forked from luck/tmp_suning_uos_patched
581 lines
17 KiB
C
581 lines
17 KiB
C
#ifndef _LINUX_IRQ_H
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#define _LINUX_IRQ_H
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/*
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* Please do not include this file in generic code. There is currently
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* no requirement for any architecture to implement anything held
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* within this file.
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*
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* Thanks. --rmk
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*/
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#include <linux/smp.h>
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#ifndef CONFIG_S390
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#include <linux/linkage.h>
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#include <linux/cache.h>
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#include <linux/spinlock.h>
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#include <linux/cpumask.h>
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#include <linux/gfp.h>
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#include <linux/irqreturn.h>
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#include <linux/irqnr.h>
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#include <linux/errno.h>
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#include <linux/topology.h>
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#include <linux/wait.h>
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#include <asm/irq.h>
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#include <asm/ptrace.h>
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#include <asm/irq_regs.h>
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struct seq_file;
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struct irq_desc;
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struct irq_data;
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typedef void (*irq_flow_handler_t)(unsigned int irq,
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struct irq_desc *desc);
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typedef void (*irq_preflow_handler_t)(struct irq_data *data);
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/*
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* IRQ line status.
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*
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* Bits 0-7 are the same as the IRQF_* bits in linux/interrupt.h
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*
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* IRQ_TYPE_NONE - default, unspecified type
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* IRQ_TYPE_EDGE_RISING - rising edge triggered
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* IRQ_TYPE_EDGE_FALLING - falling edge triggered
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* IRQ_TYPE_EDGE_BOTH - rising and falling edge triggered
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* IRQ_TYPE_LEVEL_HIGH - high level triggered
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* IRQ_TYPE_LEVEL_LOW - low level triggered
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* IRQ_TYPE_LEVEL_MASK - Mask to filter out the level bits
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* IRQ_TYPE_SENSE_MASK - Mask for all the above bits
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* IRQ_TYPE_PROBE - Special flag for probing in progress
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*
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* Bits which can be modified via irq_set/clear/modify_status_flags()
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* IRQ_LEVEL - Interrupt is level type. Will be also
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* updated in the code when the above trigger
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* bits are modified via set_irq_type()
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* IRQ_PER_CPU - Mark an interrupt PER_CPU. Will protect
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* it from affinity setting
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* IRQ_NOPROBE - Interrupt cannot be probed by autoprobing
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* IRQ_NOREQUEST - Interrupt cannot be requested via
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* request_irq()
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* IRQ_NOAUTOEN - Interrupt is not automatically enabled in
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* request/setup_irq()
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* IRQ_NO_BALANCING - Interrupt cannot be balanced (affinity set)
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* IRQ_MOVE_PCNTXT - Interrupt can be migrated from process context
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* IRQ_NESTED_TRHEAD - Interrupt nests into another thread
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*/
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enum {
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IRQ_TYPE_NONE = 0x00000000,
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IRQ_TYPE_EDGE_RISING = 0x00000001,
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IRQ_TYPE_EDGE_FALLING = 0x00000002,
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IRQ_TYPE_EDGE_BOTH = (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING),
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IRQ_TYPE_LEVEL_HIGH = 0x00000004,
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IRQ_TYPE_LEVEL_LOW = 0x00000008,
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IRQ_TYPE_LEVEL_MASK = (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH),
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IRQ_TYPE_SENSE_MASK = 0x0000000f,
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IRQ_TYPE_PROBE = 0x00000010,
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IRQ_LEVEL = (1 << 8),
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IRQ_PER_CPU = (1 << 9),
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IRQ_NOPROBE = (1 << 10),
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IRQ_NOREQUEST = (1 << 11),
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IRQ_NOAUTOEN = (1 << 12),
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IRQ_NO_BALANCING = (1 << 13),
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IRQ_MOVE_PCNTXT = (1 << 14),
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IRQ_NESTED_THREAD = (1 << 15),
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};
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#define IRQF_MODIFY_MASK \
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(IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \
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IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \
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IRQ_PER_CPU | IRQ_NESTED_THREAD)
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#define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
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static inline __deprecated bool CHECK_IRQ_PER_CPU(unsigned int status)
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{
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return status & IRQ_PER_CPU;
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}
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/*
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* Return value for chip->irq_set_affinity()
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*
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* IRQ_SET_MASK_OK - OK, core updates irq_data.affinity
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* IRQ_SET_MASK_NOCPY - OK, chip did update irq_data.affinity
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*/
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enum {
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IRQ_SET_MASK_OK = 0,
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IRQ_SET_MASK_OK_NOCOPY,
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};
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struct msi_desc;
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/**
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* struct irq_data - per irq and irq chip data passed down to chip functions
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* @irq: interrupt number
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* @node: node index useful for balancing
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* @state_use_accessors: status information for irq chip functions.
