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

ddi_intr_get_pri, ddi_intr_set_pri - get or set priority of a given interrupt

#include <sys/types.h>
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
int ddi_intr_get_pri(ddi_intr_handle_t h, uint_t *prip);

int ddi_intr_set_pri(ddi_intr_handle_t h, uint_t pri);

illumos DDI specific (illumos DDI).



DDI interrupt handle


Pointer to the priority returned for this handle



DDI interrupt handle


Contains the priority to be set

The ddi_intr_get_pri() function returns the current priority of the interrupt handle h of a given device. Upon a successful return, prip points to a small integer value, typically in the DDI_INTR_PRI_MIN...DDI_INTR_PRI_MAX range, that represents the current software priority setting for the interrupt. See <sys/ddi_intr.h> for values of DDI_INTR_PRI_MIN or DDI_INTR_PRI_MAX.

The ddi_intr_get_pri() function can be called any time, even if the driver adds an interrupt handler for the interrupt specification.

The software priority returned from ddi_intr_get_pri() can be used in calls to mutex_init() and rw_init().

The ddi_intr_set_pri() function sets the priority pri of the interrupt handle h of a given device. The function validates that the argument is within the supported range.

The ddi_intr_set_pri() function can only be called prior to adding the interrupt handler or when an interrupt handler is unassigned. DDI_FAILURE is returned in all other cases.

The ddi_intr_get_pri() and ddi_intr_set_pri() functions return:


On success.


On encountering invalid input parameters.


On any implementation specific failure.


On device not supporting operation.

The ddi_intr_get_pri() and ddi_intr_set_pri() functions can be called from kernel non-interrupt context.

See attributes(7) for descriptions of the following attributes:

Interface Stability Committed

attributes(7), ddi_intr_alloc(9F), ddi_intr_enable(9F), mutex_init(9F), rw_init(9F)

Writing Device Drivers

The priority returned from ddi_intr_get_pri() should be typecast by calling the DDI_INTR_PRI macro before passing it onto mutex_init(9F).

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.

June 4, 2007 OmniOS