* Edge rising type */ #define IRQ_TYPE_EDGE_FALLING 0x00000002 /* Edge falling type */ #define IRQ_TYPE_EDGE_BOTH (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING) #define IRQ_TYPE_LEVEL_HIGH 0x00000004 /* Level high type */ #define IRQ_TYPE_LEVEL_LOW 0x00000008 /* Level low type */ #define IRQ_TYPE_SENSE_MASK 0x0000000f /* Mask of the above */ #define IRQ_TYPE_PROBE 0x00000010 /* Probing in progress */ /* Internal flags */ #define IRQ_INPROGRESS 0x00000100 /* IRQ handler active - do not enter! */ #define IRQ_DISABLED 0x00000200 /* IRQ disabled - do not enter! */ #define IRQ_PENDING 0x00000400 /* IRQ pending - replay on enable */ #define IRQ_REPLAY 0x00000800 /* IRQ has been replayed but not acked yet */ #define IRQ_AUTODETECT 0x00001000 /* IRQ is being autodetected */ #define IRQ_WAITING 0x00002000 /* IRQ not yet seen - for autodetection */ #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ #define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */ #define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */ #define IRQ_NOPROBE 0x00020000 /* IRQ is not valid for probing */ #define IRQ_NOREQUEST 0x00040000 /* IRQ cannot be requested */ #define IRQ_NOAUTOEN 0x00080000 /* IRQ will not be enabled on request irq */ #define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */ #define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */ #define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */ #define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */ #define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ #define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/ #define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */ #define IRQ_ONESHOT 0x08000000 /* IRQ is not unmasked after hardirq */ #define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */ #define IRQF_MODIFY_MASK \ (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \ IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL) #ifdef CONFIG_IRQ_PER_CPU # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU) # define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING) #else # define CHECK_IRQ_PER_CPU(var) 0 # define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING #endif struct msi_desc; /** * struct irq_data - per irq and irq chip data passed down to chip functions * @irq: interrupt number * @node: node index useful for balancing * @chip: low level interrupt hardware access * @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 int node; struct irq_chip *chip; void *handler_data; void *chip_data; struct msi_desc *msi_desc; #ifdef CONFIG_SMP cpumask_var_t affinity; #endif }; /** * struct irq_chip - hardware interrupt chip descriptor * * @name: name for /proc/interrupts * @startup: deprecated, replaced by irq_startup * @shutdown: deprecated, replaced by irq_shutdown * @enable: deprecated, replaced by irq_enable * @disable: deprecated, replaced by irq_disable * @ack: deprecated, replaced by irq_ack * @mask: deprecated, replaced by irq_mask * @mask_ack: deprecated, replaced by irq_mask_ack * @unmask: deprecated, replaced by irq_unmask * @eoi: deprecated, replaced by irq_eoi * @end: deprecated, will go away with __do_IRQ() * @set_affinity: deprecated, replaced by irq_set_affinity * @retrigger: deprecated, replaced by irq_retrigger * @set_type: deprecated, replaced by irq_set_type * @set_wake: deprecated, replaced by irq_wake * @bus_lock: deprecated, replaced by irq_bus_lock * @bus_sync_unlock: deprecated, replaced by irq_bus_sync_unlock * * @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 * * @release: release function solely used by UML */ struct irq_chip { const char *name; #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED unsigned int (*startup)(unsigned int irq); void (*shutdown)(unsigned int irq); void (*enable)(unsigned int irq); void (*disable)(unsigned int irq); void (*ack)(unsigned int irq); void (*mask)(unsigned int irq); void (*mask_ack)(unsigned int irq); void (*unmask)(unsigned int irq); void (*eoi)(unsigned int irq); void (*end)(unsigned int irq); int (*set_affinity)(unsigned int irq, const struct cpumask *dest); int (*retrigger)(unsigned int irq); int (*set_type)(unsigned int irq, unsigned int flow_type); int (*set_wake)(unsigned int irq, unsigned int on); void (*bus_lock)(unsigned int irq); void (*bus_sync_unlock)(unsigned int irq); #endif 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); /* Currently used only by UML, might disappear one day.*/ #ifdef CONFIG_IRQ_RELEASE_METHOD void (*release)(unsigned int irq, void *dev_id); #endif }; /* This include will go away once we isolated irq_desc usage to core code */ #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 (IRQ_DISABLED | 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); #ifdef CONFIG_GENERIC_HARDIRQS #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ) void move_native_irq(int irq); void move_masked_irq(int irq); #else static inline void move_native_irq(int irq) { } static inline void move_masked_irq(int irq) { } #endif extern int no_irq_affinity; /* Handle irq action chains: */ extern irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action); /* * 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_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 set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip, irq_flow_handler_t handle); extern void set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip, irq_flow_handler_t handle, const char *name); extern void __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, const char *name); /* * Set a highlevel flow handler for a given IRQ: */ static inline void set_irq_handler(unsigned int irq, irq_flow_handler_t handle) { __set_irq_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 and IRQ_NOPROBE) */ static inline void set_irq_chained_handler(unsigned int irq, irq_flow_handler_t handle) { __set_irq_handler(irq, handle, 1, NULL); } extern void set_irq_nested_thread(unsigned int irq, int nest); 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 set_irq_noprobe(unsigned int irq) { irq_modify_status(irq, 0, IRQ_NOPROBE); } static inline void set_irq_probe(unsigned int irq) { irq_modify_status(irq, IRQ_NOPROBE, 0); } /* 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 set_irq_chip(unsigned int irq, struct irq_chip *chip); extern int set_irq_data(unsigned int irq, void *data); extern int set_irq_chip_data(unsigned int irq, void *data); extern int set_irq_type(unsigned int irq, unsigned int type); extern int set_irq_msi(unsigned int irq, struct msi_desc *entry); extern struct irq_data *irq_get_irq_data(unsigned int irq); static inline struct irq_chip *get_irq_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 *get_irq_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 *get_irq_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_data(struct irq_data *d) { return d->handler_data; } static inline struct msi_desc *get_irq_msi(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); 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); } #endif /* CONFIG_GENERIC_HARDIRQS */ #endif /* !CONFIG_S390 */ #endif /* _LINUX_IRQ_H */