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* Use accessor functions to deal with it
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* @chip: low level interrupt hardware access
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* @handler_data: per-IRQ data for the irq_chip methods
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* @chip_data: platform-specific per-chip private data for the chip
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* methods, to allow shared chip implementations
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* @msi_desc: MSI descriptor
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* @affinity: IRQ affinity on SMP
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*
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* The fields here need to overlay the ones in irq_desc until we
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* cleaned up the direct references and switched everything over to
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* irq_data.
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*/
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struct irq_data {
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unsigned int irq;
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unsigned int node;
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unsigned int state_use_accessors;
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struct irq_chip *chip;
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void *handler_data;
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void *chip_data;
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struct msi_desc *msi_desc;
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#ifdef CONFIG_SMP
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cpumask_var_t affinity;
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#endif
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};
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/*
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* Bit masks for irq_data.state
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*
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* IRQD_TRIGGER_MASK - Mask for the trigger type bits
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* IRQD_SETAFFINITY_PENDING - Affinity setting is pending
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* IRQD_NO_BALANCING - Balancing disabled for this IRQ
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* IRQD_PER_CPU - Interrupt is per cpu
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* IRQD_AFFINITY_SET - Interrupt affinity was set
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* IRQD_LEVEL - Interrupt is level triggered
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* IRQD_WAKEUP_STATE - Interrupt is configured for wakeup
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* from suspend
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* IRDQ_MOVE_PCNTXT - Interrupt can be moved in process
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* context
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* IRQD_IRQ_DISABLED - Disabled state of the interrupt
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* IRQD_IRQ_MASKED - Masked state of the interrupt
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* IRQD_IRQ_INPROGRESS - In progress state of the interrupt
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*/
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enum {
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IRQD_TRIGGER_MASK = 0xf,
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IRQD_SETAFFINITY_PENDING = (1 << 8),
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IRQD_NO_BALANCING = (1 << 10),
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IRQD_PER_CPU = (1 << 11),
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IRQD_AFFINITY_SET = (1 << 12),
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IRQD_LEVEL = (1 << 13),
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IRQD_WAKEUP_STATE = (1 << 14),
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IRQD_MOVE_PCNTXT = (1 << 15),
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IRQD_IRQ_DISABLED = (1 << 16),
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IRQD_IRQ_MASKED = (1 << 17),
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IRQD_IRQ_INPROGRESS = (1 << 18),
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};
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static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
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{
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return d->state_use_accessors & IRQD_SETAFFINITY_PENDING;
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}
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static inline bool irqd_is_per_cpu(struct irq_data *d)
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{
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return d->state_use_accessors & IRQD_PER_CPU;
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}
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static inline bool irqd_can_balance(struct irq_data *d)
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{
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return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING));
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}
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static inline bool irqd_affinity_was_set(struct irq_data *d)
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{
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return d->state_use_accessors & IRQD_AFFINITY_SET;
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}
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static inline void irqd_mark_affinity_was_set(struct irq_data *d)
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{
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d->state_use_accessors |= IRQD_AFFINITY_SET;
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}
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static inline u32 irqd_get_trigger_type(struct irq_data *d)
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{
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return d->state_use_accessors & IRQD_TRIGGER_MASK;
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}
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/*
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* Must only be called inside irq_chip.irq_set_type() functions.
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*/
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static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)
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{
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d->state_use_accessors &= ~IRQD_TRIGGER_MASK;
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d->state_use_accessors |= type & IRQD_TRIGGER_MASK;
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}
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static inline bool irqd_is_level_type(struct irq_data *d)
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{
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return d->state_use_accessors & IRQD_LEVEL;
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}
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static inline bool irqd_is_wakeup_set(struct irq_data *d)
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{
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return d->state_use_accessors & IRQD_WAKEUP_STATE;
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}
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static inline bool irqd_can_move_in_process_context(struct irq_data *d)
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{
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return d->state_use_accessors & IRQD_MOVE_PCNTXT;
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}
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static inline bool irqd_irq_disabled(struct irq_data *d)
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{
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return d->state_use_accessors & IRQD_IRQ_DISABLED;
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}
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static inline bool irqd_irq_masked(struct irq_data *d)
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{
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return d->state_use_accessors & IRQD_IRQ_MASKED;
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}
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static inline bool irqd_irq_inprogress(struct irq_data *d)
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{
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return d->state_use_accessors & IRQD_IRQ_INPROGRESS;
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}
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/*
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* Functions for chained handlers which can be enabled/disabled by the
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* standard disable_irq/enable_irq calls. Must be called with
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* irq_desc->lock held.
