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 DDI_INTR_GET_PRI 9F "Jun 04, 2007"
 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
illumos DDI specific (illumos 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(7) for descriptions of the following attributes:






ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability Committed



 SEE ALSO
 attributes (7),  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.