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

Solaris DDI specific (Solaris DDI).

Parameters

dip

A pointer to the device's dev_info structure.

Description

The ddi_dev_is_sid() function 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).

Return Values

DDI_SUCCESS

Device is self-identifying.

DDI_FAILURE

Device is not self-identifying.

Context

The ddi_dev_is_sid() function can be called from user, interrupt, or kernel context.

Examples

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) Writing Device Drivers