man/man9f/ddi_intr_get_pending.9f

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 ddi_intr_get_pending 9F "07Apr 2005" "SunOS 5.11" "Kernel Functions for Drivers"
 NAME
ddi_intr_get_pending - get pending bit for a given interrupt
 SYNOPSIS

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

int ddi_intr_get_pending(ddi_intr_handle_t h, int *pendingp);


 INTERFACE LEVEL

Solaris DDI specific (Solaris DDI).
 PARAMETERS

h

DDI interrupt handle


pendingp

Pointer to the pending capability returned for this handle


 DESCRIPTION

The ddi_intr_get_pending() function returns non-zero as the integer
pointed to by the pendingp argument if a corresponding interrupt is
pending. The corresponding interrupt handle h must already be allocated.
The call succeeds if the device or host bridge supports the ability to read the
interrupt pending bits of its interrupts. The driver should use
ddi_intr_get_cap() function to see if the DDI_INTR_FLAG_PENDING
flag is returned to indicate that interrupts support interrupt pending bits.

If the DDI_INTR_FLAG_PENDING capability is not supported,
ddi_intr_get_pending() returns DDI_ENOTSUP and zero in
pendingp.
 RETURN VALUES

The ddi_intr_get_pending() function returns:

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_pending() function 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_block_enable(9F),
ddi_intr_block_disable(9F), ddi_intr_clr_mask(9F),
ddi_intr_disable(9F), ddi_intr_enable(9F),
ddi_intr_set_mask(9F)

Writing Device Drivers
 NOTES

Any consumer of this interface should verify that the return value is not equal
to DDI_SUCCESS. Incomplete checking for failure codes could result in
inconsistent behavior among platforms.