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STRUCT IRQ_CHIP_GENE(9) Structures STRUCT IRQ_CHIP_GENE(9)

NAME

struct_irq_chip_generic - Generic irq chip data structure

SYNOPSIS

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];
};

MEMBERS

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[0]

Array of interrupt irq_chip_types

DESCRIPTION

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.

AUTHORS

Thomas Gleixner <tglx@linutronix.de>

Author.

Ingo Molnar <mingo@elte.hu>

Author.

COPYRIGHT

June 2023 Kernel Hackers Manual 3.10