SVR5

do_drvctl(D3)

do_drvctl -- call another driver's drvctl(D2) entry point routine

Synopsis

   #include <sys/types.h>
   #include <sys/ddi.h>
   
   int do_drvctl(chan_handle_t chan_handle, int cmd, void *arg);

Description

do_drvctl( ) calls another driver's drvctl(D2) entry point routine. The driver must first obtain a channel handle with the drv_open(D3) function.

Arguments

chan_handle: Channel handle reteurned by the drv_open(D3) function in the other driver.
cmd: cmd parameter to be passed to the other driver's drvctl(D2) routine.
arg: arg parameter to be passed to the other driver's drvctl(D2) routine.

Return values

Usage

Context and synchronization

User or blockable context.

Hardware applicability

All

Version applicability

ddi: 8, 8mp

Differences between versions

References

drvctl(D2)

``Layered device drivers'' in HDK Technical Reference