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*/
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static inline void irqd_set_chained_irq_inprogress(struct irq_data *d)
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{
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d->state_use_accessors |= IRQD_IRQ_INPROGRESS;
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}
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static inline void irqd_clr_chained_irq_inprogress(struct irq_data *d)
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{
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d->state_use_accessors &= ~IRQD_IRQ_INPROGRESS;
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}
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/**
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* struct irq_chip - hardware interrupt chip descriptor
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*
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* @name: name for /proc/interrupts
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* @startup: deprecated, replaced by irq_startup
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* @shutdown: deprecated, replaced by irq_shutdown
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* @enable: deprecated, replaced by irq_enable
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* @disable: deprecated, replaced by irq_disable
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* @ack: deprecated, replaced by irq_ack
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* @mask: deprecated, replaced by irq_mask
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* @mask_ack: deprecated, replaced by irq_mask_ack
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* @unmask: deprecated, replaced by irq_unmask
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* @eoi: deprecated, replaced by irq_eoi
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* @end: deprecated, will go away with __do_IRQ()
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* @set_affinity: deprecated, replaced by irq_set_affinity
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* @retrigger: deprecated, replaced by irq_retrigger
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* @set_type: deprecated, replaced by irq_set_type
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* @set_wake: deprecated, replaced by irq_wake
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* @bus_lock: deprecated, replaced by irq_bus_lock
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* @bus_sync_unlock: deprecated, replaced by irq_bus_sync_unlock
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*
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* @irq_startup: start up the interrupt (defaults to ->enable if NULL)
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* @irq_shutdown: shut down the interrupt (defaults to ->disable if NULL)
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* @irq_enable: enable the interrupt (defaults to chip->unmask if NULL)
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* @irq_disable: disable the interrupt
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* @irq_ack: start of a new interrupt
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* @irq_mask: mask an interrupt source
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* @irq_mask_ack: ack and mask an interrupt source
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* @irq_unmask: unmask an interrupt source
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* @irq_eoi: end of interrupt
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* @irq_set_affinity: set the CPU affinity on SMP machines
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* @irq_retrigger: resend an IRQ to the CPU
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* @irq_set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
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* @irq_set_wake: enable/disable power-management wake-on of an IRQ
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* @irq_bus_lock: function to lock access to slow bus (i2c) chips
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* @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
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* @irq_cpu_online: configure an interrupt source for a secondary CPU
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* @irq_cpu_offline: un-configure an interrupt source for a secondary CPU
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* @irq_print_chip: optional to print special chip info in show_interrupts
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* @flags: chip specific flags
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*
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* @release: release function solely used by UML
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*/
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struct irq_chip {
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const char *name;
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unsigned int (*irq_startup)(struct irq_data *data);
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void (*irq_shutdown)(struct irq_data *data);
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void (*irq_enable)(struct irq_data *data);
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void (*irq_disable)(struct irq_data *data);
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void (*irq_ack)(struct irq_data *data);
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void (*irq_mask)(struct irq_data *data);
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void (*irq_mask_ack)(struct irq_data *data);
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void (*irq_unmask)(struct irq_data *data);
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void (*irq_eoi)(struct irq_data *data);
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int (*irq_set_affinity)(struct irq_data *data, const struct cpumask *dest, bool force);
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int (*irq_retrigger)(struct irq_data *data);
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int (*irq_set_type)(struct irq_data *data, unsigned int flow_type);
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int (*irq_set_wake)(struct irq_data *data, unsigned int on);
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void (*irq_bus_lock)(struct irq_data *data);
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void (*irq_bus_sync_unlock)(struct irq_data *data);
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void (*irq_cpu_online)(struct irq_data *data);
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void (*irq_cpu_offline)(struct irq_data *data);
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void (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
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unsigned long flags;
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/* Currently used only by UML, might disappear one day.*/
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#ifdef CONFIG_IRQ_RELEASE_METHOD
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void (*release)(unsigned int irq, void *dev_id);
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#endif
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};
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/*
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* irq_chip specific flags
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*
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* IRQCHIP_SET_TYPE_MASKED: Mask before calling chip.irq_set_type()
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* IRQCHIP_EOI_IF_HANDLED: Only issue irq_eoi() when irq was handled
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* IRQCHIP_MASK_ON_SUSPEND: Mask non wake irqs in the suspend path
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* IRQCHIP_ONOFFLINE_ENABLED: Only call irq_on/off_line callbacks
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* when irq enabled
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*/
