#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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct seq_file; struct module; struct msi_msg; 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_AFFINITY_MANAGED - Affinity is auto-managed by the kernel */ 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_AFFINITY_MANAGED = (1 << 21), }; #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_AFFINITY_MANAGED) #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 descendent 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 * @msi_desc: MSI descriptor */ struct irq_common_data { unsigned int state_use_accessors; #ifdef CONFIG_NUMA unsigned int node; #endif void *handler_data; struct msi_desc *msi_desc; cpumask_var_t affinity; }; /** * 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_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 * 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 */ 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), IRQD_WAKEUP_ARMED = (1 << 19), IRQD_FORWARDED_TO_VCPU = (1 << 20), IRQD_AFFINITY_MANAGED = (1 << 21), }; #define __irqd_to_state(d) ((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 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. */ 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; } static inline bool irqd_is_level_type(struct irq_data *d) { return __irqd_to_state(d) & IRQD_LEVEL; } 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 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 * @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 * @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); 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); 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 */ 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), }; #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 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); extern void irq_migrate_all_off_this_cpu(void); #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; #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 bool handle_level_irq(struct irq_desc *desc); extern bool handle_fasteoi_irq(struct irq_desc *desc); extern bool handle_edge_irq(struct irq_desc *desc); extern bool handle_edge_eoi_irq(struct irq_desc *desc); extern bool handle_simple_irq(struct irq_desc *desc); extern bool handle_percpu_irq(struct irq_desc *desc); extern bool handle_percpu_devid_irq(struct irq_desc *desc); extern bool handle_bad_irq(struct irq_desc *desc); extern bool handle_nested_irq(unsigned int irq); extern int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg); #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 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_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); #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 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; } 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); /* 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) #define irq_alloc_desc(node) \ irq_alloc_descs(-1, 0, 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) 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[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 * @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[0]; }; /* 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 */ 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 *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); 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); } #endif /* _LINUX_IRQ_H */