Function eth_dev_tx_queue_config

dpdk/lib/ethdev/ethdev_private.c:443–471

}

int
eth_dev_tx_queue_config(struct rte_eth_dev *dev, uint16_t nb_queues)
{
	uint16_t old_nb_queues = dev->data->nb_tx_queues;
	unsigned int i;

	if (dev->data->tx_queues == NULL && nb_queues != 0) { /* first time configuration */
		dev->data->tx_queues = rte_zmalloc("ethdev->tx_queues",
				sizeof(dev->data->tx_queues[0]) *
				RTE_MAX_QUEUES_PER_PORT,
				RTE_CACHE_LINE_SIZE);
		if (dev->data->tx_queues == NULL) {
			dev->data->nb_tx_queues = 0;
			return -(ENOMEM);
		}
	} else if (dev->data->tx_queues != NULL && nb_queues != 0) { /* re-configure */
		for (i = nb_queues; i < old_nb_queues; i++)
			eth_dev_txq_release(dev, i);

	} else if (dev->data->tx_queues != NULL && nb_queues == 0) {
		for (i = nb_queues; i < old_nb_queues; i++)
			eth_dev_txq_release(dev, i);

		rte_free(dev->data->tx_queues);
		dev->data->tx_queues = NULL;
	}
	dev->data->nb_tx_queues = nb_queues;
	return 0;
}