opensolaris man page for ddi_intr_get_pri

ddi_intr_get_pri(9F)					   Kernel Functions for Drivers 				      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, uint_t *prip);

       int ddi_intr_set_pri(ddi_intr_handle_t h, uint_t pri);

INTERFACE LEVEL
       Solaris DDI specific (Solaris DDI).

PARAMETERS
       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

DESCRIPTION
       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.

RETURN VALUES
       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.

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

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

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

       Writing Device Drivers

NOTES
       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.

SunOS 5.11							    04 Jun 2007 					      ddi_intr_get_pri(9F)