Function mrvl_dev_start

dpdk/drivers/net/mvpp2/mrvl_ethdev.c:791–966

* DPDK callback to start the device. * * @param dev * Pointer to Ethernet device structure. * * @return * 0 on success, negative errno value on failure. */

 *   0 on success, negative errno value on failure.
 */
static int
mrvl_dev_start(struct rte_eth_dev *dev)
{
	struct mrvl_priv *priv = dev->data->dev_private;
	char match[MRVL_MATCH_LEN];
	int ret = 0, i, def_init_size;
	struct rte_ether_addr *mac_addr;

	if (priv->ppio)
		return mrvl_dev_set_link_up(dev);

	snprintf(match, sizeof(match), "ppio-%d:%d",
		 priv->pp_id, priv->ppio_id);
	priv->ppio_params.match = match;
	priv->ppio_params.eth_start_hdr = PP2_PPIO_HDR_ETH;
	priv->forward_bad_frames = 0;
	priv->fill_bpool_buffs = MRVL_BURST_SIZE;

	if (mrvl_cfg) {
		priv->ppio_params.eth_start_hdr =
			mrvl_cfg->port[dev->data->port_id].eth_start_hdr;
		priv->forward_bad_frames =
			mrvl_cfg->port[dev->data->port_id].forward_bad_frames;
		priv->fill_bpool_buffs =
			mrvl_cfg->port[dev->data->port_id].fill_bpool_buffs;
	}

	/*
	 * Calculate the minimum bpool size for refill feature as follows:
	 * 2 default burst sizes multiply by number of rx queues.
	 * If the bpool size will be below this value, new buffers will
	 * be added to the pool.
	 */
	priv->bpool_min_size = priv->nb_rx_queues * MRVL_BURST_SIZE * 2;

	/* In case initial bpool size configured in queues setup is
	 * smaller than minimum size add more buffers
	 */
	def_init_size = priv->bpool_min_size + MRVL_BURST_SIZE * 2;
	if (priv->bpool_init_size < def_init_size) {
		int buffs_to_add = def_init_size - priv->bpool_init_size;

		priv->bpool_init_size += buffs_to_add;
		ret = mrvl_fill_bpool(dev->data->rx_queues[0], buffs_to_add);
		if (ret)
			MRVL_LOG(ERR, "Failed to add buffers to bpool");
	}

	/*
	 * Calculate the maximum bpool size for refill feature as follows:
	 * maximum number of descriptors in rx queue multiply by number
	 * of rx queues plus minimum bpool size.
	 * In case the bpool size will exceed this value, superfluous buffers
	 * will be removed
	 */
	priv->bpool_max_size = (priv->nb_rx_queues * MRVL_PP2_RXD_MAX) +
				priv->bpool_min_size;