https://docs.oracle.com/cd/E88353_01/html/E37855/ddi-dev-nintrs-9f.html
ddi_dev_nintrs - man pages section 9: DDI and DKI Kernel Functions
ddi_dev_nintrs - return the number of interrupt specifications a device has Solaris DDI specific (Solaris DDI). This interface is obsolete. Use the new...
man pagesddidev