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![Richard Weinberger](/assets/img/avatar_default.png)
As it's only user (UML) does no longer need it we can get rid of it. Signed-off-by: Richard Weinberger <richard@nod.at> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
747 lines
23 KiB
C
747 lines
23 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 module;
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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_DEFAULT - For use by some PICs to ask irq_set_type
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* to setup the HW to a sane default (used
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* by irqdomain map() callbacks to synchronize
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* the HW state and SW flags for a newly
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* allocated descriptor).
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*
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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 irq_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_NOTHREAD - Interrupt cannot be threaded
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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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* IRQ_PER_CPU_DEVID - Dev_id is a per-cpu variable
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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_DEFAULT = IRQ_TYPE_SENSE_MASK,
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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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IRQ_NOTHREAD = (1 << 16),
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IRQ_PER_CPU_DEVID = (1 << 17),
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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 | IRQ_NOTHREAD | IRQ_PER_CPU_DEVID)
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#define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
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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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struct irq_domain;
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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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* @hwirq: hardware interrupt number, local to the interrupt domain
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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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* @domain: Interrupt translation domain; responsible for mapping
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* between hwirq number and linux irq number.
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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 long hwirq;
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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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struct irq_domain *domain;
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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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static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
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{
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return d->hwirq;
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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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* @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_suspend: function called from core code on suspend once per chip
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* @irq_resume: function called from core code on resume once per chip
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* @irq_pm_shutdown: function called from core code on shutdown once per chip
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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_suspend)(struct irq_data *data);
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void (*irq_resume)(struct irq_data *data);
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void (*irq_pm_shutdown)(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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};
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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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* IRQCHIP_SKIP_SET_WAKE: Skip chip.irq_set_wake(), for this irq chip
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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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IRQCHIP_SKIP_SET_WAKE = (1 << 4),
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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 int setup_percpu_irq(unsigned int irq, struct irqaction *new);
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extern void remove_percpu_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_percpu_devid_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 int irq_set_percpu_devid(unsigned int irq);
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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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|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/* 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)
|
|
|
|
void irq_free_descs(unsigned int irq, unsigned int cnt);
|
|
int irq_reserve_irqs(unsigned int from, unsigned int cnt);
|
|
|
|
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 */
|