NAME

ddi_dev_is_sid − tell whether a device is self-identifying

SYNOPSIS

#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
int ddi_dev_is_sid(dev_info_t ∗dip)

INTERFACE LEVEL

SPARC architecture specific (SPARC DDI). 

DESCRIPTION

ddi_dev_is_sid() tells the caller whether the device described by dip is self-identifying, that is, a device that can unequivocally tell the system that it exists. This is useful for drivers that support both a self-identifying as well as a non-self-identifying variants of a device (and therefore must be probed). 

ARGUMENTS

dip A pointer to the device’s dev_info structure. 

RETURN VALUES

DDI_SUCCESS
Device is self-identifying.

DDI_FAILURE
Device is not self-identifying.

CONTEXT

ddi_dev_is_sid() can be called from user or interrupt context.

EXAMPLE

 1  ...
 2  int
 3  bz_probe(dev_info_t ∗dip)
 4  {
 5          ...
 6          if (ddi_dev_is_sid(dip) == DDI_SUCCESS) {
 7                  /∗
 8                   ∗ This is the self-identifying version (OpenBoot).
 9                   ∗ No need to probe for it because we know it is there.
10                   ∗ The existence of dip && ddi_dev_is_sid() proves this.
11                   ∗/
12                  return (DDI_PROBE_DONTCARE);
13          }
14          /∗
15           ∗ Not a self-identifying variant of the device. Now we have to
16           ∗ do some work to see whether it is really attached to the
17           ∗ system.
18           ∗/
19  ...

SEE ALSO

probe(9E)

SunOS 5.1  —  Last change: 24 Oct 1991