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STRUCT IRQ_DATA(9) Structures STRUCT IRQ_DATA(9)

NAME

struct_irq_data - per irq and irq chip data passed down to chip functions

SYNOPSIS

struct irq_data {
  u32 mask;
  unsigned int irq;
  unsigned long hwirq;
  unsigned int node;
  unsigned int state_use_accessors;
  struct irq_chip * chip;
  struct irq_domain * domain;
  void * handler_data;
  void * chip_data;
  struct msi_desc * msi_desc;
  cpumask_var_t affinity;
};

MEMBERS

mask
precomputed bitmask for accessing the chip registers
irq
interrupt number
hwirq
hardware interrupt number, local to the interrupt domain
node
node index useful for balancing
state_use_accessors
status information for irq chip functions. Use accessor functions to deal with it
chip
low level interrupt hardware access
domain
Interrupt translation domain; responsible for mapping between hwirq number and linux irq number.
handler_data
per-IRQ data for the irq_chip methods
chip_data
platform-specific per-chip private data for the chip methods, to allow shared chip implementations
msi_desc
MSI descriptor
affinity
IRQ affinity on SMP

DESCRIPTION

The fields here need to overlay the ones in irq_desc until we cleaned up the direct references and switched everything over to irq_data.

AUTHORS

Thomas Gleixner <tglx@linutronix.de>
Author.
Ingo Molnar <mingo@elte.hu>
Author.

COPYRIGHT

May 2018 Kernel Hackers Manual 3.16