Проект OpenNet: MAN ddi_dev_is_sid (9) Ядро (FreeBSD и Linux)

Интерактивная система просмотра системных руководств (man-ов)

ddi_dev_is_sid (9)

>> ddi_dev_is_sid (9) ( Solaris man: Ядро )

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

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  ...