centos man page for struct_irq_data

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 {
	 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
       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
Kernel Hackers Manual 3.10					     June 2014							STRUCT IRQ_DATA(9)