Content-type: text/html Man page of ddi_intr_get_cap

ddi_intr_get_cap

Section: Kernel Functions for Drivers (9F)
Updated: 20 Apr 2005
Index Return to Main Contents
 

NAME

ddi_intr_get_cap, ddi_intr_set_cap - get or set interrupt capabilities for a given interrupt type  

SYNOPSIS

#include <sys/types.h>
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>

int ddi_intr_get_cap(ddi_intr_handle_t h, int *flagsp);

int ddi_intr_set_cap(ddi_intr_handle_t h, int flags);

 

INTERFACE LEVEL

Solaris DDI specific (Solaris DDI).  

PARAMETERS

ddi_intr_get_cap()

h

DDI interrupt handle

flagsp

Pointer to the capability flags returned for this handle

ddi_intr_set_cap()

h

DDI interrupt handle

flags

Contains the capability flag to be set

 

DESCRIPTION

The ddi_intr_get_cap() function returns the interrupt capability flags for the interrupt handle h. Upon a successful return, the flags are returned in the integer pointed to by the flagsp argument.

These flags are typically combinations of the following:

DDI_INTR_FLAG_EDGE

For discrete interrupts, the host supports edge type of trigger. This flag is not returned for DDI_INTR_TYPE_MSI or DDI_INTR_TYPE_MSIX interrupt types. This is a read-write (RW) flag.

DDI_INTR_FLAG_LEVEL

For discrete interrupts the host supports level, edge, or both types of triggers. This flag is not returned for DDI_INTR_TYPE_MSI or DDI_INTR_TYPE_MSIX interrupt types.

DDI_INTR_FLAG_MASKABLE

The interrupt can be masked either by the device or by the host bridge, or optionally by the host. This is a read-only (RO) flag.

DDI_INTR_FLAG_PENDING

The interrupt supports an interrupt pending bit. This is a read-only (RO) flag.

DDI_INTR_FLAG_BLOCK

All interrupts of the given type must be block-enabled and are not individually maskable. This is a read-only (RO) flag.

The ddi_intr_set_cap() function allows a driver to specify the capability flags for the interrupt handle h. Only DDI_INTR_FLAG_LEVEL and DDI_INTR_FLAG_EDGE flags can be set. Some devices can support both level and edge capability and either can be set by using the ddi_intr_set_cap() function. Setting the capability flags is device and platform dependent.

The ddi_intr_set_cap() function can be called after interrupts are allocated and prior to adding the interrupt handler. For all other times it returns failure.  

RETURN VALUES

The ddi_intr_get_cap() and ddi_intr_set_cap() functions return:

DDI_SUCCESS

On success.

DDI_EINVAL

On encountering invalid input parameters.

DDI_FAILURE

On any implementation specific failure.

DDI_ENOTSUP

On device not supporting operation.

 

CONTEXT

The ddi_intr_get_cap() and ddi_intr_set_cap() functions can be called from either user or kernel non-interrupt context.  

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE

Interface StabilityEvolving

 

SEE ALSO

attributes(5), ddi_intr_alloc(9F), ddi_intr_block_enable(9F), ddi_intr_get_nintrs(9F), ddi_intr_get_pending(9F), ddi_intr_get_supported_types(9F), ddi_intr_set_mask(9F)


   

NOTES

Consumers of these interfaces should verify that the return value is not equal to DDI_SUCCESS. Incomplete checking for failure codes could result in inconsistent behavior among platforms.


 

Index

NAME
SYNOPSIS
INTERFACE LEVEL
PARAMETERS
DESCRIPTION
RETURN VALUES
CONTEXT
ATTRIBUTES
SEE ALSO
NOTES

This document was created by man2html, using the manual pages.
Time: 02:39:45 GMT, October 02, 2010