Function vmxnet3_dev_tx_queue_setup

dpdk/drivers/net/vmxnet3/vmxnet3_rxtx.c:1088–1187

}

int
vmxnet3_dev_tx_queue_setup(struct rte_eth_dev *dev,
			   uint16_t queue_idx,
			   uint16_t nb_desc,
			   unsigned int socket_id,
			   const struct rte_eth_txconf *tx_conf __rte_unused)
{
	struct vmxnet3_hw *hw = dev->data->dev_private;
	const struct rte_memzone *mz;
	struct vmxnet3_tx_queue *txq;
	struct vmxnet3_cmd_ring *ring;
	struct vmxnet3_comp_ring *comp_ring;
	struct vmxnet3_data_ring *data_ring;
	int size;

	PMD_INIT_FUNC_TRACE();

	txq = rte_zmalloc("ethdev_tx_queue", sizeof(struct vmxnet3_tx_queue),
			  RTE_CACHE_LINE_SIZE);
	if (txq == NULL) {
		PMD_INIT_LOG(ERR, "Can not allocate tx queue structure");
		return -ENOMEM;
	}

	txq->queue_id = queue_idx;
	txq->port_id = dev->data->port_id;
	txq->shared = NULL; /* set in vmxnet3_setup_driver_shared() */
	txq->hw = hw;
	txq->qid = queue_idx;
	txq->stopped = TRUE;
	txq->txdata_desc_size = hw->txdata_desc_size;

	ring = &txq->cmd_ring;
	comp_ring = &txq->comp_ring;
	data_ring = &txq->data_ring;

	/* Tx vmxnet ring length should be between 512-4096 */
	if (nb_desc < VMXNET3_DEF_TX_RING_SIZE) {
		PMD_INIT_LOG(ERR, "VMXNET3 Tx Ring Size Min: %u",
			     VMXNET3_DEF_TX_RING_SIZE);
		return -EINVAL;
	} else if (nb_desc > VMXNET3_TX_RING_MAX_SIZE) {
		PMD_INIT_LOG(ERR, "VMXNET3 Tx Ring Size Max: %u",
			     VMXNET3_TX_RING_MAX_SIZE);
		return -EINVAL;
	} else {
		ring->size = nb_desc;
		if (VMXNET3_VERSION_GE_7(hw))
			ring->size = rte_align32prevpow2(nb_desc);
		ring->size &= ~VMXNET3_RING_SIZE_MASK;
	}
	comp_ring->size = data_ring->size = ring->size;

	/* Tx vmxnet rings structure initialization*/
	ring->next2fill = 0;
	ring->next2comp = 0;
	ring->gen = VMXNET3_INIT_GEN;
	comp_ring->next2proc = 0;