Function rte_bbdev_callback_register

dpdk/lib/bbdev/rte_bbdev.c:941–984

}

int
rte_bbdev_callback_register(uint16_t dev_id, enum rte_bbdev_event_type event,
		rte_bbdev_cb_fn cb_fn, void *cb_arg)
{
	struct rte_bbdev_callback *user_cb;
	struct rte_bbdev *dev = get_dev(dev_id);
	VALID_DEV_OR_RET_ERR(dev, dev_id);

	if (event >= RTE_BBDEV_EVENT_MAX) {
		rte_bbdev_log(ERR,
				"Invalid event type (%u), should be less than %u",
				event, RTE_BBDEV_EVENT_MAX);
		return -EINVAL;
	}

	if (cb_fn == NULL) {
		rte_bbdev_log(ERR, "NULL callback function");
		return -EINVAL;
	}

	rte_spinlock_lock(&rte_bbdev_cb_lock);

	TAILQ_FOREACH(user_cb, &(dev->list_cbs), next) {
		if (user_cb->cb_fn == cb_fn &&
				user_cb->cb_arg == cb_arg &&
				user_cb->event == event)
			break;
	}

	/* create a new callback. */
	if (user_cb == NULL) {
		user_cb = rte_zmalloc("INTR_USER_CALLBACK",
				sizeof(struct rte_bbdev_callback), 0);
		if (user_cb != NULL) {
			user_cb->cb_fn = cb_fn;
			user_cb->cb_arg = cb_arg;
			user_cb->event = event;
			TAILQ_INSERT_TAIL(&(dev->list_cbs), user_cb, next);
		}
	}

	rte_spinlock_unlock(&rte_bbdev_cb_lock);
	return (user_cb == NULL) ? -ENOMEM : 0;
}

int
rte_bbdev_callback_unregister(uint16_t dev_id, enum rte_bbdev_event_type event,