kstat_intr(9s) [sunos man page]

kstat_intr(9S)						    Data Structures for Drivers 					    kstat_intr(9S)

NAME

       kstat_intr - structure for interrupt kstats

SYNOPSIS

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

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI)

DESCRIPTION

       Interrupt statistics are kept in the kstat_intr structure. When kstat_create(9F) creates an interrupt kstat, the ks_data field is a pointer
       to one of these structures. The macro KSTAT_INTR_PTR() is provided to retrieve this field. It looks like this:

       #define KSTAT_INTR_PTR(kptr)  ((kstat_intr_t *)(kptr)->ks_data)

       An interrupt is a hard interrupt (sourced from the hardware device itself), a soft interrupt (induced by the system through the use of some
       system interrupt source), a watchdog interrupt (induced by a periodic timer call), spurious (an interrupt entry point was entered but there
       was no interrupt to service), or multiple service (an interrupt was detected and serviced just prior to returning from  any  of	the  other
       types).

       Drivers	generally  report  only  claimed hard interrupts and soft interrupts from their handlers, but measurement of the spurious class of
       interrupts is useful for auto-vectored devices in order to pinpoint any interrupt latency problems in a particular system configuration.

       Devices that have more than one interrupt of the same type should use multiple structures.

STRUCTURE MEMBERS

       ulong_t	  intrs[KSTAT_NUM_INTRS];    /* interrupt counters */

       The only member exposed to drivers is the intrs member. This field is an array of counters. The driver must use the appropriate counter	in
       the array based on the type of interrupt condition.

       The following indexes are supported:

       KSTAT_INTR_HARD

	   Hard interrupt

       KSTAT_INTR_SOFT

	   Soft interrupt

       KSTAT_INTR_WATCHDOG

	   Watchdog interrupt

       KSTAT_INTR_SPURIOUS

	   Spurious interrupt

       KSTAT_INTR_MULTSVC

	   Multiple service interrupt

SEE ALSO

       kstat(9S)

       Writing Device Drivers

SunOS 5.10							    4 Apr 1994							    kstat_intr(9S)

ddi_intr_get_supported_types(9F)										  ddi_intr_get_supported_types(9F)

NAME

       ddi_intr_get_supported_types - return information on supported hardware interrupt types

SYNOPSIS

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

       int ddi_intr_get_supported_types(dev_info_t *dip, int *typesp);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI)

       dip	       Pointer to dev_info structure

       typesp	       Pointer to supported interrupt types

       The ddi_intr_get_supported_types() function retrieves the interrupt types supported by a particular hardware device and by the system soft-
       ware. Upon successful return, the supported types are returned as a bit mask in	the  integer  pointed  to  by  the  typesp  argument.  See
       <sys/ddi_intr.h> for a list of interrupts that can be returned by a hardware device.

       For PCI devices that support MSI and/or MSI-X based hardware, this interface returns only the interrupt types that are supported by all the
       hardware in the path to the hardware device.

       An interrupt type is usable by the hardware device if it is returned by the ddi_intr_get_supported_types() function. The device driver  can
       be programmed to use one of the returned interrupt types to receive hardware interrupts.

       The ddi_intr_get_supported_types() function returns:

       DDI_SUCCESS	       On success.

       DDI_EINVAL	       On encountering invalid input parameters.

       DDI_INTR_NOTFOUND       Returned when the hardware device is found not to support any hardware interrupts.

CONTEXT

       The ddi_intr_get_supported_types() function can be called from user or kernel non-interrupt context.

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

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

       pci(4), attributes(5), pcmcia(7D), sysbus(4), ddi_intr_add_handler(9F), ddi_intr_alloc(9F), ddi_intr_enable(9F)

       The  ddi_intr_get_supported_types()  function can be called by the device driver even at any time if the driver has added an interrupt han-
       dler for a given interrupt type.

       Soft interrupts are always usable and are not returned by this interface.

       Any consumer of this interface should verify that the return value is not equal to DDI_SUCCESS. Incomplete checking for failure codes could
       result in inconsistent behavior among platforms.

								    07 Apr 2005 				  ddi_intr_get_supported_types(9F)