Manual section D2

_load - initialize a loadable driver
_unload - prepare to unload a driver
_verify - verify that driver supports a particular device
biostart - start an I/O transfer
chpoll - poll entry point for a non-STREAMS character device driver
close - relinquish access to a device
config - inform drivers of hardware device instances to be managed
devinfo - obtain information about a device
drvctl - handle custom I/O operations from another driver
halt - shut down the driver when the system shuts down
init - initialize a static device driver
intr - process a device interrupt
Intro - introduction to driver entry point routines
ioctl - perform device-specific control functions
mmap - support virtual mapping for memory-mapped device
open - gain access to a device
read - read data from a character device
size - return size of logical block device
start - initialize a static device driver (with interrupts enabled)
strategy - start an old-style block I/O transfer
write - write data to a character device