DDI_DEV_NREGS(9F) Kernel Functions for Drivers DDI_DEV_NREGS(9F)

NAME

ddi_dev_nregs - return the number of register sets a device has

SYNOPSIS

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


int ddi_dev_nregs(dev_info_t *dip, int *resultp);

INTERFACE LEVEL

illumos DDI specific (illumos DDI).

PARAMETERS

dip
A pointer to the device's dev_info structure.


resultp
Pointer to an integer that holds the number of register
sets on return.

DESCRIPTION

The ddi_dev_nregs() function returns the number of sets of registers
the device has.

RETURN VALUES

The ddi_dev_nregs() function returns:

DDI_SUCCESS
A successful return. The number of register sets is
returned in resultp.


DDI_FAILURE
The device has no registers.

CONTEXT

The ddi_dev_nregs() function can be called from user, interrupt, or
kernel context.

SEE ALSO

ddi_dev_nintrs(9F), ddi_dev_regsize(9F)


Writing Device Drivers

January 16, 2006 DDI_DEV_NREGS(9F)