getinfo() Entry Point (SCSI Target Drivers)

The getinfo(9E) routine for SCSI target drivers is much the same as for other drivers (see The getinfo() Entry Point for more information on DDI_INFO_DEVT2INSTANCE case). However, in the DDI_INFO_DEVT2DEVINFO case of the getinfo() routine, the target driver must return a pointer to its dev_info node. This pointer can be saved in the driver state structure or can be retrieved from the sd_dev field of the scsi_device(9S) structure. Example 14–4shows an alternative SCSI target driver getinfo() code fragment.

Example 14–4 Alternative SCSI Target Driver getinfo(9E) Code Fragment

...
case DDI_INFO_DEVT2DEVINFO:
        dev = (dev_t)arg;
        instance = getminor(dev);
        xsp = ddi_get_soft_state(statep, instance);
        if (xsp == NULL)
            return (DDI_FAILURE);
        *result = (void *)xsp->sdp->sd_dev;
        return (DDI_SUCCESS);
...