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enum {
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IRQCHIP_SET_TYPE_MASKED = (1 << 0),
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IRQCHIP_EOI_IF_HANDLED = (1 << 1),
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IRQCHIP_MASK_ON_SUSPEND = (1 << 2),
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IRQCHIP_ONOFFLINE_ENABLED = (1 << 3),
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};
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/* This include will go away once we isolated irq_desc usage to core code */
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#include <linux/irqdesc.h>
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/*
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* Pick up the arch-dependent methods:
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*/
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#include <asm/hw_irq.h>
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#ifndef NR_IRQS_LEGACY
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# define NR_IRQS_LEGACY 0
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#endif
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#ifndef ARCH_IRQ_INIT_FLAGS
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# define ARCH_IRQ_INIT_FLAGS 0
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#endif
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#define IRQ_DEFAULT_INIT_FLAGS ARCH_IRQ_INIT_FLAGS
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struct irqaction;
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extern int setup_irq(unsigned int irq, struct irqaction *new);
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extern void remove_irq(unsigned int irq, struct irqaction *act);
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extern void irq_cpu_online(void);
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extern void irq_cpu_offline(void);
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extern int __irq_set_affinity_locked(struct irq_data *data, const struct cpumask *cpumask);
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#ifdef CONFIG_GENERIC_HARDIRQS
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#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
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void irq_move_irq(struct irq_data *data);
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void irq_move_masked_irq(struct irq_data *data);
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#else
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static inline void irq_move_irq(struct irq_data *data) { }
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static inline void irq_move_masked_irq(struct irq_data *data) { }
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#endif
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extern int no_irq_affinity;
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/*
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* Built-in IRQ handlers for various IRQ types,
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* callable via desc->handle_irq()
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*/
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extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_edge_eoi_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
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extern void handle_nested_irq(unsigned int irq);
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/* Handling of unhandled and spurious interrupts: */
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extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
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irqreturn_t action_ret);
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/* Enable/disable irq debugging output: */
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extern int noirqdebug_setup(char *str);
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/* Checks whether the interrupt can be requested by request_irq(): */
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extern int can_request_irq(unsigned int irq, unsigned long irqflags);
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/* Dummy irq-chip implementations: */
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extern struct irq_chip no_irq_chip;
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extern struct irq_chip dummy_irq_chip;
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extern void
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irq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
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irq_flow_handler_t handle, const char *name);
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static inline void irq_set_chip_and_handler(unsigned int irq, struct irq_chip *chip,
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irq_flow_handler_t handle)
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{
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irq_set_chip_and_handler_name(irq, chip, handle, NULL);
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}
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extern void
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__irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
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const char *name);
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static inline void
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irq_set_handler(unsigned int irq, irq_flow_handler_t handle)
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{
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__irq_set_handler(irq, handle, 0, NULL);
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}
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/*
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* Set a highlevel chained flow handler for a given IRQ.
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* (a chained handler is automatically enabled and set to
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* IRQ_NOREQUEST and IRQ_NOPROBE)
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*/
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static inline void
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irq_set_chained_handler(unsigned int irq, irq_flow_handler_t handle)
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{
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__irq_set_handler(irq, handle, 1, NULL);
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}
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void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set);
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static inline void irq_set_status_flags(unsigned int irq, unsigned long set)
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{
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irq_modify_status(irq, 0, set);
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}
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static inline void irq_clear_status_flags(unsigned int irq, unsigned long clr)
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{
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irq_modify_status(irq, clr, 0);
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}
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static inline void irq_set_noprobe(unsigned int irq)
|
|
{
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|
irq_modify_status(irq, 0, IRQ_NOPROBE);
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|
}
|
|
|
|
static inline void irq_set_probe(unsigned int irq)
|
|
{
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|
irq_modify_status(irq, IRQ_NOPROBE, 0);
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|
}
|
|
|
|
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);
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|
}
|
|
|
|
/* Handle dynamic irq creation and destruction */
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|
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);
|
|
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 */
|