ddi_intr_get_pri(9F)													      ddi_intr_get_pri(9F)

NAME

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

SYNOPSIS

       #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, int *prip);

       int ddi_intr_set_pri(ddi_intr_handle_t h, int pri);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

       ddi_intr_get_pri()

       h	       DDI interrupt handle

       prip	       Pointer to the priority returned for this handle

       ddi_intr_set_pri()

       h	       DDI interrupt handle

       pri	       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:

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

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

       attributes(5), ddi_intr_alloc(9F), ddi_intr_enable(9F), mutex_init(9F), rw_init(9F)

       The  priority  returned from ddi_intr_get_pri() should be typecast to (void *)(uint64_t) before passing it on to mutex_init(9F). The double
       typecast is needed for AMD64 compilation.

       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.

								    20 Apr 2005 					      ddi_intr_get_pri(9F)