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NAME

      device_get_softc - access driver private instance variables

SYNOPSIS

      #include <sys/param.h>
      #include <sys/bus.h>
 
      void *
      device_get_softc(device_t dev);

DESCRIPTION

      Return the driver-specific state of dev.  The softc is automatically
      allocated and zeroed when the device is attached.  The softc is also ini‐
      tialized and present when a device is probed, but is subject to caveats
      as described in DEVICE_PROBE(9).  The size of the allocation is deter‐
      mined by the device’s driver_t information used to define the driver.
      The softc typically encapsulates the state of this instance of the
      device.
 
      Driver writers are discouraged from using their own softc management
      mechanisms.  Driver writers should not copy such mechanisms found in
      drivers in the tree that predate this function.
      The pointer to the driver-specific instance variable is returned.
      DEVICE_PROBE(9), device(9), device_set_softc(9), driver(9)

AUTHORS

      This manual page was written by Doug Rabson.