pcitool_dev_reg_ops
rv = pcitool_dev_reg_ops(dip, (void *)arg,
extern int pcitool_dev_reg_ops(dev_info_t *dip, void *arg, int cmd, int mode);
rv = pcitool_dev_reg_ops(
extern int pcitool_dev_reg_ops(dev_t dev, void *arg, int cmd, int mode);