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 DDI_INTR_SET_MASK 9F "Apr 05, 2006"
 NAME
ddi_intr_set_mask, ddi_intr_clr_mask - set or clear mask for a given interrupt

 SYNOPSIS


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

int ddi_intr_set_mask(ddi_intr_handle_t h);






int ddi_intr_clr_mask(ddi_intr_handle_t h);




 INTERFACE LEVEL

Solaris DDI specific (Solaris DDI).

 PARAMETERS
h


DDI interrupt handle




 DESCRIPTION

The ddi_intr_set_mask() function masks the given interrupt pointed to by
the device's interrupt handle h if the device or host bridge supports the
masking operation. The ddi_intr_get_cap() function returns the RO
flag DDI_INTR_FLAG_MASKABLE if the device or host bridge supports
interrupt mask bits for the given interrupt type. In flight interrupts can
still be taken and delivered to the driver.


The ddi_intr_clr_mask() function unmasks the given interrupt pointed by
the device's interrupt handle h if the device or host bridge supports the
masking operation.


The ddi_intr_set_mask() and ddi_intr_clr_mask() functions should be
called only if an interrupt is enabled. Otherwise the framework will return
DDI_EINVAL to such calls.


The mask cannot be cleared directly if the OS implementation has also
temporarily masked the interrupt. A call to ddi_intr_clr_mask() must be
preceded by a call to ddi_intr_set_mask(). It is not necessary to call
ddi_intr_clr_mask() when adding and enabling the interrupt.

 RETURN VALUES

The ddi_intr_set_mask() and ddi_intr_clr_mask() functions return:
DDI_SUCCESS


On success.



DDI_EINVAL


On encountering invalid input parameters or when an interrupt is not enabled.



DDI_FAILURE


On any implementation specific failure.



DDI_ENOTSUP


On device not supporting operation.




 CONTEXT

The ddi_intr_set_mask() and ddi_intr_clr_mask() functions can be
called from any context.

 ATTRIBUTES

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






ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability Committed



 SEE ALSO

attributes(5), ddi_intr_block_disable(9F),
ddi_intr_block_enable(9F), ddi_intr_disable(9F),
ddi_intr_enable(9F), ddi_intr_get_pending(9F)


Writing Device Drivers

 NOTES

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.